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Message-Id: <20211202115622.40153-2-alistair@alistair23.me>
Date: Thu, 2 Dec 2021 21:56:20 +1000
From: Alistair Francis <alistair@...stair23.me>
To: benjamin.tissoires@...hat.com, shawnguo@...nel.org,
s.hauer@...gutronix.de, dmitry.torokhov@...il.com
Cc: Ping.Cheng@...om.com, linux-arm-kernel@...ts.infradead.org,
linux-imx@....com, alistair23@...il.com,
tatsunosuke.tobita@...om.com, linux-input@...r.kernel.org,
Jason.Gerecke@...om.com, linux-kernel@...r.kernel.org,
jikos@...nel.org, martin.chen@...om.com,
devicetree@...r.kernel.org,
Alistair Francis <alistair@...stair23.me>
Subject: [PATCH v15 1/3] 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@...stair23.me>
---
drivers/hid/hid-input.c | 6 ++++++
include/linux/hid.h | 2 ++
2 files changed, 8 insertions(+)
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 217f2d1b91c5..83ee803186a1 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1331,6 +1331,12 @@ 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 9e067f937dbc..4959385ca588 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -349,6 +349,8 @@ 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)
--
2.31.1
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