sorry for my late response, local team is on holiday from 10/1-10/8, I'm limited to access the mail, I attach the dts files which are tested by the internal team and work with hdmi audio, you can refer to that, if still failed and you are urgent, you can "submit a ticket" from the link as below, attached your error message and dts files, my other location engineers would continue helping you
NXP Technical Support and Resources for Developers | NXP Semiconductors
Hdmi audio still doesn't work.
I would like to ask, has nxp tried hdmi audio?
This lt9611 driver can be used on imx8, and it also has audio. However, on imx93, no audio came out, and an error was reported below.