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Commit 28728399 authored by Benjamin Tissoires's avatar Benjamin Tissoires Committed by Jiri Kosina
Browse files

HID: multitouch: add MT_QUIRK_IGNORE_DUPLICATES 



This quirk allows a device to reuse a contact id when sending garbage
inactive contacts at the end of a report.

Signed-off-by: default avatarBenjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: default avatarHenrik Rydberg <rydberg@euromail.se>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 29807d1e

drivers/hid/hid-multitouch.c

+9 −0
Original line number Diff line number Diff line
@@ -52,6 +52,7 @@ MODULE_LICENSE("GPL"); 
#define MT_QUIRK_VALID_IS_CONFIDENCE	(1 << 6)

#define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE	(1 << 8)

#define MT_QUIRK_NO_AREA		(1 << 9)

#define MT_QUIRK_IGNORE_DUPLICATES	(1 << 10)



struct mt_slot {

	__s32 x, y, cx, cy, p, w, h;
@@ -505,10 +506,18 @@ static void mt_complete_slot(struct mt_device *td, struct input_dev *input) 
	if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {

		int slotnum = mt_compute_slot(td, input);

		struct mt_slot *s = &td->curdata;

		struct input_mt *mt = input->mt;



		if (slotnum < 0 || slotnum >= td->maxcontacts)

			return;



		if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {

			struct input_mt_slot *slot = &mt->slots[slotnum];

			if (input_mt_is_active(slot) &&

			    input_mt_is_used(mt, slot))

				return;

		}



		input_mt_slot(input, slotnum);

		input_mt_report_slot_state(input, MT_TOOL_FINGER,

			s->touch_state);