6.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhengqiao Xia <xiazhengqiao@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
[ Upstream commit e635b7eb7062b464bbd9795308b1a80eac0b01f5 ]
For MNC207QS1-1 panel, Splash screen occur when switch from VT1 to VT2.
The BL_EN signal does not conform to the VESA protocol.
BL_EN signal needs to be pulled high after video signal.
So add prepare_to_enable to 200ms.
[ dianders: Adjusted subject prefix and added Fixes tag ]
Fixes: 0547692ac146 ("drm/panel-edp: Add several generic edp panels")
Signed-off-by: Zhengqiao Xia <xiazhengqiao@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240301084006.14422-1-xiazhengqiao@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/panel/panel-edp.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index d58f90bc48fba..745f3e48f02ac 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -1865,6 +1865,13 @@ static const struct panel_delay delay_200_500_e50 = {
.enable = 50,
};
+static const struct panel_delay delay_200_500_e50_p2e200 = {
+ .hpd_absent = 200,
+ .unprepare = 500,
+ .enable = 50,
+ .prepare_to_enable = 200,
+};
+
static const struct panel_delay delay_200_500_e80 = {
.hpd_absent = 200,
.unprepare = 500,
@@ -2034,7 +2041,7 @@ static const struct edp_panel_entry edp_panels[] = {
EDP_PANEL_ENTRY('C', 'M', 'N', 0x14d6, &delay_200_500_e80_d50, "N140BGA-EA4"),
EDP_PANEL_ENTRY('C', 'M', 'N', 0x14e5, &delay_200_500_e80_d50, "N140HGA-EA1"),
- EDP_PANEL_ENTRY('C', 'S', 'O', 0x1200, &delay_200_500_e50, "MNC207QS1-1"),
+ EDP_PANEL_ENTRY('C', 'S', 'O', 0x1200, &delay_200_500_e50_p2e200, "MNC207QS1-1"),
EDP_PANEL_ENTRY('H', 'K', 'C', 0x2d51, &delay_200_500_e200, "Unknown"),
EDP_PANEL_ENTRY('H', 'K', 'C', 0x2d5b, &delay_200_500_e200, "Unknown"),
--
2.43.0
