[PATCH RESEND v9 2/2] drm/amdgpu: Enable async flip on overlay planes

[André Almeida]

Hi Harry, thanks for the reply!

Em 11/11/2024 18:10, Harry Wentland escreveu:
> On 2024-11-01 14:23, André Almeida wrote:
>> amdgpu can handle async flips on overlay planes, so allow it for atomic
>> async checks.
>>
>> Signed-off-by: André Almeida <andrealmeid at igalia.com>
>> ---
>>   drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c | 3 +--
>>   1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
>> index 495e3cd70426db0182cb2811bc6d5d09f52f8a4b..4c6aed5ca777d76245f5f2865046f0f598be342a 100644
>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
>> @@ -1266,8 +1266,7 @@ static int amdgpu_dm_plane_atomic_async_check(struct drm_plane *plane,
>>   	struct drm_plane_state *new_plane_state;
>>   	struct dm_crtc_state *dm_new_crtc_state;
>>   
>> -	/* Only support async updates on cursor planes. */
>> -	if (plane->type != DRM_PLANE_TYPE_CURSOR)
>> +	if (plane->type != DRM_PLANE_TYPE_CURSOR && plane->type != DRM_PLANE_TYPE_OVERLAY)
> 
> This wouldn't just be called for flips, though, but could also be
> called for updates on a plane, right? Those could cause for problems.
> 

I see, I think you are right and can be called from a non-flip commmit.

> There's also nothing special about OVERLAY vs PRIMARY planes, other
> than that amdgpu needs a PRIMARY plane, IIRC. So updates on PRIMARY
> planes should also work (or not).
> 

Right, the PRIMARY plane type is already supported for every DRM driver 
in the API so I didn't explicitly added it here.

> Maybe this should check that we're actually dealing with a simple
> flip, i.e., a simple surface address update.
> 

Right, that makes sense to me, thanks!

> Harry
> 
>>   		return -EINVAL;
>>   
>>   	new_plane_state = drm_atomic_get_new_plane_state(state, plane);
>>
>