composer/service.cpp

/*
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 * met:
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 *      notice, this list of conditions and the following disclaimer.
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 *      disclaimer in the documentation and/or other materials provided
 *      with the distribution.
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 *      contributors may be used to endorse or promote products derived
 *      from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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/* Changes from Qualcomm Innovation Center are provided under the following license:
 *
 * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
 * SPDX-License-Identifier: BSD-3-Clause-Clear
 */

#include <android-base/logging.h>
#include <android/binder_manager.h>
#include <android/binder_process.h>
#include <hidl/LegacySupport.h>

#include "DisplayConfigAIDL.h"
#include "QtiComposer.h"
#include "hwc_debugger.h"

using aidl::vendor::qti::hardware::display::config::DisplayConfigAIDL;
using android::ProcessState;
using android::sp;
using android::hardware::configureRpcThreadpool;
using android::hardware::joinRpcThreadpool;
using android::hardware::graphics::composer::V2_3::IComposer;
using vendor::qti::hardware::display::composer::V3_1::IQtiComposer;
using vendor::qti::hardware::display::composer::V3_1::implementation::QtiComposer;

int main(int, char **) {
  ALOGI("Creating Display HW Composer HAL");

  int composer_thread_count = 8;
  sdm::HWCDebugHandler::Get()->GetProperty(COMPOSER_THREAD_COUNT, &composer_thread_count);
  if (composer_thread_count < 4) {
    composer_thread_count = 4;
  } else if (composer_thread_count > 15) {
    composer_thread_count = 15;
  }
  ALOGI("composer_thread_count: %d", composer_thread_count);

  // TODO(user): double-check for SCHED_FIFO logic
  // the conventional HAL might start binder services
  ProcessState::initWithDriver("/dev/vndbinder");
  sp<ProcessState> ps(ProcessState::self());
  ps->setThreadPoolMaxThreadCount(composer_thread_count);
  ps->startThreadPool();
  ALOGI("ProcessState initialization completed");

  // same as SF main thread
  struct sched_param param = {0};
  param.sched_priority = 2;
  if (sched_setscheduler(0, SCHED_FIFO | SCHED_RESET_ON_FORK, &param) != 0) {
    ALOGE("Couldn't set SCHED_FIFO: %d", errno);
  } else {
    ALOGI("Scheduler priority settings completed");
  }

  ALOGI("Initializing QtiComposer");
  sp<IQtiComposer> composer = QtiComposer::initialize();
  if (composer == nullptr) {
    ALOGE("Initializing QtiComposer...failed!");
    return -EINVAL;
  } else {
    ALOGI("Initializing QtiComposer...done!");
  }

  ALOGI("Configuring RPC threadpool");
  configureRpcThreadpool(composer_thread_count, true /*callerWillJoin*/);
  ALOGI("Configuring RPC threadpool...done!");

  ALOGI("Registering Display HW Composer HAL as a service");
  if (composer->registerAsService() != android::OK) {
    ALOGE("Registering Display HW Composer HAL as a service...failed!");
    return -EINVAL;
  }
  ALOGI("Registering Display HW Composer HAL as a service...done!");

  ALOGI("Registering DisplayConfig AIDL as a service");
  ABinderProcess_setThreadPoolMaxThreadCount(0);
  std::shared_ptr<DisplayConfigAIDL> displayConfig = ndk::SharedRefBase::make<DisplayConfigAIDL>();
  const std::string instance = std::string() + DisplayConfigAIDL::descriptor + "/default";
  if (!displayConfig->asBinder().get()) {
    ALOGW("Display Config AIDL's binder is null");
  }

  binder_status_t status = AServiceManager_addService(displayConfig->asBinder().get(),
                                                      instance.c_str());
  if (status != STATUS_OK) {
    ALOGW("Failed to register DisplayConfig AIDL as a service (status:%d)", status);
  } else {
    ALOGI("Successfully registered DisplayConfig AIDL as a service");
  }

  ALOGI("Joining RPC threadpool...");
  ABinderProcess_joinThreadPool();

  return 0;
}