linux-kernel - [PATCH v2 2/6] ASoC: codecs: jz4725b: fix reported volume for Master ctl

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Date:   Mon, 10 Oct 2022 21:54:19 +0300
From:   Siarhei Volkau <lis8215@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Siarhei Volkau <lis8215@...il.com>,
        Paul Cercueil <paul@...pouillou.net>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, linux-mips@...r.kernel.org,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/6] ASoC: codecs: jz4725b: fix reported volume for Master ctl

DAC volume control is the Master Playback Volume at the moment
and it reports wrong levels in alsamixer and other alsa apps.

The patch fixes that, as stated in manual on the jz4725b SoC
(16.6.3.4 Programmable attenuation: GOD) the ctl range varies
from -22.5dB to 0dB with 1.5dB step.

Signed-off-by: Siarhei Volkau <lis8215@...il.com>
---
 sound/soc/codecs/jz4725b.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/jz4725b.c b/sound/soc/codecs/jz4725b.c
index cc7a48c96..72549ee2e 100644
--- a/sound/soc/codecs/jz4725b.c
+++ b/sound/soc/codecs/jz4725b.c
@@ -142,8 +142,8 @@ struct jz_icdc {
 	struct clk *clk;
 };
 
-static const SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(jz4725b_dac_tlv, -2250, 0);
 static const SNDRV_CTL_TLVD_DECLARE_DB_LINEAR(jz4725b_line_tlv, -1500, 600);
+static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(jz4725b_dac_tlv, -2250, 150, 0);
 
 static const struct snd_kcontrol_new jz4725b_codec_controls[] = {
 	SOC_DOUBLE_TLV("Master Playback Volume",
-- 
2.36.1