On Monday, March 29th, 2021 at 5:39 PM, Paul Cercueil <paul@xxxxxxxxxxxxxxx> wrote: > Ok, I read that as "all drivers should provide AT LEAST one primary > plane per CRTC", and not as "all drivers should provide ONE AND ONLY > ONE primary plane per CRTC". My bad. Yeah, it's a little complicated to document, because it's possible for a primary plane to be compatible with multiple CRTCs… We tried to improve this [1] recently. [1]: https://dri.freedesktop.org/docs/drm/gpu/drm-kms.html#plane-abstraction