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ASoC: es8316: Add jack-detect support 

Adding jack-detect support may seem weird for a codec with only
a single output, but it is necessary. The ES8316 appnote showing
the intended usage uses a jack-receptacle which physically disconnects
the speakers from the output when a jack is plugged in.

But all 3 devices using the es8316 which I have (2 Cherry Trail
devices and one Bay Trail CR device), use an analog mux to disconnect
the speakers, driven by a GPIO. In order to enable/disable the speakers
at the right time, we need jack-detect.

The same goes for the microphone where we must correctly set the mux
for the single ADC to either the internal or the headset microphone.

All devices I have support the es8316's builtin jack-detect functionality.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Hans de Goede 2019-01-03 14:45:26 +01:00 committed by Mark Brown
parent e1de3d237b
commit 8222576610
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 198 additions and 4 deletions
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195
sound/soc/codecs/es8316.c
View File

@ -15,12 +15,14 @@
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/mutex.h>
#include <linux/regmap.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>
#include <sound/jack.h>
#include "es8316.h"
/* In slave mode at single speed, the codec is documented as accepting 5
@ -33,6 +35,11 @@ static const unsigned int supported_mclk_lrck_ratios[] = {
};
struct es8316_priv {
struct mutex lock;
struct regmap *regmap;
struct snd_soc_component *component;
struct snd_soc_jack *jack;
int irq;
unsigned int sysclk;
unsigned int allowed_rates[NR_SUPPORTED_MCLK_LRCK_RATIOS];
struct snd_pcm_hw_constraint_list sysclk_constraints;
@ -529,8 +536,162 @@ static struct snd_soc_dai_driver es8316_dai = {
.symmetric_rates = 1,
};
static void es8316_enable_micbias_for_mic_gnd_short_detect(
struct snd_soc_component *component)
{
struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
snd_soc_dapm_mutex_lock(dapm);
snd_soc_dapm_force_enable_pin_unlocked(dapm, "Bias");
snd_soc_dapm_force_enable_pin_unlocked(dapm, "Analog power");
snd_soc_dapm_force_enable_pin_unlocked(dapm, "Mic Bias");
snd_soc_dapm_sync_unlocked(dapm);
snd_soc_dapm_mutex_unlock(dapm);
msleep(20);
}
static void es8316_disable_micbias_for_mic_gnd_short_detect(
struct snd_soc_component *component)
{
struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
snd_soc_dapm_mutex_lock(dapm);
snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Bias");
snd_soc_dapm_disable_pin_unlocked(dapm, "Analog power");
snd_soc_dapm_disable_pin_unlocked(dapm, "Bias");
snd_soc_dapm_sync_unlocked(dapm);
snd_soc_dapm_mutex_unlock(dapm);
}
static irqreturn_t es8316_irq(int irq, void *data)
{
struct es8316_priv *es8316 = data;
struct snd_soc_component *comp = es8316->component;
unsigned int flags;
mutex_lock(&es8316->lock);
regmap_read(es8316->regmap, ES8316_GPIO_FLAG, &flags);
if (flags == 0x00)
goto out; /* Powered-down / reset */
/* Catch spurious IRQ before set_jack is called */
if (!es8316->jack)
goto out;
dev_dbg(comp->dev, "gpio flags %#04x\n", flags);
if (flags & ES8316_GPIO_FLAG_HP_NOT_INSERTED) {
/* Jack removed, or spurious IRQ? */
if (es8316->jack->status & SND_JACK_MICROPHONE)
es8316_disable_micbias_for_mic_gnd_short_detect(comp);
if (es8316->jack->status & SND_JACK_HEADPHONE) {
snd_soc_jack_report(es8316->jack, 0,
SND_JACK_HEADSET | SND_JACK_BTN_0);
dev_dbg(comp->dev, "jack unplugged\n");
}
} else if (!(es8316->jack->status & SND_JACK_HEADPHONE)) {
/* Jack inserted, determine type */
es8316_enable_micbias_for_mic_gnd_short_detect(comp);
regmap_read(es8316->regmap, ES8316_GPIO_FLAG, &flags);
dev_dbg(comp->dev, "gpio flags %#04x\n", flags);
if (flags & ES8316_GPIO_FLAG_HP_NOT_INSERTED) {
/* Jack unplugged underneath us */
es8316_disable_micbias_for_mic_gnd_short_detect(comp);
} else if (flags & ES8316_GPIO_FLAG_GM_NOT_SHORTED) {
/* Open, headset */
snd_soc_jack_report(es8316->jack,
SND_JACK_HEADSET,
SND_JACK_HEADSET);
/* Keep mic-gnd-short detection on for button press */
} else {
/* Shorted, headphones */
snd_soc_jack_report(es8316->jack,
SND_JACK_HEADPHONE,
SND_JACK_HEADSET);
/* No longer need mic-gnd-short detection */
es8316_disable_micbias_for_mic_gnd_short_detect(comp);
}
} else if (es8316->jack->status & SND_JACK_MICROPHONE) {
/* Interrupt while jack inserted, report button state */
if (flags & ES8316_GPIO_FLAG_GM_NOT_SHORTED) {
/* Open, button release */
snd_soc_jack_report(es8316->jack, 0, SND_JACK_BTN_0);
} else {
/* Short, button press */
snd_soc_jack_report(es8316->jack,
SND_JACK_BTN_0,
SND_JACK_BTN_0);
}
}
out:
mutex_unlock(&es8316->lock);
return IRQ_HANDLED;
}
static void es8316_enable_jack_detect(struct snd_soc_component *component,
struct snd_soc_jack *jack)
{
struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component);
mutex_lock(&es8316->lock);
es8316->jack = jack;
if (es8316->jack->status & SND_JACK_MICROPHONE)
es8316_enable_micbias_for_mic_gnd_short_detect(component);
snd_soc_component_update_bits(component, ES8316_GPIO_DEBOUNCE,
ES8316_GPIO_ENABLE_INTERRUPT,
ES8316_GPIO_ENABLE_INTERRUPT);
mutex_unlock(&es8316->lock);
/* Enable irq and sync initial jack state */
enable_irq(es8316->irq);
es8316_irq(es8316->irq, es8316);
}
static void es8316_disable_jack_detect(struct snd_soc_component *component)
{
struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component);
disable_irq(es8316->irq);
mutex_lock(&es8316->lock);
snd_soc_component_update_bits(component, ES8316_GPIO_DEBOUNCE,
ES8316_GPIO_ENABLE_INTERRUPT, 0);
if (es8316->jack->status & SND_JACK_MICROPHONE) {
es8316_disable_micbias_for_mic_gnd_short_detect(component);
snd_soc_jack_report(es8316->jack, 0, SND_JACK_BTN_0);
}
es8316->jack = NULL;
mutex_unlock(&es8316->lock);
}
static int es8316_set_jack(struct snd_soc_component *component,
struct snd_soc_jack *jack, void *data)
{
if (jack)
es8316_enable_jack_detect(component, jack);
else
es8316_disable_jack_detect(component);
return 0;
}
static int es8316_probe(struct snd_soc_component *component)
{
struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component);
es8316->component = component;
/* Reset codec and enable current state machine */
snd_soc_component_write(component, ES8316_RESET, 0x3f);
usleep_range(5000, 5500);
@ -555,6 +716,7 @@ static int es8316_probe(struct snd_soc_component *component)
static const struct snd_soc_component_driver soc_component_dev_es8316 = {
.probe = es8316_probe,
.set_jack = es8316_set_jack,
.controls = es8316_snd_controls,
.num_controls = ARRAY_SIZE(es8316_snd_controls),
.dapm_widgets = es8316_dapm_widgets,
@ -566,18 +728,29 @@ static const struct snd_soc_component_driver soc_component_dev_es8316 = {
.non_legacy_dai_naming = 1,
};
static const struct regmap_range es8316_volatile_ranges[] = {
regmap_reg_range(ES8316_GPIO_FLAG, ES8316_GPIO_FLAG),
};
static const struct regmap_access_table es8316_volatile_table = {
.yes_ranges = es8316_volatile_ranges,
.n_yes_ranges = ARRAY_SIZE(es8316_volatile_ranges),
};
static const struct regmap_config es8316_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x53,
.volatile_table = &es8316_volatile_table,
.cache_type = REGCACHE_RBTREE,
};
static int es8316_i2c_probe(struct i2c_client *i2c_client,
const struct i2c_device_id *id)
{
struct device *dev = &i2c_client->dev;
struct es8316_priv *es8316;
struct regmap *regmap;
int ret;
es8316 = devm_kzalloc(&i2c_client->dev, sizeof(struct es8316_priv),
GFP_KERNEL);
@ -586,9 +759,23 @@ static int es8316_i2c_probe(struct i2c_client *i2c_client,
i2c_set_clientdata(i2c_client, es8316);
regmap = devm_regmap_init_i2c(i2c_client, &es8316_regmap);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
es8316->regmap = devm_regmap_init_i2c(i2c_client, &es8316_regmap);
if (IS_ERR(es8316->regmap))
return PTR_ERR(es8316->regmap);
es8316->irq = i2c_client->irq;
mutex_init(&es8316->lock);
ret = devm_request_threaded_irq(dev, es8316->irq, NULL, es8316_irq,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"es8316", es8316);
if (ret == 0) {
/* Gets re-enabled by es8316_set_jack() */
disable_irq(es8316->irq);
} else {
dev_warn(dev, "Failed to get IRQ %d: %d\n", es8316->irq, ret);
es8316->irq = -ENXIO;
}
return devm_snd_soc_register_component(&i2c_client->dev,
&soc_component_dev_es8316,

7
sound/soc/codecs/es8316.h
View File

@ -126,4 +126,11 @@
#define ES8316_SERDATA2_LEN_16 0x0c
#define ES8316_SERDATA2_LEN_32 0x10
/* ES8316_GPIO_DEBOUNCE */
#define ES8316_GPIO_ENABLE_INTERRUPT 0x02
/* ES8316_GPIO_FLAG */
#define ES8316_GPIO_FLAG_GM_NOT_SHORTED 0x02
#define ES8316_GPIO_FLAG_HP_NOT_INSERTED 0x04
#endif