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Sun, 02 Aug 2026 22:40:01 -0700 (PDT) Received: from u-ThinkPad-X1-Extreme-Gen-4i ([103.155.100.8]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49807bad893sm164022325e9.3.2026.08.02.22.39.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 02 Aug 2026 22:39:59 -0700 (PDT) From: Aaron Ma To: Jiri Kosina , Benjamin Tissoires , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] HID: quirks: Add ALWAYS_POLL quirk for Beitong BTP-KP20D dongle Date: Mon, 3 Aug 2026 13:39:32 +0800 Message-ID: <20260803053932.5897-1-mapengyu@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The BTP-KP20D dongle in Direct/HID mode (20dd:5159) re-enumerates every few seconds because usbhid never submits its interrupt-IN URB: no HID driver binds to the vendor-specific report descriptor, so the device is never opened, and the firmware treats the idle endpoint as a lost link. Add HID_QUIRK_ALWAYS_POLL to keep the interrupt-IN URB submitted from probe time. Signed-off-by: Aaron Ma --- drivers/hid/hid-ids.h | 3 +++ drivers/hid/hid-quirks.c | 1 + 2 files changed, 4 insertions(+) diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index 1059922baaacd..2bb4952d0b0c1 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -263,6 +263,9 @@ #define USB_VENDOR_ID_BAANTO 0x2453 #define USB_DEVICE_ID_BAANTO_MT_190W2 0x0100 +#define USB_VENDOR_ID_BEITONG 0x20dd +#define USB_DEVICE_ID_BEITONG_KP20D 0x5159 + #define USB_VENDOR_ID_BELKIN 0x050d #define USB_DEVICE_ID_FLIP_KVM 0x3201 diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c index 57d8efdd9b890..63283eb853f0f 100644 --- a/drivers/hid/hid-quirks.c +++ b/drivers/hid/hid-quirks.c @@ -45,6 +45,7 @@ static const struct hid_device_id hid_quirks[] = { { HID_USB_DEVICE(USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS682), HID_QUIRK_NOGET }, { HID_USB_DEVICE(USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS692), HID_QUIRK_NOGET }, { HID_USB_DEVICE(USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_UC100KM), HID_QUIRK_NOGET }, + { HID_USB_DEVICE(USB_VENDOR_ID_BEITONG, USB_DEVICE_ID_BEITONG_KP20D), HID_QUIRK_ALWAYS_POLL }, { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_MULTI_TOUCH), HID_QUIRK_MULTI_INPUT }, { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_PIXART_USB_OPTICAL_MOUSE), HID_QUIRK_ALWAYS_POLL }, { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_PIXART_USB_OPTICAL_MOUSE2), HID_QUIRK_ALWAYS_POLL }, -- 2.53.0