[alsa-devel] [PATCH] ASoC: da7218: Enable mic level detection reporting to user-space

[Takashi Iwai]

On Thu, 03 Dec 2015 11:45:50 +0100,
Adam Thomson wrote:
> 
> This patch adds support to the codec driver to handle mic level
> detect related IRQs, and report these to user-space using a uevent
> variable.

Is the uevent the best way for this?


thanks,

Takashi

> 
> Signed-off-by: Adam Thomson <Adam.Thomson.Opensource at diasemi.com>
> ---
>  sound/soc/codecs/da7218.c | 19 ++++++++++++++-----
>  1 file changed, 14 insertions(+), 5 deletions(-)
> 
> diff --git a/sound/soc/codecs/da7218.c b/sound/soc/codecs/da7218.c
> index 4fee7ae..752ed04 100644
> --- a/sound/soc/codecs/da7218.c
> +++ b/sound/soc/codecs/da7218.c
> @@ -2202,6 +2202,16 @@ int da7218_hpldet(struct snd_soc_codec *codec, struct snd_soc_jack *jack)
>  }
>  EXPORT_SYMBOL_GPL(da7218_hpldet);
> 
> +static void da7218_micldet_irq(struct snd_soc_codec *codec)
> +{
> +	char *envp[] = {
> +		"EVENT=MIC_LEVEL_DETECT",
> +		NULL,
> +	};
> +
> +	kobject_uevent_env(&codec->dev->kobj, KOBJ_CHANGE, envp);
> +}
> +
>  static void da7218_hpldet_irq(struct snd_soc_codec *codec)
>  {
>  	struct da7218_priv *da7218 = snd_soc_codec_get_drvdata(codec);
> @@ -2232,6 +2242,10 @@ static irqreturn_t da7218_irq_thread(int irq, void *data)
>  	if (!status)
>  		return IRQ_NONE;
> 
> +	/* Mic level detect */
> +	if (status & DA7218_LVL_DET_EVENT_MASK)
> +		da7218_micldet_irq(codec);
> +
>  	/* HP detect */
>  	if (status & DA7218_HPLDET_JACK_EVENT_MASK)
>  		da7218_hpldet_irq(codec);
> @@ -2936,11 +2950,6 @@ static int da7218_probe(struct snd_soc_codec *codec)
>  	}
> 
>  	if (da7218->irq) {
> -		/* Mask off mic level events, currently not handled */
> -		snd_soc_update_bits(codec, DA7218_EVENT_MASK,
> -				    DA7218_LVL_DET_EVENT_MSK_MASK,
> -				    DA7218_LVL_DET_EVENT_MSK_MASK);
> -
>  		ret = devm_request_threaded_irq(codec->dev, da7218->irq, NULL,
>  						da7218_irq_thread,
>  						IRQF_TRIGGER_LOW | IRQF_ONESHOT,
> --
> 1.9.3
> 
>