[PATCH 2/2] HID: magicmouse: high-resolution scroll threshold
From: José Expósito <hidden>
Date: 2021-07-07 15:59:04
Also in:
lkml
Subsystem:
hid core layer, the rest · Maintainers:
Jiri Kosina, Benjamin Tissoires, Linus Torvalds
In order to avoid triggering involuntary high-resolution scroll events due to tiny touch movement deltas, add a movement threshold. The value chosen for the threshold, about 1.5 ~ 2 mm, is similar to the threshold used on touchpads by libinput (see libinput evdev-mt-touchpad-gestures.c) to try to keep the scroll experience consistent. Signed-off-by: José Expósito <redacted> --- drivers/hid/hid-magicmouse.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-)
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index e95f46dab4ad..686788ebf3e1 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c@@ -71,6 +71,7 @@ MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state fie /* Number of high-resolution events for each low-resolution detent. */ #define SCROLL_HR_STEPS 10 #define SCROLL_HR_MULT (120 / SCROLL_HR_STEPS) +#define SCROLL_HR_THRESHOLD 90 /* units */ #define SCROLL_ACCEL_DEFAULT 7 /* Touch surface information. Dimension is in hundredths of a mm, min and max
@@ -132,6 +133,8 @@ struct magicmouse_sc { short scroll_x_hr; short scroll_y_hr; u8 size; + bool scroll_x_active; + bool scroll_y_active; } touches[16]; int tracking_ids[16];
@@ -265,6 +268,8 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda msc->touches[id].scroll_y = y; msc->touches[id].scroll_x_hr = x; msc->touches[id].scroll_y_hr = y; + msc->touches[id].scroll_x_active = false; + msc->touches[id].scroll_y_active = false; /* Reset acceleration after half a second. */ if (scroll_acceleration && time_before(now,
@@ -292,8 +297,16 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda input_report_rel(input, REL_WHEEL, step_y); } + if (!msc->touches[id].scroll_x_active && + abs(step_x_hr) > SCROLL_HR_THRESHOLD) { + msc->touches[id].scroll_x_active = true; + msc->touches[id].scroll_x_hr = x; + step_x_hr = 0; + } + step_x_hr /= step_hr; - if (step_x_hr != 0) { + if (step_x_hr != 0 && + msc->touches[id].scroll_x_active) { msc->touches[id].scroll_x_hr -= step_x_hr * step_hr; input_report_rel(input,
@@ -301,8 +314,16 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda -step_x_hr * SCROLL_HR_MULT); } + if (!msc->touches[id].scroll_y_active && + abs(step_y_hr) > SCROLL_HR_THRESHOLD) { + msc->touches[id].scroll_y_active = true; + msc->touches[id].scroll_y_hr = y; + step_y_hr = 0; + } + step_y_hr /= step_hr; - if (step_y_hr != 0) { + if (step_y_hr != 0 && + msc->touches[id].scroll_y_active) { msc->touches[id].scroll_y_hr -= step_y_hr * step_hr; input_report_rel(input,
--
2.25.1