On Mon, Nov 11, 2019 at 7:22 AM Jaroslav Kysela <perex@xxxxxxxx> wrote: > > Dne 07. 11. 19 v 2:58 Curtis Malainey napsal(a): > > Some userspace audio servers might default to software volume, this > > allows the ucm to force its behaviour > > > > Signed-off-by: Curtis Malainey <cujomalainey@xxxxxxxxxxxx> > > --- > > include/use-case.h | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/include/use-case.h b/include/use-case.h > > index 05628303..1aeaf9d4 100644 > > --- a/include/use-case.h > > +++ b/include/use-case.h > > @@ -334,6 +334,8 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr, > > * - This is used on platform where reported buffer level is not accurate. > > * E.g. "512", which holds 512 samples in device buffer. Note: this will > > * increase latency. > > + * - DisableSoftwareVolume > > + * - Set to "1" to force userspace to use hardware volume controls > > */ > > int snd_use_case_get(snd_use_case_mgr_t *uc_mgr, > > const char *identifier, > > > > > My understanding is that if the hardware volume controls are defined in UCM, > then the UCM user (audio server) should use them. Otherwise, the software > volume control should be applied. I don't see the reason to have this info > doubled. > > Jaroslav > +Jimmy Cheng-Yi Chiang can you clarify in what context CRAS might need this value? The only cases I see are for Chat 150 C and Jabra SPEAK 810. There are no volume mixers associated with these files. > -- > Jaroslav Kysela <perex@xxxxxxxx> > Linux Sound Maintainer; ALSA Project; Red Hat, Inc. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
