Merge tag 'drm-misc-next-2022-10-20' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 6.2:

UAPI Changes:
- Documentation for page-flip flags

Cross-subsystem Changes:
- dma-buf: Add unlocked variant of vmapping and attachment-mapping
functions

Core Changes:
- atomic-helpers: CRTC primary plane test fixes
- connector: TV API consistency improvements, cmdline parsing
improvements
- crtc-helpers: Introduce drm_crtc_helper_atomic_check() helper
- edid: Fixes for HFVSDB parsing,
- fourcc: Addition of the Vivante tiled modifier
- makefile: Sort and reorganize the objects files
- mode_config: Remove fb_base from drm_mode_config_funcs
- sched: Add a module parameter to change the scheduling policy,
refcounting fix for fences
- tests: Sort the Kunit tests in the Makefile, improvements to the
DP-MST tests
- ttm: Remove unnecessary drm_mm_clean() call

Driver Changes:
- New driver: ofdrm
- Move all drivers to a common dma-buf locking convention
- bridge:
- adv7533: Remove dynamic lane switching
- it6505: Runtime PM support
- ps8640: Handle AUX defer messages
- tc358775: Drop soft-reset over I2C
- ast: Atomic Gamma LUT Support, Convert to SHMEM, various
improvements
- lcdif: Support for YUV planes
- mgag200: Fix PLL Setup on some revisions
- udl: Modesetting improvements, hot-unplug support
- vc4: Fix support for PAL-M

Signed-off-by: Dave Airlie <[e-mail]>

From: Maxime Ripard <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/20221020072405.g3o4hxuk75gmeumw@houat

Documentation/driver-api/dma-buf.rst

···
 
 .. kernel-doc:: include/uapi/linux/dma-buf.h
 
+DMA-BUF locking convention
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. kernel-doc:: drivers/dma-buf/dma-buf.c
+   :doc: locking convention
+
 Kernel Functions and Structures Reference
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

MAINTAINERS

···
 S:	Maintained
 T:	git git://anongit.freedesktop.org/drm/drm-misc
 F:	drivers/gpu/drm/drm_aperture.c
+F:	drivers/gpu/drm/tiny/ofdrm.c
 F:	drivers/gpu/drm/tiny/simpledrm.c
 F:	drivers/video/aperture.c
 F:	include/drm/drm_aperture.h

drivers/dma-buf/dma-buf.c

···
 
 	dmabuf->file = file;
 
-	mutex_init(&dmabuf->lock);
 	INIT_LIST_HEAD(&dmabuf->attachments);
 
 	mutex_lock(&db_list.lock);
···
 }
 
 /**
+ * DOC: locking convention
+ *
+ * In order to avoid deadlock situations between dma-buf exports and importers,
+ * all dma-buf API users must follow the common dma-buf locking convention.
+ *
+ * Convention for importers
+ *
+ * 1. Importers must hold the dma-buf reservation lock when calling these
+ *    functions:
+ *
+ *     - dma_buf_pin()
+ *     - dma_buf_unpin()
+ *     - dma_buf_map_attachment()
+ *     - dma_buf_unmap_attachment()
+ *     - dma_buf_vmap()
+ *     - dma_buf_vunmap()
+ *
+ * 2. Importers must not hold the dma-buf reservation lock when calling these
+ *    functions:
+ *
+ *     - dma_buf_attach()
+ *     - dma_buf_dynamic_attach()
+ *     - dma_buf_detach()
+ *     - dma_buf_export(
+ *     - dma_buf_fd()
+ *     - dma_buf_get()
+ *     - dma_buf_put()
+ *     - dma_buf_mmap()
+ *     - dma_buf_begin_cpu_access()
+ *     - dma_buf_end_cpu_access()
+ *     - dma_buf_map_attachment_unlocked()
+ *     - dma_buf_unmap_attachment_unlocked()
+ *     - dma_buf_vmap_unlocked()
+ *     - dma_buf_vunmap_unlocked()
+ *
+ * Convention for exporters
+ *
+ * 1. These &dma_buf_ops callbacks are invoked with unlocked dma-buf
+ *    reservation and exporter can take the lock:
+ *
+ *     - &dma_buf_ops.attach()
+ *     - &dma_buf_ops.detach()
+ *     - &dma_buf_ops.release()
+ *     - &dma_buf_ops.begin_cpu_access()
+ *     - &dma_buf_ops.end_cpu_access()
+ *
+ * 2. These &dma_buf_ops callbacks are invoked with locked dma-buf
+ *    reservation and exporter can't take the lock:
+ *
+ *     - &dma_buf_ops.pin()
+ *     - &dma_buf_ops.unpin()
+ *     - &dma_buf_ops.map_dma_buf()
+ *     - &dma_buf_ops.unmap_dma_buf()
+ *     - &dma_buf_ops.mmap()
+ *     - &dma_buf_ops.vmap()
+ *     - &dma_buf_ops.vunmap()
+ *
+ * 3. Exporters must hold the dma-buf reservation lock when calling these
+ *    functions:
+ *
+ *     - dma_buf_move_notify()
+ */
+
+/**
  * dma_buf_dynamic_attach - Add the device to dma_buf's attachments list
  * @dmabuf:		[in]	buffer to attach device to.
  * @dev:		[in]	device to be attached.
···
 	    dma_buf_is_dynamic(dmabuf)) {
 		struct sg_table *sgt;
 
+		dma_resv_lock(attach->dmabuf->resv, NULL);
 		if (dma_buf_is_dynamic(attach->dmabuf)) {
-			dma_resv_lock(attach->dmabuf->resv, NULL);
 			ret = dmabuf->ops->pin(attach);
 			if (ret)
 				goto err_unlock;
···
 			ret = PTR_ERR(sgt);
 			goto err_unpin;
 		}
-		if (dma_buf_is_dynamic(attach->dmabuf))
-			dma_resv_unlock(attach->dmabuf->resv);
+		dma_resv_unlock(attach->dmabuf->resv);
 		attach->sgt = sgt;
 		attach->dir = DMA_BIDIRECTIONAL;
 	}
···
 		dmabuf->ops->unpin(attach);
 
 err_unlock:
-	if (dma_buf_is_dynamic(attach->dmabuf))
-		dma_resv_unlock(attach->dmabuf->resv);
+	dma_resv_unlock(attach->dmabuf->resv);
 
 	dma_buf_detach(dmabuf, attach);
 	return ERR_PTR(ret);
···
 	if (WARN_ON(!dmabuf || !attach))
 		return;
 
+	dma_resv_lock(attach->dmabuf->resv, NULL);
+
 	if (attach->sgt) {
-		if (dma_buf_is_dynamic(attach->dmabuf))
-			dma_resv_lock(attach->dmabuf->resv, NULL);
 
 		__unmap_dma_buf(attach, attach->sgt, attach->dir);
 
-		if (dma_buf_is_dynamic(attach->dmabuf)) {
+		if (dma_buf_is_dynamic(attach->dmabuf))
 			dmabuf->ops->unpin(attach);
-			dma_resv_unlock(attach->dmabuf->resv);
-		}
 	}
-
-	dma_resv_lock(dmabuf->resv, NULL);
 	list_del(&attach->node);
+
 	dma_resv_unlock(dmabuf->resv);
+
 	if (dmabuf->ops->detach)
 		dmabuf->ops->detach(dmabuf, attach);
 
···
 	if (WARN_ON(!attach || !attach->dmabuf))
 		return ERR_PTR(-EINVAL);
 
-	if (dma_buf_attachment_is_dynamic(attach))
-		dma_resv_assert_held(attach->dmabuf->resv);
+	dma_resv_assert_held(attach->dmabuf->resv);
 
 	if (attach->sgt) {
 		/*
···
 	}
 
 	if (dma_buf_is_dynamic(attach->dmabuf)) {
-		dma_resv_assert_held(attach->dmabuf->resv);
 		if (!IS_ENABLED(CONFIG_DMABUF_MOVE_NOTIFY)) {
 			r = attach->dmabuf->ops->pin(attach);
 			if (r)
···
 EXPORT_SYMBOL_NS_GPL(dma_buf_map_attachment, DMA_BUF);
 
 /**
+ * dma_buf_map_attachment_unlocked - Returns the scatterlist table of the attachment;
+ * mapped into _device_ address space. Is a wrapper for map_dma_buf() of the
+ * dma_buf_ops.
+ * @attach:	[in]	attachment whose scatterlist is to be returned
+ * @direction:	[in]	direction of DMA transfer
+ *
+ * Unlocked variant of dma_buf_map_attachment().
+ */
+struct sg_table *
+dma_buf_map_attachment_unlocked(struct dma_buf_attachment *attach,
+				enum dma_data_direction direction)
+{
+	struct sg_table *sg_table;
+
+	might_sleep();
+
+	if (WARN_ON(!attach || !attach->dmabuf))
+		return ERR_PTR(-EINVAL);
+
+	dma_resv_lock(attach->dmabuf->resv, NULL);
+	sg_table = dma_buf_map_attachment(attach, direction);
+	dma_resv_unlock(attach->dmabuf->resv);
+
+	return sg_table;
+}
+EXPORT_SYMBOL_NS_GPL(dma_buf_map_attachment_unlocked, DMA_BUF);
+
+/**
  * dma_buf_unmap_attachment - unmaps and decreases usecount of the buffer;might
  * deallocate the scatterlist associated. Is a wrapper for unmap_dma_buf() of
  * dma_buf_ops.
···
 	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))
 		return;
 
-	if (dma_buf_attachment_is_dynamic(attach))
-		dma_resv_assert_held(attach->dmabuf->resv);
+	dma_resv_assert_held(attach->dmabuf->resv);
 
 	if (attach->sgt == sg_table)
 		return;
-
-	if (dma_buf_is_dynamic(attach->dmabuf))
-		dma_resv_assert_held(attach->dmabuf->resv);
 
 	__unmap_dma_buf(attach, sg_table, direction);
 
···
 		dma_buf_unpin(attach);
 }
 EXPORT_SYMBOL_NS_GPL(dma_buf_unmap_attachment, DMA_BUF);
+
+/**
+ * dma_buf_unmap_attachment_unlocked - unmaps and decreases usecount of the buffer;might
+ * deallocate the scatterlist associated. Is a wrapper for unmap_dma_buf() of
+ * dma_buf_ops.
+ * @attach:	[in]	attachment to unmap buffer from
+ * @sg_table:	[in]	scatterlist info of the buffer to unmap
+ * @direction:	[in]	direction of DMA transfer
+ *
+ * Unlocked variant of dma_buf_unmap_attachment().
+ */
+void dma_buf_unmap_attachment_unlocked(struct dma_buf_attachment *attach,
+				       struct sg_table *sg_table,
+				       enum dma_data_direction direction)
+{
+	might_sleep();
+
+	if (WARN_ON(!attach || !attach->dmabuf || !sg_table))
+		return;
+
+	dma_resv_lock(attach->dmabuf->resv, NULL);
+	dma_buf_unmap_attachment(attach, sg_table, direction);
+	dma_resv_unlock(attach->dmabuf->resv);
+}
+EXPORT_SYMBOL_NS_GPL(dma_buf_unmap_attachment_unlocked, DMA_BUF);
 
 /**
  * dma_buf_move_notify - notify attachments that DMA-buf is moving
···
 int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma,
 		 unsigned long pgoff)
 {
+	int ret;
+
 	if (WARN_ON(!dmabuf || !vma))
 		return -EINVAL;
 
···
 	vma_set_file(vma, dmabuf->file);
 	vma->vm_pgoff = pgoff;
 
-	return dmabuf->ops->mmap(dmabuf, vma);
+	dma_resv_lock(dmabuf->resv, NULL);
+	ret = dmabuf->ops->mmap(dmabuf, vma);
+	dma_resv_unlock(dmabuf->resv);
+
+	return ret;
 }
 EXPORT_SYMBOL_NS_GPL(dma_buf_mmap, DMA_BUF);
 
···
 int dma_buf_vmap(struct dma_buf *dmabuf, struct iosys_map *map)
 {
 	struct iosys_map ptr;
-	int ret = 0;
+	int ret;
 
 	iosys_map_clear(map);
 
 	if (WARN_ON(!dmabuf))
 		return -EINVAL;
 
+	dma_resv_assert_held(dmabuf->resv);
+
 	if (!dmabuf->ops->vmap)
 		return -EINVAL;
 
-	mutex_lock(&dmabuf->lock);
 	if (dmabuf->vmapping_counter) {
 		dmabuf->vmapping_counter++;
 		BUG_ON(iosys_map_is_null(&dmabuf->vmap_ptr));
 		*map = dmabuf->vmap_ptr;
-		goto out_unlock;
+		return 0;
 	}
 
 	BUG_ON(iosys_map_is_set(&dmabuf->vmap_ptr));
 
 	ret = dmabuf->ops->vmap(dmabuf, &ptr);
 	if (WARN_ON_ONCE(ret))
-		goto out_unlock;
+		return ret;
 
 	dmabuf->vmap_ptr = ptr;
 	dmabuf->vmapping_counter = 1;
 
 	*map = dmabuf->vmap_ptr;
 
-out_unlock:
-	mutex_unlock(&dmabuf->lock);
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL_NS_GPL(dma_buf_vmap, DMA_BUF);
+
+/**
+ * dma_buf_vmap_unlocked - Create virtual mapping for the buffer object into kernel
+ * address space. Same restrictions as for vmap and friends apply.
+ * @dmabuf:	[in]	buffer to vmap
+ * @map:	[out]	returns the vmap pointer
+ *
+ * Unlocked version of dma_buf_vmap()
+ *
+ * Returns 0 on success, or a negative errno code otherwise.
+ */
+int dma_buf_vmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map)
+{
+	int ret;
+
+	iosys_map_clear(map);
+
+	if (WARN_ON(!dmabuf))
+		return -EINVAL;
+
+	dma_resv_lock(dmabuf->resv, NULL);
+	ret = dma_buf_vmap(dmabuf, map);
+	dma_resv_unlock(dmabuf->resv);
+
+	return ret;
+}
+EXPORT_SYMBOL_NS_GPL(dma_buf_vmap_unlocked, DMA_BUF);
 
 /**
  * dma_buf_vunmap - Unmap a vmap obtained by dma_buf_vmap.
···
 	if (WARN_ON(!dmabuf))
 		return;
 
+	dma_resv_assert_held(dmabuf->resv);
+
 	BUG_ON(iosys_map_is_null(&dmabuf->vmap_ptr));
 	BUG_ON(dmabuf->vmapping_counter == 0);
 	BUG_ON(!iosys_map_is_equal(&dmabuf->vmap_ptr, map));
 
-	mutex_lock(&dmabuf->lock);
 	if (--dmabuf->vmapping_counter == 0) {
 		if (dmabuf->ops->vunmap)
 			dmabuf->ops->vunmap(dmabuf, map);
 		iosys_map_clear(&dmabuf->vmap_ptr);
 	}
-	mutex_unlock(&dmabuf->lock);
 }
 EXPORT_SYMBOL_NS_GPL(dma_buf_vunmap, DMA_BUF);
+
+/**
+ * dma_buf_vunmap_unlocked - Unmap a vmap obtained by dma_buf_vmap.
+ * @dmabuf:	[in]	buffer to vunmap
+ * @map:	[in]	vmap pointer to vunmap
+ */
+void dma_buf_vunmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map)
+{
+	if (WARN_ON(!dmabuf))
+		return;
+
+	dma_resv_lock(dmabuf->resv, NULL);
+	dma_buf_vunmap(dmabuf, map);
+	dma_resv_unlock(dmabuf->resv);
+}
+EXPORT_SYMBOL_NS_GPL(dma_buf_vunmap_unlocked, DMA_BUF);
 
 #ifdef CONFIG_DEBUG_FS
 static int dma_buf_debug_show(struct seq_file *s, void *unused)

drivers/gpu/drm/Makefile

···
 
 CFLAGS-$(CONFIG_DRM_USE_DYNAMIC_DEBUG)	+= -DDYNAMIC_DEBUG_MODULE
 
-drm-y       :=	drm_aperture.o drm_auth.o drm_cache.o \
-		drm_file.o drm_gem.o drm_ioctl.o \
-		drm_drv.o \
-		drm_sysfs.o drm_mm.o \
-		drm_crtc.o drm_fourcc.o drm_modes.o drm_edid.o drm_displayid.o \
-		drm_trace_points.o drm_prime.o \
-		drm_vma_manager.o \
-		drm_modeset_lock.o drm_atomic.o drm_bridge.o \
-		drm_framebuffer.o drm_connector.o drm_blend.o \
-		drm_encoder.o drm_mode_object.o drm_property.o \
-		drm_plane.o drm_color_mgmt.o drm_print.o \
-		drm_dumb_buffers.o drm_mode_config.o drm_vblank.o \
-		drm_syncobj.o drm_lease.o drm_writeback.o drm_client.o \
-		drm_client_modeset.o drm_atomic_uapi.o \
-		drm_managed.o drm_vblank_work.o
-drm-$(CONFIG_DRM_LEGACY) += drm_agpsupport.o drm_bufs.o drm_context.o drm_dma.o \
-			    drm_hashtab.o drm_irq.o drm_legacy_misc.o drm_lock.o \
-			    drm_memory.o drm_scatter.o drm_vm.o
+drm-y := \
+	drm_aperture.o \
+	drm_atomic.o \
+	drm_atomic_uapi.o \
+	drm_auth.o \
+	drm_blend.o \
+	drm_bridge.o \
+	drm_cache.o \
+	drm_client.o \
+	drm_client_modeset.o \
+	drm_color_mgmt.o \
+	drm_connector.o \
+	drm_crtc.o \
+	drm_displayid.o \
+	drm_drv.o \
+	drm_dumb_buffers.o \
+	drm_edid.o \
+	drm_encoder.o \
+	drm_file.o \
+	drm_fourcc.o \
+	drm_framebuffer.o \
+	drm_gem.o \
+	drm_ioctl.o \
+	drm_lease.o \
+	drm_managed.o \
+	drm_mm.o \
+	drm_mode_config.o \
+	drm_mode_object.o \
+	drm_modes.o \
+	drm_modeset_lock.o \
+	drm_plane.o \
+	drm_prime.o \
+	drm_print.o \
+	drm_property.o \
+	drm_syncobj.o \
+	drm_sysfs.o \
+	drm_trace_points.o \
+	drm_vblank.o \
+	drm_vblank_work.o \
+	drm_vma_manager.o \
+	drm_writeback.o
+drm-$(CONFIG_DRM_LEGACY) += \
+	drm_agpsupport.o \
+	drm_bufs.o \
+	drm_context.o \
+	drm_dma.o \
+	drm_hashtab.o \
+	drm_irq.o \
+	drm_legacy_misc.o \
+	drm_lock.o \
+	drm_memory.o \
+	drm_scatter.o \
+	drm_vm.o
 drm-$(CONFIG_DRM_LIB_RANDOM) += lib/drm_random.o
 drm-$(CONFIG_COMPAT) += drm_ioc32.o
 drm-$(CONFIG_DRM_PANEL) += drm_panel.o
 drm-$(CONFIG_OF) += drm_of.o
 drm-$(CONFIG_PCI) += drm_pci.o
-drm-$(CONFIG_DEBUG_FS) += drm_debugfs.o drm_debugfs_crc.o
+drm-$(CONFIG_DEBUG_FS) += \
+	drm_debugfs.o \
+	drm_debugfs_crc.o
 drm-$(CONFIG_DRM_LOAD_EDID_FIRMWARE) += drm_edid_load.o
-drm-$(CONFIG_DRM_PRIVACY_SCREEN) += drm_privacy_screen.o drm_privacy_screen_x86.o
+drm-$(CONFIG_DRM_PRIVACY_SCREEN) += \
+	drm_privacy_screen.o \
+	drm_privacy_screen_x86.o
 obj-$(CONFIG_DRM)	+= drm.o
 
 obj-$(CONFIG_DRM_NOMODESET) += drm_nomodeset.o
···
 # Modesetting helpers
 #
 
-drm_kms_helper-y := drm_bridge_connector.o drm_crtc_helper.o \
-		drm_encoder_slave.o drm_flip_work.o \
-		drm_probe_helper.o \
-		drm_plane_helper.o drm_atomic_helper.o \
-		drm_kms_helper_common.o \
-		drm_simple_kms_helper.o drm_modeset_helper.o \
-		drm_gem_atomic_helper.o \
-		drm_gem_framebuffer_helper.o \
-		drm_atomic_state_helper.o drm_damage_helper.o \
-		drm_format_helper.o drm_self_refresh_helper.o drm_rect.o
+drm_kms_helper-y := \
+	drm_atomic_helper.o \
+	drm_atomic_state_helper.o \
+	drm_bridge_connector.o \
+	drm_crtc_helper.o \
+	drm_damage_helper.o \
+	drm_encoder_slave.o \
+	drm_flip_work.o \
+	drm_format_helper.o \
+	drm_gem_atomic_helper.o \
+	drm_gem_framebuffer_helper.o \
+	drm_kms_helper_common.o \
+	drm_modeset_helper.o \
+	drm_plane_helper.o \
+	drm_probe_helper.o \
+	drm_rect.o \
+	drm_self_refresh_helper.o \
+	drm_simple_kms_helper.o
 drm_kms_helper-$(CONFIG_DRM_PANEL_BRIDGE) += bridge/panel.o
 drm_kms_helper-$(CONFIG_DRM_FBDEV_EMULATION) += drm_fb_helper.o
 obj-$(CONFIG_DRM_KMS_HELPER) += drm_kms_helper.o

drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c

···
 	adev_to_drm(adev)->mode_config.preferred_depth = 24;
 	adev_to_drm(adev)->mode_config.prefer_shadow = 1;
 
-	adev_to_drm(adev)->mode_config.fb_base = adev->gmc.aper_base;
-
 	r = amdgpu_display_modeset_create_props(adev);
 	if (r)
 		return r;

drivers/gpu/drm/amd/amdgpu/dce_v10_0.c

···
 
 	adev_to_drm(adev)->mode_config.fb_modifiers_not_supported = true;
 
-	adev_to_drm(adev)->mode_config.fb_base = adev->gmc.aper_base;
-
 	r = amdgpu_display_modeset_create_props(adev);
 	if (r)
 		return r;

drivers/gpu/drm/amd/amdgpu/dce_v11_0.c

···
 
 	adev_to_drm(adev)->mode_config.fb_modifiers_not_supported = true;
 
-	adev_to_drm(adev)->mode_config.fb_base = adev->gmc.aper_base;
-
 	r = amdgpu_display_modeset_create_props(adev);
 	if (r)
 		return r;

drivers/gpu/drm/amd/amdgpu/dce_v6_0.c

···
 	adev_to_drm(adev)->mode_config.preferred_depth = 24;
 	adev_to_drm(adev)->mode_config.prefer_shadow = 1;
 	adev_to_drm(adev)->mode_config.fb_modifiers_not_supported = true;
-	adev_to_drm(adev)->mode_config.fb_base = adev->gmc.aper_base;
 
 	r = amdgpu_display_modeset_create_props(adev);
 	if (r)

drivers/gpu/drm/amd/amdgpu/dce_v8_0.c

···
 
 	adev_to_drm(adev)->mode_config.fb_modifiers_not_supported = true;
 
-	adev_to_drm(adev)->mode_config.fb_base = adev->gmc.aper_base;
-
 	r = amdgpu_display_modeset_create_props(adev);
 	if (r)
 		return r;

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

···
 	/* indicates support for immediate flip */
 	adev_to_drm(adev)->mode_config.async_page_flip = true;
 
-	adev_to_drm(adev)->mode_config.fb_base = adev->gmc.aper_base;
-
 	state = kzalloc(sizeof(*state), GFP_KERNEL);
 	if (!state)
 		return -ENOMEM;

drivers/gpu/drm/armada/armada_gem.c

···
 	if (dobj->obj.import_attach) {
 		/* We only ever display imported data */
 		if (dobj->sgt)
-			dma_buf_unmap_attachment(dobj->obj.import_attach,
-						 dobj->sgt, DMA_TO_DEVICE);
+			dma_buf_unmap_attachment_unlocked(dobj->obj.import_attach,
+							  dobj->sgt, DMA_TO_DEVICE);
 		drm_prime_gem_destroy(&dobj->obj, NULL);
 	}
 
···
 {
 	int ret;
 
-	dobj->sgt = dma_buf_map_attachment(dobj->obj.import_attach,
-					   DMA_TO_DEVICE);
+	dobj->sgt = dma_buf_map_attachment_unlocked(dobj->obj.import_attach,
+						    DMA_TO_DEVICE);
 	if (IS_ERR(dobj->sgt)) {
 		ret = PTR_ERR(dobj->sgt);
 		dobj->sgt = NULL;

drivers/gpu/drm/ast/Kconfig

···
 config DRM_AST
 	tristate "AST server chips"
 	depends on DRM && PCI && MMU
+	select DRM_GEM_SHMEM_HELPER
 	select DRM_KMS_HELPER
-	select DRM_VRAM_HELPER
-	select DRM_TTM
-	select DRM_TTM_HELPER
 	help
 	 Say yes for experimental AST GPU driver. Do not enable
 	 this driver without having a working -modesetting,

drivers/gpu/drm/ast/ast_drv.c

···
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_drv.h>
-#include <drm/drm_gem_vram_helper.h>
+#include <drm/drm_gem_shmem_helper.h>
 #include <drm/drm_module.h>
 #include <drm/drm_probe_helper.h>
 
···
 	.minor = DRIVER_MINOR,
 	.patchlevel = DRIVER_PATCHLEVEL,
 
-	DRM_GEM_VRAM_DRIVER
+	DRM_GEM_SHMEM_DRIVER_OPS
 };
 
 /*

drivers/gpu/drm/ast/ast_drv.h

···
 #define AST_DRAM_8Gx16   8
 
 /*
- * Cursor plane
+ * Hardware cursor
  */
 
 #define AST_MAX_HWC_WIDTH	64
···
 
 #define AST_HWC_SIZE		(AST_MAX_HWC_WIDTH * AST_MAX_HWC_HEIGHT * 2)
 #define AST_HWC_SIGNATURE_SIZE	32
-
-#define AST_DEFAULT_HWC_NUM	2
 
 /* define for signature structure */
 #define AST_HWC_SIGNATURE_CHECKSUM	0x00
···
 #define AST_HWC_SIGNATURE_HOTSPOTX	0x14
 #define AST_HWC_SIGNATURE_HOTSPOTY	0x18
 
-struct ast_cursor_plane {
+/*
+ * Planes
+ */
+
+struct ast_plane {
 	struct drm_plane base;
 
-	struct {
-		struct drm_gem_vram_object *gbo;
-		struct iosys_map map;
-		u64 off;
-	} hwc[AST_DEFAULT_HWC_NUM];
-
-	unsigned int next_hwc_index;
+	void __iomem *vaddr;
+	u64 offset;
+	unsigned long size;
 };
 
-static inline struct ast_cursor_plane *
-to_ast_cursor_plane(struct drm_plane *plane)
+static inline struct ast_plane *to_ast_plane(struct drm_plane *plane)
 {
-	return container_of(plane, struct ast_cursor_plane, base);
+	return container_of(plane, struct ast_plane, base);
 }
 
 /*
···
 	uint32_t dram_type;
 	uint32_t mclk;
 
-	struct drm_plane primary_plane;
-	struct ast_cursor_plane cursor_plane;
+	void __iomem	*vram;
+	unsigned long	vram_base;
+	unsigned long	vram_size;
+	unsigned long	vram_fb_available;
+
+	struct ast_plane primary_plane;
+	struct ast_plane cursor_plane;
 	struct drm_crtc crtc;
 	struct {
 		struct {

drivers/gpu/drm/ast/ast_main.c

···
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_gem.h>
-#include <drm/drm_gem_vram_helper.h>
 #include <drm/drm_managed.h>
 
 #include "ast_drv.h"
···
 
 	/* map reserved buffer */
 	ast->dp501_fw_buf = NULL;
-	if (dev->vram_mm->vram_size < pci_resource_len(pdev, 0)) {
-		ast->dp501_fw_buf = pci_iomap_range(pdev, 0, dev->vram_mm->vram_size, 0);
+	if (ast->vram_size < pci_resource_len(pdev, 0)) {
+		ast->dp501_fw_buf = pci_iomap_range(pdev, 0, ast->vram_size, 0);
 		if (!ast->dp501_fw_buf)
 			drm_info(dev, "failed to map reserved buffer!\n");
 	}

drivers/gpu/drm/ast/ast_mm.c

···
 
 #include <linux/pci.h>
 
-#include <drm/drm_gem_vram_helper.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_print.h>
 
···
 	struct pci_dev *pdev = to_pci_dev(dev->dev);
 	resource_size_t base, size;
 	u32 vram_size;
-	int ret;
 
 	base = pci_resource_start(pdev, 0);
 	size = pci_resource_len(pdev, 0);
···
 
 	vram_size = ast_get_vram_size(ast);
 
-	ret = drmm_vram_helper_init(dev, base, vram_size);
-	if (ret) {
-		drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
-		return ret;
-	}
+	ast->vram = devm_ioremap_wc(dev->dev, base, vram_size);
+	if (!ast->vram)
+		return -ENOMEM;
+
+	ast->vram_base = base;
+	ast->vram_size = vram_size;
+	ast->vram_fb_available = vram_size;
 
 	return 0;
 }

drivers/gpu/drm/ast/ast_mode.c

···
 #include <drm/drm_atomic_state_helper.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
+#include <drm/drm_damage_helper.h>
 #include <drm/drm_edid.h>
+#include <drm/drm_format_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_gem_atomic_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
-#include <drm/drm_gem_vram_helper.h>
+#include <drm/drm_gem_shmem_helper.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_simple_kms_helper.h>
 
 #include "ast_drv.h"
 #include "ast_tables.h"
+
+#define AST_LUT_SIZE 256
 
 static inline void ast_load_palette_index(struct ast_private *ast,
 				     u8 index, u8 red, u8 green,
···
 	ast_io_read8(ast, AST_IO_SEQ_PORT);
 }
 
-static void ast_crtc_load_lut(struct ast_private *ast, struct drm_crtc *crtc)
+static void ast_crtc_set_gamma_linear(struct ast_private *ast,
+				      const struct drm_format_info *format)
 {
-	u16 *r, *g, *b;
 	int i;
 
-	if (!crtc->enabled)
-		return;
+	switch (format->format) {
+	case DRM_FORMAT_C8: /* In this case, gamma table is used as color palette */
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_XRGB8888:
+		for (i = 0; i < AST_LUT_SIZE; i++)
+			ast_load_palette_index(ast, i, i, i, i);
+		break;
+	default:
+		drm_warn_once(&ast->base, "Unsupported format %p4cc for gamma correction\n",
+			      &format->format);
+		break;
+	}
+}
 
-	r = crtc->gamma_store;
-	g = r + crtc->gamma_size;
-	b = g + crtc->gamma_size;
+static void ast_crtc_set_gamma(struct ast_private *ast,
+			       const struct drm_format_info *format,
+			       struct drm_color_lut *lut)
+{
+	int i;
 
-	for (i = 0; i < 256; i++)
-		ast_load_palette_index(ast, i, *r++ >> 8, *g++ >> 8, *b++ >> 8);
+	switch (format->format) {
+	case DRM_FORMAT_C8: /* In this case, gamma table is used as color palette */
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_XRGB8888:
+		for (i = 0; i < AST_LUT_SIZE; i++)
+			ast_load_palette_index(ast, i,
+					       lut[i].red >> 8,
+					       lut[i].green >> 8,
+					       lut[i].blue >> 8);
+		break;
+	default:
+		drm_warn_once(&ast->base, "Unsupported format %p4cc for gamma correction\n",
+			      &format->format);
+		break;
+	}
 }
 
 static bool ast_get_vbios_mode_info(const struct drm_format_info *format,
···
 }
 
 /*
+ * Planes
+ */
+
+static int ast_plane_init(struct drm_device *dev, struct ast_plane *ast_plane,
+			  void __iomem *vaddr, u64 offset, unsigned long size,
+			  uint32_t possible_crtcs,
+			  const struct drm_plane_funcs *funcs,
+			  const uint32_t *formats, unsigned int format_count,
+			  const uint64_t *format_modifiers,
+			  enum drm_plane_type type)
+{
+	struct drm_plane *plane = &ast_plane->base;
+
+	ast_plane->vaddr = vaddr;
+	ast_plane->offset = offset;
+	ast_plane->size = size;
+
+	return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
+					formats, format_count, format_modifiers,
+					type, NULL);
+}
+
+/*
  * Primary plane
  */
 
···
 static int ast_primary_plane_helper_atomic_check(struct drm_plane *plane,
 						 struct drm_atomic_state *state)
 {
-	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
-										 plane);
-	struct drm_crtc_state *crtc_state;
-	struct ast_crtc_state *ast_crtc_state;
+	struct drm_device *dev = plane->dev;
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_crtc_state *new_crtc_state = NULL;
+	struct ast_crtc_state *new_ast_crtc_state;
 	int ret;
 
-	if (!new_plane_state->crtc)
-		return 0;
+	if (new_plane_state->crtc)
+		new_crtc_state = drm_atomic_get_new_crtc_state(state, new_plane_state->crtc);
 
-	crtc_state = drm_atomic_get_new_crtc_state(state,
-						   new_plane_state->crtc);
-
-	ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
+	ret = drm_atomic_helper_check_plane_state(new_plane_state, new_crtc_state,
 						  DRM_PLANE_NO_SCALING,
 						  DRM_PLANE_NO_SCALING,
 						  false, true);
-	if (ret)
+	if (ret) {
 		return ret;
+	} else if (!new_plane_state->visible) {
+		if (drm_WARN_ON(dev, new_plane_state->crtc)) /* cannot legally happen */
+			return -EINVAL;
+		else
+			return 0;
+	}
 
-	if (!new_plane_state->visible)
-		return 0;
+	new_ast_crtc_state = to_ast_crtc_state(new_crtc_state);
 
-	ast_crtc_state = to_ast_crtc_state(crtc_state);
-
-	ast_crtc_state->format = new_plane_state->fb->format;
+	new_ast_crtc_state->format = new_plane_state->fb->format;
 
 	return 0;
 }
 
-static void
-ast_primary_plane_helper_atomic_update(struct drm_plane *plane,
-				       struct drm_atomic_state *state)
+static void ast_handle_damage(struct ast_plane *ast_plane, struct iosys_map *src,
+			      struct drm_framebuffer *fb,
+			      const struct drm_rect *clip)
 {
-	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
-									   plane);
+	struct iosys_map dst = IOSYS_MAP_INIT_VADDR(ast_plane->vaddr);
+
+	iosys_map_incr(&dst, drm_fb_clip_offset(fb->pitches[0], fb->format, clip));
+	drm_fb_memcpy(&dst, fb->pitches, src, fb, clip);
+}
+
+static void ast_primary_plane_helper_atomic_update(struct drm_plane *plane,
+						   struct drm_atomic_state *state)
+{
 	struct drm_device *dev = plane->dev;
 	struct ast_private *ast = to_ast_private(dev);
-	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
-									   plane);
-	struct drm_gem_vram_object *gbo;
-	s64 gpu_addr;
-	struct drm_framebuffer *fb = new_state->fb;
-	struct drm_framebuffer *old_fb = old_state->fb;
+	struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
+	struct drm_framebuffer *fb = plane_state->fb;
+	struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
+	struct drm_framebuffer *old_fb = old_plane_state->fb;
+	struct ast_plane *ast_plane = to_ast_plane(plane);
+	struct drm_rect damage;
+	struct drm_atomic_helper_damage_iter iter;
 
 	if (!old_fb || (fb->format != old_fb->format)) {
-		struct drm_crtc_state *crtc_state = new_state->crtc->state;
+		struct drm_crtc *crtc = plane_state->crtc;
+		struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
 		struct ast_crtc_state *ast_crtc_state = to_ast_crtc_state(crtc_state);
 		struct ast_vbios_mode_info *vbios_mode_info = &ast_crtc_state->vbios_mode_info;
 
···
 		ast_set_vbios_color_reg(ast, fb->format, vbios_mode_info);
 	}
 
-	gbo = drm_gem_vram_of_gem(fb->obj[0]);
-	gpu_addr = drm_gem_vram_offset(gbo);
-	if (drm_WARN_ON_ONCE(dev, gpu_addr < 0))
-		return; /* Bug: we didn't pin the BO to VRAM in prepare_fb. */
+	drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
+	drm_atomic_for_each_plane_damage(&iter, &damage) {
+		ast_handle_damage(ast_plane, shadow_plane_state->data, fb, &damage);
+	}
 
-	ast_set_offset_reg(ast, fb);
-	ast_set_start_address_crt1(ast, (u32)gpu_addr);
-
-	ast_set_index_reg_mask(ast, AST_IO_SEQ_PORT, 0x1, 0xdf, 0x00);
+	/*
+	 * Some BMCs stop scanning out the video signal after the driver
+	 * reprogrammed the offset or scanout address. This stalls display
+	 * output for several seconds and makes the display unusable.
+	 * Therefore only update the offset if it changes and reprogram the
+	 * address after enabling the plane.
+	 */
+	if (!old_fb || old_fb->pitches[0] != fb->pitches[0])
+		ast_set_offset_reg(ast, fb);
+	if (!old_fb) {
+		ast_set_start_address_crt1(ast, (u32)ast_plane->offset);
+		ast_set_index_reg_mask(ast, AST_IO_SEQ_PORT, 0x1, 0xdf, 0x00);
+	}
 }
 
-static void
-ast_primary_plane_helper_atomic_disable(struct drm_plane *plane,
-					struct drm_atomic_state *state)
+static void ast_primary_plane_helper_atomic_disable(struct drm_plane *plane,
+						    struct drm_atomic_state *state)
 {
 	struct ast_private *ast = to_ast_private(plane->dev);
 
···
 }
 
 static const struct drm_plane_helper_funcs ast_primary_plane_helper_funcs = {
-	DRM_GEM_VRAM_PLANE_HELPER_FUNCS,
+	DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
 	.atomic_check = ast_primary_plane_helper_atomic_check,
 	.atomic_update = ast_primary_plane_helper_atomic_update,
 	.atomic_disable = ast_primary_plane_helper_atomic_disable,
···
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
 	.destroy = drm_plane_cleanup,
-	.reset = drm_atomic_helper_plane_reset,
-	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
-	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+	DRM_GEM_SHADOW_PLANE_FUNCS,
 };
 
 static int ast_primary_plane_init(struct ast_private *ast)
 {
 	struct drm_device *dev = &ast->base;
-	struct drm_plane *primary_plane = &ast->primary_plane;
+	struct ast_plane *ast_primary_plane = &ast->primary_plane;
+	struct drm_plane *primary_plane = &ast_primary_plane->base;
+	void __iomem *vaddr = ast->vram;
+	u64 offset = ast->vram_base;
+	unsigned long cursor_size = roundup(AST_HWC_SIZE + AST_HWC_SIGNATURE_SIZE, PAGE_SIZE);
+	unsigned long size = ast->vram_fb_available - cursor_size;
 	int ret;
 
-	ret = drm_universal_plane_init(dev, primary_plane, 0x01,
-				       &ast_primary_plane_funcs,
-				       ast_primary_plane_formats,
-				       ARRAY_SIZE(ast_primary_plane_formats),
-				       NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
+	ret = ast_plane_init(dev, ast_primary_plane, vaddr, offset, size,
+			     0x01, &ast_primary_plane_funcs,
+			     ast_primary_plane_formats, ARRAY_SIZE(ast_primary_plane_formats),
+			     NULL, DRM_PLANE_TYPE_PRIMARY);
 	if (ret) {
-		drm_err(dev, "drm_universal_plane_init() failed: %d\n", ret);
+		drm_err(dev, "ast_plane_init() failed: %d\n", ret);
 		return ret;
 	}
 	drm_plane_helper_add(primary_plane, &ast_primary_plane_helper_funcs);
+	drm_plane_enable_fb_damage_clips(primary_plane);
 
 	return 0;
 }
···
 static int ast_cursor_plane_helper_atomic_check(struct drm_plane *plane,
 						struct drm_atomic_state *state)
 {
-	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
-										 plane);
-	struct drm_framebuffer *fb = new_plane_state->fb;
-	struct drm_crtc_state *crtc_state;
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_framebuffer *new_fb = new_plane_state->fb;
+	struct drm_crtc_state *new_crtc_state = NULL;
 	int ret;
 
-	if (!new_plane_state->crtc)
-		return 0;
+	if (new_plane_state->crtc)
+		new_crtc_state = drm_atomic_get_new_crtc_state(state, new_plane_state->crtc);
 
-	crtc_state = drm_atomic_get_new_crtc_state(state,
-						   new_plane_state->crtc);
-
-	ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
+	ret = drm_atomic_helper_check_plane_state(new_plane_state, new_crtc_state,
 						  DRM_PLANE_NO_SCALING,
 						  DRM_PLANE_NO_SCALING,
 						  true, true);
-	if (ret)
+	if (ret || !new_plane_state->visible)
 		return ret;
 
-	if (!new_plane_state->visible)
-		return 0;
-
-	if (fb->width > AST_MAX_HWC_WIDTH || fb->height > AST_MAX_HWC_HEIGHT)
+	if (new_fb->width > AST_MAX_HWC_WIDTH || new_fb->height > AST_MAX_HWC_HEIGHT)
 		return -EINVAL;
 
 	return 0;
 }
 
-static void
-ast_cursor_plane_helper_atomic_update(struct drm_plane *plane,
-				      struct drm_atomic_state *state)
+static void ast_cursor_plane_helper_atomic_update(struct drm_plane *plane,
+						  struct drm_atomic_state *state)
 {
-	struct ast_cursor_plane *ast_cursor_plane = to_ast_cursor_plane(plane);
-	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
-									   plane);
-	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
-									   plane);
-	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(new_state);
-	struct drm_framebuffer *fb = new_state->fb;
+	struct ast_plane *ast_plane = to_ast_plane(plane);
+	struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
+	struct drm_framebuffer *fb = plane_state->fb;
+	struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
 	struct ast_private *ast = to_ast_private(plane->dev);
-	struct iosys_map dst_map =
-		ast_cursor_plane->hwc[ast_cursor_plane->next_hwc_index].map;
-	u64 dst_off =
-		ast_cursor_plane->hwc[ast_cursor_plane->next_hwc_index].off;
 	struct iosys_map src_map = shadow_plane_state->data[0];
+	struct drm_rect damage;
+	const u8 *src = src_map.vaddr; /* TODO: Use mapping abstraction properly */
+	u64 dst_off = ast_plane->offset;
+	u8 __iomem *dst = ast_plane->vaddr; /* TODO: Use mapping abstraction properly */
+	u8 __iomem *sig = dst + AST_HWC_SIZE; /* TODO: Use mapping abstraction properly */
 	unsigned int offset_x, offset_y;
 	u16 x, y;
 	u8 x_offset, y_offset;
-	u8 __iomem *dst;
-	u8 __iomem *sig;
-	const u8 *src;
-
-	src = src_map.vaddr; /* TODO: Use mapping abstraction properly */
-	dst = dst_map.vaddr_iomem; /* TODO: Use mapping abstraction properly */
-	sig = dst + AST_HWC_SIZE; /* TODO: Use mapping abstraction properly */
 
 	/*
-	 * Do data transfer to HW cursor BO. If a new cursor image was installed,
-	 * point the scanout engine to dst_gbo's offset and page-flip the HWC buffers.
+	 * Do data transfer to hardware buffer and point the scanout
+	 * engine to the offset.
 	 */
 
-	ast_update_cursor_image(dst, src, fb->width, fb->height);
-
-	if (new_state->fb != old_state->fb) {
+	if (drm_atomic_helper_damage_merged(old_plane_state, plane_state, &damage)) {
+		ast_update_cursor_image(dst, src, fb->width, fb->height);
 		ast_set_cursor_base(ast, dst_off);
-
-		++ast_cursor_plane->next_hwc_index;
-		ast_cursor_plane->next_hwc_index %= ARRAY_SIZE(ast_cursor_plane->hwc);
 	}
 
 	/*
 	 * Update location in HWC signature and registers.
 	 */
 
-	writel(new_state->crtc_x, sig + AST_HWC_SIGNATURE_X);
-	writel(new_state->crtc_y, sig + AST_HWC_SIGNATURE_Y);
+	writel(plane_state->crtc_x, sig + AST_HWC_SIGNATURE_X);
+	writel(plane_state->crtc_y, sig + AST_HWC_SIGNATURE_Y);
 
 	offset_x = AST_MAX_HWC_WIDTH - fb->width;
 	offset_y = AST_MAX_HWC_HEIGHT - fb->height;
 
-	if (new_state->crtc_x < 0) {
-		x_offset = (-new_state->crtc_x) + offset_x;
+	if (plane_state->crtc_x < 0) {
+		x_offset = (-plane_state->crtc_x) + offset_x;
 		x = 0;
 	} else {
 		x_offset = offset_x;
-		x = new_state->crtc_x;
+		x = plane_state->crtc_x;
 	}
-	if (new_state->crtc_y < 0) {
-		y_offset = (-new_state->crtc_y) + offset_y;
+	if (plane_state->crtc_y < 0) {
+		y_offset = (-plane_state->crtc_y) + offset_y;
 		y = 0;
 	} else {
 		y_offset = offset_y;
-		y = new_state->crtc_y;
+		y = plane_state->crtc_y;
 	}
 
 	ast_set_cursor_location(ast, x, y, x_offset, y_offset);
···
 	ast_set_cursor_enabled(ast, true);
 }
 
-static void
-ast_cursor_plane_helper_atomic_disable(struct drm_plane *plane,
-				       struct drm_atomic_state *state)
+static void ast_cursor_plane_helper_atomic_disable(struct drm_plane *plane,
+						   struct drm_atomic_state *state)
 {
 	struct ast_private *ast = to_ast_private(plane->dev);
 
···
 	.atomic_disable = ast_cursor_plane_helper_atomic_disable,
 };
 
-static void ast_cursor_plane_destroy(struct drm_plane *plane)
-{
-	struct ast_cursor_plane *ast_cursor_plane = to_ast_cursor_plane(plane);
-	size_t i;
-	struct drm_gem_vram_object *gbo;
-	struct iosys_map map;
-
-	for (i = 0; i < ARRAY_SIZE(ast_cursor_plane->hwc); ++i) {
-		gbo = ast_cursor_plane->hwc[i].gbo;
-		map = ast_cursor_plane->hwc[i].map;
-		drm_gem_vram_vunmap(gbo, &map);
-		drm_gem_vram_unpin(gbo);
-		drm_gem_vram_put(gbo);
-	}
-
-	drm_plane_cleanup(plane);
-}
-
 static const struct drm_plane_funcs ast_cursor_plane_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
-	.destroy = ast_cursor_plane_destroy,
+	.destroy = drm_plane_cleanup,
 	DRM_GEM_SHADOW_PLANE_FUNCS,
 };
 
 static int ast_cursor_plane_init(struct ast_private *ast)
 {
 	struct drm_device *dev = &ast->base;
-	struct ast_cursor_plane *ast_cursor_plane = &ast->cursor_plane;
+	struct ast_plane *ast_cursor_plane = &ast->cursor_plane;
 	struct drm_plane *cursor_plane = &ast_cursor_plane->base;
-	size_t size, i;
-	struct drm_gem_vram_object *gbo;
-	struct iosys_map map;
+	size_t size;
+	void __iomem *vaddr;
+	u64 offset;
 	int ret;
-	s64 off;
 
 	/*
 	 * Allocate backing storage for cursors. The BOs are permanently
···
 
 	size = roundup(AST_HWC_SIZE + AST_HWC_SIGNATURE_SIZE, PAGE_SIZE);
 
-	for (i = 0; i < ARRAY_SIZE(ast_cursor_plane->hwc); ++i) {
-		gbo = drm_gem_vram_create(dev, size, 0);
-		if (IS_ERR(gbo)) {
-			ret = PTR_ERR(gbo);
-			goto err_hwc;
-		}
-		ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM |
-					    DRM_GEM_VRAM_PL_FLAG_TOPDOWN);
-		if (ret)
-			goto err_drm_gem_vram_put;
-		ret = drm_gem_vram_vmap(gbo, &map);
-		if (ret)
-			goto err_drm_gem_vram_unpin;
-		off = drm_gem_vram_offset(gbo);
-		if (off < 0) {
-			ret = off;
-			goto err_drm_gem_vram_vunmap;
-		}
-		ast_cursor_plane->hwc[i].gbo = gbo;
-		ast_cursor_plane->hwc[i].map = map;
-		ast_cursor_plane->hwc[i].off = off;
-	}
+	if (ast->vram_fb_available < size)
+		return -ENOMEM;
 
-	/*
-	 * Create the cursor plane. The plane's destroy callback will release
-	 * the backing storages' BO memory.
-	 */
+	vaddr = ast->vram + ast->vram_fb_available - size;
+	offset = ast->vram_base + ast->vram_fb_available - size;
 
-	ret = drm_universal_plane_init(dev, cursor_plane, 0x01,
-				       &ast_cursor_plane_funcs,
-				       ast_cursor_plane_formats,
-				       ARRAY_SIZE(ast_cursor_plane_formats),
-				       NULL, DRM_PLANE_TYPE_CURSOR, NULL);
+	ret = ast_plane_init(dev, ast_cursor_plane, vaddr, offset, size,
+			     0x01, &ast_cursor_plane_funcs,
+			     ast_cursor_plane_formats, ARRAY_SIZE(ast_cursor_plane_formats),
+			     NULL, DRM_PLANE_TYPE_CURSOR);
 	if (ret) {
-		drm_err(dev, "drm_universal_plane failed(): %d\n", ret);
-		goto err_hwc;
+		drm_err(dev, "ast_plane_init() failed: %d\n", ret);
+		return ret;
 	}
 	drm_plane_helper_add(cursor_plane, &ast_cursor_plane_helper_funcs);
+	drm_plane_enable_fb_damage_clips(cursor_plane);
+
+	ast->vram_fb_available -= size;
 
 	return 0;
-
-err_hwc:
-	while (i) {
-		--i;
-		gbo = ast_cursor_plane->hwc[i].gbo;
-		map = ast_cursor_plane->hwc[i].map;
-err_drm_gem_vram_vunmap:
-		drm_gem_vram_vunmap(gbo, &map);
-err_drm_gem_vram_unpin:
-		drm_gem_vram_unpin(gbo);
-err_drm_gem_vram_put:
-		drm_gem_vram_put(gbo);
-	}
-	return ret;
 }
 
 /*
···
 
 			ast_set_color_reg(ast, format);
 			ast_set_vbios_color_reg(ast, format, vbios_mode_info);
+			if (crtc->state->gamma_lut)
+				ast_crtc_set_gamma(ast, format, crtc->state->gamma_lut->data);
+			else
+				ast_crtc_set_gamma_linear(ast, format);
 		}
-
-		ast_crtc_load_lut(ast, crtc);
 		break;
 	case DRM_MODE_DPMS_STANDBY:
 	case DRM_MODE_DPMS_SUSPEND:
···
 					struct drm_atomic_state *state)
 {
 	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+	struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
+	struct ast_crtc_state *old_ast_crtc_state = to_ast_crtc_state(old_crtc_state);
 	struct drm_device *dev = crtc->dev;
 	struct ast_crtc_state *ast_state;
 	const struct drm_format_info *format;
 	bool succ;
 	int ret;
 
-	ret = drm_atomic_helper_check_crtc_state(crtc_state, false);
+	if (!crtc_state->enable)
+		return 0;
+
+	ret = drm_atomic_helper_check_crtc_primary_plane(crtc_state);
 	if (ret)
 		return ret;
-
-	if (!crtc_state->enable)
-		goto out;
 
 	ast_state = to_ast_crtc_state(crtc_state);
 
···
 	if (drm_WARN_ON_ONCE(dev, !format))
 		return -EINVAL; /* BUG: We didn't set format in primary check(). */
 
+	/*
+	 * The gamma LUT has to be reloaded after changing the primary
+	 * plane's color format.
+	 */
+	if (old_ast_crtc_state->format != format)
+		crtc_state->color_mgmt_changed = true;
+
+	if (crtc_state->color_mgmt_changed && crtc_state->gamma_lut) {
+		if (crtc_state->gamma_lut->length !=
+		    AST_LUT_SIZE * sizeof(struct drm_color_lut)) {
+			drm_err(dev, "Wrong size for gamma_lut %zu\n",
+				crtc_state->gamma_lut->length);
+			return -EINVAL;
+		}
+	}
+
 	succ = ast_get_vbios_mode_info(format, &crtc_state->mode,
 				       &crtc_state->adjusted_mode,
 				       &ast_state->vbios_mode_info);
 	if (!succ)
 		return -EINVAL;
 
-out:
-	return drm_atomic_add_affected_planes(state, crtc);
-}
-
-static void ast_crtc_helper_atomic_begin(struct drm_crtc *crtc, struct drm_atomic_state *state)
-{
-	struct drm_device *dev = crtc->dev;
-	struct ast_private *ast = to_ast_private(dev);
-
-	/*
-	 * Concurrent operations could possibly trigger a call to
-	 * drm_connector_helper_funcs.get_modes by trying to read the
-	 * display modes. Protect access to I/O registers by acquiring
-	 * the I/O-register lock. Released in atomic_flush().
-	 */
-	mutex_lock(&ast->ioregs_lock);
+	return 0;
 }
 
 static void
···
 {
 	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
 									  crtc);
-	struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state,
-									      crtc);
 	struct drm_device *dev = crtc->dev;
 	struct ast_private *ast = to_ast_private(dev);
 	struct ast_crtc_state *ast_crtc_state = to_ast_crtc_state(crtc_state);
-	struct ast_crtc_state *old_ast_crtc_state = to_ast_crtc_state(old_crtc_state);
 	struct ast_vbios_mode_info *vbios_mode_info = &ast_crtc_state->vbios_mode_info;
 
 	/*
 	 * The gamma LUT has to be reloaded after changing the primary
 	 * plane's color format.
 	 */
-	if (old_ast_crtc_state->format != ast_crtc_state->format)
-		ast_crtc_load_lut(ast, crtc);
+	if (crtc_state->enable && crtc_state->color_mgmt_changed) {
+		if (crtc_state->gamma_lut)
+			ast_crtc_set_gamma(ast,
+					   ast_crtc_state->format,
+					   crtc_state->gamma_lut->data);
+		else
+			ast_crtc_set_gamma_linear(ast, ast_crtc_state->format);
+	}
 
 	//Set Aspeed Display-Port
 	if (ast->tx_chip_types & AST_TX_ASTDP_BIT)
 		ast_dp_set_mode(crtc, vbios_mode_info);
-
-	mutex_unlock(&ast->ioregs_lock);
 }
 
-static void
-ast_crtc_helper_atomic_enable(struct drm_crtc *crtc,
-			      struct drm_atomic_state *state)
+static void ast_crtc_helper_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_state *state)
 {
 	struct drm_device *dev = crtc->dev;
 	struct ast_private *ast = to_ast_private(dev);
-	struct drm_crtc_state *crtc_state = crtc->state;
+	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
 	struct ast_crtc_state *ast_crtc_state = to_ast_crtc_state(crtc_state);
 	struct ast_vbios_mode_info *vbios_mode_info =
 		&ast_crtc_state->vbios_mode_info;
···
 	ast_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
 }
 
-static void
-ast_crtc_helper_atomic_disable(struct drm_crtc *crtc,
-			       struct drm_atomic_state *state)
+static void ast_crtc_helper_atomic_disable(struct drm_crtc *crtc, struct drm_atomic_state *state)
 {
-	struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state,
-									      crtc);
+	struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
 	struct drm_device *dev = crtc->dev;
 	struct ast_private *ast = to_ast_private(dev);
 
···
 static const struct drm_crtc_helper_funcs ast_crtc_helper_funcs = {
 	.mode_valid = ast_crtc_helper_mode_valid,
 	.atomic_check = ast_crtc_helper_atomic_check,
-	.atomic_begin = ast_crtc_helper_atomic_begin,
 	.atomic_flush = ast_crtc_helper_atomic_flush,
 	.atomic_enable = ast_crtc_helper_atomic_enable,
 	.atomic_disable = ast_crtc_helper_atomic_disable,
···
 	struct drm_crtc *crtc = &ast->crtc;
 	int ret;
 
-	ret = drm_crtc_init_with_planes(dev, crtc, &ast->primary_plane,
+	ret = drm_crtc_init_with_planes(dev, crtc, &ast->primary_plane.base,
 					&ast->cursor_plane.base, &ast_crtc_funcs,
 					NULL);
 	if (ret)
 		return ret;
 
-	drm_mode_crtc_set_gamma_size(crtc, 256);
+	drm_mode_crtc_set_gamma_size(crtc, AST_LUT_SIZE);
+	drm_crtc_enable_color_mgmt(crtc, 0, false, AST_LUT_SIZE);
+
 	drm_crtc_helper_add(crtc, &ast_crtc_helper_funcs);
 
 	return 0;
···
  * Mode config
  */
 
+static void ast_mode_config_helper_atomic_commit_tail(struct drm_atomic_state *state)
+{
+	struct ast_private *ast = to_ast_private(state->dev);
+
+	/*
+	 * Concurrent operations could possibly trigger a call to
+	 * drm_connector_helper_funcs.get_modes by trying to read the
+	 * display modes. Protect access to I/O registers by acquiring
+	 * the I/O-register lock. Released in atomic_flush().
+	 */
+	mutex_lock(&ast->ioregs_lock);
+	drm_atomic_helper_commit_tail_rpm(state);
+	mutex_unlock(&ast->ioregs_lock);
+}
+
 static const struct drm_mode_config_helper_funcs ast_mode_config_helper_funcs = {
-	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
+	.atomic_commit_tail = ast_mode_config_helper_atomic_commit_tail,
 };
 
+static enum drm_mode_status ast_mode_config_mode_valid(struct drm_device *dev,
+						       const struct drm_display_mode *mode)
+{
+	static const unsigned long max_bpp = 4; /* DRM_FORMAT_XRGB8888 */
+	struct ast_private *ast = to_ast_private(dev);
+	unsigned long fbsize, fbpages, max_fbpages;
+
+	max_fbpages = (ast->vram_fb_available) >> PAGE_SHIFT;
+
+	fbsize = mode->hdisplay * mode->vdisplay * max_bpp;
+	fbpages = DIV_ROUND_UP(fbsize, PAGE_SIZE);
+
+	if (fbpages > max_fbpages)
+		return MODE_MEM;
+
+	return MODE_OK;
+}
+
 static const struct drm_mode_config_funcs ast_mode_config_funcs = {
-	.fb_create = drm_gem_fb_create,
-	.mode_valid = drm_vram_helper_mode_valid,
+	.fb_create = drm_gem_fb_create_with_dirty,
+	.mode_valid = ast_mode_config_mode_valid,
 	.atomic_check = drm_atomic_helper_check,
 	.atomic_commit = drm_atomic_helper_commit,
 };
···
 int ast_mode_config_init(struct ast_private *ast)
 {
 	struct drm_device *dev = &ast->base;
-	struct pci_dev *pdev = to_pci_dev(dev->dev);
 	int ret;
 
 	ret = drmm_mode_config_init(dev);
···
 	dev->mode_config.min_width = 0;
 	dev->mode_config.min_height = 0;
 	dev->mode_config.preferred_depth = 24;
-	dev->mode_config.prefer_shadow = 1;
-	dev->mode_config.fb_base = pci_resource_start(pdev, 0);
 
 	if (ast->chip == AST2100 ||
 	    ast->chip == AST2200 ||
···
 	}
 
 	dev->mode_config.helper_private = &ast_mode_config_helper_funcs;
-
 
 	ret = ast_primary_plane_init(ast);
 	if (ret)

drivers/gpu/drm/bridge/adv7511/adv7511.h

···
 
 void adv7533_dsi_power_on(struct adv7511 *adv);
 void adv7533_dsi_power_off(struct adv7511 *adv);
-void adv7533_mode_set(struct adv7511 *adv, const struct drm_display_mode *mode);
+enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv,
+					const struct drm_display_mode *mode);
 int adv7533_patch_registers(struct adv7511 *adv);
 int adv7533_patch_cec_registers(struct adv7511 *adv);
 int adv7533_attach_dsi(struct adv7511 *adv);

drivers/gpu/drm/bridge/adv7511/adv7511_drv.c

···
 }
 
 static enum drm_mode_status adv7511_mode_valid(struct adv7511 *adv7511,
-			      struct drm_display_mode *mode)
+			      const struct drm_display_mode *mode)
 {
 	if (mode->clock > 165000)
 		return MODE_CLOCK_HIGH;
···
 		0x6, low_refresh_rate << 1);
 	regmap_update_bits(adv7511->regmap, 0x17,
 		0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
-
-	if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
-		adv7533_mode_set(adv7511, adj_mode);
 
 	drm_mode_copy(&adv7511->curr_mode, adj_mode);
 
···
 	adv7511_mode_set(adv, mode, adj_mode);
 }
 
+static enum drm_mode_status adv7511_bridge_mode_valid(struct drm_bridge *bridge,
+						      const struct drm_display_info *info,
+		const struct drm_display_mode *mode)
+{
+	struct adv7511 *adv = bridge_to_adv7511(bridge);
+
+	if (adv->type == ADV7533 || adv->type == ADV7535)
+		return adv7533_mode_valid(adv, mode);
+	else
+		return adv7511_mode_valid(adv, mode);
+}
+
 static int adv7511_bridge_attach(struct drm_bridge *bridge,
 				 enum drm_bridge_attach_flags flags)
 {
···
 	.enable = adv7511_bridge_enable,
 	.disable = adv7511_bridge_disable,
 	.mode_set = adv7511_bridge_mode_set,
+	.mode_valid = adv7511_bridge_mode_valid,
 	.attach = adv7511_bridge_attach,
 	.detect = adv7511_bridge_detect,
 	.get_edid = adv7511_bridge_get_edid,

drivers/gpu/drm/bridge/adv7511/adv7533.c

···
 	regmap_write(adv->regmap_cec, 0x27, 0x0b);
 }
 
-void adv7533_mode_set(struct adv7511 *adv, const struct drm_display_mode *mode)
+enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv,
+					const struct drm_display_mode *mode)
 {
+	int lanes;
 	struct mipi_dsi_device *dsi = adv->dsi;
-	int lanes, ret;
-
-	if (adv->num_dsi_lanes != 4)
-		return;
 
 	if (mode->clock > 80000)
 		lanes = 4;
 	else
 		lanes = 3;
 
-	if (lanes != dsi->lanes) {
-		mipi_dsi_detach(dsi);
-		dsi->lanes = lanes;
-		ret = mipi_dsi_attach(dsi);
-		if (ret)
-			dev_err(&dsi->dev, "failed to change host lanes\n");
-	}
+	/*
+	 * TODO: add support for dynamic switching of lanes
+	 * by using the bridge pre_enable() op . Till then filter
+	 * out the modes which shall need different number of lanes
+	 * than what was configured in the device tree.
+	 */
+	if (lanes != dsi->lanes)
+		return MODE_BAD;
+
+	return MODE_OK;
 }
 
 int adv7533_patch_registers(struct adv7511 *adv)

drivers/gpu/drm/bridge/ite-it6505.c

···
 	struct notifier_block event_nb;
 	struct extcon_dev *extcon;
 	struct work_struct extcon_wq;
+	int extcon_state;
 	enum drm_connector_status connector_status;
 	enum link_train_status link_state;
 	struct work_struct link_works;
···
 {
 	struct it6505 *it6505 = container_of(work, struct it6505, extcon_wq);
 	struct device *dev = &it6505->client->dev;
-	int state = extcon_get_state(it6505->extcon, EXTCON_DISP_DP);
-	unsigned int pwroffretry = 0;
+	int state, ret;
 
 	if (it6505->enable_drv_hold)
 		return;
 
 	mutex_lock(&it6505->extcon_lock);
 
+	state = extcon_get_state(it6505->extcon, EXTCON_DISP_DP);
 	DRM_DEV_DEBUG_DRIVER(dev, "EXTCON_DISP_DP = 0x%02x", state);
-	if (state > 0) {
+
+	if (state == it6505->extcon_state || unlikely(state < 0))
+		goto unlock;
+	it6505->extcon_state = state;
+	if (state) {
 		DRM_DEV_DEBUG_DRIVER(dev, "start to power on");
 		msleep(100);
-		it6505_poweron(it6505);
+		ret = pm_runtime_get_sync(dev);
+
+		/*
+		 * On system resume, extcon_work can be triggered before
+		 * pm_runtime_force_resume re-enables runtime power management.
+		 * Handling the error here to make sure the bridge is powered on.
+		 */
+		if (ret)
+			it6505_poweron(it6505);
 	} else {
 		DRM_DEV_DEBUG_DRIVER(dev, "start to power off");
-		while (it6505_poweroff(it6505) && pwroffretry++ < 5) {
-			DRM_DEV_DEBUG_DRIVER(dev, "power off fail %d times",
-					     pwroffretry);
-		}
+		pm_runtime_put_sync(dev);
 
 		drm_helper_hpd_irq_event(it6505->bridge.dev);
 		memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
 		DRM_DEV_DEBUG_DRIVER(dev, "power off it6505 success!");
 	}
 
+unlock:
 	mutex_unlock(&it6505->extcon_lock);
 }
 
···
 	}
 }
 
+static void it6505_bridge_atomic_pre_enable(struct drm_bridge *bridge,
+					    struct drm_bridge_state *old_state)
+{
+	struct it6505 *it6505 = bridge_to_it6505(bridge);
+	struct device *dev = &it6505->client->dev;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "start");
+
+	pm_runtime_get_sync(dev);
+}
+
+static void it6505_bridge_atomic_post_disable(struct drm_bridge *bridge,
+					      struct drm_bridge_state *old_state)
+{
+	struct it6505 *it6505 = bridge_to_it6505(bridge);
+	struct device *dev = &it6505->client->dev;
+
+	DRM_DEV_DEBUG_DRIVER(dev, "start");
+
+	pm_runtime_put_sync(dev);
+}
+
 static enum drm_connector_status
 it6505_bridge_detect(struct drm_bridge *bridge)
 {
···
 	.mode_valid = it6505_bridge_mode_valid,
 	.atomic_enable = it6505_bridge_atomic_enable,
 	.atomic_disable = it6505_bridge_atomic_disable,
+	.atomic_pre_enable = it6505_bridge_atomic_pre_enable,
+	.atomic_post_disable = it6505_bridge_atomic_post_disable,
 	.detect = it6505_bridge_detect,
 	.get_edid = it6505_bridge_get_edid,
 };
···
 	return it6505_poweroff(it6505);
 }
 
-static SIMPLE_DEV_PM_OPS(it6505_bridge_pm_ops, it6505_bridge_suspend,
-			 it6505_bridge_resume);
+static const struct dev_pm_ops it6505_bridge_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(it6505_bridge_suspend, it6505_bridge_resume, NULL)
+};
 
 static int it6505_init_pdata(struct it6505 *it6505)
 {
···
 
 	DRM_DEV_DEBUG_DRIVER(dev, "it6505 device name: %s", dev_name(dev));
 	debugfs_init(it6505);
+	pm_runtime_enable(dev);
 
 	it6505->bridge.funcs = &it6505_bridge_funcs;
 	it6505->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;

drivers/gpu/drm/bridge/parade-ps8640.c

···
 	}
 
 	switch (data & SWAUX_STATUS_MASK) {
-	/* Ignore the DEFER cases as they are already handled in hardware */
 	case SWAUX_STATUS_NACK:
 	case SWAUX_STATUS_I2C_NACK:
 		/*
···
 
 		fallthrough;
 	case SWAUX_STATUS_ACKM:
+		len = data & SWAUX_M_MASK;
+		break;
+	case SWAUX_STATUS_DEFER:
+	case SWAUX_STATUS_I2C_DEFER:
+		if (is_native_aux)
+			msg->reply |= DP_AUX_NATIVE_REPLY_DEFER;
+		else
+			msg->reply |= DP_AUX_I2C_REPLY_DEFER;
 		len = data & SWAUX_M_MASK;
 		break;
 	case SWAUX_STATUS_INVALID:

drivers/gpu/drm/bridge/tc358775.c

···
 		 (val >> 8) & 0xFF, val & 0xFF);
 
 	d2l_write(tc->i2c, SYSRST, SYS_RST_REG | SYS_RST_DSIRX | SYS_RST_BM |
-		  SYS_RST_LCD | SYS_RST_I2CM | SYS_RST_I2CS);
+		  SYS_RST_LCD | SYS_RST_I2CM);
 	usleep_range(30000, 40000);
 
 	d2l_write(tc->i2c, PPI_TX_RX_TA, TTA_GET | TTA_SURE);

drivers/gpu/drm/display/Makefile

···
 obj-$(CONFIG_DRM_DP_AUX_BUS) += drm_dp_aux_bus.o
 
 drm_display_helper-y := drm_display_helper_mod.o
-drm_display_helper-$(CONFIG_DRM_DISPLAY_DP_HELPER) += drm_dp_dual_mode_helper.o \
-						      drm_dp_helper.o \
-						      drm_dp_mst_topology.o \
-						      drm_dsc_helper.o
+drm_display_helper-$(CONFIG_DRM_DISPLAY_DP_HELPER) += \
+	drm_dp_dual_mode_helper.o \
+	drm_dp_helper.o \
+	drm_dp_mst_topology.o \
+	drm_dsc_helper.o
 drm_display_helper-$(CONFIG_DRM_DISPLAY_HDCP_HELPER) += drm_hdcp_helper.o
-drm_display_helper-$(CONFIG_DRM_DISPLAY_HDMI_HELPER) += drm_hdmi_helper.o \
-							drm_scdc_helper.o
+drm_display_helper-$(CONFIG_DRM_DISPLAY_HDMI_HELPER) += \
+	drm_hdmi_helper.o \
+	drm_scdc_helper.o
 drm_display_helper-$(CONFIG_DRM_DP_AUX_CHARDEV) += drm_dp_aux_dev.o
 drm_display_helper-$(CONFIG_DRM_DP_CEC) += drm_dp_cec.o
 

drivers/gpu/drm/drm_atomic_helper.c

···
 EXPORT_SYMBOL(drm_atomic_helper_check_plane_state);
 
 /**
- * drm_atomic_helper_check_crtc_state() - Check CRTC state for validity
+ * drm_atomic_helper_check_crtc_primary_plane() - Check CRTC state for primary plane
  * @crtc_state: CRTC state to check
- * @can_disable_primary_planes: can the CRTC be enabled without a primary plane?
  *
- * Checks that a desired CRTC update is valid. Drivers that provide
- * their own CRTC handling rather than helper-provided implementations may
- * still wish to call this function to avoid duplication of error checking
- * code.
- *
- * Note that @can_disable_primary_planes only tests if the CRTC can be
- * enabled without a primary plane. To test if a primary plane can be updated
- * without a CRTC, use drm_atomic_helper_check_plane_state() in the plane's
- * atomic check.
+ * Checks that a CRTC has at least one primary plane attached to it, which is
+ * a requirement on some hardware. Note that this only involves the CRTC side
+ * of the test. To test if the primary plane is visible or if it can be updated
+ * without the CRTC being enabled, use drm_atomic_helper_check_plane_state() in
+ * the plane's atomic check.
  *
  * RETURNS:
- * Zero if update appears valid, error code on failure
+ * 0 if a primary plane is attached to the CRTC, or an error code otherwise
  */
-int drm_atomic_helper_check_crtc_state(struct drm_crtc_state *crtc_state,
-				       bool can_disable_primary_planes)
+int drm_atomic_helper_check_crtc_primary_plane(struct drm_crtc_state *crtc_state)
 {
-	struct drm_device *dev = crtc_state->crtc->dev;
-	struct drm_atomic_state *state = crtc_state->state;
-
-	if (!crtc_state->enable)
-		return 0;
+	struct drm_crtc *crtc = crtc_state->crtc;
+	struct drm_device *dev = crtc->dev;
+	struct drm_plane *plane;
 
 	/* needs at least one primary plane to be enabled */
-	if (!can_disable_primary_planes) {
-		bool has_primary_plane = false;
-		struct drm_plane *plane;
-
-		drm_for_each_plane_mask(plane, dev, crtc_state->plane_mask) {
-			struct drm_plane_state *plane_state;
-
-			if (plane->type != DRM_PLANE_TYPE_PRIMARY)
-				continue;
-			plane_state = drm_atomic_get_plane_state(state, plane);
-			if (IS_ERR(plane_state))
-				return PTR_ERR(plane_state);
-			if (plane_state->fb && plane_state->crtc) {
-				has_primary_plane = true;
-				break;
-			}
-		}
-		if (!has_primary_plane) {
-			drm_dbg_kms(dev, "Cannot enable CRTC without a primary plane.\n");
-			return -EINVAL;
-		}
+	drm_for_each_plane_mask(plane, dev, crtc_state->plane_mask) {
+		if (plane->type == DRM_PLANE_TYPE_PRIMARY)
+			return 0;
 	}
 
-	return 0;
+	drm_dbg_atomic(dev, "[CRTC:%d:%s] primary plane missing\n", crtc->base.id, crtc->name);
+
+	return -EINVAL;
 }
-EXPORT_SYMBOL(drm_atomic_helper_check_crtc_state);
+EXPORT_SYMBOL(drm_atomic_helper_check_crtc_primary_plane);
 
 /**
  * drm_atomic_helper_check_planes - validate state object for planes changes

drivers/gpu/drm/drm_atomic_state_helper.c

···
 EXPORT_SYMBOL(drm_atomic_helper_connector_reset);
 
 /**
- * drm_atomic_helper_connector_tv_reset - Resets TV connector properties
+ * drm_atomic_helper_connector_tv_margins_reset - Resets TV connector properties
  * @connector: DRM connector
  *
  * Resets the TV-related properties attached to a connector.
  */
-void drm_atomic_helper_connector_tv_reset(struct drm_connector *connector)
+void drm_atomic_helper_connector_tv_margins_reset(struct drm_connector *connector)
 {
 	struct drm_cmdline_mode *cmdline = &connector->cmdline_mode;
 	struct drm_connector_state *state = connector->state;
···
 	state->tv.margins.top = cmdline->tv_margins.top;
 	state->tv.margins.bottom = cmdline->tv_margins.bottom;
 }
-EXPORT_SYMBOL(drm_atomic_helper_connector_tv_reset);
+EXPORT_SYMBOL(drm_atomic_helper_connector_tv_margins_reset);
 
 /**
  * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state

drivers/gpu/drm/drm_atomic_uapi.c

···
 		 */
 		return -EINVAL;
 	} else if (property == config->tv_select_subconnector_property) {
+		state->tv.select_subconnector = val;
+	} else if (property == config->tv_subconnector_property) {
 		state->tv.subconnector = val;
 	} else if (property == config->tv_left_margin_property) {
 		state->tv.margins.left = val;
···
 		else
 			*val = connector->dpms;
 	} else if (property == config->tv_select_subconnector_property) {
+		*val = state->tv.select_subconnector;
+	} else if (property == config->tv_subconnector_property) {
 		*val = state->tv.subconnector;
 	} else if (property == config->tv_left_margin_property) {
 		*val = state->tv.margins.left;

drivers/gpu/drm/drm_client.c

···
 	 * fd_install step out of the driver backend hooks, to make that
 	 * final step optional for internal users.
 	 */
-	ret = drm_gem_vmap(buffer->gem, map);
+	ret = drm_gem_vmap_unlocked(buffer->gem, map);
 	if (ret)
 		return ret;
 
···
 {
 	struct iosys_map *map = &buffer->map;
 
-	drm_gem_vunmap(buffer->gem, map);
+	drm_gem_vunmap_unlocked(buffer->gem, map);
 }
 EXPORT_SYMBOL(drm_client_buffer_vunmap);
 

drivers/gpu/drm/drm_crtc_helper.c

···
 }
 EXPORT_SYMBOL(drm_crtc_helper_set_mode);
 
+/**
+ * drm_crtc_helper_atomic_check() - Helper to check CRTC atomic-state
+ * @crtc: CRTC to check
+ * @state: atomic state object
+ *
+ * Provides a default CRTC-state check handler for CRTCs that only have
+ * one primary plane attached to it.
+ *
+ * This is often the case for the CRTC of simple framebuffers. See also
+ * drm_plane_helper_atomic_check() for the respective plane-state check
+ * helper function.
+ *
+ * RETURNS:
+ * Zero on success, or an errno code otherwise.
+ */
+int drm_crtc_helper_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state)
+{
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+	if (!new_crtc_state->enable)
+		return 0;
+
+	return drm_atomic_helper_check_crtc_primary_plane(new_crtc_state);
+}
+EXPORT_SYMBOL(drm_crtc_helper_atomic_check);
+
 static void
 drm_crtc_helper_disable(struct drm_crtc *crtc)
 {

drivers/gpu/drm/drm_edid.c

···
 	const struct edid *edid;
 };
 
-static bool version_greater(const struct drm_edid *drm_edid,
-			    u8 version, u8 revision)
-{
-	const struct edid *edid = drm_edid->edid;
-
-	return edid->version > version ||
-		(edid->version == version && edid->revision > revision);
-}
-
 static int edid_hfeeodb_extension_block_count(const struct edid *edid);
 
 static int edid_hfeeodb_block_count(const struct edid *edid)
···
 	BUILD_BUG_ON(offsetof(typeof(*descriptor), data.other_data.data.range.formula.cvt.flags) != 15);
 
 	if (descriptor->data.other_data.data.range.flags == DRM_EDID_CVT_SUPPORT_FLAG &&
-	    descriptor->data.other_data.data.range.formula.cvt.flags & 0x10)
+	    descriptor->data.other_data.data.range.formula.cvt.flags & DRM_EDID_CVT_FLAGS_REDUCED_BLANKING)
 		*res = true;
 }
 
···
 
 	BUILD_BUG_ON(offsetof(typeof(*descriptor), data.other_data.data.range.flags) != 10);
 
-	if (descriptor->data.other_data.data.range.flags == 0x02)
+	if (descriptor->data.other_data.data.range.flags == DRM_EDID_SECONDARY_GTF_SUPPORT_FLAG)
 		*res = descriptor;
 }
 
···
 	return descriptor ? descriptor->data.other_data.data.range.formula.gtf2.j : 0;
 }
 
+static void
+get_timing_level(const struct detailed_timing *descriptor, void *data)
+{
+	int *res = data;
+
+	if (!is_display_descriptor(descriptor, EDID_DETAIL_MONITOR_RANGE))
+		return;
+
+	BUILD_BUG_ON(offsetof(typeof(*descriptor), data.other_data.data.range.flags) != 10);
+
+	switch (descriptor->data.other_data.data.range.flags) {
+	case DRM_EDID_DEFAULT_GTF_SUPPORT_FLAG:
+		*res = LEVEL_GTF;
+		break;
+	case DRM_EDID_SECONDARY_GTF_SUPPORT_FLAG:
+		*res = LEVEL_GTF2;
+		break;
+	case DRM_EDID_CVT_SUPPORT_FLAG:
+		*res = LEVEL_CVT;
+		break;
+	default:
+		break;
+	}
+}
+
 /* Get standard timing level (CVT/GTF/DMT). */
 static int standard_timing_level(const struct drm_edid *drm_edid)
 {
 	const struct edid *edid = drm_edid->edid;
 
-	if (edid->revision >= 2) {
-		if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
-			return LEVEL_CVT;
-		if (drm_gtf2_hbreak(drm_edid))
-			return LEVEL_GTF2;
-		if (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)
-			return LEVEL_GTF;
+	if (edid->revision >= 4) {
+		/*
+		 * If the range descriptor doesn't
+		 * indicate otherwise default to CVT
+		 */
+		int ret = LEVEL_CVT;
+
+		drm_for_each_detailed_block(drm_edid, get_timing_level, &ret);
+
+		return ret;
+	} else if (edid->revision >= 3 && drm_gtf2_hbreak(drm_edid)) {
+		return LEVEL_GTF2;
+	} else if (edid->revision >= 2) {
+		return LEVEL_GTF;
+	} else {
+		return LEVEL_DMT;
 	}
-	return LEVEL_DMT;
 }
 
 /*
···
 		return 0;
 
 	return DIV_ROUND_CLOSEST(mode->clock, mode->htotal);
+}
+
+static struct drm_display_mode *
+drm_gtf2_mode(struct drm_device *dev,
+	      const struct drm_edid *drm_edid,
+	      int hsize, int vsize, int vrefresh_rate)
+{
+	struct drm_display_mode *mode;
+
+	/*
+	 * This is potentially wrong if there's ever a monitor with
+	 * more than one ranges section, each claiming a different
+	 * secondary GTF curve.  Please don't do that.
+	 */
+	mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
+	if (!mode)
+		return NULL;
+
+	if (drm_mode_hsync(mode) > drm_gtf2_hbreak(drm_edid)) {
+		drm_mode_destroy(dev, mode);
+		mode = drm_gtf_mode_complex(dev, hsize, vsize,
+					    vrefresh_rate, 0, 0,
+					    drm_gtf2_m(drm_edid),
+					    drm_gtf2_2c(drm_edid),
+					    drm_gtf2_k(drm_edid),
+					    drm_gtf2_2j(drm_edid));
+	}
+
+	return mode;
 }
 
 /*
···
 		mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
 		break;
 	case LEVEL_GTF2:
-		/*
-		 * This is potentially wrong if there's ever a monitor with
-		 * more than one ranges section, each claiming a different
-		 * secondary GTF curve.  Please don't do that.
-		 */
-		mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
-		if (!mode)
-			return NULL;
-		if (drm_mode_hsync(mode) > drm_gtf2_hbreak(drm_edid)) {
-			drm_mode_destroy(dev, mode);
-			mode = drm_gtf_mode_complex(dev, hsize, vsize,
-						    vrefresh_rate, 0, 0,
-						    drm_gtf2_m(drm_edid),
-						    drm_gtf2_2c(drm_edid),
-						    drm_gtf2_k(drm_edid),
-						    drm_gtf2_2j(drm_edid));
-		}
+		mode = drm_gtf2_mode(dev, drm_edid, hsize, vsize, vrefresh_rate);
 		break;
 	case LEVEL_CVT:
 		mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
···
 		return 0;
 
 	/* 1.4 with CVT support gives us real precision, yay */
-	if (edid->revision >= 4 && t[10] == 0x04)
+	if (edid->revision >= 4 && t[10] == DRM_EDID_CVT_SUPPORT_FLAG)
 		return (t[9] * 10000) - ((t[12] >> 2) * 250);
 
 	/* 1.3 is pathetic, so fuzz up a bit */
···
 			return false;
 
 	/* 1.4 max horizontal check */
-	if (edid->revision >= 4 && t[10] == 0x04)
+	if (edid->revision >= 4 && t[10] == DRM_EDID_CVT_SUPPORT_FLAG)
 		if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
 			return false;
 
···
 	return modes;
 }
 
+static int drm_gtf2_modes_for_range(struct drm_connector *connector,
+				    const struct drm_edid *drm_edid,
+				    const struct detailed_timing *timing)
+{
+	int i, modes = 0;
+	struct drm_display_mode *newmode;
+	struct drm_device *dev = connector->dev;
+
+	for (i = 0; i < ARRAY_SIZE(extra_modes); i++) {
+		const struct minimode *m = &extra_modes[i];
+
+		newmode = drm_gtf2_mode(dev, drm_edid, m->w, m->h, m->r);
+		if (!newmode)
+			return modes;
+
+		drm_mode_fixup_1366x768(newmode);
+		if (!mode_in_range(newmode, drm_edid, timing) ||
+		    !valid_inferred_mode(connector, newmode)) {
+			drm_mode_destroy(dev, newmode);
+			continue;
+		}
+
+		drm_mode_probed_add(connector, newmode);
+		modes++;
+	}
+
+	return modes;
+}
+
 static int drm_cvt_modes_for_range(struct drm_connector *connector,
 				   const struct drm_edid *drm_edid,
 				   const struct detailed_timing *timing)
···
 						  closure->drm_edid,
 						  timing);
 
-	if (!version_greater(closure->drm_edid, 1, 1))
+	if (closure->drm_edid->edid->revision < 2)
 		return; /* GTF not defined yet */
 
 	switch (range->flags) {
-	case 0x02: /* secondary gtf, XXX could do more */
-	case 0x00: /* default gtf */
+	case DRM_EDID_SECONDARY_GTF_SUPPORT_FLAG:
+		closure->modes += drm_gtf2_modes_for_range(closure->connector,
+							   closure->drm_edid,
+							   timing);
+		break;
+	case DRM_EDID_DEFAULT_GTF_SUPPORT_FLAG:
 		closure->modes += drm_gtf_modes_for_range(closure->connector,
 							  closure->drm_edid,
 							  timing);
 		break;
-	case 0x04: /* cvt, only in 1.4+ */
-		if (!version_greater(closure->drm_edid, 1, 3))
+	case DRM_EDID_CVT_SUPPORT_FLAG:
+		if (closure->drm_edid->edid->revision < 4)
 			break;
 
 		closure->modes += drm_cvt_modes_for_range(closure->connector,
 							  closure->drm_edid,
 							  timing);
 		break;
-	case 0x01: /* just the ranges, no formula */
+	case DRM_EDID_RANGE_LIMITS_ONLY_FLAG:
 	default:
 		break;
 	}
···
 		.drm_edid = drm_edid,
 	};
 
-	if (version_greater(drm_edid, 1, 0))
+	if (drm_edid->edid->revision >= 1)
 		drm_for_each_detailed_block(drm_edid, do_inferred_modes, &closure);
 
 	return closure.modes;
···
 		}
 	}
 
-	if (version_greater(drm_edid, 1, 0))
+	if (edid->revision >= 1)
 		drm_for_each_detailed_block(drm_edid, do_established_modes,
 					    &closure);
 
···
 		}
 	}
 
-	if (version_greater(drm_edid, 1, 0))
+	if (drm_edid->edid->revision >= 1)
 		drm_for_each_detailed_block(drm_edid, do_standard_modes,
 					    &closure);
 
···
 		.drm_edid = drm_edid,
 	};
 
-	if (version_greater(drm_edid, 1, 2))
+	if (drm_edid->edid->revision >= 3)
 		drm_for_each_detailed_block(drm_edid, do_cvt_mode, &closure);
 
 	/* XXX should also look for CVT codes in VTB blocks */
···
 	struct detailed_mode_closure closure = {
 		.connector = connector,
 		.drm_edid = drm_edid,
-		.preferred = true,
 		.quirks = quirks,
 	};
 
-	if (closure.preferred && !version_greater(drm_edid, 1, 3))
+	if (drm_edid->edid->revision >= 4)
+		closure.preferred = true; /* first detailed timing is always preferred */
+	else
 		closure.preferred =
-		    (drm_edid->edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
+			drm_edid->edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING;
 
 	drm_for_each_detailed_block(drm_edid, do_detailed_mode, &closure);
 
···
 	hdmi->y420_dc_modes = dc_mask;
 }
 
+static void drm_parse_dsc_info(struct drm_hdmi_dsc_cap *hdmi_dsc,
+			       const u8 *hf_scds)
+{
+	hdmi_dsc->v_1p2 = hf_scds[11] & DRM_EDID_DSC_1P2;
+
+	if (!hdmi_dsc->v_1p2)
+		return;
+
+	hdmi_dsc->native_420 = hf_scds[11] & DRM_EDID_DSC_NATIVE_420;
+	hdmi_dsc->all_bpp = hf_scds[11] & DRM_EDID_DSC_ALL_BPP;
+
+	if (hf_scds[11] & DRM_EDID_DSC_16BPC)
+		hdmi_dsc->bpc_supported = 16;
+	else if (hf_scds[11] & DRM_EDID_DSC_12BPC)
+		hdmi_dsc->bpc_supported = 12;
+	else if (hf_scds[11] & DRM_EDID_DSC_10BPC)
+		hdmi_dsc->bpc_supported = 10;
+	else
+		/* Supports min 8 BPC if DSC 1.2 is supported*/
+		hdmi_dsc->bpc_supported = 8;
+
+	if (cea_db_payload_len(hf_scds) >= 12 && hf_scds[12]) {
+		u8 dsc_max_slices;
+		u8 dsc_max_frl_rate;
+
+		dsc_max_frl_rate = (hf_scds[12] & DRM_EDID_DSC_MAX_FRL_RATE_MASK) >> 4;
+		drm_get_max_frl_rate(dsc_max_frl_rate, &hdmi_dsc->max_lanes,
+				     &hdmi_dsc->max_frl_rate_per_lane);
+
+		dsc_max_slices = hf_scds[12] & DRM_EDID_DSC_MAX_SLICES;
+
+		switch (dsc_max_slices) {
+		case 1:
+			hdmi_dsc->max_slices = 1;
+			hdmi_dsc->clk_per_slice = 340;
+			break;
+		case 2:
+			hdmi_dsc->max_slices = 2;
+			hdmi_dsc->clk_per_slice = 340;
+			break;
+		case 3:
+			hdmi_dsc->max_slices = 4;
+			hdmi_dsc->clk_per_slice = 340;
+			break;
+		case 4:
+			hdmi_dsc->max_slices = 8;
+			hdmi_dsc->clk_per_slice = 340;
+			break;
+		case 5:
+			hdmi_dsc->max_slices = 8;
+			hdmi_dsc->clk_per_slice = 400;
+			break;
+		case 6:
+			hdmi_dsc->max_slices = 12;
+			hdmi_dsc->clk_per_slice = 400;
+			break;
+		case 7:
+			hdmi_dsc->max_slices = 16;
+			hdmi_dsc->clk_per_slice = 400;
+			break;
+		case 0:
+		default:
+			hdmi_dsc->max_slices = 0;
+			hdmi_dsc->clk_per_slice = 0;
+		}
+	}
+
+	if (cea_db_payload_len(hf_scds) >= 13 && hf_scds[13])
+		hdmi_dsc->total_chunk_kbytes = hf_scds[13] & DRM_EDID_DSC_TOTAL_CHUNK_KBYTES;
+}
+
 /* Sink Capability Data Structure */
 static void drm_parse_hdmi_forum_scds(struct drm_connector *connector,
 				      const u8 *hf_scds)
 {
 	struct drm_display_info *display = &connector->display_info;
 	struct drm_hdmi_info *hdmi = &display->hdmi;
+	struct drm_hdmi_dsc_cap *hdmi_dsc = &hdmi->dsc_cap;
+	int max_tmds_clock = 0;
+	u8 max_frl_rate = 0;
+	bool dsc_support = false;
 
 	display->has_hdmi_infoframe = true;
 
···
 	 */
 
 	if (hf_scds[5]) {
-		/* max clock is 5000 KHz times block value */
-		u32 max_tmds_clock = hf_scds[5] * 5000;
 		struct drm_scdc *scdc = &hdmi->scdc;
+
+		/* max clock is 5000 KHz times block value */
+		max_tmds_clock = hf_scds[5] * 5000;
 
 		if (max_tmds_clock > 340000) {
 			display->max_tmds_clock = max_tmds_clock;
-			DRM_DEBUG_KMS("HF-VSDB: max TMDS clock %d kHz\n",
-				display->max_tmds_clock);
 		}
 
 		if (scdc->supported) {
···
 	}
 
 	if (hf_scds[7]) {
-		u8 max_frl_rate;
-		u8 dsc_max_frl_rate;
-		u8 dsc_max_slices;
-		struct drm_hdmi_dsc_cap *hdmi_dsc = &hdmi->dsc_cap;
-
-		DRM_DEBUG_KMS("hdmi_21 sink detected. parsing edid\n");
 		max_frl_rate = (hf_scds[7] & DRM_EDID_MAX_FRL_RATE_MASK) >> 4;
 		drm_get_max_frl_rate(max_frl_rate, &hdmi->max_lanes,
 				     &hdmi->max_frl_rate_per_lane);
-		hdmi_dsc->v_1p2 = hf_scds[11] & DRM_EDID_DSC_1P2;
-
-		if (hdmi_dsc->v_1p2) {
-			hdmi_dsc->native_420 = hf_scds[11] & DRM_EDID_DSC_NATIVE_420;
-			hdmi_dsc->all_bpp = hf_scds[11] & DRM_EDID_DSC_ALL_BPP;
-
-			if (hf_scds[11] & DRM_EDID_DSC_16BPC)
-				hdmi_dsc->bpc_supported = 16;
-			else if (hf_scds[11] & DRM_EDID_DSC_12BPC)
-				hdmi_dsc->bpc_supported = 12;
-			else if (hf_scds[11] & DRM_EDID_DSC_10BPC)
-				hdmi_dsc->bpc_supported = 10;
-			else
-				hdmi_dsc->bpc_supported = 0;
-
-			dsc_max_frl_rate = (hf_scds[12] & DRM_EDID_DSC_MAX_FRL_RATE_MASK) >> 4;
-			drm_get_max_frl_rate(dsc_max_frl_rate, &hdmi_dsc->max_lanes,
-					     &hdmi_dsc->max_frl_rate_per_lane);
-			hdmi_dsc->total_chunk_kbytes = hf_scds[13] & DRM_EDID_DSC_TOTAL_CHUNK_KBYTES;
-
-			dsc_max_slices = hf_scds[12] & DRM_EDID_DSC_MAX_SLICES;
-			switch (dsc_max_slices) {
-			case 1:
-				hdmi_dsc->max_slices = 1;
-				hdmi_dsc->clk_per_slice = 340;
-				break;
-			case 2:
-				hdmi_dsc->max_slices = 2;
-				hdmi_dsc->clk_per_slice = 340;
-				break;
-			case 3:
-				hdmi_dsc->max_slices = 4;
-				hdmi_dsc->clk_per_slice = 340;
-				break;
-			case 4:
-				hdmi_dsc->max_slices = 8;
-				hdmi_dsc->clk_per_slice = 340;
-				break;
-			case 5:
-				hdmi_dsc->max_slices = 8;
-				hdmi_dsc->clk_per_slice = 400;
-				break;
-			case 6:
-				hdmi_dsc->max_slices = 12;
-				hdmi_dsc->clk_per_slice = 400;
-				break;
-			case 7:
-				hdmi_dsc->max_slices = 16;
-				hdmi_dsc->clk_per_slice = 400;
-				break;
-			case 0:
-			default:
-				hdmi_dsc->max_slices = 0;
-				hdmi_dsc->clk_per_slice = 0;
-			}
-		}
 	}
 
 	drm_parse_ycbcr420_deep_color_info(connector, hf_scds);
+
+	if (cea_db_payload_len(hf_scds) >= 11 && hf_scds[11]) {
+		drm_parse_dsc_info(hdmi_dsc, hf_scds);
+		dsc_support = true;
+	}
+
+	drm_dbg_kms(connector->dev,
+		    "HF-VSDB: max TMDS clock: %d KHz, HDMI 2.1 support: %s, DSC 1.2 support: %s\n",
+		    max_tmds_clock, str_yes_no(max_frl_rate), str_yes_no(dsc_support));
 }
 
 static void drm_parse_hdmi_deep_color_info(struct drm_connector *connector,
···
 		return;
 
 	/*
-	 * Check for flag range limits only. If flag == 1 then
-	 * no additional timing information provided.
-	 * Default GTF, GTF Secondary curve and CVT are not
-	 * supported
+	 * These limits are used to determine the VRR refresh
+	 * rate range. Only the "range limits only" variant
+	 * of the range descriptor seems to guarantee that
+	 * any and all timings are accepted by the sink, as
+	 * opposed to just timings conforming to the indicated
+	 * formula (GTF/GTF2/CVT). Thus other variants of the
+	 * range descriptor are not accepted here.
 	 */
 	if (range->flags != DRM_EDID_RANGE_LIMITS_ONLY_FLAG)
 		return;
···
 		.drm_edid = drm_edid,
 	};
 
-	if (!version_greater(drm_edid, 1, 1))
+	if (drm_edid->edid->revision < 4)
+		return;
+
+	if (!(drm_edid->edid->features & DRM_EDID_FEATURE_CONTINUOUS_FREQ))
 		return;
 
 	drm_for_each_detailed_block(drm_edid, get_monitor_range, &closure);
···
 	num_modes += add_cea_modes(connector, drm_edid);
 	num_modes += add_alternate_cea_modes(connector, drm_edid);
 	num_modes += add_displayid_detailed_modes(connector, drm_edid);
-	if (drm_edid->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)
+	if (drm_edid->edid->features & DRM_EDID_FEATURE_CONTINUOUS_FREQ)
 		num_modes += add_inferred_modes(connector, drm_edid);
 
 	if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
···
 	 * by non-zero YQ when receiving RGB. There doesn't seem to be any
 	 * good way to tell which version of CEA-861 the sink supports, so
 	 * we limit non-zero YQ to HDMI 2.0 sinks only as HDMI 2.0 is based
-	 * on on CEA-861-F.
+	 * on CEA-861-F.
 	 */
 	if (!is_hdmi2_sink(connector) ||
 	    rgb_quant_range == HDMI_QUANTIZATION_RANGE_LIMITED)

drivers/gpu/drm/drm_format_helper.c

···
 			drm_fb_xrgb8888_to_rgb565(dst, dst_pitch, src, fb, clip, false);
 			return 0;
 		}
+	} else if (dst_format == (DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN)) {
+		if (fb_format == DRM_FORMAT_RGB565) {
+			drm_fb_swab(dst, dst_pitch, src, fb, clip, false);
+			return 0;
+		}
 	} else if (dst_format == DRM_FORMAT_RGB888) {
 		if (fb_format == DRM_FORMAT_XRGB8888) {
 			drm_fb_xrgb8888_to_rgb888(dst, dst_pitch, src, fb, clip);
···
 	} else if (dst_format == DRM_FORMAT_XRGB2101010) {
 		if (fb_format == DRM_FORMAT_XRGB8888) {
 			drm_fb_xrgb8888_to_xrgb2101010(dst, dst_pitch, src, fb, clip);
+			return 0;
+		}
+	} else if (dst_format == DRM_FORMAT_BGRX8888) {
+		if (fb_format == DRM_FORMAT_XRGB8888) {
+			drm_fb_swab(dst, dst_pitch, src, fb, clip, false);
 			return 0;
 		}
 	}

drivers/gpu/drm/drm_gem.c

···
 {
 	int ret;
 
+	dma_resv_assert_held(obj->resv);
+
 	if (!obj->funcs->vmap)
 		return -EOPNOTSUPP;
 
···
 
 void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
 {
+	dma_resv_assert_held(obj->resv);
+
 	if (iosys_map_is_null(map))
 		return;
 
···
 	iosys_map_clear(map);
 }
 EXPORT_SYMBOL(drm_gem_vunmap);
+
+int drm_gem_vmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map)
+{
+	int ret;
+
+	dma_resv_lock(obj->resv, NULL);
+	ret = drm_gem_vmap(obj, map);
+	dma_resv_unlock(obj->resv);
+
+	return ret;
+}
+EXPORT_SYMBOL(drm_gem_vmap_unlocked);
+
+void drm_gem_vunmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map)
+{
+	dma_resv_lock(obj->resv, NULL);
+	drm_gem_vunmap(obj, map);
+	dma_resv_unlock(obj->resv);
+}
+EXPORT_SYMBOL(drm_gem_vunmap_unlocked);
 
 /**
  * drm_gem_lock_reservations - Sets up the ww context and acquires

drivers/gpu/drm/drm_gem_dma_helper.c

···
 
 	if (gem_obj->import_attach) {
 		if (dma_obj->vaddr)
-			dma_buf_vunmap(gem_obj->import_attach->dmabuf, &map);
+			dma_buf_vunmap_unlocked(gem_obj->import_attach->dmabuf, &map);
 		drm_prime_gem_destroy(gem_obj, dma_obj->sgt);
 	} else if (dma_obj->vaddr) {
 		if (dma_obj->map_noncoherent)
···
 	struct iosys_map map;
 	int ret;
 
-	ret = dma_buf_vmap(attach->dmabuf, &map);
+	ret = dma_buf_vmap_unlocked(attach->dmabuf, &map);
 	if (ret) {
 		DRM_ERROR("Failed to vmap PRIME buffer\n");
 		return ERR_PTR(ret);
···
 
 	obj = drm_gem_dma_prime_import_sg_table(dev, attach, sgt);
 	if (IS_ERR(obj)) {
-		dma_buf_vunmap(attach->dmabuf, &map);
+		dma_buf_vunmap_unlocked(attach->dmabuf, &map);
 		return obj;
 	}
 

drivers/gpu/drm/drm_gem_framebuffer_helper.c

···
 			ret = -EINVAL;
 			goto err_drm_gem_vunmap;
 		}
-		ret = drm_gem_vmap(obj, &map[i]);
+		ret = drm_gem_vmap_unlocked(obj, &map[i]);
 		if (ret)
 			goto err_drm_gem_vunmap;
 	}
···
 		obj = drm_gem_fb_get_obj(fb, i);
 		if (!obj)
 			continue;
-		drm_gem_vunmap(obj, &map[i]);
+		drm_gem_vunmap_unlocked(obj, &map[i]);
 	}
 	return ret;
 }
···
 			continue;
 		if (iosys_map_is_null(&map[i]))
 			continue;
-		drm_gem_vunmap(obj, &map[i]);
+		drm_gem_vunmap_unlocked(obj, &map[i]);
 	}
 }
 EXPORT_SYMBOL(drm_gem_fb_vunmap);

drivers/gpu/drm/drm_gem_ttm_helper.c

···
 		     struct iosys_map *map)
 {
 	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
-	int ret;
 
-	dma_resv_lock(gem->resv, NULL);
-	ret = ttm_bo_vmap(bo, map);
-	dma_resv_unlock(gem->resv);
-
-	return ret;
+	return ttm_bo_vmap(bo, map);
 }
 EXPORT_SYMBOL(drm_gem_ttm_vmap);
 
···
 {
 	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
 
-	dma_resv_lock(gem->resv, NULL);
 	ttm_bo_vunmap(bo, map);
-	dma_resv_unlock(gem->resv);
 }
 EXPORT_SYMBOL(drm_gem_ttm_vunmap);
 

drivers/gpu/drm/drm_modes.c

···
 
 	name = mode_option;
 
-	/* Try to locate the bpp and refresh specifiers, if any */
-	bpp_ptr = strchr(name, '-');
-	if (bpp_ptr)
-		bpp_off = bpp_ptr - name;
-
-	refresh_ptr = strchr(name, '@');
-	if (refresh_ptr)
-		refresh_off = refresh_ptr - name;
-
 	/* Locate the start of named options */
 	options_ptr = strchr(name, ',');
 	if (options_ptr)
 		options_off = options_ptr - name;
+	else
+		options_off = strlen(name);
+
+	/* Try to locate the bpp and refresh specifiers, if any */
+	bpp_ptr = strnchr(name, options_off, '-');
+	while (bpp_ptr && !isdigit(bpp_ptr[1]))
+		bpp_ptr = strnchr(bpp_ptr + 1, options_off, '-');
+	if (bpp_ptr)
+		bpp_off = bpp_ptr - name;
+
+	refresh_ptr = strnchr(name, options_off, '@');
+	if (refresh_ptr)
+		refresh_off = refresh_ptr - name;
 
 	/* Locate the end of the name / resolution, and parse it */
 	if (bpp_ptr) {

drivers/gpu/drm/drm_plane_helper.c

···
  * scale and positioning are not expected to change since the plane is always
  * a fullscreen scanout buffer.
  *
- * This is often the case for the primary plane of simple framebuffers.
+ * This is often the case for the primary plane of simple framebuffers. See
+ * also drm_crtc_helper_atomic_check() for the respective CRTC-state check
+ * helper function.
  *
  * RETURNS:
  * Zero on success, or an errno code otherwise.

drivers/gpu/drm/drm_prime.c

···
 
 	get_dma_buf(dma_buf);
 
-	sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
+	sgt = dma_buf_map_attachment_unlocked(attach, DMA_BIDIRECTIONAL);
 	if (IS_ERR(sgt)) {
 		ret = PTR_ERR(sgt);
 		goto fail_detach;
···
 	return obj;
 
 fail_unmap:
-	dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL);
+	dma_buf_unmap_attachment_unlocked(attach, sgt, DMA_BIDIRECTIONAL);
 fail_detach:
 	dma_buf_detach(dma_buf, attach);
 	dma_buf_put(dma_buf);
···
 
 	attach = obj->import_attach;
 	if (sg)
-		dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL);
+		dma_buf_unmap_attachment_unlocked(attach, sg, DMA_BIDIRECTIONAL);
 	dma_buf = attach->dmabuf;
 	dma_buf_detach(attach->dmabuf, attach);
 	/* remove the reference */

drivers/gpu/drm/drm_simple_kms_helper.c

···
 	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
 	int ret;
 
-	ret = drm_atomic_helper_check_crtc_state(crtc_state, false);
+	if (!crtc_state->enable)
+		goto out;
+
+	ret = drm_atomic_helper_check_crtc_primary_plane(crtc_state);
 	if (ret)
 		return ret;
 
+out:
 	return drm_atomic_add_affected_planes(state, crtc);
 }
 

drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c

···
 	struct iosys_map map = IOSYS_MAP_INIT_VADDR(etnaviv_obj->vaddr);
 
 	if (etnaviv_obj->vaddr)
-		dma_buf_vunmap(etnaviv_obj->base.import_attach->dmabuf, &map);
+		dma_buf_vunmap_unlocked(etnaviv_obj->base.import_attach->dmabuf, &map);
 
 	/* Don't drop the pages for imported dmabuf, as they are not
 	 * ours, just free the array we allocated:

drivers/gpu/drm/gma500/framebuffer.c

···
 
 	info->fbops = &psbfb_unaccel_ops;
 
-	info->fix.smem_start = dev->mode_config.fb_base;
+	info->fix.smem_start = dev_priv->fb_base;
 	info->fix.smem_len = size;
 	info->fix.ywrapstep = 0;
 	info->fix.ypanstep = 0;
···
 	info->screen_size = size;
 
 	if (dev_priv->gtt.stolen_size) {
-		info->apertures->ranges[0].base = dev->mode_config.fb_base;
+		info->apertures->ranges[0].base = dev_priv->fb_base;
 		info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
 	}
 
···
 
 	/* set memory base */
 	/* Oaktrail and Poulsbo should use BAR 2*/
-	pci_read_config_dword(pdev, PSB_BSM, (u32 *)&(dev->mode_config.fb_base));
+	pci_read_config_dword(pdev, PSB_BSM, (u32 *)&(dev_priv->fb_base));
 
 	/* num pipes is 2 for PSB but 1 for Mrst */
 	for (i = 0; i < dev_priv->num_pipe; i++)

drivers/gpu/drm/gma500/psb_drv.h

···
 	uint32_t blc_adj2;
 
 	struct drm_fb_helper *fb_helper;
+	resource_size_t fb_base;
 
 	bool dsr_enable;
 	u32 dsr_fb_update;

drivers/gpu/drm/gud/gud_connector.c

···
 	drm_atomic_helper_connector_reset(connector);
 	connector->state->tv = gconn->initial_tv_state;
 	/* Set margins from command line */
-	drm_atomic_helper_connector_tv_reset(connector);
+	drm_atomic_helper_connector_tv_margins_reset(connector);
 	if (gconn->initial_brightness >= 0)
 		connector->state->tv.brightness = gconn->initial_brightness;
 }

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c

···
 	dev->mode_config.max_width = 1920;
 	dev->mode_config.max_height = 1200;
 
-	dev->mode_config.fb_base = priv->fb_base;
 	dev->mode_config.preferred_depth = 32;
 	dev->mode_config.prefer_shadow = 1;
 
···
 {
 	struct drm_device *dev = &priv->dev;
 	struct pci_dev *pdev = to_pci_dev(dev->dev);
-	resource_size_t addr, size, ioaddr, iosize;
+	resource_size_t ioaddr, iosize;
 
 	ioaddr = pci_resource_start(pdev, 1);
 	iosize = pci_resource_len(pdev, 1);
···
 		drm_err(dev, "Cannot map mmio region\n");
 		return -ENOMEM;
 	}
-
-	addr = pci_resource_start(pdev, 0);
-	size = pci_resource_len(pdev, 0);
-	priv->fb_map = devm_ioremap(dev->dev, addr, size);
-	if (!priv->fb_map) {
-		drm_err(dev, "Cannot map framebuffer\n");
-		return -ENOMEM;
-	}
-	priv->fb_base = addr;
-	priv->fb_size = size;
 
 	return 0;
 }
···
 	if (ret)
 		goto err;
 
-	ret = drmm_vram_helper_init(dev, pci_resource_start(pdev, 0), priv->fb_size);
+	ret = drmm_vram_helper_init(dev, pci_resource_start(pdev, 0),
+				    pci_resource_len(pdev, 0));
 	if (ret) {
 		drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
 		goto err;

drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h

···
 struct hibmc_drm_private {
 	/* hw */
 	void __iomem   *mmio;
-	void __iomem   *fb_map;
-	resource_size_t  fb_base;
-	resource_size_t  fb_size;
 
 	/* drm */
 	struct drm_device dev;

drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c

···
 	struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf);
 	void *vaddr;
 
-	vaddr = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB);
+	vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);
 	if (IS_ERR(vaddr))
 		return PTR_ERR(vaddr);
 

drivers/gpu/drm/i915/gem/i915_gem_object.c

···
 	__i915_gem_object_free_mmaps(obj);
 
 	atomic_set(&obj->mm.pages_pin_count, 0);
+
+	/*
+	 * dma_buf_unmap_attachment() requires reservation to be
+	 * locked. The imported GEM shouldn't share reservation lock
+	 * and ttm_bo_cleanup_memtype_use() shouldn't be invoked for
+	 * dma-buf, so it's safe to take the lock.
+	 */
+	if (obj->base.import_attach)
+		i915_gem_object_lock(obj, NULL);
+
 	__i915_gem_object_put_pages(obj);
+
+	if (obj->base.import_attach)
+		i915_gem_object_unlock(obj);
+
 	GEM_BUG_ON(i915_gem_object_has_pages(obj));
 }
 

drivers/gpu/drm/i915/gem/selftests/i915_gem_dmabuf.c

···
 		goto out_import;
 	}
 
-	st = dma_buf_map_attachment(import_attach, DMA_BIDIRECTIONAL);
+	st = dma_buf_map_attachment_unlocked(import_attach, DMA_BIDIRECTIONAL);
 	if (IS_ERR(st)) {
 		err = PTR_ERR(st);
 		goto out_detach;
···
 		timeout = -ETIME;
 	}
 	err = timeout > 0 ? 0 : timeout;
-	dma_buf_unmap_attachment(import_attach, st, DMA_BIDIRECTIONAL);
+	dma_buf_unmap_attachment_unlocked(import_attach, st, DMA_BIDIRECTIONAL);
 out_detach:
 	dma_buf_detach(dmabuf, import_attach);
 out_import:
···
 		goto out_obj;
 	}
 
-	err = dma_buf_vmap(dmabuf, &map);
+	err = dma_buf_vmap_unlocked(dmabuf, &map);
 	dma_map = err ? NULL : map.vaddr;
 	if (!dma_map) {
 		pr_err("dma_buf_vmap failed\n");
···
 
 	err = 0;
 out_dma_map:
-	dma_buf_vunmap(dmabuf, &map);
+	dma_buf_vunmap_unlocked(dmabuf, &map);
 out_obj:
 	i915_gem_object_put(obj);
 out_dmabuf:
···
 	if (IS_ERR(dmabuf))
 		return PTR_ERR(dmabuf);
 
-	err = dma_buf_vmap(dmabuf, &map);
+	err = dma_buf_vmap_unlocked(dmabuf, &map);
 	ptr = err ? NULL : map.vaddr;
 	if (!ptr) {
 		pr_err("dma_buf_vmap failed\n");
···
 	}
 
 	memset(ptr, 0xc5, PAGE_SIZE);
-	dma_buf_vunmap(dmabuf, &map);
+	dma_buf_vunmap_unlocked(dmabuf, &map);
 
 	obj = to_intel_bo(i915_gem_prime_import(&i915->drm, dmabuf));
 	if (IS_ERR(obj)) {
···
 	}
 	i915_gem_object_put(obj);
 
-	err = dma_buf_vmap(dmabuf, &map);
+	err = dma_buf_vmap_unlocked(dmabuf, &map);
 	ptr = err ? NULL : map.vaddr;
 	if (!ptr) {
 		pr_err("dma_buf_vmap failed\n");
···
 	memset(ptr, 0xc5, dmabuf->size);
 
 	err = 0;
-	dma_buf_vunmap(dmabuf, &map);
+	dma_buf_vunmap_unlocked(dmabuf, &map);
 out:
 	dma_buf_put(dmabuf);
 	return err;

drivers/gpu/drm/lima/lima_sched.c

···
 		} else {
 			buffer_chunk->size = lima_bo_size(bo);
 
-			ret = drm_gem_shmem_vmap(&bo->base, &map);
+			ret = drm_gem_vmap_unlocked(&bo->base.base, &map);
 			if (ret) {
 				kvfree(et);
 				goto out;
···
 
 			memcpy(buffer_chunk + 1, map.vaddr, buffer_chunk->size);
 
-			drm_gem_shmem_vunmap(&bo->base, &map);
+			drm_gem_vunmap_unlocked(&bo->base.base, &map);
 		}
 
 		buffer_chunk = (void *)(buffer_chunk + 1) + buffer_chunk->size;

drivers/gpu/drm/mgag200/mgag200_g200se.c

···
 	pixpllcp = pixpllc->p - 1;
 	pixpllcs = pixpllc->s;
 
-	xpixpllcm = pixpllcm | ((pixpllcn & BIT(8)) >> 1);
+	// For G200SE A, BIT(7) should be set unconditionally.
+	xpixpllcm = BIT(7) | pixpllcm;
 	xpixpllcn = pixpllcn;
 	xpixpllcp = (pixpllcs << 3) | pixpllcp;
 

drivers/gpu/drm/mgag200/mgag200_mode.c

···
 	struct drm_property_blob *new_gamma_lut = new_crtc_state->gamma_lut;
 	int ret;
 
-	ret = drm_atomic_helper_check_crtc_state(new_crtc_state, false);
-	if (ret)
-		return ret;
-
 	if (!new_crtc_state->enable)
 		return 0;
+
+	ret = drm_atomic_helper_check_crtc_primary_plane(new_crtc_state);
+	if (ret)
+		return ret;
 
 	if (new_crtc_state->mode_changed) {
 		if (funcs->pixpllc_atomic_check) {
···
 		}
 	}
 
-	return drm_atomic_add_affected_planes(new_state, crtc);
+	return 0;
 }
 
 void mgag200_crtc_helper_atomic_flush(struct drm_crtc *crtc, struct drm_atomic_state *old_state)
···
 	dev->mode_config.max_width = MGAG200_MAX_FB_WIDTH;
 	dev->mode_config.max_height = MGAG200_MAX_FB_HEIGHT;
 	dev->mode_config.preferred_depth = 24;
-	dev->mode_config.fb_base = mdev->vram_res->start;
 	dev->mode_config.funcs = &mgag200_mode_config_funcs;
 	dev->mode_config.helper_private = &mgag200_mode_config_helper_funcs;
 

drivers/gpu/drm/msm/msm_fbdev.c

···
 
 	drm_fb_helper_fill_info(fbi, helper, sizes);
 
-	dev->mode_config.fb_base = paddr;
-
 	fbi->screen_base = msm_gem_get_vaddr(bo);
 	if (IS_ERR(fbi->screen_base)) {
 		ret = PTR_ERR(fbi->screen_base);

drivers/gpu/drm/mxsfb/lcdif_kms.c

···
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_bridge.h>
+#include <drm/drm_color_mgmt.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_encoder.h>
 #include <drm/drm_fb_dma_helper.h>
···
 /* -----------------------------------------------------------------------------
  * CRTC
  */
+
+/*
+ * For conversion from YCbCr to RGB, the CSC operates as follows:
+ *
+ * |R|   |A1 A2 A3|   |Y  + D1|
+ * |G| = |B1 B2 B3| * |Cb + D2|
+ * |B|   |C1 C2 C3|   |Cr + D3|
+ *
+ * The A, B and C coefficients are expressed as Q2.8 fixed point values, and
+ * the D coefficients as Q0.8. Despite the reference manual stating the
+ * opposite, the D1, D2 and D3 offset values are added to Y, Cb and Cr, not
+ * subtracted. They must thus be programmed with negative values.
+ */
+static const u32 lcdif_yuv2rgb_coeffs[3][2][6] = {
+	[DRM_COLOR_YCBCR_BT601] = {
+		[DRM_COLOR_YCBCR_LIMITED_RANGE] = {
+			/*
+			 * BT.601 limited range:
+			 *
+			 * |R|   |1.1644  0.0000  1.5960|   |Y  - 16 |
+			 * |G| = |1.1644 -0.3917 -0.8129| * |Cb - 128|
+			 * |B|   |1.1644  2.0172  0.0000|   |Cr - 128|
+			 */
+			CSC0_COEF0_A1(0x12a) | CSC0_COEF0_A2(0x000),
+			CSC0_COEF1_A3(0x199) | CSC0_COEF1_B1(0x12a),
+			CSC0_COEF2_B2(0x79c) | CSC0_COEF2_B3(0x730),
+			CSC0_COEF3_C1(0x12a) | CSC0_COEF3_C2(0x204),
+			CSC0_COEF4_C3(0x000) | CSC0_COEF4_D1(0x1f0),
+			CSC0_COEF5_D2(0x180) | CSC0_COEF5_D3(0x180),
+		},
+		[DRM_COLOR_YCBCR_FULL_RANGE] = {
+			/*
+			 * BT.601 full range:
+			 *
+			 * |R|   |1.0000  0.0000  1.4020|   |Y  - 0  |
+			 * |G| = |1.0000 -0.3441 -0.7141| * |Cb - 128|
+			 * |B|   |1.0000  1.7720  0.0000|   |Cr - 128|
+			 */
+			CSC0_COEF0_A1(0x100) | CSC0_COEF0_A2(0x000),
+			CSC0_COEF1_A3(0x167) | CSC0_COEF1_B1(0x100),
+			CSC0_COEF2_B2(0x7a8) | CSC0_COEF2_B3(0x749),
+			CSC0_COEF3_C1(0x100) | CSC0_COEF3_C2(0x1c6),
+			CSC0_COEF4_C3(0x000) | CSC0_COEF4_D1(0x000),
+			CSC0_COEF5_D2(0x180) | CSC0_COEF5_D3(0x180),
+		},
+	},
+	[DRM_COLOR_YCBCR_BT709] = {
+		[DRM_COLOR_YCBCR_LIMITED_RANGE] = {
+			/*
+			 * Rec.709 limited range:
+			 *
+			 * |R|   |1.1644  0.0000  1.7927|   |Y  - 16 |
+			 * |G| = |1.1644 -0.2132 -0.5329| * |Cb - 128|
+			 * |B|   |1.1644  2.1124  0.0000|   |Cr - 128|
+			 */
+			CSC0_COEF0_A1(0x12a) | CSC0_COEF0_A2(0x000),
+			CSC0_COEF1_A3(0x1cb) | CSC0_COEF1_B1(0x12a),
+			CSC0_COEF2_B2(0x7c9) | CSC0_COEF2_B3(0x778),
+			CSC0_COEF3_C1(0x12a) | CSC0_COEF3_C2(0x21d),
+			CSC0_COEF4_C3(0x000) | CSC0_COEF4_D1(0x1f0),
+			CSC0_COEF5_D2(0x180) | CSC0_COEF5_D3(0x180),
+		},
+		[DRM_COLOR_YCBCR_FULL_RANGE] = {
+			/*
+			 * Rec.709 full range:
+			 *
+			 * |R|   |1.0000  0.0000  1.5748|   |Y  - 0  |
+			 * |G| = |1.0000 -0.1873 -0.4681| * |Cb - 128|
+			 * |B|   |1.0000  1.8556  0.0000|   |Cr - 128|
+			 */
+			CSC0_COEF0_A1(0x100) | CSC0_COEF0_A2(0x000),
+			CSC0_COEF1_A3(0x193) | CSC0_COEF1_B1(0x100),
+			CSC0_COEF2_B2(0x7d0) | CSC0_COEF2_B3(0x788),
+			CSC0_COEF3_C1(0x100) | CSC0_COEF3_C2(0x1db),
+			CSC0_COEF4_C3(0x000) | CSC0_COEF4_D1(0x000),
+			CSC0_COEF5_D2(0x180) | CSC0_COEF5_D3(0x180),
+		},
+	},
+	[DRM_COLOR_YCBCR_BT2020] = {
+		[DRM_COLOR_YCBCR_LIMITED_RANGE] = {
+			/*
+			 * BT.2020 limited range:
+			 *
+			 * |R|   |1.1644  0.0000  1.6787|   |Y  - 16 |
+			 * |G| = |1.1644 -0.1874 -0.6505| * |Cb - 128|
+			 * |B|   |1.1644  2.1418  0.0000|   |Cr - 128|
+			 */
+			CSC0_COEF0_A1(0x12a) | CSC0_COEF0_A2(0x000),
+			CSC0_COEF1_A3(0x1ae) | CSC0_COEF1_B1(0x12a),
+			CSC0_COEF2_B2(0x7d0) | CSC0_COEF2_B3(0x759),
+			CSC0_COEF3_C1(0x12a) | CSC0_COEF3_C2(0x224),
+			CSC0_COEF4_C3(0x000) | CSC0_COEF4_D1(0x1f0),
+			CSC0_COEF5_D2(0x180) | CSC0_COEF5_D3(0x180),
+		},
+		[DRM_COLOR_YCBCR_FULL_RANGE] = {
+			/*
+			 * BT.2020 full range:
+			 *
+			 * |R|   |1.0000  0.0000  1.4746|   |Y  - 0  |
+			 * |G| = |1.0000 -0.1646 -0.5714| * |Cb - 128|
+			 * |B|   |1.0000  1.8814  0.0000|   |Cr - 128|
+			 */
+			CSC0_COEF0_A1(0x100) | CSC0_COEF0_A2(0x000),
+			CSC0_COEF1_A3(0x179) | CSC0_COEF1_B1(0x100),
+			CSC0_COEF2_B2(0x7d6) | CSC0_COEF2_B3(0x76e),
+			CSC0_COEF3_C1(0x100) | CSC0_COEF3_C2(0x1e2),
+			CSC0_COEF4_C3(0x000) | CSC0_COEF4_D1(0x000),
+			CSC0_COEF5_D2(0x180) | CSC0_COEF5_D3(0x180),
+		},
+	},
+};
+
 static void lcdif_set_formats(struct lcdif_drm_private *lcdif,
+			      struct drm_plane_state *plane_state,
 			      const u32 bus_format)
 {
 	struct drm_device *drm = lcdif->drm;
-	const u32 format = lcdif->crtc.primary->state->fb->format->format;
-
-	writel(CSC0_CTRL_BYPASS, lcdif->base + LCDC_V8_CSC0_CTRL);
+	const u32 format = plane_state->fb->format->format;
+	bool in_yuv = false;
+	bool out_yuv = false;
 
 	switch (bus_format) {
 	case MEDIA_BUS_FMT_RGB565_1X16:
···
 	case MEDIA_BUS_FMT_UYVY8_1X16:
 		writel(DISP_PARA_LINE_PATTERN_UYVY_H,
 		       lcdif->base + LCDC_V8_DISP_PARA);
-
-		/* CSC: BT.601 Full Range RGB to YCbCr coefficients. */
-		writel(CSC0_COEF0_A2(0x096) | CSC0_COEF0_A1(0x04c),
-		       lcdif->base + LCDC_V8_CSC0_COEF0);
-		writel(CSC0_COEF1_B1(0x7d5) | CSC0_COEF1_A3(0x01d),
-		       lcdif->base + LCDC_V8_CSC0_COEF1);
-		writel(CSC0_COEF2_B3(0x080) | CSC0_COEF2_B2(0x7ac),
-		       lcdif->base + LCDC_V8_CSC0_COEF2);
-		writel(CSC0_COEF3_C2(0x795) | CSC0_COEF3_C1(0x080),
-		       lcdif->base + LCDC_V8_CSC0_COEF3);
-		writel(CSC0_COEF4_D1(0x000) | CSC0_COEF4_C3(0x7ec),
-		       lcdif->base + LCDC_V8_CSC0_COEF4);
-		writel(CSC0_COEF5_D3(0x080) | CSC0_COEF5_D2(0x080),
-		       lcdif->base + LCDC_V8_CSC0_COEF5);
-
-		writel(CSC0_CTRL_CSC_MODE_RGB2YCbCr,
-		       lcdif->base + LCDC_V8_CSC0_CTRL);
-
+		out_yuv = true;
 		break;
 	default:
 		dev_err(drm->dev, "Unknown media bus format 0x%x\n", bus_format);
···
 	}
 
 	switch (format) {
+	/* RGB Formats */
 	case DRM_FORMAT_RGB565:
 		writel(CTRLDESCL0_5_BPP_16_RGB565,
 		       lcdif->base + LCDC_V8_CTRLDESCL0_5);
···
 		writel(CTRLDESCL0_5_BPP_32_ARGB8888,
 		       lcdif->base + LCDC_V8_CTRLDESCL0_5);
 		break;
+
+	/* YUV Formats */
+	case DRM_FORMAT_YUYV:
+		writel(CTRLDESCL0_5_BPP_YCbCr422 | CTRLDESCL0_5_YUV_FORMAT_VY2UY1,
+		       lcdif->base + LCDC_V8_CTRLDESCL0_5);
+		in_yuv = true;
+		break;
+	case DRM_FORMAT_YVYU:
+		writel(CTRLDESCL0_5_BPP_YCbCr422 | CTRLDESCL0_5_YUV_FORMAT_UY2VY1,
+		       lcdif->base + LCDC_V8_CTRLDESCL0_5);
+		in_yuv = true;
+		break;
+	case DRM_FORMAT_UYVY:
+		writel(CTRLDESCL0_5_BPP_YCbCr422 | CTRLDESCL0_5_YUV_FORMAT_Y2VY1U,
+		       lcdif->base + LCDC_V8_CTRLDESCL0_5);
+		in_yuv = true;
+		break;
+	case DRM_FORMAT_VYUY:
+		writel(CTRLDESCL0_5_BPP_YCbCr422 | CTRLDESCL0_5_YUV_FORMAT_Y2UY1V,
+		       lcdif->base + LCDC_V8_CTRLDESCL0_5);
+		in_yuv = true;
+		break;
+
 	default:
 		dev_err(drm->dev, "Unknown pixel format 0x%x\n", format);
 		break;
+	}
+
+	/*
+	 * The CSC differentiates between "YCbCr" and "YUV", but the reference
+	 * manual doesn't detail how they differ. Experiments showed that the
+	 * luminance value is unaffected, only the calculations involving chroma
+	 * values differ. The YCbCr mode behaves as expected, with chroma values
+	 * being offset by 128. The YUV mode isn't fully understood.
+	 */
+	if (!in_yuv && out_yuv) {
+		/* RGB -> YCbCr */
+		writel(CSC0_CTRL_CSC_MODE_RGB2YCbCr,
+		       lcdif->base + LCDC_V8_CSC0_CTRL);
+
+		/*
+		 * CSC: BT.601 Limited Range RGB to YCbCr coefficients.
+		 *
+		 * |Y |   | 0.2568  0.5041  0.0979|   |R|   |16 |
+		 * |Cb| = |-0.1482 -0.2910  0.4392| * |G| + |128|
+		 * |Cr|   | 0.4392  0.4392 -0.3678|   |B|   |128|
+		 */
+		writel(CSC0_COEF0_A2(0x081) | CSC0_COEF0_A1(0x041),
+		       lcdif->base + LCDC_V8_CSC0_COEF0);
+		writel(CSC0_COEF1_B1(0x7db) | CSC0_COEF1_A3(0x019),
+		       lcdif->base + LCDC_V8_CSC0_COEF1);
+		writel(CSC0_COEF2_B3(0x070) | CSC0_COEF2_B2(0x7b6),
+		       lcdif->base + LCDC_V8_CSC0_COEF2);
+		writel(CSC0_COEF3_C2(0x7a2) | CSC0_COEF3_C1(0x070),
+		       lcdif->base + LCDC_V8_CSC0_COEF3);
+		writel(CSC0_COEF4_D1(0x010) | CSC0_COEF4_C3(0x7ee),
+		       lcdif->base + LCDC_V8_CSC0_COEF4);
+		writel(CSC0_COEF5_D3(0x080) | CSC0_COEF5_D2(0x080),
+		       lcdif->base + LCDC_V8_CSC0_COEF5);
+	} else if (in_yuv && !out_yuv) {
+		/* YCbCr -> RGB */
+		const u32 *coeffs =
+			lcdif_yuv2rgb_coeffs[plane_state->color_encoding]
+					    [plane_state->color_range];
+
+		writel(CSC0_CTRL_CSC_MODE_YCbCr2RGB,
+		       lcdif->base + LCDC_V8_CSC0_CTRL);
+
+		writel(coeffs[0], lcdif->base + LCDC_V8_CSC0_COEF0);
+		writel(coeffs[1], lcdif->base + LCDC_V8_CSC0_COEF1);
+		writel(coeffs[2], lcdif->base + LCDC_V8_CSC0_COEF2);
+		writel(coeffs[3], lcdif->base + LCDC_V8_CSC0_COEF3);
+		writel(coeffs[4], lcdif->base + LCDC_V8_CSC0_COEF4);
+		writel(coeffs[5], lcdif->base + LCDC_V8_CSC0_COEF5);
+	} else {
+		/* RGB -> RGB, YCbCr -> YCbCr: bypass colorspace converter. */
+		writel(CSC0_CTRL_BYPASS, lcdif->base + LCDC_V8_CSC0_CTRL);
 	}
 }
 
···
 }
 
 static void lcdif_crtc_mode_set_nofb(struct lcdif_drm_private *lcdif,
+				     struct drm_plane_state *plane_state,
 				     struct drm_bridge_state *bridge_state,
 				     const u32 bus_format)
 {
···
 	/* Mandatory eLCDIF reset as per the Reference Manual */
 	lcdif_reset_block(lcdif);
 
-	lcdif_set_formats(lcdif, bus_format);
+	lcdif_set_formats(lcdif, plane_state, bus_format);
 
 	lcdif_set_mode(lcdif, bus_flags);
 }
···
 
 	pm_runtime_get_sync(drm->dev);
 
-	lcdif_crtc_mode_set_nofb(lcdif, bridge_state, bus_format);
+	lcdif_crtc_mode_set_nofb(lcdif, new_pstate, bridge_state, bus_format);
 
 	/* Write cur_buf as well to avoid an initial corrupt frame */
 	paddr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
···
 };
 
 static const u32 lcdif_primary_plane_formats[] = {
+	/* RGB */
 	DRM_FORMAT_RGB565,
 	DRM_FORMAT_RGB888,
 	DRM_FORMAT_XBGR8888,
 	DRM_FORMAT_XRGB1555,
 	DRM_FORMAT_XRGB4444,
 	DRM_FORMAT_XRGB8888,
+
+	/* Packed YCbCr */
+	DRM_FORMAT_YUYV,
+	DRM_FORMAT_YVYU,
+	DRM_FORMAT_UYVY,
+	DRM_FORMAT_VYUY,
 };
 
 static const u64 lcdif_modifiers[] = {
···
 
 int lcdif_kms_init(struct lcdif_drm_private *lcdif)
 {
+	const u32 supported_encodings = BIT(DRM_COLOR_YCBCR_BT601) |
+					BIT(DRM_COLOR_YCBCR_BT709) |
+					BIT(DRM_COLOR_YCBCR_BT2020);
+	const u32 supported_ranges = BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
+				     BIT(DRM_COLOR_YCBCR_FULL_RANGE);
 	struct drm_encoder *encoder = &lcdif->encoder;
 	struct drm_crtc *crtc = &lcdif->crtc;
 	int ret;
···
 				       ARRAY_SIZE(lcdif_primary_plane_formats),
 				       lcdif_modifiers, DRM_PLANE_TYPE_PRIMARY,
 				       NULL);
+	if (ret)
+		return ret;
+
+	ret = drm_plane_create_color_properties(&lcdif->planes.primary,
+						supported_encodings,
+						supported_ranges,
+						DRM_COLOR_YCBCR_BT601,
+						DRM_COLOR_YCBCR_LIMITED_RANGE);
 	if (ret)
 		return ret;
 

drivers/gpu/drm/mxsfb/lcdif_regs.h

···
 #define CTRL_FETCH_START_OPTION_BPV	BIT(9)
 #define CTRL_FETCH_START_OPTION_RESV	GENMASK(9, 8)
 #define CTRL_FETCH_START_OPTION_MASK	GENMASK(9, 8)
-#define CTRL_NEG				BIT(4)
+#define CTRL_NEG			BIT(4)
 #define CTRL_INV_PXCK			BIT(3)
 #define CTRL_INV_DE			BIT(2)
 #define CTRL_INV_VS			BIT(1)
···
 
 #define DISP_PARA_DISP_ON		BIT(31)
 #define DISP_PARA_SWAP_EN		BIT(30)
-#define DISP_PARA_LINE_PATTERN_UYVY_H	(GENMASK(29, 28) | BIT(26))
-#define DISP_PARA_LINE_PATTERN_RGB565	GENMASK(28, 26)
-#define DISP_PARA_LINE_PATTERN_RGB888	0
+#define DISP_PARA_LINE_PATTERN_UYVY_H	(0xd << 26)
+#define DISP_PARA_LINE_PATTERN_RGB565	(0x7 << 26)
+#define DISP_PARA_LINE_PATTERN_RGB888	(0x0 << 26)
 #define DISP_PARA_LINE_PATTERN_MASK	GENMASK(29, 26)
 #define DISP_PARA_DISP_MODE_MASK	GENMASK(25, 24)
 #define DISP_PARA_BGND_R_MASK		GENMASK(23, 16)
···
 #define INT_ENABLE_D1_PLANE_PANIC_EN	BIT(0)
 
 #define CTRLDESCL0_1_HEIGHT(n)		(((n) & 0xffff) << 16)
-#define CTRLDESCL0_1_HEIGHT_MASK		GENMASK(31, 16)
+#define CTRLDESCL0_1_HEIGHT_MASK	GENMASK(31, 16)
 #define CTRLDESCL0_1_WIDTH(n)		((n) & 0xffff)
 #define CTRLDESCL0_1_WIDTH_MASK		GENMASK(15, 0)
 
···
 
 #define CTRLDESCL0_5_EN			BIT(31)
 #define CTRLDESCL0_5_SHADOW_LOAD_EN	BIT(30)
-#define CTRLDESCL0_5_BPP_16_RGB565	BIT(26)
-#define CTRLDESCL0_5_BPP_16_ARGB1555	(BIT(26) | BIT(24))
-#define CTRLDESCL0_5_BPP_16_ARGB4444	(BIT(26) | BIT(25))
-#define CTRLDESCL0_5_BPP_YCbCr422	(BIT(26) | BIT(25) | BIT(24))
-#define CTRLDESCL0_5_BPP_24_RGB888	BIT(27)
-#define CTRLDESCL0_5_BPP_32_ARGB8888	(BIT(27) | BIT(24))
-#define CTRLDESCL0_5_BPP_32_ABGR8888	(BIT(27) | BIT(25))
+#define CTRLDESCL0_5_BPP_16_RGB565	(0x4 << 24)
+#define CTRLDESCL0_5_BPP_16_ARGB1555	(0x5 << 24)
+#define CTRLDESCL0_5_BPP_16_ARGB4444	(0x6 << 24)
+#define CTRLDESCL0_5_BPP_YCbCr422	(0x7 << 24)
+#define CTRLDESCL0_5_BPP_24_RGB888	(0x8 << 24)
+#define CTRLDESCL0_5_BPP_32_ARGB8888	(0x9 << 24)
+#define CTRLDESCL0_5_BPP_32_ABGR8888	(0xa << 24)
 #define CTRLDESCL0_5_BPP_MASK		GENMASK(27, 24)
-#define CTRLDESCL0_5_YUV_FORMAT_Y2VY1U	0
-#define CTRLDESCL0_5_YUV_FORMAT_Y2UY1V	BIT(14)
-#define CTRLDESCL0_5_YUV_FORMAT_VY2UY1	BIT(15)
-#define CTRLDESCL0_5_YUV_FORMAT_UY2VY1	(BIT(15) | BIT(14))
+#define CTRLDESCL0_5_YUV_FORMAT_Y2VY1U	(0x0 << 14)
+#define CTRLDESCL0_5_YUV_FORMAT_Y2UY1V	(0x1 << 14)
+#define CTRLDESCL0_5_YUV_FORMAT_VY2UY1	(0x2 << 14)
+#define CTRLDESCL0_5_YUV_FORMAT_UY2VY1	(0x3 << 14)
 #define CTRLDESCL0_5_YUV_FORMAT_MASK	GENMASK(15, 14)
 
-#define CSC0_CTRL_CSC_MODE_RGB2YCbCr	GENMASK(2, 1)
+#define CSC0_CTRL_CSC_MODE_YUV2RGB	(0x0 << 1)
+#define CSC0_CTRL_CSC_MODE_YCbCr2RGB	(0x1 << 1)
+#define CSC0_CTRL_CSC_MODE_RGB2YUV	(0x2 << 1)
+#define CSC0_CTRL_CSC_MODE_RGB2YCbCr	(0x3 << 1)
 #define CSC0_CTRL_CSC_MODE_MASK		GENMASK(2, 1)
 #define CSC0_CTRL_BYPASS		BIT(0)
 

drivers/gpu/drm/nouveau/dispnv50/disp.c

···
 {
 	struct nv50_dmac *dmac = container_of(push, typeof(*dmac), _push);
 
-	dmac->cur = push->cur - (u32 *)dmac->_push.mem.object.map.ptr;
+	dmac->cur = push->cur - (u32 __iomem *)dmac->_push.mem.object.map.ptr;
 	if (dmac->put != dmac->cur) {
 		/* Push buffer fetches are not coherent with BAR1, we need to ensure
 		 * writes have been flushed right through to VRAM before writing PUT.
···
 	if (WARN_ON(size > dmac->max))
 		return -EINVAL;
 
-	dmac->cur = push->cur - (u32 *)dmac->_push.mem.object.map.ptr;
+	dmac->cur = push->cur - (u32 __iomem *)dmac->_push.mem.object.map.ptr;
 	if (dmac->cur + size >= dmac->max) {
 		int ret = nv50_dmac_wind(dmac);
 		if (ret)

drivers/gpu/drm/nouveau/nouveau_display.c

···
 	drm_mode_create_dvi_i_properties(dev);
 
 	dev->mode_config.funcs = &nouveau_mode_config_funcs;
-	dev->mode_config.fb_base = device->func->resource_addr(device, 1);
 
 	dev->mode_config.min_width = 0;
 	dev->mode_config.min_height = 0;

drivers/gpu/drm/nouveau/nv04_fbcon.c

···
 	struct nouveau_channel *chan = drm->channel;
 	struct nvif_device *device = &drm->client.device;
 	struct nvif_push *push = chan->chan.push;
+	struct nvkm_device *nvkm_device = nvxx_device(&drm->client.device);
+	resource_size_t fb_base = nvkm_device->func->resource_addr(nvkm_device, 1);
 	int surface_fmt, pattern_fmt, rect_fmt;
 	int ret;
 
···
 			       0x0188, chan->vram.handle);
 	PUSH_NVSQ(push, NV042, 0x0300, surface_fmt,
 			       0x0304, info->fix.line_length | (info->fix.line_length << 16),
-			       0x0308, info->fix.smem_start - dev->mode_config.fb_base,
-			       0x030c, info->fix.smem_start - dev->mode_config.fb_base);
+			       0x0308, info->fix.smem_start - fb_base,
+			       0x030c, info->fix.smem_start - fb_base);
 
 	PUSH_NVSQ(push, NV043, 0x0000, nfbdev->rop.handle);
 	PUSH_NVSQ(push, NV043, 0x0300, 0x55);

drivers/gpu/drm/omapdrm/omap_fbdev.c

···
 
 	drm_fb_helper_fill_info(fbi, helper, sizes);
 
-	dev->mode_config.fb_base = dma_addr;
-
 	fbi->screen_buffer = omap_gem_vaddr(fbdev->bo);
 	fbi->screen_size = fbdev->bo->size;
 	fbi->fix.smem_start = dma_addr;

drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c

···
 
 	get_dma_buf(dma_buf);
 
-	sgt = dma_buf_map_attachment(attach, DMA_TO_DEVICE);
+	sgt = dma_buf_map_attachment_unlocked(attach, DMA_TO_DEVICE);
 	if (IS_ERR(sgt)) {
 		ret = PTR_ERR(sgt);
 		goto fail_detach;
···
 	return obj;
 
 fail_unmap:
-	dma_buf_unmap_attachment(attach, sgt, DMA_TO_DEVICE);
+	dma_buf_unmap_attachment_unlocked(attach, sgt, DMA_TO_DEVICE);
 fail_detach:
 	dma_buf_detach(dma_buf, attach);
 	dma_buf_put(dma_buf);

drivers/gpu/drm/panel/panel-samsung-db7430.c

···
 };
 MODULE_DEVICE_TABLE(of, db7430_match);
 
+static const struct spi_device_id db7430_ids[] = {
+	{ "lms397kf04" },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, db7430_ids);
+
 static struct spi_driver db7430_driver = {
 	.probe		= db7430_probe,
 	.remove		= db7430_remove,
+	.id_table	= db7430_ids,
 	.driver		= {
 		.name	= "db7430-panel",
 		.of_match_table = db7430_match,

drivers/gpu/drm/panel/panel-tpo-tpg110.c

···
 };
 MODULE_DEVICE_TABLE(of, tpg110_match);
 
+static const struct spi_device_id tpg110_ids[] = {
+	{ "tpg110" },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, tpg110_ids);
+
 static struct spi_driver tpg110_driver = {
 	.probe		= tpg110_probe,
 	.remove		= tpg110_remove,
+	.id_table	= tpg110_ids,
 	.driver		= {
 		.name	= "tpo-tpg110-panel",
 		.of_match_table = tpg110_match,

drivers/gpu/drm/panel/panel-widechips-ws2401.c

···
 };
 MODULE_DEVICE_TABLE(of, ws2401_match);
 
+static const struct spi_device_id ws2401_ids[] = {
+	{ "lms380kf01" },
+	{ },
+};
+MODULE_DEVICE_TABLE(spi, ws2401_ids);
+
 static struct spi_driver ws2401_driver = {
 	.probe		= ws2401_probe,
 	.remove		= ws2401_remove,
+	.id_table	= ws2401_ids,
 	.driver		= {
 		.name	= "ws2401-panel",
 		.of_match_table = ws2401_match,

drivers/gpu/drm/panfrost/panfrost_dump.c

···
 			goto dump_header;
 		}
 
-		ret = drm_gem_shmem_vmap(&bo->base, &map);
+		ret = drm_gem_vmap_unlocked(&bo->base.base, &map);
 		if (ret) {
 			dev_err(pfdev->dev, "Panfrost Dump: couldn't map Buffer Object\n");
 			iter.hdr->bomap.valid = 0;
···
 		vaddr = map.vaddr;
 		memcpy(iter.data, vaddr, bo->base.base.size);
 
-		drm_gem_shmem_vunmap(&bo->base, &map);
+		drm_gem_vunmap_unlocked(&bo->base.base, &map);
 
 		iter.hdr->bomap.valid = 1;
 

drivers/gpu/drm/panfrost/panfrost_perfcnt.c

···
 		goto err_close_bo;
 	}
 
-	ret = drm_gem_shmem_vmap(bo, &map);
+	ret = drm_gem_vmap_unlocked(&bo->base, &map);
 	if (ret)
 		goto err_put_mapping;
 	perfcnt->buf = map.vaddr;
···
 	return 0;
 
 err_vunmap:
-	drm_gem_shmem_vunmap(bo, &map);
+	drm_gem_vunmap_unlocked(&bo->base, &map);
 err_put_mapping:
 	panfrost_gem_mapping_put(perfcnt->mapping);
 err_close_bo:
···
 		  GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_OFF));
 
 	perfcnt->user = NULL;
-	drm_gem_shmem_vunmap(&perfcnt->mapping->obj->base, &map);
+	drm_gem_vunmap_unlocked(&perfcnt->mapping->obj->base.base, &map);
 	perfcnt->buf = NULL;
 	panfrost_gem_close(&perfcnt->mapping->obj->base.base, file_priv);
 	panfrost_mmu_as_put(pfdev, perfcnt->mapping->mmu);

drivers/gpu/drm/qxl/qxl_display.c

···
 	qdev->ddev.mode_config.max_width = 8192;
 	qdev->ddev.mode_config.max_height = 8192;
 
-	qdev->ddev.mode_config.fb_base = qdev->vram_base;
-
 	drm_mode_create_suggested_offset_properties(&qdev->ddev);
 	qxl_mode_create_hotplug_mode_update_property(qdev);
 

drivers/gpu/drm/qxl/qxl_object.c

···
 		bo->map_count++;
 		goto out;
 	}
-	r = ttm_bo_vmap(&bo->tbo, &bo->map);
+
+	r = __qxl_bo_pin(bo);
 	if (r)
 		return r;
+
+	r = ttm_bo_vmap(&bo->tbo, &bo->map);
+	if (r) {
+		__qxl_bo_unpin(bo);
+		return r;
+	}
 	bo->map_count = 1;
 
 	/* TODO: Remove kptr in favor of map everywhere. */
···
 	r = qxl_bo_reserve(bo);
 	if (r)
 		return r;
-
-	r = __qxl_bo_pin(bo);
-	if (r) {
-		qxl_bo_unreserve(bo);
-		return r;
-	}
 
 	r = qxl_bo_vmap_locked(bo, map);
 	qxl_bo_unreserve(bo);
···
 		return;
 	bo->kptr = NULL;
 	ttm_bo_vunmap(&bo->tbo, &bo->map);
+	__qxl_bo_unpin(bo);
 }
 
 int qxl_bo_vunmap(struct qxl_bo *bo)
···
 		return r;
 
 	qxl_bo_vunmap_locked(bo);
-	__qxl_bo_unpin(bo);
 	qxl_bo_unreserve(bo);
 	return 0;
 }

drivers/gpu/drm/qxl/qxl_prime.c

···
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 	int ret;
 
-	ret = qxl_bo_vmap(bo, map);
+	ret = qxl_bo_vmap_locked(bo, map);
 	if (ret < 0)
 		return ret;
 
···
 {
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 
-	qxl_bo_vunmap(bo);
+	qxl_bo_vunmap_locked(bo);
 }

drivers/gpu/drm/radeon/radeon_display.c

···
 
 	rdev->ddev->mode_config.fb_modifiers_not_supported = true;
 
-	rdev->ddev->mode_config.fb_base = rdev->mc.aper_base;
-
 	ret = radeon_modeset_create_props(rdev);
 	if (ret) {
 		return ret;

drivers/gpu/drm/radeon/radeon_fb.c

···
 	drm_fb_helper_fill_info(info, &rfbdev->helper, sizes);
 
 	/* setup aperture base/size for vesafb takeover */
-	info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
+	info->apertures->ranges[0].base = rdev->mc.aper_base;
 	info->apertures->ranges[0].size = rdev->mc.aper_size;
 
 	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */

drivers/gpu/drm/scheduler/sched_entity.c

···
 	entity->priority = priority;
 	entity->sched_list = num_sched_list > 1 ? sched_list : NULL;
 	entity->last_scheduled = NULL;
+	RB_CLEAR_NODE(&entity->rb_tree_node);
 
 	if(num_sched_list)
 		entity->rq = &sched_list[0]->sched_rq[entity->priority];
···
 	struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
 						 finish_cb);
 
+	dma_fence_put(f);
 	INIT_WORK(&job->work, drm_sched_entity_kill_jobs_work);
 	schedule_work(&job->work);
 }
···
 		struct drm_sched_fence *s_fence = job->s_fence;
 
 		/* Wait for all dependencies to avoid data corruptions */
-		while ((f = drm_sched_job_dependency(job, entity)))
+		while ((f = drm_sched_job_dependency(job, entity))) {
 			dma_fence_wait(f, false);
+			dma_fence_put(f);
+		}
 
 		drm_sched_fence_scheduled(s_fence);
 		dma_fence_set_error(&s_fence->finished, -ESRCH);
···
 			continue;
 		}
 
+		dma_fence_get(entity->last_scheduled);
 		r = dma_fence_add_callback(entity->last_scheduled,
 					   &job->finish_cb,
 					   drm_sched_entity_kill_jobs_cb);
···
 	smp_wmb();
 
 	spsc_queue_pop(&entity->job_queue);
+
+	/*
+	 * Update the entity's location in the min heap according to
+	 * the timestamp of the next job, if any.
+	 */
+	if (drm_sched_policy == DRM_SCHED_POLICY_FIFO) {
+		struct drm_sched_job *next;
+
+		next = to_drm_sched_job(spsc_queue_peek(&entity->job_queue));
+		if (next)
+			drm_sched_rq_update_fifo(entity, next->submit_ts);
+	}
+
 	return sched_job;
 }
 
···
 	atomic_inc(entity->rq->sched->score);
 	WRITE_ONCE(entity->last_user, current->group_leader);
 	first = spsc_queue_push(&entity->job_queue, &sched_job->queue_node);
+	sched_job->submit_ts = ktime_get();
 
 	/* first job wakes up scheduler */
 	if (first) {
···
 			DRM_ERROR("Trying to push to a killed entity\n");
 			return;
 		}
+
 		drm_sched_rq_add_entity(entity->rq, entity);
 		spin_unlock(&entity->rq_lock);
+
+		if (drm_sched_policy == DRM_SCHED_POLICY_FIFO)
+			drm_sched_rq_update_fifo(entity, sched_job->submit_ts);
+
 		drm_sched_wakeup(entity->rq->sched);
 	}
 }

drivers/gpu/drm/scheduler/sched_main.c

···
 #define to_drm_sched_job(sched_job)		\
 		container_of((sched_job), struct drm_sched_job, queue_node)
 
+int drm_sched_policy = DRM_SCHED_POLICY_RR;
+
+/**
+ * DOC: sched_policy (int)
+ * Used to override default entities scheduling policy in a run queue.
+ */
+MODULE_PARM_DESC(sched_policy, "Specify schedule policy for entities on a runqueue, " __stringify(DRM_SCHED_POLICY_RR) " = Round Robin (default), " __stringify(DRM_SCHED_POLICY_FIFO) " = use FIFO.");
+module_param_named(sched_policy, drm_sched_policy, int, 0444);
+
+static __always_inline bool drm_sched_entity_compare_before(struct rb_node *a,
+							    const struct rb_node *b)
+{
+	struct drm_sched_entity *ent_a =  rb_entry((a), struct drm_sched_entity, rb_tree_node);
+	struct drm_sched_entity *ent_b =  rb_entry((b), struct drm_sched_entity, rb_tree_node);
+
+	return ktime_before(ent_a->oldest_job_waiting, ent_b->oldest_job_waiting);
+}
+
+static inline void drm_sched_rq_remove_fifo_locked(struct drm_sched_entity *entity)
+{
+	struct drm_sched_rq *rq = entity->rq;
+
+	if (!RB_EMPTY_NODE(&entity->rb_tree_node)) {
+		rb_erase_cached(&entity->rb_tree_node, &rq->rb_tree_root);
+		RB_CLEAR_NODE(&entity->rb_tree_node);
+	}
+}
+
+void drm_sched_rq_update_fifo(struct drm_sched_entity *entity, ktime_t ts)
+{
+	/*
+	 * Both locks need to be grabbed, one to protect from entity->rq change
+	 * for entity from within concurrent drm_sched_entity_select_rq and the
+	 * other to update the rb tree structure.
+	 */
+	spin_lock(&entity->rq_lock);
+	spin_lock(&entity->rq->lock);
+
+	drm_sched_rq_remove_fifo_locked(entity);
+
+	entity->oldest_job_waiting = ts;
+
+	rb_add_cached(&entity->rb_tree_node, &entity->rq->rb_tree_root,
+		      drm_sched_entity_compare_before);
+
+	spin_unlock(&entity->rq->lock);
+	spin_unlock(&entity->rq_lock);
+}
+
 /**
  * drm_sched_rq_init - initialize a given run queue struct
  *
···
 {
 	spin_lock_init(&rq->lock);
 	INIT_LIST_HEAD(&rq->entities);
+	rq->rb_tree_root = RB_ROOT_CACHED;
 	rq->current_entity = NULL;
 	rq->sched = sched;
 }
···
 {
 	if (!list_empty(&entity->list))
 		return;
+
 	spin_lock(&rq->lock);
+
 	atomic_inc(rq->sched->score);
 	list_add_tail(&entity->list, &rq->entities);
+
 	spin_unlock(&rq->lock);
 }
 
···
 {
 	if (list_empty(&entity->list))
 		return;
+
 	spin_lock(&rq->lock);
+
 	atomic_dec(rq->sched->score);
 	list_del_init(&entity->list);
+
 	if (rq->current_entity == entity)
 		rq->current_entity = NULL;
+
+	if (drm_sched_policy == DRM_SCHED_POLICY_FIFO)
+		drm_sched_rq_remove_fifo_locked(entity);
+
 	spin_unlock(&rq->lock);
 }
 
 /**
- * drm_sched_rq_select_entity - Select an entity which could provide a job to run
+ * drm_sched_rq_select_entity_rr - Select an entity which could provide a job to run
  *
  * @rq: scheduler run queue to check.
  *
  * Try to find a ready entity, returns NULL if none found.
  */
 static struct drm_sched_entity *
-drm_sched_rq_select_entity(struct drm_sched_rq *rq)
+drm_sched_rq_select_entity_rr(struct drm_sched_rq *rq)
 {
 	struct drm_sched_entity *entity;
 
···
 	spin_unlock(&rq->lock);
 
 	return NULL;
+}
+
+/**
+ * drm_sched_rq_select_entity_fifo - Select an entity which provides a job to run
+ *
+ * @rq: scheduler run queue to check.
+ *
+ * Find oldest waiting ready entity, returns NULL if none found.
+ */
+static struct drm_sched_entity *
+drm_sched_rq_select_entity_fifo(struct drm_sched_rq *rq)
+{
+	struct rb_node *rb;
+
+	spin_lock(&rq->lock);
+	for (rb = rb_first_cached(&rq->rb_tree_root); rb; rb = rb_next(rb)) {
+		struct drm_sched_entity *entity;
+
+		entity = rb_entry(rb, struct drm_sched_entity, rb_tree_node);
+		if (drm_sched_entity_is_ready(entity)) {
+			rq->current_entity = entity;
+			reinit_completion(&entity->entity_idle);
+			break;
+		}
+	}
+	spin_unlock(&rq->lock);
+
+	return rb ? rb_entry(rb, struct drm_sched_entity, rb_tree_node) : NULL;
 }
 
 /**
···
 
 	/* Kernel run queue has higher priority than normal run queue*/
 	for (i = DRM_SCHED_PRIORITY_COUNT - 1; i >= DRM_SCHED_PRIORITY_MIN; i--) {
-		entity = drm_sched_rq_select_entity(&sched->sched_rq[i]);
+		entity = drm_sched_policy == DRM_SCHED_POLICY_FIFO ?
+			drm_sched_rq_select_entity_fifo(&sched->sched_rq[i]) :
+			drm_sched_rq_select_entity_rr(&sched->sched_rq[i]);
 		if (entity)
 			break;
 	}

drivers/gpu/drm/solomon/ssd130x.c

···
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
 #include <drm/drm_damage_helper.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_fb_helper.h>
···
 	struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
 	struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
 	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
+	struct drm_atomic_helper_damage_iter iter;
 	struct drm_device *drm = plane->dev;
-	struct drm_rect src_clip, dst_clip;
+	struct drm_rect dst_clip;
+	struct drm_rect damage;
 	int idx;
-
-	if (!drm_atomic_helper_damage_merged(old_plane_state, plane_state, &src_clip))
-		return;
-
-	dst_clip = plane_state->dst;
-	if (!drm_rect_intersect(&dst_clip, &src_clip))
-		return;
 
 	if (!drm_dev_enter(drm, &idx))
 		return;
 
-	ssd130x_fb_blit_rect(plane_state->fb, &shadow_plane_state->data[0], &dst_clip);
+	drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
+	drm_atomic_for_each_plane_damage(&iter, &damage) {
+		dst_clip = plane_state->dst;
+
+		if (!drm_rect_intersect(&dst_clip, &damage))
+			continue;
+
+		ssd130x_fb_blit_rect(plane_state->fb, &shadow_plane_state->data[0], &dst_clip);
+	}
 
 	drm_dev_exit(idx);
 }
···
 	return MODE_OK;
 }
 
-static int ssd130x_crtc_helper_atomic_check(struct drm_crtc *crtc,
-					    struct drm_atomic_state *new_state)
-{
-	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
-	int ret;
-
-	ret = drm_atomic_helper_check_crtc_state(new_crtc_state, false);
-	if (ret)
-		return ret;
-
-	return drm_atomic_add_affected_planes(new_state, crtc);
-}
-
 /*
  * The CRTC is always enabled. Screen updates are performed by
  * the primary plane's atomic_update function. Disabling clears
···
  */
 static const struct drm_crtc_helper_funcs ssd130x_crtc_helper_funcs = {
 	.mode_valid = ssd130x_crtc_helper_mode_valid,
-	.atomic_check = ssd130x_crtc_helper_atomic_check,
+	.atomic_check = drm_crtc_helper_atomic_check,
 };
 
 static void ssd130x_crtc_reset(struct drm_crtc *crtc)

drivers/gpu/drm/tegra/fb.c

···
 		}
 	}
 
-	drm->mode_config.fb_base = (resource_size_t)bo->iova;
 	info->screen_base = (void __iomem *)bo->vaddr + offset;
 	info->screen_size = size;
 	info->fix.smem_start = (unsigned long)(bo->iova + offset);

drivers/gpu/drm/tegra/gem.c

···
 			goto free;
 		}
 
-		map->sgt = dma_buf_map_attachment(map->attach, direction);
+		map->sgt = dma_buf_map_attachment_unlocked(map->attach, direction);
 		if (IS_ERR(map->sgt)) {
 			dma_buf_detach(buf, map->attach);
 			err = PTR_ERR(map->sgt);
···
 static void tegra_bo_unpin(struct host1x_bo_mapping *map)
 {
 	if (map->attach) {
-		dma_buf_unmap_attachment(map->attach, map->sgt, map->direction);
+		dma_buf_unmap_attachment_unlocked(map->attach, map->sgt,
+						  map->direction);
 		dma_buf_detach(map->attach->dmabuf, map->attach);
 	} else {
 		dma_unmap_sgtable(map->dev, map->sgt, map->direction, 0);
···
 	if (obj->vaddr) {
 		return obj->vaddr;
 	} else if (obj->gem.import_attach) {
-		ret = dma_buf_vmap(obj->gem.import_attach->dmabuf, &map);
+		ret = dma_buf_vmap_unlocked(obj->gem.import_attach->dmabuf, &map);
 		return ret ? NULL : map.vaddr;
 	} else {
 		return vmap(obj->pages, obj->num_pages, VM_MAP,
···
 	if (obj->vaddr)
 		return;
 	else if (obj->gem.import_attach)
-		dma_buf_vunmap(obj->gem.import_attach->dmabuf, &map);
+		dma_buf_vunmap_unlocked(obj->gem.import_attach->dmabuf, &map);
 	else
 		vunmap(addr);
 }
···
 
 	get_dma_buf(buf);
 
-	bo->sgt = dma_buf_map_attachment(attach, DMA_TO_DEVICE);
+	bo->sgt = dma_buf_map_attachment_unlocked(attach, DMA_TO_DEVICE);
 	if (IS_ERR(bo->sgt)) {
 		err = PTR_ERR(bo->sgt);
 		goto detach;
···
 
 detach:
 	if (!IS_ERR_OR_NULL(bo->sgt))
-		dma_buf_unmap_attachment(attach, bo->sgt, DMA_TO_DEVICE);
+		dma_buf_unmap_attachment_unlocked(attach, bo->sgt, DMA_TO_DEVICE);
 
 	dma_buf_detach(buf, attach);
 	dma_buf_put(buf);
···
 		tegra_bo_iommu_unmap(tegra, bo);
 
 	if (gem->import_attach) {
-		dma_buf_unmap_attachment(gem->import_attach, bo->sgt,
-					 DMA_TO_DEVICE);
+		dma_buf_unmap_attachment_unlocked(gem->import_attach, bo->sgt,
+						  DMA_TO_DEVICE);
 		drm_prime_gem_destroy(gem, NULL);
 	} else {
 		tegra_bo_free(gem->dev, bo);

drivers/gpu/drm/tests/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
 
-obj-$(CONFIG_DRM_KUNIT_TEST) += drm_format_helper_test.o drm_damage_helper_test.o \
-	drm_cmdline_parser_test.o drm_rect_test.o drm_format_test.o drm_plane_helper_test.o \
-	drm_dp_mst_helper_test.o drm_framebuffer_test.o drm_buddy_test.o drm_mm_test.o
+obj-$(CONFIG_DRM_KUNIT_TEST) += \
+	drm_buddy_test.o \
+	drm_cmdline_parser_test.o \
+	drm_damage_helper_test.o \
+	drm_dp_mst_helper_test.o \
+	drm_format_helper_test.o \
+	drm_format_test.o \
+	drm_framebuffer_test.o \
+	drm_mm_test.o \
+	drm_plane_helper_test.o \
+	drm_rect_test.o

drivers/gpu/drm/tests/drm_dp_mst_helper_test.c

···
  * Copyright (c) 2022 Maíra Canal <[e-mail]>
  */
 
-#define PREFIX_STR "[drm_dp_mst_helper]"
-
 #include <kunit/test.h>
-
-#include <linux/random.h>
 
 #include <drm/display/drm_dp_mst_helper.h>
 #include <drm/drm_print.h>
 
 #include "../display/drm_dp_mst_topology_internal.h"
 
+struct drm_dp_mst_calc_pbn_mode_test {
+	const int clock;
+	const int bpp;
+	const bool dsc;
+	const int expected;
+};
+
+static const struct drm_dp_mst_calc_pbn_mode_test drm_dp_mst_calc_pbn_mode_cases[] = {
+	{
+		.clock = 154000,
+		.bpp = 30,
+		.dsc = false,
+		.expected = 689
+	},
+	{
+		.clock = 234000,
+		.bpp = 30,
+		.dsc = false,
+		.expected = 1047
+	},
+	{
+		.clock = 297000,
+		.bpp = 24,
+		.dsc = false,
+		.expected = 1063
+	},
+	{
+		.clock = 332880,
+		.bpp = 24,
+		.dsc = true,
+		.expected = 50
+	},
+	{
+		.clock = 324540,
+		.bpp = 24,
+		.dsc = true,
+		.expected = 49
+	},
+};
+
 static void drm_test_dp_mst_calc_pbn_mode(struct kunit *test)
 {
-	int pbn, i;
-	const struct {
-		int rate;
-		int bpp;
-		int expected;
-		bool dsc;
-	} test_params[] = {
-		{ 154000, 30, 689, false },
-		{ 234000, 30, 1047, false },
-		{ 297000, 24, 1063, false },
-		{ 332880, 24, 50, true },
-		{ 324540, 24, 49, true },
-	};
+	const struct drm_dp_mst_calc_pbn_mode_test *params = test->param_value;
 
-	for (i = 0; i < ARRAY_SIZE(test_params); i++) {
-		pbn = drm_dp_calc_pbn_mode(test_params[i].rate,
-					   test_params[i].bpp,
-					   test_params[i].dsc);
-		KUNIT_EXPECT_EQ_MSG(test, pbn, test_params[i].expected,
-				    "Expected PBN %d for clock %d bpp %d, got %d\n",
-		     test_params[i].expected, test_params[i].rate,
-		     test_params[i].bpp, pbn);
-	}
+	KUNIT_EXPECT_EQ(test, drm_dp_calc_pbn_mode(params->clock, params->bpp, params->dsc),
+			params->expected);
 }
+
+static void dp_mst_calc_pbn_mode_desc(const struct drm_dp_mst_calc_pbn_mode_test *t, char *desc)
+{
+	sprintf(desc, "Clock %d BPP %d DSC %s", t->clock, t->bpp, t->dsc ? "enabled" : "disabled");
+}
+
+KUNIT_ARRAY_PARAM(drm_dp_mst_calc_pbn_mode, drm_dp_mst_calc_pbn_mode_cases,
+		  dp_mst_calc_pbn_mode_desc);
+
+static u8 data[] = { 0xff, 0x00, 0xdd };
+
+struct drm_dp_mst_sideband_msg_req_test {
+	const char *desc;
+	const struct drm_dp_sideband_msg_req_body in;
+};
+
+static const struct drm_dp_mst_sideband_msg_req_test drm_dp_mst_sideband_msg_req_cases[] = {
+	{
+		.desc = "DP_ENUM_PATH_RESOURCES with port number",
+		.in = {
+			.req_type = DP_ENUM_PATH_RESOURCES,
+			.u.port_num.port_number = 5,
+		},
+	},
+	{
+		.desc = "DP_POWER_UP_PHY with port number",
+		.in = {
+			.req_type = DP_POWER_UP_PHY,
+			.u.port_num.port_number = 5,
+		},
+	},
+	{
+		.desc = "DP_POWER_DOWN_PHY with port number",
+		.in = {
+			.req_type = DP_POWER_DOWN_PHY,
+			.u.port_num.port_number = 5,
+		},
+	},
+	{
+		.desc = "DP_ALLOCATE_PAYLOAD with SDP stream sinks",
+		.in = {
+			.req_type = DP_ALLOCATE_PAYLOAD,
+			.u.allocate_payload.number_sdp_streams = 3,
+			.u.allocate_payload.sdp_stream_sink = { 1, 2, 3 },
+		},
+	},
+	{
+		.desc = "DP_ALLOCATE_PAYLOAD with port number",
+		.in = {
+			.req_type = DP_ALLOCATE_PAYLOAD,
+			.u.allocate_payload.port_number = 0xf,
+		},
+	},
+	{
+		.desc = "DP_ALLOCATE_PAYLOAD with VCPI",
+		.in = {
+			.req_type = DP_ALLOCATE_PAYLOAD,
+			.u.allocate_payload.vcpi = 0x7f,
+		},
+	},
+	{
+		.desc = "DP_ALLOCATE_PAYLOAD with PBN",
+		.in = {
+			.req_type = DP_ALLOCATE_PAYLOAD,
+			.u.allocate_payload.pbn = U16_MAX,
+		},
+	},
+	{
+		.desc = "DP_QUERY_PAYLOAD with port number",
+		.in = {
+			.req_type = DP_QUERY_PAYLOAD,
+			.u.query_payload.port_number = 0xf,
+		},
+	},
+	{
+		.desc = "DP_QUERY_PAYLOAD with VCPI",
+		.in = {
+			.req_type = DP_QUERY_PAYLOAD,
+			.u.query_payload.vcpi = 0x7f,
+		},
+	},
+	{
+		.desc = "DP_REMOTE_DPCD_READ with port number",
+		.in = {
+			.req_type = DP_REMOTE_DPCD_READ,
+			.u.dpcd_read.port_number = 0xf,
+		},
+	},
+	{
+		.desc = "DP_REMOTE_DPCD_READ with DPCD address",
+		.in = {
+			.req_type = DP_REMOTE_DPCD_READ,
+			.u.dpcd_read.dpcd_address = 0xfedcb,
+		},
+	},
+	{
+		.desc = "DP_REMOTE_DPCD_READ with max number of bytes",
+		.in = {
+			.req_type = DP_REMOTE_DPCD_READ,
+			.u.dpcd_read.num_bytes = U8_MAX,
+		},
+	},
+	{
+		.desc = "DP_REMOTE_DPCD_WRITE with port number",
+		.in = {
+			.req_type = DP_REMOTE_DPCD_WRITE,
+			.u.dpcd_write.port_number = 0xf,
+		},
+	},
+	{
+		.desc = "DP_REMOTE_DPCD_WRITE with DPCD address",
+		.in = {
+			.req_type = DP_REMOTE_DPCD_WRITE,
+			.u.dpcd_write.dpcd_address = 0xfedcb,
+		},
+	},
+	{
+		.desc = "DP_REMOTE_DPCD_WRITE with data array",
+		.in = {
+			.req_type = DP_REMOTE_DPCD_WRITE,
+			.u.dpcd_write.num_bytes = ARRAY_SIZE(data),
+			.u.dpcd_write.bytes = data,
+		},
+	},
+	{
+		.desc = "DP_REMOTE_I2C_READ with port number",
+		.in = {
+			.req_type = DP_REMOTE_I2C_READ,
+			.u.i2c_read.port_number = 0xf,
+		},
+	},
+	{
+		.desc = "DP_REMOTE_I2C_READ with I2C device ID",
+		.in = {
+			.req_type = DP_REMOTE_I2C_READ,
+			.u.i2c_read.read_i2c_device_id = 0x7f,
+		},
+	},
+	{
+		.desc = "DP_REMOTE_I2C_READ with transactions array",
+		.in = {
+			.req_type = DP_REMOTE_I2C_READ,
+			.u.i2c_read.num_transactions = 3,
+			.u.i2c_read.num_bytes_read = ARRAY_SIZE(data) * 3,
+			.u.i2c_read.transactions = {
+				{ .bytes = data, .num_bytes = ARRAY_SIZE(data), .i2c_dev_id = 0x7f,
+				  .i2c_transaction_delay = 0xf, },
+				{ .bytes = data, .num_bytes = ARRAY_SIZE(data), .i2c_dev_id = 0x7e,
+				  .i2c_transaction_delay = 0xe, },
+				{ .bytes = data, .num_bytes = ARRAY_SIZE(data), .i2c_dev_id = 0x7d,
+				  .i2c_transaction_delay = 0xd, },
+			},
+		},
+	},
+	{
+		.desc = "DP_REMOTE_I2C_WRITE with port number",
+		.in = {
+			.req_type = DP_REMOTE_I2C_WRITE,
+			.u.i2c_write.port_number = 0xf,
+		},
+	},
+	{
+		.desc = "DP_REMOTE_I2C_WRITE with I2C device ID",
+		.in = {
+			.req_type = DP_REMOTE_I2C_WRITE,
+			.u.i2c_write.write_i2c_device_id = 0x7f,
+		},
+	},
+	{
+		.desc = "DP_REMOTE_I2C_WRITE with data array",
+		.in = {
+			.req_type = DP_REMOTE_I2C_WRITE,
+			.u.i2c_write.num_bytes = ARRAY_SIZE(data),
+			.u.i2c_write.bytes = data,
+		},
+	},
+	{
+		.desc = "DP_QUERY_STREAM_ENC_STATUS with stream ID",
+		.in = {
+			.req_type = DP_QUERY_STREAM_ENC_STATUS,
+			.u.enc_status.stream_id = 1,
+		},
+	},
+	{
+		.desc = "DP_QUERY_STREAM_ENC_STATUS with client ID",
+		.in = {
+			.req_type = DP_QUERY_STREAM_ENC_STATUS,
+			.u.enc_status.client_id = { 0x4f, 0x7f, 0xb4, 0x00, 0x8c, 0x0d, 0x67 },
+		},
+	},
+	{
+		.desc = "DP_QUERY_STREAM_ENC_STATUS with stream event",
+		.in = {
+			.req_type = DP_QUERY_STREAM_ENC_STATUS,
+			.u.enc_status.stream_event = 3,
+		},
+	},
+	{
+		.desc = "DP_QUERY_STREAM_ENC_STATUS with valid stream event",
+		.in = {
+			.req_type = DP_QUERY_STREAM_ENC_STATUS,
+			.u.enc_status.valid_stream_event = 0,
+		},
+	},
+	{
+		.desc = "DP_QUERY_STREAM_ENC_STATUS with stream behavior",
+		.in = {
+			.req_type = DP_QUERY_STREAM_ENC_STATUS,
+			.u.enc_status.stream_behavior = 3,
+		},
+	},
+	{
+		.desc = "DP_QUERY_STREAM_ENC_STATUS with a valid stream behavior",
+		.in = {
+			.req_type = DP_QUERY_STREAM_ENC_STATUS,
+			.u.enc_status.valid_stream_behavior = 1,
+		}
+	},
+};
 
 static bool
 sideband_msg_req_equal(const struct drm_dp_sideband_msg_req_body *in,
···
 	return true;
 }
 
-static bool
-sideband_msg_req_encode_decode(struct drm_dp_sideband_msg_req_body *in)
+static void drm_test_dp_mst_msg_printf(struct drm_printer *p, struct va_format *vaf)
 {
+	struct kunit *test = p->arg;
+
+	kunit_err(test, "%pV", vaf);
+}
+
+static void drm_test_dp_mst_sideband_msg_req_decode(struct kunit *test)
+{
+	const struct drm_dp_mst_sideband_msg_req_test *params = test->param_value;
+	const struct drm_dp_sideband_msg_req_body *in = &params->in;
 	struct drm_dp_sideband_msg_req_body *out;
-	struct drm_printer p = drm_err_printer(PREFIX_STR);
 	struct drm_dp_sideband_msg_tx *txmsg;
-	int i, ret;
-	bool result = true;
+	struct drm_printer p = {
+		.printfn = drm_test_dp_mst_msg_printf,
+		.arg = test
+	};
+	int i;
 
-	out = kzalloc(sizeof(*out), GFP_KERNEL);
-	if (!out)
-		return false;
+	out = kunit_kzalloc(test, sizeof(*out), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, out);
 
-	txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);
-	if (!txmsg) {
-		kfree(out);
-		return false;
-	}
+	txmsg = kunit_kzalloc(test, sizeof(*txmsg), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, txmsg);
 
 	drm_dp_encode_sideband_req(in, txmsg);
-	ret = drm_dp_decode_sideband_req(txmsg, out);
-	if (ret < 0) {
-		drm_printf(&p, "Failed to decode sideband request: %d\n",
-			   ret);
-		result = false;
-		goto out;
-	}
+	KUNIT_EXPECT_GE_MSG(test, drm_dp_decode_sideband_req(txmsg, out), 0,
+			    "Failed to decode sideband request");
 
 	if (!sideband_msg_req_equal(in, out)) {
-		drm_printf(&p, "Encode/decode failed, expected:\n");
+		KUNIT_FAIL(test, "Encode/decode failed");
+		kunit_err(test, "Expected:");
 		drm_dp_dump_sideband_msg_req_body(in, 1, &p);
-		drm_printf(&p, "Got:\n");
+		kunit_err(test, "Got:");
 		drm_dp_dump_sideband_msg_req_body(out, 1, &p);
-		result = false;
-		goto out;
 	}
 
 	switch (in->req_type) {
···
 		kfree(out->u.i2c_write.bytes);
 		break;
 	}
-
-	/* Clear everything but the req_type for the input */
-	memset(&in->u, 0, sizeof(in->u));
-
-out:
-	kfree(out);
-	kfree(txmsg);
-	return result;
 }
 
-static void drm_test_dp_mst_sideband_msg_req_decode(struct kunit *test)
+static void
+drm_dp_mst_sideband_msg_req_desc(const struct drm_dp_mst_sideband_msg_req_test *t, char *desc)
 {
-	struct drm_dp_sideband_msg_req_body in = { 0 };
-	u8 data[] = { 0xff, 0x0, 0xdd };
-	int i;
-
-	in.req_type = DP_ENUM_PATH_RESOURCES;
-	in.u.port_num.port_number = 5;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-
-	in.req_type = DP_POWER_UP_PHY;
-	in.u.port_num.port_number = 5;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-
-	in.req_type = DP_POWER_DOWN_PHY;
-	in.u.port_num.port_number = 5;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-
-	in.req_type = DP_ALLOCATE_PAYLOAD;
-	in.u.allocate_payload.number_sdp_streams = 3;
-	for (i = 0; i < in.u.allocate_payload.number_sdp_streams; i++)
-		in.u.allocate_payload.sdp_stream_sink[i] = i + 1;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.allocate_payload.port_number = 0xf;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.allocate_payload.vcpi = 0x7f;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.allocate_payload.pbn = U16_MAX;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-
-	in.req_type = DP_QUERY_PAYLOAD;
-	in.u.query_payload.port_number = 0xf;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.query_payload.vcpi = 0x7f;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-
-	in.req_type = DP_REMOTE_DPCD_READ;
-	in.u.dpcd_read.port_number = 0xf;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.dpcd_read.dpcd_address = 0xfedcb;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.dpcd_read.num_bytes = U8_MAX;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-
-	in.req_type = DP_REMOTE_DPCD_WRITE;
-	in.u.dpcd_write.port_number = 0xf;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.dpcd_write.dpcd_address = 0xfedcb;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.dpcd_write.num_bytes = ARRAY_SIZE(data);
-	in.u.dpcd_write.bytes = data;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-
-	in.req_type = DP_REMOTE_I2C_READ;
-	in.u.i2c_read.port_number = 0xf;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.i2c_read.read_i2c_device_id = 0x7f;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.i2c_read.num_transactions = 3;
-	in.u.i2c_read.num_bytes_read = ARRAY_SIZE(data) * 3;
-	for (i = 0; i < in.u.i2c_read.num_transactions; i++) {
-		in.u.i2c_read.transactions[i].bytes = data;
-		in.u.i2c_read.transactions[i].num_bytes = ARRAY_SIZE(data);
-		in.u.i2c_read.transactions[i].i2c_dev_id = 0x7f & ~i;
-		in.u.i2c_read.transactions[i].i2c_transaction_delay = 0xf & ~i;
-	}
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-
-	in.req_type = DP_REMOTE_I2C_WRITE;
-	in.u.i2c_write.port_number = 0xf;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.i2c_write.write_i2c_device_id = 0x7f;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.i2c_write.num_bytes = ARRAY_SIZE(data);
-	in.u.i2c_write.bytes = data;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-
-	in.req_type = DP_QUERY_STREAM_ENC_STATUS;
-	in.u.enc_status.stream_id = 1;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	get_random_bytes(in.u.enc_status.client_id,
-			 sizeof(in.u.enc_status.client_id));
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.enc_status.stream_event = 3;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.enc_status.valid_stream_event = 0;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.enc_status.stream_behavior = 3;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
-	in.u.enc_status.valid_stream_behavior = 1;
-	KUNIT_EXPECT_TRUE(test, sideband_msg_req_encode_decode(&in));
+	strcpy(desc, t->desc);
 }
+
+KUNIT_ARRAY_PARAM(drm_dp_mst_sideband_msg_req, drm_dp_mst_sideband_msg_req_cases,
+		  drm_dp_mst_sideband_msg_req_desc);
 
 static struct kunit_case drm_dp_mst_helper_tests[] = {
-	KUNIT_CASE(drm_test_dp_mst_calc_pbn_mode),
-	KUNIT_CASE(drm_test_dp_mst_sideband_msg_req_decode),
+	KUNIT_CASE_PARAM(drm_test_dp_mst_calc_pbn_mode, drm_dp_mst_calc_pbn_mode_gen_params),
+	KUNIT_CASE_PARAM(drm_test_dp_mst_sideband_msg_req_decode,
+			 drm_dp_mst_sideband_msg_req_gen_params),
 	{ }
 };
 

drivers/gpu/drm/tiny/Kconfig

···
 	 This is a KMS driver for projectors which use the GM12U320 chipset
 	 for video transfer over USB2/3, such as the Acer C120 mini projector.
 
+config DRM_OFDRM
+	tristate "Open Firmware display driver"
+	depends on DRM && OF && (PPC || COMPILE_TEST)
+	select APERTURE_HELPERS
+	select DRM_GEM_SHMEM_HELPER
+	select DRM_KMS_HELPER
+	help
+	  DRM driver for Open Firmware framebuffers.
+
+	  This driver assumes that the display hardware has been initialized
+	  by the Open Firmware before the kernel boots. Scanout buffer, size,
+	  and display format must be provided via device tree.
+
 config DRM_PANEL_MIPI_DBI
 	tristate "DRM support for MIPI DBI compatible panels"
 	depends on DRM && SPI

drivers/gpu/drm/tiny/Makefile

···
 obj-$(CONFIG_DRM_BOCHS)			+= bochs.o
 obj-$(CONFIG_DRM_CIRRUS_QEMU)		+= cirrus.o
 obj-$(CONFIG_DRM_GM12U320)		+= gm12u320.o
+obj-$(CONFIG_DRM_OFDRM)			+= ofdrm.o
 obj-$(CONFIG_DRM_PANEL_MIPI_DBI)	+= panel-mipi-dbi.o
 obj-$(CONFIG_DRM_SIMPLEDRM)		+= simpledrm.o
 obj-$(CONFIG_TINYDRM_HX8357D)		+= hx8357d.o

drivers/gpu/drm/tiny/bochs.c

···
 	bochs->dev->mode_config.max_width = 8192;
 	bochs->dev->mode_config.max_height = 8192;
 
-	bochs->dev->mode_config.fb_base = bochs->fb_base;
 	bochs->dev->mode_config.preferred_depth = 24;
 	bochs->dev->mode_config.prefer_shadow = 0;
 	bochs->dev->mode_config.prefer_shadow_fbdev = 1;

drivers/gpu/drm/tiny/ofdrm.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/of_address.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_aperture.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_device.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_format_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_gem_shmem_helper.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#define DRIVER_NAME	"ofdrm"
+#define DRIVER_DESC	"DRM driver for OF platform devices"
+#define DRIVER_DATE	"20220501"
+#define DRIVER_MAJOR	1
+#define DRIVER_MINOR	0
+
+#define PCI_VENDOR_ID_ATI_R520	0x7100
+#define PCI_VENDOR_ID_ATI_R600	0x9400
+
+#define OFDRM_GAMMA_LUT_SIZE	256
+
+/* Definitions used by the Avivo palette  */
+#define AVIVO_DC_LUT_RW_SELECT                  0x6480
+#define AVIVO_DC_LUT_RW_MODE                    0x6484
+#define AVIVO_DC_LUT_RW_INDEX                   0x6488
+#define AVIVO_DC_LUT_SEQ_COLOR                  0x648c
+#define AVIVO_DC_LUT_PWL_DATA                   0x6490
+#define AVIVO_DC_LUT_30_COLOR                   0x6494
+#define AVIVO_DC_LUT_READ_PIPE_SELECT           0x6498
+#define AVIVO_DC_LUT_WRITE_EN_MASK              0x649c
+#define AVIVO_DC_LUT_AUTOFILL                   0x64a0
+#define AVIVO_DC_LUTA_CONTROL                   0x64c0
+#define AVIVO_DC_LUTA_BLACK_OFFSET_BLUE         0x64c4
+#define AVIVO_DC_LUTA_BLACK_OFFSET_GREEN        0x64c8
+#define AVIVO_DC_LUTA_BLACK_OFFSET_RED          0x64cc
+#define AVIVO_DC_LUTA_WHITE_OFFSET_BLUE         0x64d0
+#define AVIVO_DC_LUTA_WHITE_OFFSET_GREEN        0x64d4
+#define AVIVO_DC_LUTA_WHITE_OFFSET_RED          0x64d8
+#define AVIVO_DC_LUTB_CONTROL                   0x6cc0
+#define AVIVO_DC_LUTB_BLACK_OFFSET_BLUE         0x6cc4
+#define AVIVO_DC_LUTB_BLACK_OFFSET_GREEN        0x6cc8
+#define AVIVO_DC_LUTB_BLACK_OFFSET_RED          0x6ccc
+#define AVIVO_DC_LUTB_WHITE_OFFSET_BLUE         0x6cd0
+#define AVIVO_DC_LUTB_WHITE_OFFSET_GREEN        0x6cd4
+#define AVIVO_DC_LUTB_WHITE_OFFSET_RED          0x6cd8
+
+enum ofdrm_model {
+	OFDRM_MODEL_UNKNOWN,
+	OFDRM_MODEL_MACH64, /* ATI Mach64 */
+	OFDRM_MODEL_RAGE128, /* ATI Rage128 */
+	OFDRM_MODEL_RAGE_M3A, /* ATI Rage Mobility M3 Head A */
+	OFDRM_MODEL_RAGE_M3B, /* ATI Rage Mobility M3 Head B */
+	OFDRM_MODEL_RADEON, /* ATI Radeon */
+	OFDRM_MODEL_GXT2000, /* IBM GXT2000 */
+	OFDRM_MODEL_AVIVO, /* ATI R5xx */
+	OFDRM_MODEL_QEMU, /* QEMU VGA */
+};
+
+/*
+ * Helpers for display nodes
+ */
+
+static int display_get_validated_int(struct drm_device *dev, const char *name, uint32_t value)
+{
+	if (value > INT_MAX) {
+		drm_err(dev, "invalid framebuffer %s of %u\n", name, value);
+		return -EINVAL;
+	}
+	return (int)value;
+}
+
+static int display_get_validated_int0(struct drm_device *dev, const char *name, uint32_t value)
+{
+	if (!value) {
+		drm_err(dev, "invalid framebuffer %s of %u\n", name, value);
+		return -EINVAL;
+	}
+	return display_get_validated_int(dev, name, value);
+}
+
+static const struct drm_format_info *display_get_validated_format(struct drm_device *dev,
+								  u32 depth, bool big_endian)
+{
+	const struct drm_format_info *info;
+	u32 format;
+
+	switch (depth) {
+	case 8:
+		format = drm_mode_legacy_fb_format(8, 8);
+		break;
+	case 15:
+	case 16:
+		format = drm_mode_legacy_fb_format(16, depth);
+		break;
+	case 32:
+		format = drm_mode_legacy_fb_format(32, 24);
+		break;
+	default:
+		drm_err(dev, "unsupported framebuffer depth %u\n", depth);
+		return ERR_PTR(-EINVAL);
+	}
+
+	/*
+	 * DRM formats assume little-endian byte order. Update the format
+	 * if the scanout buffer uses big-endian ordering.
+	 */
+	if (big_endian) {
+		switch (format) {
+		case DRM_FORMAT_XRGB8888:
+			format = DRM_FORMAT_BGRX8888;
+			break;
+		case DRM_FORMAT_ARGB8888:
+			format = DRM_FORMAT_BGRA8888;
+			break;
+		case DRM_FORMAT_RGB565:
+			format = DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN;
+			break;
+		case DRM_FORMAT_XRGB1555:
+			format = DRM_FORMAT_XRGB1555 | DRM_FORMAT_BIG_ENDIAN;
+			break;
+		default:
+			break;
+		}
+	}
+
+	info = drm_format_info(format);
+	if (!info) {
+		drm_err(dev, "cannot find framebuffer format for depth %u\n", depth);
+		return ERR_PTR(-EINVAL);
+	}
+
+	return info;
+}
+
+static int display_read_u32_of(struct drm_device *dev, struct device_node *of_node,
+			       const char *name, u32 *value)
+{
+	int ret = of_property_read_u32(of_node, name, value);
+
+	if (ret)
+		drm_err(dev, "cannot parse framebuffer %s: error %d\n", name, ret);
+	return ret;
+}
+
+static bool display_get_big_endian_of(struct drm_device *dev, struct device_node *of_node)
+{
+	bool big_endian;
+
+#ifdef __BIG_ENDIAN
+	big_endian = true;
+	if (of_get_property(of_node, "little-endian", NULL))
+		big_endian = false;
+#else
+	big_endian = false;
+	if (of_get_property(of_node, "big-endian", NULL))
+		big_endian = true;
+#endif
+
+	return big_endian;
+}
+
+static int display_get_width_of(struct drm_device *dev, struct device_node *of_node)
+{
+	u32 width;
+	int ret = display_read_u32_of(dev, of_node, "width", &width);
+
+	if (ret)
+		return ret;
+	return display_get_validated_int0(dev, "width", width);
+}
+
+static int display_get_height_of(struct drm_device *dev, struct device_node *of_node)
+{
+	u32 height;
+	int ret = display_read_u32_of(dev, of_node, "height", &height);
+
+	if (ret)
+		return ret;
+	return display_get_validated_int0(dev, "height", height);
+}
+
+static int display_get_depth_of(struct drm_device *dev, struct device_node *of_node)
+{
+	u32 depth;
+	int ret = display_read_u32_of(dev, of_node, "depth", &depth);
+
+	if (ret)
+		return ret;
+	return display_get_validated_int0(dev, "depth", depth);
+}
+
+static int display_get_linebytes_of(struct drm_device *dev, struct device_node *of_node)
+{
+	u32 linebytes;
+	int ret = display_read_u32_of(dev, of_node, "linebytes", &linebytes);
+
+	if (ret)
+		return ret;
+	return display_get_validated_int(dev, "linebytes", linebytes);
+}
+
+static u64 display_get_address_of(struct drm_device *dev, struct device_node *of_node)
+{
+	u32 address;
+	int ret;
+
+	/*
+	 * Not all devices provide an address property, it's not
+	 * a bug if this fails. The driver will try to find the
+	 * framebuffer base address from the device's memory regions.
+	 */
+	ret = of_property_read_u32(of_node, "address", &address);
+	if (ret)
+		return OF_BAD_ADDR;
+
+	return address;
+}
+
+static bool is_avivo(__be32 vendor, __be32 device)
+{
+	/* This will match most R5xx */
+	return (vendor == PCI_VENDOR_ID_ATI) &&
+	       ((device >= PCI_VENDOR_ID_ATI_R520 && device < 0x7800) ||
+		(PCI_VENDOR_ID_ATI_R600 >= 0x9400));
+}
+
+static enum ofdrm_model display_get_model_of(struct drm_device *dev, struct device_node *of_node)
+{
+	enum ofdrm_model model = OFDRM_MODEL_UNKNOWN;
+
+	if (of_node_name_prefix(of_node, "ATY,Rage128")) {
+		model = OFDRM_MODEL_RAGE128;
+	} else if (of_node_name_prefix(of_node, "ATY,RageM3pA") ||
+		   of_node_name_prefix(of_node, "ATY,RageM3p12A")) {
+		model = OFDRM_MODEL_RAGE_M3A;
+	} else if (of_node_name_prefix(of_node, "ATY,RageM3pB")) {
+		model = OFDRM_MODEL_RAGE_M3B;
+	} else if (of_node_name_prefix(of_node, "ATY,Rage6")) {
+		model = OFDRM_MODEL_RADEON;
+	} else if (of_node_name_prefix(of_node, "ATY,")) {
+		return OFDRM_MODEL_MACH64;
+	} else if (of_device_is_compatible(of_node, "pci1014,b7") ||
+		   of_device_is_compatible(of_node, "pci1014,21c")) {
+		model = OFDRM_MODEL_GXT2000;
+	} else if (of_node_name_prefix(of_node, "vga,Display-")) {
+		struct device_node *of_parent;
+		const __be32 *vendor_p, *device_p;
+
+		/* Look for AVIVO initialized by SLOF */
+		of_parent = of_get_parent(of_node);
+		vendor_p = of_get_property(of_parent, "vendor-id", NULL);
+		device_p = of_get_property(of_parent, "device-id", NULL);
+		if (vendor_p && device_p && is_avivo(*vendor_p, *device_p))
+			model = OFDRM_MODEL_AVIVO;
+		of_node_put(of_parent);
+	} else if (of_device_is_compatible(of_node, "qemu,std-vga")) {
+		model = OFDRM_MODEL_QEMU;
+	}
+
+	return model;
+}
+
+/*
+ * Open Firmware display device
+ */
+
+struct ofdrm_device;
+
+struct ofdrm_device_funcs {
+	void __iomem *(*cmap_ioremap)(struct ofdrm_device *odev,
+				      struct device_node *of_node,
+				      u64 fb_bas);
+	void (*cmap_write)(struct ofdrm_device *odev, unsigned char index,
+			   unsigned char r, unsigned char g, unsigned char b);
+};
+
+struct ofdrm_device {
+	struct drm_device dev;
+	struct platform_device *pdev;
+
+	const struct ofdrm_device_funcs *funcs;
+
+	/* firmware-buffer settings */
+	struct iosys_map screen_base;
+	struct drm_display_mode mode;
+	const struct drm_format_info *format;
+	unsigned int pitch;
+
+	/* colormap */
+	void __iomem *cmap_base;
+
+	/* modesetting */
+	uint32_t formats[8];
+	struct drm_plane primary_plane;
+	struct drm_crtc crtc;
+	struct drm_encoder encoder;
+	struct drm_connector connector;
+};
+
+static struct ofdrm_device *ofdrm_device_of_dev(struct drm_device *dev)
+{
+	return container_of(dev, struct ofdrm_device, dev);
+}
+
+/*
+ * Hardware
+ */
+
+#if defined(CONFIG_PCI)
+static struct pci_dev *display_get_pci_dev_of(struct drm_device *dev, struct device_node *of_node)
+{
+	const __be32 *vendor_p, *device_p;
+	u32 vendor, device;
+	struct pci_dev *pcidev;
+
+	vendor_p = of_get_property(of_node, "vendor-id", NULL);
+	if (!vendor_p)
+		return ERR_PTR(-ENODEV);
+	vendor = be32_to_cpup(vendor_p);
+
+	device_p = of_get_property(of_node, "device-id", NULL);
+	if (!device_p)
+		return ERR_PTR(-ENODEV);
+	device = be32_to_cpup(device_p);
+
+	pcidev = pci_get_device(vendor, device, NULL);
+	if (!pcidev)
+		return ERR_PTR(-ENODEV);
+
+	return pcidev;
+}
+
+static void ofdrm_pci_release(void *data)
+{
+	struct pci_dev *pcidev = data;
+
+	pci_disable_device(pcidev);
+}
+
+static int ofdrm_device_init_pci(struct ofdrm_device *odev)
+{
+	struct drm_device *dev = &odev->dev;
+	struct platform_device *pdev = to_platform_device(dev->dev);
+	struct device_node *of_node = pdev->dev.of_node;
+	struct pci_dev *pcidev;
+	int ret;
+
+	/*
+	 * Never use pcim_ or other managed helpers on the returned PCI
+	 * device. Otherwise, probing the native driver will fail for
+	 * resource conflicts. PCI-device management has to be tied to
+	 * the lifetime of the platform device until the native driver
+	 * takes over.
+	 */
+	pcidev = display_get_pci_dev_of(dev, of_node);
+	if (IS_ERR(pcidev))
+		return 0; /* no PCI device found; ignore the error */
+
+	ret = pci_enable_device(pcidev);
+	if (ret) {
+		drm_err(dev, "pci_enable_device(%s) failed: %d\n",
+			dev_name(&pcidev->dev), ret);
+		return ret;
+	}
+	ret = devm_add_action_or_reset(&pdev->dev, ofdrm_pci_release, pcidev);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+#else
+static int ofdrm_device_init_pci(struct ofdrm_device *odev)
+{
+	return 0;
+}
+#endif
+
+/*
+ *  OF display settings
+ */
+
+static struct resource *ofdrm_find_fb_resource(struct ofdrm_device *odev,
+					       struct resource *fb_res)
+{
+	struct platform_device *pdev = to_platform_device(odev->dev.dev);
+	struct resource *res, *max_res = NULL;
+	u32 i;
+
+	for (i = 0; pdev->num_resources; ++i) {
+		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
+		if (!res)
+			break; /* all resources processed */
+		if (resource_size(res) < resource_size(fb_res))
+			continue; /* resource too small */
+		if (fb_res->start && resource_contains(res, fb_res))
+			return res; /* resource contains framebuffer */
+		if (!max_res || resource_size(res) > resource_size(max_res))
+			max_res = res; /* store largest resource as fallback */
+	}
+
+	return max_res;
+}
+
+/*
+ * Colormap / Palette
+ */
+
+static void __iomem *get_cmap_address_of(struct ofdrm_device *odev, struct device_node *of_node,
+					 int bar_no, unsigned long offset, unsigned long size)
+{
+	struct drm_device *dev = &odev->dev;
+	const __be32 *addr_p;
+	u64 max_size, address;
+	unsigned int flags;
+	void __iomem *mem;
+
+	addr_p = of_get_pci_address(of_node, bar_no, &max_size, &flags);
+	if (!addr_p)
+		addr_p = of_get_address(of_node, bar_no, &max_size, &flags);
+	if (!addr_p)
+		return ERR_PTR(-ENODEV);
+
+	if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
+		return ERR_PTR(-ENODEV);
+
+	if ((offset + size) >= max_size)
+		return ERR_PTR(-ENODEV);
+
+	address = of_translate_address(of_node, addr_p);
+	if (address == OF_BAD_ADDR)
+		return ERR_PTR(-ENODEV);
+
+	mem = devm_ioremap(dev->dev, address + offset, size);
+	if (!mem)
+		return ERR_PTR(-ENOMEM);
+
+	return mem;
+}
+
+static void __iomem *ofdrm_mach64_cmap_ioremap(struct ofdrm_device *odev,
+					       struct device_node *of_node,
+					       u64 fb_base)
+{
+	struct drm_device *dev = &odev->dev;
+	u64 address;
+	void __iomem *cmap_base;
+
+	address = fb_base & 0xff000000ul;
+	address += 0x7ff000;
+
+	cmap_base = devm_ioremap(dev->dev, address, 0x1000);
+	if (!cmap_base)
+		return ERR_PTR(-ENOMEM);
+
+	return cmap_base;
+}
+
+static void ofdrm_mach64_cmap_write(struct ofdrm_device *odev, unsigned char index,
+				    unsigned char r, unsigned char g, unsigned char b)
+{
+	void __iomem *addr = odev->cmap_base + 0xcc0;
+	void __iomem *data = odev->cmap_base + 0xcc0 + 1;
+
+	writeb(index, addr);
+	writeb(r, data);
+	writeb(g, data);
+	writeb(b, data);
+}
+
+static void __iomem *ofdrm_rage128_cmap_ioremap(struct ofdrm_device *odev,
+						struct device_node *of_node,
+						u64 fb_base)
+{
+	return get_cmap_address_of(odev, of_node, 2, 0, 0x1fff);
+}
+
+static void ofdrm_rage128_cmap_write(struct ofdrm_device *odev, unsigned char index,
+				     unsigned char r, unsigned char g, unsigned char b)
+{
+	void __iomem *addr = odev->cmap_base + 0xb0;
+	void __iomem *data = odev->cmap_base + 0xb4;
+	u32 color = (r << 16) | (g << 8) | b;
+
+	writeb(index, addr);
+	writel(color, data);
+}
+
+static void __iomem *ofdrm_rage_m3a_cmap_ioremap(struct ofdrm_device *odev,
+						 struct device_node *of_node,
+						 u64 fb_base)
+{
+	return get_cmap_address_of(odev, of_node, 2, 0, 0x1fff);
+}
+
+static void ofdrm_rage_m3a_cmap_write(struct ofdrm_device *odev, unsigned char index,
+				      unsigned char r, unsigned char g, unsigned char b)
+{
+	void __iomem *dac_ctl = odev->cmap_base + 0x58;
+	void __iomem *addr = odev->cmap_base + 0xb0;
+	void __iomem *data = odev->cmap_base + 0xb4;
+	u32 color = (r << 16) | (g << 8) | b;
+	u32 val;
+
+	/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
+	val = readl(dac_ctl);
+	val &= ~0x20;
+	writel(val, dac_ctl);
+
+	/* Set color at palette index */
+	writeb(index, addr);
+	writel(color, data);
+}
+
+static void __iomem *ofdrm_rage_m3b_cmap_ioremap(struct ofdrm_device *odev,
+						 struct device_node *of_node,
+						 u64 fb_base)
+{
+	return get_cmap_address_of(odev, of_node, 2, 0, 0x1fff);
+}
+
+static void ofdrm_rage_m3b_cmap_write(struct ofdrm_device *odev, unsigned char index,
+				      unsigned char r, unsigned char g, unsigned char b)
+{
+	void __iomem *dac_ctl = odev->cmap_base + 0x58;
+	void __iomem *addr = odev->cmap_base + 0xb0;
+	void __iomem *data = odev->cmap_base + 0xb4;
+	u32 color = (r << 16) | (g << 8) | b;
+	u32 val;
+
+	/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
+	val = readl(dac_ctl);
+	val |= 0x20;
+	writel(val, dac_ctl);
+
+	/* Set color at palette index */
+	writeb(index, addr);
+	writel(color, data);
+}
+
+static void __iomem *ofdrm_radeon_cmap_ioremap(struct ofdrm_device *odev,
+					       struct device_node *of_node,
+					       u64 fb_base)
+{
+	return get_cmap_address_of(odev, of_node, 1, 0, 0x1fff);
+}
+
+static void __iomem *ofdrm_gxt2000_cmap_ioremap(struct ofdrm_device *odev,
+						struct device_node *of_node,
+						u64 fb_base)
+{
+	return get_cmap_address_of(odev, of_node, 0, 0x6000, 0x1000);
+}
+
+static void ofdrm_gxt2000_cmap_write(struct ofdrm_device *odev, unsigned char index,
+				     unsigned char r, unsigned char g, unsigned char b)
+{
+	void __iomem *data = ((unsigned int __iomem *)odev->cmap_base) + index;
+	u32 color = (r << 16) | (g << 8) | b;
+
+	writel(color, data);
+}
+
+static void __iomem *ofdrm_avivo_cmap_ioremap(struct ofdrm_device *odev,
+					      struct device_node *of_node,
+					      u64 fb_base)
+{
+	struct device_node *of_parent;
+	void __iomem *cmap_base;
+
+	of_parent = of_get_parent(of_node);
+	cmap_base = get_cmap_address_of(odev, of_parent, 0, 0, 0x10000);
+	of_node_put(of_parent);
+
+	return cmap_base;
+}
+
+static void ofdrm_avivo_cmap_write(struct ofdrm_device *odev, unsigned char index,
+				   unsigned char r, unsigned char g, unsigned char b)
+{
+	void __iomem *lutsel = odev->cmap_base + AVIVO_DC_LUT_RW_SELECT;
+	void __iomem *addr = odev->cmap_base + AVIVO_DC_LUT_RW_INDEX;
+	void __iomem *data = odev->cmap_base + AVIVO_DC_LUT_30_COLOR;
+	u32 color = (r << 22) | (g << 12) | (b << 2);
+
+	/* Write to both LUTs for now */
+
+	writel(1, lutsel);
+	writeb(index, addr);
+	writel(color, data);
+
+	writel(0, lutsel);
+	writeb(index, addr);
+	writel(color, data);
+}
+
+static void __iomem *ofdrm_qemu_cmap_ioremap(struct ofdrm_device *odev,
+					     struct device_node *of_node,
+					     u64 fb_base)
+{
+	static const __be32 io_of_addr[3] = {
+		cpu_to_be32(0x01000000),
+		cpu_to_be32(0x00),
+		cpu_to_be32(0x00),
+	};
+
+	struct drm_device *dev = &odev->dev;
+	u64 address;
+	void __iomem *cmap_base;
+
+	address = of_translate_address(of_node, io_of_addr);
+	if (address == OF_BAD_ADDR)
+		return ERR_PTR(-ENODEV);
+
+	cmap_base = devm_ioremap(dev->dev, address + 0x3c8, 2);
+	if (!cmap_base)
+		return ERR_PTR(-ENOMEM);
+
+	return cmap_base;
+}
+
+static void ofdrm_qemu_cmap_write(struct ofdrm_device *odev, unsigned char index,
+				  unsigned char r, unsigned char g, unsigned char b)
+{
+	void __iomem *addr = odev->cmap_base;
+	void __iomem *data = odev->cmap_base + 1;
+
+	writeb(index, addr);
+	writeb(r, data);
+	writeb(g, data);
+	writeb(b, data);
+}
+
+static void ofdrm_device_set_gamma_linear(struct ofdrm_device *odev,
+					  const struct drm_format_info *format)
+{
+	struct drm_device *dev = &odev->dev;
+	int i;
+
+	switch (format->format) {
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN:
+		/* Use better interpolation, to take 32 values from 0 to 255 */
+		for (i = 0; i < OFDRM_GAMMA_LUT_SIZE / 8; i++) {
+			unsigned char r = i * 8 + i / 4;
+			unsigned char g = i * 4 + i / 16;
+			unsigned char b = i * 8 + i / 4;
+
+			odev->funcs->cmap_write(odev, i, r, g, b);
+		}
+		/* Green has one more bit, so add padding with 0 for red and blue. */
+		for (i = OFDRM_GAMMA_LUT_SIZE / 8; i < OFDRM_GAMMA_LUT_SIZE / 4; i++) {
+			unsigned char r = 0;
+			unsigned char g = i * 4 + i / 16;
+			unsigned char b = 0;
+
+			odev->funcs->cmap_write(odev, i, r, g, b);
+		}
+		break;
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_BGRX8888:
+		for (i = 0; i < OFDRM_GAMMA_LUT_SIZE; i++)
+			odev->funcs->cmap_write(odev, i, i, i, i);
+		break;
+	default:
+		drm_warn_once(dev, "Unsupported format %p4cc for gamma correction\n",
+			      &format->format);
+		break;
+	}
+}
+
+static void ofdrm_device_set_gamma(struct ofdrm_device *odev,
+				   const struct drm_format_info *format,
+				   struct drm_color_lut *lut)
+{
+	struct drm_device *dev = &odev->dev;
+	int i;
+
+	switch (format->format) {
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN:
+		/* Use better interpolation, to take 32 values from lut[0] to lut[255] */
+		for (i = 0; i < OFDRM_GAMMA_LUT_SIZE / 8; i++) {
+			unsigned char r = lut[i * 8 + i / 4].red >> 8;
+			unsigned char g = lut[i * 4 + i / 16].green >> 8;
+			unsigned char b = lut[i * 8 + i / 4].blue >> 8;
+
+			odev->funcs->cmap_write(odev, i, r, g, b);
+		}
+		/* Green has one more bit, so add padding with 0 for red and blue. */
+		for (i = OFDRM_GAMMA_LUT_SIZE / 8; i < OFDRM_GAMMA_LUT_SIZE / 4; i++) {
+			unsigned char r = 0;
+			unsigned char g = lut[i * 4 + i / 16].green >> 8;
+			unsigned char b = 0;
+
+			odev->funcs->cmap_write(odev, i, r, g, b);
+		}
+		break;
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_BGRX8888:
+		for (i = 0; i < OFDRM_GAMMA_LUT_SIZE; i++) {
+			unsigned char r = lut[i].red >> 8;
+			unsigned char g = lut[i].green >> 8;
+			unsigned char b = lut[i].blue >> 8;
+
+			odev->funcs->cmap_write(odev, i, r, g, b);
+		}
+		break;
+	default:
+		drm_warn_once(dev, "Unsupported format %p4cc for gamma correction\n",
+			      &format->format);
+		break;
+	}
+}
+
+/*
+ * Modesetting
+ */
+
+struct ofdrm_crtc_state {
+	struct drm_crtc_state base;
+
+	/* Primary-plane format; required for color mgmt. */
+	const struct drm_format_info *format;
+};
+
+static struct ofdrm_crtc_state *to_ofdrm_crtc_state(struct drm_crtc_state *base)
+{
+	return container_of(base, struct ofdrm_crtc_state, base);
+}
+
+static void ofdrm_crtc_state_destroy(struct ofdrm_crtc_state *ofdrm_crtc_state)
+{
+	__drm_atomic_helper_crtc_destroy_state(&ofdrm_crtc_state->base);
+	kfree(ofdrm_crtc_state);
+}
+
+/*
+ * Support all formats of OF display and maybe more; in order
+ * of preference. The display's update function will do any
+ * conversion necessary.
+ *
+ * TODO: Add blit helpers for remaining formats and uncomment
+ *       constants.
+ */
+static const uint32_t ofdrm_primary_plane_formats[] = {
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_RGB565,
+	//DRM_FORMAT_XRGB1555,
+	//DRM_FORMAT_C8,
+	/* Big-endian formats below */
+	DRM_FORMAT_BGRX8888,
+	DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN,
+};
+
+static const uint64_t ofdrm_primary_plane_format_modifiers[] = {
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
+static int ofdrm_primary_plane_helper_atomic_check(struct drm_plane *plane,
+						   struct drm_atomic_state *new_state)
+{
+	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(new_state, plane);
+	struct drm_framebuffer *new_fb = new_plane_state->fb;
+	struct drm_crtc *new_crtc = new_plane_state->crtc;
+	struct drm_crtc_state *new_crtc_state = NULL;
+	struct ofdrm_crtc_state *new_ofdrm_crtc_state;
+	int ret;
+
+	if (new_crtc)
+		new_crtc_state = drm_atomic_get_new_crtc_state(new_state, new_plane_state->crtc);
+
+	ret = drm_atomic_helper_check_plane_state(new_plane_state, new_crtc_state,
+						  DRM_PLANE_NO_SCALING,
+						  DRM_PLANE_NO_SCALING,
+						  false, false);
+	if (ret)
+		return ret;
+	else if (!new_plane_state->visible)
+		return 0;
+
+	new_crtc_state = drm_atomic_get_new_crtc_state(new_state, new_plane_state->crtc);
+
+	new_ofdrm_crtc_state = to_ofdrm_crtc_state(new_crtc_state);
+	new_ofdrm_crtc_state->format = new_fb->format;
+
+	return 0;
+}
+
+static void ofdrm_primary_plane_helper_atomic_update(struct drm_plane *plane,
+						     struct drm_atomic_state *state)
+{
+	struct drm_device *dev = plane->dev;
+	struct ofdrm_device *odev = ofdrm_device_of_dev(dev);
+	struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
+	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
+	struct drm_framebuffer *fb = plane_state->fb;
+	unsigned int dst_pitch = odev->pitch;
+	const struct drm_format_info *dst_format = odev->format;
+	struct drm_atomic_helper_damage_iter iter;
+	struct drm_rect damage;
+	int ret, idx;
+
+	ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
+	if (ret)
+		return;
+
+	if (!drm_dev_enter(dev, &idx))
+		goto out_drm_gem_fb_end_cpu_access;
+
+	drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
+	drm_atomic_for_each_plane_damage(&iter, &damage) {
+		struct iosys_map dst = odev->screen_base;
+		struct drm_rect dst_clip = plane_state->dst;
+
+		if (!drm_rect_intersect(&dst_clip, &damage))
+			continue;
+
+		iosys_map_incr(&dst, drm_fb_clip_offset(dst_pitch, dst_format, &dst_clip));
+		drm_fb_blit(&dst, &dst_pitch, dst_format->format, shadow_plane_state->data, fb,
+			    &damage);
+	}
+
+	drm_dev_exit(idx);
+out_drm_gem_fb_end_cpu_access:
+	drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
+}
+
+static void ofdrm_primary_plane_helper_atomic_disable(struct drm_plane *plane,
+						      struct drm_atomic_state *state)
+{
+	struct drm_device *dev = plane->dev;
+	struct ofdrm_device *odev = ofdrm_device_of_dev(dev);
+	struct iosys_map dst = odev->screen_base;
+	struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
+	void __iomem *dst_vmap = dst.vaddr_iomem; /* TODO: Use mapping abstraction */
+	unsigned int dst_pitch = odev->pitch;
+	const struct drm_format_info *dst_format = odev->format;
+	struct drm_rect dst_clip;
+	unsigned long lines, linepixels, i;
+	int idx;
+
+	drm_rect_init(&dst_clip,
+		      plane_state->src_x >> 16, plane_state->src_y >> 16,
+		      plane_state->src_w >> 16, plane_state->src_h >> 16);
+
+	lines = drm_rect_height(&dst_clip);
+	linepixels = drm_rect_width(&dst_clip);
+
+	if (!drm_dev_enter(dev, &idx))
+		return;
+
+	/* Clear buffer to black if disabled */
+	dst_vmap += drm_fb_clip_offset(dst_pitch, dst_format, &dst_clip);
+	for (i = 0; i < lines; ++i) {
+		memset_io(dst_vmap, 0, linepixels * dst_format->cpp[0]);
+		dst_vmap += dst_pitch;
+	}
+
+	drm_dev_exit(idx);
+}
+
+static const struct drm_plane_helper_funcs ofdrm_primary_plane_helper_funcs = {
+	DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
+	.atomic_check = ofdrm_primary_plane_helper_atomic_check,
+	.atomic_update = ofdrm_primary_plane_helper_atomic_update,
+	.atomic_disable = ofdrm_primary_plane_helper_atomic_disable,
+};
+
+static const struct drm_plane_funcs ofdrm_primary_plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = drm_plane_cleanup,
+	DRM_GEM_SHADOW_PLANE_FUNCS,
+};
+
+static enum drm_mode_status ofdrm_crtc_helper_mode_valid(struct drm_crtc *crtc,
+							 const struct drm_display_mode *mode)
+{
+	struct ofdrm_device *odev = ofdrm_device_of_dev(crtc->dev);
+
+	return drm_crtc_helper_mode_valid_fixed(crtc, mode, &odev->mode);
+}
+
+static int ofdrm_crtc_helper_atomic_check(struct drm_crtc *crtc,
+					  struct drm_atomic_state *new_state)
+{
+	static const size_t gamma_lut_length = OFDRM_GAMMA_LUT_SIZE * sizeof(struct drm_color_lut);
+
+	struct drm_device *dev = crtc->dev;
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
+	int ret;
+
+	if (!new_crtc_state->enable)
+		return 0;
+
+	ret = drm_atomic_helper_check_crtc_primary_plane(new_crtc_state);
+	if (ret)
+		return ret;
+
+	if (new_crtc_state->color_mgmt_changed) {
+		struct drm_property_blob *gamma_lut = new_crtc_state->gamma_lut;
+
+		if (gamma_lut && (gamma_lut->length != gamma_lut_length)) {
+			drm_dbg(dev, "Incorrect gamma_lut length %zu\n", gamma_lut->length);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static void ofdrm_crtc_helper_atomic_flush(struct drm_crtc *crtc, struct drm_atomic_state *state)
+{
+	struct ofdrm_device *odev = ofdrm_device_of_dev(crtc->dev);
+	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+	struct ofdrm_crtc_state *ofdrm_crtc_state = to_ofdrm_crtc_state(crtc_state);
+
+	if (crtc_state->enable && crtc_state->color_mgmt_changed) {
+		const struct drm_format_info *format = ofdrm_crtc_state->format;
+
+		if (crtc_state->gamma_lut)
+			ofdrm_device_set_gamma(odev, format, crtc_state->gamma_lut->data);
+		else
+			ofdrm_device_set_gamma_linear(odev, format);
+	}
+}
+
+/*
+ * The CRTC is always enabled. Screen updates are performed by
+ * the primary plane's atomic_update function. Disabling clears
+ * the screen in the primary plane's atomic_disable function.
+ */
+static const struct drm_crtc_helper_funcs ofdrm_crtc_helper_funcs = {
+	.mode_valid = ofdrm_crtc_helper_mode_valid,
+	.atomic_check = ofdrm_crtc_helper_atomic_check,
+	.atomic_flush = ofdrm_crtc_helper_atomic_flush,
+};
+
+static void ofdrm_crtc_reset(struct drm_crtc *crtc)
+{
+	struct ofdrm_crtc_state *ofdrm_crtc_state =
+		kzalloc(sizeof(*ofdrm_crtc_state), GFP_KERNEL);
+
+	if (crtc->state)
+		ofdrm_crtc_state_destroy(to_ofdrm_crtc_state(crtc->state));
+
+	if (ofdrm_crtc_state)
+		__drm_atomic_helper_crtc_reset(crtc, &ofdrm_crtc_state->base);
+	else
+		__drm_atomic_helper_crtc_reset(crtc, NULL);
+}
+
+static struct drm_crtc_state *ofdrm_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_crtc_state *crtc_state = crtc->state;
+	struct ofdrm_crtc_state *new_ofdrm_crtc_state;
+	struct ofdrm_crtc_state *ofdrm_crtc_state;
+
+	if (drm_WARN_ON(dev, !crtc_state))
+		return NULL;
+
+	new_ofdrm_crtc_state = kzalloc(sizeof(*new_ofdrm_crtc_state), GFP_KERNEL);
+	if (!new_ofdrm_crtc_state)
+		return NULL;
+
+	ofdrm_crtc_state = to_ofdrm_crtc_state(crtc_state);
+
+	__drm_atomic_helper_crtc_duplicate_state(crtc, &new_ofdrm_crtc_state->base);
+	new_ofdrm_crtc_state->format = ofdrm_crtc_state->format;
+
+	return &new_ofdrm_crtc_state->base;
+}
+
+static void ofdrm_crtc_atomic_destroy_state(struct drm_crtc *crtc,
+					    struct drm_crtc_state *crtc_state)
+{
+	ofdrm_crtc_state_destroy(to_ofdrm_crtc_state(crtc_state));
+}
+
+static const struct drm_crtc_funcs ofdrm_crtc_funcs = {
+	.reset = ofdrm_crtc_reset,
+	.destroy = drm_crtc_cleanup,
+	.set_config = drm_atomic_helper_set_config,
+	.page_flip = drm_atomic_helper_page_flip,
+	.atomic_duplicate_state = ofdrm_crtc_atomic_duplicate_state,
+	.atomic_destroy_state = ofdrm_crtc_atomic_destroy_state,
+};
+
+static int ofdrm_connector_helper_get_modes(struct drm_connector *connector)
+{
+	struct ofdrm_device *odev = ofdrm_device_of_dev(connector->dev);
+
+	return drm_connector_helper_get_modes_fixed(connector, &odev->mode);
+}
+
+static const struct drm_connector_helper_funcs ofdrm_connector_helper_funcs = {
+	.get_modes = ofdrm_connector_helper_get_modes,
+};
+
+static const struct drm_connector_funcs ofdrm_connector_funcs = {
+	.reset = drm_atomic_helper_connector_reset,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static const struct drm_mode_config_funcs ofdrm_mode_config_funcs = {
+	.fb_create = drm_gem_fb_create_with_dirty,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+/*
+ * Init / Cleanup
+ */
+
+static const struct ofdrm_device_funcs ofdrm_unknown_device_funcs = {
+};
+
+static const struct ofdrm_device_funcs ofdrm_mach64_device_funcs = {
+	.cmap_ioremap = ofdrm_mach64_cmap_ioremap,
+	.cmap_write = ofdrm_mach64_cmap_write,
+};
+
+static const struct ofdrm_device_funcs ofdrm_rage128_device_funcs = {
+	.cmap_ioremap = ofdrm_rage128_cmap_ioremap,
+	.cmap_write = ofdrm_rage128_cmap_write,
+};
+
+static const struct ofdrm_device_funcs ofdrm_rage_m3a_device_funcs = {
+	.cmap_ioremap = ofdrm_rage_m3a_cmap_ioremap,
+	.cmap_write = ofdrm_rage_m3a_cmap_write,
+};
+
+static const struct ofdrm_device_funcs ofdrm_rage_m3b_device_funcs = {
+	.cmap_ioremap = ofdrm_rage_m3b_cmap_ioremap,
+	.cmap_write = ofdrm_rage_m3b_cmap_write,
+};
+
+static const struct ofdrm_device_funcs ofdrm_radeon_device_funcs = {
+	.cmap_ioremap = ofdrm_radeon_cmap_ioremap,
+	.cmap_write = ofdrm_rage128_cmap_write, /* same as Rage128 */
+};
+
+static const struct ofdrm_device_funcs ofdrm_gxt2000_device_funcs = {
+	.cmap_ioremap = ofdrm_gxt2000_cmap_ioremap,
+	.cmap_write = ofdrm_gxt2000_cmap_write,
+};
+
+static const struct ofdrm_device_funcs ofdrm_avivo_device_funcs = {
+	.cmap_ioremap = ofdrm_avivo_cmap_ioremap,
+	.cmap_write = ofdrm_avivo_cmap_write,
+};
+
+static const struct ofdrm_device_funcs ofdrm_qemu_device_funcs = {
+	.cmap_ioremap = ofdrm_qemu_cmap_ioremap,
+	.cmap_write = ofdrm_qemu_cmap_write,
+};
+
+static struct drm_display_mode ofdrm_mode(unsigned int width, unsigned int height)
+{
+	/*
+	 * Assume a monitor resolution of 96 dpi to
+	 * get a somewhat reasonable screen size.
+	 */
+	const struct drm_display_mode mode = {
+		DRM_MODE_INIT(60, width, height,
+			      DRM_MODE_RES_MM(width, 96ul),
+			      DRM_MODE_RES_MM(height, 96ul))
+	};
+
+	return mode;
+}
+
+static struct ofdrm_device *ofdrm_device_create(struct drm_driver *drv,
+						struct platform_device *pdev)
+{
+	struct device_node *of_node = pdev->dev.of_node;
+	struct ofdrm_device *odev;
+	struct drm_device *dev;
+	enum ofdrm_model model;
+	bool big_endian;
+	int width, height, depth, linebytes;
+	const struct drm_format_info *format;
+	u64 address;
+	resource_size_t fb_size, fb_base, fb_pgbase, fb_pgsize;
+	struct resource *res, *mem;
+	void __iomem *screen_base;
+	struct drm_plane *primary_plane;
+	struct drm_crtc *crtc;
+	struct drm_encoder *encoder;
+	struct drm_connector *connector;
+	unsigned long max_width, max_height;
+	size_t nformats;
+	int ret;
+
+	odev = devm_drm_dev_alloc(&pdev->dev, drv, struct ofdrm_device, dev);
+	if (IS_ERR(odev))
+		return ERR_CAST(odev);
+	dev = &odev->dev;
+	platform_set_drvdata(pdev, dev);
+
+	ret = ofdrm_device_init_pci(odev);
+	if (ret)
+		return ERR_PTR(ret);
+
+	/*
+	 * OF display-node settings
+	 */
+
+	model = display_get_model_of(dev, of_node);
+	drm_dbg(dev, "detected model %d\n", model);
+
+	switch (model) {
+	case OFDRM_MODEL_UNKNOWN:
+		odev->funcs = &ofdrm_unknown_device_funcs;
+		break;
+	case OFDRM_MODEL_MACH64:
+		odev->funcs = &ofdrm_mach64_device_funcs;
+		break;
+	case OFDRM_MODEL_RAGE128:
+		odev->funcs = &ofdrm_rage128_device_funcs;
+		break;
+	case OFDRM_MODEL_RAGE_M3A:
+		odev->funcs = &ofdrm_rage_m3a_device_funcs;
+		break;
+	case OFDRM_MODEL_RAGE_M3B:
+		odev->funcs = &ofdrm_rage_m3b_device_funcs;
+		break;
+	case OFDRM_MODEL_RADEON:
+		odev->funcs = &ofdrm_radeon_device_funcs;
+		break;
+	case OFDRM_MODEL_GXT2000:
+		odev->funcs = &ofdrm_gxt2000_device_funcs;
+		break;
+	case OFDRM_MODEL_AVIVO:
+		odev->funcs = &ofdrm_avivo_device_funcs;
+		break;
+	case OFDRM_MODEL_QEMU:
+		odev->funcs = &ofdrm_qemu_device_funcs;
+		break;
+	}
+
+	big_endian = display_get_big_endian_of(dev, of_node);
+
+	width = display_get_width_of(dev, of_node);
+	if (width < 0)
+		return ERR_PTR(width);
+	height = display_get_height_of(dev, of_node);
+	if (height < 0)
+		return ERR_PTR(height);
+	depth = display_get_depth_of(dev, of_node);
+	if (depth < 0)
+		return ERR_PTR(depth);
+	linebytes = display_get_linebytes_of(dev, of_node);
+	if (linebytes < 0)
+		return ERR_PTR(linebytes);
+
+	format = display_get_validated_format(dev, depth, big_endian);
+	if (IS_ERR(format))
+		return ERR_CAST(format);
+	if (!linebytes) {
+		linebytes = drm_format_info_min_pitch(format, 0, width);
+		if (drm_WARN_ON(dev, !linebytes))
+			return ERR_PTR(-EINVAL);
+	}
+
+	fb_size = linebytes * height;
+
+	/*
+	 * Try to figure out the address of the framebuffer. Unfortunately, Open
+	 * Firmware doesn't provide a standard way to do so. All we can do is a
+	 * dodgy heuristic that happens to work in practice.
+	 *
+	 * On most machines, the "address" property contains what we need, though
+	 * not on Matrox cards found in IBM machines. What appears to give good
+	 * results is to go through the PCI ranges and pick one that encloses the
+	 * "address" property. If none match, we pick the largest.
+	 */
+	address = display_get_address_of(dev, of_node);
+	if (address != OF_BAD_ADDR) {
+		struct resource fb_res = DEFINE_RES_MEM(address, fb_size);
+
+		res = ofdrm_find_fb_resource(odev, &fb_res);
+		if (!res)
+			return ERR_PTR(-EINVAL);
+		if (resource_contains(res, &fb_res))
+			fb_base = address;
+		else
+			fb_base = res->start;
+	} else {
+		struct resource fb_res = DEFINE_RES_MEM(0u, fb_size);
+
+		res = ofdrm_find_fb_resource(odev, &fb_res);
+		if (!res)
+			return ERR_PTR(-EINVAL);
+		fb_base = res->start;
+	}
+
+	/*
+	 * I/O resources
+	 */
+
+	fb_pgbase = round_down(fb_base, PAGE_SIZE);
+	fb_pgsize = fb_base - fb_pgbase + round_up(fb_size, PAGE_SIZE);
+
+	ret = devm_aperture_acquire_from_firmware(dev, fb_pgbase, fb_pgsize);
+	if (ret) {
+		drm_err(dev, "could not acquire memory range %pr: error %d\n", &res, ret);
+		return ERR_PTR(ret);
+	}
+
+	mem = devm_request_mem_region(&pdev->dev, fb_pgbase, fb_pgsize, drv->name);
+	if (!mem) {
+		drm_warn(dev, "could not acquire memory region %pr\n", &res);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	screen_base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
+	if (!screen_base)
+		return ERR_PTR(-ENOMEM);
+
+	if (odev->funcs->cmap_ioremap) {
+		void __iomem *cmap_base = odev->funcs->cmap_ioremap(odev, of_node, fb_base);
+
+		if (IS_ERR(cmap_base)) {
+			/* Don't fail; continue without colormap */
+			drm_warn(dev, "could not find colormap: error %ld\n", PTR_ERR(cmap_base));
+		} else {
+			odev->cmap_base = cmap_base;
+		}
+	}
+
+	/*
+	 * Firmware framebuffer
+	 */
+
+	iosys_map_set_vaddr_iomem(&odev->screen_base, screen_base);
+	odev->mode = ofdrm_mode(width, height);
+	odev->format = format;
+	odev->pitch = linebytes;
+
+	drm_dbg(dev, "display mode={" DRM_MODE_FMT "}\n", DRM_MODE_ARG(&odev->mode));
+	drm_dbg(dev, "framebuffer format=%p4cc, size=%dx%d, linebytes=%d byte\n",
+		&format->format, width, height, linebytes);
+
+	/*
+	 * Mode-setting pipeline
+	 */
+
+	ret = drmm_mode_config_init(dev);
+	if (ret)
+		return ERR_PTR(ret);
+
+	max_width = max_t(unsigned long, width, DRM_SHADOW_PLANE_MAX_WIDTH);
+	max_height = max_t(unsigned long, height, DRM_SHADOW_PLANE_MAX_HEIGHT);
+
+	dev->mode_config.min_width = width;
+	dev->mode_config.max_width = max_width;
+	dev->mode_config.min_height = height;
+	dev->mode_config.max_height = max_height;
+	dev->mode_config.funcs = &ofdrm_mode_config_funcs;
+	switch (depth) {
+	case 32:
+		dev->mode_config.preferred_depth = 24;
+		break;
+	default:
+		dev->mode_config.preferred_depth = depth;
+		break;
+	}
+	dev->mode_config.quirk_addfb_prefer_host_byte_order = true;
+
+	/* Primary plane */
+
+	nformats = drm_fb_build_fourcc_list(dev, &format->format, 1,
+					    ofdrm_primary_plane_formats,
+					    ARRAY_SIZE(ofdrm_primary_plane_formats),
+					    odev->formats, ARRAY_SIZE(odev->formats));
+
+	primary_plane = &odev->primary_plane;
+	ret = drm_universal_plane_init(dev, primary_plane, 0, &ofdrm_primary_plane_funcs,
+				       odev->formats, nformats,
+				       ofdrm_primary_plane_format_modifiers,
+				       DRM_PLANE_TYPE_PRIMARY, NULL);
+	if (ret)
+		return ERR_PTR(ret);
+	drm_plane_helper_add(primary_plane, &ofdrm_primary_plane_helper_funcs);
+	drm_plane_enable_fb_damage_clips(primary_plane);
+
+	/* CRTC */
+
+	crtc = &odev->crtc;
+	ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL,
+					&ofdrm_crtc_funcs, NULL);
+	if (ret)
+		return ERR_PTR(ret);
+	drm_crtc_helper_add(crtc, &ofdrm_crtc_helper_funcs);
+
+	if (odev->cmap_base) {
+		drm_mode_crtc_set_gamma_size(crtc, OFDRM_GAMMA_LUT_SIZE);
+		drm_crtc_enable_color_mgmt(crtc, 0, false, OFDRM_GAMMA_LUT_SIZE);
+	}
+
+	/* Encoder */
+
+	encoder = &odev->encoder;
+	ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_NONE);
+	if (ret)
+		return ERR_PTR(ret);
+	encoder->possible_crtcs = drm_crtc_mask(crtc);
+
+	/* Connector */
+
+	connector = &odev->connector;
+	ret = drm_connector_init(dev, connector, &ofdrm_connector_funcs,
+				 DRM_MODE_CONNECTOR_Unknown);
+	if (ret)
+		return ERR_PTR(ret);
+	drm_connector_helper_add(connector, &ofdrm_connector_helper_funcs);
+	drm_connector_set_panel_orientation_with_quirk(connector,
+						       DRM_MODE_PANEL_ORIENTATION_UNKNOWN,
+						       width, height);
+
+	ret = drm_connector_attach_encoder(connector, encoder);
+	if (ret)
+		return ERR_PTR(ret);
+
+	drm_mode_config_reset(dev);
+
+	return odev;
+}
+
+/*
+ * DRM driver
+ */
+
+DEFINE_DRM_GEM_FOPS(ofdrm_fops);
+
+static struct drm_driver ofdrm_driver = {
+	DRM_GEM_SHMEM_DRIVER_OPS,
+	.name			= DRIVER_NAME,
+	.desc			= DRIVER_DESC,
+	.date			= DRIVER_DATE,
+	.major			= DRIVER_MAJOR,
+	.minor			= DRIVER_MINOR,
+	.driver_features	= DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
+	.fops			= &ofdrm_fops,
+};
+
+/*
+ * Platform driver
+ */
+
+static int ofdrm_probe(struct platform_device *pdev)
+{
+	struct ofdrm_device *odev;
+	struct drm_device *dev;
+	int ret;
+
+	odev = ofdrm_device_create(&ofdrm_driver, pdev);
+	if (IS_ERR(odev))
+		return PTR_ERR(odev);
+	dev = &odev->dev;
+
+	ret = drm_dev_register(dev, 0);
+	if (ret)
+		return ret;
+
+	/*
+	 * FIXME: 24-bit color depth does not work reliably with a 32-bpp
+	 * value. Force the bpp value of the scanout buffer's format.
+	 */
+	drm_fbdev_generic_setup(dev, drm_format_info_bpp(odev->format, 0));
+
+	return 0;
+}
+
+static int ofdrm_remove(struct platform_device *pdev)
+{
+	struct drm_device *dev = platform_get_drvdata(pdev);
+
+	drm_dev_unplug(dev);
+
+	return 0;
+}
+
+static const struct of_device_id ofdrm_of_match_display[] = {
+	{ .compatible = "display", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, ofdrm_of_match_display);
+
+static struct platform_driver ofdrm_platform_driver = {
+	.driver = {
+		.name = "of-display",
+		.of_match_table = ofdrm_of_match_display,
+	},
+	.probe = ofdrm_probe,
+	.remove = ofdrm_remove,
+};
+
+module_platform_driver(ofdrm_platform_driver);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");

drivers/gpu/drm/tiny/simpledrm.c

···
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_state_helper.h>
 #include <drm/drm_connector.h>
+#include <drm/drm_crtc_helper.h>
 #include <drm/drm_damage_helper.h>
 #include <drm/drm_device.h>
 #include <drm/drm_drv.h>
···
 	return drm_crtc_helper_mode_valid_fixed(crtc, mode, &sdev->mode);
 }
 
-static int simpledrm_crtc_helper_atomic_check(struct drm_crtc *crtc,
-					      struct drm_atomic_state *new_state)
-{
-	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
-	int ret;
-
-	ret = drm_atomic_helper_check_crtc_state(new_crtc_state, false);
-	if (ret)
-		return ret;
-
-	return drm_atomic_add_affected_planes(new_state, crtc);
-}
-
 /*
  * The CRTC is always enabled. Screen updates are performed by
  * the primary plane's atomic_update function. Disabling clears
···
  */
 static const struct drm_crtc_helper_funcs simpledrm_crtc_helper_funcs = {
 	.mode_valid = simpledrm_crtc_helper_mode_valid,
-	.atomic_check = simpledrm_crtc_helper_atomic_check,
+	.atomic_check = drm_crtc_helper_atomic_check,
 };
 
 static const struct drm_crtc_funcs simpledrm_crtc_funcs = {

drivers/gpu/drm/ttm/ttm_range_manager.c

···
 		return ret;
 
 	spin_lock(&rman->lock);
-	drm_mm_clean(mm);
 	drm_mm_takedown(mm);
 	spin_unlock(&rman->lock);
 

drivers/gpu/drm/udl/Makefile

···
 # SPDX-License-Identifier: GPL-2.0-only
-udl-y := udl_drv.o udl_modeset.o udl_connector.o udl_main.o udl_transfer.o
+udl-y := udl_drv.o udl_modeset.o udl_main.o udl_transfer.o
 
 obj-$(CONFIG_DRM_UDL) := udl.o

drivers/gpu/drm/udl/udl_connector.c

···
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2012 Red Hat
- * based in parts on udlfb.c:
- * Copyright (C) 2009 Roberto De Ioris <[e-mail]>
- * Copyright (C) 2009 Jaya Kumar <[e-mail]>
- * Copyright (C) 2009 Bernie Thompson <[e-mail]>
- */
-
-#include <drm/drm_atomic_state_helper.h>
-#include <drm/drm_edid.h>
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_probe_helper.h>
-
-#include "udl_connector.h"
-#include "udl_drv.h"
-
-static int udl_get_edid_block(void *data, u8 *buf, unsigned int block,
-			       size_t len)
-{
-	int ret, i;
-	u8 *read_buff;
-	struct udl_device *udl = data;
-	struct usb_device *udev = udl_to_usb_device(udl);
-
-	read_buff = kmalloc(2, GFP_KERNEL);
-	if (!read_buff)
-		return -1;
-
-	for (i = 0; i < len; i++) {
-		int bval = (i + block * EDID_LENGTH) << 8;
-		ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
-				      0x02, (0x80 | (0x02 << 5)), bval,
-				      0xA1, read_buff, 2, 1000);
-		if (ret < 1) {
-			DRM_ERROR("Read EDID byte %d failed err %x\n", i, ret);
-			kfree(read_buff);
-			return -1;
-		}
-		buf[i] = read_buff[1];
-	}
-
-	kfree(read_buff);
-	return 0;
-}
-
-static int udl_get_modes(struct drm_connector *connector)
-{
-	struct udl_drm_connector *udl_connector =
-					container_of(connector,
-					struct udl_drm_connector,
-					connector);
-
-	drm_connector_update_edid_property(connector, udl_connector->edid);
-	if (udl_connector->edid)
-		return drm_add_edid_modes(connector, udl_connector->edid);
-	return 0;
-}
-
-static enum drm_mode_status udl_mode_valid(struct drm_connector *connector,
-			  struct drm_display_mode *mode)
-{
-	struct udl_device *udl = to_udl(connector->dev);
-	if (!udl->sku_pixel_limit)
-		return 0;
-
-	if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
-		return MODE_VIRTUAL_Y;
-
-	return 0;
-}
-
-static enum drm_connector_status
-udl_detect(struct drm_connector *connector, bool force)
-{
-	struct udl_device *udl = to_udl(connector->dev);
-	struct udl_drm_connector *udl_connector =
-					container_of(connector,
-					struct udl_drm_connector,
-					connector);
-
-	/* cleanup previous edid */
-	if (udl_connector->edid != NULL) {
-		kfree(udl_connector->edid);
-		udl_connector->edid = NULL;
-	}
-
-	udl_connector->edid = drm_do_get_edid(connector, udl_get_edid_block, udl);
-	if (!udl_connector->edid)
-		return connector_status_disconnected;
-
-	return connector_status_connected;
-}
-
-static void udl_connector_destroy(struct drm_connector *connector)
-{
-	struct udl_drm_connector *udl_connector =
-					container_of(connector,
-					struct udl_drm_connector,
-					connector);
-
-	drm_connector_cleanup(connector);
-	kfree(udl_connector->edid);
-	kfree(connector);
-}
-
-static const struct drm_connector_helper_funcs udl_connector_helper_funcs = {
-	.get_modes = udl_get_modes,
-	.mode_valid = udl_mode_valid,
-};
-
-static const struct drm_connector_funcs udl_connector_funcs = {
-	.reset = drm_atomic_helper_connector_reset,
-	.detect = udl_detect,
-	.fill_modes = drm_helper_probe_single_connector_modes,
-	.destroy = udl_connector_destroy,
-	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
-	.atomic_destroy_state   = drm_atomic_helper_connector_destroy_state,
-};
-
-struct drm_connector *udl_connector_init(struct drm_device *dev)
-{
-	struct udl_drm_connector *udl_connector;
-	struct drm_connector *connector;
-
-	udl_connector = kzalloc(sizeof(struct udl_drm_connector), GFP_KERNEL);
-	if (!udl_connector)
-		return ERR_PTR(-ENOMEM);
-
-	connector = &udl_connector->connector;
-	drm_connector_init(dev, connector, &udl_connector_funcs,
-			   DRM_MODE_CONNECTOR_VGA);
-	drm_connector_helper_add(connector, &udl_connector_helper_funcs);
-
-	connector->polled = DRM_CONNECTOR_POLL_HPD |
-		DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
-
-	return connector;
-}

drivers/gpu/drm/udl/udl_connector.h

···
-#ifndef __UDL_CONNECTOR_H__
-#define __UDL_CONNECTOR_H__
-
-#include <drm/drm_crtc.h>
-
-struct edid;
-
-struct udl_drm_connector {
-	struct drm_connector connector;
-	/* last udl_detect edid */
-	struct edid *edid;
-};
-
-
-#endif //__UDL_CONNECTOR_H__

drivers/gpu/drm/udl/udl_drv.h

···
 #include <linux/mm_types.h>
 #include <linux/usb.h>
 
+#include <drm/drm_connector.h>
+#include <drm/drm_crtc.h>
 #include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem.h>
-#include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_plane.h>
 
 struct drm_mode_create_dumb;
 
···
 	size_t size;
 };
 
+struct udl_connector {
+	struct drm_connector connector;
+	/* last udl_detect edid */
+	struct edid *edid;
+};
+
+static inline struct udl_connector *to_udl_connector(struct drm_connector *connector)
+{
+	return container_of(connector, struct udl_connector, connector);
+}
+
 struct udl_device {
 	struct drm_device drm;
 	struct device *dev;
 	struct device *dmadev;
 
-	struct drm_simple_display_pipe display_pipe;
+	struct drm_plane primary_plane;
+	struct drm_crtc crtc;
+	struct drm_encoder encoder;
 
 	struct mutex gem_lock;
 
 	int sku_pixel_limit;
 
 	struct urb_list urbs;
-
-	char mode_buf[1024];
-	uint32_t mode_buf_len;
 };
 
 #define to_udl(x) container_of(x, struct udl_device, drm)
···
 
 int udl_drop_usb(struct drm_device *dev);
 int udl_select_std_channel(struct udl_device *udl);
-
-#define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
-#define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
-#define CMD_WRITE_COPY8  "\xAF\x62" /**< 8 bit copy command. */
-#define CMD_WRITE_RLX8   "\xAF\x63" /**< 8 bit extended run length command. */
-
-#define CMD_WRITE_RAW16  "\xAF\x68" /**< 16 bit raw write command. */
-#define CMD_WRITE_RL16   "\xAF\x69" /**< 16 bit run length command. */
-#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
-#define CMD_WRITE_RLX16  "\xAF\x6B" /**< 16 bit extended run length command. */
-
-/* On/Off for driving the DisplayLink framebuffer to the display */
-#define UDL_REG_BLANK_MODE		0x1f
-
-#define UDL_BLANK_MODE_ON		0x00 /* hsync and vsync on, visible */
-#define UDL_BLANK_MODE_BLANKED		0x01 /* hsync and vsync on, blanked */
-#define UDL_BLANK_MODE_VSYNC_OFF	0x03 /* vsync off, blanked */
-#define UDL_BLANK_MODE_HSYNC_OFF	0x05 /* hsync off, blanked */
-#define UDL_BLANK_MODE_POWERDOWN	0x07 /* powered off; requires modeset */
 
 #endif

drivers/gpu/drm/udl/udl_modeset.c

···
  * Copyright (C) 2009 Bernie Thompson <[e-mail]>
  */
 
+#include <linux/bitfield.h>
+
+#include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_edid.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_gem_atomic_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_gem_shmem_helper.h>
 #include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drm_probe_helper.h>
 #include <drm/drm_vblank.h>
 
 #include "udl_drv.h"
-
-#define UDL_COLOR_DEPTH_16BPP	0
+#include "udl_proto.h"
 
 /*
- * All DisplayLink bulk operations start with 0xAF, followed by specific code
- * All operations are written to buffers which then later get sent to device
+ * All DisplayLink bulk operations start with 0xaf (UDL_MSG_BULK), followed by
+ * a specific command code. All operations are written to a command buffer, which
+ * the driver sends to the device.
  */
 static char *udl_set_register(char *buf, u8 reg, u8 val)
 {
-	*buf++ = 0xAF;
-	*buf++ = 0x20;
+	*buf++ = UDL_MSG_BULK;
+	*buf++ = UDL_CMD_WRITEREG;
 	*buf++ = reg;
 	*buf++ = val;
+
 	return buf;
 }
 
 static char *udl_vidreg_lock(char *buf)
 {
-	return udl_set_register(buf, 0xFF, 0x00);
+	return udl_set_register(buf, UDL_REG_VIDREG, UDL_VIDREG_LOCK);
 }
 
 static char *udl_vidreg_unlock(char *buf)
 {
-	return udl_set_register(buf, 0xFF, 0xFF);
+	return udl_set_register(buf, UDL_REG_VIDREG, UDL_VIDREG_UNLOCK);
 }
 
 static char *udl_set_blank_mode(char *buf, u8 mode)
 {
-	return udl_set_register(buf, UDL_REG_BLANK_MODE, mode);
+	return udl_set_register(buf, UDL_REG_BLANKMODE, mode);
 }
 
 static char *udl_set_color_depth(char *buf, u8 selection)
 {
-	return udl_set_register(buf, 0x00, selection);
+	return udl_set_register(buf, UDL_REG_COLORDEPTH, selection);
 }
 
-static char *udl_set_base16bpp(char *wrptr, u32 base)
+static char *udl_set_base16bpp(char *buf, u32 base)
 {
-	/* the base pointer is 16 bits wide, 0x20 is hi byte. */
-	wrptr = udl_set_register(wrptr, 0x20, base >> 16);
-	wrptr = udl_set_register(wrptr, 0x21, base >> 8);
-	return udl_set_register(wrptr, 0x22, base);
+	/* the base pointer is 24 bits wide, 0x20 is hi byte. */
+	u8 reg20 = FIELD_GET(UDL_BASE_ADDR2_MASK, base);
+	u8 reg21 = FIELD_GET(UDL_BASE_ADDR1_MASK, base);
+	u8 reg22 = FIELD_GET(UDL_BASE_ADDR0_MASK, base);
+
+	buf = udl_set_register(buf, UDL_REG_BASE16BPP_ADDR2, reg20);
+	buf = udl_set_register(buf, UDL_REG_BASE16BPP_ADDR1, reg21);
+	buf = udl_set_register(buf, UDL_REG_BASE16BPP_ADDR0, reg22);
+
+	return buf;
 }
 
 /*
  * DisplayLink HW has separate 16bpp and 8bpp framebuffers.
  * In 24bpp modes, the low 323 RGB bits go in the 8bpp framebuffer
  */
-static char *udl_set_base8bpp(char *wrptr, u32 base)
+static char *udl_set_base8bpp(char *buf, u32 base)
 {
-	wrptr = udl_set_register(wrptr, 0x26, base >> 16);
-	wrptr = udl_set_register(wrptr, 0x27, base >> 8);
-	return udl_set_register(wrptr, 0x28, base);
+	/* the base pointer is 24 bits wide, 0x26 is hi byte. */
+	u8 reg26 = FIELD_GET(UDL_BASE_ADDR2_MASK, base);
+	u8 reg27 = FIELD_GET(UDL_BASE_ADDR1_MASK, base);
+	u8 reg28 = FIELD_GET(UDL_BASE_ADDR0_MASK, base);
+
+	buf = udl_set_register(buf, UDL_REG_BASE8BPP_ADDR2, reg26);
+	buf = udl_set_register(buf, UDL_REG_BASE8BPP_ADDR1, reg27);
+	buf = udl_set_register(buf, UDL_REG_BASE8BPP_ADDR0, reg28);
+
+	return buf;
 }
 
 static char *udl_set_register_16(char *wrptr, u8 reg, u16 value)
···
 }
 
 /*
- * This takes a standard fbdev screeninfo struct and all of its monitor mode
- * details and converts them into the DisplayLink equivalent register commands.
-  ERR(vreg(dev,               0x00, (color_depth == 16) ? 0 : 1));
-  ERR(vreg_lfsr16(dev,        0x01, xDisplayStart));
-  ERR(vreg_lfsr16(dev,        0x03, xDisplayEnd));
-  ERR(vreg_lfsr16(dev,        0x05, yDisplayStart));
-  ERR(vreg_lfsr16(dev,        0x07, yDisplayEnd));
-  ERR(vreg_lfsr16(dev,        0x09, xEndCount));
-  ERR(vreg_lfsr16(dev,        0x0B, hSyncStart));
-  ERR(vreg_lfsr16(dev,        0x0D, hSyncEnd));
-  ERR(vreg_big_endian(dev,    0x0F, hPixels));
-  ERR(vreg_lfsr16(dev,        0x11, yEndCount));
-  ERR(vreg_lfsr16(dev,        0x13, vSyncStart));
-  ERR(vreg_lfsr16(dev,        0x15, vSyncEnd));
-  ERR(vreg_big_endian(dev,    0x17, vPixels));
-  ERR(vreg_little_endian(dev, 0x1B, pixelClock5KHz));
-
-  ERR(vreg(dev,               0x1F, 0));
-
-  ERR(vbuf(dev, WRITE_VIDREG_UNLOCK, DSIZEOF(WRITE_VIDREG_UNLOCK)));
+ * Takes a DRM display mode and converts it into the DisplayLink
+ * equivalent register commands.
  */
-static char *udl_set_vid_cmds(char *wrptr, struct drm_display_mode *mode)
+static char *udl_set_display_mode(char *buf, struct drm_display_mode *mode)
 {
-	u16 xds, yds;
-	u16 xde, yde;
-	u16 yec;
+	u16 reg01 = mode->crtc_htotal - mode->crtc_hsync_start;
+	u16 reg03 = reg01 + mode->crtc_hdisplay;
+	u16 reg05 = mode->crtc_vtotal - mode->crtc_vsync_start;
+	u16 reg07 = reg05 + mode->crtc_vdisplay;
+	u16 reg09 = mode->crtc_htotal - 1;
+	u16 reg0b = 1; /* libdlo hardcodes hsync start to 1 */
+	u16 reg0d = mode->crtc_hsync_end - mode->crtc_hsync_start + 1;
+	u16 reg0f = mode->hdisplay;
+	u16 reg11 = mode->crtc_vtotal;
+	u16 reg13 = 0; /* libdlo hardcodes vsync start to 0 */
+	u16 reg15 = mode->crtc_vsync_end - mode->crtc_vsync_start;
+	u16 reg17 = mode->crtc_vdisplay;
+	u16 reg1b = mode->clock / 5;
 
-	/* x display start */
-	xds = mode->crtc_htotal - mode->crtc_hsync_start;
-	wrptr = udl_set_register_lfsr16(wrptr, 0x01, xds);
-	/* x display end */
-	xde = xds + mode->crtc_hdisplay;
-	wrptr = udl_set_register_lfsr16(wrptr, 0x03, xde);
+	buf = udl_set_register_lfsr16(buf, UDL_REG_XDISPLAYSTART, reg01);
+	buf = udl_set_register_lfsr16(buf, UDL_REG_XDISPLAYEND, reg03);
+	buf = udl_set_register_lfsr16(buf, UDL_REG_YDISPLAYSTART, reg05);
+	buf = udl_set_register_lfsr16(buf, UDL_REG_YDISPLAYEND, reg07);
+	buf = udl_set_register_lfsr16(buf, UDL_REG_XENDCOUNT, reg09);
+	buf = udl_set_register_lfsr16(buf, UDL_REG_HSYNCSTART, reg0b);
+	buf = udl_set_register_lfsr16(buf, UDL_REG_HSYNCEND, reg0d);
+	buf = udl_set_register_16(buf, UDL_REG_HPIXELS, reg0f);
+	buf = udl_set_register_lfsr16(buf, UDL_REG_YENDCOUNT, reg11);
+	buf = udl_set_register_lfsr16(buf, UDL_REG_VSYNCSTART, reg13);
+	buf = udl_set_register_lfsr16(buf, UDL_REG_VSYNCEND, reg15);
+	buf = udl_set_register_16(buf, UDL_REG_VPIXELS, reg17);
+	buf = udl_set_register_16be(buf, UDL_REG_PIXELCLOCK5KHZ, reg1b);
 
-	/* y display start */
-	yds = mode->crtc_vtotal - mode->crtc_vsync_start;
-	wrptr = udl_set_register_lfsr16(wrptr, 0x05, yds);
-	/* y display end */
-	yde = yds + mode->crtc_vdisplay;
-	wrptr = udl_set_register_lfsr16(wrptr, 0x07, yde);
-
-	/* x end count is active + blanking - 1 */
-	wrptr = udl_set_register_lfsr16(wrptr, 0x09,
-					mode->crtc_htotal - 1);
-
-	/* libdlo hardcodes hsync start to 1 */
-	wrptr = udl_set_register_lfsr16(wrptr, 0x0B, 1);
-
-	/* hsync end is width of sync pulse + 1 */
-	wrptr = udl_set_register_lfsr16(wrptr, 0x0D,
-					mode->crtc_hsync_end - mode->crtc_hsync_start + 1);
-
-	/* hpixels is active pixels */
-	wrptr = udl_set_register_16(wrptr, 0x0F, mode->hdisplay);
-
-	/* yendcount is vertical active + vertical blanking */
-	yec = mode->crtc_vtotal;
-	wrptr = udl_set_register_lfsr16(wrptr, 0x11, yec);
-
-	/* libdlo hardcodes vsync start to 0 */
-	wrptr = udl_set_register_lfsr16(wrptr, 0x13, 0);
-
-	/* vsync end is width of vsync pulse */
-	wrptr = udl_set_register_lfsr16(wrptr, 0x15, mode->crtc_vsync_end - mode->crtc_vsync_start);
-
-	/* vpixels is active pixels */
-	wrptr = udl_set_register_16(wrptr, 0x17, mode->crtc_vdisplay);
-
-	wrptr = udl_set_register_16be(wrptr, 0x1B,
-				      mode->clock / 5);
-
-	return wrptr;
+	return buf;
 }
 
 static char *udl_dummy_render(char *wrptr)
 {
-	*wrptr++ = 0xAF;
-	*wrptr++ = 0x6A; /* copy */
+	*wrptr++ = UDL_MSG_BULK;
+	*wrptr++ = UDL_CMD_WRITECOPY16;
 	*wrptr++ = 0x00; /* from addr */
 	*wrptr++ = 0x00;
 	*wrptr++ = 0x00;
···
 	*wrptr++ = 0x00;
 	*wrptr++ = 0x00;
 	return wrptr;
-}
-
-static int udl_crtc_write_mode_to_hw(struct drm_crtc *crtc)
-{
-	struct drm_device *dev = crtc->dev;
-	struct udl_device *udl = to_udl(dev);
-	struct urb *urb;
-	char *buf;
-	int retval;
-
-	if (udl->mode_buf_len == 0) {
-		DRM_ERROR("No mode set\n");
-		return -EINVAL;
-	}
-
-	urb = udl_get_urb(dev);
-	if (!urb)
-		return -ENOMEM;
-
-	buf = (char *)urb->transfer_buffer;
-
-	memcpy(buf, udl->mode_buf, udl->mode_buf_len);
-	retval = udl_submit_urb(dev, urb, udl->mode_buf_len);
-	DRM_DEBUG("write mode info %d\n", udl->mode_buf_len);
-	return retval;
 }
 
 static long udl_log_cpp(unsigned int cpp)
···
 		return ret;
 	log_bpp = ret;
 
-	ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
-	if (ret)
-		return ret;
-
 	urb = udl_get_urb(dev);
-	if (!urb) {
-		ret = -ENOMEM;
-		goto out_drm_gem_fb_end_cpu_access;
-	}
+	if (!urb)
+		return -ENOMEM;
 	cmd = urb->transfer_buffer;
 
 	for (i = clip->y1; i < clip->y2; i++) {
···
 				       &cmd, byte_offset, dev_byte_offset,
 				       byte_width);
 		if (ret)
-			goto out_drm_gem_fb_end_cpu_access;
+			return ret;
 	}
 
 	if (cmd > (char *)urb->transfer_buffer) {
 		/* Send partial buffer remaining before exiting */
 		int len;
 		if (cmd < (char *)urb->transfer_buffer + urb->transfer_buffer_length)
-			*cmd++ = 0xAF;
+			*cmd++ = UDL_MSG_BULK;
 		len = cmd - (char *)urb->transfer_buffer;
 		ret = udl_submit_urb(dev, urb, len);
 	} else {
 		udl_urb_completion(urb);
 	}
 
-	ret = 0;
-
-out_drm_gem_fb_end_cpu_access:
-	drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
-	return ret;
+	return 0;
 }
 
 /*
- * Simple display pipeline
+ * Primary plane
  */
 
-static const uint32_t udl_simple_display_pipe_formats[] = {
+static const uint32_t udl_primary_plane_formats[] = {
 	DRM_FORMAT_RGB565,
 	DRM_FORMAT_XRGB8888,
 };
 
-static enum drm_mode_status
-udl_simple_display_pipe_mode_valid(struct drm_simple_display_pipe *pipe,
-				   const struct drm_display_mode *mode)
-{
-	return MODE_OK;
-}
+static const uint64_t udl_primary_plane_fmtmods[] = {
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
 
-static void
-udl_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe,
-			       struct drm_crtc_state *crtc_state,
-			       struct drm_plane_state *plane_state)
+static void udl_primary_plane_helper_atomic_update(struct drm_plane *plane,
+						   struct drm_atomic_state *state)
 {
-	struct drm_crtc *crtc = &pipe->crtc;
-	struct drm_device *dev = crtc->dev;
-	struct drm_framebuffer *fb = plane_state->fb;
-	struct udl_device *udl = to_udl(dev);
-	struct drm_display_mode *mode = &crtc_state->mode;
+	struct drm_device *dev = plane->dev;
+	struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
 	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
-	struct drm_rect clip = DRM_RECT_INIT(0, 0, fb->width, fb->height);
-	char *buf;
-	char *wrptr;
-	int color_depth = UDL_COLOR_DEPTH_16BPP;
+	struct drm_framebuffer *fb = plane_state->fb;
+	struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
+	struct drm_atomic_helper_damage_iter iter;
+	struct drm_rect damage;
+	int ret, idx;
 
-	buf = (char *)udl->mode_buf;
+	if (!fb)
+		return; /* no framebuffer; plane is disabled */
 
-	/* This first section has to do with setting the base address on the
-	 * controller associated with the display. There are 2 base
-	 * pointers, currently, we only use the 16 bpp segment.
-	 */
-	wrptr = udl_vidreg_lock(buf);
-	wrptr = udl_set_color_depth(wrptr, color_depth);
-	/* set base for 16bpp segment to 0 */
-	wrptr = udl_set_base16bpp(wrptr, 0);
-	/* set base for 8bpp segment to end of fb */
-	wrptr = udl_set_base8bpp(wrptr, 2 * mode->vdisplay * mode->hdisplay);
+	ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
+	if (ret)
+		return;
 
-	wrptr = udl_set_vid_cmds(wrptr, mode);
-	wrptr = udl_set_blank_mode(wrptr, UDL_BLANK_MODE_ON);
-	wrptr = udl_vidreg_unlock(wrptr);
+	if (!drm_dev_enter(dev, &idx))
+		goto out_drm_gem_fb_end_cpu_access;
 
-	wrptr = udl_dummy_render(wrptr);
+	drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
+	drm_atomic_for_each_plane_damage(&iter, &damage) {
+		udl_handle_damage(fb, &shadow_plane_state->data[0], &damage);
+	}
 
-	udl->mode_buf_len = wrptr - buf;
+	drm_dev_exit(idx);
 
-	udl_handle_damage(fb, &shadow_plane_state->data[0], &clip);
-
-	/* enable display */
-	udl_crtc_write_mode_to_hw(crtc);
+out_drm_gem_fb_end_cpu_access:
+	drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
 }
 
-static void
-udl_simple_display_pipe_disable(struct drm_simple_display_pipe *pipe)
+static const struct drm_plane_helper_funcs udl_primary_plane_helper_funcs = {
+	DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
+	.atomic_check = drm_plane_helper_atomic_check,
+	.atomic_update = udl_primary_plane_helper_atomic_update,
+};
+
+static const struct drm_plane_funcs udl_primary_plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = drm_plane_cleanup,
+	DRM_GEM_SHADOW_PLANE_FUNCS,
+};
+
+/*
+ * CRTC
+ */
+
+static int udl_crtc_helper_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state)
 {
-	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+	if (!new_crtc_state->enable)
+		return 0;
+
+	return drm_atomic_helper_check_crtc_primary_plane(new_crtc_state);
+}
+
+static void udl_crtc_helper_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_state *state)
+{
 	struct drm_device *dev = crtc->dev;
+	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+	struct drm_display_mode *mode = &crtc_state->mode;
 	struct urb *urb;
 	char *buf;
+	int idx;
+
+	if (!drm_dev_enter(dev, &idx))
+		return;
 
 	urb = udl_get_urb(dev);
 	if (!urb)
-		return;
+		goto out;
 
 	buf = (char *)urb->transfer_buffer;
 	buf = udl_vidreg_lock(buf);
-	buf = udl_set_blank_mode(buf, UDL_BLANK_MODE_POWERDOWN);
+	buf = udl_set_color_depth(buf, UDL_COLORDEPTH_16BPP);
+	/* set base for 16bpp segment to 0 */
+	buf = udl_set_base16bpp(buf, 0);
+	/* set base for 8bpp segment to end of fb */
+	buf = udl_set_base8bpp(buf, 2 * mode->vdisplay * mode->hdisplay);
+	buf = udl_set_display_mode(buf, mode);
+	buf = udl_set_blank_mode(buf, UDL_BLANKMODE_ON);
 	buf = udl_vidreg_unlock(buf);
 	buf = udl_dummy_render(buf);
 
 	udl_submit_urb(dev, urb, buf - (char *)urb->transfer_buffer);
+
+out:
+	drm_dev_exit(idx);
 }
 
-static void
-udl_simple_display_pipe_update(struct drm_simple_display_pipe *pipe,
-			       struct drm_plane_state *old_plane_state)
+static void udl_crtc_helper_atomic_disable(struct drm_crtc *crtc, struct drm_atomic_state *state)
 {
-	struct drm_plane_state *state = pipe->plane.state;
-	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state);
-	struct drm_framebuffer *fb = state->fb;
-	struct drm_rect rect;
+	struct drm_device *dev = crtc->dev;
+	struct urb *urb;
+	char *buf;
+	int idx;
 
-	if (!fb)
+	if (!drm_dev_enter(dev, &idx))
 		return;
 
-	if (drm_atomic_helper_damage_merged(old_plane_state, state, &rect))
-		udl_handle_damage(fb, &shadow_plane_state->data[0], &rect);
+	urb = udl_get_urb(dev);
+	if (!urb)
+		goto out;
+
+	buf = (char *)urb->transfer_buffer;
+	buf = udl_vidreg_lock(buf);
+	buf = udl_set_blank_mode(buf, UDL_BLANKMODE_POWERDOWN);
+	buf = udl_vidreg_unlock(buf);
+	buf = udl_dummy_render(buf);
+
+	udl_submit_urb(dev, urb, buf - (char *)urb->transfer_buffer);
+
+out:
+	drm_dev_exit(idx);
 }
 
-static const struct drm_simple_display_pipe_funcs udl_simple_display_pipe_funcs = {
-	.mode_valid = udl_simple_display_pipe_mode_valid,
-	.enable = udl_simple_display_pipe_enable,
-	.disable = udl_simple_display_pipe_disable,
-	.update = udl_simple_display_pipe_update,
-	DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS,
+static const struct drm_crtc_helper_funcs udl_crtc_helper_funcs = {
+	.atomic_check = udl_crtc_helper_atomic_check,
+	.atomic_enable = udl_crtc_helper_atomic_enable,
+	.atomic_disable = udl_crtc_helper_atomic_disable,
 };
+
+static const struct drm_crtc_funcs udl_crtc_funcs = {
+	.reset = drm_atomic_helper_crtc_reset,
+	.destroy = drm_crtc_cleanup,
+	.set_config = drm_atomic_helper_set_config,
+	.page_flip = drm_atomic_helper_page_flip,
+	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+};
+
+/*
+ * Encoder
+ */
+
+static const struct drm_encoder_funcs udl_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+/*
+ * Connector
+ */
+
+static int udl_connector_helper_get_modes(struct drm_connector *connector)
+{
+	struct udl_connector *udl_connector = to_udl_connector(connector);
+
+	drm_connector_update_edid_property(connector, udl_connector->edid);
+	if (udl_connector->edid)
+		return drm_add_edid_modes(connector, udl_connector->edid);
+
+	return 0;
+}
+
+static const struct drm_connector_helper_funcs udl_connector_helper_funcs = {
+	.get_modes = udl_connector_helper_get_modes,
+};
+
+static int udl_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
+{
+	struct udl_device *udl = data;
+	struct drm_device *dev = &udl->drm;
+	struct usb_device *udev = udl_to_usb_device(udl);
+	u8 *read_buff;
+	int ret;
+	size_t i;
+
+	read_buff = kmalloc(2, GFP_KERNEL);
+	if (!read_buff)
+		return -ENOMEM;
+
+	for (i = 0; i < len; i++) {
+		int bval = (i + block * EDID_LENGTH) << 8;
+
+		ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+				      0x02, (0x80 | (0x02 << 5)), bval,
+				      0xA1, read_buff, 2, USB_CTRL_GET_TIMEOUT);
+		if (ret < 0) {
+			drm_err(dev, "Read EDID byte %zu failed err %x\n", i, ret);
+			goto err_kfree;
+		} else if (ret < 1) {
+			ret = -EIO;
+			drm_err(dev, "Read EDID byte %zu failed\n", i);
+			goto err_kfree;
+		}
+
+		buf[i] = read_buff[1];
+	}
+
+	kfree(read_buff);
+
+	return 0;
+
+err_kfree:
+	kfree(read_buff);
+	return ret;
+}
+
+static enum drm_connector_status udl_connector_detect(struct drm_connector *connector, bool force)
+{
+	struct drm_device *dev = connector->dev;
+	struct udl_device *udl = to_udl(dev);
+	struct udl_connector *udl_connector = to_udl_connector(connector);
+	enum drm_connector_status status = connector_status_disconnected;
+	int idx;
+
+	/* cleanup previous EDID */
+	kfree(udl_connector->edid);
+	udl_connector->edid = NULL;
+
+	if (!drm_dev_enter(dev, &idx))
+		return connector_status_disconnected;
+
+	udl_connector->edid = drm_do_get_edid(connector, udl_get_edid_block, udl);
+	if (udl_connector->edid)
+		status = connector_status_connected;
+
+	drm_dev_exit(idx);
+
+	return status;
+}
+
+static void udl_connector_destroy(struct drm_connector *connector)
+{
+	struct udl_connector *udl_connector = to_udl_connector(connector);
+
+	drm_connector_cleanup(connector);
+	kfree(udl_connector->edid);
+	kfree(udl_connector);
+}
+
+static const struct drm_connector_funcs udl_connector_funcs = {
+	.reset = drm_atomic_helper_connector_reset,
+	.detect = udl_connector_detect,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = udl_connector_destroy,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+struct drm_connector *udl_connector_init(struct drm_device *dev)
+{
+	struct udl_connector *udl_connector;
+	struct drm_connector *connector;
+	int ret;
+
+	udl_connector = kzalloc(sizeof(*udl_connector), GFP_KERNEL);
+	if (!udl_connector)
+		return ERR_PTR(-ENOMEM);
+
+	connector = &udl_connector->connector;
+	ret = drm_connector_init(dev, connector, &udl_connector_funcs, DRM_MODE_CONNECTOR_VGA);
+	if (ret)
+		goto err_kfree;
+
+	drm_connector_helper_add(connector, &udl_connector_helper_funcs);
+
+	connector->polled = DRM_CONNECTOR_POLL_HPD |
+			    DRM_CONNECTOR_POLL_CONNECT |
+			    DRM_CONNECTOR_POLL_DISCONNECT;
+
+	return connector;
+
+err_kfree:
+	kfree(udl_connector);
+	return ERR_PTR(ret);
+}
 
 /*
  * Modesetting
  */
 
-static const struct drm_mode_config_funcs udl_mode_funcs = {
+static enum drm_mode_status udl_mode_config_mode_valid(struct drm_device *dev,
+						       const struct drm_display_mode *mode)
+{
+	struct udl_device *udl = to_udl(dev);
+
+	if (udl->sku_pixel_limit) {
+		if (mode->vdisplay * mode->hdisplay > udl->sku_pixel_limit)
+			return MODE_MEM;
+	}
+
+	return MODE_OK;
+}
+
+static const struct drm_mode_config_funcs udl_mode_config_funcs = {
 	.fb_create = drm_gem_fb_create_with_dirty,
+	.mode_valid = udl_mode_config_mode_valid,
 	.atomic_check  = drm_atomic_helper_check,
 	.atomic_commit = drm_atomic_helper_commit,
 };
 
 int udl_modeset_init(struct drm_device *dev)
 {
-	size_t format_count = ARRAY_SIZE(udl_simple_display_pipe_formats);
 	struct udl_device *udl = to_udl(dev);
+	struct drm_plane *primary_plane;
+	struct drm_crtc *crtc;
+	struct drm_encoder *encoder;
 	struct drm_connector *connector;
 	int ret;
 
···
 
 	dev->mode_config.min_width = 640;
 	dev->mode_config.min_height = 480;
-
 	dev->mode_config.max_width = 2048;
 	dev->mode_config.max_height = 2048;
-
-	dev->mode_config.prefer_shadow = 0;
 	dev->mode_config.preferred_depth = 16;
+	dev->mode_config.funcs = &udl_mode_config_funcs;
 
-	dev->mode_config.funcs = &udl_mode_funcs;
+	primary_plane = &udl->primary_plane;
+	ret = drm_universal_plane_init(dev, primary_plane, 0,
+				       &udl_primary_plane_funcs,
+				       udl_primary_plane_formats,
+				       ARRAY_SIZE(udl_primary_plane_formats),
+				       udl_primary_plane_fmtmods,
+				       DRM_PLANE_TYPE_PRIMARY, NULL);
+	if (ret)
+		return ret;
+	drm_plane_helper_add(primary_plane, &udl_primary_plane_helper_funcs);
+	drm_plane_enable_fb_damage_clips(primary_plane);
+
+	crtc = &udl->crtc;
+	ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL,
+					&udl_crtc_funcs, NULL);
+	if (ret)
+		return ret;
+	drm_crtc_helper_add(crtc, &udl_crtc_helper_funcs);
+
+	encoder = &udl->encoder;
+	ret = drm_encoder_init(dev, encoder, &udl_encoder_funcs, DRM_MODE_ENCODER_DAC, NULL);
+	if (ret)
+		return ret;
+	encoder->possible_crtcs = drm_crtc_mask(crtc);
 
 	connector = udl_connector_init(dev);
 	if (IS_ERR(connector))
 		return PTR_ERR(connector);
-
-	format_count = ARRAY_SIZE(udl_simple_display_pipe_formats);
-
-	ret = drm_simple_display_pipe_init(dev, &udl->display_pipe,
-					   &udl_simple_display_pipe_funcs,
-					   udl_simple_display_pipe_formats,
-					   format_count, NULL, connector);
+	ret = drm_connector_attach_encoder(connector, encoder);
 	if (ret)
 		return ret;
-	drm_plane_enable_fb_damage_clips(&udl->display_pipe.plane);
 
 	drm_mode_config_reset(dev);
 

drivers/gpu/drm/udl/udl_proto.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef UDL_PROTO_H
+#define UDL_PROTO_H
+
+#include <linux/bits.h>
+
+#define UDL_MSG_BULK		0xaf
+
+/* Register access */
+#define UDL_CMD_WRITEREG	0x20 /* See register constants below */
+
+/* Framebuffer access */
+#define UDL_CMD_WRITERAW8	0x60 /* 8 bit raw write command. */
+#define UDL_CMD_WRITERL8	0x61 /* 8 bit run length command. */
+#define UDL_CMD_WRITECOPY8	0x62 /* 8 bit copy command. */
+#define UDL_CMD_WRITERLX8	0x63 /* 8 bit extended run length command. */
+#define UDL_CMD_WRITERAW16	0x68 /* 16 bit raw write command. */
+#define UDL_CMD_WRITERL16	0x69 /* 16 bit run length command. */
+#define UDL_CMD_WRITECOPY16	0x6a /* 16 bit copy command. */
+#define UDL_CMD_WRITERLX16	0x6b /* 16 bit extended run length command. */
+
+/* Color depth */
+#define UDL_REG_COLORDEPTH		0x00
+#define UDL_COLORDEPTH_16BPP		0
+#define UDL_COLORDEPTH_24BPP		1
+
+/* Display-mode settings */
+#define UDL_REG_XDISPLAYSTART		0x01
+#define UDL_REG_XDISPLAYEND		0x03
+#define UDL_REG_YDISPLAYSTART		0x05
+#define UDL_REG_YDISPLAYEND		0x07
+#define UDL_REG_XENDCOUNT		0x09
+#define UDL_REG_HSYNCSTART		0x0b
+#define UDL_REG_HSYNCEND		0x0d
+#define UDL_REG_HPIXELS			0x0f
+#define UDL_REG_YENDCOUNT		0x11
+#define UDL_REG_VSYNCSTART		0x13
+#define UDL_REG_VSYNCEND		0x15
+#define UDL_REG_VPIXELS			0x17
+#define UDL_REG_PIXELCLOCK5KHZ		0x1b
+
+/* On/Off for driving the DisplayLink framebuffer to the display */
+#define UDL_REG_BLANKMODE		0x1f
+#define UDL_BLANKMODE_ON		0x00 /* hsync and vsync on, visible */
+#define UDL_BLANKMODE_BLANKED		0x01 /* hsync and vsync on, blanked */
+#define UDL_BLANKMODE_VSYNC_OFF		0x03 /* vsync off, blanked */
+#define UDL_BLANKMODE_HSYNC_OFF		0x05 /* hsync off, blanked */
+#define UDL_BLANKMODE_POWERDOWN		0x07 /* powered off; requires modeset */
+
+/* Framebuffer address */
+#define UDL_REG_BASE16BPP_ADDR2		0x20
+#define UDL_REG_BASE16BPP_ADDR1		0x21
+#define UDL_REG_BASE16BPP_ADDR0		0x22
+#define UDL_REG_BASE8BPP_ADDR2		0x26
+#define UDL_REG_BASE8BPP_ADDR1		0x27
+#define UDL_REG_BASE8BPP_ADDR0		0x28
+
+#define UDL_BASE_ADDR0_MASK		GENMASK(7, 0)
+#define UDL_BASE_ADDR1_MASK		GENMASK(15, 8)
+#define UDL_BASE_ADDR2_MASK		GENMASK(23, 16)
+
+/* Lock/unlock video registers */
+#define UDL_REG_VIDREG			0xff
+#define UDL_VIDREG_LOCK			0x00
+#define UDL_VIDREG_UNLOCK		0xff
+
+#endif

drivers/gpu/drm/udl/udl_transfer.c

···
 #include <asm/unaligned.h>
 
 #include "udl_drv.h"
+#include "udl_proto.h"
 
 #define MAX_CMD_PIXELS		255
 
···
 		const u8 *cmd_pixel_start, *cmd_pixel_end = NULL;
 		uint16_t pixel_val16;
 
-		*cmd++ = 0xaf;
-		*cmd++ = 0x6b;
+		*cmd++ = UDL_MSG_BULK;
+		*cmd++ = UDL_CMD_WRITERLX16;
 		*cmd++ = (uint8_t) ((dev_addr >> 16) & 0xFF);
 		*cmd++ = (uint8_t) ((dev_addr >> 8) & 0xFF);
 		*cmd++ = (uint8_t) ((dev_addr) & 0xFF);
···
 	if (cmd_buffer_end <= MIN_RLX_CMD_BYTES + cmd) {
 		/* Fill leftover bytes with no-ops */
 		if (cmd_buffer_end > cmd)
-			memset(cmd, 0xAF, cmd_buffer_end - cmd);
+			memset(cmd, UDL_MSG_BULK, cmd_buffer_end - cmd);
 		cmd = (uint8_t *) cmd_buffer_end;
 	}
 

drivers/gpu/drm/vc4/vc4_hdmi.c

···
 	new_state->base.max_bpc = 8;
 	new_state->base.max_requested_bpc = 8;
 	new_state->output_format = VC4_HDMI_OUTPUT_RGB;
-	drm_atomic_helper_connector_tv_reset(connector);
+	drm_atomic_helper_connector_tv_margins_reset(connector);
 }
 
 static struct drm_connector_state *

drivers/gpu/drm/vc4/vc4_vec.c

···
 #define VEC_CONFIG0_STD_MASK		GENMASK(1, 0)
 #define VEC_CONFIG0_NTSC_STD		0
 #define VEC_CONFIG0_PAL_BDGHI_STD	1
+#define VEC_CONFIG0_PAL_M_STD		2
 #define VEC_CONFIG0_PAL_N_STD		3
 
 #define VEC_SCHPH			0x108
···
 		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
 	},
 	[VC4_VEC_TV_MODE_PAL_M] = {
-		.mode = &pal_mode,
-		.config0 = VEC_CONFIG0_PAL_BDGHI_STD,
-		.config1 = VEC_CONFIG1_C_CVBS_CVBS | VEC_CONFIG1_CUSTOM_FREQ,
-		.custom_freq = 0x223b61d1,
+		.mode = &ntsc_mode,
+		.config0 = VEC_CONFIG0_PAL_M_STD,
+		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
 	},
 };
 

drivers/infiniband/core/umem_dmabuf.c

···
 	if (umem_dmabuf->sgt)
 		goto wait_fence;
 
-	sgt = dma_buf_map_attachment(umem_dmabuf->attach, DMA_BIDIRECTIONAL);
+	sgt = dma_buf_map_attachment_unlocked(umem_dmabuf->attach,
+					      DMA_BIDIRECTIONAL);
 	if (IS_ERR(sgt))
 		return PTR_ERR(sgt);
 
···
 		umem_dmabuf->last_sg_trim = 0;
 	}
 
-	dma_buf_unmap_attachment(umem_dmabuf->attach, umem_dmabuf->sgt,
-				 DMA_BIDIRECTIONAL);
+	dma_buf_unmap_attachment_unlocked(umem_dmabuf->attach, umem_dmabuf->sgt,
+					  DMA_BIDIRECTIONAL);
 
 	umem_dmabuf->sgt = NULL;
 }

drivers/media/common/videobuf2/videobuf2-dma-contig.c

···
 	if (buf->db_attach) {
 		struct iosys_map map;
 
-		if (!dma_buf_vmap(buf->db_attach->dmabuf, &map))
+		if (!dma_buf_vmap_unlocked(buf->db_attach->dmabuf, &map))
 			buf->vaddr = map.vaddr;
 
 		return buf->vaddr;
···
 	struct dma_buf_attachment *db_attach, enum dma_data_direction dma_dir)
 {
 	struct vb2_dc_attachment *attach = db_attach->priv;
-	/* stealing dmabuf mutex to serialize map/unmap operations */
-	struct mutex *lock = &db_attach->dmabuf->lock;
 	struct sg_table *sgt;
-
-	mutex_lock(lock);
 
 	sgt = &attach->sgt;
 	/* return previously mapped sg table */
-	if (attach->dma_dir == dma_dir) {
-		mutex_unlock(lock);
+	if (attach->dma_dir == dma_dir)
 		return sgt;
-	}
 
 	/* release any previous cache */
 	if (attach->dma_dir != DMA_NONE) {
···
 	if (dma_map_sgtable(db_attach->dev, sgt, dma_dir,
 			    DMA_ATTR_SKIP_CPU_SYNC)) {
 		pr_err("failed to map scatterlist\n");
-		mutex_unlock(lock);
 		return ERR_PTR(-EIO);
 	}
 
 	attach->dma_dir = dma_dir;
-
-	mutex_unlock(lock);
 
 	return sgt;
 }
···
 	}
 
 	/* get the associated scatterlist for this buffer */
-	sgt = dma_buf_map_attachment(buf->db_attach, buf->dma_dir);
+	sgt = dma_buf_map_attachment_unlocked(buf->db_attach, buf->dma_dir);
 	if (IS_ERR(sgt)) {
 		pr_err("Error getting dmabuf scatterlist\n");
 		return -EINVAL;
···
 	if (contig_size < buf->size) {
 		pr_err("contiguous chunk is too small %lu/%lu\n",
 		       contig_size, buf->size);
-		dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir);
+		dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt,
+						  buf->dma_dir);
 		return -EFAULT;
 	}
 
···
 	}
 
 	if (buf->vaddr) {
-		dma_buf_vunmap(buf->db_attach->dmabuf, &map);
+		dma_buf_vunmap_unlocked(buf->db_attach->dmabuf, &map);
 		buf->vaddr = NULL;
 	}
-	dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir);
+	dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt, buf->dma_dir);
 
 	buf->dma_addr = 0;
 	buf->dma_sgt = NULL;

drivers/media/common/videobuf2/videobuf2-dma-sg.c

···
 
 	if (!buf->vaddr) {
 		if (buf->db_attach) {
-			ret = dma_buf_vmap(buf->db_attach->dmabuf, &map);
+			ret = dma_buf_vmap_unlocked(buf->db_attach->dmabuf, &map);
 			buf->vaddr = ret ? NULL : map.vaddr;
 		} else {
 			buf->vaddr = vm_map_ram(buf->pages, buf->num_pages, -1);
···
 	struct dma_buf_attachment *db_attach, enum dma_data_direction dma_dir)
 {
 	struct vb2_dma_sg_attachment *attach = db_attach->priv;
-	/* stealing dmabuf mutex to serialize map/unmap operations */
-	struct mutex *lock = &db_attach->dmabuf->lock;
 	struct sg_table *sgt;
-
-	mutex_lock(lock);
 
 	sgt = &attach->sgt;
 	/* return previously mapped sg table */
-	if (attach->dma_dir == dma_dir) {
-		mutex_unlock(lock);
+	if (attach->dma_dir == dma_dir)
 		return sgt;
-	}
 
 	/* release any previous cache */
 	if (attach->dma_dir != DMA_NONE) {
···
 	/* mapping to the client with new direction */
 	if (dma_map_sgtable(db_attach->dev, sgt, dma_dir, 0)) {
 		pr_err("failed to map scatterlist\n");
-		mutex_unlock(lock);
 		return ERR_PTR(-EIO);
 	}
 
 	attach->dma_dir = dma_dir;
-
-	mutex_unlock(lock);
 
 	return sgt;
 }
···
 	}
 
 	/* get the associated scatterlist for this buffer */
-	sgt = dma_buf_map_attachment(buf->db_attach, buf->dma_dir);
+	sgt = dma_buf_map_attachment_unlocked(buf->db_attach, buf->dma_dir);
 	if (IS_ERR(sgt)) {
 		pr_err("Error getting dmabuf scatterlist\n");
 		return -EINVAL;
···
 	}
 
 	if (buf->vaddr) {
-		dma_buf_vunmap(buf->db_attach->dmabuf, &map);
+		dma_buf_vunmap_unlocked(buf->db_attach->dmabuf, &map);
 		buf->vaddr = NULL;
 	}
-	dma_buf_unmap_attachment(buf->db_attach, sgt, buf->dma_dir);
+	dma_buf_unmap_attachment_unlocked(buf->db_attach, sgt, buf->dma_dir);
 
 	buf->dma_sgt = NULL;
 }

drivers/media/common/videobuf2/videobuf2-vmalloc.c

···
 	struct dma_buf_attachment *db_attach, enum dma_data_direction dma_dir)
 {
 	struct vb2_vmalloc_attachment *attach = db_attach->priv;
-	/* stealing dmabuf mutex to serialize map/unmap operations */
-	struct mutex *lock = &db_attach->dmabuf->lock;
 	struct sg_table *sgt;
-
-	mutex_lock(lock);
 
 	sgt = &attach->sgt;
 	/* return previously mapped sg table */
-	if (attach->dma_dir == dma_dir) {
-		mutex_unlock(lock);
+	if (attach->dma_dir == dma_dir)
 		return sgt;
-	}
 
 	/* release any previous cache */
 	if (attach->dma_dir != DMA_NONE) {
···
 	/* mapping to the client with new direction */
 	if (dma_map_sgtable(db_attach->dev, sgt, dma_dir, 0)) {
 		pr_err("failed to map scatterlist\n");
-		mutex_unlock(lock);
 		return ERR_PTR(-EIO);
 	}
 
 	attach->dma_dir = dma_dir;
-
-	mutex_unlock(lock);
 
 	return sgt;
 }
···
 	struct iosys_map map;
 	int ret;
 
-	ret = dma_buf_vmap(buf->dbuf, &map);
+	ret = dma_buf_vmap_unlocked(buf->dbuf, &map);
 	if (ret)
 		return -EFAULT;
 	buf->vaddr = map.vaddr;
···
 	struct vb2_vmalloc_buf *buf = mem_priv;
 	struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);
 
-	dma_buf_vunmap(buf->dbuf, &map);
+	dma_buf_vunmap_unlocked(buf->dbuf, &map);
 	buf->vaddr = NULL;
 }
 
···
 	struct iosys_map map = IOSYS_MAP_INIT_VADDR(buf->vaddr);
 
 	if (buf->vaddr)
-		dma_buf_vunmap(buf->dbuf, &map);
+		dma_buf_vunmap_unlocked(buf->dbuf, &map);
 
 	kfree(buf);
 }

drivers/media/platform/nvidia/tegra-vde/dmabuf-cache.c

···
 	if (entry->vde->domain)
 		tegra_vde_iommu_unmap(entry->vde, entry->iova);
 
-	dma_buf_unmap_attachment(entry->a, entry->sgt, entry->dma_dir);
+	dma_buf_unmap_attachment_unlocked(entry->a, entry->sgt, entry->dma_dir);
 	dma_buf_detach(dmabuf, entry->a);
 	dma_buf_put(dmabuf);
 
···
 		goto err_unlock;
 	}
 
-	sgt = dma_buf_map_attachment(attachment, dma_dir);
+	sgt = dma_buf_map_attachment_unlocked(attachment, dma_dir);
 	if (IS_ERR(sgt)) {
 		dev_err(dev, "Failed to get dmabufs sg_table\n");
 		err = PTR_ERR(sgt);
···
 err_free:
 	kfree(entry);
 err_unmap:
-	dma_buf_unmap_attachment(attachment, sgt, dma_dir);
+	dma_buf_unmap_attachment_unlocked(attachment, sgt, dma_dir);
 err_detach:
 	dma_buf_detach(dmabuf, attachment);
 err_unlock:

drivers/misc/fastrpc.c

···
 				return;
 			}
 		}
-		dma_buf_unmap_attachment(map->attach, map->table,
-					 DMA_BIDIRECTIONAL);
+		dma_buf_unmap_attachment_unlocked(map->attach, map->table,
+						  DMA_BIDIRECTIONAL);
 		dma_buf_detach(map->buf, map->attach);
 		dma_buf_put(map->buf);
 	}
···
 		goto attach_err;
 	}
 
-	map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL);
+	map->table = dma_buf_map_attachment_unlocked(map->attach, DMA_BIDIRECTIONAL);
 	if (IS_ERR(map->table)) {
 		err = PTR_ERR(map->table);
 		goto map_err;

drivers/video/fbdev/Kconfig

···
 config FB_OF
 	bool "Open Firmware frame buffer device support"
 	depends on (FB = y) && PPC && (!PPC_PSERIES || PCI)
+	depends on !DRM_OFDRM
 	select APERTURE_HELPERS
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA

drivers/xen/gntdev-dmabuf.c

···
 
 	gntdev_dmabuf->u.imp.attach = attach;
 
-	sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
+	sgt = dma_buf_map_attachment_unlocked(attach, DMA_BIDIRECTIONAL);
 	if (IS_ERR(sgt)) {
 		ret = ERR_CAST(sgt);
 		goto fail_detach;
···
 fail_end_access:
 	dmabuf_imp_end_foreign_access(gntdev_dmabuf->u.imp.refs, count);
 fail_unmap:
-	dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL);
+	dma_buf_unmap_attachment_unlocked(attach, sgt, DMA_BIDIRECTIONAL);
 fail_detach:
 	dma_buf_detach(dma_buf, attach);
 fail_free_obj:
···
 	attach = gntdev_dmabuf->u.imp.attach;
 
 	if (gntdev_dmabuf->u.imp.sgt)
-		dma_buf_unmap_attachment(attach, gntdev_dmabuf->u.imp.sgt,
-					 DMA_BIDIRECTIONAL);
+		dma_buf_unmap_attachment_unlocked(attach, gntdev_dmabuf->u.imp.sgt,
+						  DMA_BIDIRECTIONAL);
 	dma_buf = attach->dmabuf;
 	dma_buf_detach(attach->dmabuf, attach);
 	dma_buf_put(dma_buf);

include/drm/drm_atomic_helper.h

···
 					int max_scale,
 					bool can_position,
 					bool can_update_disabled);
-int drm_atomic_helper_check_crtc_state(struct drm_crtc_state *crtc_state,
-				       bool can_disable_primary_plane);
 int drm_atomic_helper_check_planes(struct drm_device *dev,
 			       struct drm_atomic_state *state);
+int drm_atomic_helper_check_crtc_primary_plane(struct drm_crtc_state *crtc_state);
 int drm_atomic_helper_check(struct drm_device *dev,
 			    struct drm_atomic_state *state);
 void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);

include/drm/drm_atomic_state_helper.h

···
 void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
 					 struct drm_connector_state *conn_state);
 void drm_atomic_helper_connector_reset(struct drm_connector *connector);
-void drm_atomic_helper_connector_tv_reset(struct drm_connector *connector);
+void drm_atomic_helper_connector_tv_margins_reset(struct drm_connector *connector);
 void
 __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
 					   struct drm_connector_state *state);

include/drm/drm_connector.h

···
 
 /**
  * struct drm_tv_connector_state - TV connector related states
- * @subconnector: selected subconnector
+ * @select_subconnector: selected subconnector
+ * @subconnector: detected subconnector
  * @margins: TV margins
  * @mode: TV mode
  * @brightness: brightness in percent
···
  * @hue: hue in percent
  */
 struct drm_tv_connector_state {
+	enum drm_mode_subconnector select_subconnector;
 	enum drm_mode_subconnector subconnector;
 	struct drm_connector_tv_margins margins;
 	unsigned int mode;

include/drm/drm_crtc_helper.h

···
 			      struct drm_display_mode *mode,
 			      int x, int y,
 			      struct drm_framebuffer *old_fb);
+int drm_crtc_helper_atomic_check(struct drm_crtc *crtc,
+				 struct drm_atomic_state *state);
 bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
 bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
 

include/drm/drm_edid.h

···
 #define DRM_EDID_RANGE_OFFSET_MIN_HFREQ (1 << 2) /* 1.4 */
 #define DRM_EDID_RANGE_OFFSET_MAX_HFREQ (1 << 3) /* 1.4 */
 
-#define DRM_EDID_DEFAULT_GTF_SUPPORT_FLAG   0x00
-#define DRM_EDID_RANGE_LIMITS_ONLY_FLAG     0x01
-#define DRM_EDID_SECONDARY_GTF_SUPPORT_FLAG 0x02
-#define DRM_EDID_CVT_SUPPORT_FLAG           0x04
+#define DRM_EDID_DEFAULT_GTF_SUPPORT_FLAG   0x00 /* 1.3 */
+#define DRM_EDID_RANGE_LIMITS_ONLY_FLAG     0x01 /* 1.4 */
+#define DRM_EDID_SECONDARY_GTF_SUPPORT_FLAG 0x02 /* 1.3 */
+#define DRM_EDID_CVT_SUPPORT_FLAG           0x04 /* 1.4 */
+
+#define DRM_EDID_CVT_FLAGS_STANDARD_BLANKING (1 << 3)
+#define DRM_EDID_CVT_FLAGS_REDUCED_BLANKING  (1 << 4)
 
 struct detailed_data_monitor_range {
 	u8 min_vfreq;
···
 #define DRM_EDID_DIGITAL_TYPE_DP       (5 << 0) /* 1.4 */
 #define DRM_EDID_DIGITAL_DFP_1_X       (1 << 0) /* 1.3 */
 
-#define DRM_EDID_FEATURE_DEFAULT_GTF      (1 << 0)
+#define DRM_EDID_FEATURE_DEFAULT_GTF      (1 << 0) /* 1.2 */
+#define DRM_EDID_FEATURE_CONTINUOUS_FREQ  (1 << 0) /* 1.4 */
 #define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)
 #define DRM_EDID_FEATURE_STANDARD_COLOR   (1 << 2)
 /* If analog */

include/drm/drm_gem.h

···
 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
 		bool dirty, bool accessed);
 
+int drm_gem_vmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map);
+void drm_gem_vunmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map);
+
 int drm_gem_objects_lookup(struct drm_file *filp, void __user *bo_handles,
 			   int count, struct drm_gem_object ***objs_out);
 struct drm_gem_object *drm_gem_object_lookup(struct drm_file *filp, u32 handle);

include/drm/drm_mode_config.h

···
  * @max_width: maximum fb pixel width on this device
  * @max_height: maximum fb pixel height on this device
  * @funcs: core driver provided mode setting functions
- * @fb_base: base address of the framebuffer
  * @poll_enabled: track polling support for this device
  * @poll_running: track polling status for this device
  * @delayed_event: track delayed poll uevent deliver for this device
···
 	int min_width, min_height;
 	int max_width, max_height;
 	const struct drm_mode_config_funcs *funcs;
-	resource_size_t fb_base;
 
 	/* output poll support */
 	bool poll_enabled;

include/drm/gpu_scheduler.h

···
 	DRM_SCHED_PRIORITY_UNSET = -2
 };
 
+/* Used to chose between FIFO and RR jobs scheduling */
+extern int drm_sched_policy;
+
+#define DRM_SCHED_POLICY_RR    0
+#define DRM_SCHED_POLICY_FIFO  1
+
 /**
  * struct drm_sched_entity - A wrapper around a job queue (typically
  * attached to the DRM file_priv).
···
 	 * drm_sched_entity_fini().
 	 */
 	struct completion		entity_idle;
+
+	/**
+	 * @oldest_job_waiting:
+	 *
+	 * Marks earliest job waiting in SW queue
+	 */
+	ktime_t				oldest_job_waiting;
+
+	/**
+	 * @rb_tree_node:
+	 *
+	 * The node used to insert this entity into time based priority queue
+	 */
+	struct rb_node			rb_tree_node;
+
 };
 
 /**
···
  * @sched: the scheduler to which this rq belongs to.
  * @entities: list of the entities to be scheduled.
  * @current_entity: the entity which is to be scheduled.
+ * @rb_tree_root: root of time based priory queue of entities for FIFO scheduling
  *
  * Run queue is a set of entities scheduling command submissions for
  * one specific ring. It implements the scheduling policy that selects
···
 	struct drm_gpu_scheduler	*sched;
 	struct list_head		entities;
 	struct drm_sched_entity		*current_entity;
+	struct rb_root_cached		rb_tree_root;
 };
 
 /**
···
 
 	/** @last_dependency: tracks @dependencies as they signal */
 	unsigned long			last_dependency;
+
+	/**
+	 * @submit_ts:
+	 *
+	 * When the job was pushed into the entity queue.
+	 */
+	ktime_t                         submit_ts;
 };
 
 static inline bool drm_sched_invalidate_job(struct drm_sched_job *s_job,
···
 			     struct drm_sched_entity *entity);
 void drm_sched_rq_remove_entity(struct drm_sched_rq *rq,
 				struct drm_sched_entity *entity);
+
+void drm_sched_rq_update_fifo(struct drm_sched_entity *entity, ktime_t ts);
 
 int drm_sched_entity_init(struct drm_sched_entity *entity,
 			  enum drm_sched_priority priority,

include/linux/dma-buf.h

···
 	const struct dma_buf_ops *ops;
 
 	/**
-	 * @lock:
-	 *
-	 * Used internally to serialize list manipulation, attach/detach and
-	 * vmap/unmap. Note that in many cases this is superseeded by
-	 * dma_resv_lock() on @resv.
-	 */
-	struct mutex lock;
-
-	/**
 	 * @vmapping_counter:
 	 *
 	 * Used internally to refcnt the vmaps returned by dma_buf_vmap().
···
 			     enum dma_data_direction dir);
 int dma_buf_end_cpu_access(struct dma_buf *dma_buf,
 			   enum dma_data_direction dir);
+struct sg_table *
+dma_buf_map_attachment_unlocked(struct dma_buf_attachment *attach,
+				enum dma_data_direction direction);
+void dma_buf_unmap_attachment_unlocked(struct dma_buf_attachment *attach,
+				       struct sg_table *sg_table,
+				       enum dma_data_direction direction);
 
 int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *,
 		 unsigned long);
 int dma_buf_vmap(struct dma_buf *dmabuf, struct iosys_map *map);
 void dma_buf_vunmap(struct dma_buf *dmabuf, struct iosys_map *map);
+int dma_buf_vmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map);
+void dma_buf_vunmap_unlocked(struct dma_buf *dmabuf, struct iosys_map *map);
 #endif /* __DMA_BUF_H__ */

include/uapi/drm/drm_fourcc.h

···
  */
 #define DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED fourcc_mod_code(VIVANTE, 4)
 
+/*
+ * Vivante TS (tile-status) buffer modifiers. They can be combined with all of
+ * the color buffer tiling modifiers defined above. When TS is present it's a
+ * separate buffer containing the clear/compression status of each tile. The
+ * modifiers are defined as VIVANTE_MOD_TS_c_s, where c is the color buffer
+ * tile size in bytes covered by one entry in the status buffer and s is the
+ * number of status bits per entry.
+ * We reserve the top 8 bits of the Vivante modifier space for tile status
+ * clear/compression modifiers, as future cores might add some more TS layout
+ * variations.
+ */
+#define VIVANTE_MOD_TS_64_4               (1ULL << 48)
+#define VIVANTE_MOD_TS_64_2               (2ULL << 48)
+#define VIVANTE_MOD_TS_128_4              (3ULL << 48)
+#define VIVANTE_MOD_TS_256_4              (4ULL << 48)
+#define VIVANTE_MOD_TS_MASK               (0xfULL << 48)
+
+/*
+ * Vivante compression modifiers. Those depend on a TS modifier being present
+ * as the TS bits get reinterpreted as compression tags instead of simple
+ * clear markers when compression is enabled.
+ */
+#define VIVANTE_MOD_COMP_DEC400           (1ULL << 52)
+#define VIVANTE_MOD_COMP_MASK             (0xfULL << 52)
+
+/* Masking out the extension bits will yield the base modifier. */
+#define VIVANTE_MOD_EXT_MASK              (VIVANTE_MOD_TS_MASK | \
+                                           VIVANTE_MOD_COMP_MASK)
+
 /* NVIDIA frame buffer modifiers */
 
 /*

include/uapi/drm/drm_mode.h

···
 	};
 };
 
+/**
+ * DRM_MODE_PAGE_FLIP_EVENT
+ *
+ * Request that the kernel sends back a vblank event (see
+ * struct drm_event_vblank) with the &DRM_EVENT_FLIP_COMPLETE type when the
+ * page-flip is done.
+ */
 #define DRM_MODE_PAGE_FLIP_EVENT 0x01
+/**
+ * DRM_MODE_PAGE_FLIP_ASYNC
+ *
+ * Request that the page-flip is performed as soon as possible, ie. with no
+ * delay due to waiting for vblank. This may cause tearing to be visible on
+ * the screen.
+ */
 #define DRM_MODE_PAGE_FLIP_ASYNC 0x02
 #define DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE 0x4
 #define DRM_MODE_PAGE_FLIP_TARGET_RELATIVE 0x8
 #define DRM_MODE_PAGE_FLIP_TARGET (DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE | \
 				   DRM_MODE_PAGE_FLIP_TARGET_RELATIVE)
+/**
+ * DRM_MODE_PAGE_FLIP_FLAGS
+ *
+ * Bitmask of flags suitable for &drm_mode_crtc_page_flip_target.flags.
+ */
 #define DRM_MODE_PAGE_FLIP_FLAGS (DRM_MODE_PAGE_FLIP_EVENT | \
 				  DRM_MODE_PAGE_FLIP_ASYNC | \
 				  DRM_MODE_PAGE_FLIP_TARGET)
···
 	__u32 handle;
 };
 
-/* page-flip flags are valid, plus: */
+/**
+ * DRM_MODE_ATOMIC_TEST_ONLY
+ *
+ * Do not apply the atomic commit, instead check whether the hardware supports
+ * this configuration.
+ *
+ * See &drm_mode_config_funcs.atomic_check for more details on test-only
+ * commits.
+ */
 #define DRM_MODE_ATOMIC_TEST_ONLY 0x0100
+/**
+ * DRM_MODE_ATOMIC_NONBLOCK
+ *
+ * Do not block while applying the atomic commit. The &DRM_IOCTL_MODE_ATOMIC
+ * IOCTL returns immediately instead of waiting for the changes to be applied
+ * in hardware. Note, the driver will still check that the update can be
+ * applied before retuning.
+ */
 #define DRM_MODE_ATOMIC_NONBLOCK  0x0200
+/**
+ * DRM_MODE_ATOMIC_ALLOW_MODESET
+ *
+ * Allow the update to result in temporary or transient visible artifacts while
+ * the update is being applied. Applying the update may also take significantly
+ * more time than a page flip. All visual artifacts will disappear by the time
+ * the update is completed, as signalled through the vblank event's timestamp
+ * (see struct drm_event_vblank).
+ *
+ * This flag must be set when the KMS update might cause visible artifacts.
+ * Without this flag such KMS update will return a EINVAL error. What kind of
+ * update may cause visible artifacts depends on the driver and the hardware.
+ * User-space that needs to know beforehand if an update might cause visible
+ * artifacts can use &DRM_MODE_ATOMIC_TEST_ONLY without
+ * &DRM_MODE_ATOMIC_ALLOW_MODESET to see if it fails.
+ *
+ * To the best of the driver's knowledge, visual artifacts are guaranteed to
+ * not appear when this flag is not set. Some sinks might display visual
+ * artifacts outside of the driver's control.
+ */
 #define DRM_MODE_ATOMIC_ALLOW_MODESET 0x0400
 
+/**
+ * DRM_MODE_ATOMIC_FLAGS
+ *
+ * Bitfield of flags accepted by the &DRM_IOCTL_MODE_ATOMIC IOCTL in
+ * &drm_mode_atomic.flags.
+ */
 #define DRM_MODE_ATOMIC_FLAGS (\
 		DRM_MODE_PAGE_FLIP_EVENT |\
 		DRM_MODE_PAGE_FLIP_ASYNC |\