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authorJaroslav Kysela <perex@suse.cz>2006-06-01 18:34:01 +0200
committerJaroslav Kysela <perex@suse.cz>2006-09-23 10:36:42 +0200
commit42750b04c5baa7c5ffdf0a8be2b9b320efdf069f (patch)
tree52aea8f1eeb44405b67bc5b381cce6bc20e2bff6 /sound/pci
parent3eeab61aa3ddd3c0bedb7449ada1599de22fdb5a (diff)
[ALSA] Control API - TLV implementation for additional information like dB scale
This patch implements a TLV mechanism to transfer an additional information like dB scale to the user space. The types might be extended in future. Acked-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/pci')
-rw-r--r--sound/pci/ca0106/ca0106_mixer.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/pci/ca0106/ca0106_mixer.c b/sound/pci/ca0106/ca0106_mixer.c
index 146eed70dce..35309b3ed8c 100644
--- a/sound/pci/ca0106/ca0106_mixer.c
+++ b/sound/pci/ca0106/ca0106_mixer.c
@@ -70,9 +70,12 @@
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/info.h>
+#include <sound/tlv.h>
#include "ca0106.h"
+static DECLARE_TLV_DB_SCALE(snd_ca0106_db_scale, -5150, 75, 1);
+
static int snd_ca0106_shared_spdif_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
@@ -472,6 +475,7 @@ static int snd_ca0106_i2c_volume_put(struct snd_kcontrol *kcontrol,
.info = snd_ca0106_volume_info, \
.get = snd_ca0106_volume_get, \
.put = snd_ca0106_volume_put, \
+ .tlv = snd_ca0106_db_scale, \
.private_value = ((chid) << 8) | (reg) \
}