linux-kernel - [PATCH 5.17 039/140] ASoC: meson: Fix event generation for G12A tohdmi mux

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Message-Id: <20220510130742.736878992@linuxfoundation.org>
Date:   Tue, 10 May 2022 15:07:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Jerome Brunet <jbrunet@...libre.com>
Subject: [PATCH 5.17 039/140] ASoC: meson: Fix event generation for G12A tohdmi mux

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

commit 12131008fc13ff7f7690d170b7a8f72d24fd7d1e upstream.

The G12A tohdmi has a custom put() operation which returns 0 when the value
of the mux changes, meaning that events are not generated for userspace.
Change to return 1 in this case, the function returns early in the case
where there is no change.

Signed-off-by: Mark Brown <broonie@...nel.org>
Reviewed-by: Jerome Brunet <jbrunet@...libre.com>
Link: https://lore.kernel.org/r/20220421123803.292063-4-broonie@kernel.org
Signed-off-by: Mark Brown <broonie@...nel.org>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/soc/meson/g12a-tohdmitx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/soc/meson/g12a-tohdmitx.c
+++ b/sound/soc/meson/g12a-tohdmitx.c
@@ -67,7 +67,7 @@ static int g12a_tohdmitx_i2s_mux_put_enu
 
 	snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
 
-	return 0;
+	return 1;
 }
 
 static SOC_ENUM_SINGLE_DECL(g12a_tohdmitx_i2s_mux_enum, TOHDMITX_CTRL0,