KMS to multiple displays, was Re: Building a graph for HDR10 output - stumped at sink

Nicolas Dufresne nicolas at
Sat Apr 23 12:49:12 UTC 2022

Le samedi 23 avril 2022 à 16:24 +0530, Nirbheek Chauhan a écrit :
> On Sat, Apr 23, 2022 at 3:30 AM Nicolas Dufresne via gstreamer-devel
> <gstreamer-devel at> wrote:
> > Though, to get out of the toy land, kmssink would need perhap to be ported to
> > use atomic API, which notably allow trying calls without affecting other
> > surfaces. That would build up to the need for a shared display manager (also
> > known as a compositor), specially to coordinate mode setting. Which mostly boils
> > down to, why not use a proper compositor ?
> > 
> Presumably the HDR10 requirement precludes the use of a compositor? Or
> do we now have a Linux compositor that correctly implements HDR
> features?

"correctly" is a vast requirement. Wayland protocol for HDR10 (and up) is still
under development. Here's some lecture:

> Cheers,
> Nirbheek

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