[PATCH 13/33] drm/amd/display: allocate fbc buffer in AMDGPU_GEM_DOMAIN_GTT

[Harry Wentland]

On 2018-02-26 04:26 PM, Alex Deucher wrote:
> On Mon, Feb 26, 2018 at 3:15 PM, Harry Wentland <harry.wentland at amd.com> wrote:
>> From: Shirish S <shirish.s at amd.com>
>>
>> Currently the FBC buffer is allocated in VRAM, since VRAM usage is
>> dedicatedly for scanouts, by allocating FBC back buffer in GTT
>> shall help in conserving VRAM for other purposes.
> 
> Are there any dGPUs that support FBC?  If so, will this be an issue there?
> 

We only create dc->fbc_compressor for DCE11 (CZ/ST) so amdgpu_dm_fbc_init will early return.

See dce110_resource.c's construct()

Harry

> Alex
> 
>>
>> Signed-off-by: Shirish S <shirish.s at amd.com>
>> Reviewed-by: Charlene Liu <Charlene.Liu at amd.com>
>> Acked-by: Harry Wentland <harry.wentland at amd.com>
>> ---
>>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> index f782518fc424..64a3abed2466 100644
>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> @@ -374,7 +374,7 @@ static void amdgpu_dm_fbc_init(struct drm_connector *connector)
>>
>>         if (max_size) {
>>                 int r = amdgpu_bo_create_kernel(adev, max_size * 4, PAGE_SIZE,
>> -                           AMDGPU_GEM_DOMAIN_VRAM, &compressor->bo_ptr,
>> +                           AMDGPU_GEM_DOMAIN_GTT, &compressor->bo_ptr,
>>                             &compressor->gpu_addr, &compressor->cpu_addr);
>>
>>                 if (r)
>> --
>> 2.14.1
>>
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