ALSA: hda/realtek - Don't create alt-stream for capture when unnecessary
authorTakashi Iwai <tiwai@suse.de>
Wed, 2 Nov 2011 20:30:51 +0000 (21:30 +0100)
committerTakashi Iwai <tiwai@suse.de>
Wed, 2 Nov 2011 20:30:51 +0000 (21:30 +0100)
commit1fa1757366783fb52e6e85c2d735db49b818d382
treea52f76fa88814741ca293837c9ff8f6e96a4a539
parentad5d8755116b431f0709c745ee17cb567a478d43
ALSA: hda/realtek - Don't create alt-stream for capture when unnecessary

When the driver finds multiple ADCs, it tries to create an alternative
capture PCM stream.  However, these secondary ADCs might be useless or
in uncontrolled paths in some cases, e.g. when auto-mic or dynamic
ADC-switching is enabled.  Also, when only a single capture source is
available, the multi-streams don't make sense, too.

With this patch, the driver checks such condition and skips the alt
stream appropriately.

Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/pci/hda/patch_realtek.c