ASoC: da7210: Add HeadPhone Playback Volume control

HeadPhone Playback Volume control register of DA7210 has
reserved area. This patch considered it as mute.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 27 insertions, 4 deletions

diff --git a/sound/soc/codecs/da7210.c b/sound/soc/codecs/da7210.c
index a83aa187a7f2..3e42d1e0e601 100644
--- a/sound/soc/codecs/da7210.c
+++ b/sound/soc/codecs/da7210.c
@@ -23,6 +23,7 @@
 #include <sound/pcm_params.h>
 #include <sound/soc-dapm.h>
 #include <sound/initval.h>
+#include <sound/tlv.h>
 
 #include "da7210.h"
 
@@ -136,6 +137,29 @@
 
 #define DA7210_VERSION "0.0.1"
 
+/*
+ * Playback Volume
+ *
+ * max          : 0x3F (+15.0 dB)
+ *                 (1.5 dB step)
+ * min          : 0x11 (-54.0 dB)
+ * mute         : 0x10
+ * reserved     : 0x00 - 0x0F
+ *
+ * ** FIXME **
+ *
+ * Reserved area are considered as "mute".
+ * -> min = -79.5 dB
+ */
+static const DECLARE_TLV_DB_SCALE(hp_out_tlv, -7950, 150, 1);
+
+static const struct snd_kcontrol_new da7210_snd_controls[] = {
+
+        SOC_DOUBLE_R_TLV("HeadPhone Playback Volume",
+                         DA7210_HP_L_VOL, DA7210_HP_R_VOL,
+                         0, 0x3F, 0, hp_out_tlv),
+};
+
 /* Codec private data */
 struct da7210_priv {
         struct snd_soc_codec codec;
@@ -218,10 +242,6 @@ static int da7210_startup(struct snd_pcm_substream *substream,
         struct snd_soc_codec *codec = dai->codec;
 
         if (is_play) {
-                /* PlayBack Volume 40 */
-                snd_soc_update_bits(codec, DA7210_HP_L_VOL, 0x3F, 40);
-                snd_soc_update_bits(codec, DA7210_HP_R_VOL, 0x3F, 40);
-
                 /* Enable Out */
                 snd_soc_update_bits(codec, DA7210_OUTMIX_L, 0x1F, 0x10);
                 snd_soc_update_bits(codec, DA7210_OUTMIX_R, 0x1F, 0x10);
@@ -647,6 +667,9 @@ static int da7210_probe(struct platform_device *pdev)
         if (ret < 0)
                 goto pcm_err;
 
+        snd_soc_add_controls(da7210_codec, da7210_snd_controls,
+                             ARRAY_SIZE(da7210_snd_controls));
+
         dev_info(&pdev->dev, "DA7210 Audio Codec %s\n", DA7210_VERSION);
 
 pcm_err: