HDMI CEC in i.MX8M

[tooz_hsu]

Hi NXP,

I am working on i.MX8M platform now.

I can't find HDMI CEC info in SW processor reference manual, but I do find some code about HDMI CEC.

Could you help to confirm for me that i.MX8M native HDMI has working CEC function?

Thank you.

https://github.com/boundarydevices/linux-imx6/blob/boundary-imx-o8.1.0_1.3.0_8m-ga/drivers/gpu/drm/i...

hdmi_cec: hdmi_cec@32c33800 {
	compatible = "fsl,imx8-hdp-cec";
	reg = <0x0 0x32c33800 0x0 0x200>;
	status = "disabled";
	};

[richardnardy]

What is the current status of HDMI-CEC support for i.MX8M Plus? How can we get it running?

Currently we use a Variscite Debian build and with "cec-client -l" we get "Found devices: NONE".

[vladimir_dolzhe]

I don't know about iMX8M Plus, but on iMX8M mini in adv7535 cec and cec_clk ball connected  to ground and on the connector cec in the air ....

[joanxie]

yes imx8 HDMI ip includes this in HW,  and I got information about this:

" it will be usable when the software is done. The IP is from Cadence, and they provide us with software to run and configure the hdmi and hdmi phy. This software includes an api to the CEC. However, I don’t have a schedule from our sw team as to when it will be included. "

[peterwu2]

I am working for i.mx8mq on android 13. 

how to enable and use the i.mx8mq hdmi CEC ?