On Fri, Jan 28, 2011 at 4:05 PM, Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> wrote: > On Fri, Jan 28, 2011 at 01:57:17PM -0800, Ping Cheng wrote: >> On Fri, Jan 28, 2011 at 12:54 PM, Dmitry Torokhov >> <dmitry.torokhov@xxxxxxxxx> wrote: >> >> >> > so I believe >> >> >> > min, max and resultion should be reported on ABS_X, Y, X, etc, or, if >> >> >> > you want to have this data in ABS_MT_POSITION, it should be trhe same. >> >> >> >> >> >> max/min is different from resolution. We can scale max/min since they >> >> >> are logical data. But we can not change the device's physical size. >> >> >> That's the root cause of the "stubborn" nature of resolution. >> >> > >> >> > This is the same device so it should have the same physical dimensions, >> >> > right? >> >> >> >> No, pen and touch use different chips. They can have different sizes. >> > >> > It does not matter how many chips you have inside. What matters whether >> > they share a working surface or not. If working surface is the same (and >> > consequentially you have single input_dev structure) then dimensions are >> > the same. >> >> They do not always share the exact same surface. Most of the devices >> do have the same working surface. But not all of them although the >> differences are normally small. To represent a finger touch, it may >> not be too big a deal. But, making the assumption that they are the >> same size doesn't sound right. >> >> Do we ignore that small imprecision? > > I think we should consider these cases as having roughly the same > dimensions of working surfaces. Because if we do what you are proposing > the next thing we'll see an MT device that can report several tools > simultaneously and your scheme breaks apart. > > Devices with surface characteristics so different that they can't be > handled well by scaling to common denominator should probably be > presented as 2 independent logical devices. Dmitry, Version 2 will be sent incorporating the above comments in a moment. Henrik, The Bamboo resolution has already been scaled since we calculated it through the scaled logical maximum. So, no changes needed there. Ping -- 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
