ALSA: hda - Fix aamix activation with loopback control on VIA codecs

When we have a loopback mixer control, this should manage the state
whether the output paths include the aamix or not.  But the current
code blindly initializes the output paths with aamix = true, thus the
aamix is enabled unless the loopback mixer control is changed.

Also, update_aamix_paths() called by the loopback mixer control put
callback invokes snd_hda_activate_path() with aamix = true even for
disabling the mixing.  This leaves the aamix path even though the
loopback control is turned off.

This patch fixes these issues:
- Introduced aamix_default() helper to indicate whether with_aamix is
  true or false as default
- Fix the argument in update_aamix_paths() for disabling loopback

Reported-by: Lydia Wang <LydiaWang@viatech.com.cn>
Cc: <stable@vger.kernel.org> [v3.9+]
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 16 insertions, 6 deletions

diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index c7b59ddc4bce..b964e09cdec6 100644
--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -2082,6 +2082,14 @@ get_multiio_path(struct hda_codec *codec, int idx)
 
 static void update_automute_all(struct hda_codec *codec);
 
+/* Default value to be passed as aamix argument for snd_hda_activate_path();
+ * used for output paths
+ */
+static bool aamix_default(struct hda_gen_spec *spec)
+{
+        return !spec->have_aamix_ctl || spec->aamix_mode;
+}
+
 static int set_multi_io(struct hda_codec *codec, int idx, bool output)
 {
         struct hda_gen_spec *spec = codec->spec;
@@ -2097,11 +2105,11 @@ static int set_multi_io(struct hda_codec *codec, int idx, bool output)
 
         if (output) {
                 set_pin_target(codec, nid, PIN_OUT, true);
-                snd_hda_activate_path(codec, path, true, true);
+                snd_hda_activate_path(codec, path, true, aamix_default(spec));
                 set_pin_eapd(codec, nid, true);
         } else {
                 set_pin_eapd(codec, nid, false);
-                snd_hda_activate_path(codec, path, false, true);
+                snd_hda_activate_path(codec, path, false, aamix_default(spec));
                 set_pin_target(codec, nid, spec->multi_io[idx].ctl_in, true);
                 path_power_down_sync(codec, path);
         }
@@ -2192,8 +2200,8 @@ static void update_aamix_paths(struct hda_codec *codec, bool do_mix,
                 snd_hda_activate_path(codec, mix_path, true, true);
                 path_power_down_sync(codec, nomix_path);
         } else {
-                snd_hda_activate_path(codec, mix_path, false, true);
-                snd_hda_activate_path(codec, nomix_path, true, true);
+                snd_hda_activate_path(codec, mix_path, false, false);
+                snd_hda_activate_path(codec, nomix_path, true, false);
                 path_power_down_sync(codec, mix_path);
         }
 }
@@ -4923,7 +4931,8 @@ static void set_output_and_unmute(struct hda_codec *codec, int path_idx)
                 return;
         pin = path->path[path->depth - 1];
         restore_pin_ctl(codec, pin);
-        snd_hda_activate_path(codec, path, path->active, true);
+        snd_hda_activate_path(codec, path, path->active,
+                              aamix_default(codec->spec));
         set_pin_eapd(codec, pin, path->active);
 }
 
@@ -4973,7 +4982,8 @@ static void init_multi_io(struct hda_codec *codec)
                 if (!spec->multi_io[i].ctl_in)
                         spec->multi_io[i].ctl_in =
                                 snd_hda_codec_get_pin_target(codec, pin);
-                snd_hda_activate_path(codec, path, path->active, true);
+                snd_hda_activate_path(codec, path, path->active,
+                                      aamix_default(spec));
         }
 }