Re: [1/2 very MD part] Support Raspberry Pi [0-3] in big-endian mode

[Nick Hudson <nick.hudson%gmx.co.uk@localhost>]

On 15/11/2020 12:44, Rin Okuyama wrote:
> Hi,
>
> I've managed Raspberry Pi [0-3] to work in big-endian mode:
>
> - Zero and 1 in earmv6{,hf}eb
> - 2 and 3 in earmv7{,hf}eb
> - 3 in aarch64eb
>
> Now, everything except vchiq(4) work without problems.
>
> (1) Data written/read to/from mailbox and dmac should be encoded in
>      little-endian.
>
> http://www.netbsd.org/~rin/rpi_eb_md_20201115.patch

LGTM apart from I don't understand why
bcm2835_aux_platform_early_putchar appears

Also, I'd prefer the whitespace / stylistic changes committed separately
where possible.

> (2) DMA buffer for vchiq(4) should also be encoded in little-endian.
>      However, this require heavy modification to 3rd party sources.
>      At the moment, I disabled vchiq(4) for armeb/aarch64eb.
>
> http://www.netbsd.org/~rin/rpi_eb_vchiq_20201115.patch

vchiq should probably die in favour of VC4 DRM etc. Not sure what
happens wrt audio though.

Nick