Re: [RFC PATCH v2 6/6] ASoC: q6asm-dai: add support to set_codec_params

[Srinivas Kandagatla <srinivas.kandagatla@linaro.org>]

Thanks Pierre for quick review.

On 21/07/2020 21:09, Pierre-Louis Bossart wrote:
> 
> 
> On 7/21/20 12:00 PM, Srinivas Kandagatla wrote:
>> Make use of new set_codec_params callback to allow decoder switching
>> during gapless playback.
>>
>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
>> ---
>>   sound/soc/qcom/qdsp6/q6asm-dai.c | 33 ++++++++++++++++++++++++++++++++
>>   1 file changed, 33 insertions(+)
>>
>> diff --git a/sound/soc/qcom/qdsp6/q6asm-dai.c 
>> b/sound/soc/qcom/qdsp6/q6asm-dai.c
>> index b5c719682919..a8cfb1996614 100644
>> --- a/sound/soc/qcom/qdsp6/q6asm-dai.c
>> +++ b/sound/soc/qcom/qdsp6/q6asm-dai.c
>> @@ -876,6 +876,37 @@ static int 
>> __q6asm_dai_compr_set_codec_params(struct snd_soc_component *componen
>>       return 0;
>>   }
>> +static int q6asm_dai_compr_set_codec_params(struct snd_soc_component 
>> *component,
>> +                        struct snd_compr_stream *stream,
>> +                        struct snd_codec *codec)
>> +{
>> +    struct snd_compr_runtime *runtime = stream->runtime;
>> +    struct q6asm_dai_rtd *prtd = runtime->private_data;
>> +    int ret;
>> +
>> +    ret = q6asm_open_write(prtd->audio_client, 
>> prtd->next_track_stream_id,
>> +                   codec->id, codec->profile, prtd->bits_per_sample,
>> +                   true);
>> +    if (ret < 0) {
>> +        pr_err("q6asm_open_write failed\n");
>> +        return ret;
>> +    }
>> +
>> +    ret = __q6asm_dai_compr_set_codec_params(component, stream, codec,
>> +                         prtd->next_track_stream_id);
>> +    if (ret < 0) {
>> +        pr_err("q6asm_open_write failed\n");
>> +        return ret;
>> +    }
>> +
>> +    ret = q6asm_stream_remove_initial_silence(prtd->audio_client,
>> +                           prtd->next_track_stream_id,
>> +                           prtd->initial_samples_drop);
>> +    prtd->next_track_stream_id = 0;
> 
> same comment as in the other patchset, the stream_id toggles between 1 
> and 2, it's not clear to me what 0 means.

Valid stream ids start from 1. to achieve gapless we toggle between 1 and 2.

--srini


> 
> off-by-one bug or feature?