mb/system76: Add custom backlight levels for Intel GMA

Add custom backlight levels for all models except:

- addw1/addw2: Uses an OLED display
- bonw14: Does not use the iGPU

Change-Id: Ibea37f19acca0d718211fc41706019a92a240c70
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61301
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jeremy Soller <jeremy@system76.com>

Author: crawfxrd

src/mainboard/system76/cml-u/acpi/backlight.asl

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <drivers/intel/gma/acpi/gma.asl>
+
+Scope (GFX0)
+{
+	Name (BRIG, Package (22) {
+		40, /* default AC */
+		40, /* default Battery */
+		5,
+		10,
+		15,
+		20,
+		25,
+		30,
+		35,
+		40,
+		45,
+		50,
+		55,
+		60,
+		65,
+		70,
+		75,
+		80,
+		85,
+		90,
+		95,
+		100
+	})
+}

src/mainboard/system76/cml-u/acpi/mainboard.asl

@@ -6,6 +6,9 @@
 
 Scope (\_SB) {
 	#include "sleep.asl"
+	Scope (PCI0) {
+		#include "backlight.asl"
+	}
 }
 
 Scope (\_GPE) {

src/mainboard/system76/cml-u/dsdt.asl

@@ -19,7 +19,6 @@ 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>

src/mainboard/system76/gaze15/acpi/backlight.asl

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <drivers/intel/gma/acpi/gma.asl>
+
+Scope (GFX0)
+{
+	Name (BRIG, Package (22) {
+		40, /* default AC */
+		40, /* default Battery */
+		5,
+		10,
+		15,
+		20,
+		25,
+		30,
+		35,
+		40,
+		45,
+		50,
+		55,
+		60,
+		65,
+		70,
+		75,
+		80,
+		85,
+		90,
+		95,
+		100
+	})
+}

src/mainboard/system76/gaze15/acpi/mainboard.asl

@@ -6,6 +6,9 @@
 
 Scope (\_SB) {
 	#include "sleep.asl"
+	Scope (PCI0) {
+		#include "backlight.asl"
+	}
 }
 
 Scope (\_GPE) {

src/mainboard/system76/gaze15/dsdt.asl

@@ -18,7 +18,6 @@ DefinitionBlock(
 	Device (\_SB.PCI0) {
 		#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>

src/mainboard/system76/kbl-u/acpi/backlight.asl

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <drivers/intel/gma/acpi/gma.asl>
+
+Scope (GFX0)
+{
+	Name (BRIG, Package (22) {
+		40, /* default AC */
+		40, /* default Battery */
+		5,
+		10,
+		15,
+		20,
+		25,
+		30,
+		35,
+		40,
+		45,
+		50,
+		55,
+		60,
+		65,
+		70,
+		75,
+		80,
+		85,
+		90,
+		95,
+		100
+	})
+}

src/mainboard/system76/kbl-u/acpi/mainboard.asl

@@ -1,6 +1,10 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 Scope (\_SB) {
+	Scope (PCI0) {
+		#include "backlight.asl"
+	}
+
 	#include "ac.asl"
 	#include "battery.asl"
 	#include "buttons.asl"

src/mainboard/system76/oryp5/acpi/backlight.asl

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <drivers/intel/gma/acpi/gma.asl>
+
+Scope (GFX0)
+{
+	Name (BRIG, Package (22) {
+		40, /* default AC */
+		40, /* default Battery */
+		5,
+		10,
+		15,
+		20,
+		25,
+		30,
+		35,
+		40,
+		45,
+		50,
+		55,
+		60,
+		65,
+		70,
+		75,
+		80,
+		85,
+		90,
+		95,
+		100
+	})
+}

src/mainboard/system76/oryp5/acpi/mainboard.asl

@@ -7,6 +7,9 @@
 Scope (\_SB)
 {
 	#include "sleep.asl"
+	Scope (PCI0) {
+		#include "backlight.asl"
+	}
 }
 
 Scope (\_GPE)