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Date:   Sat, 15 Apr 2023 05:01:26 -0700
From:   "Christopher Snowhill" <chris@kode54.net>
To:     "Raul Cheleguini" <raul.cheleguini@gmail.com>
Cc:     linux-bluetooth@vger.kernel.org,
        "Marcel Holtmann" <marcel@holtmann.org>, johan.hedberg@gmail.com,
        luiz.dentz@gmail.com
Subject: Re: unexpected SMP command errors with controller ATS2851
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On Thu, Apr 13, 2023, at 6:54 AM, Raul Cheleguini wrote:
> On Fri, Mar 31, 2023 at 2:50=E2=80=AFAM Christopher Snowhill <chris@ko=
de54.net> wrote:
>>
>> Would some pcapng logs be useful? It appears this device flags some c=
ommands as supported, while indicating their entire feature sets are not=
 supported in the local supported features bitfields. Or that's as near =
as I can guess.
>>
>> First is captured from a generic driver that works, the latter is cap=
tured from Linux 6.2.9. Included in the working capture is the beginning=
 of an exchange with my Sony headphones. The latter stops logging after =
the first failed command.
>>
>> https://f.losno.co/bluetooth_ats2851.pcapng.zst
>> https://f.losno.co/bluetooth_ats2851_broken.pcapng.zst
>
> Hi Christopher,
>
> Thank you for sharing the pcap files. Based on your comments from anot=
her
> thread regarding this adapter, I suggest that you apply the following =
patches:
>
> [PATCH] Bluetooth: Improve support for Actions Semi ATS2851 based devi=
ces
> https://marc.info/?l=3Dlinux-bluetooth&m=3D167846197021176&w=3D2
>
> [PATCH] Bluetooth: Add new quirk for broken set random RPA timeout for=
 ATS...
> https://marc.info/?l=3Dlinux-bluetooth&m=3D167957918920723&w=3D2
>
> [PATCH] Bluetooth: Add new quirk for broken extended create connection=
 for...
> https://marc.info/?l=3Dlinux-bluetooth&m=3D167957998621276&w=3D2
>
> You would end up in the situation mentioned in this thread, and you co=
uld
> resume your tests from there. I haven't had the time to experiment wit=
h SMP yet,
> so any assistance would be greatly appreciated.

The above PCAP files from Linux were logged with those three patches alr=
eady applied. It did not help my situation. And any further feedback on =
this device will not be coming from me, as I already returned it and bou=
ght a supported Realtek device instead.