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HID: magicmouse: disable and add module param for scroll acceleration
Scroll acceleration is unique to the magicmouse driver, and is unintuitive to a user who is unaware of the functionality. Thus, disable it by default, but add a module parameter to enable it for power users who want it. Signed-off-by: Chase Douglas <chase.douglas@canonical.com> Acked-by: Michael Poole <mdpoole@troilus.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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1 changed files with 7 additions and 1 deletions
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@ -30,6 +30,10 @@ static bool emulate_scroll_wheel = true;
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module_param(emulate_scroll_wheel, bool, 0644);
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MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
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static bool scroll_acceleration = false;
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module_param(scroll_acceleration, bool, 0644);
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MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events");
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static bool report_touches = true;
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module_param(report_touches, bool, 0644);
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MODULE_PARM_DESC(report_touches, "Emit touch records (otherwise, only use them for emulation)");
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@ -177,7 +181,9 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
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switch (tdata[7] & TOUCH_STATE_MASK) {
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case TOUCH_STATE_START:
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msc->touches[id].scroll_y = y;
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msc->scroll_accel = min_t(int, msc->scroll_accel + 1,
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if (scroll_acceleration)
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msc->scroll_accel = min_t(int,
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msc->scroll_accel + 1,
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ARRAY_SIZE(accel_profile) - 1);
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break;
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case TOUCH_STATE_DRAG:
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