Currently, both the ALSA control for "Digital Master Playback Switch" and the ALSA core (by calling dai_ops->mute_stream()) control the same bits in the CS4271_VOL[AB]_MUTE registers.

That's a problem for applications which intentionally want to keep the flag switched off from userspace, even though the stream is already playing.

Fix this by keeping track of the states on both sides - the ALSA control and the ASoC core - and actually mute the Codec if either one of the two flags is set.

Signed-off-by: Daniel Mack zonque@gmail.com Reported-by: Michael Hirsch m.hirsch@raumfeld.com --- sound/soc/codecs/cs4271.c | 74 +++++++++++++++++++++++++++++++++-------------- 1 file changed, 53 insertions(+), 21 deletions(-)

diff --git a/sound/soc/codecs/cs4271.c b/sound/soc/codecs/cs4271.c index 03036b3..3a2ab48 100644 --- a/sound/soc/codecs/cs4271.c +++ b/sound/soc/codecs/cs4271.c @@ -171,6 +171,9 @@ struct cs4271_private { int gpio_disable; /* enable soft reset workaround */ bool enable_soft_reset; + /* keep track of playback mute flags */ + bool mute_control; + bool digital_mute; };

/* @@ -281,6 +284,51 @@ static int cs4271_put_deemph(struct snd_kcontrol *kcontrol, return cs4271_set_deemph(codec); }

+static int cs4271_set_mute(struct snd_soc_codec *codec) +{ + struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); + int val_a = 0; + int val_b = 0; + int ret; + + if (cs4271->digital_mute || cs4271->mute_control) { + val_a = CS4271_VOLA_MUTE; + val_b = CS4271_VOLB_MUTE; + } + + ret = regmap_update_bits(cs4271->regmap, CS4271_VOLA, + CS4271_VOLA_MUTE, val_a); + if (ret < 0) + return ret; + + ret = regmap_update_bits(cs4271->regmap, CS4271_VOLB, + CS4271_VOLB_MUTE, val_b); + if (ret < 0) + return ret; + + return 0; +} + +static int cs4271_get_playback_switch(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); + + ucontrol->value.enumerated.item[0] = !cs4271->mute_control; + return 0; +} + +static int cs4271_put_playback_switch(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); + + cs4271->mute_control = !ucontrol->value.enumerated.item[0]; + return cs4271_set_mute(codec); +} + struct cs4271_clk_cfg { bool master; /* codec mode */ u8 speed_mode; /* codec speed mode: 1x, 2x, 4x */ @@ -392,28 +440,12 @@ static int cs4271_mute_stream(struct snd_soc_dai *dai, int mute, int stream) { struct snd_soc_codec *codec = dai->codec; struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); - int ret; - int val_a = 0; - int val_b = 0;

- if (stream != SNDRV_PCM_STREAM_PLAYBACK) - return 0; - - if (mute) { - val_a = CS4271_VOLA_MUTE; - val_b = CS4271_VOLB_MUTE; + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + cs4271->digital_mute = mute; + return cs4271_set_mute(codec); }

- ret = regmap_update_bits(cs4271->regmap, CS4271_VOLA, - CS4271_VOLA_MUTE, val_a); - if (ret < 0) - return ret; - - ret = regmap_update_bits(cs4271->regmap, CS4271_VOLB, - CS4271_VOLB_MUTE, val_b); - if (ret < 0) - return ret; - return 0; }

@@ -437,8 +469,8 @@ static const struct snd_kcontrol_new cs4271_snd_controls[] = { SOC_DOUBLE("Master Capture Switch", CS4271_ADCCTL, 3, 2, 1, 1), SOC_SINGLE("Dither 16-Bit Data Switch", CS4271_ADCCTL, 5, 1, 0), SOC_DOUBLE("High Pass Filter Switch", CS4271_ADCCTL, 1, 0, 1, 1), - SOC_DOUBLE_R("Master Playback Switch", CS4271_VOLA, CS4271_VOLB, - 7, 1, 1), + SOC_SINGLE_BOOL_EXT("Master Playback Switch", 0, + cs4271_get_playback_switch, cs4271_put_playback_switch), };

static const struct snd_soc_dai_ops cs4271_dai_ops = {