This is a note to let you know that I've just added the patch titled
HID: quirks: Allow inverting the absolute X/Y values
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hid-quirks-allow-inverting-the-absolute-x-y-values.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b5c962ac12a9280decf07fa02f5f1f6d91c760fc
Author: Alistair Francis <alistair@xxxxxxxxxxxxx>
Date: Wed Dec 8 22:40:43 2021 +1000
HID: quirks: Allow inverting the absolute X/Y values
[ Upstream commit fd8d135b2c5e88662f2729e034913f183455a667 ]
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@xxxxxxxxxxxxx>
[bentiss: silence checkpatch warning]
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20211208124045.61815-2-alistair@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 580d378342c41..eb53855898c8d 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1288,6 +1288,12 @@ 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)
diff --git a/include/linux/hid.h b/include/linux/hid.h
index fc56d53cc68bf..2ba33d708942c 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -345,6 +345,8 @@ 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)
