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Ana Krulecb43429d2019-01-09 14:28:51 -08001/*
2 * Copyright 2019 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#pragma once
18
19#include <algorithm>
20#include <numeric>
21
Ana Krulecb43429d2019-01-09 14:28:51 -080022#include "android-base/stringprintf.h"
23
Ana Krulec4593b692019-01-11 22:07:25 -080024#include "DisplayHardware/HWComposer.h"
25#include "Scheduler/SchedulerUtils.h"
26
Ana Krulecb43429d2019-01-09 14:28:51 -080027namespace android {
28namespace scheduler {
29
30/**
31 * This class is used to encapsulate configuration for refresh rates. It holds infomation
32 * about available refresh rates on the device, and the mapping between the numbers and human
33 * readable names.
34 */
35class RefreshRateConfigs {
36public:
37 // Enum to indicate which vsync rate to run at. Power saving is intended to be the lowest
38 // (eg. when the screen is in AOD mode or off), default is the old 60Hz, and performance
39 // is the new 90Hz. Eventually we want to have a way for vendors to map these in the configs.
40 enum class RefreshRateType { POWER_SAVING, DEFAULT, PERFORMANCE };
41
42 struct RefreshRate {
43 // Type of the refresh rate.
44 RefreshRateType type;
45 // This config ID corresponds to the position of the config in the vector that is stored
46 // on the device.
47 int configId;
48 // Human readable name of the refresh rate.
49 std::string name;
50 };
51
52 // TODO(b/122916473): Get this information from configs prepared by vendors, instead of
53 // baking them in.
54 explicit RefreshRateConfigs(
55 const std::vector<std::shared_ptr<const HWC2::Display::Config>>& configs) {
Ana Krulec4593b692019-01-11 22:07:25 -080056 init(configs);
Ana Krulecb43429d2019-01-09 14:28:51 -080057 }
58 ~RefreshRateConfigs() = default;
59
60 const std::vector<RefreshRate>& getRefreshRates() { return mRefreshRates; }
61
62private:
Ana Krulec4593b692019-01-11 22:07:25 -080063 void init(const std::vector<std::shared_ptr<const HWC2::Display::Config>>& configs) {
64 // This is the rate that HWC encapsulates right now when the device is in DOZE mode.
65 mRefreshRates.push_back(
66 RefreshRate{RefreshRateType::POWER_SAVING, SCREEN_OFF_CONFIG_ID, "ScreenOff"});
67
68 if (configs.size() < 1) {
69 ALOGE("Device does not have valid configs. Config size is 0.");
70 return;
71 }
72
73 // Create a map between config index and vsync period. This is all the info we need
74 // from the configs.
75 std::vector<std::pair<int, nsecs_t>> configIdToVsyncPeriod;
76 for (int i = 0; i < configs.size(); ++i) {
77 configIdToVsyncPeriod.emplace_back(i, configs.at(i)->getVsyncPeriod());
78 }
79
80 std::sort(configIdToVsyncPeriod.begin(), configIdToVsyncPeriod.end(),
81 [](const std::pair<int, nsecs_t>& a, const std::pair<int, nsecs_t>& b) {
82 return a.second > b.second;
83 });
84
85 // When the configs are ordered by the resync rate. We assume that the first one is DEFAULT.
86 nsecs_t vsyncPeriod = configIdToVsyncPeriod[0].second;
87 if (vsyncPeriod != 0) {
88 const float fps = 1e9 / vsyncPeriod;
89 mRefreshRates.push_back(RefreshRate{RefreshRateType::DEFAULT,
90 configIdToVsyncPeriod[0].first,
91 base::StringPrintf("%2.ffps", fps)});
92 }
93 if (configs.size() < 2) {
94 return;
95 }
96
97 // When the configs are ordered by the resync rate. We assume that the second one is
98 // PERFORMANCE, eg. the higher rate.
99 vsyncPeriod = configIdToVsyncPeriod[1].second;
100 if (vsyncPeriod != 0) {
101 const float fps = 1e9 / vsyncPeriod;
102 mRefreshRates.push_back(RefreshRate{RefreshRateType::PERFORMANCE,
103 configIdToVsyncPeriod[1].first,
104 base::StringPrintf("%2.ffps", fps)});
105 }
106 }
107
Ana Krulecb43429d2019-01-09 14:28:51 -0800108 std::vector<RefreshRate> mRefreshRates;
109};
110
111} // namespace scheduler
112} // namespace android