[alsa-devel] [PATCH 11/11] ucm: docs: Add DefaultNodeGain

[Curtis Malainey]

On Mon, Nov 11, 2019 at 7:34 AM Jaroslav Kysela <perex at perex.cz> wrote:
>
> Dne 07. 11. 19 v 2:58 Curtis Malainey napsal(a):
> > Allow ucm to specify a default hardware gain to overide on the respective node.
> >
> > Signed-off-by: Curtis Malainey <cujomalainey at chromium.org>
> > ---
> >   include/use-case.h | 2 ++
> >   1 file changed, 2 insertions(+)
> >
> > diff --git a/include/use-case.h b/include/use-case.h
> > index ee6ee5e0..d0e821d5 100644
> > --- a/include/use-case.h
> > +++ b/include/use-case.h
> > @@ -347,6 +347,8 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr,
> >    *   - SoftwareGain
> >    *      - Specify the software gain in 0.01dB. E.g. "20" means there will be
> >    *        0.2 dB software gain on this node.
> > + *   - DefaultNodeGain
> > + *      - Change the default node gain. E.g: “-700” to set -7 dB on this node
> >    *   - DisableSoftwareVolume
> >    *      - Set to "1" to force userspace to use hardware volume controls
> >    */
> >
>
> I don't see the usage. Could you elaborate a bit which purpose is for this value?
>
>                                         Jaroslav
>
This along with software gain actually should be dropped from the
patchset. We are modifying our use case to make it more configurable
for multi-stream use. The original use case is for systems like
hotword capture streams.
> --
> Jaroslav Kysela <perex at perex.cz>
> Linux Sound Maintainer; ALSA Project; Red Hat, Inc.