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authorTakashi Iwai <tiwai@suse.de>2013-07-19 16:59:46 +0200
committerTakashi Iwai <tiwai@suse.de>2013-07-21 11:52:54 +0200
commit60ea8ca21b4584cebb8163879b50ab3d941090bf (patch)
tree0642ef12921c948f9697efc877c6b4beda88c5bc /sound/pci/hda/hda_jack.c
parente4c3bce26de240457370d00ce396602cc98bb3cc (diff)
ALSA: hda - Add snd_hda_jack_detect_state() helper function
snd_hda_jack_detect() function returns a boolean value for a jack plugged in or not, but it also returns always true when the corresponding pin is phantom (i.e. fixed). This is OK in most cases, but it makes the generic parser misbehaving about the auto-mute or auto-mic switching, e.g. when one of headphone pins is a fixed. Namely, the driver decides whether to mute the speaker or not, just depending on the headphone plug state: if one of the headphone jacks is seen as active, then the speaker is muted. Thus this will result always in the muted speaker output. So, the problem is the function returns a boolean, after all, although we need to think of "phantom" jack. Now a new function, snd_hda_jack_detect_state() is introduced to return these tristates. The generic parser uses this function for checking the headphone or mic jack states. Meanwhile, the behavior of snd_hda_jack_detect() is kept as is, for keeping compatibility in other driver codes. Acked-by: David Henningsson <david.henningsson@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_jack.c')
-rw-r--r--sound/pci/hda/hda_jack.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/sound/pci/hda/hda_jack.c b/sound/pci/hda/hda_jack.c
index 3fd2973183e..dc93761a4bc 100644
--- a/sound/pci/hda/hda_jack.c
+++ b/sound/pci/hda/hda_jack.c
@@ -194,18 +194,24 @@ u32 snd_hda_pin_sense(struct hda_codec *codec, hda_nid_t nid)
EXPORT_SYMBOL_HDA(snd_hda_pin_sense);
/**
- * snd_hda_jack_detect - query pin Presence Detect status
+ * snd_hda_jack_detect_state - query pin Presence Detect status
* @codec: the CODEC to sense
* @nid: the pin NID to sense
*
- * Query and return the pin's Presence Detect status.
+ * Query and return the pin's Presence Detect status, as either
+ * HDA_JACK_NOT_PRESENT, HDA_JACK_PRESENT or HDA_JACK_PHANTOM.
*/
-int snd_hda_jack_detect(struct hda_codec *codec, hda_nid_t nid)
+int snd_hda_jack_detect_state(struct hda_codec *codec, hda_nid_t nid)
{
- u32 sense = snd_hda_pin_sense(codec, nid);
- return get_jack_plug_state(sense);
+ struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid);
+ if (jack && jack->phantom_jack)
+ return HDA_JACK_PHANTOM;
+ else if (snd_hda_pin_sense(codec, nid) & AC_PINSENSE_PRESENCE)
+ return HDA_JACK_PRESENT;
+ else
+ return HDA_JACK_NOT_PRESENT;
}
-EXPORT_SYMBOL_HDA(snd_hda_jack_detect);
+EXPORT_SYMBOL_HDA(snd_hda_jack_detect_state);
/**
* snd_hda_jack_detect_enable - enable the jack-detection