From: Hsin-Yi Wang hsinyi@chromium.org
[ 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-hsiny... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/panel/panel-edp.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
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;