On Wednesday, February 10th, 2021 at 2:16 PM, Daniel Vetter <daniel@xxxxxxxx> wrote: > On Tue, Feb 09, 2021 at 04:14:01PM -0800, Manasi Navare wrote: > > > These additional checks added to avoid EBUSY give unnecessary WARN_ON > > in case of big joiner used in i915 in which case even if the modeset > > is requested on a single pipe, internally another consecutive > > pipe is stolen and used to drive half of the transcoder timings. > > So in this case it is expected that requested crtc and affected crtcs > > do not match. Hence the added WARN ON becomes irrelevant. The WARN_ON only happens if allow_modeset == false. If allow_modeset == true, then the driver is allowed to steal an unrelated pipe. Maybe i915 is stealing a pipe without allow_modeset? > Nope. We can maybe rework this so that i915 can do stuff under the hood, > but wrt uapi this was the thing we discussed with compositors. Without > such a guarantee atomic is defacto broken from a compositor pov. Agreed. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
