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ASoC: wm8994: Defer declaration of open circuit microphones 

Provide a bit of debounce to handle pathological cases with slow input
better by allowing the microphone detection to run for a bit longer.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2013-05-29 20:28:16 +01:00
parent f7dbd399ef
commit 70bd3b298b
2 changed files with 32 additions and 9 deletions
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40
sound/soc/codecs/wm8994.c
View File

@ -3513,6 +3513,31 @@ static void wm8958_button_det(struct snd_soc_codec *codec, u16 status)
wm8994->btn_mask);
}
static void wm8958_open_circuit_work(struct work_struct *work)
{
struct wm8994_priv *wm8994 = container_of(work,
struct wm8994_priv,
open_circuit_work.work);
struct device *dev = wm8994->wm8994->dev;
wm1811_micd_stop(wm8994->hubs.codec);
mutex_lock(&wm8994->accdet_lock);
dev_dbg(dev, "Reporting open circuit\n");
wm8994->jack_mic = false;
wm8994->mic_detecting = true;
wm8958_micd_set_rate(wm8994->hubs.codec);
snd_soc_jack_report(wm8994->micdet[0].jack, 0,
wm8994->btn_mask |
SND_JACK_HEADSET);
mutex_unlock(&wm8994->accdet_lock);
}
static void wm8958_mic_id(void *data, u16 status)
{
struct snd_soc_codec *codec = data;
@ -3522,16 +3547,9 @@ static void wm8958_mic_id(void *data, u16 status)
if (!(status & WM8958_MICD_STS)) {
/* If nothing present then clear our statuses */
dev_dbg(codec->dev, "Detected open circuit\n");
wm8994->jack_mic = false;
wm8994->mic_detecting = true;
wm1811_micd_stop(codec);
wm8958_micd_set_rate(codec);
snd_soc_jack_report(wm8994->micdet[0].jack, 0,
wm8994->btn_mask |
SND_JACK_HEADSET);
schedule_delayed_work(&wm8994->open_circuit_work,
msecs_to_jiffies(2500));
return;
}
@ -3812,6 +3830,8 @@ static irqreturn_t wm8958_mic_irq(int irq, void *data)
if (!(snd_soc_read(codec, WM8958_MIC_DETECT_1) & WM8958_MICD_ENA))
return IRQ_HANDLED;
cancel_delayed_work_sync(&wm8994->open_circuit_work);
pm_runtime_get_sync(codec->dev);
/* We may occasionally read a detection without an impedence
@ -3911,6 +3931,8 @@ static int wm8994_codec_probe(struct snd_soc_codec *codec)
mutex_init(&wm8994->accdet_lock);
INIT_DELAYED_WORK(&wm8994->jackdet_bootstrap,
wm1811_jackdet_bootstrap);
INIT_DELAYED_WORK(&wm8994->open_circuit_work,
wm8958_open_circuit_work);
switch (control->type) {
case WM8994:

1
sound/soc/codecs/wm8994.h
View File

@ -134,6 +134,7 @@ struct wm8994_priv {
struct mutex accdet_lock;
struct wm8994_micdet micdet[2];
struct delayed_work mic_work;
struct delayed_work open_circuit_work;
bool mic_detecting;
bool jack_mic;
int btn_mask;