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[100.36.128.72]) by smtp.googlemail.com with ESMTPSA id 6a1803df08f44-88652b4b017sm117055356d6.30.2025.12.02.18.36.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Dec 2025 18:36:14 -0800 (PST) From: Brian Howard To: jikos@kernel.org Cc: Brian Howard , Kris Fredrick , Andrei Shumailov , Benjamin Tissoires , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] HID: multitouch: add quirks for Lenovo Yoga Book 9i Date: Tue, 2 Dec 2025 21:35:47 -0500 Message-ID: <20251203023601.1657343-1-blhoward2@gmail.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <6243251s-2rp7-7092-r489-1n4531qn0826@xreary.bet> References: <6243251s-2rp7-7092-r489-1n4531qn0826@xreary.bet> 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 Lenovo Yoga Book 9i is a dual-screen laptop, with a single composite USB device providing both touch and tablet interfaces for both screens. All inputs report through a single device, differentiated solely by report numbers. As there is no way for udev to differentiate the inputs based on USB vendor/product ID or interface numbers, custom naming is required to match against for downstream configuration. A firmware bug also results in an erroneous InRange message report being received after the stylus leaves proximity, blocking later touch events. Add required quirks for Gen 8 to Gen 10 models, including a new quirk providing for custom input device naming and dropping erroneous InRange reports. Signed-off-by: Brian Howard Tested-by: Brian Howard Tested-by: Kris Fredrick Reported-by: Andrei Shumailov Closes: https://bugzilla.kernel.org/show_bug.cgi?id=3D220386 --- V1->V2 Changes: - Changed definition of f and i varliables to the loop scope. drivers/hid/hid-ids.h | 1 + drivers/hid/hid-multitouch.c | 72 ++++++++++++++++++++++++++++++++++++ 2 files changed, 73 insertions(+) diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index 0723b4b1c9ec..e896a6310bb2 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -833,6 +833,7 @@ #define USB_DEVICE_ID_LENOVO_X1_TAB3 0x60b5 #define USB_DEVICE_ID_LENOVO_X12_TAB 0x60fe #define USB_DEVICE_ID_LENOVO_X12_TAB2 0x61ae +#define USB_DEVICE_ID_LENOVO_YOGABOOK9I 0x6161 #define USB_DEVICE_ID_LENOVO_OPTICAL_USB_MOUSE_600E 0x600e #define USB_DEVICE_ID_LENOVO_PIXART_USB_MOUSE_608D 0x608d #define USB_DEVICE_ID_LENOVO_PIXART_USB_MOUSE_6019 0x6019 diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index 179dc316b4b5..4b3e7c212a48 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -76,6 +76,7 @@ MODULE_LICENSE("GPL"); #define MT_QUIRK_DISABLE_WAKEUP BIT(21) #define MT_QUIRK_ORIENTATION_INVERT BIT(22) #define MT_QUIRK_APPLE_TOUCHBAR BIT(23) +#define MT_QUIRK_YOGABOOK9I BIT(24) =20 #define MT_INPUTMODE_TOUCHSCREEN 0x02 #define MT_INPUTMODE_TOUCHPAD 0x03 @@ -229,6 +230,7 @@ static void mt_post_parse(struct mt_device *td, struct = mt_application *app); #define MT_CLS_RAZER_BLADE_STEALTH 0x0112 #define MT_CLS_SMART_TECH 0x0113 #define MT_CLS_APPLE_TOUCHBAR 0x0114 +#define MT_CLS_YOGABOOK9I 0x0115 #define MT_CLS_SIS 0x0457 =20 #define MT_DEFAULT_MAXCONTACT 10 @@ -424,6 +426,14 @@ static const struct mt_class mt_classes[] =3D { .quirks =3D MT_QUIRK_NOT_SEEN_MEANS_UP | MT_QUIRK_ALWAYS_VALID | MT_QUIRK_CONTACT_CNT_ACCURATE, + }, + { .name =3D MT_CLS_YOGABOOK9I, + .quirks =3D MT_QUIRK_ALWAYS_VALID | + MT_QUIRK_FORCE_MULTI_INPUT | + MT_QUIRK_SEPARATE_APP_REPORT | + MT_QUIRK_HOVERING | + MT_QUIRK_YOGABOOK9I, + .export_all_inputs =3D true }, { } }; @@ -1565,6 +1575,38 @@ static void mt_report(struct hid_device *hid, struct= hid_report *report) if (rdata && rdata->is_mt_collection) return mt_touch_report(hid, rdata); =20 + /* Lenovo Yoga Book 9i requires consuming and dropping certain bogus repo= rts */ + if (rdata && rdata->application && + (rdata->application->quirks & MT_QUIRK_YOGABOOK9I)) { + + bool all_zero_report =3D true; + + for (int f =3D 0; f < report->maxfield && all_zero_report; f++) { + struct hid_field *fld =3D report->field[f]; + + for (int i =3D 0; i < fld->report_count; i++) { + unsigned int usage =3D fld->usage[i].hid; + + if (usage =3D=3D HID_DG_INRANGE || + usage =3D=3D HID_DG_TIPSWITCH || + usage =3D=3D HID_DG_BARRELSWITCH || + usage =3D=3D HID_DG_BARRELSWITCH2 || + usage =3D=3D HID_DG_CONTACTID || + usage =3D=3D HID_DG_TILT_X || + usage =3D=3D HID_DG_TILT_Y) { + + if (fld->value[i] !=3D 0) { + all_zero_report =3D false; + break; + } + } + } + } + + if (all_zero_report) + return; + } + if (field && field->hidinput && field->hidinput->input) input_sync(field->hidinput->input); } @@ -1761,6 +1803,30 @@ static int mt_input_configured(struct hid_device *hd= ev, struct hid_input *hi) break; } =20 + /* Lenovo Yoga Book 9i requires custom naming to allow differentiation in= udev */ + if (hi->report && td->mtclass.quirks & MT_QUIRK_YOGABOOK9I) { + switch (hi->report->id) { + case 48: + suffix =3D "Touchscreen Top"; + break; + case 56: + suffix =3D "Touchscreen Bottom"; + break; + case 20: + suffix =3D "Stylus Top"; + break; + case 40: + suffix =3D "Stylus Bottom"; + break; + case 80: + suffix =3D "Emulated Touchpad"; + break; + default: + suffix =3D ""; + break; + } + } + if (suffix) { hi->input->name =3D devm_kasprintf(&hdev->dev, GFP_KERNEL, "%s %s", hdev->name, suffix); @@ -2266,6 +2332,12 @@ static const struct hid_device_id mt_devices[] =3D { USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X12_TAB2) }, =20 + /* Lenovo Yoga Book 9i */ + { .driver_data =3D MT_CLS_YOGABOOK9I, + HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, + USB_VENDOR_ID_LENOVO, + USB_DEVICE_ID_LENOVO_YOGABOOK9I) }, + /* Logitech devices */ { .driver_data =3D MT_CLS_NSMU, HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH_WIN_8, --=20 2.49.0