Am Mittwoch, 7. Februar 2018, 17:31:48 CET schrieb Enric Balletbo i Serra:
> From: Yakir Yang <>
> The pclk_vio_grf supply power for VIO GRF IOs, if it is disabled,
> driver would failed to operate the VIO GRF registers.
> The clock is optional but one of the side effects of don't have this clk
> is that the Samsung Chromebook Plus fails to recover display after a
> suspend/resume with following errors:
>     rockchip-dp ff970000.edp: Input stream clock not detected.
>     rockchip-dp ff970000.edp: Timeout of video streamclk ok
>     rockchip-dp ff970000.edp: unable to config video
> Signed-off-by: Yakir Yang <>
> Signed-off-by: Enric Balletbo i Serra <>

as you said in IRC that his should also fix the failures when rockchip-drm
is build as module, I've applied this patch as fix for 4.16


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