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Commit 5878442b authored by Dan Gittik's avatar Dan Gittik
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Fixed auto-brightness when ALS malfunctions. 

When the ALS is broken or misbehaving, auto-brightness might get
stuck in a state where it completely ignores user data points;
this fixes the issue, and reverts to manual brightness whenever
auto-brightness can't be used reliably.

Test: manual.

Change-Id: I5eb80b99dbf7cc25229dc217732515b2a4ac1b79
Fixes: 77280930
parent 0d130cbc

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

+4 −0
Original line number Diff line number Diff line
@@ -222,6 +222,9 @@ class AutomaticBrightnessController { 
    }



    public int getAutomaticScreenBrightness() {

        if (!mAmbientLuxValid) {

            return -1;

        }

        if (mDisplayPolicy == DisplayPowerRequest.POLICY_DOZE) {

            return (int) (mScreenAutoBrightness * mDozeScaleFactor);

        }
@@ -346,6 +349,7 @@ class AutomaticBrightnessController { 
        pw.println("  mLightSensorEnabled=" + mLightSensorEnabled);

        pw.println("  mLightSensorEnableTime=" + TimeUtils.formatUptime(mLightSensorEnableTime));

        pw.println("  mAmbientLux=" + mAmbientLux);

        pw.println("  mAmbientLuxValid=" + mAmbientLuxValid);

        pw.println("  mAmbientLightHorizon=" + mAmbientLightHorizon);

        pw.println("  mBrighteningLuxThreshold=" + mBrighteningLuxThreshold);

        pw.println("  mDarkeningLuxThreshold=" + mDarkeningLuxThreshold);