From 97404f2e0386ac147cec00fc5d89ea475b04bd78 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 14 Dec 2010 16:13:57 +0000 Subject: [PATCH] ASoC: Do DAPM control updates in the middle of DAPM sequences Attempt to minimise audible effects from mixer and mux updates by implementing the actual register changes between powering down widgets that have become unused and powering up widgets that are newly used. This means that we're making the change with the minimum set of widgets powered, that the input path is connected when we're powering up widgets (so things like DC offset correction can run with their signal active) and that we bring things down to cold before switching away. Since hardware tends to be designed for the power on/off case more than for dynamic reconfiguration this should minimise pops and clicks during reconfiguration while active. Signed-off-by: Mark Brown Acked-by: Peter Ujfalusi Tested-by: Peter Ujfalusi Acked-by: Liam Girdwood --- include/sound/soc-dapm.h | 10 +++ sound/soc/soc-dapm.c | 134 +++++++++++++++++++++------------------ 2 files changed, 84 insertions(+), 60 deletions(-) diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h index 98783510d2f1..540872fc1390 100644 --- a/include/sound/soc-dapm.h +++ b/include/sound/soc-dapm.h @@ -460,6 +460,14 @@ struct snd_soc_dapm_widget { struct list_head power_list; }; +struct snd_soc_dapm_update { + struct snd_soc_dapm_widget *widget; + struct snd_kcontrol *kcontrol; + int reg; + int mask; + int val; +}; + /* DAPM context */ struct snd_soc_dapm_context { int n_widgets; /* number of widgets in this context */ @@ -468,6 +476,8 @@ struct snd_soc_dapm_context { struct delayed_work delayed_work; unsigned int idle_bias_off:1; /* Use BIAS_OFF instead of STANDBY */ + struct snd_soc_dapm_update *update; + struct device *dev; /* from parent - for debug */ struct snd_soc_codec *codec; /* parent codec */ struct snd_soc_card *card; /* parent card */ diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index f362d1de78f3..1debc3b05665 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -920,6 +920,41 @@ static void dapm_seq_run(struct snd_soc_dapm_context *dapm, dapm_seq_run_coalesced(dapm, &pending); } +static void dapm_widget_update(struct snd_soc_dapm_context *dapm) +{ + struct snd_soc_dapm_update *update = dapm->update; + struct snd_soc_dapm_widget *w; + int ret; + + if (!update) + return; + + w = update->widget; + + if (w->event && + (w->event_flags & SND_SOC_DAPM_PRE_REG)) { + ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG); + if (ret != 0) + pr_err("%s DAPM pre-event failed: %d\n", + w->name, ret); + } + + ret = snd_soc_update_bits(w->codec, update->reg, update->mask, + update->val); + if (ret < 0) + pr_err("%s DAPM update failed: %d\n", w->name, ret); + + if (w->event && + (w->event_flags & SND_SOC_DAPM_POST_REG)) { + ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG); + if (ret != 0) + pr_err("%s DAPM post-event failed: %d\n", + w->name, ret); + } +} + + + /* * Scan each dapm widget for complete audio path. * A complete path is a route that has valid endpoints i.e.:- @@ -1037,6 +1072,8 @@ static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event) /* Power down widgets first; try to avoid amplifying pops. */ dapm_seq_run(dapm, &down_list, event, dapm_down_seq); + dapm_widget_update(dapm); + /* Now power up. */ dapm_seq_run(dapm, &up_list, event, dapm_up_seq); @@ -1683,13 +1720,12 @@ int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol, (struct soc_mixer_control *)kcontrol->private_value; unsigned int reg = mc->reg; unsigned int shift = mc->shift; - unsigned int rshift = mc->rshift; int max = mc->max; unsigned int mask = (1 << fls(max)) - 1; unsigned int invert = mc->invert; - unsigned int val, val2, val_mask; - int connect; - int ret; + unsigned int val, val_mask; + int connect, change; + struct snd_soc_dapm_update update; val = (ucontrol->value.integer.value[0] & mask); @@ -1697,18 +1733,12 @@ int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol, val = max - val; val_mask = mask << shift; val = val << shift; - if (shift != rshift) { - val2 = (ucontrol->value.integer.value[1] & mask); - if (invert) - val2 = max - val2; - val_mask |= mask << rshift; - val |= val2 << rshift; - } mutex_lock(&widget->codec->mutex); widget->value = val; - if (snd_soc_test_bits(widget->codec, reg, val_mask, val)) { + change = snd_soc_test_bits(widget->codec, reg, val_mask, val); + if (change) { if (val) /* new connection */ connect = invert ? 0:1; @@ -1716,28 +1746,20 @@ int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol, /* old connection must be powered down */ connect = invert ? 1:0; + update.kcontrol = kcontrol; + update.widget = widget; + update.reg = reg; + update.mask = mask; + update.val = val; + widget->dapm->update = &update; + dapm_mixer_update_power(widget, kcontrol, connect); + + widget->dapm->update = NULL; } - if (widget->event) { - if (widget->event_flags & SND_SOC_DAPM_PRE_REG) { - ret = widget->event(widget, kcontrol, - SND_SOC_DAPM_PRE_REG); - if (ret < 0) { - ret = 1; - goto out; - } - } - ret = snd_soc_update_bits(widget->codec, reg, val_mask, val); - if (widget->event_flags & SND_SOC_DAPM_POST_REG) - ret = widget->event(widget, kcontrol, - SND_SOC_DAPM_POST_REG); - } else - ret = snd_soc_update_bits(widget->codec, reg, val_mask, val); - -out: mutex_unlock(&widget->codec->mutex); - return ret; + return 0; } EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw); @@ -1785,7 +1807,7 @@ int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol, struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int val, mux, change; unsigned int mask, bitmask; - int ret = 0; + struct snd_soc_dapm_update update; for (bitmask = 1; bitmask < e->max; bitmask <<= 1) ; @@ -1804,24 +1826,20 @@ int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol, mutex_lock(&widget->codec->mutex); widget->value = val; change = snd_soc_test_bits(widget->codec, e->reg, mask, val); + + update.kcontrol = kcontrol; + update.widget = widget; + update.reg = e->reg; + update.mask = mask; + update.val = val; + widget->dapm->update = &update; + dapm_mux_update_power(widget, kcontrol, change, mux, e); - if (widget->event_flags & SND_SOC_DAPM_PRE_REG) { - ret = widget->event(widget, - kcontrol, SND_SOC_DAPM_PRE_REG); - if (ret < 0) - goto out; - } + widget->dapm->update = NULL; - ret = snd_soc_update_bits(widget->codec, e->reg, mask, val); - - if (widget->event_flags & SND_SOC_DAPM_POST_REG) - ret = widget->event(widget, - kcontrol, SND_SOC_DAPM_POST_REG); - -out: mutex_unlock(&widget->codec->mutex); - return ret; + return change; } EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double); @@ -1933,7 +1951,7 @@ int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol, struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int val, mux, change; unsigned int mask; - int ret = 0; + struct snd_soc_dapm_update update; if (ucontrol->value.enumerated.item[0] > e->max - 1) return -EINVAL; @@ -1950,24 +1968,20 @@ int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol, mutex_lock(&widget->codec->mutex); widget->value = val; change = snd_soc_test_bits(widget->codec, e->reg, mask, val); + + update.kcontrol = kcontrol; + update.widget = widget; + update.reg = e->reg; + update.mask = mask; + update.val = val; + widget->dapm->update = &update; + dapm_mux_update_power(widget, kcontrol, change, mux, e); - if (widget->event_flags & SND_SOC_DAPM_PRE_REG) { - ret = widget->event(widget, - kcontrol, SND_SOC_DAPM_PRE_REG); - if (ret < 0) - goto out; - } + widget->dapm->update = NULL; - ret = snd_soc_update_bits(widget->codec, e->reg, mask, val); - - if (widget->event_flags & SND_SOC_DAPM_POST_REG) - ret = widget->event(widget, - kcontrol, SND_SOC_DAPM_POST_REG); - -out: mutex_unlock(&widget->codec->mutex); - return ret; + return change; } EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);