linux-kernel - [PATCH AUTOSEL 4.19 21/38] ASoC: dapm: Don't fold register value changes into notifications

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Message-Id: <20220530134924.1936816-21-sashal@kernel.org>
Date:   Mon, 30 May 2022 09:49:07 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Mark Brown <broonie@...nel.org>, Sasha Levin <sashal@...nel.org>,
        lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.com,
        alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 4.19 21/38] ASoC: dapm: Don't fold register value changes into notifications

From: Mark Brown <broonie@...nel.org>

[ Upstream commit ad685980469b9f9b99d4d6ea05f4cb8f57cb2234 ]

DAPM tracks and reports the value presented to the user from DAPM controls
separately to the register value, these may diverge during initialisation
or when an autodisable control is in use.

When writing DAPM controls we currently report that a change has occurred
if either the DAPM value or the value stored in the register has changed,
meaning that if the two are out of sync we may appear to report a spurious
event to userspace. Since we use this folded in value for nothing other
than the value reported to userspace simply drop the folding in of the
register change.

Signed-off-by: Mark Brown <broonie@...nel.org>
Link: https://lore.kernel.org/r/20220428161833.3690050-1-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/soc-dapm.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index af9f28dd957d..4d70e6bc2c12 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -3302,7 +3302,6 @@ int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
 			update.val = val;
 			card->update = &update;
 		}
-		change |= reg_change;
 
 		ret = soc_dapm_mixer_update_power(card, kcontrol, connect,
 						  rconnect);
@@ -3408,7 +3407,6 @@ int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
 			update.val = val;
 			card->update = &update;
 		}
-		change |= reg_change;
 
 		ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
 
-- 
2.35.1