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-rw-r--r--drivers/hid/hid-multitouch.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index e3382afc74c9..756136f84168 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -1335,6 +1335,13 @@ static int mt_touch_input_configured(struct hid_device *hdev,
struct input_dev *input = hi->input;
int ret;
+ /*
+ * HID_DG_CONTACTMAX field is not present on Apple Touch Bars,
+ * but the maximum contact count is greater than the default.
+ */
+ if (cls->quirks & MT_QUIRK_APPLE_TOUCHBAR && cls->maxcontacts)
+ td->maxcontacts = cls->maxcontacts;
+
if (!td->maxcontacts)
td->maxcontacts = MT_DEFAULT_MAXCONTACT;