[PATCH] ASoC: rt1011: add i2s reference control for rt1011

[Pierre-Louis Bossart]

>>>>> +static const char * const rt1011_i2s_ref[] = {
>>>>> +	"None", "Left Channel", "Right Channel"
>>>>> +};
>>>>
>>>>> +enum {
>>>>> +	RT1011_I2S_REF_NONE,
>>>>> +	RT1011_I2S_REF_LEFT_CH,
>>>>> +	RT1011_I2S_REF_RIGHT_CH,
>>>>> +};
>>>>
>>>> is it possible to get Left-Right-mix (mixed on rt1011) and Left-Right
>>>> (two channels, with the application selecting what they want)?
>>>
>>> It's a mono amp, so there's no Left-Right-mix setting.
>>> And for the choice of Left-Right channel, it's already available with this
>> patch.
>>
>> So it's just to place a mono reference in either left or right channel of the I2S
>> link? Why not dual-mono as well then?
> 
> The patch is a specific control for two amps to send AEC data on single I2S data input pin by standard I2S protocol. 

That's really useful information and worthy of a comment.

What you are doing here is similar to selecting the slot for each amp
with set_tdm_slot(), but leaving the choice to userspace, isn't it?

> If there are two I2S input from SoC, we can add dual-mono mode for it, but so far there is no requirement regarding to this mode.

ok.