HID: hid-multitouch: Send events per slot if CONTACTCOUNT is missing

The recent capacitive DWAV firmwares do not use the CONTACTCOUNT
field, and the touch frame boundary can therefore not be determined.
This patch makes the driver report the touch frame at each completed
slot instead.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 69f8744deac8..4518006f4871 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -364,8 +364,11 @@ static int mt_event(struct hid_device *hid, struct hid_field *field,
                         return 0;
                 }
 
-                if (usage->hid == td->last_slot_field)
+                if (usage->hid == td->last_slot_field) {
                         mt_complete_slot(td);
+                        if (!td->last_field_index)
+                                mt_emit_event(td, field->hidinput->input);
+                }
 
                 if (field->index == td->last_field_index
                         && td->num_received >= td->num_expected)