ASoC: wcd938x: Fix event generation for some controls

[ Upstream commit 10e7ff0047921e32b919ecee7be706dd33c107f8 ]

Currently wcd938x_*_put() unconditionally report that the value of the
control changed, resulting in spurious events being generated. Return 0 in
that case instead as we should. There is still an issue in the compander
control which is a bit more complex.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20220603122526.3914942-1-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c
index 4480c11..8cdc45e 100644 (file)
--- a/sound/soc/codecs/wcd938x.c
+++ b/sound/soc/codecs/wcd938x.c
@@ -2517,6 +2517,9 @@ static int wcd938x_tx_mode_put(struct snd_kcontrol *kcontrol,
        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
        int path = e->shift_l;
 
+       if (wcd938x->tx_mode[path] == ucontrol->value.enumerated.item[0])
+               return 0;
+
        wcd938x->tx_mode[path] = ucontrol->value.enumerated.item[0];
 
        return 1;
@@ -2539,6 +2542,9 @@ static int wcd938x_rx_hph_mode_put(struct snd_kcontrol *kcontrol,
        struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
        struct wcd938x_priv *wcd938x = snd_soc_component_get_drvdata(component);
 
+       if (wcd938x->hph_mode == ucontrol->value.enumerated.item[0])
+               return 0;
+
        wcd938x->hph_mode = ucontrol->value.enumerated.item[0];
 
        return 1;
@@ -2630,6 +2636,9 @@ static int wcd938x_ldoh_put(struct snd_kcontrol *kcontrol,
        struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
        struct wcd938x_priv *wcd938x = snd_soc_component_get_drvdata(component);
 
+       if (wcd938x->ldoh == ucontrol->value.integer.value[0])
+               return 0;
+
        wcd938x->ldoh = ucontrol->value.integer.value[0];
 
        return 1;
@@ -2652,6 +2661,9 @@ static int wcd938x_bcs_put(struct snd_kcontrol *kcontrol,
        struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
        struct wcd938x_priv *wcd938x = snd_soc_component_get_drvdata(component);
 
+       if (wcd938x->bcs_dis == ucontrol->value.integer.value[0])
+               return 0;
+
        wcd938x->bcs_dis = ucontrol->value.integer.value[0];
 
        return 1;