touch:fts: support prox_palm and touch gesture during phone call

During the phone call, report special proximity palm event for sensor
HAL proximity fusion.

Bug: 154675013

Change-Id: Ib7a1ecea7e2c7d350c3bfcd31de8d589642a86ed
Signed-off-by: davidycchen <davidycchen@google.com>

4 files changed, 182 insertions, 1 deletions

diff --git a/fts.c b/fts.c
index 1761d3e..fe377c7 100644
--- a/fts.c
+++ b/fts.c
@@ -137,6 +137,20 @@ static int fts_mode_handler(struct fts_ts_info *info, int force);
 static void fts_pinctrl_setup(struct fts_ts_info *info, bool active);
 
 static int fts_chip_initialization(struct fts_ts_info *info, int init_type);
+#ifdef SUPPORT_PROX_PALM
+static ssize_t audio_status_store(struct device *dev,
+				      struct device_attribute *attr,
+				      const char *buf, size_t count);
+static ssize_t audio_status_show(struct device *dev,
+				     struct device_attribute *attr,
+				     char *buf);
+static ssize_t prox_palm_status_store(struct device *dev,
+				      struct device_attribute *attr,
+				      const char *buf, size_t count);
+static ssize_t prox_palm_status_show(struct device *dev,
+				     struct device_attribute *attr,
+				     char *buf);
+#endif
 
 /**
   * Release all the touches in the linux input subsystem
@@ -2767,6 +2781,16 @@ static DEVICE_ATTR(default_mf, 0664,
 		   fts_default_mf_show,
 		   fts_default_mf_store);
 
+#ifdef SUPPORT_PROX_PALM
+static DEVICE_ATTR(audio_status, 0644,
+		   audio_status_show,
+		   audio_status_store);
+
+static DEVICE_ATTR(prox_palm_status, 0644,
+		   prox_palm_status_show,
+		   prox_palm_status_store);
+#endif
+
 /*  /sys/devices/soc.0/f9928000.i2c/i2c-6/6-0049 */
 static struct attribute *fts_attr_group[] = {
 	 &dev_attr_infoblock_getdata.attr,
@@ -2808,9 +2832,100 @@ static struct attribute *fts_attr_group[] = {
 	&dev_attr_autotune.attr,
 	&dev_attr_touchsim.attr,
 	&dev_attr_default_mf.attr,
+#ifdef SUPPORT_PROX_PALM
+	&dev_attr_prox_palm_status.attr,
+	&dev_attr_audio_status.attr,
+#endif
 	NULL,
 };
 
+#ifdef SUPPORT_PROX_PALM
+/* sysfs file node to store audio status
+ * "echo cmd > audio_status" to change
+ */
+static ssize_t audio_status_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct fts_ts_info *info = dev_get_drvdata(dev);
+	int result;
+	int val;
+
+	result = kstrtoint(buf, 10, &val);
+	if (result < 0) {
+		pr_err("%s: Invalid input.\n", __func__);
+		return -EINVAL;
+	}
+
+	if (val == 0) {
+		fts_set_bus_ref(info, FTS_BUS_REF_PHONE_CALL, false);
+	} else {
+		fts_set_bus_ref(info, FTS_BUS_REF_PHONE_CALL, true);
+		sysfs_notify(&dev->kobj, NULL, dev_attr_prox_palm_status.attr.name);
+	}
+	info->audio_status = val;
+	pr_info("%s: audio status %d", __func__, val);
+	return count;
+}
+
+static ssize_t audio_status_show(struct device *dev,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	struct fts_ts_info *info = dev_get_drvdata(dev);
+
+	return scnprintf(buf, PAGE_SIZE, "%d\n",
+			 info->audio_status);
+}
+
+static ssize_t prox_palm_status_store(struct device *dev,
+				      struct device_attribute *attr,
+				      const char *buf, size_t count)
+{
+	struct fts_ts_info *info = dev_get_drvdata(dev);
+	int result;
+	int val;
+
+	result = kstrtoint(buf, 10, &val);
+	if (result < 0) {
+		pr_err("%s: Invalid input.\n", __func__);
+		return -EINVAL;
+	}
+
+	info->prox_palm_status = val;
+	sysfs_notify(&dev->kobj, NULL, dev_attr_prox_palm_status.attr.name);
+	pr_info("%s Notify prox_palms status %d", __func__,
+		info->prox_palm_status);
+	return count;
+}
+
+static ssize_t prox_palm_status_show(struct device *dev,
+				     struct device_attribute *attr,
+				     char *buf)
+{
+	struct fts_ts_info *info = dev_get_drvdata(dev);
+
+	return scnprintf(buf, PAGE_SIZE, "%d\n",
+			 info->prox_palm_status);
+}
+
+/**
+ * When the feature is enabled, touch IC will keep in active sensing mode
+ * but only report status event and gesture event and stop reporting
+ * pointer location event
+ */
+int enable_prox_palm_only_mode(bool enable)
+{
+	u8 cmd[3] = {0xC0, 0x0D, (u8) enable};
+	int ret = 0;
+
+	ret = fts_write(cmd, 3);
+	if (ret < 0)
+		pr_err("%s: %s failed, ret = %d", __func__,
+			enable ? "enable" : "disable", ret);
+	return ret;
+}
+#endif
 /** @}*/
 /** @}*/
 
@@ -3463,6 +3578,34 @@ static bool fts_status_event_handler(struct fts_ts_info *info, unsigned
 				event[5], event[6], event[7]);
 		break;
 
+#ifdef SUPPORT_PROX_PALM
+	case EVT_TYPE_STATUS_PROX_PALM:
+		switch (event[2]) {
+		case 0x00:
+			pr_info("%s: Proximity palm release event"
+				" = %02X %02X %02X %02X %02X %02X\n",
+				__func__, event[2], event[3], event[4],
+				event[5], event[6], event[7]);
+			info->prox_palm_status = 0;
+			sysfs_notify(&info->dev->kobj, NULL, dev_attr_prox_palm_status.attr.name);
+			break;
+
+		case 0x01:
+			pr_info("%s: Proximity palm entry event"
+				" = %02X %02X %02X %02X %02X %02X\n",
+				__func__, event[2], event[3], event[4],
+				event[5], event[6], event[7]);
+			info->prox_palm_status = 1;
+			sysfs_notify(&info->dev->kobj, NULL, dev_attr_prox_palm_status.attr.name);
+			break;
+
+		default:
+			pr_info("%s: Unknown proximity palm status = %02X %02X %02X %02X %02X %02X\n",
+				__func__, event[2], event[3], event[4],
+				event[5], event[6], event[7]);
+		}
+		break;
+#endif
 	default:
 		pr_info("%s: Received unknown status event = %02X %02X %02X %02X %02X %02X %02X %02X\n",
 			__func__, event[0], event[1], event[2], event[3],
@@ -5057,13 +5200,27 @@ static int fts_screen_state_chg_callback(struct notifier_block *nb,
 	case DRM_PANEL_BLANK_LP:
 		if (val == DRM_PANEL_EARLY_EVENT_BLANK) {
 			pr_debug("%s: BLANK\n", __func__);
+#ifdef SUPPORT_PROX_PALM
+			if (info->audio_status)
+				enable_prox_palm_only_mode(true);
+#endif
 			fts_set_bus_ref(info, FTS_BUS_REF_SCREEN_ON, false);
+#ifdef SUPPORT_PROX_PALM
+			release_all_touches(info);
+#endif
 		}
 		break;
 	case DRM_PANEL_BLANK_UNBLANK:
 		if (val == DRM_PANEL_EVENT_BLANK) {
 			pr_debug("%s: UNBLANK\n", __func__);
+#ifdef SUPPORT_PROX_PALM
+			if (info->audio_status)
+				enable_prox_palm_only_mode(false);
+#endif
 			fts_set_bus_ref(info, FTS_BUS_REF_SCREEN_ON, true);
+#ifdef SUPPORT_PROX_PALM
+			release_all_touches(info);
+#endif
 		}
 		break;
 	}
@@ -6008,6 +6165,11 @@ static int fts_pm_suspend(struct device *dev)
 		pr_warn("%s: bus_refmask 0x%X\n", __func__, info->bus_refmask);
 
 	if (info->resume_bit == 1 || info->sensor_sleep == false) {
+#ifdef SUPPORT_PROX_PALM
+		/* Don't block CPU suspend during phone call*/
+		if (info->bus_refmask == FTS_BUS_REF_PHONE_CALL)
+			return 0;
+#endif
 		pr_warn("%s: can't suspend because touch bus is in use!\n",
 			__func__);
 		return -EBUSY;
diff --git a/fts.h b/fts.h
index d5eeff0..410a304 100644
--- a/fts.h
+++ b/fts.h
@@ -308,7 +308,10 @@ enum {
 	FTS_BUS_REF_IRQ			= 0x02,
 	FTS_BUS_REF_FW_UPDATE		= 0x04,
 	FTS_BUS_REF_SYSFS		= 0x08,
-	FTS_BUS_REF_FORCE_ACTIVE	= 0x10
+	FTS_BUS_REF_FORCE_ACTIVE	= 0x10,
+#ifdef SUPPORT_PROX_PALM
+	FTS_BUS_REF_PHONE_CALL		= 0x20,
+#endif
 };
 
 /* Motion filter finite state machine (FSM) states
@@ -472,6 +475,10 @@ struct fts_ts_info {
 #ifdef TOUCHSCREEN_HEATMAP
 	int heatmap_mode;	/* heatmap mode*/
 #endif
+#ifdef SUPPORT_PROX_PALM
+	int audio_status;
+	int prox_palm_status;
+#endif
 	/* Stop changing motion filter and keep fw design */
 	bool use_default_mf;
 	/* Motion filter finite state machine (FSM) state */
diff --git a/fts_lib/ftsCore.c b/fts_lib/ftsCore.c
index fea0941..b073806 100644
--- a/fts_lib/ftsCore.c
+++ b/fts_lib/ftsCore.c
@@ -98,6 +98,10 @@ int fts_system_reset(void)
 	int res = -1;
 	int i;
 	u8 data[1] = { SYSTEM_RESET_VALUE };
+#ifdef SUPPORT_PROX_PALM
+	struct fts_ts_info *info = NULL;
+	info = dev_get_drvdata(&getClient()->dev);
+#endif
 
 	event_to_search = (int)EVT_ID_CONTROLLER_READY;
 
@@ -127,6 +131,9 @@ int fts_system_reset(void)
 				pr_err("fts_system_reset: ERROR %08X\n", res);
 		}
 	}
+#ifdef SUPPORT_PROX_PALM
+	info->prox_palm_status = 0;
+#endif
 	if (res < OK) {
 		pr_err("fts_system_reset...failed after 3 attempts: ERROR %08X\n",
 			(res | ERROR_SYSTEM_RESET_FAIL));
diff --git a/fts_lib/ftsSoftware.h b/fts_lib/ftsSoftware.h
index 0ab1204..8962411 100644
--- a/fts_lib/ftsSoftware.h
+++ b/fts_lib/ftsSoftware.h
@@ -25,6 +25,8 @@
 #include <linux/types.h>
 #include "ftsHardware.h"
 
+#define SUPPORT_PROX_PALM
+
 /* signed type */
 typedef signed char i8;	/* /< basic type that represent one signed byte (or 8
 			 * bits) */
@@ -406,6 +408,9 @@ typedef enum {
 						 * Validation Status */
 #define EVT_TYPE_STATUS_GOLDEN_RAW_ERR	0x16	/* /< Golden Raw
 						 * Data Abnormal */
+#ifdef SUPPORT_PROX_PALM
+#define EVT_TYPE_STATUS_PROX_PALM	0x18	/* /< Proximity: Palm**/
+#endif
 
 /** @} */