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From 770021ce66a0fddebb9639c4df0696ecfca45488 Mon Sep 17 00:00:00 2001
From: Leah Rowe <info@minifree.org>
Date: Mon, 15 Jun 2015 19:59:46 +0100
Subject: [PATCH 4/9] lenovo/t60: Enable brightness controls (native graphics)
This makes the Fn Home/End keys work for controlling the
brightness of the display. Value obtained by reading
BLC_PWM_CTL when running the VBIOS (option ROM).
On i945 legacy brightness control is enabled by a single
bit in BLC_PWM_CTL. It's bit 16 or bit 0 (the other one
reverses polarity). Set the bit to enable brightness
controls.
Change-Id: I22e261f2ce28ec81cd208a73e6311ec67146eb72
Signed-off-by: Leah Rowe <info@minifree.org>
---
src/mainboard/lenovo/t60/devicetree.cb | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/mainboard/lenovo/t60/devicetree.cb b/src/mainboard/lenovo/t60/devicetree.cb
index b28f1ad..9e6ce02 100644
--- a/src/mainboard/lenovo/t60/devicetree.cb
+++ b/src/mainboard/lenovo/t60/devicetree.cb
@@ -26,7 +26,7 @@ chip northbridge/intel/i945
register "gpu_hotplug" = "0x00000220"
register "gpu_lvds_use_spread_spectrum_clock" = "1"
- register "gpu_backlight" = "0x1280128"
+ register "gpu_backlight" = "0x58BF58BE"
device cpu_cluster 0 on
chip cpu/intel/socket_mFCPGA478
--
1.9.1
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