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<swiftgeek>
can I override a GPIO without changing DT?
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<swiftgeek>
lol gotta love how every set of pads for soldering wires is marked as speaker
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<swiftgeek>
yeah this makes it much easier to sanity check whether schematics is actually about Q8 board
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<swiftgeek>
yeah pretty much when LCD/backlight disappears I get 'panel-simple panel: Specify missing connector_type'
<swiftgeek>
and axp20x-gpio doesn't have initcall so i guess I can't blacklist it
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<swiftgeek>
oh it's axp20x_pctl
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<swiftgeek>
so with initcall_blacklist=axp20x_pctl_driver_init I get working display on Q8
<libv>
swiftgeek: hah, that's quite insane
<swiftgeek>
axp20x's gpios are only used for toggling power to backlight/lcd, so blacklisting entire pinctrl seemed easier/more reliable than messing with DT
<swiftgeek>
unless I can override GPIOs somehow easily
<swiftgeek>
but at least now i know that video is being output, and both lcd/backlight gets power
<swiftgeek>
maybe wrong polarity of those GPIOs in DT?
<swiftgeek>
welp, I no longer get backlight controls in sysfs
<swiftgeek>
but at least i get video output xD
<swiftgeek>
so maybe i broke a lot more after all
<swiftgeek>
i mainly wanted to get output from one A13 board, where UART isn't easily accessible, so I can look at something between kernel start and ttyGS0 being ready for login
<paulk>
swiftgeek: then I guess u-boot is setting things up right for you and somehow linux doesn't?
<swiftgeek>
yep
<swiftgeek>
that happens quite a lot, even for rk3288/A20 and EHCI
<paulk>
huh
<swiftgeek>
the most reproducible fail of ehci for me is when trying to boot from it as rootfs
<swiftgeek>
then times it works is below 1 in 20
<swiftgeek>
if i boot from mmcblk, it appears to be fine with some devices
<paulk>
on A20?
<swiftgeek>
and rk3288
<paulk>
mhh I kinda remember doing usb boot back in the days
<paulk>
especially on rk3288 chromebooks
<paulk>
that was with coreboot+depthcharge though
<swiftgeek>
it looks like a kernel regression to me
<swiftgeek>
but haven't ruled out dtb regression yet
<swiftgeek>
I think 5.11 is still fine
<swiftgeek>
but i don't even have last kernel version that isn't broken yet for now i know that 5.16/5.17 is broken, maybe it's even fixed on newer ones and I don't know about that yet
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<swiftgeek>
rebuilding distro kernel is a bit challenging
<swiftgeek>
especially since i messed up my H3 board
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<swiftgeek>
aww nobody did a teardown of V3s yet
<MoeIcenowy>
swiftgeek: how do you want to teardown it?
<MoeIcenowy>
see how two dies are connected together?
<swiftgeek>
well if it was me i would just use blowtorch, as it's the easiest/quickest way
<MoeIcenowy>
apritzel: BTW by checking D1 document, the die seems to have many pinmuxes available for UART0...
<swiftgeek>
acid would be better
<MoeIcenowy>
The one used on D1 Nezha is not the one available on T113
<swiftgeek>
but I also don't have metallurgical microscope so it wouldn't be interesting if I did it myself
<libv>
when the filenames are english, everyone knows what is the content, and can then dl the file and google translate the internals
<libv>
when the filenames are in chinese, almost no-one with free (as in freedom) internet access has any use of this
<swiftgeek>
nah, normally you would just look into HDK dir, and not search for individual file
<swiftgeek>
and allwinner isn't even providing anything what one would expect from serious chip vendor
<swiftgeek>
BSDL, IBIS, Flowtherm models
<swiftgeek>
at least they make those reference fanouts for like two stackups I think, but it's seriously lacking
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<MoeIcenowy>
apritzel: BTW h6_ddr3_1333.c seems to be not DDR3-1333 but DDR3-1600
<MoeIcenowy>
because it uses CL = 11
<MoeIcenowy>
which is only supported on DDR3-1600+ according to JESD79-3F
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<apritzel>
MoeIcenowy: yeah, there is a lot of confusion about what the timing really is, and some values set by AW are quite off when compared to any JEDEC standard
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<bauen1>
Using the soft-spi driver my tpm2 worked quite well, and the pine a64-lts even has a reset pin. This means that u-boot/linux can't reset/clear the tpm on their own which is essential to making it useful. That's a decent setup, if you just ignore the minor security issue of a complete lack of secure / authenticated boot.
<bauen1>
I guess there's always ordering an SPI ROM and burning the sdcard and USB port. or maybe just buy an SBC that was designed for this :D
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