linux-kernel - [PATCH 4/4] ASoC: tegra: Fix kcontrol put callback in DSPK

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Message-ID: <1635915897-32313-5-git-send-email-spujar@nvidia.com>
Date:   Wed, 3 Nov 2021 10:34:57 +0530
From:   Sameer Pujar <spujar@...dia.com>
To:     <broonie@...nel.org>, <lgirdwood@...il.com>, <perex@...ex.cz>,
        <tiwai@...e.com>
CC:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <alsa-devel@...a-project.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Sameer Pujar <spujar@...dia.com>
Subject: [PATCH 4/4] 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: 327ef6470266 ("ASoC: tegra: Add Tegra186 based DSPK driver")
Suggested-by: Jaroslav Kysela <perex@...ex.cz>
Suggested-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sameer Pujar <spujar@...dia.com>
---
 sound/soc/tegra/tegra186_dspk.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/tegra/tegra186_dspk.c b/sound/soc/tegra/tegra186_dspk.c
index 8ee9a77..3b1bdb7 100644
--- a/sound/soc/tegra/tegra186_dspk.c
+++ b/sound/soc/tegra/tegra186_dspk.c
@@ -67,8 +67,10 @@ static int tegra186_dspk_put_control(struct snd_kcontrol *kcontrol,
 		dspk->mono_to_stereo = val;
 	else if (strstr(kcontrol->id.name, "Stereo To Mono"))
 		dspk->stereo_to_mono = val;
+	else
+		return 0;
 
-	return 0;
+	return 1;
 }
 
 static int __maybe_unused tegra186_dspk_runtime_suspend(struct device *dev)
-- 
2.7.4