linux-kernel - Re: [PATCH v3 2/5] Bluetooth: add quirk for broken address properties

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Date: Tue, 19 Mar 2024 17:02:41 +0000
From: Luiz Augusto von Dentz <luiz.dentz@...il.com>
To: Johan Hovold <johan@...nel.org>
Cc: Doug Anderson <dianders@...omium.org>, Johan Hovold <johan+linaro@...nel.org>, 
	Marcel Holtmann <marcel@...tmann.org>, Bjorn Andersson <andersson@...nel.org>, 
	Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	cros-qcom-dts-watchers@...omium.org, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	Johan Hedberg <johan.hedberg@...il.com>, 
	Balakrishna Godavarthi <quic_bgodavar@...cinc.com>, Matthias Kaehlcke <mka@...omium.org>, 
	Rocky Liao <quic_rjliao@...cinc.com>, Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
	linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH v3 2/5] Bluetooth: add quirk for broken address properties

 Hi,

On Tue, Mar 19, 2024 at 4:26 PM Johan Hovold <johan@...nel.org> wrote:
>
> On Tue, Mar 19, 2024 at 09:10:23AM -0700, Doug Anderson wrote:
> > On Tue, Mar 19, 2024 at 8:29 AM Johan Hovold <johan+linaro@...nel.org> wrote:
>
> > > +       /* When this quirk is set, the Bluetooth Device Address provided by
> > > +        * the 'local-bd-address' fwnode property is incorrectly specified in
> > > +        * big-endian order.
> > > +        *
> > > +        * This quirk can be set before hci_register_dev is called or
> > > +        * during the hdev->setup vendor callback.
> > > +        */
> > > +       HCI_QUIRK_BDADDR_PROPERTY_BROKEN,
> >
> > Like with the binding, I feel like
> > "HCI_QUIRK_BDADDR_PROPERTY_BACKWARDS" or
> > "HCI_QUIRK_BDADDR_PROPERTY_SWAPPED" would be more documenting but I
> > don't feel strongly.
>
> So, same reasoning here, this it not some quirk that people should go
> around setting without first considering to fix their boot firmware.

Or we just change its meaning to say what byteorder is the BDADDR e.g:
HCI_QUIRK_BDADDR_PROPERTY_BYTEORDER=be

> Johan



-- 
Luiz Augusto von Dentz