Merge "Blank all displays including Wifi Display when screen is off." into jb-mr1-dev

Author: Jeff Brown

services/java/com/android/server/display/DisplayManagerService.java

@@ -305,6 +305,8 @@ public void blankAllDisplaysFromPowerManager() {
                     DisplayDevice device = mDisplayDevices.get(i);
                     device.blankLocked();
                 }
+
+                scheduleTraversalLocked(false);
             }
         }
     }
@@ -322,6 +324,8 @@ public void unblankAllDisplaysFromPowerManager() {
                     DisplayDevice device = mDisplayDevices.get(i);
                     device.unblankLocked();
                 }
+
+                scheduleTraversalLocked(false);
             }
         }
     }
@@ -755,7 +759,9 @@ private void configureDisplayInTransactionLocked(DisplayDevice device) {
                     + device.getDisplayDeviceInfoLocked());
             return;
         } else {
-            display.configureDisplayInTransactionLocked(device);
+            boolean isBlanked = (mAllDisplayBlankStateFromPowerManager
+                    == DISPLAY_BLANK_STATE_BLANKED);
+            display.configureDisplayInTransactionLocked(device, isBlanked);
         }
 
         // Update the viewports if needed.

services/java/com/android/server/display/LogicalDisplay.java

@@ -55,6 +55,10 @@
 final class LogicalDisplay {
     private final DisplayInfo mBaseDisplayInfo = new DisplayInfo();
 
+    // The layer stack we use when the display has been blanked to prevent any
+    // of its content from appearing.
+    private static final int BLANK_LAYER_STACK = -1;
+
     private final int mDisplayId;
     private final int mLayerStack;
     private DisplayInfo mOverrideDisplayInfo; // set by the window manager
@@ -217,13 +221,15 @@ public void updateLocked(List<DisplayDevice> devices) {
      * where the display is being mirrored.
      *
      * @param device The display device to modify.
+     * @param isBlanked True if the device is being blanked.
      */
-    public void configureDisplayInTransactionLocked(DisplayDevice device) {
+    public void configureDisplayInTransactionLocked(DisplayDevice device,
+            boolean isBlanked) {
         final DisplayInfo displayInfo = getDisplayInfoLocked();
         final DisplayDeviceInfo displayDeviceInfo = device.getDisplayDeviceInfoLocked();
 
         // Set the layer stack.
-        device.setLayerStackInTransactionLocked(mLayerStack);
+        device.setLayerStackInTransactionLocked(isBlanked ? BLANK_LAYER_STACK : mLayerStack);
 
         // Set the viewport.
         // This is the area of the logical display that we intend to show on the