path: root/drivers/input/mouse/synaptics.c
diff options
authorPeter Hutterer <peter.hutterer@who-t.net>2018-01-16 15:20:58 -0800
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2018-01-16 16:26:25 -0800
commit19eb4ed1141bd1096b9bc84ba9c4d03d5830c143 (patch)
treebd0a25434187e69b20143e32b910f0f91d7d75db /drivers/input/mouse/synaptics.c
parentInput: psmouse - fix Synaptics detection when protocol is disabled (diff)
Input: synaptics - reset the ABS_X/Y fuzz after initializing MT axes
input_mt_init_slots() resets the ABS_X/Y fuzz to 0 and expects the driver to call input_mt_report_pointer_emulation(). That is based on the MT position bits which are already defuzzed - hence a fuzz of 0. In the case of synaptics semi-mt devices, we report the ABS_X/Y axes manually. This results in the MT position being defuzzed but the single-touch emulation missing that defuzzing. Work around this by re-initializing the ABS_X/Y axes after the MT axis to get the same fuzz value back. https://bugs.freedesktop.org/show_bug.cgi?id=104533 Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/mouse/synaptics.c')
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index ee5466a374bf..a246fc686bb7 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -1280,6 +1280,16 @@ static void set_input_params(struct psmouse *psmouse,
(cr48_profile_sensor ?
+ /*
+ * For semi-mt devices we send ABS_X/Y ourselves instead of
+ * input_mt_report_pointer_emulation. But
+ * input_mt_init_slots() resets the fuzz to 0, leading to a
+ * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
+ * position. Let's re-initialize ABS_X/Y here.
+ */
+ if (!cr48_profile_sensor)
+ set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
if (SYN_CAP_PALMDETECT(info->capabilities))