ASoC: tegra: Fix kcontrol put callback in DSPK

The kcontrol put callback is expected to return 1 when there is change
in HW or when the update is acknowledged by driver. This would ensure
that change notifications are sent to subscribed applications. Update
the DSPK driver accordingly.

Fixes: 327ef647 ("ASoC: tegra: Add Tegra186 based DSPK driver")
Suggested-by: NJaroslav Kysela <perex@perex.cz>
Suggested-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NSameer Pujar <spujar@nvidia.com>
Reviewed-by: NTakashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/1637219231-406-11-git-send-email-spujar@nvidia.comSigned-off-by: NMark Brown <broonie@kernel.org>

sound/soc/tegra/tegra186_dspk.c

@@ -26,50 +26,162 @@ static const struct reg_default tegra186_dspk_reg_defaults[] = {
 	{ TEGRA186_DSPK_CODEC_CTRL,  0x03000000 },
 };
 
-static int tegra186_dspk_get_control(struct snd_kcontrol *kcontrol,
+static int tegra186_dspk_get_fifo_th(struct snd_kcontrol *kcontrol,
 				     struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
 	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
 
-	if (strstr(kcontrol->id.name, "FIFO Threshold"))
-		ucontrol->value.integer.value[0] = dspk->rx_fifo_th;
-	else if (strstr(kcontrol->id.name, "OSR Value"))
-		ucontrol->value.enumerated.item[0] = dspk->osr_val;
-	else if (strstr(kcontrol->id.name, "LR Polarity Select"))
-		ucontrol->value.enumerated.item[0] = dspk->lrsel;
-	else if (strstr(kcontrol->id.name, "Channel Select"))
-		ucontrol->value.enumerated.item[0] = dspk->ch_sel;
-	else if (strstr(kcontrol->id.name, "Mono To Stereo"))
-		ucontrol->value.enumerated.item[0] = dspk->mono_to_stereo;
-	else if (strstr(kcontrol->id.name, "Stereo To Mono"))
-		ucontrol->value.enumerated.item[0] = dspk->stereo_to_mono;
+	ucontrol->value.integer.value[0] = dspk->rx_fifo_th;
 
 	return 0;
 }
 
-static int tegra186_dspk_put_control(struct snd_kcontrol *kcontrol,
+static int tegra186_dspk_put_fifo_th(struct snd_kcontrol *kcontrol,
 				     struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
 	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
+	int value = ucontrol->value.integer.value[0];
 
-	if (strstr(kcontrol->id.name, "FIFO Threshold"))
-		dspk->rx_fifo_th = ucontrol->value.integer.value[0];
-	else if (strstr(kcontrol->id.name, "OSR Value"))
-		dspk->osr_val = ucontrol->value.enumerated.item[0];
-	else if (strstr(kcontrol->id.name, "LR Polarity Select"))
-		dspk->lrsel = ucontrol->value.enumerated.item[0];
-	else if (strstr(kcontrol->id.name, "Channel Select"))
-		dspk->ch_sel = ucontrol->value.enumerated.item[0];
-	else if (strstr(kcontrol->id.name, "Mono To Stereo"))
-		dspk->mono_to_stereo = ucontrol->value.enumerated.item[0];
-	else if (strstr(kcontrol->id.name, "Stereo To Mono"))
-		dspk->stereo_to_mono = ucontrol->value.enumerated.item[0];
+	if (value == dspk->rx_fifo_th)
+		return 0;
+
+	dspk->rx_fifo_th = value;
+
+	return 1;
+}
+
+static int tegra186_dspk_get_osr_val(struct snd_kcontrol *kcontrol,
+				     struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
+	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
+
+	ucontrol->value.enumerated.item[0] = dspk->osr_val;
+
+	return 0;
+}
+
+static int tegra186_dspk_put_osr_val(struct snd_kcontrol *kcontrol,
+				     struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
+	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
+	unsigned int value = ucontrol->value.enumerated.item[0];
+
+	if (value == dspk->osr_val)
+		return 0;
+
+	dspk->osr_val = value;
+
+	return 1;
+}
+
+static int tegra186_dspk_get_pol_sel(struct snd_kcontrol *kcontrol,
+				     struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
+	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
+
+	ucontrol->value.enumerated.item[0] = dspk->lrsel;
+
+	return 0;
+}
+
+static int tegra186_dspk_put_pol_sel(struct snd_kcontrol *kcontrol,
+				     struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
+	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
+	unsigned int value = ucontrol->value.enumerated.item[0];
+
+	if (value == dspk->lrsel)
+		return 0;
+
+	dspk->lrsel = value;
+
+	return 1;
+}
+
+static int tegra186_dspk_get_ch_sel(struct snd_kcontrol *kcontrol,
+				    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
+	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
+
+	ucontrol->value.enumerated.item[0] = dspk->ch_sel;
+
+	return 0;
+}
+
+static int tegra186_dspk_put_ch_sel(struct snd_kcontrol *kcontrol,
+				    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
+	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
+	unsigned int value = ucontrol->value.enumerated.item[0];
+
+	if (value == dspk->ch_sel)
+		return 0;
+
+	dspk->ch_sel = value;
+
+	return 1;
+}
+
+static int tegra186_dspk_get_mono_to_stereo(struct snd_kcontrol *kcontrol,
+					    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
+	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
+
+	ucontrol->value.enumerated.item[0] = dspk->mono_to_stereo;
+
+	return 0;
+}
+
+static int tegra186_dspk_put_mono_to_stereo(struct snd_kcontrol *kcontrol,
+					    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
+	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
+	unsigned int value = ucontrol->value.enumerated.item[0];
+
+	if (value == dspk->mono_to_stereo)
+		return 0;
+
+	dspk->mono_to_stereo = value;
+
+	return 1;
+}
+
+static int tegra186_dspk_get_stereo_to_mono(struct snd_kcontrol *kcontrol,
+					    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
+	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
+
+	ucontrol->value.enumerated.item[0] = dspk->stereo_to_mono;
 
 	return 0;
 }
 
+static int tegra186_dspk_put_stereo_to_mono(struct snd_kcontrol *kcontrol,
+					    struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
+	struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
+	unsigned int value = ucontrol->value.enumerated.item[0];
+
+	if (value == dspk->stereo_to_mono)
+		return 0;
+
+	dspk->stereo_to_mono = value;
+
+	return 1;
+}
+
 static int __maybe_unused tegra186_dspk_runtime_suspend(struct device *dev)
 {
 	struct tegra186_dspk *dspk = dev_get_drvdata(dev);
@@ -278,17 +390,19 @@ static const struct soc_enum tegra186_dspk_lrsel_enum =
 static const struct snd_kcontrol_new tegrat186_dspk_controls[] = {
 	SOC_SINGLE_EXT("FIFO Threshold", SND_SOC_NOPM, 0,
 		       TEGRA186_DSPK_RX_FIFO_DEPTH - 1, 0,
-		       tegra186_dspk_get_control, tegra186_dspk_put_control),
+		       tegra186_dspk_get_fifo_th, tegra186_dspk_put_fifo_th),
 	SOC_ENUM_EXT("OSR Value", tegra186_dspk_osr_enum,
-		     tegra186_dspk_get_control, tegra186_dspk_put_control),
+		     tegra186_dspk_get_osr_val, tegra186_dspk_put_osr_val),
 	SOC_ENUM_EXT("LR Polarity Select", tegra186_dspk_lrsel_enum,
-		     tegra186_dspk_get_control, tegra186_dspk_put_control),
+		     tegra186_dspk_get_pol_sel, tegra186_dspk_put_pol_sel),
 	SOC_ENUM_EXT("Channel Select", tegra186_dspk_ch_sel_enum,
-		     tegra186_dspk_get_control, tegra186_dspk_put_control),
+		     tegra186_dspk_get_ch_sel, tegra186_dspk_put_ch_sel),
 	SOC_ENUM_EXT("Mono To Stereo", tegra186_dspk_mono_conv_enum,
-		     tegra186_dspk_get_control, tegra186_dspk_put_control),
+		     tegra186_dspk_get_mono_to_stereo,
+		     tegra186_dspk_put_mono_to_stereo),
 	SOC_ENUM_EXT("Stereo To Mono", tegra186_dspk_stereo_conv_enum,
-		     tegra186_dspk_get_control, tegra186_dspk_put_control),
+		     tegra186_dspk_get_stereo_to_mono,
+		     tegra186_dspk_put_stereo_to_mono),
 };
 
 static const struct snd_soc_component_driver tegra186_dspk_cmpnt = {