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Date:   Sun, 13 Nov 2022 23:52:34 +0800
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To:     Arend Van Spriel <arend.vanspriel@broadcom.com>,
        Andy Green <andy@warmcat.com>
Cc:     franky.lin@broadcom.com, linux-wireless@vger.kernel.org
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From:   Shengyu Qu <wiagn233@outlook.com>
Subject: Re: AP6275 / bcm43752 pcie on mainline brcmf
In-Reply-To: <18470a1e910.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com>
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在 2022/11/13 18:56, Arend Van Spriel 写道:
> On November 13, 2022 10:03:11 AM Andy Green <andy@warmcat.com> wrote:
>
>> On 11/13/22 08:26, Shengyu Qu wrote:
>>
>>> Hello, I'm facing the same problem on sdio version of AP6275 module 
>>> in mainline kernel. But I found a very old version from here could 
>>> work with mainline brcmfmac driver.
>>> Link: https://bbs.t-firefly.com/forum.php?mod=viewthread&tid=3107
>>
>> Thanks for the info.
>>
>> The firmware on the firefly thread doesn't seem to have a CLM blob that
>> the mainline driver wants, just two types of the ~900KB main firmware
>> for AP mode support or not.
>
> A separate CLM blob may not be necessary when it is built-in in 
> firmware which can be overloaded by separate blob, but in that case it 
> is optional.
>
>> It also doesn't have _sdio or _pcie in the filenames... I tried it but
>> although it's different in what it read after downloading NVRAM
>>
>> [    3.775602] brcmfmac: brcmf_pcie_download_fw_nvram: sharedram_addr
>> 0xfa2c05d3
>>
>> (the rockchip SDK firmware says 0xfa1a05e5)
>>
>> it still times it out a few seconds later as unresponsive after the fw
>> load... maybe it is for SDIO only, or the lack of CLM, present in the
>> Rockchip fw, means it won't get anywhere.
>
> That sharedram_addr looks wrong. Probably the firmware is not booting 
> for some reason. Can you provide a URL where I can download the 
> rockchip firmware? My internet search skills are lacking.
>
That error report happens when using sdio version firmware for pcie 
card. If you want a new version of rockchip firmware, check this: 
https://gitlab.com/rk3588_linux/linux/external/rkwifibt/-/tree/linux-5.10/firmware/broadcom

Currently seems only firmware from firefly bbs above works with SDIO 
version and mainline now. And no known version PCIE firmware can work 
with mainline driver.

>>
>>> Besides who I should ask to make proper firmware for it into 
>>> linux-firmware repo?
>>
>> It would also be great to hear if the PCIe firmware from Rockchip aimed
>> at the OOT driver was definitively incompatible with the mainline driver
>> and we have to find a solution for that from Broadcom, or it is expected
>> to basically work.  I realize it might not be easy to get an answer
>> internally but this chipset is likely to appear in more RK3588 SBCs soon
>> since it's the one on the evb.
>
> Right now I don't have enough information to comment on this.
Besides, could you upload the firmware that works with mainline driver 
to linux-firmware repo?
>
> Regards,
> Arend
>
>