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)
>
Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller")
> Tested-by: Christian Hewitt <christianshewitt@xxxxxxxxx>
> Signed-off-by: Artem Lapkin <art@xxxxxxxxxx>
>
> ---
> 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,
>
Acked-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
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