Re: Dual touchscreen implementation

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

Hi Dan,

On Tue, Aug 17, 2010 at 09:06:00AM -0500, Murphy, Dan wrote:
> Abraham
>
> My thoughts would be similar to Dmitry's.  We should let the user
> space figure it out.  Then the application itself can combine and
> render the touches as a contiguous touch screen or as an independent
> touch.
> 
> But we would probably need a way for the kernel driver to identify
> which touch controller that the information came from.
> 
> For multi touch we may be able to use ABS_MT_TRACKING_ID for passing
> up the controller ID but there is not really a good code for the
> standard ABS axes.  Maybe we can make one called ABS_TRACKING_ID to
> keep with the theme.
> 
> This way the user space and use that to know where it came from.
> 
> Or Dmitry if you have any patches or thoughts let me know.
> 

I am confused - you should have 2 device nodes for each pf your
controllers and so you should be able to figure out what device
particular event is coming from. What am I missing here?

Thanks.

-- 
Dmitry