diff --git a/libs/gui/IGraphicBufferProducer.cpp b/libs/gui/IGraphicBufferProducer.cpp
index 0f461e5..16d8c05 100644
--- a/libs/gui/IGraphicBufferProducer.cpp
+++ b/libs/gui/IGraphicBufferProducer.cpp
@@ -34,6 +34,8 @@
     REQUEST_BUFFER = IBinder::FIRST_CALL_TRANSACTION,
     SET_BUFFER_COUNT,
     DEQUEUE_BUFFER,
+    DETACH_BUFFER,
+    ATTACH_BUFFER,
     QUEUE_BUFFER,
     CANCEL_BUFFER,
     QUERY,
@@ -106,6 +108,31 @@
         return result;
     }
 
+    virtual status_t detachBuffer(int slot) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
+        data.writeInt32(slot);
+        status_t result = remote()->transact(DETACH_BUFFER, data, &reply);
+        if (result != NO_ERROR) {
+            return result;
+        }
+        result = reply.readInt32();
+        return result;
+    }
+
+    virtual status_t attachBuffer(int* slot, const sp<GraphicBuffer>& buffer) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
+        data.write(*buffer.get());
+        status_t result = remote()->transact(ATTACH_BUFFER, data, &reply);
+        if (result != NO_ERROR) {
+            return result;
+        }
+        *slot = reply.readInt32();
+        result = reply.readInt32();
+        return result;
+    }
+
     virtual status_t queueBuffer(int buf,
             const QueueBufferInput& input, QueueBufferOutput* output) {
         Parcel data, reply;
@@ -216,6 +243,23 @@
             reply->writeInt32(result);
             return NO_ERROR;
         } break;
+        case DETACH_BUFFER: {
+            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
+            int slot = data.readInt32();
+            int result = detachBuffer(slot);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
+        case ATTACH_BUFFER: {
+            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
+            sp<GraphicBuffer> buffer = new GraphicBuffer();
+            data.read(*buffer.get());
+            int slot;
+            int result = attachBuffer(&slot, buffer);
+            reply->writeInt32(slot);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
         case QUEUE_BUFFER: {
             CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
             int buf = data.readInt32();