Re: Can't boot NetBSD from eMMC storage on rock64?

[Staffan Thomén <duck%shangtai.net@localhost>]

On 16.10 01:33, matthew green wrote:
> Matthias Geiger writes:
> > Hi,
> >
> > I have a spare rock64 I want to run NetBSD on. I downloaded https://
> > nycdn.netbsd.org/pub/arm/NetBSD-11.0-release/NetBSD-11-aarch64--
> > rock64.img.gz from armbsd.org, extracted the image, and flashed it
> > to the eMMC storage from PINE64 with dd. However, I don't get any
> > output at all on the HDMI port.
> >
> > Did I miss something here? Is HDMI not supported yet on this board?
> >
> > Unfortunately I don't have a Serial-to-USB cable at hand to debug
> > this in-depth; would appreciate any pointers.
>
> i have never tried hdmi here, and it doesn't work indeed.  i get nothing
> in both u-boot or netbsd.  i suspect there is both work to do in
> both.  netbsd says:
>
> [     1.000004] rkdrm0 at simplebus0 [     1.000004] rkdrm0: error:
> no display interface ports configured [     1.000004] rkdrm0: error:
> couldn't register DRM device: -6
>
> for me.  i'll try figure out something, but we'll see..

I have idly been digging through this for my mnt reform2, and it appears
that the rkdrm driver is looking for a 'ports' property in the device
tree under the matching device... for the reform there isn't one and I
get this exact error message.

My latest idea is that I could make an dts overlay that adds a link to
the appropriate ports(???)

A tiny clue perhaps. Unverified. I'm mostly clueless about this whole
arm fdt dealio.

Staffan