32 files changed, 2617 insertions, 874 deletions

diff --git a/hwc2/common/devices/VirtualDevice.cpp b/hwc2/common/devices/VirtualDevice.cpp
index 24db6aa..b598edf 100644
--- a/hwc2/common/devices/VirtualDevice.cpp
+++ b/hwc2/common/devices/VirtualDevice.cpp
@@ -390,10 +390,12 @@ int32_t VirtualDevice::validateDisplay(uint32_t* outNumTypes,
         layer = mHwcLayers.valueAt(i);
         if (layer) {
             // Virtual Display.
-            if (layer->getCompositionType() != HWC2_COMPOSITION_CLIENT) {
-                // change all other device type to client.
-                mHwcLayersChangeType.add(layerId, layer);
-                continue;
+            if (mVirtualHnd && private_handle_t::validate(mVirtualHnd) >=0) {
+                if (layer->getCompositionType() != HWC2_COMPOSITION_CLIENT) {
+                    // change all other device type to client.
+                    mHwcLayersChangeType.add(layerId, layer);
+                    continue;
+                }
             }
         }
     }
@@ -428,6 +430,10 @@ void VirtualDevice::onVsync(int64_t timestamp) {
     // dont need implement now.
 }
 
+void VirtualDevice::onHotplug(int disp, bool connected) {
+    // dont need implement now.
+}
+
 int32_t VirtualDevice::createVirtualDisplay(
         uint32_t width,
         uint32_t height,