ALSA: hda - Fix detection of dual headphones

The dual-headphone mode with STAC/IDT codecs is useful only for machines
that have two (or more) built-in headphones.

But, some HP laptops give multiple headphone pin configs, one for the
built-in and another for the separate (likely a docking station) one.
This results in a missing speaker volume control.

This patch adds more check for the dual-headphone mode to avoid this
problem.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 21 insertions, 2 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index d83649c25fb2..39001c47e627 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -3635,6 +3635,26 @@ static void stac92xx_auto_init_hp_out(struct hda_codec *codec)
         }
 }
 
+static int is_dual_headphones(struct hda_codec *codec)
+{
+        struct sigmatel_spec *spec = codec->spec;
+        int i, valid_hps;
+
+        if (spec->autocfg.line_out_type != AUTO_PIN_SPEAKER_OUT ||
+            spec->autocfg.hp_outs <= 1)
+                return 0;
+        valid_hps = 0;
+        for (i = 0; i < spec->autocfg.hp_outs; i++) {
+                hda_nid_t nid = spec->autocfg.hp_pins[i];
+                unsigned int cfg = snd_hda_codec_get_pincfg(codec, nid);
+                if (get_defcfg_location(cfg) & AC_JACK_LOC_SEPARATE)
+                        continue;
+                valid_hps++;
+        }
+        return (valid_hps > 1);
+}
+
+
 static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out, hda_nid_t dig_in)
 {
         struct sigmatel_spec *spec = codec->spec;
@@ -3651,8 +3671,7 @@ static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out
         /* If we have no real line-out pin and multiple hp-outs, HPs should
          * be set up as multi-channel outputs.
          */
-        if (spec->autocfg.line_out_type == AUTO_PIN_SPEAKER_OUT &&
-            spec->autocfg.hp_outs > 1) {
+        if (is_dual_headphones(codec)) {
                 /* Copy hp_outs to line_outs, backup line_outs in
                  * speaker_outs so that the following routines can handle
                  * HP pins as primary outputs.