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

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On Sat, 27 Mar 2021 11:26:26 +0000
Paul Cercueil <paul@xxxxxxxxxxxxxxx> wrote:

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

What's the difference between the two background planes?

How will generic userspace know to pick the "right" one?


Thanks,
pq

> Le sam. 27 mars 2021 à 11:24, Simon Ser <contact@xxxxxxxxxxx> a écrit 
> :
> > On Saturday, March 27th, 2021 at 12:22 PM, Paul Cercueil 
> > <paul@xxxxxxxxxxxxxxx> 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?  
> 
> 
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