From d471b6b22d37bf9928c6d0202bdaaf76583b8b61 Mon Sep 17 00:00:00 2001
From: Jason Gerecke <killertofu@gmail.com>
Date: Tue, 12 Jun 2018 13:42:46 -0700
Subject: [PATCH] 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>
---
drivers/hid/wacom_sys.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index ee7a37eb159ac..545986cfb9788 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -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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