On 21 September 2015 at 09:05, Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> wrote: > This is fix for a regression introduced by 27321ae88c70104df > "drm/i915: Use the disable callback for disabling planes." > > Disabling invisible planes may cause recalculation of > watermarks, which is a problem because the software state > is not yet in sync with the hardware state. > This may result in a black screen during kernel boot and > plymouth splash until any input action is performed in X. > > Explicitly checking for plane visibility fixes the regression. > This is a patch for v4.2 only, v4.3 needs a different fix because > it was fixed by d032ffa04cf7c6f > "drm/i915: Handle disabling planes better, v2." > > but later broken again in > 4cf0ebbd4fafbdf "drm/i915: Rework plane readout." > > This will be fixed in v4.3 by: > "drm/i915: Add .get_hw_state() method for planes" > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91952 > Cc: João Paulo Rechi Vita <jprvita@xxxxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx # v4.2 only Tested-by: João Paulo Rechi Vita <jprvita@xxxxxxxxxxxx> _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
