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@xxxxxxxxxxxxxxx>
---
drivers/input/mouse/synaptics.c | 1 +
include/linux/input.h | 1 +
2 files changed, 2 insertions(+), 0 deletions(-)
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)
--
1.7.5.3
--
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