[PATCH v2- ALSA 2/3] HDA - create headset mic jack which use headphone pin sense

[Raymond Yau <superquad.vortex2@gmail.com>]

- use __snd_hda_jack_add_kctl to create headset mic jack which use
headphone pin sense

- set headset mic jack as slave of headphone jack

- allow non detectable headset mic pin and hs_mic_use_hp_sense pass check
auto mic availability

Signed-off-by: Raymond Yau <superquad.vortex2@gmail.com>

diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index 24f9111..e8e4e34 100644
--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -4662,7 +4662,9 @@ static int check_auto_mic_availability(struct
hda_codec *codec)
             if (!spec->line_in_auto_switch &&
                 cfg->inputs[i].type != AUTO_PIN_MIC)
                 return 0; /* only mic is allowed */
-            if (!is_jack_detectable(codec, nid))
+            if (!is_jack_detectable(codec, nid) &&
+                !(spec->hs_mic_use_hp_sense &&
+                cfg->inputs[i].is_headset_mic))
                 return 0; /* no unsol support */
             break;
         }
diff --git a/sound/pci/hda/hda_generic.h b/sound/pci/hda/hda_generic.h
index 56e4139..96f8214 100644
--- a/sound/pci/hda/hda_generic.h
+++ b/sound/pci/hda/hda_generic.h
@@ -236,6 +236,7 @@ struct hda_gen_spec {
     unsigned int indep_hp_enabled:1; /* independent HP enabled */
     unsigned int have_aamix_ctl:1;
     unsigned int hp_mic_jack_modes:1;
+    unsigned int hs_mic_use_hp_sense:1;

     /* additional mute flags (only effective with auto_mute_via_amp=1) */
     u64 mute_bits;
diff --git a/sound/pci/hda/hda_jack.c b/sound/pci/hda/hda_jack.c
index d81d65f..c29f05e 100644
--- a/sound/pci/hda/hda_jack.c
+++ b/sound/pci/hda/hda_jack.c
@@ -480,6 +480,10 @@ int snd_hda_jack_add_kctls(struct hda_codec *codec,
                const struct auto_pin_cfg *cfg)
 {
     const hda_nid_t *p;
+    struct hda_jack_tbl *jack;
+    struct hda_gen_spec *spec = codec->spec;
+    hda_nid_t hp_pin = auto_cfg_hp_pins(cfg)[0];
+    hda_nid_t hs_mic_pin = 0;
     int i, err;

     for (i = 0; i < cfg->num_inputs; i++) {
@@ -493,6 +497,13 @@ int snd_hda_jack_add_kctls(struct hda_codec *codec,
                 err = add_jack_kctl(codec, cfg->inputs[i].pin,
                             cfg, "Headphone Mic");
         } else
+        if (cfg->inputs[i].is_headset_mic &&
+            !is_jack_detectable(codec, cfg->inputs[i].pin) &&
+             spec->hs_mic_use_hp_sense) {
+            hs_mic_pin = cfg->inputs[i].pin;
+            err = __snd_hda_jack_add_kctl(codec, cfg->inputs[i].pin,
+                    "Headset Mic", false, hp_pin);
+        } else
             err = add_jack_kctl(codec, cfg->inputs[i].pin, cfg,
                         NULL);
         if (err < 0)
@@ -510,6 +521,11 @@ int snd_hda_jack_add_kctls(struct hda_codec *codec,
         err = add_jack_kctl(codec, *p, cfg, NULL);
         if (err < 0)
             return err;
+        if (*p == hp_pin && spec->hs_mic_use_hp_sense && hs_mic_pin) {
+            jack = snd_hda_jack_tbl_get(codec, *p);
+            if (jack)
+                jack->slave_nid = hs_mic_pin;
+        }
     }
     for (i = 0, p = cfg->speaker_pins; i < cfg->speaker_outs; i++, p++) {
         if (*p == *cfg->line_out_pins) /* might be duplicated */
-- 
2.5.0