[PATCH] ASoC: rt1011: Fix 'I2S Reference' enum control

[Peter Ujfalusi]

There are several things the patch adding the support for 'I2S Reference'
got wrong:
- "None" selection is in fact equals to last selected reference
- The custom put overrides RX/TX len, TDM slot sizes, etc
- the enum is useless in most part for the reference tracking
- there is no need for EXT control as there is a single bit in
  RT1011_TDM1_SET_1 register (bit 7) which selects the reference
- it was using ucontrol->value.integer.value[0] in the put/get callbacks
  which causes access to 'I2S Reference' enum with alsamixer to fail:
$ alsamixer
cannot load mixer controls: Invalid argument

cml_rt1011_rt5682 cml_rt1011_rt5682: control 2:0:0:TL I2S Reference:0: access overflow

It should have used ucontrol->value.enumerated.item[0], but since there is
no need for the custom code, it does not really matter.

Fixes: 87f40af26c262 ("ASoC: rt1011: add i2s reference control for rt1011")
Reported-by: Seppo Ingalsuo <seppo.ingalsuo at linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi at linux.intel.com>
---
Hi,

This patch is an iteration on
https://lore.kernel.org/alsa-devel/20211011144518.2518-1-peter.ujfalusi@linux.intel.com/

to fix 87f40af26c262 ("ASoC: rt1011: add i2s reference control for rt1011").

In essence it is reverting the original patch to use
SOC_ENUM_SINGLE_DECL/SOC_ENUM to handle the bit to select the I2S reference.

Regards,
Peter

 sound/soc/codecs/rt1011.c | 56 +++++----------------------------------
 sound/soc/codecs/rt1011.h |  7 -----
 2 files changed, 6 insertions(+), 57 deletions(-)

diff --git a/sound/soc/codecs/rt1011.c b/sound/soc/codecs/rt1011.c
index 508597866dff..297af7ff824c 100644
--- a/sound/soc/codecs/rt1011.c
+++ b/sound/soc/codecs/rt1011.c
@@ -1311,56 +1311,13 @@ static int rt1011_r0_load_info(struct snd_kcontrol *kcontrol,
 	.put = rt1011_r0_load_mode_put \
 }
 
-static const char * const rt1011_i2s_ref[] = {
-	"None", "Left Channel", "Right Channel"
+static const char * const rt1011_i2s_ref_texts[] = {
+	"Left Channel", "Right Channel"
 };
 
-static SOC_ENUM_SINGLE_DECL(rt1011_i2s_ref_enum, 0, 0,
-	rt1011_i2s_ref);
-
-static int rt1011_i2s_ref_put(struct snd_kcontrol *kcontrol,
-		struct snd_ctl_elem_value *ucontrol)
-{
-	struct snd_soc_component *component =
-		snd_soc_kcontrol_component(kcontrol);
-	struct rt1011_priv *rt1011 =
-		snd_soc_component_get_drvdata(component);
-	int i2s_ref_ch = ucontrol->value.integer.value[0];
-
-	switch (i2s_ref_ch) {
-	case RT1011_I2S_REF_LEFT_CH:
-		regmap_write(rt1011->regmap, RT1011_TDM_TOTAL_SET, 0x0240);
-		regmap_write(rt1011->regmap, RT1011_TDM1_SET_2, 0x8);
-		regmap_write(rt1011->regmap, RT1011_TDM1_SET_1, 0x1022);
-		regmap_write(rt1011->regmap, RT1011_ADCDAT_OUT_SOURCE, 0x4);
-		break;
-	case RT1011_I2S_REF_RIGHT_CH:
-		regmap_write(rt1011->regmap, RT1011_TDM_TOTAL_SET, 0x0240);
-		regmap_write(rt1011->regmap, RT1011_TDM1_SET_2, 0x8);
-		regmap_write(rt1011->regmap, RT1011_TDM1_SET_1, 0x10a2);
-		regmap_write(rt1011->regmap, RT1011_ADCDAT_OUT_SOURCE, 0x4);
-		break;
-	default:
-		dev_info(component->dev, "I2S Reference: Do nothing\n");
-	}
-
-	rt1011->i2s_ref = ucontrol->value.integer.value[0];
-
-	return 0;
-}
-
-static int rt1011_i2s_ref_get(struct snd_kcontrol *kcontrol,
-		struct snd_ctl_elem_value *ucontrol)
-{
-	struct snd_soc_component *component =
-		snd_soc_kcontrol_component(kcontrol);
-	struct rt1011_priv *rt1011 =
-		snd_soc_component_get_drvdata(component);
-
-	ucontrol->value.integer.value[0] = rt1011->i2s_ref;
-
-	return 0;
-}
+static SOC_ENUM_SINGLE_DECL(rt1011_i2s_ref_enum,
+			    RT1011_TDM1_SET_1, 7,
+			    rt1011_i2s_ref_texts);
 
 static const struct snd_kcontrol_new rt1011_snd_controls[] = {
 	/* I2S Data In Selection */
@@ -1401,8 +1358,7 @@ static const struct snd_kcontrol_new rt1011_snd_controls[] = {
 	SOC_SINGLE("R0 Temperature", RT1011_STP_INITIAL_RESISTANCE_TEMP,
 		2, 255, 0),
 	/* I2S Reference */
-	SOC_ENUM_EXT("I2S Reference", rt1011_i2s_ref_enum,
-		rt1011_i2s_ref_get, rt1011_i2s_ref_put),
+	SOC_ENUM("I2S Reference", rt1011_i2s_ref_enum),
 };
 
 static int rt1011_is_sys_clk_from_pll(struct snd_soc_dapm_widget *source,
diff --git a/sound/soc/codecs/rt1011.h b/sound/soc/codecs/rt1011.h
index afb2fad94216..68fadc15fa8c 100644
--- a/sound/soc/codecs/rt1011.h
+++ b/sound/soc/codecs/rt1011.h
@@ -654,12 +654,6 @@ enum {
 	RT1011_AIFS
 };
 
-enum {
-	RT1011_I2S_REF_NONE,
-	RT1011_I2S_REF_LEFT_CH,
-	RT1011_I2S_REF_RIGHT_CH,
-};
-
 /* BiQual & DRC related settings */
 #define RT1011_BQ_DRC_NUM 128
 struct rt1011_bq_drc_params {
@@ -698,7 +692,6 @@ struct rt1011_priv {
 	unsigned int r0_reg, cali_done;
 	unsigned int r0_calib, temperature_calib;
 	int recv_spk_mode;
-	unsigned int i2s_ref;
 };
 
 #endif		/* end of _RT1011_H_ */
-- 
2.33.0