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

From: CK Hu <[email-masked]>
Date: Wed, 11 Mar 2020 21:35:26 +0800

On Wed, 2020-03-11 at 14:26 +0100, Matthias Brugger wrote:
> 
> 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 <[email-masked]>
> > Reviewed-by: CK Hu <[email-masked]>
> 
> Same here.

Acked-by: CK Hu <[email-masked]>
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