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ASoC: rt5651: Enable sticky mode for OVCD

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When the mic-gnd contacts are short-circuited by a headphones plug, the
hardware periodically retries if it can apply the bias-current leading to
the OVCD status flip-flopping 1-0-1 with it being 0 about 10% of the time.
This commit enables the sticky bit for the OVCD status to deal with this.

This commit also introduces 2 helper functions to deal with the OVCD
status bit, this may seem a bit overkill now, but these will also be
used in future patches.

Tested-by: Carlo Caione <carlo@endlessm.com>
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 2018-03-04 15:35:54 +01:00 committed by Mark Brown
parent e6eb020759
commit 1b1ad83539
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GPG Key ID: 24D68B725D5487D0
1 changed files with 30 additions and 3 deletions
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33
sound/soc/codecs/rt5651.c
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@ -1578,6 +1578,22 @@ static void rt5651_disable_micbias1_for_ovcd(struct snd_soc_component *component
snd_soc_dapm_mutex_unlock(dapm);
}
static void rt5651_clear_micbias1_ovcd(struct snd_soc_component *component)
{
snd_soc_component_update_bits(component, RT5651_IRQ_CTRL2,
RT5651_MB1_OC_CLR, 0);
}
static bool rt5651_micbias1_ovcd(struct snd_soc_component *component)
{
int val;
val = snd_soc_component_read32(component, RT5651_IRQ_CTRL2);
dev_dbg(component->dev, "irq ctrl2 %#04x\n", val);
return (val & RT5651_MB1_OC_CLR);
}
static irqreturn_t rt5651_irq(int irq, void *data)
{
struct rt5651_priv *rt5651 = data;
@ -1646,6 +1662,18 @@ static int rt5651_set_jack(struct snd_soc_component *component,
RT5651_PWR_MB_PU |
RT5651_PWR_CLK12M_PU);
/*
* The over-current-detect is only reliable in detecting the absence
* of over-current, when the mic-contact in the jack is short-circuited,
* the hardware periodically retries if it can apply the bias-current
* leading to the ovcd status flip-flopping 1-0-1 with it being 0 about
* 10% of the time, as we poll the ovcd status bit we might hit that
* 10%, so we enable sticky mode and when checking OVCD we clear the
* status, msleep() a bit and then check to get a reliable reading.
*/
snd_soc_component_update_bits(component, RT5651_IRQ_CTRL2,
RT5651_MB1_OC_STKY_MASK, RT5651_MB1_OC_STKY_EN);
rt5651->hp_jack = hp_jack;
ret = devm_request_threaded_irq(component->dev, rt5651->irq, NULL,
@ -1878,13 +1906,12 @@ static int rt5651_jack_detect(struct snd_soc_component *component, int jack_inse
if (jack_insert) {
rt5651_enable_micbias1_for_ovcd(component);
rt5651_clear_micbias1_ovcd(component);
msleep(100);
if (snd_soc_component_read32(component, RT5651_IRQ_CTRL2) & RT5651_MB1_OC_CLR)
if (rt5651_micbias1_ovcd(component))
jack_type = SND_JACK_HEADPHONE;
else
jack_type = SND_JACK_HEADSET;
snd_soc_component_update_bits(component, RT5651_IRQ_CTRL2,
RT5651_MB1_OC_CLR, 0);
rt5651_disable_micbias1_for_ovcd(component);
} else { /* jack out */
jack_type = 0;