i.MX8M Mini Hangs at ATF when booting from USB

[Tom Rini]

On Wed, Feb 02, 2022 at 12:48:06PM -0600, Adam Ford wrote:
> On Wed, Feb 2, 2022 at 12:42 PM Tom Rini <trini at konsulko.com> wrote:
> >
> > On Wed, Feb 02, 2022 at 02:45:44PM -0300, Fabio Estevam wrote:
> > > Hi Marcel,
> > >
> > > [Adding Tom and Marek]
> > >
> > > On Wed, Feb 2, 2022 at 2:40 PM Marcel Ziswiler
> > > <marcel.ziswiler at toradex.com> wrote:
> > >
> > > > > The blocker to getting non-dm-spl-usb support for IMX8M appears to be
> > > > > the base addresses and instead of adding more of them to imx-regs.h we
> > > > > need to get them from DT via of_platdata which nobody has had time to
> > > > > dig into yet.
> > > >
> > > > I was also a little hesitant due to not using DM in SPL might no longer be accepted upstream. What is the
> > > > stance on this?
> > >
> > > My understanding is that there is no requirement to use DM in SPL.
> >
> > DM isn't required in SPL, no.  Are we running in to some size limit
> > here?  I see SPL_DM being set in a number of imx8m* platforms is why I
> > ask.
> 
> If we try to run SPL_DM_USB we run into serious space issues.  Some of
> us are trying to boot over USB, but the only real way to do it appears
> to be to not use DM_USB in SPL, but that requires adding some more
> manual registers.
> 
> Ideally, we would use of_platdata, but if that's enabled, it requires
> a bunch of drivers to be updated, and until that's done, all kinds of
> stuff break.  I think Fabio tried to push a non-DM-USB method, but
> there was some resistance.

OK.  Yes, I would prefer that ideal situation but given the current
backlog of imx changes, I understand the hesitation to add still more to
the to be merged queue.

-- 
Tom
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