Commit 08a46b41 authored by Ping Cheng's avatar Ping Cheng Committed by Benjamin Tissoires

HID: wacom: Set a default resolution for older tablets

Some older tablets may not report physical maximum for X/Y
coordinates. Set a default to prevent undefined resolution.
Signed-off-by: default avatarPing Cheng <ping.cheng@wacom.com>
Link: https://lore.kernel.org/r/20230409164229.29777-1-ping.cheng@wacom.comSigned-off-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
parent 17d793f3
......@@ -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:
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment