1 /*
2  * Copyright (C) 2017 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 #include "chre/platform/power_control_manager.h"
18 
19 #include "chre/platform/slpi/power_control_util.h"
20 #include "chre/platform/slpi/see/island_vote_client.h"
21 #include "chre/platform/system_time.h"
22 #include "chre/util/lock_guard.h"
23 
24 namespace chre {
25 
26 PowerControlManagerBase::PowerControlManagerBase() : mHostIsAwake(true) {
27 #ifdef CHRE_THREAD_UTIL_ENABLED
28   sns_client_create_thread_utilization_client(&mThreadUtilClient);
29 #endif  // CHRE_THREAD_UTIL_ENABLED
30 }
31 
32 PowerControlManagerBase::~PowerControlManagerBase() {
33 #ifdef CHRE_THREAD_UTIL_ENABLED
34   sns_client_remove_thread_utilization_client(mThreadUtilClient);
35 #endif  // CHRE_THREAD_UTIL_ENABLED
36 }
37 
38 bool PowerControlManagerBase::voteBigImage(bool bigImage) {
39   return IslandVoteClientSingleton::get()->voteBigImage(bigImage);
40 }
41 
42 void PowerControlManagerBase::onHostWakeSuspendEvent(bool awake) {
43   if (mHostIsAwake != awake) {
44     mHostIsAwake = awake;
45 
46     if (!awake) {
47       EventLoopManagerSingleton::get()
48           ->getHostCommsManager()
49           .resetBlameForNanoappHostWakeup();
50     }
51 
52     EventLoopManagerSingleton::get()->getEventLoop().postEventOrDie(
53         mHostIsAwake ? CHRE_EVENT_HOST_AWAKE : CHRE_EVENT_HOST_ASLEEP,
54         nullptr /* eventData */, nullptr /* freeCallback */);
55 
56 #ifdef CHRE_AUDIO_SUPPORT_ENABLED
57     if (awake) {
58       auto callback = [](uint16_t /* eventType */, void * /* eventData*/) {
59         EventLoopManagerSingleton::get()
60             ->getAudioRequestManager()
61             .getPlatformAudio()
62             .onHostAwake();
63       };
64 
65       EventLoopManagerSingleton::get()->deferCallback(
66           SystemCallbackType::AudioHandleHostAwake, nullptr, callback);
67     }
68 #endif  // CHRE_AUDIO_SUPPORT_ENABLED
69   }
70 }
71 
72 void PowerControlManager::postEventLoopProcess(size_t numPendingEvents) {
73 #ifdef CHRE_THREAD_UTIL_ENABLED
74   // Although this execution point does not actually represent the start
75   // of the CHRE thread's activity, we only care about cases where the
76   // CHRE's event queue is highly backlogged for voting higher clock rates.
77   if (mIsThreadIdle && numPendingEvents != 0) {
78     sns_client_thread_utilization_start(mThreadUtilClient);
79     mIsThreadIdle = false;
80   } else if (!mIsThreadIdle) {
81     // Update the time profile as frequently as possible so that clock updates
82     // are not deferred until all events are processed.
83     sns_client_thread_utilization_stop(mThreadUtilClient);
84     if (numPendingEvents != 0) {
85       sns_client_thread_utilization_start(mThreadUtilClient);
86     } else {
87       mIsThreadIdle = true;
88     }
89   }
90 #endif  // CHRE_THREAD_UTIL_ENABLED
91 
92   if (numPendingEvents == 0 && !slpiInUImage()) {
93     voteBigImage(false /* bigImage */);
94   }
95 }
96 
97 bool PowerControlManager::hostIsAwake() {
98   return mHostIsAwake;
99 }
100 
101 }  // namespace chre
102