siemens/mc_tcu3: Increase LCD backlight turn-on delay to 500 ms
Due to different LCD panel requirements the delay between LVDS becomes
active and the backlight is switched on needs to be increased to 500 ms.
Change-Id: I09029624469aef412141c7b46224d48557ba4af1
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/16875
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/src/mainboard/siemens/mc_tcu3/ptn3460.c b/src/mainboard/siemens/mc_tcu3/ptn3460.c
index 21847bd..bcf8d2c 100644
--- a/src/mainboard/siemens/mc_tcu3/ptn3460.c
+++ b/src/mainboard/siemens/mc_tcu3/ptn3460.c
@@ -80,7 +80,7 @@
cfg.lvds_interface_ctrl2 = 0x03; /* no clock spreading, 300 mV LVDS swing */
cfg.lvds_interface_ctrl3 = 0x00; /* no LVDS signal swap */
cfg.t2_delay = 1; /* Delay T2 (VDD to LVDS active) by 16 ms */
- cfg.t3_timing = 5; /* 250 ms from LVDS to backlight active */
+ cfg.t3_timing = 10; /* 500 ms from LVDS to backlight active */
cfg.t12_timing = 20; /* 1 second re-power delay */
cfg.t4_timing = 3; /* 150 ms backlight off to LVDS inactive */
cfg.t5_delay = 1; /* Delay T5 (LVDS to VDD inactive) by 16 ms */