41 lines
1.3 KiB
Diff
41 lines
1.3 KiB
Diff
From 9fb5bef8ed96e433c9a9282f0c64e84bd8f5f206 Mon Sep 17 00:00:00 2001
|
|
From: Ondrej Jirman <megous@megous.com>
|
|
Date: Tue, 23 Nov 2021 18:45:28 +0100
|
|
Subject: [PATCH 476/478] drm: panel: st7703: Fix power off sequence
|
|
|
|
After issuing SLEEP IN, it's necessary to let the controller complete
|
|
the blanking sequence and drain the charge from the panel. (According
|
|
to the datasheet.)
|
|
|
|
Signed-off-by: Ondrej Jirman <megous@megous.com>
|
|
---
|
|
drivers/gpu/drm/panel/panel-sitronix-st7703.c | 5 ++++-
|
|
1 file changed, 4 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
|
|
index b463e4c5f238..af5f91ab997b 100644
|
|
--- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c
|
|
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
|
|
@@ -378,7 +378,7 @@ static int st7703_enable(struct drm_panel *panel)
|
|
return ret;
|
|
}
|
|
|
|
- /* Dsiplay on can be issued 120 msec after sleep out */
|
|
+ /* Display on can be issued 120 msec after sleep out */
|
|
msleep(120);
|
|
|
|
ret = mipi_dsi_dcs_set_display_on(dsi);
|
|
@@ -404,6 +404,9 @@ static int st7703_disable(struct drm_panel *panel)
|
|
if (ret < 0)
|
|
dev_err(ctx->dev, "Failed to enter sleep mode: %d\n", ret);
|
|
|
|
+ /* Display needs to be drained of charge, in order to work correctly on next power on. */
|
|
+ msleep(120);
|
|
+
|
|
return 0;
|
|
}
|
|
|
|
--
|
|
2.35.3
|
|
|