[PATCH 2/2] input: synaptics - fix width calculation on image sensors
From: Gabriele Mazzotta <hidden>
Date: 2014-12-27 11:32:08
Also in:
lkml
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
When two or more fingers are on the touchpad, the 'w' slot holds the finger count rather than the width. Retrieve the correct value encoded in the lower bits of 'x', 'y' and 'z'. The minimum width reported is 8 rather than 4 in this case, while the maximum remains 15. Signed-off-by: Gabriele Mazzotta <redacted> --- drivers/input/mouse/synaptics.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index ea0563e..5ff4c5b 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c@@ -593,7 +593,9 @@ static void synaptics_parse_agm(const unsigned char buf[], switch (agm_packet_type) { case 1: /* Gesture packet: (x, y, z) half resolution */ - agm->w = hw->w; + agm->w = ((buf[1] & 0x01) | + ((buf[2] & 0x01) << 1) | + ((buf[5] & 0x01) << 2)) + 8; agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1; agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1; agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
--
2.1.4