We get the insertion event before the jack is fully inserted at which point the second ring on a TRRS connector may short the 2nd ring and sleeve contacts. Testing has shown that this short-circuit may happen as late as 500ms after the insertion event, but it never lasts longer then 300ms.
This commit changes the detection algorithm to require 5 identical OVCD values in a row at 100 ms intervals to fix the jack-type sometimes getting mis-detected.
Tested-by: Carlo Caione carlo@endlessm.com Signed-off-by: Hans de Goede hdegoede@redhat.com --- sound/soc/codecs/rt5651.c | 110 +++++++++++++++++++++++++++++----------------- sound/soc/codecs/rt5651.h | 2 +- 2 files changed, 70 insertions(+), 42 deletions(-)
diff --git a/sound/soc/codecs/rt5651.c b/sound/soc/codecs/rt5651.c index 3870c0f3b30f..6b5669f3e85d 100644 --- a/sound/soc/codecs/rt5651.c +++ b/sound/soc/codecs/rt5651.c @@ -1622,12 +1622,76 @@ static bool rt5651_jack_inserted(struct snd_soc_component *component) return val == 0; }
+/* Jack detect timings */ +#define JACK_SETTLE_TIME 100 /* milli seconds */ +#define JACK_DETECT_COUNT 5 +#define JACK_DETECT_MAXCOUNT 20 /* Aprox. 2 seconds worth of tries */ + +static int rt5651_detect_headset(struct snd_soc_component *component) +{ + int i, headset_count = 0, headphone_count = 0; + + /* + * We get the insertion event before the jack is fully inserted at which + * point the second ring on a TRRS connector may short the 2nd ring and + * sleeve contacts, also the overcurrent detection is not entirely + * reliable. So we try several times with a wait in between until we + * detect the same type JACK_DETECT_COUNT times in a row. + */ + for (i = 0; i < JACK_DETECT_MAXCOUNT; i++) { + /* Clear any previous over-current status flag */ + rt5651_clear_micbias1_ovcd(component); + + msleep(JACK_SETTLE_TIME); + + /* Check the jack is still connected before checking ovcd */ + if (!rt5651_jack_inserted(component)) + return 0; + + if (rt5651_micbias1_ovcd(component)) { + /* + * Over current detected, there is a short between the + * 2nd ring contact and the ground, so a TRS connector + * without a mic contact and thus plain headphones. + */ + dev_dbg(component->dev, "mic-gnd shorted\n"); + headset_count = 0; + headphone_count++; + if (headphone_count == JACK_DETECT_COUNT) + return SND_JACK_HEADPHONE; + } else { + dev_dbg(component->dev, "mic-gnd open\n"); + headphone_count = 0; + headset_count++; + if (headset_count == JACK_DETECT_COUNT) + return SND_JACK_HEADSET; + } + } + + dev_err(component->dev, "Error detecting headset vs headphones, bad contact?, assuming headphones\n"); + return SND_JACK_HEADPHONE; +} + +static void rt5651_jack_detect_work(struct work_struct *work) +{ + struct rt5651_priv *rt5651 = + container_of(work, struct rt5651_priv, jack_detect_work); + int report = 0; + + if (rt5651_jack_inserted(rt5651->component)) { + rt5651_enable_micbias1_for_ovcd(rt5651->component); + report = rt5651_detect_headset(rt5651->component); + rt5651_disable_micbias1_for_ovcd(rt5651->component); + } + + snd_soc_jack_report(rt5651->hp_jack, report, SND_JACK_HEADSET); +} + static irqreturn_t rt5651_irq(int irq, void *data) { struct rt5651_priv *rt5651 = data;
- queue_delayed_work(system_power_efficient_wq, - &rt5651->jack_detect_work, msecs_to_jiffies(250)); + queue_work(system_power_efficient_wq, &rt5651->jack_detect_work);
return IRQ_HANDLED; } @@ -1715,8 +1779,7 @@ static int rt5651_set_jack(struct snd_soc_component *component, }
/* sync initial jack state */ - queue_delayed_work(system_power_efficient_wq, - &rt5651->jack_detect_work, 0); + queue_work(system_power_efficient_wq, &rt5651->jack_detect_work);
return 0; } @@ -1929,41 +1992,6 @@ static const struct i2c_device_id rt5651_i2c_id[] = { }; MODULE_DEVICE_TABLE(i2c, rt5651_i2c_id);
-static int rt5651_jack_detect(struct snd_soc_component *component, int jack_insert) -{ - int jack_type; - - if (jack_insert) { - rt5651_enable_micbias1_for_ovcd(component); - rt5651_clear_micbias1_ovcd(component); - msleep(100); - if (rt5651_micbias1_ovcd(component)) - jack_type = SND_JACK_HEADPHONE; - else - jack_type = SND_JACK_HEADSET; - rt5651_disable_micbias1_for_ovcd(component); - } else { /* jack out */ - jack_type = 0; - } - - return jack_type; -} - -static void rt5651_jack_detect_work(struct work_struct *work) -{ - struct rt5651_priv *rt5651 = - container_of(work, struct rt5651_priv, jack_detect_work.work); - int report, jack_inserted; - - if (!rt5651->component) - return; - - jack_inserted = rt5651_jack_inserted(rt5651->component); - report = rt5651_jack_detect(rt5651->component, jack_inserted); - - snd_soc_jack_report(rt5651->hp_jack, report, SND_JACK_HEADSET); -} - /* * Note this function MUST not look at device-properties, see the comment * above rt5651_apply_properties(). @@ -2006,7 +2034,7 @@ static int rt5651_i2c_probe(struct i2c_client *i2c, rt5651->irq = i2c->irq; rt5651->hp_mute = 1;
- INIT_DELAYED_WORK(&rt5651->jack_detect_work, rt5651_jack_detect_work); + INIT_WORK(&rt5651->jack_detect_work, rt5651_jack_detect_work);
ret = devm_snd_soc_register_component(&i2c->dev, &soc_component_dev_rt5651, @@ -2019,7 +2047,7 @@ static int rt5651_i2c_remove(struct i2c_client *i2c) { struct rt5651_priv *rt5651 = i2c_get_clientdata(i2c);
- cancel_delayed_work_sync(&rt5651->jack_detect_work); + cancel_work_sync(&rt5651->jack_detect_work);
return 0; } diff --git a/sound/soc/codecs/rt5651.h b/sound/soc/codecs/rt5651.h index 71738ab93fb9..f20c9be94fb2 100644 --- a/sound/soc/codecs/rt5651.h +++ b/sound/soc/codecs/rt5651.h @@ -2072,7 +2072,7 @@ struct rt5651_priv { struct snd_soc_component *component; struct regmap *regmap; struct snd_soc_jack *hp_jack; - struct delayed_work jack_detect_work; + struct work_struct jack_detect_work; enum rt5651_jd_src jd_src; unsigned int ovcd_th; unsigned int ovcd_sf;