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android / platform / frameworks / base / 84047bc295af663274ced27def33164d6e020b5d / . / services / java / com / android / server / PowerManagerService.java
blob: 2fb481cbc1335ed6f4a0ddbb4e075929b3466e2d [file] [log] [blame]
/*
* Copyright (C) 2007 The Android Open Source 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 com.android.server;
import com.android.internal.app.IBatteryStats;
import com.android.internal.app.ShutdownThread;
import com.android.server.am.BatteryStatsService;
import android.app.ActivityManagerNative;
import android.app.IActivityManager;
import android.content.BroadcastReceiver;
import android.content.ContentQueryMap;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.database.ContentObserver;
import android.database.Cursor;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.BatteryStats;
import android.os.Binder;
import android.os.Environment;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.IBinder;
import android.os.IPowerManager;
import android.os.LocalPowerManager;
import android.os.Power;
import android.os.PowerManager;
import android.os.Process;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemClock;
import android.provider.Settings.SettingNotFoundException;
import android.provider.Settings;
import android.util.EventLog;
import android.util.Log;
import android.util.Slog;
import android.view.WindowManagerPolicy;
import static android.provider.Settings.System.DIM_SCREEN;
import static android.provider.Settings.System.SCREEN_BRIGHTNESS;
import static android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE;
import static android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC;
import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
import static android.provider.Settings.System.STAY_ON_WHILE_PLUGGED_IN;
import java.io.FileDescriptor;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Observable;
import java.util.Observer;
class PowerManagerService extends IPowerManager.Stub
implements LocalPowerManager, Watchdog.Monitor {
private static final String TAG = "PowerManagerService";
static final String PARTIAL_NAME = "PowerManagerService";
private static final boolean LOG_PARTIAL_WL = false;
// Indicates whether touch-down cycles should be logged as part of the
// LOG_POWER_SCREEN_STATE log events
private static final boolean LOG_TOUCH_DOWNS = true;
private static final int LOCK_MASK = PowerManager.PARTIAL_WAKE_LOCK
| PowerManager.SCREEN_DIM_WAKE_LOCK
| PowerManager.SCREEN_BRIGHT_WAKE_LOCK
| PowerManager.FULL_WAKE_LOCK
| PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK;
// time since last state: time since last event:
// The short keylight delay comes from secure settings; this is the default.
private static final int SHORT_KEYLIGHT_DELAY_DEFAULT = 6000; // t+6 sec
private static final int MEDIUM_KEYLIGHT_DELAY = 15000; // t+15 sec
private static final int LONG_KEYLIGHT_DELAY = 6000; // t+6 sec
private static final int LONG_DIM_TIME = 7000; // t+N-5 sec
// How long to wait to debounce light sensor changes.
private static final int LIGHT_SENSOR_DELAY = 2000;
// For debouncing the proximity sensor.
private static final int PROXIMITY_SENSOR_DELAY = 1000;
// trigger proximity if distance is less than 5 cm
private static final float PROXIMITY_THRESHOLD = 5.0f;
// Cached secure settings; see updateSettingsValues()
private int mShortKeylightDelay = SHORT_KEYLIGHT_DELAY_DEFAULT;
// flags for setPowerState
private static final int SCREEN_ON_BIT = 0x00000001;
private static final int SCREEN_BRIGHT_BIT = 0x00000002;
private static final int BUTTON_BRIGHT_BIT = 0x00000004;
private static final int KEYBOARD_BRIGHT_BIT = 0x00000008;
private static final int BATTERY_LOW_BIT = 0x00000010;
// values for setPowerState
// SCREEN_OFF == everything off
private static final int SCREEN_OFF = 0x00000000;
// SCREEN_DIM == screen on, screen backlight dim
private static final int SCREEN_DIM = SCREEN_ON_BIT;
// SCREEN_BRIGHT == screen on, screen backlight bright
private static final int SCREEN_BRIGHT = SCREEN_ON_BIT | SCREEN_BRIGHT_BIT;
// SCREEN_BUTTON_BRIGHT == screen on, screen and button backlights bright
private static final int SCREEN_BUTTON_BRIGHT = SCREEN_BRIGHT | BUTTON_BRIGHT_BIT;
// SCREEN_BUTTON_BRIGHT == screen on, screen, button and keyboard backlights bright
private static final int ALL_BRIGHT = SCREEN_BUTTON_BRIGHT | KEYBOARD_BRIGHT_BIT;
// used for noChangeLights in setPowerState()
private static final int LIGHTS_MASK = SCREEN_BRIGHT_BIT | BUTTON_BRIGHT_BIT | KEYBOARD_BRIGHT_BIT;
static final boolean ANIMATE_SCREEN_LIGHTS = true;
static final boolean ANIMATE_BUTTON_LIGHTS = false;
static final boolean ANIMATE_KEYBOARD_LIGHTS = false;
static final int ANIM_STEPS = 60/4;
// Slower animation for autobrightness changes
static final int AUTOBRIGHTNESS_ANIM_STEPS = 60;
// These magic numbers are the initial state of the LEDs at boot. Ideally
// we should read them from the driver, but our current hardware returns 0
// for the initial value. Oops!
static final int INITIAL_SCREEN_BRIGHTNESS = 255;
static final int INITIAL_BUTTON_BRIGHTNESS = Power.BRIGHTNESS_OFF;
static final int INITIAL_KEYBOARD_BRIGHTNESS = Power.BRIGHTNESS_OFF;
private final int MY_UID;
private boolean mDoneBooting = false;
private boolean mBootCompleted = false;
private int mStayOnConditions = 0;
private final int[] mBroadcastQueue = new int[] { -1, -1, -1 };
private final int[] mBroadcastWhy = new int[3];
private int mPartialCount = 0;
private int mPowerState;
// mScreenOffReason can be WindowManagerPolicy.OFF_BECAUSE_OF_USER,
// WindowManagerPolicy.OFF_BECAUSE_OF_TIMEOUT or WindowManagerPolicy.OFF_BECAUSE_OF_PROX_SENSOR
private int mScreenOffReason;
private int mUserState;
private boolean mKeyboardVisible = false;
private boolean mUserActivityAllowed = true;
private int mProximityWakeLockCount = 0;
private boolean mProximitySensorEnabled = false;
private boolean mProximitySensorActive = false;
private int mProximityPendingValue = -1; // -1 == nothing, 0 == inactive, 1 == active
private long mLastProximityEventTime;
private int mScreenOffTimeoutSetting;
private int mMaximumScreenOffTimeout = Integer.MAX_VALUE;
private int mKeylightDelay;
private int mDimDelay;
private int mScreenOffDelay;
private int mWakeLockState;
private long mLastEventTime = 0;
private long mScreenOffTime;
private volatile WindowManagerPolicy mPolicy;
private final LockList mLocks = new LockList();
private Intent mScreenOffIntent;
private Intent mScreenOnIntent;
private LightsService mLightsService;
private Context mContext;
private LightsService.Light mLcdLight;
private LightsService.Light mButtonLight;
private LightsService.Light mKeyboardLight;
private LightsService.Light mAttentionLight;
private UnsynchronizedWakeLock mBroadcastWakeLock;
private UnsynchronizedWakeLock mStayOnWhilePluggedInScreenDimLock;
private UnsynchronizedWakeLock mStayOnWhilePluggedInPartialLock;
private UnsynchronizedWakeLock mPreventScreenOnPartialLock;
private UnsynchronizedWakeLock mProximityPartialLock;
private HandlerThread mHandlerThread;
private Handler mHandler;
private final TimeoutTask mTimeoutTask = new TimeoutTask();
private final LightAnimator mLightAnimator = new LightAnimator();
private final BrightnessState mScreenBrightness
= new BrightnessState(SCREEN_BRIGHT_BIT);
private final BrightnessState mKeyboardBrightness
= new BrightnessState(KEYBOARD_BRIGHT_BIT);
private final BrightnessState mButtonBrightness
= new BrightnessState(BUTTON_BRIGHT_BIT);
private boolean mStillNeedSleepNotification;
private boolean mIsPowered = false;
private IActivityManager mActivityService;
private IBatteryStats mBatteryStats;
private BatteryService mBatteryService;
private SensorManager mSensorManager;
private Sensor mProximitySensor;
private Sensor mLightSensor;
private boolean mLightSensorEnabled;
private float mLightSensorValue = -1;
private int mHighestLightSensorValue = -1;
private float mLightSensorPendingValue = -1;
private int mLightSensorScreenBrightness = -1;
private int mLightSensorButtonBrightness = -1;
private int mLightSensorKeyboardBrightness = -1;
private boolean mDimScreen = true;
private boolean mIsDocked = false;
private long mNextTimeout;
private volatile int mPokey = 0;
private volatile boolean mPokeAwakeOnSet = false;
private volatile boolean mInitComplete = false;
private final HashMap<IBinder,PokeLock> mPokeLocks = new HashMap<IBinder,PokeLock>();
// mLastScreenOnTime is the time the screen was last turned on
private long mLastScreenOnTime;
private boolean mPreventScreenOn;
private int mScreenBrightnessOverride = -1;
private int mButtonBrightnessOverride = -1;
private boolean mUseSoftwareAutoBrightness;
private boolean mAutoBrightessEnabled;
private int[] mAutoBrightnessLevels;
private int[] mLcdBacklightValues;
private int[] mButtonBacklightValues;
private int[] mKeyboardBacklightValues;
private int mLightSensorWarmupTime;
// Used when logging number and duration of touch-down cycles
private long mTotalTouchDownTime;
private long mLastTouchDown;
private int mTouchCycles;
// could be either static or controllable at runtime
private static final boolean mSpew = false;
private static final boolean mDebugProximitySensor = (true || mSpew);
private static final boolean mDebugLightSensor = (false || mSpew);
private native void nativeInit();
private native void nativeSetPowerState(boolean screenOn, boolean screenBright);
/*
static PrintStream mLog;
static {
try {
mLog = new PrintStream("/data/power.log");
}
catch (FileNotFoundException e) {
android.util.Slog.e(TAG, "Life is hard", e);
}
}
static class Log {
static void d(String tag, String s) {
mLog.println(s);
android.util.Slog.d(tag, s);
}
static void i(String tag, String s) {
mLog.println(s);
android.util.Slog.i(tag, s);
}
static void w(String tag, String s) {
mLog.println(s);
android.util.Slog.w(tag, s);
}
static void e(String tag, String s) {
mLog.println(s);
android.util.Slog.e(tag, s);
}
}
*/
/**
* This class works around a deadlock between the lock in PowerManager.WakeLock
* and our synchronizing on mLocks. PowerManager.WakeLock synchronizes on its
* mToken object so it can be accessed from any thread, but it calls into here
* with its lock held. This class is essentially a reimplementation of
* PowerManager.WakeLock, but without that extra synchronized block, because we'll
* only call it with our own locks held.
*/
private class UnsynchronizedWakeLock {
int mFlags;
String mTag;
IBinder mToken;
int mCount = 0;
boolean mRefCounted;
boolean mHeld;
UnsynchronizedWakeLock(int flags, String tag, boolean refCounted) {
mFlags = flags;
mTag = tag;
mToken = new Binder();
mRefCounted = refCounted;
}
public void acquire() {
if (!mRefCounted || mCount++ == 0) {
long ident = Binder.clearCallingIdentity();
try {
PowerManagerService.this.acquireWakeLockLocked(mFlags, mToken,
MY_UID, mTag);
mHeld = true;
} finally {
Binder.restoreCallingIdentity(ident);
}
}
}
public void release() {
if (!mRefCounted || --mCount == 0) {
PowerManagerService.this.releaseWakeLockLocked(mToken, 0, false);
mHeld = false;
}
if (mCount < 0) {
throw new RuntimeException("WakeLock under-locked " + mTag);
}
}
public boolean isHeld()
{
return mHeld;
}
public String toString() {
return "UnsynchronizedWakeLock(mFlags=0x" + Integer.toHexString(mFlags)
+ " mCount=" + mCount + " mHeld=" + mHeld + ")";
}
}
private final class BatteryReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
synchronized (mLocks) {
boolean wasPowered = mIsPowered;
mIsPowered = mBatteryService.isPowered();
if (mIsPowered != wasPowered) {
// update mStayOnWhilePluggedIn wake lock
updateWakeLockLocked();
// treat plugging and unplugging the devices as a user activity.
// users find it disconcerting when they unplug the device
// and it shuts off right away.
// to avoid turning on the screen when unplugging, we only trigger
// user activity when screen was already on.
// temporarily set mUserActivityAllowed to true so this will work
// even when the keyguard is on.
synchronized (mLocks) {
if (!wasPowered || (mPowerState & SCREEN_ON_BIT) != 0) {
forceUserActivityLocked();
}
}
}
}
}
}
private final class BootCompletedReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
bootCompleted();
}
}
private final class DockReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
int state = intent.getIntExtra(Intent.EXTRA_DOCK_STATE,
Intent.EXTRA_DOCK_STATE_UNDOCKED);
dockStateChanged(state);
}
}
/**
* Set the setting that determines whether the device stays on when plugged in.
* The argument is a bit string, with each bit specifying a power source that,
* when the device is connected to that source, causes the device to stay on.
* See {@link android.os.BatteryManager} for the list of power sources that
* can be specified. Current values include {@link android.os.BatteryManager#BATTERY_PLUGGED_AC}
* and {@link android.os.BatteryManager#BATTERY_PLUGGED_USB}
* @param val an {@code int} containing the bits that specify which power sources
* should cause the device to stay on.
*/
public void setStayOnSetting(int val) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WRITE_SETTINGS, null);
Settings.System.putInt(mContext.getContentResolver(),
Settings.System.STAY_ON_WHILE_PLUGGED_IN, val);
}
public void setMaximumScreenOffTimeount(int timeMs) {
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.WRITE_SECURE_SETTINGS, null);
synchronized (mLocks) {
mMaximumScreenOffTimeout = timeMs;
// recalculate everything
setScreenOffTimeoutsLocked();
}
}
private class SettingsObserver implements Observer {
private int getInt(String name) {
return mSettings.getValues(name).getAsInteger(Settings.System.VALUE);
}
public void update(Observable o, Object arg) {
synchronized (mLocks) {
// STAY_ON_WHILE_PLUGGED_IN
mStayOnConditions = getInt(STAY_ON_WHILE_PLUGGED_IN);
updateWakeLockLocked();
// SCREEN_OFF_TIMEOUT
mScreenOffTimeoutSetting = getInt(SCREEN_OFF_TIMEOUT);
// DIM_SCREEN
//mDimScreen = getInt(DIM_SCREEN) != 0;
// SCREEN_BRIGHTNESS_MODE
setScreenBrightnessMode(getInt(SCREEN_BRIGHTNESS_MODE));
// recalculate everything
setScreenOffTimeoutsLocked();
}
}
}
PowerManagerService()
{
// Hack to get our uid... should have a func for this.
long token = Binder.clearCallingIdentity();
MY_UID = Binder.getCallingUid();
Binder.restoreCallingIdentity(token);
// XXX remove this when the kernel doesn't timeout wake locks
Power.setLastUserActivityTimeout(7*24*3600*1000); // one week
// assume nothing is on yet
mUserState = mPowerState = 0;
// Add ourself to the Watchdog monitors.
Watchdog.getInstance().addMonitor(this);
}
private ContentQueryMap mSettings;
void init(Context context, LightsService lights, IActivityManager activity,
BatteryService battery) {
mLightsService = lights;
mContext = context;
mActivityService = activity;
mBatteryStats = BatteryStatsService.getService();
mBatteryService = battery;
mLcdLight = lights.getLight(LightsService.LIGHT_ID_BACKLIGHT);
mButtonLight = lights.getLight(LightsService.LIGHT_ID_BUTTONS);
mKeyboardLight = lights.getLight(LightsService.LIGHT_ID_KEYBOARD);
mAttentionLight = lights.getLight(LightsService.LIGHT_ID_ATTENTION);
mHandlerThread = new HandlerThread("PowerManagerService") {
@Override
protected void onLooperPrepared() {
super.onLooperPrepared();
initInThread();
}
};
mHandlerThread.start();
synchronized (mHandlerThread) {
while (!mInitComplete) {
try {
mHandlerThread.wait();
} catch (InterruptedException e) {
// Ignore
}
}
}
nativeInit();
synchronized (mLocks) {
updateNativePowerStateLocked();
}
}
void initInThread() {
mHandler = new Handler();
mBroadcastWakeLock = new UnsynchronizedWakeLock(
PowerManager.PARTIAL_WAKE_LOCK, "sleep_broadcast", true);
mStayOnWhilePluggedInScreenDimLock = new UnsynchronizedWakeLock(
PowerManager.SCREEN_DIM_WAKE_LOCK, "StayOnWhilePluggedIn Screen Dim", false);
mStayOnWhilePluggedInPartialLock = new UnsynchronizedWakeLock(
PowerManager.PARTIAL_WAKE_LOCK, "StayOnWhilePluggedIn Partial", false);
mPreventScreenOnPartialLock = new UnsynchronizedWakeLock(
PowerManager.PARTIAL_WAKE_LOCK, "PreventScreenOn Partial", false);
mProximityPartialLock = new UnsynchronizedWakeLock(
PowerManager.PARTIAL_WAKE_LOCK, "Proximity Partial", false);
mScreenOnIntent = new Intent(Intent.ACTION_SCREEN_ON);
mScreenOnIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
mScreenOffIntent = new Intent(Intent.ACTION_SCREEN_OFF);
mScreenOffIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
Resources resources = mContext.getResources();
// read settings for auto-brightness
mUseSoftwareAutoBrightness = resources.getBoolean(
com.android.internal.R.bool.config_automatic_brightness_available);
if (mUseSoftwareAutoBrightness) {
mAutoBrightnessLevels = resources.getIntArray(
com.android.internal.R.array.config_autoBrightnessLevels);
mLcdBacklightValues = resources.getIntArray(
com.android.internal.R.array.config_autoBrightnessLcdBacklightValues);
mButtonBacklightValues = resources.getIntArray(
com.android.internal.R.array.config_autoBrightnessButtonBacklightValues);
mKeyboardBacklightValues = resources.getIntArray(
com.android.internal.R.array.config_autoBrightnessKeyboardBacklightValues);
mLightSensorWarmupTime = resources.getInteger(
com.android.internal.R.integer.config_lightSensorWarmupTime);
}
ContentResolver resolver = mContext.getContentResolver();
Cursor settingsCursor = resolver.query(Settings.System.CONTENT_URI, null,
"(" + Settings.System.NAME + "=?) or ("
+ Settings.System.NAME + "=?) or ("
+ Settings.System.NAME + "=?) or ("
+ Settings.System.NAME + "=?)",
new String[]{STAY_ON_WHILE_PLUGGED_IN, SCREEN_OFF_TIMEOUT, DIM_SCREEN,
SCREEN_BRIGHTNESS_MODE},
null);
mSettings = new ContentQueryMap(settingsCursor, Settings.System.NAME, true, mHandler);
SettingsObserver settingsObserver = new SettingsObserver();
mSettings.addObserver(settingsObserver);
// pretend that the settings changed so we will get their initial state
settingsObserver.update(mSettings, null);
// register for the battery changed notifications
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_BATTERY_CHANGED);
mContext.registerReceiver(new BatteryReceiver(), filter);
filter = new IntentFilter();
filter.addAction(Intent.ACTION_BOOT_COMPLETED);
mContext.registerReceiver(new BootCompletedReceiver(), filter);
filter = new IntentFilter();
filter.addAction(Intent.ACTION_DOCK_EVENT);
mContext.registerReceiver(new DockReceiver(), filter);
// Listen for secure settings changes
mContext.getContentResolver().registerContentObserver(
Settings.Secure.CONTENT_URI, true,
new ContentObserver(new Handler()) {
public void onChange(boolean selfChange) {
updateSettingsValues();
}
});
updateSettingsValues();
synchronized (mHandlerThread) {
mInitComplete = true;
mHandlerThread.notifyAll();
}
}
private class WakeLock implements IBinder.DeathRecipient
{
WakeLock(int f, IBinder b, String t, int u) {
super();
flags = f;
binder = b;
tag = t;
uid = u == MY_UID ? Process.SYSTEM_UID : u;
pid = Binder.getCallingPid();
if (u != MY_UID || (
!"KEEP_SCREEN_ON_FLAG".equals(tag)
&& !"KeyInputQueue".equals(tag))) {
monitorType = (f & LOCK_MASK) == PowerManager.PARTIAL_WAKE_LOCK
? BatteryStats.WAKE_TYPE_PARTIAL
: BatteryStats.WAKE_TYPE_FULL;
} else {
monitorType = -1;
}
try {
b.linkToDeath(this, 0);
} catch (RemoteException e) {
binderDied();
}
}
public void binderDied() {
synchronized (mLocks) {
releaseWakeLockLocked(this.binder, 0, true);
}
}
final int flags;
final IBinder binder;
final String tag;
final int uid;
final int pid;
final int monitorType;
boolean activated = true;
int minState;
}
private void updateWakeLockLocked() {
if (mStayOnConditions != 0 && mBatteryService.isPowered(mStayOnConditions)) {
// keep the device on if we're plugged in and mStayOnWhilePluggedIn is set.
mStayOnWhilePluggedInScreenDimLock.acquire();
mStayOnWhilePluggedInPartialLock.acquire();
} else {
mStayOnWhilePluggedInScreenDimLock.release();
mStayOnWhilePluggedInPartialLock.release();
}
}
private boolean isScreenLock(int flags)
{
int n = flags & LOCK_MASK;
return n == PowerManager.FULL_WAKE_LOCK
|| n == PowerManager.SCREEN_BRIGHT_WAKE_LOCK
|| n == PowerManager.SCREEN_DIM_WAKE_LOCK;
}
public void acquireWakeLock(int flags, IBinder lock, String tag) {
int uid = Binder.getCallingUid();
if (uid != Process.myUid()) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null);
}
long ident = Binder.clearCallingIdentity();
try {
synchronized (mLocks) {
acquireWakeLockLocked(flags, lock, uid, tag);
}
} finally {
Binder.restoreCallingIdentity(ident);
}
}
public void acquireWakeLockLocked(int flags, IBinder lock, int uid, String tag) {
int acquireUid = -1;
String acquireName = null;
int acquireType = -1;
if (mSpew) {
Slog.d(TAG, "acquireWakeLock flags=0x" + Integer.toHexString(flags) + " tag=" + tag);
}
int index = mLocks.getIndex(lock);
WakeLock wl;
boolean newlock;
if (index < 0) {
wl = new WakeLock(flags, lock, tag, uid);
switch (wl.flags & LOCK_MASK)
{
case PowerManager.FULL_WAKE_LOCK:
if (mUseSoftwareAutoBrightness) {
wl.minState = SCREEN_BRIGHT;
} else {
wl.minState = (mKeyboardVisible ? ALL_BRIGHT : SCREEN_BUTTON_BRIGHT);
}
break;
case PowerManager.SCREEN_BRIGHT_WAKE_LOCK:
wl.minState = SCREEN_BRIGHT;
break;
case PowerManager.SCREEN_DIM_WAKE_LOCK:
wl.minState = SCREEN_DIM;
break;
case PowerManager.PARTIAL_WAKE_LOCK:
case PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK:
break;
default:
// just log and bail. we're in the server, so don't
// throw an exception.
Slog.e(TAG, "bad wakelock type for lock '" + tag + "' "
+ " flags=" + flags);
return;
}
mLocks.addLock(wl);
newlock = true;
} else {
wl = mLocks.get(index);
newlock = false;
}
if (isScreenLock(flags)) {
// if this causes a wakeup, we reactivate all of the locks and
// set it to whatever they want. otherwise, we modulate that
// by the current state so we never turn it more on than
// it already is.
if ((wl.flags & PowerManager.ACQUIRE_CAUSES_WAKEUP) != 0) {
int oldWakeLockState = mWakeLockState;
mWakeLockState = mLocks.reactivateScreenLocksLocked();
if (mSpew) {
Slog.d(TAG, "wakeup here mUserState=0x" + Integer.toHexString(mUserState)
+ " mWakeLockState=0x"
+ Integer.toHexString(mWakeLockState)
+ " previous wakeLockState=0x" + Integer.toHexString(oldWakeLockState));
}
} else {
if (mSpew) {
Slog.d(TAG, "here mUserState=0x" + Integer.toHexString(mUserState)
+ " mLocks.gatherState()=0x"
+ Integer.toHexString(mLocks.gatherState())
+ " mWakeLockState=0x" + Integer.toHexString(mWakeLockState));
}
mWakeLockState = (mUserState | mWakeLockState) & mLocks.gatherState();
}
setPowerState(mWakeLockState | mUserState);
}
else if ((flags & LOCK_MASK) == PowerManager.PARTIAL_WAKE_LOCK) {
if (newlock) {
mPartialCount++;
if (mPartialCount == 1) {
if (LOG_PARTIAL_WL) EventLog.writeEvent(EventLogTags.POWER_PARTIAL_WAKE_STATE, 1, tag);
}
}
Power.acquireWakeLock(Power.PARTIAL_WAKE_LOCK,PARTIAL_NAME);
} else if ((flags & LOCK_MASK) == PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK) {
mProximityWakeLockCount++;
if (mProximityWakeLockCount == 1) {
enableProximityLockLocked();
}
}
if (newlock) {
acquireUid = wl.uid;
acquireName = wl.tag;
acquireType = wl.monitorType;
}
if (acquireType >= 0) {
try {
mBatteryStats.noteStartWakelock(acquireUid, acquireName, acquireType);
} catch (RemoteException e) {
// Ignore
}
}
}
public void releaseWakeLock(IBinder lock, int flags) {
int uid = Binder.getCallingUid();
if (uid != Process.myUid()) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null);
}
synchronized (mLocks) {
releaseWakeLockLocked(lock, flags, false);
}
}
private void releaseWakeLockLocked(IBinder lock, int flags, boolean death) {
int releaseUid;
String releaseName;
int releaseType;
WakeLock wl = mLocks.removeLock(lock);
if (wl == null) {
return;
}
if (mSpew) {
Slog.d(TAG, "releaseWakeLock flags=0x"
+ Integer.toHexString(wl.flags) + " tag=" + wl.tag);
}
if (isScreenLock(wl.flags)) {
mWakeLockState = mLocks.gatherState();
// goes in the middle to reduce flicker
if ((wl.flags & PowerManager.ON_AFTER_RELEASE) != 0) {
userActivity(SystemClock.uptimeMillis(), false);
}
setPowerState(mWakeLockState | mUserState);
}
else if ((wl.flags & LOCK_MASK) == PowerManager.PARTIAL_WAKE_LOCK) {
mPartialCount--;
if (mPartialCount == 0) {
if (LOG_PARTIAL_WL) EventLog.writeEvent(EventLogTags.POWER_PARTIAL_WAKE_STATE, 0, wl.tag);
Power.releaseWakeLock(PARTIAL_NAME);
}
} else if ((wl.flags & LOCK_MASK) == PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK) {
mProximityWakeLockCount--;
if (mProximityWakeLockCount == 0) {
if (mProximitySensorActive &&
((flags & PowerManager.WAIT_FOR_PROXIMITY_NEGATIVE) != 0)) {
// wait for proximity sensor to go negative before disabling sensor
if (mDebugProximitySensor) {
Slog.d(TAG, "waiting for proximity sensor to go negative");
}
} else {
disableProximityLockLocked();
}
}
}
// Unlink the lock from the binder.
wl.binder.unlinkToDeath(wl, 0);
releaseUid = wl.uid;
releaseName = wl.tag;
releaseType = wl.monitorType;
if (releaseType >= 0) {
long origId = Binder.clearCallingIdentity();
try {
mBatteryStats.noteStopWakelock(releaseUid, releaseName, releaseType);
} catch (RemoteException e) {
// Ignore
} finally {
Binder.restoreCallingIdentity(origId);
}
}
}
private class PokeLock implements IBinder.DeathRecipient
{
PokeLock(int p, IBinder b, String t) {
super();
this.pokey = p;
this.binder = b;
this.tag = t;
try {
b.linkToDeath(this, 0);
} catch (RemoteException e) {
binderDied();
}
}
public void binderDied() {
setPokeLock(0, this.binder, this.tag);
}
int pokey;
IBinder binder;
String tag;
boolean awakeOnSet;
}
public void setPokeLock(int pokey, IBinder token, String tag) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
if (token == null) {
Slog.e(TAG, "setPokeLock got null token for tag='" + tag + "'");
return;
}
if ((pokey & POKE_LOCK_TIMEOUT_MASK) == POKE_LOCK_TIMEOUT_MASK) {
throw new IllegalArgumentException("setPokeLock can't have both POKE_LOCK_SHORT_TIMEOUT"
+ " and POKE_LOCK_MEDIUM_TIMEOUT");
}
synchronized (mLocks) {
if (pokey != 0) {
PokeLock p = mPokeLocks.get(token);
int oldPokey = 0;
if (p != null) {
oldPokey = p.pokey;
p.pokey = pokey;
} else {
p = new PokeLock(pokey, token, tag);
mPokeLocks.put(token, p);
}
int oldTimeout = oldPokey & POKE_LOCK_TIMEOUT_MASK;
int newTimeout = pokey & POKE_LOCK_TIMEOUT_MASK;
if (((mPowerState & SCREEN_ON_BIT) == 0) && (oldTimeout != newTimeout)) {
p.awakeOnSet = true;
}
} else {
PokeLock rLock = mPokeLocks.remove(token);
if (rLock != null) {
token.unlinkToDeath(rLock, 0);
}
}
int oldPokey = mPokey;
int cumulative = 0;
boolean oldAwakeOnSet = mPokeAwakeOnSet;
boolean awakeOnSet = false;
for (PokeLock p: mPokeLocks.values()) {
cumulative |= p.pokey;
if (p.awakeOnSet) {
awakeOnSet = true;
}
}
mPokey = cumulative;
mPokeAwakeOnSet = awakeOnSet;
int oldCumulativeTimeout = oldPokey & POKE_LOCK_TIMEOUT_MASK;
int newCumulativeTimeout = pokey & POKE_LOCK_TIMEOUT_MASK;
if (oldCumulativeTimeout != newCumulativeTimeout) {
setScreenOffTimeoutsLocked();
// reset the countdown timer, but use the existing nextState so it doesn't
// change anything
setTimeoutLocked(SystemClock.uptimeMillis(), mTimeoutTask.nextState);
}
}
}
private static String lockType(int type)
{
switch (type)
{
case PowerManager.FULL_WAKE_LOCK:
return "FULL_WAKE_LOCK ";
case PowerManager.SCREEN_BRIGHT_WAKE_LOCK:
return "SCREEN_BRIGHT_WAKE_LOCK ";
case PowerManager.SCREEN_DIM_WAKE_LOCK:
return "SCREEN_DIM_WAKE_LOCK ";
case PowerManager.PARTIAL_WAKE_LOCK:
return "PARTIAL_WAKE_LOCK ";
case PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK:
return "PROXIMITY_SCREEN_OFF_WAKE_LOCK";
default:
return "??? ";
}
}
private static String dumpPowerState(int state) {
return (((state & KEYBOARD_BRIGHT_BIT) != 0)
? "KEYBOARD_BRIGHT_BIT " : "")
+ (((state & SCREEN_BRIGHT_BIT) != 0)
? "SCREEN_BRIGHT_BIT " : "")
+ (((state & SCREEN_ON_BIT) != 0)
? "SCREEN_ON_BIT " : "")
+ (((state & BATTERY_LOW_BIT) != 0)
? "BATTERY_LOW_BIT " : "");
}
@Override
public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
!= PackageManager.PERMISSION_GRANTED) {
pw.println("Permission Denial: can't dump PowerManager from from pid="
+ Binder.getCallingPid()
+ ", uid=" + Binder.getCallingUid());
return;
}
long now = SystemClock.uptimeMillis();
synchronized (mLocks) {
pw.println("Power Manager State:");
pw.println(" mIsPowered=" + mIsPowered
+ " mPowerState=" + mPowerState
+ " mScreenOffTime=" + (SystemClock.elapsedRealtime()-mScreenOffTime)
+ " ms");
pw.println(" mPartialCount=" + mPartialCount);
pw.println(" mWakeLockState=" + dumpPowerState(mWakeLockState));
pw.println(" mUserState=" + dumpPowerState(mUserState));
pw.println(" mPowerState=" + dumpPowerState(mPowerState));
pw.println(" mLocks.gather=" + dumpPowerState(mLocks.gatherState()));
pw.println(" mNextTimeout=" + mNextTimeout + " now=" + now
+ " " + ((mNextTimeout-now)/1000) + "s from now");
pw.println(" mDimScreen=" + mDimScreen
+ " mStayOnConditions=" + mStayOnConditions);
pw.println(" mScreenOffReason=" + mScreenOffReason
+ " mUserState=" + mUserState);
pw.println(" mBroadcastQueue={" + mBroadcastQueue[0] + ',' + mBroadcastQueue[1]
+ ',' + mBroadcastQueue[2] + "}");
pw.println(" mBroadcastWhy={" + mBroadcastWhy[0] + ',' + mBroadcastWhy[1]
+ ',' + mBroadcastWhy[2] + "}");
pw.println(" mPokey=" + mPokey + " mPokeAwakeonSet=" + mPokeAwakeOnSet);
pw.println(" mKeyboardVisible=" + mKeyboardVisible
+ " mUserActivityAllowed=" + mUserActivityAllowed);
pw.println(" mKeylightDelay=" + mKeylightDelay + " mDimDelay=" + mDimDelay
+ " mScreenOffDelay=" + mScreenOffDelay);
pw.println(" mPreventScreenOn=" + mPreventScreenOn
+ " mScreenBrightnessOverride=" + mScreenBrightnessOverride
+ " mButtonBrightnessOverride=" + mButtonBrightnessOverride);
pw.println(" mScreenOffTimeoutSetting=" + mScreenOffTimeoutSetting
+ " mMaximumScreenOffTimeout=" + mMaximumScreenOffTimeout);
pw.println(" mLastScreenOnTime=" + mLastScreenOnTime);
pw.println(" mBroadcastWakeLock=" + mBroadcastWakeLock);
pw.println(" mStayOnWhilePluggedInScreenDimLock=" + mStayOnWhilePluggedInScreenDimLock);
pw.println(" mStayOnWhilePluggedInPartialLock=" + mStayOnWhilePluggedInPartialLock);
pw.println(" mPreventScreenOnPartialLock=" + mPreventScreenOnPartialLock);
pw.println(" mProximityPartialLock=" + mProximityPartialLock);
pw.println(" mProximityWakeLockCount=" + mProximityWakeLockCount);
pw.println(" mProximitySensorEnabled=" + mProximitySensorEnabled);
pw.println(" mProximitySensorActive=" + mProximitySensorActive);
pw.println(" mProximityPendingValue=" + mProximityPendingValue);
pw.println(" mLastProximityEventTime=" + mLastProximityEventTime);
pw.println(" mLightSensorEnabled=" + mLightSensorEnabled);
pw.println(" mLightSensorValue=" + mLightSensorValue
+ " mLightSensorPendingValue=" + mLightSensorPendingValue);
pw.println(" mLightSensorScreenBrightness=" + mLightSensorScreenBrightness
+ " mLightSensorButtonBrightness=" + mLightSensorButtonBrightness
+ " mLightSensorKeyboardBrightness=" + mLightSensorKeyboardBrightness);
pw.println(" mUseSoftwareAutoBrightness=" + mUseSoftwareAutoBrightness);
pw.println(" mAutoBrightessEnabled=" + mAutoBrightessEnabled);
mScreenBrightness.dump(pw, " mScreenBrightness: ");
mKeyboardBrightness.dump(pw, " mKeyboardBrightness: ");
mButtonBrightness.dump(pw, " mButtonBrightness: ");
int N = mLocks.size();
pw.println();
pw.println("mLocks.size=" + N + ":");
for (int i=0; i<N; i++) {
WakeLock wl = mLocks.get(i);
String type = lockType(wl.flags & LOCK_MASK);
String acquireCausesWakeup = "";
if ((wl.flags & PowerManager.ACQUIRE_CAUSES_WAKEUP) != 0) {
acquireCausesWakeup = "ACQUIRE_CAUSES_WAKEUP ";
}
String activated = "";
if (wl.activated) {
activated = " activated";
}
pw.println(" " + type + " '" + wl.tag + "'" + acquireCausesWakeup
+ activated + " (minState=" + wl.minState + ", uid=" + wl.uid
+ ", pid=" + wl.pid + ")");
}
pw.println();
pw.println("mPokeLocks.size=" + mPokeLocks.size() + ":");
for (PokeLock p: mPokeLocks.values()) {
pw.println(" poke lock '" + p.tag + "':"
+ ((p.pokey & POKE_LOCK_IGNORE_CHEEK_EVENTS) != 0
? " POKE_LOCK_IGNORE_CHEEK_EVENTS" : "")
+ ((p.pokey & POKE_LOCK_IGNORE_TOUCH_AND_CHEEK_EVENTS) != 0
? " POKE_LOCK_IGNORE_TOUCH_AND_CHEEK_EVENTS" : "")
+ ((p.pokey & POKE_LOCK_SHORT_TIMEOUT) != 0
? " POKE_LOCK_SHORT_TIMEOUT" : "")
+ ((p.pokey & POKE_LOCK_MEDIUM_TIMEOUT) != 0
? " POKE_LOCK_MEDIUM_TIMEOUT" : ""));
}
pw.println();
}
}
private void setTimeoutLocked(long now, int nextState) {
setTimeoutLocked(now, -1, nextState);
}
// If they gave a timeoutOverride it is the number of seconds
// to screen-off. Figure out where in the countdown cycle we
// should jump to.
private void setTimeoutLocked(long now, long timeoutOverride, int nextState) {
if (mBootCompleted) {
synchronized (mLocks) {
mHandler.removeCallbacks(mTimeoutTask);
mTimeoutTask.nextState = nextState;
long when = 0;
if (timeoutOverride <= 0) {
switch (nextState)
{
case SCREEN_BRIGHT:
when = now + mKeylightDelay;
break;
case SCREEN_DIM:
if (mDimDelay >= 0) {
when = now + mDimDelay;
break;
} else {
Slog.w(TAG, "mDimDelay=" + mDimDelay + " while trying to dim");
}
case SCREEN_OFF:
synchronized (mLocks) {
when = now + mScreenOffDelay;
}
break;
default:
when = now;
break;
}
} else {
override: {
if (timeoutOverride <= mScreenOffDelay) {
when = now + timeoutOverride;
nextState = SCREEN_OFF;
break override;
}
timeoutOverride -= mScreenOffDelay;
if (mDimDelay >= 0) {
if (timeoutOverride <= mDimDelay) {
when = now + timeoutOverride;
nextState = SCREEN_DIM;
break override;
}
timeoutOverride -= mDimDelay;
}
when = now + timeoutOverride;
nextState = SCREEN_BRIGHT;
}
}
if (mSpew) {
Slog.d(TAG, "setTimeoutLocked now=" + now
+ " timeoutOverride=" + timeoutOverride
+ " nextState=" + nextState + " when=" + when);
}
mHandler.postAtTime(mTimeoutTask, when);
mNextTimeout = when; // for debugging
}
}
}
private void cancelTimerLocked()
{
mHandler.removeCallbacks(mTimeoutTask);
mTimeoutTask.nextState = -1;
}
private class TimeoutTask implements Runnable
{
int nextState; // access should be synchronized on mLocks
public void run()
{
synchronized (mLocks) {
if (mSpew) {
Slog.d(TAG, "user activity timeout timed out nextState=" + this.nextState);
}
if (nextState == -1) {
return;
}
mUserState = this.nextState;
setPowerState(this.nextState | mWakeLockState);
long now = SystemClock.uptimeMillis();
switch (this.nextState)
{
case SCREEN_BRIGHT:
if (mDimDelay >= 0) {
setTimeoutLocked(now, SCREEN_DIM);
break;
}
case SCREEN_DIM:
setTimeoutLocked(now, SCREEN_OFF);
break;
}
}
}
}
private void sendNotificationLocked(boolean on, int why)
{
if (!on) {
mStillNeedSleepNotification = false;
}
// Add to the queue.
int index = 0;
while (mBroadcastQueue[index] != -1) {
index++;
}
mBroadcastQueue[index] = on ? 1 : 0;
mBroadcastWhy[index] = why;
// If we added it position 2, then there is a pair that can be stripped.
// If we added it position 1 and we're turning the screen off, we can strip
// the pair and do nothing, because the screen is already off, and therefore
// keyguard has already been enabled.
// However, if we added it at position 1 and we're turning it on, then position
// 0 was to turn it off, and we can't strip that, because keyguard needs to come
// on, so have to run the queue then.
if (index == 2) {
// While we're collapsing them, if it's going off, and the new reason
// is more significant than the first, then use the new one.
if (!on && mBroadcastWhy[0] > why) {
mBroadcastWhy[0] = why;
}
mBroadcastQueue[0] = on ? 1 : 0;
mBroadcastQueue[1] = -1;
mBroadcastQueue[2] = -1;
mBroadcastWakeLock.release();
mBroadcastWakeLock.release();
index = 0;
}
if (index == 1 && !on) {
mBroadcastQueue[0] = -1;
mBroadcastQueue[1] = -1;
index = -1;
// The wake lock was being held, but we're not actually going to do any
// broadcasts, so release the wake lock.
EventLog.writeEvent(EventLogTags.POWER_SCREEN_BROADCAST_STOP, 1, mBroadcastWakeLock.mCount);
mBroadcastWakeLock.release();
}
// Now send the message.
if (index >= 0) {
// Acquire the broadcast wake lock before changing the power
// state. It will be release after the broadcast is sent.
// We always increment the ref count for each notification in the queue
// and always decrement when that notification is handled.
mBroadcastWakeLock.acquire();
EventLog.writeEvent(EventLogTags.POWER_SCREEN_BROADCAST_SEND, mBroadcastWakeLock.mCount);
mHandler.post(mNotificationTask);
}
}
private Runnable mNotificationTask = new Runnable()
{
public void run()
{
while (true) {
int value;
int why;
WindowManagerPolicy policy;
synchronized (mLocks) {
value = mBroadcastQueue[0];
why = mBroadcastWhy[0];
for (int i=0; i<2; i++) {
mBroadcastQueue[i] = mBroadcastQueue[i+1];
mBroadcastWhy[i] = mBroadcastWhy[i+1];
}
policy = getPolicyLocked();
}
if (value == 1) {
mScreenOnStart = SystemClock.uptimeMillis();
policy.screenTurnedOn();
try {
ActivityManagerNative.getDefault().wakingUp();
} catch (RemoteException e) {
// ignore it
}
if (mSpew) {
Slog.d(TAG, "mBroadcastWakeLock=" + mBroadcastWakeLock);
}
if (mContext != null && ActivityManagerNative.isSystemReady()) {
mContext.sendOrderedBroadcast(mScreenOnIntent, null,
mScreenOnBroadcastDone, mHandler, 0, null, null);
} else {
synchronized (mLocks) {
EventLog.writeEvent(EventLogTags.POWER_SCREEN_BROADCAST_STOP, 2,
mBroadcastWakeLock.mCount);
mBroadcastWakeLock.release();
}
}
}
else if (value == 0) {
mScreenOffStart = SystemClock.uptimeMillis();
policy.screenTurnedOff(why);
try {
ActivityManagerNative.getDefault().goingToSleep();
} catch (RemoteException e) {
// ignore it.
}
if (mContext != null && ActivityManagerNative.isSystemReady()) {
mContext.sendOrderedBroadcast(mScreenOffIntent, null,
mScreenOffBroadcastDone, mHandler, 0, null, null);
} else {
synchronized (mLocks) {
EventLog.writeEvent(EventLogTags.POWER_SCREEN_BROADCAST_STOP, 3,
mBroadcastWakeLock.mCount);
mBroadcastWakeLock.release();
}
}
}
else {
// If we're in this case, then this handler is running for a previous
// paired transaction. mBroadcastWakeLock will already have been released.
break;
}
}
}
};
long mScreenOnStart;
private BroadcastReceiver mScreenOnBroadcastDone = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
synchronized (mLocks) {
EventLog.writeEvent(EventLogTags.POWER_SCREEN_BROADCAST_DONE, 1,
SystemClock.uptimeMillis() - mScreenOnStart, mBroadcastWakeLock.mCount);
mBroadcastWakeLock.release();
}
}
};
long mScreenOffStart;
private BroadcastReceiver mScreenOffBroadcastDone = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
synchronized (mLocks) {
EventLog.writeEvent(EventLogTags.POWER_SCREEN_BROADCAST_DONE, 0,
SystemClock.uptimeMillis() - mScreenOffStart, mBroadcastWakeLock.mCount);
mBroadcastWakeLock.release();
}
}
};
void logPointerUpEvent() {
if (LOG_TOUCH_DOWNS) {
mTotalTouchDownTime += SystemClock.elapsedRealtime() - mLastTouchDown;
mLastTouchDown = 0;
}
}
void logPointerDownEvent() {
if (LOG_TOUCH_DOWNS) {
// If we are not already timing a down/up sequence
if (mLastTouchDown == 0) {
mLastTouchDown = SystemClock.elapsedRealtime();
mTouchCycles++;
}
}
}
/**
* Prevents the screen from turning on even if it *should* turn on due
* to a subsequent full wake lock being acquired.
* <p>
* This is a temporary hack that allows an activity to "cover up" any
* display glitches that happen during the activity's startup
* sequence. (Specifically, this API was added to work around a
* cosmetic bug in the "incoming call" sequence, where the lock screen
* would flicker briefly before the incoming call UI became visible.)
* TODO: There ought to be a more elegant way of doing this,
* probably by having the PowerManager and ActivityManager
* work together to let apps specify that the screen on/off
* state should be synchronized with the Activity lifecycle.
* <p>
* Note that calling preventScreenOn(true) will NOT turn the screen
* off if it's currently on. (This API only affects *future*
* acquisitions of full wake locks.)
* But calling preventScreenOn(false) WILL turn the screen on if
* it's currently off because of a prior preventScreenOn(true) call.
* <p>
* Any call to preventScreenOn(true) MUST be followed promptly by a call
* to preventScreenOn(false). In fact, if the preventScreenOn(false)
* call doesn't occur within 5 seconds, we'll turn the screen back on
* ourselves (and log a warning about it); this prevents a buggy app
* from disabling the screen forever.)
* <p>
* TODO: this feature should really be controlled by a new type of poke
* lock (rather than an IPowerManager call).
*/
public void preventScreenOn(boolean prevent) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
synchronized (mLocks) {
if (prevent) {
// First of all, grab a partial wake lock to
// make sure the CPU stays on during the entire
// preventScreenOn(true) -> preventScreenOn(false) sequence.
mPreventScreenOnPartialLock.acquire();
// Post a forceReenableScreen() call (for 5 seconds in the
// future) to make sure the matching preventScreenOn(false) call
// has happened by then.
mHandler.removeCallbacks(mForceReenableScreenTask);
mHandler.postDelayed(mForceReenableScreenTask, 5000);
// Finally, set the flag that prevents the screen from turning on.
// (Below, in setPowerState(), we'll check mPreventScreenOn and
// we *won't* call setScreenStateLocked(true) if it's set.)
mPreventScreenOn = true;
} else {
// (Re)enable the screen.
mPreventScreenOn = false;
// We're "undoing" a the prior preventScreenOn(true) call, so we
// no longer need the 5-second safeguard.
mHandler.removeCallbacks(mForceReenableScreenTask);
// Forcibly turn on the screen if it's supposed to be on. (This
// handles the case where the screen is currently off because of
// a prior preventScreenOn(true) call.)
if (!mProximitySensorActive && (mPowerState & SCREEN_ON_BIT) != 0) {
if (mSpew) {
Slog.d(TAG,
"preventScreenOn: turning on after a prior preventScreenOn(true)!");
}
int err = setScreenStateLocked(true);
if (err != 0) {
Slog.w(TAG, "preventScreenOn: error from setScreenStateLocked(): " + err);
}
}
// Release the partial wake lock that we held during the
// preventScreenOn(true) -> preventScreenOn(false) sequence.
mPreventScreenOnPartialLock.release();
}
}
}
public void setScreenBrightnessOverride(int brightness) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
if (mSpew) Slog.d(TAG, "setScreenBrightnessOverride " + brightness);
synchronized (mLocks) {
if (mScreenBrightnessOverride != brightness) {
mScreenBrightnessOverride = brightness;
if (isScreenOn()) {
updateLightsLocked(mPowerState, SCREEN_ON_BIT);
}
}
}
}
public void setButtonBrightnessOverride(int brightness) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
if (mSpew) Slog.d(TAG, "setButtonBrightnessOverride " + brightness);
synchronized (mLocks) {
if (mButtonBrightnessOverride != brightness) {
mButtonBrightnessOverride = brightness;
if (isScreenOn()) {
updateLightsLocked(mPowerState, BUTTON_BRIGHT_BIT | KEYBOARD_BRIGHT_BIT);
}
}
}
}
/**
* Sanity-check that gets called 5 seconds after any call to
* preventScreenOn(true). This ensures that the original call
* is followed promptly by a call to preventScreenOn(false).
*/
private void forceReenableScreen() {
// We shouldn't get here at all if mPreventScreenOn is false, since
// we should have already removed any existing
// mForceReenableScreenTask messages...
if (!mPreventScreenOn) {
Slog.w(TAG, "forceReenableScreen: mPreventScreenOn is false, nothing to do");
return;
}
// Uh oh. It's been 5 seconds since a call to
// preventScreenOn(true) and we haven't re-enabled the screen yet.
// This means the app that called preventScreenOn(true) is either
// slow (i.e. it took more than 5 seconds to call preventScreenOn(false)),
// or buggy (i.e. it forgot to call preventScreenOn(false), or
// crashed before doing so.)
// Log a warning, and forcibly turn the screen back on.
Slog.w(TAG, "App called preventScreenOn(true) but didn't promptly reenable the screen! "
+ "Forcing the screen back on...");
preventScreenOn(false);
}
private Runnable mForceReenableScreenTask = new Runnable() {
public void run() {
forceReenableScreen();
}
};
private int setScreenStateLocked(boolean on) {
int err = Power.setScreenState(on);
if (err == 0) {
mLastScreenOnTime = (on ? SystemClock.elapsedRealtime() : 0);
if (mUseSoftwareAutoBrightness) {
enableLightSensor(on);
if (!on) {
// make sure button and key backlights are off too
mButtonLight.turnOff();
mKeyboardLight.turnOff();
// clear current value so we will update based on the new conditions
// when the sensor is reenabled.
mLightSensorValue = -1;
// reset our highest light sensor value when the screen turns off
mHighestLightSensorValue = -1;
}
}
}
return err;
}
private void setPowerState(int state)
{
setPowerState(state, false, WindowManagerPolicy.OFF_BECAUSE_OF_TIMEOUT);
}
private void setPowerState(int newState, boolean noChangeLights, int reason)
{
synchronized (mLocks) {
int err;
if (mSpew) {
Slog.d(TAG, "setPowerState: mPowerState=0x" + Integer.toHexString(mPowerState)
+ " newState=0x" + Integer.toHexString(newState)
+ " noChangeLights=" + noChangeLights
+ " reason=" + reason);
}
if (noChangeLights) {
newState = (newState & ~LIGHTS_MASK) | (mPowerState & LIGHTS_MASK);
}
if (mProximitySensorActive) {
// don't turn on the screen when the proximity sensor lock is held
newState = (newState & ~SCREEN_BRIGHT);
}
if (batteryIsLow()) {
newState |= BATTERY_LOW_BIT;
} else {
newState &= ~BATTERY_LOW_BIT;
}
if (newState == mPowerState) {
return;
}
if (!mBootCompleted && !mUseSoftwareAutoBrightness) {
newState |= ALL_BRIGHT;
}
boolean oldScreenOn = (mPowerState & SCREEN_ON_BIT) != 0;
boolean newScreenOn = (newState & SCREEN_ON_BIT) != 0;
if (mSpew) {
Slog.d(TAG, "setPowerState: mPowerState=" + mPowerState
+ " newState=" + newState + " noChangeLights=" + noChangeLights);
Slog.d(TAG, " oldKeyboardBright=" + ((mPowerState & KEYBOARD_BRIGHT_BIT) != 0)
+ " newKeyboardBright=" + ((newState & KEYBOARD_BRIGHT_BIT) != 0));
Slog.d(TAG, " oldScreenBright=" + ((mPowerState & SCREEN_BRIGHT_BIT) != 0)
+ " newScreenBright=" + ((newState & SCREEN_BRIGHT_BIT) != 0));
Slog.d(TAG, " oldButtonBright=" + ((mPowerState & BUTTON_BRIGHT_BIT) != 0)
+ " newButtonBright=" + ((newState & BUTTON_BRIGHT_BIT) != 0));
Slog.d(TAG, " oldScreenOn=" + oldScreenOn
+ " newScreenOn=" + newScreenOn);
Slog.d(TAG, " oldBatteryLow=" + ((mPowerState & BATTERY_LOW_BIT) != 0)
+ " newBatteryLow=" + ((newState & BATTERY_LOW_BIT) != 0));
}
if (mPowerState != newState) {
updateLightsLocked(newState, 0);
mPowerState = (mPowerState & ~LIGHTS_MASK) | (newState & LIGHTS_MASK);
}
if (oldScreenOn != newScreenOn) {
if (newScreenOn) {
// When the user presses the power button, we need to always send out the
// notification that it's going to sleep so the keyguard goes on. But
// we can't do that until the screen fades out, so we don't show the keyguard
// too early.
if (mStillNeedSleepNotification) {
sendNotificationLocked(false, WindowManagerPolicy.OFF_BECAUSE_OF_USER);
}
// Turn on the screen UNLESS there was a prior
// preventScreenOn(true) request. (Note that the lifetime
// of a single preventScreenOn() request is limited to 5
// seconds to prevent a buggy app from disabling the
// screen forever; see forceReenableScreen().)
boolean reallyTurnScreenOn = true;
if (mSpew) {
Slog.d(TAG, "- turning screen on... mPreventScreenOn = "
+ mPreventScreenOn);
}
if (mPreventScreenOn) {
if (mSpew) {
Slog.d(TAG, "- PREVENTING screen from really turning on!");
}
reallyTurnScreenOn = false;
}
if (reallyTurnScreenOn) {
err = setScreenStateLocked(true);
long identity = Binder.clearCallingIdentity();
try {
mBatteryStats.noteScreenBrightness(getPreferredBrightness());
mBatteryStats.noteScreenOn();
} catch (RemoteException e) {
Slog.w(TAG, "RemoteException calling noteScreenOn on BatteryStatsService", e);
} finally {
Binder.restoreCallingIdentity(identity);
}
} else {
setScreenStateLocked(false);
// But continue as if we really did turn the screen on...
err = 0;
}
mLastTouchDown = 0;
mTotalTouchDownTime = 0;
mTouchCycles = 0;
EventLog.writeEvent(EventLogTags.POWER_SCREEN_STATE, 1, reason,
mTotalTouchDownTime, mTouchCycles);
if (err == 0) {
mPowerState |= SCREEN_ON_BIT;
sendNotificationLocked(true, -1);
}
} else {
// cancel light sensor task
mHandler.removeCallbacks(mAutoBrightnessTask);
mScreenOffTime = SystemClock.elapsedRealtime();
long identity = Binder.clearCallingIdentity();
try {
mBatteryStats.noteScreenOff();
} catch (RemoteException e) {
Slog.w(TAG, "RemoteException calling noteScreenOff on BatteryStatsService", e);
} finally {
Binder.restoreCallingIdentity(identity);
}
mPowerState &= ~SCREEN_ON_BIT;
mScreenOffReason = reason;
if (!mScreenBrightness.animating) {
err = screenOffFinishedAnimatingLocked(reason);
} else {
err = 0;
mLastTouchDown = 0;
}
}
}
updateNativePowerStateLocked();
}
}
private void updateNativePowerStateLocked() {
nativeSetPowerState(
(mPowerState & SCREEN_ON_BIT) != 0,
(mPowerState & SCREEN_BRIGHT) == SCREEN_BRIGHT);
}
private int screenOffFinishedAnimatingLocked(int reason) {
// I don't think we need to check the current state here because all of these
// Power.setScreenState and sendNotificationLocked can both handle being
// called multiple times in the same state. -joeo
EventLog.writeEvent(EventLogTags.POWER_SCREEN_STATE, 0, reason, mTotalTouchDownTime, mTouchCycles);
mLastTouchDown = 0;
int err = setScreenStateLocked(false);
if (err == 0) {
mScreenOffReason = reason;
sendNotificationLocked(false, reason);
}
return err;
}
private boolean batteryIsLow() {
return (!mIsPowered &&
mBatteryService.getBatteryLevel() <= Power.LOW_BATTERY_THRESHOLD);
}
private void updateLightsLocked(int newState, int forceState) {
final int oldState = mPowerState;
newState = applyButtonState(newState);
newState = applyKeyboardState(newState);
final int realDifference = (newState ^ oldState);
final int difference = realDifference | forceState;
if (difference == 0) {
return;
}
int offMask = 0;
int dimMask = 0;
int onMask = 0;
int preferredBrightness = getPreferredBrightness();
boolean startAnimation = false;
if ((difference & KEYBOARD_BRIGHT_BIT) != 0) {
if (ANIMATE_KEYBOARD_LIGHTS) {
if ((newState & KEYBOARD_BRIGHT_BIT) == 0) {
mKeyboardBrightness.setTargetLocked(Power.BRIGHTNESS_OFF,
ANIM_STEPS, INITIAL_KEYBOARD_BRIGHTNESS,
Power.BRIGHTNESS_ON);
} else {
mKeyboardBrightness.setTargetLocked(Power.BRIGHTNESS_ON,
ANIM_STEPS, INITIAL_KEYBOARD_BRIGHTNESS,
Power.BRIGHTNESS_OFF);
}
startAnimation = true;
} else {
if ((newState & KEYBOARD_BRIGHT_BIT) == 0) {
offMask |= KEYBOARD_BRIGHT_BIT;
} else {
onMask |= KEYBOARD_BRIGHT_BIT;
}
}
}
if ((difference & BUTTON_BRIGHT_BIT) != 0) {
if (ANIMATE_BUTTON_LIGHTS) {
if ((newState & BUTTON_BRIGHT_BIT) == 0) {
mButtonBrightness.setTargetLocked(Power.BRIGHTNESS_OFF,
ANIM_STEPS, INITIAL_BUTTON_BRIGHTNESS,
Power.BRIGHTNESS_ON);
} else {
mButtonBrightness.setTargetLocked(Power.BRIGHTNESS_ON,
ANIM_STEPS, INITIAL_BUTTON_BRIGHTNESS,
Power.BRIGHTNESS_OFF);
}
startAnimation = true;
} else {
if ((newState & BUTTON_BRIGHT_BIT) == 0) {
offMask |= BUTTON_BRIGHT_BIT;
} else {
onMask |= BUTTON_BRIGHT_BIT;
}
}
}
if ((difference & (SCREEN_ON_BIT | SCREEN_BRIGHT_BIT)) != 0) {
if (ANIMATE_SCREEN_LIGHTS) {
int nominalCurrentValue = -1;
// If there was an actual difference in the light state, then
// figure out the "ideal" current value based on the previous
// state. Otherwise, this is a change due to the brightness
// override, so we want to animate from whatever the current
// value is.
if ((realDifference & (SCREEN_ON_BIT | SCREEN_BRIGHT_BIT)) != 0) {
switch (oldState & (SCREEN_BRIGHT_BIT|SCREEN_ON_BIT)) {
case SCREEN_BRIGHT_BIT | SCREEN_ON_BIT:
nominalCurrentValue = preferredBrightness;
break;
case SCREEN_ON_BIT:
nominalCurrentValue = Power.BRIGHTNESS_DIM;
break;
case 0:
nominalCurrentValue = Power.BRIGHTNESS_OFF;
break;
case SCREEN_BRIGHT_BIT:
default:
// not possible
nominalCurrentValue = (int)mScreenBrightness.curValue;
break;
}
}
int brightness = preferredBrightness;
int steps = ANIM_STEPS;
if ((newState & SCREEN_BRIGHT_BIT) == 0) {
// dim or turn off backlight, depending on if the screen is on
// the scale is because the brightness ramp isn't linear and this biases
// it so the later parts take longer.
final float scale = 1.5f;
float ratio = (((float)Power.BRIGHTNESS_DIM)/preferredBrightness);
if (ratio > 1.0f) ratio = 1.0f;
if ((newState & SCREEN_ON_BIT) == 0) {
if ((oldState & SCREEN_BRIGHT_BIT) != 0) {
// was bright
steps = ANIM_STEPS;
} else {
// was dim
steps = (int)(ANIM_STEPS*ratio*scale);
}
brightness = Power.BRIGHTNESS_OFF;
} else {
if ((oldState & SCREEN_ON_BIT) != 0) {
// was bright
steps = (int)(ANIM_STEPS*(1.0f-ratio)*scale);
} else {
// was dim
steps = (int)(ANIM_STEPS*ratio);
}
if (mStayOnConditions != 0 && mBatteryService.isPowered(mStayOnConditions)) {
// If the "stay on while plugged in" option is
// turned on, then the screen will often not
// automatically turn off while plugged in. To
// still have a sense of when it is inactive, we
// will then count going dim as turning off.
mScreenOffTime = SystemClock.elapsedRealtime();
}
brightness = Power.BRIGHTNESS_DIM;
}
}
long identity = Binder.clearCallingIdentity();
try {
mBatteryStats.noteScreenBrightness(brightness);
} catch (RemoteException e) {
// Nothing interesting to do.
} finally {
Binder.restoreCallingIdentity(identity);
}
if (mScreenBrightness.setTargetLocked(brightness,
steps, INITIAL_SCREEN_BRIGHTNESS, nominalCurrentValue)) {
startAnimation = true;
}
} else {
if ((newState & SCREEN_BRIGHT_BIT) == 0) {
// dim or turn off backlight, depending on if the screen is on
if ((newState & SCREEN_ON_BIT) == 0) {
offMask |= SCREEN_BRIGHT_BIT;
} else {
dimMask |= SCREEN_BRIGHT_BIT;
}
} else {
onMask |= SCREEN_BRIGHT_BIT;
}
}
}
if (startAnimation) {
if (mSpew) {
Slog.i(TAG, "Scheduling light animator!");
}
mHandler.removeCallbacks(mLightAnimator);
mHandler.post(mLightAnimator);
}
if (offMask != 0) {
if (mSpew) Slog.i(TAG, "Setting brightess off: " + offMask);
setLightBrightness(offMask, Power.BRIGHTNESS_OFF);
}
if (dimMask != 0) {
int brightness = Power.BRIGHTNESS_DIM;
if ((newState & BATTERY_LOW_BIT) != 0 &&
brightness > Power.BRIGHTNESS_LOW_BATTERY) {
brightness = Power.BRIGHTNESS_LOW_BATTERY;
}
if (mSpew) Slog.i(TAG, "Setting brightess dim " + brightness + ": " + dimMask);
setLightBrightness(dimMask, brightness);
}
if (onMask != 0) {
int brightness = getPreferredBrightness();
if ((newState & BATTERY_LOW_BIT) != 0 &&
brightness > Power.BRIGHTNESS_LOW_BATTERY) {
brightness = Power.BRIGHTNESS_LOW_BATTERY;
}
if (mSpew) Slog.i(TAG, "Setting brightess on " + brightness + ": " + onMask);
setLightBrightness(onMask, brightness);
}
}
private void setLightBrightness(int mask, int value) {
int brightnessMode = (mAutoBrightessEnabled
? LightsService.BRIGHTNESS_MODE_SENSOR
: LightsService.BRIGHTNESS_MODE_USER);
if ((mask & SCREEN_BRIGHT_BIT) != 0) {
mLcdLight.setBrightness(value, brightnessMode);
}
if ((mask & BUTTON_BRIGHT_BIT) != 0) {
mButtonLight.setBrightness(value);
}
if ((mask & KEYBOARD_BRIGHT_BIT) != 0) {
mKeyboardLight.setBrightness(value);
}
}
class BrightnessState {
final int mask;
boolean initialized;
int targetValue;
float curValue;
float delta;
boolean animating;
BrightnessState(int m) {
mask = m;
}
public void dump(PrintWriter pw, String prefix) {
pw.println(prefix + "animating=" + animating
+ " targetValue=" + targetValue
+ " curValue=" + curValue
+ " delta=" + delta);
}
boolean setTargetLocked(int target, int stepsToTarget, int initialValue,
int nominalCurrentValue) {
if (!initialized) {
initialized = true;
curValue = (float)initialValue;
} else if (targetValue == target) {
return false;
}
targetValue = target;
delta = (targetValue -
(nominalCurrentValue >= 0 ? nominalCurrentValue : curValue))
/ stepsToTarget;
if (mSpew) {
String noticeMe = nominalCurrentValue == curValue ? "" : " ******************";
Slog.i(TAG, "Setting target " + mask + ": cur=" + curValue
+ " target=" + targetValue + " delta=" + delta
+ " nominalCurrentValue=" + nominalCurrentValue
+ noticeMe);
}
animating = true;
return true;
}
boolean stepLocked() {
if (!animating) return false;
if (false && mSpew) {
Slog.i(TAG, "Step target " + mask + ": cur=" + curValue
+ " target=" + targetValue + " delta=" + delta);
}
curValue += delta;
int curIntValue = (int)curValue;
boolean more = true;
if (delta == 0) {
curValue = curIntValue = targetValue;
more = false;
} else if (delta > 0) {
if (curIntValue >= targetValue) {
curValue = curIntValue = targetValue;
more = false;
}
} else {
if (curIntValue <= targetValue) {
curValue = curIntValue = targetValue;
more = false;
}
}
//Slog.i(TAG, "Animating brightess " + curIntValue + ": " + mask);
setLightBrightness(mask, curIntValue);
animating = more;
if (!more) {
if (mask == SCREEN_BRIGHT_BIT && curIntValue == Power.BRIGHTNESS_OFF) {
screenOffFinishedAnimatingLocked(mScreenOffReason);
}
}
return more;
}
}
private class LightAnimator implements Runnable {
public void run() {
synchronized (mLocks) {
long now = SystemClock.uptimeMillis();
boolean more = mScreenBrightness.stepLocked();
if (mKeyboardBrightness.stepLocked()) {
more = true;
}
if (mButtonBrightness.stepLocked()) {
more = true;
}
if (more) {
mHandler.postAtTime(mLightAnimator, now+(1000/60));
}
}
}
}
private int getPreferredBrightness() {
try {
if (mScreenBrightnessOverride >= 0) {
return mScreenBrightnessOverride;
} else if (mLightSensorScreenBrightness >= 0 && mUseSoftwareAutoBrightness
&& mAutoBrightessEnabled) {
return mLightSensorScreenBrightness;
}
final int brightness = Settings.System.getInt(mContext.getContentResolver(),
SCREEN_BRIGHTNESS);
// Don't let applications turn the screen all the way off
return Math.max(brightness, Power.BRIGHTNESS_DIM);
} catch (SettingNotFoundException snfe) {
return Power.BRIGHTNESS_ON;
}
}
private int applyButtonState(int state) {
int brightness = -1;
if ((state & BATTERY_LOW_BIT) != 0) {
// do not override brightness if the battery is low
return state;
}
if (mButtonBrightnessOverride >= 0) {
brightness = mButtonBrightnessOverride;
} else if (mLightSensorButtonBrightness >= 0 && mUseSoftwareAutoBrightness) {
brightness = mLightSensorButtonBrightness;
}
if (brightness > 0) {
return state | BUTTON_BRIGHT_BIT;
} else if (brightness == 0) {
return state & ~BUTTON_BRIGHT_BIT;
} else {
return state;
}
}
private int applyKeyboardState(int state) {
int brightness = -1;
if ((state & BATTERY_LOW_BIT) != 0) {
// do not override brightness if the battery is low
return state;
}
if (!mKeyboardVisible) {
brightness = 0;
} else if (mButtonBrightnessOverride >= 0) {
brightness = mButtonBrightnessOverride;
} else if (mLightSensorKeyboardBrightness >= 0 && mUseSoftwareAutoBrightness) {
brightness = mLightSensorKeyboardBrightness;
}
if (brightness > 0) {
return state | KEYBOARD_BRIGHT_BIT;
} else if (brightness == 0) {
return state & ~KEYBOARD_BRIGHT_BIT;
} else {
return state;
}
}
public boolean isScreenOn() {
synchronized (mLocks) {
return (mPowerState & SCREEN_ON_BIT) != 0;
}
}
boolean isScreenBright() {
synchronized (mLocks) {
return (mPowerState & SCREEN_BRIGHT) == SCREEN_BRIGHT;
}
}
private boolean isScreenTurningOffLocked() {
return (mScreenBrightness.animating && mScreenBrightness.targetValue == 0);
}
private void forceUserActivityLocked() {
if (isScreenTurningOffLocked()) {
// cancel animation so userActivity will succeed
mScreenBrightness.animating = false;
}
boolean savedActivityAllowed = mUserActivityAllowed;
mUserActivityAllowed = true;
userActivity(SystemClock.uptimeMillis(), false);
mUserActivityAllowed = savedActivityAllowed;
}
public void userActivityWithForce(long time, boolean noChangeLights, boolean force) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
userActivity(time, -1, noChangeLights, OTHER_EVENT, force);
}
public void userActivity(long time, boolean noChangeLights) {
userActivity(time, -1, noChangeLights, OTHER_EVENT, false);
}
public void userActivity(long time, boolean noChangeLights, int eventType) {
userActivity(time, -1, noChangeLights, eventType, false);
}
public void userActivity(long time, boolean noChangeLights, int eventType, boolean force) {
userActivity(time, -1, noChangeLights, eventType, force);
}
/*
* Reset the user activity timeout to now + timeout. This overrides whatever else is going
* on with user activity. Don't use this function.
*/
public void clearUserActivityTimeout(long now, long timeout) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
Slog.i(TAG, "clearUserActivity for " + timeout + "ms from now");
userActivity(now, timeout, false, OTHER_EVENT, false);
}
private void userActivity(long time, long timeoutOverride, boolean noChangeLights,
int eventType, boolean force) {
//mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
if (((mPokey & POKE_LOCK_IGNORE_CHEEK_EVENTS) != 0)
&& (eventType == CHEEK_EVENT || eventType == TOUCH_EVENT)) {
if (false) {
Slog.d(TAG, "dropping cheek or short event mPokey=0x" + Integer.toHexString(mPokey));
}
return;
}
if (((mPokey & POKE_LOCK_IGNORE_TOUCH_AND_CHEEK_EVENTS) != 0)
&& (eventType == TOUCH_EVENT || eventType == TOUCH_UP_EVENT
|| eventType == LONG_TOUCH_EVENT || eventType == CHEEK_EVENT)) {
if (false) {
Slog.d(TAG, "dropping touch mPokey=0x" + Integer.toHexString(mPokey));
}
return;
}
if (false) {
if (((mPokey & POKE_LOCK_IGNORE_CHEEK_EVENTS) != 0)) {
Slog.d(TAG, "userActivity !!!");//, new RuntimeException());
} else {
Slog.d(TAG, "mPokey=0x" + Integer.toHexString(mPokey));
}
}
synchronized (mLocks) {
if (mSpew) {
Slog.d(TAG, "userActivity mLastEventTime=" + mLastEventTime + " time=" + time
+ " mUserActivityAllowed=" + mUserActivityAllowed
+ " mUserState=0x" + Integer.toHexString(mUserState)
+ " mWakeLockState=0x" + Integer.toHexString(mWakeLockState)
+ " mProximitySensorActive=" + mProximitySensorActive
+ " force=" + force);
}
// ignore user activity if we are in the process of turning off the screen
if (isScreenTurningOffLocked()) {
Slog.d(TAG, "ignoring user activity while turning off screen");
return;
}
// Disable proximity sensor if if user presses power key while we are in the
// "waiting for proximity sensor to go negative" state.
if (mProximitySensorActive && mProximityWakeLockCount == 0) {
mProximitySensorActive = false;
}
if (mLastEventTime <= time || force) {
mLastEventTime = time;
if ((mUserActivityAllowed && !mProximitySensorActive) || force) {
// Only turn on button backlights if a button was pressed
// and auto brightness is disabled
if (eventType == BUTTON_EVENT && !mUseSoftwareAutoBrightness) {
mUserState = (mKeyboardVisible ? ALL_BRIGHT : SCREEN_BUTTON_BRIGHT);
} else {
// don't clear button/keyboard backlights when the screen is touched.
mUserState |= SCREEN_BRIGHT;
}
int uid = Binder.getCallingUid();
long ident = Binder.clearCallingIdentity();
try {
mBatteryStats.noteUserActivity(uid, eventType);
} catch (RemoteException e) {
// Ignore
} finally {
Binder.restoreCallingIdentity(ident);
}
mWakeLockState = mLocks.reactivateScreenLocksLocked();
setPowerState(mUserState | mWakeLockState, noChangeLights,
WindowManagerPolicy.OFF_BECAUSE_OF_USER);
setTimeoutLocked(time, timeoutOverride, SCREEN_BRIGHT);
}
}
}
if (mPolicy != null) {
mPolicy.userActivity();
}
}
private int getAutoBrightnessValue(int sensorValue, int[] values) {
try {
int i;
for (i = 0; i < mAutoBrightnessLevels.length; i++) {
if (sensorValue < mAutoBrightnessLevels[i]) {
break;
}
}
return values[i];
} catch (Exception e) {
// guard against null pointer or index out of bounds errors
Slog.e(TAG, "getAutoBrightnessValue", e);
return 255;
}
}
private Runnable mProximityTask = new Runnable() {
public void run() {
synchronized (mLocks) {
if (mProximityPendingValue != -1) {
proximityChangedLocked(mProximityPendingValue == 1);
mProximityPendingValue = -1;
}
if (mProximityPartialLock.isHeld()) {
mProximityPartialLock.release();
}
}
}
};
private Runnable mAutoBrightnessTask = new Runnable() {
public void run() {
synchronized (mLocks) {
int value = (int)mLightSensorPendingValue;
if (value >= 0) {
mLightSensorPendingValue = -1;
lightSensorChangedLocked(value);
}
}
}
};
private void dockStateChanged(int state) {
synchronized (mLocks) {
mIsDocked = (state != Intent.EXTRA_DOCK_STATE_UNDOCKED);
if (mIsDocked) {
mHighestLightSensorValue = -1;
}
if ((mPowerState & SCREEN_ON_BIT) != 0) {
// force lights recalculation
int value = (int)mLightSensorValue;
mLightSensorValue = -1;
lightSensorChangedLocked(value);
}
}
}
private void lightSensorChangedLocked(int value) {
if (mDebugLightSensor) {
Slog.d(TAG, "lightSensorChangedLocked " + value);
}
// do not allow light sensor value to decrease
if (mHighestLightSensorValue < value) {
mHighestLightSensorValue = value;
}
if (mLightSensorValue != value) {
mLightSensorValue = value;
if ((mPowerState & BATTERY_LOW_BIT) == 0) {
// use maximum light sensor value seen since screen went on for LCD to avoid flicker
// we only do this if we are undocked, since lighting should be stable when
// stationary in a dock.
int lcdValue = getAutoBrightnessValue(
(mIsDocked ? value : mHighestLightSensorValue),
mLcdBacklightValues);
int buttonValue = getAutoBrightnessValue(value, mButtonBacklightValues);
int keyboardValue;
if (mKeyboardVisible) {
keyboardValue = getAutoBrightnessValue(value, mKeyboardBacklightValues);
} else {
keyboardValue = 0;
}
mLightSensorScreenBrightness = lcdValue;
mLightSensorButtonBrightness = buttonValue;
mLightSensorKeyboardBrightness = keyboardValue;
if (mDebugLightSensor) {
Slog.d(TAG, "lcdValue " + lcdValue);
Slog.d(TAG, "buttonValue " + buttonValue);
Slog.d(TAG, "keyboardValue " + keyboardValue);
}
boolean startAnimation = false;
if (mAutoBrightessEnabled && mScreenBrightnessOverride < 0) {
if (ANIMATE_SCREEN_LIGHTS) {
if (mScreenBrightness.setTargetLocked(lcdValue,
AUTOBRIGHTNESS_ANIM_STEPS, INITIAL_SCREEN_BRIGHTNESS,
(int)mScreenBrightness.curValue)) {
startAnimation = true;
}
} else {
int brightnessMode = (mAutoBrightessEnabled
? LightsService.BRIGHTNESS_MODE_SENSOR
: LightsService.BRIGHTNESS_MODE_USER);
mLcdLight.setBrightness(lcdValue, brightnessMode);
}
}
if (mButtonBrightnessOverride < 0) {
if (ANIMATE_BUTTON_LIGHTS) {
if (mButtonBrightness.setTargetLocked(buttonValue,
AUTOBRIGHTNESS_ANIM_STEPS, INITIAL_BUTTON_BRIGHTNESS,
(int)mButtonBrightness.curValue)) {
startAnimation = true;
}
} else {
mButtonLight.setBrightness(buttonValue);
}
}
if (mButtonBrightnessOverride < 0 || !mKeyboardVisible) {
if (ANIMATE_KEYBOARD_LIGHTS) {
if (mKeyboardBrightness.setTargetLocked(keyboardValue,
AUTOBRIGHTNESS_ANIM_STEPS, INITIAL_BUTTON_BRIGHTNESS,
(int)mKeyboardBrightness.curValue)) {
startAnimation = true;
}
} else {
mKeyboardLight.setBrightness(keyboardValue);
}
}
if (startAnimation) {
if (mDebugLightSensor) {
Slog.i(TAG, "lightSensorChangedLocked scheduling light animator");
}
mHandler.removeCallbacks(mLightAnimator);
mHandler.post(mLightAnimator);
}
}
}
}
/**
* The user requested that we go to sleep (probably with the power button).
* This overrides all wake locks that are held.
*/
public void goToSleep(long time)
{
goToSleepWithReason(time, WindowManagerPolicy.OFF_BECAUSE_OF_USER);
}
/**
* The user requested that we go to sleep (probably with the power button).
* This overrides all wake locks that are held.
*/
public void goToSleepWithReason(long time, int reason)
{
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
synchronized (mLocks) {
goToSleepLocked(time, reason);
}
}
/**
* Reboot the device immediately, passing 'reason' (may be null)
* to the underlying __reboot system call. Should not return.
*/
public void reboot(String reason)
{
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.REBOOT, null);
if (mHandler == null || !ActivityManagerNative.isSystemReady()) {
throw new IllegalStateException("Too early to call reboot()");
}
final String finalReason = reason;
Runnable runnable = new Runnable() {
public void run() {
synchronized (this) {
ShutdownThread.reboot(mContext, finalReason, false);
}
}
};
// ShutdownThread must run on a looper capable of displaying the UI.
mHandler.post(runnable);
// PowerManager.reboot() is documented not to return so just wait for the inevitable.
synchronized (runnable) {
while (true) {
try {
runnable.wait();
} catch (InterruptedException e) {
}
}
}
}
/**
* Crash the runtime (causing a complete restart of the Android framework).
* Requires REBOOT permission. Mostly for testing. Should not return.
*/
public void crash(final String message)
{
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.REBOOT, null);
Thread t = new Thread("PowerManagerService.crash()") {
public void run() { throw new RuntimeException(message); }
};
try {
t.start();
t.join();
} catch (InterruptedException e) {
Log.wtf(TAG, e);
}
}
private void goToSleepLocked(long time, int reason) {
if (mLastEventTime <= time) {
mLastEventTime = time;
// cancel all of the wake locks
mWakeLockState = SCREEN_OFF;
int N = mLocks.size();
int numCleared = 0;
for (int i=0; i<N; i++) {
WakeLock wl = mLocks.get(i);
if (isScreenLock(wl.flags)) {
mLocks.get(i).activated = false;
numCleared++;
}
}
EventLog.writeEvent(EventLogTags.POWER_SLEEP_REQUESTED, numCleared);
mStillNeedSleepNotification = true;
mUserState = SCREEN_OFF;
setPowerState(SCREEN_OFF, false, reason);
cancelTimerLocked();
}
}
public long timeSinceScreenOn() {
synchronized (mLocks) {
if ((mPowerState & SCREEN_ON_BIT) != 0) {
return 0;
}
return SystemClock.elapsedRealtime() - mScreenOffTime;
}
}
public void setKeyboardVisibility(boolean visible) {
synchronized (mLocks) {
if (mSpew) {
Slog.d(TAG, "setKeyboardVisibility: " + visible);
}
if (mKeyboardVisible != visible) {
mKeyboardVisible = visible;
// don't signal user activity if the screen is off; other code
// will take care of turning on due to a true change to the lid
// switch and synchronized with the lock screen.
if ((mPowerState & SCREEN_ON_BIT) != 0) {
if (mUseSoftwareAutoBrightness) {
// force recompute of backlight values
if (mLightSensorValue >= 0) {
int value = (int)mLightSensorValue;
mLightSensorValue = -1;
lightSensorChangedLocked(value);
}
}
userActivity(SystemClock.uptimeMillis(), false, BUTTON_EVENT, true);
}
}
}
}
/**
* When the keyguard is up, it manages the power state, and userActivity doesn't do anything.
* When disabling user activity we also reset user power state so the keyguard can reset its
* short screen timeout when keyguard is unhidden.
*/
public void enableUserActivity(boolean enabled) {
if (mSpew) {
Slog.d(TAG, "enableUserActivity " + enabled);
}
synchronized (mLocks) {
mUserActivityAllowed = enabled;
if (!enabled) {
// cancel timeout and clear mUserState so the keyguard can set a short timeout
setTimeoutLocked(SystemClock.uptimeMillis(), 0);
}
}
}
private void setScreenBrightnessMode(int mode) {
boolean enabled = (mode == SCREEN_BRIGHTNESS_MODE_AUTOMATIC);
if (mUseSoftwareAutoBrightness && mAutoBrightessEnabled != enabled) {
mAutoBrightessEnabled = enabled;
if (isScreenOn()) {
// force recompute of backlight values
if (mLightSensorValue >= 0) {
int value = (int)mLightSensorValue;
mLightSensorValue = -1;
lightSensorChangedLocked(value);
}
}
}
}
/** Sets the screen off timeouts:
* mKeylightDelay
* mDimDelay
* mScreenOffDelay
* */
private void setScreenOffTimeoutsLocked() {
if ((mPokey & POKE_LOCK_SHORT_TIMEOUT) != 0) {
mKeylightDelay = mShortKeylightDelay; // Configurable via secure settings
mDimDelay = -1;
mScreenOffDelay = 0;
} else if ((mPokey & POKE_LOCK_MEDIUM_TIMEOUT) != 0) {
mKeylightDelay = MEDIUM_KEYLIGHT_DELAY;
mDimDelay = -1;
mScreenOffDelay = 0;
} else {
int totalDelay = mScreenOffTimeoutSetting;
if (totalDelay > mMaximumScreenOffTimeout) {
totalDelay = mMaximumScreenOffTimeout;
}
mKeylightDelay = LONG_KEYLIGHT_DELAY;
if (totalDelay < 0) {
mScreenOffDelay = Integer.MAX_VALUE;
} else if (mKeylightDelay < totalDelay) {
// subtract the time that the keylight delay. This will give us the
// remainder of the time that we need to sleep to get the accurate
// screen off timeout.
mScreenOffDelay = totalDelay - mKeylightDelay;
} else {
mScreenOffDelay = 0;
}
if (mDimScreen && totalDelay >= (LONG_KEYLIGHT_DELAY + LONG_DIM_TIME)) {
mDimDelay = mScreenOffDelay - LONG_DIM_TIME;
mScreenOffDelay = LONG_DIM_TIME;
} else {
mDimDelay = -1;
}
}
if (mSpew) {
Slog.d(TAG, "setScreenOffTimeouts mKeylightDelay=" + mKeylightDelay
+ " mDimDelay=" + mDimDelay + " mScreenOffDelay=" + mScreenOffDelay
+ " mDimScreen=" + mDimScreen);
}
}
/**
* Refreshes cached secure settings. Called once on startup, and
* on subsequent changes to secure settings.
*/
private void updateSettingsValues() {
mShortKeylightDelay = Settings.Secure.getInt(
mContext.getContentResolver(),
Settings.Secure.SHORT_KEYLIGHT_DELAY_MS,
SHORT_KEYLIGHT_DELAY_DEFAULT);
// Slog.i(TAG, "updateSettingsValues(): mShortKeylightDelay now " + mShortKeylightDelay);
}
private class LockList extends ArrayList<WakeLock>
{
void addLock(WakeLock wl)
{
int index = getIndex(wl.binder);
if (index < 0) {
this.add(wl);
}
}
WakeLock removeLock(IBinder binder)
{
int index = getIndex(binder);
if (index >= 0) {
return this.remove(index);
} else {
return null;
}
}
int getIndex(IBinder binder)
{
int N = this.size();
for (int i=0; i<N; i++) {
if (this.get(i).binder == binder) {
return i;
}
}
return -1;
}
int gatherState()
{
int result = 0;
int N = this.size();
for (int i=0; i<N; i++) {
WakeLock wl = this.get(i);
if (wl.activated) {
if (isScreenLock(wl.flags)) {
result |= wl.minState;
}
}
}
return result;
}
int reactivateScreenLocksLocked()
{
int result = 0;
int N = this.size();
for (int i=0; i<N; i++) {
WakeLock wl = this.get(i);
if (isScreenLock(wl.flags)) {
wl.activated = true;
result |= wl.minState;
}
}
return result;
}
}
void setPolicy(WindowManagerPolicy p) {
synchronized (mLocks) {
mPolicy = p;
mLocks.notifyAll();
}
}
WindowManagerPolicy getPolicyLocked() {
while (mPolicy == null || !mDoneBooting) {
try {
mLocks.wait();
} catch (InterruptedException e) {
// Ignore
}
}
return mPolicy;
}
void systemReady() {
mSensorManager = new SensorManager(mHandlerThread.getLooper());
mProximitySensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
// don't bother with the light sensor if auto brightness is handled in hardware
if (mUseSoftwareAutoBrightness) {
mLightSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
enableLightSensor(true);
}
// wait until sensors are enabled before turning on screen.
// some devices will not activate the light sensor properly on boot
// unless we do this.
if (mUseSoftwareAutoBrightness) {
// turn the screen on
setPowerState(SCREEN_BRIGHT);
} else {
// turn everything on
setPowerState(ALL_BRIGHT);
}
synchronized (mLocks) {
Slog.d(TAG, "system ready!");
mDoneBooting = true;
long identity = Binder.clearCallingIdentity();
try {
mBatteryStats.noteScreenBrightness(getPreferredBrightness());
mBatteryStats.noteScreenOn();
} catch (RemoteException e) {
// Nothing interesting to do.
} finally {
Binder.restoreCallingIdentity(identity);
}
}
}
void bootCompleted() {
Slog.d(TAG, "bootCompleted");
synchronized (mLocks) {
mBootCompleted = true;
userActivity(SystemClock.uptimeMillis(), false, BUTTON_EVENT, true);
updateWakeLockLocked();
mLocks.notifyAll();
}
}
public void monitor() {
synchronized (mLocks) { }
}
public int getSupportedWakeLockFlags() {
int result = PowerManager.PARTIAL_WAKE_LOCK
| PowerManager.FULL_WAKE_LOCK
| PowerManager.SCREEN_DIM_WAKE_LOCK;
if (mProximitySensor != null) {
result |= PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK;
}
return result;
}
public void setBacklightBrightness(int brightness) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
// Don't let applications turn the screen all the way off
brightness = Math.max(brightness, Power.BRIGHTNESS_DIM);
mLcdLight.setBrightness(brightness);
mKeyboardLight.setBrightness(mKeyboardVisible ? brightness : 0);
mButtonLight.setBrightness(brightness);
long identity = Binder.clearCallingIdentity();
try {
mBatteryStats.noteScreenBrightness(brightness);
} catch (RemoteException e) {
Slog.w(TAG, "RemoteException calling noteScreenBrightness on BatteryStatsService", e);
} finally {
Binder.restoreCallingIdentity(identity);
}
// update our animation state
if (ANIMATE_SCREEN_LIGHTS) {
mScreenBrightness.curValue = brightness;
mScreenBrightness.animating = false;
mScreenBrightness.targetValue = -1;
}
if (ANIMATE_KEYBOARD_LIGHTS) {
mKeyboardBrightness.curValue = brightness;
mKeyboardBrightness.animating = false;
mKeyboardBrightness.targetValue = -1;
}
if (ANIMATE_BUTTON_LIGHTS) {
mButtonBrightness.curValue = brightness;
mButtonBrightness.animating = false;
mButtonBrightness.targetValue = -1;
}
}
public void setAttentionLight(boolean on, int color) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
mAttentionLight.setFlashing(color, LightsService.LIGHT_FLASH_HARDWARE, (on ? 3 : 0), 0);
}
private void enableProximityLockLocked() {
if (mDebugProximitySensor) {
Slog.d(TAG, "enableProximityLockLocked");
}
if (!mProximitySensorEnabled) {
// clear calling identity so sensor manager battery stats are accurate
long identity = Binder.clearCallingIdentity();
try {
mSensorManager.registerListener(mProximityListener, mProximitySensor,
SensorManager.SENSOR_DELAY_NORMAL);
mProximitySensorEnabled = true;
} finally {
Binder.restoreCallingIdentity(identity);
}
}
}
private void disableProximityLockLocked() {
if (mDebugProximitySensor) {
Slog.d(TAG, "disableProximityLockLocked");
}
if (mProximitySensorEnabled) {
// clear calling identity so sensor manager battery stats are accurate
long identity = Binder.clearCallingIdentity();
try {
mSensorManager.unregisterListener(mProximityListener);
mHandler.removeCallbacks(mProximityTask);
if (mProximityPartialLock.isHeld()) {
mProximityPartialLock.release();
}
mProximitySensorEnabled = false;
} finally {
Binder.restoreCallingIdentity(identity);
}
if (mProximitySensorActive) {
mProximitySensorActive = false;
forceUserActivityLocked();
}
}
}
private void proximityChangedLocked(boolean active) {
if (mDebugProximitySensor) {
Slog.d(TAG, "proximityChangedLocked, active: " + active);
}
if (!mProximitySensorEnabled) {
Slog.d(TAG, "Ignoring proximity change after sensor is disabled");
return;
}
if (active) {
goToSleepLocked(SystemClock.uptimeMillis(),
WindowManagerPolicy.OFF_BECAUSE_OF_PROX_SENSOR);
mProximitySensorActive = true;
} else {
// proximity sensor negative events trigger as user activity.
// temporarily set mUserActivityAllowed to true so this will work
// even when the keyguard is on.
mProximitySensorActive = false;
forceUserActivityLocked();
if (mProximityWakeLockCount == 0) {
// disable sensor if we have no listeners left after proximity negative
disableProximityLockLocked();
}
}
}
private void enableLightSensor(boolean enable) {
if (mDebugLightSensor) {
Slog.d(TAG, "enableLightSensor " + enable);
}
if (mSensorManager != null && mLightSensorEnabled != enable) {
mLightSensorEnabled = enable;
// clear calling identity so sensor manager battery stats are accurate
long identity = Binder.clearCallingIdentity();
try {
if (enable) {
mSensorManager.registerListener(mLightListener, mLightSensor,
SensorManager.SENSOR_DELAY_NORMAL);
} else {
mSensorManager.unregisterListener(mLightListener);
mHandler.removeCallbacks(mAutoBrightnessTask);
}
} finally {
Binder.restoreCallingIdentity(identity);
}
}
}
SensorEventListener mProximityListener = new SensorEventListener() {
public void onSensorChanged(SensorEvent event) {
long milliseconds = SystemClock.elapsedRealtime();
synchronized (mLocks) {
float distance = event.values[0];
long timeSinceLastEvent = milliseconds - mLastProximityEventTime;
mLastProximityEventTime = milliseconds;
mHandler.removeCallbacks(mProximityTask);
boolean proximityTaskQueued = false;
// compare against getMaximumRange to support sensors that only return 0 or 1
boolean active = (distance >= 0.0 && distance < PROXIMITY_THRESHOLD &&
distance < mProximitySensor.getMaximumRange());
if (mDebugProximitySensor) {
Slog.d(TAG, "mProximityListener.onSensorChanged active: " + active);
}
if (timeSinceLastEvent < PROXIMITY_SENSOR_DELAY) {
// enforce delaying atleast PROXIMITY_SENSOR_DELAY before processing
mProximityPendingValue = (active ? 1 : 0);
mHandler.postDelayed(mProximityTask, PROXIMITY_SENSOR_DELAY - timeSinceLastEvent);
proximityTaskQueued = true;
} else {
// process the value immediately
mProximityPendingValue = -1;
proximityChangedLocked(active);
}
// update mProximityPartialLock state
boolean held = mProximityPartialLock.isHeld();
if (!held && proximityTaskQueued) {
// hold wakelock until mProximityTask runs
mProximityPartialLock.acquire();
} else if (held && !proximityTaskQueued) {
mProximityPartialLock.release();
}
}
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// ignore
}
};
SensorEventListener mLightListener = new SensorEventListener() {
public void onSensorChanged(SensorEvent event) {
synchronized (mLocks) {
// ignore light sensor while screen is turning off
if (isScreenTurningOffLocked()) {
return;
}
int value = (int)event.values[0];
long milliseconds = SystemClock.elapsedRealtime();
if (mDebugLightSensor) {
Slog.d(TAG, "onSensorChanged: light value: " + value);
}
mHandler.removeCallbacks(mAutoBrightnessTask);
if (mLightSensorValue != value) {
if (mLightSensorValue == -1 ||
milliseconds < mLastScreenOnTime + mLightSensorWarmupTime) {
// process the value immediately if screen has just turned on
lightSensorChangedLocked(value);
} else {
// delay processing to debounce the sensor
mLightSensorPendingValue = value;
mHandler.postDelayed(mAutoBrightnessTask, LIGHT_SENSOR_DELAY);
}
} else {
mLightSensorPendingValue = -1;
}
}
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// ignore
}
};
}