Commit 3e9e0e2e authored by Peter Hutterer's avatar Peter Hutterer

touchpad: cap the edge palm detection zones at 8mm

The main purpose of the edge zone is to detect palms in the area where we
cannot assume a full finger size and thus cannot use any other palm detection
mechanism. 8mm should be large enough that a finger should be detected based
on other properties (size, pressure, ...). Peter Hutterer's avatarPeter Hutterer <>
Reviewed-by: default avatarDaniel Martin <>
parent 017d6bb9
......@@ -2646,8 +2646,8 @@ tp_init_palmdetect_edge(struct tp_dispatch *tp,
if (width < 70.0)
/* palm edges are 8% of the width on each side */
mm.x = width * 0.08;
/* palm edges are 8% of the width on each side up to a max of 8mm */
mm.x = min(8, width * 0.08);
edges = evdev_device_mm_to_units(device, &mm);
tp->palm.left_edge = edges.x;
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