1 /* 2 * Copyright 2018 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 <atomic> 20 #include <unordered_set> 21 22 #include <utils/Mutex.h> 23 24 #include "../Scheduler/OneShotTimer.h" 25 #include "DisplayIdentification.h" 26 27 namespace android { 28 29 class SurfaceFlinger; 30 31 namespace Hwc2 { 32 33 class PowerAdvisor { 34 public: 35 virtual ~PowerAdvisor(); 36 37 // Initializes resources that cannot be initialized on construction 38 virtual void init() = 0; 39 virtual void onBootFinished() = 0; 40 virtual void setExpensiveRenderingExpected(DisplayId displayId, bool expected) = 0; 41 virtual bool isUsingExpensiveRendering() = 0; 42 virtual void notifyDisplayUpdateImminent() = 0; 43 }; 44 45 namespace impl { 46 47 // PowerAdvisor is a wrapper around IPower HAL which takes into account the 48 // full state of the system when sending out power hints to things like the GPU. 49 class PowerAdvisor final : public Hwc2::PowerAdvisor { 50 public: 51 class HalWrapper { 52 public: 53 virtual ~HalWrapper() = default; 54 55 virtual bool setExpensiveRendering(bool enabled) = 0; 56 virtual bool notifyDisplayUpdateImminent() = 0; 57 }; 58 59 PowerAdvisor(SurfaceFlinger& flinger); 60 ~PowerAdvisor() override; 61 62 void init() override; 63 void onBootFinished() override; 64 void setExpensiveRenderingExpected(DisplayId displayId, bool expected) override; isUsingExpensiveRendering()65 bool isUsingExpensiveRendering() override { return mNotifiedExpensiveRendering; } 66 void notifyDisplayUpdateImminent() override; 67 68 private: 69 HalWrapper* getPowerHal() REQUIRES(mPowerHalMutex); 70 bool mReconnectPowerHal GUARDED_BY(mPowerHalMutex) = false; 71 std::mutex mPowerHalMutex; 72 73 std::atomic_bool mBootFinished = false; 74 75 std::unordered_set<DisplayId> mExpensiveDisplays; 76 bool mNotifiedExpensiveRendering = false; 77 78 SurfaceFlinger& mFlinger; 79 const bool mUseScreenUpdateTimer; 80 std::atomic_bool mSendUpdateImminent = true; 81 scheduler::OneShotTimer mScreenUpdateTimer; 82 }; 83 84 } // namespace impl 85 } // namespace Hwc2 86 } // namespace android 87