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HID: wacom: Don't report anything prior to the tool entering range

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commit e92a7be7fe upstream.

If the tool spends some time in prox before entering range, a series of
events (e.g. ABS_DISTANCE, MSC_SERIAL) can be sent before we or userspace
have any clue about the pen whose data is being reported. We need to hold
off on reporting anything until the pen has entered range. Since we still
want to report events that occur "in prox" after the pen has *left* range
we use 'wacom-tool[0]' as the indicator that the pen did at one point
enter range and provide us/userspace with tool type and serial number
information.

Fixes: a48324de6d ("HID: wacom: Bluetooth IRQ for Intuos Pro should handle prox/range")
Cc: <stable@vger.kernel.org> # 4.11+
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Reviewed-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jason Gerecke
2019-04-24 15:12:58 -07:00
committed by Greg Kroah-Hartman
parent bed5114a90
commit 6fff9ed6bc
1 changed files with 11 additions and 9 deletions
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20
drivers/hid/wacom_wac.c
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@@ -1271,17 +1271,19 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
input_report_abs(pen_input, ABS_Z, rotation);
input_report_abs(pen_input, ABS_WHEEL, get_unaligned_le16(&frame[11]));
}
input_report_abs(pen_input, ABS_PRESSURE, get_unaligned_le16(&frame[5]));
input_report_abs(pen_input, ABS_DISTANCE, range ? frame[13] : wacom->features.distance_max);
if (wacom->tool[0]) {
input_report_abs(pen_input, ABS_PRESSURE, get_unaligned_le16(&frame[5]));
input_report_abs(pen_input, ABS_DISTANCE, range ? frame[13] : wacom->features.distance_max);
input_report_key(pen_input, BTN_TOUCH, frame[0] & 0x01);
input_report_key(pen_input, BTN_STYLUS, frame[0] & 0x02);
input_report_key(pen_input, BTN_STYLUS2, frame[0] & 0x04);
input_report_key(pen_input, BTN_TOUCH, frame[0] & 0x01);
input_report_key(pen_input, BTN_STYLUS, frame[0] & 0x02);
input_report_key(pen_input, BTN_STYLUS2, frame[0] & 0x04);
input_report_key(pen_input, wacom->tool[0], prox);
input_event(pen_input, EV_MSC, MSC_SERIAL, wacom->serial[0]);
input_report_abs(pen_input, ABS_MISC,
wacom_intuos_id_mangle(wacom->id[0])); /* report tool id */
input_report_key(pen_input, wacom->tool[0], prox);
input_event(pen_input, EV_MSC, MSC_SERIAL, wacom->serial[0]);
input_report_abs(pen_input, ABS_MISC,
wacom_intuos_id_mangle(wacom->id[0])); /* report tool id */
}
wacom->shared->stylus_in_proximity = prox;