hwc3/DrmHwcThree.cpp

/*
 * Copyright (C) 2024 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "DrmHwcThree.h"

#include <cinttypes>

#include "Utils.h"
#include "aidl/android/hardware/graphics/common/Dataspace.h"

namespace aidl::android::hardware::graphics::composer3::impl {

using ::android::HwcDisplay;

// NOLINTNEXTLINE(bugprone-exception-escape)
DrmHwcThree::~DrmHwcThree() {
  std::vector<uint64_t> display_ids;
  display_ids.reserve(Displays().size());
  for (auto& [display_id, display] : Displays()) {
    display_ids.push_back(display_id);
  }

  for (auto display_id : display_ids) {
    RemoveAndDestroyDisplay(display_id);
  }
}

void DrmHwcThree::Init(std::shared_ptr<IComposerCallback> callback) {
  composer_callback_ = std::move(callback);
  GetResMan().Init();
}

void DrmHwcThree::SendVsyncPeriodTimingChangedEventToClient(
    uint64_t display_id, int64_t timestamp) const {
  VsyncPeriodChangeTimeline timeline;
  timeline.newVsyncAppliedTimeNanos = timestamp;
  timeline.refreshRequired = false;
  timeline.refreshTimeNanos = 0;

  composer_callback_->onVsyncPeriodTimingChanged(static_cast<int64_t>(
                                                     display_id),
                                                 timeline);
}

void DrmHwcThree::SendRefreshEventToClient(uint64_t display_id) {
  composer_resources_->SetDisplayMustValidateState(display_id, true);
  composer_callback_->onRefresh(static_cast<int64_t>(display_id));
}

void DrmHwcThree::SendVsyncEventToClient(uint64_t display_id, int64_t timestamp,
                                         uint32_t vsync_period) const {
  composer_callback_->onVsync(static_cast<int64_t>(display_id), timestamp,
                              static_cast<int32_t>(vsync_period));
}

void DrmHwcThree::SendHotplugEventToClient(hwc2_display_t display_id,
                                           bool connected) {
  HandleDisplayHotplugEvent(static_cast<uint64_t>(display_id), connected);
  composer_callback_->onHotplug(static_cast<int64_t>(display_id), connected);
}

void DrmHwcThree::RemoveAndDestroyDisplay(uint64_t display_id) {
  DEBUG_FUNC();
  HwcDisplay* display = GetDisplay(display_id);
  if (display == nullptr) {
    return;
  }

  display->SetPowerMode(static_cast<int32_t>(HWC2::PowerMode::Off));
  display->Deinit();

  composer_resources_->RemoveDisplay(static_cast<int64_t>(display_id));
  Displays().erase(display_id);
}

void DrmHwcThree::CleanDisplayResources(uint64_t display_id) {
  DEBUG_FUNC();
  HwcDisplay* display = GetDisplay(display_id);
  if (display == nullptr) {
    return;
  }

  display->SetPowerMode(static_cast<int32_t>(PowerMode::OFF));

  size_t cache_size = 0;
  auto err = composer_resources_->GetDisplayClientTargetCacheSize(display_id,
                                                                  &cache_size);
  if (err != hwc3::Error::kNone) {
    ALOGE("%s: Could not clear target buffer cache for display: %" PRIu64,
          __func__, display_id);
    return;
  }

  for (size_t slot = 0; slot < cache_size; slot++) {
    buffer_handle_t buffer_handle = nullptr;
    auto buf_releaser = ComposerResources::CreateResourceReleaser(true);

    Buffer buf{};
    buf.slot = static_cast<int32_t>(slot);
    err = composer_resources_->GetDisplayClientTarget(display_id, buf,
                                                      &buffer_handle,
                                                      buf_releaser.get());
    if (err != hwc3::Error::kNone) {
      continue;
    }

    err = Hwc2toHwc3Error(
        display->SetClientTarget(buffer_handle, -1,
                                 static_cast<int32_t>(
                                     common::Dataspace::UNKNOWN),
                                 {}));
    if (err != hwc3::Error::kNone) {
      ALOGE(
          "%s: Could not clear slot %zu of the target buffer cache for "
          "display %" PRIu64,
          __func__, slot, display_id);
    }
  }
}

void DrmHwcThree::HandleDisplayHotplugEvent(uint64_t display_id,
                                            bool connected) {
  DEBUG_FUNC();
  if (!connected) {
    composer_resources_->RemoveDisplay(display_id);
    return;
  }

  if (composer_resources_->HasDisplay(display_id)) {
    /* Cleanup existing display resources */
    CleanDisplayResources(display_id);
    composer_resources_->RemoveDisplay(display_id);
  }
  composer_resources_->AddPhysicalDisplay(display_id);
}

}  // namespace aidl::android::hardware::graphics::composer3::impl