From ac08c818369b8dcd21e7529ac50aebe5f4c4608a Mon Sep 17 00:00:00 2001
From: Benjamin Doron <benjamin.doron00@gmail.com>
Date: Sat, 4 Apr 2020 05:58:54 +0000
Subject: [PATCH] mb/purism/librem_skl: Use ACPI backlight controls

Enables ACPI backlight controls.

Change-Id: Iccf50f427b7555ee1a3ef9cc11a89d532789ac54
Signed-off-by: Benjamin Doron <benjamin.doron00@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40145
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Wim Vervoorn <wvervoorn@eltan.com>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
---
 src/mainboard/purism/librem_skl/dsdt.asl                       | 1 +
 .../purism/librem_skl/variants/librem13v2/devicetree.cb        | 3 +++
 .../purism/librem_skl/variants/librem15v3/devicetree.cb        | 3 +++
 3 files changed, 7 insertions(+)

diff --git a/src/mainboard/purism/librem_skl/dsdt.asl b/src/mainboard/purism/librem_skl/dsdt.asl
index 687de930d0..5ef19e12f6 100644
--- a/src/mainboard/purism/librem_skl/dsdt.asl
+++ b/src/mainboard/purism/librem_skl/dsdt.asl
@@ -24,6 +24,7 @@ DefinitionBlock(
 		{
 			#include <soc/intel/skylake/acpi/systemagent.asl>
 			#include <soc/intel/skylake/acpi/pch.asl>
+			#include <drivers/intel/gma/acpi/default_brightness_levels.asl>
 		}
 
 	}
diff --git a/src/mainboard/purism/librem_skl/variants/librem13v2/devicetree.cb b/src/mainboard/purism/librem_skl/variants/librem13v2/devicetree.cb
index f69c4822bb..6c55af66cc 100644
--- a/src/mainboard/purism/librem_skl/variants/librem13v2/devicetree.cb
+++ b/src/mainboard/purism/librem_skl/variants/librem13v2/devicetree.cb
@@ -8,6 +8,9 @@ chip soc/intel/skylake
 
 	register "gpu_pch_backlight_pwm_hz"	  = "200"
 
+	# IGD Displays
+	register "gfx" = "GMA_STATIC_DISPLAYS(0)"
+
 	register "deep_s3_enable_ac" = "0"
 	register "deep_s3_enable_dc" = "0"
 	register "deep_s5_enable_ac" = "0"
diff --git a/src/mainboard/purism/librem_skl/variants/librem15v3/devicetree.cb b/src/mainboard/purism/librem_skl/variants/librem15v3/devicetree.cb
index f5b8b99885..f48135297e 100644
--- a/src/mainboard/purism/librem_skl/variants/librem15v3/devicetree.cb
+++ b/src/mainboard/purism/librem_skl/variants/librem15v3/devicetree.cb
@@ -8,6 +8,9 @@ chip soc/intel/skylake
 
 	register "gpu_pch_backlight_pwm_hz"	  = "200"
 
+	# IGD Displays
+	register "gfx" = "GMA_STATIC_DISPLAYS(0)"
+
 	register "deep_s3_enable_ac" = "0"
 	register "deep_s3_enable_dc" = "0"
 	register "deep_s5_enable_ac" = "0"