[PATCH 0/4] bloblist: fdt: Clean up the code

[Tom Rini]

On Sat, Apr 05, 2025 at 06:40:08AM +1300, Simon Glass wrote:
> Hi Raymond,
> 
> On Sat, 5 Apr 2025 at 03:49, Raymond Mao <raymond.mao at linaro.org> wrote:
> >
> > Hi Tom and Simon,
> >
> > On Fri, 28 Mar 2025 at 21:00, Raymond Mao <raymond.mao at linaro.org> wrote:
> > >
> > > Hi Tom and Simon,
> > >
> > > On Fri, 28 Mar 2025 at 20:02, Tom Rini <trini at konsulko.com> wrote:
> > > >
> > > > On Fri, Mar 28, 2025 at 11:38:14PM +0000, Simon Glass wrote:
> > > > > Hi Tom,
> > > > >
> > > > > On Fri, 28 Mar 2025 at 10:18, Tom Rini <trini at konsulko.com> wrote:
> > > > > >
> > > > > > On Fri, Mar 28, 2025 at 09:43:54AM -0600, Simon Glass wrote:
> > > > > >
> > > > > > > The bloblist code took what I consider to be a wrong turn a year or so
> > > > > > > ago. As discussed with Tom, this series proposes a way to arrange things
> > > > > > > so that it is simpler to understand and manage.
> > > > > > >
> > > > > > > - Unwind some of the nesting in bloblist_init()
> > > > > > > - Avoid needing to init the bloblist just to get the FDT
> > > > > > > - Create a deterministic OF_BLOBLIST option rather than using guesswork
> > > > > > >
> > > > > > > It is to be hoped that we can get a platform which uses OF_BLOBLIST into
> > > > > > > CI at some point. In the meantime, the standard passage series[1] could
> > > > > > > be resurrected to give some coverage.
> > > > > > >
> > > > > > > [1] https://patchwork.ozlabs.org/project/uboot/list/?series=281465&state=*
> > > > > >
> > > > > > Based on how it's documented to be run in
> > > > > > doc/board/armltd/vexpress64.rst in the next branch, have you confirmed
> > > > > > that platforms using the handoff spec still work?
> > > > >
> > > > > I believe so, yes. I don't have that board to test it though. Raymond
> > > > > may be able to test this series on QEMU?
> > > >
> > > > I was pointing you at the docs so that you would have access to testing
> > > > it. That's part of the docs, running the emulator.
> > > >
> > >
> > > I can help to test the firmware handoff on qemu.
> > > I have all the necessary changes and unit tests for the OP-TEE repo
> > > qemu v8 build to test this.
> > > I will try to find some time early next week to review and test this
> > > series before turning back to you.
> > >
> >
> > Just a follow-up on the testing with TF-A and OP-TEE.
> > Unfortunately, the patch series breaks the transfer list handoff to
> > U-Boot completely and just end up with below error when U-Boot boots:
> > ```
> > No valid device tree binary found at 0000000000000000
> > initcall failed at call 0000000060097bcc (err=-2)
> > ### ERROR ### Please RESET the board ###
> > ```
> >
> > U-Boot test version:
> > 'next' branch + this series + my patch [1] to point fdt_addr to gd->fdt_blob.
> >
> > [1]: https://lore.kernel.org/u-boot/20250331224011.2734284-2-raymond.mao@linaro.org/
> 
> I suppose the FDT address in the register is not being read correctly.
> 
> Do you have a test case for this, e.g. in QEMU? Even if it is just
> binary blobs for now, not suitable for CI, I'd like to get it in my
> lab.
> 
> I did create a test back when I did standard passage, but that series
> seems to have not been applied. I'll see if I can resurrect it.

This problem should also be visible with running vexpress64 as
documented in doc/board/armltd/vexpress64.rst which is not yet in CI
(it's straight forward but non-trivial), which is why I was asking about
it earlier in the thread.

-- 
Tom
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