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Do not apply light sensor debounce logic while the light sensor is still warming up.

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This allows us to adjust immediately when we receive a correct light sensor reading
after the screen turns on.

Change-Id: I627047365640761727348e577c9164a6d6be2772
Signed-off-by: Mike Lockwood <lockwood@android.com>
This commit is contained in:
Mike Lockwood
2009-11-07 20:33:47 -05:00
parent 638d865352
commit 20ee6f2dd3
2 changed files with 29 additions and 11 deletions
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35
services/java/com/android/server/PowerManagerService.java
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@@ -212,8 +212,12 @@ class PowerManagerService extends IPowerManager.Stub
private volatile boolean mPokeAwakeOnSet = false;
private volatile boolean mInitComplete = false;
private HashMap<IBinder,PokeLock> mPokeLocks = new HashMap<IBinder,PokeLock>();
// mScreenOnTime and mScreenOnStartTime are used for computing total time screen
// has been on since boot
private long mScreenOnTime;
private long mScreenOnStartTime;
// mLastScreenOnTime is the time the screen was last turned on
private long mLastScreenOnTime;
private boolean mPreventScreenOn;
private int mScreenBrightnessOverride = -1;
private boolean mUseSoftwareAutoBrightness;
@@ -222,6 +226,7 @@ class PowerManagerService extends IPowerManager.Stub
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;
@@ -456,6 +461,8 @@ class PowerManagerService extends IPowerManager.Stub
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();
@@ -886,6 +893,7 @@ class PowerManagerService extends IPowerManager.Stub
pw.println(" mPreventScreenOn=" + mPreventScreenOn
+ " mScreenBrightnessOverride=" + mScreenBrightnessOverride);
pw.println(" mTotalDelaySetting=" + mTotalDelaySetting);
pw.println(" mLastScreenOnTime=" + mLastScreenOnTime);
pw.println(" mBroadcastWakeLock=" + mBroadcastWakeLock);
pw.println(" mStayOnWhilePluggedInScreenDimLock=" + mStayOnWhilePluggedInScreenDimLock);
pw.println(" mStayOnWhilePluggedInPartialLock=" + mStayOnWhilePluggedInPartialLock);
@@ -1299,15 +1307,18 @@ class PowerManagerService extends IPowerManager.Stub
private int setScreenStateLocked(boolean on) {
int err = Power.setScreenState(on);
if (err == 0 && mUseSoftwareAutoBrightness) {
enableLightSensor(on);
if (!on) {
// make sure button and key backlights are off too
mHardware.setLightBrightness_UNCHECKED(HardwareService.LIGHT_ID_BUTTONS, 0);
mHardware.setLightBrightness_UNCHECKED(HardwareService.LIGHT_ID_KEYBOARD, 0);
// clear current value so we will update based on the new conditions
// when the sensor is reenabled.
mLightSensorValue = -1;
if (err == 0) {
mLastScreenOnTime = (on ? SystemClock.elapsedRealtime() : 0);
if (mUseSoftwareAutoBrightness) {
enableLightSensor(on);
if (!on) {
// make sure button and key backlights are off too
mHardware.setLightBrightness_UNCHECKED(HardwareService.LIGHT_ID_BUTTONS, 0);
mHardware.setLightBrightness_UNCHECKED(HardwareService.LIGHT_ID_KEYBOARD, 0);
// clear current value so we will update based on the new conditions
// when the sensor is reenabled.
mLightSensorValue = -1;
}
}
}
return err;
@@ -2431,13 +2442,15 @@ class PowerManagerService extends IPowerManager.Stub
public void onSensorChanged(SensorEvent event) {
synchronized (mLocks) {
int value = (int)event.values[0];
long milliseconds = event.timestamp / 1000000;
if (mDebugLightSensor) {
Log.d(TAG, "onSensorChanged: light value: " + value);
}
mHandler.removeCallbacks(mAutoBrightnessTask);
if (mLightSensorValue != value) {
if (mLightSensorValue == -1) {
// process the value immediately
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