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Subject[PATCH v1 2/2] ASoC: qcom: sc7180: Modify machine driver for 2mic
Date
In addition, having mixer control to switch between DMICs for
"qcom,sc7180-sndcard-rt5682-m98357-2mic" 2mic case.

Refer to this one as an example,
commit b7a742cff3f6 ("ASoC: AMD: Use mixer control to switch between DMICs")

Signed-off-by: Ajye Huang <ajye_huang@compal.corp-partner.google.com>
---
This patch depends on this patch series
https://patchwork.kernel.org/patch/11773223/ .


sound/soc/qcom/sc7180.c | 60 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 60 insertions(+)

diff --git a/sound/soc/qcom/sc7180.c b/sound/soc/qcom/sc7180.c
index 0e90448523b0..c8751fb9f9bf 100644
--- a/sound/soc/qcom/sc7180.c
+++ b/sound/soc/qcom/sc7180.c
@@ -5,6 +5,8 @@
// sc7180.c -- ALSA SoC Machine driver for SC7180

#include <dt-bindings/sound/sc7180-lpass.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
@@ -24,6 +26,9 @@
// This will be defined in include/dt-bindings/sound/sc7180-lpass.h
#define LPASS_DP_RX 2

+static struct gpio_desc *dmic_sel;
+static int dmic_switch;
+
struct sc7180_snd_data {
struct snd_soc_card card;
u32 pri_mi2s_clk_count;
@@ -170,6 +175,23 @@ static int sc7180_snd_startup(struct snd_pcm_substream *substream)
return 0;
}

+static int dmic_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ ucontrol->value.integer.value[0] = dmic_switch;
+ return 0;
+}
+
+static int dmic_set(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ if (dmic_sel) {
+ dmic_switch = ucontrol->value.integer.value[0];
+ gpiod_set_value(dmic_sel, dmic_switch);
+ }
+ return 0;
+}
+
static void sc7180_snd_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
@@ -207,6 +229,30 @@ static const struct snd_soc_dapm_widget sc7180_snd_widgets[] = {
SND_SOC_DAPM_MIC("Headset Mic", NULL),
};

+static const char * const dmic_mux_text[] = {
+ "Front Mic",
+ "Rear Mic",
+};
+
+static SOC_ENUM_SINGLE_DECL(sc7180_dmic_enum,
+ SND_SOC_NOPM, 0, dmic_mux_text);
+
+static const struct snd_kcontrol_new sc7180_dmic_mux_control =
+ SOC_DAPM_ENUM_EXT("DMIC Select Mux", sc7180_dmic_enum,
+ dmic_get, dmic_set);
+
+static const struct snd_soc_dapm_widget sc7180_snd_dual_mic_widgets[] = {
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_MIC("Headset Mic", NULL),
+ SND_SOC_DAPM_MIC("DMIC", NULL),
+ SND_SOC_DAPM_MUX("Dmic Mux", SND_SOC_NOPM, 0, 0, &sc7180_dmic_mux_control),
+};
+
+static const struct snd_soc_dapm_route sc7180_snd_dual_mic_audio_route[] = {
+ {"Dmic Mux", "Front Mic", "DMIC"},
+ {"Dmic Mux", "Rear Mic", "DMIC"},
+};
+
static void sc7180_add_ops(struct snd_soc_card *card)
{
struct snd_soc_dai_link *link;
@@ -238,6 +284,19 @@ static int sc7180_snd_platform_probe(struct platform_device *pdev)
card->dapm_widgets = sc7180_snd_widgets;
card->num_dapm_widgets = ARRAY_SIZE(sc7180_snd_widgets);

+ if (of_device_is_compatible(dev->of_node, "qcom,sc7180-sndcard-rt5682-m98357-2mic")) {
+ card->dapm_widgets = sc7180_snd_dual_mic_widgets,
+ card->num_dapm_widgets = ARRAY_SIZE(sc7180_snd_dual_mic_widgets),
+ card->dapm_routes = sc7180_snd_dual_mic_audio_route,
+ card->num_dapm_routes = ARRAY_SIZE(sc7180_snd_dual_mic_audio_route),
+ dmic_sel = devm_gpiod_get(&pdev->dev, "dmic", GPIOD_OUT_LOW);
+ if (IS_ERR(dmic_sel)) {
+ dev_err(&pdev->dev, "DMIC gpio failed err=%d\n",
+ PTR_ERR(dmic_sel));
+ return PTR_ERR(dmic_sel);
+ }
+ }
+
ret = qcom_snd_parse_of(card);
if (ret)
return ret;
@@ -249,6 +308,7 @@ static int sc7180_snd_platform_probe(struct platform_device *pdev)

static const struct of_device_id sc7180_snd_device_id[] = {
{ .compatible = "qcom,sc7180-sndcard-rt5682-m98357-1mic" },
+ { .compatible = "qcom,sc7180-sndcard-rt5682-m98357-2mic" },
{},
};
MODULE_DEVICE_TABLE(of, sc7180_snd_device_id);
--
2.25.1
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