RE: Dual touchscreen implementation

["Arce, Abraham" <x0066660@ti.com>]

Hi Dmitry,

> From: Dmitry Torokhov [mailto:dmitry.torokhov@gmail.com]
> 
> > I am working in a board with dual display/touchscreen. I have searched
> within drivers/input/touchscreen for some examples on how to implement the
> functionality to configure driver and behave as a single touchscreen if 2
> sensors are present, no specific example found
> >
> > My idea is to create an attribute "virtualized" to enable/disable
> virtualization in the second touchscreen
> >
> > + static DEVICE_ATTR(virtualized, S_IRUGO | S_IWUSR,
> > + 		   syn_show_attr_virtualized, syn_store_attr_virtualized);
> >
> >
> > In the function which reports the values to input subsystem we can then
> decide to make the second one as an extension of the first touchscreen if
> >
> > * virtualized is set to 1
> > * and touchscreen sensor is the second one
> >
> >
> >  + if (ts->virtualized && dev_name(&sensor->dev == '2')
> >  +	data->x = ts->touch_caps.max_x + d->x;
> >  [..]
> >  + input_report_abs(idev, ABS_x, data->x);
> >
> >
> > I'd appreciate any comments on this approach...
> >
> 
> Does the kernel have to do that? I'd say it is userspace task to
> [re]interpret events.

That was a first thinking however your point makes more sense. I'll explore and get more information on how Ubuntu or Android may implement it and get back with final resolution.

Thanks a lot!

Best Regards
Abraham