[PATCH] drm/amdgpu: Clear VRAM for DRM dumb_create buffers

[Alex Deucher]

On Fri, Mar 8, 2019 at 10:38 AM Nicholas Kazlauskas
<nicholas.kazlauskas at amd.com> wrote:
>
> 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 at amd.com>

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> index fcaaac30e84b..a58072bbc9b8 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> @@ -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;
> --
> 2.17.1
>
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