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

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Message-ID: <CAD=FV=XSzVx2aoTshrh-ZmaQ-uFqhzw6iZPSBzmeMenjvTs2Zw@mail.gmail.com>
Date:   Mon, 25 Sep 2023 15:53:43 -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 Sun, Sep 24, 2023 at 10:47 PM Laurentiu Palcu
<laurentiu.palcu@....nxp.com> wrote:
>
> Hi Doug,
>
> On Fri, Sep 22, 2023 at 08:44:16AM -0700, Doug Anderson wrote:
> > 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.
>
> Yes, please do. The i.MX8MQ DCSS patches go through drm-misc.

OK, landed in drm-misc-next:

89755ee1d593 drm/imx/dcss: Call drm_atomic_helper_shutdown() at shutdown time


> > 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.
>
> Thanks, that sounds good.

https://lore.kernel.org/r/20230925154929.1.I3287e895ce8e68d41b458494a49a1b5ec5c71013@changeid