Clamp manual brightness on high brightness mode devices. (4db91e1e) · Commits · e / os / android_frameworks_base

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

+8 −18

Original line number	Diff line number	Diff line
		@@ -46,7 +46,6 @@ import com.android.internal.annotations.VisibleForTesting;
		import com.android.internal.display.BrightnessSynchronizer;
		import com.android.internal.os.BackgroundThread;
		import com.android.server.EventLogTags;
		import com.android.server.display.DisplayDeviceConfig.HighBrightnessModeData;

		import java.io.PrintWriter;

		@@ -220,12 +219,14 @@ class AutomaticBrightnessController {
		float dozeScaleFactor, int lightSensorRate, int initialLightSensorRate,
		long brighteningLightDebounceConfig, long darkeningLightDebounceConfig,
		boolean resetAmbientLuxAfterWarmUpConfig, HysteresisLevels ambientBrightnessThresholds,
		HysteresisLevels screenBrightnessThresholds, LogicalDisplay display, Context context) {
		HysteresisLevels screenBrightnessThresholds, LogicalDisplay display, Context context,
		HighBrightnessModeController hbmController) {
		this(new Injector(), callbacks, looper, sensorManager, lightSensor, mapper,
		lightSensorWarmUpTime, brightnessMin, brightnessMax, dozeScaleFactor,
		lightSensorRate, initialLightSensorRate, brighteningLightDebounceConfig,
		darkeningLightDebounceConfig, resetAmbientLuxAfterWarmUpConfig,
		ambientBrightnessThresholds, screenBrightnessThresholds, display, context
		ambientBrightnessThresholds, screenBrightnessThresholds, display, context,
		hbmController
		);
		}

		@@ -236,7 +237,8 @@ class AutomaticBrightnessController {
		float dozeScaleFactor, int lightSensorRate, int initialLightSensorRate,
		long brighteningLightDebounceConfig, long darkeningLightDebounceConfig,
		boolean resetAmbientLuxAfterWarmUpConfig, HysteresisLevels ambientBrightnessThresholds,
		HysteresisLevels screenBrightnessThresholds, LogicalDisplay display, Context context) {
		HysteresisLevels screenBrightnessThresholds, LogicalDisplay display, Context context,
		HighBrightnessModeController hbmController) {
		mInjector = injector;
		mContext = context;
		mCallbacks = callbacks;
		@@ -273,20 +275,7 @@ class AutomaticBrightnessController {
		mPendingForegroundAppPackageName = null;
		mForegroundAppCategory = ApplicationInfo.CATEGORY_UNDEFINED;
		mPendingForegroundAppCategory = ApplicationInfo.CATEGORY_UNDEFINED;

		final DisplayDeviceConfig ddConfig =
		display.getPrimaryDisplayDeviceLocked().getDisplayDeviceConfig();
		HighBrightnessModeData hbmData =
		ddConfig != null ? ddConfig.getHighBrightnessModeData() : null;

		final Runnable hbmChangeCallback = () -> {
		updateAutoBrightness(true /sendUpdate/, false /userInitiatedChange/);
		// TODO: b/175937645 - Callback to DisplayManagerService to indicate a change to the HBM
		// allowance has been made so that the brightness limits can be calculated
		// appropriately.
		};
		mHbmController = new HighBrightnessModeController(mHandler, brightnessMin, brightnessMax,
		hbmData, hbmChangeCallback);
		mHbmController = hbmController;
		}

		/**
		@@ -327,6 +316,7 @@ class AutomaticBrightnessController {
		public void configure(boolean enable, @Nullable BrightnessConfiguration configuration,
		float brightness, boolean userChangedBrightness, float adjustment,
		boolean userChangedAutoBrightnessAdjustment, int displayPolicy) {
		mHbmController.setAutoBrightnessEnabled(enable);
		// While dozing, the application processor may be suspended which will prevent us from
		// receiving new information from the light sensor. On some devices, we may be able to
		// switch to a wake-up light sensor instead but for now we will simply disable the sensor

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

+42 −12

Original line number	Diff line number	Diff line
		@@ -350,12 +350,15 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		private final ColorDisplayServiceInternal mCdsi;
		private final float[] mNitsRange;

		private final HighBrightnessModeController mHbmController;

		// A record of state for skipping brightness ramps.
		private int mSkipRampState = RAMP_STATE_SKIP_NONE;

		// The first autobrightness value set when entering RAMP_STATE_SKIP_INITIAL.
		private float mInitialAutoBrightness;


		// The controller for the automatic brightness level.
		private AutomaticBrightnessController mAutomaticBrightnessController;

		@@ -433,6 +436,7 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		mBlanker = blanker;
		mContext = context;


		PowerManager pm = context.getSystemService(PowerManager.class);

		final Resources resources = context.getResources();
		@@ -476,6 +480,8 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		mSkipScreenOnBrightnessRamp = resources.getBoolean(
		com.android.internal.R.bool.config_skipScreenOnBrightnessRamp);

		mHbmController = createHbmController();

		if (mUseSoftwareAutoBrightnessConfig) {
		final float dozeScaleFactor = resources.getFraction(
		com.android.internal.R.fraction.config_screenAutoBrightnessDozeScaleFactor,
		@@ -535,7 +541,7 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		PowerManager.BRIGHTNESS_MAX, dozeScaleFactor, lightSensorRate,
		initialLightSensorRate, brighteningLightDebounce, darkeningLightDebounce,
		autoBrightnessResetAmbientLuxAfterWarmUp, ambientBrightnessThresholds,
		screenBrightnessThresholds, logicalDisplay, context);
		screenBrightnessThresholds, logicalDisplay, context, mHbmController);
		} else {
		mUseSoftwareAutoBrightnessConfig = false;
		}
		@@ -1080,6 +1086,8 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		mBrightnessTracker.setBrightnessConfiguration(mBrightnessConfiguration);
		}

		boolean updateScreenBrightnessSetting = false;

		// Apply auto-brightness.
		boolean slowChange = false;
		if (Float.isNaN(brightnessState)) {
		@@ -1096,11 +1104,7 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		if (mAppliedAutoBrightness && !autoBrightnessAdjustmentChanged) {
		slowChange = true; // slowly adapt to auto-brightness
		}
		// Tell the rest of the system about the new brightness. Note that we do this
		// before applying the low power or dim transformations so that the slider
		// accurately represents the full possible range, even if they range changes what
		// it means in absolute terms.
		putScreenBrightnessSetting(brightnessState);
		updateScreenBrightnessSetting = true;
		mAppliedAutoBrightness = true;
		mBrightnessReasonTemp.setReason(BrightnessReason.REASON_AUTOMATIC);
		} else {
		@@ -1118,6 +1122,7 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		mAppliedAutoBrightness = false;
		brightnessAdjustmentFlags = 0;
		}

		// Use default brightness when dozing unless overridden.
		if ((Float.isNaN(brightnessState))
		&& Display.isDozeState(state)) {
		@@ -1128,9 +1133,24 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		// Apply manual brightness.
		if (Float.isNaN(brightnessState)) {
		brightnessState = clampScreenBrightness(mCurrentScreenBrightnessSetting);
		if (brightnessState != mCurrentScreenBrightnessSetting) {
		// The manually chosen screen brightness is outside of the currently allowed
		// range (i.e., high-brightness-mode), make sure we tell the rest of the system
		// by updating the setting.
		updateScreenBrightnessSetting = true;
		}
		mBrightnessReasonTemp.setReason(BrightnessReason.REASON_MANUAL);
		}

		if (updateScreenBrightnessSetting) {
		// Tell the rest of the system about the new brightness in case we had to change it
		// for things like auto-brightness or high-brightness-mode. Note that we do this
		// before applying the low power or dim transformations so that the slider
		// accurately represents the full possible range, even if they range changes what
		// it means in absolute terms.
		putScreenBrightnessSetting(brightnessState);
		}

		// Apply dimming by at least some minimum amount when user activity
		// timeout is about to expire.
		if (mPowerRequest.policy == DisplayPowerRequest.POLICY_DIM) {
		@@ -1208,9 +1228,10 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		// animate to. To avoid this, we check the value first.
		// If the brightnessState is off (-1.0f) we still want to animate to the minimum
		// brightness (0.0f) to accommodate for LED displays, which can appear bright to the
		// user even when the display is all black.
		float animateValue = brightnessState == PowerManager.BRIGHTNESS_OFF_FLOAT
		? PowerManager.BRIGHTNESS_MIN : brightnessState;
		// user even when the display is all black. We also clamp here in case some
		// transformations to the brightness have pushed it outside of the currently
		// allowed range.
		float animateValue = clampScreenBrightness(brightnessState);
		final float currentBrightness = mPowerState.getScreenBrightness();
		if (isValidBrightnessValue(animateValue)
		&& !BrightnessSynchronizer.floatEquals(animateValue, currentBrightness)) {
		@@ -1353,6 +1374,15 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
		msg.sendToTarget();
		}

		private HighBrightnessModeController createHbmController() {
		final DisplayDeviceConfig ddConfig =
		mLogicalDisplay.getPrimaryDisplayDeviceLocked().getDisplayDeviceConfig();
		final DisplayDeviceConfig.HighBrightnessModeData hbmData =
		ddConfig != null ? ddConfig.getHighBrightnessModeData() : null;
		return new HighBrightnessModeController(mHandler, PowerManager.BRIGHTNESS_MIN,
		PowerManager.BRIGHTNESS_MAX, hbmData, () -> sendUpdatePowerStateLocked());
		}

		private void blockScreenOn() {
		if (mPendingScreenOnUnblocker == null) {
		Trace.asyncTraceBegin(Trace.TRACE_TAG_POWER, SCREEN_ON_BLOCKED_TRACE_NAME, 0);
		@@ -1468,10 +1498,10 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call

		private float clampScreenBrightness(float value) {
		if (Float.isNaN(value)) {
		return PowerManager.BRIGHTNESS_MIN;
		value = PowerManager.BRIGHTNESS_MIN;
		}
		return MathUtils.constrain(
		value, PowerManager.BRIGHTNESS_MIN, PowerManager.BRIGHTNESS_MAX);
		return MathUtils.constrain(value,
		mHbmController.getCurrentBrightnessMin(), mHbmController.getCurrentBrightnessMax());
		}

		// Checks whether the brightness is within the valid brightness range, not including the off or

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

+19 −7

Original line number	Diff line number	Diff line
		@@ -37,7 +37,7 @@ import java.util.LinkedList;
		class HighBrightnessModeController {
		private static final String TAG = "HighBrightnessModeController";

		private static final boolean DEBUG_HBM = false;
		private static final boolean DEBUG = false;

		private final float mBrightnessMin;
		private final float mBrightnessMax;
		@@ -48,6 +48,7 @@ class HighBrightnessModeController {

		private boolean mIsInAllowedAmbientRange = false;
		private boolean mIsTimeAvailable = false;
		private boolean mIsAutoBrightnessEnabled = false;
		private float mAutoBrightness;

		/**
		@@ -84,6 +85,17 @@ class HighBrightnessModeController {
		};
		}

		void setAutoBrightnessEnabled(boolean isEnabled) {
		if (isEnabled == mIsAutoBrightnessEnabled) {
		return;
		}
		if (DEBUG) {
		Slog.d(TAG, "setAutoBrightness( " + isEnabled + " )");
		}
		mIsAutoBrightnessEnabled = isEnabled;
		mIsInAllowedAmbientRange = false; // reset when auto-brightness switches
		}

		float getCurrentBrightnessMin() {
		return mBrightnessMin;
		}
		@@ -102,7 +114,7 @@ class HighBrightnessModeController {
		}

		void onAmbientLuxChange(float ambientLux) {
		if (!deviceSupportsHbm()) {
		if (!deviceSupportsHbm() \|\| !mIsAutoBrightnessEnabled) {
		return;
		}

		@@ -132,7 +144,7 @@ class HighBrightnessModeController {
		mEvents.addFirst(new HbmEvent(mRunningStartTimeMillis, currentTime));
		mRunningStartTimeMillis = -1;

		if (DEBUG_HBM) {
		if (DEBUG) {
		Slog.d(TAG, "New HBM event: " + mEvents.getFirst());
		}
		}
		@@ -142,7 +154,7 @@ class HighBrightnessModeController {
		}

		private boolean isCurrentlyAllowed() {
		return mIsTimeAvailable && mIsInAllowedAmbientRange;
		return mIsAutoBrightnessEnabled && mIsTimeAvailable && mIsInAllowedAmbientRange;
		}

		private boolean deviceSupportsHbm() {
		@@ -167,7 +179,7 @@ class HighBrightnessModeController {
		timeAlreadyUsed = currentTime - mRunningStartTimeMillis;
		}

		if (DEBUG_HBM) {
		if (DEBUG) {
		Slog.d(TAG, "Time already used after current session: " + timeAlreadyUsed);
		}

		@@ -187,7 +199,7 @@ class HighBrightnessModeController {
		timeAlreadyUsed += event.endTimeMillis - startTimeMillis;
		}

		if (DEBUG_HBM) {
		if (DEBUG) {
		Slog.d(TAG, "Time already used after all sessions: " + timeAlreadyUsed);
		}

		@@ -220,7 +232,7 @@ class HighBrightnessModeController {
		nextTimeout = timeWhenMinIsGainedBack;
		}

		if (DEBUG_HBM) {
		if (DEBUG) {
		Slog.d(TAG, "HBM recalculated. IsAllowedWithoutRestrictions: "
		+ isAllowedWithoutRestrictions
		+ ", isOnlyAllowedToStayOn: " + isOnlyAllowedToStayOn

services/tests/servicestests/src/com/android/server/display/AutomaticBrightnessControllerTest.java

+3 −1

Original line number	Diff line number	Diff line
		@@ -65,6 +65,7 @@ public class AutomaticBrightnessControllerTest {
		@Mock HysteresisLevels mScreenBrightnessThresholds;
		@Mock Handler mNoOpHandler;
		@Mock DisplayDevice mDisplayDevice;
		@Mock HighBrightnessModeController mHbmController;

		private static final int LIGHT_SENSOR_WARMUP_TIME = 0;
		@Before
		@@ -90,7 +91,8 @@ public class AutomaticBrightnessControllerTest {
		BRIGHTNESS_MAX_FLOAT, DOZE_SCALE_FACTOR, LIGHT_SENSOR_RATE,
		INITIAL_LIGHT_SENSOR_RATE, BRIGHTENING_LIGHT_DEBOUNCE_CONFIG,
		DARKENING_LIGHT_DEBOUNCE_CONFIG, RESET_AMBIENT_LUX_AFTER_WARMUP_CONFIG,
		mAmbientBrightnessThresholds, mScreenBrightnessThresholds, mLogicalDisplay, mContext
		mAmbientBrightnessThresholds, mScreenBrightnessThresholds, mLogicalDisplay,
		mContext, mHbmController
		);
		controller.setLoggingEnabled(true);