[PATCH] ASoC: dapm: Add support for multi register mux

From: Arun Shamanna Lakshmi
Date: Wed Apr 02 2014 - 23:12:04 EST

- Modify soc_enum struct to handle pointers for reg and mask
- Add dapm get and put APIs for multi register mux with one hot encoding
- Update snd_soc_dapm_update struct to support multiple reg update

Signed-off-by: Arun Shamanna Lakshmi <aruns@xxxxxxxxxx>
Signed-off-by: Songhee Baek <sbaek@xxxxxxxxxx>
---
include/sound/soc-dapm.h | 17 ++++-
include/sound/soc.h | 34 +++++++--
sound/soc/soc-core.c | 12 ++--
sound/soc/soc-dapm.c | 174 +++++++++++++++++++++++++++++++++++++++-------
4 files changed, 197 insertions(+), 40 deletions(-)

diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index ef78f56..ded46732 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -305,6 +305,12 @@ struct device;
.get = snd_soc_dapm_get_enum_double, \
.put = snd_soc_dapm_put_enum_double, \
.private_value = (unsigned long)&xenum }
+#define SOC_DAPM_ENUM_ONEHOT(xname, xenum) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
+ .info = snd_soc_info_enum_double, \
+ .get = snd_soc_dapm_get_enum_onehot, \
+ .put = snd_soc_dapm_put_enum_onehot, \
+ .private_value = (unsigned long)&xenum }
#define SOC_DAPM_ENUM_VIRT(xname, xenum) \
SOC_DAPM_ENUM(xname, xenum)
#define SOC_DAPM_ENUM_EXT(xname, xenum, xget, xput) \
@@ -378,6 +384,10 @@ int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
+int snd_soc_dapm_get_enum_onehot(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol);
+int snd_soc_dapm_put_enum_onehot(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol);
int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo);
int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
@@ -590,9 +600,10 @@ struct snd_soc_dapm_widget {

struct snd_soc_dapm_update {
struct snd_kcontrol *kcontrol;
- int reg;
- int mask;
- int val;
+ int reg[3];
+ int mask[3];
+ int val[3];
+ int num_regs;
};

/* DAPM context */
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 0b83168..add326a 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -177,18 +177,24 @@
{.reg = xreg, .min = xmin, .max = xmax, \
.platform_max = xmax} }
#define SOC_ENUM_DOUBLE(xreg, xshift_l, xshift_r, xitems, xtexts) \
-{ .reg = xreg, .shift_l = xshift_l, .shift_r = xshift_r, \
+{ .reg = &(int){(xreg)}, .shift_l = xshift_l, .shift_r = xshift_r, \
.items = xitems, .texts = xtexts, \
- .mask = xitems ? roundup_pow_of_two(xitems) - 1 : 0}
+ .mask = &(unsigned int){(xitems ? roundup_pow_of_two(xitems) - 1 : 0)}, \
+ .num_regs = 1, .type = SND_SOC_ENUM_NONE }
#define SOC_ENUM_SINGLE(xreg, xshift, xitems, xtexts) \
SOC_ENUM_DOUBLE(xreg, xshift, xshift, xitems, xtexts)
#define SOC_ENUM_SINGLE_EXT(xitems, xtexts) \
{ .items = xitems, .texts = xtexts }
#define SOC_VALUE_ENUM_DOUBLE(xreg, xshift_l, xshift_r, xmask, xitems, xtexts, xvalues) \
-{ .reg = xreg, .shift_l = xshift_l, .shift_r = xshift_r, \
- .mask = xmask, .items = xitems, .texts = xtexts, .values = xvalues}
+{ .reg = &(int){(xreg)}, .shift_l = xshift_l, .shift_r = xshift_r, \
+ .mask = &(unsigned int){(xmask)}, .items = xitems, .texts = xtexts, \
+ .values = xvalues, .num_regs = 1, .type = SND_SOC_ENUM_NONE }
#define SOC_VALUE_ENUM_SINGLE(xreg, xshift, xmask, xnitmes, xtexts, xvalues) \
SOC_VALUE_ENUM_DOUBLE(xreg, xshift, xshift, xmask, xnitmes, xtexts, xvalues)
+#define SOC_VALUE_ENUM_ONEHOT(xregs, xmasks, xnum_regs, xitems, xtexts, xvalues) \
+{ .reg = xregs, .mask = xmasks, .num_regs = xnum_regs, \
+ .items = xitems, .texts = xtexts, .values = xvalues, \
+ .type = SND_SOC_ENUM_ONEHOT }
#define SOC_ENUM_SINGLE_VIRT(xitems, xtexts) \
SOC_ENUM_SINGLE(SND_SOC_NOPM, 0, xitems, xtexts)
#define SOC_ENUM(xname, xenum) \
@@ -293,6 +299,9 @@
#define SOC_VALUE_ENUM_DOUBLE_DECL(name, xreg, xshift_l, xshift_r, xmask, xtexts, xvalues) \
const struct soc_enum name = SOC_VALUE_ENUM_DOUBLE(xreg, xshift_l, xshift_r, xmask, \
ARRAY_SIZE(xtexts), xtexts, xvalues)
+#define SOC_VALUE_ENUM_ONEHOT_DECL(name, xregs, xmasks, xnum_regs, xtexts, xvalues) \
+ const struct soc_enum name = SOC_VALUE_ENUM_ONEHOT(xregs, xmasks, xnum_regs, \
+ 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_ENUM_SINGLE_VIRT_DECL(name, xtexts) \
@@ -326,6 +335,17 @@ enum snd_soc_bias_level {
SND_SOC_BIAS_ON = 3,
};

+/*
+ * Soc Enum Type
+ *
+ * @NONE: soc_enum type for SINGLE, DOUBLE or VIRTUAL mux
+ * @ONEHOT: soc_enum type for one hot encoding mux
+ */
+enum snd_soc_enum_type {
+ SND_SOC_ENUM_NONE = 0,
+ SND_SOC_ENUM_ONEHOT = 1,
+};
+
struct device_node;
struct snd_jack;
struct snd_soc_card;
@@ -1098,13 +1118,15 @@ struct soc_mreg_control {

/* enumerated kcontrol */
struct soc_enum {
- int reg;
+ int *reg;
unsigned char shift_l;
unsigned char shift_r;
unsigned int items;
- unsigned int mask;
+ unsigned int *mask;
const char * const *texts;
const unsigned int *values;
+ enum snd_soc_enum_type type;
+ unsigned int num_regs;
};

/**
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index caebd63..cf29722 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2601,12 +2601,12 @@ int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
unsigned int val, item;
unsigned int reg_val;

- reg_val = snd_soc_read(codec, e->reg);
- val = (reg_val >> e->shift_l) & e->mask;
+ reg_val = snd_soc_read(codec, e->reg[0]);
+ val = (reg_val >> e->shift_l) & e->mask[0];
item = snd_soc_enum_val_to_item(e, val);
ucontrol->value.enumerated.item[0] = item;
if (e->shift_l != e->shift_r) {
- val = (reg_val >> e->shift_l) & e->mask;
+ val = (reg_val >> e->shift_l) & e->mask[0];
item = snd_soc_enum_val_to_item(e, val);
ucontrol->value.enumerated.item[1] = item;
}
@@ -2636,15 +2636,15 @@ int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
if (item[0] >= e->items)
return -EINVAL;
val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
- mask = e->mask << e->shift_l;
+ mask = e->mask[0] << e->shift_l;
if (e->shift_l != e->shift_r) {
if (item[1] >= e->items)
return -EINVAL;
val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
- mask |= e->mask << e->shift_r;
+ mask |= e->mask[0] << e->shift_r;
}

- return snd_soc_update_bits_locked(codec, e->reg, mask, val);
+ return snd_soc_update_bits_locked(codec, e->reg[0], mask, val);
}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index c8a780d..19b004a 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -511,13 +511,26 @@ static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
const struct snd_kcontrol_new *kcontrol)
{
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
- unsigned int val, item;
+ unsigned int val, item, bit_pos = -1;
int i;

- if (e->reg != SND_SOC_NOPM) {
- soc_widget_read(dest, e->reg, &val);
- val = (val >> e->shift_l) & e->mask;
- item = snd_soc_enum_val_to_item(e, val);
+ if (e->reg[0] != SND_SOC_NOPM) {
+ if (e->type == SND_SOC_ENUM_ONEHOT) {
+ for (i = 0; i < e->num_regs; i++) {
+ soc_widget_read(dest, e->reg[i], &val);
+ val = val & e->mask[i];
+ if (val != 0) {
+ bit_pos = __ffs(val) +
+ (8 * dest->codec->val_bytes * i);
+ break;
+ }
+ }
+ item = snd_soc_enum_val_to_item(e, bit_pos);
+ } else {
+ soc_widget_read(dest, e->reg[0], &val);
+ val = (val >> e->shift_l) & e->mask[0];
+ item = snd_soc_enum_val_to_item(e, val);
+ }
} else {
/* since a virtual mux has no backing registers to
* decide which path to connect, it will try to match
@@ -1553,8 +1566,8 @@ static void dapm_widget_update(struct snd_soc_card *card)
struct snd_soc_dapm_update *update = card->update;
struct snd_soc_dapm_widget_list *wlist;
struct snd_soc_dapm_widget *w = NULL;
- unsigned int wi;
- int ret;
+ unsigned int wi, i;
+ int ret = 0;

if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
return;
@@ -1575,8 +1588,12 @@ static void dapm_widget_update(struct snd_soc_card *card)
if (!w)
return;

- ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
- update->val);
+ /* dapm update for multiple registers */
+ for (i = 0; i < update->num_regs; i++) {
+ ret |= soc_widget_update_bits_locked(w, update->reg[i],
+ update->mask[i], update->val[i]);
+ }
+
if (ret < 0)
dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
w->name, ret);
@@ -2866,10 +2883,10 @@ int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
if (change) {
if (reg != SND_SOC_NOPM) {
update.kcontrol = kcontrol;
- update.reg = reg;
- update.mask = mask;
- update.val = val;
-
+ update.reg[0] = reg;
+ update.mask[0] = mask;
+ update.val[0] = val;
+ update.num_regs = 1;
card->update = &update;
}

@@ -2903,15 +2920,15 @@ int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
unsigned int reg_val, val;

- if (e->reg != SND_SOC_NOPM)
- reg_val = snd_soc_read(codec, e->reg);
+ if (e->reg[0] != SND_SOC_NOPM)
+ reg_val = snd_soc_read(codec, e->reg[0]);
else
reg_val = dapm_kcontrol_get_value(kcontrol);

- val = (reg_val >> e->shift_l) & e->mask;
+ val = (reg_val >> e->shift_l) & e->mask[0];
ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
if (e->shift_l != e->shift_r) {
- val = (reg_val >> e->shift_r) & e->mask;
+ val = (reg_val >> e->shift_r) & e->mask[0];
val = snd_soc_enum_val_to_item(e, val);
ucontrol->value.enumerated.item[1] = val;
}
@@ -2945,27 +2962,28 @@ int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
return -EINVAL;

val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
- mask = e->mask << e->shift_l;
+ mask = e->mask[0] << e->shift_l;
if (e->shift_l != e->shift_r) {
if (item[1] > e->items)
return -EINVAL;
val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_l;
- mask |= e->mask << e->shift_r;
+ mask |= e->mask[0] << e->shift_r;
}

mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);

- if (e->reg != SND_SOC_NOPM)
- change = snd_soc_test_bits(codec, e->reg, mask, val);
+ if (e->reg[0] != SND_SOC_NOPM)
+ change = snd_soc_test_bits(codec, e->reg[0], mask, val);
else
change = dapm_kcontrol_set_value(kcontrol, val);

if (change) {
- if (e->reg != SND_SOC_NOPM) {
+ if (e->reg[0] != SND_SOC_NOPM) {
update.kcontrol = kcontrol;
- update.reg = e->reg;
- update.mask = mask;
- update.val = val;
+ update.reg[0] = e->reg[0];
+ update.mask[0] = mask;
+ update.val[0] = val;
+ update.num_regs = 1;
card->update = &update;
}

@@ -2984,6 +3002,112 @@ int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);

/**
+ * snd_soc_dapm_get_enum_onehot - dapm enumerated onehot mixer get callback
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to get the value of a dapm enumerated onehot encoded mixer control
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_get_enum_onehot(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
+ struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+ unsigned int reg_val, val, bit_pos = -1, reg_idx;
+
+ for (reg_idx = 0; reg_idx < e->num_regs; reg_idx++) {
+ reg_val = snd_soc_read(codec, e->reg[reg_idx]);
+ val = reg_val & e->mask[reg_idx];
+ if (val != 0) {
+ bit_pos = __ffs(val) + (8 * codec->val_bytes * reg_idx);
+ break;
+ }
+ }
+
+ ucontrol->value.enumerated.item[0] =
+ snd_soc_enum_val_to_item(e, bit_pos);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_onehot);
+
+/**
+ * snd_soc_dapm_put_enum_onehot - dapm enumerated onehot mixer put callback
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to put the value of a dapm enumerated onehot encoded mixer control
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_put_enum_onehot(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
+ struct snd_soc_card *card = codec->card;
+ struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+ unsigned int *item = ucontrol->value.enumerated.item;
+ unsigned int change = 0, reg_idx = 0, value, bit_pos;
+ struct snd_soc_dapm_update update;
+ int ret = 0, reg_val = 0, i, update_idx = 0;
+
+ if (item[0] >= e->items)
+ return -EINVAL;
+
+ value = snd_soc_enum_item_to_val(e, item[0]);
+
+ if (value >= 0) {
+ /* get the register index and value to set */
+ reg_idx = value / (8 * codec->val_bytes);
+ bit_pos = value % (8 * codec->val_bytes);
+ reg_val = BIT(bit_pos);
+ }
+
+ for (i = 0; i < e->num_regs; i++) {
+ if (i == reg_idx) {
+ change = snd_soc_test_bits(codec, e->reg[i],
+ e->mask[i], reg_val);
+ /* set the selected register */
+ update.reg[e->num_regs - 1] = e->reg[reg_idx];
+ update.mask[e->num_regs - 1] = e->mask[reg_idx];
+ update.val[e->num_regs - 1] = reg_val;
+ } else {
+ /* accumulate the change to update the DAPM path
+ when none is selected */
+ change |= snd_soc_test_bits(codec, e->reg[i],
+ e->mask[i], 0);
+
+ /* clear the register when not selected */
+ update.reg[update_idx] = e->reg[i];
+ update.mask[update_idx] = e->mask[i];
+ update.val[update_idx++] = 0;
+ }
+ }
+
+ mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+
+ if (change) {
+ update.kcontrol = kcontrol;
+ update.num_regs = 3;
+ card->update = &update;
+
+ ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
+
+ card->update = NULL;
+ }
+
+ mutex_unlock(&card->dapm_mutex);
+
+ if (ret > 0)
+ soc_dpcm_runtime_update(card);
+
+ return change;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_onehot);
+
+/**
* snd_soc_dapm_info_pin_switch - Info for a pin switch
*
* @kcontrol: mixer control
--
1.7.9.5

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