您好，tda4 evm custom板，16G的SamDisk sd卡，已经分区和安装好了uboot，
启动时出现如下问题：
LPDDR4_Start: PASS
Trying to boot from MMC2
Loading Environment from MMC... *** Warning - No MMC card found, using default environment
Starting ATF on ARM64 core...
NOTICE: BL31: v2.3():07.01.00.004-1-g52c334fc3-dirty
NOTICE: BL31: Built : 18:17:14, Nov 19 2020
U-Boot SPL 2020.01-dirty (Apr 16 2021 - 10:31:23 +0800)
SYSFW ABI: 3.1 (firmware rev 0x0014 '20.8.5--v2020.08b (Terrific Lla')
Reading on-board EEPROM at 0x50 failed -1
Trying to boot from MMC2
i2c_write: error waiting for data ACK (status=0x116)
Error reading output register
spl: mmc init failed with error: -110
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###
请问是什么问题，应该怎么解决。
