[PATCH 1/2] board: ti: am62x: am62x.env: Fix boot_targets

[Manorit Chawdhry]

Hi Simon,

On 11:22-20231005, Simon Glass wrote:
> Hi Nishanth,
> 
> On Thu, 5 Oct 2023 at 11:16, Nishanth Menon <nm at ti.com> wrote:
> >
> > On 12:10-20231005, Nishanth Menon wrote:
> > > On 12:36-20231005, Tom Rini wrote:
> > > > On Thu, Oct 05, 2023 at 09:19:48AM -0500, Andrew Davis wrote:
> > > > > On 10/4/23 8:54 AM, Nishanth Menon wrote:
> > > > > > On 08:48-20231004, Andrew Davis wrote:
> > > > > > > On 10/4/23 8:23 AM, Roger Quadros wrote:
> > > > > > > > ti_mmc is not a valid boot_target for standard boot flow so
> > > > > > >
> > > > > > > Is there some way to make it into a valid boot_target? Otherwise
> > > > > > > how do we use uEnv.txt files, or boot from FIT images with overlays?
> > > > > >
> > > > > > envboot takes care of uEnv.txt file (see
> > > > > > https://lore.kernel.org/all/20231004132324.44198-3-rogerq@kernel.org/)
> > > > > >
> > > > > > Early remote proc loading and FIT image is a question for stdboot itself.
> > > > > >
> > > > >
> > > > > If stdboot is missing these features then we shouldn't switch until it
> > > > > has them. I'm all for switching to this, but only if it is complete.
> > > >
> > > > Depends on what you mean?  Did you mean an option to run scripts
> > > > (exists) or an option to do what TI needs done, via
> > > > boot/bootmeth_something.c ?  If the latter, someone from TI needs to
> > > > figure out what that should be and do (but plumbing-wise everything it
> > > > needs should exist).
> > >
> > > Andrew is generalizing here (on the wrong patch though).
> > >
> > > On am62x platforms, there is nothing regressing with this series. The
> > > challenge is early remote_proc loading which is done for J7* platforms.
> > >
> > > How that is initiated as part of bootmethods is something of a gap.
> > >
> > > The other gap has been support for uEnv.txt -> which we can workaround
> > > at the moment by using CONFIG_BOOTCOMMAND="run envboot; bootflow scan
> > > -lb" in defconfig (This series from Roger already does that - hence I am
> > > saying that Andrew is complaining on the wrong series).
> > >
> > > Ideally, we should just have CONFIG_BOOTCOMMAND="bootflow scan -lb" and
> > > uEnv.txt remoteproc loads and the various standard bootmethods should
> > > "just work".
> >
> >
> > I forgot to add: FIT image authenticated boot flow. That is really what
> > ti_mmc distroboot method was trying to solve.
> >
> > Maybe Simon or someone know how the stdboot flow handles authenticated
> > kernel image and dtb boot flow with FIT image?
> 
> Yes you can use FIT configuration verification and things should work as normal.
> 

Could you give any reference documentation for this?

Regards,
Manorit

> Regards,
> Simon