Gabriel D

@c0rnelius, that did the trick, and made it possible to upgrade my Debian Buster install to 23.02.2 Kernel 6.1.11 and have HDMI Audio! Thanks a bunch!! 😀 I will try this solution on Debian Bullseye as well. Now it's time to figure out how to enable my Panfrost driver in place llvmpipe on Buster, but that's another issue for another thread.

I have the same issue using Debian Buster, and the HDMI audio only works up to kernel 5.10.102. Anything past that, and all I get is dummy audio. I have found Ubuntu Focal will work with HDMI audio with the MATE desktop up to Kernel 5.10.102 as well, plus you gain the ability to use the Panfrost GPU driver. I think there may be an issue with the DTB /Uboot files past kernel 5.10.102, so I set Armbian config to freeze kernel and firmware upgrades until I know the problem has been rectified. Kind of a bummer since I have a Edimax Wifi 5 dongle that seems to require Kernel 6.1 to operate.