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<damex>
hi, is it possible to build uboot (and boot) on supported boards completely from upstream without extra blobs from rockchip (rkbin repo?)? atf-2.3 and uboot-2020-04.
<damex>
i am looking at rk3308/rk3328 boards
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<obbardc>
hmm, rk3328 on mainline seems to have all sorts of issues with HDMI under heavy load
<obbardc>
seems like heavy load or things like resizing windows shows horizontal lines
<obbardc>
running Xorg, lxde, mali v20
<obbardc>
also same issue with horizontal lines under weston
<obbardc>
also not sure if related but glxgears on fullscreen shows around 20fps which seems really low
<obbardc>
on rk3328-rock64 and rk3328-roc-cc, mainline master from today, linux-next and also mainline v5.5
<obbardc>
any hints at all would be great
<stikonas>
damex: I think it should be working, but I have not tried. I only have rk3399 (rockpro64
<obbardc>
btw damex: i have rk3328 working without blobs
<obbardc>
the u-boot documentation was a bit cryptic
<stikonas>
well, I think it should be mostly the same as rk3399 installation, you just need to replace u-boot defconfig and atf platform
<obbardc>
but basically build bl31 first with $PLAT set to rk3328, then u-boot defconfig with $BL31 set to the binary created before release/bl31/bl31.elf
<stikonas>
yeah, with SPI flash you can basically have "BIOS/UEFI"
<obbardc>
been meaning to look into that for a while
<stikonas>
well, if I remove my eMMC card, U-boot now tries to boot from USB, then netboot...
<stikonas>
and if eMMC card is inserted, u-boot can boot from ESP partition
<damex>
obbardc: i tried using automatically (by uboot) generated idbloader. it works fine for tpl/spi boot. no need extra mkimage/cat commands to make it.
<obbardc>
nice
<obbardc>
same here, the docs should probably be updated
<damex>
is there some generic recipe (config?) / guideline for building kernel for rockchip? (well, i can build something custom for the board but prefer save time on offloading it to upstream)
<obbardc>
for arm64 use defconfig
<damex>
that's it?
<obbardc>
it's pretty heavy config though since it includes pretty much every useful arm64 config
<damex>
is there some detail about rockchip board support in upstream? i can find ones for allwinner/sunxi but allwinner boards does seem to have its own support matrix.
<damex>
i wonder if i could get away with something like debian 5.4 lts for rk3328
<damex>
(headless - just need ethernet, raw soc support and storage)
<obbardc>
what board?
<obbardc>
i've found rk3328 to be pretty good so far on mainline from v5.4 onwards
<obbardc>
sorry i am not really all that interested in a debian mainline kernel currently
<obbardc>
but it should work well
<damex>
well, i think it is easier to just let them support building and etc themself
<mps>
fwiw, I run mainline kernel for more than a year on rk3399, chromebook samsung one, with some issues/problem have to say
<mps>
and mainline kernel 5.7-rc3 fried speakers on it :(
<Ke>
how did that happen?
<mps>
I don't know, really, I used it with previous versions without problems, and after upgrade to 5.7-rc3 it played some 'cracks' when muted speakers
<mps>
used it for about two years fine, though volume control didn't worked with alsamixer, but was fine with mpv and firefox software volume controls
<mps>
more than a 2 years, maybe 3 I forgot date when I bought it
<obbardc>
boo :(
<mps>
will try to find if I can replace them with something which can fit inside, if not usb soundcard works fine though little impractical to carry around
<obbardc>
speakers or amp blown?
<mps>
I think speakers
<mps>
because I hear sound from machine but is with 'cracks'
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<damex>
is there a way to get hdmi output in uboot for rk3328?