Having two DMICs, a front DMIC and a Rear DMIC,
but only host audio input AUX port0 is used for these two Dmics.
A "dmic-gpios" property is used for a mixer control to switch
the dmic signal source between the Front and Rear Dmic.
Refer to this one as an example,
commit 3cfbf07c6d27
("ASoC: qcom: sc7180: Modify machine driver for 2mic")
Signed-off-by: Ajye Huang <ajye_huang@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
.../mt8186/mt8186-mt6366-rt1019-rt5682s.c | 102 +++++++++++++++++-
1 file changed, 101 insertions(+), 1 deletion(-)
diff --git a/sound/soc/mediatek/mt8186/mt8186-mt6366-rt1019-rt5682s.c b/sound/soc/mediatek/mt8186/mt8186-mt6366-rt1019-rt5682s.c
index 2414c5b77233..b5c25d1247be 100644
--- a/sound/soc/mediatek/mt8186/mt8186-mt6366-rt1019-rt5682s.c
+++ b/sound/soc/mediatek/mt8186/mt8186-mt6366-rt1019-rt5682s.c
@@ -7,6 +7,8 @@
// Author: Jiaxin Yu <jiaxin.yu@xxxxxxxxxxxx>
//
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/of_device.h>
@@ -39,6 +41,8 @@
struct mt8186_mt6366_rt1019_rt5682s_priv {
struct snd_soc_jack headset_jack, hdmi_jack;
+ struct gpio_desc *dmic_sel;
+ int dmic_switch;
};
/* Headset jack detection DAPM pins */
@@ -68,6 +72,94 @@ static struct snd_soc_codec_conf mt8186_mt6366_rt1019_rt5682s_codec_conf[] = {
},
};
+static int dmic_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
+ struct mtk_soc_card_data *soc_card_data =
+ snd_soc_card_get_drvdata(dapm->card);
+ struct mt8186_mt6366_rt1019_rt5682s_priv *priv = soc_card_data->mach_priv;
+
+ ucontrol->value.integer.value[0] = priv->dmic_switch;
+ return 0;
+}
+
+static int dmic_set(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
+ struct mtk_soc_card_data *soc_card_data =
+ snd_soc_card_get_drvdata(dapm->card);
+ struct mt8186_mt6366_rt1019_rt5682s_priv *priv = soc_card_data->mach_priv;
+
+ priv->dmic_switch = ucontrol->value.integer.value[0];
+ if (priv->dmic_sel) {
+ gpiod_set_value(priv->dmic_sel, priv->dmic_switch);
+ dev_info(dapm->card->dev, "dmic_set_value %d\n",
+ priv->dmic_switch);
+ }
+ return 0;
+}
+
+static const char * const dmic_mux_text[] = {
+ "FrontMic",
+ "RearMic",
+};
+
+static SOC_ENUM_SINGLE_DECL(mt8186_dmic_enum,
+ SND_SOC_NOPM, 0, dmic_mux_text);
+
+static const struct snd_kcontrol_new mt8186_dmic_mux_control =
+ SOC_DAPM_ENUM_EXT("DMIC Select Mux", mt8186_dmic_enum,
+ dmic_get, dmic_set);
+
+static const struct snd_soc_dapm_widget dmic_widgets[] = {
+ SND_SOC_DAPM_MIC("DMIC", NULL),
+ SND_SOC_DAPM_MUX("Dmic Mux", SND_SOC_NOPM, 0, 0, &mt8186_dmic_mux_control),
+};
+
+static const struct snd_soc_dapm_route dmic_map[] = {
+ /* digital mics */
+ {"Dmic Mux", "FrontMic", "DMIC"},
+ {"Dmic Mux", "RearMic", "DMIC"},
+};
+
+static int primary_codec_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_card *card = rtd->card;
+ struct mtk_soc_card_data *soc_card_data = snd_soc_card_get_drvdata(card);
+ struct mt8186_mt6366_rt1019_rt5682s_priv *priv = soc_card_data->mach_priv;
+ int ret;
+
+ ret = mt8186_mt6366_init(rtd);
+
+ if (ret) {
+ dev_err(card->dev, "mt8186_mt6366_init failed: %d\n", ret);
+ return ret;
+ }
+
+ if (!priv->dmic_sel) {
+ dev_info(card->dev, "dmic_sel is null\n");
+ return ret;
+ }
+
+ ret = snd_soc_dapm_new_controls(&card->dapm, dmic_widgets,
+ ARRAY_SIZE(dmic_widgets));
+ if (ret) {
+ dev_err(card->dev, "DMic widget addition failed: %d\n", ret);
+ /* Don't need to add routes if widget addition failed */
+ return ret;
+ }
+
+ ret = snd_soc_dapm_add_routes(&card->dapm, dmic_map,
+ ARRAY_SIZE(dmic_map));
+
+ if (ret)
+ dev_err(card->dev, "DMic map addition failed: %d\n", ret);
+
+ return ret;
+}
+
static int mt8186_rt5682s_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_component *cmpnt_afe =
@@ -775,7 +867,7 @@ static struct snd_soc_dai_link mt8186_mt6366_rt1019_rt5682s_dai_links[] = {
.dpcm_playback = 1,
.dpcm_capture = 1,
.ignore_suspend = 1,
- .init = mt8186_mt6366_init,
+ .init = primary_codec_init,
SND_SOC_DAILINK_REG(adda),
},
{
@@ -1015,6 +1107,14 @@ static int mt8186_mt6366_rt1019_rt5682s_dev_probe(struct platform_device *pdev)
soc_card_data->mach_priv = mach_priv;
+ mach_priv->dmic_sel = devm_gpiod_get_optional(&pdev->dev,
+ "dmic", GPIOD_OUT_LOW);
+ if (IS_ERR(mach_priv->dmic_sel)) {
+ dev_err(&pdev->dev, "DMIC gpio failed err=%ld\n",
+ PTR_ERR(mach_priv->dmic_sel));
+ return PTR_ERR(mach_priv->dmic_sel);
+ }
+
adsp_node = of_parse_phandle(pdev->dev.of_node, "mediatek,adsp", 0);
if (adsp_node) {
struct mtk_sof_priv *sof_priv;
--
2.25.1
