Op 05-05-10 20:26, Henrik Rydberg schreef: > Éric Piel wrote: : >> Let me give you some more details. From what is seems, the hardware can >> reports the width of a touch, but only when there is one single touch. >> So far we report it via ABS_TOOL_WIDTH. When there is 2 or 3 touches, >> the width is unknown. So the precise question is: >> Should we report also ABS_MT_TOUCH_MAJOR in addition to ABS_TOOL_WIDTH, >> whenever it is known (ie: one finger), or just not bother and only >> report ABS_TOOL_WIDTH? > > With only partial information available it will not be of much use anyway, so > omitting ABS_MT_TOUCH is probably best. The ABS_TOOL_WIDTH will most likely not > be used by a driver either (it wont in the Multitouch X Driver anyways). The > synaptics driver cares for palm detection, but the scale has to be very specific > to work properly (i.e., requires testing with synaptics to be useful). Thanks for clarifying! BTW, does anyone know a graphical app which reads the MT events from a /dev/input/eventX device and displays them as points in a window? That would be rather helpful to reverse-engineer/debug multitouch hardwares. Eric -- 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
