drmhwctwo.cpp

   1 /*
   2  * Copyright (C) 2016 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
  18 #define LOG_TAG "hwc-drm-two"
  19
  20 #include "drmdisplaycomposition.h"
  21 #include "drmhwcomposer.h"
  22 #include "drmhwctwo.h"
  23 #include "platform.h"
  24 #include "vsyncworker.h"
  25
  26 #include <inttypes.h>
  27 #include <string>
  28
  29 #include <log/log.h>
  30 #include <cutils/properties.h>
  31 #include <hardware/hardware.h>
  32 #include <hardware/hwcomposer2.h>
  33
  34 namespace android {
  35
  36 class DrmVsyncCallback : public VsyncCallback {
  37  public:
  38   DrmVsyncCallback(hwc2_callback_data_t data, hwc2_function_pointer_t hook)
  39       : data_(data), hook_(hook) {
  40   }
  41
  42   void Callback(int display, int64_t timestamp) {
  43     auto hook = reinterpret_cast<HWC2_PFN_VSYNC>(hook_);
  44     hook(data_, display, timestamp);
  45   }
  46
  47  private:
  48   hwc2_callback_data_t data_;
  49   hwc2_function_pointer_t hook_;
  50 };
  51
  52 DrmHwcTwo::DrmHwcTwo() {
  53   common.tag = HARDWARE_DEVICE_TAG;
  54   common.version = HWC_DEVICE_API_VERSION_2_0;
  55   common.close = HookDevClose;
  56   getCapabilities = HookDevGetCapabilities;
  57   getFunction = HookDevGetFunction;
  58 }
  59
  60 HWC2::Error DrmHwcTwo::Init() {
  61   int ret = drm_.Init();
  62   if (ret) {
  63     ALOGE("Can't initialize drm object %d", ret);
  64     return HWC2::Error::NoResources;
  65   }
  66
  67   importer_.reset(Importer::CreateInstance(&drm_));
  68   if (!importer_) {
  69     ALOGE("Failed to create importer instance");
  70     return HWC2::Error::NoResources;
  71   }
  72
  73   ret = hw_get_module(GRALLOC_HARDWARE_MODULE_ID,
  74                       (const hw_module_t **)&gralloc_);
  75   if (ret) {
  76     ALOGE("Failed to open gralloc module %d", ret);
  77     return HWC2::Error::NoResources;
  78   }
  79
  80   displays_.emplace(std::piecewise_construct,
  81                     std::forward_as_tuple(HWC_DISPLAY_PRIMARY),
  82                     std::forward_as_tuple(&drm_, importer_, gralloc_,
  83                                           HWC_DISPLAY_PRIMARY,
  84                                           HWC2::DisplayType::Physical));
  85
  86   DrmCrtc *crtc = drm_.GetCrtcForDisplay(static_cast<int>(HWC_DISPLAY_PRIMARY));
  87   if (!crtc) {
  88     ALOGE("Failed to get crtc for display %d",
  89           static_cast<int>(HWC_DISPLAY_PRIMARY));
  90     return HWC2::Error::BadDisplay;
  91   }
  92
  93   std::vector<DrmPlane *> display_planes;
  94   for (auto &plane : drm_.planes()) {
  95     if (plane->GetCrtcSupported(*crtc))
  96       display_planes.push_back(plane.get());
  97   }
  98   displays_.at(HWC_DISPLAY_PRIMARY).Init(&display_planes);
  99   return HWC2::Error::None;
 100 }
 101
 102 template <typename... Args>
 103 static inline HWC2::Error unsupported(char const *func, Args... /*args*/) {
 104   ALOGV("Unsupported function: %s", func);
 105   return HWC2::Error::Unsupported;
 106 }
 107
 108 static inline void supported(char const *func) {
 109   ALOGV("Supported function: %s", func);
 110 }
 111
 112 HWC2::Error DrmHwcTwo::CreateVirtualDisplay(uint32_t width, uint32_t height,
 113                                             int32_t *format,
 114                                             hwc2_display_t *display) {
 115   // TODO: Implement virtual display
 116   return unsupported(__func__, width, height, format, display);
 117 }
 118
 119 HWC2::Error DrmHwcTwo::DestroyVirtualDisplay(hwc2_display_t display) {
 120   // TODO: Implement virtual display
 121   return unsupported(__func__, display);
 122 }
 123
 124 void DrmHwcTwo::Dump(uint32_t *size, char *buffer) {
 125   // TODO: Implement dump
 126   unsupported(__func__, size, buffer);
 127 }
 128
 129 uint32_t DrmHwcTwo::GetMaxVirtualDisplayCount() {
 130   // TODO: Implement virtual display
 131   unsupported(__func__);
 132   return 0;
 133 }
 134
 135 HWC2::Error DrmHwcTwo::RegisterCallback(int32_t descriptor,
 136                                         hwc2_callback_data_t data,
 137                                         hwc2_function_pointer_t function) {
 138   supported(__func__);
 139   auto callback = static_cast<HWC2::Callback>(descriptor);
 140   callbacks_.emplace(callback, HwcCallback(data, function));
 141
 142   switch (callback) {
 143     case HWC2::Callback::Hotplug: {
 144       auto hotplug = reinterpret_cast<HWC2_PFN_HOTPLUG>(function);
 145       hotplug(data, HWC_DISPLAY_PRIMARY,
 146               static_cast<int32_t>(HWC2::Connection::Connected));
 147       break;
 148     }
 149     case HWC2::Callback::Vsync: {
 150       for (std::pair<const hwc2_display_t, DrmHwcTwo::HwcDisplay> &d :
 151            displays_)
 152         d.second.RegisterVsyncCallback(data, function);
 153       break;
 154     }
 155     default:
 156       break;
 157   }
 158   return HWC2::Error::None;
 159 }
 160
 161 DrmHwcTwo::HwcDisplay::HwcDisplay(DrmResources *drm,
 162                                   std::shared_ptr<Importer> importer,
 163                                   const gralloc_module_t *gralloc,
 164                                   hwc2_display_t handle, HWC2::DisplayType type)
 165     : drm_(drm),
 166       importer_(importer),
 167       gralloc_(gralloc),
 168       handle_(handle),
 169       type_(type) {
 170   supported(__func__);
 171 }
 172
 173 HWC2::Error DrmHwcTwo::HwcDisplay::Init(std::vector<DrmPlane *> *planes) {
 174   supported(__func__);
 175   planner_ = Planner::CreateInstance(drm_);
 176   if (!planner_) {
 177     ALOGE("Failed to create planner instance for composition");
 178     return HWC2::Error::NoResources;
 179   }
 180
 181   int display = static_cast<int>(handle_);
 182   int ret = compositor_.Init(drm_, display);
 183   if (ret) {
 184     ALOGE("Failed display compositor init for display %d (%d)", display, ret);
 185     return HWC2::Error::NoResources;
 186   }
 187
 188   // Split up the given display planes into primary and overlay to properly
 189   // interface with the composition
 190   char use_overlay_planes_prop[PROPERTY_VALUE_MAX];
 191   property_get("hwc.drm.use_overlay_planes", use_overlay_planes_prop, "1");
 192   bool use_overlay_planes = atoi(use_overlay_planes_prop);
 193   for (auto &plane : *planes) {
 194     if (plane->type() == DRM_PLANE_TYPE_PRIMARY)
 195       primary_planes_.push_back(plane);
 196     else if (use_overlay_planes && (plane)->type() == DRM_PLANE_TYPE_OVERLAY)
 197       overlay_planes_.push_back(plane);
 198   }
 199
 200   crtc_ = drm_->GetCrtcForDisplay(display);
 201   if (!crtc_) {
 202     ALOGE("Failed to get crtc for display %d", display);
 203     return HWC2::Error::BadDisplay;
 204   }
 205
 206   connector_ = drm_->GetConnectorForDisplay(display);
 207   if (!connector_) {
 208     ALOGE("Failed to get connector for display %d", display);
 209     return HWC2::Error::BadDisplay;
 210   }
 211
 212   // Fetch the number of modes from the display
 213   uint32_t num_configs;
 214   HWC2::Error err = GetDisplayConfigs(&num_configs, NULL);
 215   if (err != HWC2::Error::None || !num_configs)
 216     return err;
 217
 218   // Grab the first mode, we'll choose this as the active mode
 219   // TODO: Should choose the preferred mode here
 220   hwc2_config_t default_config;
 221   num_configs = 1;
 222   err = GetDisplayConfigs(&num_configs, &default_config);
 223   if (err != HWC2::Error::None)
 224     return err;
 225
 226   ret = vsync_worker_.Init(drm_, display);
 227   if (ret) {
 228     ALOGE("Failed to create event worker for d=%d %d\n", display, ret);
 229     return HWC2::Error::BadDisplay;
 230   }
 231
 232   return SetActiveConfig(default_config);
 233 }
 234
 235 HWC2::Error DrmHwcTwo::HwcDisplay::RegisterVsyncCallback(
 236     hwc2_callback_data_t data, hwc2_function_pointer_t func) {
 237   supported(__func__);
 238   auto callback = std::make_shared<DrmVsyncCallback>(data, func);
 239   vsync_worker_.RegisterCallback(std::move(callback));
 240   return HWC2::Error::None;
 241 }
 242
 243 HWC2::Error DrmHwcTwo::HwcDisplay::AcceptDisplayChanges() {
 244   supported(__func__);
 245   for (std::pair<const hwc2_layer_t, DrmHwcTwo::HwcLayer> &l : layers_)
 246     l.second.accept_type_change();
 247   return HWC2::Error::None;
 248 }
 249
 250 HWC2::Error DrmHwcTwo::HwcDisplay::CreateLayer(hwc2_layer_t *layer) {
 251   supported(__func__);
 252   layers_.emplace(static_cast<hwc2_layer_t>(layer_idx_), HwcLayer());
 253   *layer = static_cast<hwc2_layer_t>(layer_idx_);
 254   ++layer_idx_;
 255   return HWC2::Error::None;
 256 }
 257
 258 HWC2::Error DrmHwcTwo::HwcDisplay::DestroyLayer(hwc2_layer_t layer) {
 259   supported(__func__);
 260   layers_.erase(layer);
 261   return HWC2::Error::None;
 262 }
 263
 264 HWC2::Error DrmHwcTwo::HwcDisplay::GetActiveConfig(hwc2_config_t *config) {
 265   supported(__func__);
 266   DrmMode const &mode = connector_->active_mode();
 267   if (mode.id() == 0)
 268     return HWC2::Error::BadConfig;
 269
 270   *config = mode.id();
 271   return HWC2::Error::None;
 272 }
 273
 274 HWC2::Error DrmHwcTwo::HwcDisplay::GetChangedCompositionTypes(
 275     uint32_t *num_elements, hwc2_layer_t *layers, int32_t *types) {
 276   supported(__func__);
 277   uint32_t num_changes = 0;
 278   for (std::pair<const hwc2_layer_t, DrmHwcTwo::HwcLayer> &l : layers_) {
 279     if (l.second.type_changed()) {
 280       if (layers && num_changes < *num_elements)
 281         layers[num_changes] = l.first;
 282       if (types && num_changes < *num_elements)
 283         types[num_changes] = static_cast<int32_t>(l.second.validated_type());
 284       ++num_changes;
 285     }
 286   }
 287   if (!layers && !types)
 288     *num_elements = num_changes;
 289   return HWC2::Error::None;
 290 }
 291
 292 HWC2::Error DrmHwcTwo::HwcDisplay::GetClientTargetSupport(uint32_t width,
 293                                                           uint32_t height,
 294                                                           int32_t /*format*/,
 295                                                           int32_t dataspace) {
 296   supported(__func__);
 297   std::pair<uint32_t, uint32_t> min = drm_->min_resolution();
 298   std::pair<uint32_t, uint32_t> max = drm_->max_resolution();
 299
 300   if (width < min.first || height < min.second)
 301     return HWC2::Error::Unsupported;
 302
 303   if (width > max.first || height > max.second)
 304     return HWC2::Error::Unsupported;
 305
 306   if (dataspace != HAL_DATASPACE_UNKNOWN &&
 307       dataspace != HAL_DATASPACE_STANDARD_UNSPECIFIED)
 308     return HWC2::Error::Unsupported;
 309
 310   // TODO: Validate format can be handled by either GL or planes
 311   return HWC2::Error::None;
 312 }
 313
 314 HWC2::Error DrmHwcTwo::HwcDisplay::GetColorModes(uint32_t *num_modes,
 315                                                  int32_t *modes) {
 316   supported(__func__);
 317   if (!modes)
 318     *num_modes = 1;
 319
 320   if (modes)
 321     *modes = HAL_COLOR_MODE_NATIVE;
 322
 323   return HWC2::Error::None;
 324 }
 325
 326 HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayAttribute(hwc2_config_t config,
 327                                                        int32_t attribute_in,
 328                                                        int32_t *value) {
 329   supported(__func__);
 330   auto mode =
 331       std::find_if(connector_->modes().begin(), connector_->modes().end(),
 332                    [config](DrmMode const &m) { return m.id() == config; });
 333   if (mode == connector_->modes().end()) {
 334     ALOGE("Could not find active mode for %d", config);
 335     return HWC2::Error::BadConfig;
 336   }
 337
 338   static const int32_t kUmPerInch = 25400;
 339   uint32_t mm_width = connector_->mm_width();
 340   uint32_t mm_height = connector_->mm_height();
 341   auto attribute = static_cast<HWC2::Attribute>(attribute_in);
 342   switch (attribute) {
 343     case HWC2::Attribute::Width:
 344       *value = mode->h_display();
 345       break;
 346     case HWC2::Attribute::Height:
 347       *value = mode->v_display();
 348       break;
 349     case HWC2::Attribute::VsyncPeriod:
 350       // in nanoseconds
 351       *value = 1000 * 1000 * 1000 / mode->v_refresh();
 352       break;
 353     case HWC2::Attribute::DpiX:
 354       // Dots per 1000 inches
 355       *value = mm_width ? (mode->h_display() * kUmPerInch) / mm_width : -1;
 356       break;
 357     case HWC2::Attribute::DpiY:
 358       // Dots per 1000 inches
 359       *value = mm_height ? (mode->v_display() * kUmPerInch) / mm_height : -1;
 360       break;
 361     default:
 362       *value = -1;
 363       return HWC2::Error::BadConfig;
 364   }
 365   return HWC2::Error::None;
 366 }
 367
 368 HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayConfigs(uint32_t *num_configs,
 369                                                      hwc2_config_t *configs) {
 370   supported(__func__);
 371   // Since this callback is normally invoked twice (once to get the count, and
 372   // once to populate configs), we don't really want to read the edid
 373   // redundantly. Instead, only update the modes on the first invocation. While
 374   // it's possible this will result in stale modes, it'll all come out in the
 375   // wash when we try to set the active config later.
 376   if (!configs) {
 377     int ret = connector_->UpdateModes();
 378     if (ret) {
 379       ALOGE("Failed to update display modes %d", ret);
 380       return HWC2::Error::BadDisplay;
 381     }
 382   }
 383
 384   auto num_modes = static_cast<uint32_t>(connector_->modes().size());
 385   if (!configs) {
 386     *num_configs = num_modes;
 387     return HWC2::Error::None;
 388   }
 389
 390   uint32_t idx = 0;
 391   for (const DrmMode &mode : connector_->modes()) {
 392     if (idx >= *num_configs)
 393       break;
 394     configs[idx++] = mode.id();
 395   }
 396   *num_configs = idx;
 397   return HWC2::Error::None;
 398 }
 399
 400 HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayName(uint32_t *size, char *name) {
 401   supported(__func__);
 402   std::ostringstream stream;
 403   stream << "display-" << connector_->id();
 404   std::string string = stream.str();
 405   size_t length = string.length();
 406   if (!name) {
 407     *size = length;
 408     return HWC2::Error::None;
 409   }
 410
 411   *size = std::min<uint32_t>(static_cast<uint32_t>(length - 1), *size);
 412   strncpy(name, string.c_str(), *size);
 413   return HWC2::Error::None;
 414 }
 415
 416 HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayRequests(int32_t *display_requests,
 417                                                       uint32_t *num_elements,
 418                                                       hwc2_layer_t *layers,
 419                                                       int32_t *layer_requests) {
 420   supported(__func__);
 421   // TODO: I think virtual display should request
 422   //      HWC2_DISPLAY_REQUEST_WRITE_CLIENT_TARGET_TO_OUTPUT here
 423   unsupported(__func__, display_requests, num_elements, layers, layer_requests);
 424   *num_elements = 0;
 425   return HWC2::Error::None;
 426 }
 427
 428 HWC2::Error DrmHwcTwo::HwcDisplay::GetDisplayType(int32_t *type) {
 429   supported(__func__);
 430   *type = static_cast<int32_t>(type_);
 431   return HWC2::Error::None;
 432 }
 433
 434 HWC2::Error DrmHwcTwo::HwcDisplay::GetDozeSupport(int32_t *support) {
 435   supported(__func__);
 436   *support = 0;
 437   return HWC2::Error::None;
 438 }
 439
 440 HWC2::Error DrmHwcTwo::HwcDisplay::GetHdrCapabilities(
 441     uint32_t *num_types, int32_t */*types*/, float */*max_luminance*/,
 442     float */*max_average_luminance*/, float */*min_luminance*/) {
 443   supported(__func__);
 444   *num_types = 0;
 445   return HWC2::Error::None;
 446 }
 447
 448 HWC2::Error DrmHwcTwo::HwcDisplay::GetReleaseFences(uint32_t *num_elements,
 449                                                     hwc2_layer_t *layers,
 450                                                     int32_t *fences) {
 451   supported(__func__);
 452   uint32_t num_layers = 0;
 453
 454   for (std::pair<const hwc2_layer_t, DrmHwcTwo::HwcLayer> &l : layers_) {
 455     ++num_layers;
 456     if (layers == NULL || fences == NULL) {
 457       continue;
 458     } else if (num_layers > *num_elements) {
 459       ALOGW("Overflow num_elements %d/%d", num_layers, *num_elements);
 460       return HWC2::Error::None;
 461     }
 462
 463     layers[num_layers - 1] = l.first;
 464     fences[num_layers - 1] = l.second.take_release_fence();
 465   }
 466   *num_elements = num_layers;
 467   return HWC2::Error::None;
 468 }
 469
 470 void DrmHwcTwo::HwcDisplay::AddFenceToRetireFence(int fd) {
 471   supported(__func__);
 472   if (fd < 0)
 473     return;
 474
 475   if (next_retire_fence_.get() >= 0) {
 476     int old_fence = next_retire_fence_.get();
 477     next_retire_fence_.Set(sync_merge("dc_retire", old_fence, fd));
 478   } else {
 479     next_retire_fence_.Set(dup(fd));
 480   }
 481 }
 482
 483 HWC2::Error DrmHwcTwo::HwcDisplay::PresentDisplay(int32_t *retire_fence) {
 484   supported(__func__);
 485   std::vector<DrmCompositionDisplayLayersMap> layers_map;
 486   layers_map.emplace_back();
 487   DrmCompositionDisplayLayersMap &map = layers_map.back();
 488
 489   map.display = static_cast<int>(handle_);
 490   map.geometry_changed = true;  // TODO: Fix this
 491
 492   // order the layers by z-order
 493   bool use_client_layer = false;
 494   uint32_t client_z_order = 0;
 495   std::map<uint32_t, DrmHwcTwo::HwcLayer *> z_map;
 496   for (std::pair<const hwc2_layer_t, DrmHwcTwo::HwcLayer> &l : layers_) {
 497     switch (l.second.validated_type()) {
 498       case HWC2::Composition::Device:
 499         z_map.emplace(std::make_pair(l.second.z_order(), &l.second));
 500         break;
 501       case HWC2::Composition::Client:
 502         // Place it at the z_order of the highest client layer
 503         use_client_layer = true;
 504         client_z_order = std::max(client_z_order, l.second.z_order());
 505         break;
 506       default:
 507         continue;
 508     }
 509   }
 510   if (use_client_layer)
 511     z_map.emplace(std::make_pair(client_z_order, &client_layer_));
 512
 513   // now that they're ordered by z, add them to the composition
 514   for (std::pair<const uint32_t, DrmHwcTwo::HwcLayer *> &l : z_map) {
 515     DrmHwcLayer layer;
 516     l.second->PopulateDrmLayer(&layer);
 517     int ret = layer.ImportBuffer(importer_.get(), gralloc_);
 518     if (ret) {
 519       ALOGE("Failed to import layer, ret=%d", ret);
 520       return HWC2::Error::NoResources;
 521     }
 522     map.layers.emplace_back(std::move(layer));
 523   }
 524   if (map.layers.empty()) {
 525     *retire_fence = -1;
 526     return HWC2::Error::None;
 527   }
 528
 529   std::unique_ptr<DrmDisplayComposition> composition =
 530       compositor_.CreateComposition();
 531   composition->Init(drm_, crtc_, importer_.get(), planner_.get(), frame_no_);
 532
 533   // TODO: Don't always assume geometry changed
 534   int ret = composition->SetLayers(map.layers.data(), map.layers.size(), true);
 535   if (ret) {
 536     ALOGE("Failed to set layers in the composition ret=%d", ret);
 537     return HWC2::Error::BadLayer;
 538   }
 539
 540   std::vector<DrmPlane *> primary_planes(primary_planes_);
 541   std::vector<DrmPlane *> overlay_planes(overlay_planes_);
 542   ret = composition->Plan(compositor_.squash_state(), &primary_planes,
 543                          &overlay_planes);
 544   if (ret) {
 545     ALOGE("Failed to plan the composition ret=%d", ret);
 546     return HWC2::Error::BadConfig;
 547   }
 548
 549   // Disable the planes we're not using
 550   for (auto i = primary_planes.begin(); i != primary_planes.end();) {
 551     composition->AddPlaneDisable(*i);
 552     i = primary_planes.erase(i);
 553   }
 554   for (auto i = overlay_planes.begin(); i != overlay_planes.end();) {
 555     composition->AddPlaneDisable(*i);
 556     i = overlay_planes.erase(i);
 557   }
 558
 559   AddFenceToRetireFence(composition->take_out_fence());
 560
 561   ret = compositor_.ApplyComposition(std::move(composition));
 562   if (ret) {
 563     ALOGE("Failed to apply the frame composition ret=%d", ret);
 564     return HWC2::Error::BadParameter;
 565   }
 566
 567   // The retire fence returned here is for the last frame, so return it and
 568   // promote the next retire fence
 569   *retire_fence = retire_fence_.Release();
 570   retire_fence_ = std::move(next_retire_fence_);
 571
 572   ++frame_no_;
 573   return HWC2::Error::None;
 574 }
 575
 576 HWC2::Error DrmHwcTwo::HwcDisplay::SetActiveConfig(hwc2_config_t config) {
 577   supported(__func__);
 578   auto mode =
 579       std::find_if(connector_->modes().begin(), connector_->modes().end(),
 580                    [config](DrmMode const &m) { return m.id() == config; });
 581   if (mode == connector_->modes().end()) {
 582     ALOGE("Could not find active mode for %d", config);
 583     return HWC2::Error::BadConfig;
 584   }
 585
 586   std::unique_ptr<DrmDisplayComposition> composition =
 587       compositor_.CreateComposition();
 588   composition->Init(drm_, crtc_, importer_.get(), planner_.get(), frame_no_);
 589   int ret = composition->SetDisplayMode(*mode);
 590   ret = compositor_.ApplyComposition(std::move(composition));
 591   if (ret) {
 592     ALOGE("Failed to queue dpms composition on %d", ret);
 593     return HWC2::Error::BadConfig;
 594   }
 595   if (connector_->active_mode().id() == 0)
 596     connector_->set_active_mode(*mode);
 597
 598   // Setup the client layer's dimensions
 599   hwc_rect_t display_frame = {.left = 0,
 600                               .top = 0,
 601                               .right = static_cast<int>(mode->h_display()),
 602                               .bottom = static_cast<int>(mode->v_display())};
 603   client_layer_.SetLayerDisplayFrame(display_frame);
 604   hwc_frect_t source_crop = {.left = 0.0f,
 605                              .top = 0.0f,
 606                              .right = mode->h_display() + 0.0f,
 607                              .bottom = mode->v_display() + 0.0f};
 608   client_layer_.SetLayerSourceCrop(source_crop);
 609
 610   return HWC2::Error::None;
 611 }
 612
 613 HWC2::Error DrmHwcTwo::HwcDisplay::SetClientTarget(buffer_handle_t target,
 614                                                    int32_t acquire_fence,
 615                                                    int32_t dataspace,
 616                                                    hwc_region_t /*damage*/) {
 617   supported(__func__);
 618   UniqueFd uf(acquire_fence);
 619
 620   client_layer_.set_buffer(target);
 621   client_layer_.set_acquire_fence(uf.get());
 622   client_layer_.SetLayerDataspace(dataspace);
 623   return HWC2::Error::None;
 624 }
 625
 626 HWC2::Error DrmHwcTwo::HwcDisplay::SetColorMode(int32_t mode) {
 627   supported(__func__);
 628
 629   if (mode != HAL_COLOR_MODE_NATIVE)
 630     return HWC2::Error::Unsupported;
 631
 632   color_mode_ = mode;
 633   return HWC2::Error::None;
 634 }
 635
 636 HWC2::Error DrmHwcTwo::HwcDisplay::SetColorTransform(const float *matrix,
 637                                                      int32_t hint) {
 638   supported(__func__);
 639   // TODO: Force client composition if we get this
 640   return unsupported(__func__, matrix, hint);
 641 }
 642
 643 HWC2::Error DrmHwcTwo::HwcDisplay::SetOutputBuffer(buffer_handle_t buffer,
 644                                                    int32_t release_fence) {
 645   supported(__func__);
 646   // TODO: Need virtual display support
 647   return unsupported(__func__, buffer, release_fence);
 648 }
 649
 650 HWC2::Error DrmHwcTwo::HwcDisplay::SetPowerMode(int32_t mode_in) {
 651   supported(__func__);
 652   uint64_t dpms_value = 0;
 653   auto mode = static_cast<HWC2::PowerMode>(mode_in);
 654   switch (mode) {
 655     case HWC2::PowerMode::Off:
 656       dpms_value = DRM_MODE_DPMS_OFF;
 657       break;
 658     case HWC2::PowerMode::On:
 659       dpms_value = DRM_MODE_DPMS_ON;
 660       break;
 661     default:
 662       ALOGI("Power mode %d is unsupported\n", mode);
 663       return HWC2::Error::Unsupported;
 664   };
 665
 666   std::unique_ptr<DrmDisplayComposition> composition =
 667       compositor_.CreateComposition();
 668   composition->Init(drm_, crtc_, importer_.get(), planner_.get(), frame_no_);
 669   composition->SetDpmsMode(dpms_value);
 670   int ret = compositor_.ApplyComposition(std::move(composition));
 671   if (ret) {
 672     ALOGE("Failed to apply the dpms composition ret=%d", ret);
 673     return HWC2::Error::BadParameter;
 674   }
 675   return HWC2::Error::None;
 676 }
 677
 678 HWC2::Error DrmHwcTwo::HwcDisplay::SetVsyncEnabled(int32_t enabled) {
 679   supported(__func__);
 680   vsync_worker_.VSyncControl(enabled);
 681   return HWC2::Error::None;
 682 }
 683
 684 HWC2::Error DrmHwcTwo::HwcDisplay::ValidateDisplay(uint32_t *num_types,
 685                                                    uint32_t *num_requests) {
 686   supported(__func__);
 687   *num_types = 0;
 688   *num_requests = 0;
 689   for (std::pair<const hwc2_layer_t, DrmHwcTwo::HwcLayer> &l : layers_) {
 690     DrmHwcTwo::HwcLayer &layer = l.second;
 691     switch (layer.sf_type()) {
 692       case HWC2::Composition::SolidColor:
 693       case HWC2::Composition::Cursor:
 694       case HWC2::Composition::Sideband:
 695         layer.set_validated_type(HWC2::Composition::Client);
 696         ++*num_types;
 697         break;
 698       case HWC2::Composition::Device:
 699         if (!compositor_.uses_GL()) {
 700           layer.set_validated_type(HWC2::Composition::Client);
 701           ++*num_types;
 702           break;
 703         }
 704         /* fall through */
 705       default:
 706         layer.set_validated_type(layer.sf_type());
 707         break;
 708     }
 709   }
 710   return *num_types ? HWC2::Error::HasChanges : HWC2::Error::None;
 711 }
 712
 713 HWC2::Error DrmHwcTwo::HwcLayer::SetCursorPosition(int32_t x, int32_t y) {
 714   supported(__func__);
 715   cursor_x_ = x;
 716   cursor_y_ = y;
 717   return HWC2::Error::None;
 718 }
 719
 720 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerBlendMode(int32_t mode) {
 721   supported(__func__);
 722   blending_ = static_cast<HWC2::BlendMode>(mode);
 723   return HWC2::Error::None;
 724 }
 725
 726 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerBuffer(buffer_handle_t buffer,
 727                                                 int32_t acquire_fence) {
 728   supported(__func__);
 729   UniqueFd uf(acquire_fence);
 730
 731   // The buffer and acquire_fence are handled elsewhere
 732   if (sf_type_ == HWC2::Composition::Client ||
 733       sf_type_ == HWC2::Composition::Sideband ||
 734       sf_type_ == HWC2::Composition::SolidColor)
 735     return HWC2::Error::None;
 736
 737   set_buffer(buffer);
 738   set_acquire_fence(uf.get());
 739   return HWC2::Error::None;
 740 }
 741
 742 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerColor(hwc_color_t color) {
 743   // TODO: Punt to client composition here?
 744   return unsupported(__func__, color);
 745 }
 746
 747 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerCompositionType(int32_t type) {
 748   sf_type_ = static_cast<HWC2::Composition>(type);
 749   return HWC2::Error::None;
 750 }
 751
 752 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerDataspace(int32_t dataspace) {
 753   supported(__func__);
 754   dataspace_ = static_cast<android_dataspace_t>(dataspace);
 755   return HWC2::Error::None;
 756 }
 757
 758 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerDisplayFrame(hwc_rect_t frame) {
 759   supported(__func__);
 760   display_frame_ = frame;
 761   return HWC2::Error::None;
 762 }
 763
 764 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerPlaneAlpha(float alpha) {
 765   supported(__func__);
 766   alpha_ = alpha;
 767   return HWC2::Error::None;
 768 }
 769
 770 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerSidebandStream(
 771     const native_handle_t *stream) {
 772   supported(__func__);
 773   // TODO: We don't support sideband
 774   return unsupported(__func__, stream);
 775 }
 776
 777 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerSourceCrop(hwc_frect_t crop) {
 778   supported(__func__);
 779   source_crop_ = crop;
 780   return HWC2::Error::None;
 781 }
 782
 783 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerSurfaceDamage(hwc_region_t damage) {
 784   supported(__func__);
 785   // TODO: We don't use surface damage, marking as unsupported
 786   unsupported(__func__, damage);
 787   return HWC2::Error::None;
 788 }
 789
 790 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerTransform(int32_t transform) {
 791   supported(__func__);
 792   transform_ = static_cast<HWC2::Transform>(transform);
 793   return HWC2::Error::None;
 794 }
 795
 796 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerVisibleRegion(hwc_region_t visible) {
 797   supported(__func__);
 798   // TODO: We don't use this information, marking as unsupported
 799   unsupported(__func__, visible);
 800   return HWC2::Error::None;
 801 }
 802
 803 HWC2::Error DrmHwcTwo::HwcLayer::SetLayerZOrder(uint32_t order) {
 804   supported(__func__);
 805   z_order_ = order;
 806   return HWC2::Error::None;
 807 }
 808
 809 void DrmHwcTwo::HwcLayer::PopulateDrmLayer(DrmHwcLayer *layer) {
 810   supported(__func__);
 811   switch (blending_) {
 812     case HWC2::BlendMode::None:
 813       layer->blending = DrmHwcBlending::kNone;
 814       break;
 815     case HWC2::BlendMode::Premultiplied:
 816       layer->blending = DrmHwcBlending::kPreMult;
 817       break;
 818     case HWC2::BlendMode::Coverage:
 819       layer->blending = DrmHwcBlending::kCoverage;
 820       break;
 821     default:
 822       ALOGE("Unknown blending mode b=%d", blending_);
 823       layer->blending = DrmHwcBlending::kNone;
 824       break;
 825   }
 826
 827   OutputFd release_fence = release_fence_output();
 828
 829   layer->sf_handle = buffer_;
 830   layer->acquire_fence = acquire_fence_.Release();
 831   layer->release_fence = std::move(release_fence);
 832   layer->SetDisplayFrame(display_frame_);
 833   layer->alpha = static_cast<uint8_t>(255.0f * alpha_ + 0.5f);
 834   layer->SetSourceCrop(source_crop_);
 835   layer->SetTransform(static_cast<int32_t>(transform_));
 836 }
 837
 838 // static
 839 int DrmHwcTwo::HookDevClose(hw_device_t * /*dev*/) {
 840   unsupported(__func__);
 841   return 0;
 842 }
 843
 844 // static
 845 void DrmHwcTwo::HookDevGetCapabilities(hwc2_device_t * /*dev*/,
 846                                        uint32_t *out_count,
 847                                        int32_t * /*out_capabilities*/) {
 848   supported(__func__);
 849   *out_count = 0;
 850 }
 851
 852 // static
 853 hwc2_function_pointer_t DrmHwcTwo::HookDevGetFunction(
 854     struct hwc2_device * /*dev*/, int32_t descriptor) {
 855   supported(__func__);
 856   auto func = static_cast<HWC2::FunctionDescriptor>(descriptor);
 857   switch (func) {
 858     // Device functions
 859     case HWC2::FunctionDescriptor::CreateVirtualDisplay:
 860       return ToHook<HWC2_PFN_CREATE_VIRTUAL_DISPLAY>(
 861           DeviceHook<int32_t, decltype(&DrmHwcTwo::CreateVirtualDisplay),
 862                      &DrmHwcTwo::CreateVirtualDisplay, uint32_t, uint32_t,
 863                      int32_t*, hwc2_display_t *>);
 864     case HWC2::FunctionDescriptor::DestroyVirtualDisplay:
 865       return ToHook<HWC2_PFN_DESTROY_VIRTUAL_DISPLAY>(
 866           DeviceHook<int32_t, decltype(&DrmHwcTwo::DestroyVirtualDisplay),
 867                      &DrmHwcTwo::DestroyVirtualDisplay, hwc2_display_t>);
 868     case HWC2::FunctionDescriptor::Dump:
 869       return ToHook<HWC2_PFN_DUMP>(
 870           DeviceHook<void, decltype(&DrmHwcTwo::Dump), &DrmHwcTwo::Dump,
 871                      uint32_t *, char *>);
 872     case HWC2::FunctionDescriptor::GetMaxVirtualDisplayCount:
 873       return ToHook<HWC2_PFN_GET_MAX_VIRTUAL_DISPLAY_COUNT>(
 874           DeviceHook<uint32_t, decltype(&DrmHwcTwo::GetMaxVirtualDisplayCount),
 875                      &DrmHwcTwo::GetMaxVirtualDisplayCount>);
 876     case HWC2::FunctionDescriptor::RegisterCallback:
 877       return ToHook<HWC2_PFN_REGISTER_CALLBACK>(
 878           DeviceHook<int32_t, decltype(&DrmHwcTwo::RegisterCallback),
 879                      &DrmHwcTwo::RegisterCallback, int32_t,
 880                      hwc2_callback_data_t, hwc2_function_pointer_t>);
 881
 882     // Display functions
 883     case HWC2::FunctionDescriptor::AcceptDisplayChanges:
 884       return ToHook<HWC2_PFN_ACCEPT_DISPLAY_CHANGES>(
 885           DisplayHook<decltype(&HwcDisplay::AcceptDisplayChanges),
 886                       &HwcDisplay::AcceptDisplayChanges>);
 887     case HWC2::FunctionDescriptor::CreateLayer:
 888       return ToHook<HWC2_PFN_CREATE_LAYER>(
 889           DisplayHook<decltype(&HwcDisplay::CreateLayer),
 890                       &HwcDisplay::CreateLayer, hwc2_layer_t *>);
 891     case HWC2::FunctionDescriptor::DestroyLayer:
 892       return ToHook<HWC2_PFN_DESTROY_LAYER>(
 893           DisplayHook<decltype(&HwcDisplay::DestroyLayer),
 894                       &HwcDisplay::DestroyLayer, hwc2_layer_t>);
 895     case HWC2::FunctionDescriptor::GetActiveConfig:
 896       return ToHook<HWC2_PFN_GET_ACTIVE_CONFIG>(
 897           DisplayHook<decltype(&HwcDisplay::GetActiveConfig),
 898                       &HwcDisplay::GetActiveConfig, hwc2_config_t *>);
 899     case HWC2::FunctionDescriptor::GetChangedCompositionTypes:
 900       return ToHook<HWC2_PFN_GET_CHANGED_COMPOSITION_TYPES>(
 901           DisplayHook<decltype(&HwcDisplay::GetChangedCompositionTypes),
 902                       &HwcDisplay::GetChangedCompositionTypes, uint32_t *,
 903                       hwc2_layer_t *, int32_t *>);
 904     case HWC2::FunctionDescriptor::GetClientTargetSupport:
 905       return ToHook<HWC2_PFN_GET_CLIENT_TARGET_SUPPORT>(
 906           DisplayHook<decltype(&HwcDisplay::GetClientTargetSupport),
 907                       &HwcDisplay::GetClientTargetSupport, uint32_t, uint32_t,
 908                       int32_t, int32_t>);
 909     case HWC2::FunctionDescriptor::GetColorModes:
 910       return ToHook<HWC2_PFN_GET_COLOR_MODES>(
 911           DisplayHook<decltype(&HwcDisplay::GetColorModes),
 912                       &HwcDisplay::GetColorModes, uint32_t *, int32_t *>);
 913     case HWC2::FunctionDescriptor::GetDisplayAttribute:
 914       return ToHook<HWC2_PFN_GET_DISPLAY_ATTRIBUTE>(DisplayHook<
 915           decltype(&HwcDisplay::GetDisplayAttribute),
 916           &HwcDisplay::GetDisplayAttribute, hwc2_config_t, int32_t, int32_t *>);
 917     case HWC2::FunctionDescriptor::GetDisplayConfigs:
 918       return ToHook<HWC2_PFN_GET_DISPLAY_CONFIGS>(DisplayHook<
 919           decltype(&HwcDisplay::GetDisplayConfigs),
 920           &HwcDisplay::GetDisplayConfigs, uint32_t *, hwc2_config_t *>);
 921     case HWC2::FunctionDescriptor::GetDisplayName:
 922       return ToHook<HWC2_PFN_GET_DISPLAY_NAME>(
 923           DisplayHook<decltype(&HwcDisplay::GetDisplayName),
 924                       &HwcDisplay::GetDisplayName, uint32_t *, char *>);
 925     case HWC2::FunctionDescriptor::GetDisplayRequests:
 926       return ToHook<HWC2_PFN_GET_DISPLAY_REQUESTS>(
 927           DisplayHook<decltype(&HwcDisplay::GetDisplayRequests),
 928                       &HwcDisplay::GetDisplayRequests, int32_t *, uint32_t *,
 929                       hwc2_layer_t *, int32_t *>);
 930     case HWC2::FunctionDescriptor::GetDisplayType:
 931       return ToHook<HWC2_PFN_GET_DISPLAY_TYPE>(
 932           DisplayHook<decltype(&HwcDisplay::GetDisplayType),
 933                       &HwcDisplay::GetDisplayType, int32_t *>);
 934     case HWC2::FunctionDescriptor::GetDozeSupport:
 935       return ToHook<HWC2_PFN_GET_DOZE_SUPPORT>(
 936           DisplayHook<decltype(&HwcDisplay::GetDozeSupport),
 937                       &HwcDisplay::GetDozeSupport, int32_t *>);
 938     case HWC2::FunctionDescriptor::GetHdrCapabilities:
 939       return ToHook<HWC2_PFN_GET_HDR_CAPABILITIES>(
 940           DisplayHook<decltype(&HwcDisplay::GetHdrCapabilities),
 941                       &HwcDisplay::GetHdrCapabilities, uint32_t *, int32_t *,
 942                       float *, float *, float *>);
 943     case HWC2::FunctionDescriptor::GetReleaseFences:
 944       return ToHook<HWC2_PFN_GET_RELEASE_FENCES>(
 945           DisplayHook<decltype(&HwcDisplay::GetReleaseFences),
 946                       &HwcDisplay::GetReleaseFences, uint32_t *, hwc2_layer_t *,
 947                       int32_t *>);
 948     case HWC2::FunctionDescriptor::PresentDisplay:
 949       return ToHook<HWC2_PFN_PRESENT_DISPLAY>(
 950           DisplayHook<decltype(&HwcDisplay::PresentDisplay),
 951                       &HwcDisplay::PresentDisplay, int32_t *>);
 952     case HWC2::FunctionDescriptor::SetActiveConfig:
 953       return ToHook<HWC2_PFN_SET_ACTIVE_CONFIG>(
 954           DisplayHook<decltype(&HwcDisplay::SetActiveConfig),
 955                       &HwcDisplay::SetActiveConfig, hwc2_config_t>);
 956     case HWC2::FunctionDescriptor::SetClientTarget:
 957       return ToHook<HWC2_PFN_SET_CLIENT_TARGET>(DisplayHook<
 958           decltype(&HwcDisplay::SetClientTarget), &HwcDisplay::SetClientTarget,
 959           buffer_handle_t, int32_t, int32_t, hwc_region_t>);
 960     case HWC2::FunctionDescriptor::SetColorMode:
 961       return ToHook<HWC2_PFN_SET_COLOR_MODE>(
 962           DisplayHook<decltype(&HwcDisplay::SetColorMode),
 963                       &HwcDisplay::SetColorMode, int32_t>);
 964     case HWC2::FunctionDescriptor::SetColorTransform:
 965       return ToHook<HWC2_PFN_SET_COLOR_TRANSFORM>(
 966           DisplayHook<decltype(&HwcDisplay::SetColorTransform),
 967                       &HwcDisplay::SetColorTransform, const float *, int32_t>);
 968     case HWC2::FunctionDescriptor::SetOutputBuffer:
 969       return ToHook<HWC2_PFN_SET_OUTPUT_BUFFER>(
 970           DisplayHook<decltype(&HwcDisplay::SetOutputBuffer),
 971                       &HwcDisplay::SetOutputBuffer, buffer_handle_t, int32_t>);
 972     case HWC2::FunctionDescriptor::SetPowerMode:
 973       return ToHook<HWC2_PFN_SET_POWER_MODE>(
 974           DisplayHook<decltype(&HwcDisplay::SetPowerMode),
 975                       &HwcDisplay::SetPowerMode, int32_t>);
 976     case HWC2::FunctionDescriptor::SetVsyncEnabled:
 977       return ToHook<HWC2_PFN_SET_VSYNC_ENABLED>(
 978           DisplayHook<decltype(&HwcDisplay::SetVsyncEnabled),
 979                       &HwcDisplay::SetVsyncEnabled, int32_t>);
 980     case HWC2::FunctionDescriptor::ValidateDisplay:
 981       return ToHook<HWC2_PFN_VALIDATE_DISPLAY>(
 982           DisplayHook<decltype(&HwcDisplay::ValidateDisplay),
 983                       &HwcDisplay::ValidateDisplay, uint32_t *, uint32_t *>);
 984
 985     // Layer functions
 986     case HWC2::FunctionDescriptor::SetCursorPosition:
 987       return ToHook<HWC2_PFN_SET_CURSOR_POSITION>(
 988           LayerHook<decltype(&HwcLayer::SetCursorPosition),
 989                     &HwcLayer::SetCursorPosition, int32_t, int32_t>);
 990     case HWC2::FunctionDescriptor::SetLayerBlendMode:
 991       return ToHook<HWC2_PFN_SET_LAYER_BLEND_MODE>(
 992           LayerHook<decltype(&HwcLayer::SetLayerBlendMode),
 993                     &HwcLayer::SetLayerBlendMode, int32_t>);
 994     case HWC2::FunctionDescriptor::SetLayerBuffer:
 995       return ToHook<HWC2_PFN_SET_LAYER_BUFFER>(
 996           LayerHook<decltype(&HwcLayer::SetLayerBuffer),
 997                     &HwcLayer::SetLayerBuffer, buffer_handle_t, int32_t>);
 998     case HWC2::FunctionDescriptor::SetLayerColor:
 999       return ToHook<HWC2_PFN_SET_LAYER_COLOR>(
1000           LayerHook<decltype(&HwcLayer::SetLayerColor),
1001                     &HwcLayer::SetLayerColor, hwc_color_t>);
1002     case HWC2::FunctionDescriptor::SetLayerCompositionType:
1003       return ToHook<HWC2_PFN_SET_LAYER_COMPOSITION_TYPE>(
1004           LayerHook<decltype(&HwcLayer::SetLayerCompositionType),
1005                     &HwcLayer::SetLayerCompositionType, int32_t>);
1006     case HWC2::FunctionDescriptor::SetLayerDataspace:
1007       return ToHook<HWC2_PFN_SET_LAYER_DATASPACE>(
1008           LayerHook<decltype(&HwcLayer::SetLayerDataspace),
1009                     &HwcLayer::SetLayerDataspace, int32_t>);
1010     case HWC2::FunctionDescriptor::SetLayerDisplayFrame:
1011       return ToHook<HWC2_PFN_SET_LAYER_DISPLAY_FRAME>(
1012           LayerHook<decltype(&HwcLayer::SetLayerDisplayFrame),
1013                     &HwcLayer::SetLayerDisplayFrame, hwc_rect_t>);
1014     case HWC2::FunctionDescriptor::SetLayerPlaneAlpha:
1015       return ToHook<HWC2_PFN_SET_LAYER_PLANE_ALPHA>(
1016           LayerHook<decltype(&HwcLayer::SetLayerPlaneAlpha),
1017                     &HwcLayer::SetLayerPlaneAlpha, float>);
1018     case HWC2::FunctionDescriptor::SetLayerSidebandStream:
1019       return ToHook<HWC2_PFN_SET_LAYER_SIDEBAND_STREAM>(LayerHook<
1020           decltype(&HwcLayer::SetLayerSidebandStream),
1021           &HwcLayer::SetLayerSidebandStream, const native_handle_t *>);
1022     case HWC2::FunctionDescriptor::SetLayerSourceCrop:
1023       return ToHook<HWC2_PFN_SET_LAYER_SOURCE_CROP>(
1024           LayerHook<decltype(&HwcLayer::SetLayerSourceCrop),
1025                     &HwcLayer::SetLayerSourceCrop, hwc_frect_t>);
1026     case HWC2::FunctionDescriptor::SetLayerSurfaceDamage:
1027       return ToHook<HWC2_PFN_SET_LAYER_SURFACE_DAMAGE>(
1028           LayerHook<decltype(&HwcLayer::SetLayerSurfaceDamage),
1029                     &HwcLayer::SetLayerSurfaceDamage, hwc_region_t>);
1030     case HWC2::FunctionDescriptor::SetLayerTransform:
1031       return ToHook<HWC2_PFN_SET_LAYER_TRANSFORM>(
1032           LayerHook<decltype(&HwcLayer::SetLayerTransform),
1033                     &HwcLayer::SetLayerTransform, int32_t>);
1034     case HWC2::FunctionDescriptor::SetLayerVisibleRegion:
1035       return ToHook<HWC2_PFN_SET_LAYER_VISIBLE_REGION>(
1036           LayerHook<decltype(&HwcLayer::SetLayerVisibleRegion),
1037                     &HwcLayer::SetLayerVisibleRegion, hwc_region_t>);
1038     case HWC2::FunctionDescriptor::SetLayerZOrder:
1039       return ToHook<HWC2_PFN_SET_LAYER_Z_ORDER>(
1040           LayerHook<decltype(&HwcLayer::SetLayerZOrder),
1041                     &HwcLayer::SetLayerZOrder, uint32_t>);
1042     case HWC2::FunctionDescriptor::Invalid:
1043     default:
1044       return NULL;
1045   }
1046 }
1047
1048 // static
1049 int DrmHwcTwo::HookDevOpen(const struct hw_module_t *module, const char *name,
1050                            struct hw_device_t **dev) {
1051   supported(__func__);
1052   if (strcmp(name, HWC_HARDWARE_COMPOSER)) {
1053     ALOGE("Invalid module name- %s", name);
1054     return -EINVAL;
1055   }
1056
1057   std::unique_ptr<DrmHwcTwo> ctx(new DrmHwcTwo());
1058   if (!ctx) {
1059     ALOGE("Failed to allocate DrmHwcTwo");
1060     return -ENOMEM;
1061   }
1062
1063   HWC2::Error err = ctx->Init();
1064   if (err != HWC2::Error::None) {
1065     ALOGE("Failed to initialize DrmHwcTwo err=%d\n", err);
1066     return -EINVAL;
1067   }
1068
1069   ctx->common.module = const_cast<hw_module_t *>(module);
1070   *dev = &ctx->common;
1071   ctx.release();
1072   return 0;
1073 }
1074 }
1075
1076 static struct hw_module_methods_t hwc2_module_methods = {
1077     .open = android::DrmHwcTwo::HookDevOpen,
1078 };
1079
1080 hw_module_t HAL_MODULE_INFO_SYM = {
1081     .tag = HARDWARE_MODULE_TAG,
1082     .module_api_version = HARDWARE_MODULE_API_VERSION(2, 0),
1083     .id = HWC_HARDWARE_MODULE_ID,
1084     .name = "DrmHwcTwo module",
1085     .author = "The Android Open Source Project",
1086     .methods = &hwc2_module_methods,
1087     .dso = NULL,
1088     .reserved = {0},
1089 };