vr/VrDevice.cpp

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define LOG_TAG "VrDevice"

#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>

#include "VrDevice.h"

namespace android {
namespace hardware {
namespace vr {
namespace V1_0 {
namespace implementation {

VrDevice::VrDevice() : mVRmode(false) {}

Return<void> VrDevice::init() {
    // NOOP
    return Void();
}

Return<void> VrDevice::setVrMode(bool enabled) {
    std::string hwProp = android::base::GetProperty("ro.hardware", "default");
    std::string vrMode = enabled ? "-vr" : "";
    std::string thermalConf = "/vendor/etc/thermal-engine-" + hwProp + vrMode + ".conf";
    mVRmode = enabled;

    if (!android::base::SetProperty("vendor.sys.qcom.thermalcfg", thermalConf)) {
        LOG(ERROR) << "Couldn't set vendor.sys.qcom.thermalcfg to " << thermalConf;
        return Void();
    }
    if (!android::base::SetProperty("ctl.restart", "vendor.thermal-engine")) {
        LOG(ERROR) << "Couldn't set thermal_engine restart property";
    }
    return Void();
}

Return<void> VrDevice::debug(const hidl_handle& handle, const hidl_vec<hidl_string>&) {
    if (handle != nullptr && handle->numFds >= 1) {
        int fd = handle->data[0];
        std::string buf(android::base::StringPrintf("VRMode: %s\n",
                                                    (mVRmode ? "true" : "false")));
        if (!android::base::WriteStringToFd(buf, fd)) {
            PLOG(ERROR) << "Failed to dump state to fd";
        }
        fsync(fd);
    }
    return Void();
}

}  // namespace implementation
}  // namespace V1_0
}  // namespace vr
}  // namespace hardware
}  // namespace android