101 lines
2.8 KiB
C++
Executable file
101 lines
2.8 KiB
C++
Executable file
/*
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* Copyright (C) 2021 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 "android.hardware.tv.cec@1.0-impl"
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#include <android-base/logging.h>
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#include <errno.h>
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#include <linux/cec.h>
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#include <linux/ioctl.h>
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#include <sys/eventfd.h>
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#include <algorithm>
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#include "HdmiCecPort.h"
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namespace android {
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namespace hardware {
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namespace tv {
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namespace cec {
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namespace V1_0 {
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namespace implementation {
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HdmiCecPort::HdmiCecPort(unsigned int portId) {
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mPortId = portId;
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mCecFd = -1;
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mExitFd = -1;
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}
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HdmiCecPort::~HdmiCecPort() {
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release();
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}
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// Initialise the cec file descriptor
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Return<Result> HdmiCecPort::init(const char* path) {
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mCecFd = open(path, O_RDWR);
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if (mCecFd < 0) {
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LOG(ERROR) << "Failed to open " << path << ", Error = " << strerror(errno);
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return Result::FAILURE_NOT_SUPPORTED;
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}
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mExitFd = eventfd(0, EFD_NONBLOCK);
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if (mExitFd < 0) {
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LOG(ERROR) << "Failed to open eventfd, Error = " << strerror(errno);
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release();
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return Result::FAILURE_NOT_SUPPORTED;
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}
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// Ensure the CEC device supports required capabilities
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struct cec_caps caps = {};
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int ret = ioctl(mCecFd, CEC_ADAP_G_CAPS, &caps);
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if (ret) {
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LOG(ERROR) << "Unable to query cec adapter capabilities, Error = " << strerror(errno);
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release();
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return Result::FAILURE_NOT_SUPPORTED;
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}
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if (!(caps.capabilities & (CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT | CEC_CAP_PASSTHROUGH))) {
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LOG(ERROR) << "Wrong cec adapter capabilities " << caps.capabilities;
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release();
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return Result::FAILURE_NOT_SUPPORTED;
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}
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uint32_t mode = CEC_MODE_INITIATOR | CEC_MODE_EXCL_FOLLOWER_PASSTHRU;
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ret = ioctl(mCecFd, CEC_S_MODE, &mode);
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if (ret) {
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LOG(ERROR) << "Unable to set initiator mode, Error = " << strerror(errno);
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release();
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return Result::FAILURE_NOT_SUPPORTED;
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}
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return Result::SUCCESS;
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}
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Return<void> HdmiCecPort::release() {
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if (mExitFd > 0) {
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uint64_t tmp = 1;
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write(mExitFd, &tmp, sizeof(tmp));
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}
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if (mExitFd > 0) {
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close(mExitFd);
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}
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if (mCecFd > 0) {
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close(mCecFd);
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}
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return Void();
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}
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} // namespace implementation
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} // namespace V1_0
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} // namespace cec
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} // namespace tv
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} // namespace hardware
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} // namespace android
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