Erasing the eMMC | Pinephone Pro

[Vermi]

After I got the Pinephone Pro I wiped the preinstalled AOSP Image according to PinePhone_Pro Wiki

and afterward tinkered with the Arch Image for some time.



Sometime later I noticed pacman showing me in when updating that I could update uboot:

Code:

dd if=/boot/idbloader.img of=/dev/mmcblkX seek=64 conv=notrunc,fsync
dd if=/boot/u-boot.itb of=/dev/mmcblkX seek=16384 conv=notrunc,fsync

and I thought updating uboot might help in someway. I unfortunately wrote the bootloader onto the eMMC(mmcblk2) and uboot wont boot my SD card and now I'm stuck.

I managed to see uboot trying to boot, but failing.



My question is, is there some otherway to wipe the eMMC or is there a way to get into the uboot cmdline to wipe it from there...so that I can boot again from the SD card



My uboot output is this:

Code:

U-Boot TPL 2021.10-3 (Dec 11 2021 - 19:16:00)
Channel 0: LPDDR4, 50MHz
BW=32 Col=10 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=2048MB
Channel 1: LPDDR4, 50MHz
BW=32 Col=10 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=2048MB
256B stride
lpddr4_set_rate: change freq to 400000000 mhz 0, 1
lpddr4_set_rate: change freq to 800000000 mhz 1, 0
Trying to boot from BOOTROM
Returning to boot ROM...

U-Boot SPL 2021.10-3 (Dec 11 2021 - 19:16:00 +0000)
Trying to boot from MMC1
Card did not respond to voltage select! : -110
spl: mmc init failed with error: -95
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###