linux-kernel - Re: [PATCH v3 1/2] soc: imx: gpc: Disable 6sl display power gating for ERR006287

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Date:   Wed, 11 Jul 2018 15:21:55 +0300
From:   Leonard Crestez <leonard.crestez@....com>
To:     Lucas Stach <l.stach@...gutronix.de>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Shawn Guo <shawnguo@...nel.org>
Cc:     Fabio Estevam <fabio.estevam@....com>, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-imx@....com, kernel@...gutronix.de
Subject: Re: [PATCH v3 1/2] soc: imx: gpc: Disable 6sl display power gating
 for ERR006287

On Wed, 2018-07-11 at 14:16 +0200, Lucas Stach wrote:
> Am Mittwoch, den 11.07.2018, 15:11 +0300 schrieb Leonard Crestez:
> > Handle this in the safest possible way by keeping the DISP domain
> > always-on.
> > 
> > Signed-off-by: Leonard Crestez <leonard.crestez@....com>
> 
> Reviewed-by: Lucas Stach <l.stach@...gutronix.de>
> 
> Can you send a follow on patch to switch the i.MX6QP errata workaround
> to use GENPD_FLAG_ALWAYS_ON and remove the -EBUSY stuff in the power
> down path?

Sure.

I was thinking of converting it to a new GENPD_FLAG which allows
power_off in suspend (as suggested by Ulf) but switching to
GENPD_FLAG_ALWAYS_ON in order to simplify the code could be done first.

The -EBUSY stuff is not very harmful.

--
Regards,
Leonard