ASoC: rsnd: enable enumerated DVC valume settings

DVC controls some digital volume features.
Volume Ramp is listed as "XX dB / YY steps",
and this enumerated settings are easy for users.
This patch adds rsnd_dvc_cfg_e and care about
enumerated settings.
Compiler will report like below at this point,
but, it will be removed if Volume Ramp was supported.
  warning: '_rsnd_dvc_pcm_new_e' defined but not used

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sh/rcar/dvc.c b/sound/soc/sh/rcar/dvc.c
index e7cfc71..8504f6b 100644 (file)
--- a/sound/soc/sh/rcar/dvc.c
+++ b/sound/soc/sh/rcar/dvc.c
@@ -19,6 +19,7 @@ struct rsnd_dvc_cfg {
        unsigned int max;
        unsigned int size;
        u32 *val;
+       const char * const *texts;
 };
 
 struct rsnd_dvc_cfg_m {
@@ -169,14 +170,23 @@ static int rsnd_dvc_volume_info(struct snd_kcontrol *kctrl,
 {
        struct rsnd_dvc_cfg *cfg = (struct rsnd_dvc_cfg *)kctrl->private_value;
 
-       uinfo->count = cfg->size;
-       uinfo->value.integer.min = 0;
-       uinfo->value.integer.max = cfg->max;
-
-       if (cfg->max == 1)
-               uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
-       else
-               uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+       if (cfg->texts) {
+               uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+               uinfo->count = cfg->size;
+               uinfo->value.enumerated.items = cfg->max;
+               if (uinfo->value.enumerated.item >= cfg->max)
+                       uinfo->value.enumerated.item = cfg->max - 1;
+               strlcpy(uinfo->value.enumerated.name,
+                       cfg->texts[uinfo->value.enumerated.item],
+                       sizeof(uinfo->value.enumerated.name));
+       } else {
+               uinfo->count = cfg->size;
+               uinfo->value.integer.min = 0;
+               uinfo->value.integer.max = cfg->max;
+               uinfo->type = (cfg->max == 1) ?
+                       SNDRV_CTL_ELEM_TYPE_BOOLEAN :
+                       SNDRV_CTL_ELEM_TYPE_INTEGER;
+       }
 
        return 0;
 }
@@ -188,7 +198,10 @@ static int rsnd_dvc_volume_get(struct snd_kcontrol *kctrl,
        int i;
 
        for (i = 0; i < cfg->size; i++)
-               ucontrol->value.integer.value[i] = cfg->val[i];
+               if (cfg->texts)
+                       ucontrol->value.enumerated.item[i] = cfg->val[i];
+               else
+                       ucontrol->value.integer.value[i] = cfg->val[i];
 
        return 0;
 }
@@ -201,8 +214,13 @@ static int rsnd_dvc_volume_put(struct snd_kcontrol *kctrl,
        int i, change = 0;
 
        for (i = 0; i < cfg->size; i++) {
-               change |= (ucontrol->value.integer.value[i] != cfg->val[i]);
-               cfg->val[i] = ucontrol->value.integer.value[i];
+               if (cfg->texts) {
+                       change |= (ucontrol->value.enumerated.item[i] != cfg->val[i]);
+                       cfg->val[i] = ucontrol->value.enumerated.item[i];
+               } else {
+                       change |= (ucontrol->value.integer.value[i] != cfg->val[i]);
+                       cfg->val[i] = ucontrol->value.integer.value[i];
+               }
        }
 
        if (change)
@@ -266,6 +284,21 @@ static int _rsnd_dvc_pcm_new_s(struct rsnd_mod *mod,
        return __rsnd_dvc_pcm_new(mod, rdai, rtd, name, &private->cfg);
 }
 
+static int _rsnd_dvc_pcm_new_e(struct rsnd_mod *mod,
+                              struct rsnd_dai *rdai,
+                              struct snd_soc_pcm_runtime *rtd,
+                              const unsigned char *name,
+                              struct rsnd_dvc_cfg_s *private,
+                              const char * const *texts,
+                              u32 max)
+{
+       private->cfg.max        = max;
+       private->cfg.size       = 1;
+       private->cfg.val        = &private->val;
+       private->cfg.texts      = texts;
+       return __rsnd_dvc_pcm_new(mod, rdai, rtd, name, &private->cfg);
+}
+
 static int rsnd_dvc_pcm_new(struct rsnd_mod *mod,
                            struct rsnd_dai *rdai,
                            struct snd_soc_pcm_runtime *rtd)