diff --git a/Android.mk b/Android.mk
index 7bbe332..44ab1bb 100644
--- a/Android.mk
+++ b/Android.mk
@@ -75,11 +75,12 @@
 	drmdisplaycompositor.cpp \
 	drmencoder.cpp \
 	drmeventlistener.cpp \
+	drmhwctwo.cpp \
 	drmmode.cpp \
 	drmplane.cpp \
 	drmproperty.cpp \
 	glworker.cpp \
-	hwcomposer.cpp \
+	hwcutils.cpp \
 	platform.cpp \
 	separate_rects.cpp \
 	virtualcompositorworker.cpp \
@@ -87,6 +88,10 @@
 
 LOCAL_CFLAGS := $(common_drm_hwcomposer_cflags)
 
+LOCAL_CPPFLAGS += \
+	-DHWC2_USE_CPP11 \
+	-DHWC2_INCLUDE_STRINGIFICATION
+
 ifeq ($(strip $(BOARD_DRM_HWCOMPOSER_BUFFER_IMPORTER)),nvidia-gralloc)
 LOCAL_CPPFLAGS += -DUSE_NVIDIA_IMPORTER
 LOCAL_SRC_FILES += platformnv.cpp
diff --git a/drmdisplaycomposition.cpp b/drmdisplaycomposition.cpp
index b7f8d1a..0f8084b 100644
--- a/drmdisplaycomposition.cpp
+++ b/drmdisplaycomposition.cpp
@@ -258,8 +258,10 @@
     if (!layer->release_fence)
       continue;
     int ret = layer->release_fence.Set(CreateNextTimelineFence());
-    if (ret < 0)
+    if (ret < 0) {
+      ALOGE("Failed to set the release fence (squash) %d", ret);
       return ret;
+    }
   }
   timeline_squash_done_ = timeline_;
 
@@ -276,8 +278,10 @@
     if (!layer->release_fence)
       continue;
     int ret = layer->release_fence.Set(CreateNextTimelineFence());
-    if (ret < 0)
+    if (ret < 0) {
+      ALOGE("Failed to set the release fence (comp) %d", ret);
       return ret;
+    }
   }
 
   return 0;
diff --git a/drmdisplaycompositor.cpp b/drmdisplaycompositor.cpp
index 14b87aa..b3cfb6d 100644
--- a/drmdisplaycompositor.cpp
+++ b/drmdisplaycompositor.cpp
@@ -375,7 +375,8 @@
 
   std::vector<DrmCompositionRegion> &regions = display_comp->squash_regions();
   ret = pre_compositor_->Composite(display_comp->layers().data(),
-                                   regions.data(), regions.size(), fb.buffer());
+                                   regions.data(), regions.size(), fb.buffer(),
+                                   display_comp->importer());
   pre_compositor_->Finish();
 
   if (ret) {
@@ -408,7 +409,8 @@
 
   std::vector<DrmCompositionRegion> &regions = display_comp->pre_comp_regions();
   ret = pre_compositor_->Composite(display_comp->layers().data(),
-                                   regions.data(), regions.size(), fb.buffer());
+                                   regions.data(), regions.size(), fb.buffer(),
+                                   display_comp->importer());
   pre_compositor_->Finish();
 
   if (ret) {
@@ -626,6 +628,8 @@
           if (ret)
             ALOGW("Acquire fence %d wait %d failed (%d). Total time %d",
                   acquire_fence, i, ret, total_fence_timeout);
+          else
+            break;
         }
         if (ret) {
           ALOGE("Failed to wait for acquire %d/%d", acquire_fence, ret);
diff --git a/drmeventlistener.cpp b/drmeventlistener.cpp
index a07bd89..7a21980 100644
--- a/drmeventlistener.cpp
+++ b/drmeventlistener.cpp
@@ -126,7 +126,7 @@
 
   if (FD_ISSET(drm_->fd(), &fds_)) {
     drmEventContext event_context = {
-        .version = DRM_EVENT_CONTEXT_VERSION,
+        .version = 2,
         .vblank_handler = NULL,
         .page_flip_handler = DrmEventListener::FlipHandler};
     drmHandleEvent(drm_->fd(), &event_context);
diff --git a/drmhwcomposer.h b/drmhwcomposer.h
index d087873..f8440fb 100644
--- a/drmhwcomposer.h
+++ b/drmhwcomposer.h
@@ -144,13 +144,17 @@
   uint8_t alpha = 0xff;
   DrmHwcRect<float> source_crop;
   DrmHwcRect<int> display_frame;
-  std::vector<DrmHwcRect<int>> source_damage;
 
   UniqueFd acquire_fence;
   OutputFd release_fence;
 
   int InitFromHwcLayer(hwc_layer_1_t *sf_layer, Importer *importer,
                        const gralloc_module_t *gralloc);
+  int ImportBuffer(Importer *importer, const gralloc_module_t *gralloc);
+
+  void SetTransform(int32_t sf_transform);
+  void SetSourceCrop(hwc_frect_t const &crop);
+  void SetDisplayFrame(hwc_rect_t const &frame);
 
   buffer_handle_t get_usable_handle() const {
     return handle.get() != NULL ? handle.get() : sf_handle;
diff --git a/drmhwctwo.cpp b/drmhwctwo.cpp
new file mode 100644
index 0000000..8c853f4
--- /dev/null
+++ b/drmhwctwo.cpp
@@ -0,0 +1,1088 @@
+/*
+ * 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.
+ */
+
+#define ATRACE_TAG ATRACE_TAG_GRAPHICS
+#define LOG_TAG "hwc-drm-two"
+
+#include "drmdisplaycomposition.h"
+#include "drmhwcomposer.h"
+#include "drmhwctwo.h"
+#include "platform.h"
+#include "vsyncworker.h"
+
+#include <inttypes.h>
+#include <string>
+
+#include <cutils/log.h>
+#include <cutils/properties.h>
+#include <hardware/hardware.h>
+#include <hardware/hwcomposer2.h>
+
+namespace android {
+
+class DrmVsyncCallback : public VsyncCallback {
+ public:
+  DrmVsyncCallback(hwc2_callback_data_t data, hwc2_function_pointer_t hook)
+      : data_(data), hook_(hook) {
+  }
+
+  void Callback(int display, int64_t timestamp) {
+    auto hook = reinterpret_cast<HWC2_PFN_VSYNC>(hook_);
+    hook(data_, display, timestamp);
+  }
+
+ private:
+  hwc2_callback_data_t data_;
+  hwc2_function_pointer_t hook_;
+};
+
+DrmHwcTwo::DrmHwcTwo() {
+  common.tag = HARDWARE_DEVICE_TAG;
+  common.version = HWC_DEVICE_API_VERSION_2_0;
+  common.close = HookDevClose;
+  getCapabilities = HookDevGetCapabilities;
+  getFunction = HookDevGetFunction;
+}
+
+HWC2::Error DrmHwcTwo::Init() {
+  int ret = drm_.Init();
+  if (ret) {
+    ALOGE("Can't initialize drm object %d", ret);
+    return HWC2::Error::NoResources;
+  }
+
+  importer_.reset(Importer::CreateInstance(&drm_));
+  if (!importer_) {
+    ALOGE("Failed to create importer instance");
+    return HWC2::Error::NoResources;
+  }
+
+  ret = hw_get_module(GRALLOC_HARDWARE_MODULE_ID,
+                      (const hw_module_t **)&gralloc_);
+  if (ret) {
+    ALOGE("Failed to open gralloc module %d", ret);
+    return HWC2::Error::NoResources;
+  }
+
+  displays_.emplace(std::piecewise_construct,
+                    std::forward_as_tuple(HWC_DISPLAY_PRIMARY),
+                    std::forward_as_tuple(&drm_, importer_, gralloc_,
+                                          HWC_DISPLAY_PRIMARY,
+                                          HWC2::DisplayType::Physical));
+
+  DrmCrtc *crtc = drm_.GetCrtcForDisplay(static_cast<int>(HWC_DISPLAY_PRIMARY));
+  if (!crtc) {
+    ALOGE("Failed to get crtc for display %d",
+          static_cast<int>(HWC_DISPLAY_PRIMARY));
+    return HWC2::Error::BadDisplay;
+  }
+
+  std::vector<DrmPlane *> display_planes;
+  for (auto &plane : drm_.planes()) {
+    if (plane->GetCrtcSupported(*crtc))
+      display_planes.push_back(plane.get());
+  }
+  displays_.at(HWC_DISPLAY_PRIMARY).Init(&display_planes);
+  return HWC2::Error::None;
+}
+
+template <typename... Args>
+static inline HWC2::Error unsupported(char const *func, Args... /*args*/) {
+  ALOGV("Unsupported function: %s", func);
+  return HWC2::Error::Unsupported;
+}
+
+static inline void supported(char const *func) {
+  ALOGV("Supported function: %s", func);
+}
+
+HWC2::Error DrmHwcTwo::CreateVirtualDisplay(uint32_t width, uint32_t height,
+                                            int32_t *format,
+                                            hwc2_display_t *display) {
+  // TODO: Implement virtual display
+  return unsupported(__func__, width, height, format, display);
+}
+
+HWC2::Error DrmHwcTwo::DestroyVirtualDisplay(hwc2_display_t display) {
+  // TODO: Implement virtual display
+  return unsupported(__func__, display);
+}
+
+void DrmHwcTwo::Dump(uint32_t *size, char *buffer) {
+  // TODO: Implement dump
+  unsupported(__func__, size, buffer);
+}
+
+uint32_t DrmHwcTwo::GetMaxVirtualDisplayCount() {
+  // TODO: Implement virtual display
+  unsupported(__func__);
+  return 0;
+}
+
+HWC2::Error DrmHwcTwo::RegisterCallback(int32_t descriptor,
+                                        hwc2_callback_data_t data,
+                                        hwc2_function_pointer_t function) {
+  supported(__func__);
+  auto callback = static_cast<HWC2::Callback>(descriptor);
+  callbacks_.emplace(callback, HwcCallback(data, function));
+
+  switch (callback) {
+    case HWC2::Callback::Hotplug: {
+      auto hotplug = reinterpret_cast<HWC2_PFN_HOTPLUG>(function);
+      hotplug(data, HWC_DISPLAY_PRIMARY,
+              static_cast<int32_t>(HWC2::Connection::Connected));
+      break;
+    }
+    case HWC2::Callback::Vsync: {
+      for (std::pair<const hwc2_display_t, DrmHwcTwo::HwcDisplay> &d :
+           displays_)
+        d.second.RegisterVsyncCallback(data, function);
+      break;
+    }
+    default:
+      break;
+  }
+  return HWC2::Error::None;
+}
+
+DrmHwcTwo::HwcDisplay::HwcDisplay(DrmResources *drm,
+                                  std::shared_ptr<Importer> importer,
+                                  const gralloc_module_t *gralloc,
+                                  hwc2_display_t handle, HWC2::DisplayType type)
+    : drm_(drm),
+      importer_(importer),
+      gralloc_(gralloc),
+      handle_(handle),
+      type_(type) {
+  supported(__func__);
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::Init(std::vector<DrmPlane *> *planes) {
+  supported(__func__);
+  planner_ = Planner::CreateInstance(drm_);
+  if (!planner_) {
+    ALOGE("Failed to create planner instance for composition");
+    return HWC2::Error::NoResources;
+  }
+
+  int display = static_cast<int>(handle_);
+  int ret = compositor_.Init(drm_, display);
+  if (ret) {
+    ALOGE("Failed display compositor init for display %d (%d)", display, ret);
+    return HWC2::Error::NoResources;
+  }
+
+  // Split up the given display planes into primary and overlay to properly
+  // interface with the composition
+  char use_overlay_planes_prop[PROPERTY_VALUE_MAX];
+  property_get("hwc.drm.use_overlay_planes", use_overlay_planes_prop, "1");
+  bool use_overlay_planes = atoi(use_overlay_planes_prop);
+  for (auto &plane : *planes) {
+    if (plane->type() == DRM_PLANE_TYPE_PRIMARY)
+      primary_planes_.push_back(plane);
+    else if (use_overlay_planes && (plane)->type() == DRM_PLANE_TYPE_OVERLAY)
+      overlay_planes_.push_back(plane);
+  }
+
+  crtc_ = drm_->GetCrtcForDisplay(display);
+  if (!crtc_) {
+    ALOGE("Failed to get crtc for display %d", display);
+    return HWC2::Error::BadDisplay;
+  }
+
+  connector_ = drm_->GetConnectorForDisplay(display);
+  if (!connector_) {
+    ALOGE("Failed to get connector for display %d", display);
+    return HWC2::Error::BadDisplay;
+  }
+
+  // Fetch the number of modes from the display
+  uint32_t num_configs;
+  HWC2::Error err = GetDisplayConfigs(&num_configs, NULL);
+  if (err != HWC2::Error::None || !num_configs)
+    return err;
+
+  // Grab the first mode, we'll choose this as the active mode
+  // TODO: Should choose the preferred mode here
+  hwc2_config_t default_config;
+  num_configs = 1;
+  err = GetDisplayConfigs(&num_configs, &default_config);
+  if (err != HWC2::Error::None)
+    return err;
+
+  ret = vsync_worker_.Init(drm_, display);
+  if (ret) {
+    ALOGE("Failed to create event worker for d=%d %d\n", display, ret);
+    return HWC2::Error::BadDisplay;
+  }
+
+  return SetActiveConfig(default_config);
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::RegisterVsyncCallback(
+    hwc2_callback_data_t data, hwc2_function_pointer_t func) {
+  supported(__func__);
+  auto callback = std::make_shared<DrmVsyncCallback>(data, func);
+  vsync_worker_.RegisterCallback(std::move(callback));
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::AcceptDisplayChanges() {
+  supported(__func__);
+  uint32_t num_changes = 0;
+  for (std::pair<const hwc2_layer_t, DrmHwcTwo::HwcLayer> &l : layers_)
+    l.second.accept_type_change();
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::CreateLayer(hwc2_layer_t *layer) {
+  supported(__func__);
+  layers_.emplace(static_cast<hwc2_layer_t>(layer_idx_), HwcLayer());
+  *layer = static_cast<hwc2_layer_t>(layer_idx_);
+  ++layer_idx_;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::DestroyLayer(hwc2_layer_t layer) {
+  supported(__func__);
+  layers_.erase(layer);
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetActiveConfig(hwc2_config_t *config) {
+  supported(__func__);
+  DrmMode const &mode = connector_->active_mode();
+  if (mode.id() == 0)
+    return HWC2::Error::BadConfig;
+
+  *config = mode.id();
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetChangedCompositionTypes(
+    uint32_t *num_elements, hwc2_layer_t *layers, int32_t *types) {
+  supported(__func__);
+  uint32_t num_changes = 0;
+  for (std::pair<const hwc2_layer_t, DrmHwcTwo::HwcLayer> &l : layers_) {
+    if (l.second.type_changed()) {
+      if (layers && num_changes < *num_elements)
+        layers[num_changes] = l.first;
+      if (types && num_changes < *num_elements)
+        types[num_changes] = static_cast<int32_t>(l.second.validated_type());
+      ++num_changes;
+    }
+  }
+  if (!layers && !types)
+    *num_elements = num_changes;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetClientTargetSupport(uint32_t width,
+                                                          uint32_t height,
+                                                          int32_t /*format*/,
+                                                          int32_t dataspace) {
+  supported(__func__);
+  std::pair<uint32_t, uint32_t> min = drm_->min_resolution();
+  std::pair<uint32_t, uint32_t> max = drm_->max_resolution();
+
+  if (width < min.first || height < min.second)
+    return HWC2::Error::Unsupported;
+
+  if (width > max.first || height > max.second)
+    return HWC2::Error::Unsupported;
+
+  if (dataspace != HAL_DATASPACE_UNKNOWN &&
+      dataspace != HAL_DATASPACE_STANDARD_UNSPECIFIED)
+    return HWC2::Error::Unsupported;
+
+  // TODO: Validate format can be handled by either GL or planes
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetColorModes(uint32_t *num_modes,
+                                                 int32_t *modes) {
+  supported(__func__);
+  if (!modes)
+    *num_modes = 1;
+
+  if (modes)
+    *modes = HAL_COLOR_MODE_NATIVE;
+
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayAttribute(hwc2_config_t config,
+                                                       int32_t attribute_in,
+                                                       int32_t *value) {
+  supported(__func__);
+  auto mode =
+      std::find_if(connector_->modes().begin(), connector_->modes().end(),
+                   [config](DrmMode const &m) { return m.id() == config; });
+  if (mode == connector_->modes().end()) {
+    ALOGE("Could not find active mode for %d", config);
+    return HWC2::Error::BadConfig;
+  }
+
+  static const int32_t kUmPerInch = 25400;
+  uint32_t mm_width = connector_->mm_width();
+  uint32_t mm_height = connector_->mm_height();
+  auto attribute = static_cast<HWC2::Attribute>(attribute_in);
+  switch (attribute) {
+    case HWC2::Attribute::Width:
+      *value = mode->h_display();
+      break;
+    case HWC2::Attribute::Height:
+      *value = mode->v_display();
+      break;
+    case HWC2::Attribute::VsyncPeriod:
+      // in nanoseconds
+      *value = 1000 * 1000 * 1000 / mode->v_refresh();
+      break;
+    case HWC2::Attribute::DpiX:
+      // Dots per 1000 inches
+      *value = mm_width ? (mode->h_display() * kUmPerInch) / mm_width : -1;
+      break;
+    case HWC2::Attribute::DpiY:
+      // Dots per 1000 inches
+      *value = mm_height ? (mode->v_display() * kUmPerInch) / mm_height : -1;
+      break;
+    default:
+      *value = -1;
+      return HWC2::Error::BadConfig;
+  }
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayConfigs(uint32_t *num_configs,
+                                                     hwc2_config_t *configs) {
+  supported(__func__);
+  // Since this callback is normally invoked twice (once to get the count, and
+  // once to populate configs), we don't really want to read the edid
+  // redundantly. Instead, only update the modes on the first invocation. While
+  // it's possible this will result in stale modes, it'll all come out in the
+  // wash when we try to set the active config later.
+  if (!configs) {
+    int ret = connector_->UpdateModes();
+    if (ret) {
+      ALOGE("Failed to update display modes %d", ret);
+      return HWC2::Error::BadDisplay;
+    }
+  }
+
+  auto num_modes = static_cast<uint32_t>(connector_->modes().size());
+  if (!configs) {
+    *num_configs = num_modes;
+    return HWC2::Error::None;
+  }
+
+  uint32_t idx = 0;
+  for (const DrmMode &mode : connector_->modes()) {
+    if (idx >= *num_configs)
+      break;
+    configs[idx++] = mode.id();
+  }
+  *num_configs = idx;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayName(uint32_t *size, char *name) {
+  supported(__func__);
+  std::ostringstream stream;
+  stream << "display-" << connector_->id();
+  std::string string = stream.str();
+  size_t length = string.length();
+  if (!name) {
+    *size = length;
+    return HWC2::Error::None;
+  }
+
+  *size = std::min<uint32_t>(static_cast<uint32_t>(length - 1), *size);
+  strncpy(name, string.c_str(), *size);
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayRequests(int32_t *display_requests,
+                                                      uint32_t *num_elements,
+                                                      hwc2_layer_t *layers,
+                                                      int32_t *layer_requests) {
+  supported(__func__);
+  // TODO: I think virtual display should request
+  //      HWC2_DISPLAY_REQUEST_WRITE_CLIENT_TARGET_TO_OUTPUT here
+  unsupported(__func__, display_requests, num_elements, layers, layer_requests);
+  *num_elements = 0;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayType(int32_t *type) {
+  supported(__func__);
+  *type = static_cast<int32_t>(type_);
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetDozeSupport(int32_t *support) {
+  supported(__func__);
+  *support = 0;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetHdrCapabilities(
+    uint32_t *num_types, int32_t */*types*/, float */*max_luminance*/,
+    float */*max_average_luminance*/, float */*min_luminance*/) {
+  supported(__func__);
+  *num_types = 0;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::GetReleaseFences(uint32_t *num_elements,
+                                                    hwc2_layer_t *layers,
+                                                    int32_t *fences) {
+  supported(__func__);
+  uint32_t num_layers = 0;
+
+  for (std::pair<const hwc2_layer_t, DrmHwcTwo::HwcLayer> &l : layers_) {
+    ++num_layers;
+    if (layers == NULL || fences == NULL) {
+      continue;
+    } else if (num_layers > *num_elements) {
+      ALOGW("Overflow num_elements %d/%d", num_layers, *num_elements);
+      return HWC2::Error::None;
+    }
+
+    layers[num_layers - 1] = l.first;
+    fences[num_layers - 1] = l.second.take_release_fence();
+  }
+  *num_elements = num_layers;
+  return HWC2::Error::None;
+}
+
+void DrmHwcTwo::HwcDisplay::AddFenceToRetireFence(int fd) {
+  supported(__func__);
+  if (fd < 0)
+    return;
+
+  if (next_retire_fence_.get() >= 0) {
+    int old_fence = next_retire_fence_.get();
+    next_retire_fence_.Set(sync_merge("dc_retire", old_fence, fd));
+  } else {
+    next_retire_fence_.Set(dup(fd));
+  }
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::PresentDisplay(int32_t *retire_fence) {
+  supported(__func__);
+  std::vector<DrmCompositionDisplayLayersMap> layers_map;
+  layers_map.emplace_back();
+  DrmCompositionDisplayLayersMap &map = layers_map.back();
+
+  map.display = static_cast<int>(handle_);
+  map.geometry_changed = true;  // TODO: Fix this
+
+  // order the layers by z-order
+  bool use_client_layer = false;
+  uint32_t client_z_order = 0;
+  std::map<uint32_t, DrmHwcTwo::HwcLayer *> z_map;
+  for (std::pair<const hwc2_layer_t, DrmHwcTwo::HwcLayer> &l : layers_) {
+    switch (l.second.validated_type()) {
+      case HWC2::Composition::Device:
+        z_map.emplace(std::make_pair(l.second.z_order(), &l.second));
+        break;
+      case HWC2::Composition::Client:
+        // Place it at the z_order of the highest client layer
+        use_client_layer = true;
+        client_z_order = std::max(client_z_order, l.second.z_order());
+        break;
+      default:
+        continue;
+    }
+  }
+  if (use_client_layer)
+    z_map.emplace(std::make_pair(client_z_order, &client_layer_));
+
+  // now that they're ordered by z, add them to the composition
+  for (std::pair<const uint32_t, DrmHwcTwo::HwcLayer *> &l : z_map) {
+    DrmHwcLayer layer;
+    l.second->PopulateDrmLayer(&layer);
+    int ret = layer.ImportBuffer(importer_.get(), gralloc_);
+    if (ret) {
+      ALOGE("Failed to import layer, ret=%d", ret);
+      return HWC2::Error::NoResources;
+    }
+    map.layers.emplace_back(std::move(layer));
+  }
+  if (map.layers.empty()) {
+    *retire_fence = -1;
+    return HWC2::Error::None;
+  }
+
+  std::unique_ptr<DrmDisplayComposition> composition =
+      compositor_.CreateComposition();
+  composition->Init(drm_, crtc_, importer_.get(), planner_.get(), frame_no_);
+
+  // TODO: Don't always assume geometry changed
+  int ret = composition->SetLayers(map.layers.data(), map.layers.size(), true);
+  if (ret) {
+    ALOGE("Failed to set layers in the composition ret=%d", ret);
+    return HWC2::Error::BadLayer;
+  }
+
+  std::vector<DrmPlane *> primary_planes(primary_planes_);
+  std::vector<DrmPlane *> overlay_planes(overlay_planes_);
+  ret = composition->Plan(compositor_.squash_state(), &primary_planes,
+                         &overlay_planes);
+  if (ret) {
+    ALOGE("Failed to plan the composition ret=%d", ret);
+    return HWC2::Error::BadConfig;
+  }
+
+  // Disable the planes we're not using
+  for (auto i = primary_planes.begin(); i != primary_planes.end();) {
+    composition->AddPlaneDisable(*i);
+    i = primary_planes.erase(i);
+  }
+  for (auto i = overlay_planes.begin(); i != overlay_planes.end();) {
+    composition->AddPlaneDisable(*i);
+    i = overlay_planes.erase(i);
+  }
+
+  ret = compositor_.QueueComposition(std::move(composition));
+  if (ret) {
+    ALOGE("Failed to apply the frame composition ret=%d", ret);
+    return HWC2::Error::BadParameter;
+  }
+
+  // Now that the release fences have been generated by the compositor, make
+  // sure they're managed properly
+  for (std::pair<const uint32_t, DrmHwcTwo::HwcLayer *> &l : z_map) {
+    l.second->manage_release_fence();
+    AddFenceToRetireFence(l.second->release_fence());
+  }
+
+  // The retire fence returned here is for the last frame, so return it and
+  // promote the next retire fence
+  *retire_fence = retire_fence_.Release();
+  retire_fence_ = std::move(next_retire_fence_);
+
+  ++frame_no_;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::SetActiveConfig(hwc2_config_t config) {
+  supported(__func__);
+  auto mode =
+      std::find_if(connector_->modes().begin(), connector_->modes().end(),
+                   [config](DrmMode const &m) { return m.id() == config; });
+  if (mode == connector_->modes().end()) {
+    ALOGE("Could not find active mode for %d", config);
+    return HWC2::Error::BadConfig;
+  }
+
+  std::unique_ptr<DrmDisplayComposition> composition =
+      compositor_.CreateComposition();
+  composition->Init(drm_, crtc_, importer_.get(), planner_.get(), frame_no_);
+  int ret = composition->SetDisplayMode(*mode);
+  ret = compositor_.QueueComposition(std::move(composition));
+  if (ret) {
+    ALOGE("Failed to queue dpms composition on %d", ret);
+    return HWC2::Error::BadConfig;
+  }
+  if (connector_->active_mode().id() == 0)
+    connector_->set_active_mode(*mode);
+
+  // Setup the client layer's dimensions
+  hwc_rect_t display_frame = {.left = 0,
+                              .top = 0,
+                              .right = static_cast<int>(mode->h_display()),
+                              .bottom = static_cast<int>(mode->v_display())};
+  client_layer_.SetLayerDisplayFrame(display_frame);
+  hwc_frect_t source_crop = {.left = 0.0f,
+                             .top = 0.0f,
+                             .right = mode->h_display() + 0.0f,
+                             .bottom = mode->v_display() + 0.0f};
+  client_layer_.SetLayerSourceCrop(source_crop);
+
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::SetClientTarget(buffer_handle_t target,
+                                                   int32_t acquire_fence,
+                                                   int32_t dataspace,
+                                                   hwc_region_t damage) {
+  supported(__func__);
+  UniqueFd uf(acquire_fence);
+
+  client_layer_.set_buffer(target);
+  client_layer_.set_acquire_fence(uf.get());
+  client_layer_.SetLayerDataspace(dataspace);
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::SetColorMode(int32_t mode) {
+  supported(__func__);
+
+  if (mode != HAL_COLOR_MODE_NATIVE)
+    return HWC2::Error::Unsupported;
+
+  color_mode_ = mode;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::SetColorTransform(const float *matrix,
+                                                     int32_t hint) {
+  supported(__func__);
+  // TODO: Force client composition if we get this
+  return unsupported(__func__, matrix, hint);
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::SetOutputBuffer(buffer_handle_t buffer,
+                                                   int32_t release_fence) {
+  supported(__func__);
+  // TODO: Need virtual display support
+  return unsupported(__func__, buffer, release_fence);
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::SetPowerMode(int32_t mode_in) {
+  supported(__func__);
+  uint64_t dpms_value = 0;
+  auto mode = static_cast<HWC2::PowerMode>(mode_in);
+  switch (mode) {
+    case HWC2::PowerMode::Off:
+      dpms_value = DRM_MODE_DPMS_OFF;
+      break;
+    case HWC2::PowerMode::On:
+      dpms_value = DRM_MODE_DPMS_ON;
+      break;
+    default:
+      ALOGI("Power mode %d is unsupported\n", mode);
+      return HWC2::Error::Unsupported;
+  };
+
+  std::unique_ptr<DrmDisplayComposition> composition =
+      compositor_.CreateComposition();
+  composition->Init(drm_, crtc_, importer_.get(), planner_.get(), frame_no_);
+  composition->SetDpmsMode(dpms_value);
+  int ret = compositor_.QueueComposition(std::move(composition));
+  if (ret) {
+    ALOGE("Failed to apply the dpms composition ret=%d", ret);
+    return HWC2::Error::BadParameter;
+  }
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::SetVsyncEnabled(int32_t enabled) {
+  supported(__func__);
+  vsync_worker_.VSyncControl(enabled);
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcDisplay::ValidateDisplay(uint32_t *num_types,
+                                                   uint32_t *num_requests) {
+  supported(__func__);
+  *num_types = 0;
+  *num_requests = 0;
+  for (std::pair<const hwc2_layer_t, DrmHwcTwo::HwcLayer> &l : layers_) {
+    DrmHwcTwo::HwcLayer &layer = l.second;
+    switch (layer.sf_type()) {
+      case HWC2::Composition::SolidColor:
+      case HWC2::Composition::Cursor:
+      case HWC2::Composition::Sideband:
+        layer.set_validated_type(HWC2::Composition::Client);
+        ++*num_types;
+        break;
+      default:
+        layer.set_validated_type(layer.sf_type());
+        break;
+    }
+  }
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetCursorPosition(int32_t x, int32_t y) {
+  supported(__func__);
+  cursor_x_ = x;
+  cursor_y_ = y;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerBlendMode(int32_t mode) {
+  supported(__func__);
+  blending_ = static_cast<HWC2::BlendMode>(mode);
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerBuffer(buffer_handle_t buffer,
+                                                int32_t acquire_fence) {
+  supported(__func__);
+  UniqueFd uf(acquire_fence);
+
+  // The buffer and acquire_fence are handled elsewhere
+  if (sf_type_ == HWC2::Composition::Client ||
+      sf_type_ == HWC2::Composition::Sideband ||
+      sf_type_ == HWC2::Composition::SolidColor)
+    return HWC2::Error::None;
+
+  set_buffer(buffer);
+  set_acquire_fence(uf.get());
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerColor(hwc_color_t color) {
+  // TODO: Punt to client composition here?
+  return unsupported(__func__, color);
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerCompositionType(int32_t type) {
+  sf_type_ = static_cast<HWC2::Composition>(type);
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerDataspace(int32_t dataspace) {
+  supported(__func__);
+  dataspace_ = static_cast<android_dataspace_t>(dataspace);
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerDisplayFrame(hwc_rect_t frame) {
+  supported(__func__);
+  display_frame_ = frame;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerPlaneAlpha(float alpha) {
+  supported(__func__);
+  alpha_ = alpha;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerSidebandStream(
+    const native_handle_t *stream) {
+  supported(__func__);
+  // TODO: We don't support sideband
+  return unsupported(__func__, stream);
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerSourceCrop(hwc_frect_t crop) {
+  supported(__func__);
+  source_crop_ = crop;
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerSurfaceDamage(hwc_region_t damage) {
+  supported(__func__);
+  // TODO: We don't use surface damage, marking as unsupported
+  unsupported(__func__, damage);
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerTransform(int32_t transform) {
+  supported(__func__);
+  transform_ = static_cast<HWC2::Transform>(transform);
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerVisibleRegion(hwc_region_t visible) {
+  supported(__func__);
+  // TODO: We don't use this information, marking as unsupported
+  unsupported(__func__, visible);
+  return HWC2::Error::None;
+}
+
+HWC2::Error DrmHwcTwo::HwcLayer::SetLayerZOrder(uint32_t order) {
+  supported(__func__);
+  z_order_ = order;
+  return HWC2::Error::None;
+}
+
+void DrmHwcTwo::HwcLayer::PopulateDrmLayer(DrmHwcLayer *layer) {
+  supported(__func__);
+  switch (blending_) {
+    case HWC2::BlendMode::None:
+      layer->blending = DrmHwcBlending::kNone;
+      break;
+    case HWC2::BlendMode::Premultiplied:
+      layer->blending = DrmHwcBlending::kPreMult;
+      break;
+    case HWC2::BlendMode::Coverage:
+      layer->blending = DrmHwcBlending::kCoverage;
+      break;
+    default:
+      ALOGE("Unknown blending mode b=%d", blending_);
+      layer->blending = DrmHwcBlending::kNone;
+      break;
+  }
+
+  OutputFd release_fence = release_fence_output();
+
+  layer->sf_handle = buffer_;
+  layer->acquire_fence = acquire_fence_.Release();
+  layer->release_fence = std::move(release_fence);
+  layer->SetDisplayFrame(display_frame_);
+  layer->alpha = static_cast<uint8_t>(255.0f * alpha_ + 0.5f);
+  layer->SetSourceCrop(source_crop_);
+  layer->SetTransform(static_cast<int32_t>(transform_));
+}
+
+// static
+int DrmHwcTwo::HookDevClose(hw_device_t * /*dev*/) {
+  unsupported(__func__);
+  return 0;
+}
+
+// static
+void DrmHwcTwo::HookDevGetCapabilities(hwc2_device_t * /*dev*/,
+                                       uint32_t *out_count,
+                                       int32_t * /*out_capabilities*/) {
+  supported(__func__);
+  *out_count = 0;
+}
+
+// static
+hwc2_function_pointer_t DrmHwcTwo::HookDevGetFunction(
+    struct hwc2_device * /*dev*/, int32_t descriptor) {
+  supported(__func__);
+  auto func = static_cast<HWC2::FunctionDescriptor>(descriptor);
+  switch (func) {
+    // Device functions
+    case HWC2::FunctionDescriptor::CreateVirtualDisplay:
+      return ToHook<HWC2_PFN_CREATE_VIRTUAL_DISPLAY>(
+          DeviceHook<int32_t, decltype(&DrmHwcTwo::CreateVirtualDisplay),
+                     &DrmHwcTwo::CreateVirtualDisplay, uint32_t, uint32_t,
+                     int32_t*, hwc2_display_t *>);
+    case HWC2::FunctionDescriptor::DestroyVirtualDisplay:
+      return ToHook<HWC2_PFN_DESTROY_VIRTUAL_DISPLAY>(
+          DeviceHook<int32_t, decltype(&DrmHwcTwo::DestroyVirtualDisplay),
+                     &DrmHwcTwo::DestroyVirtualDisplay, hwc2_display_t>);
+    case HWC2::FunctionDescriptor::Dump:
+      return ToHook<HWC2_PFN_DUMP>(
+          DeviceHook<void, decltype(&DrmHwcTwo::Dump), &DrmHwcTwo::Dump,
+                     uint32_t *, char *>);
+    case HWC2::FunctionDescriptor::GetMaxVirtualDisplayCount:
+      return ToHook<HWC2_PFN_GET_MAX_VIRTUAL_DISPLAY_COUNT>(
+          DeviceHook<uint32_t, decltype(&DrmHwcTwo::GetMaxVirtualDisplayCount),
+                     &DrmHwcTwo::GetMaxVirtualDisplayCount>);
+    case HWC2::FunctionDescriptor::RegisterCallback:
+      return ToHook<HWC2_PFN_REGISTER_CALLBACK>(
+          DeviceHook<int32_t, decltype(&DrmHwcTwo::RegisterCallback),
+                     &DrmHwcTwo::RegisterCallback, int32_t,
+                     hwc2_callback_data_t, hwc2_function_pointer_t>);
+
+    // Display functions
+    case HWC2::FunctionDescriptor::AcceptDisplayChanges:
+      return ToHook<HWC2_PFN_ACCEPT_DISPLAY_CHANGES>(
+          DisplayHook<decltype(&HwcDisplay::AcceptDisplayChanges),
+                      &HwcDisplay::AcceptDisplayChanges>);
+    case HWC2::FunctionDescriptor::CreateLayer:
+      return ToHook<HWC2_PFN_CREATE_LAYER>(
+          DisplayHook<decltype(&HwcDisplay::CreateLayer),
+                      &HwcDisplay::CreateLayer, hwc2_layer_t *>);
+    case HWC2::FunctionDescriptor::DestroyLayer:
+      return ToHook<HWC2_PFN_DESTROY_LAYER>(
+          DisplayHook<decltype(&HwcDisplay::DestroyLayer),
+                      &HwcDisplay::DestroyLayer, hwc2_layer_t>);
+    case HWC2::FunctionDescriptor::GetActiveConfig:
+      return ToHook<HWC2_PFN_GET_ACTIVE_CONFIG>(
+          DisplayHook<decltype(&HwcDisplay::GetActiveConfig),
+                      &HwcDisplay::GetActiveConfig, hwc2_config_t *>);
+    case HWC2::FunctionDescriptor::GetChangedCompositionTypes:
+      return ToHook<HWC2_PFN_GET_CHANGED_COMPOSITION_TYPES>(
+          DisplayHook<decltype(&HwcDisplay::GetChangedCompositionTypes),
+                      &HwcDisplay::GetChangedCompositionTypes, uint32_t *,
+                      hwc2_layer_t *, int32_t *>);
+    case HWC2::FunctionDescriptor::GetClientTargetSupport:
+      return ToHook<HWC2_PFN_GET_CLIENT_TARGET_SUPPORT>(
+          DisplayHook<decltype(&HwcDisplay::GetClientTargetSupport),
+                      &HwcDisplay::GetClientTargetSupport, uint32_t, uint32_t,
+                      int32_t, int32_t>);
+    case HWC2::FunctionDescriptor::GetColorModes:
+      return ToHook<HWC2_PFN_GET_COLOR_MODES>(
+          DisplayHook<decltype(&HwcDisplay::GetColorModes),
+                      &HwcDisplay::GetColorModes, uint32_t *, int32_t *>);
+    case HWC2::FunctionDescriptor::GetDisplayAttribute:
+      return ToHook<HWC2_PFN_GET_DISPLAY_ATTRIBUTE>(DisplayHook<
+          decltype(&HwcDisplay::GetDisplayAttribute),
+          &HwcDisplay::GetDisplayAttribute, hwc2_config_t, int32_t, int32_t *>);
+    case HWC2::FunctionDescriptor::GetDisplayConfigs:
+      return ToHook<HWC2_PFN_GET_DISPLAY_CONFIGS>(DisplayHook<
+          decltype(&HwcDisplay::GetDisplayConfigs),
+          &HwcDisplay::GetDisplayConfigs, uint32_t *, hwc2_config_t *>);
+    case HWC2::FunctionDescriptor::GetDisplayName:
+      return ToHook<HWC2_PFN_GET_DISPLAY_NAME>(
+          DisplayHook<decltype(&HwcDisplay::GetDisplayName),
+                      &HwcDisplay::GetDisplayName, uint32_t *, char *>);
+    case HWC2::FunctionDescriptor::GetDisplayRequests:
+      return ToHook<HWC2_PFN_GET_DISPLAY_REQUESTS>(
+          DisplayHook<decltype(&HwcDisplay::GetDisplayRequests),
+                      &HwcDisplay::GetDisplayRequests, int32_t *, uint32_t *,
+                      hwc2_layer_t *, int32_t *>);
+    case HWC2::FunctionDescriptor::GetDisplayType:
+      return ToHook<HWC2_PFN_GET_DISPLAY_TYPE>(
+          DisplayHook<decltype(&HwcDisplay::GetDisplayType),
+                      &HwcDisplay::GetDisplayType, int32_t *>);
+    case HWC2::FunctionDescriptor::GetDozeSupport:
+      return ToHook<HWC2_PFN_GET_DOZE_SUPPORT>(
+          DisplayHook<decltype(&HwcDisplay::GetDozeSupport),
+                      &HwcDisplay::GetDozeSupport, int32_t *>);
+    case HWC2::FunctionDescriptor::GetHdrCapabilities:
+      return ToHook<HWC2_PFN_GET_HDR_CAPABILITIES>(
+          DisplayHook<decltype(&HwcDisplay::GetHdrCapabilities),
+                      &HwcDisplay::GetHdrCapabilities, uint32_t *, int32_t *,
+                      float *, float *, float *>);
+    case HWC2::FunctionDescriptor::GetReleaseFences:
+      return ToHook<HWC2_PFN_GET_RELEASE_FENCES>(
+          DisplayHook<decltype(&HwcDisplay::GetReleaseFences),
+                      &HwcDisplay::GetReleaseFences, uint32_t *, hwc2_layer_t *,
+                      int32_t *>);
+    case HWC2::FunctionDescriptor::PresentDisplay:
+      return ToHook<HWC2_PFN_PRESENT_DISPLAY>(
+          DisplayHook<decltype(&HwcDisplay::PresentDisplay),
+                      &HwcDisplay::PresentDisplay, int32_t *>);
+    case HWC2::FunctionDescriptor::SetActiveConfig:
+      return ToHook<HWC2_PFN_SET_ACTIVE_CONFIG>(
+          DisplayHook<decltype(&HwcDisplay::SetActiveConfig),
+                      &HwcDisplay::SetActiveConfig, hwc2_config_t>);
+    case HWC2::FunctionDescriptor::SetClientTarget:
+      return ToHook<HWC2_PFN_SET_CLIENT_TARGET>(DisplayHook<
+          decltype(&HwcDisplay::SetClientTarget), &HwcDisplay::SetClientTarget,
+          buffer_handle_t, int32_t, int32_t, hwc_region_t>);
+    case HWC2::FunctionDescriptor::SetColorMode:
+      return ToHook<HWC2_PFN_SET_COLOR_MODE>(
+          DisplayHook<decltype(&HwcDisplay::SetColorMode),
+                      &HwcDisplay::SetColorMode, int32_t>);
+    case HWC2::FunctionDescriptor::SetColorTransform:
+      return ToHook<HWC2_PFN_SET_COLOR_TRANSFORM>(
+          DisplayHook<decltype(&HwcDisplay::SetColorTransform),
+                      &HwcDisplay::SetColorTransform, const float *, int32_t>);
+    case HWC2::FunctionDescriptor::SetOutputBuffer:
+      return ToHook<HWC2_PFN_SET_OUTPUT_BUFFER>(
+          DisplayHook<decltype(&HwcDisplay::SetOutputBuffer),
+                      &HwcDisplay::SetOutputBuffer, buffer_handle_t, int32_t>);
+    case HWC2::FunctionDescriptor::SetPowerMode:
+      return ToHook<HWC2_PFN_SET_POWER_MODE>(
+          DisplayHook<decltype(&HwcDisplay::SetPowerMode),
+                      &HwcDisplay::SetPowerMode, int32_t>);
+    case HWC2::FunctionDescriptor::SetVsyncEnabled:
+      return ToHook<HWC2_PFN_SET_VSYNC_ENABLED>(
+          DisplayHook<decltype(&HwcDisplay::SetVsyncEnabled),
+                      &HwcDisplay::SetVsyncEnabled, int32_t>);
+    case HWC2::FunctionDescriptor::ValidateDisplay:
+      return ToHook<HWC2_PFN_VALIDATE_DISPLAY>(
+          DisplayHook<decltype(&HwcDisplay::ValidateDisplay),
+                      &HwcDisplay::ValidateDisplay, uint32_t *, uint32_t *>);
+
+    // Layer functions
+    case HWC2::FunctionDescriptor::SetCursorPosition:
+      return ToHook<HWC2_PFN_SET_CURSOR_POSITION>(
+          LayerHook<decltype(&HwcLayer::SetCursorPosition),
+                    &HwcLayer::SetCursorPosition, int32_t, int32_t>);
+    case HWC2::FunctionDescriptor::SetLayerBlendMode:
+      return ToHook<HWC2_PFN_SET_LAYER_BLEND_MODE>(
+          LayerHook<decltype(&HwcLayer::SetLayerBlendMode),
+                    &HwcLayer::SetLayerBlendMode, int32_t>);
+    case HWC2::FunctionDescriptor::SetLayerBuffer:
+      return ToHook<HWC2_PFN_SET_LAYER_BUFFER>(
+          LayerHook<decltype(&HwcLayer::SetLayerBuffer),
+                    &HwcLayer::SetLayerBuffer, buffer_handle_t, int32_t>);
+    case HWC2::FunctionDescriptor::SetLayerColor:
+      return ToHook<HWC2_PFN_SET_LAYER_COLOR>(
+          LayerHook<decltype(&HwcLayer::SetLayerColor),
+                    &HwcLayer::SetLayerColor, hwc_color_t>);
+    case HWC2::FunctionDescriptor::SetLayerCompositionType:
+      return ToHook<HWC2_PFN_SET_LAYER_COMPOSITION_TYPE>(
+          LayerHook<decltype(&HwcLayer::SetLayerCompositionType),
+                    &HwcLayer::SetLayerCompositionType, int32_t>);
+    case HWC2::FunctionDescriptor::SetLayerDataspace:
+      return ToHook<HWC2_PFN_SET_LAYER_DATASPACE>(
+          LayerHook<decltype(&HwcLayer::SetLayerDataspace),
+                    &HwcLayer::SetLayerDataspace, int32_t>);
+    case HWC2::FunctionDescriptor::SetLayerDisplayFrame:
+      return ToHook<HWC2_PFN_SET_LAYER_DISPLAY_FRAME>(
+          LayerHook<decltype(&HwcLayer::SetLayerDisplayFrame),
+                    &HwcLayer::SetLayerDisplayFrame, hwc_rect_t>);
+    case HWC2::FunctionDescriptor::SetLayerPlaneAlpha:
+      return ToHook<HWC2_PFN_SET_LAYER_PLANE_ALPHA>(
+          LayerHook<decltype(&HwcLayer::SetLayerPlaneAlpha),
+                    &HwcLayer::SetLayerPlaneAlpha, float>);
+    case HWC2::FunctionDescriptor::SetLayerSidebandStream:
+      return ToHook<HWC2_PFN_SET_LAYER_SIDEBAND_STREAM>(LayerHook<
+          decltype(&HwcLayer::SetLayerSidebandStream),
+          &HwcLayer::SetLayerSidebandStream, const native_handle_t *>);
+    case HWC2::FunctionDescriptor::SetLayerSourceCrop:
+      return ToHook<HWC2_PFN_SET_LAYER_SOURCE_CROP>(
+          LayerHook<decltype(&HwcLayer::SetLayerSourceCrop),
+                    &HwcLayer::SetLayerSourceCrop, hwc_frect_t>);
+    case HWC2::FunctionDescriptor::SetLayerSurfaceDamage:
+      return ToHook<HWC2_PFN_SET_LAYER_SURFACE_DAMAGE>(
+          LayerHook<decltype(&HwcLayer::SetLayerSurfaceDamage),
+                    &HwcLayer::SetLayerSurfaceDamage, hwc_region_t>);
+    case HWC2::FunctionDescriptor::SetLayerTransform:
+      return ToHook<HWC2_PFN_SET_LAYER_TRANSFORM>(
+          LayerHook<decltype(&HwcLayer::SetLayerTransform),
+                    &HwcLayer::SetLayerTransform, int32_t>);
+    case HWC2::FunctionDescriptor::SetLayerVisibleRegion:
+      return ToHook<HWC2_PFN_SET_LAYER_VISIBLE_REGION>(
+          LayerHook<decltype(&HwcLayer::SetLayerVisibleRegion),
+                    &HwcLayer::SetLayerVisibleRegion, hwc_region_t>);
+    case HWC2::FunctionDescriptor::SetLayerZOrder:
+      return ToHook<HWC2_PFN_SET_LAYER_Z_ORDER>(
+          LayerHook<decltype(&HwcLayer::SetLayerZOrder),
+                    &HwcLayer::SetLayerZOrder, uint32_t>);
+    case HWC2::FunctionDescriptor::Invalid:
+    default:
+      return NULL;
+  }
+}
+
+// static
+int DrmHwcTwo::HookDevOpen(const struct hw_module_t *module, const char *name,
+                           struct hw_device_t **dev) {
+  supported(__func__);
+  if (strcmp(name, HWC_HARDWARE_COMPOSER)) {
+    ALOGE("Invalid module name- %s", name);
+    return -EINVAL;
+  }
+
+  std::unique_ptr<DrmHwcTwo> ctx(new DrmHwcTwo());
+  if (!ctx) {
+    ALOGE("Failed to allocate DrmHwcTwo");
+    return -ENOMEM;
+  }
+
+  HWC2::Error err = ctx->Init();
+  if (err != HWC2::Error::None) {
+    ALOGE("Failed to initialize DrmHwcTwo err=%d\n", err);
+    return -EINVAL;
+  }
+
+  ctx->common.module = const_cast<hw_module_t *>(module);
+  *dev = &ctx->common;
+  ctx.release();
+  return 0;
+}
+}
+
+static struct hw_module_methods_t hwc2_module_methods = {
+    .open = android::DrmHwcTwo::HookDevOpen,
+};
+
+hw_module_t HAL_MODULE_INFO_SYM = {
+    .tag = HARDWARE_MODULE_TAG,
+    .module_api_version = HARDWARE_MODULE_API_VERSION(2, 0),
+    .id = HWC_HARDWARE_MODULE_ID,
+    .name = "DrmHwcTwo module",
+    .author = "The Android Open Source Project",
+    .methods = &hwc2_module_methods,
+    .dso = NULL,
+    .reserved = {0},
+};
diff --git a/drmhwctwo.h b/drmhwctwo.h
new file mode 100644
index 0000000..0490e2a
--- /dev/null
+++ b/drmhwctwo.h
@@ -0,0 +1,271 @@
+/*
+ * 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.
+ */
+
+#include "drmdisplaycompositor.h"
+#include "drmhwcomposer.h"
+#include "drmresources.h"
+#include "platform.h"
+#include "vsyncworker.h"
+
+#include <hardware/hwcomposer2.h>
+
+#include <map>
+
+namespace android {
+
+class DrmHwcTwo : public hwc2_device_t {
+ public:
+  static int HookDevOpen(const struct hw_module_t *module, const char *name,
+                         struct hw_device_t **dev);
+
+  DrmHwcTwo();
+
+  HWC2::Error Init();
+
+ private:
+  class HwcLayer {
+   public:
+    HWC2::Composition sf_type() const {
+      return sf_type_;
+    }
+    HWC2::Composition validated_type() const {
+      return validated_type_;
+    }
+    void accept_type_change() {
+      sf_type_ = validated_type_;
+    }
+    void set_validated_type(HWC2::Composition type) {
+      validated_type_ = type;
+    }
+    bool type_changed() const {
+      return sf_type_ != validated_type_;
+    }
+
+    uint32_t z_order() const {
+      return z_order_;
+    }
+
+    buffer_handle_t buffer() {
+      return buffer_;
+    }
+    void set_buffer(buffer_handle_t buffer) {
+      buffer_ = buffer;
+    }
+
+    int take_acquire_fence() {
+      return acquire_fence_.Release();
+    }
+    void set_acquire_fence(int acquire_fence) {
+      acquire_fence_.Set(dup(acquire_fence));
+    }
+
+    int release_fence() {
+      return release_fence_.get();
+    }
+    int take_release_fence() {
+      return release_fence_.Release();
+    }
+    void manage_release_fence() {
+      release_fence_.Set(release_fence_raw_);
+      release_fence_raw_ = -1;
+    }
+    OutputFd release_fence_output() {
+      return OutputFd(&release_fence_raw_);
+    }
+
+    void PopulateDrmLayer(DrmHwcLayer *layer);
+
+    // Layer hooks
+    HWC2::Error SetCursorPosition(int32_t x, int32_t y);
+    HWC2::Error SetLayerBlendMode(int32_t mode);
+    HWC2::Error SetLayerBuffer(buffer_handle_t buffer, int32_t acquire_fence);
+    HWC2::Error SetLayerColor(hwc_color_t color);
+    HWC2::Error SetLayerCompositionType(int32_t type);
+    HWC2::Error SetLayerDataspace(int32_t dataspace);
+    HWC2::Error SetLayerDisplayFrame(hwc_rect_t frame);
+    HWC2::Error SetLayerPlaneAlpha(float alpha);
+    HWC2::Error SetLayerSidebandStream(const native_handle_t *stream);
+    HWC2::Error SetLayerSourceCrop(hwc_frect_t crop);
+    HWC2::Error SetLayerSurfaceDamage(hwc_region_t damage);
+    HWC2::Error SetLayerTransform(int32_t transform);
+    HWC2::Error SetLayerVisibleRegion(hwc_region_t visible);
+    HWC2::Error SetLayerZOrder(uint32_t z);
+
+   private:
+    // sf_type_ stores the initial type given to us by surfaceflinger,
+    // validated_type_ stores the type after running ValidateDisplay
+    HWC2::Composition sf_type_ = HWC2::Composition::Invalid;
+    HWC2::Composition validated_type_ = HWC2::Composition::Invalid;
+
+    HWC2::BlendMode blending_ = HWC2::BlendMode::None;
+    buffer_handle_t buffer_;
+    UniqueFd acquire_fence_;
+    int release_fence_raw_ = -1;
+    UniqueFd release_fence_;
+    hwc_rect_t display_frame_;
+    float alpha_ = 1.0f;
+    hwc_frect_t source_crop_;
+    int32_t cursor_x_;
+    int32_t cursor_y_;
+    HWC2::Transform transform_ = HWC2::Transform::None;
+    uint32_t z_order_ = 0;
+    android_dataspace_t dataspace_ = HAL_DATASPACE_UNKNOWN;
+  };
+
+  struct HwcCallback {
+    HwcCallback(hwc2_callback_data_t d, hwc2_function_pointer_t f)
+        : data(d), func(f) {
+    }
+    hwc2_callback_data_t data;
+    hwc2_function_pointer_t func;
+  };
+
+  class HwcDisplay {
+   public:
+    HwcDisplay(DrmResources *drm, std::shared_ptr<Importer> importer,
+               const gralloc_module_t *gralloc, hwc2_display_t handle,
+               HWC2::DisplayType type);
+    HwcDisplay(const HwcDisplay &) = delete;
+    HWC2::Error Init(std::vector<DrmPlane *> *planes);
+
+    HWC2::Error RegisterVsyncCallback(hwc2_callback_data_t data,
+                                      hwc2_function_pointer_t func);
+
+    // HWC Hooks
+    HWC2::Error AcceptDisplayChanges();
+    HWC2::Error CreateLayer(hwc2_layer_t *layer);
+    HWC2::Error DestroyLayer(hwc2_layer_t layer);
+    HWC2::Error GetActiveConfig(hwc2_config_t *config);
+    HWC2::Error GetChangedCompositionTypes(uint32_t *num_elements,
+                                           hwc2_layer_t *layers,
+                                           int32_t *types);
+    HWC2::Error GetClientTargetSupport(uint32_t width, uint32_t height,
+                                       int32_t format, int32_t dataspace);
+    HWC2::Error GetColorModes(uint32_t *num_modes, int32_t *modes);
+    HWC2::Error GetDisplayAttribute(hwc2_config_t config, int32_t attribute,
+                                    int32_t *value);
+    HWC2::Error GetDisplayConfigs(uint32_t *num_configs,
+                                  hwc2_config_t *configs);
+    HWC2::Error GetDisplayName(uint32_t *size, char *name);
+    HWC2::Error GetDisplayRequests(int32_t *display_requests,
+                                   uint32_t *num_elements, hwc2_layer_t *layers,
+                                   int32_t *layer_requests);
+    HWC2::Error GetDisplayType(int32_t *type);
+    HWC2::Error GetDozeSupport(int32_t *support);
+    HWC2::Error GetHdrCapabilities(uint32_t *num_types, int32_t *types,
+                                   float *max_luminance,
+                                   float *max_average_luminance,
+                                   float *min_luminance);
+    HWC2::Error GetReleaseFences(uint32_t *num_elements, hwc2_layer_t *layers,
+                                 int32_t *fences);
+    HWC2::Error PresentDisplay(int32_t *retire_fence);
+    HWC2::Error SetActiveConfig(hwc2_config_t config);
+    HWC2::Error SetClientTarget(buffer_handle_t target, int32_t acquire_fence,
+                                int32_t dataspace, hwc_region_t damage);
+    HWC2::Error SetColorMode(int32_t mode);
+    HWC2::Error SetColorTransform(const float *matrix, int32_t hint);
+    HWC2::Error SetOutputBuffer(buffer_handle_t buffer, int32_t release_fence);
+    HWC2::Error SetPowerMode(int32_t mode);
+    HWC2::Error SetVsyncEnabled(int32_t enabled);
+    HWC2::Error ValidateDisplay(uint32_t *num_types, uint32_t *num_requests);
+    HwcLayer &get_layer(hwc2_layer_t layer) {
+      return layers_.at(layer);
+    }
+
+   private:
+    void AddFenceToRetireFence(int fd);
+
+    DrmResources *drm_;
+    DrmDisplayCompositor compositor_;
+    std::shared_ptr<Importer> importer_;
+    std::unique_ptr<Planner> planner_;
+    const gralloc_module_t *gralloc_;
+
+    std::vector<DrmPlane *> primary_planes_;
+    std::vector<DrmPlane *> overlay_planes_;
+
+    VSyncWorker vsync_worker_;
+    DrmConnector *connector_ = NULL;
+    DrmCrtc *crtc_ = NULL;
+    hwc2_display_t handle_;
+    HWC2::DisplayType type_;
+    uint32_t layer_idx_ = 0;
+    std::map<hwc2_layer_t, HwcLayer> layers_;
+    HwcLayer client_layer_;
+    UniqueFd retire_fence_;
+    UniqueFd next_retire_fence_;
+    int32_t color_mode_;
+
+    uint32_t frame_no_ = 0;
+  };
+
+  static DrmHwcTwo *toDrmHwcTwo(hwc2_device_t *dev) {
+    return static_cast<DrmHwcTwo *>(dev);
+  }
+
+  template <typename PFN, typename T>
+  static hwc2_function_pointer_t ToHook(T function) {
+    static_assert(std::is_same<PFN, T>::value, "Incompatible fn pointer");
+    return reinterpret_cast<hwc2_function_pointer_t>(function);
+  }
+
+  template <typename T, typename HookType, HookType func, typename... Args>
+  static T DeviceHook(hwc2_device_t *dev, Args... args) {
+    DrmHwcTwo *hwc = toDrmHwcTwo(dev);
+    return static_cast<T>(((*hwc).*func)(std::forward<Args>(args)...));
+  }
+
+  template <typename HookType, HookType func, typename... Args>
+  static int32_t DisplayHook(hwc2_device_t *dev, hwc2_display_t display_handle,
+                             Args... args) {
+    DrmHwcTwo *hwc = toDrmHwcTwo(dev);
+    HwcDisplay &display = hwc->displays_.at(display_handle);
+    return static_cast<int32_t>((display.*func)(std::forward<Args>(args)...));
+  }
+
+  template <typename HookType, HookType func, typename... Args>
+  static int32_t LayerHook(hwc2_device_t *dev, hwc2_display_t display_handle,
+                           hwc2_layer_t layer_handle, Args... args) {
+    DrmHwcTwo *hwc = toDrmHwcTwo(dev);
+    HwcDisplay &display = hwc->displays_.at(display_handle);
+    HwcLayer &layer = display.get_layer(layer_handle);
+    return static_cast<int32_t>((layer.*func)(std::forward<Args>(args)...));
+  }
+
+  // hwc2_device_t hooks
+  static int HookDevClose(hw_device_t *dev);
+  static void HookDevGetCapabilities(hwc2_device_t *dev, uint32_t *out_count,
+                                     int32_t *out_capabilities);
+  static hwc2_function_pointer_t HookDevGetFunction(struct hwc2_device *device,
+                                                    int32_t descriptor);
+
+  // Device functions
+  HWC2::Error CreateVirtualDisplay(uint32_t width, uint32_t height,
+                                   int32_t *format,
+                                   hwc2_display_t *display);
+  HWC2::Error DestroyVirtualDisplay(hwc2_display_t display);
+  void Dump(uint32_t *size, char *buffer);
+  uint32_t GetMaxVirtualDisplayCount();
+  HWC2::Error RegisterCallback(int32_t descriptor, hwc2_callback_data_t data,
+                               hwc2_function_pointer_t function);
+
+  DrmResources drm_;
+  std::shared_ptr<Importer> importer_;  // Shared with HwcDisplay
+  const gralloc_module_t *gralloc_;
+  std::map<hwc2_display_t, HwcDisplay> displays_;
+  std::map<HWC2::Callback, HwcCallback> callbacks_;
+};
+}
diff --git a/drmresources.cpp b/drmresources.cpp
index e433239..6b8ed03 100644
--- a/drmresources.cpp
+++ b/drmresources.cpp
@@ -71,6 +71,11 @@
     return -ENODEV;
   }
 
+  min_resolution_ =
+      std::pair<uint32_t, uint32_t>(res->min_width, res->min_height);
+  max_resolution_ =
+      std::pair<uint32_t, uint32_t>(res->max_width, res->max_height);
+
   bool found_primary = false;
   int display_num = 1;
 
diff --git a/drmresources.h b/drmresources.h
index 64e6b57..011f87e 100644
--- a/drmresources.h
+++ b/drmresources.h
@@ -47,6 +47,14 @@
     return planes_;
   }
 
+  std::pair<uint32_t, uint32_t> min_resolution() const {
+    return min_resolution_;
+  }
+
+  std::pair<uint32_t, uint32_t> max_resolution() const {
+    return max_resolution_;
+  }
+
   DrmConnector *GetConnectorForDisplay(int display) const;
   DrmCrtc *GetCrtcForDisplay(int display) const;
   DrmPlane *GetPlane(uint32_t id) const;
@@ -83,6 +91,9 @@
   std::vector<std::unique_ptr<DrmPlane>> planes_;
   DrmCompositor compositor_;
   DrmEventListener event_listener_;
+
+  std::pair<uint32_t, uint32_t> min_resolution_;
+  std::pair<uint32_t, uint32_t> max_resolution_;
 };
 }
 
diff --git a/glworker.cpp b/glworker.cpp
index 6ce2de3..e12995e 100644
--- a/glworker.cpp
+++ b/glworker.cpp
@@ -35,14 +35,10 @@
 #include <utils/Trace.h>
 
 #include "drmdisplaycomposition.h"
+#include "platform.h"
 
 #include "glworker.h"
 
-// TODO(zachr): use hwc_drm_bo to turn buffer handles into textures
-#ifndef EGL_NATIVE_HANDLE_ANDROID_NVX
-#define EGL_NATIVE_HANDLE_ANDROID_NVX 0x322A
-#endif
-
 #define MAX_OVERLAPPING_LAYERS 64
 
 namespace android {
@@ -416,10 +412,9 @@
 
 static int CreateTextureFromHandle(EGLDisplay egl_display,
                                    buffer_handle_t handle,
+                                   Importer *importer,
                                    AutoEGLImageAndGLTexture *out) {
-  EGLImageKHR image = eglCreateImageKHR(
-      egl_display, EGL_NO_CONTEXT, EGL_NATIVE_HANDLE_ANDROID_NVX,
-      (EGLClientBuffer)handle, NULL /* no attribs */);
+  EGLImageKHR image = importer->ImportImage(egl_display, handle);
 
   if (image == EGL_NO_IMAGE_KHR) {
     ALOGE("Failed to make image %s %p", GetEGLError(), handle);
@@ -552,7 +547,8 @@
 int GLWorkerCompositor::Composite(DrmHwcLayer *layers,
                                   DrmCompositionRegion *regions,
                                   size_t num_regions,
-                                  const sp<GraphicBuffer> &framebuffer) {
+                                  const sp<GraphicBuffer> &framebuffer,
+                                  Importer *importer) {
   ATRACE_CALL();
   int ret = 0;
   std::vector<AutoEGLImageAndGLTexture> layer_textures;
@@ -590,7 +586,7 @@
       continue;
 
     ret = CreateTextureFromHandle(egl_display_, layer->get_usable_handle(),
-                                  &layer_textures.back());
+                                  importer, &layer_textures.back());
 
     if (!ret) {
       ret = EGLFenceWait(egl_display_, layer->acquire_fence.Release());
diff --git a/glworker.h b/glworker.h
index 222cf6f..158490c 100644
--- a/glworker.h
+++ b/glworker.h
@@ -43,7 +43,8 @@
 
   int Init();
   int Composite(DrmHwcLayer *layers, DrmCompositionRegion *regions,
-                size_t num_regions, const sp<GraphicBuffer> &framebuffer);
+                size_t num_regions, const sp<GraphicBuffer> &framebuffer,
+                Importer *importer);
   void Finish();
 
  private:
diff --git a/hwcomposer.cpp b/hwcomposer.cpp
index 8d8e1d0..875056d 100644
--- a/hwcomposer.cpp
+++ b/hwcomposer.cpp
@@ -201,165 +201,17 @@
   DrmHotplugHandler hotplug_handler;
 };
 
-static native_handle_t *dup_buffer_handle(buffer_handle_t handle) {
-  native_handle_t *new_handle =
-      native_handle_create(handle->numFds, handle->numInts);
-  if (new_handle == NULL)
-    return NULL;
-
-  const int *old_data = handle->data;
-  int *new_data = new_handle->data;
-  for (int i = 0; i < handle->numFds; i++) {
-    *new_data = dup(*old_data);
-    old_data++;
-    new_data++;
-  }
-  memcpy(new_data, old_data, sizeof(int) * handle->numInts);
-
-  return new_handle;
-}
-
-static void free_buffer_handle(native_handle_t *handle) {
-  int ret = native_handle_close(handle);
-  if (ret)
-    ALOGE("Failed to close native handle %d", ret);
-  ret = native_handle_delete(handle);
-  if (ret)
-    ALOGE("Failed to delete native handle %d", ret);
-}
-
-const hwc_drm_bo *DrmHwcBuffer::operator->() const {
-  if (importer_ == NULL) {
-    ALOGE("Access of non-existent BO");
-    exit(1);
-    return NULL;
-  }
-  return &bo_;
-}
-
-void DrmHwcBuffer::Clear() {
-  if (importer_ != NULL) {
-    importer_->ReleaseBuffer(&bo_);
-    importer_ = NULL;
-  }
-}
-
-int DrmHwcBuffer::ImportBuffer(buffer_handle_t handle, Importer *importer) {
-  hwc_drm_bo tmp_bo;
-
-  int ret = importer->ImportBuffer(handle, &tmp_bo);
-  if (ret)
-    return ret;
-
-  if (importer_ != NULL) {
-    importer_->ReleaseBuffer(&bo_);
+class DrmVsyncCallback : public VsyncCallback {
+ public:
+  DrmVsyncCallback(hwc_procs_t const *procs) : procs_(procs) {
   }
 
-  importer_ = importer;
-
-  bo_ = tmp_bo;
-
-  return 0;
-}
-
-int DrmHwcNativeHandle::CopyBufferHandle(buffer_handle_t handle,
-                                         const gralloc_module_t *gralloc) {
-  native_handle_t *handle_copy = dup_buffer_handle(handle);
-  if (handle_copy == NULL) {
-    ALOGE("Failed to duplicate handle");
-    return -ENOMEM;
+  void Callback(int display, int64_t timestamp) {
+    procs_->vsync(procs_, display, timestamp);
   }
-
-  int ret = gralloc->registerBuffer(gralloc, handle_copy);
-  if (ret) {
-    ALOGE("Failed to register buffer handle %d", ret);
-    free_buffer_handle(handle_copy);
-    return ret;
-  }
-
-  Clear();
-
-  gralloc_ = gralloc;
-  handle_ = handle_copy;
-
-  return 0;
-}
-
-DrmHwcNativeHandle::~DrmHwcNativeHandle() {
-  Clear();
-}
-
-void DrmHwcNativeHandle::Clear() {
-  if (gralloc_ != NULL && handle_ != NULL) {
-    gralloc_->unregisterBuffer(gralloc_, handle_);
-    free_buffer_handle(handle_);
-    gralloc_ = NULL;
-    handle_ = NULL;
-  }
-}
-
-int DrmHwcLayer::InitFromHwcLayer(hwc_layer_1_t *sf_layer, Importer *importer,
-                                  const gralloc_module_t *gralloc) {
-  sf_handle = sf_layer->handle;
-  alpha = sf_layer->planeAlpha;
-
-  source_crop = DrmHwcRect<float>(
-      sf_layer->sourceCropf.left, sf_layer->sourceCropf.top,
-      sf_layer->sourceCropf.right, sf_layer->sourceCropf.bottom);
-  display_frame = DrmHwcRect<int>(
-      sf_layer->displayFrame.left, sf_layer->displayFrame.top,
-      sf_layer->displayFrame.right, sf_layer->displayFrame.bottom);
-
-  transform = 0;
-  // 270* and 180* cannot be combined with flips. More specifically, they
-  // already contain both horizontal and vertical flips, so those fields are
-  // redundant in this case. 90* rotation can be combined with either horizontal
-  // flip or vertical flip, so treat it differently
-  if (sf_layer->transform == HWC_TRANSFORM_ROT_270) {
-    transform = DrmHwcTransform::kRotate270;
-  } else if (sf_layer->transform == HWC_TRANSFORM_ROT_180) {
-    transform = DrmHwcTransform::kRotate180;
-  } else {
-    if (sf_layer->transform & HWC_TRANSFORM_FLIP_H)
-      transform |= DrmHwcTransform::kFlipH;
-    if (sf_layer->transform & HWC_TRANSFORM_FLIP_V)
-      transform |= DrmHwcTransform::kFlipV;
-    if (sf_layer->transform & HWC_TRANSFORM_ROT_90)
-      transform |= DrmHwcTransform::kRotate90;
-  }
-
-  switch (sf_layer->blending) {
-    case HWC_BLENDING_NONE:
-      blending = DrmHwcBlending::kNone;
-      break;
-    case HWC_BLENDING_PREMULT:
-      blending = DrmHwcBlending::kPreMult;
-      break;
-    case HWC_BLENDING_COVERAGE:
-      blending = DrmHwcBlending::kCoverage;
-      break;
-    default:
-      ALOGE("Invalid blending in hwc_layer_1_t %d", sf_layer->blending);
-      return -EINVAL;
-  }
-
-  int ret = buffer.ImportBuffer(sf_layer->handle, importer);
-  if (ret)
-    return ret;
-
-  ret = handle.CopyBufferHandle(sf_layer->handle, gralloc);
-  if (ret)
-    return ret;
-
-  ret = gralloc->perform(gralloc, GRALLOC_MODULE_PERFORM_GET_USAGE,
-                         handle.get(), &gralloc_buffer_usage);
-  if (ret) {
-    ALOGE("Failed to get usage for buffer %p (%d)", handle.get(), ret);
-    return ret;
-  }
-
-  return 0;
-}
+ private:
+  hwc_procs_t const *procs_;
+};
 
 static void hwc_dump(struct hwc_composer_device_1 *dev, char *buff,
                      int buff_len) {
@@ -683,8 +535,10 @@
 
   ctx->procs = procs;
 
-  for (std::pair<const int, hwc_drm_display> &display_entry : ctx->displays)
-    display_entry.second.vsync_worker.SetProcs(procs);
+  for (std::pair<const int, hwc_drm_display> &display_entry : ctx->displays) {
+    auto callback = std::make_shared<DrmVsyncCallback>(procs);
+    display_entry.second.vsync_worker.RegisterCallback(std::move(callback));
+  }
 
   ctx->hotplug_handler.Init(&ctx->drm, procs);
   ctx->drm.event_listener()->RegisterHotplugHandler(&ctx->hotplug_handler);
diff --git a/hwcutils.cpp b/hwcutils.cpp
new file mode 100644
index 0000000..0091575
--- /dev/null
+++ b/hwcutils.cpp
@@ -0,0 +1,199 @@
+/*
+ * 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.
+ */
+
+#define ATRACE_TAG ATRACE_TAG_GRAPHICS
+#define LOG_TAG "hwc-drm-utils"
+
+#include "drmhwcomposer.h"
+#include "platform.h"
+
+#include <cutils/log.h>
+
+namespace android {
+
+const hwc_drm_bo *DrmHwcBuffer::operator->() const {
+  if (importer_ == NULL) {
+    ALOGE("Access of non-existent BO");
+    exit(1);
+    return NULL;
+  }
+  return &bo_;
+}
+
+void DrmHwcBuffer::Clear() {
+  if (importer_ != NULL) {
+    importer_->ReleaseBuffer(&bo_);
+    importer_ = NULL;
+  }
+}
+
+int DrmHwcBuffer::ImportBuffer(buffer_handle_t handle, Importer *importer) {
+  hwc_drm_bo tmp_bo;
+
+  int ret = importer->ImportBuffer(handle, &tmp_bo);
+  if (ret)
+    return ret;
+
+  if (importer_ != NULL) {
+    importer_->ReleaseBuffer(&bo_);
+  }
+
+  importer_ = importer;
+
+  bo_ = tmp_bo;
+
+  return 0;
+}
+
+static native_handle_t *dup_buffer_handle(buffer_handle_t handle) {
+  native_handle_t *new_handle =
+      native_handle_create(handle->numFds, handle->numInts);
+  if (new_handle == NULL)
+    return NULL;
+
+  const int *old_data = handle->data;
+  int *new_data = new_handle->data;
+  for (int i = 0; i < handle->numFds; i++) {
+    *new_data = dup(*old_data);
+    old_data++;
+    new_data++;
+  }
+  memcpy(new_data, old_data, sizeof(int) * handle->numInts);
+
+  return new_handle;
+}
+
+static void free_buffer_handle(native_handle_t *handle) {
+  int ret = native_handle_close(handle);
+  if (ret)
+    ALOGE("Failed to close native handle %d", ret);
+  ret = native_handle_delete(handle);
+  if (ret)
+    ALOGE("Failed to delete native handle %d", ret);
+}
+
+int DrmHwcNativeHandle::CopyBufferHandle(buffer_handle_t handle,
+                                         const gralloc_module_t *gralloc) {
+  native_handle_t *handle_copy = dup_buffer_handle(handle);
+  if (handle_copy == NULL) {
+    ALOGE("Failed to duplicate handle");
+    return -ENOMEM;
+  }
+
+  int ret = gralloc->registerBuffer(gralloc, handle_copy);
+  if (ret) {
+    ALOGE("Failed to register buffer handle %d", ret);
+    free_buffer_handle(handle_copy);
+    return ret;
+  }
+
+  Clear();
+
+  gralloc_ = gralloc;
+  handle_ = handle_copy;
+
+  return 0;
+}
+
+DrmHwcNativeHandle::~DrmHwcNativeHandle() {
+  Clear();
+}
+
+void DrmHwcNativeHandle::Clear() {
+  if (gralloc_ != NULL && handle_ != NULL) {
+    gralloc_->unregisterBuffer(gralloc_, handle_);
+    free_buffer_handle(handle_);
+    gralloc_ = NULL;
+    handle_ = NULL;
+  }
+}
+
+int DrmHwcLayer::InitFromHwcLayer(hwc_layer_1_t *sf_layer, Importer *importer,
+                                  const gralloc_module_t *gralloc) {
+  alpha = sf_layer->planeAlpha;
+
+  SetSourceCrop(sf_layer->sourceCropf);
+  SetDisplayFrame(sf_layer->displayFrame);
+  SetTransform(sf_layer->transform);
+
+  switch (sf_layer->blending) {
+    case HWC_BLENDING_NONE:
+      blending = DrmHwcBlending::kNone;
+      break;
+    case HWC_BLENDING_PREMULT:
+      blending = DrmHwcBlending::kPreMult;
+      break;
+    case HWC_BLENDING_COVERAGE:
+      blending = DrmHwcBlending::kCoverage;
+      break;
+    default:
+      ALOGE("Invalid blending in hwc_layer_1_t %d", sf_layer->blending);
+      return -EINVAL;
+  }
+
+  sf_handle = sf_layer->handle;
+
+  return ImportBuffer(importer, gralloc);
+}
+
+int DrmHwcLayer::ImportBuffer(Importer *importer,
+                              const gralloc_module_t *gralloc) {
+  int ret = buffer.ImportBuffer(sf_handle, importer);
+  if (ret)
+    return ret;
+
+  ret = handle.CopyBufferHandle(sf_handle, gralloc);
+  if (ret)
+    return ret;
+
+  ret = gralloc->perform(gralloc, GRALLOC_MODULE_PERFORM_GET_USAGE,
+                         handle.get(), &gralloc_buffer_usage);
+  if (ret) {
+    ALOGE("Failed to get usage for buffer %p (%d)", handle.get(), ret);
+    return ret;
+  }
+  return 0;
+}
+
+void DrmHwcLayer::SetSourceCrop(hwc_frect_t const &crop) {
+  source_crop = DrmHwcRect<float>(crop.left, crop.top, crop.right, crop.bottom);
+}
+
+void DrmHwcLayer::SetDisplayFrame(hwc_rect_t const &frame) {
+  display_frame =
+      DrmHwcRect<int>(frame.left, frame.top, frame.right, frame.bottom);
+}
+
+void DrmHwcLayer::SetTransform(int32_t sf_transform) {
+  transform = 0;
+  // 270* and 180* cannot be combined with flips. More specifically, they
+  // already contain both horizontal and vertical flips, so those fields are
+  // redundant in this case. 90* rotation can be combined with either horizontal
+  // flip or vertical flip, so treat it differently
+  if (sf_transform == HWC_TRANSFORM_ROT_270) {
+    transform = DrmHwcTransform::kRotate270;
+  } else if (sf_transform == HWC_TRANSFORM_ROT_180) {
+    transform = DrmHwcTransform::kRotate180;
+  } else {
+    if (sf_transform & HWC_TRANSFORM_FLIP_H)
+      transform |= DrmHwcTransform::kFlipH;
+    if (sf_transform & HWC_TRANSFORM_FLIP_V)
+      transform |= DrmHwcTransform::kFlipV;
+    if (sf_transform & HWC_TRANSFORM_ROT_90)
+      transform |= DrmHwcTransform::kRotate90;
+  }
+}
+}
diff --git a/platform.h b/platform.h
index 70e5e81..e417bf7 100644
--- a/platform.h
+++ b/platform.h
@@ -38,6 +38,10 @@
   // Creates a platform-specific importer instance
   static Importer *CreateInstance(DrmResources *drm);
 
+  // Imports EGLImage for glcompositor, since NV handles this in non-standard
+  // way, and fishing out the details is specific to the gralloc used.
+  virtual EGLImageKHR ImportImage(EGLDisplay egl_display, buffer_handle_t handle) = 0;
+
   // Imports the buffer referred to by handle into bo.
   //
   // Note: This can be called from a different thread than ReleaseBuffer. The
diff --git a/platformdrmgeneric.cpp b/platformdrmgeneric.cpp
index 90ba0e2..aa3d0fa 100644
--- a/platformdrmgeneric.cpp
+++ b/platformdrmgeneric.cpp
@@ -27,6 +27,7 @@
 #include <cutils/log.h>
 #include <gralloc_drm_handle.h>
 #include <hardware/gralloc.h>
+#include <EGL/eglext.h>
 
 namespace android {
 
@@ -83,6 +84,22 @@
   }
 }
 
+EGLImageKHR DrmGenericImporter::ImportImage(EGLDisplay egl_display, buffer_handle_t handle) {
+  gralloc_drm_handle_t *gr_handle = gralloc_drm_handle(handle);
+  if (!gr_handle)
+    return NULL;
+  EGLint attr[] = {
+    EGL_WIDTH, gr_handle->width,
+    EGL_HEIGHT, gr_handle->height,
+    EGL_LINUX_DRM_FOURCC_EXT, (EGLint)ConvertHalFormatToDrm(gr_handle->format),
+    EGL_DMA_BUF_PLANE0_FD_EXT, gr_handle->prime_fd,
+    EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
+    EGL_DMA_BUF_PLANE0_PITCH_EXT, gr_handle->stride,
+    EGL_NONE,
+  };
+  return eglCreateImageKHR(egl_display, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, NULL, attr);
+}
+
 int DrmGenericImporter::ImportBuffer(buffer_handle_t handle, hwc_drm_bo_t *bo) {
   gralloc_drm_handle_t *gr_handle = gralloc_drm_handle(handle);
   if (!gr_handle)
diff --git a/platformdrmgeneric.h b/platformdrmgeneric.h
index 3400876..8376580 100644
--- a/platformdrmgeneric.h
+++ b/platformdrmgeneric.h
@@ -31,6 +31,7 @@
 
   int Init();
 
+  EGLImageKHR ImportImage(EGLDisplay egl_display, buffer_handle_t handle) override;
   int ImportBuffer(buffer_handle_t handle, hwc_drm_bo_t *bo) override;
   int ReleaseBuffer(hwc_drm_bo_t *bo) override;
 
diff --git a/platformnv.cpp b/platformnv.cpp
index e05d1bb..e7b6be3 100644
--- a/platformnv.cpp
+++ b/platformnv.cpp
@@ -29,6 +29,10 @@
 #include <cutils/log.h>
 #include <hardware/gralloc.h>
 
+#ifndef EGL_NATIVE_HANDLE_ANDROID_NVX
+#define EGL_NATIVE_HANDLE_ANDROID_NVX 0x322A
+#endif
+
 namespace android {
 
 #ifdef USE_NVIDIA_IMPORTER
@@ -69,6 +73,13 @@
   return 0;
 }
 
+
+EGLImageKHR NvImporter::ImportImage(EGLDisplay egl_display, buffer_handle_t handle) {
+  return eglCreateImageKHR(
+      egl_display, EGL_NO_CONTEXT, EGL_NATIVE_HANDLE_ANDROID_NVX,
+      (EGLClientBuffer)handle, NULL /* no attribs */);
+}
+
 int NvImporter::ImportBuffer(buffer_handle_t handle, hwc_drm_bo_t *bo) {
   memset(bo, 0, sizeof(hwc_drm_bo_t));
   NvBuffer_t *buf = GrallocGetNvBuffer(handle);
diff --git a/platformnv.h b/platformnv.h
index e379ea9..7e2784f 100644
--- a/platformnv.h
+++ b/platformnv.h
@@ -34,6 +34,7 @@
 
   int Init();
 
+  EGLImageKHR ImportImage(EGLDisplay egl_display, buffer_handle_t handle) override;
   int ImportBuffer(buffer_handle_t handle, hwc_drm_bo_t *bo) override;
   int ReleaseBuffer(hwc_drm_bo_t *bo) override;
 
diff --git a/vsyncworker.cpp b/vsyncworker.cpp
index ee140cb..2177521 100644
--- a/vsyncworker.cpp
+++ b/vsyncworker.cpp
@@ -34,7 +34,6 @@
 VSyncWorker::VSyncWorker()
     : Worker("vsync", HAL_PRIORITY_URGENT_DISPLAY),
       drm_(NULL),
-      procs_(NULL),
       display_(-1),
       last_timestamp_(-1) {
 }
@@ -49,9 +48,9 @@
   return InitWorker();
 }
 
-void VSyncWorker::SetProcs(hwc_procs_t const *procs) {
+void VSyncWorker::RegisterCallback(std::shared_ptr<VsyncCallback> callback) {
   Lock();
-  procs_ = procs;
+  callback_ = callback;
   Unlock();
 }
 
@@ -126,7 +125,8 @@
 
   bool enabled = enabled_;
   int display = display_;
-  hwc_procs_t const *procs = procs_;
+  std::shared_ptr<VsyncCallback> callback(callback_);
+
   Unlock();
 
   if (!enabled)
@@ -159,16 +159,16 @@
   }
 
   /*
-   * There's a race here where a change in procs_ will not take effect until
+   * There's a race here where a change in callback_ will not take effect until
    * the next subsequent requested vsync. This is unavoidable since we can't
    * call the vsync hook while holding the thread lock.
    *
-   * We could shorten the race window by caching procs_ right before calling
-   * the hook. However, in practice, procs_ is only updated once, so it's not
+   * We could shorten the race window by caching callback_ right before calling
+   * the hook. However, in practice, callback_ is only updated once, so it's not
    * worth the overhead.
    */
-  if (procs && procs->vsync)
-    procs->vsync(procs, display, timestamp);
+  if (callback)
+    callback->Callback(display, timestamp);
   last_timestamp_ = timestamp;
 }
 }
diff --git a/vsyncworker.h b/vsyncworker.h
index 3e1f814..787152e 100644
--- a/vsyncworker.h
+++ b/vsyncworker.h
@@ -28,13 +28,20 @@
 
 namespace android {
 
+class VsyncCallback {
+ public:
+  virtual ~VsyncCallback() {
+  }
+  virtual void Callback(int display, int64_t timestamp) = 0;
+};
+
 class VSyncWorker : public Worker {
  public:
   VSyncWorker();
   ~VSyncWorker() override;
 
   int Init(DrmResources *drm, int display);
-  void SetProcs(hwc_procs_t const *procs);
+  void RegisterCallback(std::shared_ptr<VsyncCallback> callback);
 
   void VSyncControl(bool enabled);
 
@@ -46,7 +53,11 @@
   int SyntheticWaitVBlank(int64_t *timestamp);
 
   DrmResources *drm_;
-  hwc_procs_t const *procs_;
+
+  // shared_ptr since we need to use this outside of the thread lock (to
+  // actually call the hook) and we don't want the memory freed until we're
+  // done
+  std::shared_ptr<VsyncCallback> callback_ = NULL;
 
   int display_;
   bool enabled_;