<Tartarus>
apritzel: Sigh, I need to see what I need to kick to get readthedocs to email me on failures
<apritzel>
no worries, it's not super urgent, I just wanted to know if it actually tracks master, or if I have to wait till April ;-)
<Tartarus>
Well, it had been doing a few things until it broke :)
<Tartarus>
... I think using a test tag and then deleting it might be dangerous as an idea, so I'll not do that. But I put a fix inn my current CI-related series now
<Tartarus>
I'll post that this evening
<Tartarus>
and then we'll get docs for master at least soon, I hope
<Tartarus>
Or, a new error to debug
<apritzel>
Tartarus: many thanks!
<Tartarus>
And I'll go see what I need to do to test a specific branch
<Tartarus>
probably just missing something obvious
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<Tartarus>
OK, yeah, it's pretty annoying to test doc builds the way I usually work, BUT I did finally see you have to spell out where to email on build failures as it's not automatic to the project owner
<Tartarus>
So at least next time this breaks I'll see right away and not have it back-burned for months
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<xypron>
apritzl: each push to the project git should trigger readthedocs
<xypron>
Tartarus: readthedocs has this failure: sphinx.errors.VersionRequirementError: This project needs at least Sphinx v2.4.4 and therefore cannot be built with this version.
<djsands>
I am looking into the DRAM initialization of the RK3399 to support a custom board with LPDDR4. I think I am having issues with using a 16-bit bus width (normally looks like a 32-bit width would be used). The DDR controller registers do not seem to be well documented (just a big dump, maybe from a tool). There are a few breadcrumbs in the code, and
<djsands>
maybe I can cross reference some items to a TI part that uses the same or similar controller, but is it likely I would be able to find any complete documentation on these registers anywhere?
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<Tartarus>
xypron: ok, thanks. Go ahead and send it in your next doc PR :)
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<Net147_>
How would I test if the output of "adc single" command is equal to a certain value?
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<Net147>
is there a way to capture the output of command in variable?
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<mps>
xypron: I tested u-boot sandbox on bare metal x86_64 (alpine edge) with your patch and it works fine
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<xypron>
mps: I wonder why got the wchar_t problem in Docker and you don't
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<mps>
xypron: have no idea, and I build it in lxc and didn't had this issue
<mps>
xypron: do you know alpine release version in docker? I build and test on edge (development release something like rolling ones)
<xypron>
mps: I will try to setup a complete Docketfile for you
<mps>
xypron: if you want ok, but I'm not sure is that worth your time, expect if you want that
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<Tartarus>
xypron: Do you recall what function it is that looks for the ESP partition, in order to then know where to write variables to, at least in the non-secure case?
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<Tartarus>
xypron: nm, apalos pointed me in the right direction
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<xypron>
Tartarus: Look at the end of efi_status_t efi_disk_add_dev()
<xypron>
If you have an ESP you should not mark other partitions as bootable.
<Tartarus>
xypron: The problem is that we have systems that we cannot mark ESP on
<Tartarus>
Otherwise the ROM doesn't see it as bootable
<xypron>
Tartarus: then mark one partition as bootable
<xypron>
Tartarus: Should be the one where your EFI/boot/ directory lives in this case.
<Tartarus>
xypron: Yeah, I am, but that means we don't end up with a partition to write efi vars to
<xypron>
Tartarus: if you use MBR partitioning the same partition can have both type ef00 and bootable=yes
<xypron>
Tartarus: why?
<Tartarus>
xypron: Why which? I can't use type ef00 because then the ROM skips that partition to boot from.
<Tartarus>
Why doesn't it write variables? Because the code checks for that flag that's not set
<xypron>
Tartarus: The constraint is part_info->bootable & PART_EFI_SYSTEM_PARTITION. Ok your can one partition with the bootflag. ( e.g. on RPi the firmware partition ) and another partition type ef00
<xypron>
Tartarus: part_info->bootable is set if type=ef00
<Tartarus>
Yeah, that's the workaround I'm doing right now, having a second partitionn
<xypron>
Tartarus: ESP is typically a separate partition
<Tartarus>
xypron: separate from the device firmware?
<Tartarus>
And are distros really happy with that solution?
<Tartarus>
That feels like we're just back to "every board needs special magic"
<Tartarus>
I mean, if everyone is happy to go that route, OK, yes, that makes this less of a problem and I just need to poke TI folks to start partitioning differently
<xypron>
Tartarus: yes: Unmatched wants partitions with specific GUIDs for SPL and uboot.dti
<xypron>
Tartarus: and RPi is anyway very special
<Tartarus>
Where does one need to go to officially declare that your SoCs are also going to be special?
<xypron>
Tartarus: TI should learn using GPT and provide the board with installed UEFI enabled firmware?
<Tartarus>
xypron: Maybe before this decade is out, sure.
<Tartarus>
But this gen/next gen of devices are still going to be msdos partition tables.
<Tartarus>
And they've always been using U-Boot ;)
<xypron>
Tartarus: All SoCs have different boot ROMs which have there ideas of where to find the next boot stage.
<xypron>
Tartarus: E.g. Allwinner will load either from a location that is within the GPT or beyond 1 MiB. So they are special too.
<Tartarus>
Yes
<Tartarus>
Everyone is different
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<sjg1>
apritzel_: buildman probably may not close its files properly, so that could be worth checking. But it seems you found the problem elsewhere
<apritzel_>
sjg1: yeah, my particular problem was apparently only with genboardscfg, which opens four fds per thread
<sjg1>
apritzel_: Well it serves you right for having 256 cores :-)
<apritzel_>
lol, indeed, I suffer heavily every day
<apritzel_>
in fact I found bugs where nr_cores didn't fit in a byte
<marex>
apritzel_: dual epyc ?
<j`ey>
noo it's arm64!
<apritzel_>
marex: Cavium ThunderX2, two sockets, 32 cores each, 4 threads each
<marex>
apritzel_: how is the performance of that, compared to e.g. some threadripper ?
<apritzel_>
the IPC is somewhat wimpy, which shows at the final linking stage, typically
<marex>
is 2022 gonna be the year of arm desktop ?
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<apritzel_>
marex: sad thing is that this machine is already almost 4 years old, and there is not much better available now
<marex>
apritzel_: can that MOLD linker help with that linking stage ?
<apritzel_>
marex: I wouldn't compare it to a Threadripper, really, it's probably much slower, is just happens to be an arm64 machine with many cores, and normal peripherals (DIMM sockets, PCIe, ...)
<j`ey>
mold can't do linkerscripts
<marex>
j`ey: it is highly parallelized from what I saw in the description, so I figured I'd bring it up here
<marex>
apritzel_: nice
<j`ey>
marex: it just wont work for u-boot/kernel :(
<marex>
sometimes I'm just glad the embedded stuff is mostly cortexa53 still, no odd imprecise aborts, no speculation
<apritzel_>
marex: it's very usable as a desktop (with stock Ubuntu and some NVidia gfx), though, and having arm64 natively is really nice
<marex>
j`ey: patches welcome, no ? :)
<j`ey>
marex: not sure, I think they want to try do something different..
<marex>
apritzel_: seems like marvell acquired cavium last march and terminated the server line up in september , so no more x4 ?
<marex>
pity
<apritzel_>
marex: exactly
<sjg1>
Tartarus: I'd like to apply the bloblist patches (and other early ones) from this series before sending std passage v2. WDYT?