Re: [PATCH v2] Bluetooth: Add Broadcom channel priority commands

[Sasha Finkelstein]

On Tue, 14 Apr 2026 at 16:00, Luiz Augusto von Dentz
<luiz.dentz@xxxxxxxxx> wrote:
> > +       if (sock)
> > +               set_bit(SOCK_CUSTOM_SOCKOPT, &sock->flags);
>
> This is more complicated than it needs to be. I'd just add a new
> callback, `hdev->set_priority(handle, skb->priority)`, so the driver
> is called whenever it needs to elevate a connection's priority, that
> said there could be cases where a connection needs its priority set
> momentarily to transmit A2DP, followed by OBEX packets that are best
> effort. Therefore, `hci_conn` will probably need to track the priority
> so it can detect when it needs changing on a per skb basis.

I have tested per-skb priorities, and unfortunately, this does not work.
If something tries to send a low-priority packet (for example - a volume
adjustment), a priority drop causes the same kind of dropout that is
caused by scans. It appears that the only way to make this hardware work
is to set the entire hci connection as high priority for as long as it
is being used to transmit audio.