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

[Nicolin Chen]

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