netdev - Re: [PATCH RFC 0/4] Add WCN3988 Bluetooth support for Fairphone 4

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Date:   Sat, 22 Apr 2023 14:03:33 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Luca Weiss <luca.weiss@...rphone.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Balakrishna Godavarthi <bgodavar@...eaurora.org>,
        Rocky Liao <rjliao@...eaurora.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH RFC 0/4] Add WCN3988 Bluetooth support for Fairphone 4



On 21.04.2023 16:11, Luca Weiss wrote:
> Just to start with the important part why this is an RFC:
> 
> While Bluetooth chip init works totally fine and bluez seems to be
> fairly happy with it, there's a (major) problem with scanning, as shown
> with this bluetoothctl snippet and dmesg snippet:
> 
>   [bluetooth]# scan on
>   Failed to start discovery: org.bluez.Error.InProgress
> 
>   [  202.371374] Bluetooth: hci0: Opcode 0x200b failed: -16
> 
> This opcode should be the following:
> 
>   include/net/bluetooth/hci.h:#define HCI_OP_LE_SET_SCAN_PARAM    0x200b
Not a bluetooth expert or anything, but does that thing support
bluetooth LE?

Konrad
> 
> Unfortunately trying various existing code branches in the Bluetooth
> driver doesn't show any sign of making this work and I don't really know
> where to look to debug this further.
> 
> On the other hand "discoverable on" makes the device show up on other
> devices during scanning , so the RF parts of the Bluetooth chip are
> generally functional for sure.
> 
> Any ideas are welcome.
> 
> @Bjorn: Patch "arm64: dts: qcom: sm6350: add uart1 node" should be fine
> to take regardless the RFC status, I don't think the problem is caused
> there.
> 
> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
> ---
> Luca Weiss (4):
>       dt-bindings: net: qualcomm: Add WCN3988
>       Bluetooth: btqca: Add WCN3988 support
>       arm64: dts: qcom: sm6350: add uart1 node
>       arm64: dts: qcom: sm7225-fairphone-fp4: Add Bluetooth
> 
>  .../bindings/net/bluetooth/qualcomm-bluetooth.yaml |  2 +
>  arch/arm64/boot/dts/qcom/sm6350.dtsi               | 63 ++++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts  | 17 ++++++
>  drivers/bluetooth/btqca.c                          | 13 ++++-
>  drivers/bluetooth/btqca.h                          | 12 ++++-
>  drivers/bluetooth/hci_qca.c                        | 12 +++++
>  6 files changed, 115 insertions(+), 4 deletions(-)
> ---
> base-commit: cf4c0112a0350cfe8a63b5eb3377e2366f57545b
> change-id: 20230421-fp4-bluetooth-b36a0e87b9c8
> 
> Best regards,