Hi Friedrich, > On wellspring3 devices ABS_MT_TOUCH_MINOR was sometimes reported bigger than > ABS_MT_TOUCH_MAJOR. This is fixed by rescaling ABS_MT_TOUCH_MINOR by a factor > of > 0.85 instead of 2. Excessive tapping on the trackpad shows this to be the > right > value. Circular touches should now lead to values for ABS_MT_TOUCH_MAJOR and > ABS_MT_TOUCH_MINOR that are similar, with ABS_MT_TOUCH_MINOR never greater > than > ABS_MT_TOUCH_MAJOR. > --- > drivers/input/mouse/bcm5974.c | 20 +++++++++++++++++--- > 1 file changed, 17 insertions(+), 3 deletions(-)
The major/minor scales are following the aspect ratio of the device, and as such it could happen that minor > major. Most userland drivers do not use the finger width limits, which are estimates, but only the device axes limit, which are accurate. Also, we cannot have floats in the kernel. I would consider a patch which tries to make the finger widths more accurate, but all in all, I think this problem is best solved in userland. Thanks, Henrik -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
