[U-Boot] [PATCH V5 00/31] imx: add i.MX8M support and i.MX8MQ EVK

[Jon Nettleton]

On Thu, Sep 6, 2018 at 3:37 PM Fabio Estevam <festevam at gmail.com> wrote:
>
> Hi Peng,
>
> On Fri, Aug 31, 2018 at 3:27 AM, Jon Nettleton <jon at solid-run.com> wrote:
>
> > Peng,
> >
> > Will you be releasing the script you are using to convert that code
> > generated by the ddr training tool into this format?  I would like to
> > test your patchset on our new SOMs and that would be very useful.
>
> Any comments about the DDR init script? Looks like we are stuck in
> this issue for a long time.
>

I have been chewing on this over the past week, and I am starting to
think that u-boot is not necessarily the right place for the DDR
initialization for this platform.  We require ATF in order to load the
lpddr4 firmware regardless, so why not do the DDR training and
configuration there?  This would also abstract out the proprietary
memory bits so the code doesn't need to be re-duplicated in the
various bootloaders.  In theory it should also simplify the MX8 image
scripts since SPL would not be a requirement.

Thoughts?