AM4376 不能正常启动，就打印了一次信息，之后就不打印了；哪位大神遇见过吗？

SD卡启动打印信息如下：

U-Boot SPL 2013.10 (Aug 14 2017 - 02:17:20)
SPL: Please implement spl_start_uboot() for your board
SPL: Direct Linux boot not active!
reading u-boot.img
reading u-boot.img


U-Boot 2013.10 (Aug 14 2017 - 02:17:20)

I2C:   ready
DRAM:  1 GiB
lcd_bl_init
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
Using default environment

Init vbus0: 500mA@5V, OFF
Init vbus1: 500mA@5V, ON
Not found the LCD header IC
Net:   <ethaddr> not set. Validating first E-fuse MAC
Could not get PHY for cpsw: addr 0
cpsw
Hit any key to stop autoboot:  0
Card did not respond to voltage select!
mmc0(part 0) is current device
Scanning mmc 0...
Card did not respond to voltage select!
** Bad device mmc 0 **
Card did not respond to voltage select!
mmc0(part 0) is current device
Card did not respond to voltage select!
** Bad device mmc 0 **
## Error: "bootcmd_qspi" not defined
(Re)start USB...
USB0:   Register 2000440 NbrPorts 2
Starting the controller
USB XHCI 1.00
scanning bus 0 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found

USB device 0: unknown device
U-Boot#