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Diffstat (limited to 'kernel/sound/core/ctljack.c')
-rw-r--r--kernel/sound/core/ctljack.c44
1 files changed, 38 insertions, 6 deletions
diff --git a/kernel/sound/core/ctljack.c b/kernel/sound/core/ctljack.c
index e4b38fbe5..84a3cd683 100644
--- a/kernel/sound/core/ctljack.c
+++ b/kernel/sound/core/ctljack.c
@@ -31,19 +31,52 @@ static struct snd_kcontrol_new jack_detect_kctl = {
.get = jack_detect_kctl_get,
};
+static int get_available_index(struct snd_card *card, const char *name)
+{
+ struct snd_ctl_elem_id sid;
+
+ memset(&sid, 0, sizeof(sid));
+
+ sid.index = 0;
+ sid.iface = SNDRV_CTL_ELEM_IFACE_CARD;
+ strlcpy(sid.name, name, sizeof(sid.name));
+
+ while (snd_ctl_find_id(card, &sid)) {
+ sid.index++;
+ /* reset numid; otherwise snd_ctl_find_id() hits this again */
+ sid.numid = 0;
+ }
+
+ return sid.index;
+}
+
+static void jack_kctl_name_gen(char *name, const char *src_name, int size)
+{
+ size_t count = strlen(src_name);
+ bool need_cat = true;
+
+ /* remove redundant " Jack" from src_name */
+ if (count >= 5)
+ need_cat = strncmp(&src_name[count - 5], " Jack", 5) ? true : false;
+
+ snprintf(name, size, need_cat ? "%s Jack" : "%s", src_name);
+
+}
+
struct snd_kcontrol *
-snd_kctl_jack_new(const char *name, int idx, void *private_data)
+snd_kctl_jack_new(const char *name, struct snd_card *card)
{
struct snd_kcontrol *kctl;
- kctl = snd_ctl_new1(&jack_detect_kctl, private_data);
+
+ kctl = snd_ctl_new1(&jack_detect_kctl, NULL);
if (!kctl)
return NULL;
- snprintf(kctl->id.name, sizeof(kctl->id.name), "%s Jack", name);
- kctl->id.index = idx;
+
+ jack_kctl_name_gen(kctl->id.name, name, sizeof(kctl->id.name));
+ kctl->id.index = get_available_index(card, kctl->id.name);
kctl->private_value = 0;
return kctl;
}
-EXPORT_SYMBOL_GPL(snd_kctl_jack_new);
void snd_kctl_jack_report(struct snd_card *card,
struct snd_kcontrol *kctl, bool status)
@@ -53,4 +86,3 @@ void snd_kctl_jack_report(struct snd_card *card,
kctl->private_value = status;
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
}
-EXPORT_SYMBOL_GPL(snd_kctl_jack_report);