Ozone integration.

ui/ozone/platform/drm/gpu/drm_gpu_display_manager.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h"
+
+#include "ui/display/types/gamma_ramp_rgb_entry.h"
+#include "ui/ozone/common/display_util.h"
+#include "ui/ozone/platform/drm/common/drm_util.h"
+#include "ui/ozone/platform/drm/gpu/drm_device.h"
+#include "ui/ozone/platform/drm/gpu/drm_device_manager.h"
+#include "ui/ozone/platform/drm/gpu/drm_display.h"
+#include "ui/ozone/platform/drm/gpu/screen_manager.h"
+
+namespace ui {
+
+namespace {
+
+class DisplayComparator {
+ public:
+  explicit DisplayComparator(const DrmDisplay* display)
+      : drm_(display->drm()),
+        crtc_(display->crtc()),
+        connector_(display->connector()) {}
+
+  DisplayComparator(const scoped_refptr<DrmDevice>& drm,
+                    uint32_t crtc,
+                    uint32_t connector)
+      : drm_(drm), crtc_(crtc), connector_(connector) {}
+
+  bool operator()(const DrmDisplay* other) const {
+    return drm_ == other->drm() && connector_ == other->connector() &&
+           crtc_ == other->crtc();
+  }
+
+ private:
+  scoped_refptr<DrmDevice> drm_;
+  uint32_t crtc_;
+  uint32_t connector_;
+};
+
+bool FindMatchingMode(const std::vector<drmModeModeInfo> modes,
+                      const DisplayMode_Params& mode_params,
+                      drmModeModeInfo* mode) {
+  for (const drmModeModeInfo& m : modes) {
+    DisplayMode_Params params = CreateDisplayModeParams(m);
+    if (mode_params.size == params.size &&
+        mode_params.refresh_rate == params.refresh_rate &&
+        mode_params.is_interlaced == params.is_interlaced) {
+      *mode = m;
+      return true;
+    }
+  }
+
+  return false;
+}
+
+}  // namespace
+
+DrmGpuDisplayManager::DrmGpuDisplayManager(ScreenManager* screen_manager,
+                                           DrmDeviceManager* drm_device_manager)
+    : screen_manager_(screen_manager), drm_device_manager_(drm_device_manager) {
+}
+
+DrmGpuDisplayManager::~DrmGpuDisplayManager() {
+}
+
+std::vector<DisplaySnapshot_Params> DrmGpuDisplayManager::GetDisplays() {
+  ScopedVector<DrmDisplay> old_displays(displays_.Pass());
+  std::vector<DisplaySnapshot_Params> params_list;
+
+  const DrmDeviceVector& devices = drm_device_manager_->GetDrmDevices();
+  // Unique identifier used to create the display id.
+  size_t index = 0;
+  for (const auto& drm : devices) {
+    ScopedVector<HardwareDisplayControllerInfo> display_infos =
+        GetAvailableDisplayControllerInfos(drm->get_fd());
+    for (auto* display_info : display_infos) {
+      auto it = std::find_if(
+          old_displays.begin(), old_displays.end(),
+          DisplayComparator(drm, display_info->crtc()->crtc_id,
+                            display_info->connector()->connector_id));
+      if (it != old_displays.end()) {
+        displays_.push_back(*it);
+        old_displays.weak_erase(it);
+      } else {
+        displays_.push_back(new DrmDisplay(screen_manager_, drm));
+      }
+
+      params_list.push_back(displays_.back()->Update(display_info, index++));
+    }
+  }
+
+  NotifyScreenManager(displays_.get(), old_displays.get());
+  return params_list;
+}
+
+bool DrmGpuDisplayManager::TakeDisplayControl() {
+  const DrmDeviceVector& devices = drm_device_manager_->GetDrmDevices();
+  bool status = true;
+  for (const auto& drm : devices)
+    status &= drm->SetMaster();
+
+  // Roll-back any successful operation.
+  if (!status) {
+    LOG(ERROR) << "Failed to take control of the display";
+    RelinquishDisplayControl();
+  }
+
+  return status;
+}
+
+void DrmGpuDisplayManager::RelinquishDisplayControl() {
+  const DrmDeviceVector& devices = drm_device_manager_->GetDrmDevices();
+  for (const auto& drm : devices)
+    drm->DropMaster();
+}
+
+bool DrmGpuDisplayManager::ConfigureDisplay(
+    int64_t display_id,
+    const DisplayMode_Params& mode_param,
+    const gfx::Point& origin) {
+  DrmDisplay* display = FindDisplay(display_id);
+  if (!display) {
+    LOG(ERROR) << "There is no display with ID " << display_id;
+    return false;
+  }
+
+  drmModeModeInfo mode;
+  bool mode_found = FindMatchingMode(display->modes(), mode_param, &mode);
+  if (!mode_found) {
+    // If the display doesn't have the mode natively, then lookup the mode from
+    // other displays and try using it on the current display (some displays
+    // support panel fitting and they can use different modes even if the mode
+    // isn't explicitly declared).
+    for (DrmDisplay* other : displays_) {
+      mode_found = FindMatchingMode(other->modes(), mode_param, &mode);
+      if (mode_found)
+        break;
+    }
+  }
+
+  if (!mode_found) {
+    LOG(ERROR) << "Failed to find mode: size=" << mode_param.size.ToString()
+               << " is_interlaced=" << mode_param.is_interlaced
+               << " refresh_rate=" << mode_param.refresh_rate;
+    return false;
+  }
+
+  return display->Configure(&mode, origin);
+}
+
+bool DrmGpuDisplayManager::DisableDisplay(int64_t display_id) {
+  DrmDisplay* display = FindDisplay(display_id);
+  if (!display) {
+    LOG(ERROR) << "There is no display with ID " << display_id;
+    return false;
+  }
+
+  return display->Configure(nullptr, gfx::Point());
+}
+
+bool DrmGpuDisplayManager::GetHDCPState(int64_t display_id, HDCPState* state) {
+  DrmDisplay* display = FindDisplay(display_id);
+  if (!display) {
+    LOG(ERROR) << "There is no display with ID " << display_id;
+    return false;
+  }
+
+  return display->GetHDCPState(state);
+}
+
+bool DrmGpuDisplayManager::SetHDCPState(int64_t display_id, HDCPState state) {
+  DrmDisplay* display = FindDisplay(display_id);
+  if (!display) {
+    LOG(ERROR) << "There is no display with ID " << display_id;
+    return false;
+  }
+
+  return display->SetHDCPState(state);
+}
+
+void DrmGpuDisplayManager::SetGammaRamp(
+    int64_t display_id,
+    const std::vector<GammaRampRGBEntry>& lut) {
+  DrmDisplay* display = FindDisplay(display_id);
+  if (!display) {
+    LOG(ERROR) << "There is no display with ID " << display_id;
+    return;
+  }
+
+  display->SetGammaRamp(lut);
+}
+
+DrmDisplay* DrmGpuDisplayManager::FindDisplay(int64_t display_id) {
+  for (DrmDisplay* display : displays_)
+    if (display->display_id() == display_id)
+      return display;
+
+  return nullptr;
+}
+
+void DrmGpuDisplayManager::NotifyScreenManager(
+    const std::vector<DrmDisplay*>& new_displays,
+    const std::vector<DrmDisplay*>& old_displays) const {
+  for (size_t i = 0; i < old_displays.size(); ++i) {
+    const std::vector<DrmDisplay*>::const_iterator it =
+        std::find_if(new_displays.begin(), new_displays.end(),
+                     DisplayComparator(old_displays[i]));
+
+    if (it == new_displays.end()) {
+      screen_manager_->RemoveDisplayController(old_displays[i]->drm(),
+                                               old_displays[i]->crtc());
+    }
+  }
+
+  for (size_t i = 0; i < new_displays.size(); ++i) {
+    const std::vector<DrmDisplay*>::const_iterator it =
+        std::find_if(old_displays.begin(), old_displays.end(),
+                     DisplayComparator(new_displays[i]));
+
+    if (it == old_displays.end()) {
+      screen_manager_->AddDisplayController(new_displays[i]->drm(),
+                                            new_displays[i]->crtc(),
+                                            new_displays[i]->connector());
+    }
+  }
+}
+
+}  // namespace ui