[PATCH 12/12] drm: rockchip: Add VOP2 driver

[Nicolas Frattaroli]

On Mittwoch, 17. November 2021 15:33:47 CET Sascha Hauer wrote:
> The VOP2 unit is found on Rockchip SoCs beginning with rk3566/rk3568.
> It replaces the VOP unit found in the older Rockchip SoCs.
> 
> This driver has been derived from the downstream Rockchip Kernel and
> heavily modified:
> 
> - All nonstandard DRM properties have been removed
> - dropped struct vop2_plane_state and pass around less data between
>   functions
> - Dropped all DRM_FORMAT_* not known on upstream
> - rework register access to get rid of excessively used macros
> 
> The driver is tested with HDMI and MIPI-DSI display on a RK3568-EVB
> board. Overlay support is tested with the modetest utility. AFBC support
> is still present in the driver, but currently untested due to the lack
> of suitable image sources. Also the driver has been tested with weston
> using pixman and (yet to be upstreamed) panfrost driver support.
> 
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> ---

Hi Sascha,

thank you very much for your work on this! I gave it a try tonight,
and unfortunately it appears to currently always attempt to use
1920x1080p60 as the mode regardless of the monitor. For example,
on an old 720p monitor I had laying around:

	[  225.732342] rockchip-drm display-subsystem: [drm] Update mode to 1920x1080p60, type: 11 for vp0, output 0x00000800  HDMI0

This results in a broken picture (all white with occasional glitches).
Somebody else observed the same behaviour on a 1440p monitor.

Thanks,
Nicolas Frattaroli