Re: Pinebook Pro

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Mon, Sep 19, 2022 at 04:22:43PM +0100, Robert Swindells wrote:
> 
> Manuel Bouyer <bouyer%antioche.eu.org@localhost> wrote:
> >On Mon, Sep 19, 2022 at 03:35:07PM +0100, Robert Swindells wrote:
> >> There is one function in the linux compat layer that is still a stub
> >> that needs to be written to allocate space for the MMU page table.
> >> 
> >> It will probably have the same problem as the lima driver when trying to
> >> load shaders from userland, but it provides another platform to use to
> >> debug this.
> >> 
> >> Then it needs to be made to build as a module as the source is GPL.
> >> 
> >> Maybe need to decide what to do about MesaLib in userland, is it worth
> >> committing the Makefile changes to build lima and panfrost before the
> >> branch for NetBSD-10? There are no source changes needed to MesaLib, one
> >> small change to libdrm.
> >
> > How hard would it be to get the kernel parts pulled up to netbsd-10 ?
> 
> I think that would depend on what kind of changes releng@ would allow to
> be in a pullup commit.

Nothing that changes the API. Also, intrusive changes to core subsystems
(like UVM or the VFS) wouldn't be appropriate either. I guess DRM is also
a core subsystem these days.

> 
> One idea is to commit my changes to the core DRM code soon, then just
> add the lima and panfrost code as snapshots in a pullup to netbsd-10,
> the full commit history for them would be in -current.
> 
> The ABI would have been fixed by the earlier core DRM changes.

Looks like it would work

> 
> > I'm interested in Lima supoort :)
> 
> For which SoC?

A20, mainly. I also have an A64 lying around.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
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