[Why] The custom "max bpc" property was added to limit color depth while the DRM one was still being merged. It's been a few kernel versions since then and this TODO was still sticking around. [How] Attach the DRM max bpc property to the connector and drop all of our custom property management. Set the max bpc to 8 by default since DRM defaults to the max in the range which would be 16 in this case. No behavioral changes are intended with this patch, it should just be a refactor. v2: Don't force 8bpc when no state is given Cc: Leo Li <sunpeng.li@amd.com> Cc: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>