diff --git a/src/mainboard/google/volteer/dsdt.asl b/src/mainboard/google/volteer/dsdt.asl
index 4193d3d1e7..eeaf61379f 100644
--- a/src/mainboard/google/volteer/dsdt.asl
+++ b/src/mainboard/google/volteer/dsdt.asl
@@ -28,6 +28,7 @@ DefinitionBlock(
 			#include <soc/intel/common/block/acpi/acpi/northbridge.asl>
 			#include <soc/intel/tigerlake/acpi/southbridge.asl>
 			#include <soc/intel/tigerlake/acpi/tcss.asl>
+			#include <drivers/intel/gma/acpi/default_brightness_levels.asl>
 #if CONFIG(VARIANT_HAS_MIPI_CAMERA)
 			#include <soc/intel/common/block/acpi/acpi/ipu.asl>
 #endif
diff --git a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
index 4af59e6ff1..078deb29f2 100644
--- a/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/volteer/variants/baseboard/devicetree.cb
@@ -357,7 +357,9 @@ chip soc/intel/tigerlake
 	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