On Thu, 29 Nov 2018 08:22:39 +0100,
Kailang wrote:
>
> Hi Takashi,
>
> I test the patch.
> It will go to Max or Min volume when I press HS button up or down.
>
> + state = jack->button_state;
> + if (get_jack_plug_state(jack->pin_sense))
> + state |= jack->type;
> + snd_jack_report(jack->jack, state);
> If (jack->nid == 0x55)
> snd_jack_report(jack->jack, 0); ==> Add this will solve keep volume up and down.
>
> If the pin sense active, it will update Mic and Headphone state. (Upper code)
> But it still had chance to update 0x55 during unplug and plug state.
> So, Maybe need to clear the Button state. I guess.
As we don't receive button-release events, it makes sense to send the
button clear at each time, yes.
For the one-shot button event, you can handle like below.
--- a/sound/pci/hda/hda_jack.c
+++ b/sound/pci/hda/hda_jack.c
@@ -343,6 +343,11 @@ void snd_hda_jack_report_sync(struct hda_codec *codec)
if (get_jack_plug_state(jack->pin_sense))
state |= jack->type;
snd_jack_report(jack->jack, state);
+ if (jack->button_state) {
+ snd_jack_report(jack->jack,
+ state & ~jack->button_state);
+ jack->button_state = 0; /* button released */
+ }
}
}
EXPORT_SYMBOL_GPL(snd_hda_jack_report_sync);
thanks,
Takashi
>
> BR,
> Kailang
>
> -----Original Message-----
> From: Takashi Iwai <tiwai@xxxxxxx>
> Sent: Wednesday, November 28, 2018 10:05 PM
> To: Kailang <kailang@xxxxxxxxxxx>
> Cc: (alsa-devel@xxxxxxxxxxxxxxxx) <alsa-devel@xxxxxxxxxxxxxxxx>
> Subject: Re: HDA headset button support
>
> On Wed, 28 Nov 2018 13:03:58 +0100,
> Kailang wrote:
> >
> > Hi Takashi,
> >
> > >I'd rather like to extend snd_hda_jack_add_kctl() with the key
> > >support (maybe adding a new function). You can pass there the
> > >combination of SND_JACK_BTN_X with KEY_XXX in an array.
> >
> > Do you mean create new function like below?
> > snd_hda_jack_add_key_kctl()
> >
> > It couldn't use snd_hda_jack_add_kctl() directly.
> > Because it had report pin state and get type from NID.
> >
> > type = get_input_jack_type(codec, nid);
> > .....
> > .....
> > state = snd_hda_jack_detect(codec, nid);
> > snd_jack_report(jack->jack, state ? jack->type : 0);
> >
> > So, to create a new function in hda_jack.c was better.
>
> Well, this seems more deeper than I thought.
>
> Below is my quick attempt to add the infrastructure. This adds more flexibility but still easiness for other possible button implementations, hopefully.
>
> Could you check the series below?
>
>
> thanks,
>
> Takashi
>
>
> ------Please consider the environment before printing this e-mail.
>
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