Boot from BL2->BL31->Linux

Hi all, 

I'm new to this booting process. 

I'm trying to boot from ATF to Linux (by passing Uboot/UEFI) on an Intel Agilex board. 

I have follow the instruction over here -> but with no success. 

Here is the UART log (via ARM development studio): 

INFO: DDR: DRAM calibration success.
INFO: Scrubbing ECC
INFO: Error in response: 1f0002ff
ERROR: S2F bridge enable: Timeout waiting for idle ack
INFO: Error in response: 1f0001ff
INFO: Error in response: 1f0001ff
NOTICE: BL2: v2.4.1(debug):rel_socfpga_v2.4.1_21.09.01_pr
NOTICE: BL2: Built : 16:38:38, Sep 14 2021
INFO: BL2: Doing platform setup
INFO: BL2: Loading image id 3
INFO: BL2: Loading image id 5
NOTICE: BL2: Booting BL31
INFO: Entry point address = 0x1000
INFO: SPSR = 0x3cd
ASSERT: plat/intel/soc/agilex/bl31_plat_setup.c:53
0: EL3: 0x6410
1: EL3: 0x8858
2: EL3: 0x3a2c
3: EL3: 0x12f0
4: EL3: 0x1118

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