This is a note to let you know that I've just added the patch titled
drm/bridge: anx7625: Drop EDID cache on bridge power off
to the 5.15-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-bridge-anx7625-drop-edid-cache-on-bridge-power-o.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ad75908e8628095cc3273038a2381c49c5414fc0
Author: Pin-yen Lin <treapking@xxxxxxxxxxxx>
Date: Thu Sep 26 17:29:08 2024 +0800
drm/bridge: anx7625: Drop EDID cache on bridge power off
[ Upstream commit 00ae002116a14c2e6a342c4c9ae080cdbb9b4b21 ]
The bridge might miss the display change events when it's powered off.
This happens when a user changes the external monitor when the system
is suspended and the embedded controller doesn't not wake AP up.
It's also observed that one DP-to-HDMI bridge doesn't work correctly
when there is no EDID read after it is powered on.
Drop the cache to force an EDID read after system resume to fix this.
Fixes: 8bdfc5dae4e3 ("drm/bridge: anx7625: Add anx7625 MIPI DSI/DPI to DP")
Signed-off-by: Pin-yen Lin <treapking@xxxxxxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240926092931.3870342-2-treapking@xxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index f895ef1939fa0..01612d2c034af 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -1704,6 +1704,8 @@ static int __maybe_unused anx7625_runtime_pm_suspend(struct device *dev)
mutex_lock(&ctx->lock);
anx7625_stop_dp_work(ctx);
+ if (!ctx->pdata.panel_bridge)
+ anx7625_remove_edid(ctx);
anx7625_power_standby(ctx);
mutex_unlock(&ctx->lock);
