From 162369b604ecb9eccf2b8157aaeb4279fcdf26d4 Mon Sep 17 00:00:00 2001
From: Talmid of Levi <talmid-lv@mezimmah.net>
Date: Mon, 4 Dec 2023 10:54:44 -0500
Subject: [PATCH] backlight

---
 patches/button_backlight.patch | 61 ++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 patches/button_backlight.patch

diff --git a/patches/button_backlight.patch b/patches/button_backlight.patch
new file mode 100644
index 0000000..a4f1f73
--- /dev/null
+++ b/patches/button_backlight.patch
@@ -0,0 +1,61 @@
+diff --git a/services/core/java/com/android/server/display/DisplayPowerController.java b/services/core/java/com/android/server/display/DisplayPowerController.java
+index 7c0f4197363..16758ba496e 100644
+--- a/services/core/java/com/android/server/display/DisplayPowerController.java
++++ b/services/core/java/com/android/server/display/DisplayPowerController.java
+@@ -63,7 +63,12 @@ import com.android.server.display.whitebalance.DisplayWhiteBalanceFactory;
+ import com.android.server.display.whitebalance.DisplayWhiteBalanceSettings;
+ import com.android.server.policy.WindowManagerPolicy;
+ 
++import java.io.BufferedWriter;
++import java.io.File;
++import java.io.FileWriter;
++import java.io.IOException;
+ import java.io.PrintWriter;
++import java.io.Writer;
+ import java.util.List;
+ 
+ /**
+@@ -561,6 +566,18 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
+         mDisplayWhiteBalanceController = displayWhiteBalanceController;
+     }
+ 
++    private void changeKeyboardBacklightState(String value) {
++        try {
++          File outputFile = new File("/sys/class/leds/keyboard_light/", "brightness");
++          Writer writer = new BufferedWriter(new FileWriter(outputFile));
++
++          writer.write(value);
++          writer.close();
++        } catch (IOException e) {
++          Slog.d("NEHEMIAH", "Sorry, failed to change the value of the keyboard backlight");
++        }
++    }
++
+     private Sensor findDisplayLightSensor(String sensorType) {
+         if (!TextUtils.isEmpty(sensorType)) {
+             List<Sensor> sensors = mSensorManager.getSensorList(Sensor.TYPE_ALL);
+@@ -1154,6 +1171,7 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
+                 && mReportedScreenStateToPolicy == REPORTED_TO_POLICY_SCREEN_TURNING_ON) {
+             setReportedScreenState(REPORTED_TO_POLICY_SCREEN_ON);
+             mWindowManagerPolicy.screenTurnedOn();
++            changeKeyboardBacklightState("255");
+         }
+ 
+         // Grab a wake lock if we have unfinished business.
+@@ -1310,6 +1328,7 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
+             setReportedScreenState(REPORTED_TO_POLICY_SCREEN_OFF);
+             unblockScreenOn();
+             mWindowManagerPolicy.screenTurnedOff();
++            changeKeyboardBacklightState("0");
+         } else if (!isOff
+                 && mReportedScreenStateToPolicy == REPORTED_TO_POLICY_SCREEN_TURNING_OFF) {
+ 
+@@ -1317,6 +1336,7 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
+             // Complete the full state transition on -> turningOff -> off.
+             unblockScreenOff();
+             mWindowManagerPolicy.screenTurnedOff();
++            changeKeyboardBacklightState("0");
+             setReportedScreenState(REPORTED_TO_POLICY_SCREEN_OFF);
+         }
+         if (!isOff && mReportedScreenStateToPolicy == REPORTED_TO_POLICY_SCREEN_OFF) {
+