On Wed, 25 May 2022 06:04:44 +0000 Simon Ser <contact@xxxxxxxxxxx> wrote: > On Wednesday, May 25th, 2022 at 00:03, Alex Deucher <alexdeucher@xxxxxxxxx> wrote: > > > > Why would anyone want to run at 8bpc when they have a panel with > > > higher color depth? So I think someone is going to be doing that > > > modeset eventually anyway. > > > > We used to do something similar, but then got piles of bug reports > > about the displays running at 30Hz rather than 60 so we changed it to > > 8. It's hard to say what a user will prefer. > > "max bpc" is a maximum, ie. it shouldn't make a modeset fail, the kernel > should automatically reduce the bpc if the link bandwidth is insufficient. > So that sounds like there's an amdgpu bug here? Yes, that's an amdgpu bug in my opinion too. A video mode is always explicit about timings, while "max bpc" is just a max and not "use this exactly", so I believe the explicit setting should win. There is no "use this bpc exactly" KMS UAPI yet. Thanks, pq
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