Re: [PATCH] drm/tidss: Soft Reset DISPC on startup

From: Nishanth Menon
Date: Tue Apr 12 2022 - 19:30:03 EST


On 17:24-20220412, Tomi Valkeinen wrote:
> Hi,
>
> On 14/03/2022 13:37, Devarsh Thakkar wrote:
> > Soft reset the display subsystem controller on startup and wait for
> > the reset to complete. This helps the scenario where display was
> > already in use by some other core before the linux was booted.
>
> The reason the omapdrm doesn't do a reset is that the PM features on some of
> the DSS registers were set and controlled outside dss driver, so the dss
> driver could not do a reset just like that. That design was carried to the
> tidss driver, although I'm not sure if the reason is valid on AM6 and J7
> platforms.
>
> If that reasoning is not valid, this patch is ok and:
>
> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
>

Tony - sysc control for older omap devices still control this directly?

--
Regards,
Nishanth Menon
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