Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9331
-gerrit
commit 72fa8545fef467eca98c87f25c4d8ee51bdc486c Author: Timothy Pearson tpearson@raptorengineeringinc.com Date: Mon Apr 6 22:02:18 2015 -0500
mainboard/lenovo/t400: Increase backlight frequency to reduce flicker
TEST: Booted Lenovo T400 with LED backlight and verified the absence of any visible flicker along with proper operation of the brightness control.
Change-Id: Ifb485f4aad385aac794978527fd7d246f444ea08 Signed-off-by: Timothy Pearson tpearson@raptorengineeringinc.com --- src/mainboard/lenovo/t400/devicetree.cb | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/src/mainboard/lenovo/t400/devicetree.cb b/src/mainboard/lenovo/t400/devicetree.cb index af92d30..9f3a544 100644 --- a/src/mainboard/lenovo/t400/devicetree.cb +++ b/src/mainboard/lenovo/t400/devicetree.cb @@ -6,6 +6,8 @@ chip northbridge/intel/gm45 register "gfx.use_spread_spectrum_clock" = "1" register "gfx.link_frequency_270_mhz" = "1"
+ register "gfx.backlight" = "0x620062" + device cpu_cluster 0 on chip cpu/intel/socket_BGA956 device lapic 0 on end