ASoC: intel: byt: Introduce new map for dual mics

The RT5651 codec has 3 analog inputs. Some laptops have two different
internal analog microphones on the external case.
Add a new custom quirk mapping the two internal mics on IN1P / IN2P,
leaving the headset mic on IN3P.
Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/bytcr_rt5651.c

@@ -38,6 +38,7 @@ enum {
 	BYT_RT5651_DMIC_MAP,
 	BYT_RT5651_IN1_MAP,
 	BYT_RT5651_IN2_MAP,
+	BYT_RT5651_IN1_IN2_MAP,
 };
 
 #define BYT_RT5651_MAP(quirk)	((quirk) & GENMASK(7, 0))
@@ -171,6 +172,13 @@ static const struct snd_soc_dapm_route byt_rt5651_intmic_in2_map[] = {
 	{"IN2P", NULL, "Internal Mic"},
 };
 
+static const struct snd_soc_dapm_route byt_rt5651_intmic_in1_in2_map[] = {
+	{"Internal Mic", NULL, "micbias1"},
+	{"IN1P", NULL, "Internal Mic"},
+	{"IN2P", NULL, "Internal Mic"},
+	{"IN3P", NULL, "Headset Mic"},
+};
+
 static const struct snd_kcontrol_new byt_rt5651_controls[] = {
 	SOC_DAPM_PIN_SWITCH("Headphone"),
 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
@@ -281,6 +289,10 @@ static int byt_rt5651_init(struct snd_soc_pcm_runtime *runtime)
 		custom_map = byt_rt5651_intmic_in2_map;
 		num_routes = ARRAY_SIZE(byt_rt5651_intmic_in2_map);
 		break;
+	case BYT_RT5651_IN1_IN2_MAP:
+		custom_map = byt_rt5651_intmic_in1_in2_map;
+		num_routes = ARRAY_SIZE(byt_rt5651_intmic_in1_in2_map);
+		break;
 	default:
 		custom_map = byt_rt5651_intmic_dmic_map;
 		num_routes = ARRAY_SIZE(byt_rt5651_intmic_dmic_map);