Merge "Specify refresh rate limits for sensors in config." into sc-dev am: fa51515513 (08ed0246) · Commits · e / os / android_frameworks_base

core/java/android/hardware/display/DisplayManagerInternal.java

+86 −0

Original line number	Diff line number	Diff line
		@@ -22,12 +22,15 @@ import android.hardware.SensorManager;
		import android.os.Handler;
		import android.os.PowerManager;
		import android.util.IntArray;
		import android.util.Slog;
		import android.util.SparseArray;
		import android.view.Display;
		import android.view.DisplayInfo;
		import android.view.SurfaceControl;
		import android.view.SurfaceControl.Transaction;

		import java.util.Objects;

		/**
		* Display manager local system service interface.
		*
		@@ -292,6 +295,23 @@ public abstract class DisplayManagerInternal {
		@DisplayManager.SwitchingType
		public abstract int getRefreshRateSwitchingType();

		/**
		* Return the refresh rate restriction for the specified display and sensor pairing. If the
		* specified sensor is identified as an associated sensor in the specified display's
		* display-device-config file, then return any refresh rate restrictions that it might specify.
		* If no restriction is specified, or the sensor is not associated with the display, then null
		* will be returned.
		*
		* @param displayId The display to check against.
		* @param name The name of the sensor.
		* @param type The type of sensor.
		*
		* @return The min/max refresh-rate restriction as a {@link Pair} of floats, or null if not
		* restricted.
		*/
		public abstract RefreshRateRange getRefreshRateForDisplayAndSensor(
		int displayId, String name, String type);

		/**
		* Describes the requested power state of the display.
		*
		@@ -527,4 +547,70 @@ public abstract class DisplayManagerInternal {
		*/
		void onDisplayGroupChanged(int groupId);
		}

		/**
		* Information about the min and max refresh rate DM would like to set the display to.
		*/
		public static final class RefreshRateRange {
		public static final String TAG = "RefreshRateRange";

		// The tolerance within which we consider something approximately equals.
		public static final float FLOAT_TOLERANCE = 0.01f;

		/**
		* The lowest desired refresh rate.
		*/
		public float min;

		/**
		* The highest desired refresh rate.
		*/
		public float max;

		public RefreshRateRange() {}

		public RefreshRateRange(float min, float max) {
		if (min < 0 \|\| max < 0 \|\| min > max + FLOAT_TOLERANCE) {
		Slog.e(TAG, "Wrong values for min and max when initializing RefreshRateRange : "
		+ min + " " + max);
		this.min = this.max = 0;
		return;
		}
		if (min > max) {
		// Min and max are within epsilon of each other, but in the wrong order.
		float t = min;
		min = max;
		max = t;
		}
		this.min = min;
		this.max = max;
		}

		/**
		* Checks whether the two objects have the same values.
		*/
		@Override
		public boolean equals(Object other) {
		if (other == this) {
		return true;
		}

		if (!(other instanceof RefreshRateRange)) {
		return false;
		}

		RefreshRateRange refreshRateRange = (RefreshRateRange) other;
		return (min == refreshRateRange.min && max == refreshRateRange.max);
		}

		@Override
		public int hashCode() {
		return Objects.hash(min, max);
		}

		@Override
		public String toString() {
		return "(" + min + " " + max + ")";
		}
		}
		}

services/core/java/com/android/server/display/DisplayDeviceConfig.java

+46 −14

Original line number	Diff line number	Diff line
		@@ -21,6 +21,7 @@ import android.content.Context;
		import android.content.res.Resources;
		import android.os.Environment;
		import android.os.PowerManager;
		import android.text.TextUtils;
		import android.util.MathUtils;
		import android.util.Slog;
		import android.util.Spline;
		@@ -34,6 +35,7 @@ import com.android.server.display.config.HbmTiming;
		import com.android.server.display.config.HighBrightnessMode;
		import com.android.server.display.config.NitsMap;
		import com.android.server.display.config.Point;
		import com.android.server.display.config.RefreshRateRange;
		import com.android.server.display.config.SensorDetails;
		import com.android.server.display.config.XmlParser;

		@@ -79,10 +81,10 @@ public class DisplayDeviceConfig {
		private final Context mContext;

		// The details of the ambient light sensor associated with this display.
		private final SensorIdentifier mAmbientLightSensor = new SensorIdentifier();
		private final SensorData mAmbientLightSensor = new SensorData();

		// The details of the proximity sensor associated with this display.
		private final SensorIdentifier mProximitySensor = new SensorIdentifier();
		private final SensorData mProximitySensor = new SensorData();

		// Nits and backlight values that are loaded from either the display device config file, or
		// config.xml. These are the raw values and just used for the dumpsys
		@@ -113,6 +115,7 @@ public class DisplayDeviceConfig {
		private List<String> mQuirks;
		private boolean mIsHighBrightnessModeEnabled = false;
		private HighBrightnessModeData mHbmData;
		private String mLoadedFrom = null;

		private DisplayDeviceConfig(Context context) {
		mContext = context;
		@@ -273,11 +276,11 @@ public class DisplayDeviceConfig {
		return mBrightnessRampSlowIncrease;
		}

		SensorIdentifier getAmbientLightSensor() {
		SensorData getAmbientLightSensor() {
		return mAmbientLightSensor;
		}

		SensorIdentifier getProximitySensor() {
		SensorData getProximitySensor() {
		return mProximitySensor;
		}

		@@ -306,7 +309,8 @@ public class DisplayDeviceConfig {
		@Override
		public String toString() {
		String str = "DisplayDeviceConfig{"
		+ "mBacklight=" + Arrays.toString(mBacklight)
		+ "mLoadedFrom=" + mLoadedFrom
		+ ", mBacklight=" + Arrays.toString(mBacklight)
		+ ", mNits=" + Arrays.toString(mNits)
		+ ", mRawBacklight=" + Arrays.toString(mRawBacklight)
		+ ", mRawNits=" + Arrays.toString(mRawNits)
		@@ -336,9 +340,8 @@ public class DisplayDeviceConfig {
		final String filename = String.format(CONFIG_FILE_FORMAT, suffix);
		final File filePath = Environment.buildPath(
		baseDirectory, ETC_DIR, DISPLAY_CONFIG_DIR, filename);
		if (filePath.exists()) {
		final DisplayDeviceConfig config = new DisplayDeviceConfig(context);
		config.initFromFile(filePath);
		if (config.initFromFile(filePath)) {
		return config;
		}
		return null;
		@@ -356,15 +359,15 @@ public class DisplayDeviceConfig {
		return config;
		}

		private void initFromFile(File configFile) {
		private boolean initFromFile(File configFile) {
		if (!configFile.exists()) {
		// Display configuration files aren't required to exist.
		return;
		return false;
		}

		if (!configFile.isFile()) {
		Slog.e(TAG, "Display configuration is not a file: " + configFile + ", skipping");
		return;
		return false;
		}

		try (InputStream in = new BufferedInputStream(new FileInputStream(configFile))) {
		@@ -385,6 +388,8 @@ public class DisplayDeviceConfig {
		Slog.e(TAG, "Encountered an error while reading/parsing display config file: "
		+ configFile, e);
		}
		mLoadedFrom = configFile.toString();
		return true;
		}

		private void initFromGlobalXml() {
		@@ -395,10 +400,12 @@ public class DisplayDeviceConfig {
		loadBrightnessRampsFromConfigXml();
		loadAmbientLightSensorFromConfigXml();
		setProxSensorUnspecified();
		mLoadedFrom = "<config.xml>";
		}

		private void initFromDefaultValues() {
		// Set all to basic values
		mLoadedFrom = "Static values";
		mBacklightMinimum = PowerManager.BRIGHTNESS_MIN;
		mBacklightMaximum = PowerManager.BRIGHTNESS_MAX;
		mBrightnessDefault = BRIGHTNESS_DEFAULT;
		@@ -689,6 +696,11 @@ public class DisplayDeviceConfig {
		if (sensorDetails != null) {
		mAmbientLightSensor.type = sensorDetails.getType();
		mAmbientLightSensor.name = sensorDetails.getName();
		final RefreshRateRange rr = sensorDetails.getRefreshRate();
		if (rr != null) {
		mAmbientLightSensor.minRefreshRate = rr.getMinimum().floatValue();
		mAmbientLightSensor.maxRefreshRate = rr.getMaximum().floatValue();
		}
		} else {
		loadAmbientLightSensorFromConfigXml();
		}
		@@ -704,22 +716,42 @@ public class DisplayDeviceConfig {
		if (sensorDetails != null) {
		mProximitySensor.name = sensorDetails.getName();
		mProximitySensor.type = sensorDetails.getType();
		final RefreshRateRange rr = sensorDetails.getRefreshRate();
		if (rr != null) {
		mProximitySensor.minRefreshRate = rr.getMinimum().floatValue();
		mProximitySensor.maxRefreshRate = rr.getMaximum().floatValue();
		}
		} else {
		setProxSensorUnspecified();
		}
		}

		static class SensorIdentifier {
		static class SensorData {
		public String type;
		public String name;
		public float minRefreshRate = 0.0f;
		public float maxRefreshRate = Float.POSITIVE_INFINITY;

		@Override
		public String toString() {
		return "Sensor{"
		+ "type: \"" + type + "\""
		+ ", name: \"" + name + "\""
		+ "type: " + type
		+ ", name: " + name
		+ ", refreshRateRange: [" + minRefreshRate + ", " + maxRefreshRate + "]"
		+ "} ";
		}

		/**
		* @return True if the sensor matches both the specified name and type, or one if only
		* one is specified (not-empty). Always returns false if both parameters are null or empty.
		*/
		public boolean matches(String sensorName, String sensorType) {
		final boolean isNameSpecified = !TextUtils.isEmpty(sensorName);
		final boolean isTypeSpecified = !TextUtils.isEmpty(sensorType);
		return (isNameSpecified \|\| isTypeSpecified)
		&& (!isNameSpecified \|\| sensorName.equals(name))
		&& (!isTypeSpecified \|\| sensorType.equals(type));
		}
		}

		/**

services/core/java/com/android/server/display/DisplayManagerService.java

+38 −0

Original line number	Diff line number	Diff line
		@@ -50,6 +50,7 @@ import android.content.res.TypedArray;
		import android.database.ContentObserver;
		import android.graphics.ColorSpace;
		import android.graphics.Point;
		import android.hardware.Sensor;
		import android.hardware.SensorManager;
		import android.hardware.devicestate.DeviceStateManager;
		import android.hardware.display.AmbientBrightnessDayStats;
		@@ -62,6 +63,7 @@ import android.hardware.display.DisplayManagerGlobal;
		import android.hardware.display.DisplayManagerInternal;
		import android.hardware.display.DisplayManagerInternal.DisplayGroupListener;
		import android.hardware.display.DisplayManagerInternal.DisplayTransactionListener;
		import android.hardware.display.DisplayManagerInternal.RefreshRateRange;
		import android.hardware.display.DisplayViewport;
		import android.hardware.display.DisplayedContentSample;
		import android.hardware.display.DisplayedContentSamplingAttributes;
		@@ -119,6 +121,8 @@ import com.android.server.DisplayThread;
		import com.android.server.LocalServices;
		import com.android.server.SystemService;
		import com.android.server.UiThread;
		import com.android.server.display.DisplayDeviceConfig.SensorData;
		import com.android.server.display.utils.SensorUtils;
		import com.android.server.wm.SurfaceAnimationThread;
		import com.android.server.wm.WindowManagerInternal;

		@@ -3257,6 +3261,40 @@ public final class DisplayManagerService extends SystemService {
		public int getRefreshRateSwitchingType() {
		return getRefreshRateSwitchingTypeInternal();
		}

		@Override
		public RefreshRateRange getRefreshRateForDisplayAndSensor(int displayId, String sensorName,
		String sensorType) {
		final SensorManager sensorManager;
		synchronized (mSyncRoot) {
		sensorManager = mSensorManager;
		}
		if (sensorManager == null) {
		return null;
		}

		// Verify that the specified sensor exists.
		final Sensor sensor = SensorUtils.findSensor(sensorManager, sensorType, sensorName,
		SensorUtils.NO_FALLBACK);
		if (sensor == null) {
		return null;
		}

		synchronized (mSyncRoot) {
		final LogicalDisplay display = mLogicalDisplayMapper.getDisplayLocked(displayId);
		final DisplayDevice device = display.getPrimaryDisplayDeviceLocked();
		if (device == null) {
		return null;
		}
		final DisplayDeviceConfig config = device.getDisplayDeviceConfig();
		SensorData sensorData = config.getProximitySensor();
		if (sensorData.matches(sensorName, sensorType)) {
		return new RefreshRateRange(sensorData.minRefreshRate,
		sensorData.maxRefreshRate);
		}
		}
		return null;
		}
		}

		class DesiredDisplayModeSpecsObserver

services/core/java/com/android/server/display/DisplayModeDirector.java

+79 −63

Original line number	Diff line number	Diff line
		@@ -27,6 +27,8 @@ import android.hardware.SensorEvent;
		import android.hardware.SensorEventListener;
		import android.hardware.SensorManager;
		import android.hardware.display.DisplayManager;
		import android.hardware.display.DisplayManagerInternal;
		import android.hardware.display.DisplayManagerInternal.RefreshRateRange;
		import android.hardware.fingerprint.IUdfpsHbmListener;
		import android.net.Uri;
		import android.os.Handler;
		@@ -51,6 +53,8 @@ import com.android.internal.os.BackgroundThread;
		import com.android.server.LocalServices;
		import com.android.server.display.utils.AmbientFilter;
		import com.android.server.display.utils.AmbientFilterFactory;
		import com.android.server.sensors.SensorManagerInternal;
		import com.android.server.sensors.SensorManagerInternal.ProximityActiveListener;
		import com.android.server.statusbar.StatusBarManagerInternal;
		import com.android.server.utils.DeviceConfigInterface;

		@@ -85,8 +89,7 @@ public class DisplayModeDirector {

		private static final int INVALID_DISPLAY_MODE_ID = -1;

		// The tolerance within which we consider something approximately equals.
		private static final float FLOAT_TOLERANCE = 0.01f;
		private static final float FLOAT_TOLERANCE = RefreshRateRange.FLOAT_TOLERANCE;

		private final Object mLock = new Object();
		private final Context mContext;
		@@ -98,6 +101,7 @@ public class DisplayModeDirector {
		private final SettingsObserver mSettingsObserver;
		private final DisplayObserver mDisplayObserver;
		private final UdfpsObserver mUdfpsObserver;
		private final SensorObserver mSensorObserver;
		private final DeviceConfigInterface mDeviceConfig;
		private final DeviceConfigDisplaySettings mDeviceConfigDisplaySettings;

		@@ -139,6 +143,11 @@ public class DisplayModeDirector {
		mDisplayObserver = new DisplayObserver(context, handler);
		mBrightnessObserver = new BrightnessObserver(context, handler);
		mUdfpsObserver = new UdfpsObserver();
		mSensorObserver = new SensorObserver(context, (displayId, priority, vote) -> {
		synchronized (mLock) {
		updateVoteLocked(displayId, priority, vote);
		}
		});
		mDeviceConfigDisplaySettings = new DeviceConfigDisplaySettings();
		mDeviceConfig = injector.getDeviceConfig();
		mAlwaysRespectAppRequest = false;
		@@ -155,6 +164,7 @@ public class DisplayModeDirector {
		mSettingsObserver.observe();
		mDisplayObserver.observe();
		mBrightnessObserver.observe(sensorManager);
		mSensorObserver.observe();
		synchronized (mLock) {
		// We may have a listener already registered before the call to start, so go ahead and
		// notify them to pick up our newly initialized state.
		@@ -585,6 +595,7 @@ public class DisplayModeDirector {
		mAppRequestObserver.dumpLocked(pw);
		mBrightnessObserver.dumpLocked(pw);
		mUdfpsObserver.dumpLocked(pw);
		mSensorObserver.dumpLocked(pw);
		}
		}

		@@ -767,66 +778,6 @@ public class DisplayModeDirector {
		}
		}

		/**
		* Information about the min and max refresh rate DM would like to set the display to.
		*/
		public static final class RefreshRateRange {
		/**
		* The lowest desired refresh rate.
		*/
		public float min;
		/**
		* The highest desired refresh rate.
		*/
		public float max;

		public RefreshRateRange() {}

		public RefreshRateRange(float min, float max) {
		if (min < 0 \|\| max < 0 \|\| min > max + FLOAT_TOLERANCE) {
		Slog.e(TAG, "Wrong values for min and max when initializing RefreshRateRange : "
		+ min + " " + max);
		this.min = this.max = 0;
		return;
		}
		if (min > max) {
		// Min and max are within epsilon of each other, but in the wrong order.
		float t = min;
		min = max;
		max = t;
		}
		this.min = min;
		this.max = max;
		}

		/**
		* Checks whether the two objects have the same values.
		*/
		@Override
		public boolean equals(Object other) {
		if (other == this) {
		return true;
		}

		if (!(other instanceof RefreshRateRange)) {
		return false;
		}

		RefreshRateRange refreshRateRange = (RefreshRateRange) other;
		return (min == refreshRateRange.min && max == refreshRateRange.max);
		}

		@Override
		public int hashCode() {
		return Objects.hash(min, max);
		}

		@Override
		public String toString() {
		return "(" + min + " " + max + ")";
		}
		}

		/**
		* Information about the desired display mode to be set by the system. Includes the base
		* mode ID and the primary and app request refresh rate ranges.
		@@ -987,9 +938,13 @@ public class DisplayModeDirector {
		// user seeing the display flickering when the switches occur.
		public static final int PRIORITY_FLICKER_REFRESH_RATE_SWITCH = 8;

		// The proximity sensor needs the refresh rate to be locked in order to function, so this is
		// set to a high priority.
		public static final int PRIORITY_PROXIMITY = 9;

		// The Under-Display Fingerprint Sensor (UDFPS) needs the refresh rate to be locked in order
		// to function, so this needs to be the highest priority of all votes.
		public static final int PRIORITY_UDFPS = 9;
		public static final int PRIORITY_UDFPS = 10;

		// Whenever a new priority is added, remember to update MIN_PRIORITY, MAX_PRIORITY, and
		// APP_REQUEST_REFRESH_RATE_RANGE_PRIORITY_CUTOFF, as well as priorityToString.
		@@ -1086,6 +1041,8 @@ public class DisplayModeDirector {
		return "PRIORITY_LOW_POWER_MODE";
		case PRIORITY_UDFPS:
		return "PRIORITY_UDFPS";
		case PRIORITY_PROXIMITY:
		return "PRIORITY_PROXIMITY";

		default:
		return Integer.toString(priority);
		@@ -2142,6 +2099,62 @@ public class DisplayModeDirector {
		}
		}

		private static class SensorObserver implements ProximityActiveListener {
		private static final String PROXIMITY_SENSOR_NAME = null;
		private static final String PROXIMITY_SENSOR_TYPE = Sensor.STRING_TYPE_PROXIMITY;

		private final BallotBox mBallotBox;
		private final Context mContext;

		private DisplayManager mDisplayManager;
		private DisplayManagerInternal mDisplayManagerInternal;
		private boolean mIsProxActive = false;

		SensorObserver(Context context, BallotBox ballotBox) {
		mContext = context;
		mBallotBox = ballotBox;
		}

		@Override
		public void onProximityActive(boolean isActive) {
		if (mIsProxActive != isActive) {
		mIsProxActive = isActive;
		recalculateVotes();
		}
		}

		public void observe() {
		mDisplayManager = mContext.getSystemService(DisplayManager.class);
		mDisplayManagerInternal = LocalServices.getService(DisplayManagerInternal.class);

		final SensorManagerInternal sensorManager =
		LocalServices.getService(SensorManagerInternal.class);
		sensorManager.addProximityActiveListener(BackgroundThread.getExecutor(), this);
		}

		private void recalculateVotes() {
		final Display[] displays = mDisplayManager.getDisplays();
		for (Display d : displays) {
		int displayId = d.getDisplayId();
		Vote vote = null;
		if (mIsProxActive) {
		final RefreshRateRange rate =
		mDisplayManagerInternal.getRefreshRateForDisplayAndSensor(
		displayId, PROXIMITY_SENSOR_NAME, PROXIMITY_SENSOR_TYPE);
		if (rate != null) {
		vote = Vote.forRefreshRates(rate.min, rate.max);
		}
		}
		mBallotBox.vote(displayId, Vote.PRIORITY_PROXIMITY, vote);
		}
		}

		void dumpLocked(PrintWriter pw) {
		pw.println(" SensorObserver");
		pw.println(" mIsProxActive=" + mIsProxActive);
		}
		}

		private class DeviceConfigDisplaySettings implements DeviceConfig.OnPropertiesChangedListener {
		public DeviceConfigDisplaySettings() {
		}
		@@ -2328,4 +2341,7 @@ public class DisplayModeDirector {
		}
		}

		interface BallotBox {
		void vote(int displayId, int priority, Vote vote);
		}
		}

services/core/java/com/android/server/display/DisplayPowerController.java

+11 −33

Original line number	Diff line number	Diff line
		@@ -48,7 +48,6 @@ import android.os.SystemProperties;
		import android.os.Trace;
		import android.os.UserHandle;
		import android.provider.Settings;
		import android.text.TextUtils;
		import android.util.Log;
		import android.util.MathUtils;
		import android.util.Slog;
		@@ -65,13 +64,13 @@ import com.android.server.am.BatteryStatsService;
		import com.android.server.display.RampAnimator.DualRampAnimator;
		import com.android.server.display.color.ColorDisplayService.ColorDisplayServiceInternal;
		import com.android.server.display.color.ColorDisplayService.ReduceBrightColorsListener;
		import com.android.server.display.utils.SensorUtils;
		import com.android.server.display.whitebalance.DisplayWhiteBalanceController;
		import com.android.server.display.whitebalance.DisplayWhiteBalanceFactory;
		import com.android.server.display.whitebalance.DisplayWhiteBalanceSettings;
		import com.android.server.policy.WindowManagerPolicy;

		import java.io.PrintWriter;
		import java.util.List;

		/**
		* Controls the power state of the display.
		@@ -586,26 +585,6 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		mBrightnessMapper.recalculateSplines(mCdsi.isReduceBrightColorsActivated(), adjustedNits);
		}

		private Sensor findSensor(String sensorType, String sensorName, int fallbackType,
		boolean useFallback) {
		final boolean isNameSpecified = !TextUtils.isEmpty(sensorName);
		final boolean isTypeSpecified = !TextUtils.isEmpty(sensorType);
		List<Sensor> sensors = mSensorManager.getSensorList(Sensor.TYPE_ALL);
		if (isNameSpecified \|\| isTypeSpecified) {
		for (Sensor sensor : sensors) {
		if ((!isNameSpecified \|\| sensorName.equals(sensor.getName()))
		&& (!isTypeSpecified \|\| sensorType.equals(sensor.getStringType()))) {
		return sensor;
		}
		}
		}
		if (useFallback) {
		return mSensorManager.getDefaultSensor(fallbackType);
		} else {
		return null;
		}
		}

		/**
		* Returns true if the proximity sensor screen-off function is available.
		*/
		@@ -1654,24 +1633,23 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		}

		private void loadAmbientLightSensor() {
		DisplayDeviceConfig.SensorIdentifier lightSensor =
		mDisplayDeviceConfig.getAmbientLightSensor();
		String lightSensorName = lightSensor.name;
		String lightSensorType = lightSensor.type;
		mLightSensor = findSensor(lightSensorType, lightSensorName, Sensor.TYPE_LIGHT,
		mDisplayId == Display.DEFAULT_DISPLAY);
		DisplayDeviceConfig.SensorData lightSensor = mDisplayDeviceConfig.getAmbientLightSensor();
		final int fallbackType = mDisplayId == Display.DEFAULT_DISPLAY
		? Sensor.TYPE_LIGHT : SensorUtils.NO_FALLBACK;
		mLightSensor = SensorUtils.findSensor(mSensorManager, lightSensor.type, lightSensor.name,
		fallbackType);
		}

		private void loadProximitySensor() {
		if (DEBUG_PRETEND_PROXIMITY_SENSOR_ABSENT) {
		return;
		}
		final DisplayDeviceConfig.SensorIdentifier proxSensor =
		final DisplayDeviceConfig.SensorData proxSensor =
		mDisplayDeviceConfig.getProximitySensor();
		final String proxSensorName = proxSensor.name;
		final String proxSensorType = proxSensor.type;
		mProximitySensor = findSensor(proxSensorType, proxSensorName, Sensor.TYPE_PROXIMITY,
		mDisplayId == Display.DEFAULT_DISPLAY);
		final int fallbackType = mDisplayId == Display.DEFAULT_DISPLAY
		? Sensor.TYPE_PROXIMITY : SensorUtils.NO_FALLBACK;
		mProximitySensor = SensorUtils.findSensor(mSensorManager, proxSensor.type, proxSensor.name,
		fallbackType);
		if (mProximitySensor != null) {
		mProximityThreshold = Math.min(mProximitySensor.getMaximumRange(),
		TYPICAL_PROXIMITY_THRESHOLD);