[alsa-devel] [PATCH 1/3] ASoC: Add signal generator widget type

Mark Brown broonie at opensource.wolfsonmicro.com
Thu Dec 1 16:59:56 CET 2011

On Thu, Dec 01, 2011 at 03:55:14PM +0000, Liam Girdwood wrote:
> On Thu, 2011-12-01 at 15:30 +0000, Mark Brown wrote:

> > It's a signal source - in terms of the DAPM graph and figuring out a
> > route from an input to an output it's an input.

> Ah, OK - I'm thinking here of an internal signal generator (i.e. coming
> from within platform/codec). e.g. we could add a simple sine wave
> generator to OMAP4 ABE for test/debug purposes.

Yeah, that's exactly the sort of thing that this is for in the first
instance (though in the WM8962 case it's a bit more fully featured than
that).  If they are output widgets DAPM looks for something to input
data to them, can't find one and does the wrong thing.

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