[PATCH v2 20/20] HID: hid-multitouch: Fix contact count on 3M panels

[Henrik Rydberg]

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@xxxxxxx>
Signed-off-by: Henrik Rydberg <rydberg@xxxxxxxxxxx>
---
Benjamin, are you ok with 0x506 being treated this way as well?

Thanks,
Henrik

 drivers/hid/hid-multitouch.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index eee19c9..63f120b 100644
--- 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,
-- 
1.7.12

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