[ALSA] snd-emu10k1: Implement dB gain infomation.

Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 5 insertions, 0 deletions

diff --git a/sound/pci/emu10k1/p16v.c b/sound/pci/emu10k1/p16v.c
index 9905651935fb..1e44714b8623 100644
--- a/sound/pci/emu10k1/p16v.c
+++ b/sound/pci/emu10k1/p16v.c
@@ -100,6 +100,7 @@
 #include <sound/pcm.h>
 #include <sound/ac97_codec.h>
 #include <sound/info.h>
+#include <sound/tlv.h>
 #include <sound/emu10k1.h>
 #include "p16v.h"
 
@@ -784,12 +785,16 @@ static int snd_p16v_capture_channel_put(struct snd_kcontrol *kcontrol,
         }
         return change;
 }
+static DECLARE_TLV_DB_SCALE(snd_p16v_db_scale1, -5175, 25, 1);
 
 #define P16V_VOL(xname,xreg,xhl) { \
         .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
+        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |             \
+                  SNDRV_CTL_ELEM_ACCESS_TLV_READ,               \
         .info = snd_p16v_volume_info, \
         .get = snd_p16v_volume_get, \
         .put = snd_p16v_volume_put, \
+        .tlv.p = snd_p16v_db_scale1, \
         .private_value = ((xreg) | ((xhl) << 8)) \
 }