From 9f6ab25063f04597e02968ae8393e8f4703c1563 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 23 Aug 2006 12:14:25 +0200
Subject: [PATCH] [ALSA] Add dB scale information to cs4281 driver

Added the dB scale information to cs4281 driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
---
 sound/pci/cs4281.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/pci/cs4281.c b/sound/pci/cs4281.c
index 9631456ec3..1990430a21 100644
--- a/sound/pci/cs4281.c
+++ b/sound/pci/cs4281.c
@@ -33,6 +33,7 @@
 #include <sound/pcm.h>
 #include <sound/rawmidi.h>
 #include <sound/ac97_codec.h>
+#include <sound/tlv.h>
 #include <sound/opl3.h>
 #include <sound/initval.h>
 
@@ -1054,6 +1055,8 @@ static int snd_cs4281_put_volume(struct snd_kcontrol *kcontrol,
 	return change;
 }
 
+static DECLARE_TLV_DB_SCALE(db_scale_dsp, -4650, 150, 0);
+
 static struct snd_kcontrol_new snd_cs4281_fm_vol = 
 {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
@@ -1062,6 +1065,7 @@ static struct snd_kcontrol_new snd_cs4281_fm_vol =
 	.get = snd_cs4281_get_volume,
 	.put = snd_cs4281_put_volume, 
 	.private_value = ((BA0_FMLVC << 16) | BA0_FMRVC),
+	.tlv = { .p = db_scale_dsp },
 };
 
 static struct snd_kcontrol_new snd_cs4281_pcm_vol = 
@@ -1072,6 +1076,7 @@ static struct snd_kcontrol_new snd_cs4281_pcm_vol =
 	.get = snd_cs4281_get_volume,
 	.put = snd_cs4281_put_volume, 
 	.private_value = ((BA0_PPLVC << 16) | BA0_PPRVC),
+	.tlv = { .p = db_scale_dsp },
 };
 
 static void snd_cs4281_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
-- 
2.39.5