linux-kernel - [PATCH 4/4] ASoC: tas2764: Fix amp gain register offset & default

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Date:   Thu, 30 Jun 2022 09:51:35 +0200
From:   Martin Povišer <povik+lin@...ebit.org>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Hector Martin <marcan@...can.st>, Stephen Kitt <steve@....org>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Dan Murphy <dmurphy@...com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, asahi@...ts.linux.dev,
        Martin Povišer <povik+lin@...ebit.org>
Subject: [PATCH 4/4] ASoC: tas2764: Fix amp gain register offset & default

From: Hector Martin <marcan@...can.st>

The register default is 0x28 per the datasheet, and the amp gain field
is supposed to be shifted left by one. With the wrong default, the ALSA
controls lie about the power-up state. With the wrong shift, we get only
half the gain we expect.

Signed-off-by: Hector Martin <marcan@...can.st>
Fixes: 827ed8a0fa50 ("ASoC: tas2764: Add the driver for the TAS2764")
Signed-off-by: Martin Povišer <povik+lin@...ebit.org>
---
 sound/soc/codecs/tas2764.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/tas2764.c b/sound/soc/codecs/tas2764.c
index 55da1b3440e1..846d9d3ecc9d 100644
--- a/sound/soc/codecs/tas2764.c
+++ b/sound/soc/codecs/tas2764.c
@@ -541,7 +541,7 @@ static DECLARE_TLV_DB_SCALE(tas2764_playback_volume, -10050, 50, 1);
 static const struct snd_kcontrol_new tas2764_snd_controls[] = {
 	SOC_SINGLE_TLV("Speaker Volume", TAS2764_DVC, 0,
 		       TAS2764_DVC_MAX, 1, tas2764_playback_volume),
-	SOC_SINGLE_TLV("Amp Gain Volume", TAS2764_CHNL_0, 0, 0x14, 0,
+	SOC_SINGLE_TLV("Amp Gain Volume", TAS2764_CHNL_0, 1, 0x14, 0,
 		       tas2764_digital_tlv),
 };
 
@@ -565,7 +565,7 @@ static const struct reg_default tas2764_reg_defaults[] = {
 	{ TAS2764_SW_RST, 0x00 },
 	{ TAS2764_PWR_CTRL, 0x1a },
 	{ TAS2764_DVC, 0x00 },
-	{ TAS2764_CHNL_0, 0x00 },
+	{ TAS2764_CHNL_0, 0x28 },
 	{ TAS2764_TDM_CFG0, 0x09 },
 	{ TAS2764_TDM_CFG1, 0x02 },
 	{ TAS2764_TDM_CFG2, 0x0a },
-- 
2.33.0