[PATCH v2] Bluetooth: btusb: Add Lite-On 04ca:3807 for MediaTek MT7921

[PATCH v2] Bluetooth: btusb: Add Lite-On 04ca:3807 for MediaTek MT7921

[Dylan Eray]

Add USB device ID (04ca:3807) for a Lite-On Wireless_Device containing
a MediaTek MT7921 (MT7920) Bluetooth chipset found in Acer laptops.

Without this entry, btusb binds via the generic USB class-based wildcard
match but never sets the BTUSB_MEDIATEK flag. This means btmtk never
triggers firmware loading, and the driver sends a raw HCI Reset that
the uninitialized chip cannot respond to, resulting in:

  Bluetooth: hci0: Opcode 0x0c03 failed: -110

The information in /sys/kernel/debug/usb/devices about the Bluetooth
device is listed as the below:

T:  Bus=03 Lev=01 Prnt=01 Port=09 Cnt=01 Dev#=5 Spd=480 MxCh=0
P:  Vendor=04ca ProdID=3807 Rev=1.00
S:  Manufacturer=MediaTek Inc.
S:  Product=Wireless_Device
S:  SerialNumber=000000000
C:  #Ifs= 3 Cfg#= 1 Atr=e0 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
I:  If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
I:  If#= 2 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)

Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Dylan Eray <dylan.eray6@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 fcec8e5..fd637cf 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -705,6 +705,8 @@ static const struct usb_device_id quirks_table[] = {
 						     BTUSB_WIDEBAND_SPEECH },
 	{ USB_DEVICE(0x04ca, 0x3804), .driver_info = BTUSB_MEDIATEK |
 						     BTUSB_WIDEBAND_SPEECH },
+	{ USB_DEVICE(0x04ca, 0x3807), .driver_info = BTUSB_MEDIATEK |
+						     BTUSB_WIDEBAND_SPEECH },
 	{ USB_DEVICE(0x04ca, 0x38e4), .driver_info = BTUSB_MEDIATEK |
 						     BTUSB_WIDEBAND_SPEECH },
 	{ USB_DEVICE(0x13d3, 0x3568), .driver_info = BTUSB_MEDIATEK |
-- 
2.53.0

RE: [v2] Bluetooth: btusb: Add Lite-On 04ca:3807 for MediaTek MT7921

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 3536 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=1055646

---Test result---

Test Summary:
CheckPatch                    PENDING   0.50 seconds
GitLint                       PENDING   0.31 seconds
SubjectPrefix                 PASS      0.07 seconds
BuildKernel                   PASS      29.96 seconds
CheckAllWarning               PASS      32.80 seconds
CheckSparse                   WARNING   37.34 seconds
BuildKernel32                 PASS      29.94 seconds
TestRunnerSetup               PASS      575.93 seconds
TestRunner_l2cap-tester       PASS      28.84 seconds
TestRunner_iso-tester         PASS      107.19 seconds
TestRunner_bnep-tester        PASS      6.48 seconds
TestRunner_mgmt-tester        FAIL      125.64 seconds
TestRunner_rfcomm-tester      PASS      10.47 seconds
TestRunner_sco-tester         FAIL      16.50 seconds
TestRunner_ioctl-tester       PASS      11.71 seconds
TestRunner_mesh-tester        FAIL      12.56 seconds
TestRunner_smp-tester         PASS      10.03 seconds
TestRunner_userchan-tester    PASS      7.62 seconds
IncrementalBuild              PENDING   1.04 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       0.107 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    2.127 seconds
Mesh - Send cancel - 2                               Timed out    2.000 seconds
##############################
Test: IncrementalBuild - PENDING
Desc: Incremental build with the patches in the series
Output:



---
Regards,
Linux Bluetooth

Re: [PATCH v2] Bluetooth: btusb: Add Lite-On 04ca:3807 for MediaTek MT7921

[patchwork-bot+bluetooth]

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Thu, 19 Feb 2026 20:32:09 +0100 you wrote:
> Add USB device ID (04ca:3807) for a Lite-On Wireless_Device containing
> a MediaTek MT7921 (MT7920) Bluetooth chipset found in Acer laptops.
> 
> Without this entry, btusb binds via the generic USB class-based wildcard
> match but never sets the BTUSB_MEDIATEK flag. This means btmtk never
> triggers firmware loading, and the driver sends a raw HCI Reset that
> the uninitialized chip cannot respond to, resulting in:
> 
> [...]

Here is the summary with links:
  - [v2] Bluetooth: btusb: Add Lite-On 04ca:3807 for MediaTek MT7921
    https://git.kernel.org/bluetooth/bluetooth-next/c/79e029818394

You are awesome, thank you!
-- 
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