From 3cbe62fe3700f11bc820171b8efda1ee4954c198 Mon Sep 17 00:00:00 2001
From: Nico Huber <nico.h@gmx.de>
Date: Sat, 9 Jan 2016 23:33:30 +0100
Subject: mb/lenovo/x200: Add panel power sequence values
Values are taken from the vendor BIOS of my X200s. Notable effect:
Stops display from flashing during native graphics init / Linux mode
setting.
Change-Id: Ie5d9efc010a78dd46317b6bbdb7bfacc2c9d2cbf
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/12886
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
---
src/mainboard/lenovo/x200/devicetree.cb | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/src/mainboard/lenovo/x200/devicetree.cb b/src/mainboard/lenovo/x200/devicetree.cb
index 36a1939369..92c41d73d9 100644
--- a/src/mainboard/lenovo/x200/devicetree.cb
+++ b/src/mainboard/lenovo/x200/devicetree.cb
@@ -3,6 +3,11 @@ chip northbridge/intel/gm45
register "gfx.ndid" = "3"
register "gfx.did" = "{ 0x80000100, 0x80000240, 0x80000410, 0x80000410, 0x00000005 }"
+ register "gpu_panel_power_up_delay" = "250" # T1+T2: 25ms
+ register "gpu_panel_power_down_delay" = "250" # T3: 25ms
+ register "gpu_panel_power_backlight_on_delay" = "2500" # T5: 250ms
+ register "gpu_panel_power_backlight_off_delay" = "2500" # Tx: 250ms
+ register "gpu_panel_power_cycle_delay" = "3" # T4: 200ms
register "gfx.use_spread_spectrum_clock" = "1"
register "gfx.link_frequency_270_mhz" = "1"
--
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