Comment # 12 on bug 83226 from Andy Furniss

(In reply to John from comment #10)
> I've applied the patches but I am not sure how to enable anything.
> Since it's a drm patch, am I suppose to enable that the same way I do for
> audio and dpm?
> If so, I haven't tried, but I don't see anything in modinfo for csc.

xrandr --verbose will show you the options/output name and the current setting.

to change do something like -

xrandr --output HDMI-0 --set output_csc tvrgb