Merge branch 'for-4.18/multitouch' into for-linus

- improvement of duplicate usage handling in hid-input from Benjamin Tissoires
- Win 8.1 precisioun touchpad spec implementation from Benjamin Tissoires

7 files changed, 281 insertions, 134 deletions

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 720be70ae74a..355dc7e49562 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -57,7 +57,9 @@ MODULE_PARM_DESC(ignore_special_drivers, "Ignore any special drivers and handle
  * Register a new report for a device.
  */
 
-struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id)
+struct hid_report *hid_register_report(struct hid_device *device,
+				       unsigned int type, unsigned int id,
+				       unsigned int application)
 {
 	struct hid_report_enum *report_enum = device->report_enum + type;
 	struct hid_report *report;
@@ -78,6 +80,7 @@ struct hid_report *hid_register_report(struct hid_device *device, unsigned type,
 	report->type = type;
 	report->size = 0;
 	report->device = device;
+	report->application = application;
 	report_enum->report_id_hash[id] = report;
 
 	list_add_tail(&report->list, &report_enum->report_list);
@@ -221,11 +224,15 @@ static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsign
 {
 	struct hid_report *report;
 	struct hid_field *field;
-	unsigned usages;
-	unsigned offset;
-	unsigned i;
+	unsigned int usages;
+	unsigned int offset;
+	unsigned int i;
+	unsigned int application;
+
+	application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
 
-	report = hid_register_report(parser->device, report_type, parser->global.report_id);
+	report = hid_register_report(parser->device, report_type,
+				     parser->global.report_id, application);
 	if (!report) {
 		hid_err(parser->device, "hid_register_report failed\n");
 		return -1;
@@ -259,7 +266,7 @@ static int hid_add_field(struct hid_parser *parser, unsigned report_type, unsign
 
 	field->physical = hid_lookup_collection(parser, HID_COLLECTION_PHYSICAL);
 	field->logical = hid_lookup_collection(parser, HID_COLLECTION_LOGICAL);
-	field->application = hid_lookup_collection(parser, HID_COLLECTION_APPLICATION);
+	field->application = application;
 
 	for (i = 0; i < usages; i++) {
 		unsigned j = i;
diff --git a/drivers/hid/hid-generic.c b/drivers/hid/hid-generic.c
index c25b4718de44..3b6eccbc2519 100644
--- a/drivers/hid/hid-generic.c
+++ b/drivers/hid/hid-generic.c
@@ -56,6 +56,20 @@ static bool hid_generic_match(struct hid_device *hdev,
 	return true;
 }
 
+static int hid_generic_probe(struct hid_device *hdev,
+			     const struct hid_device_id *id)
+{
+	int ret;
+
+	hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
+
+	ret = hid_parse(hdev);
+	if (ret)
+		return ret;
+
+	return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+}
+
 static const struct hid_device_id hid_table[] = {
 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, HID_ANY_ID, HID_ANY_ID) },
 	{ }
@@ -66,6 +80,7 @@ static struct hid_driver hid_generic = {
 	.name = "hid-generic",
 	.id_table = hid_table,
 	.match = hid_generic_match,
+	.probe = hid_generic_probe,
 };
 module_hid_driver(hid_generic);
 
diff --git a/drivers/hid/hid-gfrm.c b/drivers/hid/hid-gfrm.c
index 075b1c020846..cf477f8c8f4c 100644
--- a/drivers/hid/hid-gfrm.c
+++ b/drivers/hid/hid-gfrm.c
@@ -116,7 +116,7 @@ static int gfrm_probe(struct hid_device *hdev, const struct hid_device_id *id)
 		 * those reports reach gfrm_raw_event() from hid_input_report().
 		 */
 		if (!hid_register_report(hdev, HID_INPUT_REPORT,
-					 GFRM100_SEARCH_KEY_REPORT_ID)) {
+					 GFRM100_SEARCH_KEY_REPORT_ID, 0)) {
 			ret = -ENOMEM;
 			goto done;
 		}
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 930652c25120..ab93dd5927c3 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1110,8 +1110,31 @@ mapped:
 
 	set_bit(usage->type, input->evbit);
 
-	while (usage->code <= max && test_and_set_bit(usage->code, bit))
-		usage->code = find_next_zero_bit(bit, max + 1, usage->code);
+	/*
+	 * This part is *really* controversial:
+	 * - HID aims at being generic so we should do our best to export
+	 *   all incoming events
+	 * - HID describes what events are, so there is no reason for ABS_X
+	 *   to be mapped to ABS_Y
+	 * - HID is using *_MISC+N as a default value, but nothing prevents
+	 *   *_MISC+N to overwrite a legitimate even, which confuses userspace
+	 *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
+	 *   processing)
+	 *
+	 * If devices still want to use this (at their own risk), they will
+	 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
+	 * the default should be a reliable mapping.
+	 */
+	while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
+		if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
+			usage->code = find_next_zero_bit(bit,
+							 max + 1,
+							 usage->code);
+		} else {
+			device->status |= HID_STAT_DUP_DETECTED;
+			goto ignore;
+		}
+	}
 
 	if (usage->code > max)
 		goto ignore;
@@ -1487,15 +1510,56 @@ static void report_features(struct hid_device *hid)
 		}
 }
 
-static struct hid_input *hidinput_allocate(struct hid_device *hid)
+static struct hid_input *hidinput_allocate(struct hid_device *hid,
+					   unsigned int application)
 {
 	struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
 	struct input_dev *input_dev = input_allocate_device();
-	if (!hidinput || !input_dev) {
-		kfree(hidinput);
-		input_free_device(input_dev);
-		hid_err(hid, "Out of memory during hid input probe\n");
-		return NULL;
+	const char *suffix = NULL;
+
+	if (!hidinput || !input_dev)
+		goto fail;
+
+	if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
+	    hid->maxapplication > 1) {
+		switch (application) {
+		case HID_GD_KEYBOARD:
+			suffix = "Keyboard";
+			break;
+		case HID_GD_KEYPAD:
+			suffix = "Keypad";
+			break;
+		case HID_GD_MOUSE:
+			suffix = "Mouse";
+			break;
+		case HID_DG_STYLUS:
+			suffix = "Pen";
+			break;
+		case HID_DG_TOUCHSCREEN:
+			suffix = "Touchscreen";
+			break;
+		case HID_DG_TOUCHPAD:
+			suffix = "Touchpad";
+			break;
+		case HID_GD_SYSTEM_CONTROL:
+			suffix = "System Control";
+			break;
+		case HID_CP_CONSUMER_CONTROL:
+			suffix = "Consumer Control";
+			break;
+		case HID_GD_WIRELESS_RADIO_CTLS:
+			suffix = "Wireless Radio Control";
+			break;
+		default:
+			break;
+		}
+	}
+
+	if (suffix) {
+		hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
+					   hid->name, suffix);
+		if (!hidinput->name)
+			goto fail;
 	}
 
 	input_set_drvdata(input_dev, hid);
@@ -1505,7 +1569,7 @@ static struct hid_input *hidinput_allocate(struct hid_device *hid)
 	input_dev->setkeycode = hidinput_setkeycode;
 	input_dev->getkeycode = hidinput_getkeycode;
 
-	input_dev->name = hid->name;
+	input_dev->name = hidinput->name ? hidinput->name : hid->name;
 	input_dev->phys = hid->phys;
 	input_dev->uniq = hid->uniq;
 	input_dev->id.bustype = hid->bus;
@@ -1513,10 +1577,19 @@ static struct hid_input *hidinput_allocate(struct hid_device *hid)
 	input_dev->id.product = hid->product;
 	input_dev->id.version = hid->version;
 	input_dev->dev.parent = &hid->dev;
+
 	hidinput->input = input_dev;
 	list_add_tail(&hidinput->list, &hid->inputs);
 
+	INIT_LIST_HEAD(&hidinput->reports);
+
 	return hidinput;
+
+fail:
+	kfree(hidinput);
+	input_free_device(input_dev);
+	hid_err(hid, "Out of memory during hid input probe\n");
+	return NULL;
 }
 
 static bool hidinput_has_been_populated(struct hid_input *hidinput)
@@ -1562,6 +1635,7 @@ static void hidinput_cleanup_hidinput(struct hid_device *hid,
 
 	list_del(&hidinput->list);
 	input_free_device(hidinput->input);
+	kfree(hidinput->name);
 
 	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
 		if (k == HID_OUTPUT_REPORT &&
@@ -1594,6 +1668,20 @@ static struct hid_input *hidinput_match(struct hid_report *report)
 	return NULL;
 }
 
+static struct hid_input *hidinput_match_application(struct hid_report *report)
+{
+	struct hid_device *hid = report->device;
+	struct hid_input *hidinput;
+
+	list_for_each_entry(hidinput, &hid->inputs, list) {
+		if (hidinput->report &&
+		    hidinput->report->application == report->application)
+			return hidinput;
+	}
+
+	return NULL;
+}
+
 static inline void hidinput_configure_usages(struct hid_input *hidinput,
 					     struct hid_report *report)
 {
@@ -1616,11 +1704,14 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
 	struct hid_driver *drv = hid->driver;
 	struct hid_report *report;
 	struct hid_input *next, *hidinput = NULL;
+	unsigned int application;
 	int i, k;
 
 	INIT_LIST_HEAD(&hid->inputs);
 	INIT_WORK(&hid->led_work, hidinput_led_worker);
 
+	hid->status &= ~HID_STAT_DUP_DETECTED;
+
 	if (!force) {
 		for (i = 0; i < hid->maxcollection; i++) {
 			struct hid_collection *col = &hid->collection[i];
@@ -1646,15 +1737,20 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
 			if (!report->maxfield)
 				continue;
 
+			application = report->application;
+
 			/*
 			 * Find the previous hidinput report attached
 			 * to this report id.
 			 */
 			if (hid->quirks & HID_QUIRK_MULTI_INPUT)
 				hidinput = hidinput_match(report);
+			else if (hid->maxapplication > 1 &&
+				 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
+				hidinput = hidinput_match_application(report);
 
 			if (!hidinput) {
-				hidinput = hidinput_allocate(hid);
+				hidinput = hidinput_allocate(hid, application);
 				if (!hidinput)
 					goto out_unwind;
 			}
@@ -1663,6 +1759,9 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
 
 			if (hid->quirks & HID_QUIRK_MULTI_INPUT)
 				hidinput->report = report;
+
+			list_add_tail(&report->hidinput_list,
+				      &hidinput->reports);
 		}
 	}
 
@@ -1687,6 +1786,10 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
 		goto out_unwind;
 	}
 
+	if (hid->status & HID_STAT_DUP_DETECTED)
+		hid_dbg(hid,
+			"Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
+
 	return 0;
 
 out_unwind:
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index 42ed887ba0be..b454c4386157 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -531,12 +531,12 @@ static int magicmouse_probe(struct hid_device *hdev,
 
 	if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE)
 		report = hid_register_report(hdev, HID_INPUT_REPORT,
-			MOUSE_REPORT_ID);
+			MOUSE_REPORT_ID, 0);
 	else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 		report = hid_register_report(hdev, HID_INPUT_REPORT,
-			TRACKPAD_REPORT_ID);
+			TRACKPAD_REPORT_ID, 0);
 		report = hid_register_report(hdev, HID_INPUT_REPORT,
-			DOUBLE_REPORT_ID);
+			DOUBLE_REPORT_ID, 0);
 	}
 
 	if (!report) {
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index dad2fbb0e3f8..45968f7970f8 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -81,6 +81,11 @@ MODULE_LICENSE("GPL");
 
 #define MT_BUTTONTYPE_CLICKPAD		0
 
+enum latency_mode {
+	HID_LATENCY_NORMAL = 0,
+	HID_LATENCY_HIGH = 1,
+};
+
 #define MT_IO_FLAGS_RUNNING		0
 #define MT_IO_FLAGS_ACTIVE_SLOTS	1
 #define MT_IO_FLAGS_PENDING_SLOTS	2
@@ -127,11 +132,7 @@ struct mt_device {
 	int left_button_state;	/* left button state */
 	unsigned last_slot_field;	/* the last field of a slot */
 	unsigned mt_report_id;	/* the report ID of the multitouch device */
-	__s16 inputmode;	/* InputMode HID feature, -1 if non-existent */
-	__s16 inputmode_index;	/* InputMode HID feature index in the report */
-	__s16 maxcontact_report_id;	/* Maximum Contact Number HID feature,
-				   -1 if non-existent */
-	__u8 inputmode_value;  /* InputMode HID feature value */
+	__u8 inputmode_value;	/* InputMode HID feature value */
 	__u8 num_received;	/* how many contacts we received */
 	__u8 num_expected;	/* expected last contact index */
 	__u8 maxcontacts;
@@ -415,32 +416,9 @@ static void mt_feature_mapping(struct hid_device *hdev,
 	struct mt_device *td = hid_get_drvdata(hdev);
 
 	switch (usage->hid) {
-	case HID_DG_INPUTMODE:
-		/* Ignore if value index is out of bounds. */
-		if (usage->usage_index >= field->report_count) {
-			dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
-			break;
-		}
-
-		if (td->inputmode < 0) {
-			td->inputmode = field->report->id;
-			td->inputmode_index = usage->usage_index;
-		} else {
-			/*
-			 * Some elan panels wrongly declare 2 input mode
-			 * features, and silently ignore when we set the
-			 * value in the second field. Skip the second feature
-			 * and hope for the best.
-			 */
-			dev_info(&hdev->dev,
-				 "Ignoring the extra HID_DG_INPUTMODE\n");
-		}
-
-		break;
 	case HID_DG_CONTACTMAX:
 		mt_get_feature(hdev, field->report);
 
-		td->maxcontact_report_id = field->report->id;
 		td->maxcontacts = field->value[0];
 		if (!td->maxcontacts &&
 		    field->logical_maximum <= MT_MAX_MAXCONTACT)
@@ -620,13 +598,16 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 			hid_map_usage(hi, usage, bit, max,
 				EV_MSC, MSC_TIMESTAMP);
 			input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
-			mt_store_field(usage, td, hi);
 			/* Ignore if indexes are out of bounds. */
 			if (field->index >= field->report->maxfield ||
 			    usage->usage_index >= field->report_count)
 				return 1;
 			td->scantime_index = field->index;
 			td->scantime_val_index = usage->usage_index;
+			/*
+			 * We don't set td->last_slot_field as scan time is
+			 * global to the report.
+			 */
 			return 1;
 		case HID_DG_CONTACTCOUNT:
 			/* Ignore if indexes are out of bounds. */
@@ -1181,61 +1162,100 @@ static void mt_report(struct hid_device *hid, struct hid_report *report)
 		input_sync(field->hidinput->input);
 }
 
-static void mt_set_input_mode(struct hid_device *hdev)
+static bool mt_need_to_apply_feature(struct hid_device *hdev,
+				     struct hid_field *field,
+				     struct hid_usage *usage,
+				     enum latency_mode latency,
+				     bool surface_switch,
+				     bool button_switch)
 {
 	struct mt_device *td = hid_get_drvdata(hdev);
-	struct hid_report *r;
-	struct hid_report_enum *re;
 	struct mt_class *cls = &td->mtclass;
+	struct hid_report *report = field->report;
+	unsigned int index = usage->usage_index;
 	char *buf;
 	u32 report_len;
+	int max;
 
-	if (td->inputmode < 0)
-		return;
-
-	re = &(hdev->report_enum[HID_FEATURE_REPORT]);
-	r = re->report_id_hash[td->inputmode];
-	if (r) {
+	switch (usage->hid) {
+	case HID_DG_INPUTMODE:
 		if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
-			report_len = hid_report_len(r);
-			buf = hid_alloc_report_buf(r, GFP_KERNEL);
+			report_len = hid_report_len(report);
+			buf = hid_alloc_report_buf(report, GFP_KERNEL);
 			if (!buf) {
-				hid_err(hdev, "failed to allocate buffer for report\n");
-				return;
+				hid_err(hdev,
+					"failed to allocate buffer for report\n");
+				return false;
 			}
-			hid_hw_raw_request(hdev, r->id, buf, report_len,
+			hid_hw_raw_request(hdev, report->id, buf, report_len,
 					   HID_FEATURE_REPORT,
 					   HID_REQ_GET_REPORT);
 			kfree(buf);
 		}
-		r->field[0]->value[td->inputmode_index] = td->inputmode_value;
-		hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
-	}
-}
 
-static void mt_set_maxcontacts(struct hid_device *hdev)
-{
-	struct mt_device *td = hid_get_drvdata(hdev);
-	struct hid_report *r;
-	struct hid_report_enum *re;
-	int fieldmax, max;
+		field->value[index] = td->inputmode_value;
+		return true;
 
-	if (td->maxcontact_report_id < 0)
-		return;
+	case HID_DG_CONTACTMAX:
+		if (td->mtclass.maxcontacts) {
+			max = min_t(int, field->logical_maximum,
+				    td->mtclass.maxcontacts);
+			if (field->value[index] != max) {
+				field->value[index] = max;
+				return true;
+			}
+		}
+		break;
 
-	if (!td->mtclass.maxcontacts)
-		return;
+	case HID_DG_LATENCYMODE:
+		field->value[index] = latency;
+		return true;
+
+	case HID_DG_SURFACESWITCH:
+		field->value[index] = surface_switch;
+		return true;
+
+	case HID_DG_BUTTONSWITCH:
+		field->value[index] = button_switch;
+		return true;
+	}
 
-	re = &hdev->report_enum[HID_FEATURE_REPORT];
-	r = re->report_id_hash[td->maxcontact_report_id];
-	if (r) {
-		max = td->mtclass.maxcontacts;
-		fieldmax = r->field[0]->logical_maximum;
-		max = min(fieldmax, max);
-		if (r->field[0]->value[0] != max) {
-			r->field[0]->value[0] = max;
-			hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
+	return false; /* no need to update the report */
+}
+
+static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
+			 bool surface_switch, bool button_switch)
+{
+	struct hid_report_enum *rep_enum;
+	struct hid_report *rep;
+	struct hid_usage *usage;
+	int i, j;
+	bool update_report;
+
+	rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
+	list_for_each_entry(rep, &rep_enum->report_list, list) {
+		update_report = false;
+
+		for (i = 0; i < rep->maxfield; i++) {
+			/* Ignore if report count is out of bounds. */
+			if (rep->field[i]->report_count < 1)
+				continue;
+
+			for (j = 0; j < rep->field[i]->maxusage; j++) {
+				usage = &rep->field[i]->usage[j];
+
+				if (mt_need_to_apply_feature(hdev,
+							     rep->field[i],
+							     usage,
+							     latency,
+							     surface_switch,
+							     button_switch))
+					update_report = true;
+			}
 		}
+
+		if (update_report)
+			hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
 	}
 }
 
@@ -1274,54 +1294,48 @@ static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
 	struct mt_device *td = hid_get_drvdata(hdev);
 	char *name;
 	const char *suffix = NULL;
-	struct hid_field *field = hi->report->field[0];
+	unsigned int application = 0;
+	struct hid_report *report;
 	int ret;
 
-	if (hi->report->id == td->mt_report_id) {
-		ret = mt_touch_input_configured(hdev, hi);
-		if (ret)
-			return ret;
+	list_for_each_entry(report, &hi->reports, hidinput_list) {
+		application = report->application;
+		if (report->id == td->mt_report_id) {
+			ret = mt_touch_input_configured(hdev, hi);
+			if (ret)
+				return ret;
+		}
+
+		/*
+		 * some egalax touchscreens have "application == DG_TOUCHSCREEN"
+		 * for the stylus. Check this first, and then rely on
+		 * the application field.
+		 */
+		if (report->field[0]->physical == HID_DG_STYLUS) {
+			suffix = "Pen";
+			/* force BTN_STYLUS to allow tablet matching in udev */
+			__set_bit(BTN_STYLUS, hi->input->keybit);
+		}
 	}
 
-	/*
-	 * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
-	 * for the stylus. Check this first, and then rely on the application
-	 * field.
-	 */
-	if (hi->report->field[0]->physical == HID_DG_STYLUS) {
-		suffix = "Pen";
-		/* force BTN_STYLUS to allow tablet matching in udev */
-		__set_bit(BTN_STYLUS, hi->input->keybit);
-	} else {
-		switch (field->application) {
+	if (!suffix) {
+		switch (application) {
 		case HID_GD_KEYBOARD:
-			suffix = "Keyboard";
-			break;
 		case HID_GD_KEYPAD:
-			suffix = "Keypad";
-			break;
 		case HID_GD_MOUSE:
-			suffix = "Mouse";
-			break;
-		case HID_DG_STYLUS:
-			suffix = "Pen";
-			/* force BTN_STYLUS to allow tablet matching in udev */
-			__set_bit(BTN_STYLUS, hi->input->keybit);
-			break;
-		case HID_DG_TOUCHSCREEN:
-			/* we do not set suffix = "Touchscreen" */
-			break;
 		case HID_DG_TOUCHPAD:
-			suffix = "Touchpad";
-			break;
 		case HID_GD_SYSTEM_CONTROL:
-			suffix = "System Control";
-			break;
 		case HID_CP_CONSUMER_CONTROL:
-			suffix = "Consumer Control";
-			break;
 		case HID_GD_WIRELESS_RADIO_CTLS:
-			suffix = "Wireless Radio Control";
+			/* already handled by hid core */
+			break;
+		case HID_DG_TOUCHSCREEN:
+			/* we do not set suffix = "Touchscreen" */
+			hi->input->name = hdev->name;
+			break;
+		case HID_DG_STYLUS:
+			/* force BTN_STYLUS to allow tablet matching in udev */
+			__set_bit(BTN_STYLUS, hi->input->keybit);
 			break;
 		case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
 			suffix = "Custom Media Keys";
@@ -1434,8 +1448,6 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	}
 	td->hdev = hdev;
 	td->mtclass = *mtclass;
-	td->inputmode = -1;
-	td->maxcontact_report_id = -1;
 	td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
 	td->cc_index = -1;
 	td->scantime_index = -1;
@@ -1459,10 +1471,10 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 
 	/*
 	 * This allows the driver to handle different input sensors
-	 * that emits events through different reports on the same HID
+	 * that emits events through different applications on the same HID
 	 * device.
 	 */
-	hdev->quirks |= HID_QUIRK_MULTI_INPUT;
+	hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
 
 	timer_setup(&td->release_timer, mt_expired_timeout, 0);
 
@@ -1482,8 +1494,7 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 		dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
 				hdev->name);
 
-	mt_set_maxcontacts(hdev);
-	mt_set_input_mode(hdev);
+	mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
 
 	/* release .fields memory as it is not used anymore */
 	devm_kfree(&hdev->dev, td->fields);
@@ -1496,8 +1507,7 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 static int mt_reset_resume(struct hid_device *hdev)
 {
 	mt_release_contacts(hdev);
-	mt_set_maxcontacts(hdev);
-	mt_set_input_mode(hdev);
+	mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
 	return 0;
 }
 
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 08d92bb005fd..41a3d5775394 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -292,9 +292,12 @@ struct hid_item {
 #define HID_DG_CONTACTCOUNT	0x000d0054
 #define HID_DG_CONTACTMAX	0x000d0055
 #define HID_DG_SCANTIME		0x000d0056
+#define HID_DG_SURFACESWITCH	0x000d0057
+#define HID_DG_BUTTONSWITCH	0x000d0058
 #define HID_DG_BUTTONTYPE	0x000d0059
 #define HID_DG_BARRELSWITCH2	0x000d005a
 #define HID_DG_TOOLSERIALNUMBER	0x000d005b
+#define HID_DG_LATENCYMODE	0x000d0060
 
 #define HID_VD_ASUS_CUSTOM_MEDIA_KEYS	0xff310076
 /*
@@ -341,10 +344,12 @@ struct hid_item {
 /* BIT(8) reserved for backward compatibility, was HID_QUIRK_NO_EMPTY_INPUT */
 /* BIT(9) reserved for backward compatibility, was NO_INIT_INPUT_REPORTS */
 #define HID_QUIRK_ALWAYS_POLL			BIT(10)
+#define HID_QUIRK_INPUT_PER_APP			BIT(11)
 #define HID_QUIRK_SKIP_OUTPUT_REPORTS		BIT(16)
 #define HID_QUIRK_SKIP_OUTPUT_REPORT_ID		BIT(17)
 #define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP	BIT(18)
 #define HID_QUIRK_HAVE_SPECIAL_DRIVER		BIT(19)
+#define HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE	BIT(20)
 #define HID_QUIRK_FULLSPEED_INTERVAL		BIT(28)
 #define HID_QUIRK_NO_INIT_REPORTS		BIT(29)
 #define HID_QUIRK_NO_IGNORE			BIT(30)
@@ -464,8 +469,10 @@ struct hid_field {
 
 struct hid_report {
 	struct list_head list;
-	unsigned id;					/* id of this report */
-	unsigned type;					/* report type */
+	struct list_head hidinput_list;
+	unsigned int id;				/* id of this report */
+	unsigned int type;				/* report type */
+	unsigned int application;			/* application usage for this report */
 	struct hid_field *field[HID_MAX_FIELDS];	/* fields of the report */
 	unsigned maxfield;				/* maximum valid field index */
 	unsigned size;					/* size of the report (bits) */
@@ -503,12 +510,15 @@ struct hid_output_fifo {
 
 #define HID_STAT_ADDED		BIT(0)
 #define HID_STAT_PARSED		BIT(1)
+#define HID_STAT_DUP_DETECTED	BIT(2)
 
 struct hid_input {
 	struct list_head list;
 	struct hid_report *report;
 	struct input_dev *input;
+	const char *name;
 	bool registered;
+	struct list_head reports;	/* the list of reports */
 };
 
 enum hid_type {
@@ -865,7 +875,9 @@ void hid_output_report(struct hid_report *report, __u8 *data);
 void __hid_request(struct hid_device *hid, struct hid_report *rep, int reqtype);
 u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
 struct hid_device *hid_allocate_device(void);
-struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
+struct hid_report *hid_register_report(struct hid_device *device,
+				       unsigned int type, unsigned int id,
+				       unsigned int application);
 int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
 struct hid_report *hid_validate_values(struct hid_device *hid,
 				       unsigned int type, unsigned int id,