[PATCH] drm: meson_drv add shutdown function

[Kevin Hilman]

Hi Neil,

Neil Armstrong <narmstrong at baylibre.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 at gmail.com>
>> Signed-off-by: Artem Lapkin <art at khadas.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?

Thanks,

Kevin