linux-kernel - Re: [RFC PATCH 1/6] ASoC: core: add support to snd_soc_dai_get_sdw

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Message-ID: <689065b2-9d5c-68b4-d72f-1e971b903df2@linaro.org>
Date:   Mon, 10 Jun 2019 08:58:33 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     broonie@...nel.org, robh+dt@...nel.org, devicetree@...r.kernel.org,
        mark.rutland@....com, pierre-louis.bossart@...ux.intel.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 1/6] ASoC: core: add support to
 snd_soc_dai_get_sdw_stream()



On 10/06/2019 05:34, Vinod Koul wrote:
> On 07-06-19, 09:56, Srinivas Kandagatla wrote:
>> On platforms which have smart speaker amplifiers connected via
>> soundwire and modeled as aux devices in ASoC, in such usecases machine
>> driver should be able to get sdw master stream from dai so that it can
>> use the runtime stream to setup slave streams.
>>
>> soundwire already as a set function, get function would provide more
>> flexibility to above configurations.
>>
>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>> ---
>>   include/sound/soc-dai.h | 10 ++++++++++
>>   1 file changed, 10 insertions(+)
>>
>> diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
>> index f5d70041108f..9f90b936fd9a 100644
>> --- a/include/sound/soc-dai.h
>> +++ b/include/sound/soc-dai.h
>> @@ -177,6 +177,7 @@ struct snd_soc_dai_ops {
>>   
>>   	int (*set_sdw_stream)(struct snd_soc_dai *dai,
>>   			void *stream, int direction);
>> +	void *(*get_sdw_stream)(struct snd_soc_dai *dai, int direction);
> 
> So who would be calling this API? Machine or someone else?

 From Machine driver in my case where smart speaker amplifiers are 
modeled as aux device which is also dai less.

--srini
>