U-Boot can be configured via environment variables which can be saved to
various storage devices. This usually defaults to MMC or SPI depending
on where it boots from, but assumes the device's layout is controlled by
U-Boot.
We should store the environment in SPI flash, but we also need to
configure coreboot FMAPs to reserve the area U-Boot would use as its
environment storage. For now, disable environment storage by setting
ENV_IS_NOWHERE=y to avoid overwriting random regions of SPI or MMC if
someone tries to save the variables.
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Set default U-Boot revision to v2023.01 and rebase patches on top of
that. Upstream kconfig status is a bit unstable, so updating configs
with `make oldconfig` would miss important upstream changes.
For each board, run `make savedefconfig` and `diffconfig -m` at the old
version to get a diff from upstream defconfigs. Fix those affected by
upstream changes, like SYS_TEXT_BASE being renamed to TEXT_BASE. Then
append those to the new version's defconfigs and run `make olddefconfig`
to get updated configs.
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Add a series posted to upstream mailing lists that makes the GRUB
text-mode console faster by implementing video damage tracking [1].
Refresh the config files to include its new VIDEO_DAMAGE Kconfig.
Patch 7/7 upstream has a tiny conflict with "Improve UEFI experience"
series we already have, but it's only in the diff context. No changes
other than fixing that.
[1] https://lore.kernel.org/u-boot/20220609225921.62462-1-agraf@csgraf.de/
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Set revision to the commit hash of the v2022.10 release, and run "make
olddefconfig" for all boards to refresh the configs.
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
This adds U-Boot configuration for the Samsung Chromebook Plus (v1),
also known as "chromebook_kevin" in the U-Boot upstream defconfigs. Also
adds a shared "gru" board directory to share with others having the same
baseboard.
It uses v2022.07 with some quality-of-life patches. The first one is a
clock adjustment to match coreboot clocks for the video output, the
second one is a series about text cursor support and larger fonts. These
are because the display has a high resolution of 2400x1600 at 12.3".
The config has the following diffconfig from the upstream defconfig for
this board:
# For chainloading from depthcharge like a payload (RW_LEGACY).
# Not everything might be necessary, but didn't test without these.
INIT_SP_RELATIVE n -> y
LNX_KRNL_IMG_TEXT_OFFSET_BASE 0x00200000 -> 0x18000000
POSITION_INDEPENDENT n -> y
SYS_TEXT_BASE 0x00200000 -> 0x18000000
+SYS_INIT_SP_BSS_OFFSET 524288
# Higher speeds for eMMC
MMC_HS200_SUPPORT n -> y
MMC_HS400_ES_SUPPORT n -> y
MMC_HS400_SUPPORT n -> y
MMC_IO_VOLTAGE n -> y
MMC_SDHCI_SDMA n -> y
MMC_SPEED_MODE_SET n -> y
+MMC_UHS_SUPPORT y
# Build the u-boot.elf to use as a payload
REMAKE_ELF n -> y
# Slightly faster video output
VIDEO_COPY n -> y
# Larger fonts per the applied series
VIDEO_FONT_8X16 y -> n
VIDEO_FONT_TER16X32 n -> y
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Alper Nebi Yasak