Input: synaptics - report multi-taps only 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>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 10 insertions, 6 deletions

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index d349c4a5e3e8..865fc69e9bc3 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);