[alsa-devel] [PATCH] ALSA: hda - Fix wrong detection of "Headphone+LO" or "Speaker+LO"

[Ingo Brückl]

David Henningsson wrote on Tue, 03 Mar 2015 14:24:28 +0100:

> If I understand correctly, you have three DACs, one internal speaker,
> one headphone jack, and three jacks that are both used for 5.1 surround
> and line out/mic/line in. Is this correct?

This is correct. In addition I have a front mic jack.

> How do the DACs get assigned in this case? One would assume that you'd
> get 02 -> Front LO, HP, Speaker, 03 -> Rear LO, 04 -> CLFE LO.

With my private patch to enforce multi-io I seem to lose the internal speaker
which isn't bad because it isn't connected (and probably never won't be).

You are right concerning the remaining assignments:

multi_outs = 14/0/0/0 : 2/3/4/0 (type LO)
  out path: depth=3 '02:0c:14'
multi_ios(2) = 1a/18 : 3/4
  mio path: depth=3 '03:0d:1a'
  mio path: depth=3 '04:0e:18'
hp_outs = 1b/0/0/0 : 2/0/0/0
  hp  path: depth=3 '02:0c:1b'
spk_outs = 15/0/0/0 : 0/0/0/0

> And then the volume/mute control for DAC node 02 would be called "PCM"
> (since both hp_lo_shared and spk_lo_shared are true), but in fact it would
> be more appropriate to call it "Front".

I've got a Master that would only affect the Front (PCM) and a PCM that
affected Surround/CLFE which was very unpleasant.

With the patch I'm getting a real Master (for all Front/Surround/CLFE) and a
separate Front Volume Control in addition to Surround, Center and LFE which
is exactly how it should be.

> Anyhow, I'd say that the typical case where we want the "Headphone+LO"
> names is where we have only one LO, and then multiout.num_dacs would be
> 1, not 2. (I think, it was a while since I looked into that part of the
> driver...)

I'm fine with everything below 3. :-) Just tell me.

Ingo