From c309a3e8793f7e01c4a4ec7960658380572cb576 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sun, 7 Mar 2021 16:17:56 +0100 Subject: extcon: arizona: Fix some issues when HPDET IRQ fires after the jack has been unplugged When the jack is partially inserted and then removed again it may be removed while the hpdet code is running. In this case the following may happen: 1. The "JACKDET rise" or ""JACKDET fall" IRQ triggers 2. arizona_jackdet runs and takes info->lock 3. The "HPDET" IRQ triggers 4. arizona_hpdet_irq runs, blocks on info->lock 5. arizona_jackdet calls arizona_stop_mic() and clears info->hpdet_done 6. arizona_jackdet releases info->lock 7. arizona_hpdet_irq now can continue running and: 7.1 Calls arizona_start_mic() (if a mic was detected) 7.2 sets info->hpdet_done Step 7 is undesirable / a bug: 7.1 causes the device to stay in a high power-state (with MICVDD enabled) 7.2 causes hpdet to not run on the next jack insertion, which in turn causes the EXTCON_JACK_HEADPHONE state to never get set This fixes both issues by skipping these 2 steps when arizona_hpdet_irq runs after the jack has been unplugged. Signed-off-by: Hans de Goede Reviewed-by: Andy Shevchenko Acked-by: Charles Keepax Tested-by: Charles Keepax Acked-by: Chanwoo Choi Signed-off-by: Lee Jones --- drivers/extcon/extcon-arizona.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) (limited to 'drivers/extcon') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index aae82db542a5..f7ef247de46a 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -601,7 +601,7 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data) struct arizona *arizona = info->arizona; int id_gpio = arizona->pdata.hpdet_id_gpio; unsigned int report = EXTCON_JACK_HEADPHONE; - int ret, reading; + int ret, reading, state; bool mic = false; mutex_lock(&info->lock); @@ -614,12 +614,11 @@ static irqreturn_t arizona_hpdet_irq(int irq, void *data) } /* If the cable was removed while measuring ignore the result */ - ret = extcon_get_state(info->edev, EXTCON_MECHANICAL); - if (ret < 0) { - dev_err(arizona->dev, "Failed to check cable state: %d\n", - ret); + state = extcon_get_state(info->edev, EXTCON_MECHANICAL); + if (state < 0) { + dev_err(arizona->dev, "Failed to check cable state: %d\n", state); goto out; - } else if (!ret) { + } else if (!state) { dev_dbg(arizona->dev, "Ignoring HPDET for removed cable\n"); goto done; } @@ -667,7 +666,7 @@ done: gpio_set_value_cansleep(id_gpio, 0); /* If we have a mic then reenable MICDET */ - if (mic || info->mic) + if (state && (mic || info->mic)) arizona_start_mic(info); if (info->hpdet_active) { @@ -675,7 +674,9 @@ done: info->hpdet_active = false; } - info->hpdet_done = true; + /* Do not set hp_det done when the cable has been unplugged */ + if (state) + info->hpdet_done = true; out: mutex_unlock(&info->lock); -- cgit v1.2.3-59-g8ed1b