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 <che...@lemote.com>
---
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
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