From:   Arend Van Spriel <arend.vanspriel@broadcom.com>
To:     Michael Stapelberg <michael+lkml@stapelberg.ch>
CC:     Kalle Valo <kvalo@kernel.org>,
        Franky Lin <franky.lin@broadcom.com>,
        "Pieter-Paul Giesberts" <pieter-paul.giesberts@broadcom.com>,
        Hante Meuleman <hante.meuleman@broadcom.com>,
        <linux-wireless@vger.kernel.org>
Date:   Wed, 15 Mar 2023 09:33:36 +0100
Message-ID: <186e4673718.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com>
In-Reply-To: <CANnVG6n-eqKUQnX_6wncmjG1kyVfhxqs2L82xYQpDmGq89eVAQ@mail.gmail.com>
References: <CANnVG6=a3etRagG+RaSEH-b4_nfzxpEKffQtuMWrttrbgjunZQ@mail.gmail.com>
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Subject: Re: wifi breakage due to commit "wifi: brcmfmac: add support for vendor-specific firmware api"
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On March 15, 2023 8:58:43 AM Michael Stapelberg 
<michael+lkml@stapelberg.ch> wrote:

> Hey Arend
>
> Thanks for taking a look.
>
> The brcmfmac-wcc module is present on my installation, but I’m not
> currently loading it.
> (I only load brcmutil, then brcmfmac.)
>
> But, even if I load it, the wlan0 interface still doesn’t show up.
>
> In the modules.dep, I see that brcmfmac-wcc should be loaded after
> brcmutil and brcmfmac.
> Is that accurate?

Yes. Actually brcmfmac loads brcmfmac-wcc by itself.

> My installation is somewhat unusual in that I use a custom userland
> (see https://gokrazy.org/).

Bit tricky choice of name :-p I will check it out.

Regards,
Arend

>
> Thanks
> Best regards
> Michael
>
>
> On Wed, 15 Mar 2023 at 00:21, Arend Van Spriel
> <arend.vanspriel@broadcom.com> wrote:
>>
>> On March 14, 2023 11:49:05 PM Michael Stapelberg
>> <michael+lkml@stapelberg.ch> wrote:
>>
>>> Of course, find it attached. Thanks.
>>
>> Strange. Could it be there is some build config needed to install the
>> additional kernel modules (brcmfmac-wcc.ko, etc.) on RPi image?
>>
>> Regards,
>> Arend
>>
>>>
>>> On Tue, 14 Mar 2023 at 23:26, Arend Van Spriel
>>> <arend.vanspriel@broadcom.com> wrote:
>>>>
>>>> On March 14, 2023 8:39:05 PM Michael Stapelberg
>>>> <michael+lkml@stapelberg.ch> wrote:
>>>>
>>>>> Hey Arend
>>>>>
>>>>> I recently bisected a user-reported WiFi breakage on the Raspberry Pi
>>>>> 3B+ to your commit
>>>>> https://github.com/torvalds/linux/commit/d6a5c562214f26e442c8ec3ff1e28e16675d1bcf
>>>>> https://lore.kernel.org/r/20221129135446.151065-4-arend.vanspriel@broadcom.com
>>>>>
>>>>> On our end, the issue was reported here:
>>>>> https://github.com/gokrazy/wifi/issues/3
>>>>>
>>>>> As of Linux 6.2.6, this seems to still be unfixed, so I wanted to
>>>>> check in and see if you could take a look please?
>>>>
>>>> I have a suspicion, but can you provide the kernel .config file so I can
>>>> see if I am on the right track.
>>>>
>>>>> + brcmfmac: brcmf_fwvid_request_module: mod=wcc: failed -2
>>>>> + ieee80211 phy0: brcmf_attach: brcmf_fwvid_attach failed
>>>>> + brcmfmac: brcmf_sdio_firmware_callback: brcmf_attach failed
>>>>
>>>> Regards,
>>>> Arend


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