On 12/01/2010 09:21 AM, Henrik Rydberg wrote:
> The drivers using the type B protocol all report tracking information
> the same way. The contact id is semantically equivalent to
> ABS_MT_SLOT, and the handling of ABS_MT_TRACKING_ID only complicates
> the driver. The situation can be improved upon by providing a common
> pointer emulation code, thereby removing the need for the tracking id
> in the driver. This patch moves all tracking event handling over to
> the input core, simplifying both the existing drivers and the ones
> currently in preparation.
When two or more fingers are down, one of the fingers controls
ABS_{X,Y}. I think the aim is to emulate current behavior for
synaptics-style touchpads, which average the position in firmware. Thus,
we should be averaging the touch positions to generate the ABS_{X,Y} values.
-- Chase
--
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
