Sadly "alsa" does not exist as a command on Debian 😕 (I took the bookworm armbian initially)
I just tested with the "Armbian 24.8.1 Noble Gnome" image, (kernel 6.1.75) but it has no support for hdmi input / hdmirx at all ...
I then tested with the "Ubuntu 24.04 (Noble) / Gnome" image using kernel 6.10, dated August 2024
and I found that "alsa" command in the alsa-base package, present in Ubuntu but deleted long ago on Debian. This command basically tries to unload alsa module and reload them
no change on my orange pi 5 plus when I did that, (I confirmed that the HDMI input had a signal before reloading, via dmesg saying "fdee0000.hdmi_receiver: hdmirx_wait_lock_and_get_timing: signal lock ok, i:2
")
root@orangepi5-plus:~# alsa force-reload
Unloading ALSA sound driver modules: snd-soc-rockchip-i2s snd-soc-simple-card snd-soc-rockchip-i2s-tdm snd-soc-es8328-i2c snd-soc-simple-card-utils snd-soc-es8328 snd-soc-simple-amplifier snd-soc-core snd-compress snd-pcm-dmaengine snd-pcm snd-timer (failed: modules still loaded: snd-soc-simple-card snd-soc-rockchip-i2s-tdm snd-soc-es8328-i2c snd-soc-simple-card-utils snd-soc-es8328 snd-soc-simple-amplifier snd-soc-core snd-compress snd-pcm-dmaengine snd-pcm snd-timer).
Loading ALSA sound driver modules: snd-soc-rockchip-i2s snd-soc-simple-card snd-soc-rockchip-i2s-tdm snd-soc-es8328-i2c snd-soc-simple-card-utils snd-soc-es8328 snd-soc-simple-amplifier snd-soc-core snd-compress snd-pcm-dmaengine snd-pcm snd-timer.
sadly no hdmi audio input ...
root@orangepi5-plus:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Analog [Analog], device 0: fe470000.i2s-es8328-hifi-analog es8328-hifi-analog-0 [fe470000.i2s-es8328-hifi-analog es8328-hifi-analog-0]
Subdevices: 1/1
Subdevice #0: subdevice #0