diff options
Diffstat (limited to 'sound/pci/hda/hda_codec.c')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index e7fb182f90e..14a6f546327 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -1662,6 +1662,54 @@ int snd_hda_add_new_ctls(struct hda_codec *codec, snd_kcontrol_new_t *knew) } + /* + * Channel mode helper + */ +int snd_hda_ch_mode_info(struct hda_codec *codec, snd_ctl_elem_info_t *uinfo, + const struct hda_channel_mode *chmode, int num_chmodes) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; + uinfo->count = 1; + uinfo->value.enumerated.items = num_chmodes; + if (uinfo->value.enumerated.item >= num_chmodes) + uinfo->value.enumerated.item = num_chmodes - 1; + sprintf(uinfo->value.enumerated.name, "%dch", + chmode[uinfo->value.enumerated.item].channels); + return 0; +} + +int snd_hda_ch_mode_get(struct hda_codec *codec, snd_ctl_elem_value_t *ucontrol, + const struct hda_channel_mode *chmode, int num_chmodes, + int max_channels) +{ + int i; + + for (i = 0; i < num_chmodes; i++) { + if (max_channels == chmode[i].channels) { + ucontrol->value.enumerated.item[0] = i; + break; + } + } + return 0; +} + +int snd_hda_ch_mode_put(struct hda_codec *codec, snd_ctl_elem_value_t *ucontrol, + const struct hda_channel_mode *chmode, int num_chmodes, + int *max_channelsp) +{ + unsigned int mode; + + mode = ucontrol->value.enumerated.item[0]; + snd_assert(mode < num_chmodes, return -EINVAL); + if (*max_channelsp && ! codec->in_resume) + return 0; + /* change the current channel setting */ + *max_channelsp = chmode[mode].channels; + if (chmode[mode].sequence) + snd_hda_sequence_write(codec, chmode[mode].sequence); + return 1; +} + /* * input MUX helper */ |