System 76 coreboot/edk2 bootsplash help

• ec

  60 310 8.1 C

  System76 Open Source Embedded Controller (by system76)

  

To start, I followed this post which flashes the embedded controller (ec) firmware to change the keyboard inputs. I was able to clone sys76’s ec repository, run the (dependencies) script to copy some extra files and followed their instructions for copying and modifying a keyboard layout. I used to build the ec firmware (after creating a config file to specify the system I wanted, lemp10, and the custom keymapping file). I then used to flash the firmware to the chip. And it worked! (I made the same change as the reddit post, requiring Fn to use PgUp/Down).

• firmware-open

  111 939 8.6 C

  System76 Open Firmware

  

The ec is only part of the firmware though and doesn’t do any of the boot stuff. So next I wanted to try flashing the whole of the firmware. I cloned sys76’s open-firmware repository, ran the (dependencies) script to copy the extra files and used the to create the firmware. I then followed these instructions and used the script to actually flash the lemp10 firmware to the chip. And it worked again! Although when I booted back up, I got a notification that “new firmware was available”, so I assume the version I used was too new(?) and my system wanted to revert back to a known stable version. I forgot at the time to look at the version numbers.

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• edk2

  1 0 0.0 C

  EDK II (by system76)

  

Now I knew I could flash my Lemur Pro with the “normal” sys76 firmware, I dug into the, script to work out what it was doing. It appears to consist of two parts: building the coreboot firmware (coreboot.rom, which I believe is renamed later in the script to firmware.rom) and building the ec firmware (ec.rom) <<< the ec is the bit I built/flashed in isolation for the keyboard changes. From what I’ve read about coreboot, it initially turns the system on and then delivers a package which contains the rest of the instructions to get the system started. The package that sys76 delivers with coreboot appears to be EDKII.

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