ALSA: hda - Add support of dual-ADCs for Realtek ALC275

Some VAIO models with ALC275 have dual ADCs for both internal and external
mics, and the driver needs to switch one of them appropriately.
This patch adds a basic support for this functionality, dynamic switching
between two ADCs per jack plug state.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_realtek.c

@@ -333,6 +333,12 @@ struct alc_spec {
 	hda_nid_t *capsrc_nids;
 	hda_nid_t dig_in_nid;		/* digital-in NID; optional */
 
+	/* capture setup for dynamic dual-adc switch */
+	unsigned int cur_adc_idx;
+	hda_nid_t cur_adc;
+	unsigned int cur_adc_stream_tag;
+	unsigned int cur_adc_format;
+
 	/* capture source */
 	unsigned int num_mux_defs;
 	const struct hda_input_mux *input_mux;
@@ -374,6 +380,7 @@ struct alc_spec {
 
 	/* other flags */
 	unsigned int no_analog :1; /* digital I/O only */
+	unsigned int dual_adc_switch:1; /* switch ADCs (for ALC275) */
 	int init_amp;
 
 	/* for virtual master */
@@ -1010,6 +1017,29 @@ static int get_connection_index(struct hda_codec *codec, hda_nid_t mux,
 	return -1;
 }
 
+/* switch the current ADC according to the jack state */
+static void alc_dual_mic_adc_auto_switch(struct hda_codec *codec)
+{
+	struct alc_spec *spec = codec->spec;
+	unsigned int present;
+	hda_nid_t new_adc;
+
+	present = snd_hda_jack_detect(codec, spec->ext_mic.pin);
+	if (present)
+		spec->cur_adc_idx = 1;
+	else
+		spec->cur_adc_idx = 0;
+	new_adc = spec->adc_nids[spec->cur_adc_idx];
+	if (spec->cur_adc && spec->cur_adc != new_adc) {
+		/* stream is running, let's swap the current ADC */
+		snd_hda_codec_cleanup_stream(codec, spec->cur_adc);
+		spec->cur_adc = new_adc;
+		snd_hda_codec_setup_stream(codec, new_adc,
+					   spec->cur_adc_stream_tag, 0,
+					   spec->cur_adc_format);
+	}
+}
+
 static void alc_mic_automute(struct hda_codec *codec)
 {
 	struct alc_spec *spec = codec->spec;
@@ -1024,6 +1054,11 @@ static void alc_mic_automute(struct hda_codec *codec)
 	if (snd_BUG_ON(!spec->adc_nids))
 		return;
 
+	if (spec->dual_adc_switch) {
+		alc_dual_mic_adc_auto_switch(codec);
+		return;
+	}
+
 	cap_nid = spec->capsrc_nids ? spec->capsrc_nids[0] : spec->adc_nids[0];
 
 	present = snd_hda_jack_detect(codec, spec->ext_mic.pin);
@@ -3614,6 +3649,41 @@ static int alc880_alt_capture_pcm_cleanup(struct hda_pcm_stream *hinfo,
 	return 0;
 }
 
+/* analog capture with dynamic dual-adc changes */
+static int dualmic_capture_pcm_prepare(struct hda_pcm_stream *hinfo,
+				       struct hda_codec *codec,
+				       unsigned int stream_tag,
+				       unsigned int format,
+				       struct snd_pcm_substream *substream)
+{
+	struct alc_spec *spec = codec->spec;
+	spec->cur_adc = spec->adc_nids[spec->cur_adc_idx];
+	spec->cur_adc_stream_tag = stream_tag;
+	spec->cur_adc_format = format;
+	snd_hda_codec_setup_stream(codec, spec->cur_adc, stream_tag, 0, format);
+	return 0;
+}
+
+static int dualmic_capture_pcm_cleanup(struct hda_pcm_stream *hinfo,
+				       struct hda_codec *codec,
+				       struct snd_pcm_substream *substream)
+{
+	struct alc_spec *spec = codec->spec;
+	snd_hda_codec_cleanup_stream(codec, spec->cur_adc);
+	spec->cur_adc = 0;
+	return 0;
+}
+
+static struct hda_pcm_stream dualmic_pcm_analog_capture = {
+	.substreams = 1,
+	.channels_min = 2,
+	.channels_max = 2,
+	.nid = 0, /* fill later */
+	.ops = {
+		.prepare = dualmic_capture_pcm_prepare,
+		.cleanup = dualmic_capture_pcm_cleanup
+	},
+};
 
 /*
  */
@@ -5052,24 +5122,12 @@ static void fixup_automic_adc(struct hda_codec *codec)
 	spec->auto_mic = 0; /* disable auto-mic to be sure */
 }
 
-/* choose the ADC/MUX containing the input pin and initialize the setup */
-static void fixup_single_adc(struct hda_codec *codec)
+/* set the default connection to that pin */
+static int init_capsrc_for_pin(struct hda_codec *codec, hda_nid_t pin)
 {
 	struct alc_spec *spec = codec->spec;
-	hda_nid_t pin = 0;
 	int i;
 
-	/* search for the input pin; there must be only one */
-	for (i = 0; i < AUTO_PIN_LAST; i++) {
-		if (spec->autocfg.input_pins[i]) {
-			pin = spec->autocfg.input_pins[i];
-			break;
-		}
-	}
-	if (!pin)
-		return;
-
-	/* set the default connection to that pin */
 	for (i = 0; i < spec->num_adc_nids; i++) {
 		hda_nid_t cap = spec->capsrc_nids ?
 			spec->capsrc_nids[i] : spec->adc_nids[i];
@@ -5078,11 +5136,6 @@ static void fixup_single_adc(struct hda_codec *codec)
 		idx = get_connection_index(codec, cap, pin);
 		if (idx < 0)
 			continue;
-		/* use only this ADC */
-		if (spec->capsrc_nids)
-			spec->capsrc_nids += i;
-		spec->adc_nids += i;
-		spec->num_adc_nids = 1;
 		/* select or unmute this route */
 		if (get_wcaps_type(get_wcaps(codec, cap)) == AC_WID_AUD_MIX) {
 			snd_hda_codec_amp_stereo(codec, cap, HDA_INPUT, idx,
@@ -5091,10 +5144,45 @@ static void fixup_single_adc(struct hda_codec *codec)
 			snd_hda_codec_write_cache(codec, cap, 0,
 					  AC_VERB_SET_CONNECT_SEL, idx);
 		}
+		return i; /* return the found index */
+	}
+	return -1; /* not found */
+}
+
+/* choose the ADC/MUX containing the input pin and initialize the setup */
+static void fixup_single_adc(struct hda_codec *codec)
+{
+	struct alc_spec *spec = codec->spec;
+	hda_nid_t pin = 0;
+	int i;
+
+	/* search for the input pin; there must be only one */
+	for (i = 0; i < AUTO_PIN_LAST; i++) {
+		if (spec->autocfg.input_pins[i]) {
+			pin = spec->autocfg.input_pins[i];
+			break;
+		}
+	}
+	if (!pin)
 		return;
+	i = init_capsrc_for_pin(codec, pin);
+	if (i >= 0) {
+		/* use only this ADC */
+		if (spec->capsrc_nids)
+			spec->capsrc_nids += i;
+		spec->adc_nids += i;
+		spec->num_adc_nids = 1;
 	}
 }
 
+/* initialize dual adcs */
+static void fixup_dual_adc_switch(struct hda_codec *codec)
+{
+	struct alc_spec *spec = codec->spec;
+	init_capsrc_for_pin(codec, spec->ext_mic.pin);
+	init_capsrc_for_pin(codec, spec->int_mic.pin);
+}
+
 static void set_capture_mixer(struct hda_codec *codec)
 {
 	struct alc_spec *spec = codec->spec;
@@ -5108,7 +5196,10 @@ static void set_capture_mixer(struct hda_codec *codec)
 	};
 	if (spec->num_adc_nids > 0 && spec->num_adc_nids <= 3) {
 		int mux = 0;
-		if (spec->auto_mic)
+		int num_adcs = spec->num_adc_nids;
+		if (spec->dual_adc_switch)
+			fixup_dual_adc_switch(codec);
+		else if (spec->auto_mic)
 			fixup_automic_adc(codec);
 		else if (spec->input_mux) {
 			if (spec->input_mux->num_items > 1)
@@ -5116,7 +5207,9 @@ static void set_capture_mixer(struct hda_codec *codec)
 			else if (spec->input_mux->num_items == 1)
 				fixup_single_adc(codec);
 		}
-		spec->cap_mixer = caps[mux][spec->num_adc_nids - 1];
+		if (spec->dual_adc_switch)
+			num_adcs = 1;
+		spec->cap_mixer = caps[mux][num_adcs - 1];
 	}
 }
 
@@ -14141,6 +14234,36 @@ static int alc269_mic2_mute_check_ps(struct hda_codec *codec, hda_nid_t nid)
 }
 #endif /* CONFIG_SND_HDA_POWER_SAVE */
 
+static int alc275_setup_dual_adc(struct hda_codec *codec)
+{
+	struct alc_spec *spec = codec->spec;
+
+	if (codec->vendor_id != 0x10ec0275 || !spec->auto_mic)
+		return 0;
+	if ((spec->ext_mic.pin >= 0x18 && spec->int_mic.pin <= 0x13) ||
+	    (spec->ext_mic.pin <= 0x12 && spec->int_mic.pin >= 0x18)) {
+		if (spec->ext_mic.pin <= 0x12) {
+			spec->private_adc_nids[0] = 0x08;
+			spec->private_adc_nids[1] = 0x11;
+			spec->private_capsrc_nids[0] = 0x23;
+			spec->private_capsrc_nids[1] = 0x22;
+		} else {
+			spec->private_adc_nids[0] = 0x11;
+			spec->private_adc_nids[1] = 0x08;
+			spec->private_capsrc_nids[0] = 0x22;
+			spec->private_capsrc_nids[1] = 0x23;
+		}
+		spec->adc_nids = spec->private_adc_nids;
+		spec->capsrc_nids = spec->private_capsrc_nids;
+		spec->num_adc_nids = 2;
+		spec->dual_adc_switch = 1;
+		snd_printdd("realtek: enabling dual ADC switchg (%02x:%02x)\n",
+			    spec->adc_nids[0], spec->adc_nids[1]);
+		return 1;
+	}
+	return 0;
+}
+
 /*
  * BIOS auto configuration
  */
@@ -14180,10 +14303,13 @@ static int alc269_parse_auto_config(struct hda_codec *codec)
 
 	spec->num_mux_defs = 1;
 	spec->input_mux = &spec->private_imux[0];
+
+	if (!alc275_setup_dual_adc(codec))
 		fillup_priv_adc_nids(codec, alc269_adc_candidates,
 				     sizeof(alc269_adc_candidates));
 
 	/* set default input source */
+	if (!spec->dual_adc_switch)
 		snd_hda_codec_write_cache(codec, spec->capsrc_nids[0],
 				  0, AC_VERB_SET_CONNECT_SEL,
 				  spec->input_mux->items[0].index);
@@ -14480,6 +14606,10 @@ static int patch_alc269(struct hda_codec *codec)
 		 */
 		spec->stream_analog_playback = &alc269_44k_pcm_analog_playback;
 		spec->stream_analog_capture = &alc269_44k_pcm_analog_capture;
+	} else if (spec->dual_adc_switch) {
+		spec->stream_analog_playback = &alc269_pcm_analog_playback;
+		/* switch ADC dynamically */
+		spec->stream_analog_capture = &dualmic_pcm_analog_capture;
 	} else {
 		spec->stream_analog_playback = &alc269_pcm_analog_playback;
 		spec->stream_analog_capture = &alc269_pcm_analog_capture;