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HID: wacom: generic: Send BTN_TOOL_PEN in prox once the pen enters range 

When a pen is first able to to be sensed by the tablet, we would like
to inform userspace that a tool is nearby so that it can attempt to
perform palm rejection. Unfortunately, we don't know any information
about the tool that is nearby, so the best we can do is send a prox
event for a generic BTN_TOOL_PEN. If the pen later comes closer and
enters proximity, we can determine the actual tool type and send
BTN_TOOL_PEN out of prox if necessary.

Signed-off-by: Ping Cheng <ping.cheng@wacom.com>
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Jason Gerecke 2017-09-07 17:51:06 -07:00 committed by Jiri Kosina
parent 4affc2331a
commit 3e70969e44
1 changed files with 11 additions and 0 deletions
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11
drivers/hid/wacom_wac.c
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@ -2247,6 +2247,17 @@ static void wacom_wac_pen_report(struct hid_device *hdev,
wacom_wac->tool[0] = wacom_intuos_get_tool_type(wacom_wac->id[0]);
else
wacom_wac->tool[0] = BTN_TOOL_PEN;
if (wacom_wac->shared->stylus_in_proximity &&
wacom_wac->tool[0] != BTN_TOOL_PEN) {
input_report_key(input, BTN_TOOL_PEN, 0);
input_sync(input);
}
}
else if (!wacom_wac->tool[0] && !range) { /* entering in sense */
input_report_key(input, BTN_TOOL_PEN, sense);
input_report_key(input, BTN_TOUCH, 0);
input_sync(input);
}
/* keep pen state for touch events */