[BUG] waveform deformation with headset capture on IPC4 SDW platforms

[keqiaozhang]

Describe the bug
We recently enabled alsabat test for headset capture on all IPC4 platforms, but found that the waveform is not perfect on all IPC4 SDW platforms.

To Reproduce
~/sof-test/test-case/check-alsabat.sh -c hw:sofsoundwire,1 -p hw:Device,0 -C 2 -F 599

Reproduction Rate
100%

Environment

1. Branch name and commit hash of the 2 repositories: sof (firmware/topology) and linux (kernel driver).
   • Kernel: {cb01c5d89222}
   • SOF: {8f5ee926e20c}
2. Name of the topology file
   • Topology: {sof-ace-tplg/sof-mtl-rt711-4ch.tplg}
3. Name of the platform(s) on which the bug is observed.
   • Platform: {IPC4 SDW platform}

[ranj063]

@keqiaozhang can we try without the EQiir in the capture pipeline? @singalsu FYI

[fredoh9]

I'm trying to reproduce this with/without EQIIR in capture pipeline on MTL SDW. But I'm seeing silence issue first. looks switch/gain settings are not right. Looking at it now.

[fredoh9]

I tried with TGLU_RVP_SDW without any change(=with EQIIR), alsabat capture tests are all passed. I saw the failures and waveform (planresultdetail/23296) but today's daily test(planresultdetail/23323) also passed with same SHA1 build.

MTLP_RVP_SDW issue is different. I will take a look at alsa controls.

[fredoh9]

I tried with TGLU_RVP_SDW without any change(=with EQIIR), alsabat capture tests are all passed. I saw the failures and waveform (planresultdetail/23296) but today's daily test(planresultdetail/23323) also passed with same SHA1 build.

It looks like device specific issue,

• sh-tglu-rvp-sdw-02: i tried on it, it failed. saw same waveform
• sh-tglu-rvp-sdw-01: tested works fine
• sh-tglu-rvp-sdw-03: today's daily test passed

@keqiaozhang can you replace the USB soundcard/loopback cables and try again? Removed P1

[fredoh9]

for MTLP_RVP_SDW, I'm able to verify SDW capture using headset(4-pole plug).
When I use loopback cables, Headset Mic Jack/Headset Mic Switch became off, I can make the Switch ON but 'Headset Mic Jack' is read only.

numid=11,iface=CARD,name='Headset Mic Jack'
  ; type=BOOLEAN,access=r-------,values=1
  : values=off
numid=9,iface=MIXER,name='Headset Mic Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=off

[keqiaozhang]

@keqiaozhang can you replace the USB soundcard/loopback cables and try again? Removed P1

I did a check on TGL-SDW and found that this issue is not related to the USB sound card, it caused by one amixer control rt711 AMIC Volume. If I set rt711 AMIC Volume to 0, then it can always pass the test.

amixer -c sofsoundwire cset name='rt711 AMIC Volume' 0

I have submitted a PR to fix it. thesofproject/sof-test#1021