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drm/amdgpu: Clear VRAM for DRM dumb_create buffers 

The dumb_create API isn't intended for high performance rendering
and it's more useful for userspace (ie. IGT) to have them precleared.

The bonus here is that we also won't needlessly leak whatever was
previously in VRAM, but it also probably wasn't sensitive if it was
going through this API.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
hifive-unleashed-5.2
Nicholas Kazlauskas 2019-03-08 10:38:16 -05:00 committed by Alex Deucher
parent 289d513b17
commit 95b1346872
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
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@ -743,7 +743,8 @@ int amdgpu_mode_dumb_create(struct drm_file *file_priv,
domain = amdgpu_bo_get_preferred_pin_domain(adev,
amdgpu_display_supported_domains(adev));
r = amdgpu_gem_object_create(adev, args->size, 0, domain,
AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
AMDGPU_GEM_CREATE_VRAM_CLEARED,
ttm_bo_type_device, NULL, &gobj);
if (r)
return -ENOMEM;