mb/google/volteer: Add ACPI display brightness support
Add support for ACPI display brightness controls, so that panel
adjustment is available under Windows.
TEST=build/boot Win11 on google/drobit, verify panel brightness
controls available and functional.
Change-Id: Ic0c026ae09b3fde648db4bdeb4971423953c96a1
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77143
Reviewed-by: Tim Wawrzynczak <inforichland@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
index 4af59e6..078deb2 100644
--- a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
@@ -357,7 +357,9 @@
register "FastPkgCRampDisable" = "1"
device domain 0 on
- device ref igpu on end
+ device ref igpu on
+ register "gfx" = "GMA_DEFAULT_PANEL(0)"
+ end
device ref dptf on
# Default DPTF Policy for all Volteer boards if not overridden
chip drivers/intel/dptf