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authorDylan Reid <dgreid@chromium.org>2012-11-19 19:48:07 +0100
committerTakashi Iwai <tiwai@suse.de>2012-11-19 19:49:58 +0100
commit0619ba8c17b121ef0273be181198659b17d84247 (patch)
tree81cb3273e7376734b517d4695efa3d02455458ad /sound/pci/hda/hda_jack.c
parent379170a42c84cee5f95fac536a4b5b76843baf90 (diff)
downloadlinux-0619ba8c17b121ef0273be181198659b17d84247.tar.bz2
ALSA: hda - Allow jack state to depend on another jack
Introduce the concept of a "gated" jack. The gated jack's pin sense is only valid when the "gating" jack is plugged. This requires checking the gating jack when the gated jack changes and re-checking the gated jack when the gating jack is plugged/unplugged. This allows handling of devices where the mic jack detect floats when the headphone jack is unplugged. [Rewritten for fixing the possible snd_array reallocation, covering the missing callback calls and jack sync operations, as well as some code cleanups -- tiwai] Signed-off-by: Dylan Reid <dgreid@chromium.org> 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.c72
1 files changed, 63 insertions, 9 deletions
diff --git a/sound/pci/hda/hda_jack.c b/sound/pci/hda/hda_jack.c
index 5bdbadaa20fe..4e1948001338 100644
--- a/sound/pci/hda/hda_jack.c
+++ b/sound/pci/hda/hda_jack.c
@@ -122,6 +122,8 @@ void snd_hda_jack_tbl_clear(struct hda_codec *codec)
snd_array_free(&codec->jacktbl);
}
+#define get_jack_plug_state(sense) !!(sense & AC_PINSENSE_PRESENCE)
+
/* update the cached value and notification flag if needed */
static void jack_detect_update(struct hda_codec *codec,
struct hda_jack_tbl *jack)
@@ -134,7 +136,21 @@ static void jack_detect_update(struct hda_codec *codec,
else
jack->pin_sense = read_pin_sense(codec, jack->nid);
+ /* A gating jack indicates the jack is invalid if gating is unplugged */
+ if (jack->gating_jack && !snd_hda_jack_detect(codec, jack->gating_jack))
+ jack->pin_sense &= ~AC_PINSENSE_PRESENCE;
+
jack->jack_dirty = 0;
+
+ /* If a jack is gated by this one update it. */
+ if (jack->gated_jack) {
+ struct hda_jack_tbl *gated =
+ snd_hda_jack_tbl_get(codec, jack->gated_jack);
+ if (gated) {
+ gated->jack_dirty = 1;
+ jack_detect_update(codec, gated);
+ }
+ }
}
/**
@@ -173,8 +189,6 @@ u32 snd_hda_pin_sense(struct hda_codec *codec, hda_nid_t nid)
}
EXPORT_SYMBOL_HDA(snd_hda_pin_sense);
-#define get_jack_plug_state(sense) !!(sense & AC_PINSENSE_PRESENCE)
-
/**
* snd_hda_jack_detect - query pin Presence Detect status
* @codec: the CODEC to sense
@@ -222,16 +236,46 @@ int snd_hda_jack_detect_enable(struct hda_codec *codec, hda_nid_t nid,
EXPORT_SYMBOL_HDA(snd_hda_jack_detect_enable);
/**
+ * snd_hda_jack_set_gating_jack - Set gating jack.
+ *
+ * Indicates the gated jack is only valid when the gating jack is plugged.
+ */
+int snd_hda_jack_set_gating_jack(struct hda_codec *codec, hda_nid_t gated_nid,
+ hda_nid_t gating_nid)
+{
+ struct hda_jack_tbl *gated = snd_hda_jack_tbl_get(codec, gated_nid);
+ struct hda_jack_tbl *gating = snd_hda_jack_tbl_get(codec, gating_nid);
+
+ if (!gated || !gating)
+ return -EINVAL;
+
+ gated->gating_jack = gating_nid;
+ gating->gated_jack = gated_nid;
+
+ return 0;
+}
+EXPORT_SYMBOL_HDA(snd_hda_jack_set_gating_jack);
+
+/**
* snd_hda_jack_report_sync - sync the states of all jacks and report if changed
*/
void snd_hda_jack_report_sync(struct hda_codec *codec)
{
- struct hda_jack_tbl *jack = codec->jacktbl.list;
+ struct hda_jack_tbl *jack;
int i, state;
+ /* update all jacks at first */
+ jack = codec->jacktbl.list;
for (i = 0; i < codec->jacktbl.used; i++, jack++)
- if (jack->nid) {
+ if (jack->nid)
jack_detect_update(codec, jack);
+
+ /* report the updated jacks; it's done after updating all jacks
+ * to make sure that all gating jacks properly have been set
+ */
+ jack = codec->jacktbl.list;
+ for (i = 0; i < codec->jacktbl.used; i++, jack++)
+ if (jack->nid) {
if (!jack->kctl)
continue;
state = get_jack_plug_state(jack->pin_sense);
@@ -424,6 +468,19 @@ int snd_hda_jack_add_kctls(struct hda_codec *codec,
}
EXPORT_SYMBOL_HDA(snd_hda_jack_add_kctls);
+static void call_jack_callback(struct hda_codec *codec,
+ struct hda_jack_tbl *jack)
+{
+ if (jack->callback)
+ jack->callback(codec, jack);
+ if (jack->gated_jack) {
+ struct hda_jack_tbl *gated =
+ snd_hda_jack_tbl_get(codec, jack->gated_jack);
+ if (gated && gated->callback)
+ gated->callback(codec, gated);
+ }
+}
+
void snd_hda_jack_unsol_event(struct hda_codec *codec, unsigned int res)
{
struct hda_jack_tbl *event;
@@ -434,9 +491,7 @@ void snd_hda_jack_unsol_event(struct hda_codec *codec, unsigned int res)
return;
event->jack_dirty = 1;
- if (event->callback)
- event->callback(codec, event);
-
+ call_jack_callback(codec, event);
snd_hda_jack_report_sync(codec);
}
EXPORT_SYMBOL_HDA(snd_hda_jack_unsol_event);
@@ -455,8 +510,7 @@ void snd_hda_jack_poll_all(struct hda_codec *codec)
if (old_sense == get_jack_plug_state(jack->pin_sense))
continue;
changes = 1;
- if (jack->callback)
- jack->callback(codec, jack);
+ call_jack_callback(codec, jack);
}
if (changes)
snd_hda_jack_report_sync(codec);