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Wed, 19 Aug 2026 02:39:45 -0700 (PDT) From: Ruzal Daminov To: jikos@kernel.org, bentiss@kernel.org Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Ruzal Daminov Subject: [PATCH v3] HID: multitouch: add support for Goodix GXTP7863 touchpad Date: Wed, 19 Aug 2026 12:39:38 +0300 Message-ID: <20260819093938.1387-1-daminovruzal7@gmail.com> X-Mailer: git-send-email 2.55.0.windows.4 In-Reply-To: <20260814171247.16707-1-daminovruzal7@gmail.com> References: <20260814171247.16707-1-daminovruzal7@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The Goodix GXTP7863 touchpad controller (VID: 0x27c6, PID: 0x01e0) found on Honor MagicBook laptops (e.g. FMI-76 / X14 Plus) was missing from the mt_devices[] table. As a result, it was claimed by hid-generic, which erroneously mapped the vendor telemetry collection (0xFF01) to an input node, translating the 1-Hz heartbeat timestamp into an endless loop of phantom KEY_BRIGHTNESSUP autorepeat events. Add the I2C_DEVICE_ID_GOODIX_01E0 definition to hid-ids.h and add the device to mt_devices[] with MT_CLS_DEFAULT so hid-multitouch claims the touchpad. Using MT_CLS_DEFAULT ensures export_all_inputs remains false (unlike MT_CLS_WIN_8 classes), allowing mt_input_mapping() to ignore the vendor telemetry collection (0xFF01) and eliminate the phantom input node. Tested on Honor MagicBook X14 Plus (FMI-76, AMD Ryzen 8845HS). Signed-off-by: Ruzal Daminov --- v2 -> v3: - Use MT_CLS_DEFAULT instead of MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU to ensure export_all_inputs remains false, allowing mt_input_mapping() to ignore the vendor telemetry collection (0xFF01) and eliminate the phantom input node. v1 -> v2: - Move entry to alphabetical order in the Goodix section. - Declare I2C_DEVICE_ID_GOODIX_01E0 in hid-ids.h instead of hardcoding. drivers/hid/hid-ids.h | 1 + drivers/hid/hid-multitouch.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index 1059922baaacd2..60d9d524cd2e15 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -562,6 +562,7 @@ #define USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100 0xe100 =20 #define I2C_VENDOR_ID_GOODIX 0x27c6 +#define I2C_DEVICE_ID_GOODIX_01E0 0x01e0 #define I2C_DEVICE_ID_GOODIX_01E8 0x01e8 #define I2C_DEVICE_ID_GOODIX_01E9 0x01e9 #define I2C_DEVICE_ID_GOODIX_01F0 0x01f0 diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index edb37b4c867e4b..ca0b40e6b8a83d 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -2460,6 +2460,11 @@ static const struct hid_device_id mt_devices[] =3D { MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL, USB_DEVICE_ID_GAMETEL_MT_MODE) }, =20 + /* Goodix GXTP7863 Touchpad */ + { .driver_data =3D MT_CLS_DEFAULT, + HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX, + I2C_DEVICE_ID_GOODIX_01E0) }, + /* Goodix GT7868Q devices */ { .driver_data =3D MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU, HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX, --=20 2.45.2