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PowerManager: Add proximity sensor support.

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Add new wakelock flag PROXIMITY_SCREEN_OFF_WAKE_LOCK.
If you create a wakelock with this flag, while the wakelock is acquired,
the screen will turn off automatically when the sensor detects an object close to the screen.
Removing the object will cause the screen to wake up again.

Added PowerManager.getSupportedWakeLockFlags(), which can be used to determine
if proximity screen off wakelocks are supported by the hardware.

Signed-off-by: Mike Lockwood <lockwood@android.com>
This commit is contained in:
Mike Lockwood
2009-07-27 13:50:57 -07:00
parent b3c82efb47
commit bc706a03a2
3 changed files with 107 additions and 4 deletions
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67
services/java/com/android/server/PowerManagerService.java
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@@ -29,6 +29,10 @@ import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
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.Handler;
@@ -58,7 +62,8 @@ import java.util.HashMap;
import java.util.Observable;
import java.util.Observer;
class PowerManagerService extends IPowerManager.Stub implements LocalPowerManager, Watchdog.Monitor {
class PowerManagerService extends IPowerManager.Stub
implements LocalPowerManager,Watchdog.Monitor, SensorEventListener {
private static final String TAG = "PowerManagerService";
static final String PARTIAL_NAME = "PowerManagerService";
@@ -72,7 +77,8 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
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.FULL_WAKE_LOCK
| PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK;
// time since last state: time since last event:
// The short keylight delay comes from Gservices; this is the default.
@@ -138,6 +144,7 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
private int[] mBroadcastQueue = new int[] { -1, -1, -1 };
private int[] mBroadcastWhy = new int[3];
private int mPartialCount = 0;
private int mProximityCount = 0;
private int mPowerState;
private boolean mOffBecauseOfUser;
private int mUserState;
@@ -175,6 +182,8 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
private IActivityManager mActivityService;
private IBatteryStats mBatteryStats;
private BatteryService mBatteryService;
private SensorManager mSensorManager;
private Sensor mProximitySensor;
private boolean mDimScreen = true;
private long mNextTimeout;
private volatile int mPokey = 0;
@@ -536,6 +545,7 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
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
@@ -583,6 +593,11 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
}
}
Power.acquireWakeLock(Power.PARTIAL_WAKE_LOCK,PARTIAL_NAME);
} else if ((flags & LOCK_MASK) == PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK) {
mProximityCount++;
if (mProximityCount == 1) {
enableProximityLockLocked();
}
}
if (newlock) {
acquireUid = wl.uid;
@@ -639,6 +654,11 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
if (LOG_PARTIAL_WL) EventLog.writeEvent(LOG_POWER_PARTIAL_WAKE_STATE, 0, wl.tag);
Power.releaseWakeLock(PARTIAL_NAME);
}
} else if ((wl.flags & LOCK_MASK) == PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK) {
mProximityCount--;
if (mProximityCount == 0) {
disableProximityLockLocked();
}
}
// Unlink the lock from the binder.
wl.binder.unlinkToDeath(wl, 0);
@@ -1996,4 +2016,47 @@ class PowerManagerService extends IPowerManager.Stub implements LocalPowerManage
public void monitor() {
synchronized (mLocks) { }
}
public int getSupportedWakeLockFlags() {
int result = PowerManager.PARTIAL_WAKE_LOCK
| PowerManager.FULL_WAKE_LOCK
| PowerManager.SCREEN_DIM_WAKE_LOCK;
// call getSensorManager() to make sure mProximitySensor is initialized
getSensorManager();
if (mProximitySensor != null) {
result |= PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK;
}
return result;
}
private SensorManager getSensorManager() {
if (mSensorManager == null) {
mSensorManager = new SensorManager(mHandlerThread.getLooper());
mProximitySensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
}
return mSensorManager;
}
private void enableProximityLockLocked() {
mSensorManager.registerListener(this, mProximitySensor, SensorManager.SENSOR_DELAY_NORMAL);
}
private void disableProximityLockLocked() {
mSensorManager.unregisterListener(this);
}
public void onSensorChanged(SensorEvent event) {
long milliseconds = event.timestamp / 1000000;
if (event.values[0] == 0.0) {
goToSleep(milliseconds);
} else {
userActivity(milliseconds, false);
}
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// ignore
}
}