[alsa-devel] [PATCH 1/3] ASoC: simple-card: set cpu dai clk in hw_params

[Daniel Mack]

On Tuesday, May 29, 2018 03:38 AM, Kuninori Morimoto wrote:
>> The simple-card driver currently accepts a clock node in the cpu dai
>> sub-node and only uses it as an alternative to the
>> 'system-clock-frequency' property to get the current frequency.
>>
>> This patch adds another use of the passed clock node. If mclk-fs is
>> specified, the clock will be set to the calculated rate (stream rate *
>> mclk_fs) in hw_params. This allows platforms to pass a tuneable clock
>> as phandle that will automatically be set to the right rates.
>>
>> Signed-off-by: Daniel Mack <daniel at zonque.org>
>> ---
> (snip)
>>   	if (mclk_fs) {
>>   		mclk = params_rate(params) * mclk_fs;
>> +
>> +		if (dai_props->cpu_dai.clk)
>> +			clk_set_rate(dai_props->cpu_dai.clk, mclk);
>> +
>>   		ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
>>   					     SND_SOC_CLOCK_IN);
>>   		if (ret && ret != -ENOTSUPP)
> 
> Having codec is nice balance ?

Ah, yes, why not. Will post a v2.


Thanks,
Daniel