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> We should add the same to ts200x-core. -- Sebastian
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