This patch adds support to toggle mute on 'line-out' pin on Dell Edge IoT Gateways. A dedicated GPIO on the SoC is used to control the amplifier. This GPIO is described in the BIOS DSD table.
Signed-off-by: Shrirang Bagul <[email protected]> --- sound/soc/intel/boards/bytcr_rt5640.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c index e8c9a01..ae53a29 100644 --- a/sound/soc/intel/boards/bytcr_rt5640.c +++ b/sound/soc/intel/boards/bytcr_rt5640.c @@ -20,6 +20,7 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/gpio/consumer.h> #include <linux/acpi.h> #include <linux/device.h> #include <linux/dmi.h> @@ -74,6 +75,7 @@ struct byt_acpi_card { struct byt_rt5640_private { struct byt_acpi_card *acpi_card; + struct gpio_desc *gpio_lo_mute; struct clk *mclk; char codec_name[16]; int *clks; @@ -198,6 +200,19 @@ static int platform_clock_control(struct snd_soc_dapm_widget *w, return 0; } +static int byt_rt5660_event_lineout(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *k, int event) +{ + struct snd_soc_dapm_context *dapm = w->dapm; + struct snd_soc_card *card = dapm->card; + struct byt_rt5640_private *priv = snd_soc_card_get_drvdata(card); + + gpiod_set_value_cansleep(priv->gpio_lo_mute, + !(SND_SOC_DAPM_EVENT_ON(event))); + + return 0; +} + static const struct snd_soc_dapm_widget byt_rt5640_widgets[] = { SND_SOC_DAPM_HP("Headphone", NULL), SND_SOC_DAPM_MIC("Headset Mic", NULL), @@ -296,7 +311,7 @@ static const struct snd_kcontrol_new byt_rt5640_controls[] = { static const struct snd_soc_dapm_widget byt_rt5660_widgets[] = { SND_SOC_DAPM_MIC("Line In", NULL), - SND_SOC_DAPM_LINE("Line Out", NULL), + SND_SOC_DAPM_LINE("Line Out", byt_rt5660_event_lineout), SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0, platform_clock_control, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), @@ -562,7 +577,18 @@ static int byt_rt5640_init(struct snd_soc_pcm_runtime *runtime) static int byt_rt5660_init(struct snd_soc_pcm_runtime *runtime) { int ret; + struct snd_soc_codec *codec = runtime->codec; struct snd_soc_card *card = runtime->card; + struct byt_rt5640_private *priv = snd_soc_card_get_drvdata(card); + + /* Request rt5660 GPIO for lineout mute control */ + priv->gpio_lo_mute = devm_gpiod_get_index(codec->dev, + "lineout-mute", 0, 0); + if (IS_ERR(priv->gpio_lo_mute)) { + dev_err(card->dev, "Can't find GPIO_MUTE# gpio\n"); + return PTR_ERR(priv->gpio_lo_mute); + } + gpiod_direction_output(priv->gpio_lo_mute, 1); ret = snd_soc_dapm_add_routes(&card->dapm, byt_rt5640_ssp2_aif1_map, -- 2.9.3
