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| author | Peter Hutterer <[email protected]> | 2018-12-05 10:42:21 +1000 |
|---|---|---|
| committer | Benjamin Tissoires <[email protected]> | 2018-12-07 16:27:11 +0100 |
| commit | 52ea899637c746984d657b508da6e3f2686adfca (patch) | |
| tree | 5e710d864a62c37567fce0ad91a5bce45486b2f5 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | e195ca6cb6f21633e56322d5aa11ed59cdb22fb2 (diff) | |
Input: add `REL_WHEEL_HI_RES` and `REL_HWHEEL_HI_RES`
This event code represents scroll reports from high-resolution wheels and
is modelled after the approach Windows uses. The value 120 is one detent
(wheel click) of movement. Mice with higher-resolution scrolling can send
fractions of 120 which must be accumulated in userspace. Userspace can either
wait for a full 120 to accumulate or scroll by fractions of one logical scroll
movement as the events come in. 120 was picked as magic number because it has
a high number of integer fractions that can be used by high-resolution wheels.
For more information see
https://docs.microsoft.com/en-us/previous-versions/windows/hardware/design/dn613912(v=vs.85)
These new axes obsolete REL_WHEEL and REL_HWHEEL. The legacy axes are emulated
by the kernel but the most accurate (and most granular) data is available
through the new axes.
Signed-off-by: Peter Hutterer <[email protected]>
Acked-by: Dmitry Torokhov <[email protected]>
Verified-by: Harry Cutts <[email protected]>
Signed-off-by: Benjamin Tissoires <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions