On 2018-05-22 01:22 AM, Deepak Sharma wrote:
> When vram size <= THRESHOLD(256M) lets use GTT for dumb buffer
> allocation. As SG will be enabled with vram size <= 256M
> scan out will not be an issue.
>
> Signed-off-by: Deepak Sharma <[email protected]>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> index 2c8e27370284..c547d92dbf4e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> @@ -749,15 +749,18 @@ int amdgpu_mode_dumb_create(struct drm_file *file_priv,
> struct amdgpu_device *adev = dev->dev_private;
> struct drm_gem_object *gobj;
> uint32_t handle;
> + u32 domain;
> int r;
>
> args->pitch = amdgpu_align_pitch(adev, args->width,
> DIV_ROUND_UP(args->bpp, 8), 0);
> args->size = (u64)args->pitch * args->height;
> args->size = ALIGN(args->size, PAGE_SIZE);
> + domain = AMDGPU_GEM_DOMAIN_VRAM;
> + if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD)
> + domain = AMDGPU_GEM_DOMAIN_GTT;
This could choose GTT even in cases where scanout from that isn't
supported.
It should call amdgpu_display_supported_domains, and then use the same
logic as in amdgpu_bo_pin_restricted:
if (domain == (AMDGPU_GEM_DOMAIN_VRAM | AMDGPU_GEM_DOMAIN_GTT)) {
domain = AMDGPU_GEM_DOMAIN_VRAM;
if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD)
domain = AMDGPU_GEM_DOMAIN_GTT;
}
Maybe this logic could be refactored into a helper function.
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
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