mb/siemens/mc_ehl3/lcd_panel.c: Set LVDS re-power delay to 1 s

The currently used panel type could work with 500 ms but increasing
the value to 1 second allows to use a wider range of LVDS LCD panels,
as many of them specify the delay of 1 s as minimum.

BUG=none
TEST=Test link stability using a panel with minimum re-power delay of
1 s.

Change-Id: I2dd86e791c1212b67a80d7e6cfc474ad91b26c6b
Signed-off-by: Jan Samek <jan.samek@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72804
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
---
M src/mainboard/siemens/mc_ehl/variants/mc_ehl3/lcd_panel.c
1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/src/mainboard/siemens/mc_ehl/variants/mc_ehl3/lcd_panel.c b/src/mainboard/siemens/mc_ehl/variants/mc_ehl3/lcd_panel.c
index 316eb71..965f62d 100644
--- a/src/mainboard/siemens/mc_ehl/variants/mc_ehl3/lcd_panel.c
+++ b/src/mainboard/siemens/mc_ehl/variants/mc_ehl3/lcd_panel.c
@@ -82,8 +82,8 @@
 	cfg->t2_delay = 0x01;
 	/* LVDS to backlight active delay: 200 ms */
 	cfg->t3_timing = 0x04;
-	/* Minimum re-power delay: 500 ms */
-	cfg->t12_timing = 0x0a;
+	/* Minimum re-power delay: 1 s */
+	cfg->t12_timing = 0x14;
 	/* Backlight off to LVDS inactive delay: 200 ms */
 	cfg->t4_timing = 0x04;
 	/* Enable LVDS to VDD inactive delay. */

