CEC_MSG_INITIATE_ARC
[CEC_MSG_INITIATE_ARC] = 2 | DIRECTED,
if (!abort && dst->msg[1] == CEC_MSG_INITIATE_ARC &&
msg->msg[1] = CEC_MSG_INITIATE_ARC;
msg->reply = reply ? CEC_MSG_INITIATE_ARC : 0;