diff options
| -rw-r--r-- | drivers/hid/wacom_wac.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c index 4cfa51416dbc..0c6a82c665c1 100644 --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -1921,6 +1921,7 @@ static void wacom_map_usage(struct input_dev *input, struct hid_usage *usage, int fmax = field->logical_maximum; unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid); int resolution_code = code; + int resolution = hidinput_calc_abs_res(field, resolution_code); if (equivalent_usage == HID_DG_TWIST) { resolution_code = ABS_RZ; @@ -1941,8 +1942,15 @@ static void wacom_map_usage(struct input_dev *input, struct hid_usage *usage, switch (type) { case EV_ABS: input_set_abs_params(input, code, fmin, fmax, fuzz, 0); - input_abs_set_res(input, code, - hidinput_calc_abs_res(field, resolution_code)); + + /* older tablet may miss physical usage */ + if ((code == ABS_X || code == ABS_Y) && !resolution) { + resolution = WACOM_INTUOS_RES; + hid_warn(input, + "Wacom usage (%d) missing resolution \n", + code); + } + input_abs_set_res(input, code, resolution); break; case EV_KEY: case EV_MSC: |