On Tuesday, January 3rd, 2023 at 23:46, Rob Clark <robdclark@xxxxxxxxx> wrote: > drive-by thought/concern, what are the odds that there is some wayland > compositor out there that creates an fb for every window surface, even > if it later decides to composite on the GPU because the display does > not support the format? It seems like there is a non-zero chance of > breaking userspace.. User-space is prepared for ADDFB2 to fail. Other drivers already reject IOCTLs with FB parameters not supported for scanout.