linux-kernel - Re: [PATCH v2 2/2] Bluetooth: hci_qca: Enable HFP hardware offload for WCN6855

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Message-ID: <CABBYNZL-J3-kcrN-B_1yXci+nw8zjgiiD_YFH0i4xeRNvY_Jrw@mail.gmail.com>
Date: Tue, 27 Jan 2026 10:47:59 -0500
From: Luiz Augusto von Dentz <luiz.dentz@...il.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Mengshi Wu <mengshi.wu@....qualcomm.com>, Bartosz Golaszewski <brgl@...nel.org>, 
	Marcel Holtmann <marcel@...tmann.org>, linux-arm-msm@...r.kernel.org, 
	linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org, 
	shuai.zhang@....qualcomm.com, cheng.jiang@....qualcomm.com, 
	chezhou@....qualcomm.com, wei.deng@....qualcomm.com, yiboz@....qualcomm.com
Subject: Re: [PATCH v2 2/2] Bluetooth: hci_qca: Enable HFP hardware offload
 for WCN6855

Hi,

On Tue, Jan 27, 2026 at 10:06 AM Dmitry Baryshkov
<dmitry.baryshkov@....qualcomm.com> wrote:
>
> On Tue, Jan 27, 2026 at 10:32:58AM +0800, Mengshi Wu wrote:
> >
> >
> > On 1/27/2026 1:51 AM, Dmitry Baryshkov wrote:
> > > On Tue, Jan 27, 2026 at 12:24:44AM +0800, Mengshi Wu wrote:
> > >> Add QCA_CAP_HFP_HW_OFFLOAD capability flag to WCN6855 device
> > >> data structures to enable Hands-Free Profile (HFP) hardware
> > >> offload support on these Qualcomm Bluetooth chipsets.
> > >>
> > >> Signed-off-by: Mengshi Wu <mengshi.wu@....qualcomm.com>
> > >> ---
> > >>  drivers/bluetooth/hci_qca.c | 3 ++-
> > >>  1 file changed, 2 insertions(+), 1 deletion(-)
> > >>
> > >
> > > Any other chips which would benefit from this flag? If you are setting
> > > it for WCN6855, I'd assume that it also applies to WCN7850. Should it be
> > > set for WCN6750?
> > >
> >
> > Thanks for the reminder. This should also apply to WCN7850. WCN6750 is not
> > considered at this time.
>
> What does it mean? It either supports HFP ofload, or not. Does it?

Or does that mean offload is considered the default over HCI, and in
that case does it actually work with the likes of Linux
distros/Pipewire or it is Android only? The fact that it is mentioning
HFP rather than SCO is already concerning to me, the kernel driver
shouldn't be involved with profile layers other than core.


>
> --
> With best wishes
> Dmitry



-- 
Luiz Augusto von Dentz