[ALSA] ac97 - Add virtual master control to VT1616/VT1617A codec.
Enable VMASTER for VT1616 / VT1617A codec.
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/drivers/Kconfig b/sound/drivers/Kconfig
index 602b58e..159137b 100644
--- a/sound/drivers/Kconfig
+++ b/sound/drivers/Kconfig
@@ -58,6 +58,7 @@
tristate
select SND_PCM
select AC97_BUS
+ select SND_VMASTER
config SND_DUMMY
tristate "Dummy (/dev/null) soundcard"
diff --git a/sound/pci/ac97/ac97_patch.c b/sound/pci/ac97/ac97_patch.c
index 1292dce..92817f7 100644
--- a/sound/pci/ac97/ac97_patch.c
+++ b/sound/pci/ac97/ac97_patch.c
@@ -3352,8 +3352,66 @@
AC97_SINGLE("Downmix Surround to Front", 0x5a, 11, 1, 0),
};
+static const char *slave_vols_vt1616[] = {
+ "Front Playback Volume",
+ "Surround Playback Volume",
+ "Center Playback Volume",
+ "LFE Playback Volume",
+ NULL
+};
+
+static const char *slave_sws_vt1616[] = {
+ "Front Playback Switch",
+ "Surround Playback Switch",
+ "Center Playback Switch",
+ "LFE Playback Switch",
+ NULL
+};
+
+/* find a mixer control element with the given name */
+static struct snd_kcontrol *snd_ac97_find_mixer_ctl(struct snd_ac97 *ac97,
+ const char *name)
+{
+ struct snd_ctl_elem_id id;
+ memset(&id, 0, sizeof(id));
+ id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+ strcpy(id.name, name);
+ return snd_ctl_find_id(ac97->bus->card, &id);
+}
+
+/* create a virtual master control and add slaves */
+int snd_ac97_add_vmaster(struct snd_ac97 *ac97, char *name,
+ const unsigned int *tlv, const char **slaves)
+{
+ struct snd_kcontrol *kctl;
+ const char **s;
+ int err;
+
+ kctl = snd_ctl_make_virtual_master(name, tlv);
+ if (!kctl)
+ return -ENOMEM;
+ err = snd_ctl_add(ac97->bus->card, kctl);
+ if (err < 0)
+ return err;
+
+ for (s = slaves; *s; s++) {
+ struct snd_kcontrol *sctl;
+
+ sctl = snd_ac97_find_mixer_ctl(ac97, *s);
+ if (!sctl) {
+ snd_printdd("Cannot find slave %s, skipped\n", *s);
+ continue;
+ }
+ err = snd_ctl_add_slave(kctl, sctl);
+ if (err < 0)
+ return err;
+ }
+ return 0;
+}
+
static int patch_vt1616_specific(struct snd_ac97 * ac97)
{
+ struct snd_kcontrol *kctl;
int err;
if (snd_ac97_try_bit(ac97, 0x5a, 9))
@@ -3361,6 +3419,24 @@
return err;
if ((err = patch_build_controls(ac97, &snd_ac97_controls_vt1616[1], ARRAY_SIZE(snd_ac97_controls_vt1616) - 1)) < 0)
return err;
+
+ /* There is already a misnamed master switch. Rename it. */
+ kctl = snd_ac97_find_mixer_ctl(ac97, "Master Playback Volume");
+ if (!kctl)
+ return -EINVAL;
+
+ snd_ac97_rename_vol_ctl(ac97, "Master Playback", "Front Playback");
+
+ err = snd_ac97_add_vmaster(ac97, "Master Playback Volume",
+ kctl->tlv.p, slave_vols_vt1616);
+ if (err < 0)
+ return err;
+
+ err = snd_ac97_add_vmaster(ac97, "Master Playback Switch",
+ NULL, slave_sws_vt1616);
+ if (err < 0)
+ return err;
+
return 0;
}