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* [PATCH] drm: meson_drv add shutdown function
@ 2021-03-02  4:22 Artem Lapkin
  2021-03-08  9:00 ` Neil Armstrong
                   ` (2 more replies)
  0 siblings, 3 replies; 7+ messages in thread
From: Artem Lapkin @ 2021-03-02  4:22 UTC (permalink / raw)
  To: narmstrong
  Cc: gouwa, martin.blumenstingl, khilman, christianshewitt,
	linux-kernel, dri-devel, nick, linux-amlogic, art,
	linux-arm-kernel, jbrunet

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@gmail.com>
Signed-off-by: Artem Lapkin <art@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,
-- 
2.25.1


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^ permalink raw reply related	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2021-03-09 17:51 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-03-02  4:22 [PATCH] drm: meson_drv add shutdown function Artem Lapkin
2021-03-08  9:00 ` Neil Armstrong
2021-03-08 17:30 ` Kevin Hilman
2021-03-09  8:23 ` Neil Armstrong
2021-03-09 17:13   ` Kevin Hilman
2021-03-09 17:22     ` Neil Armstrong
2021-03-09 17:50       ` Kevin Hilman

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