drm/amdgpu: Add check for USWC support for amdgpu_display_supported_domains (ddcb7fc6) · Commits · 戴 / test

This verifies we don't add GTT as allowed domain for APUs when USWC is disabled. Signed-off-by:

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

+8 −1

Original line number	Diff line number	Diff line
		@@ -500,8 +500,15 @@ uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev)
		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
		* 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.
		*/
		if (adev->asic_type >= CHIP_CARRIZO && adev->asic_type < CHIP_RAVEN &&
		adev->flags & AMD_IS_APU &&
		adev->flags & AMD_IS_APU && amdgpu_bo_support_uswc(0) &&
		amdgpu_device_asic_has_dc_support(adev->asic_type))
		domain \|= AMDGPU_GEM_DOMAIN_GTT;
		#endif