The HDMI connector features a CEC (Consumer Electronics Control) pin that allows connected devices to detect and control one another. A new framework to handle CEC was added to the kernel in 2016.

This talk describes the current state of the CEC support, how to implement new CEC drivers and the various complications you will encounter when using CEC.

Hans Verkuil

[slideshare id=80558555&doc=cec-kr-171007142554&w=650&h=500]