[alsa-devel] Via VT2020: issues with kernel 2.6.38.{2, 3} (alsa 1.0.23) - working with 2.6.33.2 (alsa 1.0.21)

[alex dot baldacchino dot alsasub at gmail dot com]

2011/6/20 Raymond Yau <superquad.vortex2 at gmail.com>:
> 2011/6/20 alex dot baldacchino dot alsasub at gmail dot com
>>>
>
> Take a look at playback_multi_pcm_prep_0() in patch_via.c , it seem
> this "copy front" mode is enabled by default in via codecs
>
>
>        /* front */
>        snd_hda_codec_setup_stream(codec, nids[HDA_FRONT], stream_tag,
>                                   0, format);
>
>        if (mout->hp_nid && mout->hp_nid != nids[HDA_FRONT]
>            && !spec->hp_independent_mode)
>                /* headphone out will just decode front left/right (stereo) */
>                snd_hda_codec_setup_stream(codec, mout->hp_nid, stream_tag,
>                                           0, format);
>
>        /* extra outputs copied from front */
>        for (i = 0; i < ARRAY_SIZE(mout->extra_out_nid); i++)
>                if (mout->extra_out_nid[i])
>                        snd_hda_codec_setup_stream(codec,
>                                                   mout->extra_out_nid[i],
>                                                   stream_tag, 0, format);
>
>        /* surrounds */
>        for (i = 1; i < mout->num_dacs; i++) {
>                if (chs >= (i + 1) * 2) /* independent out */
>                        snd_hda_codec_setup_stream(codec, nids[i], stream_tag,
>                                                   i * 2, format);
>                else /* copy front */
>                        snd_hda_codec_setup_stream(codec, nids[i], stream_tag,
>                                                   0, format);
>        }
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>

Yes, I had noticed it, but before seeing that line, I went out crazy
thinking mout->extra_out_nid was initialized somewhere in the code (in
the driver) and used in this function... Lastly, I found that place:
Nowhere Land, LOL!

I must be needing some new glasses, LOL.