[alsa-devel] Streaming wake-up buffer from DSP to SoC over SPI

[Mark Brown]

On Mon, Dec 15, 2014 at 06:45:37PM -0800, Dylan Reid wrote:

> I was thinking of making a separate PCM device.  The odd things are
> that it would have to originate from soc/codecs, the codec would own
> the codec and cpu end of the link, and the hw_ptr position would need
> to be queried over SPI.  But it would make userspace access to it more
> standard looking.

That's all totally fine from a framework point of view, if the data
comes from the CODEC with no SoC side involvement other than the control
interface bus then it's a good way to model things.  The component model
should make this a more natural fit than it is currently, you can just
add a DAI to the CODEC device.
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