Android 11 显示状态与背光亮度调整_android setbrightnessconfigurationfordisplay

 Power状态更新

主要在PowerManagerService.java，根据系统状态更新下次update的时间，遍历wakelock状态更新显示状态等

一、函数updatePowerStateLocked

根据MDRTY中记录的脏位更新全局电源状态。这是执行电源状态转换的主要功能。我们将它们集中在这里，这样每当重要的事情发生变化时，我们就可以完全重新计算权力状态，并确保每次都以同样的方式进行。重点是在这里收集所有的转换逻辑。

    /**
     * Updates the global power state based on dirty bits recorded in mDirty.
     *
     * This is the main function that performs power state transitions.
     * We centralize them here so that we can recompute the power state completely
     * each time something important changes, and ensure that we do it the same
     * way each time.  The point is to gather all of the transition logic here.
     */
    private void updatePowerStateLocked() {
        if (!mSystemReady || mDirty == 0) {
            return;
        }
        if (!Thread.holdsLock(mLock)) {
            Slog.wtf(TAG, "Power manager lock was not held when calling updatePowerStateLocked");
        }
 
        Trace.traceBegin(Trace.TRACE_TAG_POWER, "updatePowerState");
        try {
            // Phase 0: Basic state updates.
            updateIsPoweredLocked(mDirty);
            updateStayOnLocked(mDirty);
            updateScreenBrightnessBoostLocked(mDirty);
 
            // Phase 1: Update wakefulness.
            // Loop because the wake lock and user activity computations are influenced
            // by changes in wakefulness.
            final long now = mClock.uptimeMillis();
            int dirtyPhase2 = 0;
            for (;;) {
                int dirtyPhase1 = mDirty;
                dirtyPhase2 |= dirtyPhase1;
                mDirty = 0;
 
                updateWakeLockSummaryLocked(dirtyPhase1);
                updateUserActivitySummaryLocked(now, dirtyPhase1);
                updateAttentiveStateLocked(now, dirtyPhase1);
                if (!updateWakefulnessLocked(dirtyPhase1)) {
                    break;
                }
            }
 
            // Phase 2: Lock profiles that became inactive/not kept awake.
            updateProfilesLocked(now);
 
            // Phase 3: Update display power state.
            final boolean displayBecameReady = updateDisplayPowerStateLocked(dirtyPhase2);
 
            // Phase 4: Update dream state (depends on display ready signal).
            updateDreamLocked(dirtyPhase2, displayBecameReady);
 
            // Phase 5: Send notifications, if needed.
            finishWakefulnessChangeIfNeededLocked();
 
            // Phase 6: Update suspend blocker.
            // Because we might release the last suspend blocker here, we need to make sure
            // we finished everything else first!
            updateSuspendBlockerLocked();
        } finally {
            Trace.traceEnd(Trace.TRACE_TAG_POWER);
        }
    }

（1）基本状态更新

a、函数updateIsPoweredLocked

有需要时更新电池状态 DIRTY_BATTERY_STATE

b、函数updateStayOnLocked

DIRTY_STAY_ON

c、函数updateScreenBrightnessBoostLocked

DIRTY_SCREEN_BRIGHTNESS_BOOST

（2）更新清醒状态

a、函数updateWakeLockSummaryLocked

更新mWakeLockSummary的值，以汇总所有活动唤醒锁的状态。请注意，当系统处于睡眠状态时，大多数唤醒锁都会被忽略。DIRTY_WAKE_LOCKS

b、函数updateUserActivitySummaryLocked

更新mUserActivitySummary的值，以总结用户请求的系统状态，例如屏幕是亮还是暗。 请注意，当系统处于睡眠状态时，用户活动将被忽略 DIRTY_USER_ACTIVITY

c、函数updateAttentiveStateLocked

d、函数updateWakefulnessLocked

该功能根据当前唤醒锁和用户活动状态决定设备是否应该开始做梦。如果清醒状态发生变化，它可能会修改MDRTY。如果唤醒状态发生变化，需要重新启动电源状态计算，则返回true

（3）锁定处于非活动状态/未保持清醒状态的配置文件。

函数updateProfilesLocked

检查配置文件超时并通知应锁定的配置文件

（4）更新显示电源状态。

函数updateDisplayPowerStateLocked

异步更新显示电源状态。更新完成后，mDisplayReady将设置为true。显示控制器会发布一条消息，告诉我们实际的显示电源状态何时已更新，所以我们回到这里再次检查并完成。此函数每次都会重新计算显示电源状态。
return True，如果显示就绪。

（5）更新梦想状态（取决于显示就绪信号）。

函数updateDreamLocked

确定是否向sandman发布消息以更新梦境状态。

（6）如果需要，发送通知。

函数finishWakefulnessChangeIfNeededLocked

（7）更新暂停阻止程序。

因为我们可能会在这里释放最后一个暂停阻止程序，所以我们需要确保先完成其他所有操作！

函数updateSuspendBlockerLocked

背光亮度调整

主要在DisplayPowerController.java中更新设备状态，在LightsService.java中为实际的操作

一、DisplayPowerController.java函数updatePowerState

获取从PowerManagerService传来的DisplayPowerRequest状态，实时更新背光状态，显示屏状态。

(1)使用策略计算基本显示状态。

主要包括使用POLICY决定显示状态和拨打电话时距离传感器影响显示状态

        int state;
        float brightnessState = PowerManager.BRIGHTNESS_INVALID_FLOAT;
        boolean performScreenOffTransition = false;
        switch (mPowerRequest.policy) {
            case DisplayPowerRequest.POLICY_OFF:
                state = Display.STATE_OFF;
                performScreenOffTransition = true;
                break;
            case DisplayPowerRequest.POLICY_DOZE:
                if (mPowerRequest.dozeScreenState != Display.STATE_UNKNOWN) {
                    state = mPowerRequest.dozeScreenState;
                } else {
                    state = Display.STATE_DOZE;
                }
                if (!mAllowAutoBrightnessWhileDozingConfig) {
                    brightnessState = mPowerRequest.dozeScreenBrightness;
                    mBrightnessReasonTemp.setReason(BrightnessReason.REASON_DOZE);
                }
                break;
            case DisplayPowerRequest.POLICY_VR:
                state = Display.STATE_VR;
                break;
            case DisplayPowerRequest.POLICY_DIM:
            case DisplayPowerRequest.POLICY_BRIGHT:
            default:
                state = Display.STATE_ON;
                break;
        }
        assert(state != Display.STATE_UNKNOWN);
 
        // Apply the proximity sensor.
        if (mProximitySensor != null) {
            if (mPowerRequest.useProximitySensor && state != Display.STATE_OFF) {
                // At this point the policy says that the screen should be on, but we've been
                // asked to listen to the prox sensor to adjust the display state, so lets make
                // sure the sensor is on.
                setProximitySensorEnabled(true);
                if (!mScreenOffBecauseOfProximity
                        && mProximity == PROXIMITY_POSITIVE
                        && !mIgnoreProximityUntilChanged) {
                    // Prox sensor already reporting "near" so we should turn off the screen.
                    // Also checked that we aren't currently set to ignore the proximity sensor
                    // temporarily.
                    mScreenOffBecauseOfProximity = true;
                    sendOnProximityPositiveWithWakelock();
                }
            } else if (mWaitingForNegativeProximity
                    && mScreenOffBecauseOfProximity
                    && mProximity == PROXIMITY_POSITIVE
                    && state != Display.STATE_OFF) {
                // The policy says that we should have the screen on, but it's off due to the prox
                // and we've been asked to wait until the screen is far from the user to turn it
                // back on. Let keep the prox sensor on so we can tell when it's far again.
                setProximitySensorEnabled(true);
            } else {
                // We haven't been asked to use the prox sensor and we're not waiting on the screen
                // to turn back on...so lets shut down the prox sensor.
                setProximitySensorEnabled(false);
                mWaitingForNegativeProximity = false;
            }
 
            if (mScreenOffBecauseOfProximity
                    && (mProximity != PROXIMITY_POSITIVE || mIgnoreProximityUntilChanged)) {
                // The screen *was* off due to prox being near, but now it's "far" so lets turn
                // the screen back on.  Also turn it back on if we've been asked to ignore the
                // prox sensor temporarily.
                mScreenOffBecauseOfProximity = false;
                sendOnProximityNegativeWithWakelock();
            }
        } else {
            mWaitingForNegativeProximity = false;
            mIgnoreProximityUntilChanged = false;
        }
        if (mScreenOffBecauseOfProximity) {
            state = Display.STATE_OFF;
        }
 
        // Animate the screen state change unless already animating.
        // The transition may be deferred, so after this point we will use the
        // actual state instead of the desired one.
        final int oldState = mPowerState.getScreenState();
        animateScreenStateChange(state, performScreenOffTransition);
        state = mPowerState.getScreenState();
 
        if (state == Display.STATE_OFF) {
            brightnessState = PowerManager.BRIGHTNESS_OFF_FLOAT;
            mBrightnessReasonTemp.setReason(BrightnessReason.REASON_SCREEN_OFF);
        }
 
        // Always use the VR brightness when in the VR state.
        if (state == Display.STATE_VR) {
            brightnessState = mScreenBrightnessForVr;
            mBrightnessReasonTemp.setReason(BrightnessReason.REASON_VR);
        }

(2)使用策略计算基本背光状态。

主要包括正常情况下的亮度、光传感器自动调节时的亮度、DIM下的亮度、低电量下的亮度等等

if ((Float.isNaN(brightnessState))
                && isValidBrightnessValue(mPowerRequest.screenBrightnessOverride)) {
            brightnessState = mPowerRequest.screenBrightnessOverride;
            mBrightnessReasonTemp.setReason(BrightnessReason.REASON_OVERRIDE);
            mAppliedScreenBrightnessOverride = true;
        } else {
            mAppliedScreenBrightnessOverride = false;
        }
 
        final boolean autoBrightnessEnabledInDoze =
                mAllowAutoBrightnessWhileDozingConfig && Display.isDozeState(state);
        final boolean autoBrightnessEnabled = mPowerRequest.useAutoBrightness
                    && (state == Display.STATE_ON || autoBrightnessEnabledInDoze)
                    && Float.isNaN(brightnessState)
                    && mAutomaticBrightnessController != null;
 
        final boolean userSetBrightnessChanged = updateUserSetScreenBrightness();
 
        // Use the temporary screen brightness if there isn't an override, either from
        // WindowManager or based on the display state.
        if (isValidBrightnessValue(mTemporaryScreenBrightness)) {
            brightnessState = mTemporaryScreenBrightness;
            mAppliedTemporaryBrightness = true;
            mBrightnessReasonTemp.setReason(BrightnessReason.REASON_TEMPORARY);
        } else {
            mAppliedTemporaryBrightness = false;
        }
 
        final boolean autoBrightnessAdjustmentChanged = updateAutoBrightnessAdjustment();
        if (autoBrightnessAdjustmentChanged) {
            mTemporaryAutoBrightnessAdjustment = Float.NaN;
        }
 
        // Use the autobrightness adjustment override if set.
        final float autoBrightnessAdjustment;
        if (!Float.isNaN(mTemporaryAutoBrightnessAdjustment)) {
            autoBrightnessAdjustment = mTemporaryAutoBrightnessAdjustment;
            brightnessAdjustmentFlags = BrightnessReason.ADJUSTMENT_AUTO_TEMP;
            mAppliedTemporaryAutoBrightnessAdjustment = true;
        } else {
            autoBrightnessAdjustment = mAutoBrightnessAdjustment;
            brightnessAdjustmentFlags = BrightnessReason.ADJUSTMENT_AUTO;
            mAppliedTemporaryAutoBrightnessAdjustment = false;
        }
        // Apply brightness boost.
        // We do this here after deciding whether auto-brightness is enabled so that we don't
        // disable the light sensor during this temporary state.  That way when boost ends we will
        // be able to resume normal auto-brightness behavior without any delay.
        if (mPowerRequest.boostScreenBrightness
                && brightnessState != PowerManager.BRIGHTNESS_OFF_FLOAT) {
            brightnessState = PowerManager.BRIGHTNESS_MAX;
            mBrightnessReasonTemp.setReason(BrightnessReason.REASON_BOOST);
            mAppliedBrightnessBoost = true;
        } else {
            mAppliedBrightnessBoost = false;
        }
 
        // If the brightness is already set then it's been overridden by something other than the
        // user, or is a temporary adjustment.
        boolean userInitiatedChange = (Float.isNaN(brightnessState))
                && (autoBrightnessAdjustmentChanged || userSetBrightnessChanged);
        boolean hadUserBrightnessPoint = false;
        // Configure auto-brightness.
        if (mAutomaticBrightnessController != null) {
            hadUserBrightnessPoint = mAutomaticBrightnessController.hasUserDataPoints();
            mAutomaticBrightnessController.configure(autoBrightnessEnabled,
                    mBrightnessConfiguration,
                    mLastUserSetScreenBrightness,
                    userSetBrightnessChanged, autoBrightnessAdjustment,
                    autoBrightnessAdjustmentChanged, mPowerRequest.policy);
        }
 
        if (mBrightnessTracker != null) {
            mBrightnessTracker.setBrightnessConfiguration(mBrightnessConfiguration);
        }
 
        // Apply auto-brightness.
        boolean slowChange = false;
        if (Float.isNaN(brightnessState)) {
            float newAutoBrightnessAdjustment = autoBrightnessAdjustment;
            if (autoBrightnessEnabled) {
                brightnessState = mAutomaticBrightnessController.getAutomaticScreenBrightness();
                newAutoBrightnessAdjustment =
                        mAutomaticBrightnessController.getAutomaticScreenBrightnessAdjustment();
            }
            if (isValidBrightnessValue(brightnessState)
                    || brightnessState == PowerManager.BRIGHTNESS_OFF_FLOAT) {
                // Use current auto-brightness value and slowly adjust to changes.
                brightnessState = clampScreenBrightness(brightnessState);
                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);
                mAppliedAutoBrightness = true;
                mBrightnessReasonTemp.setReason(BrightnessReason.REASON_AUTOMATIC);
            } else {
                mAppliedAutoBrightness = false;
            }
            if (autoBrightnessAdjustment != newAutoBrightnessAdjustment) {
                // If the autobrightness controller has decided to change the adjustment value
                // used, make sure that's reflected in settings.
                putAutoBrightnessAdjustmentSetting(newAutoBrightnessAdjustment);
            } else {
                // Adjustment values resulted in no change
                brightnessAdjustmentFlags = 0;
            }
        } else {
            mAppliedAutoBrightness = false;
            brightnessAdjustmentFlags = 0;
        }
        // Use default brightness when dozing unless overridden.
        if ((Float.isNaN(brightnessState))
                && Display.isDozeState(state)) {
            brightnessState = mScreenBrightnessDozeConfig;
            mBrightnessReasonTemp.setReason(BrightnessReason.REASON_DOZE_DEFAULT);
        }
 
        // Apply manual brightness.
        if (Float.isNaN(brightnessState)) {
            brightnessState = clampScreenBrightness(mCurrentScreenBrightnessSetting);
            mBrightnessReasonTemp.setReason(BrightnessReason.REASON_MANUAL);
        }
 
        // Apply dimming by at least some minimum amount when user activity
        // timeout is about to expire.
        if (mPowerRequest.policy == DisplayPowerRequest.POLICY_DIM) {
            if (brightnessState > mScreenBrightnessRangeMinimum) {
                brightnessState = Math.max(Math.min(brightnessState
                                - SCREEN_DIM_MINIMUM_REDUCTION_FLOAT,
                        mScreenBrightnessDimConfig), mScreenBrightnessRangeMinimum);
                mBrightnessReasonTemp.addModifier(BrightnessReason.MODIFIER_DIMMED);
            }
            if (!mAppliedDimming) {
                slowChange = false;
            }
            mAppliedDimming = true;
        } else if (mAppliedDimming) {
            slowChange = false;
            mAppliedDimming = false;
        }
        // If low power mode is enabled, scale brightness by screenLowPowerBrightnessFactor
        // as long as it is above the minimum threshold.
        if (mPowerRequest.lowPowerMode) {
            if (brightnessState > mScreenBrightnessRangeMinimum) {
                final float brightnessFactor =
                        Math.min(mPowerRequest.screenLowPowerBrightnessFactor, 1);
                final float lowPowerBrightnessFloat = (brightnessState * brightnessFactor);
                brightnessState = Math.max(lowPowerBrightnessFloat,
                        mScreenBrightnessRangeMinimum);
                mBrightnessReasonTemp.addModifier(BrightnessReason.MODIFIER_LOW_POWER);
            }
            if (!mAppliedLowPower) {
                slowChange = false;
            }
            mAppliedLowPower = true;
        } else if (mAppliedLowPower) {
            slowChange = false;
            mAppliedLowPower = false;
        }

（3）当屏幕打开或打瞌睡时，设置屏幕亮度的动画。

        // Animate the screen brightness when the screen is on or dozing.
        // Skip the animation when the screen is off or suspended or transition to/from VR.
        if (!mPendingScreenOff) {
            if (mSkipScreenOnBrightnessRamp) {
                if (state == Display.STATE_ON) {
                    if (mSkipRampState == RAMP_STATE_SKIP_NONE && mDozing) {
                        mInitialAutoBrightness = brightnessState;
                        mSkipRampState = RAMP_STATE_SKIP_INITIAL;
                    } else if (mSkipRampState == RAMP_STATE_SKIP_INITIAL
                            && mUseSoftwareAutoBrightnessConfig
                            && !BrightnessSynchronizer.floatEquals(brightnessState,
                            mInitialAutoBrightness)) {
                        mSkipRampState = RAMP_STATE_SKIP_AUTOBRIGHT;
                    } else if (mSkipRampState == RAMP_STATE_SKIP_AUTOBRIGHT) {
                        mSkipRampState = RAMP_STATE_SKIP_NONE;
                    }
                } else {
                    mSkipRampState = RAMP_STATE_SKIP_NONE;
                }
            }
 
            final boolean wasOrWillBeInVr =
                    (state == Display.STATE_VR || oldState == Display.STATE_VR);
            final boolean initialRampSkip =
                    state == Display.STATE_ON && mSkipRampState != RAMP_STATE_SKIP_NONE;
            // While dozing, sometimes the brightness is split into buckets. Rather than animating
            // through the buckets, which is unlikely to be smooth in the first place, just jump
            // right to the suggested brightness.
            final boolean hasBrightnessBuckets =
                    Display.isDozeState(state) && mBrightnessBucketsInDozeConfig;
            // If the color fade is totally covering the screen then we can change the backlight
            // level without it being a noticeable jump since any actual content isn't yet visible.
            final boolean isDisplayContentVisible =
                    mColorFadeEnabled && mPowerState.getColorFadeLevel() == 1.0f;
            final boolean brightnessIsTemporary =
                    mAppliedTemporaryBrightness || mAppliedTemporaryAutoBrightnessAdjustment;
            // We only want to animate the brightness if it is between 0.0f and 1.0f.
            // brightnessState can contain the values -1.0f and NaN, which we do not want to
            // 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;
            if (isValidBrightnessValue(animateValue)) {
                if (initialRampSkip || hasBrightnessBuckets
                        || wasOrWillBeInVr || !isDisplayContentVisible || brightnessIsTemporary) {
                    animateScreenBrightness(animateValue, SCREEN_ANIMATION_RATE_MINIMUM);
                } else {
                    animateScreenBrightness(animateValue,
                            slowChange ? mBrightnessRampRateSlow : mBrightnessRampRateFast);
                }
            }
 
            if (!brightnessIsTemporary) {
                if (userInitiatedChange && (mAutomaticBrightnessController == null
                        || !mAutomaticBrightnessController.hasValidAmbientLux())) {
                    // If we don't have a valid lux reading we can't report a valid
                    // slider event so notify as if the system changed the brightness.
                    userInitiatedChange = false;
                }
                notifyBrightnessChanged(
                        BrightnessSynchronizer.brightnessFloatToInt(mContext, brightnessState),
                        userInitiatedChange, hadUserBrightnessPoint);
            }
 
        }
 
        // Log any changes to what is currently driving the brightness setting.
        if (!mBrightnessReasonTemp.equals(mBrightnessReason) || brightnessAdjustmentFlags != 0) {
            Slog.v(TAG, "Brightness [" + brightnessState + "] reason changing to: '"
                    + mBrightnessReasonTemp.toString(brightnessAdjustmentFlags)
                    + "', previous reason: '" + mBrightnessReason + "'.");
            mBrightnessReason.set(mBrightnessReasonTemp);
        }

二、操作背光亮度

（1）LightsService.java函数setBrightness

setBrightness会决定走一下那个流程：

方式1：system_server->SF->HWC HAL->设备节点->背光驱动
方式2：system_server->Light HAL->设备节点->背光驱动

        @Override
        public void setBrightness(float brightness) {
            setBrightness(brightness, BRIGHTNESS_MODE_USER);
        }
 
        @Override
        public void setBrightness(float brightness, int brightnessMode) {
            if (Float.isNaN(brightness)) {
                Slog.w(TAG, "Brightness is not valid: " + brightness);
                return;
            }
            synchronized (this) {
                // LOW_PERSISTENCE cannot be manually set
                if (brightnessMode == BRIGHTNESS_MODE_LOW_PERSISTENCE) {
                    Slog.w(TAG, "setBrightness with LOW_PERSISTENCE unexpected #" + mHwLight.id
                            + ": brightness=" + brightness);
                    return;
                }
                // Ideally, we'd like to set the brightness mode through the SF/HWC as well, but
                // right now we just fall back to the old path through Lights brightessMode is
                // anything but USER or the device shouldBeInLowPersistenceMode().
                if (brightnessMode == BRIGHTNESS_MODE_USER && !shouldBeInLowPersistenceMode()
                        && mSurfaceControlMaximumBrightness == 255) {
                    // New system
                    // TODO: the last check should be mSurfaceControlMaximumBrightness != 0; the
                    // reason we enforce 255 right now is to stay consistent with the old path. In
                    // the future, the framework should be refactored so that brightness is a float
                    // between 0.0f and 1.0f, and the actual number of supported brightness levels
                    // is determined in the device-specific implementation.
                    if (DEBUG) {
                        Slog.d(TAG, "Using new setBrightness path!");
                    }
                    SurfaceControl.setDisplayBrightness(mDisplayToken, brightness);
                } else {
                    // Old system
                    int brightnessInt = BrightnessSynchronizer.brightnessFloatToInt(
                            getContext(), brightness);
                    int color = brightnessInt & 0x000000ff;
                    color = 0xff000000 | (color << 16) | (color << 8) | color;
                    setLightLocked(color, LIGHT_FLASH_NONE, 0, 0, brightnessMode);
                }
            }
        }

（2）SurfaceControl.setDisplayBrightness

此方法的流程为：system_server->SF->HWC HAL->设备节点->背光驱动

（3）函数setLightLocked

通过 android.hardware.light.ILights/default获取Light HAL，走流程：

方式2：system_server->Light HAL->设备节点->背光驱动

        private void setLightLocked(int color, int mode, int onMS, int offMS, int brightnessMode) {
            if (shouldBeInLowPersistenceMode()) {
                brightnessMode = BRIGHTNESS_MODE_LOW_PERSISTENCE;
            } else if (brightnessMode == BRIGHTNESS_MODE_LOW_PERSISTENCE) {
                brightnessMode = mLastBrightnessMode;
            }
 
            if (!mInitialized || color != mColor || mode != mMode || onMS != mOnMS ||
                    offMS != mOffMS || mBrightnessMode != brightnessMode) {
                if (DEBUG) {
                    Slog.v(TAG, "setLight #" + mHwLight.id + ": color=#"
                            + Integer.toHexString(color) + ": brightnessMode=" + brightnessMode);
                }
                mInitialized = true;
                mLastColor = mColor;
                mColor = color;
                mMode = mode;
                mOnMS = onMS;
                mOffMS = offMS;
                mBrightnessMode = brightnessMode;
                setLightUnchecked(color, mode, onMS, offMS, brightnessMode);
            }
        }
 
        private void setLightUnchecked(int color, int mode, int onMS, int offMS,
                int brightnessMode) {
            Trace.traceBegin(Trace.TRACE_TAG_POWER, "setLightState(" + mHwLight.id + ", 0x"
                    + Integer.toHexString(color) + ")");
            try {
                if (mVintfLights != null) {
                    HwLightState lightState = new HwLightState();
                    lightState.color = color;
                    lightState.flashMode = (byte) mode;
                    lightState.flashOnMs = onMS;
                    lightState.flashOffMs = offMS;
                    lightState.brightnessMode = (byte) brightnessMode;
                    mVintfLights.get().setLightState(mHwLight.id, lightState);
                } else {
                    setLight_native(mHwLight.id, color, mode, onMS, offMS, brightnessMode);
                }
            } catch (RemoteException | UnsupportedOperationException ex) {
                Slog.e(TAG, "Failed issuing setLightState", ex);
            } finally {
                Trace.traceEnd(Trace.TRACE_TAG_POWER);
            }
        }