drm/amdgpu: Fix amdgpu_display_supported_domains logic.

Add restriction to dissallow GTT domain if the relevant BO
doesn't have USWC flag set to avoid the APU hang scenario.

Signed-off-by: Andrey Grodzovsky <[e-mail]>
Reviewed-by: Christian König <[e-mail]>
Reviewed-by: Alex Deucher <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 	}
 
 	if (!adev->enable_virtual_display) {
-		r = amdgpu_bo_pin(new_abo, amdgpu_display_supported_domains(adev));
+		r = amdgpu_bo_pin(new_abo,
+				  amdgpu_display_supported_domains(adev, new_abo->flags));
 		if (unlikely(r != 0)) {
 			DRM_ERROR("failed to pin new abo buffer before flip\n");
 			goto unreserve;
···
 	.create_handle = drm_gem_fb_create_handle,
 };
 
-uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev)
+uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev,
+					  uint64_t bo_flags)
 {
 	uint32_t domain = AMDGPU_GEM_DOMAIN_VRAM;
 
 #if defined(CONFIG_DRM_AMD_DC)
 	/*
-	 * if amdgpu_bo_validate_uswc returns false it means that USWC mappings
+	 * if amdgpu_bo_support_uswc returns false it means that USWC mappings
 	 * is not supported for this board. But this mapping is required
 	 * to avoid hang caused by placement of scanout BO in GTT on certain
 	 * APUs. So force the BO placement to VRAM in case this architecture
 	 * will not allow USWC mappings.
+	 * Also, don't allow GTT domain if the BO doens't have USWC falg set.
 	 */
-	if (adev->asic_type >= CHIP_CARRIZO && adev->asic_type <= CHIP_RAVEN &&
-	    adev->flags & AMD_IS_APU && amdgpu_bo_support_uswc(0) &&
+	if (adev->asic_type >= CHIP_CARRIZO &&
+	    adev->asic_type <= CHIP_RAVEN &&
+	    (adev->flags & AMD_IS_APU) &&
+	    (bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) &&
+	    amdgpu_bo_support_uswc(bo_flags) &&
 	    amdgpu_device_asic_has_dc_support(adev->asic_type))
 		domain |= AMDGPU_GEM_DOMAIN_GTT;
 #endif

drivers/gpu/drm/amd/amdgpu/amdgpu_display.h

···
 int amdgpu_display_freesync_ioctl(struct drm_device *dev, void *data,
 				  struct drm_file *filp);
 void amdgpu_display_update_priority(struct amdgpu_device *adev);
-uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev);
+uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev,
+					  uint64_t bo_flags);
 struct drm_framebuffer *
 amdgpu_display_user_framebuffer_create(struct drm_device *dev,
 				       struct drm_file *file_priv,

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

···
 	struct amdgpu_bo *bo = gem_to_amdgpu_bo(dma_buf->priv);
 	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 	struct ttm_operation_ctx ctx = { true, false };
-	u32 domain = amdgpu_display_supported_domains(adev);
+	u32 domain = amdgpu_display_supported_domains(adev, bo->flags);
 	int ret;
 	bool reads = (direction == DMA_BIDIRECTIONAL ||
 		      direction == DMA_FROM_DEVICE);

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

···
 	int aligned_size, size;
 	int height = mode_cmd->height;
 	u32 cpp;
+	u64 flags = AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
+			       AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS     |
+			       AMDGPU_GEM_CREATE_VRAM_CLEARED 	     |
+			       AMDGPU_GEM_CREATE_CPU_GTT_USWC;
 
 	info = drm_get_format_info(adev->ddev, mode_cmd);
 	cpp = info->cpp[0];
···
 	/* need to align pitch with crtc limits */
 	mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, cpp,
 						  fb_tiled);
-	domain = amdgpu_display_supported_domains(adev);
+	domain = amdgpu_display_supported_domains(adev, flags);
 	height = ALIGN(mode_cmd->height, 8);
 	size = mode_cmd->pitches[0] * height;
 	aligned_size = ALIGN(size, PAGE_SIZE);
-	ret = amdgpu_gem_object_create(adev, aligned_size, 0, domain,
-				       AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
-				       AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS     |
-				       AMDGPU_GEM_CREATE_VRAM_CLEARED 	     |
-				       AMDGPU_GEM_CREATE_CPU_GTT_USWC,
+	ret = amdgpu_gem_object_create(adev, aligned_size, 0, domain, flags,
 				       ttm_bo_type_kernel, NULL, &gobj);
 	if (ret) {
 		pr_err("failed to allocate framebuffer (%d)\n", aligned_size);

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

···
 	args->size = (u64)args->pitch * args->height;
 	args->size = ALIGN(args->size, PAGE_SIZE);
 	domain = amdgpu_bo_get_preferred_pin_domain(adev,
-				amdgpu_display_supported_domains(adev));
+				amdgpu_display_supported_domains(adev, flags));
 	r = amdgpu_gem_object_create(adev, args->size, 0, domain, flags,
 				     ttm_bo_type_device, NULL, &gobj);
 	if (r)

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

···
 	}
 
 	if (plane->type != DRM_PLANE_TYPE_CURSOR)
-		domain = amdgpu_display_supported_domains(adev);
+		domain = amdgpu_display_supported_domains(adev, rbo->flags);
 	else
 		domain = AMDGPU_GEM_DOMAIN_VRAM;