linux-kernel - Re: [PATCH 1/2] ASoC: wcd9335: fix order of Slimbus unprepare/disable

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Date:   Wed, 21 Sep 2022 17:08:00 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Banajit Goswami <bgoswami@...cinc.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, Vinod Koul <vkoul@...nel.org>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Cc:     stable@...r.kernel.org
Subject: Re: [PATCH 1/2] ASoC: wcd9335: fix order of Slimbus unprepare/disable

On 21/09/2022 17:06, Krzysztof Kozlowski wrote:
> On 21/09/2022 17:05, Pierre-Louis Bossart wrote:
>>> diff --git a/sound/soc/codecs/wcd9335.c b/sound/soc/codecs/wcd9335.c
>>> index 06c6adbe5920..d2548fdf9ae5 100644
>>> --- a/sound/soc/codecs/wcd9335.c
>>> +++ b/sound/soc/codecs/wcd9335.c
>>> @@ -1972,8 +1972,8 @@ static int wcd9335_trigger(struct snd_pcm_substream *substream, int cmd,
>>>  	case SNDRV_PCM_TRIGGER_STOP:
>>>  	case SNDRV_PCM_TRIGGER_SUSPEND:
>>>  	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
>>> -		slim_stream_unprepare(dai_data->sruntime);
>>>  		slim_stream_disable(dai_data->sruntime);
>>> +		slim_stream_unprepare(dai_data->sruntime);
>>
>> This looks logical but different from what the kernel doc says:
>>
>> /**
>>  * slim_stream_disable() - Disable a SLIMbus Stream
>>  *
>>  * @stream: instance of slim stream runtime to disable
>>  *
>>  * This API will disable all the ports and channels associated with
>>  * SLIMbus stream
>>  *
>>  * Return: zero on success and error code on failure. From ASoC DPCM
>> framework,
>>  * this state is linked to trigger() pause operation.
>>  */
>>
>> /**
>>  * slim_stream_unprepare() - Un-prepare a SLIMbus Stream
>>  *
>>  * @stream: instance of slim stream runtime to unprepare
>>  *
>>  * This API will un allocate all the ports and channels associated with
>>  * SLIMbus stream
> 
> You mean this piece of doc? Indeed looks inaccurate. I'll update it.

Wait, no, this is correct. Please point to what is wrong in kernel doc.
I don't see it. :(

Best regards,
Krzysztof