Update the chromebook elm configuration to use v5.9 instead of an
intermediate release candidate.
At the latter stages of the v5.9 release, a patch was added which
broke the Chromebook Elm HDMI. Therefore add a revert patch to get rid
of this problem. The fix (and the revert) are already on the mailing
list (https://lkml.org/lkml/2020/10/10/32) and should become available
with v5.10
Signed-off-by: Bilal Wasim <bilal.wasim@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit adds supports for building buildroot kernel + rootfs
for MT8173 Elm board, also known as Chromebook Elm
(https://www.acer.com/ac/en/US/content/series/acerchromebookr13).
Though Chrome-OS is officially supproted on this board, the
mainline kernel works as well (benchmarks + conformance), and so
the 5.9 kernel is used. As the 5.9 kernel isn't yet released, we
use the 5.9-rc5 for now, which will be up-revd to 5.9 once its
released.
Using the mainline kernel means that we have to apply certain patches
to get the HDMI screen working. These patches are lying in the
"drm-misc-next" list and will make it to the kernel after 5.9. At that
time, we will remove the patches and point Buildroot to use the latest
kernel (hopefully, 5.10).
This commit also adds an ITS file (for creating FIT images), an ARGS
file (for providing kernel args) and a "sign.sh" script to generate
signed kernel images. Though the "sign.sh" is very similar to the
coresponding file under board/chromebook/snow, it cannot be shared
between both boards, as the script requires access to the board
specific its / args file.
Additionally a readme & defconfig is added to help the user get started.
Signed-off-by: Bilal Wasim <bilalwasim676@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
The same script is going to be used by the Chromebook Elm to generate
a bootable SD / USB image. Therefore, move the script out of the snow
folder to one level above (board/chromebook/snow -> board/chromebook).
Update the chromebook_snow_defconfig to reflect the new location of
the script.
Signed-off-by: Bilal Wasim <bilalwasim676@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
No other changes necessary, 4.15 builds and boots fine.
Signed-off-by: Alex Suykov <alex.suykov@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Since things are no longer installed in $(HOST_DIR)/usr, the callers
should also not refer to it.
This is a mechanical change with
git grep -l 'HOST_DIR}\?/usr/' board | xargs sed -i 's%\(HOST_DIR}\?\)/usr/%\1/%g'
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
No significant changes but 4.6.3 moved parts of the device tree
into a different file, so dts patch must be updated.
[Peter: explicitly configure kernel headers for 4.6]
Signed-off-by: Alex Suykov <alex.suykov@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Chromebook Snow (Samsung XE303C12) is an Exynos 5 board with
a keyboard, an 11 inch screen and a battery attached.
It is relatively developer-friendly and can run mainline Linux
kernels with little to no effort.
There is barely anything special about this target as far as toolchain
is concerned, but its bootloader only accepts signed kernel images
in a Chromium OS specific format, and is not controllable otherwise.
This config provides a script for building the proper kernel blobs,
and a short manual for booting Buildroot images on this device.
In-tree exynos_defconfig is used for the kernel, with a fragment
to change mwifiex into a module. When built statically, mwifiex
attempts to load its firmware before rootfs is mounted and fails.
[Peter: use BR2_KERNEL_HEADERS_AS_KERNEL=y, lock kernel version,
enable fit support in u-boot mkimage]
Signed-off-by: Alex Suykov <alex.suykov@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
