mirror of
https://github.com/torvalds/linux
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d0a601c278
snd_kctl_jack_new() tries to assign a unique index number when a name
string that has been already registered is passed. However, it checks
with the base string without "Jack" suffix, so it never hits.
Fix the call with the properly processed name string instead.
Fixes: b8dd086674 'ALSA: Jack: handle jack embedded kcontrol creating within ctljack')
Signed-off-by: Takashi Iwai <tiwai@suse.de>
86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
/*
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* Helper functions for jack-detection kcontrols
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*
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* Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#define jack_detect_kctl_info snd_ctl_boolean_mono_info
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static int jack_detect_kctl_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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ucontrol->value.integer.value[0] = kcontrol->private_value;
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return 0;
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}
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static struct snd_kcontrol_new jack_detect_kctl = {
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/* name is filled later */
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.iface = SNDRV_CTL_ELEM_IFACE_CARD,
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.access = SNDRV_CTL_ELEM_ACCESS_READ,
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.info = jack_detect_kctl_info,
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.get = jack_detect_kctl_get,
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};
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static int get_available_index(struct snd_card *card, const char *name)
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{
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struct snd_ctl_elem_id sid;
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memset(&sid, 0, sizeof(sid));
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sid.index = 0;
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sid.iface = SNDRV_CTL_ELEM_IFACE_CARD;
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strlcpy(sid.name, name, sizeof(sid.name));
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while (snd_ctl_find_id(card, &sid))
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sid.index++;
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return sid.index;
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}
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static void jack_kctl_name_gen(char *name, const char *src_name, int size)
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{
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size_t count = strlen(src_name);
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bool need_cat = true;
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/* remove redundant " Jack" from src_name */
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if (count >= 5)
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need_cat = strncmp(&src_name[count - 5], " Jack", 5) ? true : false;
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snprintf(name, size, need_cat ? "%s Jack" : "%s", src_name);
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}
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struct snd_kcontrol *
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snd_kctl_jack_new(const char *name, struct snd_card *card)
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{
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struct snd_kcontrol *kctl;
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kctl = snd_ctl_new1(&jack_detect_kctl, NULL);
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if (!kctl)
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return NULL;
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jack_kctl_name_gen(kctl->id.name, name, sizeof(kctl->id.name));
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kctl->id.index = get_available_index(card, kctl->id.name);
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kctl->private_value = 0;
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return kctl;
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}
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void snd_kctl_jack_report(struct snd_card *card,
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struct snd_kcontrol *kctl, bool status)
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{
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if (kctl->private_value == status)
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return;
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kctl->private_value = status;
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snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
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}
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