evdev always returns fixed XY values

[Marco Cavallini]

Il 22/05/2015 15:28, Peter Korsgaard ha scritto:
>
> Hi,
>
>   > The evtest returns values between ~4600 to ~7800
>   > I touched min XY and max XY points.
>   > xinput test returns always 4095.
>   > Wat am I missing?
>
> Looks like your touchscreen driver is buggy.
>
>   > # evtest /dev/input/event0
>   > Input driver version is 1.0.1
>   > Input device ID: bus 0x0 vendor 0x0 product 0x0 version 0x0
>   > Input device name: "ADS7843 Touchscreen"
>   > Supported events:
>   >   Event type 0 (EV_SYN)
>   >   Event type 1 (EV_KEY)
>   >     Event code 330 (BTN_TOUCH)
>   >   Event type 3 (EV_ABS)
>   >     Event code 0 (ABS_X)
>   >       Value      0
>   >       Min        0
>   >       Max     4095
>   >     Event code 1 (ABS_Y)
>   >       Value      0
>   >       Min        0
>   >       Max     4095
>
> Driver claims to return X/Y in 0..4095 range.
>
>   > Event: time 1432134719.652423, type 3 (EV_ABS), code 0 (ABS_X), value 7823
>   > Event: time 1432134719.652423, type 3 (EV_ABS), code 1 (ABS_Y), value 7987
>
> But then returns values that are outside this range, confusing user space.
>
> Garbage in is garbage out.
>


Hi Peter,

So why ts_print is working?
Couldn't this be related to xinput only?

Values from ~4448 to ~7783

1432134805.418559:   4448   4217  32768
1432134805.429196:   4443   4215  32768
1432134805.438954:   4438   4216  32768
1432134805.449473:   4435   4218  32768
1432134805.458969:   4429   4219  32768
1432134805.468946:   4425   4221  32768
1432134805.478909:   4422   4222  32768
1432134805.490955:   4418   4224  32768
1432134805.498909:   4414   4225  32768
1432134805.517313:   5831   5931      0
1432134807.098553:   7804   7955  32768
1432134807.109174:   7805   7955  32768
1432134807.118929:   7806   7955  32768
1432134807.128856:   7806   7957  32768
1432134807.138843:   7806   7958  32768
1432134807.148981:   7802   7958  32768
1432134807.158960:   7797   7953  32768
1432134807.168963:   7791   7953  32768
1432134807.177293:   7783   7956      0


Regards,
--
Marco