On Wed, Feb 28, 2024 at 10:02:12AM +0200, Stanislav Lisovskiy wrote: > According to BSpec we need to do correspondent MBUS updates before > or after DBUF reallocation, depending on whether we are reducing > or increasing amount of pipes(typical scenario is swithing between > multiple and single displays). > > As of BSpec 49213 if we are swithing from multiple to single display > MBUS registers should be updated with correspondent values _before_ > Dbuf reallocation happens, however if we are switching from single > display to multiple then it should happen _after_ DDB reallocation(i.e > plane programming). > > Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx> Thank you for this patch, Stanislav! We tested it on a MTL-U based Chromebook (Screebo), using different configurations (eDP, eDP + HDMI, HDMI, etc.), and it worked well -- joined the mbus + no visual issues or i915 errors. Tested-by: Paz Zcharya <pazz@xxxxxxxxxxxx>
