This is a note to let you know that I've just added the patch titled
drm/panel-edp: use put_sync in unprepare
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-panel-edp-use-put_sync-in-unprepare.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4aa24d4c1719587dba5928594787c3ae004fd053
Author: Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx>
Date: Wed Dec 20 14:13:11 2023 -0800
drm/panel-edp: use put_sync in unprepare
[ Upstream commit 49ddab089611ae5ddd0201ddbbf633da75bfcc25 ]
Some edp panel requires T10 (Delay from end of valid video data transmitted
by the Source device to power-off) less than 500ms. Using autosuspend with
delay set as 1000 violates this requirement.
Use put_sync_suspend in unprepare to meet the spec. For other cases (such
as getting EDID), it still uses autosuspend.
Suggested-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Fixes: 3235b0f20a0a ("drm/panel: panel-simple: Use runtime pm to avoid excessive unprepare / prepare")
Signed-off-by: Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx>
Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20231220221418.2610185-1-hsinyi@xxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index cba5a93e60822..70feee7876114 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -413,8 +413,7 @@ static int panel_edp_unprepare(struct drm_panel *panel)
if (!p->prepared)
return 0;
- pm_runtime_mark_last_busy(panel->dev);
- ret = pm_runtime_put_autosuspend(panel->dev);
+ ret = pm_runtime_put_sync_suspend(panel->dev);
if (ret < 0)
return ret;
p->prepared = false;
