Re: [alsa-devel] [linux-sunxi] Re: [PATCH v2 6/6] ASoC: sun4i-i2s: Add support for loopback

On Tue, Mar 13, 2018 at 01:39:44PM +0000, Chris Obbard wrote:

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+- loopback: if this property is present then the dai is configured in

•         loopback mode where the output fifo is redirected to the input
  

•         fifo.
  

This really doesn't seem like something that ought to go into the DT and hence ABI given that there's obviously no reason to use this in production. Just make it be a #define in the code or something.

It would be nice to have this as an optional devicetree property so when testing JACK latency etc I don't have to manually re-compile a kernel...

Another one might also argue that having to recompile the DT and reflash the whole firmware or EEPROM is overkill for just testing JACK latency.

Can't we create a module parameter for it?

Maxime