How to configure HDMI, instead of DP, on customized carrier board

[jimmy_ma]

Hi Sir,
I am using r36.4.3,.
I would like to configure HDMI on our customized carrier board, instead of DP.

So, I follow the steps according to the online NVIDIA document:

1. I tried to use dcb_tool to configure dcb stuff, but I can’t find the file “tegra234-dcb-p3701-0000-a02-p3737-0000-a01.dtsi” at DRIVERS or SOURCES, or any similar dtsi file name which contains “dcb” string:

Where can I get the dtsi file ?

2. Besides using dcb_tool, another step is to modify the spreadsheet(pinmux setting) as below:
   
   

However, I compared the generated “Orin-jetson_agx_orin-pinmux.dtsi” after modification with the default one(using DP), and I found they seem to the same. In other words, the change to this DP/HDMI setting seems not effective.

Did I miss any other step ?

Please advise. Thanks.

Jimmy

[WayneWWW]

Please refer to the p3509-a02-p3767-0000.conf. This file includes everything for the enable of HDMI.

[jimmy_ma]

Hi Wayne,

1. dcb_tool:
   I found the dtsi file dcb_tool needs.
2. spreadsheet:
   I will work on it and update soon.

Thanks.

Jimmy

[jimmy_ma]

@WayneWWW
Hi Wayne,
The board config file provided by you seems to be for jetson orin nano devkit.
I do compare its pinmux.dtsi with the one of agx orin , but it is difficult for me to figure out where should I notice, since there is so much difference.

I also tried to find the clue with keyword “hdmi” or “dp”, and I found nothing except of hdmi_cec.

I am also pretty sure that modifying spreadsheet seems not to provide any change about HDMI or DP to pinmux.dtsi or gpio.dtsi.

Could you provide more information ? What to expect from pinmux.dtsi or gpio.dtsi, after modifying spreadsheet ?

Many thanks~

Jimmy

[WayneWWW]

Hi,

Go to check the pinmux of Orin Nano there. There is DP version and HDMI version.

Generate both of them and do the diff. And you will see what pin is needed.