title: Send CEC command from TV to Android phone
body: <p>I’m trying to send HDMI-CEC command from a TV set to my Android phone (both of them can support CEC protocol). Although I have already read the CEC specifications, the problem is that I don’t know how to send CEC command ONLY via the HDMI cable. I know libCEC has done much thing; it seems that it requires purchasing their Pulse-Eight USB - CEC Adapter.
  Does everyone know the rough progress of CEC command transmission ONLY via HDMI cable?
  Thank you very much.</p>