ALSA: hda - Add auto-mic support for Realtek codecs

Added the support for automatic mic selection via plugging for
Realtek codecs (in auto-probing mode).  The auto-mic mode is enabled
only when one internal mic and one external mic are present.

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

1 files changed, 135 insertions, 42 deletions

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index b0d30fced3f5..678c2d7b7f98 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -258,6 +258,14 @@ enum {
         ALC_INIT_GPIO3,
 };
 
+struct alc_mic_route {
+        hda_nid_t pin;
+        unsigned char mux_idx;
+        unsigned char amix_idx;
+};
+
+#define MUX_IDX_UNDEF   ((unsigned char)-1)
+
 struct alc_spec {
         /* codec parameterization */
         struct snd_kcontrol_new *mixers[5];     /* mixer arrays */
@@ -300,6 +308,8 @@ struct alc_spec {
         unsigned int num_mux_defs;
         const struct hda_input_mux *input_mux;
         unsigned int cur_mux[3];
+        struct alc_mic_route ext_mic;
+        struct alc_mic_route int_mic;
 
         /* channel model */
         const struct hda_channel_mode *channel_mode;
@@ -327,6 +337,7 @@ struct alc_spec {
         unsigned int sense_updated: 1;
         unsigned int jack_present: 1;
         unsigned int master_sw: 1;
+        unsigned int auto_mic:1;
 
         /* other flags */
         unsigned int no_analog :1; /* digital I/O only */
@@ -963,30 +974,79 @@ static void alc_automute_pin(struct hda_codec *codec)
         }
 }
 
-#if 0 /* it's broken in some cases -- temporarily disabled */
+static int get_connection_index(struct hda_codec *codec, hda_nid_t mux,
+                                hda_nid_t nid)
+{
+        hda_nid_t conn[HDA_MAX_NUM_INPUTS];
+        int i, nums;
+
+        nums = snd_hda_get_connections(codec, mux, conn, ARRAY_SIZE(conn));
+        for (i = 0; i < nums; i++)
+                if (conn[i] == nid)
+                        return i;
+        return -1;
+}
+
+static int set_mic_mux_idx(struct hda_codec *codec, hda_nid_t cap,
+                           struct alc_mic_route *mic)
+{
+        int idx = get_connection_index(codec, cap, mic->pin);
+        if (idx < 0)
+                return 1; /* invalid */
+        mic->mux_idx = idx;
+        return 0;
+}
+
 static void alc_mic_automute(struct hda_codec *codec)
 {
         struct alc_spec *spec = codec->spec;
-        unsigned int present;
-        unsigned int mic_nid = spec->autocfg.input_pins[AUTO_PIN_MIC];
-        unsigned int fmic_nid = spec->autocfg.input_pins[AUTO_PIN_FRONT_MIC];
-        unsigned int mix_nid = spec->capsrc_nids[0];
-        unsigned int capsrc_idx_mic, capsrc_idx_fmic;
-
-        capsrc_idx_mic = mic_nid - 0x18;
-        capsrc_idx_fmic = fmic_nid - 0x18;
-        present = snd_hda_codec_read(codec, mic_nid, 0,
-                                     AC_VERB_GET_PIN_SENSE, 0) & 0x80000000;
-        snd_hda_codec_write(codec, mix_nid, 0, AC_VERB_SET_AMP_GAIN_MUTE,
-                    0x7000 | (capsrc_idx_mic << 8) | (present ? 0 : 0x80));
-        snd_hda_codec_write(codec, mix_nid, 0, AC_VERB_SET_AMP_GAIN_MUTE,
-                    0x7000 | (capsrc_idx_fmic << 8) | (present ? 0x80 : 0));
-        snd_hda_codec_amp_stereo(codec, 0x0b, HDA_INPUT, capsrc_idx_fmic,
-                         HDA_AMP_MUTE, present ? HDA_AMP_MUTE : 0);
+        struct alc_mic_route *dead, *alive;
+        unsigned int present, type;
+        hda_nid_t cap_nid;
+
+        if (!spec->int_mic.pin || !spec->ext_mic.pin)
+                return;
+        if (snd_BUG_ON(!spec->adc_nids))
+                return;
+
+        cap_nid = spec->capsrc_nids ? spec->capsrc_nids[0] : spec->adc_nids[0];
+
+        present = snd_hda_codec_read(codec, spec->ext_mic.pin, 0,
+                                     AC_VERB_GET_PIN_SENSE, 0);
+        present &= AC_PINSENSE_PRESENCE;
+        if (present) {
+                alive = &spec->ext_mic;
+                dead = &spec->int_mic;
+        } else {
+                alive = &spec->int_mic;
+                dead = &spec->ext_mic;
+        }
+
+        if (alive->mux_idx == MUX_IDX_UNDEF &&
+            set_mic_mux_idx(codec, cap_nid, alive))
+                return;
+        if (dead->mux_idx == MUX_IDX_UNDEF &&
+            set_mic_mux_idx(codec, cap_nid, dead))
+                return;
+
+        type = get_wcaps_type(get_wcaps(codec, cap_nid));
+        if (type == AC_WID_AUD_MIX) {
+                /* Matrix-mixer style (e.g. ALC882) */
+                snd_hda_codec_amp_stereo(codec, cap_nid, HDA_INPUT,
+                                         alive->mux_idx,
+                                         HDA_AMP_MUTE, 0);
+                snd_hda_codec_amp_stereo(codec, cap_nid, HDA_INPUT,
+                                         dead->mux_idx,
+                                         HDA_AMP_MUTE, HDA_AMP_MUTE);
+        } else {
+                /* MUX style (e.g. ALC880) */
+                snd_hda_codec_write_cache(codec, cap_nid, 0,
+                                          AC_VERB_SET_CONNECT_SEL,
+                                          alive->mux_idx);
+        }
+
+        /* FIXME: analog mixer */
 }
-#else
-#define alc_mic_automute(codec) do {} while(0) /* NOP */
-#endif /* disabled */
 
 /* unsolicited event for HP jack sensing */
 static void alc_sku_unsol_event(struct hda_codec *codec, unsigned int res)
@@ -1142,6 +1202,55 @@ static void alc_init_auto_hp(struct hda_codec *codec)
         spec->unsol_event = alc_sku_unsol_event;
 }
 
+static void alc_init_auto_mic(struct hda_codec *codec)
+{
+        struct alc_spec *spec = codec->spec;
+        struct auto_pin_cfg *cfg = &spec->autocfg;
+        hda_nid_t fixed, ext;
+        int i;
+
+        /* there must be only two mic inputs exclusively */
+        for (i = AUTO_PIN_LINE; i < AUTO_PIN_LAST; i++)
+                if (cfg->input_pins[i])
+                        return;
+
+        fixed = ext = 0;
+        for (i = AUTO_PIN_MIC; i <= AUTO_PIN_FRONT_MIC; i++) {
+                hda_nid_t nid = cfg->input_pins[i];
+                unsigned int defcfg;
+                if (!nid)
+                        return;
+                defcfg = snd_hda_codec_get_pincfg(codec, nid);
+                switch (get_defcfg_connect(defcfg)) {
+                case AC_JACK_PORT_FIXED:
+                        if (fixed)
+                                return; /* already occupied */
+                        fixed = nid;
+                        break;
+                case AC_JACK_PORT_COMPLEX:
+                        if (ext)
+                                return; /* already occupied */
+                        ext = nid;
+                        break;
+                default:
+                        return; /* invalid entry */
+                }
+        }
+        if (!(get_wcaps(codec, ext) & AC_WCAP_UNSOL_CAP))
+                return; /* no unsol support */
+        snd_printdd("realtek: Enable auto-mic switch on NID 0x%x/0x%x\n",
+                    ext, fixed);
+        spec->ext_mic.pin = ext;
+        spec->int_mic.pin = fixed;
+        spec->ext_mic.mux_idx = MUX_IDX_UNDEF; /* set later */
+        spec->int_mic.mux_idx = MUX_IDX_UNDEF; /* set later */
+        spec->auto_mic = 1;
+        snd_hda_codec_write_cache(codec, spec->ext_mic.pin, 0,
+                                  AC_VERB_SET_UNSOLICITED_ENABLE,
+                                  AC_USRSP_EN | ALC880_MIC_EVENT);
+        spec->unsol_event = alc_sku_unsol_event;
+}
+
 /* check subsystem ID and set up device-specific initialization;
  * return 1 if initialized, 0 if invalid SSID
  */
@@ -1243,6 +1352,7 @@ do_sku:
         }
 
         alc_init_auto_hp(codec);
+        alc_init_auto_mic(codec);
         return 1;
 }
 
@@ -1255,6 +1365,7 @@ static void alc_ssid_check(struct hda_codec *codec,
                            "Enable default setup for auto mode as fallback\n");
                 spec->init_amp = ALC_INIT_DEFAULT;
                 alc_init_auto_hp(codec);
+                alc_init_auto_mic(codec);
         }
 }
 
@@ -4572,7 +4683,8 @@ static void set_capture_mixer(struct alc_spec *spec)
         };
         if (spec->num_adc_nids > 0 && spec->num_adc_nids <= 3) {
                 int mux;
-                if (spec->input_mux && spec->input_mux->num_items > 1)
+                if (spec->input_mux && spec->input_mux->num_items > 1 &&
+                    !spec->auto_mic)
                         mux = 1;
                 else
                         mux = 0;
@@ -17118,25 +17230,6 @@ static int alc662_auto_create_extra_out(struct alc_spec *spec, hda_nid_t pin,
         return 0;
 }
 
-/* return the index of the src widget from the connection list of the nid.
- * return -1 if not found
- */
-static int alc662_input_pin_idx(struct hda_codec *codec, hda_nid_t nid,
-                                hda_nid_t src)
-{
-        hda_nid_t conn_list[HDA_MAX_CONNECTIONS];
-        int i, conns;
-
-        conns = snd_hda_get_connections(codec, nid, conn_list,
-                                        ARRAY_SIZE(conn_list));
-        if (conns < 0)
-                return -1;
-        for (i = 0; i < conns; i++)
-                if (conn_list[i] == src)
-                        return i;
-        return -1;
-}
-
 static int alc662_is_input_pin(struct hda_codec *codec, hda_nid_t nid)
 {
         unsigned int pincap = snd_hda_query_pin_caps(codec, nid);
@@ -17153,7 +17246,7 @@ static int alc662_auto_create_analog_input_ctls(struct hda_codec *codec,
 
         for (i = 0; i < AUTO_PIN_LAST; i++) {
                 if (alc662_is_input_pin(codec, cfg->input_pins[i])) {
-                        idx = alc662_input_pin_idx(codec, 0x0b,
+                        idx = get_connection_index(codec, 0x0b,
                                                    cfg->input_pins[i]);
                         if (idx >= 0) {
                                 err = new_analog_input(spec, cfg->input_pins[i],
@@ -17162,7 +17255,7 @@ static int alc662_auto_create_analog_input_ctls(struct hda_codec *codec,
                                 if (err < 0)
                                         return err;
                         }
-                        idx = alc662_input_pin_idx(codec, 0x22,
+                        idx = get_connection_index(codec, 0x22,
                                                    cfg->input_pins[i]);
                         if (idx >= 0) {
                                 imux->items[imux->num_items].label =