[ALSA] Add dB scale information to vxpocket and vx222 drivers
[linux-2.6.git] / sound / drivers / vx / vx_mixer.c
index c1d7fcd..1613ed8 100644 (file)
@@ -23,6 +23,7 @@
 #include <sound/driver.h>
 #include <sound/core.h>
 #include <sound/control.h>
+#include <sound/tlv.h>
 #include <sound/vx_core.h>
 #include "vx_cmd.h"
 
@@ -455,10 +456,13 @@ static int vx_output_level_put(struct snd_kcontrol *kcontrol, struct snd_ctl_ele
 
 static struct snd_kcontrol_new vx_control_output_level = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
+       .access =       (SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                        SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        .name =         "Master Playback Volume",
        .info =         vx_output_level_info,
        .get =          vx_output_level_get,
        .put =          vx_output_level_put,
+       /* tlv will be filled later */
 };
 
 /*
@@ -712,12 +716,17 @@ static int vx_monitor_sw_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_
        return 0;
 }
 
+static DECLARE_TLV_DB_SCALE(db_scale_audio_gain, -10975, 25, 0);
+
 static struct snd_kcontrol_new vx_control_audio_gain = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
+       .access =       (SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                        SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        /* name will be filled later */
        .info =         vx_audio_gain_info,
        .get =          vx_audio_gain_get,
-       .put =          vx_audio_gain_put
+       .put =          vx_audio_gain_put,
+       .tlv = { .p = db_scale_audio_gain },
 };
 static struct snd_kcontrol_new vx_control_output_switch = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
@@ -729,9 +738,12 @@ static struct snd_kcontrol_new vx_control_output_switch = {
 static struct snd_kcontrol_new vx_control_monitor_gain = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
        .name =         "Monitoring Volume",
+       .access =       (SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                        SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        .info =         vx_audio_gain_info,     /* shared */
        .get =          vx_audio_monitor_get,
-       .put =          vx_audio_monitor_put
+       .put =          vx_audio_monitor_put,
+       .tlv = { .p = db_scale_audio_gain },
 };
 static struct snd_kcontrol_new vx_control_monitor_switch = {
        .iface =        SNDRV_CTL_ELEM_IFACE_MIXER,
@@ -918,6 +930,7 @@ int snd_vx_mixer_new(struct vx_core *chip)
        for (i = 0; i < chip->hw->num_outs; i++) {
                temp = vx_control_output_level;
                temp.index = i;
+               temp.tlv.p = chip->hw->output_level_db_scale;
                if ((err = snd_ctl_add(card, snd_ctl_new1(&temp, chip))) < 0)
                        return err;
        }