touchpad: pull the tap exclusion zone down to the full edge zone

This was originally left outside of the button areas in case users tap in
those zones, but we're getting false tap events in that zone.

On a 100mm touchpad, the edge zone is merely 5mm, it's acceptable to ignore
taps in that area even in the software button. We can revisit this if we see
tap detection failures in the future.

https://bugzilla.redhat.com/show_bug.cgi?id=1415796Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>

src/evdev-mt-touchpad.c

@@ -557,15 +557,8 @@ tp_palm_tap_is_palm(const struct tp_dispatch *tp, const struct tp_touch *t)
 	    t->point.x < tp->palm.right_edge)
 		return false;
 
-	/* We're inside the left/right palm edge and not in one of the
-	 * software button areas */
-	if (t->point.y < tp->buttons.bottom_area.top_edge) {
-		evdev_log_debug(tp->device,
-				"palm: palm-tap detected\n");
-		return true;
-	}
-
-	return false;
+	evdev_log_debug(tp->device, "palm: palm-tap detected\n");
+	return true;
 }
 
 static bool

test/test-touchpad.c

@@ -1176,15 +1176,15 @@ START_TEST(touchpad_palm_detect_tap_softbuttons)
 
 	litest_drain_events(li);
 
-	litest_touch_down(dev, 0, 95, 5);
+	litest_touch_down(dev, 0, 99, 99);
 	litest_touch_up(dev, 0);
 	litest_assert_empty_queue(li);
 
-	litest_touch_down(dev, 0, 5, 5);
+	litest_touch_down(dev, 0, 1, 99);
 	litest_touch_up(dev, 0);
 	litest_assert_empty_queue(li);
 
-	litest_touch_down(dev, 0, 5, 99);
+	litest_touch_down(dev, 0, 10, 99);
 	litest_touch_up(dev, 0);
 	litest_assert_button_event(li,
 				   BTN_LEFT,
@@ -1194,7 +1194,7 @@ START_TEST(touchpad_palm_detect_tap_softbuttons)
 				   LIBINPUT_BUTTON_STATE_RELEASED);
 	litest_assert_empty_queue(li);
 
-	litest_touch_down(dev, 0, 95, 99);
+	litest_touch_down(dev, 0, 90, 99);
 	litest_touch_up(dev, 0);
 	litest_assert_button_event(li,
 				   BTN_LEFT,