[PATCH v2 1/3] ASoC: cs42l42: Report full jack status when plug is detected

[Richard Fitzgerald]

When a plug event is detect report the full state of all status
bits, don't assume that there will have been a previous unplug
event to clear all the bits. Report the state of both HEADPHONE
and MICROPHONE bits according to detected type, and clear all the
button status bits. The current button status is already checked
and reported at the end of the function.

During a system suspend the jack could be unplugged and plugged,
possibly changing the jack type. On resume the interrupt status will
indicate a plug event - there will not be an unplug event to clear
the bits.

Signed-off-by: Richard Fitzgerald <rf at opensource.cirrus.com>
---
 sound/soc/codecs/cs42l42.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index 43d98bdb5b5b..2c294868008e 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -1637,7 +1637,11 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
 
 	mutex_lock(&cs42l42->jack_detect_mutex);
 
-	/* Check auto-detect status */
+	/*
+	 * Check auto-detect status. Don't assume a previous unplug event has
+	 * cleared the flags. If the jack is unplugged and plugged during
+	 * system suspend there won't have been an unplug event.
+	 */
 	if ((~masks[5]) & irq_params_table[5].mask) {
 		if (stickies[5] & CS42L42_HSDET_AUTO_DONE_MASK) {
 			cs42l42_process_hs_type_detect(cs42l42);
@@ -1645,11 +1649,15 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
 			case CS42L42_PLUG_CTIA:
 			case CS42L42_PLUG_OMTP:
 				snd_soc_jack_report(cs42l42->jack, SND_JACK_HEADSET,
-						    SND_JACK_HEADSET);
+						    SND_JACK_HEADSET |
+						    SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+						    SND_JACK_BTN_2 | SND_JACK_BTN_3);
 				break;
 			case CS42L42_PLUG_HEADPHONE:
 				snd_soc_jack_report(cs42l42->jack, SND_JACK_HEADPHONE,
-						    SND_JACK_HEADPHONE);
+						    SND_JACK_HEADSET |
+						    SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+						    SND_JACK_BTN_2 | SND_JACK_BTN_3);
 				break;
 			default:
 				break;
-- 
2.11.0