On Fri, Feb 04, 2005 at 07:40:43AM +0100, Peter Osterlund wrote:
> Vojtech Pavlik <[EMAIL PROTECTED]> writes:
>
> > On Thu, Feb 03, 2005 at 10:54:51PM +0100, Peter Osterlund wrote:
> >
> > > * Removes the xres/yres scaling so that you get the same speed in the
> > > X and Y directions even if your screen is not square.
> >
> > The old code assumed that both the pad and the screen are 4:3, not
> > square. It was wrong still.
> alps.c currently contains:
>
> psmouse->dev.evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
> input_set_abs_params(&psmouse->dev, ABS_X, 0, 1023, 0, 0);
> input_set_abs_params(&psmouse->dev, ABS_Y, 0, 1023, 0, 0);
> input_set_abs_params(&psmouse->dev, ABS_PRESSURE, 0, 127, 0, 0);
>
> Maybe it should set the ABS_Y max value to 767 in that case.
Yes, and no. It could have been 1023, if it was 3:4 in size, but not in
maximum values. See the real values below, though, it seems the
resolution in X and Y is indeed the same.
> --- linux/drivers/input/mouse/alps.c~ 2005-01-12 22:02:19.000000000 +0100
> +++ linux/drivers/input/mouse/alps.c 2005-02-04 07:38:12.203436768 +0100
> @@ -394,7 +394,7 @@
>
> psmouse->dev.evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
> input_set_abs_params(&psmouse->dev, ABS_X, 0, 1023, 0, 0);
> - input_set_abs_params(&psmouse->dev, ABS_Y, 0, 1023, 0, 0);
> + input_set_abs_params(&psmouse->dev, ABS_Y, 0, 767, 0, 0);
> input_set_abs_params(&psmouse->dev, ABS_PRESSURE, 0, 127, 0, 0);
>
> psmouse->dev.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
My ALPS gives values:
X: 90-1019
Y: 100-749
Pressure: 0,34-108
So 0-1024, 0-768, 0-127 are probably the maximum theoretical ranges, and
the rest are likely the mechanical mounting limitations of the notebook
(the ridge around the pad is not rectangular).
--
Vojtech Pavlik
SuSE Labs, SuSE CR
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
