Manage button and keyboard backlights with light sensor in both manual and automatic mode.

Now the manual brightness mode only applies to the LCD backlight and
button and keyboard backlights are always managed automatically.

Fixes bug b/2195798 (Passion capacitive key backlights don't always come on)

This change only affects the framework based auto-brightness implementation.
Hardware auto-brightness is not affected.

Change-Id: Ib88310d642d498591e8879c8269d630ff3f7c8af
Signed-off-by: Mike Lockwood <lockwood@android.com>

1 files changed, 15 insertions, 14 deletions

diff --git a/services/java/com/android/server/PowerManagerService.java b/services/java/com/android/server/PowerManagerService.java
index 455ae46..d90235f 100644
--- a/services/java/com/android/server/PowerManagerService.java
+++ b/services/java/com/android/server/PowerManagerService.java
@@ -487,7 +487,7 @@ class PowerManagerService extends IPowerManager.Stub
         // And explicitly do the initial update of our cached settings
         updateGservicesValues();
 
-        if (mUseSoftwareAutoBrightness && mAutoBrightessEnabled) {
+        if (mUseSoftwareAutoBrightness) {
             // turn the screen on
             setPowerState(SCREEN_BRIGHT);
         } else {
@@ -589,7 +589,7 @@ class PowerManagerService extends IPowerManager.Stub
             switch (wl.flags & LOCK_MASK)
             {
                 case PowerManager.FULL_WAKE_LOCK:
-                    if (mAutoBrightessEnabled && mUseSoftwareAutoBrightness) {
+                    if (mUseSoftwareAutoBrightness) {
                         wl.minState = SCREEN_BRIGHT;
                     } else {
                         wl.minState = (mKeyboardVisible ? ALL_BRIGHT : SCREEN_BUTTON_BRIGHT);
@@ -1300,7 +1300,7 @@ class PowerManagerService extends IPowerManager.Stub
     private int setScreenStateLocked(boolean on) {
         int err = Power.setScreenState(on);
         if (err == 0 && mUseSoftwareAutoBrightness) {
-            enableLightSensor(on && mAutoBrightessEnabled);
+            enableLightSensor(on);
             if (!on) {
                 // make sure button and key backlights are off too
                 mHardware.setLightBrightness_UNCHECKED(HardwareService.LIGHT_ID_BUTTONS, 0);
@@ -1346,7 +1346,7 @@ class PowerManagerService extends IPowerManager.Stub
                 return;
             }
 
-            if (!mDoneBooting && !(mAutoBrightessEnabled && mUseSoftwareAutoBrightness)) {
+            if (!mDoneBooting && !mUseSoftwareAutoBrightness) {
                 newState |= ALL_BRIGHT;
             }
 
@@ -1858,8 +1858,7 @@ class PowerManagerService extends IPowerManager.Stub
                 if ((mUserActivityAllowed && !mProximitySensorActive) || force) {
                     // Only turn on button backlights if a button was pressed
                     // and auto brightness is disabled
-                    if (eventType == BUTTON_EVENT &&
-                            !(mAutoBrightessEnabled && mUseSoftwareAutoBrightness)) {
+                    if (eventType == BUTTON_EVENT && !mUseSoftwareAutoBrightness) {
                         mUserState = (mKeyboardVisible ? ALL_BRIGHT : SCREEN_BUTTON_BRIGHT);
                     } else {
                         // don't clear button/keyboard backlights when the screen is touched.
@@ -1937,7 +1936,7 @@ class PowerManagerService extends IPowerManager.Stub
                 }
 
                 boolean startAnimation = false;
-                if (mScreenBrightnessOverride < 0) {
+                if (mAutoBrightessEnabled && mScreenBrightnessOverride < 0) {
                     if (ANIMATE_SCREEN_LIGHTS) {
                         if (mScreenBrightness.setTargetLocked(lcdValue,
                                 AUTOBRIGHTNESS_ANIM_STEPS, INITIAL_SCREEN_BRIGHTNESS,
@@ -2049,7 +2048,7 @@ class PowerManagerService extends IPowerManager.Stub
                 // will take care of turning on due to a true change to the lid
                 // switch and synchronized with the lock screen.
                 if ((mPowerState & SCREEN_ON_BIT) != 0) {
-                    if (mAutoBrightessEnabled && mUseSoftwareAutoBrightness) {
+                    if (mUseSoftwareAutoBrightness) {
                         // force recompute of backlight values
                         if (mLightSensorValue >= 0) {
                             int value = (int)mLightSensorValue;
@@ -2084,11 +2083,13 @@ class PowerManagerService extends IPowerManager.Stub
                 if (screenIsOn()) {
                     setBacklightBrightness((int)mScreenBrightness.curValue);
                 }
-            } else if (mUseSoftwareAutoBrightness) {
-                // reset computed brightness
-                mLightSensorValue = -1;
-                mLightSensorBrightness = -1;
-                enableLightSensor(screenIsOn() && enabled);
+            } else if (mUseSoftwareAutoBrightness && screenIsOn()) {
+                // force recompute of backlight values
+                if (mLightSensorValue >= 0) {
+                    int value = (int)mLightSensorValue;
+                    mLightSensorValue = -1;
+                    lightSensorChangedLocked(value);
+                }
             }
         }
     }
@@ -2244,7 +2245,7 @@ class PowerManagerService extends IPowerManager.Stub
         // don't bother with the light sensor if auto brightness is handled in hardware
         if (mUseSoftwareAutoBrightness) {
             mLightSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
-            enableLightSensor(mAutoBrightessEnabled);
+            enableLightSensor(true);
         }
 
         synchronized (mLocks) {