Asoc: Intel: SST (CHT) regression in asoc/for-5.11

[Pierre-Louis Bossart]

> On 11/29/20 6:24 AM, Hans de Goede wrote:
>> Hi All,
>>
>> To test the code to dynamically switch between SST/SOF support on BYT/CHT
>> from the kernel commandline I merged:
>>
>> https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git/log/?h=for-5.11 
>>
>>
>> Into my personal tree (mostly Linus' master + some pending patches from
>> myself).
>>
>> After this I was getting the following errors in dmesg when using 
>> sound on
>> a Medion E2228T laptop with a CHT SoC + NAU8824 codec:
>>
>> [   53.805205] intel_sst_acpi 808622A8:00: Wait timed-out 
>> condition:0x0, msg_id:0x1 fw_state 0
>> [   53.805479] intel_sst_acpi 808622A8:00: fw returned err -16
>> [   53.806281] sst-mfld-platform sst-mfld-platform: ASoC: PRE_PMD: 
>> pcm0_in event failed: -16
>> [   54.829548] intel_sst_acpi 808622A8:00: Wait timed-out 
>> condition:0x0, msg_id:0x1 fw_state 0
>> [   54.829596] intel_sst_acpi 808622A8:00: fw returned err -16
>> [   54.829668] sst-mfld-platform sst-mfld-platform: ASoC: POST_PMD: 
>> media0_out event failed: -
>> [   55.853230] intel_sst_acpi 808622A8:00: Wait timed-out 
>> condition:0x0, msg_id:0x1 fw_state 0
>> [   55.853244] intel_sst_acpi 808622A8:00: fw returned err -16
>> [   55.853269] sst-mfld-platform sst-mfld-platform: ASoC: POST_PMD: 
>> codec_out0 mix 0 event fai
>> [   56.876435] intel_sst_acpi 808622A8:00: Wait timed-out 
>> condition:0x0, msg_id:0x1 fw_state 0
>> [   56.876481] intel_sst_acpi 808622A8:00: fw returned err -16
>> [   56.876563] sst-mfld-platform sst-mfld-platform: ASoC: POST_PMD: 
>> media0_out mix 0 event fai
>> [   61.847455] intel_sst_acpi 808622A8:00: FW sent error response 0x40015
>> [   61.847564] intel_sst_acpi 808622A8:00: fw returned err -1
>> [   61.847659] sst-mfld-platform sst-mfld-platform: ASoC: error at 
>> snd_soc_dai_startup on ssp2
>> [   61.847722]  SSP2-Codec: ASoC: BE open failed -1
>> [   61.847754]  Audio Port: ASoC: failed to start some BEs -1
>> [   61.847786] intel_sst_acpi 808622A8:00: FW sent error response 0x40006
>> [   64.301284] intel_sst_acpi 808622A8:00: FW sent error response 0x90001
>> [   64.301545] intel_sst_acpi 808622A8:00: not suspending FW!!, Err: -2
>>
>> Dropping the asoc/for-5.11 merge and just cherry-picking Pierre-Louis' 
>> changes
>> for the dynamic switching makes these go away. So this seems to be 
>> caused by
>> other changes in asoc/for-5.11.
>>
>> So any clues where to start looking for this, or should I just bisect 
>> this?
> 
> Thanks for reporting this Hans.
> 
> The only thing that comes to my mind is Morimoto-san's series which 
> modified snd_soc_dai_startup, but that was back in September and should 
> be in 5.10-rcX
> 
> Will give it a try on my side as well.

I was able to reproduce this error with Mark's for-next branch on a CHT 
device w/ rt5640, and git bisect points to this commit:

a27b421f1d04b201c474a15ee1591919c81fb413 is the first bad commit
commit a27b421f1d04b201c474a15ee1591919c81fb413
Author: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>
Date:   Tue Nov 17 13:50:01 2020 -0800

     ASoC: pcm: call snd_soc_dapm_stream_stop() in soc_pcm_hw_clean

     Currently, the SND_SOC_DAPM_STREAM_START event is sent during
     pcm_prepare() but the SND_SOC_DAPM_STREAM_STOP event is
     sent only in dpcm_fe_dai_shutdown() after soc_pcm_close().
     This results in an imbalance between when the DAPM widgets
     receive the PRE/POST_PMU/PMD events. So call
     snd_soc_dapm_stream_stop() in soc_pcm_hw_clean() before the
     snd_soc_pcm_component_hw_free() to keep the stream_stop DAPM
     event balanced with the stream_start event in soc_pm_prepare().

     Also, in order to prevent duplicate DAPM stream events,
     remove the call for DAPM STREAM_START event in dpcm_fe_dai_prepare()
     and the call for DAPM STREAM_STOP event in dpcm_fe_dai_shutdown().

     Reviewed-by: Bard Liao <yung-chuan.liao at linux.intel.com>
     Reviewed-by: Pierre-Louis Bossart 
<pierre-louis.bossart at linux.intel.com>
     Signed-off-by: Ranjani Sridharan <ranjani.sridharan at linux.intel.com>
     Link: 
https://lore.kernel.org/r/20201117215001.163107-1-ranjani.sridharan@linux.intel.com
     Signed-off-by: Mark Brown <broonie at kernel.org>

  sound/soc/soc-pcm.c | 10 +++-------
  1 file changed, 3 insertions(+), 7 deletions(-)


I am not sure why this break the Atom/SST driver, this was reviewed and 
seemed legit - even required IIRC to deal with topology pipelines 
initialized on-demand. Reverting this patch restores functionality. I 
would guess it's the DAPM_STREAM_START that's now missing (or in the 
'wrong' location) and causing issues?

Hans, can you confirm if indeed this is the same issue on your devices?

Thanks
-Pierre