[alsa-devel] synchronized block of register writes
Peter.Hsiang at maxim-ic.com
Thu Apr 7 02:01:59 CEST 2011
On Wed, Apr 06, Mark Brown wrote:
> On Wed, Apr 06, 2011 at 03:28:10PM -0700, Peter Hsiang wrote:
> > Hi Mark and Everyone,
> Fix your mailer to word wrap at 80 columns, I've reflowed your text.
Sorry about that. The email client/server is too "smart."
It is already set to 80 columns. Until I figure out a more
permanent solution, I will add a [return] at the end of each line.
> > When a codec driver control handling function needs to write a group
> > of registers without any other register of the same codec being
> > written to in parallel by ALSA, what is the best way to do this under
> > the snd-soc codec driver architecture? In the current architecture,
> > does the driver's control handling function execute serially with
> > other ALSA automated activities?
> The framework should be taking care of locking for you in most
> situations. If you implement custom controls you will want to take the
> CODEC mutex while applying changes from them (most of the existing
> drivers are lax about this) and similarly for IRQs.
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