[alsa-devel] [PATCH 2/6] soundwire: stream: update state machine and add state checks

[Pierre-Louis Bossart]

On 1/10/20 10:30 AM, Pierre-Louis Bossart wrote:
> 
>>> -  int sdw_prepare_stream(struct sdw_stream_runtime * stream);
>>> +  int sdw_prepare_stream(struct sdw_stream_runtime * stream, bool 
>>> resume);
>>
>> so what does the additional argument of resume do..?
>>
>>> diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
>>> index 178ae92b8cc1..6aa0b5d370c0 100644
>>> --- a/drivers/soundwire/stream.c
>>> +++ b/drivers/soundwire/stream.c
>>> @@ -1553,8 +1553,18 @@ int sdw_prepare_stream(struct 
>>> sdw_stream_runtime *stream)
>>
>> and it is not modified here, so is the doc correct or this..?
> 
> the doc is correct and the code is updated in
> 
> [PATCH 4/6] soundwire: stream: do not update parameters during 
> DISABLED-PREPARED transition

Sorry, wrong answer, my bad. The code block in the documentation is 
incorrect.

The Patch 4/6 implements the transition mentioned in the documentation, 
but the extra parameter is a left-over from an earlier version. This 
case is now handled internally. We did revert to the initial prototype 
after finding out that dealing with transitions in the caller is 
error-prone.

Will fix in v2, thanks for spotting this.