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ALSA: hda - Fix the detection of "Loopback Mixing" control for VIA codecs 

Currently the driver checks only the out_mix_path[] for the primary
output route for judging whether to create the loopback-mixing control
or not.  But, there are cases where aamix-routing is available only on
headphone or speaker paths but not on the primary output path.  So, the
driver ignores such cases inappropriately.

This patch fixes the check of the loopback-mixing control by testing
all mix-routing paths.

Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-01-10 15:16:02 +01:00
parent 3a90274de3
commit 4808d12d1d
1 changed files with 4 additions and 1 deletions
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5
sound/pci/hda/patch_via.c
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@ -2208,7 +2208,10 @@ static int via_auto_create_loopback_switch(struct hda_codec *codec)
{
struct via_spec *spec = codec->spec;
if (!spec->aa_mix_nid || !spec->out_mix_path.depth)
if (!spec->aa_mix_nid)
return 0; /* no loopback switching available */
if (!(spec->out_mix_path.depth || spec->hp_mix_path.depth ||
spec->speaker_path.depth))
return 0; /* no loopback switching available */
if (!via_clone_control(spec, &via_aamix_ctl_enum))
return -ENOMEM;