[PATCH 0/2] arm64: zynqmp: Cleanup defconfigs

[Tom Rini <trini@konsulko.com>]

On Tue, Dec 10, 2019 at 04:24:09PM +0100, Michal Simek wrote:
> On 10. 12. 19 14:56, Tom Rini wrote:
> > On Tue, Dec 10, 2019 at 01:40:42PM +0100, Michal Simek wrote:
> >> Hi Tom,
> >>
> >> On 09. 12. 19 16:19, Michal Simek wrote:
> >>> Hi,
> >>>
> >>> over years a lot of new Xilinx ZynqMP board have been added to U-Boot with
> >>> corresponding defconfigs. Also a lot of drivers have been moved to DM that
> >>> we can make one generic configuration with one defconfig.
> >>> Nand still needs to be validated that's why dc2/dc3 are not moved yet.
> >>>
> >>> Boards can be build like this:
> >>> export DEVICE_TREE="avnet-ultra96-rev1"
> >>> make xilinx_zynqmp_virt_defconfig
> >>> make -j
> >>>
> >>> Series depends on patches sent before that's why here is full tree:
> >>> https://github.com/michalsimek/u-boot/tree/20191209-mainline
> >>
> >> This series will require some changes in CI loops because right now
> >> I didn't setup default device tree (CONFIG_DEFAULT_DEVICE_TREE) to
> >> "force" everybody to properly pass DEVICE_TREE via command line.
> >> I can't use OF_BOARD because then SPL is built without DT at all.
> >>
> >> How do you think I should handle it for CI loops?
> >> 1. I can remove this configuration but it will be only one at the end
> >> that's why not a good solution.
> >> 2. Add generic option to run some commands before tests like export
> >> DEVICE_TREE above
> >> 3. provide different options for SPL/full u-boot how
> >> OF_SEPARATE/OF_BOARD is handled.
> > 
> > So, for CI are you wanting to test most device trees, or just one?
> 
> All zynqmp dtses are built by default.

Right, but for what I thought you're saying the real use is, you pass
just a single device tree, right?  If so, do you think we should loop
over each, or just build one?

> >  Are
> > we able to run one of these device trees via QEMU? 
> 
> zynqmp is covered just by buildman not by pytest. I have this on my todo
> list for some time but there will be other issues with mainline qemu to
> do so.

OK, so something to improve for the future, and after we handle this
"today" problem.

> > If we can run the
> > virt defconfig via qemu, we should just update/extend that stanza in the
> > CI files to set DEVICE_TREE and exclude building it from the normal
> > jobs.
> 
> Based on next generation Xilinx Versal where we use OF_BOARD qemu is
> generated DT for model self to ensure that only stuff which are emulated
> are provided to SW. Logic for dt selection is quite simply.
> https://github.com/Xilinx/u-boot-xlnx/blob/master/arch/arm/mach-versal/cpu.c#L112
> But Versal is not using SPL and SPL needs initial DT. Also standard
> Xilinx boot flow on zynq/zynqmp is not using SPL and SPL is community
> driven effort.
> 
> At the end of the day I would like to use the same functionality across
> boards. It means full u-boot should check one fixed location for DT
> first with priority. For this OF_SEPARATE can be also used because
> board_fdt_blob_setup can be overwritten for these cases too.
> https://gitlab.denx.de/u-boot/u-boot/blob/master/lib/fdtdec.c#L1190
> 
> >  If we can't run via qemu then yes, something like option #2 and
> > we set DEVICE_TREE in one job and export it if set in the build job.
> 
> It means for qemu there is no real need to build dts from source tree at
> all.
> Let me look at #2 for CI.

OK, thanks!

-- 
Tom
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