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drm/panel-edp: use put_sync in unprepare

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[ 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@chromium.org>
Fixes: 3235b0f20a0a ("drm/panel: panel-simple: Use runtime pm to avoid excessive unprepare / prepare")
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231220221418.2610185-1-hsinyi@chromium.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hsin-Yi Wang 2023-12-20 14:13:11 -08:00 committed by Sasha Levin
parent b241ee1e49
commit c5e834cf86
1 changed files with 1 additions and 2 deletions
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3
drivers/gpu/drm/panel/panel-edp.c
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@ -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;