On Sunday, October 22nd, 2023 at 12:12, Michel Dänzer <michel.daenzer@xxxxxxxxxxx> wrote: > On 10/17/23 14:16, Simon Ser wrote: > > > After discussing with André it seems like we missed a plane type check > > here. We need to make sure FB_ID changes are only allowed on primary > > planes. > > Can you elaborate why that's needed? Current drivers are in general not prepared to perform async page-flips on planes other than primary. For instance I don't think i915 has logic to perform async page-flip on an overlay plane FB_ID change.