Re: [PATCH v11 5/5] soc / drm: mediatek: Fix mediatek-drm device probing

[Matthias Brugger]

On 11/03/2020 12:56, Enric Balletbo i Serra wrote:
> In the actual implementation the same compatible string
> "mediatek,<chip>-mmsys" is used to bind the clock drivers
> (drivers/soc/mediatek) as well as to the gpu driver
> (drivers/gpu/drm/mediatek/mtk_drm_drv.c). This ends with the problem
> that the only probed driver is the clock driver and there is no display
> at all.
> 
> In any case having the same compatible string for two drivers is not
> correct and should be fixed. To fix this, and maintain backward
> compatibility, we can consider that the mmsys driver is the top-level
> entry point for the multimedia subsystem, so is not a pure clock
> controller but a system controller, and the drm driver is instantiated
> by that MMSYS driver.
> 
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
> Reviewed-by: CK Hu <ck.hu@xxxxxxxxxxxx>

Same here.