On 08/28/2010 05:56 PM, Stéphane Chatty wrote: > > Le 28 août 10 à 16:29, Henrik Rydberg a écrit : > >> The current code sometimes misses to report the last BTN_TOUCH event >> when multiple fingers are lifted simultaneously. With the >> introduction of MT slots, the tracking id is available to determine >> the oldest active contact. > > Hi Henrik, > > good job on exploiting the sync quirk! > > About the oldest active contact, I'm not so sure though. I don't have the device > with me but I remember that 3M recycle IDs, giving the lowest available ID to > any new finger; this means that the lowest ID is not always the oldest finger. Hi Stéphane, I think we use the term tracking id differently here. The HID_DG_CONTACTID is actually the slot id, and the tracking id is a sequential number, increased whenever the touch is new. I believe the patchset works correctly as long as there is less than 32768 new touches before releasing the oldest one. :-) Cheers, Henrik -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
