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<wens>
dsimic: not sure. I put it back in its case for the time being
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<dsimic>
wens: I've been thinking about the source of ticking, and I'm not really sure what could be causing it... sometimes capacitors produce faint ticking, but it should stop after a couple of seconds after power is removed
<dsimic>
qschulz: in the next couple of days I'll see to implement the support in scripts/Makefile.dtbs for what I was proposing in my last response in your DT overlay test series
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<qschulz>
dsimic: I am now wondering if the base DTB isn't compiled twice. Once from the dtb-${CONFIG_ARCH_ROCKCHIP} explicit list, and once from the overlay application test
<qschulz>
because the former generates the base DTB without the symbols, and the latter with
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<dsimic>
qschulz: hmm... FWIW, what we end up with, when "make dtbs" completes, is the variant of the base .dtb file with symbols
<qschulz>
dsimic: yes, but what's the point of building it twice (I haven't checked yet that's the case)
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<dsimic>
I'm not sure that it gets built twice, which would require additional messages to be achoed back
<dsimic>
s/achoed/echoed/
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<wens>
dsimic: it sounds more mechanical than buzzing sounds from oscillation though
<dsimic>
wens: huh, that's even more strange
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<robmur01>
ticking while "off" sounds likely be a switching regulator constantly restarting because its load/supply isn't enough to reach stable regulation
<robmur01>
essentially coil whine, but at ~1Hz :)
<dsimic>
robmur01: but how can that be happening for a while with no power supplied to the board?
<dsimic>
it dousn't sounds feasible for the capacitors to be able to supply enough power for something like that, for more than a second or maybe two
<dsimic>
s/sounds/sound/
<dsimic>
s/dousn't/doesn't/
<dsimic>
sorry for the typos
<robmur01>
dsimic: I say "off" on the assumption that "powered off" means soft-off by the PMIC, not plug pulled completely
<dsimic>
ah, so we made different assumptions :)
<dsimic>
let's ask wens for a clarification
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<wens>
robmur01: could be, and yes, "powered off" means soft-off by the PMIC, i.e. after `shutdown -h`
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<qschulz>
Kwiboo: interesting that your generic RK3399 image requires the DDR blob from Rockchip
<qschulz>
(and a bit sad :/)
<qschulz>
I vaguely recall someone telling me my predecessors were attempting at resolving this by runtime detecting the DRAM type
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<beeble>
qschulz: not ddr3/ddr4 autoselection. that was still a compiletime thing
<beeble>
qschulz: it was just that the ddr3 init of jagan was a bit earlier on the list
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<Kwiboo>
qschulz: hehe, since it is only the rk ddr blob's that support multiple dram types, that is what needed to be used ;-)
<Kwiboo>
I am not afraid to use blobs, most/all of my linux and bootloader development is done using a Windows host :-D
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