[power-throttling] Fine tune algorithm (c65d8403) · Commits · e / os / android_frameworks_base

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

+23 −8

Original line number	Diff line number	Diff line
		@@ -150,7 +150,9 @@ import javax.xml.datatype.DatatypeConfigurationException;
		* <screenBrightnessDefault>0.65</screenBrightnessDefault>
		* <powerThrottlingConfig>
		* <brightnessLowestCapAllowed>0.1</brightnessLowestCapAllowed>
		* <pollingWindowMillis>15</pollingWindowMillis>
		* <customAnimationRateSec>0.004</customAnimationRateSec>
		* <pollingWindowMaxMillis>30000</pollingWindowMaxMillis>
		* <pollingWindowMinMillis>10000</pollingWindowMinMillis>
		* <powerThrottlingMap>
		* <powerThrottlingPoint>
		* <thermalStatus>severe</thermalStatus>
		@@ -2184,9 +2186,13 @@ public class DisplayDeviceConfig {
		return;
		}
		float lowestBrightnessCap = powerThrottlingCfg.getBrightnessLowestCapAllowed().floatValue();
		int pollingWindowMillis = powerThrottlingCfg.getPollingWindowMillis().intValue();
		float customAnimationRateSec = powerThrottlingCfg.getCustomAnimationRateSec().floatValue();
		int pollingWindowMaxMillis = powerThrottlingCfg.getPollingWindowMaxMillis().intValue();
		int pollingWindowMinMillis = powerThrottlingCfg.getPollingWindowMinMillis().intValue();
		mPowerThrottlingConfigData = new PowerThrottlingConfigData(lowestBrightnessCap,
		pollingWindowMillis);
		customAnimationRateSec,
		pollingWindowMaxMillis,
		pollingWindowMinMillis);
		}

		private void loadRefreshRateSetting(DisplayConfiguration config) {
		@@ -2980,12 +2986,19 @@ public class DisplayDeviceConfig {
		public static class PowerThrottlingConfigData {
		/** Lowest brightness cap allowed for this device. */
		public final float brightnessLowestCapAllowed;
		/** Time window for polling power in seconds. */
		public final int pollingWindowMillis;
		/** Time take to animate brightness in seconds. */
		public final float customAnimationRateSec;
		/** Time window for maximum polling power in milliseconds. */
		public final int pollingWindowMaxMillis;
		/** Time window for minimum polling power in milliseconds. */
		public final int pollingWindowMinMillis;
		public PowerThrottlingConfigData(float brightnessLowestCapAllowed,
		int pollingWindowMillis) {
		float customAnimationRateSec, int pollingWindowMaxMillis,
		int pollingWindowMinMillis) {
		this.brightnessLowestCapAllowed = brightnessLowestCapAllowed;
		this.pollingWindowMillis = pollingWindowMillis;
		this.customAnimationRateSec = customAnimationRateSec;
		this.pollingWindowMaxMillis = pollingWindowMaxMillis;
		this.pollingWindowMinMillis = pollingWindowMinMillis;
		}

		@Override
		@@ -2993,7 +3006,9 @@ public class DisplayDeviceConfig {
		return "PowerThrottlingConfigData{"
		+ "brightnessLowestCapAllowed: "
		+ brightnessLowestCapAllowed
		+ ", pollingWindowMillis: " + pollingWindowMillis
		+ ", customAnimationRateSec: " + customAnimationRateSec
		+ ", pollingWindowMaxMillis: " + pollingWindowMaxMillis
		+ ", pollingWindowMinMillis: " + pollingWindowMinMillis
		+ "} ";
		}
		}

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

+4 −3

Original line number	Diff line number	Diff line
		@@ -591,7 +591,8 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		mThermalBrightnessThrottlingDataId,
		logicalDisplay.getPowerThrottlingDataIdLocked(),
		mDisplayDeviceConfig, displayDeviceInfo.width, displayDeviceInfo.height,
		displayToken, mDisplayId), mContext, flags, mSensorManager);
		displayToken, mDisplayId), mContext, flags, mSensorManager,
		mDisplayBrightnessController.getCurrentBrightness());
		// Seed the cached brightness
		saveBrightnessInfo(getScreenBrightnessSetting());
		mAutomaticBrightnessStrategy =
		@@ -3300,10 +3301,10 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		BrightnessClamperController getBrightnessClamperController(Handler handler,
		BrightnessClamperController.ClamperChangeListener clamperChangeListener,
		BrightnessClamperController.DisplayDeviceData data, Context context,
		DisplayManagerFlags flags, SensorManager sensorManager) {
		DisplayManagerFlags flags, SensorManager sensorManager, float currentBrightness) {

		return new BrightnessClamperController(handler, clamperChangeListener, data, context,
		flags, sensorManager);
		flags, sensorManager, currentBrightness);
		}

		DisplayWhiteBalanceController getDisplayWhiteBalanceController(Handler handler,

services/core/java/com/android/server/display/brightness/clamper/BrightnessClamperController.java

+30 −7

Original line number	Diff line number	Diff line
		@@ -75,10 +75,13 @@ public class BrightnessClamperController {
		private ModifiersAggregatedState mModifiersAggregatedState = new ModifiersAggregatedState();

		private final DeviceConfig.OnPropertiesChangedListener mOnPropertiesChangedListener;
		private final DisplayManagerFlags mDisplayManagerFlags;
		private float mBrightnessCap = PowerManager.BRIGHTNESS_MAX;

		private float mCustomAnimationRate = DisplayBrightnessState.CUSTOM_ANIMATION_RATE_NOT_SET;
		@Nullable
		private BrightnessPowerClamper mPowerClamper;
		@Nullable
		private Type mClamperType = null;

		private boolean mClamperApplied = false;
		@@ -93,16 +96,18 @@ public class BrightnessClamperController {

		public BrightnessClamperController(Handler handler,
		ClamperChangeListener clamperChangeListener, DisplayDeviceData data, Context context,
		DisplayManagerFlags flags, SensorManager sensorManager) {
		this(new Injector(), handler, clamperChangeListener, data, context, flags, sensorManager);
		DisplayManagerFlags flags, SensorManager sensorManager, float currentBrightness) {
		this(new Injector(), handler, clamperChangeListener, data, context, flags, sensorManager,
		currentBrightness);
		}

		@VisibleForTesting
		BrightnessClamperController(Injector injector, Handler handler,
		ClamperChangeListener clamperChangeListener, DisplayDeviceData data, Context context,
		DisplayManagerFlags flags, SensorManager sensorManager) {
		DisplayManagerFlags flags, SensorManager sensorManager, float currentBrightness) {
		mDeviceConfigParameterProvider = injector.getDeviceConfigParameterProvider();
		mHandler = handler;
		mDisplayManagerFlags = flags;
		mLightSensorController = injector.getLightSensorController(sensorManager, context,
		mLightSensorListener, mHandler);

		@@ -117,7 +122,15 @@ public class BrightnessClamperController {
		};

		mClampers = injector.getClampers(handler, clamperChangeListenerInternal, data, flags,
		context);
		context, currentBrightness);
		if (mDisplayManagerFlags.isPowerThrottlingClamperEnabled()) {
		for (BrightnessClamper clamper: mClampers) {
		if (clamper.getType() == Type.POWER) {
		mPowerClamper = (BrightnessPowerClamper) clamper;
		break;
		}
		}
		}
		mModifiers = injector.getModifiers(flags, context, handler, clamperChangeListener,
		data);

		@@ -183,6 +196,12 @@ public class BrightnessClamperController {
		mModifiers.get(i).apply(request, builder);
		}

		if (mDisplayManagerFlags.isPowerThrottlingClamperEnabled()) {
		if (mPowerClamper != null) {
		mPowerClamper.updateCurrentBrightness(cappedBrightness);
		}
		}

		return builder.build();
		}

		@@ -311,13 +330,17 @@ public class BrightnessClamperController {

		List<BrightnessClamper<? super DisplayDeviceData>> getClampers(Handler handler,
		ClamperChangeListener clamperChangeListener, DisplayDeviceData data,
		DisplayManagerFlags flags, Context context) {
		DisplayManagerFlags flags, Context context, float currentBrightness) {
		List<BrightnessClamper<? super DisplayDeviceData>> clampers = new ArrayList<>();
		clampers.add(
		new BrightnessThermalClamper(handler, clamperChangeListener, data));
		if (flags.isPowerThrottlingClamperEnabled()) {
		// Check if power-throttling config is present.
		PowerThrottlingConfigData configData = data.getPowerThrottlingConfigData();
		if (configData != null) {
		clampers.add(new BrightnessPowerClamper(handler, clamperChangeListener,
		data));
		data, currentBrightness));
		}
		}
		if (flags.isBrightnessWearBedtimeModeClamperEnabled()) {
		clampers.add(new BrightnessWearBedtimeModeClamper(handler, context,

services/core/java/com/android/server/display/brightness/clamper/BrightnessPowerClamper.java

+209 −28

Original line number	Diff line number	Diff line
		@@ -21,16 +21,23 @@ import static com.android.server.display.brightness.clamper.BrightnessClamperCon

		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.content.Context;
		import android.os.Handler;
		import android.os.IThermalEventListener;
		import android.os.IThermalService;
		import android.os.PowerManager;
		import android.os.RemoteException;
		import android.os.ServiceManager;
		import android.os.Temperature;
		import android.provider.DeviceConfigInterface;
		import android.util.Slog;

		import com.android.internal.annotations.VisibleForTesting;
		import com.android.server.display.DisplayBrightnessState;
		import com.android.server.display.DisplayDeviceConfig.PowerThrottlingConfigData;
		import com.android.server.display.DisplayDeviceConfig.PowerThrottlingData;
		import com.android.server.display.DisplayDeviceConfig.PowerThrottlingData.ThrottlingLevel;
		import com.android.server.display.brightness.BrightnessUtils;
		import com.android.server.display.feature.DeviceConfigParameterProvider;
		import com.android.server.display.utils.DeviceConfigParsingUtils;

		@@ -65,14 +72,21 @@ class BrightnessPowerClamper extends
		private PowerThrottlingData mPowerThrottlingDataActive = null;
		@Nullable
		private PowerThrottlingConfigData mPowerThrottlingConfigData = null;

		@NonNull
		private final ThermalLevelListener mThermalLevelListener;
		@NonNull
		private final PowerChangeListener mPowerChangeListener;
		private @Temperature.ThrottlingStatus int mCurrentThermalLevel = Temperature.THROTTLING_NONE;
		private boolean mCurrentThermalLevelChanged = false;
		private float mCurrentAvgPowerConsumed = 0;
		@Nullable
		private String mUniqueDisplayId = null;
		@Nullable
		private String mDataId = null;

		private float mCurrentBrightness = PowerManager.BRIGHTNESS_INVALID;
		private float mCustomAnimationRateSec = DisplayBrightnessState.CUSTOM_ANIMATION_RATE_NOT_SET;
		private float mCustomAnimationRateSecDeviceConfig =
		DisplayBrightnessState.CUSTOM_ANIMATION_RATE_NOT_SET;
		private final BiFunction<String, String, ThrottlingLevel> mDataPointMapper = (key, value) -> {
		try {
		int status = DeviceConfigParsingUtils.parseThermalStatus(key);
		@@ -88,23 +102,41 @@ class BrightnessPowerClamper extends


		BrightnessPowerClamper(Handler handler, ClamperChangeListener listener,
		PowerData powerData) {
		this(new Injector(), handler, listener, powerData);
		PowerData powerData, float currentBrightness) {
		this(new Injector(), handler, listener, powerData, currentBrightness);
		}

		@VisibleForTesting
		BrightnessPowerClamper(Injector injector, Handler handler, ClamperChangeListener listener,
		PowerData powerData) {
		PowerData powerData, float currentBrightness) {
		super(handler, listener);
		mInjector = injector;
		mConfigParameterProvider = injector.getDeviceConfigParameterProvider();
		mCurrentBrightness = currentBrightness;
		mPowerChangeListener = (powerConsumed, thermalStatus) -> {
		recalculatePowerQuotaChange(powerConsumed, thermalStatus);
		};
		mPowerThrottlingConfigData = powerData.getPowerThrottlingConfigData();
		if (mPowerThrottlingConfigData != null) {
		mCustomAnimationRateSecDeviceConfig = mPowerThrottlingConfigData.customAnimationRateSec;
		}
		mThermalLevelListener = new ThermalLevelListener(handler);
		mPmicMonitor =
		mInjector.getPmicMonitor(mPowerChangeListener,
		mThermalLevelListener.getThermalService(),
		mPowerThrottlingConfigData.pollingWindowMaxMillis,
		mPowerThrottlingConfigData.pollingWindowMinMillis);

		mConfigParameterProvider = injector.getDeviceConfigParameterProvider();
		mHandler.post(() -> {
		setDisplayData(powerData);
		loadOverrideData();
		start();
		});
		}

		@VisibleForTesting
		PowerChangeListener getPowerChangeListener() {
		return mPowerChangeListener;
		}

		@Override
		@@ -113,6 +145,11 @@ class BrightnessPowerClamper extends
		return Type.POWER;
		}

		@Override
		float getCustomAnimationRate() {
		return mCustomAnimationRateSec;
		}

		@Override
		void onDeviceConfigChanged() {
		mHandler.post(() -> {
		@@ -134,6 +171,9 @@ class BrightnessPowerClamper extends
		if (mPmicMonitor != null) {
		mPmicMonitor.shutdown();
		}
		if (mThermalLevelListener != null) {
		mThermalLevelListener.stop();
		}
		}

		/**
		@@ -144,11 +184,20 @@ class BrightnessPowerClamper extends
		pw.println(" mCurrentAvgPowerConsumed=" + mCurrentAvgPowerConsumed);
		pw.println(" mUniqueDisplayId=" + mUniqueDisplayId);
		pw.println(" mCurrentThermalLevel=" + mCurrentThermalLevel);
		pw.println(" mCurrentThermalLevelChanged=" + mCurrentThermalLevelChanged);
		pw.println(" mPowerThrottlingDataFromDDC=" + (mPowerThrottlingDataFromDDC == null ? "null"
		: mPowerThrottlingDataFromDDC.toString()));
		mThermalLevelListener.dump(pw);
		super.dump(pw);
		}

		/**
		* Updates current brightness, for power calculations.
		*/
		public void updateCurrentBrightness(float currentBrightness) {
		mCurrentBrightness = currentBrightness;
		}

		private void recalculateActiveData() {
		if (mUniqueDisplayId == null \|\| mDataId == null) {
		return;
		@@ -156,17 +205,11 @@ class BrightnessPowerClamper extends
		mPowerThrottlingDataActive = mPowerThrottlingDataOverride
		.getOrDefault(mUniqueDisplayId, Map.of()).getOrDefault(mDataId,
		mPowerThrottlingDataFromDDC);
		if (mPowerThrottlingDataActive != null) {
		if (mPmicMonitor != null) {
		mPmicMonitor.stop();
		mPmicMonitor.start();
		}
		} else {
		if (mPowerThrottlingDataActive == null) {
		if (mPmicMonitor != null) {
		mPmicMonitor.stop();
		}
		}
		recalculateBrightnessCap();
		}

		private void loadOverrideData() {
		@@ -198,21 +241,57 @@ class BrightnessPowerClamper extends
		if (mPowerThrottlingDataActive == null) {
		return;
		}
		if (powerQuota > 0 && mCurrentAvgPowerConsumed > powerQuota) {
		if (powerQuota > 0) {
		if (BrightnessUtils.isValidBrightnessValue(mCurrentBrightness)
		&& (mCurrentAvgPowerConsumed > powerQuota)) {
		isActive = true;
		// calculate new brightness Cap.
		// Brightness has a linear relation to power-consumed.
		targetBrightnessCap =
		(powerQuota / mCurrentAvgPowerConsumed) * PowerManager.BRIGHTNESS_MAX;
		(powerQuota / mCurrentAvgPowerConsumed) * mCurrentBrightness;
		} else if (mCurrentThermalLevelChanged) {
		if (mCurrentThermalLevel == Temperature.THROTTLING_NONE) {
		// reset pmic and remove the power-throttling cap.
		isActive = true;
		targetBrightnessCap = PowerManager.BRIGHTNESS_MAX;
		mPmicMonitor.stop();
		} else {
		isActive = true;
		// Since the thermal status has changed, we need to remove power-throttling cap.
		// Instead of recalculating and changing brightness again, adding flicker,
		// we will wait for the next pmic cycle to re-evaluate this value
		// make act on it, if needed.
		targetBrightnessCap = PowerManager.BRIGHTNESS_MAX;
		if (mPmicMonitor.isStopped()) {
		mPmicMonitor.start();
		}
		}
		} else { // Current power consumed is under the quota.
		isActive = true;
		targetBrightnessCap = PowerManager.BRIGHTNESS_MAX;
		}
		}

		// Cap to lowest allowed brightness on device.
		if (mPowerThrottlingConfigData != null) {
		targetBrightnessCap = Math.max(targetBrightnessCap,
		mPowerThrottlingConfigData.brightnessLowestCapAllowed);
		}

		if (mBrightnessCap != targetBrightnessCap \|\| mIsActive != isActive) {
		mIsActive = isActive;
		Slog.i(TAG, "Power clamper changing current brightness cap mBrightnessCap: "
		+ mBrightnessCap + " to target brightness cap:" + targetBrightnessCap
		+ " for current screen brightness: " + mCurrentBrightness);
		mBrightnessCap = targetBrightnessCap;
		Slog.i(TAG, "Power clamper changed state: thermalStatus:" + mCurrentThermalLevel
		+ " mCurrentThermalLevelChanged:" + mCurrentThermalLevelChanged
		+ " mCurrentAvgPowerConsumed:" + mCurrentAvgPowerConsumed
		+ " mCustomAnimationRateSec:" + mCustomAnimationRateSecDeviceConfig);
		mCustomAnimationRateSec = mCustomAnimationRateSecDeviceConfig;
		mChangeListener.onChanged();
		} else {
		mCustomAnimationRateSec = DisplayBrightnessState.CUSTOM_ANIMATION_RATE_NOT_SET;
		}
		}

		@@ -234,6 +313,11 @@ class BrightnessPowerClamper extends

		private void recalculatePowerQuotaChange(float avgPowerConsumed, int thermalStatus) {
		mHandler.post(() -> {
		if (mCurrentThermalLevel != thermalStatus) {
		mCurrentThermalLevelChanged = true;
		} else {
		mCurrentThermalLevelChanged = false;
		}
		mCurrentThermalLevel = thermalStatus;
		mCurrentAvgPowerConsumed = avgPowerConsumed;
		recalculateBrightnessCap();
		@@ -244,14 +328,107 @@ class BrightnessPowerClamper extends
		if (mPowerThrottlingConfigData == null) {
		return;
		}
		PowerChangeListener listener = (powerConsumed, thermalStatus) -> {
		recalculatePowerQuotaChange(powerConsumed, thermalStatus);
		};
		mPmicMonitor =
		mInjector.getPmicMonitor(listener, mPowerThrottlingConfigData.pollingWindowMillis);
		if (mPowerThrottlingConfigData.pollingWindowMaxMillis
		<= mPowerThrottlingConfigData.pollingWindowMinMillis) {
		Slog.e(TAG, "Brightness power max polling window:"
		+ mPowerThrottlingConfigData.pollingWindowMaxMillis
		+ " msec, should be greater than brightness min polling window:"
		+ mPowerThrottlingConfigData.pollingWindowMinMillis + " msec.");
		return;
		}
		if ((mPowerThrottlingConfigData.pollingWindowMaxMillis
		% mPowerThrottlingConfigData.pollingWindowMinMillis) != 0) {
		Slog.e(TAG, "Brightness power max polling window:"
		+ mPowerThrottlingConfigData.pollingWindowMaxMillis
		+ " msec, is not divisible by brightness min polling window:"
		+ mPowerThrottlingConfigData.pollingWindowMinMillis + " msec.");
		return;
		}
		mCustomAnimationRateSecDeviceConfig = mPowerThrottlingConfigData.customAnimationRateSec;
		mThermalLevelListener.start();
		}

		private void activatePmicMonitor() {
		if (!mPmicMonitor.isStopped()) {
		return;
		}
		mPmicMonitor.start();
		}

		private void deactivatePmicMonitor(@Temperature.ThrottlingStatus int status) {
		if (status != Temperature.THROTTLING_NONE) {
		return;
		}
		if (mPmicMonitor.isStopped()) {
		return;
		}
		mPmicMonitor.stop();
		}

		private final class ThermalLevelListener extends IThermalEventListener.Stub {
		private final Handler mHandler;
		private IThermalService mThermalService;
		private boolean mStarted;

		ThermalLevelListener(Handler handler) {
		mHandler = handler;
		mStarted = false;
		mThermalService = IThermalService.Stub.asInterface(
		ServiceManager.getService(Context.THERMAL_SERVICE));
		}

		IThermalService getThermalService() {
		return mThermalService;
		}

		void start() {
		if (mStarted) {
		return;
		}
		if (mThermalService == null) {
		return;
		}
		try {
		// TODO b/279114539 Try DISPLAY first and then fallback to SKIN.
		mThermalService.registerThermalEventListenerWithType(this, Temperature.TYPE_SKIN);
		mStarted = true;
		} catch (RemoteException e) {
		Slog.e(TAG, "Failed to register thermal status listener", e);
		}
		}

		@Override
		public void notifyThrottling(Temperature temp) {
		@Temperature.ThrottlingStatus int status = temp.getStatus();
		if (status >= Temperature.THROTTLING_LIGHT) {
		Slog.d(TAG, "Activating pmic monitor due to thermal state:" + status);
		mHandler.post(() -> activatePmicMonitor());
		} else {
		if (!mPmicMonitor.isStopped()) {
		mHandler.post(() -> deactivatePmicMonitor(status));
		}
		}
		}

		void stop() {
		if (!mStarted) {
		return;
		}
		try {
		mThermalService.unregisterThermalEventListener(this);
		mStarted = false;
		} catch (RemoteException e) {
		Slog.e(TAG, "Failed to unregister thermal status listener", e);
		}
		mThermalService = null;
		}

		void dump(PrintWriter writer) {
		writer.println(" ThermalLevelObserver:");
		writer.println(" mStarted: " + mStarted);
		}
		}

		public interface PowerData {
		@NonNull
		String getUniqueDisplayId();
		@@ -279,8 +456,12 @@ class BrightnessPowerClamper extends

		@VisibleForTesting
		static class Injector {
		PmicMonitor getPmicMonitor(PowerChangeListener listener, int pollingTime) {
		return new PmicMonitor(listener, pollingTime);
		PmicMonitor getPmicMonitor(PowerChangeListener powerChangeListener,
		IThermalService thermalService,
		int pollingMaxTimeMillis,
		int pollingMinTimeMillis) {
		return new PmicMonitor(powerChangeListener, thermalService, pollingMaxTimeMillis,
		pollingMinTimeMillis);
		}

		DeviceConfigParameterProvider getDeviceConfigParameterProvider() {

services/core/java/com/android/server/display/brightness/clamper/PmicMonitor.java

+54 −19

File changed.

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