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Subject[PATCH 1/5] input: wacom: Add fuzz parameters to features
Date
The signal-to-noise ratio varies between devices, but currently all
devices are treated the same way. Add fuzz parameters to the feature
struct, allowing for tailored treatment of devices.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
---
drivers/input/tablet/wacom_sys.c | 6 +++++-
drivers/input/tablet/wacom_wac.c | 9 ++++++---
drivers/input/tablet/wacom_wac.h | 4 ++++
3 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index 42ba369..e510e4f 100644
--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -333,8 +333,12 @@ static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
struct usb_host_interface *interface = intf->cur_altsetting;
struct hid_descriptor *hid_desc;

- /* default device to penabled */
+ /* default features */
features->device_type = BTN_TOOL_PEN;
+ features->x_fuzz = 4;
+ features->y_fuzz = 4;
+ features->pressure_fuzz = 0;
+ features->distance_fuzz = 0;

/* only Tablet PCs need to retrieve the info */
if ((features->type != TABLETPC) && (features->type != TABLETPC2FG))
diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 40d77ba..bfe5654 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -951,9 +951,12 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,

__set_bit(BTN_TOUCH, input_dev->keybit);

- input_set_abs_params(input_dev, ABS_X, 0, features->x_max, 4, 0);
- input_set_abs_params(input_dev, ABS_Y, 0, features->y_max, 4, 0);
- input_set_abs_params(input_dev, ABS_PRESSURE, 0, features->pressure_max, 0, 0);
+ input_set_abs_params(input_dev, ABS_X, 0, features->x_max,
+ features->x_fuzz, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, features->y_max,
+ features->y_fuzz, 0);
+ input_set_abs_params(input_dev, ABS_PRESSURE, 0, features->pressure_max,
+ features->pressure_fuzz, 0);

__set_bit(ABS_MISC, input_dev->absbit);

diff --git a/drivers/input/tablet/wacom_wac.h b/drivers/input/tablet/wacom_wac.h
index 99e1a54..d769e9a 100644
--- a/drivers/input/tablet/wacom_wac.h
+++ b/drivers/input/tablet/wacom_wac.h
@@ -73,6 +73,10 @@ struct wacom_features {
int y_phy;
unsigned char unit;
unsigned char unitExpo;
+ int x_fuzz;
+ int y_fuzz;
+ int pressure_fuzz;
+ int distance_fuzz;
};

struct wacom_shared {
--
1.7.1


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