--- /dev/null
+From 4a15efde52bb79bf44e63b998cd84f896404d728 Mon Sep 17 00:00:00 2001
+From: Dimitris Papavasiliou <dpapavas@gmail.com>
+Date: Sat, 24 Nov 2018 22:05:42 +0200
+Subject: [PATCH] ASoC: pcm512x: Implement the digital_mute interface
+
+[ Upstream commit 3500f1c589e92e0b6b1f8d31b4084fbde08d49cb ]
+
+Clicks and pops of various volumes can be produced while the device is
+opened, closed, put into and taken out of standby, or reconfigured.
+Fix this, by implementing the digital_mute interface, so that the
+output is muted during such operations.
+
+Signed-off-by: Dimitris Papavasiliou <dpapavas@gmail.com>
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ sound/soc/codecs/pcm512x.c | 121 ++++++++++++++++++++++++++++++++++++-
+ sound/soc/codecs/pcm512x.h | 2 +
+ 2 files changed, 121 insertions(+), 2 deletions(-)
+
+--- a/sound/soc/codecs/pcm512x.c
++++ b/sound/soc/codecs/pcm512x.c
+@@ -53,6 +53,8 @@ struct pcm512x_priv {
+ unsigned long overclock_pll;
+ unsigned long overclock_dac;
+ unsigned long overclock_dsp;
++ int mute;
++ struct mutex mutex;
+ int lrclk_div;
+ };
+
+@@ -385,6 +387,61 @@ static const struct soc_enum pcm512x_ved
+ SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDS_SHIFT, 4,
+ pcm512x_ramp_step_text);
+
++static int pcm512x_update_mute(struct pcm512x_priv *pcm512x)
++{
++ return regmap_update_bits(
++ pcm512x->regmap, PCM512x_MUTE, PCM512x_RQML | PCM512x_RQMR,
++ (!!(pcm512x->mute & 0x5) << PCM512x_RQML_SHIFT)
++ | (!!(pcm512x->mute & 0x3) << PCM512x_RQMR_SHIFT));
++}
++
++static int pcm512x_digital_playback_switch_get(struct snd_kcontrol *kcontrol,
++ struct snd_ctl_elem_value *ucontrol)
++{
++ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
++ struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
++
++ mutex_lock(&pcm512x->mutex);
++ ucontrol->value.integer.value[0] = !(pcm512x->mute & 0x4);
++ ucontrol->value.integer.value[1] = !(pcm512x->mute & 0x2);
++ mutex_unlock(&pcm512x->mutex);
++
++ return 0;
++}
++
++static int pcm512x_digital_playback_switch_put(struct snd_kcontrol *kcontrol,
++ struct snd_ctl_elem_value *ucontrol)
++{
++ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
++ struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
++ int ret, changed = 0;
++
++ mutex_lock(&pcm512x->mutex);
++
++ if ((pcm512x->mute & 0x4) == (ucontrol->value.integer.value[0] << 2)) {
++ pcm512x->mute ^= 0x4;
++ changed = 1;
++ }
++ if ((pcm512x->mute & 0x2) == (ucontrol->value.integer.value[1] << 1)) {
++ pcm512x->mute ^= 0x2;
++ changed = 1;
++ }
++
++ if (changed) {
++ ret = pcm512x_update_mute(pcm512x);
++ if (ret != 0) {
++ dev_err(component->dev,
++ "Failed to update digital mute: %d\n", ret);
++ mutex_unlock(&pcm512x->mutex);
++ return ret;
++ }
++ }
++
++ mutex_unlock(&pcm512x->mutex);
++
++ return changed;
++}
++
+ static const struct snd_kcontrol_new pcm512x_controls[] = {
+ SOC_DOUBLE_R_TLV("Digital Playback Volume", PCM512x_DIGITAL_VOLUME_2,
+ PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, digital_tlv),
+@@ -392,8 +449,15 @@ SOC_DOUBLE_TLV("Analogue Playback Volume
+ PCM512x_LAGN_SHIFT, PCM512x_RAGN_SHIFT, 1, 1, analog_tlv),
+ SOC_DOUBLE_TLV("Analogue Playback Boost Volume", PCM512x_ANALOG_GAIN_BOOST,
+ PCM512x_AGBL_SHIFT, PCM512x_AGBR_SHIFT, 1, 0, boost_tlv),
+-SOC_DOUBLE("Digital Playback Switch", PCM512x_MUTE, PCM512x_RQML_SHIFT,
+- PCM512x_RQMR_SHIFT, 1, 1),
++{
++ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
++ .name = "Digital Playback Switch",
++ .index = 0,
++ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
++ .info = snd_ctl_boolean_stereo_info,
++ .get = pcm512x_digital_playback_switch_get,
++ .put = pcm512x_digital_playback_switch_put
++},
+
+ SOC_SINGLE("Deemphasis Switch", PCM512x_DSP, PCM512x_DEMP_SHIFT, 1, 1),
+ SOC_ENUM("DSP Program", pcm512x_dsp_program),
+@@ -1323,6 +1387,56 @@ static int pcm512x_set_fmt(struct snd_so
+ return 0;
+ }
+
++static int pcm512x_digital_mute(struct snd_soc_dai *dai, int mute)
++{
++ struct snd_soc_component *component = dai->component;
++ struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component);
++ int ret;
++ unsigned int mute_det;
++
++ mutex_lock(&pcm512x->mutex);
++
++ if (mute) {
++ pcm512x->mute |= 0x1;
++ ret = regmap_update_bits(pcm512x->regmap, PCM512x_MUTE,
++ PCM512x_RQML | PCM512x_RQMR,
++ PCM512x_RQML | PCM512x_RQMR);
++ if (ret != 0) {
++ dev_err(component->dev,
++ "Failed to set digital mute: %d\n", ret);
++ mutex_unlock(&pcm512x->mutex);
++ return ret;
++ }
++
++ regmap_read_poll_timeout(pcm512x->regmap,
++ PCM512x_ANALOG_MUTE_DET,
++ mute_det, (mute_det & 0x3) == 0,
++ 200, 10000);
++
++ mutex_unlock(&pcm512x->mutex);
++ } else {
++ pcm512x->mute &= ~0x1;
++ ret = pcm512x_update_mute(pcm512x);
++ if (ret != 0) {
++ dev_err(component->dev,
++ "Failed to update digital mute: %d\n", ret);
++ mutex_unlock(&pcm512x->mutex);
++ return ret;
++ }
++
++ regmap_read_poll_timeout(pcm512x->regmap,
++ PCM512x_ANALOG_MUTE_DET,
++ mute_det,
++ (mute_det & 0x3)
++ == ((~pcm512x->mute >> 1) & 0x3),
++ 200, 10000);
++ }
++
++ mutex_unlock(&pcm512x->mutex);
++
++ return 0;
++}
++
+ static int pcm512x_set_tdm_slot(struct snd_soc_dai *dai,
+ unsigned int tx_mask, unsigned int rx_mask,
+ int slots, int width)
+@@ -1348,6 +1462,7 @@ static const struct snd_soc_dai_ops pcm5
+ .startup = pcm512x_dai_startup,
+ .hw_params = pcm512x_hw_params,
+ .set_fmt = pcm512x_set_fmt,
++ .digital_mute = pcm512x_digital_mute,
+ .set_tdm_slot = pcm512x_set_tdm_slot,
+ };
+
+@@ -1414,6 +1529,8 @@ int pcm512x_probe(struct device *dev, st
+ if (!pcm512x)
+ return -ENOMEM;
+
++ mutex_init(&pcm512x->mutex);
++
+ dev_set_drvdata(dev, pcm512x);
+ pcm512x->regmap = regmap;
+
+--- a/sound/soc/codecs/pcm512x.h
++++ b/sound/soc/codecs/pcm512x.h
+@@ -112,7 +112,9 @@
+ #define PCM512x_RQST_SHIFT 4
+
+ /* Page 0, Register 3 - mute */
++#define PCM512x_RQMR (1 << 0)
+ #define PCM512x_RQMR_SHIFT 0
++#define PCM512x_RQML (1 << 4)
+ #define PCM512x_RQML_SHIFT 4
+
+ /* Page 0, Register 4 - PLL */
projects / openwrt / openwrt.git / blobdiff