This makes it a little easier to follow what is happening in debugfs. Additionally is also useful in facilitating work to add autodisable muxes because the control name is already used for the mux widget and thus shouldn't be reused for the autodisable widget.

Signed-off-by: Charles Keepax ckeepax@opensource.wolfsonmicro.com --- sound/soc/soc-dapm.c | 22 +++++++++++++++++++--- 1 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index beb48b6..e557018 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -308,11 +308,19 @@ static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget, { struct dapm_kcontrol_data *data; struct soc_mixer_control *mc; + const char *name; + int ret;

data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM;

+ name = kasprintf(GFP_KERNEL, "%s %s", kcontrol->id.name, "Autodisable"); + if (!name) { + ret = -ENOMEM; + goto err_data; + } + INIT_LIST_HEAD(&data->paths);

switch (widget->id) { @@ -334,15 +342,15 @@ static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget, template.off_val = 0; template.on_val = template.off_val; template.id = snd_soc_dapm_kcontrol; - template.name = kcontrol->id.name; + template.name = name;

data->value = template.on_val;

data->widget = snd_soc_dapm_new_control(widget->dapm, &template); if (!data->widget) { - kfree(data); - return -ENOMEM; + ret = -ENOMEM; + goto err_name; } } break; @@ -353,11 +361,19 @@ static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget, kcontrol->private_data = data;

return 0; + +err_name: + kfree(name); +err_data: + kfree(data); + return ret; }

static void dapm_kcontrol_free(struct snd_kcontrol *kctl) { struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl); + if (data->widget) + kfree(data->widget->name); kfree(data->wlist); kfree(data); }

Commit 57295073b6ac ("ASoC: dapm: Implement mixer input auto-disable") added support for autodisable controls, controls whose values are only written to the hardware when their respective widgets are powered up. But it only added support for controls based on the mixer abstraction.

This patch add support for mux controls (DAPM controls based on the enum abstraction) to be auto-disabled as well. As each mux can only have a single control, there is no need to tie the autodisable widget to the inputs (as is done for the mixer controls) it can be tided directly to the mux widget itself.

Note that it is assumed that the first entry in a autodisable mux control will always represent the off state for the mux and is what the mux will be set to whilst it is disabled.

Signed-off-by: Charles Keepax ckeepax@opensource.wolfsonmicro.com --- include/sound/soc.h | 10 ++++++++ sound/soc/soc-dapm.c | 62 +++++++++++++++++++++++++++++++++++++------------ 2 files changed, 57 insertions(+), 15 deletions(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h index 45cfd69..28b8ae6 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -192,6 +192,10 @@ .mask = xmask, .items = xitems, .texts = xtexts, .values = xvalues} #define SOC_VALUE_ENUM_SINGLE(xreg, xshift, xmask, xitems, xtexts, xvalues) \ SOC_VALUE_ENUM_DOUBLE(xreg, xshift, xshift, xmask, xitems, xtexts, xvalues) +#define SOC_VALUE_ENUM_SINGLE_AUTODISABLE(xreg, xshift, xmask, xitems, xtexts, xvalues) \ +{ .reg = xreg, .shift_l = xshift, .shift_r = xshift, \ + .mask = xmask, .items = xitems, .texts = xtexts, \ + .values = xvalues, .autodisable = 1} #define SOC_ENUM_SINGLE_VIRT(xitems, xtexts) \ SOC_ENUM_SINGLE(SND_SOC_NOPM, 0, xitems, xtexts) #define SOC_ENUM(xname, xenum) \ @@ -312,6 +316,11 @@ ARRAY_SIZE(xtexts), xtexts, xvalues) #define SOC_VALUE_ENUM_SINGLE_DECL(name, xreg, xshift, xmask, xtexts, xvalues) \ SOC_VALUE_ENUM_DOUBLE_DECL(name, xreg, xshift, xshift, xmask, xtexts, xvalues) + +#define SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(name, xreg, xshift, xmask, xtexts, xvalues) \ + const struct soc_enum name = SOC_VALUE_ENUM_SINGLE_AUTODISABLE(xreg, \ + xshift, xmask, ARRAY_SIZE(xtexts), xtexts, xvalues) + #define SOC_ENUM_SINGLE_VIRT_DECL(name, xtexts) \ const struct soc_enum name = SOC_ENUM_SINGLE_VIRT(ARRAY_SIZE(xtexts), xtexts)

@@ -1200,6 +1209,7 @@ struct soc_enum { unsigned int mask; const char * const *texts; const unsigned int *values; + unsigned int autodisable:1; };

/** diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index e557018..1c53ba3 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -308,6 +308,7 @@ static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget, { struct dapm_kcontrol_data *data; struct soc_mixer_control *mc; + struct soc_enum *e; const char *name; int ret;

@@ -354,6 +355,34 @@ static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget, } } break; + case snd_soc_dapm_mux: + e = (struct soc_enum *)kcontrol->private_value; + + if (e->autodisable) { + struct snd_soc_dapm_widget template; + + memset(&template, 0, sizeof(template)); + template.reg = e->reg; + template.mask = e->mask << e->shift_l; + template.shift = e->shift_l; + template.off_val = e->values[0]; + template.on_val = template.off_val; + template.id = snd_soc_dapm_kcontrol; + template.name = name; + + data->value = template.on_val; + + data->widget = snd_soc_dapm_new_control(widget->dapm, + &template); + if (!data->widget) { + ret = -ENOMEM; + goto err_name; + } + + snd_soc_dapm_add_path(widget->dapm, data->widget, + widget, NULL, NULL); + } + break; default: break; } @@ -417,11 +446,6 @@ static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol, struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);

list_add_tail(&path->list_kcontrol, &data->paths); - - if (data->widget) { - snd_soc_dapm_add_path(data->widget->dapm, data->widget, - path->source, NULL, NULL); - } }

static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol) @@ -819,6 +843,7 @@ static int dapm_new_mixer(struct snd_soc_dapm_widget *w) { int i, ret; struct snd_soc_dapm_path *path; + struct dapm_kcontrol_data *data;

/* add kcontrol */ for (i = 0; i < w->num_kcontrols; i++) { @@ -828,16 +853,20 @@ static int dapm_new_mixer(struct snd_soc_dapm_widget *w) if (path->name != (char *)w->kcontrol_news[i].name) continue;

- if (w->kcontrols[i]) { - dapm_kcontrol_add_path(w->kcontrols[i], path); - continue; + if (!w->kcontrols[i]) { + ret = dapm_create_or_share_mixmux_kcontrol(w, i); + if (ret < 0) + return ret; }

- ret = dapm_create_or_share_mixmux_kcontrol(w, i); - if (ret < 0) - return ret; - dapm_kcontrol_add_path(w->kcontrols[i], path); + + data = snd_kcontrol_chip(w->kcontrols[i]); + if (data->widget) + snd_soc_dapm_add_path(data->widget->dapm, + data->widget, + path->source, + NULL, NULL); } }

@@ -2944,16 +2973,19 @@ int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol); + struct snd_soc_card *card = dapm->card; struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int reg_val, val;

- if (e->reg != SND_SOC_NOPM) { + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) { int ret = soc_dapm_read(dapm, e->reg, &reg_val); if (ret) return ret; } else { reg_val = dapm_kcontrol_get_value(kcontrol); } + mutex_unlock(&card->dapm_mutex);

val = (reg_val >> e->shift_l) & e->mask; ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val); @@ -3002,10 +3034,10 @@ int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,

mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);

+ change = dapm_kcontrol_set_value(kcontrol, val); + if (e->reg != SND_SOC_NOPM) change = soc_dapm_test_bits(dapm, e->reg, mask, val); - else - change = dapm_kcontrol_set_value(kcontrol, val);

if (change) { if (e->reg != SND_SOC_NOPM) {