[ALSA] Add dB scale information to trident driver

Added the dB scale information to trident driver.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/pci/trident/trident_main.c

@@ -40,6 +40,7 @@
 #include <sound/core.h>
 #include <sound/info.h>
 #include <sound/control.h>
+#include <sound/tlv.h>
 #include <sound/trident.h>
 #include <sound/asoundef.h>
 
@@ -2627,6 +2628,8 @@ static int snd_trident_vol_control_get(struct snd_kcontrol *kcontrol,
 	return 0;
 }
 
+static DECLARE_TLV_DB_SCALE(db_scale_gvol, -6375, 25, 0);
+
 static int snd_trident_vol_control_put(struct snd_kcontrol *kcontrol,
 				       struct snd_ctl_elem_value *ucontrol)
 {
@@ -2653,6 +2656,7 @@ static struct snd_kcontrol_new snd_trident_vol_music_control __devinitdata =
 	.get =		snd_trident_vol_control_get,
 	.put =		snd_trident_vol_control_put,
 	.private_value = 16,
+	.tlv = { .p = db_scale_gvol },
 };
 
 static struct snd_kcontrol_new snd_trident_vol_wave_control __devinitdata =
@@ -2663,6 +2667,7 @@ static struct snd_kcontrol_new snd_trident_vol_wave_control __devinitdata =
 	.get =		snd_trident_vol_control_get,
 	.put =		snd_trident_vol_control_put,
 	.private_value = 0,
+	.tlv = { .p = db_scale_gvol },
 };
 
 /*---------------------------------------------------------------------------
@@ -2730,6 +2735,7 @@ static struct snd_kcontrol_new snd_trident_pcm_vol_control __devinitdata =
 	.info =		snd_trident_pcm_vol_control_info,
 	.get =		snd_trident_pcm_vol_control_get,
 	.put =		snd_trident_pcm_vol_control_put,
+	/* FIXME: no tlv yet */
 };
 
 /*---------------------------------------------------------------------------
@@ -2839,6 +2845,8 @@ static int snd_trident_pcm_rvol_control_put(struct snd_kcontrol *kcontrol,
 	return change;
 }
 
+static DECLARE_TLV_DB_SCALE(db_scale_crvol, -3175, 25, 1);
+
 static struct snd_kcontrol_new snd_trident_pcm_rvol_control __devinitdata =
 {
 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
@@ -2848,6 +2856,7 @@ static struct snd_kcontrol_new snd_trident_pcm_rvol_control __devinitdata =
 	.info =		snd_trident_pcm_rvol_control_info,
 	.get =		snd_trident_pcm_rvol_control_get,
 	.put =		snd_trident_pcm_rvol_control_put,
+	.tlv = { .p = db_scale_crvol },
 };
 
 /*---------------------------------------------------------------------------
@@ -2903,6 +2912,7 @@ static struct snd_kcontrol_new snd_trident_pcm_cvol_control __devinitdata =
 	.info =		snd_trident_pcm_cvol_control_info,
 	.get =		snd_trident_pcm_cvol_control_get,
 	.put =		snd_trident_pcm_cvol_control_put,
+	.tlv = { .p = db_scale_crvol },
 };
 
 static void snd_trident_notify_pcm_change1(struct snd_card *card,