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From:   Arend Van Spriel <arend.vanspriel@broadcom.com>
To:     Andy Green <andy@warmcat.com>, Shengyu Qu <wiagn233@outlook.com>
CC:     <franky.lin@broadcom.com>, <linux-wireless@vger.kernel.org>
Date:   Thu, 17 Nov 2022 22:52:05 +0100
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In-Reply-To: <638afa8e-a393-410c-3182-0d8e9b6da17d@warmcat.com>
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Subject: Re: AP6275 / bcm43752 pcie on mainline brcmf
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On November 17, 2022 1:01:29 PM Andy Green <andy@warmcat.com> 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.

I see. So could you load bcmdhd and provide log. Preferably with higher 
debug level. It also has a module parameter for it. I think it is called 
dhd_msg_level and please set it to 0x817.

Regards,
Arend


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