ASoC: cs42l42: Report jack and button detection

Report the Jack events to the user space through ALSA.
Also moves request_threaded_irq() to component_probe so it don't get
interrupts before the initialization the struct snd_soc_jack.
Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210306185553.62053-12-tanureal@opensource.cirrus.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/cs42l42.c

@@ -522,10 +522,18 @@ static int cs42l42_component_probe(struct snd_soc_component *component)
 {
 	struct cs42l42_private *cs42l42 =
 		(struct cs42l42_private *)snd_soc_component_get_drvdata(component);
+	struct snd_soc_card *crd = component->card;
+	int ret = 0;
 
 	cs42l42->component = component;
 
-	return 0;
+	ret = snd_soc_card_jack_new(crd, "CS42L42 Headset", SND_JACK_HEADSET | SND_JACK_BTN_0 |
+				    SND_JACK_BTN_1 | SND_JACK_BTN_2 | SND_JACK_BTN_3,
+				    &cs42l42->jack, NULL, 0);
+	if (ret < 0)
+		dev_err(component->dev, "Cannot create CS42L42 Headset: %d\n", ret);
+
+	return ret;
 }
 
 static const struct snd_soc_component_driver soc_component_dev_cs42l42 = {
@@ -1198,7 +1206,7 @@ static void cs42l42_cancel_hs_type_detect(struct cs42l42_private *cs42l42)
 				(3 << CS42L42_HSDET_AUTO_TIME_SHIFT));
 }
 
-static void cs42l42_handle_button_press(struct cs42l42_private *cs42l42)
+static int cs42l42_handle_button_press(struct cs42l42_private *cs42l42)
 {
 	int bias_level;
 	unsigned int detect_status;
@@ -1241,17 +1249,24 @@ static void cs42l42_handle_button_press(struct cs42l42_private *cs42l42)
 
 	switch (bias_level) {
 	case 1: /* Function C button press */
+		bias_level = SND_JACK_BTN_2;
 		dev_dbg(cs42l42->component->dev, "Function C button press\n");
 		break;
 	case 2: /* Function B button press */
+		bias_level = SND_JACK_BTN_1;
 		dev_dbg(cs42l42->component->dev, "Function B button press\n");
 		break;
 	case 3: /* Function D button press */
+		bias_level = SND_JACK_BTN_3;
 		dev_dbg(cs42l42->component->dev, "Function D button press\n");
 		break;
 	case 4: /* Function A button press */
+		bias_level = SND_JACK_BTN_0;
 		dev_dbg(cs42l42->component->dev, "Function A button press\n");
 		break;
+	default:
+		bias_level = 0;
+		break;
 	}
 
 	/* Set button detect level sensitivity back to default */
@@ -1281,6 +1296,8 @@ static void cs42l42_handle_button_press(struct cs42l42_private *cs42l42)
 		(0 << CS42L42_M_HSBIAS_HIZ_SHIFT) |
 		(1 << CS42L42_M_SHORT_RLS_SHIFT) |
 		(1 << CS42L42_M_SHORT_DET_SHIFT));
+
+	return bias_level;
 }
 
 struct cs42l42_irq_params {
@@ -1325,6 +1342,8 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
 	unsigned int current_plug_status;
 	unsigned int current_button_status;
 	unsigned int i;
+	int report = 0;
+
 
 	/* Read sticky registers to clear interurpt */
 	for (i = 0; i < ARRAY_SIZE(stickies); i++) {
@@ -1351,9 +1370,20 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
 	if ((~masks[5]) & irq_params_table[5].mask) {
 		if (stickies[5] & CS42L42_HSDET_AUTO_DONE_MASK) {
 			cs42l42_process_hs_type_detect(cs42l42);
-			dev_dbg(component->dev,
-				"Auto detect done (%d)\n",
-				cs42l42->hs_type);
+			switch(cs42l42->hs_type){
+			case CS42L42_PLUG_CTIA:
+			case CS42L42_PLUG_OMTP:
+				snd_soc_jack_report(&cs42l42->jack, SND_JACK_HEADSET,
+						    SND_JACK_HEADSET);
+				break;
+			case CS42L42_PLUG_HEADPHONE:
+				snd_soc_jack_report(&cs42l42->jack, SND_JACK_HEADPHONE,
+						    SND_JACK_HEADPHONE);
+				break;
+			default:
+				break;
+			}
+			dev_dbg(component->dev, "Auto detect done (%d)\n", cs42l42->hs_type);
 		}
 	}
 
@@ -1371,8 +1401,19 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
 			if (cs42l42->plug_state != CS42L42_TS_UNPLUG) {
 				cs42l42->plug_state = CS42L42_TS_UNPLUG;
 				cs42l42_cancel_hs_type_detect(cs42l42);
-				dev_dbg(component->dev,
-					"Unplug event\n");
+
+				switch(cs42l42->hs_type){
+				case CS42L42_PLUG_CTIA:
+				case CS42L42_PLUG_OMTP:
+					snd_soc_jack_report(&cs42l42->jack, 0, SND_JACK_HEADSET);
+					break;
+				case CS42L42_PLUG_HEADPHONE:
+					snd_soc_jack_report(&cs42l42->jack, 0, SND_JACK_HEADPHONE);
+					break;
+				default:
+					break;
+				}
+				dev_dbg(component->dev, "Unplug event\n");
 			}
 			break;
 
@@ -1387,14 +1428,15 @@ static irqreturn_t cs42l42_irq_thread(int irq, void *data)
 		if (!(current_button_status &
 			CS42L42_M_HSBIAS_HIZ_MASK)) {
 
-			if (current_button_status &
-				CS42L42_M_DETECT_TF_MASK) {
-				dev_dbg(component->dev,
-					"Button released\n");
-			} else if (current_button_status &
-				CS42L42_M_DETECT_FT_MASK) {
-				cs42l42_handle_button_press(cs42l42);
+			if (current_button_status & CS42L42_M_DETECT_TF_MASK) {
+				dev_dbg(component->dev, "Button released\n");
+				report = 0;
+			} else if (current_button_status & CS42L42_M_DETECT_FT_MASK) {
+				report = cs42l42_handle_button_press(cs42l42);
+
 			}
+			snd_soc_jack_report(&cs42l42->jack, report, SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+								   SND_JACK_BTN_2 | SND_JACK_BTN_3);
 		}
 	}
 

sound/soc/codecs/cs42l42.h

@@ -12,6 +12,8 @@
 #ifndef __CS42L42_H__
 #define __CS42L42_H__
 
+#include <sound/jack.h>
+
 #define CS42L42_PAGE_REGISTER	0x00	/* Page Select Register */
 #define CS42L42_WIN_START	0x00
 #define CS42L42_WIN_LEN		0x100
@@ -768,6 +770,7 @@ struct  cs42l42_private {
 	struct regulator_bulk_data supplies[CS42L42_NUM_SUPPLIES];
 	struct gpio_desc *reset_gpio;
 	struct completion pdn_done;
+	struct snd_soc_jack jack;
 	u32 sclk;
 	u32 srate;
 	u8 plug_state;