[alsa-devel] About iMX6SL AUDMUX (port 7) and SSI3

[Xuebing Wang]

Nicolin,

Thanks. As the mainline kernel supports I2S master mode, would you 
please tell me which ASoC machine driver actually uses I2S master mode?

The reason I am asking is that I am using I2S master mode, I'd like to 
reference that machine driver to configure audmux by function 
imx_audmux_v2_configure_port().

Thanks.


On 02/20/2015 01:01 PM, Nicolin Chen wrote:
> On Thu, Feb 19, 2015 at 06:57:39PM +0800, Xuebing Wang wrote:
>
>> I am working on ASoC based sound driver for our iMX6SL based board.
>> There are 3 I2S peripherals on the board:
>> - iMX6SL pads AUD3 (as in AUD3_TXC), connect to peripheral Codec3
>> - iMX6SL pads AUD5 connect to Codec5
>> - iMX6SL pads Aud6, connect to Codec6
>>
>> Q1) Is internal SSI3 controller (ssi at 02030000) actually *hard-wired*
>> to AUDMUX port 7?
> Yes. The first version of AUDMUX was only designed for two SSIs.
> Later version of i.MX SoC added an extra SSI so it had to connect
> to AUD7 which looks a bit weird.
>
>> Q2) Can I configure audmux as below?
>> - External AUD3 -> internal SSI3 (which is actually audmux port 7?)
>> - External AUD5 -> internal SSI2 (ssi at 0202c000)
>> - External AUD6 -> internal SSI1 (ssi at 02028000)
> I think you can.
>
> Nicolin
>

-- 
Xuebing