Re: Sitronix ST9RM01 multitouch panel

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Le 28 sept. 10 à 20:24, Henrik Rydberg a écrit :


+			return 1;
+		case HID_DG_CONTACTID:
+			hid_map_usage(hi, usage, bit, max,
+					EV_ABS, ABS_MT_TRACKING_ID);


This usage of ABS_MT_TRACKING_ID is not ideal. The HID contact id normally maps to a slot number, which suggests the MT slots protocol be used instead.

I'm working on a slot-based version of the Stantum driver, and have had a look into this. The Stantum firmware actually cycles over 8-bit values for its ContactID. In this, it conforms more to the definition you gave for ABS_MT_TRACKING_ID ("The slot protocol requires the use of the ABS_MT_TRACKING_ID, either provided by the hardware or computed from the raw data [5]") than to a slot number, doesn't it? Nevertheless, given our recent exchanges about the 3M driver, I planned to use the driver's own tracking ID.

Your thoughts?

St.







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