Hi Sam,
On Wed, Feb 19, 2020 at 08:27:52PM +0200, Sam Protsenko wrote:
When applying DTBO on top of DTB (with "fdt apply" command) on AM57x EVM board, there is not enough memory reserved in RAM for DTB blob. Hence, DTBO can't be merged in DTB. It leads to inability to boot Android with next error message:
failed on fdt_overlay_apply(): FDT_ERR_NOSPACETo overcome that issue let's provide 1 MiB of space to keep DTB and all merged DTBO blobs. To do so, "length" parameter should be specified for "fdt addr" command:
=> fdt addr $fdtaddr 0x100000
I am not an everyday user of this platform, hence curious what are the usual sizes of DTB and DTBO files employed in Android booting?
For comparison, below are the sizes of R-Car3 DTB (Linux v5.6-rc2):
$ du -sh arch/arm64/boot/dts/renesas/r8a779*dtb | sort -n 32K arch/arm64/boot/dts/renesas/r8a77961-salvator-xs.dtb 32K arch/arm64/boot/dts/renesas/r8a77980-v3hsk.dtb 44K arch/arm64/boot/dts/renesas/r8a77990-ebisu.dtb 52K arch/arm64/boot/dts/renesas/r8a77965-ulcb.dtb 60K arch/arm64/boot/dts/renesas/r8a77960-ulcb.dtb 60K arch/arm64/boot/dts/renesas/r8a77965-salvator-x.dtb 60K arch/arm64/boot/dts/renesas/r8a77965-salvator-xs.dtb 60K arch/arm64/boot/dts/renesas/r8a77965-ulcb-kf.dtb 64K arch/arm64/boot/dts/renesas/r8a77960-salvator-x.dtb 64K arch/arm64/boot/dts/renesas/r8a77960-salvator-xs.dtb 64K arch/arm64/boot/dts/renesas/r8a77960-ulcb-kf.dtb 68K arch/arm64/boot/dts/renesas/r8a77950-ulcb.dtb 68K arch/arm64/boot/dts/renesas/r8a77951-ulcb.dtb 72K arch/arm64/boot/dts/renesas/r8a77950-salvator-x.dtb 72K arch/arm64/boot/dts/renesas/r8a77950-ulcb-kf.dtb 72K arch/arm64/boot/dts/renesas/r8a77951-salvator-x.dtb 72K arch/arm64/boot/dts/renesas/r8a77951-salvator-xs.dtb 72K arch/arm64/boot/dts/renesas/r8a77951-ulcb-kf.dtb
FWIW based on the above values, Renesas scripts reserve 512K for DTB.
Also add size variables to 'adtimg' command invocations, to avoid cluttering the console with DTBO blob sizes.
Looks good to me.
Signed-off-by: Sam Protsenko joe.skb7@gmail.com
Reviewed-by: Eugeniu Rosca rosca.eugeniu@gmail.com