Fail to reset on Odroid-C4

[Jaehoon Chung]

Hi,

I have checked U-boot on Odroid-C4 with v2020.10.
I found a problem about reset behavior.

In my environment,
- Boot to SD-card,
- built u-boot v2020.10 with ordoid-c4_defconfig
- Referred to doc/board/amlogic/odroid-c4.rst


If do "reset" command after run command "mmcinfo", it didn't work anymore.
- After something to do operation relevant to MMC. (read/write or ls mmc, etc..)


U-Boot 2020.10-00383-g2f27fb20151b-dirty (Nov 06 2020 - 10:37:09 +0900) odroid-c4

Model: Hardkernel ODROID-C4
SoC:   Amlogic Meson SM1 (Unknown) Revision 2b:c (10:2)
DRAM:  3.8 GiB
MMC:   sd at ffe05000: 0, mmc at ffe07000: 1
In:    serial
Out:   serial
Err:   serial
Net:   eth0: ethernet at ff3f0000
Hit any key to stop autoboot:  0
Odroid N2>
Odroid N2>
Odroid N2>
Odroid N2>
Odroid N2>
Odroid N2> mmcinfo
Device: sd at ffe05000
Manufacturer ID: 3
OEM: 5344
Name: SB16G
Bus Speed: 50000000
Mode: SD High Speed (50MHz)
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 14.8 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes
Odroid N2> reset
resetting ...
bl31 reboot reason: 0xd
bl31 reboot reason: 0x0
system cmd  1.
SM1:BL:511f6b:81ca2f;FEAT:A0F83180:20282000;POC:F;RCY:0;EMMC:800;NAND:81;SD?:0;SD:0;READ:0;0.0;CHK:0;
bl2_stage_init 0x01
bl2_stage_init 0x81
hw id:?M1:BL:511f6b:81ca2f;FEAT:A0F83180:20282000;POC:F;RCY:0;EMMC:800;NAND:81;SD?:0;SD:800;USB:8;


I didn't analyze it in more detail. I will do. But it seems that relevant to BL2 binary.
If nothing to do before reset, it's working fine.

If someone already fixed this or I missed something to do, let me know, plz.

Best Regards,
Jaehoon Chung