[Bug 70934] [Regression] Problem with colors (depth?) on DCE5 Barts (HD69xx)

https://bugs.freedesktop.org/show_bug.cgi?id=70934

--- Comment #12 from Rafał Miłecki zajec5@gmail.com --- Created attachment 88238 --> https://bugs.freedesktop.org/attachment.cgi?id=88238&action=edit drm/radeon: enable FMT dither for non-DP-bridge eDP

I needed this patch to be able to see "dither" property for eDP, but it doesn't change anything. I did: xrandr --output eDP --set dither on (and noticed changed in xrandr --prop), but it didn't improve colors for me.

I've also tried: xrandr --output eDP --off; sleep 1s; xrandr --output eDP --auto but it also didn't help.

Is dither supported for eDP at all?