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141 lines
3.4 KiB
141 lines
3.4 KiB
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "light"
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#include <android-base/file.h>
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#include <hardware/lights.h>
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#include <log/log.h>
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#include "LightExt.h"
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namespace hardware {
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namespace google {
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namespace light {
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namespace V1_1 {
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namespace implementation {
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using ::android::hardware::light::V2_0::Brightness;
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#define HBM_OFF "0"
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#define HBM_ON "1"
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#define HBM_SV "2"
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Return<Status> LightExt::applyHBM() {
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if (!mHasHbmNode) return Status::UNKNOWN;
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/* skip if no change */
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if (mRegHBM == mCurHBM && mRegHBMSV == mCurHBMSV) return Status::SUCCESS;
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// off
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// <--------
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// 0,0 --------> 0,1
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// | ^ sv ^ |
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// hbm| | off nop| |nop
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// V | sv | V
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// 1,0 --------> 1,1
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// <--------
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// hbm
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// Transition from (mCurHBM, mCurHBMSV) --> (mRegHBM, mRegHBMSV)
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const char *action = NULL;
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if (!mRegHBM && !mRegHBMSV) {
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// to state (0,0)
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action = HBM_OFF;
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} else if (mRegHBMSV) {
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// to state (0,1) or (1,1).
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if (!mCurHBMSV)
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action = HBM_SV;
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} else {
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// to state (1,0)
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action = HBM_ON;
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}
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if (action) {
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if (!android::base::WriteStringToFile(action, kHighBrightnessModeNode)) {
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ALOGE("write %s to HBM sysfs file failed!", action);
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return Status::UNKNOWN;
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}
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ALOGD("write %s to HBM sysfs file succeeded", action);
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}
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mCurHBM = mRegHBM;
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mCurHBMSV = mRegHBMSV;
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return Status::SUCCESS;
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}
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// Methods from ::android::hardware::light::V2_0::ILight follow.
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Return<Status> LightExt::setLight(Type type, const LightState& state) {
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if (type == Type::BACKLIGHT) {
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if (state.brightnessMode == Brightness::LOW_PERSISTENCE) {
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mRegHBM = false;
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mRegHBMSV = false;
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applyHBM();
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mVRMode = true;
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} else {
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// VR has higher priority than HBM. We cannot update HBM status
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// when VR is enabled. Disable VR before apply HBM mode
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Status status = mLight->setLight(type, state);
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mVRMode = false;
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applyHBM();
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return status;
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}
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}
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return mLight->setLight(type, state);
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}
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// Methods from ::hardware::google::light::V1_0::ILight follow.
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Return<Status> LightExt::setHbm(bool on) {
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/* save the request state */
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mRegHBM = on;
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if (mVRMode) return Status::UNKNOWN;
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Status status = applyHBM();
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if (status != Status::SUCCESS)
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mRegHBM = mCurHBM;
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return status;
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}
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// Methods from ::hardware::google::light::V1_1::ILight follow.
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Return<Status> LightExt::setHbmSv(bool on) {
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/* save the request state */
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mRegHBMSV = on;
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if (mVRMode) return Status::UNKNOWN;
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Status status = applyHBM();
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if (status != Status::SUCCESS)
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mRegHBMSV = mCurHBMSV;
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return status;
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}
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Return<bool> LightExt::getHbmSv() {
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return mCurHBMSV;
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}
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} // namespace implementation
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} // namespace V1_1
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} // namespace light
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} // namespace google
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} // namespace hardware
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