linux-kernel - [PATCH v2 3/3] ALSA: hda: cs35l41: Enable Amp High Pass Filter

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Date:   Mon, 13 Feb 2023 14:50:08 +0000
From:   Stefan Binding <sbinding@...nsource.cirrus.com>
To:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <patches@...nsource.cirrus.com>,
        Stefan Binding <sbinding@...nsource.cirrus.com>
Subject: [PATCH v2 3/3] ALSA: hda: cs35l41: Enable Amp High Pass Filter

This helps smooth out pops and clicks in the amps.

Signed-off-by: Stefan Binding <sbinding@...nsource.cirrus.com>
---
 sound/pci/hda/cs35l41_hda.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c
index 1aad2604b9db..75020edd39e7 100644
--- a/sound/pci/hda/cs35l41_hda.c
+++ b/sound/pci/hda/cs35l41_hda.c
@@ -58,7 +58,7 @@ static const struct reg_sequence cs35l41_hda_config[] = {
 	{ CS35L41_DSP1_RX3_SRC,         0x00000018 }, // DSP1RX3 SRC = VMON
 	{ CS35L41_DSP1_RX4_SRC,         0x00000019 }, // DSP1RX4 SRC = IMON
 	{ CS35L41_DSP1_RX5_SRC,         0x00000020 }, // DSP1RX5 SRC = ERRVOL
-	{ CS35L41_AMP_DIG_VOL_CTRL,	0x00000000 }, // AMP_VOL_PCM  0.0 dB
+	{ CS35L41_AMP_DIG_VOL_CTRL,	0x00008000 }, // AMP_HPF_PCM_EN = 1, AMP_VOL_PCM  0.0 dB
 	{ CS35L41_AMP_GAIN_CTRL,	0x00000084 }, // AMP_GAIN_PCM 4.5 dB
 };
 
@@ -82,13 +82,13 @@ static const struct reg_sequence cs35l41_hda_config_dsp[] = {
 	{ CS35L41_DSP1_RX3_SRC,         0x00000018 }, // DSP1RX3 SRC = VMON
 	{ CS35L41_DSP1_RX4_SRC,         0x00000019 }, // DSP1RX4 SRC = IMON
 	{ CS35L41_DSP1_RX5_SRC,         0x00000029 }, // DSP1RX5 SRC = VBSTMON
-	{ CS35L41_AMP_DIG_VOL_CTRL,	0x00000000 }, // AMP_VOL_PCM  0.0 dB
+	{ CS35L41_AMP_DIG_VOL_CTRL,	0x00008000 }, // AMP_HPF_PCM_EN = 1, AMP_VOL_PCM  0.0 dB
 	{ CS35L41_AMP_GAIN_CTRL,	0x00000233 }, // AMP_GAIN_PCM = 17.5dB AMP_GAIN_PDM = 19.5dB
 };
 
 static const struct reg_sequence cs35l41_hda_mute[] = {
 	{ CS35L41_AMP_GAIN_CTRL,	0x00000000 }, // AMP_GAIN_PCM 0.5 dB
-	{ CS35L41_AMP_DIG_VOL_CTRL,	0x0000A678 }, // AMP_VOL_PCM Mute
+	{ CS35L41_AMP_DIG_VOL_CTRL,	0x0000A678 }, // AMP_HPF_PCM_EN = 1, AMP_VOL_PCM Mute
 };
 
 static void cs35l41_add_controls(struct cs35l41_hda *cs35l41)
-- 
2.34.1