build.sh: output BL2 when build BL2 + FIP

[lgs2007m]

No description provided.

[CTCD]

_ No description provided. _

What is the file BL2.bin? If I don't flash BL2.bin, can uboot start normally?

[lgs2007m]

_ No description provided. _

What is the file BL2.bin? If I don't flash BL2.bin, can uboot start normally?

Only the stock BL2 and FIP which builted with secure boot need to be rebuilt and replaced together. Flashing only the FIP will result in bricking.

As of now, we have only found the BL2 and FIP of the JDCloud RE-CP-03 ware builted with secure boot. Therefore, for the JDCloud RE-CP-03, both BL2 and FIP need to be flashed, while others which builted without secure boot only require flashing FIP.

BTW, in case of hardware modifications, it is also necessary to recompile and flash BL2 and FIP.

You can learn something about BL2 and secure boot in the file MT7986_Secure_Boot_Quick_Start_20220126_v1.2.pdf

[CTCD]

_ No description provided. _

What is the file BL2.bin? If I don't flash BL2.bin, can uboot start normally?

Only the stock BL2 and FIP which builted with secure boot need to be rebuilt and replaced together. Flashing only the FIP will result in bricking.

As of now, we have only found the BL2 and FIP of the JDCloud RE-CP-03 ware builted with secure boot. Therefore, for the JDCloud RE-CP-03, both BL2 and FIP need to be flashed, while others which builted without secure boot only require flashing FIP.

BTW, in case of hardware modifications, it is also necessary to recompile and flash BL2 and FIP.

You can learn something about BL2 and secure boot in the file MT7986_Secure_Boot_Quick_Start_20220126_v1.2.pdf

CONFIG_TARGET_ALL_NO_SEC_BOOT=y mean to use secure boot?

[lgs2007m]

_ No description provided. _

What is the file BL2.bin? If I don't flash BL2.bin, can uboot start normally?

Only the stock BL2 and FIP which builted with secure boot need to be rebuilt and replaced together. Flashing only the FIP will result in bricking.
As of now, we have only found the BL2 and FIP of the JDCloud RE-CP-03 ware builted with secure boot. Therefore, for the JDCloud RE-CP-03, both BL2 and FIP need to be flashed, while others which builted without secure boot only require flashing FIP.
BTW, in case of hardware modifications, it is also necessary to recompile and flash BL2 and FIP.
You can learn something about BL2 and secure boot in the file MT7986_Secure_Boot_Quick_Start_20220126_v1.2.pdf

CONFIG_TARGET_ALL_NO_SEC_BOOT=y mean to use secure boot?

"NO_SEC_BOOT" is an abbreviation for NO Secure Boot, mean not to use secure boot.
"ALL" mean to build BL2 and FIP.

[CTCD]

ware builted with secure boot

CONFIG_TARGET_NO_SEC_BOOT=y means no secure boot, CONFIG_TARGET_ALL_NO_SEC_BOOT=y means with secure boot?
How did you know JDCloud RE-CP-03 comes with secure boot? How do I know if a device has Secure Boot?

[lgs2007m]

ware builted with secure boot

CONFIG_TARGET_NO_SEC_BOOT=y means no secure boot, CONFIG_TARGET_ALL_NO_SEC_BOOT=y means with secure boot? How did you know JDCloud RE-CP-03 comes with secure boot? How do I know if a device has Secure Boot?

You should read the source code, the answer is in it. Whether a device has Secure Boot, check the TTL bootlog.

[CTCD]

ware builted with secure boot

CONFIG_TARGET_NO_SEC_BOOT=y means no secure boot, CONFIG_TARGET_ALL_NO_SEC_BOOT=y means with secure boot? How did you know JDCloud RE-CP-03 comes with secure boot? How do I know if a device has Secure Boot?

You should read the source code, the answer is in it. Whether a device has Secure Boot, check the TTL bootlog.

OK, thank you for your enthusiastic answer