[alsa-devel] [PATCH] ASoC: simple-card: Add mic and hp detect gpios.

[Jianqun]

在 10/02/2014 05:25 AM, Dylan Reid 写道:
> Allow Headphone and Microphone jack detect gpios to be specified in
> device tree.  This will allow a few systems including rk3288_max98090
> to use simple-card instead of having their own board file.
>
> Signed-off-by: Dylan Reid <dgreid at chromium.org>
> ---
>  .../devicetree/bindings/sound/simple-card.txt      |  4 ++
>  sound/soc/generic/simple-card.c                    | 73 ++++++++++++++++++++++
>  2 files changed, 77 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt b/Documentation/devicetree/bindings/sound/simple-card.txt
> index c2e9841..72d94b7 100644
> --- a/Documentation/devicetree/bindings/sound/simple-card.txt
> +++ b/Documentation/devicetree/bindings/sound/simple-card.txt
> @@ -17,6 +17,10 @@ Optional properties:
>  					  source.
>  - simple-audio-card,mclk-fs             : Multiplication factor between stream rate and codec
>    					  mclk.
> +- simple-audio-card,hp_det_gpio		: Reference to GPIO that signals when
> +					  headphones are attached.
> +- simple-audio-card,mic_det_gpio	: Reference to GPIO that signals when
> +					  a microphone is attached.
>  
>  Optional subnodes:
>  
> diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
> index 709ce67..fcb431f 100644
> --- a/sound/soc/generic/simple-card.c
> +++ b/sound/soc/generic/simple-card.c
> @@ -10,10 +10,13 @@
>   */
>  #include <linux/clk.h>
>  #include <linux/device.h>
> +#include <linux/gpio.h>
>  #include <linux/module.h>
>  #include <linux/of.h>
> +#include <linux/of_gpio.h>
>  #include <linux/platform_device.h>
>  #include <linux/string.h>
> +#include <sound/jack.h>
>  #include <sound/simple_card.h>
>  #include <sound/soc-dai.h>
>  #include <sound/soc.h>
> @@ -25,6 +28,8 @@ struct simple_card_data {
>  		struct asoc_simple_dai codec_dai;
>  	} *dai_props;
>  	unsigned int mclk_fs;
> +	int gpio_hp_det;
> +	int gpio_mic_det;
>  	struct snd_soc_dai_link dai_link[];	/* dynamically allocated */
>  };
>  
> @@ -54,6 +59,32 @@ static struct snd_soc_ops asoc_simple_card_ops = {
>  	.hw_params = asoc_simple_card_hw_params,
>  };
>  
> +static struct snd_soc_jack simple_card_hp_jack;
> +static struct snd_soc_jack_pin simple_card_hp_jack_pins[] = {
> +	{
> +		.pin = "Headphones",
> +		.mask = SND_JACK_HEADPHONE,
> +	},
> +};
> +static struct snd_soc_jack_gpio simple_card_hp_jack_gpio = {
> +	.name = "Headphone detection",
> +	.report = SND_JACK_HEADPHONE,
> +	.debounce_time = 150,
I think some board needs "invert" trigger level, i.e need to add "invert" property in dt ?
Pinky board do need it.
> +};
> +
> +static struct snd_soc_jack simple_card_mic_jack;
> +static struct snd_soc_jack_pin simple_card_mic_jack_pins[] = {
> +	{
> +		.pin = "Mic Jack",
> +		.mask = SND_JACK_MICROPHONE,
> +	},
> +};
> +static struct snd_soc_jack_gpio simple_card_mic_jack_gpio = {
> +	.name = "Mic detection",
> +	.report = SND_JACK_MICROPHONE,
> +	.debounce_time = 150,
> +};
> +
>  static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
>  				       struct asoc_simple_dai *set)
>  {
> @@ -109,6 +140,28 @@ static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
>  	if (ret < 0)
>  		return ret;
>  
> +	if (gpio_is_valid(priv->gpio_hp_det)) {
> +		snd_soc_jack_new(codec->codec, "Headphones", SND_JACK_HEADPHONE,
> +				 &simple_card_hp_jack);
> +		snd_soc_jack_add_pins(&simple_card_hp_jack,
> +				      ARRAY_SIZE(simple_card_hp_jack_pins),
> +				      simple_card_hp_jack_pins);
> +
> +		simple_card_hp_jack_gpio.gpio = priv->gpio_hp_det;
> +		snd_soc_jack_add_gpios(&simple_card_hp_jack, 1,
> +				       &simple_card_hp_jack_gpio);
> +	}
> +
> +	if (gpio_is_valid(priv->gpio_mic_det)) {
> +		snd_soc_jack_new(codec->codec, "Mic Jack", SND_JACK_MICROPHONE,
> +				 &simple_card_mic_jack);
> +		snd_soc_jack_add_pins(&simple_card_mic_jack,
> +				      ARRAY_SIZE(simple_card_mic_jack_pins),
> +				      simple_card_mic_jack_pins);
> +		simple_card_mic_jack_gpio.gpio = priv->gpio_mic_det;
> +		snd_soc_jack_add_gpios(&simple_card_mic_jack, 1,
> +				       &simple_card_mic_jack_gpio);
> +	}
>  	return 0;
>  }
>  
> @@ -383,6 +436,16 @@ static int asoc_simple_card_parse_of(struct device_node *node,
>  			return ret;
>  	}
>  
> +	priv->gpio_hp_det = of_get_named_gpio(node,
> +				"simple-audio-card,hp-det-gpio", 0);
> +	if (priv->gpio_hp_det == -EPROBE_DEFER)
> +		return -EPROBE_DEFER;
> +
> +	priv->gpio_mic_det = of_get_named_gpio(node,
> +				"simple-audio-card,mic-det-gpio", 0);
> +	if (priv->gpio_mic_det == -EPROBE_DEFER)
> +		return -EPROBE_DEFER;
> +
>  	if (!priv->snd_card.name)
>  		priv->snd_card.name = priv->snd_card.dai_link->name;
>  
> @@ -502,6 +565,16 @@ err:
>  
>  static int asoc_simple_card_remove(struct platform_device *pdev)
>  {
> +	struct snd_soc_card *card = platform_get_drvdata(pdev);
> +	struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
> +
> +	if (gpio_is_valid(priv->gpio_hp_det))
> +		snd_soc_jack_free_gpios(&simple_card_hp_jack, 1,
> +					&simple_card_hp_jack_gpio);
> +	if (gpio_is_valid(priv->gpio_mic_det))
> +		snd_soc_jack_free_gpios(&simple_card_mic_jack, 1,
> +					&simple_card_mic_jack_gpio);
> +
>  	return asoc_simple_card_unref(pdev);
>  }
>  

-- 
Jianqun Xu

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