When I followed the following steps, I encountered some problems。
4.3.3->4.3.6
I got the following prompt in Serial Assistant
U-Boot 2020.04-g44e422d-dirty (Jan 29 2021 - 18:26:13 +0800)
CPU: i.MX6SX rev1.2 996 MHz (running at 792 MHz)
CPU: Extended Commercial temperature grade (-20C to 105C) at 58C
Reset cause: POR
Model: NXP i.MX6 SoloX SDB RevB Board
Board: MX6SX SABRE SDB revD
DRAM: 1 GiB
PMIC: PFUZE100! DEV_ID=0x10 REV_ID=0x21
MMC: FSL_SDHC: 1, FSL_SDHC: 2, FSL_SDHC: 3
Loading Environment from MMC... *** Warning - bad CRC, using default environment
Display: Hannstar-XGA (1024x768)
Video: 1024x768x18
In: serial
Out: serial
Err: serial
switch to partitions #0, OK
mmc3 is current device
flash target is MMC:3
Net: Could not get PHY for FEC0: addr 1
Could not get PHY for FEC0: addr 1
No ethernet found.
Fastboot: Normal
Normal Boot
Hit any key to stop autoboot: 0
switch to partitions #0, OK
mmc3 is current device
** Unrecognized filesystem type **
** Unrecognized filesystem type **
Booting from net ...
Could not get PHY for FEC0: addr 1
Could not get PHY for FEC0: addr 1
Could not get PHY for FEC0: addr 1
Could not get PHY for FEC0: addr 1
Could not get PHY for FEC0: addr 1
No ethernet found.
Could not get PHY for FEC0: addr 1
Could not get PHY for FEC0: addr 1
Could not get PHY for FEC0: addr 1
Could not get PHY for FEC0: addr 1
Could not get PHY for FEC0: addr 1
Could not get PHY for FEC0: addr 1
No ethernet found.
Could not get PHY for FEC0: addr 1
zimage: Bad magic!
=>
The uboot image I flash is u-boot-imx6qpsabresd_sd.imx
The zImage_imx_v7_defconfig I flash is zImage.(because I don`t know where to find the zImage_imx_v7_defconfig )
The dtb I flash is imx6qp-sabresd.dtb
But I was wrong,I don`t know why.
