Francis Rowe (info@gluglug.org.uk) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/10552
-gerrit
commit 2f4efb3e9f693f281655327820ebebc016f81e5c Author: Francis Rowe info@gluglug.org.uk Date: Mon Jun 15 19:59:46 2015 +0100
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: Francis Rowe info@gluglug.org.uk --- 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