touchpad: rm dead tp_palm_tap_is_palm

This was added in 39f11253471500cd380c8977b8cbe0683abe6b1d
(https://bugs.freedesktop.org/show_bug.cgi?id=89625)

Later, a more sophisticated palm detection was implemented in
46eab97538af18381243f5337bf3d29e4b21098f
(https://bugs.freedesktop.org/show_bug.cgi?id=103210)

The only place where `tp_palm_tap_is_palm()` is called is if the more
sophisticated palm detection has already decided that this is not a palm,
so it should never return true.

Signed-off-by: Tobias Bengfort <tobias.bengfort@posteo.de>

3 files changed, 0 insertions, 33 deletions

diff --git a/src/evdev-mt-touchpad-tap.c b/src/evdev-mt-touchpad-tap.c
index 42d91297..299cd554 100644
--- a/src/evdev-mt-touchpad-tap.c
+++ b/src/evdev-mt-touchpad-tap.c
@@ -1261,14 +1261,6 @@ tp_tap_handle_state(struct tp_dispatch *tp, uint64_t time)
 			t->tap.initial = t->point;
 			tp->tap.nfingers_down++;
 			tp_tap_handle_event(tp, t, TAP_EVENT_TOUCH, time);
-
-			/* If we think this is a palm, pretend there's a
-			 * motion event which will prevent tap clicks
-			 * without requiring extra states in the FSM.
-			 */
-			if (tp_palm_tap_is_palm(tp, t))
-				tp_tap_handle_event(tp, t, TAP_EVENT_MOTION, time);
-
 		} else if (t->state == TOUCH_END) {
 			if (t->was_down) {
 				assert(tp->tap.nfingers_down >= 1);
diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c
index a72b9095..b29a5c56 100644
--- a/src/evdev-mt-touchpad.c
+++ b/src/evdev-mt-touchpad.c
@@ -882,21 +882,6 @@ tp_palm_in_edge(const struct tp_dispatch *tp, const struct tp_touch *t)
 	return tp_palm_in_side_edge(tp, t) || tp_palm_in_top_edge(tp, t);
 }
 
-bool
-tp_palm_tap_is_palm(const struct tp_dispatch *tp, const struct tp_touch *t)
-{
-	if (t->state != TOUCH_BEGIN)
-		return false;
-
-	if (!tp_palm_in_edge(tp, t))
-		return false;
-
-	evdev_log_debug(tp->device,
-			"palm: touch %d: palm-tap detected\n",
-			t->index);
-	return true;
-}
-
 static bool
 tp_palm_detect_dwt_triggered(struct tp_dispatch *tp,
 			     struct tp_touch *t,
@@ -1099,13 +1084,6 @@ tp_palm_detect_edge(struct tp_dispatch *tp,
 	if (t->state != TOUCH_BEGIN || !tp_palm_in_edge(tp, t))
 		return false;
 
-	/* don't detect palm in software button areas, it's
-	   likely that legitimate touches start in the area
-	   covered by the exclusion zone */
-	if (tp->buttons.is_clickpad &&
-	    tp_button_is_inside_softbutton_area(tp, t))
-		return false;
-
 	if (tp_touch_get_edge(tp, t) & EDGE_RIGHT)
 		return false;
 
diff --git a/src/evdev-mt-touchpad.h b/src/evdev-mt-touchpad.h
index c99b190f..bd5eab5f 100644
--- a/src/evdev-mt-touchpad.h
+++ b/src/evdev-mt-touchpad.h
@@ -731,9 +731,6 @@ tp_gesture_stop_twofinger_scroll(struct tp_dispatch *tp, uint64_t time);
 void
 tp_gesture_tap_timeout(struct tp_dispatch *tp, uint64_t time);
 
-bool
-tp_palm_tap_is_palm(const struct tp_dispatch *tp, const struct tp_touch *t);
-
 void
 tp_clickpad_middlebutton_apply_config(struct evdev_device *device);