1/*
2 * Copyright (C) 2015 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 LOG_TAG "hwc-drm-compositor-worker"
18
19#include "drmdisplaycompositor.h"
20#include "drmcompositorworker.h"
21#include "worker.h"
22
23#include <stdlib.h>
24
25#include <cutils/log.h>
26#include <hardware/hardware.h>
27
28namespace android {
29
30static const int64_t kSquashWait = 500000000LL;
31
32DrmCompositorWorker::DrmCompositorWorker(DrmDisplayCompositor *compositor)
33    : Worker("drm-compositor", HAL_PRIORITY_URGENT_DISPLAY),
34      compositor_(compositor) {
35}
36
37DrmCompositorWorker::~DrmCompositorWorker() {
38}
39
40int DrmCompositorWorker::Init() {
41  return InitWorker();
42}
43
44void DrmCompositorWorker::Routine() {
45  int ret;
46  if (!compositor_->HaveQueuedComposites()) {
47    ret = Lock();
48    if (ret) {
49      ALOGE("Failed to lock worker, %d", ret);
50      return;
51    }
52
53    // Only use a timeout if we didn't do a SquashAll last time. This will
54    // prevent wait_ret == -ETIMEDOUT which would trigger a SquashAll and be a
55    // pointless drain on resources.
56    int wait_ret = did_squash_all_ ? WaitForSignalOrExitLocked()
57                                   : WaitForSignalOrExitLocked(kSquashWait);
58
59    ret = Unlock();
60    if (ret) {
61      ALOGE("Failed to unlock worker, %d", ret);
62      return;
63    }
64
65    switch (wait_ret) {
66      case 0:
67        break;
68      case -EINTR:
69        return;
70      case -ETIMEDOUT:
71        ret = compositor_->SquashAll();
72        if (ret)
73          ALOGE("Failed to squash all %d", ret);
74        did_squash_all_ = true;
75        return;
76      default:
77        ALOGE("Failed to wait for signal, %d", wait_ret);
78        return;
79    }
80  }
81
82  ret = compositor_->Composite();
83  if (ret)
84    ALOGE("Failed to composite! %d", ret);
85  did_squash_all_ = false;
86}
87}
88