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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: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2012-11-14 16:59:23 +01:00 committed by Jiri Kosina
parent 29807d1e24
commit 2872839904
1 changed files with 9 additions and 0 deletions
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9
drivers/hid/hid-multitouch.c
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@ -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);