提交 4eb1830b 编写于 作者: J Jason Gerecke 提交者: Dmitry Torokhov

Input: wacom - send proper tablet state info when pen leaves proximity

The EMR sensor of Intuos4 and newer devices can send a packet with
0x20 in its second byte which contains only location information.
This packet is sent when the pen is too far away to reliably obtain
other information. Because only the location is updated userspace
will continue to see stale information for other values, most notably
TOUCH, PRESSURE, and DISTANCE.

This patch ensures userspace is not left with stale device state
information when the pen re-enters proximity (possibly leading to
the assumption the pen is still in contact even though it is
actually hovering).
Signed-off-by: NJason Gerecke <killertofu@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
上级 36d3c510
......@@ -427,6 +427,13 @@ static int wacom_intuos_inout(struct wacom_wac *wacom)
(features->type == WACOM_21UX2))
return 1;
/* Range Report */
if ((data[1] & 0xfe) == 0x20) {
input_report_key(input, BTN_TOUCH, 0);
input_report_abs(input, ABS_PRESSURE, 0);
input_report_abs(input, ABS_DISTANCE, wacom->features.distance_max);
}
/* Exit report */
if ((data[1] & 0xfe) == 0x80) {
if (features->quirks == WACOM_QUIRK_MULTI_INPUT)
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册