From: Dom Cobley popcornmix@gmail.com
[ Upstream commit a8e47884f1906cd7440fafa056adc8817568e73e ]
Currently we schedule a call to output_poll_execute from drm_kms_helper_poll_enable for 10s in future. Later we try to replace that in drm_helper_probe_single_connector_modes with a 0s schedule with delayed_event set.
But as there is already a job in the queue this fails, and the immediate job we wanted with delayed_event set doesn't occur until 10s later.
And that call acts as if connector state has changed, reprobing modes. This has a side effect of waking up a display that has been blanked.
Make sure we cancel the old job before submitting the immediate one.
Fixes: 162b6a57ac50 ("drm/probe-helper: don't lose hotplug event") Acked-by: Daniel Vetter daniel@ffwll.ch Signed-off-by: Dom Cobley popcornmix@gmail.com [Maxime: Switched to mod_delayed_work] Signed-off-by: Maxime Ripard maxime@cerno.tech Link: https://patchwork.freedesktop.org/patch/msgid/20230127154052.452524-1-maxime... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/drm_probe_helper.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c index 69b0b2b9cc1c5..3b968ad187cf3 100644 --- a/drivers/gpu/drm/drm_probe_helper.c +++ b/drivers/gpu/drm/drm_probe_helper.c @@ -557,8 +557,9 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector, */ dev->mode_config.delayed_event = true; if (dev->mode_config.poll_enabled) - schedule_delayed_work(&dev->mode_config.output_poll_work, - 0); + mod_delayed_work(system_wq, + &dev->mode_config.output_poll_work, + 0); }
/* Re-enable polling in case the global poll config changed. */