Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9491
-gerrit
commit 1bd41d6ace54d744b4ccdf1716406a9815285c20 Author: Duncan Laurie dlaurie@chromium.org Date: Wed Jan 14 17:36:08 2015 -0800
samus: Set current backlight PWM value
With recent changes in the 3.14 kernel and the switch to not using X the panel backlight is not geting turned on until chrome is started which means the splash screen is not visible.
If we set the backlight PWM in coreboot then it will at least turn on for the early boot process.
BUG=chrome-os-partner:31549 BRANCH=samus TEST=boot on samus in normal mode and see the boot splash logo
Change-Id: I81e6b90617acb181b4de3365f8f56ec3b846b78b Signed-off-by: Stefan Reinauer reinauer@chromium.org Original-Commit-Id: f850fe3faff268a64f18e6bd176ec1126b921e3b Original-Change-Id: I622bef8af9bb6b753fe228b33ecdc4aae76af131 Original-Signed-off-by: Duncan Laurie dlaurie@chromium.org Original-Reviewed-on: https://chromium-review.googlesource.com/240853 Original-Reviewed-by: Shawn N shawnn@chromium.org --- src/mainboard/google/samus/devicetree.cb | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/mainboard/google/samus/devicetree.cb b/src/mainboard/google/samus/devicetree.cb index 26b7b41..0ca7405 100644 --- a/src/mainboard/google/samus/devicetree.cb +++ b/src/mainboard/google/samus/devicetree.cb @@ -11,7 +11,7 @@ chip soc/intel/broadwell
# Set backlight PWM values for eDP register "gpu_cpu_backlight" = "0x00000200" - register "gpu_pch_backlight" = "0x04000000" + register "gpu_pch_backlight" = "0x04000200"
# Enable Panel and configure power delays register "gpu_panel_port_select" = "1" # eDP