diff --git a/sdm/libs/hwc2/hwc_color_manager.cpp b/sdm/libs/hwc2/hwc_color_manager.cpp
index 3075cbb..c40ec4b 100644
--- a/sdm/libs/hwc2/hwc_color_manager.cpp
+++ b/sdm/libs/hwc2/hwc_color_manager.cpp
@@ -166,158 +166,8 @@
   return ret;
 }
 
-bool HWCColorManager::SolidFillLayersPrepare(hwc_display_contents_1_t **displays,
-                                             HWCDisplay *hwc_display) {
-  SCOPE_LOCK(locker_);
-
-  // Query HWCColorManager if QDCM tool requesting SOLID_FILL mode.
-  uint32_t solid_fill_color = Get8BitsARGBColorValue(solid_fill_params_);
-  hwc_display_contents_1_t *layer_list = displays[HWC_DISPLAY_PRIMARY];
-
-  if (solid_fill_enable_ && solid_fill_layers_ && layer_list) {
-    // 1. shallow copy HWC_FRAMEBUFFER_TARGET layer info solid fill layer list.
-    solid_fill_layers_->hwLayers[1] = layer_list->hwLayers[layer_list->numHwLayers - 1];
-
-    // 2. continue the prepare<> on solid_fill_layers.
-    hwc_display->Perform(HWCDisplayPrimary::SET_QDCM_SOLID_FILL_INFO, solid_fill_color);
-    // TODO(user): Remove the display_contents generated here and
-    // use the solid fill layer support in HWC2 to set this up
-    // hwc_display->Prepare(solid_fill_layers_);  // RECT info included.
-
-    // 3. Set HWC_OVERLAY to all SF layers before returning to framework.
-    for (size_t i = 0; i < (layer_list->numHwLayers - 1); i++) {
-      hwc_layer_1_t *layer = &layer_list->hwLayers[i];
-      layer->compositionType = HWC_OVERLAY;
-    }
-
-    return true;
-  } else if (!solid_fill_enable_) {
-    hwc_display->Perform(HWCDisplayPrimary::UNSET_QDCM_SOLID_FILL_INFO, 0);
-  }
-
-  return false;
-}
-
-bool HWCColorManager::SolidFillLayersSet(hwc_display_contents_1_t **displays,
-                                         HWCDisplay *hwc_display) {
-  // Query HWCColorManager if QDCM tool requesting SOLID_FILL mode.
-  SCOPE_LOCK(locker_);
-  hwc_display_contents_1_t *layer_list = displays[HWC_DISPLAY_PRIMARY];
-  if (solid_fill_enable_ && solid_fill_layers_ && layer_list) {
-    // TODO(user): Present solid fill
-    // hwc_display->Commit(solid_fill_layers_);
-
-    // SurfaceFlinger layer stack is dropped in solid fill case and replaced with local layer stack
-    // Close acquire fence fds associated with SF layer stack
-    // Close release/retire fence fds returned along with local layer stack
-    for (size_t i = 0; i < (layer_list->numHwLayers - 1); i++) {
-      int &fence_fd = layer_list->hwLayers[i].acquireFenceFd;
-      if (fence_fd >= 0) {
-        close(fence_fd);
-        fence_fd = -1;
-      }
-    }
-
-    for (size_t i = 0; i < (solid_fill_layers_->numHwLayers - 1); i++) {
-      int &fence_fd = solid_fill_layers_->hwLayers[i].releaseFenceFd;
-      if (fence_fd >= 0) {
-        close(fence_fd);
-        fence_fd = -1;
-      }
-    }
-    if (solid_fill_layers_->retireFenceFd >= 0) {
-      close(solid_fill_layers_->retireFenceFd);
-      solid_fill_layers_->retireFenceFd = -1;
-    }
-
-    return true;
-  }
-
-  return false;
-}
-
-int HWCColorManager::CreateSolidFillLayers(HWCDisplay *hwc_display) {
-  int ret = 0;
-
-  if (!solid_fill_layers_) {
-    uint32_t size = sizeof(hwc_display_contents_1) + kNumSolidFillLayers * sizeof(hwc_layer_1_t);
-    uint32_t primary_width = 0;
-    uint32_t primary_height = 0;
-
-    hwc_display->GetMixerResolution(&primary_width, &primary_height);
-    uint8_t *buf = new uint8_t[size]();
-    // handle for solid fill layer with fd = -1.
-    private_handle_t *handle = new private_handle_t(-1, 0, private_handle_t::PRIV_FLAGS_FRAMEBUFFER,
-                                                    BUFFER_TYPE_UI, HAL_PIXEL_FORMAT_RGBA_8888,
-                                                    INT32(primary_width), INT32(primary_height));
-
-    if (!buf || !handle) {
-      DLOGE("Failed to allocate memory.");
-      if (buf)
-        delete[] buf;
-      if (handle)
-        delete handle;
-
-      return -ENOMEM;
-    }
-
-    solid_fill_layers_ = reinterpret_cast<hwc_display_contents_1 *>(buf);
-    hwc_layer_1_t &layer = solid_fill_layers_->hwLayers[0];
-    layer.handle = handle;
-  }
-
-  solid_fill_layers_->flags = HWC_GEOMETRY_CHANGED;
-  solid_fill_layers_->numHwLayers = kNumSolidFillLayers;
-  solid_fill_layers_->retireFenceFd = -1;
-  solid_fill_layers_->outbuf = NULL;
-  solid_fill_layers_->outbufAcquireFenceFd = -1;
-
-  hwc_layer_1_t &layer = solid_fill_layers_->hwLayers[0];
-  hwc_rect_t solid_fill_rect = {
-      INT(solid_fill_params_.rect.x), INT(solid_fill_params_.rect.y),
-      solid_fill_params_.rect.x + INT(solid_fill_params_.rect.width),
-      solid_fill_params_.rect.y + INT(solid_fill_params_.rect.height),
-  };
-
-  layer.compositionType = HWC_FRAMEBUFFER;
-  layer.blending = HWC_BLENDING_PREMULT;
-  layer.sourceCropf.left = solid_fill_params_.rect.x;
-  layer.sourceCropf.top = solid_fill_params_.rect.y;
-  layer.sourceCropf.right = UINT32(solid_fill_params_.rect.x) + solid_fill_params_.rect.width;
-  layer.sourceCropf.bottom = UINT32(solid_fill_params_.rect.y) + solid_fill_params_.rect.height;
-  layer.acquireFenceFd = -1;
-  layer.releaseFenceFd = -1;
-  layer.flags = 0;
-  layer.transform = 0;
-  layer.hints = 0;
-  layer.planeAlpha = 0xff;
-  layer.displayFrame = solid_fill_rect;
-  layer.visibleRegionScreen.numRects = 1;
-  layer.visibleRegionScreen.rects = &layer.displayFrame;
-  layer.surfaceDamage.numRects = 0;
-
-  return ret;
-}
-
-void HWCColorManager::DestroySolidFillLayers() {
-  if (solid_fill_layers_) {
-    hwc_layer_1_t &layer = solid_fill_layers_->hwLayers[0];
-    uint8_t *buf = reinterpret_cast<uint8_t *>(solid_fill_layers_);
-    private_handle_t const *hnd = reinterpret_cast<private_handle_t const *>(layer.handle);
-
-    if (hnd)
-      delete hnd;
-
-    if (buf)
-      delete[] buf;
-
-    solid_fill_layers_ = NULL;
-  }
-}
-
 int HWCColorManager::SetSolidFill(const void *params, bool enable, HWCDisplay *hwc_display) {
   SCOPE_LOCK(locker_);
-  int ret = 0;
 
   if (params) {
     solid_fill_params_ = *reinterpret_cast<const PPColorFillParams *>(params);
@@ -325,15 +175,21 @@
     solid_fill_params_ = PPColorFillParams();
   }
 
+  uint32_t solid_fill_color = Get8BitsARGBColorValue(solid_fill_params_);
   if (enable) {
-    // will create solid fill layers for rendering if not present.
-    ret = CreateSolidFillLayers(hwc_display);
-  } else {
-    DestroySolidFillLayers();
-  }
-  solid_fill_enable_ = enable;
+    LayerRect solid_fill_rect = {
+      FLOAT(solid_fill_params_.rect.x), FLOAT(solid_fill_params_.rect.y),
+      FLOAT(solid_fill_params_.rect.x) + FLOAT(solid_fill_params_.rect.width),
+      FLOAT(solid_fill_params_.rect.y) + FLOAT(solid_fill_params_.rect.height),
+    };
 
-  return ret;
+    hwc_display->Perform(HWCDisplayPrimary::SET_QDCM_SOLID_FILL_INFO, solid_fill_color);
+    hwc_display->Perform(HWCDisplayPrimary::SET_QDCM_SOLID_FILL_RECT, &solid_fill_rect);
+  } else {
+    hwc_display->Perform(HWCDisplayPrimary::UNSET_QDCM_SOLID_FILL_INFO, 0);
+  }
+
+  return 0;
 }
 
 int HWCColorManager::SetFrameCapture(void *params, bool enable, HWCDisplay *hwc_display) {
diff --git a/sdm/libs/hwc2/hwc_color_manager.h b/sdm/libs/hwc2/hwc_color_manager.h
new file mode 100644
index 0000000..130dca9
--- /dev/null
+++ b/sdm/libs/hwc2/hwc_color_manager.h
@@ -0,0 +1,141 @@
+/* Copyright (c) 2015-2016, The Linux Foundataion. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are
+* met:
+*     * Redistributions of source code must retain the above copyright
+*       notice, this list of conditions and the following disclaimer.
+*     * Redistributions in binary form must reproduce the above
+*       copyright notice, this list of conditions and the following
+*       disclaimer in the documentation and/or other materials provided
+*       with the distribution.
+*     * Neither the name of The Linux Foundation nor the names of its
+*       contributors may be used to endorse or promote products derived
+*       from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+* ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+*/
+
+#ifndef __HWC_COLOR_MANAGER_H__
+#define __HWC_COLOR_MANAGER_H__
+
+#include <stdlib.h>
+#include <binder/Parcel.h>
+#include <powermanager/IPowerManager.h>
+#include <binder/BinderService.h>
+#include <core/sdm_types.h>
+#include <utils/locker.h>
+
+namespace sdm {
+
+// This macro defines name for display APIs interface wrapper library.
+// This macro shall be used to load library using dlopen().
+#define DISPLAY_API_INTERFACE_LIBRARY_NAME "libsdm-disp-apis.so"
+
+// This macro defines variable name of display color APIs function tables
+// This macro shall be used to specify name of the variable in dlsym().
+#define DISPLAY_API_FUNC_TABLES "display_color_apis_ftables"
+#define QDCM_DIAG_CLIENT_LIBRARY_NAME "libsdm-diag.so"
+#define INIT_QDCM_DIAG_CLIENT_NAME "QDCMDiagInit"
+#define DEINIT_QDCM_DIAG_CLIENT_NAME "QDCMDiagDeInit"
+
+typedef int (*QDCMDiagInit)(void *ftables);
+
+typedef int (*QDCMDiagDeInit)(void);
+
+// Class to encapsulte all details of managing QDCM operating mode.
+class HWCQDCMModeManager {
+ public:
+  static const uint32_t kSocketCMDMaxLength = 4096;
+  static const uint32_t kFullWakeLock = 0x0000001a;
+  static const uint32_t kAcquireCauseWakeup = 0x10000000;
+  static const uint32_t kONAfterRelease = 0x20000000;
+  enum ActiveFeatureID {
+    kCABLFeature,
+    kADFeature,
+    kSVIFeature,
+    kMaxNumActiveFeature,
+  };
+
+  struct ActiveFeatureCMD {
+    const char *cmd_on = NULL;
+    const char *cmd_off = NULL;
+    const char *cmd_query_status = NULL;
+    const char *running = NULL;
+    ActiveFeatureCMD(const char *arg1, const char *arg2, const char *arg3, const char *arg4)
+        : cmd_on(arg1), cmd_off(arg2), cmd_query_status(arg3), running(arg4) {}
+  };
+
+  static const ActiveFeatureCMD kActiveFeatureCMD[kMaxNumActiveFeature];
+
+ public:
+  static HWCQDCMModeManager *CreateQDCMModeMgr();
+  ~HWCQDCMModeManager();
+  int EnableQDCMMode(bool enable, HWCDisplay *hwc_display);
+
+ protected:
+  bool SendSocketCmd();
+  int AcquireAndroidWakeLock(bool enable);
+  int EnableActiveFeatures(bool enable);
+  int EnableActiveFeatures(bool enable, const ActiveFeatureCMD &cmds, bool *was_running);
+
+ private:
+  bool cabl_was_running_ = false;
+  int socket_fd_ = -1;
+  android::sp<android::IBinder> wakelock_token_ = NULL;
+  android::sp<android::IPowerManager> power_mgr_ = NULL;
+  uint32_t entry_timeout_ = 0;
+  static const char *const kSocketName;
+  static const char *const kTagName;
+  static const char *const kPackageName;
+};
+
+// Class to encapsulte all HWC/OS specific behaviours for ColorManager.
+class HWCColorManager {
+ public:
+  static const int kNumSolidFillLayers = 2;
+  static HWCColorManager *CreateColorManager();
+  static int CreatePayloadFromParcel(const android::Parcel &in, uint32_t *disp_id,
+                                     PPDisplayAPIPayload *sink);
+  static void MarshallStructIntoParcel(const PPDisplayAPIPayload &data,
+                                       android::Parcel *out_parcel);
+
+  ~HWCColorManager();
+  void DestroyColorManager();
+  int EnableQDCMMode(bool enable, HWCDisplay *hwc_display);
+  int SetSolidFill(const void *params, bool enable, HWCDisplay *hwc_display);
+  int SetFrameCapture(void *params, bool enable, HWCDisplay *hwc_display);
+
+ protected:
+  int CreateSolidFillLayers(HWCDisplay *hwc_display);
+  void DestroySolidFillLayers();
+  static uint32_t Get8BitsARGBColorValue(const PPColorFillParams &params);
+
+ private:
+  DynLib color_apis_lib_;
+  DynLib diag_client_lib_;
+  void *color_apis_ = NULL;
+  QDCMDiagInit qdcm_diag_init_ = NULL;
+  QDCMDiagDeInit qdcm_diag_deinit_ = NULL;
+  HWCQDCMModeManager *qdcm_mode_mgr_ = NULL;
+
+  PPColorFillParams solid_fill_params_;
+  HWCBufferAllocator *buffer_allocator_ = NULL;
+  BufferInfo buffer_info;
+  Locker locker_;
+};
+
+}  // namespace sdm
+
+#endif  // __HWC_COLOR_MANAGER_H__
diff --git a/sdm/libs/hwc2/hwc_display.cpp b/sdm/libs/hwc2/hwc_display.cpp
index 1f0bd55..868b0f7 100644
--- a/sdm/libs/hwc2/hwc_display.cpp
+++ b/sdm/libs/hwc2/hwc_display.cpp
@@ -389,6 +389,16 @@
   layer_stack_.layers.push_back(client_target_->GetSDMLayer());
 }
 
+void HWCDisplay::BuildSolidFillStack() {
+  layer_stack_ = LayerStack();
+  display_rect_ = LayerRect();
+
+  layer_stack_.layers.push_back(solid_fill_layer_);
+  layer_stack_.flags.geometry_changed = 1U;
+  // Append client target to the layer stack
+  layer_stack_.layers.push_back(client_target_->GetSDMLayer());
+}
+
 HWC2::Error HWCDisplay::SetLayerZOrder(hwc2_layer_t layer_id, uint32_t z) {
   const auto map_layer = layer_map_.find(layer_id);
   if (map_layer == layer_map_.end()) {
@@ -1416,6 +1426,68 @@
   return ret;
 }
 
+void HWCDisplay::SolidFillPrepare() {
+  if (solid_fill_enable_) {
+    if (solid_fill_layer_ == NULL) {
+      // Create a dummy layer here
+      solid_fill_layer_ = new Layer();
+      solid_fill_layer_->input_buffer = new LayerBuffer();
+    }
+    uint32_t primary_width = 0, primary_height = 0;
+    GetMixerResolution(&primary_width, &primary_height);
+
+    LayerBuffer *layer_buffer = solid_fill_layer_->input_buffer;
+    layer_buffer->width = primary_width;
+    layer_buffer->height = primary_height;
+    layer_buffer->acquire_fence_fd = -1;
+    layer_buffer->release_fence_fd = -1;
+
+    LayerRect rect;
+    rect.top = 0; rect.left = 0;
+    rect.right = primary_width;
+    rect.bottom = primary_height;
+
+    solid_fill_layer_->composition = kCompositionGPU;
+    solid_fill_layer_->src_rect = rect;
+    solid_fill_layer_->dst_rect = rect;
+
+    solid_fill_layer_->blending = kBlendingPremultiplied;
+    solid_fill_layer_->solid_fill_color = solid_fill_color_;
+    solid_fill_layer_->frame_rate = 60;
+    solid_fill_layer_->visible_regions.push_back(solid_fill_layer_->dst_rect);
+    solid_fill_layer_->flags.updating = 1;
+    solid_fill_layer_->flags.solid_fill = true;
+  } else {
+    // delete the dummy layer
+    if (solid_fill_layer_) {
+      delete solid_fill_layer_->input_buffer;
+    }
+    delete solid_fill_layer_;
+    solid_fill_layer_ = NULL;
+  }
+
+  if (solid_fill_enable_ && solid_fill_layer_) {
+    BuildSolidFillStack();
+    MarkLayersForGPUBypass();
+  }
+
+  return;
+}
+
+void HWCDisplay::SolidFillCommit() {
+  if (solid_fill_enable_ && solid_fill_layer_) {
+    LayerBuffer *layer_buffer = solid_fill_layer_->input_buffer;
+    if (layer_buffer->release_fence_fd > 0) {
+      close(layer_buffer->release_fence_fd);
+      layer_buffer->release_fence_fd = -1;
+    }
+    if (layer_stack_.retire_fence_fd > 0) {
+      close(layer_stack_.retire_fence_fd);
+      layer_stack_.retire_fence_fd = -1;
+    }
+  }
+}
+
 int HWCDisplay::GetVisibleDisplayRect(hwc_rect_t *visible_rect) {
   if (!IsValid(display_rect_)) {
     return -EINVAL;
@@ -1456,7 +1528,7 @@
 bool HWCDisplay::SingleLayerUpdating(void) {
   uint32_t updating_count = 0;
 
-  for (uint i = 0; i < layer_set_.size(); i++) {
+  for (uint i = 0; i < layer_stack_.layers.size(); i++) {
     auto layer = layer_stack_.layers.at(i);
     if (layer->flags.updating) {
       updating_count++;
diff --git a/sdm/libs/hwc2/hwc_display.h b/sdm/libs/hwc2/hwc_display.h
index 277514d..880fca2 100644
--- a/sdm/libs/hwc2/hwc_display.h
+++ b/sdm/libs/hwc2/hwc_display.h
@@ -130,9 +130,12 @@
   int ToggleScreenUpdates(bool enable);
   int ColorSVCRequestRoute(const PPDisplayAPIPayload &in_payload, PPDisplayAPIPayload *out_payload,
                            PPPendingParams *pending_action);
+  void SolidFillPrepare();
+  void SolidFillCommit();
   DisplayClass GetDisplayClass();
   int GetVisibleDisplayRect(hwc_rect_t *rect);
   void BuildLayerStack(void);
+  void BuildSolidFillStack(void);
   HWCLayer *GetHWCLayer(hwc2_layer_t layer);
 
   // HWC2 APIs
@@ -249,6 +252,8 @@
   bool secure_display_active_ = false;
   bool skip_prepare_ = false;
   bool solid_fill_enable_ = false;
+  Layer *solid_fill_layer_ = NULL;
+  LayerRect solid_fill_rect_ = {};
   uint32_t solid_fill_color_ = 0;
   LayerRect display_rect_;
   bool validated_ = false;
diff --git a/sdm/libs/hwc2/hwc_display_primary.cpp b/sdm/libs/hwc2/hwc_display_primary.cpp
index 56ff335..7dac376 100644
--- a/sdm/libs/hwc2/hwc_display_primary.cpp
+++ b/sdm/libs/hwc2/hwc_display_primary.cpp
@@ -174,6 +174,8 @@
 
   // Fill in the remaining blanks in the layers and add them to the SDM layerstack
   BuildLayerStack();
+  // Checks and replaces layer stack for solid fill
+  SolidFillPrepare();
 
   bool pending_output_dump = dump_frame_count_ && dump_output_to_file_;
 
@@ -224,9 +226,11 @@
     status = HWCDisplay::CommitLayerStack();
     if (status == HWC2::Error::None) {
       HandleFrameOutput();
+      SolidFillCommit();
       status = HWCDisplay::PostCommitLayerStack(out_retire_fence);
     }
   }
+
   CloseAcquireFds();
   return status;
 }
@@ -276,28 +280,40 @@
 int HWCDisplayPrimary::Perform(uint32_t operation, ...) {
   va_list args;
   va_start(args, operation);
-  int val = va_arg(args, int32_t);
-  va_end(args);
+  int val = 0;
+  LayerRect *rect = NULL;
+
   switch (operation) {
     case SET_METADATA_DYN_REFRESH_RATE:
+      val = va_arg(args, int32_t);
       SetMetaDataRefreshRateFlag(val);
       break;
     case SET_BINDER_DYN_REFRESH_RATE:
+      val = va_arg(args, int32_t);
       ForceRefreshRate(UINT32(val));
       break;
     case SET_DISPLAY_MODE:
+      val = va_arg(args, int32_t);
       SetDisplayMode(UINT32(val));
       break;
     case SET_QDCM_SOLID_FILL_INFO:
+      val = va_arg(args, int32_t);
       SetQDCMSolidFillInfo(true, UINT32(val));
       break;
     case UNSET_QDCM_SOLID_FILL_INFO:
+      val = va_arg(args, int32_t);
       SetQDCMSolidFillInfo(false, UINT32(val));
       break;
+    case SET_QDCM_SOLID_FILL_RECT:
+      rect = va_arg(args, LayerRect*);
+      solid_fill_rect_ = *rect;
+      break;
     default:
       DLOGW("Invalid operation %d", operation);
+      va_end(args);
       return -EINVAL;
   }
+  va_end(args);
 
   return 0;
 }
diff --git a/sdm/libs/hwc2/hwc_display_primary.h b/sdm/libs/hwc2/hwc_display_primary.h
index 32d265e..ab46cde 100644
--- a/sdm/libs/hwc2/hwc_display_primary.h
+++ b/sdm/libs/hwc2/hwc_display_primary.h
@@ -45,6 +45,7 @@
     SET_DISPLAY_MODE,
     SET_QDCM_SOLID_FILL_INFO,
     UNSET_QDCM_SOLID_FILL_INFO,
+    SET_QDCM_SOLID_FILL_RECT,
   };
 
   static int Create(CoreInterface *core_intf, BufferAllocator *buffer_allocator,
diff --git a/sdm/libs/hwc2/hwc_session.cpp b/sdm/libs/hwc2/hwc_session.cpp
index 9344ed6..30bc11c 100644
--- a/sdm/libs/hwc2/hwc_session.cpp
+++ b/sdm/libs/hwc2/hwc_session.cpp
@@ -382,10 +382,9 @@
   if (!device) {
     return HWC2_ERROR_BAD_DISPLAY;
   }
-  // TODO(user): Handle solid fill layers
+
   auto status = HWC2::Error::BadDisplay;
   // TODO(user): Handle virtual display/HDMI concurrency
-
   if (hwc_session->hwc_display_[display]) {
     status = hwc_session->hwc_display_[display]->Present(out_retire_fence);
     // This is only indicative of how many times SurfaceFlinger posts