About imx6dl hdmi cec and hpd(hotplug detection) question

[yenchao]

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.

Thx

Yen

[igorpadykov · Accepted solution]

Hi Yen

one can check sect.33.5.219 PHY RXSENSE, PLL lock, and HPD Status Register
(HDMI_PHY_STAT0), sect.33.5.221 PHY RXSENSE, PLL lock, and HPD Mask Register
(HDMI_PHY_MASK0) i.MX6DQ Reference Manual
http://cache.nxp.com/files/soft_dev_tools/doc/support_info/iMX6DQPRM.pdf

Best regards
igor
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