| Message ID | 1307735704-30673-2-git-send-email-derek.foreman@collabora.co.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Derek, > Some (multi-touch) devices are capable of reporting 1 finger at 80Hz or 2 fingers at 40Hz. > This property allows a user space driver to know that this can happen, and perform extrapolation to present the illusion of fluidity. Evdev events contain a timestamp, so any rate or rate variation can easily be detected in userspace. Thanks, Henrik -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index e06e045..40748e3 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -695,6 +695,7 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv) input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) { + __set_bit(INPUT_PROP_INCONSISTENT_RATE, dev->propbit); __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); input_mt_init_slots(dev, 2); input_set_abs_params(dev, ABS_MT_POSITION_X, XMIN_NOMINAL, diff --git a/include/linux/input.h b/include/linux/input.h index 771d6d8..f8a0c2d 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -137,6 +137,7 @@ struct input_keymap_entry { #define INPUT_PROP_DIRECT 0x01 /* direct input devices */ #define INPUT_PROP_BUTTONPAD 0x02 /* has button(s) under pad */ #define INPUT_PROP_SEMI_MT 0x03 /* touch rectangle only */ +#define INPUT_PROP_INCONSISTENT_RATE 0x05 /* device report rate changes */ #define INPUT_PROP_MAX 0x1f #define INPUT_PROP_CNT (INPUT_PROP_MAX + 1)
Some (multi-touch) devices are capable of reporting 1 finger at 80Hz or 2 fingers at 40Hz. This property allows a user space driver to know that this can happen, and perform extrapolation to present the illusion of fluidity. Signed-off-by: Derek Foreman <derek.foreman@collabora.co.uk> --- drivers/input/mouse/synaptics.c | 1 + include/linux/input.h | 1 + 2 files changed, 2 insertions(+), 0 deletions(-)