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Date:   Mon, 4 Sep 2023 08:56:28 +0100
From:   "Russell King (Oracle)" <linux@armlinux.org.uk>
To:     Douglas Anderson <dianders@chromium.org>
Cc:     dri-devel@lists.freedesktop.org,
        Maxime Ripard <mripard@kernel.org>, airlied@gmail.com,
        daniel@ffwll.ch, linux-kernel@vger.kernel.org
Subject: Re: [RFT PATCH 01/15] drm/armada: Call drm_atomic_helper_shutdown()
 at shutdown time
Message-ID: <ZPWNrHguTGvRlAxz@shell.armlinux.org.uk>
References: <20230901234202.566951-1-dianders@chromium.org>
 <20230901164111.RFT.1.I3d5598bd73a59b5ded71430736c93f67dc5dea61@changeid>
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Sender: Russell King (Oracle) <linux@armlinux.org.uk>
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On Fri, Sep 01, 2023 at 04:41:12PM -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.
> 
> This driver was fairly easy to update. The drm_device is stored in the
> drvdata so we just have to make sure the drvdata is NULL whenever the
> device is not bound. To make things simpler,
> drm_atomic_helper_shutdown() has been modified to consider a NULL
> drm_device as a noop in the patch ("drm/atomic-helper:
> drm_atomic_helper_shutdown(NULL) should be a noop").
> 
> Suggested-by: Maxime Ripard <mripard@kernel.org>
> Signed-off-by: Douglas Anderson <dianders@chromium.org>

As the listed driver author for the reasons I've stated - NAK.

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