From 0f11811ab7e5e88d1df24b9cc05f7fddcebbe679 Mon Sep 17 00:00:00 2001
From: Jeremy Soller <jeremy@system76.com>
Date: Sat, 9 May 2020 12:37:26 -0600
Subject: [PATCH] mainboard/system76/lemp9: add GMA backlight control

---
 src/mainboard/system76/lemp9/devicetree.cb | 4 ++++
 src/mainboard/system76/lemp9/dsdt.asl      | 1 +
 2 files changed, 5 insertions(+)

diff --git a/src/mainboard/system76/lemp9/devicetree.cb b/src/mainboard/system76/lemp9/devicetree.cb
index bd6956b40f..bb885486b4 100644
--- a/src/mainboard/system76/lemp9/devicetree.cb
+++ b/src/mainboard/system76/lemp9/devicetree.cb
@@ -167,6 +167,10 @@ chip soc/intel/cannonlake
 	# Serial IRQ Continuous
 	register "SerialIrqConfigSirqMode" = "1"
 
+# Graphics (soc/intel/cannonlake/graphics.c)
+	# IGD Displays
+    register "gfx" = "GMA_STATIC_DISPLAYS(0)"
+
 # LPC (soc/intel/cannonlake/lpc.c)
 	# LPC configuration from lspci -s 1f.0 -xxx
 	# Address 0x84: Decode 0x80 - 0x8F (Port 80)
diff --git a/src/mainboard/system76/lemp9/dsdt.asl b/src/mainboard/system76/lemp9/dsdt.asl
index 75a98885ed..f2cf15461f 100644
--- a/src/mainboard/system76/lemp9/dsdt.asl
+++ b/src/mainboard/system76/lemp9/dsdt.asl
@@ -33,6 +33,7 @@ DefinitionBlock(
 	{
 		#include <soc/intel/common/block/acpi/acpi/northbridge.asl>
 		#include <soc/intel/cannonlake/acpi/southbridge.asl>
+		#include <drivers/intel/gma/acpi/default_brightness_levels.asl>
 	}
 
 	#include <southbridge/intel/common/acpi/sleepstates.asl>