narmstrong changed the topic of #linux-amlogic to: Amlogic mainline kernel development discussion - our wiki http://linux-meson.com/ - ml linux-amlogic@lists.infradead.org - official channel moved from Freenode - publicly logged on https://libera.irclog.whitequark.org/linux-amlogic
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<f_> lvrp16: what have you said again about how inaccurate Amlogic datasheets are? :P
<f_> pretty much what I have in my laptop
<f_> all datasheets I was able to find. Some redundant though.
<f_> e.g. S805
<f_> but I organised it all.
<f_> Surprisingly DFIODTCFG is somewhat documented
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<f_> ^ lvrp16 short fedi convo between me and orangecms
<lvrp16> f_: there are errors but generally accurate.
<f_> AFAICT e.g. bit 6 in DMC_DDR_CTRL is 'not used'
<f_> but clearly by looking at p212 bl2 it's used.
<f_> ¯\_(ツ)_/¯
<f_> Always gotta verify.
<f_> Saw the cottonwood patches on the mailing list
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<f_> I feel like dram-settings-gx.h should move to a board-specific file
<f_> e.g. p200/spl_dram.h
<f_> That could make more sense and probably should be upstreamed that way. thoughts narmstrong ?
<narmstrong> Probably yes
<f_> After all, amlogic devices supported in U-Boot currently don't really hack acs to work with low bin ram chips, right?
<f_> WeTek doesn't hack acs, same can be said of librecomputer
<f_> Videostrong..no idea, but the WeTek acs works totally fine
<f_> really, WeTek/Videostrong and librecomputer are all I care about
<lvrp16> We take the reference component so it doesn't need customization.
<f_> lvrp16: makes the job easier!
<lvrp16> If we were to modify the reference design, changes are definitely needed.
<lvrp16> Eg, if u need to make the area smaller.
<f_> AFAICT most/all boards U-Boot currently supports are based on the reference design
<f_> still have to compare acs of each single board
<f_> because I think at the same time having to add a brand new 'real' board to U-Boot just for timings in SPL looks a little unnecessary
<f_> and not really worth the effort in my opinion.
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<f_> Don't know why, but I feel like I want to reimplement pyamlboot in C
<f_> I love C.
<narmstrong> lol
<f_> I mean, python is great and all
<f_> USB mode in U-Boot SPL?
<narmstrong> Would be great
<f_> Custom, simple protocol or worldcup?
<narmstrong> Perhaps a build config to select either usb or mmc
<narmstrong> Hard to know which protocol implement
<f_> WorldCup is proprietary anyway
<f_> so I'd go for a simple protocol
<f_> For now U-Boot SPL panics when booted from USB.
<narmstrong> the amlogic G12 boot protocol quite ok, basically the bl2 send "AMLC" requests which contains a size and an offset of the fip, it could be adapted to get a size and an offset of the fit image
<narmstrong> the bl2 has a copy of the fip table when booted as usb
<narmstrong> perhaps it could have the fit dtb and request the fit data which is after the fit dtb blob
<f_> ¯\_(ツ)_/¯
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