[alsa-devel] [RFC v2 4/7] ASoC: dmaengine_pcm: add copy support

[Mark Brown]

On Mon, Feb 13, 2017 at 05:38:26PM +0100, Arnaud Pouliquen wrote:
> From: olivier moysan <olivier.moysan at st.com>
> 
> Add copy support in pcm damengine operations.
> As example, this allows to:
> - process data before rendering (IEC status insertion),
> - process captured sample ( sample mask and shift).

dmaengine with copy...  so not DMA at all?  I'm a bit confused about why
we're extending the dmaengine code to have a copy operation rather than
just writing driver code.
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