i.MX ProcessorsのトピックRe: imx6q(d) i2s without audio codec initialization

imx6q(d) i2s without audio codec initialization

stanislavgeorge — Fri, 26 Jun 2015 06:41:29 GMT

Can somebody help me, I want to get i2s signal from imx6q without initialization of audio codec. I want to use external controller that will receive the i2s signal, and then configure the DAC and send data to it?

How can i initialize audio i2s interface in alsa.

Re: imx6q(d) i2s without audio codec initialization

saurabh206 — Fri, 26 Jun 2015 11:39:00 GMT

Hi George

You need to register dummy sound-card.

- Configure SSI and AUDMux.

- You need to configure SSI clocking

SSI master mode if SSI provides clock to external codec.
SSI slave if external codec provides clock to SSI.

Thanks

Saurabh

Re: imx6q(d) i2s without audio codec initialization

stanislavgeorge — Sat, 27 Jun 2015 06:57:12 GMT

Hello, Saurabh.

So configuration of SSI using dts file? That's right?

Re: imx6q(d) i2s without audio codec initialization

saurabh206 — Sat, 27 Jun 2015 07:12:39 GMT

Hi George

You need to

- Configure SSI using DTS file.

- Add dummy codec.

- Add platform specific driver code for SSI direction and clocking.

- Use ALSA for testing.

Thanks

Saurabh

Re: imx6q(d) i2s without audio codec initialization

hsl — Thu, 16 Aug 2018 02:35:55 GMT

Hello there:
Is this problem solved?
I am experiencing similar problems now. How do I register a virtual sound card? Can you provide me some source code for my reference?
thank you very much!

Re: imx6q(d) i2s without audio codec initialization

hsl — Thu, 16 Aug 2018 02:39:55 GMT

Hi，Saurabh：

Excuse me，How can I register a virtual sound card?

thank!