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SubjectRe: [PATCH 3/3] Input: Added thumb detection in BCM5974 multitouch driver
Hi Friedrich,

On Wed, Nov 20, 2013 at 11:54:12PM +0100, Friedrich Schöller wrote:
> Trackpads with integrated buttons are hard to use when the driver responds to
> movements of the thumb that is resting or clicking on the surface of the
> trackpad. This patch adds rudimentary support to filter out these touch events.
>
> The feature can be turned on via sysfs:
> /sys/class/input/input[0-9]+/thumb_ignore:
> Enables thumb detection
> Values: 0/1
> /sys/class/input/input[0-9]+/thumb_ratio_on:
> When the ratio of ABS_MT_TOUCH_MINOR / ABS_MT_TOUCH_MAJOR
> times 100 is smaller than this value the touch qualifies
> as a thumb.
> /sys/class/input/input[0-9]+/thumb_ratio_off:
> When the ratio of ABS_MT_TOUCH_MINOR / ABS_MT_TOUCH_MAJOR
> times 100 is bigger than this value the touch no longer
> qualifies as a thumb.
> /sys/class/input/input[0-9]+/thumb_y_on:
> When ABS_MT_POSITION_Y is bigger than this value the touch
> qualifies as a thumb.
> /sys/class/input/input[0-9]+/thumb_y_off:
> When ABS_MT_POSITION_Y is smaller than this value the touch
> no longer qualifies as a thumb.

I'd rather this been implemented in userspace (synaptics and/or evdev X
drivers).

Thanks.

--
Dmitry
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