[alsa-devel] [PATCH 7/7] ASoC: SOF: Intel: Account for compress streams when servicing IRQs

[Cezary Rojewski]

On 2019-12-17 11:30, Takashi Iwai wrote:
> On Tue, 17 Dec 2019 10:58:51 +0100,
> Cezary Rojewski wrote:
>>
>> Update stream irq handler definition to correctly set hdac_stream
>> current position when servicing stream interrupts for compress streams.
>>
>> Cc: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
>> Signed-off-by: Cezary Rojewski <cezary.rojewski at intel.com>
>> ---
>>   include/sound/hdaudio.h          |  1 +
>>   sound/soc/sof/intel/hda-stream.c | 26 ++++++++++++++++++++++++--
>>   2 files changed, 25 insertions(+), 2 deletions(-)
>>
>> diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
>> index 9a8bf1eb7d69..9a24d57f0cf2 100644
>> --- a/include/sound/hdaudio.h
>> +++ b/include/sound/hdaudio.h
>> @@ -496,6 +496,7 @@ struct hdac_stream {
>>   	bool locked:1;
>>   	bool stripe:1;			/* apply stripe control */
>>   
>> +	unsigned long curr_pos;
> 
> Unless the actual implementation of this user is shown, it's a bit
> hard to judge whether this addition is really OK or not....
> 
> I don't believe it'd be a big problem at all, but still we need the
> usage implementation for a proper evaluation.
> 
> And, IMO, such a change should be split to two parts: the common API
> change and its user.
> 
> 
> thanks,
> 
> Takashi
> 

The actual user of this is _pointer op for hda compr stream.

Probing pull request link:
https://github.com/thesofproject/linux/pull/1276/

- ASoC: SOF: Intel: Probe compress operations
https://github.com/thesofproject/linux/pull/1276/commits/fb3e724a54bf859f039b2b0b03503a52e1740375

Method hda_probe_compr_pointer initializes 
snd_compr_tstamp::copied_total with hdac_stream::curr_pos value.

If this can be done better or in more elegant way, let's do so.

Czarek