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touchpad: increase the jump detection interval to 30ms

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On serial touchpads it's common enough that frames slow down tofrom the usual
12ms to 24ms. That's too close to our 25ms cutoff so if we have a minor delay,
we end up missing out on jump detection.

Fixes #541

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer 2020-11-25 13:26:16 +10:00
parent bfa077d2a8
commit 535f92a546
1 changed files with 2 additions and 2 deletions
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4
src/evdev-mt-touchpad.c
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@ -1534,10 +1534,10 @@ tp_detect_jumps(const struct tp_dispatch *tp,
if (tp->device->model_flags & EVDEV_MODEL_TEST_DEVICE)
reference_interval = tdelta;
/* If the last frame is more than 25ms ago, we have irregular
/* If the last frame is more than 30ms ago, we have irregular
* frames, who knows what's a pointer jump here and what's
* legitimate movement.... */
if (tdelta > 2 * reference_interval || tdelta == 0)
if (tdelta > 2.5 * reference_interval || tdelta == 0)
return false;
/* We historically expected ~12ms frame intervals, so the numbers