power: Add panel auto-brightness configuration

 * Some panel hardware requires that we twiddle some knobs in sysfs to
   enable proper display calibration (gamma, etc) when auto-brightness
   is enabled. Add a configuration value to handle this.

Change-Id: I3c793c3520fc6f9a18d5a3abf1fe0df803c5e580

1 files changed, 9 insertions, 0 deletions

diff --git a/services/java/com/android/server/power/PowerManagerService.java b/services/java/com/android/server/power/PowerManagerService.java
index e8f6b60..f1971c4 100644
--- a/services/java/com/android/server/power/PowerManagerService.java
+++ b/services/java/com/android/server/power/PowerManagerService.java
@@ -183,6 +183,7 @@ public final class PowerManagerService extends IPowerManager.Stub
     private WirelessChargerDetector mWirelessChargerDetector;
     private SettingsObserver mSettingsObserver;
     private DreamManagerService mDreamManager;
+    private AutoBrightnessHandler mAutoBrightnessHandler;
     private LightsService.Light mAttentionLight;
     private LightsService.Light mButtonsLight;
     private LightsService.Light mKeyboardLight;
@@ -418,6 +419,9 @@ public final class PowerManagerService extends IPowerManager.Stub
         // activity manager is not running when the constructor is called, so we
         // have to defer setting the screen state until this point.
         mDisplayBlanker.unblankAllDisplays();
+
+        mAutoBrightnessHandler = new AutoBrightnessHandler(context);
+
     }
 
     public void setPolicy(WindowManagerPolicy policy) {
@@ -567,9 +571,14 @@ public final class PowerManagerService extends IPowerManager.Stub
             mTemporaryScreenAutoBrightnessAdjustmentSettingOverride = Float.NaN;
         }
 
+        final int oldScreenBrightnessModeSetting =
+                mScreenBrightnessModeSetting;
         mScreenBrightnessModeSetting = Settings.System.getIntForUser(resolver,
                 Settings.System.SCREEN_BRIGHTNESS_MODE,
                 Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL, UserHandle.USER_CURRENT);
+        if (oldScreenBrightnessModeSetting != mScreenBrightnessModeSetting) {
+            mAutoBrightnessHandler.onAutoBrightnessChanged(mScreenBrightnessModeSetting);
+        }
 
         mDirty |= DIRTY_SETTINGS;
     }