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Subject[PATCH] ASoc: amd: Add DMIC switch capability to machine driver
Date
Switch between DMIC0 and DMIC1 based on recording device selected.
This is done by toggling the dmic select gpio.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
---
sound/soc/amd/acp3x-rt5682-max9836.c | 53 ++++++++++++++++++++++++----
1 file changed, 47 insertions(+), 6 deletions(-)

diff --git a/sound/soc/amd/acp3x-rt5682-max9836.c b/sound/soc/amd/acp3x-rt5682-max9836.c
index 96fbcd29e3ed..511b8b1722aa 100644
--- a/sound/soc/amd/acp3x-rt5682-max9836.c
+++ b/sound/soc/amd/acp3x-rt5682-max9836.c
@@ -12,6 +12,7 @@
#include <sound/jack.h>
#include <linux/clk.h>
#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/input.h>
@@ -27,6 +28,7 @@
static struct snd_soc_jack pco_jack;
static struct clk *rt5682_dai_wclk;
static struct clk *rt5682_dai_bclk;
+static struct gpio_desc *dmic_sel;

static int acp3x_5682_init(struct snd_soc_pcm_runtime *rtd)
{
@@ -176,7 +178,7 @@ static int acp3x_max_startup(struct snd_pcm_substream *substream)
return rt5682_clk_enable(substream);
}

-static int acp3x_ec_startup(struct snd_pcm_substream *substream)
+static int acp3x_ec_dmic0_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_card *card = rtd->card;
@@ -185,6 +187,23 @@ static int acp3x_ec_startup(struct snd_pcm_substream *substream)

machine->cap_i2s_instance = I2S_BT_INSTANCE;
snd_soc_dai_set_bclk_ratio(codec_dai, 64);
+ if (dmic_sel)
+ gpiod_set_value(dmic_sel, 0);
+
+ return rt5682_clk_enable(substream);
+}
+
+static int acp3x_ec_dmic1_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_card *card = rtd->card;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct acp3x_platform_info *machine = snd_soc_card_get_drvdata(card);
+
+ machine->cap_i2s_instance = I2S_BT_INSTANCE;
+ snd_soc_dai_set_bclk_ratio(codec_dai, 64);
+ if (dmic_sel)
+ gpiod_set_value(dmic_sel, 1);

return rt5682_clk_enable(substream);
}
@@ -204,8 +223,13 @@ static const struct snd_soc_ops acp3x_max_play_ops = {
.shutdown = rt5682_shutdown,
};

-static const struct snd_soc_ops acp3x_ec_cap_ops = {
- .startup = acp3x_ec_startup,
+static const struct snd_soc_ops acp3x_ec_cap0_ops = {
+ .startup = acp3x_ec_dmic0_startup,
+ .shutdown = rt5682_shutdown,
+};
+
+static const struct snd_soc_ops acp3x_ec_cap1_ops = {
+ .startup = acp3x_ec_dmic1_startup,
.shutdown = rt5682_shutdown,
};

@@ -246,12 +270,21 @@ static struct snd_soc_dai_link acp3x_dai_5682_98357[] = {
SND_SOC_DAILINK_REG(acp3x_bt, max, platform),
},
{
- .name = "acp3x-ec-capture",
- .stream_name = "Capture",
+ .name = "acp3x-ec-dmic0-capture",
+ .stream_name = "Capture DMIC0",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
+ | SND_SOC_DAIFMT_CBS_CFS,
+ .dpcm_capture = 1,
+ .ops = &acp3x_ec_cap0_ops,
+ SND_SOC_DAILINK_REG(acp3x_bt, cros_ec, platform),
+ },
+ {
+ .name = "acp3x-ec-dmic1-capture",
+ .stream_name = "Capture DMIC1",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBS_CFS,
.dpcm_capture = 1,
- .ops = &acp3x_ec_cap_ops,
+ .ops = &acp3x_ec_cap1_ops,
SND_SOC_DAILINK_REG(acp3x_bt, cros_ec, platform),
},
};
@@ -302,6 +335,14 @@ static int acp3x_probe(struct platform_device *pdev)
acp3x_card.dev = &pdev->dev;
platform_set_drvdata(pdev, card);
snd_soc_card_set_drvdata(card, machine);
+
+ 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 = devm_snd_soc_register_card(&pdev->dev, &acp3x_card);
if (ret) {
dev_err(&pdev->dev,
--
2.17.1
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