[v1] Bluetooth: btusb: Add Lite-On 04ca:3807 for MediaTek MT7921

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

Posted by Dylan Eray 1 month, 1 week ago

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

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

Posted by Paul Menzel 1 month, 1 week ago

Dear Dylan,


Thank you for your patch.

Am 19.02.26 um 20:11 schrieb 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

It’s common to add

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

and paste the relevant output into the commit message.

> 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 |

The diff looks good.

With the changes above, feel free to add:

Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>


Kind regards,

Paul