linux-kernel - Re: [PATCH v2] brcmfmac: Add support for BCM43596 PCIe Wi-Fi

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Message-ID: <13b8c67c-399c-d1a6-4929-61aea27aa57d@somainline.org>
Date:   Wed, 21 Sep 2022 23:26:57 +0200
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     Hector Martin <marcan@...can.st>,
        ~postmarketos/upstreaming@...ts.sr.ht
Cc:     martin.botka@...ainline.org,
        angelogioacchino.delregno@...ainline.org,
        marijn.suijten@...ainline.org, jamipkettunen@...ainline.org,
        Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        Marek Vasut <marex@...x.de>,
        "Zhao, Jiaqing" <jiaqing.zhao@...el.com>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        Soontak Lee <soontak.lee@...ress.com>,
        linux-wireless@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        SHA-cyfmac-dev-list@...ineon.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] brcmfmac: Add support for BCM43596 PCIe Wi-Fi



On 21.09.2022 06:37, Hector Martin wrote:
> On 21/09/2022 09.16, Konrad Dybcio wrote:
>> Add support for BCM43596 dual-band AC chip, found in
>> SONY Xperia X Performance, XZ and XZs smartphones (and
>> *possibly* other devices from other manufacturers).
>> The chip doesn't require any special handling and seems to work
>> just fine OOTB.
>>
>> PCIe IDs taken from: https://github.com/sonyxperiadev/kernel/commit/9e43fefbac8e43c3d7792e73ca52a052dd86d7e3.patch
>>
>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
>> ---
>> Changes since v1:
>> - rebased the patch against -next
>>
>>  drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c       | 2 ++
>>  drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c       | 4 ++++
>>  drivers/net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h | 4 ++++
>>  3 files changed, 10 insertions(+)
>>
> [...]
>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
>> index f98641bb1528..2e7fc66adf31 100644
>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
>> @@ -81,6 +81,7 @@ static const struct brcmf_firmware_mapping brcmf_pcie_fwnames[] = {
>>  	BRCMF_FW_ENTRY(BRCM_CC_43570_CHIP_ID, 0xFFFFFFFF, 43570),
>>  	BRCMF_FW_ENTRY(BRCM_CC_4358_CHIP_ID, 0xFFFFFFFF, 4358),
>>  	BRCMF_FW_ENTRY(BRCM_CC_4359_CHIP_ID, 0xFFFFFFFF, 4359),
>> +	BRCMF_FW_ENTRY(BRCM_CC_43596_CHIP_ID, 0xFFFFFFFF, 4359),
> 
> So this works with the same firmware as 4359? That sounds a bit off. Is
> that really the case?
> 
> brcmfmac4359-pcie isn't in linux-firmware, but presumably there is
> *some* semi-canonical firmware you can find for that chip that other
> people are already using. If that works on 43596 *and* you plan on using
> that firmware or some other firmware marked 4359, then this is fine. If
> you are using separate firmware that shipped with a 43596 device and
> isn't itself marked 4359, please make it a separate firmware entry. We
> can always symlink the firmwares if it later turns out there is no
> reason to have different ones for each chip.
The firmware that SONY originally gave us for the devices that we know use
this chip seems to be marked 4359 [1]. That said, I have no other info
about the relation between the two models.

[1] https://github.com/sonyxperiadev/device-sony-kagura/tree/q-mr1/rootdir/vendor/firmware

Konrad
> 
> - Hector