Re: [PATCH v3] Bluetooth: btusb: Add support for LG LGSBWAC92/TWCM-K505D

From: Marcel Holtmann <marcel@holtmann.org>
To: Forest Crossman <cyrozap@gmail.com>
Cc: Johan Hedberg <johan.hedberg@gmail.com>,
	Luiz Augusto von Dentz <luiz.dentz@gmail.com>,
	matthias.bgg@gmail.com, linux-bluetooth@vger.kernel.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] Bluetooth: btusb: Add support for LG LGSBWAC92/TWCM-K505D
Date: Thu, 22 Jul 2021 16:18:44 +0200	[thread overview]
Message-ID: <305B9EC6-6F68-4AF7-8DC5-A1E68EE6C439@holtmann.org> (raw)
In-Reply-To: <20210712073220.200414-1-cyrozap@gmail.com>

Hi Forest,

> The LG LGSBWAC92/TWCM-K505D/EAT64454801/EAT64454802 (it goes by many
> names) is a combo WiFi/Bluetooth module that's used in several models of
> LG TVs. It uses the MediaTek MT7668AUN, which is already supported in
> btusb, but this device has a non-MediaTek VID:PID pair so to get it to
> work we just need to add it to the list of devices to probe.
> 
> Device from /sys/kernel/debug/usb/devices:
> 
> T:  Bus=09 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#=  6 Spd=480  MxCh= 0
> D:  Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
> P:  Vendor=043e ProdID=3109 Rev= 1.00
> S:  Manufacturer=MediaTek Inc.
> S:  Product=Wireless_Device
> S:  SerialNumber=000000000
> C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr=100mA
> A:  FirstIf#= 0 IfCount= 2 Cls=e0(wlcon) Sub=01 Prot=01
> I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
> E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=125us
> E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) 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=e0(wlcon) 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=e0(wlcon) 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=e0(wlcon) 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=e0(wlcon) 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=e0(wlcon) 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#= 1 Alt= 6 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
> E:  Ad=83(I) Atr=01(Isoc) MxPS=  63 Ivl=1ms
> E:  Ad=03(O) Atr=01(Isoc) MxPS=  63 Ivl=1ms
> I:* If#= 2 Alt= 0 #EPs= 8 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
> E:  Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=08(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=06(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=07(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=09(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> 
> Signed-off-by: Forest Crossman <cyrozap@gmail.com>
> ---
> 
> Changes from v2:
> - Specify device with USB_DEVICE again, to match the other "Additional
>   MediaTek Bluetooth devices".
> - Add BTUSB_WIDEBAND_SPEECH and BTUSB_VALID_LE_STATES flags to the
>   driver_info, since this device would otherwise have them applied were
>   it not for the non-MediaTek vendor ID.
> 
> Changes from v1:
> - Added /sys/kernel/debug/usb/devices info.
> - Specify device with USB_DEVICE_AND_INTERFACE_INFO instead of just
>   USB_DEVICE.
> 
> ---
> drivers/bluetooth/btusb.c | 5 +++++
> 1 file changed, 5 insertions(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel

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