Hi Dmitry,

From: Dmitry Torokhov [mailto:dmitry.torokhov@gmail.com]

quoted

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

quoted

My idea is to create an attribute "virtualized" to enable/disable

virtualization in the second touchscreen

quoted

+ 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

quoted

* 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