Input: wacom - pass touch resolution to clients through input_absinfo

Also remove fake ABS_RX/ABS_RY "axes" that were used to report physical
dimensions now that we have better way.

Signed-off-by: Ping Cheng <pingc@wacom.com>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 19 insertions, 2 deletions

diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index f44c822caac8..367fa82a607e 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -1101,6 +1101,13 @@ void wacom_setup_device_quirks(struct wacom_features *features)
         }
 }
 
+static unsigned int wacom_calculate_touch_res(unsigned int logical_max,
+                                              unsigned int physical_max)
+{
+       /* Touch physical dimensions are in 100th of mm */
+       return (logical_max * 100) / physical_max;
+}
+
 void wacom_setup_input_capabilities(struct input_dev *input_dev,
                                     struct wacom_wac *wacom_wac)
 {
@@ -1228,8 +1235,12 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
         case TABLETPC:
                 if (features->device_type == BTN_TOOL_DOUBLETAP ||
                     features->device_type == BTN_TOOL_TRIPLETAP) {
-                        input_set_abs_params(input_dev, ABS_RX, 0, features->x_phy, 0, 0);
-                        input_set_abs_params(input_dev, ABS_RY, 0, features->y_phy, 0, 0);
+                        input_abs_set_res(input_dev, ABS_X,
+                                wacom_calculate_touch_res(features->x_max,
+                                                        features->x_phy));
+                        input_abs_set_res(input_dev, ABS_Y,
+                                wacom_calculate_touch_res(features->y_max,
+                                                        features->y_phy));
                         __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
                 }
 
@@ -1272,6 +1283,12 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
                         input_set_abs_params(input_dev, ABS_MT_PRESSURE,
                                              0, features->pressure_max,
                                              features->pressure_fuzz, 0);
+                        input_abs_set_res(input_dev, ABS_X,
+                                wacom_calculate_touch_res(features->x_max,
+                                                        features->x_phy));
+                        input_abs_set_res(input_dev, ABS_Y,
+                                wacom_calculate_touch_res(features->y_max,
+                                                        features->y_phy));
                 } else if (features->device_type == BTN_TOOL_PEN) {
                         __set_bit(BTN_TOOL_RUBBER, input_dev->keybit);
                         __set_bit(BTN_TOOL_PEN, input_dev->keybit);