linux-kernel - [PATCH] ASoC: rt5677: use more of the volume range from DACs

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Message-Id: <20181220232555.90030-1-zwisler@google.com>
Date:   Thu, 20 Dec 2018 16:25:55 -0700
From:   Ross Zwisler <zwisler@...gle.com>
To:     linux-kernel@...r.kernel.org
Cc:     Dylan Reid <dgreid@...omium.org>, Bard Liao <bardliao@...ltek.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Oder Chiou <oder_chiou@...ltek.com>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        Hsinyu Chao <hychao@...omium.org>,
        Ross Zwisler <zwisler@...gle.com>
Subject: [PATCH] ASoC: rt5677: use more of the volume range from DACs

From: Dylan Reid <dgreid@...omium.org>

The DACs volume can go over 0, both according to the data sheet and
real world testing.  The control can go up to +30dB.

This was tested by playing audio at full volume on a samus chromebook.

Signed-off-by: Dylan Reid <dgreid@...omium.org>
Reviewed-by: Hsinyu Chao <hychao@...omium.org>
Signed-off-by: Ross Zwisler <zwisler@...gle.com>
---
 sound/soc/codecs/rt5677.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index 9b7a1833d3316..513fec86301e8 100644
--- a/sound/soc/codecs/rt5677.c
+++ b/sound/soc/codecs/rt5677.c
@@ -832,13 +832,13 @@ static const struct snd_kcontrol_new rt5677_snd_controls[] = {
 
 	/* DAC Digital Volume */
 	SOC_DOUBLE_TLV("DAC1 Playback Volume", RT5677_DAC1_DIG_VOL,
-		RT5677_L_VOL_SFT, RT5677_R_VOL_SFT, 87, 0, dac_vol_tlv),
+		RT5677_L_VOL_SFT, RT5677_R_VOL_SFT, 127, 0, dac_vol_tlv),
 	SOC_DOUBLE_TLV("DAC2 Playback Volume", RT5677_DAC2_DIG_VOL,
-		RT5677_L_VOL_SFT, RT5677_R_VOL_SFT, 87, 0, dac_vol_tlv),
+		RT5677_L_VOL_SFT, RT5677_R_VOL_SFT, 127, 0, dac_vol_tlv),
 	SOC_DOUBLE_TLV("DAC3 Playback Volume", RT5677_DAC3_DIG_VOL,
-		RT5677_L_VOL_SFT, RT5677_R_VOL_SFT, 87, 0, dac_vol_tlv),
+		RT5677_L_VOL_SFT, RT5677_R_VOL_SFT, 127, 0, dac_vol_tlv),
 	SOC_DOUBLE_TLV("DAC4 Playback Volume", RT5677_DAC4_DIG_VOL,
-		RT5677_L_VOL_SFT, RT5677_R_VOL_SFT, 87, 0, dac_vol_tlv),
+		RT5677_L_VOL_SFT, RT5677_R_VOL_SFT, 127, 0, dac_vol_tlv),
 
 	/* IN1/IN2 Control */
 	SOC_SINGLE_TLV("IN1 Boost", RT5677_IN1, RT5677_BST_SFT1, 8, 0, bst_tlv),
-- 
2.20.1.415.g653613c723-goog