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authorBenjamin Tissoires <benjamin.tissoires@redhat.com>2018-11-21 16:27:11 +0100
committerBenjamin Tissoires <benjamin.tissoires@redhat.com>2018-11-22 08:57:38 +0100
commitf1539a0c2545d7bd82e451bd1464f2a820f55de4 (patch)
treea1e53314077b8112e8b2d7224e1c784c5545fe54 /drivers/hid
parent00acc9e2c4a55045d73f2615429742369996d801 (diff)
downloadlinux-f1539a0c2545d7bd82e451bd1464f2a820f55de4.tar.bz2
Revert "HID: input: Create a utility class for counting scroll events"
This reverts commit 1ff2e1a44e02d4bdbb9be67c7d9acc240a67141f. It turns out the current API is not that compatible with some Microsoft mice, so better start again from scratch. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Acked-by: Harry Cutts <hcutts@chromium.org> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-input.c45
1 files changed, 0 insertions, 45 deletions
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 28ee2ed88a1a..d6fab5798487 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1841,48 +1841,3 @@ void hidinput_disconnect(struct hid_device *hid)
}
EXPORT_SYMBOL_GPL(hidinput_disconnect);
-/**
- * hid_scroll_counter_handle_scroll() - Send high- and low-resolution scroll
- * events given a high-resolution wheel
- * movement.
- * @counter: a hid_scroll_counter struct describing the wheel.
- * @hi_res_value: the movement of the wheel, in the mouse's high-resolution
- * units.
- *
- * Given a high-resolution movement, this function converts the movement into
- * microns and emits high-resolution scroll events for the input device. It also
- * uses the multiplier from &struct hid_scroll_counter to emit low-resolution
- * scroll events when appropriate for backwards-compatibility with userspace
- * input libraries.
- */
-void hid_scroll_counter_handle_scroll(struct hid_scroll_counter *counter,
- int hi_res_value)
-{
- int low_res_scroll_amount;
- /* Some wheels will rest 7/8ths of a notch from the previous notch
- * after slow movement, so we want the threshold for low-res events to
- * be in the middle of the notches (e.g. after 4/8ths) as opposed to on
- * the notches themselves (8/8ths).
- */
- int threshold = counter->resolution_multiplier / 2;
-
- input_report_rel(counter->dev, REL_WHEEL_HI_RES,
- hi_res_value * counter->microns_per_hi_res_unit);
-
- counter->remainder += hi_res_value;
- if (abs(counter->remainder) >= threshold) {
- /* Add (or subtract) 1 because we want to trigger when the wheel
- * is half-way to the next notch (i.e. scroll 1 notch after a
- * 1/2 notch movement, 2 notches after a 1 1/2 notch movement,
- * etc.).
- */
- low_res_scroll_amount =
- counter->remainder / counter->resolution_multiplier
- + (hi_res_value > 0 ? 1 : -1);
- input_report_rel(counter->dev, REL_WHEEL,
- low_res_scroll_amount);
- counter->remainder -=
- low_res_scroll_amount * counter->resolution_multiplier;
- }
-}
-EXPORT_SYMBOL_GPL(hid_scroll_counter_handle_scroll);