Commit d471b6b2 authored Jun 12, 2018 by Jason Gerecke Committed by Jiri Kosina Jun 20, 2018

HID: wacom: Correct logical maximum Y for 2nd-gen Intuos Pro large



The HID descriptor for the 2nd-gen Intuos Pro large (PTH-860) contains
a typo which defines an incorrect logical maximum Y value. This causes
a small portion of the bottom of the tablet to become unusable (both
because the area is below the "bottom" of the tablet and because
'wacom_wac_event' ignores out-of-range values). It also results in a
skewed aspect ratio.

To fix this, we add a quirk to 'wacom_usage_mapping' which overwrites
the data with the correct value.

Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
CC: stable@vger.kernel.org # v4.10+
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

parent ebeaa367

drivers/hid/wacom_sys.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -395,6 +395,14 @@ static void wacom_usage_mapping(struct hid_device *hdev,
		}
		}

		/* 2nd-generation Intuos Pro Large has incorrect Y maximum */
		if (hdev->vendor == USB_VENDOR_ID_WACOM &&
		hdev->product == 0x0358 &&
		WACOM_PEN_FIELD(field) &&
		wacom_equivalent_usage(usage->hid) == HID_GD_Y) {
		field->logical_maximum = 43200;
		}

		switch (usage->hid) {
		case HID_GD_X:
		features->x_max = field->logical_maximum;

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