In pathological cases the microphone detection may fail to report, for example due to a failure to get a stable measurement. Provide a timeout to cover such cases.
Signed-off-by: Mark Brown <[email protected]> --- drivers/extcon/extcon-arizona.c | 38 +++++++++++++++++++++++++++++++++++--- 1 file changed, 35 insertions(+), 3 deletions(-) diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index a83ca27a..e2d881a 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -42,6 +42,7 @@ #define ARIZONA_HPDET_MAX 10000 #define HPDET_DEBOUNCE 500 +#define MICD_TIMEOUT 2000 struct arizona_extcon_info { struct device *dev; @@ -63,6 +64,7 @@ struct arizona_extcon_info { bool micd_clamp; struct delayed_work hpdet_work; + struct delayed_work micd_timeout_work; bool hpdet_active; bool hpdet_done; @@ -730,6 +732,24 @@ err: info->hpdet_active = false; } +static void arizona_micd_timeout_work(struct work_struct *work) +{ + struct arizona_extcon_info *info = container_of(work, + struct arizona_extcon_info, + micd_timeout_work.work); + + mutex_lock(&info->lock); + + dev_dbg(info->arizona->dev, "MICD timed out, reporting HP\n"); + arizona_identify_headphone(info); + + info->detecting = false; + + arizona_stop_mic(info); + + mutex_unlock(&info->lock); +} + static irqreturn_t arizona_micdet(int irq, void *data) { struct arizona_extcon_info *info = data; @@ -737,6 +757,8 @@ static irqreturn_t arizona_micdet(int irq, void *data) unsigned int val = 0, lvl; int ret, i, key; + cancel_delayed_work_sync(&info->micd_timeout_work); + mutex_lock(&info->lock); for (i = 0; i < 10 && !(val & 0x7fc); i++) { @@ -858,6 +880,10 @@ static irqreturn_t arizona_micdet(int irq, void *data) } handled: + if (info->detecting) + schedule_delayed_work(&info->micd_timeout_work, + msecs_to_jiffies(MICD_TIMEOUT)); + pm_runtime_mark_last_busy(info->dev); mutex_unlock(&info->lock); @@ -880,10 +906,11 @@ static irqreturn_t arizona_jackdet(int irq, void *data) struct arizona_extcon_info *info = data; struct arizona *arizona = info->arizona; unsigned int val, present, mask; - bool cancelled; + bool cancelled_hp, cancelled_mic; int ret, i; - cancelled = cancel_delayed_work_sync(&info->hpdet_work); + cancelled_hp = cancel_delayed_work_sync(&info->hpdet_work); + cancelled_mic = cancel_delayed_work_sync(&info->micd_timeout_work); pm_runtime_get_sync(info->dev); @@ -909,10 +936,14 @@ static irqreturn_t arizona_jackdet(int irq, void *data) val &= mask; if (val == info->last_jackdet) { dev_dbg(arizona->dev, "Suppressing duplicate JACKDET\n"); - if (cancelled) + if (cancelled_hp) schedule_delayed_work(&info->hpdet_work, msecs_to_jiffies(HPDET_DEBOUNCE)); + if (cancelled_mic) + schedule_delayed_work(&info->micd_timeout_work, + msecs_to_jiffies(MICD_TIMEOUT)); + goto out; } info->last_jackdet = val; @@ -1037,6 +1068,7 @@ static int arizona_extcon_probe(struct platform_device *pdev) info->dev = &pdev->dev; info->last_jackdet = ~(ARIZONA_MICD_CLAMP_STS | ARIZONA_JD1_STS); INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work); + INIT_DELAYED_WORK(&info->micd_timeout_work, arizona_micd_timeout_work); platform_set_drvdata(pdev, info); switch (arizona->type) { -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
