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

[Damjan Georgievski]

(re-sent to the mail list)

On Thu, 8 Jul 2021 at 13:37, Takashi Iwai <tiwai at suse.de> wrote:
>
> 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?

yes - CONFIG_SND_HDA_CODEC_HDMI=m is enabled.
I've been using the  Arch distro kernel, which has that enabled; but
also with self-compiled 5.13.0 from
stable, with the same distro config; and with 5.14-git (77d34a468)
with the same config.
All have the same behaviour.

Should this hardware be supported with the
sound/soc/amd/renoir/rn-pci-acp3x.c driver (instead of snd_hda_intel)?
… since it is a Renoir desktop APU.

> Please give alsa-info.sh output for more detailed analysis.


http://alsa-project.org/db/?f=00b31f3f0e6c58b56c73f98aec7c6b5ccaff700e



Thanks for looking into this.



-- 
damjan