simultaneous playback of multiple streams with MUX component not working with latest sof FW (20-march-2023)

[maruthi-machani]

With latest sof FW (20-march-2023), simultaneous playbacks of 2 input streams using mux component only single stream is working. no audio playback observed on the second stream. Earlier sof FW (02-March-2023) simultaneous playback was working properly.

[plbossart]

"simultaneous playbacks of 2 input streams"

You already lost me here @maruthi-machani, no idea how you managed to have 'playback' and 'input streams' in the same sentend.

Please provide clearer descriptions of

• what platform
• what topology
• what test
  you are running.

[maruthi-machani]

with AMD platform, when simultaneous two input streams are played using mux component only single input stream is played. this issue is observed with the latest sof FW.
Topology uses mux component with two input streams. Attaching topology for reference.
Usecase: simultaneous playback of two input streams on headset and speaker.

sof-acp-rmb-tdm8ch-dmic4ch_m4.txt
pipe-echo-ref-dai-playback_m4.txt

[dbaluta]

@maruthi-machani I bet the problem starts at this commit:

commit c399624fcfb7dfaf75d69671bc2a91ec9812a6ad
Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
Date:   Tue Dec 20 18:48:10 2022 +0200

    Audio: Mux: Convert mux and demux to module adapter

We have similar issue but with MIXER.

[plbossart]

Usecase: simultaneous playback of two input streams on headset and speaker.

Did you mean: playback of one stream on both headset and speaker?

It's very hard to parse your explanations @maruthi-machani

[maruthi-machani]

simultaneously playing two different streams one on headset and other on speaker.

[plbossart]

Where does the mux come into play @maruthi-machani ? Not getting the picture at all.

[plbossart]

Never mind, it's described in the topology where a TDM interface is used.

# PCM0 ----> buffer ------+
#                         |----> muxdemux ----> buffer ---->  ACPSP_play
# PCM1 ----> buffer ----->

[plbossart]

@maruthi-machani this isn't a topology that's used on the Intel devices, headset and amplifiers use separate I2S links.

[maruthi-machani]

@plbossart irrespective of intel/amd platforms the mux component should support TDM of multiple input streams. this specific issue is observed recently. earlier (before march 6 sof) this issue is not observed.

[bhiregoudar]

Hi Liam,
Please assign this issue to proper author

[lgirdwood]

@dbaluta @bhiregoudar we dont have any working Intel IPC3/xtos configs in main now, but I think we can probably shed some light on this via the ALSA plugin (in the lrg/topic/plugin) branch. i.e. we can run the topology on host PC.

I think in the short term we can get the plugin running in CI in IPC3 mode, but we will probably need some help from NXP/AMD to do this. ALSA plugin would give us some IPC3 & IPC4 coverage on CI. Ideally we would have a UT for each module/component type.