diff --git a/services/surfaceflinger/Android.mk b/services/surfaceflinger/Android.mk
index f5a4114..c028483 100644
--- a/services/surfaceflinger/Android.mk
+++ b/services/surfaceflinger/Android.mk
@@ -20,6 +20,7 @@
     SurfaceFlingerConsumer.cpp \
     SurfaceInterceptor.cpp \
     Transform.cpp \
+    DisplayHardware/ComposerHal.cpp \
     DisplayHardware/FramebufferSurface.cpp \
     DisplayHardware/HWC2.cpp \
     DisplayHardware/HWC2On1Adapter.cpp \
@@ -129,10 +130,14 @@
 
 LOCAL_STATIC_LIBRARIES := libtrace_proto libvkjson
 LOCAL_SHARED_LIBRARIES := \
+    android.hardware.graphics.allocator@2.0 \
+    android.hardware.graphics.composer@2.1 \
     libcutils \
     liblog \
     libdl \
     libhardware \
+    libhidl \
+    libhwbinder \
     libutils \
     libEGL \
     libGLESv1_CM \
@@ -149,6 +154,12 @@
     libutils \
     android.hardware.power@1.0
 
+LOCAL_EXPORT_SHARED_LIBRARY_HEADERS := \
+    android.hardware.graphics.allocator@2.0 \
+    android.hardware.graphics.composer@2.1 \
+    libhidl \
+    libhwbinder
+
 LOCAL_CFLAGS += -Wall -Werror -Wunused -Wunreachable-code
 
 include $(BUILD_SHARED_LIBRARY)
diff --git a/services/surfaceflinger/DisplayHardware/ComposerHal.cpp b/services/surfaceflinger/DisplayHardware/ComposerHal.cpp
new file mode 100644
index 0000000..128e2b0
--- /dev/null
+++ b/services/surfaceflinger/DisplayHardware/ComposerHal.cpp
@@ -0,0 +1,650 @@
+/*
+ * 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.
+ */
+
+#undef LOG_TAG
+#define LOG_TAG "HwcComposer"
+
+#include <inttypes.h>
+#include <log/log.h>
+
+#include "ComposerHal.h"
+
+namespace android {
+
+using hardware::Return;
+using hardware::hidl_vec;
+
+namespace Hwc2 {
+
+namespace {
+
+class BufferHandle {
+public:
+    BufferHandle(const native_handle_t* buffer)
+    {
+        // nullptr is not a valid handle to HIDL
+        mHandle = (buffer) ? buffer : native_handle_init(mStorage, 0, 0);
+    }
+
+    operator const native_handle_t*() const
+    {
+        return mHandle;
+    }
+
+private:
+    NATIVE_HANDLE_DECLARE_STORAGE(mStorage, 0, 0);
+    const native_handle_t* mHandle;
+};
+
+class FenceHandle
+{
+public:
+    FenceHandle(int fd, bool owned)
+        : mOwned(owned)
+    {
+        if (fd >= 0) {
+            mHandle = native_handle_init(mStorage, 1, 0);
+            mHandle->data[0] = fd;
+        } else {
+            // nullptr is not a valid handle to HIDL
+            mHandle = native_handle_init(mStorage, 0, 0);
+        }
+    }
+
+    ~FenceHandle()
+    {
+        if (mOwned) {
+            native_handle_close(mHandle);
+        }
+    }
+
+    operator const native_handle_t*() const
+    {
+        return mHandle;
+    }
+
+private:
+    bool mOwned;
+    NATIVE_HANDLE_DECLARE_STORAGE(mStorage, 1, 0);
+    native_handle_t* mHandle;
+};
+
+// assume NO_RESOURCES when Status::isOk returns false
+constexpr Error kDefaultError = Error::NO_RESOURCES;
+
+template<typename T, typename U>
+T unwrapRet(Return<T>& ret, const U& default_val)
+{
+    return (ret.getStatus().isOk()) ? static_cast<T>(ret) :
+        static_cast<T>(default_val);
+}
+
+Error unwrapRet(Return<Error>& ret)
+{
+    return unwrapRet(ret, kDefaultError);
+}
+
+template<typename T>
+void assignFromHidlVec(std::vector<T>& vec, const hidl_vec<T>& data)
+{
+    vec.clear();
+    vec.insert(vec.begin(), &data[0], &data[data.size()]);
+}
+
+} // anonymous namespace
+
+Composer::Composer()
+{
+    mService = IComposer::getService("hwcomposer");
+    if (mService == nullptr) {
+        LOG_ALWAYS_FATAL("failed to get hwcomposer service");
+    }
+}
+
+std::vector<IComposer::Capability> Composer::getCapabilities() const
+{
+    std::vector<IComposer::Capability> capabilities;
+    mService->getCapabilities(
+            [&](const auto& tmpCapabilities) {
+                assignFromHidlVec(capabilities, tmpCapabilities);
+            });
+
+    return capabilities;
+}
+
+std::string Composer::dumpDebugInfo() const
+{
+    std::string info;
+    mService->dumpDebugInfo([&](const auto& tmpInfo) {
+        info = tmpInfo.c_str();
+    });
+
+    return info;
+}
+
+void Composer::registerCallback(const sp<IComposerCallback>& callback) const
+{
+    auto ret = mService->registerCallback(callback);
+    if (!ret.getStatus().isOk()) {
+        ALOGE("failed to register IComposerCallback");
+    }
+}
+
+uint32_t Composer::getMaxVirtualDisplayCount() const
+{
+    auto ret = mService->getMaxVirtualDisplayCount();
+    return unwrapRet(ret, 0);
+}
+
+Error Composer::createVirtualDisplay(uint32_t width, uint32_t height,
+            PixelFormat& format, Display& display) const
+{
+    Error error = kDefaultError;
+    mService->createVirtualDisplay(width, height, format,
+            [&](const auto& tmpError, const auto& tmpDisplay,
+                const auto& tmpFormat) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                display = tmpDisplay;
+                format = tmpFormat;
+            });
+
+    return error;
+}
+
+Error Composer::destroyVirtualDisplay(Display display) const
+{
+    auto ret = mService->destroyVirtualDisplay(display);
+    return unwrapRet(ret);
+}
+
+Error Composer::acceptDisplayChanges(Display display) const
+{
+    auto ret = mService->acceptDisplayChanges(display);
+    return unwrapRet(ret);
+}
+
+Error Composer::createLayer(Display display, Layer& layer) const
+{
+    Error error = kDefaultError;
+    mService->createLayer(display,
+            [&](const auto& tmpError, const auto& tmpLayer) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                layer = tmpLayer;
+            });
+
+    return error;
+}
+
+Error Composer::destroyLayer(Display display, Layer layer) const
+{
+    auto ret = mService->destroyLayer(display, layer);
+    return unwrapRet(ret);
+}
+
+Error Composer::getActiveConfig(Display display, Config& config) const
+{
+    Error error = kDefaultError;
+    mService->getActiveConfig(display,
+            [&](const auto& tmpError, const auto& tmpConfig) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                config = tmpConfig;
+            });
+
+    return error;
+}
+
+Error Composer::getChangedCompositionTypes(Display display,
+        std::vector<Layer>& layers,
+        std::vector<IComposer::Composition>& types) const
+{
+    Error error = kDefaultError;
+    mService->getChangedCompositionTypes(display,
+            [&](const auto& tmpError, const auto& tmpLayers,
+                const auto& tmpTypes) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                assignFromHidlVec(layers, tmpLayers);
+                assignFromHidlVec(types, tmpTypes);
+            });
+
+    return error;
+}
+
+Error Composer::getColorModes(Display display,
+        std::vector<ColorMode>& modes) const
+{
+    Error error = kDefaultError;
+    mService->getColorModes(display,
+            [&](const auto& tmpError, const auto& tmpModes) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                assignFromHidlVec(modes, tmpModes);
+            });
+
+    return error;
+}
+
+Error Composer::getDisplayAttribute(Display display, Config config,
+        IComposer::Attribute attribute, int32_t& value) const
+{
+    Error error = kDefaultError;
+    mService->getDisplayAttribute(display, config, attribute,
+            [&](const auto& tmpError, const auto& tmpValue) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                value = tmpValue;
+            });
+
+    return error;
+}
+
+Error Composer::getDisplayConfigs(Display display,
+        std::vector<Config>& configs) const
+{
+    Error error = kDefaultError;
+    mService->getDisplayConfigs(display,
+            [&](const auto& tmpError, const auto& tmpConfigs) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                assignFromHidlVec(configs, tmpConfigs);
+            });
+
+    return error;
+}
+
+Error Composer::getDisplayName(Display display, std::string& name) const
+{
+    Error error = kDefaultError;
+    mService->getDisplayName(display,
+            [&](const auto& tmpError, const auto& tmpName) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                name = tmpName.c_str();
+            });
+
+    return error;
+}
+
+Error Composer::getDisplayRequests(Display display,
+        uint32_t& displayRequestMask, std::vector<Layer>& layers,
+        std::vector<uint32_t>& layerRequestMasks) const
+{
+    Error error = kDefaultError;
+    mService->getDisplayRequests(display,
+            [&](const auto& tmpError, const auto& tmpDisplayRequestMask,
+                const auto& tmpLayers, const auto& tmpLayerRequestMasks) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                displayRequestMask = tmpDisplayRequestMask;
+                assignFromHidlVec(layers, tmpLayers);
+                assignFromHidlVec(layerRequestMasks, tmpLayerRequestMasks);
+            });
+
+    return error;
+}
+
+Error Composer::getDisplayType(Display display, IComposer::DisplayType& type) const
+{
+    Error error = kDefaultError;
+    mService->getDisplayType(display,
+            [&](const auto& tmpError, const auto& tmpType) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                type = tmpType;
+            });
+
+    return error;
+}
+
+Error Composer::getDozeSupport(Display display, bool& support) const
+{
+    Error error = kDefaultError;
+    mService->getDozeSupport(display,
+            [&](const auto& tmpError, const auto& tmpSupport) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                support = tmpSupport;
+            });
+
+    return error;
+}
+
+Error Composer::getHdrCapabilities(Display display, std::vector<Hdr>& types,
+        float& maxLuminance, float& maxAverageLuminance,
+        float& minLuminance) const
+{
+    Error error = kDefaultError;
+    mService->getHdrCapabilities(display,
+            [&](const auto& tmpError, const auto& tmpTypes,
+                const auto& tmpMaxLuminance,
+                const auto& tmpMaxAverageLuminance,
+                const auto& tmpMinLuminance) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                assignFromHidlVec(types, tmpTypes);
+                maxLuminance = tmpMaxLuminance;
+                maxAverageLuminance = tmpMaxAverageLuminance;
+                minLuminance = tmpMinLuminance;
+            });
+
+    return error;
+}
+
+Error Composer::getReleaseFences(Display display, std::vector<Layer>& layers,
+        std::vector<int>& releaseFences) const
+{
+    Error error = kDefaultError;
+    mService->getReleaseFences(display,
+            [&](const auto& tmpError, const auto& tmpLayers,
+                const auto& tmpReleaseFences) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                if (static_cast<int>(tmpLayers.size()) !=
+                        tmpReleaseFences->numFds) {
+                    ALOGE("invalid releaseFences outputs: "
+                          "layer count %zu != fence count %d",
+                          tmpLayers.size(), tmpReleaseFences->numFds);
+                    error = Error::NO_RESOURCES;
+                    return;
+                }
+
+                // dup the file descriptors
+                std::vector<int> tmpFds;
+                tmpFds.reserve(tmpReleaseFences->numFds);
+                for (int i = 0; i < tmpReleaseFences->numFds; i++) {
+                    int fd = dup(tmpReleaseFences->data[i]);
+                    if (fd < 0) {
+                        break;
+                    }
+                    tmpFds.push_back(fd);
+                }
+                if (static_cast<int>(tmpFds.size()) <
+                        tmpReleaseFences->numFds) {
+                    for (auto fd : tmpFds) {
+                        close(fd);
+                    }
+
+                    error = Error::NO_RESOURCES;
+                    return;
+                }
+
+                assignFromHidlVec(layers, tmpLayers);
+                releaseFences = std::move(tmpFds);
+            });
+
+    return error;
+}
+
+Error Composer::presentDisplay(Display display, int& presentFence) const
+{
+    Error error = kDefaultError;
+    mService->presentDisplay(display,
+            [&](const auto& tmpError, const auto& tmpPresentFence) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                if (tmpPresentFence->numFds == 1) {
+                    int fd = dup(tmpPresentFence->data[0]);
+                    if (fd >= 0) {
+                        presentFence = fd;
+                    } else {
+                        error = Error::NO_RESOURCES;
+                    }
+                } else {
+                    presentFence = -1;
+                }
+            });
+
+    return error;
+}
+
+Error Composer::setActiveConfig(Display display, Config config) const
+{
+    auto ret = mService->setActiveConfig(display, config);
+    return unwrapRet(ret);
+}
+
+Error Composer::setClientTarget(Display display, const native_handle_t* target,
+        int acquireFence, Dataspace dataspace,
+        const std::vector<IComposer::Rect>& damage) const
+{
+    BufferHandle tmpTarget(target);
+    FenceHandle tmpAcquireFence(acquireFence, true);
+
+    hidl_vec<IComposer::Rect> tmpDamage;
+    tmpDamage.setToExternal(const_cast<IComposer::Rect*>(damage.data()),
+            damage.size());
+
+    auto ret = mService->setClientTarget(display, tmpTarget,
+            tmpAcquireFence, dataspace, tmpDamage);
+    return unwrapRet(ret);
+}
+
+Error Composer::setColorMode(Display display, ColorMode mode) const
+{
+    auto ret = mService->setColorMode(display, mode);
+    return unwrapRet(ret);
+}
+
+Error Composer::setColorTransform(Display display, const float* matrix,
+        ColorTransform hint) const
+{
+    hidl_vec<float> tmpMatrix;
+    tmpMatrix.setToExternal(const_cast<float*>(matrix), 16);
+
+    auto ret = mService->setColorTransform(display, tmpMatrix, hint);
+    return unwrapRet(ret);
+}
+
+Error Composer::setOutputBuffer(Display display, const native_handle_t* buffer,
+        int releaseFence) const
+{
+    BufferHandle tmpBuffer(buffer);
+    FenceHandle tmpReleaseFence(releaseFence, false);
+
+    auto ret = mService->setOutputBuffer(display, tmpBuffer, tmpReleaseFence);
+    return unwrapRet(ret);
+}
+
+Error Composer::setPowerMode(Display display, IComposer::PowerMode mode) const
+{
+    auto ret = mService->setPowerMode(display, mode);
+    return unwrapRet(ret);
+}
+
+Error Composer::setVsyncEnabled(Display display, IComposer::Vsync enabled) const
+{
+    auto ret = mService->setVsyncEnabled(display, enabled);
+    return unwrapRet(ret);
+}
+
+Error Composer::validateDisplay(Display display, uint32_t& numTypes, uint32_t&
+        numRequests) const
+{
+    Error error = kDefaultError;
+    mService->validateDisplay(display,
+            [&](const auto& tmpError, const auto& tmpNumTypes,
+                const auto& tmpNumRequests) {
+                error = tmpError;
+                if (error != Error::NONE) {
+                    return;
+                }
+
+                numTypes = tmpNumTypes;
+                numRequests = tmpNumRequests;
+            });
+
+    return error;
+}
+
+Error Composer::setCursorPosition(Display display, Layer layer,
+        int32_t x, int32_t y) const
+{
+    auto ret = mService->setCursorPosition(display, layer, x, y);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerBuffer(Display display, Layer layer,
+        const native_handle_t* buffer, int acquireFence) const
+{
+    BufferHandle tmpBuffer(buffer);
+    FenceHandle tmpAcquireFence(acquireFence, true);
+
+    auto ret = mService->setLayerBuffer(display, layer,
+            tmpBuffer, tmpAcquireFence);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerSurfaceDamage(Display display, Layer layer,
+        const std::vector<IComposer::Rect>& damage) const
+{
+    hidl_vec<IComposer::Rect> tmpDamage;
+    tmpDamage.setToExternal(const_cast<IComposer::Rect*>(damage.data()),
+            damage.size());
+
+    auto ret = mService->setLayerSurfaceDamage(display, layer, tmpDamage);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerBlendMode(Display display, Layer layer,
+        IComposer::BlendMode mode) const
+{
+    auto ret = mService->setLayerBlendMode(display, layer, mode);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerColor(Display display, Layer layer,
+        const IComposer::Color& color) const
+{
+    auto ret = mService->setLayerColor(display, layer, color);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerCompositionType(Display display, Layer layer,
+        IComposer::Composition type) const
+{
+    auto ret = mService->setLayerCompositionType(display, layer, type);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerDataspace(Display display, Layer layer,
+        Dataspace dataspace) const
+{
+    auto ret = mService->setLayerDataspace(display, layer, dataspace);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerDisplayFrame(Display display, Layer layer,
+        const IComposer::Rect& frame) const
+{
+    auto ret = mService->setLayerDisplayFrame(display, layer, frame);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerPlaneAlpha(Display display, Layer layer,
+        float alpha) const
+{
+    auto ret = mService->setLayerPlaneAlpha(display, layer, alpha);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerSidebandStream(Display display, Layer layer,
+        const native_handle_t* stream) const
+{
+    BufferHandle tmpStream(stream);
+
+    auto ret = mService->setLayerSidebandStream(display, layer, tmpStream);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerSourceCrop(Display display, Layer layer,
+        const IComposer::FRect& crop) const
+{
+    auto ret = mService->setLayerSourceCrop(display, layer, crop);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerTransform(Display display, Layer layer,
+        Transform transform) const
+{
+    auto ret = mService->setLayerTransform(display, layer, transform);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerVisibleRegion(Display display, Layer layer,
+        const std::vector<IComposer::Rect>& visible) const
+{
+    hidl_vec<IComposer::Rect> tmpVisible;
+    tmpVisible.setToExternal(const_cast<IComposer::Rect*>(visible.data()),
+            visible.size());
+
+    auto ret = mService->setLayerVisibleRegion(display, layer, tmpVisible);
+    return unwrapRet(ret);
+}
+
+Error Composer::setLayerZOrder(Display display, Layer layer, uint32_t z) const
+{
+    auto ret = mService->setLayerZOrder(display, layer, z);
+    return unwrapRet(ret);
+}
+
+} // namespace Hwc2
+
+} // namespace android
diff --git a/services/surfaceflinger/DisplayHardware/ComposerHal.h b/services/surfaceflinger/DisplayHardware/ComposerHal.h
new file mode 100644
index 0000000..fd74a92
--- /dev/null
+++ b/services/surfaceflinger/DisplayHardware/ComposerHal.h
@@ -0,0 +1,142 @@
+/*
+ * 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.
+ */
+
+#ifndef ANDROID_SF_COMPOSER_HAL_H
+#define ANDROID_SF_COMPOSER_HAL_H
+
+#include <string>
+#include <vector>
+
+#include <android/hardware/graphics/composer/2.1/IComposer.h>
+#include <utils/StrongPointer.h>
+
+namespace android {
+
+namespace Hwc2 {
+
+using android::hardware::graphics::allocator::V2_0::PixelFormat;
+
+using android::hardware::graphics::composer::V2_1::IComposer;
+using android::hardware::graphics::composer::V2_1::IComposerCallback;
+using android::hardware::graphics::composer::V2_1::Error;
+using android::hardware::graphics::composer::V2_1::Display;
+using android::hardware::graphics::composer::V2_1::Layer;
+using android::hardware::graphics::composer::V2_1::Config;
+
+using android::hardware::graphics::composer::V2_1::ColorMode;
+using android::hardware::graphics::composer::V2_1::Hdr;
+using android::hardware::graphics::composer::V2_1::Dataspace;
+using android::hardware::graphics::composer::V2_1::ColorTransform;
+using android::hardware::graphics::composer::V2_1::Transform;
+
+// Composer is a wrapper to IComposer, a proxy to server-side composer.
+class Composer {
+public:
+    Composer();
+
+    std::vector<IComposer::Capability> getCapabilities() const;
+    std::string dumpDebugInfo() const;
+
+    void registerCallback(const sp<IComposerCallback>& callback) const;
+
+    uint32_t getMaxVirtualDisplayCount() const;
+    Error createVirtualDisplay(uint32_t width, uint32_t height,
+            PixelFormat& format, Display& display) const;
+    Error destroyVirtualDisplay(Display display) const;
+
+    Error acceptDisplayChanges(Display display) const;
+
+    Error createLayer(Display display, Layer& layer) const;
+    Error destroyLayer(Display display, Layer layer) const;
+
+    Error getActiveConfig(Display display, Config& config) const;
+    Error getChangedCompositionTypes(Display display,
+            std::vector<Layer>& layers,
+            std::vector<IComposer::Composition>& types) const;
+    Error getColorModes(Display display, std::vector<ColorMode>& modes) const;
+    Error getDisplayAttribute(Display display, Config config,
+            IComposer::Attribute attribute, int32_t& value) const;
+    Error getDisplayConfigs(Display display,
+            std::vector<Config>& configs) const;
+    Error getDisplayName(Display display, std::string& name) const;
+
+    Error getDisplayRequests(Display display, uint32_t& displayRequestMask,
+            std::vector<Layer>& layers,
+            std::vector<uint32_t>& layerRequestMasks) const;
+
+    Error getDisplayType(Display display, IComposer::DisplayType& type) const;
+    Error getDozeSupport(Display display, bool& support) const;
+    Error getHdrCapabilities(Display display, std::vector<Hdr>& types,
+            float& maxLuminance, float& maxAverageLuminance,
+            float& minLuminance) const;
+
+    Error getReleaseFences(Display display, std::vector<Layer>& layers,
+            std::vector<int>& releaseFences) const;
+
+    Error presentDisplay(Display display, int& presentFence) const;
+
+    Error setActiveConfig(Display display, Config config) const;
+    Error setClientTarget(Display display, const native_handle_t* target,
+            int acquireFence, Dataspace dataspace,
+            const std::vector<IComposer::Rect>& damage) const;
+    Error setColorMode(Display display, ColorMode mode) const;
+    Error setColorTransform(Display display, const float* matrix,
+            ColorTransform hint) const;
+    Error setOutputBuffer(Display display, const native_handle_t* buffer,
+            int releaseFence) const;
+    Error setPowerMode(Display display, IComposer::PowerMode mode) const;
+    Error setVsyncEnabled(Display display, IComposer::Vsync enabled) const;
+
+    Error validateDisplay(Display display, uint32_t& numTypes,
+            uint32_t& numRequests) const;
+
+    Error setCursorPosition(Display display, Layer layer,
+            int32_t x, int32_t y) const;
+    Error setLayerBuffer(Display display, Layer layer,
+            const native_handle_t* buffer, int acquireFence) const;
+    Error setLayerSurfaceDamage(Display display, Layer layer,
+            const std::vector<IComposer::Rect>& damage) const;
+    Error setLayerBlendMode(Display display, Layer layer,
+            IComposer::BlendMode mode) const;
+    Error setLayerColor(Display display, Layer layer,
+            const IComposer::Color& color) const;
+    Error setLayerCompositionType(Display display, Layer layer,
+            IComposer::Composition type) const;
+    Error setLayerDataspace(Display display, Layer layer,
+            Dataspace dataspace) const;
+    Error setLayerDisplayFrame(Display display, Layer layer,
+            const IComposer::Rect& frame) const;
+    Error setLayerPlaneAlpha(Display display, Layer layer,
+            float alpha) const;
+    Error setLayerSidebandStream(Display display, Layer layer,
+            const native_handle_t* stream) const;
+    Error setLayerSourceCrop(Display display, Layer layer,
+            const IComposer::FRect& crop) const;
+    Error setLayerTransform(Display display, Layer layer,
+            Transform transform) const;
+    Error setLayerVisibleRegion(Display display, Layer layer,
+            const std::vector<IComposer::Rect>& visible) const;
+    Error setLayerZOrder(Display display, Layer layer, uint32_t z) const;
+
+private:
+    sp<IComposer> mService;
+};
+
+} // namespace Hwc2
+
+} // namespace android
+
+#endif // ANDROID_SF_COMPOSER_HAL_H
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.cpp b/services/surfaceflinger/DisplayHardware/HWC2.cpp
index 4fe3cfd..c79caf4 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWC2.cpp
@@ -21,6 +21,7 @@
 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
 
 #include "HWC2.h"
+#include "ComposerHal.h"
 
 #include "FloatRect.h"
 
@@ -79,11 +80,16 @@
 using android::Rect;
 using android::Region;
 using android::sp;
+using android::hardware::Return;
+using android::hardware::Void;
 
 namespace HWC2 {
 
+namespace Hwc2 = android::Hwc2;
+
 // Device methods
 
+#ifdef BYPASS_IHWC
 Device::Device(hwc2_device_t* device)
   : mHwcDevice(device),
     mCreateVirtualDisplay(nullptr),
@@ -128,6 +134,10 @@
     mSetLayerTransform(nullptr),
     mSetLayerVisibleRegion(nullptr),
     mSetLayerZOrder(nullptr),
+#else
+Device::Device()
+  : mComposer(std::make_unique<Hwc2::Composer>()),
+#endif // BYPASS_IHWC
     mCapabilities(),
     mDisplays(),
     mHotplug(),
@@ -144,9 +154,11 @@
 
 Device::~Device()
 {
+#ifdef BYPASS_IHWC
     if (mHwcDevice == nullptr) {
         return;
     }
+#endif
 
     for (auto element : mDisplays) {
         auto display = element.second.lock();
@@ -175,13 +187,16 @@
         }
     }
 
+#ifdef BYPASS_IHWC
     hwc2_close(mHwcDevice);
+#endif
 }
 
 // Required by HWC2 device
 
 std::string Device::dump() const
 {
+#ifdef BYPASS_IHWC
     uint32_t numBytes = 0;
     mDump(mHwcDevice, &numBytes, nullptr);
 
@@ -189,11 +204,18 @@
     mDump(mHwcDevice, &numBytes, buffer.data());
 
     return std::string(buffer.data(), buffer.size());
+#else
+    return mComposer->dumpDebugInfo();
+#endif
 }
 
 uint32_t Device::getMaxVirtualDisplayCount() const
 {
+#ifdef BYPASS_IHWC
     return mGetMaxVirtualDisplayCount(mHwcDevice);
+#else
+    return mComposer->getMaxVirtualDisplayCount();
+#endif
 }
 
 Error Device::createVirtualDisplay(uint32_t width, uint32_t height,
@@ -202,9 +224,15 @@
     ALOGI("Creating virtual display");
 
     hwc2_display_t displayId = 0;
+#ifdef BYPASS_IHWC
     int32_t intFormat = static_cast<int32_t>(*format);
     int32_t intError = mCreateVirtualDisplay(mHwcDevice, width, height,
             &intFormat, &displayId);
+#else
+    auto intFormat = static_cast<Hwc2::PixelFormat>(*format);
+    auto intError = mComposer->createVirtualDisplay(width, height,
+            intFormat, displayId);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -315,6 +343,7 @@
 {
     static_assert(sizeof(Capability) == sizeof(int32_t),
             "Capability size has changed");
+#ifdef BYPASS_IHWC
     uint32_t numCapabilities = 0;
     mHwcDevice->getCapabilities(mHwcDevice, &numCapabilities, nullptr);
     std::vector<Capability> capabilities(numCapabilities);
@@ -323,6 +352,12 @@
     for (auto capability : capabilities) {
         mCapabilities.emplace(capability);
     }
+#else
+    auto capabilities = mComposer->getCapabilities();
+    for (auto capability : capabilities) {
+        mCapabilities.emplace(static_cast<Capability>(capability));
+    }
+#endif
 }
 
 bool Device::hasCapability(HWC2::Capability capability) const
@@ -333,6 +368,7 @@
 
 void Device::loadFunctionPointers()
 {
+#ifdef BYPASS_IHWC
     // For all of these early returns, we log an error message inside
     // loadFunctionPointer specifying which function failed to load
 
@@ -426,13 +462,48 @@
             mSetLayerVisibleRegion)) return;
     if (!loadFunctionPointer(FunctionDescriptor::SetLayerZOrder,
             mSetLayerZOrder)) return;
+#endif // BYPASS_IHWC
 }
 
+namespace {
+class ComposerCallback : public Hwc2::IComposerCallback {
+public:
+    ComposerCallback(Device* device) : mDevice(device) {}
+
+    Return<void> onHotplug(Hwc2::Display display,
+            Connection connected) override
+    {
+        hotplug_hook(mDevice, display, static_cast<int32_t>(connected));
+        return Void();
+    }
+
+    Return<void> onRefresh(Hwc2::Display display) override
+    {
+        refresh_hook(mDevice, display);
+        return Void();
+    }
+
+    Return<void> onVsync(Hwc2::Display display, int64_t timestamp) override
+    {
+        vsync_hook(mDevice, display, timestamp);
+        return Void();
+    }
+
+private:
+    Device* mDevice;
+};
+} // namespace anonymous
+
 void Device::registerCallbacks()
 {
+#ifdef BYPASS_IHWC
     registerCallback<HWC2_PFN_HOTPLUG>(Callback::Hotplug, hotplug_hook);
     registerCallback<HWC2_PFN_REFRESH>(Callback::Refresh, refresh_hook);
     registerCallback<HWC2_PFN_VSYNC>(Callback::Vsync, vsync_hook);
+#else
+    sp<ComposerCallback> callback = new ComposerCallback(this);
+    mComposer->registerCallback(callback);
+#endif
 }
 
 
@@ -441,7 +512,11 @@
 void Device::destroyVirtualDisplay(hwc2_display_t display)
 {
     ALOGI("Destroying virtual display");
+#ifdef BYPASS_IHWC
     int32_t intError = mDestroyVirtualDisplay(mHwcDevice, display);
+#else
+    auto intError = mComposer->destroyVirtualDisplay(display);
+#endif
     auto error = static_cast<Error>(intError);
     ALOGE_IF(error != Error::None, "destroyVirtualDisplay(%" PRIu64 ") failed:"
             " %s (%d)", display, to_string(error).c_str(), intError);
@@ -498,14 +573,22 @@
 
 Error Display::acceptChanges()
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mAcceptDisplayChanges(mDevice.mHwcDevice, mId);
+#else
+    auto intError = mDevice.mComposer->acceptDisplayChanges(mId);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Display::createLayer(std::shared_ptr<Layer>* outLayer)
 {
     hwc2_layer_t layerId = 0;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mCreateLayer(mDevice.mHwcDevice, mId, &layerId);
+#else
+    auto intError = mDevice.mComposer->createLayer(mId, layerId);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -522,8 +605,12 @@
 {
     ALOGV("[%" PRIu64 "] getActiveConfig", mId);
     hwc2_config_t configId = 0;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mGetActiveConfig(mDevice.mHwcDevice, mId,
             &configId);
+#else
+    auto intError = mDevice.mComposer->getActiveConfig(mId, configId);
+#endif
     auto error = static_cast<Error>(intError);
 
     if (error != Error::None) {
@@ -546,6 +633,7 @@
 Error Display::getChangedCompositionTypes(
         std::unordered_map<std::shared_ptr<Layer>, Composition>* outTypes)
 {
+#ifdef BYPASS_IHWC
     uint32_t numElements = 0;
     int32_t intError = mDevice.mGetChangedCompositionTypes(mDevice.mHwcDevice,
             mId, &numElements, nullptr, nullptr);
@@ -558,6 +646,14 @@
     std::vector<int32_t> types(numElements);
     intError = mDevice.mGetChangedCompositionTypes(mDevice.mHwcDevice, mId,
             &numElements, layerIds.data(), types.data());
+#else
+    std::vector<Hwc2::Layer> layerIds;
+    std::vector<Hwc2::IComposer::Composition> types;
+    auto intError = mDevice.mComposer->getChangedCompositionTypes(mId,
+            layerIds, types);
+    uint32_t numElements = layerIds.size();
+    auto error = static_cast<Error>(intError);
+#endif
     error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -583,6 +679,7 @@
 
 Error Display::getColorModes(std::vector<android_color_mode_t>* outModes) const
 {
+#ifdef BYPASS_IHWC
     uint32_t numModes = 0;
     int32_t intError = mDevice.mGetColorModes(mDevice.mHwcDevice, mId,
             &numModes, nullptr);
@@ -595,6 +692,12 @@
     intError = mDevice.mGetColorModes(mDevice.mHwcDevice, mId, &numModes,
             modes.data());
     error = static_cast<Error>(intError);
+#else
+    std::vector<Hwc2::ColorMode> modes;
+    auto intError = mDevice.mComposer->getColorModes(mId, modes);
+    uint32_t numModes = modes.size();
+    auto error = static_cast<Error>(intError);
+#endif
     if (error != Error::None) {
         return error;
     }
@@ -617,6 +720,7 @@
 
 Error Display::getName(std::string* outName) const
 {
+#ifdef BYPASS_IHWC
     uint32_t size;
     int32_t intError = mDevice.mGetDisplayName(mDevice.mHwcDevice, mId, &size,
             nullptr);
@@ -635,12 +739,17 @@
 
     *outName = std::string(rawName.cbegin(), rawName.cend());
     return Error::None;
+#else
+    auto intError = mDevice.mComposer->getDisplayName(mId, *outName);
+    return static_cast<Error>(intError);
+#endif
 }
 
 Error Display::getRequests(HWC2::DisplayRequest* outDisplayRequests,
         std::unordered_map<std::shared_ptr<Layer>, LayerRequest>*
                 outLayerRequests)
 {
+#ifdef BYPASS_IHWC
     int32_t intDisplayRequests = 0;
     uint32_t numElements = 0;
     int32_t intError = mDevice.mGetDisplayRequests(mDevice.mHwcDevice, mId,
@@ -656,6 +765,15 @@
             &intDisplayRequests, &numElements, layerIds.data(),
             layerRequests.data());
     error = static_cast<Error>(intError);
+#else
+    uint32_t intDisplayRequests;
+    std::vector<Hwc2::Layer> layerIds;
+    std::vector<uint32_t> layerRequests;
+    auto intError = mDevice.mComposer->getDisplayRequests(mId,
+            intDisplayRequests, layerIds, layerRequests);
+    uint32_t numElements = layerIds.size();
+    auto error = static_cast<Error>(intError);
+#endif
     if (error != Error::None) {
         return error;
     }
@@ -680,9 +798,15 @@
 
 Error Display::getType(DisplayType* outType) const
 {
+#ifdef BYPASS_IHWC
     int32_t intType = 0;
     int32_t intError = mDevice.mGetDisplayType(mDevice.mHwcDevice, mId,
             &intType);
+#else
+    Hwc2::IComposer::DisplayType intType =
+        Hwc2::IComposer::DisplayType::INVALID;
+    auto intError = mDevice.mComposer->getDisplayType(mId, intType);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -694,9 +818,14 @@
 
 Error Display::supportsDoze(bool* outSupport) const
 {
+#ifdef BYPASS_IHWC
     int32_t intSupport = 0;
     int32_t intError = mDevice.mGetDozeSupport(mDevice.mHwcDevice, mId,
             &intSupport);
+#else
+    bool intSupport = false;
+    auto intError = mDevice.mComposer->getDozeSupport(mId, intSupport);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -712,6 +841,7 @@
     float maxLuminance = -1.0f;
     float maxAverageLuminance = -1.0f;
     float minLuminance = -1.0f;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mGetHdrCapabilities(mDevice.mHwcDevice, mId,
             &numTypes, nullptr, &maxLuminance, &maxAverageLuminance,
             &minLuminance);
@@ -724,6 +854,18 @@
     intError = mDevice.mGetHdrCapabilities(mDevice.mHwcDevice, mId, &numTypes,
             types.data(), &maxLuminance, &maxAverageLuminance, &minLuminance);
     error = static_cast<HWC2::Error>(intError);
+#else
+    std::vector<Hwc2::Hdr> intTypes;
+    auto intError = mDevice.mComposer->getHdrCapabilities(mId, intTypes,
+            maxLuminance, maxAverageLuminance, minLuminance);
+    auto error = static_cast<HWC2::Error>(intError);
+
+    std::vector<int32_t> types;
+    for (auto type : intTypes) {
+        types.push_back(static_cast<int32_t>(type));
+    }
+    numTypes = types.size();
+#endif
     if (error != Error::None) {
         return error;
     }
@@ -736,6 +878,7 @@
 Error Display::getReleaseFences(
         std::unordered_map<std::shared_ptr<Layer>, sp<Fence>>* outFences) const
 {
+#ifdef BYPASS_IHWC
     uint32_t numElements = 0;
     int32_t intError = mDevice.mGetReleaseFences(mDevice.mHwcDevice, mId,
             &numElements, nullptr, nullptr);
@@ -749,6 +892,14 @@
     intError = mDevice.mGetReleaseFences(mDevice.mHwcDevice, mId, &numElements,
             layerIds.data(), fenceFds.data());
     error = static_cast<Error>(intError);
+#else
+    std::vector<Hwc2::Layer> layerIds;
+    std::vector<int> fenceFds;
+    auto intError = mDevice.mComposer->getReleaseFences(mId,
+            layerIds, fenceFds);
+    auto error = static_cast<Error>(intError);
+    uint32_t numElements = layerIds.size();
+#endif
     if (error != Error::None) {
         return error;
     }
@@ -774,8 +925,12 @@
 Error Display::present(sp<Fence>* outRetireFence)
 {
     int32_t retireFenceFd = 0;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mPresentDisplay(mDevice.mHwcDevice, mId,
             &retireFenceFd);
+#else
+    auto intError = mDevice.mComposer->presentDisplay(mId, retireFenceFd);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         return error;
@@ -793,8 +948,12 @@
                 config->getDisplayId(), mId);
         return Error::BadConfig;
     }
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetActiveConfig(mDevice.mHwcDevice, mId,
             config->getId());
+#else
+    auto intError = mDevice.mComposer->setActiveConfig(mId, config->getId());
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -803,22 +962,38 @@
 {
     // TODO: Properly encode client target surface damage
     int32_t fenceFd = acquireFence->dup();
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetClientTarget(mDevice.mHwcDevice, mId, target,
             fenceFd, static_cast<int32_t>(dataspace), {0, nullptr});
+#else
+    auto intError = mDevice.mComposer->setClientTarget(mId, target, fenceFd,
+            static_cast<Hwc2::Dataspace>(dataspace),
+            std::vector<Hwc2::IComposer::Rect>());
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Display::setColorMode(android_color_mode_t mode)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetColorMode(mDevice.mHwcDevice, mId, mode);
+#else
+    auto intError = mDevice.mComposer->setColorMode(mId,
+            static_cast<Hwc2::ColorMode>(mode));
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Display::setColorTransform(const android::mat4& matrix,
         android_color_transform_t hint)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetColorTransform(mDevice.mHwcDevice, mId,
             matrix.asArray(), static_cast<int32_t>(hint));
+#else
+    auto intError = mDevice.mComposer->setColorTransform(mId,
+            matrix.asArray(), static_cast<Hwc2::ColorTransform>(hint));
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -827,24 +1002,38 @@
 {
     int32_t fenceFd = releaseFence->dup();
     auto handle = buffer->getNativeBuffer()->handle;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetOutputBuffer(mDevice.mHwcDevice, mId, handle,
             fenceFd);
+#else
+    auto intError = mDevice.mComposer->setOutputBuffer(mId, handle, fenceFd);
+#endif
     close(fenceFd);
     return static_cast<Error>(intError);
 }
 
 Error Display::setPowerMode(PowerMode mode)
 {
+#ifdef BYPASS_IHWC
     auto intMode = static_cast<int32_t>(mode);
     int32_t intError = mDevice.mSetPowerMode(mDevice.mHwcDevice, mId, intMode);
+#else
+    auto intMode = static_cast<Hwc2::IComposer::PowerMode>(mode);
+    auto intError = mDevice.mComposer->setPowerMode(mId, intMode);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Display::setVsyncEnabled(Vsync enabled)
 {
+#ifdef BYPASS_IHWC
     auto intEnabled = static_cast<int32_t>(enabled);
     int32_t intError = mDevice.mSetVsyncEnabled(mDevice.mHwcDevice, mId,
             intEnabled);
+#else
+    auto intEnabled = static_cast<Hwc2::IComposer::Vsync>(enabled);
+    auto intError = mDevice.mComposer->setVsyncEnabled(mId, intEnabled);
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -852,8 +1041,13 @@
 {
     uint32_t numTypes = 0;
     uint32_t numRequests = 0;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mValidateDisplay(mDevice.mHwcDevice, mId,
             &numTypes, &numRequests);
+#else
+    auto intError = mDevice.mComposer->validateDisplay(mId,
+            numTypes, numRequests);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None && error != Error::HasChanges) {
         return error;
@@ -869,8 +1063,14 @@
 int32_t Display::getAttribute(hwc2_config_t configId, Attribute attribute)
 {
     int32_t value = 0;
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mGetDisplayAttribute(mDevice.mHwcDevice, mId,
             configId, static_cast<int32_t>(attribute), &value);
+#else
+    auto intError = mDevice.mComposer->getDisplayAttribute(mId,
+            configId, static_cast<Hwc2::IComposer::Attribute>(attribute),
+            value);
+#endif
     auto error = static_cast<Error>(intError);
     if (error != Error::None) {
         ALOGE("getDisplayAttribute(%" PRIu64 ", %u, %s) failed: %s (%d)", mId,
@@ -899,6 +1099,7 @@
 {
     ALOGV("[%" PRIu64 "] loadConfigs", mId);
 
+#ifdef BYPASS_IHWC
     uint32_t numConfigs = 0;
     int32_t intError = mDevice.mGetDisplayConfigs(mDevice.mHwcDevice, mId,
             &numConfigs, nullptr);
@@ -913,6 +1114,11 @@
     intError = mDevice.mGetDisplayConfigs(mDevice.mHwcDevice, mId, &numConfigs,
             configIds.data());
     error = static_cast<Error>(intError);
+#else
+    std::vector<Hwc2::Config> configIds;
+    auto intError = mDevice.mComposer->getDisplayConfigs(mId, configIds);
+    auto error = static_cast<Error>(intError);
+#endif
     if (error != Error::None) {
         ALOGE("[%" PRIu64 "] getDisplayConfigs [2] failed: %s (%d)", mId,
                 to_string(error).c_str(), intError);
@@ -928,7 +1134,11 @@
 
 void Display::destroyLayer(hwc2_layer_t layerId)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mDestroyLayer(mDevice.mHwcDevice, mId, layerId);
+#else
+    auto intError =mDevice.mComposer->destroyLayer(mId, layerId);
+#endif
     auto error = static_cast<Error>(intError);
     ALOGE_IF(error != Error::None, "destroyLayer(%" PRIu64 ", %" PRIu64 ")"
             " failed: %s (%d)", mId, layerId, to_string(error).c_str(),
@@ -970,8 +1180,13 @@
 
 Error Layer::setCursorPosition(int32_t x, int32_t y)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetCursorPosition(mDevice.mHwcDevice,
             mDisplayId, mId, x, y);
+#else
+    auto intError = mDevice.mComposer->setCursorPosition(mDisplayId,
+            mId, x, y);
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -979,8 +1194,13 @@
         const sp<Fence>& acquireFence)
 {
     int32_t fenceFd = acquireFence->dup();
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetLayerBuffer(mDevice.mHwcDevice, mDisplayId,
             mId, buffer, fenceFd);
+#else
+    auto intError = mDevice.mComposer->setLayerBuffer(mDisplayId,
+            mId, buffer, fenceFd);
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -988,26 +1208,44 @@
 {
     // We encode default full-screen damage as INVALID_RECT upstream, but as 0
     // rects for HWC
+#ifdef BYPASS_IHWC
     int32_t intError = 0;
+#else
+    Hwc2::Error intError = Hwc2::Error::NONE;
+#endif
     if (damage.isRect() && damage.getBounds() == Rect::INVALID_RECT) {
+#ifdef BYPASS_IHWC
         intError = mDevice.mSetLayerSurfaceDamage(mDevice.mHwcDevice,
                 mDisplayId, mId, {0, nullptr});
+#else
+        intError = mDevice.mComposer->setLayerSurfaceDamage(mDisplayId,
+                mId, std::vector<Hwc2::IComposer::Rect>());
+#endif
     } else {
         size_t rectCount = 0;
         auto rectArray = damage.getArray(&rectCount);
 
+#ifdef BYPASS_IHWC
         std::vector<hwc_rect_t> hwcRects;
+#else
+        std::vector<Hwc2::IComposer::Rect> hwcRects;
+#endif
         for (size_t rect = 0; rect < rectCount; ++rect) {
             hwcRects.push_back({rectArray[rect].left, rectArray[rect].top,
                     rectArray[rect].right, rectArray[rect].bottom});
         }
 
+#ifdef BYPASS_IHWC
         hwc_region_t hwcRegion = {};
         hwcRegion.numRects = rectCount;
         hwcRegion.rects = hwcRects.data();
 
         intError = mDevice.mSetLayerSurfaceDamage(mDevice.mHwcDevice,
                 mDisplayId, mId, hwcRegion);
+#else
+        intError = mDevice.mComposer->setLayerSurfaceDamage(mDisplayId,
+                mId, hwcRects);
+#endif
     }
 
     return static_cast<Error>(intError);
@@ -1015,47 +1253,83 @@
 
 Error Layer::setBlendMode(BlendMode mode)
 {
+#ifdef BYPASS_IHWC
     auto intMode = static_cast<int32_t>(mode);
     int32_t intError = mDevice.mSetLayerBlendMode(mDevice.mHwcDevice,
             mDisplayId, mId, intMode);
+#else
+    auto intMode = static_cast<Hwc2::IComposer::BlendMode>(mode);
+    auto intError = mDevice.mComposer->setLayerBlendMode(mDisplayId,
+            mId, intMode);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setColor(hwc_color_t color)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetLayerColor(mDevice.mHwcDevice, mDisplayId,
             mId, color);
+#else
+    Hwc2::IComposer::Color hwcColor{color.r, color.g, color.b, color.a};
+    auto intError = mDevice.mComposer->setLayerColor(mDisplayId,
+            mId, hwcColor);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setCompositionType(Composition type)
 {
+#ifdef BYPASS_IHWC
     auto intType = static_cast<int32_t>(type);
     int32_t intError = mDevice.mSetLayerCompositionType(mDevice.mHwcDevice,
             mDisplayId, mId, intType);
+#else
+    auto intType = static_cast<Hwc2::IComposer::Composition>(type);
+    auto intError = mDevice.mComposer->setLayerCompositionType(mDisplayId,
+            mId, intType);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setDataspace(android_dataspace_t dataspace)
 {
+#ifdef BYPASS_IHWC
     auto intDataspace = static_cast<int32_t>(dataspace);
     int32_t intError = mDevice.mSetLayerDataspace(mDevice.mHwcDevice,
             mDisplayId, mId, intDataspace);
+#else
+    auto intDataspace = static_cast<Hwc2::Dataspace>(dataspace);
+    auto intError = mDevice.mComposer->setLayerDataspace(mDisplayId,
+            mId, intDataspace);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setDisplayFrame(const Rect& frame)
 {
+#ifdef BYPASS_IHWC
     hwc_rect_t hwcRect{frame.left, frame.top, frame.right, frame.bottom};
     int32_t intError = mDevice.mSetLayerDisplayFrame(mDevice.mHwcDevice,
             mDisplayId, mId, hwcRect);
+#else
+    Hwc2::IComposer::Rect hwcRect{frame.left, frame.top,
+        frame.right, frame.bottom};
+    auto intError = mDevice.mComposer->setLayerDisplayFrame(mDisplayId,
+            mId, hwcRect);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setPlaneAlpha(float alpha)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetLayerPlaneAlpha(mDevice.mHwcDevice,
             mDisplayId, mId, alpha);
+#else
+    auto intError = mDevice.mComposer->setLayerPlaneAlpha(mDisplayId,
+            mId, alpha);
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -1066,24 +1340,42 @@
                 "device supports sideband streams");
         return Error::Unsupported;
     }
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetLayerSidebandStream(mDevice.mHwcDevice,
             mDisplayId, mId, stream);
+#else
+    auto intError = mDevice.mComposer->setLayerSidebandStream(mDisplayId,
+            mId, stream);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setSourceCrop(const FloatRect& crop)
 {
+#ifdef BYPASS_IHWC
     hwc_frect_t hwcRect{crop.left, crop.top, crop.right, crop.bottom};
     int32_t intError = mDevice.mSetLayerSourceCrop(mDevice.mHwcDevice,
             mDisplayId, mId, hwcRect);
+#else
+    Hwc2::IComposer::FRect hwcRect{
+        crop.left, crop.top, crop.right, crop.bottom};
+    auto intError = mDevice.mComposer->setLayerSourceCrop(mDisplayId,
+            mId, hwcRect);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setTransform(Transform transform)
 {
+#ifdef BYPASS_IHWC
     auto intTransform = static_cast<int32_t>(transform);
     int32_t intError = mDevice.mSetLayerTransform(mDevice.mHwcDevice,
             mDisplayId, mId, intTransform);
+#else
+    auto intTransform = static_cast<Hwc2::Transform>(transform);
+    auto intError = mDevice.mComposer->setLayerTransform(mDisplayId,
+            mId, intTransform);
+#endif
     return static_cast<Error>(intError);
 }
 
@@ -1092,25 +1384,38 @@
     size_t rectCount = 0;
     auto rectArray = region.getArray(&rectCount);
 
+#ifdef BYPASS_IHWC
     std::vector<hwc_rect_t> hwcRects;
+#else
+    std::vector<Hwc2::IComposer::Rect> hwcRects;
+#endif
     for (size_t rect = 0; rect < rectCount; ++rect) {
         hwcRects.push_back({rectArray[rect].left, rectArray[rect].top,
                 rectArray[rect].right, rectArray[rect].bottom});
     }
 
+#ifdef BYPASS_IHWC
     hwc_region_t hwcRegion = {};
     hwcRegion.numRects = rectCount;
     hwcRegion.rects = hwcRects.data();
 
     int32_t intError = mDevice.mSetLayerVisibleRegion(mDevice.mHwcDevice,
             mDisplayId, mId, hwcRegion);
+#else
+    auto intError = mDevice.mComposer->setLayerVisibleRegion(mDisplayId,
+            mId, hwcRects);
+#endif
     return static_cast<Error>(intError);
 }
 
 Error Layer::setZOrder(uint32_t z)
 {
+#ifdef BYPASS_IHWC
     int32_t intError = mDevice.mSetLayerZOrder(mDevice.mHwcDevice, mDisplayId,
             mId, z);
+#else
+    auto intError = mDevice.mComposer->setLayerZOrder(mDisplayId, mId, z);
+#endif
     return static_cast<Error>(intError);
 }
 
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.h b/services/surfaceflinger/DisplayHardware/HWC2.h
index 32a9de0..1145ba1 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.h
+++ b/services/surfaceflinger/DisplayHardware/HWC2.h
@@ -17,6 +17,10 @@
 #ifndef ANDROID_SF_HWC2_H
 #define ANDROID_SF_HWC2_H
 
+#ifndef USE_HWC2
+#define BYPASS_IHWC
+#endif
+
 #define HWC2_INCLUDE_STRINGIFICATION
 #define HWC2_USE_CPP11
 #include <hardware/hwcomposer2.h>
@@ -42,6 +46,9 @@
     class GraphicBuffer;
     class Rect;
     class Region;
+    namespace Hwc2 {
+        class Composer;
+    };
 }
 
 namespace HWC2 {
@@ -57,7 +64,11 @@
 class Device
 {
 public:
+#ifdef BYPASS_IHWC
     explicit Device(hwc2_device_t* device);
+#else
+    Device();
+#endif
     ~Device();
 
     friend class HWC2::Display;
@@ -98,6 +109,7 @@
 private:
     // Initialization methods
 
+#ifdef BYPASS_IHWC
     template <typename PFN>
     [[clang::warn_unused_result]] bool loadFunctionPointer(
             FunctionDescriptor desc, PFN& outPFN) {
@@ -121,6 +133,7 @@
         auto pfn = reinterpret_cast<hwc2_function_pointer_t>(hook);
         mRegisterCallback(mHwcDevice, intCallback, callbackData, pfn);
     }
+#endif
 
     void loadCapabilities();
     void loadFunctionPointers();
@@ -132,6 +145,7 @@
 
     // Member variables
 
+#ifdef BYPASS_IHWC
     hwc2_device_t* mHwcDevice;
 
     // Device function pointers
@@ -181,6 +195,9 @@
     HWC2_PFN_SET_LAYER_TRANSFORM mSetLayerTransform;
     HWC2_PFN_SET_LAYER_VISIBLE_REGION mSetLayerVisibleRegion;
     HWC2_PFN_SET_LAYER_Z_ORDER mSetLayerZOrder;
+#else
+    std::unique_ptr<android::Hwc2::Composer> mComposer;
+#endif // BYPASS_IHWC
 
     std::unordered_set<Capability> mCapabilities;
     std::unordered_map<hwc2_display_t, std::weak_ptr<Display>> mDisplays;
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index c87ba72..bb2e45a 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -109,6 +109,7 @@
 {
     ALOGV("loadHwcModule");
 
+#ifdef BYPASS_IHWC
     hw_module_t const* module;
 
     if (hw_get_module(HWC_HARDWARE_MODULE_ID, &module) != 0) {
@@ -140,6 +141,9 @@
         mHwcDevice = std::make_unique<HWC2::Device>(
                 static_cast<hwc2_device_t*>(mAdapter.get()));
     }
+#else
+    mHwcDevice = std::make_unique<HWC2::Device>();
+#endif
 
     mRemainingHwcVirtualDisplays = mHwcDevice->getMaxVirtualDisplayCount();
 }