[PATCH 4/4] ASoC: wm8904: add DMIC support

[Alifer Moraes <alifer.m@variscite.com>]

From: Pierluigi Passaro <pierluigi.p@variscite.com>

The WM8904 codec supports both ADC and DMIC inputs.
Add dedicated controls to support the additional routing.

Signed-off-by: Pierluigi Passaro <pierluigi.p@variscite.com>
Signed-off by: Alifer Moraes <alifer.m@variscite.com>
---
 sound/soc/codecs/wm8904.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c
index 4121771db104..c7987dc81e4d 100644
--- a/sound/soc/codecs/wm8904.c
+++ b/sound/soc/codecs/wm8904.c
@@ -837,6 +837,26 @@ static int out_pga_event(struct snd_soc_dapm_widget *w,
 	return 0;
 }
 
+static const char *dmic_text[] = {
+	"DMIC1", "DMIC2"
+};
+
+static SOC_ENUM_SINGLE_DECL(dmic_enum,
+			    WM8904_DIGITAL_MICROPHONE_0, 11, dmic_text);
+
+static const struct snd_kcontrol_new dmic_mux =
+	SOC_DAPM_ENUM("DMIC Mux", dmic_enum);
+
+static const char *cin_text[] = {
+	"ADC", "DMIC"
+};
+
+static SOC_ENUM_SINGLE_DECL(cin_enum,
+			    WM8904_DIGITAL_MICROPHONE_0, 12, cin_text);
+
+static const struct snd_kcontrol_new cin_mux =
+	SOC_DAPM_ENUM("Capture Input", cin_enum);
+
 static const char *input_mode_text[] = {
 	"Single-Ended", "Differential Line", "Differential Mic"
 };
@@ -930,6 +950,10 @@ SND_SOC_DAPM_INPUT("IN2R"),
 SND_SOC_DAPM_INPUT("IN3L"),
 SND_SOC_DAPM_INPUT("IN3R"),
 
+SND_SOC_DAPM_MUX("DMIC Mux", SND_SOC_NOPM, 0, 0, &dmic_mux),
+SND_SOC_DAPM_MUX("Left Capture Input", SND_SOC_NOPM, 0, 0, &cin_mux),
+SND_SOC_DAPM_MUX("Right Capture Input", SND_SOC_NOPM, 0, 0, &cin_mux),
+
 SND_SOC_DAPM_SUPPLY("MICBIAS", WM8904_MIC_BIAS_CONTROL_0, 0, 0, NULL, 0),
 
 SND_SOC_DAPM_MUX("Left Capture Mux", SND_SOC_NOPM, 0, 0, &lin_mux),
@@ -1093,11 +1117,21 @@ static const struct snd_soc_dapm_route adc_intercon[] = {
 	{ "AIFOUTL", NULL, "AIFOUTL Mux" },
 	{ "AIFOUTR", NULL, "AIFOUTR Mux" },
 
+	{ "DMIC Mux", "DMIC1", "IN1L" },
+	{ "DMIC Mux", "DMIC2", "IN1R" },
+
+	{ "Left Capture Input", "ADC", "Left Capture PGA" },
+	{ "Left Capture Input", "DMIC", "DMIC Mux" },
+	{ "Right Capture Input", "ADC", "Right Capture PGA" },
+	{ "Right Capture Input", "DMIC", "DMIC Mux" },
+
 	{ "ADCL", NULL, "CLK_DSP" },
 	{ "ADCL", NULL, "Left Capture PGA" },
+	{ "ADCL", NULL, "Left Capture Input" },
 
 	{ "ADCR", NULL, "CLK_DSP" },
 	{ "ADCR", NULL, "Right Capture PGA" },
+	{ "ADCR", NULL, "Right Capture Input" },
 };
 
 static const struct snd_soc_dapm_route dac_intercon[] = {
-- 
2.25.1