linux-kernel - Re: [RFT PATCH v2 01/12] drm/imx/dcss: Call drm_atomic_helper

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Message-ID: <CAD=FV=ViV-n2T1Bup+XScsWD11yWpTmW3qEOLTTDj3kTtTY4Cg@mail.gmail.com>
Date:   Fri, 22 Sep 2023 08:44:16 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Laurentiu Palcu <laurentiu.palcu@....nxp.com>
Cc:     dri-devel@...ts.freedesktop.org,
        Maxime Ripard <mripard@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>, airlied@...il.com,
        daniel@...ll.ch, festevam@...il.com, kernel@...gutronix.de,
        l.stach@...gutronix.de, linux-arm-kernel@...ts.infradead.org,
        linux-imx@....com, linux-kernel@...r.kernel.org,
        shawnguo@...nel.org
Subject: Re: [RFT PATCH v2 01/12] drm/imx/dcss: Call drm_atomic_helper_shutdown()
 at shutdown time

Hi,

On Fri, Sep 22, 2023 at 12:56 AM Laurentiu Palcu
<laurentiu.palcu@....nxp.com> wrote:
>
> Hi,
>
> On Thu, Sep 21, 2023 at 12:26:44PM -0700, Douglas Anderson wrote:
> > Based on grepping through the source code this driver appears to be
> > missing a call to drm_atomic_helper_shutdown() at system shutdown
> > time. Among other things, this means that if a panel is in use that it
> > won't be cleanly powered off at system shutdown time.
> >
> > The fact that we should call drm_atomic_helper_shutdown() in the case
> > of OS shutdown/restart comes straight out of the kernel doc "driver
> > instance overview" in drm_drv.c.
> >
> > Suggested-by: Maxime Ripard <mripard@...nel.org>
> > Reviewed-by: Maxime Ripard <mripard@...nel.org>
> > Signed-off-by: Douglas Anderson <dianders@...omium.org>
>
> No issues found on i.MX8MQ.
>
> Tested-by: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
> Reviewed-by: Laurentiu Palcu <laurentiu.palcu@....nxp.com>

Thanks! Would you expect this patch to land through drm-misc? If so,
I'm happy to commit it there with your tags. If patches to this driver
normally flow through drm-misc, I'm also happy to post a patch to
MAINTAINERS (or review a patch you post) adding this to the entry for
"NXP i.MX 8MQ DCSS DRIVER":

T:     git git://anongit.freedesktop.org/drm/drm-misc

...which would make it obvious in the future that things should land
through drm-misc. This is similar to what I did for commit
92e62478b62c ("MAINTAINERS: Update DRM DRIVERS FOR FREESCALE IMX
entry"). :-)

-Doug