/*
 * Copyright (C) 2015 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.
 */

#define LOG_TAG "hwc-drm-compositor-worker"

#include "drmdisplaycompositor.h"
#include "drmcompositorworker.h"
#include "utils/worker.h"

#include <stdlib.h>

#include <log/log.h>
#include <hardware/hardware.h>

namespace android {

DrmCompositorWorker::DrmCompositorWorker(DrmDisplayCompositor *compositor)
    : Worker("drm-compositor", HAL_PRIORITY_URGENT_DISPLAY),
      compositor_(compositor) {
}

DrmCompositorWorker::~DrmCompositorWorker() {
}

int DrmCompositorWorker::Init() {
  bSchedFifoEnable_ = false;
  return InitWorker();
}

void DrmCompositorWorker::Routine() {
  int ret;

  // 需要将此线程设置为实时线程，为了让底层调用CPU计时器可以获得更准确的计时
  if(gIsRK3588() && bSchedFifoEnable_ == false){
    static constexpr int kFifoPriority = 2;
    struct sched_param param = {0};
    int sched_policy;
    sched_policy = SCHED_FIFO;
    param.sched_priority = kFifoPriority;

    if (sched_setscheduler(0, sched_policy, &param) != 0) {
        return;
    }
    bSchedFifoEnable_ = true;
  }


  if(!compositor_->IsSidebandMode()){
    if (!compositor_->HaveQueuedComposites()) {
      Lock();
      int wait_ret = WaitForSignalOrExitLocked(kWaitTimeOut_);
      Unlock();

      switch (wait_ret) {
        case 0:
          break;
        case -EINTR:
          return;
        //close pre-comp for static screen.
        case -ETIMEDOUT:
          kWaitTimeOut_ = kWaitTimeOut_ * 2 > 500000000LL? 500000000LL : kWaitTimeOut_ * 2;
          return;
        default:
          ALOGE("Failed to wait for signal, %d", wait_ret);
          return;
      }
    }
  }

  kWaitTimeOut_ = 2000000LL;

  ret = compositor_->Composite();
  if (ret)
    ALOGE("Failed to composite! %d", ret);
}
}