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Message-ID: <3163e341-bcfc-a2c3-f0e1-5b62c9da2f43@broadcom.com>
Date:   Tue, 29 Nov 2022 20:48:56 +0100
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Subject: Re: AP6275 / bcm43752 pcie on mainline brcmf
To:     Angus Ainslie <angus@akkea.ca>
Cc:     Andy Green <andy@warmcat.com>, Shengyu Qu <wiagn233@outlook.com>,
        franky.lin@broadcom.com, linux-wireless@vger.kernel.org
References: <TY3P286MB26114DD461F50814980453E598029@TY3P286MB2611.JPNP286.PROD.OUTLOOK.COM>
 <08416710-655a-c87c-a599-3fe2563f7de4@warmcat.com>
 <18470a1e910.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com>
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 <184720fc920.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com>
 <TY3P286MB26118BD94839F752CADCCF5298079@TY3P286MB2611.JPNP286.PROD.OUTLOOK.COM>
 <625f1d5d-e137-7ad7-96b9-92035e87df8b@broadcom.com>
 <638afa8e-a393-410c-3182-0d8e9b6da17d@warmcat.com>
 <7bf5884906b1abc30adebd3c915a3259@akkea.ca>
 <18486ca8490.279b.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com>
 <a25fbe81f6f5615a2cfb7fda80d6db9b@akkea.ca>
From:   Arend van Spriel <arend.vanspriel@broadcom.com>
In-Reply-To: <a25fbe81f6f5615a2cfb7fda80d6db9b@akkea.ca>
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On 11/17/2022 7:36 PM, Angus Ainslie wrote:
> On 2022-11-17 10:12, Arend Van Spriel wrote:
>> On November 17, 2022 5:06:25 PM Angus Ainslie <angus@akkea.ca> wrote:
>>
>>> On 2022-11-17 04:01, Andy Green wrote:
>>>> On 11/17/22 09:23, Arend van Spriel wrote:
>>>>> On 11/16/2022 1:25 PM, Shengyu Qu wrote:
>>>>>> Got a new version of downstream driver and firmware here:
>>>>>> https://gitlab.com/rk3588_linux/linux/external/rkwifibt/-/tree/linux-5.10-gen-rkr3.4
>>>>>
>>>>> Thanks for that. The firmware indeed seems to originate from Synaptics
>>>>> and this module can be found on wifi-alliance product finder:
>>>>>
>>>>> https://www.wi-fi.org/product-finder-results?sort_by=certified&sort_order=desc&keywords=ap6275
>>>>>
>>>>> We have no known contacts there and they do not seem to have much
>>>>> interest in open-source. In that gitlab repo I see they are providing
>>>>> bcmdhd driver and I assume they consider that sufficient.
>>>>>
>>>>> Will see what I can do. First have to think on how to approach this
>>>>> failure to get most out of a debug effort. I do not have the module
>>>>> over here so we would need to go back and forth. The fact that the
>>>>> issue is seen on both SDIO and PCIe is somewhat encouraging.
>>>>
>>>> Yes it seems that at some point with some firmware, SDIO has worked
>>>> for, eg, Angus.  And, it should work well with bchdhd (but that does
>>>> not seem to work for scan for me on v6.1-rc5 uplevel with the firmware
>>>> load changed to use kernel apis; but the firmware has no timeout on
>>>> bcmdhd). So it doesn't feel a million miles away.
>>>
>>> This is the firmware we have been using for SDIO. It was sent to us
>>> directly by SparkLAN so not sure how it compares to other variants.
>>>
>>> https://source.puri.sm/Librem5/firmware-brcm43752-nonfree/-/tree/master/firmware/brcm
>>
>> It is a tad bit older:
>>
>> $ strings brcmfmac43752-sdio.bin | grep FW-TAG
>> <FW-TAG>4362a2-roml/config_sdio_ampak_release_he
>> Version=18.35.387.23.7 (b328500@shgit) (wlan=r880297)
>> Date=2020-07-13T10:34:00Z FWID=01-f50fdff0
>>
> 
> Currently it's broken for hotspot mode but I haven't had the chance to 
> see if that is FW or something further up the stack.

Hi Angus,

When you added support for this device in brcmfmac you marked it as a 
Cypress device. Are you sure about that? AFAICT this device is coming 
from Synaptics.

Regards,
Arend

> Angus
> 
>> Thanks,
>> Arend
>>
>>>
>>> Angus
>>>
>>>> I have the hw, and (paid) time to help with debugging this "pair of
>>>> hands" style. I'm also a little familiar with the kernel code and can
>>>> try jiggle things autonomously if you can prompt what is interesting.
>>>>
>>>> -Andy
>>>>
>>>>> Regards,
>>>>> Arend

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