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HID: quirks: Allow inverting the absolute X/Y values

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Add a HID_QUIRK_X_INVERT/HID_QUIRK_Y_INVERT quirk that can be used
to invert the X/Y values.

Signed-off-by: Alistair Francis <alistair@alistair23.me>
[bentiss: silence checkpatch warning]
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211208124045.61815-2-alistair@alistair23.me
This commit is contained in:
Alistair Francis 2021-12-08 22:40:43 +10:00 committed by Benjamin Tissoires
parent 9ea1b35f63
commit fd8d135b2c
2 changed files with 8 additions and 0 deletions
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6
drivers/hid/hid-input.c
View File

@ -1329,6 +1329,12 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
input = field->hidinput->input;
if (usage->type == EV_ABS &&
(((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))) {
value = field->logical_maximum - value;
}
if (usage->hat_min < usage->hat_max || usage->hat_dir) {
int hat_dir = usage->hat_dir;
if (!hat_dir)

2
include/linux/hid.h
View File

@ -359,6 +359,8 @@ struct hid_item {
/* BIT(9) reserved for backward compatibility, was NO_INIT_INPUT_REPORTS */
#define HID_QUIRK_ALWAYS_POLL BIT(10)
#define HID_QUIRK_INPUT_PER_APP BIT(11)
#define HID_QUIRK_X_INVERT BIT(12)
#define HID_QUIRK_Y_INVERT BIT(13)
#define HID_QUIRK_SKIP_OUTPUT_REPORTS BIT(16)
#define HID_QUIRK_SKIP_OUTPUT_REPORT_ID BIT(17)
#define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP BIT(18)