diff --git a/include/gui/BufferQueue.h b/include/gui/BufferQueue.h
index 7eaf842..867486b 100644
--- a/include/gui/BufferQueue.h
+++ b/include/gui/BufferQueue.h
@@ -67,6 +67,7 @@
         virtual ~ProxyConsumerListener();
         virtual void onFrameAvailable();
         virtual void onBuffersReleased();
+        virtual void onSidebandStreamChanged();
     private:
         // mConsumerListener is a weak reference to the IConsumerListener.  This is
         // the raison d'etre of ProxyConsumerListener.
@@ -204,6 +205,18 @@
     // connected to the specified producer API.
     virtual status_t disconnect(int api);
 
+    // Attaches a sideband buffer stream to the BufferQueue.
+    //
+    // A sideband stream is a device-specific mechanism for passing buffers
+    // from the producer to the consumer without using dequeueBuffer/
+    // queueBuffer. If a sideband stream is present, the consumer can choose
+    // whether to acquire buffers from the sideband stream or from the queued
+    // buffers.
+    //
+    // Passing NULL or a different stream handle will detach the previous
+    // handle if any.
+    virtual status_t setSidebandStream(const sp<NativeHandle>& stream);
+
     /*
      * IGraphicBufferConsumer interface
      */
@@ -306,6 +319,9 @@
     // NATIVE_WINDOW_TRANSFORM_ROT_90.  The default is 0 (no transform).
     virtual status_t setTransformHint(uint32_t hint);
 
+    // Retrieve the BufferQueue's sideband stream, if any.
+    virtual sp<NativeHandle> getSidebandStream() const;
+
     // dump our state in a String
     virtual void dump(String8& result, const char* prefix) const;
 
diff --git a/include/gui/BufferQueueConsumer.h b/include/gui/BufferQueueConsumer.h
index 20db98c..2bdcf28 100644
--- a/include/gui/BufferQueueConsumer.h
+++ b/include/gui/BufferQueueConsumer.h
@@ -133,6 +133,9 @@
     // NATIVE_WINDOW_TRANSFORM_ROT_90.  The default is 0 (no transform).
     virtual status_t setTransformHint(uint32_t hint);
 
+    // Retrieve the sideband buffer stream, if any.
+    virtual sp<NativeHandle> getSidebandStream() const;
+
     // dump our state in a String
     virtual void dump(String8& result, const char* prefix) const;
 
diff --git a/include/gui/BufferQueueCore.h b/include/gui/BufferQueueCore.h
index f4341f8..89f2779 100644
--- a/include/gui/BufferQueueCore.h
+++ b/include/gui/BufferQueueCore.h
@@ -22,6 +22,7 @@
 
 #include <utils/Condition.h>
 #include <utils/Mutex.h>
+#include <utils/NativeHandle.h>
 #include <utils/RefBase.h>
 #include <utils/String8.h>
 #include <utils/StrongPointer.h>
@@ -230,6 +231,9 @@
     // mTransformHint is used to optimize for screen rotations.
     uint32_t mTransformHint;
 
+    // mSidebandStream is a handle to the sideband buffer stream, if any
+    sp<NativeHandle> mSidebandStream;
+
 }; // class BufferQueueCore
 
 } // namespace android
diff --git a/include/gui/BufferQueueProducer.h b/include/gui/BufferQueueProducer.h
index 8912097..250d33c 100644
--- a/include/gui/BufferQueueProducer.h
+++ b/include/gui/BufferQueueProducer.h
@@ -147,6 +147,18 @@
     // connected to the specified producer API.
     virtual status_t disconnect(int api);
 
+    // Attaches a sideband buffer stream to the IGraphicBufferProducer.
+    //
+    // A sideband stream is a device-specific mechanism for passing buffers
+    // from the producer to the consumer without using dequeueBuffer/
+    // queueBuffer. If a sideband stream is present, the consumer can choose
+    // whether to acquire buffers from the sideband stream or from the queued
+    // buffers.
+    //
+    // Passing NULL or a different stream handle will detach the previous
+    // handle if any.
+    virtual status_t setSidebandStream(const sp<NativeHandle>& stream);
+
 private:
     // This is required by the IBinder::DeathRecipient interface
     virtual void binderDied(const wp<IBinder>& who);
diff --git a/include/gui/ConsumerBase.h b/include/gui/ConsumerBase.h
index fb21185..100bb26 100644
--- a/include/gui/ConsumerBase.h
+++ b/include/gui/ConsumerBase.h
@@ -101,11 +101,14 @@
 
     // Implementation of the IConsumerListener interface.  These
     // calls are used to notify the ConsumerBase of asynchronous events in the
-    // BufferQueue.  These methods should not need to be overridden by derived
-    // classes, but if they are overridden the ConsumerBase implementation
-    // must be called from the derived class.
+    // BufferQueue.  The onFrameAvailable and onBuffersReleased methods should
+    // not need to be overridden by derived classes, but if they are overridden
+    // the ConsumerBase implementation must be called from the derived class.
+    // The ConsumerBase version of onSidebandStreamChanged does nothing and can
+    // be overriden by derived classes if they want the notification.
     virtual void onFrameAvailable();
     virtual void onBuffersReleased();
+    virtual void onSidebandStreamChanged();
 
     // freeBufferLocked frees up the given buffer slot.  If the slot has been
     // initialized this will release the reference to the GraphicBuffer in that
diff --git a/include/gui/IConsumerListener.h b/include/gui/IConsumerListener.h
index ac2f9bb..260099e 100644
--- a/include/gui/IConsumerListener.h
+++ b/include/gui/IConsumerListener.h
@@ -57,6 +57,12 @@
     // This is called without any lock held and can be called concurrently
     // by multiple threads.
     virtual void onBuffersReleased() = 0; /* Asynchronous */
+
+    // onSidebandStreamChanged is called to notify the buffer consumer that the
+    // BufferQueue's sideband buffer stream has changed. This is called when a
+    // stream is first attached and when it is either detached or replaced by a
+    // different stream.
+    virtual void onSidebandStreamChanged() = 0; /* Asynchronous */
 };
 
 
diff --git a/include/gui/IGraphicBufferConsumer.h b/include/gui/IGraphicBufferConsumer.h
index 9a6645c..67b2b04 100644
--- a/include/gui/IGraphicBufferConsumer.h
+++ b/include/gui/IGraphicBufferConsumer.h
@@ -30,9 +30,10 @@
 namespace android {
 // ----------------------------------------------------------------------------
 
-class IConsumerListener;
-class GraphicBuffer;
 class Fence;
+class GraphicBuffer;
+class IConsumerListener;
+class NativeHandle;
 
 class IGraphicBufferConsumer : public IInterface {
 
@@ -266,6 +267,9 @@
     // Return of a value other than NO_ERROR means an unknown error has occurred.
     virtual status_t setTransformHint(uint32_t hint) = 0;
 
+    // Retrieve the sideband buffer stream, if any.
+    virtual sp<NativeHandle> getSidebandStream() const = 0;
+
     // dump state into a string
     virtual void dump(String8& result, const char* prefix) const = 0;
 
diff --git a/include/gui/IGraphicBufferProducer.h b/include/gui/IGraphicBufferProducer.h
index 7002530..3fe564d 100644
--- a/include/gui/IGraphicBufferProducer.h
+++ b/include/gui/IGraphicBufferProducer.h
@@ -32,6 +32,7 @@
 namespace android {
 // ----------------------------------------------------------------------------
 
+class NativeHandle;
 class Surface;
 
 /*
@@ -347,6 +348,18 @@
     //             * api was out of range (see above).
     // * DEAD_OBJECT - the token is hosted by an already-dead process
     virtual status_t disconnect(int api) = 0;
+
+    // Attaches a sideband buffer stream to the IGraphicBufferProducer.
+    //
+    // A sideband stream is a device-specific mechanism for passing buffers
+    // from the producer to the consumer without using dequeueBuffer/
+    // queueBuffer. If a sideband stream is present, the consumer can choose
+    // whether to acquire buffers from the sideband stream or from the queued
+    // buffers.
+    //
+    // Passing NULL or a different stream handle will detach the previous
+    // handle if any.
+    virtual status_t setSidebandStream(const sp<NativeHandle>& stream) = 0;
 };
 
 // ----------------------------------------------------------------------------
diff --git a/include/gui/Surface.h b/include/gui/Surface.h
index 6f8a97c..d8e9756 100644
--- a/include/gui/Surface.h
+++ b/include/gui/Surface.h
@@ -78,6 +78,19 @@
         return surface != NULL && surface->getIGraphicBufferProducer() != NULL;
     }
 
+    /* Attaches a sideband buffer stream to the Surface's IGraphicBufferProducer.
+     *
+     * A sideband stream is a device-specific mechanism for passing buffers
+     * from the producer to the consumer without using dequeueBuffer/
+     * queueBuffer. If a sideband stream is present, the consumer can choose
+     * whether to acquire buffers from the sideband stream or from the queued
+     * buffers.
+     *
+     * Passing NULL or a different stream handle will detach the previous
+     * handle if any.
+     */
+    void setSidebandStream(const sp<NativeHandle>& stream);
+
 protected:
     virtual ~Surface();