From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
From: Artem Lapkin <art@xxxxxxxxxx>
commit fa0c16caf3d73ab4d2e5d6fa2ef2394dbec91791 upstream.
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")
Signed-off-by: Artem Lapkin <art@xxxxxxxxxx>
Tested-by: Christian Hewitt <christianshewitt@xxxxxxxxx>
Acked-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Acked-by: Kevin Hilman <khilman@xxxxxxxxxxxx>
Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20210302042202.3728113-1-art@xxxxxxxxxx
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/meson/meson_drv.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/drivers/gpu/drm/meson/meson_drv.c
+++ b/drivers/gpu/drm/meson/meson_drv.c
@@ -384,6 +384,16 @@ static int meson_probe_remote(struct pla
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;
@@ -428,6 +438,7 @@ MODULE_DEVICE_TABLE(of, dt_match);
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,
