On Realtek codecs, a digital mic pin is connected often only to a single
ADC. But the parser tries to set up all ADCs no matter whether the
digital mic is available, and results in non-selectable input source.
This patch adds a check of input-source availability of each ADC, and
excludes ones that don't support all input sources.
Reference: Novell bnc#561235
http://bugzilla.novell.com/show_bug.cgi?id=561235
Signed-off-by: Takashi Iwai <tiwai@suse.de>
d11f74c62f