On Tue, Feb 21, 2017 at 06:13:32PM +0100, Sebastian Reichel wrote: > Hi, > > On Mon, Feb 20, 2017 at 05:56:35PM +0100, H. Nikolaus Schaller wrote: > > previously, tsc2007 will report as ABS_PRESSURE: > > 0 for no pressure (resistance infinite) > > high value for soft pressure (high resistance) > > low value for firm pressure (lower resistance) > > > > This does not matter for most applications (e.g. GUI, Menu, Scrolling > > etc.) where the ABS_PRESSURE is ignored and only BTN_TOUCH is processed > > to detect screen taps. > > > > Only some special graphics applications read the pressure channel and > > they will be mixed up by this non-monotonic relation. > > > > So we fix it to become: > > 0 for no pressure (resistance infinite) > > low value for soft pressure (high resistance) > > high value for firm pressure (lower resistance) > > > > While this patch changes the values reported to userspace, > > ABS_PRESSURE is used rarely by userspace. Most software only > > relies on BTN_TOUCH (boolean), which is not affected by this > > patch. Some graphics software makes use of the interface and > > does not work correctly with the currently used inverted > > behaviour. > > > > Signed-off-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx> > > --- > > drivers/input/touchscreen/tsc2007_core.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/drivers/input/touchscreen/tsc2007_core.c b/drivers/input/touchscreen/tsc2007_core.c > > index 30b53ca..fc73849 100644 > > --- a/drivers/input/touchscreen/tsc2007_core.c > > +++ b/drivers/input/touchscreen/tsc2007_core.c > > @@ -141,6 +141,8 @@ static irqreturn_t tsc2007_soft_irq(int irq, void *handle) > > "DOWN point(%4d,%4d), resistance (%4u)\n", > > tc.x, tc.y, rt); > > > > + rt = ts->max_rt - rt; > > + > > input_report_key(input, BTN_TOUCH, 1); > > input_report_abs(input, ABS_X, tc.x); > > input_report_abs(input, ABS_Y, tc.y); > > Reviewed-By: Sebastian Reichel <sre@xxxxxxxxxx> Applied, thank you. -- Dmitry -- 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
