From: Martin Luker-Brown <mlukerbrown@gmail.com>
To: linux-bluetooth@vger.kernel.org
Cc: Marcel Holtmann <marcel@holtmann.org>,
Johan Hedberg <johan.hedberg@gmail.com>,
Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Subject: [PATCH] Bluetooth: btusb: Add USB ID 13d3:3626 for RTL8851BE
Date: Sat, 12 Sep 2026 21:44:09 +0100 [thread overview]
Message-ID: <178924584937.116572.13159457162680472249@gmail.com> (raw)
Teach btusb to recognize another IMC Networks / Realtek RTL8851BE
Bluetooth radio variant.
Without BTUSB_REALTEK, the device enumerates and HCI comes up, but
btrtl never loads rtl8851bu_fw.bin, so discovery finds no devices.
/sys/kernel/debug/usb/devices reports for this device:
T: Bus=01 Lev=01 Prnt=01 Port=10 Cnt=02 Dev#= 3 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=13d3 ProdID=3626 Rev= 0.00
S: Manufacturer=Realtek
S: Product=Bluetooth Radio
S: SerialNumber=00e04c000001
C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
Tested on Dell Precision 7820 (Fedora 44, kernel 7.2.4) with the
combo RTL8851BE Wi-Fi/BT card. After the quirk, dmesg shows:
Bluetooth: hci0: RTL: examining hci_ver=0c hci_rev=000b lmp_ver=0c lmp_subver=8851
Bluetooth: hci0: RTL: loading rtl_bt/rtl8851bu_fw.bin
Bluetooth: hci0: RTL: fw version 0x048ad230
and LE discovery/pairing works (Logitech M720 Triathlon).
Signed-off-by: Martin Luker-Brown <mlukerbrown@gmail.com>
---
drivers/bluetooth/btusb.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 83d122de5..91e739c96 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -549,6 +549,7 @@ static const struct usb_device_id quirks_table[] = {
{ USB_DEVICE(0x0bda, 0xb850), .driver_info = BTUSB_REALTEK },
{ USB_DEVICE(0x13d3, 0x3600), .driver_info = BTUSB_REALTEK },
{ USB_DEVICE(0x13d3, 0x3601), .driver_info = BTUSB_REALTEK },
+ { USB_DEVICE(0x13d3, 0x3626), .driver_info = BTUSB_REALTEK },
{ USB_DEVICE(0x0489, 0xe112), .driver_info = BTUSB_REALTEK |
BTUSB_WIDEBAND_SPEECH },
--
2.53.0
next reply other threads:[~2026-09-12 20:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-12 20:44 Martin Luker-Brown [this message]
2026-09-12 22:19 ` Bluetooth: btusb: Add USB ID 13d3:3626 for RTL8851BE bluez.test.bot
2026-09-13 6:38 ` [PATCH v2] " Martin Luker-Brown
2026-09-13 12:26 ` [v2] " bluez.test.bot
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