Re: [PATCH V8 24/43] drm/amd/display: Skip color pipeline initialization for cursor plane

[Harry Wentland]

On 2025-04-01 11:45, Melissa Wen wrote:
> On 03/31, Xaver Hugl wrote:
>>> Cursor plane has no color pipeline and thus it has no colorop either. It
>>> inherits color processing from its parent plane.
>>
>> Just to be sure: That means amdgpu will reject atomic commits that try
>> to set a color pipeline on the primary plane while showing the cursor
>> plane on top of it? Just like with scaling?
> 
> Isn't AMD driver resorting to overlay cursor mode when scaling?
> 
> In addition, isn't it a case of using overlay cursor mode when setting a
> color pipeline for cursor?
> 

Yes, AMD driver is using the overlay cursor (entire dedicated
HW pipe) for the cursor when the cursor scaling doesn't match
the underlying plane.

The same thing can be done for color operations but it's not
implemented yet.

Harry

> Melissa