just to close the loop on this, the issue was the board's gpio.c not be
included in the build, due to being conditional on CONFIG_CHROMEOS in
the board's Makefile.inc - an difference I didn't catch when comparing
with the existing Baytrail ChromeOS reference board (Rambi). Just need
to iron out a few things and will commit the board for review
cheers,
Matt
On 5/14/2016 5:19 PM, Matt DeVillier wrote:
Greetings all! Currently I'm working on getting upstream coreboot +
SeaBIOS working on a Baytrail-based ChromeOS device (NINJA / AOpen
Chromebox commerical). After resolving some config issues which
prevented the board from booting, I'm left with two issues on which
I'm stuck:
1) the internal emmc / sdhci controller fails to initialize, and is
unavailable for boot or OS installation
2) video output works properly for SeaBIOS and grub/syslinux, but
output is disabled once the OS / kernel driver loads
For the emmc, cbmem shows that the sdhci controller is timing out
after setting the initial frequency, somewhere after line 410 of
seabios/src/hw/sdcard.c. Since the same exact SeaBIOS payload works
properly with the stock ChromeOS firmware (in both the RW_LEGACY and
BOOT_STUB slots), I suspect that the issue is with coreboot, but the
SoC init is pretty much identical between upstream and NINJA's CrOS
branch (save for a few base addresses and offset calculations), so not
sure where to start looking. I've also tried putting the sdhci
controller back into PCI mode (vs ACPI) which had no effect.
For the video output, the same vgabios file is being used as stock
CrOS, and same SeaBIOS payload. The i915 kernel driver reports that
no displays are connected, and there are some errors in the drm module
just prior. I tested with a few different flavors of linux as well as
Windows 10, to be certain it wasn't driver-related.
Attached are the cbmem and kernel logs from both working (stock CroS
firmware + upstream SeaBIOS/BOOT_STUB) and non-working (upstream
coreboot+SeaBIOS) cases.
As the board hasn't been officially upstreamed yet (something I will
do once these issues are resolved), source can be found in my github
repo here (it's just 3 commits on top of the current master branch):
https://github.com/MattDevo/coreboot/tree/ninja_upstream
Hopefully someone can point me in the right direction here :)
cheers,
Matt
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