sm7125-common: Add UdfpsHandler for NightDisplay and ExtraDim

*Optical fingerprint sensors don't like NightDisplay and ExtraDim since those decrease overall sensor accuracy
*Turn ExtraDim off and set NightDisplay's color temperature to AOSP's default white balance value if the fingerprint sensor is touched

Change-Id: I6651cd5c8c066102feebfb764184b099c6ad741d

common.mk

@@ -179,7 +179,8 @@ PRODUCT_PACKAGES += \
 
 # Fingerprint
 PRODUCT_PACKAGES += \
-    android.hardware.biometrics.fingerprint@2.3-service-samsung.sm7125
+    android.hardware.biometrics.fingerprint@2.3-service-samsung.sm7125 \
+    SamsungUdfpsHandler.sm7125
 
 # fastbootd
 PRODUCT_PACKAGES += \

fingerprint/Android.mk

@@ -28,6 +28,7 @@ LOCAL_SHARED_LIBRARIES := \
     libhidlbase \
     liblog \
     libutils \
+    libcutils \
     android.hardware.biometrics.fingerprint@2.1 \
     android.hardware.biometrics.fingerprint@2.2 \
     android.hardware.biometrics.fingerprint@2.3

fingerprint/BiometricsFingerprint.cpp

@@ -27,6 +27,7 @@
 #include <fstream>
 #include <inttypes.h>
 #include <unistd.h>
+#include <cutils/properties.h>
 
 #ifdef HAS_FINGERPRINT_GESTURES
 #include <fcntl.h>
@@ -125,6 +126,8 @@ Return<bool> BiometricsFingerprint::isUdfps(uint32_t) {
 }
 
 Return<void> BiometricsFingerprint::onFingerDown(uint32_t, uint32_t, float, float) {
+    property_set("vendor.finger.down", "1");
+
     std::thread([this]() {
         std::this_thread::sleep_for(std::chrono::milliseconds(35));
         set(HBM_PATH, "331");

udfps/Android.mk

@@ -0,0 +1,20 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+LOCAL_PACKAGE_NAME := SamsungUdfpsHandler.sm7125
+LOCAL_CERTIFICATE := platform
+LOCAL_PRIVATE_PLATFORM_APIS := true
+LOCAL_PRIVILEGED_MODULE := true
+
+LOCAL_USE_AAPT2 := true
+
+ifneq ($(INCREMENTAL_BUILDS),)
+    LOCAL_PROGUARD_ENABLED := disabled
+    LOCAL_JACK_ENABLED := incremental
+endif
+
+include $(BUILD_PACKAGE)

udfps/AndroidManifest.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="android.hardware.display"
+    android:versionCode="1"
+    android:versionName="1.0"
+    android:sharedUserId="android.uid.system">
+
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+
+    <uses-sdk
+        android:targetSdkVersion="28"/>
+
+    <application
+        android:label="SamsungUdfpsHandler"
+        android:persistent="true">
+
+        <receiver android:name=".BootCompletedReceiver">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </receiver>
+
+        <service android:name=".SamsungUdfpsHandlerService"
+                 android:permission="SamsungUdfpsHandlerService">
+        </service>
+    </application>
+</manifest>

udfps/src/android/hardware/display/BootCompletedReceiver.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2022 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.display;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.util.Log;
+
+public class BootCompletedReceiver extends BroadcastReceiver {
+
+    private static final boolean DEBUG = false;
+    private static final String TAG = "SamsungUdfpsHandler";
+
+    @Override
+    public void onReceive(final Context context, Intent intent) {
+        if (DEBUG) Log.d(TAG, "Received boot completed intent");
+        Utils.startService(context);
+    }
+}

udfps/src/android/hardware/display/SamsungUdfpsHandlerService.java

@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2022 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.display;
+
+import android.app.Service;
+import android.content.Intent;
+import android.hardware.display.ColorDisplayManager;
+import android.os.SystemProperties;
+import android.os.IBinder;
+import android.util.Log;
+import android.os.Handler;
+
+public class SamsungUdfpsHandlerService extends Service {
+    private static final String TAG = "SamsungUdfpsHandler";
+    private static final boolean DEBUG = false;
+
+    private int mNightDisplayTemp = 0;
+    private boolean mExtraDimActive = false;
+
+    private ColorDisplayManager mColorDisplayManager;
+    private Handler mHandler;
+    private static Runnable mRunnable;
+
+    private void disable() {
+        if (DEBUG) Log.d(TAG, "Finger down, set NightDisplay and ExtraDim off");
+
+        mNightDisplayTemp = mColorDisplayManager.getNightDisplayColorTemperature();
+
+        if (mColorDisplayManager.isNightDisplayActivated()) {
+            // 6500 Kelvin is AOSP's default white balance value
+            mColorDisplayManager.setNightDisplayColorTemperature(6500);
+        }
+
+        if (mColorDisplayManager.isReduceBrightColorsActivated()) {
+            mExtraDimActive = true;
+            mColorDisplayManager.setReduceBrightColorsActivated(false);
+        }
+
+        SystemProperties.set("vendor.finger.down", "0");
+    }
+
+    private void enable() {
+        if (DEBUG) Log.d(TAG, "Finger up, reset NightDisplay and ExtraDim to previous state");
+
+        SystemProperties.set("vendor.finger.down", "-1");
+
+        mColorDisplayManager.setNightDisplayColorTemperature(mNightDisplayTemp);
+        mColorDisplayManager.setReduceBrightColorsActivated(mExtraDimActive);
+
+        mExtraDimActive = false;
+    }
+
+    @Override
+    public void onCreate() {
+        if (DEBUG) Log.d(TAG, "SamsungUdfpsHandler Started");
+        mColorDisplayManager = getSystemService(ColorDisplayManager.class);
+
+        SystemProperties.set("vendor.finger.down", "-1");
+
+        mHandler = new Handler();
+        mRunnable = new Runnable() {
+            public void run() {
+                if (DEBUG) Log.d(TAG, "onCreate: " + TAG + " is running");
+
+                if (SystemProperties.get("vendor.finger.down").equals("1")) {
+                    disable();
+                    try {
+                        Thread.sleep(2000);
+                    }
+                    catch (InterruptedException e) {
+                        e.printStackTrace();
+                    }
+                } else if (SystemProperties.get("vendor.finger.down").equals("0")) {
+                    enable();
+                }
+                mHandler.postDelayed(mRunnable, 100);
+            }
+        };
+
+        mHandler.postDelayed(mRunnable, 0);
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        if (DEBUG) Log.d(TAG, "Starting service");
+        return START_STICKY;
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+}

udfps/src/android/hardware/display/Utils.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2022 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.display;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.UserHandle;
+import android.util.Log;
+
+public final class Utils {
+
+    private static final String TAG = "UDFPSUtils";
+    private static final boolean DEBUG = false;
+
+    protected static void startService(Context context) {
+        if (DEBUG) Log.d(TAG, "Starting service");
+        context.startServiceAsUser(new Intent(context, SamsungUdfpsHandlerService.class),
+                UserHandle.CURRENT);
+    }
+
+    protected static void stopService(Context context) {
+        if (DEBUG) Log.d(TAG, "Stopping service");
+        context.stopServiceAsUser(new Intent(context, SamsungUdfpsHandlerService.class),
+                UserHandle.CURRENT);
+    }
+}