3 files changed, 33 insertions, 2 deletions
diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index 13d44f3..baff5ba 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -90,6 +90,7 @@ DisplayDevice::DisplayDevice(
 {
     mNativeWindow = new Surface(producer, false);
     ANativeWindow* const window = mNativeWindow.get();
+    char property[PROPERTY_VALUE_MAX];
 
     /*
      * Create our display's surface
@@ -140,6 +141,11 @@ DisplayDevice::DisplayDevice(
             break;
     }
 
+    mPanelInverseMounted = false;
+    // Check if panel is inverse mounted (contents show up HV flipped)
+    property_get("persist.panel.inversemounted", property, "0");
+    mPanelInverseMounted = !!atoi(property);
+
     // initialize the display orientation transform.
     setProjection(DisplayState::eOrientationDefault, mViewport, mFrame);
 }
@@ -402,6 +408,11 @@ status_t DisplayDevice::orientationToTransfrom(
     default:
         return BAD_VALUE;
     }
+
+    if (DISPLAY_PRIMARY == mHwcDisplayId && isPanelInverseMounted()) {
+        flags = flags ^ Transform::ROT_180;
+    }
+
     tr->set(flags, w, h);
     return NO_ERROR;
 }
diff --git a/services/surfaceflinger/DisplayDevice.h b/services/surfaceflinger/DisplayDevice.h
index 8695a44..f492a42 100644
--- a/services/surfaceflinger/DisplayDevice.h
+++ b/services/surfaceflinger/DisplayDevice.h
@@ -126,6 +126,10 @@ public:
     int32_t                 getHwcDisplayId() const { return mHwcDisplayId; }
     const wp<IBinder>&      getDisplayToken() const { return mDisplayToken; }
 
+    bool isPanelInverseMounted() const {
+        return mPanelInverseMounted;
+    }
+
     // We pass in mustRecompose so we can keep VirtualDisplaySurface's state
     // machine happy without actually queueing a buffer if nothing has changed
     status_t beginFrame(bool mustRecompose) const;
@@ -209,7 +213,7 @@ private:
     /*
      * Transaction state
      */
-    static status_t orientationToTransfrom(int orientation,
+    status_t orientationToTransfrom(int orientation,
             int w, int h, Transform* tr);
 
     uint32_t mLayerStack;
@@ -226,6 +230,8 @@ private:
     int mPowerMode;
     // Current active config
     int mActiveConfig;
+    // Panel is inverse mounted
+    int mPanelInverseMounted;
 };
 
 }; // namespace android
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 3b4330d..c5e50e8 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -3306,6 +3306,12 @@ void SurfaceFlinger::renderScreenImplLocked(
     // make sure to clear all GL error flags
     engine.checkErrors();
 
+    if (DisplayDevice::DISPLAY_PRIMARY == hw->getDisplayType() &&
+                hw->isPanelInverseMounted()) {
+        rotation = (Transform::orientation_flags)
+                (rotation ^ Transform::ROT_180);
+    }
+
     // set-up our viewport
     engine.setViewportAndProjection(
         reqWidth, reqHeight, sourceCrop, hw_h, yswap, rotation);
@@ -3508,8 +3514,16 @@ bool SurfaceFlinger::updateLayerVisibleNonTransparentRegion(const int& /*dpy*/,
     const Layer::State& s(layer->getDrawingState());
 
     // only consider the layers on the given layer stack
-    if (s.layerStack != layerStack)
+    if (s.layerStack != layerStack) {
+        /* set the visible region as empty since we have removed the
+         * layerstack check in rebuildLayerStack() function
+         */
+        Region visibleNonTransRegion;
+        visibleNonTransRegion.set(Rect(0,0));
+        layer->setVisibleNonTransparentRegion(visibleNonTransRegion);
+
         return true;
+    }
 
     return false;
 }