diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index c99c40e..ce8192a 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2100,6 +2100,7 @@
 
         bool needsTraversal = false;
         if (clearTransactionFlags(eTransactionFlushNeeded)) {
+            needsTraversal |= commitMirrorDisplays(vsyncId);
             needsTraversal |= commitCreatedLayers(vsyncId);
             needsTraversal |= flushTransactionQueues(vsyncId);
         }
@@ -4604,6 +4605,55 @@
                           false /* addToRoot */, nullptr /* outTransformHint */);
 }
 
+status_t SurfaceFlinger::mirrorDisplay(DisplayId displayId, const LayerCreationArgs& args,
+                                       sp<IBinder>* outHandle, int32_t* outLayerId) {
+    IPCThreadState* ipc = IPCThreadState::self();
+    const int uid = ipc->getCallingUid();
+    if (uid != AID_ROOT && uid != AID_GRAPHICS && uid != AID_SYSTEM && uid != AID_SHELL) {
+        ALOGE("Permission denied when trying to mirror display");
+        return PERMISSION_DENIED;
+    }
+
+    ui::LayerStack layerStack;
+    sp<Layer> rootMirrorLayer;
+    status_t result = 0;
+
+    {
+        Mutex::Autolock lock(mStateLock);
+
+        const auto display = getDisplayDeviceLocked(displayId);
+        if (!display) {
+            return NAME_NOT_FOUND;
+        }
+
+        layerStack = display->getLayerStack();
+        LayerCreationArgs mirrorArgs = args;
+        mirrorArgs.flags |= ISurfaceComposerClient::eNoColorFill;
+        result = createEffectLayer(mirrorArgs, outHandle, &rootMirrorLayer);
+        *outLayerId = rootMirrorLayer->sequence;
+        result |= addClientLayer(args.client, *outHandle, rootMirrorLayer /* layer */,
+                                 nullptr /* parent */, true /* addToRoot */,
+                                 nullptr /* outTransformHint */);
+    }
+
+    if (result != NO_ERROR) {
+        return result;
+    }
+
+    if (mTransactionTracing) {
+        mTransactionTracing->onLayerAdded((*outHandle)->localBinder(), *outLayerId, args.name,
+                                          args.flags, -1 /* parentId */);
+    }
+
+    {
+        std::scoped_lock<std::mutex> lock(mMirrorDisplayLock);
+        mMirrorDisplays.emplace_back(layerStack, *outHandle, args.client);
+    }
+
+    setTransactionFlags(eTransactionFlushNeeded);
+    return NO_ERROR;
+}
+
 status_t SurfaceFlinger::createLayer(LayerCreationArgs& args, sp<IBinder>* outHandle,
                                      const sp<IBinder>& parentHandle, int32_t* outLayerId,
                                      const sp<Layer>& parentLayer, uint32_t* outTransformHint) {
@@ -7127,6 +7177,45 @@
     return buffer;
 }
 
+bool SurfaceFlinger::commitMirrorDisplays(int64_t vsyncId) {
+    std::vector<MirrorDisplayState> mirrorDisplays;
+    {
+        std::scoped_lock<std::mutex> lock(mMirrorDisplayLock);
+        mirrorDisplays = std::move(mMirrorDisplays);
+        mMirrorDisplays.clear();
+        if (mirrorDisplays.size() == 0) {
+            return false;
+        }
+    }
+
+    sp<IBinder> unused;
+    for (const auto& mirrorDisplay : mirrorDisplays) {
+        // Set mirror layer's default layer stack to -1 so it doesn't end up rendered on a display
+        // accidentally.
+        sp<Layer> rootMirrorLayer = Layer::fromHandle(mirrorDisplay.rootHandle).promote();
+        rootMirrorLayer->setLayerStack(ui::LayerStack::fromValue(-1));
+        for (const auto& layer : mDrawingState.layersSortedByZ) {
+            if (layer->getLayerStack() != mirrorDisplay.layerStack ||
+                layer->isInternalDisplayOverlay()) {
+                continue;
+            }
+
+            LayerCreationArgs mirrorArgs(this, mirrorDisplay.client, "MirrorLayerParent",
+                                         ISurfaceComposerClient::eNoColorFill,
+                                         gui::LayerMetadata());
+            sp<Layer> childMirror;
+            createEffectLayer(mirrorArgs, &unused, &childMirror);
+            childMirror->setClonedChild(layer->createClone());
+            if (mTransactionTracing) {
+                mTransactionTracing->onLayerAddedToDrawingState(childMirror->getSequence(),
+                                                                vsyncId);
+            }
+            childMirror->reparent(mirrorDisplay.rootHandle);
+        }
+    }
+    return true;
+}
+
 bool SurfaceFlinger::commitCreatedLayers(int64_t vsyncId) {
     std::vector<LayerCreatedState> createdLayers;
     {