[PATCH 2/2] amd/display: add cursor check for YUV primary plane

[Simon Ser]

On Friday, February 19th, 2021 at 6:22 PM, Kazlauskas, Nicholas <nicholas.kazlauskas at amd.com> wrote:

> We can support cursor plane, but only if we have an overlay plane
> enabled that's using XRGB/ARGB.
>
> This is what we do on Chrome OS for video playback:
>
> Cursor Plane - ARGB8888
> Overlay Plane - ARGB8888 Desktop/UI with cutout for video
> Primary Plane - NV12 video
>
> So this new check would break this usecase. It needs to check that there
> isn't an XRGB/ARGB plane at the top of the blending chain instead.

Oh, interesting. I'll adjust the patch.

Related: how does this affect scaling? Right now there is a check that makes
sure the cursor plane scaling matches the primary plane's. Should we instead
check that the cursor plane scaling matches the top-most XRGB/ARGB plane's?