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HID: wacom: Set a default resolution for older tablets
commit 08a46b4190
upstream.
Some older tablets may not report physical maximum for X/Y
coordinates. Set a default to prevent undefined resolution.
Signed-off-by: Ping Cheng <ping.cheng@wacom.com>
Link: https://lore.kernel.org/r/20230409164229.29777-1-ping.cheng@wacom.com
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
823787470e
commit
db587340a0
1 changed files with 10 additions and 2 deletions
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@ -1857,6 +1857,7 @@ static void wacom_map_usage(struct input_dev *input, struct hid_usage *usage,
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int fmax = field->logical_maximum;
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unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
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int resolution_code = code;
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int resolution = hidinput_calc_abs_res(field, resolution_code);
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if (equivalent_usage == HID_DG_TWIST) {
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resolution_code = ABS_RZ;
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@ -1877,8 +1878,15 @@ static void wacom_map_usage(struct input_dev *input, struct hid_usage *usage,
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switch (type) {
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case EV_ABS:
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input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
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input_abs_set_res(input, code,
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hidinput_calc_abs_res(field, resolution_code));
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/* older tablet may miss physical usage */
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if ((code == ABS_X || code == ABS_Y) && !resolution) {
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resolution = WACOM_INTUOS_RES;
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hid_warn(input,
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"Wacom usage (%d) missing resolution \n",
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code);
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}
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input_abs_set_res(input, code, resolution);
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break;
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case EV_KEY:
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case EV_MSC:
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