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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
35be544a TI |
2 | /* |
3 | * Helper functions for jack-detection kcontrols | |
4 | * | |
5 | * Copyright (c) 2011 Takashi Iwai <tiwai@suse.de> | |
35be544a TI |
6 | */ |
7 | ||
8 | #include <linux/kernel.h> | |
bf815bf0 | 9 | #include <linux/export.h> |
35be544a TI |
10 | #include <sound/core.h> |
11 | #include <sound/control.h> | |
12 | ||
13 | #define jack_detect_kctl_info snd_ctl_boolean_mono_info | |
14 | ||
15 | static int jack_detect_kctl_get(struct snd_kcontrol *kcontrol, | |
16 | struct snd_ctl_elem_value *ucontrol) | |
17 | { | |
18 | ucontrol->value.integer.value[0] = kcontrol->private_value; | |
19 | return 0; | |
20 | } | |
21 | ||
905e46ac | 22 | static const struct snd_kcontrol_new jack_detect_kctl = { |
35be544a TI |
23 | /* name is filled later */ |
24 | .iface = SNDRV_CTL_ELEM_IFACE_CARD, | |
25 | .access = SNDRV_CTL_ELEM_ACCESS_READ, | |
26 | .info = jack_detect_kctl_info, | |
27 | .get = jack_detect_kctl_get, | |
28 | }; | |
29 | ||
b8dd0866 JY |
30 | static int get_available_index(struct snd_card *card, const char *name) |
31 | { | |
32 | struct snd_ctl_elem_id sid; | |
33 | ||
34 | memset(&sid, 0, sizeof(sid)); | |
35 | ||
36 | sid.index = 0; | |
37 | sid.iface = SNDRV_CTL_ELEM_IFACE_CARD; | |
38 | strlcpy(sid.name, name, sizeof(sid.name)); | |
39 | ||
7378bc2f | 40 | while (snd_ctl_find_id(card, &sid)) { |
b8dd0866 | 41 | sid.index++; |
7378bc2f TI |
42 | /* reset numid; otherwise snd_ctl_find_id() hits this again */ |
43 | sid.numid = 0; | |
44 | } | |
b8dd0866 JY |
45 | |
46 | return sid.index; | |
47 | } | |
48 | ||
49 | static void jack_kctl_name_gen(char *name, const char *src_name, int size) | |
50 | { | |
51 | size_t count = strlen(src_name); | |
52 | bool need_cat = true; | |
53 | ||
54 | /* remove redundant " Jack" from src_name */ | |
55 | if (count >= 5) | |
56 | need_cat = strncmp(&src_name[count - 5], " Jack", 5) ? true : false; | |
57 | ||
58 | snprintf(name, size, need_cat ? "%s Jack" : "%s", src_name); | |
59 | ||
60 | } | |
61 | ||
35be544a | 62 | struct snd_kcontrol * |
2ba2dfa1 | 63 | snd_kctl_jack_new(const char *name, struct snd_card *card) |
35be544a TI |
64 | { |
65 | struct snd_kcontrol *kctl; | |
b8dd0866 | 66 | |
2ba2dfa1 | 67 | kctl = snd_ctl_new1(&jack_detect_kctl, NULL); |
35be544a TI |
68 | if (!kctl) |
69 | return NULL; | |
b8dd0866 JY |
70 | |
71 | jack_kctl_name_gen(kctl->id.name, name, sizeof(kctl->id.name)); | |
d0a601c2 | 72 | kctl->id.index = get_available_index(card, kctl->id.name); |
35be544a TI |
73 | kctl->private_value = 0; |
74 | return kctl; | |
75 | } | |
35be544a TI |
76 | |
77 | void snd_kctl_jack_report(struct snd_card *card, | |
78 | struct snd_kcontrol *kctl, bool status) | |
79 | { | |
80 | if (kctl->private_value == status) | |
81 | return; | |
82 | kctl->private_value = status; | |
83 | snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); | |
84 | } |