Hi Piotr, > Hi all, > I'm working on support for PC Engines APU2 (AMD GX-412TC) board and I > finally manage to boot Voyage Linux and run memtest86+. There some > limitations and concerns that I have and hope you can advise how to > proceed. > > 1. Platform doesn't show anything on UART after power off. It works fine > when going through reset after flashing new firmware. It seems to do > something because LEDs light up. Any idea what can be wrong or how to > approach that ? > > 2. Platform boots only with AGESA <= 1.0.0.3. With newer version (>= > 1.0.0.4) it hangs right after passing control to Linux (GRUB seems to > work fine). Binary from master (1.0.0.A) reboots in the same place when > it pass control or start testing memory. Anyone saw similar behavior ? > If yes what is the approach to debug that ? Or maybe there known fixes > for that ? I added Rudolf Marek as reviewer maybe he has an idea. > > 3. APU2 got only UART interface and to make it accept input character I > had to port some changes from out of tree SeaBIOS. I managed to merge it > with upstream version and it seems to work for APU2. Some of those > changes are very specific to APU2. Code is here: > https://github.com/pcengines/seabios/commits/apu2-support > > At this point, for testers (if any), I changed Makefiles to point to > gihub repo, but wonder if pushing those changes make sense before > merging APU2 support ? It would make sense to push a change for the seabios project itself and select it for the apu2 change. In general it will take some time to land your changes in tree ;) so just do it now ! > > 4. I also had to modify memtest86plus because it hanged on code looking > for SPD. This platform do not use memory modules, just chips soldered on > board. At this point there is SPD_DISABLE define that disable SPD > reading. I'm not sure if this is correct approach and if this should be > pushed for review before proving it work ? > https://github.com/pcengines/memtest86plus/commits/apu2 > > My changes to coreboot are under review here: > https://review.coreboot.org/#/c/14138/ > > Any help appreciated. > Best Regards Philipp
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