Report ABS_MT_PRESSURE in the bcm5974 driver with the same data used for ABS_PRESSURE. Some touchpad improvements in recent versions of libinput, such as pressure-based palm detection, will only work if ABS_MT_PRESSURE is reported. Signed-off-by: Ryan Hendrickson <ryan.hendrickson@xxxxxxxxxxxx> --- Please treat all of this with an extra grain of salt; this is my first real foray into both evdev/libinput internals and kernel development. That said, I have been running this patch on my daily-use MacBookPro5,1 for several months, so I have reason to believe it's stable. It might not be the ʽrightʼ way to do this though; I mostly just copied the corresponding code for ABS_PRESSURE, which from this[1] blog post I've inferred should have the same values and range. [1]: http://who-t.blogspot.com/2016/09/understanding-evdev.html Patch was originally submitted as bug 197909[2], which can be closed if this is accepted. [2]: https://bugzilla.kernel.org/show_bug.cgi?id=197909 --- linux-4.13/drivers/input/mouse/bcm5974.c.orig 2017-12-01 11:36:35.258890243 -0500 +++ linux-4.13/drivers/input/mouse/bcm5974.c 2017-12-01 11:48:55.187342210 -0500 @@ -548,6 +548,8 @@ static void setup_events_to_report(struc set_abs(input_dev, ABS_MT_POSITION_X, &cfg->x); set_abs(input_dev, ABS_MT_POSITION_Y, &cfg->y); + set_abs(input_dev, ABS_MT_PRESSURE, &cfg->p); + __set_bit(EV_KEY, input_dev->evbit); __set_bit(BTN_LEFT, input_dev->keybit); @@ -575,10 +577,14 @@ static int report_bt_state(struct bcm597 return 0; } -static void report_finger_data(struct input_dev *input, int slot, +static void report_finger_data(struct input_dev *input, + const struct bcm5974_config *cfg, + int slot, const struct input_mt_pos *pos, const struct tp_finger *f) { + int abs_p; + input_mt_slot(input, slot); input_mt_report_slot_state(input, MT_TOOL_FINGER, true); @@ -594,6 +600,9 @@ static void report_finger_data(struct in MAX_FINGER_ORIENTATION - raw2int(f->orientation)); input_report_abs(input, ABS_MT_POSITION_X, pos->x); input_report_abs(input, ABS_MT_POSITION_Y, pos->y); + + abs_p = clamp_val(256 * raw2int(f->touch_major) / cfg->p.max, 0, 255); + input_report_abs(input, ABS_MT_PRESSURE, abs_p); } static void report_synaptics_data(struct input_dev *input, @@ -640,7 +649,7 @@ static int report_tp_state(struct bcm597 input_mt_assign_slots(input, dev->slots, dev->pos, n, 0); for (i = 0; i < n; i++) - report_finger_data(input, dev->slots[i], + report_finger_data(input, c, dev->slots[i], &dev->pos[i], dev->index[i]); input_mt_sync_frame(input);
