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<panioluka[m]>
Hi
<panioluka[m]>
This is linux amlogic group? My messages goes to irc ok? As i am writing from matrix.
<hipboi_>
[Tom Cubie] Hi, panioluka, the message is receiving ok, I am reply from telegram
<panioluka[m]>
Super, thanks! So be prepared for stupid questions ;)
<panioluka[m]>
So i have x96 max + tv box. With s905x3 chip, i already booted archlinuxarm and armbian ok. Now i have qestion, how to flash mainline uboot?
<chewitt>
the flashing part is simple
<chewitt>
creating a mainline u-boot that boots on crap tv-box hardware is the challenge
<chewitt>
i.e. you need the fip files for the box
<chewitt>
with the right ram timings
<hipboi_>
[Tom Cubie] can we get the fip files from the factory firmware?
<panioluka[m]>
<chewitt "creating a mainline u-boot that "> ouch i thought bootloaders depends mostly on soc, not on hw
<chewitt>
sadly not
<chewitt>
esp. with tv boxes where cheap vendors use cheap ram chips
<panioluka[m]>
Hm need to check what coreelec do, as it broken bootloader (now it boots only crappy android boot images instead of normal kernel and initrd)
<panioluka[m]>
as corelec have kernel and rd in one android boot image
<panioluka[m]>
mb some injection to bl?
<panioluka[m]>
<chewitt "esp. with tv boxes where cheap v"> lol i can check what ram chips are there
<panioluka[m]>
but why cant we use always low clock for ram?
<panioluka[m]>
we dont need high clock of ram in bl
<chewitt>
it's about correct timing data not speed
<panioluka[m]>
oh
<panioluka[m]>
<chewitt "it's about correct timing data n"> And one more qestion, as i came from mobile devices world, what about signature. Do bootrom check bl signature?
<chewitt>
u-boot must be signed and then written to the correct sectors on boot media for the SoC to 'see' the bootloader and use it
<panioluka[m]>
<chewitt "u-boot must be signed and then w"> And must be probably sigend with vendors private key, that is indeed not publicly avalible?
<chewitt>
most devices do not have secure bootloaders, but some devices do (inc. some tv boxes)
<chewitt>
Amlogic provides closed-source blobs for the early stages
<panioluka[m]>
<chewitt "most devices do not have secure "> at least that makes me happy
<chewitt>
panioluka[m] btw, I wouldn't bother with trying to get mainline u-boot directly on a tv box, you can chainload it from vendor u-boot if you're desperate
<chewitt>
but it will be easier to just work with the known-working u-boot that's already installed
<panioluka[m]>
<chewitt "but it will be easier to just wo"> makes sens ;)
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<panioluka[m]>
going to reinstall stock rom and flash evrything agin
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<panioluka[m]>
ok i have stock
<panioluka[m]>
so how to boot something linux based, from sd and keep bl unchanged?
<panioluka[m]>
so start from remote will work
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<chewitt>
what distro do you want to run? .. what's your use-case?
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