linux-kernel - [PATCH] ASoC: codecs/jz4770: Add missing gain control after DAC/ADC mixer

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Date:   Thu, 25 Nov 2021 23:25:43 +0000
From:   Paul Cercueil <paul@...pouillou.net>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     linux-mips@...r.kernel.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, list@...ndingux.net,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH] ASoC: codecs/jz4770: Add missing gain control after DAC/ADC mixer

The capture and playback paths both have a configurable gain after their
respective mixer, which can be set from -31 dB to 0 dB in 32 steps.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 sound/soc/codecs/jz4770.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sound/soc/codecs/jz4770.c b/sound/soc/codecs/jz4770.c
index 6b60120f59a6..1d0c467ab57b 100644
--- a/sound/soc/codecs/jz4770.c
+++ b/sound/soc/codecs/jz4770.c
@@ -307,6 +307,7 @@ static const DECLARE_TLV_DB_MINMAX_MUTE(dac_tlv, -3100, 0);
 static const DECLARE_TLV_DB_SCALE(adc_tlv, 0, 100, 0);
 static const DECLARE_TLV_DB_MINMAX(out_tlv, -2500, 600);
 static const DECLARE_TLV_DB_SCALE(linein_tlv, -2500, 100, 0);
+static const DECLARE_TLV_DB_MINMAX(mixer_tlv, -3100, 0);
 
 /* Unconditional controls. */
 static const struct snd_kcontrol_new jz4770_codec_snd_controls[] = {
@@ -319,6 +320,14 @@ static const struct snd_kcontrol_new jz4770_codec_snd_controls[] = {
 	SOC_DOUBLE_R_TLV("Line In Bypass Playback Volume",
 			 JZ4770_CODEC_REG_GCR_LIBYL, JZ4770_CODEC_REG_GCR_LIBYR,
 			 REG_GCR_GAIN_OFFSET, REG_GCR_GAIN_MAX, 1, linein_tlv),
+
+	SOC_SINGLE_TLV("Mixer Capture Volume",
+		       JZ4770_CODEC_REG_GCR_MIXADC,
+		       REG_GCR_GAIN_OFFSET, REG_GCR_GAIN_MAX, 1, mixer_tlv),
+
+	SOC_SINGLE_TLV("Mixer Playback Volume",
+		       JZ4770_CODEC_REG_GCR_MIXDAC,
+		       REG_GCR_GAIN_OFFSET, REG_GCR_GAIN_MAX, 1, mixer_tlv),
 };
 
 static const struct snd_kcontrol_new jz4770_codec_pcm_playback_controls[] = {
-- 
2.33.0