imx6q HDMI doesn't work. (We use customized board)

[leeinchul]

Dear all,

We use customized board based on imx6q sabreai board and linux OS. HDMI schematic(pin mux and all passive element) is same with sabreai. But we don't use audio function(hw codec doesn't be applied)

When we use same binary image, sabreai works but customize board doesn't work(but hotplug is detected).

If hw codec doesn't be applied, Doesn't HDMI work?

If we have to imx6zeng modify kernel source, would give me the check point?

Thanks and best regard.

[saurabh206]

Hi,

Lee

HDMI display work without Audio also.

Which BSP you are using with your hardware?

Thanks

Saurabh

[leeinchul · Accepted solution]

Hi, Saurabh.

We solved this issue.

We missed HW(CM2020) check point.

TMDS lines must be connected in PCB.

Thanks and best regards.