This is a note to let you know that I've just added the patch titled
drm/panel-elida-kd35t133: hold panel in reset for unprepare
to the 6.1-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-elida-kd35t133-hold-panel-in-reset-for-unp.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c26d90e0cbbb5bcb96ce7f82e04b43e3e23bb8a0
Author: Chris Morgan <macromorgan@xxxxxxxxxxx>
Date: Fri Nov 17 13:44:02 2023 -0600
drm/panel-elida-kd35t133: hold panel in reset for unprepare
[ Upstream commit 03c5b2a5f6c39fe4e090346536cf1c14ee18b61e ]
For devices like the Anbernic RG351M and RG351P the panel is wired to
an always on regulator. When the device suspends and wakes up, there
are some slight artifacts on the screen that go away over time. If
instead we hold the panel in reset status after it is unprepared,
this does not happen.
Fixes: 5b6603360c12 ("drm/panel: add panel driver for Elida KD35T133 panels")
Signed-off-by: Chris Morgan <macromorgan@xxxxxxxxxxx>
Reviewed-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231117194405.1386265-3-macroalpha82@xxxxxxxxx
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20231117194405.1386265-3-macroalpha82@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/panel/panel-elida-kd35t133.c b/drivers/gpu/drm/panel/panel-elida-kd35t133.c
index eee714cf3f49..3a7fc3ca6a6f 100644
--- a/drivers/gpu/drm/panel/panel-elida-kd35t133.c
+++ b/drivers/gpu/drm/panel/panel-elida-kd35t133.c
@@ -112,6 +112,8 @@ static int kd35t133_unprepare(struct drm_panel *panel)
return ret;
}
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+
regulator_disable(ctx->iovcc);
regulator_disable(ctx->vdd);
