* [PATCH] Bluetooth: btusb: Add Realtek RTL8852BE BT 0x04c5/0x1670 (Fujitsu)
@ 2026-05-18 19:16 Jaroslav Srba
2026-05-18 20:28 ` bluez.test.bot
2026-05-18 21:03 ` [PATCH v2] " Jaroslav Srba
0 siblings, 2 replies; 4+ messages in thread
From: Jaroslav Srba @ 2026-05-18 19:16 UTC (permalink / raw)
To: marcel, luiz.dentz; +Cc: linux-bluetooth, linux-kernel, jarys.cz
The Fujitsu LIFEBOOK E5512A ships with a Realtek RTL8852BE combo chip
whose Bluetooth half is exposed as a Fujitsu-rebranded USB device
0x04c5/0x1670. Without this entry in quirks_table, btusb binds via the
generic Bluetooth class match but never sets the BTUSB_REALTEK quirk,
so btrtl_setup_realtek() is never called and the rtl8852bu firmware
patch is never loaded. As a result HCI works (hci0 UP RUNNING), but
RF reception is non-functional: inquiry and LE scan find nothing and
pairing is impossible.
Other Fujitsu OEM rebrands of Realtek chips are already in quirks_table
(0x04c5/0x165c, 0x04c5/0x1675, 0x04c5/0x161f). Add 0x04c5/0x1670 in
the same "Realtek 8852BE Bluetooth devices" block, alongside 0x04c5/0x165c.
USB descriptors of the device:
Bus 001 Device 004: ID 04c5:1670 Fujitsu, Ltd Bluetooth Radio
bDeviceClass 224 Wireless
bDeviceSubClass 1 Radio Frequency
bDeviceProtocol 1 Bluetooth
iManufacturer 1 Realtek
iProduct 2 Bluetooth Radio
Tested on Fujitsu LIFEBOOK E5512A (Ryzen 7 PRO 5875U, Ubuntu 25.10,
kernel 6.17.0-29-generic). After the patch:
Bluetooth: hci0: RTL: examining hci_ver=0b hci_rev=000b lmp_ver=0b lmp_subver=8852
Bluetooth: hci0: RTL: rom_version status=0 version=1
Bluetooth: hci0: RTL: loading rtl_bt/rtl8852bu_fw.bin
Bluetooth: hci0: RTL: loading rtl_bt/rtl8852bu_config.bin
Bluetooth: hci0: RTL: fw version 0x098b154b
Bluetooth: hci0: AOSP extensions version v1.00
Scanning, pairing and A2DP audio playback to BT headphones all work
after the firmware patch is loaded.
Signed-off-by: Jaroslav Srba <jarys.cz@gmail.com>
---
drivers/bluetooth/btusb.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 7f5fce93d..93fcc02e0 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -543,6 +543,8 @@ static const struct usb_device_id quirks_table[] = {
BTUSB_WIDEBAND_SPEECH },
{ USB_DEVICE(0x04c5, 0x165c), .driver_info = BTUSB_REALTEK |
BTUSB_WIDEBAND_SPEECH },
+ { USB_DEVICE(0x04c5, 0x1670), .driver_info = BTUSB_REALTEK |
+ BTUSB_WIDEBAND_SPEECH },
{ USB_DEVICE(0x04ca, 0x4006), .driver_info = BTUSB_REALTEK |
BTUSB_WIDEBAND_SPEECH },
{ USB_DEVICE(0x0cb8, 0xc549), .driver_info = BTUSB_REALTEK |
--
2.51.0
^ permalink raw reply related [flat|nested] 4+ messages in thread* RE: Bluetooth: btusb: Add Realtek RTL8852BE BT 0x04c5/0x1670 (Fujitsu)
2026-05-18 19:16 [PATCH] Bluetooth: btusb: Add Realtek RTL8852BE BT 0x04c5/0x1670 (Fujitsu) Jaroslav Srba
@ 2026-05-18 20:28 ` bluez.test.bot
2026-05-18 21:03 ` [PATCH v2] " Jaroslav Srba
1 sibling, 0 replies; 4+ messages in thread
From: bluez.test.bot @ 2026-05-18 20:28 UTC (permalink / raw)
To: linux-bluetooth, jarys.cz
[-- Attachment #1: Type: text/plain, Size: 2305 bytes --]
This is automated email and please do not reply to this email!
Dear submitter,
Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=1096820
---Test result---
Test Summary:
CheckPatch FAIL 0.53 seconds
GitLint FAIL 0.20 seconds
SubjectPrefix PASS 0.06 seconds
BuildKernel PASS 26.63 seconds
CheckAllWarning PASS 28.96 seconds
CheckSparse PASS 27.75 seconds
BuildKernel32 PASS 25.61 seconds
TestRunnerSetup PASS 565.04 seconds
IncrementalBuild PASS 25.41 seconds
Details
##############################
Test: CheckPatch - FAIL
Desc: Run checkpatch.pl script
Output:
Bluetooth: btusb: Add Realtek RTL8852BE BT 0x04c5/0x1670 (Fujitsu)
WARNING: Prefer a maximum 75 chars per line (possible unwrapped commit description?)
#123:
Bluetooth: hci0: RTL: examining hci_ver=0b hci_rev=000b lmp_ver=0b lmp_subver=8852
total: 0 errors, 1 warnings, 8 lines checked
NOTE: For some of the reported defects, checkpatch may be able to
mechanically convert to the typical style using --fix or --fix-inplace.
/github/workspace/src/patch/14579881.patch has style problems, please review.
NOTE: Ignored message types: UNKNOWN_COMMIT_ID
NOTE: If any of the errors are false positives, please report
them to the maintainer, see CHECKPATCH in MAINTAINERS.
##############################
Test: GitLint - FAIL
Desc: Run gitlint
Output:
Bluetooth: btusb: Add Realtek RTL8852BE BT 0x04c5/0x1670 (Fujitsu)
WARNING: I3 - ignore-body-lines: gitlint will be switching from using Python regex 'match' (match beginning) to 'search' (match anywhere) semantics. Please review your ignore-body-lines.regex option accordingly. To remove this warning, set general.regex-style-search=True. More details: https://jorisroovers.github.io/gitlint/configuration/#regex-style-search
28: B1 Line exceeds max length (84>80): " Bluetooth: hci0: RTL: examining hci_ver=0b hci_rev=000b lmp_ver=0b lmp_subver=8852"
https://github.com/bluez/bluetooth-next/pull/210
---
Regards,
Linux Bluetooth
^ permalink raw reply [flat|nested] 4+ messages in thread* [PATCH v2] Bluetooth: btusb: Add Realtek RTL8852BE BT 0x04c5/0x1670 (Fujitsu)
2026-05-18 19:16 [PATCH] Bluetooth: btusb: Add Realtek RTL8852BE BT 0x04c5/0x1670 (Fujitsu) Jaroslav Srba
2026-05-18 20:28 ` bluez.test.bot
@ 2026-05-18 21:03 ` Jaroslav Srba
2026-05-18 21:45 ` [v2] " bluez.test.bot
1 sibling, 1 reply; 4+ messages in thread
From: Jaroslav Srba @ 2026-05-18 21:03 UTC (permalink / raw)
To: marcel, luiz.dentz; +Cc: linux-bluetooth, linux-kernel, jarys.cz
The Fujitsu LIFEBOOK E5512A ships with a Realtek RTL8852BE combo chip
whose Bluetooth half is exposed as a Fujitsu-rebranded USB device
0x04c5/0x1670. Without this entry in quirks_table, btusb binds via the
generic Bluetooth class match but never sets the BTUSB_REALTEK quirk,
so btrtl_setup_realtek() is never called and the rtl8852bu firmware
patch is never loaded. As a result HCI works (hci0 UP RUNNING), but
RF reception is non-functional: inquiry and LE scan find nothing and
pairing is impossible.
Other Fujitsu OEM rebrands of Realtek chips are already in quirks_table
(0x04c5/0x165c, 0x04c5/0x1675, 0x04c5/0x161f). Add 0x04c5/0x1670 in
the same "Realtek 8852BE Bluetooth devices" block, alongside 0x04c5/0x165c.
USB descriptors of the device:
Bus 001 Device 004: ID 04c5:1670 Fujitsu, Ltd Bluetooth Radio
bDeviceClass 224 Wireless
bDeviceSubClass 1 Radio Frequency
bDeviceProtocol 1 Bluetooth
iManufacturer 1 Realtek
iProduct 2 Bluetooth Radio
Tested on Fujitsu LIFEBOOK E5512A (Ryzen 7 PRO 5875U, Ubuntu 25.10,
kernel 6.17.0-29-generic). After the patch:
Bluetooth: hci0: RTL: rom_version status=0 version=1
Bluetooth: hci0: RTL: loading rtl_bt/rtl8852bu_fw.bin
Bluetooth: hci0: RTL: loading rtl_bt/rtl8852bu_config.bin
Bluetooth: hci0: RTL: fw version 0x098b154b
Bluetooth: hci0: AOSP extensions version v1.00
Scanning, pairing and A2DP audio playback to BT headphones all work
after the firmware patch is loaded.
Signed-off-by: Jaroslav Srba <jarys.cz@gmail.com>
---
Changes in v2:
- Drop a long "RTL: examining hci_ver=..." line from the commit body
to satisfy checkpatch/gitlint 75-char limit. Chip identification is
conveyed by the firmware filename (rtl8852bu_fw.bin) and the
subsequent rom_version line, so no information is lost.
drivers/bluetooth/btusb.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 7f5fce93d..93fcc02e0 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -543,6 +543,8 @@ static const struct usb_device_id quirks_table[] = {
BTUSB_WIDEBAND_SPEECH },
{ USB_DEVICE(0x04c5, 0x165c), .driver_info = BTUSB_REALTEK |
BTUSB_WIDEBAND_SPEECH },
+ { USB_DEVICE(0x04c5, 0x1670), .driver_info = BTUSB_REALTEK |
+ BTUSB_WIDEBAND_SPEECH },
{ USB_DEVICE(0x04ca, 0x4006), .driver_info = BTUSB_REALTEK |
BTUSB_WIDEBAND_SPEECH },
{ USB_DEVICE(0x0cb8, 0xc549), .driver_info = BTUSB_REALTEK |
--
2.51.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2026-05-18 21:45 UTC | newest]
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2026-05-18 19:16 [PATCH] Bluetooth: btusb: Add Realtek RTL8852BE BT 0x04c5/0x1670 (Fujitsu) Jaroslav Srba
2026-05-18 20:28 ` bluez.test.bot
2026-05-18 21:03 ` [PATCH v2] " Jaroslav Srba
2026-05-18 21:45 ` [v2] " bluez.test.bot
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