ALSA: ac97: Implement channel map workaround for ALC650
ALC650 has a channel swap option between surround and CLFE channels,
so we need to tweak the channel maps dynamically depending on the
register bit.
Now struct snd_ac97 can contain chmap pointers for playback and
capture. The driver may store these and let ac97 driver changing the
channel mapping dynamically.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/ac97/ac97_patch.c b/sound/pci/ac97/ac97_patch.c
index a872d0a..66a3bc9 100644
--- a/sound/pci/ac97/ac97_patch.c
+++ b/sound/pci/ac97/ac97_patch.c
@@ -2595,6 +2595,21 @@
shared ? 0 : 0x100);
}
+static int alc650_swap_surround_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
+ struct snd_pcm_chmap *map = ac97->chmaps[SNDRV_PCM_STREAM_PLAYBACK];
+
+ if (map) {
+ if (ucontrol->value.integer.value[0])
+ map->chmap = snd_pcm_std_chmaps;
+ else
+ map->chmap = snd_pcm_alt_chmaps;
+ }
+ return snd_ac97_put_volsw(kcontrol, ucontrol);
+}
+
static const struct snd_kcontrol_new snd_ac97_controls_alc650[] = {
AC97_SINGLE("Duplicate Front", AC97_ALC650_MULTICH, 0, 1, 0),
AC97_SINGLE("Surround Down Mix", AC97_ALC650_MULTICH, 1, 1, 0),
@@ -2608,7 +2623,14 @@
/* 9: Line-In/Surround share */
/* 10: Mic/CLFE share */
/* 11-13: in IEC958 controls */
- AC97_SINGLE("Swap Surround Slot", AC97_ALC650_MULTICH, 14, 1, 0),
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Swap Surround Slot",
+ .info = snd_ac97_info_volsw,
+ .get = snd_ac97_get_volsw,
+ .put = alc650_swap_surround_put,
+ .private_value = AC97_SINGLE_VALUE(AC97_ALC650_MULTICH, 14, 1, 0),
+ },
#if 0 /* always set in patch_alc650 */
AC97_SINGLE("IEC958 Input Clock Enable", AC97_ALC650_CLOCK, 0, 1, 0),
AC97_SINGLE("IEC958 Input Pin Enable", AC97_ALC650_CLOCK, 1, 1, 0),