diff --git a/Android.bp b/Android.bp
index f281faf..aed6b47 100644
--- a/Android.bp
+++ b/Android.bp
@@ -6,6 +6,7 @@
     "graphics/allocator/2.0",
     "graphics/allocator/2.0/default",
     "graphics/mapper/2.0",
+    "graphics/mapper/2.0/default",
     "memtrack/1.0",
     "memtrack/1.0/default",
     "nfc/1.0",
diff --git a/graphics/mapper/2.0/default/Android.bp b/graphics/mapper/2.0/default/Android.bp
new file mode 100644
index 0000000..b738ae8
--- /dev/null
+++ b/graphics/mapper/2.0/default/Android.bp
@@ -0,0 +1,28 @@
+// Copyright (C) 2016 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+cc_library_shared {
+    name: "android.hardware.graphics.mapper.hallib",
+    relative_install_path: "hw",
+    srcs: ["GrallocMapper.cpp"],
+    cppflags: ["-Wall", "-Wextra"],
+    static_libs: ["android.hardware.graphics.mapper@2.0"],
+    shared_libs: [
+        "android.hardware.graphics.allocator@2.0",
+        "libhardware",
+        "libhidl",
+        "libhwbinder",
+        "liblog",
+    ],
+}
diff --git a/graphics/mapper/2.0/default/GrallocMapper.cpp b/graphics/mapper/2.0/default/GrallocMapper.cpp
new file mode 100644
index 0000000..eeca5c7
--- /dev/null
+++ b/graphics/mapper/2.0/default/GrallocMapper.cpp
@@ -0,0 +1,373 @@
+/*
+ * Copyright 2016 The Android Open Source Project
+ * * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "GrallocMapperPassthrough"
+
+#include <android/hardware/graphics/mapper/2.0/IMapper.h>
+#include <hardware/gralloc1.h>
+#include <log/log.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace mapper {
+namespace V2_0 {
+namespace implementation {
+
+class GrallocDevice : public Device {
+public:
+    GrallocDevice();
+    ~GrallocDevice();
+
+    // IMapper interface
+    Error retain(const native_handle_t* bufferHandle);
+    Error release(const native_handle_t* bufferHandle);
+    Error getDimensions(const native_handle_t* bufferHandle,
+            uint32_t* outWidth, uint32_t* outHeight);
+    Error getFormat(const native_handle_t* bufferHandle,
+            PixelFormat* outFormat);
+    Error getProducerUsageMask(const native_handle_t* bufferHandle,
+            uint64_t* outUsageMask);
+    Error getConsumerUsageMask(const native_handle_t* bufferHandle,
+            uint64_t* outUsageMask);
+    Error getBackingStore(const native_handle_t* bufferHandle,
+            BackingStore* outStore);
+    Error getStride(const native_handle_t* bufferHandle, uint32_t* outStride);
+    Error getNumFlexPlanes(const native_handle_t* bufferHandle,
+            uint32_t* outNumPlanes);
+    Error lock(const native_handle_t* bufferHandle,
+            uint64_t producerUsageMask, uint64_t consumerUsageMask,
+            const Rect* accessRegion, int32_t acquireFence, void** outData);
+    Error lockFlex(const native_handle_t* bufferHandle,
+            uint64_t producerUsageMask, uint64_t consumerUsageMask,
+            const Rect* accessRegion, int32_t acquireFence,
+            FlexLayout* outFlexLayout);
+    Error unlock(const native_handle_t* bufferHandle,
+            int32_t* outReleaseFence);
+
+private:
+    void initDispatch();
+
+    gralloc1_device_t* mDevice;
+
+    struct {
+        GRALLOC1_PFN_RETAIN retain;
+        GRALLOC1_PFN_RELEASE release;
+        GRALLOC1_PFN_GET_DIMENSIONS getDimensions;
+        GRALLOC1_PFN_GET_FORMAT getFormat;
+        GRALLOC1_PFN_GET_PRODUCER_USAGE getProducerUsage;
+        GRALLOC1_PFN_GET_CONSUMER_USAGE getConsumerUsage;
+        GRALLOC1_PFN_GET_BACKING_STORE getBackingStore;
+        GRALLOC1_PFN_GET_STRIDE getStride;
+        GRALLOC1_PFN_GET_NUM_FLEX_PLANES getNumFlexPlanes;
+        GRALLOC1_PFN_LOCK lock;
+        GRALLOC1_PFN_LOCK_FLEX lockFlex;
+        GRALLOC1_PFN_UNLOCK unlock;
+    } mDispatch;
+};
+
+GrallocDevice::GrallocDevice()
+{
+    const hw_module_t* module;
+    int status = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
+    if (status) {
+        LOG_ALWAYS_FATAL("failed to get gralloc module");
+    }
+
+    uint8_t major = (module->module_api_version >> 8) & 0xff;
+    if (major != 1) {
+        LOG_ALWAYS_FATAL("unknown gralloc module major version %d", major);
+    }
+
+    status = gralloc1_open(module, &mDevice);
+    if (status) {
+        LOG_ALWAYS_FATAL("failed to open gralloc1 device");
+    }
+
+    initDispatch();
+}
+
+GrallocDevice::~GrallocDevice()
+{
+    gralloc1_close(mDevice);
+}
+
+void GrallocDevice::initDispatch()
+{
+#define CHECK_FUNC(func, desc) do {                                   \
+    mDispatch.func = reinterpret_cast<decltype(mDispatch.func)>(      \
+        mDevice->getFunction(mDevice, desc));                         \
+    if (!mDispatch.func) {                                            \
+        LOG_ALWAYS_FATAL("failed to get gralloc1 function %d", desc); \
+    }                                                                 \
+} while (0)
+
+    CHECK_FUNC(retain, GRALLOC1_FUNCTION_RETAIN);
+    CHECK_FUNC(release, GRALLOC1_FUNCTION_RELEASE);
+    CHECK_FUNC(getDimensions, GRALLOC1_FUNCTION_GET_DIMENSIONS);
+    CHECK_FUNC(getFormat, GRALLOC1_FUNCTION_GET_FORMAT);
+    CHECK_FUNC(getProducerUsage, GRALLOC1_FUNCTION_GET_PRODUCER_USAGE);
+    CHECK_FUNC(getConsumerUsage, GRALLOC1_FUNCTION_GET_CONSUMER_USAGE);
+    CHECK_FUNC(getBackingStore, GRALLOC1_FUNCTION_GET_BACKING_STORE);
+    CHECK_FUNC(getStride, GRALLOC1_FUNCTION_GET_STRIDE);
+    CHECK_FUNC(getNumFlexPlanes, GRALLOC1_FUNCTION_GET_NUM_FLEX_PLANES);
+    CHECK_FUNC(lock, GRALLOC1_FUNCTION_LOCK);
+    CHECK_FUNC(lockFlex, GRALLOC1_FUNCTION_LOCK_FLEX);
+    CHECK_FUNC(unlock, GRALLOC1_FUNCTION_UNLOCK);
+
+#undef CHECK_FUNC
+}
+
+Error GrallocDevice::retain(const native_handle_t* bufferHandle)
+{
+    int32_t error = mDispatch.retain(mDevice, bufferHandle);
+    return static_cast<Error>(error);
+}
+
+Error GrallocDevice::release(const native_handle_t* bufferHandle)
+{
+    int32_t error = mDispatch.release(mDevice, bufferHandle);
+    return static_cast<Error>(error);
+}
+
+Error GrallocDevice::getDimensions(const native_handle_t* bufferHandle,
+        uint32_t* outWidth, uint32_t* outHeight)
+{
+    int32_t error = mDispatch.getDimensions(mDevice, bufferHandle,
+            outWidth, outHeight);
+    return static_cast<Error>(error);
+}
+
+Error GrallocDevice::getFormat(const native_handle_t* bufferHandle,
+        PixelFormat* outFormat)
+{
+    int32_t error = mDispatch.getFormat(mDevice, bufferHandle,
+            reinterpret_cast<int32_t*>(outFormat));
+    return static_cast<Error>(error);
+}
+
+Error GrallocDevice::getProducerUsageMask(const native_handle_t* bufferHandle,
+        uint64_t* outUsageMask)
+{
+    int32_t error = mDispatch.getProducerUsage(mDevice, bufferHandle,
+            outUsageMask);
+    return static_cast<Error>(error);
+}
+
+Error GrallocDevice::getConsumerUsageMask(const native_handle_t* bufferHandle,
+        uint64_t* outUsageMask)
+{
+    int32_t error = mDispatch.getConsumerUsage(mDevice, bufferHandle,
+            outUsageMask);
+    return static_cast<Error>(error);
+}
+
+Error GrallocDevice::getBackingStore(const native_handle_t* bufferHandle,
+        BackingStore* outStore)
+{
+    int32_t error = mDispatch.getBackingStore(mDevice, bufferHandle,
+            outStore);
+    return static_cast<Error>(error);
+}
+
+Error GrallocDevice::getStride(const native_handle_t* bufferHandle,
+        uint32_t* outStride)
+{
+    int32_t error = mDispatch.getStride(mDevice, bufferHandle, outStride);
+    return static_cast<Error>(error);
+}
+
+Error GrallocDevice::getNumFlexPlanes(const native_handle_t* bufferHandle,
+        uint32_t* outNumPlanes)
+{
+    int32_t error = mDispatch.getNumFlexPlanes(mDevice, bufferHandle,
+            outNumPlanes);
+    return static_cast<Error>(error);
+}
+
+Error GrallocDevice::lock(const native_handle_t* bufferHandle,
+        uint64_t producerUsageMask, uint64_t consumerUsageMask,
+        const Rect* accessRegion, int32_t acquireFence,
+        void** outData)
+{
+    int32_t error = mDispatch.lock(mDevice, bufferHandle,
+            producerUsageMask, consumerUsageMask,
+            reinterpret_cast<const gralloc1_rect_t*>(accessRegion),
+            outData, acquireFence);
+    return static_cast<Error>(error);
+}
+
+Error GrallocDevice::lockFlex(const native_handle_t* bufferHandle,
+        uint64_t producerUsageMask, uint64_t consumerUsageMask,
+        const Rect* accessRegion, int32_t acquireFence,
+        FlexLayout* outFlexLayout)
+{
+    int32_t error = mDispatch.lockFlex(mDevice, bufferHandle,
+            producerUsageMask, consumerUsageMask,
+            reinterpret_cast<const gralloc1_rect_t*>(accessRegion),
+            reinterpret_cast<android_flex_layout_t*>(outFlexLayout),
+            acquireFence);
+    return static_cast<Error>(error);
+}
+
+Error GrallocDevice::unlock(const native_handle_t* bufferHandle,
+        int32_t* outReleaseFence)
+{
+    int32_t error = mDispatch.unlock(mDevice, bufferHandle, outReleaseFence);
+    return static_cast<Error>(error);
+}
+
+class GrallocMapper : public IMapper {
+public:
+    GrallocMapper() : IMapper{
+        .createDevice = createDevice,
+        .destroyDevice = destroyDevice,
+        .retain = retain,
+        .release = release,
+        .getDimensions = getDimensions,
+        .getFormat = getFormat,
+        .getProducerUsageMask = getProducerUsageMask,
+        .getConsumerUsageMask = getConsumerUsageMask,
+        .getBackingStore = getBackingStore,
+        .getStride = getStride,
+        .getNumFlexPlanes = getNumFlexPlanes,
+        .lock = lock,
+        .lockFlex = lockFlex,
+        .unlock = unlock,
+    } {}
+
+    const IMapper* getInterface() const
+    {
+        return static_cast<const IMapper*>(this);
+    }
+
+private:
+    static GrallocDevice* cast(Device* device)
+    {
+        return reinterpret_cast<GrallocDevice*>(device);
+    }
+
+    static Error createDevice(Device** outDevice)
+    {
+        *outDevice = new GrallocDevice;
+        return Error::NONE;
+    }
+
+    static Error destroyDevice(Device* device)
+    {
+        delete cast(device);
+        return Error::NONE;
+    }
+
+    static Error retain(Device* device,
+            const native_handle_t* bufferHandle)
+    {
+        return cast(device)->retain(bufferHandle);
+    }
+
+    static Error release(Device* device,
+            const native_handle_t* bufferHandle)
+    {
+        return cast(device)->release(bufferHandle);
+    }
+
+    static Error getDimensions(Device* device,
+            const native_handle_t* bufferHandle,
+            uint32_t* outWidth, uint32_t* outHeight)
+    {
+        return cast(device)->getDimensions(bufferHandle, outWidth, outHeight);
+    }
+
+    static Error getFormat(Device* device,
+            const native_handle_t* bufferHandle, PixelFormat* outFormat)
+    {
+        return cast(device)->getFormat(bufferHandle, outFormat);
+    }
+
+    static Error getProducerUsageMask(Device* device,
+            const native_handle_t* bufferHandle, uint64_t* outUsageMask)
+    {
+        return cast(device)->getProducerUsageMask(bufferHandle, outUsageMask);
+    }
+
+    static Error getConsumerUsageMask(Device* device,
+            const native_handle_t* bufferHandle, uint64_t* outUsageMask)
+    {
+        return cast(device)->getConsumerUsageMask(bufferHandle, outUsageMask);
+    }
+
+    static Error getBackingStore(Device* device,
+            const native_handle_t* bufferHandle, BackingStore* outStore)
+    {
+        return cast(device)->getBackingStore(bufferHandle, outStore);
+    }
+
+    static Error getStride(Device* device,
+            const native_handle_t* bufferHandle, uint32_t* outStride)
+    {
+        return cast(device)->getStride(bufferHandle, outStride);
+    }
+
+    static Error getNumFlexPlanes(Device* device,
+            const native_handle_t* bufferHandle, uint32_t* outNumPlanes)
+    {
+        return cast(device)->getNumFlexPlanes(bufferHandle, outNumPlanes);
+    }
+
+    static Error lock(Device* device,
+            const native_handle_t* bufferHandle,
+            uint64_t producerUsageMask, uint64_t consumerUsageMask,
+            const Device::Rect* accessRegion, int32_t acquireFence,
+            void** outData)
+    {
+        return cast(device)->lock(bufferHandle,
+                producerUsageMask, consumerUsageMask,
+                accessRegion, acquireFence, outData);
+    }
+
+    static Error lockFlex(Device* device,
+            const native_handle_t* bufferHandle,
+            uint64_t producerUsageMask, uint64_t consumerUsageMask,
+            const Device::Rect* accessRegion, int32_t acquireFence,
+            FlexLayout* outFlexLayout)
+    {
+        return cast(device)->lockFlex(bufferHandle,
+                producerUsageMask, consumerUsageMask,
+                accessRegion, acquireFence, outFlexLayout);
+    }
+
+    static Error unlock(Device* device,
+            const native_handle_t* bufferHandle, int32_t* outReleaseFence)
+    {
+        return cast(device)->unlock(bufferHandle, outReleaseFence);
+    }
+};
+
+extern "C" const void* HALLIB_FETCH_Interface(const char* name)
+{
+    if (strcmp(name, "android.hardware.graphics.mapper@2.0::IMapper") == 0) {
+        static GrallocMapper sGrallocMapper;
+        return sGrallocMapper.getInterface();
+    }
+
+    return nullptr;
+}
+
+} // namespace implementation
+} // namespace V2_0
+} // namespace mapper
+} // namespace graphics
+} // namespace hardware
+} // namespace android