1 /*
2 * Copyright (C) 2020 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 "powerhal-libperfmgr"
18
19 #include <errno.h>
20 #include <unistd.h>
21
22 #include <cutils/sockets.h>
23 #include <log/log.h>
24
25 #include "DisplayLowPower.h"
26
27 namespace aidl {
28 namespace google {
29 namespace hardware {
30 namespace power {
31 namespace impl {
32 namespace pixel {
33
DisplayLowPower()34 DisplayLowPower::DisplayLowPower() : mFossStatus(false) {}
35
Init()36 void DisplayLowPower::Init() {
37 ConnectPpsDaemon();
38 }
39
SetDisplayLowPower(bool enable)40 void DisplayLowPower::SetDisplayLowPower(bool enable) {
41 SetFoss(enable);
42 }
43
ConnectPpsDaemon()44 void DisplayLowPower::ConnectPpsDaemon() {
45 constexpr const char kPpsDaemon[] = "pps";
46
47 mPpsSocket.reset(
48 socket_local_client(kPpsDaemon, ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM));
49 if (mPpsSocket.get() < 0) {
50 ALOGW("Connecting to PPS daemon failed (%s)", strerror(errno));
51 }
52 }
53
SendPpsCommand(const std::string_view cmd)54 int DisplayLowPower::SendPpsCommand(const std::string_view cmd) {
55 if (TEMP_FAILURE_RETRY(write(mPpsSocket.get(), cmd.data(), cmd.size())) < 0) {
56 ALOGE("Failed to send pps command '%s' over socket (%s)", cmd.data(), strerror(errno));
57 return -1;
58 }
59
60 return 0;
61 }
62
SetFoss(bool enable)63 void DisplayLowPower::SetFoss(bool enable) {
64 if (mPpsSocket.get() < 0 || mFossStatus == enable) {
65 return;
66 }
67
68 ALOGI("%s foss", (enable) ? "Enable" : "Disable");
69
70 std::string_view foss_cmd;
71 if (enable) {
72 foss_cmd = "foss:on";
73 } else {
74 foss_cmd = "foss:off";
75 }
76
77 if (!SendPpsCommand(foss_cmd)) {
78 mFossStatus = enable;
79 }
80 }
81
82 } // namespace pixel
83 } // namespace impl
84 } // namespace power
85 } // namespace hardware
86 } // namespace google
87 } // namespace aidl
88