mt6735 - preloader neded due to dram config - entity not found

[robertvanels]

Its starting in the brom mode via the testpoint. But I get an error on the emmc or due to an unknown dram config? Its a Samsung J2 Prime SM-G532M. Or is it possible the eMCC isn't responding due to the 0x00 value at: [14:24:40]: EMMC_INFO: 0x0

Preloader - 	CPU:			MT6735/T,MT8735A()
Preloader - 	HW version:		0x0
Preloader - 	WDT:			0x10212000
Preloader - 	Uart:			0x11002000
Preloader - 	Brom payload addr:	0x100a00
Preloader - 	DA payload addr:	0x201000
Preloader - 	CQ_DMA addr:		0x10217c00
Preloader - 	Var1:			0x28
Preloader - Disabling Watchdog...
Preloader - HW code:			0x321
Preloader - Target config:		0x5
Preloader - 	SBC enabled:		True
Preloader - 	SLA enabled:		False
Preloader - 	DAA enabled:		True
Preloader - 	SWJTAG enabled:		True
Preloader - 	EPP_PARAM at 0x600 after EMMC_BOOT/SDMMC_BOOT:	False
Preloader - 	Root cert required:	False
Preloader - 	Mem read auth:		False
Preloader - 	Mem write auth:		False
Preloader - 	Cmd 0xC8 blocked:	False
Preloader - Get Target info
Preloader - BROM mode detected.
Preloader - 	HW subcode:		0x8a00
Preloader - 	HW Ver:			0xcc00
Preloader - 	SW Ver:			0x0
Preloader - ME_ID:			8FFCFC75989816606C49D262943BE688
Preloader - Jumping to 0x200000
Preloader - Jumping to 0x200000: ok.
DeviceClass - [Errno 2] Entity not found

GUI debuglog

[14:24:40]: Device detected :)
[14:24:40]: Auth file is required. Use --auth option.
[14:24:40]: Device is protected.
[14:24:40]: Device is in BROM-Mode. Bypassing security.
[14:24:40]: Loading payload from mt6735_payload.bin, 0x258 bytes
[14:24:40]: Kamakiri Run
[14:24:40]: Done sending payload...
[14:24:40]: Successfully sent payload: /home/tdo/mtkclient/mtkclient/payloads/mt6735_payload.bin
[14:24:40]: Device detected :)
[14:24:40]: Device is in BROM mode. No preloader given, trying to dump preloader from ram.
[14:24:40]: Failed to dump preloader from ram, provide a valid one via --preloader option
[14:24:40]: Uploading legacy da...
[14:24:40]: Uploading legacy stage 1 from MTK_DA_V5.bin
[14:24:40]: Legacy DA2 is patched.
[14:24:40]: Legacy DA2 CMD F0 is patched.
[14:24:40]: Legacy Read is normal.
[14:24:40]: Got loader sync !
[14:24:40]: Reading nand info
[14:24:40]: NAND_INFO: 0xbc4
[14:24:40]: Reading emmc info
[14:24:40]: EMMC_INFO: 0x0
[14:24:40]: ACK: 04029b
[14:24:40]: Setting stage 2 config ...
[14:24:42]: DRAM config needed for : 510001154236314e46710042dbb5d4c2
[14:24:42]: Reading dram nand info ...
[14:24:42]: Preloader needed due to dram config.`

[axiopaladin]

Dump your preloader first: https://youtu.be/NulWJo2RSKE?t=2726