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Subject[PATCH] Input: synaptics - Only report double/triple tap if supported by the device.
According to Section 2.4.4 of the Synaptics TouchPad Interfacing Guide, bit 2
specifies if multi-finger detection is provided by the touchpad. Thus, only
set BTN_TOOL_DOUBLETAP and BTN_TOOL_TRIPLETAP if the device actually supports
it.

Signed-off-by: Peter Hutterer <peter.hutterer@redhat.com>
---
drivers/input/mouse/synaptics.c | 16 ++++++++++------
1 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index d349c4a..865fc69 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -445,12 +445,14 @@ static void synaptics_process_packet(struct psmouse *psmouse)

input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
- input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
- input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
-
input_report_key(dev, BTN_LEFT, hw.left);
input_report_key(dev, BTN_RIGHT, hw.right);

+ if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
+ input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
+ input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
+ }
+
if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
input_report_key(dev, BTN_MIDDLE, hw.middle);

@@ -543,12 +545,14 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
set_bit(EV_KEY, dev->evbit);
set_bit(BTN_TOUCH, dev->keybit);
set_bit(BTN_TOOL_FINGER, dev->keybit);
- set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
- set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
-
set_bit(BTN_LEFT, dev->keybit);
set_bit(BTN_RIGHT, dev->keybit);

+ if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
+ set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
+ set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
+ }
+
if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
set_bit(BTN_MIDDLE, dev->keybit);

--
1.6.0.3

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