andy git 06/15 suspend/resume observations

Andy Green andy at
Tue Jun 17 15:42:35 CEST 2008

Hash: SHA1

Somebody in the thread at some point said:
| On Mon, Jun 16, 2008 at 11:36:56PM +0100, Andy Green wrote:
|> BTW Mark... we use the sideband path for voice data... no *ALSA* device
|> is opened during that time, but we could do with 50K source impedence to
|> Vref not 500K which happens shortly after you close an alsa device.  How
|> do you think we should come at that?  Keep 50K up while there is any
|> active analogue routing path open?  Or a new ALSA switch, or
something else?
| ASoC should be holding the codec in full bias whenever there is a
| complete audio path up so that this is transparent to user space.  It's
| something we're aware of - it should just be a case of moving the bias
| power managment from the PCM stream code into the DAPM path management.

OK.  We tried forcing bias to 50K but it didn't seem to make any
difference to the audio, so it's not exactly critical.

- -Andy

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