[xiulipan]

A testing demux topology with 8-ch.

[xiulipan]

@juimonen Could you help to check if the pipeline and scheduler usage for this kind of pipelines looks right?
@tlauda It looks like a reverse mixer pipeline for playback. But I got error when trigger PCM3 to run. It seems we also need some change to the MUX comp like the MIXER?

TIMESTAMP              DELTA  C# COMPONENT          LOCATION                       CONTENT
[177277351229.635437] (             nan) c0 mux          2.8      src/audio/component.c:182   ERROR comp_set_state() error: wrong state = 5, COMP_TRIGGER_PREPARE
[177277351292.604187] (       62.968750) c0 PIPE                   src/audio/pipeline.c:527   ERROR pipeline_prepare() error: ret = -22, dev->comp.id = 14
[177277351332.812500] (       40.208332) c0 IPC                       src/ipc/handler.c:311   ERROR ipc: pipe 3 comp 14 prepare failed -22
[177277351558.958344] (      226.145828) c0 mux          2.8      src/audio/component.c:172   ERROR comp_set_state() error: wrong state = 5, COMP_TRIGGER_RESET
[177277351867.760437] (      308.802094) c0 dai          2.12     src/audio/component.c:172   ERROR comp_set_state() error: wrong state = 5, COMP_TRIGGER_RESET
[177279579655.625000] (  2227787.750000) c0 mux          2.8      src/audio/component.c:149   ERROR comp_set_state() error: wrong state = 1, COMP_TRIGGER_STOP
[177279579786.354187] (      130.729172) c0 PIPE                   src/audio/pipeline.c:667   ERROR pipeline_trigger() error: ret = -22, host->comp.id = 6, cmd = 0
[177279579828.906250] (       42.552082) c0 IPC                       src/ipc/handler.c:468   ERROR ipc: comp 6 trigger 0x50000 failed -22

[juimonen]

@xiulipan the graph looks correct to me. Have you tried starting pcm 2, does it work? If that works try first starting pcm2 then pcm 2 while pcm 2 is running. it's been long time since I tried demux in real life...

[xiulipan]

@juimonen The PCM2 is working, but anything related to PCM3 will got the comp mux trigger wrong.