At Thu, 05 Apr 2012 15:29:56 +0200, Michael Karcher wrote:
A selector widget with AC_WCAP_IN_AMP has multiple input amplifiers (if the selector widget would have only one common amp, it would be labeled as "output amplifier" instead). This is just like mixer widgets.
If a non-mixer/selector widget has an input amplifier, it is only one input amplifier, even if it has a connection list with more than one entry. The implied selector is placed before the single input amplifier.
At least that is how I read the HDA specs, and what Conexant implements in their CX20549 codec.
It's rather cx20549-specific behavior. If you take a look at the BIOS auto-parser, spec->single_adc_amp is set as a workaround.
Yes, the proc file output should be fixed as well, but you can't change it globally for all codecs.
Takashi
diff --git a/sound/pci/hda/hda_proc.c b/sound/pci/hda/hda_proc.c index 254ab52..9b942f0 100644 --- a/sound/pci/hda/hda_proc.c +++ b/sound/pci/hda/hda_proc.c @@ -653,7 +653,7 @@ static void print_codec_info(struct snd_info_entry *entry, snd_iprintf(buffer, " Amp-In vals: "); print_amp_vals(buffer, codec, nid, HDA_INPUT, wid_caps & AC_WCAP_STEREO,
wid_type == AC_WID_PIN ? 1 : conn_len);
(wid_type == AC_WID_AUD_SEL || wid_type == AC_WID_AUD_MIX) ? conn_len : 1);-- 1.7.9.1