* This is true when single_touch_id is equal to NO_TOUCHES. If multiple touches
* are down and the touch providing for single touch emulation is lifted,
* single_touch_id is equal to SINGLE_TOUCH_UP. While single touch emulation is
- * occuring, single_touch_id corresponds with the tracking id of the touch used.
+ * occurring, single_touch_id corresponds with the tracking id of the touch used.
*/
#define NO_TOUCHES -1
#define SINGLE_TOUCH_UP -2
}
report->size = 6;
+ /*
+ * The device reponds with 'invalid report id' when feature
+ * report switching it into multitouch mode is sent to it.
+ *
+ * This results in -EIO from the _raw low-level transport callback,
+ * but there seems to be no other way of switching the mode.
+ * Thus the super-ugly hacky success check below.
+ */
ret = hdev->hid_output_raw_report(hdev, feature, sizeof(feature),
HID_FEATURE_REPORT);
- if (ret != sizeof(feature)) {
+ if (ret != -EIO) {
hid_err(hdev, "unable to request touch data (%d)\n", ret);
goto err_stop_hw;
}