No HDMI audio with some Philips TVs

• PipeWire version (pipewire --version): 0.3.64
• Distribution and distribution version (PRETTY_NAME from /etc/os-release): Fedora Linux 37 (Workstation Edition)
• Desktop Environment: Gnome
• Kernel version (uname -r): 6.1.6-200.fc37.x86_64

Description of Problem:

No HDMI audio with some Philips TVs

Steps to Reproduce:

1. Connect your PC to a Philips FTV screen and select HDMI audio as your output device.

Actual Results:

Gnome becomes aware of a new HDMI output but there is no sound from the TV, even if you manually select the HDMI output in Gnome.

Expected Results:

There should be sound from the TV.

Additional Info (as attachments):

The problem has been discussed here and here:

• https://bbs.archlinux.org/viewtopic.php?id=281263
• https://ask.fedoraproject.org/t/make-pipewire-use-alsa-config-change/20498

Like I described in the askfedora thread, I could play audio through HDMI by a asound.conf fix I took from archwiki: https://wiki.archlinux.org/title/Advanced_Linux_Sound_Architecture/Troubleshooting#HDMI_Output_does_not_work

pcm.!default {
    type plug
    slave.pcm "hdmi"
}

However, I couldn't make this work on pipewire.

I can upload a pw-dump later when I'm home and will happily provide any logs that could be helpful. As I'm somewhat of a Linux audio beginner, I'm not sure what to attach here. Some logs can be found in the linked threads.