diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index 71377ed..e3e0b0a 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -72,7 +72,8 @@
       mSecureLayerVisible(false),
       mLayerStack(NO_LAYER_STACK),
       mOrientation(),
-      mPowerMode(HWC_POWER_MODE_OFF)
+      mPowerMode(HWC_POWER_MODE_OFF),
+      mActiveConfig(0)
 {
     mNativeWindow = new Surface(producer, false);
     ANativeWindow* const window = mNativeWindow.get();
@@ -336,6 +337,15 @@
 }
 
 // ----------------------------------------------------------------------------
+void DisplayDevice::setActiveConfig(int mode) {
+    mActiveConfig = mode;
+}
+
+int DisplayDevice::getActiveConfig()  const {
+    return mActiveConfig;
+}
+
+// ----------------------------------------------------------------------------
 
 void DisplayDevice::setLayerStack(uint32_t stack) {
     mLayerStack = stack;
@@ -461,13 +471,14 @@
     result.appendFormat(
         "+ DisplayDevice: %s\n"
         "   type=%x, hwcId=%d, layerStack=%u, (%4dx%4d), ANativeWindow=%p, orient=%2d (type=%08x), "
-        "flips=%u, isSecure=%d, secureVis=%d, powerMode=%d, numLayers=%zu\n"
+        "flips=%u, isSecure=%d, secureVis=%d, powerMode=%d, activeConfig=%d, numLayers=%zu\n"
         "   v:[%d,%d,%d,%d], f:[%d,%d,%d,%d], s:[%d,%d,%d,%d],"
         "transform:[[%0.3f,%0.3f,%0.3f][%0.3f,%0.3f,%0.3f][%0.3f,%0.3f,%0.3f]]\n",
         mDisplayName.string(), mType, mHwcDisplayId,
         mLayerStack, mDisplayWidth, mDisplayHeight, mNativeWindow.get(),
         mOrientation, tr.getType(), getPageFlipCount(),
-        mIsSecure, mSecureLayerVisible, mPowerMode, mVisibleLayersSortedByZ.size(),
+        mIsSecure, mSecureLayerVisible, mPowerMode, mActiveConfig,
+        mVisibleLayersSortedByZ.size(),
         mViewport.left, mViewport.top, mViewport.right, mViewport.bottom,
         mFrame.left, mFrame.top, mFrame.right, mFrame.bottom,
         mScissor.left, mScissor.top, mScissor.right, mScissor.bottom,