3 files changed, 5 insertions, 0 deletions

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 866e54ec5fb..b54a9a608ac 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1586,6 +1586,7 @@ static const struct hid_device_id hid_ignore_list[] = {
         { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) },
         { HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) },
         { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC5UH) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC4UM) },
         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0001) },
         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0002) },
         { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 0x0003) },
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 31601eef25d..8aee2577c1a 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -198,6 +198,7 @@
 
 #define USB_VENDOR_ID_ETT               0x0664
 #define USB_DEVICE_ID_TC5UH             0x0309
+#define USB_DEVICE_ID_TC4UM             0x0306
 
 #define USB_VENDOR_ID_EZKEY             0x0518
 #define USB_DEVICE_ID_BTC_8193          0x0002
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 7a0d2e4661a..69d152e16a6 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -534,6 +534,9 @@ mapped:
                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
 
+                /* use a larger default input buffer for MT devices */
+                if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
+                        input_set_events_per_packet(input, 60);
         }
 
         if (usage->type == EV_ABS &&