synaptics S3320: bring inline with lineage-15.1

Change-Id: I36d8cbac90add8cccef212eccae7dede9c9b806a

Documentation/input/event-codes.txt

@@ -91,6 +91,11 @@ sent in the evdev event stream.
     event and query the device (using EVIOCG* ioctls) to obtain its
     current state.
 
+* SYN_TIME_SEC, SYN_TIME_NSEC:
+  - Used to report the timestamp from the hardware. The timestamp should record
+    the exact time when the hardware events happens. The timestamp is
+    CLOCK_MONOTONIC based.
+
 EV_KEY:
 ----------
 EV_KEY events take the form KEY_<name> or BTN_<name>. For example, KEY_A is used

drivers/input/input.c

@@ -273,6 +273,8 @@ static int input_get_disposition(struct input_dev *dev,
 	case EV_SYN:
 		switch (code) {
 		case SYN_CONFIG:
+		case SYN_TIME_SEC:
+		case SYN_TIME_NSEC:
 			disposition = INPUT_PASS_TO_ALL;
 			break;
 

drivers/input/touchscreen/synaptics_dsx/synaptics_dsx_core.c

@@ -917,6 +917,11 @@ static int synaptics_rmi4_f11_abs_report(struct synaptics_rmi4_data *rmi4_data,
 	if (retval < 0)
 		return 0;
 
+	input_event(rmi4_data->input_dev, EV_SYN, SYN_TIME_SEC,
+			ktime_to_timespec(rmi4_data->timestamp).tv_sec);
+	input_event(rmi4_data->input_dev, EV_SYN, SYN_TIME_NSEC,
+			ktime_to_timespec(rmi4_data->timestamp).tv_nsec);
+
 	for (finger = 0; finger < fingers_supported; finger++) {
 		reg_index = finger / 4;
 		finger_shift = (finger % 4) * 2;
@@ -1106,6 +1111,11 @@ static int synaptics_rmi4_f12_abs_report(struct synaptics_rmi4_data *rmi4_data,
 
 	data = (struct synaptics_rmi4_f12_finger_data *)fhandler->data;
 
+	input_event(rmi4_data->input_dev, EV_SYN, SYN_TIME_SEC,
+			ktime_to_timespec(rmi4_data->timestamp).tv_sec);
+	input_event(rmi4_data->input_dev, EV_SYN, SYN_TIME_NSEC,
+			ktime_to_timespec(rmi4_data->timestamp).tv_nsec);
+
 	for (finger = 0; finger < fingers_to_process; finger++) {
 		finger_data = data + finger;
 		finger_status = finger_data->object_type_and_status;
@@ -1438,6 +1448,8 @@ static irqreturn_t synaptics_rmi4_irq(int irq, void *data)
 	if (IRQ_HANDLED == synaptics_filter_interrupt(data))
 		return IRQ_HANDLED;
 
+	rmi4_data->timestamp = ktime_get();
+
 	synaptics_rmi4_sensor_report(rmi4_data);
 
 	return IRQ_HANDLED;

drivers/input/touchscreen/synaptics_dsx/synaptics_dsx_core.h

@@ -314,6 +314,7 @@ struct synaptics_rmi4_data {
 	struct clk *core_clk;
 	struct clk *iface_clk;
 #endif
+	ktime_t timestamp;
 };
 
 struct synaptics_dsx_bus_access {

include/uapi/linux/input-event-codes.h

@@ -57,6 +57,8 @@
 #define SYN_CONFIG		1
 #define SYN_MT_REPORT		2
 #define SYN_DROPPED		3
+#define SYN_TIME_SEC	4
+#define SYN_TIME_NSEC	5
 #define SYN_MAX			0xf
 #define SYN_CNT			(SYN_MAX+1)