On 10/23/23 10:27, Simon Ser wrote: > 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. That should be handled in the driver's atomic_check then? Async flips of overlay planes would be useful e.g. for presenting a windowed application with tearing, while the rest of the desktop is tear-free. -- Earthling Michel Dänzer | https://redhat.com Libre software enthusiast | Mesa and Xwayland developer
