From 10e7ff0047921e32b919ecee7be706dd33c107f8 Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@kernel.org>
Date: Fri, 3 Jun 2022 14:25:26 +0200
Subject: [PATCH] ASoC: wcd938x: Fix event generation for some controls
Git-commit: 10e7ff0047921e32b919ecee7be706dd33c107f8
Patch-mainline: v5.19-rc6
References: git-fixes

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
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/codecs/wcd938x.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c
index c1b61b997f69..781ae569be29 100644
--- a/sound/soc/codecs/wcd938x.c
+++ b/sound/soc/codecs/wcd938x.c
@@ -2519,6 +2519,9 @@ 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;
@@ -2541,6 +2544,9 @@ 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;
@@ -2632,6 +2638,9 @@ 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;
@@ -2654,6 +2663,9 @@ 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;
-- 
2.35.3