diff options
| author | Dylan Eray <dylan.eray6@gmail.com> | 2026-02-19 20:32:09 +0100 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2026-04-10 10:23:41 -0400 |
| commit | 67377cd38b89ce782ccdb83bda3f65a2def843cd (patch) | |
| tree | 8d70113e04b3861dc8938e2d58b19ec26e83350a /drivers/bluetooth | |
| parent | c0ad33d273ef1097b28421c3e8d19f52553f26e8 (diff) | |
| download | lwn-67377cd38b89ce782ccdb83bda3f65a2def843cd.tar.gz lwn-67377cd38b89ce782ccdb83bda3f65a2def843cd.zip | |
Bluetooth: btusb: Add Lite-On 04ca:3807 for MediaTek MT7921
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>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/btusb.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index aeba026bdb42..d07db8e3a79d 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -707,6 +707,8 @@ 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 | |