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About imx6dl hdmi cec and hpd(hotplug detection) question

Question asked by Yen Chao on Aug 8, 2017
Latest reply on Aug 8, 2017 by igorpadykov

Hi All,


I'm working on imx6dl android 5.1(kernel 3.14.52) and have a question on hdmi cec and hpd(hotplug detection).

That is when a monitor send hpd(hotplug detection) low to our board.

Our board won't receive any hdmi cec signal until we re-initilaize hdmi cec function.

I know it is reasonable for not receiving hdmi cec signal when board receive hpd low.
But I am curious to know why this happen?

Is there any register that will disable hdmi cec signal when board receive hpd low?

Any thoughts or suggestions will be greatly appreciated.