Messages in this thread | | | Date | Tue, 04 Jul 2006 17:55:25 +0200 | From | Takashi Iwai <> | Subject | Re: [Alsa-devel] sound connector detection |
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At Mon, 03 Jul 2006 15:30:14 +0200, Johannes Berg wrote: > > > > I am not too happy with putting this kind of switches into input layer, > > it should be reserved for "real" buttons, ones that user can explicitely > > push or toggle (lid switch is on the edge here but it and sleep button > > are used for similar purposes so it makes sense to have it in input layer > > too). But "cable X connected" kind of events is too much [for input layer, > > there could well be a separate layer for it]. If we go this way we'd have > > to move cable detection code from network to input layer as well ;) > > I sort of see the point. But I think it is indeed unfortunate that we > have all these events scattered throughout. I could live with the > current approach abusing the alsa mixer API, but there's little point in > making that element user-visible. So maybe I just need some new alsa > definitions here.
Such a control element doesn't have to be IFACE_MIXER if you want to hide. You can use IFACE_CARD, for example, for a card-specific element but not belonging to the mixer component.
> Although, come to think of it, a daemon keeping the mixer open blocks > unloading the module. I suppose I'd rather have it the other way around > like the eventdev system does -- the device goes away and all reads to > it fail.
That's true. OTOH, invoking a command at each time isn't always a good solution, depending on the event-frequency and heaviness.
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