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HID: wacom: Correct touch maximum XY of 2nd-gen Intuos

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The touch sensors on the 2nd-gen Intuos tablets don't use a 4096x4096
sensor like other similar tablets (3rd-gen Bamboo, Intuos5, etc.).
The incorrect maximum XY values don't normally affect userspace since
touch input from these devices is typically relative rather than
absolute. It does, however, cause problems when absolute distances
need to be measured, e.g. for gesture recognition. Since the resolution
of the touch sensor on these devices is 10 units / mm (versus 100 for
the pen sensor), the proper maximum values can be calculated by simply
dividing by 10.

Fixes: b5fd2a3e92 ("Input: wacom - add support for three new Intuos devices")
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Jason Gerecke 2018-06-26 09:58:02 -07:00 committed by Jiri Kosina
parent 717adfdaf1
commit 3b8d573586
1 changed files with 8 additions and 2 deletions
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10
drivers/hid/wacom_wac.c
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@ -3365,8 +3365,14 @@ void wacom_setup_device_quirks(struct wacom *wacom)
if (features->type >= INTUOSHT && features->type <= BAMBOO_PT) if (features->type >= INTUOSHT && features->type <= BAMBOO_PT)
features->device_type |= WACOM_DEVICETYPE_PAD; features->device_type |= WACOM_DEVICETYPE_PAD;
features->x_max = 4096; if (features->type == INTUOSHT2) {
features->y_max = 4096; features->x_max = features->x_max / 10;
features->y_max = features->y_max / 10;
}
else {
features->x_max = 4096;
features->y_max = 4096;
}
} }
else if (features->pktlen == WACOM_PKGLEN_BBTOUCH) { else if (features->pktlen == WACOM_PKGLEN_BBTOUCH) {
features->device_type |= WACOM_DEVICETYPE_PAD; features->device_type |= WACOM_DEVICETYPE_PAD;