I flashed your LibreELEC-ARMv8.arm-9.80-devel-20201204143803-d174eba-odroid-c2.img.gz to emmc and tried to boot. It didn't work.
Serial log shows following
Code
BL2 Built : 11:44:26, Nov 25 2015.
gxb gfb13a3b-c2 - jcao@wonton
Board ID = 8
set vcck to 1100 mv
set vddee to 1050 mv
CPU clk: 1536MHz
DDR channel setting: DDR0 Rank0+1 same
DDR0: 2048MB(auto) @ 912MHz(2T)-13
DataBus test pass!
AddrBus test pass!
Load fip header from eMMC, src: 0x0000c200, des: 0x01400000, size: 0x000000b0
Load bl30 from eMMC, src: 0x00010200, des: 0x01000000, size: 0x00009ef0
Sending bl30........................................OK.
Run bl30...
Load bl301 from eMMC, src: 0x0001c200, des: 0x01000000, size: 0x000018c0
Wait bl30...Done
Sending bl301.......OK.
Run bl301...
m eMMC, src: 0x00020200, des: 0x10100000, size: 0x00011130
--- UART initialized after reboot ---
[Reset cause: unknown]
[Image: unknown, amlogic_v1.1.3046-00db630-dirty 2016-08-31 09:24:14 tao.zeng@droid04]
bl30: check_permit, count is 1
bl30: check_permit: ok!
chipidLoad bl33 from eMMC, src: 0x00034200, des: 0x01000000, size: 0x0009d320
: ef be ad de d f0 ad ba ef be ad de not ES chip
[0.293741 Inits done]
secure task start!
high task start!
low task start!
NOTICE: BL3-1: v1.0(debug):4d2e34d
NOTICE: BL3-1: Built : 17:08:35, Oct 29 2015
INFO: BL3-1: Initializing runtime services
INFO: BL3-1: Preparing for EL3 exit to normal world
INFO: BL3-1: Next image address = 0x1000000
INFO: BL3-1: Next image spsr = 0x3c9
U-Boot 2020.10 (Dec 04 2020 - 14:38:23 +0300) odroid-c2
Model: Hardkernel ODROID-C2
SoC: Amlogic Meson GXBB (S905) Revision 1f:c (0:1)
DRAM: 2 GiB
MMC: mmc@72000: 0, mmc@74000: 1
In: serial
Out: serial
Err: serial
Net: eth0: ethernet@c9410000
Hit any key to stop autoboot: 0
starting USB...
Bus usb@c9100000: USB DWC2
scanning bus usb@c9100000 for devices... 2 USB Device(s) found
scanning usb for storage devices... 0 Storage Device(s) found
Device 0: unknown device
Card did not respond to voltage select!
Card did not respond to voltage select!
MMC Device 2 not found
no mmc device at slot 2
Speed: 1000, full duplex
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
if I interrupt u-boot it shows u-boot:
BL2 Built : 11:44:26, Nov 25 2015.
gxb gfb13a3b-c2 - jcao@wonton
Board ID = 8
set vcck to 1100 mv
set vddee to 1050 mv
CPU clk: 1536MHz
DDR channel setting: DDR0 Rank0+1 same
DDR0: 2048MB(auto) @ 912MHz(2T)-13
DataBus test pass!
AddrBus test pass!
Load fip header from eMMC, src: 0x0000c200, des: 0x01400000, size: 0x000000b0
Load bl30 from eMMC, src: 0x00010200, des: 0x01000000, size: 0x00009ef0
Sending bl30........................................OK.
Run bl30...
Load bl301 from eMMC, src: 0x0001c200, des: 0x01000000, size: 0x000018c0
Wait bl30...Done
Sending bl301.......OK.
Run bl301...
31 from eMMC, src: 0x00020200, des: 0x10100000, size: 0x00011130
--- UART initialized after reboot ---
[Reset cause: unknown]
[Image: unknown, amlogic_v1.1.3046-00db630-dirty 2016-08-31 09:24:14 tao.zeng@droid04]
bl30: check_permit, count is 1
bl30: check_permit: ok!
chipidLoad bl33 from eMMC, src: 0x00034200, des: 0x01000000, size: 0x0009d320
: ef be ad de d f0 ad ba ef be ad de not ES chip
[0.293496 Inits done]
secure task start!
high task start!
low task start!
NOTICE: BL3-1: v1.0(debug):4d2e34d
NOTICE: BL3-1: Built : 17:08:35, Oct 29 2015
INFO: BL3-1: Initializing runtime services
INFO: BL3-1: Preparing for EL3 exit to normal world
INFO: BL3-1: Next image address = 0x1000000
INFO: BL3-1: Next image spsr = 0x3c9
U-Boot 2020.10 (Dec 04 2020 - 14:38:23 +0300) odroid-c2
Model: Hardkernel ODROID-C2
SoC: Amlogic Meson GXBB (S905) Revision 1f:c (0:1)
DRAM: 2 GiB
MMC: mmc@72000: 0, mmc@74000: 1
In: serial
Out: serial
Err: serial
Net: eth0: ethernet@c9410000
Hit any key to stop autoboot: 0
=> mmcinfo
Card did not respond to voltage select!
=> mmc dev 1
Card did not respond to voltage select!
=>
Display More
So it Seams that does not detect the emmc.
According to u-boot list the last working u-boot to boot from on Odroid-c2 is 2020.04. Is this the reason why it don't boot further?