drm/rockchip: vop: Support dithering to RGB666

Splits out the dither register bits and introduces
the same config enumerations as in the rockchip kernel tree.
Tested to fix the banding on my ASUS C201.

Signed-off-by: Urja Rannikko <urjaman@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20190318154412.26994-1-urjaman@gmail.com
This commit is contained in:
Urja Rannikko 2019-03-18 15:44:12 +00:00 • committed by Heiko Stuebner
commit a5c0fa44e9
3 changed files with 41 additions and 4 deletions