onboard wireless on rpi4

[tech-lists]

On Sat, Sep 05, 2020 at 07:11:53PM +0100, tech-lists wrote:
>On Sat, Sep 05, 2020 at 12:15:06PM +0000, Bjoern A. Zeeb wrote:
>>
>>Two things which may help for the RPi/SDIO parts are:
>>
>>- please try and use MMCCAM kernels and help, test, debug, report, ..
>>all the things you find so (other people) can jump in as well so we can
>>switch that on as default.  Without that, no SDIO.
>
>Sure, it'll be the next thing i build on rpi4 after it's finished portmaster.
>Will you need a dmesg posted somewhere?
>
>Have to admit i've never built MMCCAM kernel before for rpi 1,2b+ or 3b+.
>What's significant about it?

GENERIC-MMCCAM built and installed without error but breaks to ddb when the
kernel tries to load [1] I can see it by attaching a screen to HDMI. I have an 
FTDI usb serial device converter (built into the serial cable) is there any way 
i can grab output from there? or is the output written somewhere on the card 
where I can look at it?

[1] in other words it passes the u-boot phase, gets past where it detects cpu,
then loads of errors zoom off the screen nd then ddb> prompt
-- 
J.
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