| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 60/98] HID: wacom: Correct distance scale for 2nd-gen Intuos devices | Date | Tue, 27 Aug 2019 09:50:39 +0200 |
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From: Jason Gerecke <jason.gerecke@wacom.com>
commit b72fb1dcd2ea9d29417711cb302cef3006fa8d5a upstream.
Distance values reported by 2nd-gen Intuos tablets are on an inverted scale (0 == far, 63 == near). We need to change them over to a normal scale before reporting to userspace or else userspace drivers and applications can get confused.
Ref: https://github.com/linuxwacom/input-wacom/issues/98 Fixes: eda01dab53 ("HID: wacom: Add four new Intuos devices") Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com> Cc: <stable@vger.kernel.org> # v4.4+ Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/hid/wacom_wac.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -848,6 +848,8 @@ static int wacom_intuos_general(struct w y >>= 1; distance >>= 1; } + if (features->type == INTUOSHT2) + distance = features->distance_max - distance; input_report_abs(input, ABS_X, x); input_report_abs(input, ABS_Y, y); input_report_abs(input, ABS_DISTANCE, distance);
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