linux-kernel - Re: On brcm80211 maintenance and support

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Date:   Thu, 12 Oct 2023 09:25:45 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Arend van Spriel <arend.vanspriel@...adcom.com>,
        Hector Martin <marcan@...can.st>,
        Kalle Valo <kvalo@...nel.org>, Neal Gompa <neal@...pa.dev>
Cc:     Dmitry Antipov <dmantipov@...dex.ru>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "lvc-project@...uxtesting.org" <lvc-project@...uxtesting.org>,
        Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        SHA-cyfmac-dev-list@...ineon.com,
        brcm80211-dev-list.pdl@...adcom.com,
        Asahi Linux <asahi@...ts.linux.dev>,
        LKML <linux-kernel@...r.kernel.org>,
        Julian Calaby <julian.calaby@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Phil Elwell <phil@...pberrypi.org>
Subject: Re: On brcm80211 maintenance and support

On 10/12/23 01:41, Arend van Spriel wrote:
[snip]
>> I have a patch to enable WPA3 in Broadcom chipsets (yes, the driver is
>> in such a sorry state it doesn't even support that yet). The current
>> support attempt was added by a Cypress engineer and uses a completely
>> different firmware mechanism. Is that supposed to actually work? Does it
>> work currently? Is that the case for all Cypress firmwares? Or only
>> some? Does the alternate mechanism we have for Broadcom chips work too?
>> Only Cypress can answer those questions ahead of time, and they aren't
>> (they ignored me last time I brought this up). So my current patch just
>> replaces the mechanism with the known-working one for Broadcom chips.
> 
> This is mainly why I introduced the vendor-split concept so we can keep 
> the Cypress mechanism and allow a different mechanism for Broadcom 
> chips. The Cypress mechanism did not work for the Broadcom chips I have 
> so I wanted to test it on the Cypress chips I got shipped long ago and 
> they simply do not come up. Have not tried with RPi as it is not running 
> vanilla kernel. Could try with a backports driver.

You can run mainline on all of the Raspberry Pi devices, as far as Wi-Fi 
is concerned I cannot think of any major roadblocks, if not, email me 
privately and we can figure this one out.
-- 
Florian