diff --git a/libhwcomposer/hwc_utils.cpp b/libhwcomposer/hwc_utils.cpp
index 6869454..5692ef1 100644
--- a/libhwcomposer/hwc_utils.cpp
+++ b/libhwcomposer/hwc_utils.cpp
@@ -744,6 +744,28 @@
     }
 }
 
+hwc_rect_t calculateDisplayViewFrame(hwc_context_t *ctx, int dpy) {
+    int dstWidth = ctx->dpyAttr[dpy].xres;
+    int dstHeight = ctx->dpyAttr[dpy].yres;
+    int srcWidth = ctx->dpyAttr[HWC_DISPLAY_PRIMARY].xres;
+    int srcHeight = ctx->dpyAttr[HWC_DISPLAY_PRIMARY].yres;
+    // default we assume viewframe as a full frame for primary display
+    hwc_rect outRect = {0, 0, dstWidth, dstHeight};
+    if(dpy) {
+        // swap srcWidth and srcHeight, if the device orientation is 90 or 270.
+        if(ctx->deviceOrientation & 0x1) {
+            swap(srcWidth, srcHeight);
+        }
+        // Get Aspect Ratio for external
+        getAspectRatioPosition(dstWidth, dstHeight, srcWidth,
+                            srcHeight, outRect);
+    }
+    ALOGD_IF(HWC_UTILS_DEBUG, "%s: view frame for dpy %d is [%d %d %d %d]",
+        __FUNCTION__, dpy, outRect.left, outRect.top,
+        outRect.right, outRect.bottom);
+    return outRect;
+}
+
 void setListStats(hwc_context_t *ctx,
         hwc_display_contents_1_t *list, int dpy) {
     const int prevYuvCount = ctx->listStats[dpy].yuvCount;
@@ -767,13 +789,14 @@
     trimList(ctx, list, dpy);
     optimizeLayerRects(ctx, list, dpy);
 
+    // Calculate view frame of ext display from primary resolution
+    // and primary device orientation.
+    ctx->mViewFrame[dpy] = calculateDisplayViewFrame(ctx, dpy);
+
     for (size_t i = 0; i < (size_t)ctx->listStats[dpy].numAppLayers; i++) {
         hwc_layer_1_t const* layer = &list->hwLayers[i];
         private_handle_t *hnd = (private_handle_t *)layer->handle;
 
-        // Calculate view frame of each display from the layer displayframe
-        ctx->mViewFrame[dpy] = getUnion(ctx->mViewFrame[dpy],
-                                        layer->displayFrame);
 #ifdef QCOM_BSP
         if (layer->flags & HWC_SCREENSHOT_ANIMATOR_LAYER) {
             ctx->listStats[dpy].isDisplayAnimating = true;
diff --git a/libhwcomposer/hwc_utils.h b/libhwcomposer/hwc_utils.h
index e64f89c..2b889f5 100644
--- a/libhwcomposer/hwc_utils.h
+++ b/libhwcomposer/hwc_utils.h
@@ -200,6 +200,11 @@
 // -----------------------------------------------------------------------------
 // Utility functions - implemented in hwc_utils.cpp
 void dumpLayer(hwc_layer_1_t const* l);
+
+// Calculate viewframe for external/primary display from primary resolution and
+// primary device orientation
+hwc_rect_t calculateDisplayViewFrame(hwc_context_t *ctx, int dpy);
+
 void setListStats(hwc_context_t *ctx, hwc_display_contents_1_t *list,
         int dpy);
 void initContext(hwc_context_t *ctx);