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| author | Takashi Iwai <tiwai@suse.de> | 2012-11-30 18:34:38 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2012-11-30 18:34:38 +0100 |
| commit | dda415d41882449f841f88d829dd65b6ee1c374c (patch) | |
| tree | dde9f520ddf3466235bf60d610f54383a4d76f9c /sound/pci/hda/hda_codec.c | |
| parent | 475c3d21e8e1fe7cbec76b0f3e8d9f4dea66acd8 (diff) | |
| download | linux-dda415d41882449f841f88d829dd65b6ee1c374c.tar.bz2 | |
ALSA: hda - Add a helper function for simple enum kcontrols
The same type of code is being used in multiple places in various
codec drivers, so put it as a core library.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_codec.c')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 3634bfebc008..d05bcbb61077 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -4792,6 +4792,34 @@ EXPORT_SYMBOL_HDA(snd_hda_input_mux_put); /* + * process kcontrol info callback of a simple string enum array + * when @num_items is 0 or @texts is NULL, assume a boolean enum array + */ +int snd_hda_enum_helper_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo, + int num_items, const char * const *texts) +{ + static const char * const texts_default[] = { + "Disabled", "Enabled" + }; + + if (!texts || !num_items) { + num_items = 2; + texts = texts_default; + } + + uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; + uinfo->count = 1; + uinfo->value.enumerated.items = num_items; + if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items) + uinfo->value.enumerated.item = uinfo->value.enumerated.items - 1; + strcpy(uinfo->value.enumerated.name, + texts[uinfo->value.enumerated.item]); + return 0; +} +EXPORT_SYMBOL_HDA(snd_hda_enum_helper_info); + +/* * Multi-channel / digital-out PCM helper functions */ |