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authorAlistair Francis <alistair@alistair23.me>2021-12-08 15:40:43 +0300
committerBenjamin Tissoires <benjamin.tissoires@redhat.com>2021-12-14 13:37:52 +0300
commitfd8d135b2c5e88662f2729e034913f183455a667 (patch)
treef3189f25476079767c95732a99cd7633c96dd408 /drivers/hid
parent9ea1b35f63dde3c8ff7f1fd8fee3a46c3d5583a9 (diff)
downloadlinux-fd8d135b2c5e88662f2729e034913f183455a667.tar.xz
HID: quirks: Allow inverting the absolute X/Y values
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
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-input.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 4186143da7c6..5f357dddcc01 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -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)