ALSA: ice1724: ESI W192M: Add TLV support for control value in dB scale

Add TLV support to control volume using dB scale for input and ouput on ESI W192M.

Signed-off-by: Clément Guedez <klem.dev@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 18 insertions, 2 deletions

diff --git a/sound/pci/ice1712/wtm.c b/sound/pci/ice1712/wtm.c
index 59483b4d6dd0..c7ffafaa1c5c 100644
--- a/sound/pci/ice1712/wtm.c
+++ b/sound/pci/ice1712/wtm.c
@@ -29,6 +29,7 @@
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <sound/core.h>
+#include <sound/tlv.h>
 
 #include "ice1712.h"
 #include "envy24ht.h"
@@ -380,17 +381,25 @@ static int stac9460_mic_sw_put(struct snd_kcontrol *kcontrol,
         return change;
 }
 
+
+/*Limits value in dB for fader*/
+static const DECLARE_TLV_DB_SCALE(db_scale_dac, -19125, 75, 0);
+static const DECLARE_TLV_DB_SCALE(db_scale_adc, 0, 150, 0);
+
 /*
  * Control tabs
  */
 static struct snd_kcontrol_new stac9640_controls[] = {
         {
                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                            SNDRV_CTL_ELEM_ACCESS_TLV_READ),
                 .name = "Master Playback Switch",
                 .info = stac9460_dac_mute_info,
                 .get = stac9460_dac_mute_get,
                 .put = stac9460_dac_mute_put,
-                .private_value = 1
+                .private_value = 1,
+                .tlv = { .p = db_scale_dac }
         },
         {
                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
@@ -419,11 +428,15 @@ static struct snd_kcontrol_new stac9640_controls[] = {
         },
         {
                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                            SNDRV_CTL_ELEM_ACCESS_TLV_READ),
+
                 .name = "DAC Volume",
                 .count = 8,
                 .info = stac9460_dac_vol_info,
                 .get = stac9460_dac_vol_get,
                 .put = stac9460_dac_vol_put,
+                .tlv = { .p = db_scale_dac }
         },
         {
                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
@@ -435,12 +448,15 @@ static struct snd_kcontrol_new stac9640_controls[] = {
         },
         {
                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+                .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                            SNDRV_CTL_ELEM_ACCESS_TLV_READ),
+
                 .name = "ADC Volume",
                 .count = 2,
                 .info = stac9460_adc_vol_info,
                 .get = stac9460_adc_vol_get,
                 .put = stac9460_adc_vol_put,
-
+                .tlv = { .p = db_scale_adc }
         }
 };