| Message ID | 1377220537-1474-3-git-send-email-killertofu@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c index 869e9c9..f67a75a 100644 --- a/drivers/input/tablet/wacom_wac.c +++ b/drivers/input/tablet/wacom_wac.c @@ -425,6 +425,13 @@ 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)
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: Jason Gerecke <killertofu@gmail.com> --- drivers/input/tablet/wacom_wac.c | 7 +++++++ 1 file changed, 7 insertions(+)