Hi Ian,
> 413c:8197 is a Dell-branded Broadcom BCM20702 device which requires
> the patch `BCM20702A1-413c-8197.hcd`[1] to be loaded in order for
> HSP/HFP functionality to work.
>
> Currently this device is listed early on in `btusb_table` as not
> requiring patchram. If that entry is removed the device is correctly
> handled by the later `USB_VENDOR_AND_INTERFACE_INFO` entry marking all
> Dell (413c) devices as requiring patchram.
>
> Patch:
>
> --
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index 5cbfbd948f6..2d24231f898 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -119,9 +119,6 @@ static const struct usb_device_id btusb_table[] = {
> /* Canyon CN-BTU1 with HID interfaces */
> { USB_DEVICE(0x0c10, 0x0000) },
>
> - /* Broadcom BCM20702A0 */
> - { USB_DEVICE(0x413c, 0x8197) },
> -
> /* Broadcom BCM20702B0 (Dynex/Insignia) */
> { USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },
>
> --
>
> Relevant slice of `/sys/kernel/debug/usb/devices`:
>
> --
> T: Bus=01 Lev=02 Prnt=02 Port=03 Cnt=02 Dev#= 4 Spd=12 MxCh= 0
> D: Ver= 2.00 Cls=ff(vend.) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
> P: Vendor=413c ProdID=8197 Rev= 1.12
> S: Manufacturer=Broadcom Corp
> S: Product=BCM20702A0
> S: SerialNumber=74E54354F609
> C:* #Ifs= 4 Cfg#= 1 Atr=e0 MxPwr= 0mA
> I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
> E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms
> E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
> E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
> I:* If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
> I: If#= 1 Alt= 1 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms
> I: If#= 1 Alt= 2 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms
> I: If#= 1 Alt= 3 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms
> I: If#= 1 Alt= 4 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms
> I: If#= 1 Alt= 5 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
> E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms
> E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms
> I:* If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=btusb
> E: Ad=84(I) Atr=02(Bulk) MxPS= 32 Ivl=0ms
> E: Ad=04(O) Atr=02(Bulk) MxPS= 32 Ivl=0ms
> I:* If#= 3 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=01 Driver=(none)
> --
>
>
> [1]: https://github.com/winterheart/broadcom-bt-firmware/blob/master/brcm/BCM20702A1-413c-8197.hcd
please create a complete patch and full commit message via git format-patch that we can merge.
Regards
Marcel
