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SubjectRe: [RFC/PATCH v6 05/12] media: Reference count and power handling
On Thu, Nov 25, 2010 at 03:28:12AM +0100, Laurent Pinchart wrote:

> If the entity is of node type, the power change is distributed to
> all connected entities. For non-nodes it only affects that very
> node. A mutex is used to serialise access to the entity graph.

ASoC has its own power management stuff which doesn't *quite* map onto
this one as-is. The power determination stuff is essentially identical
(and this is actually nicer) but we have a separate postprocessing stage
that actually applies the changes in a sequence which minimises audible
issues caused by doing things in a bad order (eg, power down a PGA
before you turn off inputs). This is noddy enough to implement, though
- we just need a pre and post run notifications to set up and implement
the changes I think.

BTW, I notice you've not CCed the ALSA list, Liam, Takashi or Jaroslav
on any of this - might be good.

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