Implementation of https://lkml.org/lkml/2021/5/12/764 now feature complete albeit not fully tested. I have now corrected the DSC behavior, but still no wait to test it. Exact dithering behavior remains a mistery so in case dithering is active it's not 100% clear what "active bpc" means, or where the "max bpc" limit is applied. I have no DP MST splitter at hand. I tried my best to not break anything, but if one who has one could test it would be very helpful. Things on my TODO list: - add "min bpc" property - rewrite "preferred color format" to "force color format" - make "Broadcast RGB" only affect RGB on AMD too - remove unreachable enums of "active/preferred/force color format"
