HID: hid-multitouch: Fix contact count on 3M panels

Some devices report the number of contacts via the unreliable
CONTACTCOUNT usage, rather than using the CONTACTMAX feature.
Without this patch, the 3M devices are constrained to the default
maximum of ten fingers.

Cc: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index eee19c9..63f120b 100644 (file)
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -171,7 +171,9 @@ static struct mt_class mt_classes[] = {
                        MT_QUIRK_SLOT_IS_CONTACTID,
                .sn_move = 2048,
                .sn_width = 128,
-               .sn_height = 128 },
+               .sn_height = 128,
+               .maxcontacts = 60,
+       },
        { .name = MT_CLS_CYPRESS,
                .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
                        MT_QUIRK_CYPRESS,