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

Started byAdam Thomson <Adam.Thomson.Opensource@diasemi.com>
First post2015-12-03 11:50 +0100
Last post2015-12-03 15:50 +0100
Articles 5 — 3 participants

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  [PATCH] ASoC: da7218: Enable mic level detection reporting to  user-space Adam Thomson <Adam.Thomson.Opensource@diasemi.com> - 2015-12-03 11:50 +0100
    Re: [PATCH] ASoC: da7218: Enable mic level detection reporting to user-space Takashi Iwai <tiwai@suse.de> - 2015-12-03 12:00 +0100
      RE: [PATCH] ASoC: da7218: Enable mic level detection reporting to  user-space "Opensource [Adam Thomson]" <Adam.Thomson.Opensource@diasemi.com> - 2015-12-03 12:20 +0100
        Re: [PATCH] ASoC: da7218: Enable mic level detection reporting to user-space Takashi Iwai <tiwai@suse.de> - 2015-12-03 12:40 +0100
          RE: [PATCH] ASoC: da7218: Enable mic level detection reporting to  user-space "Opensource [Adam Thomson]" <Adam.Thomson.Opensource@diasemi.com> - 2015-12-03 15:50 +0100

#1282925 — [PATCH] ASoC: da7218: Enable mic level detection reporting to user-space

FromAdam Thomson <Adam.Thomson.Opensource@diasemi.com>
Date2015-12-03 11:50 +0100
Subject[PATCH] ASoC: da7218: Enable mic level detection reporting to user-space
Message-ID<qBzCx-3N9-1@gated-at.bofh.it>
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.

Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@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

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#1282939 — Re: [PATCH] ASoC: da7218: Enable mic level detection reporting to user-space

FromTakashi Iwai <tiwai@suse.de>
Date2015-12-03 12:00 +0100
SubjectRe: [PATCH] ASoC: da7218: Enable mic level detection reporting to user-space
Message-ID<qBzMe-3RU-7@gated-at.bofh.it>
In reply to#1282925
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@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
> 
> 
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#1282948

From"Opensource [Adam Thomson]" <Adam.Thomson.Opensource@diasemi.com>
Date2015-12-03 12:20 +0100
Message-ID<qBA5A-4dT-1@gated-at.bofh.it>
In reply to#1282939
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#1282967 — Re: [PATCH] ASoC: da7218: Enable mic level detection reporting to user-space

FromTakashi Iwai <tiwai@suse.de>
Date2015-12-03 12:40 +0100
SubjectRe: [PATCH] ASoC: da7218: Enable mic level detection reporting to user-space
Message-ID<qBAoW-4kA-5@gated-at.bofh.it>
In reply to#1282948
On Thu, 03 Dec 2015 12:15:41 +0100,
Opensource [Adam Thomson] wrote:
> 
> On December 03, 2015 10:56, Takashi Iwai 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
> 
> Well originally I was using an input device mechanism to report to user-space,
> albeit using KEY_VOICECOMMAND, which Mark mentioned wasn't correct for this
> scenario, which was fair enough. He also mentioned that there had been a general
> push back on using input devices so that code was dropped. See thread below:
> 
> https://lkml.org/lkml/2015/11/10/347
> 
> uevent seemed like the simplest solution to report this event, and allow
> user-space to act based on it. As mentioned before though, I am open to
> suggestions if there's a better way.

I'm not strongly opposing to uevent as long as it's well considered.
But then please describe how it's notified properly and why it was
chosen.  The patch changelog has enough free room to write more
details, fortunately.  Tell more your story for Christmas :)

In general, you can use an ALSA control notification for this kind of
event.  But it also depends on the user-space side.  With alsa-lib,
it's pretty easy to use, while with tinyalsa that lacks of the notifier
handling, you'd need to implement more code there.

For a plug/unplug type event, we have a generic jack layer, but this
doesn't seem fitting perfectly, either.


Takashi

> 
> > >
> > > Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@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
> > >
> > >
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#1283097

From"Opensource [Adam Thomson]" <Adam.Thomson.Opensource@diasemi.com>
Date2015-12-03 15:50 +0100
Message-ID<qBDmO-6pd-23@gated-at.bofh.it>
In reply to#1282967
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