Though AMDGPU_GEM_CREATE_CPU_GTT_USWC is initially used for GTT, but this flag is bound to drm_arch_can_wc_memory(), and if arch doesn't support WC, then VRAM should not use WC. Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx> --- drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c index 5ac7b55..04299f5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c @@ -136,8 +136,10 @@ void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain) places[c].fpfn = 0; places[c].lpfn = 0; - places[c].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | - TTM_PL_FLAG_VRAM; + places[c].flags = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM; + + if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) + places[c].flags |= TTM_PL_FLAG_WC; if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) places[c].lpfn = visible_pfn; -- 2.7.0
