[alsa-devel] [PATCH] ASoC: rt298: remove idle_bias_off = true

[Mark Brown]

On Fri, Jun 03, 2016 at 03:09:32AM +0000, Bard Liao wrote:

> > Could you talk through the use case in more detail - what's the widget
> > and why is it still OK for suspend to run even with widgets on?

> We need to force on "LDO1" widget when a jack is plugged in. That
> is for push button detection(not implement yet). Also, all jack related
> functions such as headphone playback, headset capture need "LDO1"
> on. However, we don't need these functions in suspend. Also, it seems
> the external power will be cut down in suspend even codec suspend
> function is not called. In that case, codec will lost its register setting.
> I.e. Codec registers will be cleaned. And we need to sync with cache.

In a situation like that I'd expect the machine driver to be disabling
jack detection over suspend - it should only be being left enabled if
the jack detection is expected to continue functioning over suspend (a
lot of Android systems do this so things like starting playback from the
button on a plugged in headset continue to work).
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 473 bytes
Desc: not available
URL: <http://mailman.alsa-project.org/pipermail/alsa-devel/attachments/20160606/a521efb7/attachment.sig>