on some board use enable pin to control dmic start and stop, so add this feature in dmic driver.

Signed-off-by: Lin Huang hl@rock-chips.com --- sound/soc/codecs/Kconfig | 2 +- sound/soc/codecs/dmic.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index ccc5814..dff3586 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -61,7 +61,7 @@ config SND_SOC_ALL_CODECS select SND_SOC_DA7219 if I2C select SND_SOC_DA732X if I2C select SND_SOC_DA9055 if I2C - select SND_SOC_DMIC + select SND_SOC_DMIC if GPIOLIB select SND_SOC_BT_SCO select SND_SOC_ES8328_SPI if SPI_MASTER select SND_SOC_ES8328_I2C if I2C diff --git a/sound/soc/codecs/dmic.c b/sound/soc/codecs/dmic.c index 32b7a48..c4e5f47 100644 --- a/sound/soc/codecs/dmic.c +++ b/sound/soc/codecs/dmic.c @@ -19,6 +19,8 @@ * */

+#include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/module.h> @@ -27,6 +29,39 @@ #include <sound/soc.h> #include <sound/soc-dapm.h>

+struct dmic_priv { + struct gpio_desc *dmic_en; +}; + +static int dmic_daiops_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct snd_soc_codec *codec = dai->codec; + struct dmic_priv *dmic_data = snd_soc_codec_get_drvdata(codec); + + if (!dmic_data->dmic_en) + return 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + gpiod_set_value(dmic_data->dmic_en, 1); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + gpiod_set_value(dmic_data->dmic_en, 0); + break; + } + + return 0; +} + +static const struct snd_soc_dai_ops dmic_dai_ops = { + .trigger = dmic_daiops_trigger, +}; + static struct snd_soc_dai_driver dmic_dai = { .name = "dmic-hifi", .capture = { @@ -38,8 +73,24 @@ static struct snd_soc_dai_driver dmic_dai = { | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE, }, + .ops = &dmic_dai_ops, };

+static int dmic_codec_probe(struct snd_soc_codec *codec) +{ + struct dmic_priv *dmic_data = snd_soc_codec_get_drvdata(codec); + + dmic_data->dmic_en = devm_gpiod_get_optional(codec->dev, + "dmicen", GPIOD_OUT_LOW); + + if (IS_ERR(dmic_data->dmic_en)) + return PTR_ERR(dmic_data->dmic_en); + + snd_soc_codec_set_drvdata(codec, dmic_data); + + return 0; +} + static const struct snd_soc_dapm_widget dmic_dapm_widgets[] = { SND_SOC_DAPM_AIF_OUT("DMIC AIF", "Capture", 0, SND_SOC_NOPM, 0, 0), @@ -51,6 +102,7 @@ static const struct snd_soc_dapm_route intercon[] = { };

static struct snd_soc_codec_driver soc_dmic = { + .probe = dmic_codec_probe, .dapm_widgets = dmic_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(dmic_dapm_widgets), .dapm_routes = intercon, @@ -59,6 +111,15 @@ static struct snd_soc_codec_driver soc_dmic = {

static int dmic_dev_probe(struct platform_device *pdev) { + struct dmic_priv *dmic_data; + + dmic_data = devm_kzalloc(&pdev->dev, sizeof(*dmic_data), GFP_KERNEL); + + if (!dmic_data) + return -ENOMEM; + + dev_set_drvdata(&pdev->dev, dmic_data); + return snd_soc_register_codec(&pdev->dev, &soc_dmic, &dmic_dai, 1); }