This is a series of patches to enable chainloading LineageOS on qcom SOC. Patch #1 introduce kconfig to ignore those default value and use loadaddr instead. That workaround some androidboot image have invalid kernel/ramdisk loadaddr.
Patch #2 override qcom soc loadaddr with fastboot_addr_r as a band-aid. Casey confirmed loadaddr and kernel_addr_r are purposely set to same address for memory-constrain case. A proper fix is far from get ready so this patch can work as a band-aid for maintainer atm. Patch #3 optionally introduce new kconfig and env_var to get hold of legacy OS boot param for boot compatibility. It is designed initially for booting legacy Android, but newer AOSP greatly dependent on kernel bootconfig feature with vendor_boot partition so not very useful for new AOSP based OS. Patch #4 is an example for #3 with snapdragon soc env file Patch #5 is oprtional to default enable #1 for snapdragon machine. Worth mentioning a patch[1] to enable EL1 chainloading kernel is needed. [1] https://lists.denx.de/pipermail/u-boot/2025-April/585995.html To: Tom Rini <tr...@konsulko.com> To: Mattijs Korpershoek <mkorpersh...@kernel.org> To: Simon Glass <s...@chromium.org> To: Casey Connolly <casey.conno...@linaro.org> To: Neil Armstrong <neil.armstr...@linaro.org> To: Sumit Garg <sumit.g...@kernel.org> To: Rayagonda Kokatanur <rayagonda.kokata...@broadcom.com> Cc: u-boot@lists.denx.de Cc: u-boot-q...@groups.io Signed-off-by: George Chan <gchan9...@gmail.com> Changes in v2: - Revised patch #1 to control by kconfig, suggested by Casey - Split old #1 into new #1 and #5 for maintainer to choose. - Revised Casey's approach for #2 and make it as band-aid atm. - Revised Casey's approach for #3 and leave user to bake their own param set. - Introduce example for #1 - Introduce kconfig default for #1 with snapdragon soc, suggested by Casey - Link to v1: https://lore.kernel.org/r/20250427-android-boot-v1-0-bb6b37c9c...@gmail.com --- George Chan (5): boot/image-android: Workaround kernel/ramdisk invalid addr mach-snapdragon: Enhance android image handling memory footprint fdt_support: Add support for extra var for bootargs qcom-phone.env: Example of new env var legacy_os_boot_param mach-snapdragon: Enable workaround of ignoring androidboot addr arch/arm/Kconfig | 1 + arch/arm/mach-snapdragon/board.c | 8 ++++++-- board/qualcomm/qcom-phone.env | 4 ++++ boot/Kconfig | 15 +++++++++++++++ boot/fdt_support.c | 20 +++++++++++++++++++- boot/image-android.c | 9 ++++++--- 6 files changed, 51 insertions(+), 6 deletions(-) --- base-commit: 5a0a93a768487e55ebe50a34cc90d751bf99cc56 change-id: 20250427-android-boot-ecbb768cda72 Best regards, -- George Chan <gchan9...@gmail.com>
