[PATCH 03/12] Input: synaptics - fix minimum reported ABS_TOOL_WIDTH

djkurtz
2011-06-29T05:08:47Z

From: Daniel Kurtz <djkurtz@chromium.org>

Synaptics touchpads report a 'w' value in each data report.
For touchpads that support palm detection, when there is a single finger
on the pad, the 'w' value reports its width in the range 4 to 15.
Thus, the minimum valid width is 4.

Note: Other values of 'w' are used to report special conditions:
w=0: 2 fingers are on the pad
w=1: 3 or more fingers are on the pad
w=2: the packet contains "Advanced Gesture Mode" data.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
---
drivers/input/mouse/synaptics.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index f6d0c04..a4b7801 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -706,7 +706,7 @@ static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
}

if (SYN_CAP_PALMDETECT(priv->capabilities))
- input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
+ input_set_abs_params(dev, ABS_TOOL_WIDTH, 4, 15, 0, 0);

__set_bit(EV_KEY, dev->evbit);
__set_bit(BTN_TOUCH, dev->keybit);
--
1.7.3.1