HDMI audio fails to start #652

Description

The HDMI audio device was detected, but playback would not start. PipeWire repeatedly logged:
spa.alsa: hw:0p: snd_pcm_start: Cannot allocate memory
im sure there's enough memory at the time.

Repro Steps

my device: m1 pro mbp(j314) connected to the projector via hdmi
Linux nixos 7.1.13 #1-NixOS SMP PREEMPT @315532800 aarch64 GNU/Linux
enabled appledrm.hdmi_audio=1

Expected Behaviour

start playing video with sound

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Please agree to the following

• I have reproduced this on Fedora Asahi Remix
• I have isolated this issue to software vendored by Asahi Linux
• I am not acting as a meat proxy for an LLM