[PATCH] Bluetooth: btusb: Add support for 2c4e:0115 (Mercusys MA530)

[PATCH] Bluetooth: btusb: Add support for 2c4e:0115 (Mercusys MA530)

[Edo Akse]

Add USB ID 2c4e:0115 for the Mercusys MA530 which is a
Realtek RTL8761BU-based Bluetooth adapter.

Signed-off-by: Edo Akse <edo@akse.cloud>
---
 drivers/bluetooth/btusb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index fcec8e589e81..a52e05062199 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -802,6 +802,8 @@ static const struct usb_device_id quirks_table[] = {
 						     BTUSB_WIDEBAND_SPEECH },
 	{ USB_DEVICE(0x2b89, 0x6275), .driver_info = BTUSB_REALTEK |
 						     BTUSB_WIDEBAND_SPEECH },
+	{ USB_DEVICE(0x2c4e, 0x0115), .driver_info = BTUSB_REALTEK |
+						     BTUSB_WIDEBAND_SPEECH },
 
 	/* Additional Realtek 8821AE Bluetooth devices */
 	{ USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
-- 
2.51.0

RE: Bluetooth: btusb: Add support for 2c4e:0115 (Mercusys MA530)

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 3533 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=1054221

---Test result---

Test Summary:
CheckPatch                    PENDING   0.38 seconds
GitLint                       PENDING   0.28 seconds
SubjectPrefix                 PASS      0.08 seconds
BuildKernel                   PASS      26.04 seconds
CheckAllWarning               PASS      28.83 seconds
CheckSparse                   WARNING   32.52 seconds
BuildKernel32                 PASS      25.27 seconds
TestRunnerSetup               PASS      564.13 seconds
TestRunner_l2cap-tester       PASS      31.05 seconds
TestRunner_iso-tester         PASS      99.38 seconds
TestRunner_bnep-tester        PASS      6.43 seconds
TestRunner_mgmt-tester        FAIL      126.39 seconds
TestRunner_rfcomm-tester      PASS      9.51 seconds
TestRunner_sco-tester         FAIL      14.84 seconds
TestRunner_ioctl-tester       PASS      10.24 seconds
TestRunner_mesh-tester        FAIL      12.50 seconds
TestRunner_smp-tester         PASS      8.72 seconds
TestRunner_userchan-tester    PASS      6.74 seconds
IncrementalBuild              PENDING   0.62 seconds

Details
##############################
Test: CheckPatch - PENDING
Desc: Run checkpatch.pl script
Output:

##############################
Test: GitLint - PENDING
Desc: Run gitlint
Output:

##############################
Test: CheckSparse - WARNING
Desc: Run sparse tool with linux kernel
Output:
drivers/bluetooth/btusb.c:4661:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4662:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4664:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4665:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4667:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4668:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4670:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4671:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4673:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4674:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4675:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4676:1: error: bad constant expressiondrivers/bluetooth/btusb.c:4676:1: error: bad constant expression
##############################
Test: TestRunner_mgmt-tester - FAIL
Desc: Run mgmt-tester with test-runner
Output:
Total: 494, Passed: 489 (99.0%), Failed: 1, Not Run: 4

Failed Test Cases
Read Exp Feature - Success                           Failed       0.110 seconds
##############################
Test: TestRunner_sco-tester - FAIL
Desc: Run sco-tester with test-runner
Output:
WARNING: possible circular locking dependency detected
BUG: sleeping function called from invalid context at net/core/sock.c:3782
Total: 30, Passed: 30 (100.0%), Failed: 0, Not Run: 0
##############################
Test: TestRunner_mesh-tester - FAIL
Desc: Run mesh-tester with test-runner
Output:
Total: 10, Passed: 8 (80.0%), Failed: 2, Not Run: 0

Failed Test Cases
Mesh - Send cancel - 1                               Timed out    2.651 seconds
Mesh - Send cancel - 2                               Timed out    1.994 seconds
##############################
Test: IncrementalBuild - PENDING
Desc: Incremental build with the patches in the series
Output:



---
Regards,
Linux Bluetooth

Re: [PATCH] Bluetooth: btusb: Add support for 2c4e:0115 (Mercusys MA530)

[Daniele Quasimodo]

Tested-by: Daniele Quasimodo <daniele.quasimodo@arke.cc>

I can confirm this patch fixes the issue on my Mercusys MA530
(VID:PID 2c4e:0115, RTL8761BU).

Before applying the patch, firmware (rtl8761bu_fw.bin) was not loaded
properly and LE discovery was continuously toggling on and off.

After applying the patch, firmware loads correctly and the device
operates reliably. I tested classic Bluetooth audio as well as BLE
scanning and connections without issues.

Given that this change only adds a USB device ID enabling already
supported hardware, it might also be suitable for stable backporting.

On 14/02/2026 22:57, Edo Akse wrote:
> Add USB ID 2c4e:0115 for the Mercusys MA530 which is a
> Realtek RTL8761BU-based Bluetooth adapter.
>
> Signed-off-by: Edo Akse <edo@akse.cloud>
> ---
>   drivers/bluetooth/btusb.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index fcec8e589e81..a52e05062199 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -802,6 +802,8 @@ static const struct usb_device_id quirks_table[] = {
>   						     BTUSB_WIDEBAND_SPEECH },
>   	{ USB_DEVICE(0x2b89, 0x6275), .driver_info = BTUSB_REALTEK |
>   						     BTUSB_WIDEBAND_SPEECH },
> +	{ USB_DEVICE(0x2c4e, 0x0115), .driver_info = BTUSB_REALTEK |
> +						     BTUSB_WIDEBAND_SPEECH },
>   
>   	/* Additional Realtek 8821AE Bluetooth devices */
>   	{ USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },