The initial capsule update support only worked on the RB3 Gen 2 and made a lot of assumptions specific to that board.
Implement the logic necessary to update U-Boot no matter where it was flashed to, independent of any particular board. First, we keep track of how U-Boot was loaded, specifically if we had a valid external FDT (even if we didn't use it) this indicates that we were booted via the Android bootloader, in this case the target for capsule updates is the boot partition. Otherwise, we target the uefi partition (if it exists) or the xbl partition. We handle A/B support for all 3 (currently we always flash to the currently active partition with a minor exception for the uefi partition). We introduce two new fw_name strings to differentiate the GUIDs based on the target partition, this means one board can support multiple boot methods with capsule update support for all of them (typically this would be chainloading OR flashing U-Boot to XBL). Lastly, the call to scsi_scan() in dfu_scsi.c is removed. Since scsi_scan() unbinds all scsi devices it breaks device handles maintained in the EFI layer for the duration of the capsule update process and causes the EFI filesystem access to delete the capsule file after the update to fail. Boards should instead be responsible for calling scsi_scan() before initiating DFU. --- Changes in v2: - Restrict the partition hunt to either UFS storage or the first MMC device so that we never accidentally write to some external storage (like an sdcard) during a capsule update. - Fix typo - Link to v1: https://lore.kernel.org/r/20250326-b4-qcom-capsule-update-improvements-v1-0-afe2e3696...@linaro.org --- Caleb Connolly (4): mach-snapdragon: track boot source mach-snapdragon: CapsuleUpdate: support all boot methods dfu: scsi: don't call scsi_scan() qcom_defconfig: enable capsule update support arch/arm/mach-snapdragon/board.c | 26 +++ arch/arm/mach-snapdragon/capsule_update.c | 274 ++++++++++++++++++++++++------ arch/arm/mach-snapdragon/qcom-priv.h | 14 ++ configs/qcm6490_defconfig | 6 - configs/qcom_defconfig | 3 + drivers/dfu/dfu_scsi.c | 5 - 6 files changed, 266 insertions(+), 62 deletions(-) --- base-commit: 885d68280c29b8011731b6a7cdac32b8d9a4e6fd change-id: 20250326-b4-qcom-capsule-update-improvements-16ff7bc2d1d2 Caleb Connolly <caleb.conno...@linaro.org>
