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Commit 28835f45 authored by Hans de Goede's avatar Hans de Goede Committed by Dmitry Torokhov
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Input: alps - process_bitmap: round down when spreading adjescent fingers over 2 points 



This fixes 2 fingers at the same height or width on the touchpad getting
reported at different y / x coordinates.

Note num_bits is always at least 1.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 105affbf

drivers/input/mouse/alps.c

+2 −2
Original line number Diff line number Diff line
@@ -391,13 +391,13 @@ static int alps_process_bitmap(struct alps_data *priv, 
	 * adjacent fingers. Divide the single contact between the two points.

	 */

	if (fingers_x == 1) {

		i = x_low.num_bits / 2;

		i = (x_low.num_bits - 1) / 2;

		x_low.num_bits = x_low.num_bits - i;

		x_high.start_bit = x_low.start_bit + i;

		x_high.num_bits = max(i, 1);

	}

	if (fingers_y == 1) {

		i = y_low.num_bits / 2;

		i = (y_low.num_bits - 1) / 2;

		y_low.num_bits = y_low.num_bits - i;

		y_high.start_bit = y_low.start_bit + i;

		y_high.num_bits = max(i, 1);