1 /* 2 * Copyright (C) 2012 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 <stdint.h> 18 #include <sys/types.h> 19 20 #include <cutils/log.h> 21 #include <utils/Errors.h> 22 23 #include "PowerHAL.h" 24 25 namespace android { 26 // --------------------------------------------------------------------------- 27 28 PowerHAL::PowerHAL() : mPowerModule(0), mVSyncHintEnabled(false) { 29 int err = hw_get_module(POWER_HARDWARE_MODULE_ID, 30 (const hw_module_t **)&mPowerModule); 31 ALOGW_IF(err, "%s module not found", POWER_HARDWARE_MODULE_ID); 32 } 33 34 PowerHAL::~PowerHAL() { 35 } 36 37 status_t PowerHAL::initCheck() const { 38 return mPowerModule ? NO_ERROR : NO_INIT; 39 } 40 41 status_t PowerHAL::vsyncHint(bool enabled) { 42 if (!mPowerModule) { 43 return NO_INIT; 44 } 45 if (mPowerModule->common.module_api_version >= POWER_MODULE_API_VERSION_0_2) { 46 if (mPowerModule->powerHint) { 47 if (mVSyncHintEnabled != bool(enabled)) { 48 mPowerModule->powerHint(mPowerModule, 49 POWER_HINT_VSYNC, (void*)enabled); 50 mVSyncHintEnabled = bool(enabled); 51 } 52 } 53 } 54 return NO_ERROR; 55 } 56 57 // --------------------------------------------------------------------------- 58 }; // namespace android 59 60
