broadwell: Turn off panel backlight in S5 SMI handler
In order for some panels to meet spec when the system is put
into S5 by way of power button during firmware (i.e. not by
the OS) then it needs to turn off the backlight and give it
time to turn off before going into S5.
If the OS properly sequences the panel down then the backlight
enable bit will not be set in this step and nothing will happen.
BUG=chrome-os-partner:33994
BRANCH=broadwell
TEST=build and boot on samus
Change-Id: Ic86f388218f889b1fe690cc1bfc5c3e233e95115
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Original-Commit-Id: e3c9c131a87bae380e1fd3f96c9ad780441add56
Original-Change-Id: I43c5aee8e32768fc9e82790c9f7ceda0ed17ed13
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/240852
Original-Reviewed-by: Shawn N <shawnn@chromium.org>
Reviewed-on: http://review.coreboot.org/9490
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed