[BUG][UCM]Parecord via DMIC will capture empty sound after turn down the input volume to zero then turn it up.

[YvonneYang2]

Describe the bug
System boot up or wake up from s3, then do parecord via DMIC(RT715). Turn down the input volume to zero directly then turn it up, DMIC will capture empty sound.

To Reproduce

1. Boot up system
2. Open sound setting. Choose DMIC input source.
3. Run command "parecord 1.wav -vvvv"
4. Turn down the input volume to zero directly then trun it up.

Reproduced rate
100%

Expected result
DMIC capture normally.

Actual result
DMIC capture empty sound after turn up input volume from zero.

Environment
kernel: https://github.com/bardliao/linux/tree/sdw_release commit: 38d0dcd
FW: https://github.com/thesofproject/sof/commits/cml-010-drop-stable commit: 5e5f69e + PR#2431
tplg: Same with FW branch, sof-cml-rt711-rt1308-mono-rt715.tplg rename to sof-cml-rt711-rt1308-rt715.tplg
UCM :https://github.com/thesofproject/alsa-ucm-conf/tree/master/ucm/sof-sdw-rt711-1308-715
commit: 39528c5 + thesofproject/alsa-ucm-conf#24
platform: CML Laptop with ALC711+ ALC1308+ ALC715 in SDW mode

dmesg.log
logger.log

[ClarexZhou]

Error also seen on WHL laptop with UCM https://github.com/thesofproject/alsa-ucm-conf/tree/sof_ucm1/ucm/LENOVO-20QE000VMC-ThinkPadX1Carbon7th-20QE000VMC and sof-v5.0 kernel+ cml-hda-dmic-002-drop-stable firmware.
Error only occurred when drag volume to 0 in first volume change operation. Error not seen if switch volume to 0 via clicking 0 volume point directly

[ClarexZhou]

@libinyang @juimonen could you please check first?

[juimonen]

yes let me check.

[juimonen]

@ClarexZhou can you check is the mute switch going "on" for some reason?
So something like "amixer contents | grep -i dmic -A 2" with both when you hear something and when things are silent.

[YvonneYang2]

Belowing steps can also reproduce this issue on CML-U & H sdw laptop.

1. Run command "areocrd -Dhw:0,4 -r 48000 -c 2 -f s16_le test.wav -vv -i" or "areocrd -Dhw:0,1 -r 48000 -c 2 -f s16_le test.wav -vv -i"
2. Turn capture volume"PGA2.0 2" to zero in alsamixer
3. Turn it back to normal volume.

dmesg.log
logger.log

[YvonneYang2]

Tested it with ww50 pv kernel+fw+ucm, issue cannot be reproduced.

[ClarexZhou]

@ClarexZhou can you check is the mute switch going "on" for some reason?
So something like "amixer contents | grep -i dmic -A 2" with both when you hear something and when things are silent.

Capture switch in amixer contens is already back to OK once error occurred. But can't capture any audio. "Input level" always no data. Can be recovered via system S3 then wake up.

[ClarexZhou]

On whl platform, only can reproduced via parecord, not reproduce via aplay