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56 lines
2.0 KiB
56 lines
2.0 KiB
From 23744308d6343449e4a037d6bf35d9566c711983 Mon Sep 17 00:00:00 2001
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From: Gordon Garrity <gordon@iqaudio.com>
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Date: Sun, 30 Mar 2014 13:52:33 +0100
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Subject: [PATCH 188/196] fix soc-core's inverse range and let IQaudIO DAC use
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this fixed SOC_DOUBLE_R_RANGE_TLV support
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---
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sound/soc/codecs/pcm512x.c | 3 ++-
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sound/soc/soc-core.c | 8 ++++----
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2 files changed, 6 insertions(+), 5 deletions(-)
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diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c
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index 5bc96ec..504da38 100644
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--- a/sound/soc/codecs/pcm512x.c
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+++ b/sound/soc/codecs/pcm512x.c
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@@ -239,9 +239,10 @@ static const struct soc_enum pcm512x_veds =
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SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDS_SHIFT, 4,
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pcm512x_ramp_step_text);
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+/* Don't let the DAC go into clipping by limiting the alsa volume control range */
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static const struct snd_kcontrol_new pcm512x_controls[] = {
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SOC_DOUBLE_R_RANGE_TLV("Playback Digital Volume", PCM512x_DIGITAL_VOLUME_2,
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- PCM512x_DIGITAL_VOLUME_3, 0, 48, 255, 1, digital_tlv),
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+ PCM512x_DIGITAL_VOLUME_3, 0, 40, 255, 1, digital_tlv),
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SOC_DOUBLE("Playback Digital Switch", PCM512x_MUTE, PCM512x_RQML_SHIFT,
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PCM512x_RQMR_SHIFT, 1, 1),
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diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
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index be302e1..2c28df1 100644
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--- a/sound/soc/soc-core.c
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+++ b/sound/soc/soc-core.c
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@@ -2959,8 +2959,8 @@ int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
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if (invert)
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val = ((max - ucontrol->value.integer.value[0] + min) & mask);
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- else
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- val = (ucontrol->value.integer.value[0] & mask);
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+ else
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+ val = (ucontrol->value.integer.value[0] & mask);
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val_mask = mask << shift;
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val = val << shift;
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@@ -2971,8 +2971,8 @@ int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
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if (snd_soc_volsw_is_stereo(mc)) {
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if (invert)
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val = ((max - ucontrol->value.integer.value[1] + min) & mask);
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- else
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- val = (ucontrol->value.integer.value[1] & mask);
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+ else
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+ val = (ucontrol->value.integer.value[1] & mask);
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val_mask = mask << shift;
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val = val << shift;
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--
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1.9.1
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