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<icenowy[m]>
jernej: for the DRAM speed (latency?) issue please help me
<jernej>
icenowy[m]: what exactly?
<jernej>
check code?
<jernej>
icenowy[m]: I have to go now, but please leave here links to exact code where you need the help. Today I won't have much time, but enough in following days
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<icenowy[m]>
ok just my h6-dram code here
<icenowy[m]>
with it booted and run tinymembench
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<jernej>
icenowy[m]: What are the symptoms? Crashes with reverse engineered code and doesn't crash with libdram?
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<gillesM>
Hi I use buildroot and when I try bin2fex I got fexc-bin: Malformed data: version 1710260058.3858759680
<tkaiser>
icenowy[m]: Do you have tinymembench numbers? Can you share?
<t3st3r>
I think I've read that, but it does not tells how to DISABLE that feature?
<t3st3r>
but I'll re-read to be extra sure
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<t3st3r>
tkaiser> I think I know everything written here. Yet it does not answers how to make Linux kernel to stop exposing THAT to everyone.
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<icenowy[m]>
tkaiser: no I can't as they're buggy numbers
<tkaiser>
ok
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<t3st3r>
icenowy[m]> do you mean I can set cpu serial env in uboot, so it would take precedence over efuses? Or what? I believe uboot I've built lacks that env.
<icenowy[m]>
I think so
<t3st3r>
Hmm, interesting, I guess I should try that.
<t3st3r>
I'm also curious, where in source code Linux gets cpu serial # set? Those who coded efuses -> serial # should know that :)
<BenG83>
there is a sid driver
<t3st3r>
I can see e.g. qemu VM always sets 00000... as serial# (though VM does not uses uboot and emulates vexpress)
<t3st3r>
So its SID driver which calls some Linux facility?
<BenG83>
/drivers/nvmem/sunxi_sid.c
<icenowy[m]>
BenG83: for /proc/cpuinfo it's provided by device tree
<BenG83>
oh ok
<BenG83>
but then it should be easy to change?
<t3st3r>
BenG83> thx. Has been searching for that for a while
<BenG83>
grep -r SID | grep sunxi :P
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<t3st3r>
I guess icenowy[m] referred to the fact some boards set uboot env var as their serial, it has been before device trees I guess
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<t3st3r>
and I wonder if it would work, dt also sounds like a plan, thanks
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<BenG83>
you can browse /sys/... for the property perhaps
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<BenG83>
icenowy[m], have you tried USB3 on H6?
<t3st3r>
BenG83> I'm feeling myself stupid but I fail to spot place which changes CPU serial # in Linux in /drivers/nvmem/sunxi_sid.c ;)
<BenG83>
that is for reading the SID registers
<BenG83>
I don't think you can change them
<BenG83>
but now you can go look who else is using it
<t3st3r>
I wonder how Linux sets cpu serial # overall on ARM or so.
<t3st3r>
and no, I'm not going to try to write to efuese, it sounds like bad idea to me
<BenG83>
I only get [ 1.991374] dwc3 5200000.dwc3: failed to initialize core
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<icenowy[m]>
BenG83: usb3 phy driver enabled?
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<BenG83>
probably not, I am still using defconfig at the moment
<BenG83>
anything else I can enable while I am at it?
<BenG83>
Ethernet seems ok, USB2 works
<BenG83>
PCIe?
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<t3st3r>
is this H6 thing promising btw?
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<t3st3r>
and am I correct one can't boot ARM64 without dealing with arm "trusted" firmware?
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<BenG83>
t3st3r, I think it depends if the USB3 and PCIe are bandwith limited
<icenowy[m]>
MoeIcenowy: pcie never works
<BenG83>
if the 1.8Ghz are stable those are pretty fast A53 cores though
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<BenG83>
PHY_SUN50I_USB3? do I need USB_DWC3_ULPI?
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<BenG83>
ok works
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<elros_>
I set hrtimer period to 100us but it still timout at 200ms. CPU is A13, why is that?
<icenowy[m]>
P.S. I didn't get proper USB3 performance
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<t3st3r>
is it faster than usb2 at least?
<BenG83>
well with the current DRAM speed limit maybe not, just testing
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<icenowy[m]>
no strangely it's slower than usb2
<BenG83>
indeed
<icenowy[m]>
I don't know what happened
<icenowy[m]>
orz
<BenG83>
I got about 10MB/s with USB2 and 5MB/s with USB3 on this USB3 stick
<BenG83>
should be around 60-90MB/s
<BenG83>
mmc seems to be ok
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<jernej>
icenowy[m]: Is the issue with H6 DRAM in the part of the code where just constants are written to registers?
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<embed-3d>
hanni76: the branch should work for bpi-m2 since there are also the dtb fixes in it, the ths patchseries is now on delay since I'm debugging the whole weekend ...
<hanni76>
embed-3d: so the booting issue happens due to clk ?