Merge tag 'topic/drm-misc-2016-09-08' of git://anongit.freedesktop.org/drm-intel into drm-next

* tag 'topic/drm-misc-2016-09-08' of git://anongit.freedesktop.org/drm-intel:
drm: Fix error path in drm_mode_page_flip_ioctl()
Revert "drm: Unify handling of blob and object properties"
drm/udl: implement usb_driver suspend/resume.
drm: fix signed integer overflow
drm/atomic: Reject properties not part of the object.
drm/doc: Add a few words on validation with IGT

Documentation/gpu/drm-uapi.rst

···
 visible to user-space and accessible beyond open-file boundaries, they
 cannot support render nodes.
 
+Validating changes with IGT
+===========================
+
+There's a collection of tests that aims to cover the whole functionality of
+DRM drivers and that can be used to check that changes to DRM drivers or the
+core don't regress existing functionality. This test suite is called IGT and
+its code can be found in https://cgit.freedesktop.org/drm/igt-gpu-tools/.
+
+To build IGT, start by installing its build dependencies. In Debian-based
+systems::
+
+	# apt-get build-dep intel-gpu-tools
+
+And in Fedora-based systems::
+
+	# dnf builddep intel-gpu-tools
+
+Then clone the repository::
+
+	$ git clone git://anongit.freedesktop.org/drm/igt-gpu-tools
+
+Configure the build system and start the build::
+
+	$ cd igt-gpu-tools && ./autogen.sh && make -j6
+
+Download the piglit dependency::
+
+	$ ./scripts/run-tests.sh -d
+
+And run the tests::
+
+	$ ./scripts/run-tests.sh -t kms -t core -s
+
+run-tests.sh is a wrapper around piglit that will execute the tests matching
+the -t options. A report in HTML format will be available in
+./results/html/index.html. Results can be compared with piglit.
+
 VBlank event handling
 =====================
 

drivers/gpu/drm/drm_atomic.c

···
 	struct drm_crtc_state *crtc_state;
 	unsigned plane_mask;
 	int ret = 0;
-	unsigned int i, j;
+	unsigned int i, j, k;
 
 	/* disallow for drivers not supporting atomic: */
 	if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
···
 			if (get_user(prop_id, props_ptr + copied_props)) {
 				drm_mode_object_unreference(obj);
 				ret = -EFAULT;
+				goto out;
+			}
+
+			for (k = 0; k < obj->properties->count; k++)
+				if (obj->properties->properties[k]->base.id == prop_id)
+					break;
+
+			if (k == obj->properties->count) {
+				ret = -EINVAL;
 				goto out;
 			}
 

drivers/gpu/drm/drm_crtc.c

···
 	}
 
 out:
-	if (ret)
+	if (ret && crtc->funcs->page_flip_target)
 		drm_crtc_vblank_put(crtc);
 	if (fb)
 		drm_framebuffer_unreference(fb);

drivers/gpu/drm/drm_hashtab.c

···
 			      unsigned long add)
 {
 	int ret;
-	unsigned long mask = (1 << bits) - 1;
+	unsigned long mask = (1UL << bits) - 1;
 	unsigned long first, unshifted_key;
 
 	unshifted_key = hash_long(seed, bits);

drivers/gpu/drm/drm_property.c

···
 		for (i = 0; i < property->num_values; i++)
 			valid_mask |= (1ULL << property->values[i]);
 		return !(value & ~valid_mask);
-	} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB) ||
-		   drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
+	} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
+		struct drm_property_blob *blob;
+
+		if (value == 0)
+			return true;
+
+		blob = drm_property_lookup_blob(property->dev, value);
+		if (blob) {
+			*ref = &blob->base;
+			return true;
+		} else {
+			return false;
+		}
+	} else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
 		/* a zero value for an object property translates to null: */
 		if (value == 0)
 			return true;
···
 }
 
 void drm_property_change_valid_put(struct drm_property *property,
-				   struct drm_mode_object *ref)
+		struct drm_mode_object *ref)
 {
 	if (!ref)
 		return;
 
-	if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT) ||
-	    drm_property_type_is(property, DRM_MODE_PROP_BLOB))
+	if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
 		drm_mode_object_unreference(ref);
+	} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
+		drm_property_unreference_blob(obj_to_blob(ref));
 }

drivers/gpu/drm/udl/udl_drv.c

···
 	return 0;
 }
 
+static int udl_usb_suspend(struct usb_interface *interface,
+			   pm_message_t message)
+{
+	return 0;
+}
+
+static int udl_usb_resume(struct usb_interface *interface)
+{
+	struct drm_device *dev = usb_get_intfdata(interface);
+
+	udl_modeset_restore(dev);
+	return 0;
+}
+
 static const struct vm_operations_struct udl_gem_vm_ops = {
 	.fault = udl_gem_fault,
 	.open = drm_gem_vm_open,
···
 	.name = "udl",
 	.probe = udl_usb_probe,
 	.disconnect = udl_usb_disconnect,
+	.suspend = udl_usb_suspend,
+	.resume = udl_usb_resume,
 	.id_table = id_table,
 };
 module_usb_driver(udl_driver);

drivers/gpu/drm/udl/udl_drv.h

···
 	struct device *dev;
 	struct drm_device *ddev;
 	struct usb_device *udev;
+	struct drm_crtc *crtc;
 
 	int sku_pixel_limit;
 
···
 
 /* modeset */
 int udl_modeset_init(struct drm_device *dev);
+void udl_modeset_restore(struct drm_device *dev);
 void udl_modeset_cleanup(struct drm_device *dev);
 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
 

drivers/gpu/drm/udl/udl_modeset.c

···
 	char *wrptr;
 	int color_depth = 0;
 
+	udl->crtc = crtc;
+
 	buf = (char *)udl->mode_buf;
 
 	/* for now we just clip 24 -> 16 - if we fix that fix this */
···
 	udl_connector_init(dev, encoder);
 
 	return 0;
+}
+
+void udl_modeset_restore(struct drm_device *dev)
+{
+	struct udl_device *udl = dev->dev_private;
+	struct udl_framebuffer *ufb;
+
+	if (!udl->crtc || !udl->crtc->primary->fb)
+		return;
+	udl_crtc_commit(udl->crtc);
+	ufb = to_udl_fb(udl->crtc->primary->fb);
+	udl_handle_damage(ufb, 0, 0, ufb->base.width, ufb->base.height);
 }
 
 void udl_modeset_cleanup(struct drm_device *dev)