Re: [PATCH] drm: DON'T require each CRTC to have a unique primary plane

[Paul Cercueil]

It has two mutually exclusive background planes (same Z level) + one 
overlay plane.

-Paul

Le sam. 27 mars 2021 à 11:24, Simon Ser <cont...@emersion.fr> a écrit 
:
On Saturday, March 27th, 2021 at 12:22 PM, Paul Cercueil 
<p...@crapouillou.net> wrote:

 The ingenic-drm driver has two mutually exclusive primary planes
 already; so the fact that a CRTC must have one and only one primary
 plane is an invalid assumption.

Why does this driver expose two primary planes, if it only has a 
single
CRTC?