Hi, On Thu, 13 Aug 2020 at 13:35, Alper Nebi Yasak <[email protected]> wrote: > > Hi Simon, Marty, > > I'm interested in getting U-Boot to work with Kevin as well, but don't > have a Servo (or the willingness to open up the case yet), so I've been > trying to boot from depthcharge as in README.chromium-chainload. > > I don't have a way to see serial output and I see no other signs of > life. Can you give me a tested configuration that immediately powers-off > or reboots a Kevin so I can confirm what I'm doing works on the > chainloading side? I mean I can boot Linux, but trying the same with > U-Boot just gives me a blank screen even after accounting for a lot of > things. > > Meanwhile, I've wrote some code to automate making depthcharge partition > images, and to enable the display on Kevin (and perhaps Bob). Since I > don't know if chainloading works, I don't know if these are broken or > not either. I'm unsure about sending untested patches to the list, so I > put them up here if you want to take a look (and maybe test/fix them?): > > https://github.com/alpernebbi/u-boot/tree/rk3399-gru-kevin/wip > > They're not really things that'd make a non-booting Kevin boot, though. > I hope at least some of it can be useful in some way.
I have the em100 working and have got to the same point as you, Marty. em100 -s -c gd25lq64 -d /tmp/b/chromebook_kevin/u-boot.rom -r So I suppose that means that SDRAM is running and we just need a SPI driver? I will see if I can figure out what is missing... Update...it seems to just be missing the ID. I pushed a new patch to: https://github.com/sjg20/u-boot/tree/kevin Now I see: Channel 0: LPDDR3, 933MHz BW=32 Col=10 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=2048MB Channel 1: LPDDR3, 933MHz BW=32 Col=10 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=2048MB 256B stride U-Boot SPL 2020.10-rc1-00111-gc31b9b4a3f1-dirty (Mar 10 2021 - 21:48:26 -0700) Trying to boot from SPI U-Boot 2020.10-rc1-00111-gc31b9b4a3f1-dirty (Mar 10 2021 - 21:48:26 -0700) Model: Google Kevin DRAM: 3.9 GiB Cannot find regulator pwm init_voltage MMC: mmc@fe320000: 1, sdhci@fe330000: 0 Loading Environment from MMC... *** Warning - bad CRC, using default environment Got rc -1, expected 100 Failed to probe keyboard 'keyboard-controller' In: serial@ff1a0000 Out: serial@ff1a0000 Err: serial@ff1a0000 Model: Google Kevin Net: No ethernet found. Hit any key to stop autoboot: 0 => No display and various errors on the way up, but at least it boots to a prompt. Regards, Simon
