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Commit 1af9e1d4 authored by Alistair Francis's avatar Alistair Francis Committed by Greg Kroah-Hartman
Browse files

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: default avatarAlistair Francis <alistair@alistair23.me>
[bentiss: silence checkpatch warning]
Signed-off-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211208124045.61815-2-alistair@alistair23.me


Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 75f7885d

drivers/hid/hid-input.c

+6 −0
Original line number Diff line number Diff line
@@ -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)

include/linux/hid.h

+2 −0
Original line number Diff line number Diff line
@@ -344,6 +344,8 @@ 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)