[PATCH 2/2] ASoC: fsl_spdif: Add kctl for configuring TX validity bit

From: Shengjiu Wang
Date: Tue Jul 07 2020 - 04:58:51 EST


Add one kctl for configuring TX validity bit from user
space.

The type of this kctl is boolean:
on - Outgoing validity always set
off - Outgoing validity always clear

Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx>
---
sound/soc/fsl/fsl_spdif.c | 47 +++++++++++++++++++++++++++++++++++----
1 file changed, 43 insertions(+), 4 deletions(-)

diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index 576370dc6e70..37053e8f29d0 100644
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -776,8 +776,8 @@ static int fsl_spdif_vbit_info(struct snd_kcontrol *kcontrol,
}

/* Get valid good bit from interrupt status register */
-static int fsl_spdif_vbit_get(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
+static int fsl_spdif_rx_vbit_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
@@ -791,6 +791,35 @@ static int fsl_spdif_vbit_get(struct snd_kcontrol *kcontrol,
return 0;
}

+static int fsl_spdif_tx_vbit_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 val;
+
+ regmap_read(regmap, REG_SPDIF_SCR, &val);
+ val = (val & SCR_VAL_MASK) >> SCR_VAL_OFFSET;
+ val = 1 - val;
+ ucontrol->value.integer.value[0] = val;
+
+ return 0;
+}
+
+static int fsl_spdif_tx_vbit_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 val = (1 - ucontrol->value.integer.value[0]) << SCR_VAL_OFFSET;
+
+ regmap_update_bits(regmap, REG_SPDIF_SCR, SCR_VAL_MASK, val);
+
+ return 0;
+}
+
/* DPLL lock information */
static int fsl_spdif_rxrate_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
@@ -948,11 +977,21 @@ static struct snd_kcontrol_new fsl_spdif_ctrls[] = {
/* Valid bit error controller */
{
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
- .name = "IEC958 V-Bit Errors",
+ .name = "IEC958 RX V-Bit Errors",
.access = SNDRV_CTL_ELEM_ACCESS_READ |
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
.info = fsl_spdif_vbit_info,
- .get = fsl_spdif_vbit_get,
+ .get = fsl_spdif_rx_vbit_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "IEC958 TX V-Bit",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_WRITE |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = fsl_spdif_vbit_info,
+ .get = fsl_spdif_tx_vbit_get,
+ .put = fsl_spdif_tx_vbit_put,
},
/* DPLL lock info get controller */
{
--
2.21.0