xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[ALSA] hda-codec - Add channel-mode helper

Browse Source 
Modules: HDA Codec driver,HDA generic driver

Add common channel-mode helper functions for all codec patches.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
2005-11-17 11:06:29 +01:00
committed by Jaroslav Kysela
parent 59de641ca3
commit d2a6d7dc75
5 changed files with 99 additions and 97 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
sound/pci/hda/hda_codec.c
View File

@@ -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
*/