linux-kernel - [PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

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Message-ID: <20250923022445.3276026-1-zhangheng@kylinos.cn>
Date: Tue, 23 Sep 2025 10:24:45 +0800
From: Zhang Heng <zhangheng@...inos.cn>
To: jikos@...nel.org,
	bentiss@...nel.org,
	staffan.melin@...illator.se
Cc: linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Zhang Heng <zhangheng@...inos.cn>
Subject: [PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

Multiple USB devices have the same ID;
add device descriptors to distinguish them.

Fixes: 1a8953f4f774 ("HID: Add IGNORE quirk for SMARTLINKTECHNOLOGY")
Tested-by: staffan.melin@...illator.se
Signed-off-by: Zhang Heng <zhangheng@...inos.cn>
---
 drivers/hid/hid-quirks.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index ffd034566e2e..d28b180abd72 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -913,7 +913,6 @@ static const struct hid_device_id hid_ignore_list[] = {
 #endif
 	{ HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_HP_5MP_CAMERA_5473) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_SMARTLINKTECHNOLOGY, USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155) },
 	{ }
 };
 
@@ -1062,6 +1061,17 @@ bool hid_ignore(struct hid_device *hdev)
 					     strlen(elan_acpi_id[i].id)))
 					return true;
 		break;
+	case USB_VENDOR_ID_SMARTLINKTECHNOLOGY:
+		/* Multiple USB devices with identical IDs (mic & touchscreen).
+		 * The touch screen requires hid core processing, but the
+		 * microphone does not. They can be distinguished by manufacturer
+		 * and serial number.
+		 */
+		if (hdev->product == USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155 &&
+		    strncmp(hdev->name, "SmartlinkTechnology", 19) == 0 &&
+		    strncmp(hdev->uniq, "20201111000001", 14) == 0)
+			return true;
+		break;
 	}
 
 	if (hdev->type == HID_TYPE_USBMOUSE &&
-- 
2.47.1