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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>
Reviewed-on: http://review.coreboot.org/9491
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Duncan Laurie 2015-01-14 17:36:08 -08:00 committed by Stefan Reinauer
parent f3e0a13f70
commit a5c417ecd8
1 changed files with 1 additions and 1 deletions
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2
src/mainboard/google/samus/devicetree.cb
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@ -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