Commit b72fb1dc authored Aug 07, 2019 by Jason Gerecke Committed by Jiri Kosina Aug 19, 2019

HID: wacom: Correct distance scale for 2nd-gen Intuos devices

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: eda01dab ("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>

parent a3384b8d

drivers/hid/wacom_wac.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -846,6 +846,8 @@ static int wacom_intuos_general(struct wacom_wac *wacom)
		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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