您好，我们想在 tda4 vm开发版上 ，适配三星的lpddr4(型号K4FBE3D4HM-TFCL)，在uboot时卡住了。
错误信息如下：
U-Boot SPL 2020.01-dirty (Mar 31 2021 - 14:04:01 +0800)
SYSFW ABI: 3.1 (firmware rev 0x0014 '20.8.5--v2020.08b (Terrific Lla')
Reading on-board EEPROM at 0x50 failed -1
j721e_ddrss_probe(dev=41c87c28)
j721e_ddrss_ofdata_to_priv(dev=41c87c28)
j721e_ddrss_power_on(ddrss=41cda7c4)
LPDDR4_Probe: PASS
LPDDR4_Init: PASS
--->>> LPDDR4 Initialization is in progress ... <<<---
counter:10
j721e_lpddr4_ack_freq_upd_req: received freq change req: req type = 1, req no. = 0
j721e_lpddr4_ack_freq_upd_req: received freq change req: req type = 0, req no. = 1
j721e_lpddr4_ack_freq_upd_req: received freq change req: req type = 1, req no. = 2
j721e_lpddr4_ack_freq_upd_req: received freq change req: req type = 0, req no. = 3
j721e_lpddr4_ack_freq_upd_req: received freq change req: req type = 1, req no. = 4
wait_for_bit_le32: Timeout (reg=114080 mask=80 wait_set=)
Timeout during frequency handshake
### ERROR ### Please RESET the board ###
请问该怎么解决，非常感谢
