diff --git a/DrmHwcTwo.cpp b/DrmHwcTwo.cpp
index 76fecf9..5bbb48a 100644
--- a/DrmHwcTwo.cpp
+++ b/DrmHwcTwo.cpp
@@ -14,27 +14,12 @@
  * limitations under the License.
  */
 
-#define ATRACE_TAG ATRACE_TAG_GRAPHICS
 #define LOG_TAG "hwc-drm-two"
 
 #include "DrmHwcTwo.h"
 
-#include <fcntl.h>
-#include <hardware/hardware.h>
-#include <hardware/hwcomposer2.h>
-#include <sync/sync.h>
-#include <unistd.h>
-
-#include <cinttypes>
-#include <iostream>
-#include <sstream>
-#include <string>
-
-#include "backend/BackendManager.h"
-#include "bufferinfo/BufferInfoGetter.h"
-#include "compositor/DrmDisplayComposition.h"
+#include "backend/Backend.h"
 #include "utils/log.h"
-#include "utils/properties.h"
 
 namespace android {
 
@@ -100,60 +85,6 @@
   return HWC2::Error::Unsupported;
 }
 
-std::string DrmHwcTwo::HwcDisplay::DumpDelta(
-    DrmHwcTwo::HwcDisplay::Stats delta) {
-  if (delta.total_pixops_ == 0)
-    return "No stats yet";
-  double ratio = 1.0 - double(delta.gpu_pixops_) / double(delta.total_pixops_);
-
-  std::stringstream ss;
-  ss << " Total frames count: " << delta.total_frames_ << "\n"
-     << " Failed to test commit frames: " << delta.failed_kms_validate_ << "\n"
-     << " Failed to commit frames: " << delta.failed_kms_present_ << "\n"
-     << ((delta.failed_kms_present_ > 0)
-             ? " !!! Internal failure, FIX it please\n"
-             : "")
-     << " Flattened frames: " << delta.frames_flattened_ << "\n"
-     << " Pixel operations (free units)"
-     << " : [TOTAL: " << delta.total_pixops_ << " / GPU: " << delta.gpu_pixops_
-     << "]\n"
-     << " Composition efficiency: " << ratio;
-
-  return ss.str();
-}
-
-std::string DrmHwcTwo::HwcDisplay::Dump() {
-  std::string flattening_state_str;
-  switch (flattenning_state_) {
-    case ClientFlattenningState::Disabled:
-      flattening_state_str = "Disabled";
-      break;
-    case ClientFlattenningState::NotRequired:
-      flattening_state_str = "Not needed";
-      break;
-    case ClientFlattenningState::Flattened:
-      flattening_state_str = "Active";
-      break;
-    case ClientFlattenningState::ClientRefreshRequested:
-      flattening_state_str = "Refresh requested";
-      break;
-    default:
-      flattening_state_str = std::to_string(flattenning_state_) +
-                             " VSync remains";
-  }
-
-  std::stringstream ss;
-  ss << "- Display on: " << connector_->name() << "\n"
-     << "  Flattening state: " << flattening_state_str << "\n"
-     << "Statistics since system boot:\n"
-     << DumpDelta(total_stats_) << "\n\n"
-     << "Statistics since last dumpsys request:\n"
-     << DumpDelta(total_stats_.minus(prev_stats_)) << "\n\n";
-
-  memcpy(&prev_stats_, &total_stats_, sizeof(Stats));
-  return ss.str();
-}
-
 void DrmHwcTwo::Dump(uint32_t *outSize, char *outBuffer) {
   if (outBuffer != nullptr) {
     auto copied_bytes = mDumpString.copy(outBuffer, *outSize);
@@ -165,7 +96,7 @@
 
   output << "-- drm_hwcomposer --\n\n";
 
-  for (std::pair<const hwc2_display_t, DrmHwcTwo::HwcDisplay> &dp : displays_)
+  for (std::pair<const hwc2_display_t, HwcDisplay> &dp : displays_)
     output << dp.second.Dump();
 
   mDumpString = output.str();
@@ -211,880 +142,6 @@
   return HWC2::Error::None;
 }
 
-DrmHwcTwo::HwcDisplay::HwcDisplay(ResourceManager *resource_manager,
-                                  DrmDevice *drm, hwc2_display_t handle,
-                                  HWC2::DisplayType type, DrmHwcTwo *hwc2)
-    : hwc2_(hwc2),
-      resource_manager_(resource_manager),
-      drm_(drm),
-      handle_(handle),
-      type_(type),
-      color_transform_hint_(HAL_COLOR_TRANSFORM_IDENTITY) {
-  // clang-format off
-  color_transform_matrix_ = {1.0, 0.0, 0.0, 0.0,
-                             0.0, 1.0, 0.0, 0.0,
-                             0.0, 0.0, 1.0, 0.0,
-                             0.0, 0.0, 0.0, 1.0};
-  // clang-format on
-}
-
-void DrmHwcTwo::HwcDisplay::ClearDisplay() {
-  AtomicCommitArgs a_args = {.clear_active_composition = true};
-  compositor_.ExecuteAtomicCommit(a_args);
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::Init(std::vector<DrmPlane *> *planes) {
-  int display = static_cast<int>(handle_);
-  int ret = compositor_.Init(resource_manager_, 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("vendor.hwc.drm.use_overlay_planes", use_overlay_planes_prop,
-               "1");
-  bool use_overlay_planes = strtol(use_overlay_planes_prop, nullptr, 10);
-  for (auto &plane : *planes) {
-    if (plane->GetType() == DRM_PLANE_TYPE_PRIMARY)
-      primary_planes_.push_back(plane);
-    else if (use_overlay_planes && (plane)->GetType() == 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;
-  }
-
-  ret = vsync_worker_.Init(drm_, display, [this](int64_t timestamp) {
-    const std::lock_guard<std::mutex> lock(hwc2_->callback_lock_);
-    /* vsync callback */
-#if PLATFORM_SDK_VERSION > 29
-    if (hwc2_->vsync_2_4_callback_.first != nullptr &&
-        hwc2_->vsync_2_4_callback_.second != nullptr) {
-      hwc2_vsync_period_t period_ns{};
-      GetDisplayVsyncPeriod(&period_ns);
-      hwc2_->vsync_2_4_callback_.first(hwc2_->vsync_2_4_callback_.second,
-                                       handle_, timestamp, period_ns);
-    } else
-#endif
-        if (hwc2_->vsync_callback_.first != nullptr &&
-            hwc2_->vsync_callback_.second != nullptr) {
-      hwc2_->vsync_callback_.first(hwc2_->vsync_callback_.second, handle_,
-                                   timestamp);
-    }
-  });
-  if (ret) {
-    ALOGE("Failed to create event worker for d=%d %d\n", display, ret);
-    return HWC2::Error::BadDisplay;
-  }
-
-  ret = flattening_vsync_worker_.Init(drm_, display, [this](int64_t /*timestamp*/) {
-    const std::lock_guard<std::mutex> lock(hwc2_->callback_lock_);
-    /* Frontend flattening */
-    if (flattenning_state_ > ClientFlattenningState::ClientRefreshRequested &&
-        --flattenning_state_ ==
-            ClientFlattenningState::ClientRefreshRequested &&
-        hwc2_->refresh_callback_.first != nullptr &&
-        hwc2_->refresh_callback_.second != nullptr) {
-      hwc2_->refresh_callback_.first(hwc2_->refresh_callback_.second, handle_);
-      flattening_vsync_worker_.VSyncControl(false);
-    }
-  });
-  if (ret) {
-    ALOGE("Failed to create event worker for d=%d %d\n", display, ret);
-    return HWC2::Error::BadDisplay;
-  }
-
-  ret = BackendManager::GetInstance().SetBackendForDisplay(this);
-  if (ret) {
-    ALOGE("Failed to set backend for d=%d %d\n", display, ret);
-    return HWC2::Error::BadDisplay;
-  }
-
-  client_layer_.SetLayerBlendMode(HWC2_BLEND_MODE_PREMULTIPLIED);
-
-  return ChosePreferredConfig();
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::ChosePreferredConfig() {
-  // Fetch the number of modes from the display
-  uint32_t num_configs = 0;
-  HWC2::Error err = GetDisplayConfigs(&num_configs, nullptr);
-  if (err != HWC2::Error::None || !num_configs)
-    return HWC2::Error::BadDisplay;
-
-  return SetActiveConfig(preferred_config_id_);
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::AcceptDisplayChanges() {
-  for (std::pair<const hwc2_layer_t, HwcLayer> &l : layers_)
-    l.second.AcceptTypeChange();
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::CreateLayer(hwc2_layer_t *layer) {
-  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) {
-  if (!get_layer(layer))
-    return HWC2::Error::BadLayer;
-
-  layers_.erase(layer);
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::GetActiveConfig(
-    hwc2_config_t *config) const {
-  if (hwc_configs_.count(active_config_id_) == 0)
-    return HWC2::Error::BadConfig;
-
-  *config = active_config_id_;
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::GetChangedCompositionTypes(
-    uint32_t *num_elements, hwc2_layer_t *layers, int32_t *types) {
-  uint32_t num_changes = 0;
-  for (std::pair<const hwc2_layer_t, HwcLayer> &l : layers_) {
-    if (l.second.IsTypeChanged()) {
-      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.GetValidatedType());
-      ++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) {
-  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)
-    return HWC2::Error::Unsupported;
-
-  // TODO(nobody): 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) {
-  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) {
-  int conf = static_cast<int>(config);
-
-  if (hwc_configs_.count(conf) == 0) {
-    ALOGE("Could not find active mode for %d", conf);
-    return HWC2::Error::BadConfig;
-  }
-
-  auto &hwc_config = hwc_configs_[conf];
-
-  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 = static_cast<int>(hwc_config.mode.h_display());
-      break;
-    case HWC2::Attribute::Height:
-      *value = static_cast<int>(hwc_config.mode.v_display());
-      break;
-    case HWC2::Attribute::VsyncPeriod:
-      // in nanoseconds
-      *value = static_cast<int>(1E9 / hwc_config.mode.v_refresh());
-      break;
-    case HWC2::Attribute::DpiX:
-      // Dots per 1000 inches
-      *value = mm_width ? static_cast<int>(hwc_config.mode.h_display() *
-                                           kUmPerInch / mm_width)
-                        : -1;
-      break;
-    case HWC2::Attribute::DpiY:
-      // Dots per 1000 inches
-      *value = mm_height ? static_cast<int>(hwc_config.mode.v_display() *
-                                            kUmPerInch / mm_height)
-                         : -1;
-      break;
-#if PLATFORM_SDK_VERSION > 29
-    case HWC2::Attribute::ConfigGroup:
-      /* Dispite ConfigGroup is a part of HWC2.4 API, framework
-       * able to request it even if service @2.1 is used */
-      *value = hwc_config.group_id;
-      break;
-#endif
-    default:
-      *value = -1;
-      return HWC2::Error::BadConfig;
-  }
-  return HWC2::Error::None;
-}
-
-// NOLINTNEXTLINE (readability-function-cognitive-complexity): Fixme
-HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayConfigs(uint32_t *num_configs,
-                                                     hwc2_config_t *configs) {
-  // 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;
-    }
-
-    hwc_configs_.clear();
-    preferred_config_id_ = 0;
-    int preferred_config_group_id_ = 0;
-
-    if (connector_->modes().empty()) {
-      ALOGE("No modes reported by KMS");
-      return HWC2::Error::BadDisplay;
-    }
-
-    int last_config_id = 1;
-    int last_group_id = 1;
-
-    /* Group modes */
-    for (const auto &mode : connector_->modes()) {
-      /* Find group for the new mode or create new group */
-      int group_found = 0;
-      for (auto &hwc_config : hwc_configs_) {
-        if (mode.h_display() == hwc_config.second.mode.h_display() &&
-            mode.v_display() == hwc_config.second.mode.v_display()) {
-          group_found = hwc_config.second.group_id;
-        }
-      }
-      if (group_found == 0) {
-        group_found = last_group_id++;
-      }
-
-      bool disabled = false;
-      if (mode.flags() & DRM_MODE_FLAG_3D_MASK) {
-        ALOGI("Disabling display mode %s (Modes with 3D flag aren't supported)",
-              mode.name().c_str());
-        disabled = true;
-      }
-
-      /* Add config */
-      hwc_configs_[last_config_id] = {
-          .id = last_config_id,
-          .group_id = group_found,
-          .mode = mode,
-          .disabled = disabled,
-      };
-
-      /* Chwck if the mode is preferred */
-      if ((mode.type() & DRM_MODE_TYPE_PREFERRED) != 0 &&
-          preferred_config_id_ == 0) {
-        preferred_config_id_ = last_config_id;
-        preferred_config_group_id_ = group_found;
-      }
-
-      last_config_id++;
-    }
-
-    /* We must have preferred mode. Set first mode as preferred
-     * in case KMS haven't reported anything. */
-    if (preferred_config_id_ == 0) {
-      preferred_config_id_ = 1;
-      preferred_config_group_id_ = 1;
-    }
-
-    for (int group = 1; group < last_group_id; group++) {
-      bool has_interlaced = false;
-      bool has_progressive = false;
-      for (auto &hwc_config : hwc_configs_) {
-        if (hwc_config.second.group_id != group || hwc_config.second.disabled) {
-          continue;
-        }
-
-        if (hwc_config.second.IsInterlaced()) {
-          has_interlaced = true;
-        } else {
-          has_progressive = true;
-        }
-      }
-
-      bool has_both = has_interlaced && has_progressive;
-      if (!has_both) {
-        continue;
-      }
-
-      bool group_contains_preferred_interlaced = false;
-      if (group == preferred_config_group_id_ &&
-          hwc_configs_[preferred_config_id_].IsInterlaced()) {
-        group_contains_preferred_interlaced = true;
-      }
-
-      for (auto &hwc_config : hwc_configs_) {
-        if (hwc_config.second.group_id != group || hwc_config.second.disabled) {
-          continue;
-        }
-
-        bool disable = group_contains_preferred_interlaced
-                           ? !hwc_config.second.IsInterlaced()
-                           : hwc_config.second.IsInterlaced();
-
-        if (disable) {
-          ALOGI(
-              "Group %i: Disabling display mode %s (This group should consist "
-              "of %s modes)",
-              group, hwc_config.second.mode.name().c_str(),
-              group_contains_preferred_interlaced ? "interlaced"
-                                                  : "progressive");
-
-          hwc_config.second.disabled = true;
-        }
-      }
-    }
-
-    /* Group should not contain 2 modes with FPS delta less than ~1HZ
-     * otherwise android.graphics.cts.SetFrameRateTest CTS will fail
-     */
-    for (int m1 = 1; m1 < last_config_id; m1++) {
-      for (int m2 = 1; m2 < last_config_id; m2++) {
-        if (m1 != m2 &&
-            hwc_configs_[m1].group_id == hwc_configs_[m2].group_id &&
-            !hwc_configs_[m1].disabled && !hwc_configs_[m2].disabled &&
-            fabsf(hwc_configs_[m1].mode.v_refresh() -
-                  hwc_configs_[m2].mode.v_refresh()) < 1.0) {
-          ALOGI(
-              "Group %i: Disabling display mode %s (Refresh rate value is "
-              "too close to existing mode %s)",
-              hwc_configs_[m2].group_id, hwc_configs_[m2].mode.name().c_str(),
-              hwc_configs_[m1].mode.name().c_str());
-
-          hwc_configs_[m2].disabled = true;
-        }
-      }
-    }
-  }
-
-  uint32_t idx = 0;
-  for (auto &hwc_config : hwc_configs_) {
-    if (hwc_config.second.disabled) {
-      continue;
-    }
-
-    if (configs != nullptr) {
-      if (idx >= *num_configs) {
-        break;
-      }
-      configs[idx] = hwc_config.second.id;
-    }
-
-    idx++;
-  }
-  *num_configs = idx;
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayName(uint32_t *size, char *name) {
-  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*/) {
-  // TODO(nobody): I think virtual display should request
-  //      HWC2_DISPLAY_REQUEST_WRITE_CLIENT_TARGET_TO_OUTPUT here
-  *num_elements = 0;
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayType(int32_t *type) {
-  *type = static_cast<int32_t>(type_);
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::GetDozeSupport(int32_t *support) {
-  *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*/) {
-  *num_types = 0;
-  return HWC2::Error::None;
-}
-
-/* Find API details at:
- * https://cs.android.com/android/platform/superproject/+/android-11.0.0_r3:hardware/libhardware/include/hardware/hwcomposer2.h;l=1767
- */
-HWC2::Error DrmHwcTwo::HwcDisplay::GetReleaseFences(uint32_t *num_elements,
-                                                    hwc2_layer_t *layers,
-                                                    int32_t *fences) {
-  uint32_t num_layers = 0;
-
-  for (std::pair<const hwc2_layer_t, HwcLayer> &l : layers_) {
-    ++num_layers;
-    if (layers == nullptr || fences == nullptr)
-      continue;
-
-    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.GetReleaseFence().Release();
-  }
-  *num_elements = num_layers;
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::CreateComposition(AtomicCommitArgs &a_args) {
-  // order the layers by z-order
-  bool use_client_layer = false;
-  uint32_t client_z_order = UINT32_MAX;
-  std::map<uint32_t, HwcLayer *> z_map;
-  for (std::pair<const hwc2_layer_t, HwcLayer> &l : layers_) {
-    switch (l.second.GetValidatedType()) {
-      case HWC2::Composition::Device:
-        z_map.emplace(std::make_pair(l.second.GetZOrder(), &l.second));
-        break;
-      case HWC2::Composition::Client:
-        // Place it at the z_order of the lowest client layer
-        use_client_layer = true;
-        client_z_order = std::min(client_z_order, l.second.GetZOrder());
-        break;
-      default:
-        continue;
-    }
-  }
-  if (use_client_layer)
-    z_map.emplace(std::make_pair(client_z_order, &client_layer_));
-
-  if (z_map.empty())
-    return HWC2::Error::BadLayer;
-
-  std::vector<DrmHwcLayer> composition_layers;
-
-  // now that they're ordered by z, add them to the composition
-  for (std::pair<const uint32_t, HwcLayer *> &l : z_map) {
-    DrmHwcLayer layer;
-    l.second->PopulateDrmLayer(&layer);
-    int ret = layer.ImportBuffer(drm_);
-    if (ret) {
-      ALOGE("Failed to import layer, ret=%d", ret);
-      return HWC2::Error::NoResources;
-    }
-    composition_layers.emplace_back(std::move(layer));
-  }
-
-  auto composition = std::make_shared<DrmDisplayComposition>(crtc_);
-
-  // TODO(nobody): Don't always assume geometry changed
-  int ret = composition->SetLayers(composition_layers.data(),
-                                   composition_layers.size());
-  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(&primary_planes, &overlay_planes);
-  if (ret) {
-    ALOGV("Failed to plan the composition ret=%d", ret);
-    return HWC2::Error::BadConfig;
-  }
-
-  a_args.composition = composition;
-  if (staged_mode) {
-    a_args.display_mode = *staged_mode;
-  }
-  ret = compositor_.ExecuteAtomicCommit(a_args);
-
-  if (ret) {
-    if (!a_args.test_only)
-      ALOGE("Failed to apply the frame composition ret=%d", ret);
-    return HWC2::Error::BadParameter;
-  }
-
-  if (!a_args.test_only) {
-    staged_mode.reset();
-  }
-
-  return HWC2::Error::None;
-}
-
-/* Find API details at:
- * https://cs.android.com/android/platform/superproject/+/android-11.0.0_r3:hardware/libhardware/include/hardware/hwcomposer2.h;l=1805
- */
-HWC2::Error DrmHwcTwo::HwcDisplay::PresentDisplay(int32_t *present_fence) {
-  HWC2::Error ret;
-
-  ++total_stats_.total_frames_;
-
-  AtomicCommitArgs a_args{};
-  ret = CreateComposition(a_args);
-
-  if (ret != HWC2::Error::None)
-    ++total_stats_.failed_kms_present_;
-
-  if (ret == HWC2::Error::BadLayer) {
-    // Can we really have no client or device layers?
-    *present_fence = -1;
-    return HWC2::Error::None;
-  }
-  if (ret != HWC2::Error::None)
-    return ret;
-
-  *present_fence = a_args.out_fence.Release();
-
-  ++frame_no_;
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::SetActiveConfig(hwc2_config_t config) {
-  int conf = static_cast<int>(config);
-
-  if (hwc_configs_.count(conf) == 0) {
-    ALOGE("Could not find active mode for %d", conf);
-    return HWC2::Error::BadConfig;
-  }
-
-  auto &mode = hwc_configs_[conf].mode;
-
-  staged_mode = mode;
-
-  active_config_id_ = conf;
-
-  // 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);
-
-  return HWC2::Error::None;
-}
-
-/* Find API details at:
- * https://cs.android.com/android/platform/superproject/+/android-11.0.0_r3:hardware/libhardware/include/hardware/hwcomposer2.h;l=1861
- */
-HWC2::Error DrmHwcTwo::HwcDisplay::SetClientTarget(buffer_handle_t target,
-                                                   int32_t acquire_fence,
-                                                   int32_t dataspace,
-                                                   hwc_region_t /*damage*/) {
-  client_layer_.SetLayerBuffer(target, acquire_fence);
-  client_layer_.SetLayerDataspace(dataspace);
-
-  /*
-   * target can be nullptr, this does mean the Composer Service is calling
-   * cleanDisplayResources() on after receiving HOTPLUG event. See more at:
-   * https://cs.android.com/android/platform/superproject/+/master:hardware/interfaces/graphics/composer/2.1/utils/hal/include/composer-hal/2.1/ComposerClient.h;l=350;drc=944b68180b008456ed2eb4d4d329e33b19bd5166
-   */
-  if (target == nullptr) {
-    return HWC2::Error::None;
-  }
-
-  /* TODO: Do not update source_crop every call.
-   * It makes sense to do it once after every hotplug event. */
-  HwcDrmBo bo{};
-  BufferInfoGetter::GetInstance()->ConvertBoInfo(target, &bo);
-
-  hwc_frect_t source_crop = {.left = 0.0F,
-                             .top = 0.0F,
-                             .right = static_cast<float>(bo.width),
-                             .bottom = static_cast<float>(bo.height)};
-  client_layer_.SetLayerSourceCrop(source_crop);
-
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::SetColorMode(int32_t mode) {
-  if (mode < HAL_COLOR_MODE_NATIVE || mode > HAL_COLOR_MODE_BT2100_HLG)
-    return HWC2::Error::BadParameter;
-
-  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) {
-  if (hint < HAL_COLOR_TRANSFORM_IDENTITY ||
-      hint > HAL_COLOR_TRANSFORM_CORRECT_TRITANOPIA)
-    return HWC2::Error::BadParameter;
-
-  if (!matrix && hint == HAL_COLOR_TRANSFORM_ARBITRARY_MATRIX)
-    return HWC2::Error::BadParameter;
-
-  color_transform_hint_ = static_cast<android_color_transform_t>(hint);
-  if (color_transform_hint_ == HAL_COLOR_TRANSFORM_ARBITRARY_MATRIX)
-    std::copy(matrix, matrix + MATRIX_SIZE, color_transform_matrix_.begin());
-
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::SetOutputBuffer(buffer_handle_t /*buffer*/,
-                                                   int32_t /*release_fence*/) {
-  // TODO(nobody): Need virtual display support
-  return HWC2::Error::Unsupported;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::SetPowerMode(int32_t mode_in) {
-  auto mode = static_cast<HWC2::PowerMode>(mode_in);
-  AtomicCommitArgs a_args{};
-
-  switch (mode) {
-    case HWC2::PowerMode::Off:
-      a_args.active = false;
-      break;
-    case HWC2::PowerMode::On:
-      /*
-       * Setting the display to active before we have a composition
-       * can break some drivers, so skip setting a_args.active to
-       * true, as the next composition frame will implicitly activate
-       * the display
-       */
-      return HWC2::Error::None;
-      break;
-    case HWC2::PowerMode::Doze:
-    case HWC2::PowerMode::DozeSuspend:
-      return HWC2::Error::Unsupported;
-    default:
-      ALOGI("Power mode %d is unsupported\n", mode);
-      return HWC2::Error::BadParameter;
-  };
-
-  int err = compositor_.ExecuteAtomicCommit(a_args);
-  if (err) {
-    ALOGE("Failed to apply the dpms composition err=%d", err);
-    return HWC2::Error::BadParameter;
-  }
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::SetVsyncEnabled(int32_t enabled) {
-  vsync_worker_.VSyncControl(HWC2_VSYNC_ENABLE == enabled);
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::ValidateDisplay(uint32_t *num_types,
-                                                   uint32_t *num_requests) {
-  return backend_->ValidateDisplay(this, num_types, num_requests);
-}
-
-std::vector<HwcLayer *> DrmHwcTwo::HwcDisplay::GetOrderLayersByZPos() {
-  std::vector<HwcLayer *> ordered_layers;
-  ordered_layers.reserve(layers_.size());
-
-  for (auto &[handle, layer] : layers_) {
-    ordered_layers.emplace_back(&layer);
-  }
-
-  std::sort(std::begin(ordered_layers), std::end(ordered_layers),
-            [](const HwcLayer *lhs, const HwcLayer *rhs) {
-              return lhs->GetZOrder() < rhs->GetZOrder();
-            });
-
-  return ordered_layers;
-}
-
-#if PLATFORM_SDK_VERSION > 29
-HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayConnectionType(uint32_t *outType) {
-  if (connector_->internal())
-    *outType = static_cast<uint32_t>(HWC2::DisplayConnectionType::Internal);
-  else if (connector_->external())
-    *outType = static_cast<uint32_t>(HWC2::DisplayConnectionType::External);
-  else
-    return HWC2::Error::BadConfig;
-
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayVsyncPeriod(
-    hwc2_vsync_period_t *outVsyncPeriod /* ns */) {
-  return GetDisplayAttribute(active_config_id_, HWC2_ATTRIBUTE_VSYNC_PERIOD,
-                             (int32_t *)(outVsyncPeriod));
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::SetActiveConfigWithConstraints(
-    hwc2_config_t /*config*/,
-    hwc_vsync_period_change_constraints_t *vsyncPeriodChangeConstraints,
-    hwc_vsync_period_change_timeline_t *outTimeline) {
-  if (vsyncPeriodChangeConstraints == nullptr || outTimeline == nullptr) {
-    return HWC2::Error::BadParameter;
-  }
-
-  return HWC2::Error::BadConfig;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::SetAutoLowLatencyMode(bool /*on*/) {
-  return HWC2::Error::Unsupported;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::GetSupportedContentTypes(
-    uint32_t *outNumSupportedContentTypes,
-    const uint32_t *outSupportedContentTypes) {
-  if (outSupportedContentTypes == nullptr)
-    *outNumSupportedContentTypes = 0;
-
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::SetContentType(int32_t contentType) {
-  if (contentType != HWC2_CONTENT_TYPE_NONE)
-    return HWC2::Error::Unsupported;
-
-  /* TODO: Map to the DRM Connector property:
-   * https://elixir.bootlin.com/linux/v5.4-rc5/source/drivers/gpu/drm/drm_connector.c#L809
-   */
-
-  return HWC2::Error::None;
-}
-#endif
-
-#if PLATFORM_SDK_VERSION > 28
-HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayIdentificationData(
-    uint8_t *outPort, uint32_t *outDataSize, uint8_t *outData) {
-  auto blob = connector_->GetEdidBlob();
-
-  if (!blob) {
-    ALOGE("Failed to get edid property value.");
-    return HWC2::Error::Unsupported;
-  }
-
-  if (outData) {
-    *outDataSize = std::min(*outDataSize, blob->length);
-    memcpy(outData, blob->data, *outDataSize);
-  } else {
-    *outDataSize = blob->length;
-  }
-  *outPort = connector_->id();
-
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayCapabilities(
-    uint32_t *outNumCapabilities, uint32_t * /*outCapabilities*/) {
-  if (outNumCapabilities == nullptr) {
-    return HWC2::Error::BadParameter;
-  }
-
-  *outNumCapabilities = 0;
-
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayBrightnessSupport(
-    bool *supported) {
-  *supported = false;
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::SetDisplayBrightness(
-    float /* brightness */) {
-  return HWC2::Error::Unsupported;
-}
-
-#endif /* PLATFORM_SDK_VERSION > 28 */
-
-#if PLATFORM_SDK_VERSION > 27
-
-HWC2::Error DrmHwcTwo::HwcDisplay::GetRenderIntents(
-    int32_t mode, uint32_t *outNumIntents,
-    int32_t * /*android_render_intent_v1_1_t*/ outIntents) {
-  if (mode != HAL_COLOR_MODE_NATIVE) {
-    return HWC2::Error::BadParameter;
-  }
-
-  if (outIntents == nullptr) {
-    *outNumIntents = 1;
-    return HWC2::Error::None;
-  }
-  *outNumIntents = 1;
-  outIntents[0] = HAL_RENDER_INTENT_COLORIMETRIC;
-  return HWC2::Error::None;
-}
-
-HWC2::Error DrmHwcTwo::HwcDisplay::SetColorModeWithIntent(int32_t mode,
-                                                          int32_t intent) {
-  if (intent < HAL_RENDER_INTENT_COLORIMETRIC ||
-      intent > HAL_RENDER_INTENT_TONE_MAP_ENHANCE)
-    return HWC2::Error::BadParameter;
-
-  if (mode < HAL_COLOR_MODE_NATIVE || mode > HAL_COLOR_MODE_BT2100_HLG)
-    return HWC2::Error::BadParameter;
-
-  if (mode != HAL_COLOR_MODE_NATIVE)
-    return HWC2::Error::Unsupported;
-
-  if (intent != HAL_RENDER_INTENT_COLORIMETRIC)
-    return HWC2::Error::Unsupported;
-
-  color_mode_ = mode;
-  return HWC2::Error::None;
-}
-
-#endif /* PLATFORM_SDK_VERSION > 27 */
-
-const Backend *DrmHwcTwo::HwcDisplay::backend() const {
-  return backend_.get();
-}
-
-void DrmHwcTwo::HwcDisplay::set_backend(std::unique_ptr<Backend> backend) {
-  backend_ = std::move(backend);
-}
-
 void DrmHwcTwo::HandleDisplayHotplug(hwc2_display_t displayid, int state) {
   const std::lock_guard<std::mutex> lock(callback_lock_);