Merge branch 'for-6.4' into 'master'

Author: jigpu

4.5/wacom_wac.c

@@ -1318,6 +1318,11 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
 
 	struct input_dev *pen_input = wacom->pen_input;
 	unsigned char *data = wacom->data;
+	int number_of_valid_frames = 0;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,4,0)
+	int time_interval = 15000000;
+	ktime_t time_packet_received = ktime_get();
+#endif
 	int i;
 
 	if (wacom->features.type == INTUOSP2_BT ||
@@ -1338,12 +1343,34 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
 		wacom->id[0] |= (wacom->serial[0] >> 32) & 0xFFFFF;
 	}
 
+	/* number of valid frames */
 	for (i = 0; i < pen_frames; i++) {
 		unsigned char *frame = &data[i*pen_frame_len + 1];
 		bool valid = frame[0] & 0x80;
+
+		if (valid)
+			number_of_valid_frames++;
+	}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,4,0)
+	if (number_of_valid_frames) {
+		if (wacom->hid_data.time_delayed)
+			time_interval = ktime_get() - wacom->hid_data.time_delayed;
+		time_interval /= number_of_valid_frames;
+		wacom->hid_data.time_delayed = time_packet_received;
+	}
+#endif
+
+	for (i = 0; i < number_of_valid_frames; i++) {
+		unsigned char *frame = &data[i*pen_frame_len + 1];
+		bool valid = frame[0] & 0x80;
 		bool prox = frame[0] & 0x40;
 		bool range = frame[0] & 0x20;
 		bool invert = frame[0] & 0x10;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,4,0)
+		int frames_number_reversed = number_of_valid_frames - i - 1;
+		int event_timestamp = time_packet_received - frames_number_reversed * time_interval;
+#endif
 
 		if (!valid)
 			continue;
@@ -1356,6 +1383,7 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
 			wacom->tool[0] = 0;
 			wacom->id[0] = 0;
 			wacom->serial[0] = 0;
+			wacom->hid_data.time_delayed = 0;
 			return;
 		}
 
@@ -1392,6 +1420,7 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
 						 get_unaligned_le16(&frame[11]));
 			}
 		}
+
 		if (wacom->tool[0]) {
 			input_report_abs(pen_input, ABS_PRESSURE, get_unaligned_le16(&frame[5]));
 			if (wacom->features.type == INTUOSP2_BT ||
@@ -1415,6 +1444,10 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
 
 		wacom->shared->stylus_in_proximity = prox;
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,4,0)
+		/* add timestamp to unpack the frames */
+		input_set_timestamp(pen_input, event_timestamp);
+#endif
 		input_sync(pen_input);
 	}
 }
@@ -1905,6 +1938,7 @@ static void wacom_map_usage(struct input_dev *input, struct hid_usage *usage,
 	int fmax = field->logical_maximum;
 	unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
 	int resolution_code = code;
+	int resolution = hidinput_calc_abs_res(field, resolution_code);
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)
 	if (equivalent_usage == HID_DG_TWIST) {
@@ -1930,8 +1964,16 @@ static void wacom_map_usage(struct input_dev *input, struct hid_usage *usage,
 	switch (type) {
 	case EV_ABS:
 		input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
-		input_abs_set_res(input, code,
-				  hidinput_calc_abs_res(field, resolution_code));
+
+		/* older tablet may miss physical usage */
+		if ((code == ABS_X || code == ABS_Y) && !resolution) {
+			resolution = WACOM_INTUOS_RES;
+			hid_warn(input,
+				 "Wacom usage (%d) missing resolution \n",
+				 code);
+		}
+		input_abs_set_res(input, code, resolution);
+ 		break;
 		break;
 	case EV_KEY:
 	case EV_MSC:

4.5/wacom_wac.h

@@ -348,6 +348,7 @@ struct hid_data {
 	int ps_connected;
 	bool pad_input_event_flag;
 	unsigned short sequence_number;
+	int time_delayed;
 };
 
 struct wacom_remote_data {