11 Mar
2011
11 Mar
'11
4:31 p.m.
On Fri, Mar 04, 2011 at 11:04:20AM +0000, Bensaid, Selma wrote:
Why the cpu_dai->active and codec_dai->active are not used to check if the corresponding shutdown or startup callbacks should be called or not?
This could be useful for DAIs that handle capture and playback streams by avoiding:
- perform 2 cpu_dai or codec_dai startup when opening both streams (playback and
Capture)
- close a cpu_dai or codec_dai for a stream (example playback) while
the 2nd stream (playback) is still running
It's done to allow the driver to make the decision about needing to do anything - some drivers may need to do per-stream things, those that don't can work out if they need to do anything. If it became very common we could add variants that only get called once but at the minute we have very few things that support multiple streams in the first place.