This is a note to let you know that I've just added the patch titled
drm/panel: st7701: Add prepare_prev_first flag to drm_panel
to the 6.12-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-st7701-add-prepare_prev_first-flag-to-drm_.patch
and it can be found in the queue-6.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 075953e2fe55a6f66fb83d175e16ea09dc6717be
Author: Marek Vasut <marex@xxxxxxx>
Date: Sun Nov 24 23:48:07 2024 +0100
drm/panel: st7701: Add prepare_prev_first flag to drm_panel
[ Upstream commit 406dd4c7984a457567ca652455d5efad81983f02 ]
The DSI host must be enabled for the panel to be initialized in
prepare(). Set the prepare_prev_first flag to guarantee this.
This fixes the panel operation on NXP i.MX8MP SoC / Samsung DSIM
DSI host.
Fixes: 849b2e3ff969 ("drm/panel: Add Sitronix ST7701 panel driver")
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Reviewed-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20241124224812.150263-1-marex@xxxxxxx
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20241124224812.150263-1-marex@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7701.c b/drivers/gpu/drm/panel/panel-sitronix-st7701.c
index eef03d04e0cd..1f72ef7ca74c 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7701.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7701.c
@@ -1177,6 +1177,7 @@ static int st7701_probe(struct device *dev, int connector_type)
return dev_err_probe(dev, ret, "Failed to get orientation\n");
drm_panel_init(&st7701->panel, dev, &st7701_funcs, connector_type);
+ st7701->panel.prepare_prev_first = true;
/**
* Once sleep out has been issued, ST7701 IC required to wait 120ms
