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Le voici une fois rajouté les 3 lignes.
ODROIDXU-UBOOT-CONFIG

U-Boot Parameters (DO NOT MODIFY)

setenv version 3.10
setenv zimage zImage
setenv fdtbin exynos5422-odroidxu3.dtb
setenv videoconfig "drm_kms_helper.edid_firmware=edid/1280x1024.bin"
setenv console "console=ttySAC2,115200n8 consoleblank=0 vt.global_cursor_default=0"
setenv HPD "false"
setenv hdmi_phy_control "HPD=${HPD} vout=${vout}"

setenv zimage_addr_r 0x40008000
setenv fdtbin_addr_r 0x44000000

setenv fdt_high "0xffffffff"

Default boot argument

setenv bootrootfs "root=/dev/mmcblk0p2 rootwait ro"
setenv console "console=ttySAC2,115200n8 consoleblank=0 vt.global_cursor_default=0"
setenv bootargs "${bootrootfs} ${console} ${videoconfig}"

boot commands

fatload mmc 0:1 ${zimage_addr_r} ${zimage}
fatload mmc 0:1 ${fdtbin_addr_r} ${fdtbin}

fdt addr 0x44000000
if test "${cecenable}" = "false"; then fdt rm /cec@101B0000; fi

setenv bootargs "${bootrootfs} ${console} governor=${governor} ${videoconfig} ${hdmi_phy_control}"

bootz ${zimage_addr_r} - ${fdtbin_addr_r}

Merci pour ton aide.