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
28 namespace android {
29
30 static const int64_t kSquashWait = 500000000LL;
31
DrmCompositorWorker(DrmDisplayCompositor * compositor)32 DrmCompositorWorker::DrmCompositorWorker(DrmDisplayCompositor *compositor)
33 : Worker("drm-compositor", HAL_PRIORITY_URGENT_DISPLAY),
34 compositor_(compositor) {
35 }
36
~DrmCompositorWorker()37 DrmCompositorWorker::~DrmCompositorWorker() {
38 }
39
Init()40 int DrmCompositorWorker::Init() {
41 return InitWorker();
42 }
43
Routine()44 void 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