OK3399使用OTG升级变砖的原因？如何解决？

使用OTG升级烧录update.img过程中，USB线松了导致升级失败，重新插入后再试，发现AndroidTool提示的是“发现MASKROM”而不是“发现Loader”，并且在第一步“下载Boot”就会失败，串口此时也无效了。

改用TF卡尝试烧录后，串口有输出，但是最后是提示“WARNING:Please contact Forlinx”：
- DDR Version 1.23 20190709
- In
- Channel 0: LPDDR3, 800MHz
- CS = 0
- MR0=0x58
- MR1=0x58
- MR2=0x58
- MR3=0x58
- MR4=0x2
- MR5=0x1
- MR6=0x5
- MR7=0x0
- MR8=0x1F
- MR9=0x1F
- MR10=0x1F
- MR11=0x1F
- MR12=0x1F
- MR13=0x1F
- MR14=0x1F
- MR15=0x1F
- MR16=0x1F
- Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=32 Size=1024MB
- Channel 1: LPDDR3, 800MHz
- CS = 0
- MR0=0x58
- MR1=0x58
- MR2=0x58
- MR3=0x58
- MR4=0x2
- MR5=0x1
- MR6=0x5
- MR7=0x0
- MR8=0x1F
- MR9=0x1F
- MR10=0x1F
- MR11=0x1F
- MR12=0x1F
- MR13=0x1F
- MR14=0x1F
- MR15=0x1F
- MR16=0x1F
- Bus Width=32 Col=10 Bank=8 Row=15 CS=1 Die Bus-Width=32 Size=1024MB
- 256B stride
- ch 0 ddrconfig = 0x101, ddrsize = 0x20
- ch 1 ddrconfig = 0x101, ddrsize = 0x20
- pmugrf_os_reg[2] = 0x3280D280, stride = 0x9
- OUT
- Boot1: 2019-03-14, version: 1.19
- CPUId = 0x0
- ChipType = 0x10, 245
- SdmmcInit=2 0
- BootCapSize=100000
- UserCapSize=15028MB
- FwPartOffset=2000 , 100000
- mmc0:cmd5,20
- SdmmcInit=0 0
- BootCapSize=0
- UserCapSize=30436MB
- FwPartOffset=2000 , 0
- StorageInit ok = 79443
- SecureMode = 0
- SecureInit read PBA: 0x4
- SecureInit read PBA: 0x404
- SecureInit read PBA: 0x804
- SecureInit read PBA: 0xc04
- SecureInit read PBA: 0x1004
- SecureInit read PBA: 0x1404
- SecureInit read PBA: 0x1804
- SecureInit read PBA: 0x1c04
- SecureInit ret = 0, SecureMode = 0
- atags_set_bootdev: ret:(0)
- GPT 0x3380ec0 signature is wrong
- recovery gpt...
- GPT part: 0, name: Main Data Partition, start:0x800, size:0x3b7138f
- GPT part: 1, name: UEFI:NTFS, start:0x3b71b8f, size:0x400
- recovery gpt success!
- no find partition:uboot.
- LoadTrust Addr:0x4000
- No find bl30.bin
- Load uboot, ReadLba = 2000
- hdr 0000000003380880 + 0x0:0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
- Load OK, addr=0x200000, size=0xdace0
- RunBL31 0x10000
- NOTICE: BL31: v1.3(debug):22b599a
- NOTICE: BL31: Built : 11:03:32, Jul 10 2019
- NOTICE: BL31: Rockchip release version: v1.1
- INFO: GICv3 with legacy support detected. ARM GICV3 driver initialized in EL3
- INFO: Using opteed sec cpu_context!
- INFO: boot cpu mask: 0
- INFO: plat_rockchip_pmu_init(1181): pd status 3e
- INFO: BL31: Initializing runtime services
- INFO: BL31: Initializing BL32
- INF [0x0] TEE-CORE:init_primary_helper:337: Initializing (1.1.0-223-g45f58ab9 #165 Thu Aug 15 00:59:09 UTC 2019 aarch64)
- INF [0x0] TEE-CORE:init_primary_helper:338: Release version: 1.2
- INF [0x0] TEE-CORE:init_teecore:83: teecore inits done
- INFO: BL31: Preparing for EL3 exit to normal world
- INFO: Entry point address = 0x200000
- INFO: SPSR = 0x3c9
- U-Boot 2017.09 (Mar 10 2021 - 02:48:14 +0000)
- Model: Forlinx OK3399 Evaluation Board
- PreSerial: 2
- DRAM: 2 GiB
- Sysmem: init
- Relocation Offset is: 7dbe9000
- Using default environment
- no mmc device at slot 1
- Found IDB in SDcard
- dwmmc@fe320000: 1 (SD), sdhci@fe330000: 0
- Bootdev(atags): mmc 1
- MMC1: Legacy, 50Mhz
- PartType: EFI
- rockchip_get_boot_mode: Could not found misc partition
- boot mode: None
- init_resource_list: failed to get boot part, ret=-1
- init_resource_list: failed to get resource part, ret=-1
- Read kernel dtb failed, ret=-19
- RKPARM: Invalid parameter part table
- *** Warning - bad CRC, using default environment
- In: serial
- Out: serial
- Err: serial
- Model: Forlinx OK3399 Evaluation Board
- board_modify_fdt
- Writing to MMC(0)... done
- display device not found
- rockchip_set_serialno: could not find efuse device
- switch to partitions #0, OK
- mmc1 is current device
- Found IDB in SDcard
- Bootdev(atags): mmc 1
- CLK: (uboot. arml: enter 816000 KHz, init 816000 KHz, kernel 0N/A)
- CLK: (uboot. armb: enter 24000 KHz, init 24000 KHz, kernel 0N/A)
- aplll 816000 KHz
- apllb 24000 KHz
- dpll 800000 KHz
- cpll 24000 KHz
- gpll 800000 KHz
- npll 600000 KHz
- vpll 24000 KHz
- aclk_perihp 133333 KHz
- hclk_perihp 66666 KHz
- pclk_perihp 33333 KHz
- aclk_perilp0 266666 KHz
- hclk_perilp0 88888 KHz
- pclk_perilp0 44444 KHz
- hclk_perilp1 100000 KHz
- pclk_perilp1 50000 KHz
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx
- WARNING:Please contact Forlinx