Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752651AbdHKHbi (ORCPT ); Fri, 11 Aug 2017 03:31:38 -0400 Received: from mail-pf0-f195.google.com ([209.85.192.195]:37474 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751492AbdHKHbh (ORCPT ); Fri, 11 Aug 2017 03:31:37 -0400 From: Lin Huang To: broonie@kernel.org, arnaud.pouliquen@st.com, dgreif@chromium.org Cc: perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, briannorris@chromium.org, dianders@chromium.org, lgirdwood@gmail.com, Lin Huang Subject: [PATCH 1/2] ASoC: codec: use enable pin to control dmic start and stop Date: Fri, 11 Aug 2017 15:31:28 +0800 Message-Id: <1502436689-21123-1-git-send-email-hl@rock-chips.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3368 Lines: 126 on some board use enable pin to control dmic start and stop, so add this feature in dmic driver. Signed-off-by: Lin Huang --- 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 +#include #include #include #include @@ -27,6 +29,39 @@ #include #include +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); } -- 2.7.4