ASoC: rt5640: Add jack-detect support

Add jack-detect support, loosely based on earlier work on this by:

Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Francisco mendez <francisco.mendez@intel.com>

Note getting the OVCD to work reliable was sort of finicky, so there are
quite a few comments on this to hopefully avoid people breaking it in the
future.

This (and the follow-up button press support) has been tested on the
following devices:

Acer Iconia Tab 8 W1-810
Asus T100CHI
Asus T100TA
Asus T200TA
Axxo WT1011
Chuwi Vi8
Dell Venue 8 Pro 5830
HP Pavilion X2 10-n000nd
HP Stream 7
I.T. Works TW891
Lamina I8270
MSI S100
Peaq C1010
Pipo W4
PoV MobiiTAB-P800W (v2.0)
Toshiba Click Mini L9W-B

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=196377Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5640.h

@@ -13,6 +13,8 @@
 #define _RT5640_H
 
 #include <linux/clk.h>
+#include <linux/workqueue.h>
+#include <dt-bindings/sound/rt5640.h>
 
 /* Info */
 #define RT5640_RESET				0x00
@@ -145,6 +147,7 @@
 
 
 /* Index of Codec Private Register definition */
+#define RT5640_BIAS_CUR4			0x15
 #define RT5640_CHPUMP_INT_REG1			0x24
 #define RT5640_MAMP_INT_REG2			0x37
 #define RT5640_3D_SPK				0x63
@@ -1606,10 +1609,17 @@
 #define RT5640_MB2_OC_P_SFT			6
 #define RT5640_MB2_OC_P_NOR			(0x0 << 6)
 #define RT5640_MB2_OC_P_INV			(0x1 << 6)
-#define RT5640_MB1_OC_CLR			(0x1 << 3)
-#define RT5640_MB1_OC_CLR_SFT			3
-#define RT5640_MB2_OC_CLR			(0x1 << 2)
-#define RT5640_MB2_OC_CLR_SFT			2
+#define RT5640_MB1_OC_STATUS			(0x1 << 3)
+#define RT5640_MB1_OC_STATUS_SFT		3
+#define RT5640_MB2_OC_STATUS			(0x1 << 2)
+#define RT5640_MB2_OC_STATUS_SFT		2
+
+/* GPIO and Internal Status (0xbf) */
+#define RT5640_GPIO1_STATUS			(0x1 << 8)
+#define RT5640_GPIO2_STATUS			(0x1 << 7)
+#define RT5640_JD_STATUS			(0x1 << 4)
+#define RT5640_OVT_STATUS			(0x1 << 3)
+#define RT5640_CLS_D_OVCD_STATUS		(0x1 << 0)
 
 /* GPIO Control 1 (0xc0) */
 #define RT5640_GP1_PIN_MASK			(0x1 << 15)
@@ -1977,6 +1987,15 @@
 #define RT5640_MCLK_DET				(0x1 << 11)
 
 /* Codec Private Register definition */
+
+/* MIC Over current threshold scale factor (0x15) */
+#define RT5640_MIC_OVCD_SF_MASK			(0x3 << 8)
+#define RT5640_MIC_OVCD_SF_SFT			8
+#define RT5640_MIC_OVCD_SF_0P5			(0x0 << 8)
+#define RT5640_MIC_OVCD_SF_0P75			(0x1 << 8)
+#define RT5640_MIC_OVCD_SF_1P0			(0x2 << 8)
+#define RT5640_MIC_OVCD_SF_1P5			(0x3 << 8)
+
 /* 3D Speaker Control (0x63) */
 #define RT5640_3D_SPK_MASK			(0x1 << 15)
 #define RT5640_3D_SPK_SFT			15
@@ -2106,6 +2125,7 @@ struct rt5640_priv {
 	struct clk *mclk;
 
 	int ldo1_en; /* GPIO for LDO1_EN */
+	int irq;
 	int sysclk;
 	int sysclk_src;
 	int lrck[RT5640_AIFS];
@@ -2118,6 +2138,14 @@ struct rt5640_priv {
 
 	bool hp_mute;
 	bool asrc_en;
+
+	/* Jack detect data */
+	struct work_struct jack_work;
+	struct snd_soc_jack *jack;
+	unsigned int jd_src;
+	bool jd_inverted;
+	unsigned int ovcd_th;
+	unsigned int ovcd_sf;
 };
 
 int rt5640_dmic_enable(struct snd_soc_component *component,