linux-kernel - Re: [PATCH] drm: meson_drv add shutdown function

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Message-ID: <7hsg541aio.fsf@baylibre.com>
Date:   Tue, 09 Mar 2021 09:50:55 -0800
From:   Kevin Hilman <khilman@...libre.com>
To:     Neil Armstrong <narmstrong@...libre.com>,
        Artem Lapkin <email2tema@...il.com>
Cc:     jbrunet@...libre.com, martin.blumenstingl@...glemail.com,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        christianshewitt@...il.com, art@...das.com, nick@...das.com,
        gouwa@...das.com
Subject: Re: [PATCH] drm: meson_drv add shutdown function

Neil Armstrong <narmstrong@...libre.com> writes:

> On 09/03/2021 18:13, Kevin Hilman wrote:
>> Hi Neil,
>> 
>> Neil Armstrong <narmstrong@...libre.com> writes:
>> 
>>> On 02/03/2021 05:22, Artem Lapkin wrote:
>>>> Problem: random stucks on reboot stage about 1/20 stuck/reboots
>>>> // debug kernel log
>>>> [    4.496660] reboot: kernel restart prepare CMD:(null)
>>>> [    4.498114] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown begin
>>>> [    4.503949] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown domain 0:VPU...
>>>> ...STUCK...
>>>>
>>>> Solution: add shutdown function to meson_drm driver 
>>>> // debug kernel log
>>>> [    5.231896] reboot: kernel restart prepare CMD:(null)
>>>> [    5.246135] [drm:meson_drv_shutdown]
>>>> ...
>>>> [    5.259271] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown begin
>>>> [    5.274688] meson_ee_pwrc c883c000.system-controller:power-controller: shutdown domain 0:VPU...
>>>> [    5.338331] reboot: Restarting system
>>>> [    5.358293] psci: PSCI_0_2_FN_SYSTEM_RESET reboot_mode:0 cmd:(null)
>>>> bl31 reboot reason: 0xd
>>>> bl31 reboot reason: 0x0
>>>> system cmd  1.
>>>> ...REBOOT...
>>>>
>>>> Tested: on VIM1 VIM2 VIM3 VIM3L khadas sbcs - 1000+ successful reboots
>>>> and Odroid boards, WeTek Play2 (GXBB)
>>>>
>>>> Tested-by: Christian Hewitt <christianshewitt@...il.com>
>>>> Signed-off-by: Artem Lapkin <art@...das.com>
>>>>
>>>> ---
>>>>  drivers/gpu/drm/meson/meson_drv.c | 11 +++++++++++
>>>>  1 file changed, 11 insertions(+)
>>>>
>>>> diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c
>>>> index 42c5d3246..693bb1293 100644
>>>> --- a/drivers/gpu/drm/meson/meson_drv.c
>>>> +++ b/drivers/gpu/drm/meson/meson_drv.c
>>>> @@ -482,6 +482,16 @@ static int meson_probe_remote(struct platform_device *pdev,
>>>>  	return count;
>>>>  }
>>>>  
>>>> +static void meson_drv_shutdown(struct platform_device *pdev)
>>>> +{
>>>> +	struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
>>>> +	struct drm_device *drm = priv->drm;
>>>> +
>>>> +	DRM_DEBUG_DRIVER("\n");
>>>> +	drm_kms_helper_poll_fini(drm);
>>>> +	drm_atomic_helper_shutdown(drm);
>>>> +}
>>>> +
>>>>  static int meson_drv_probe(struct platform_device *pdev)
>>>>  {
>>>>  	struct component_match *match = NULL;
>>>> @@ -553,6 +563,7 @@ static const struct dev_pm_ops meson_drv_pm_ops = {
>>>>  
>>>>  static struct platform_driver meson_drm_platform_driver = {
>>>>  	.probe      = meson_drv_probe,
>>>> +	.shutdown   = meson_drv_shutdown,
>>>>  	.driver     = {
>>>>  		.name	= "meson-drm",
>>>>  		.of_match_table = dt_match,
>>>>
>>>
>>> Applied to drm-misc-fixes,
>> 
>> Could you submit this as a fix to stable (v5.10+) also?
>
> It should be done automagically since I added the Fixes tag

Oh, I didn't see the fixes tag, sorry.

Thanks!

Kevin