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Commit 4435ff2f authored by Harry Cutts's avatar Harry Cutts Committed by Benjamin Tissoires
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HID: logitech: Enable high-resolution scrolling on Logitech mice



There are three features used by various Logitech mice for
high-resolution scrolling: the scrolling acceleration bit in HID++ 1.0,
and the x2120 and x2121 features in HID++ 2.0 and above. This patch
supports all three, and uses the multiplier reported by the mouse for
the HID++ 2.0+ features.

The full list of product IDs of mice which support high-resolution
scrolling was provided by Logitech, but the patch was tested using the
following mice (using the Unifying receiver):

* HID++ 1.0: Anywhere MX, Performance MX
* x2120: M560
* x2121: MX Anywhere 2, MX Master 2S

This patch is a combinations of the now-reverted commits 1ff2e1a4,
d56ca985, 5fe2ccbe, 044ee890 together with some extra bits for the
directional and timeout-based reset.
The previous patch series was in hid-input, it appears this remainder
handling is logitech-specific and was moved to hid-logitech-hidpp.c and
renamed accordingly.

Signed-off-by: default avatarHarry Cutts <hcutts@chromium.org>
Signed-off-by: default avatarPeter Hutterer <peter.hutterer@who-t.net>
Verified-by: default avatarHarry Cutts <hcutts@chromium.org>
Signed-off-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
parent 95c3d002
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