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ALSA: Add support for mechanical jack insertion

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Some systems support both mechanical and electrical jack detection,
allowing them to report that a jack is physically present but does
not have any functioning connections. Add a new jack type for these,
allowing user space to report faulty connections.

Thanks to Guillem Jover for the suggestion.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Mark Brown 2008-12-10 13:55:49 +00:00 committed by Takashi Iwai
parent a53ccab3cc
commit cdc6936432
3 changed files with 8 additions and 0 deletions
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1
include/linux/input.h
View File

@ -645,6 +645,7 @@ struct input_absinfo {
#define SW_MICROPHONE_INSERT 0x04 /* set = inserted */
#define SW_DOCK 0x05 /* set = plugged into dock */
#define SW_LINEOUT_INSERT 0x06 /* set = inserted */
#define SW_JACK_PHYSICAL_INSERT 0x07 /* set = mechanical switch set */
#define SW_MAX 0x0f
#define SW_CNT (SW_MAX+1)

1
include/sound/jack.h
View File

@ -36,6 +36,7 @@ enum snd_jack_types {
SND_JACK_MICROPHONE = 0x0002,
SND_JACK_HEADSET = SND_JACK_HEADPHONE | SND_JACK_MICROPHONE,
SND_JACK_LINEOUT = 0x0004,
SND_JACK_MECHANICAL = 0x0008, /* If detected separately */
};
struct snd_jack {

6
sound/core/jack.c
View File

@ -108,6 +108,9 @@ int snd_jack_new(struct snd_card *card, const char *id, int type,
if (type & SND_JACK_MICROPHONE)
input_set_capability(jack->input_dev, EV_SW,
SW_MICROPHONE_INSERT);
if (type & SND_JACK_MECHANICAL)
input_set_capability(jack->input_dev, EV_SW,
SW_JACK_PHYSICAL_INSERT);
err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
if (err < 0)
@ -159,6 +162,9 @@ void snd_jack_report(struct snd_jack *jack, int status)
if (jack->type & SND_JACK_MICROPHONE)
input_report_switch(jack->input_dev, SW_MICROPHONE_INSERT,
status & SND_JACK_MICROPHONE);
if (jack->type & SND_JACK_MECHANICAL)
input_report_switch(jack->input_dev, SW_JACK_PHYSICAL_INSERT,
status & SND_JACK_MECHANICAL);
input_sync(jack->input_dev);
}