Audio out on DisplayPort but not HDMI, on AMD Ryzen APU/Vega

[Takashi Iwai]

On Fri, 02 Jul 2021 15:27:30 +0200,
Damjan Georgievski wrote:
> 
> I have a desktop computer with an AMD Ryzen 5 4650G PRO APU (CPU + on-die GPU).
> The motherboard (MSI Mortar B550m wifi / bios 1.6). has one
> displayport and one HDMI outputs.
> The displayport is connected to my Lenovo P27 monitor, and the HDMI to
> my Samsung TV.
> 
> When I choose the GPU as an audio out, I only get audio on the 3.5"
> headphones jack of the Lenovo monitor, while I would like to get the
> audio on the Samsung TV over HDMI.
> I can't find a way to switch the different outputs (neither over
> pipewire or just using native alsa).
> 
> pavucontrol configuration https://i.imgur.com/9nbVtNz.png
> alsamixer -c0 only has only one option to mute s/pdif, which mutes the
> output on the displayport -> Lenovo -> 3.5" jack.
> 
> 
> $ aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 1: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
> card 2: Generic_1 [HD-Audio Generic], device 0: ALCS1200A Analog
> [ALCS1200A Analog]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
> card 2: Generic_1 [HD-Audio Generic], device 1: ALCS1200A Digital
> [ALCS1200A Digital]
>  Subdevices: 1/1
>  Subdevice #0: subdevice #0
> 
> Am I correct that card 1 here ^ should have at least two devices?

It could have more entries, depending on the configuration.
I suppose you enabled CONFIG_SND_HDA_CODEC_HDMI properly?
Please give alsa-info.sh output for more detailed analysis.


Takashi