SS928V100用串口烧录正常，用网口烧录不正常。网口烧录出厂固件正常。

好的，我试了用20230529-spi-nand中的uboot和我自己编译的image和rootfs用网口是可以正常升级的，非常感谢。

03.EB-SS928-DC-393型开发板软件资料\02.例程包\u-boot-2020.01\u-boot-2020.01目录与
~/ss928v100_sdk/SS928V100_SDK_V2.0.2.1/open_source/u-boot/u-boot-2020.01目录对比差异文件比较多，请问能否指教下具体的位置？

对比修改后的UBOOT和内核发现有以下改动:
①.修改了GMAC数量
include/configs/ss928v100.h

define CONFIG_GMAC_NUMS 2

define CONFIG_GMAC_PHY1_ADDR 1

②.内核配置项多了CONFIG_MII=y，以及CONFIG_USB_DRD0_IN_HOST=y

③.增加Flash下EMMC支持以及mdio1地址
arch/arm64/boot/dts/vendor/ss928v100-demb-flash.dts
&mmc0 {
bus-width = <4>;
status = “okay”;
};

arch/arm64/boot/dts/vendor/ss928v100-demb.dts
&mdio1 {
ethphy1: ethernet-phy@1 {
reg = <1>;
};
}

对比uboot发现u-boot-2020.01\drivers\net\gmacv300\gmac.c有修改

/ PHY-RTL8211F by-3 /
if (phy_id == PHY_ID_RTL8211FS) {
unsigned int val = 0;
miiphy_write(devname, phyaddr, 0x1F, 0xD08);
miiphy_read(devname, phyaddr,17,&val);
val |= bit(8);
miiphy_write(devname, phyaddr,17,val);
miiphy_write(devname, phyaddr, 0x1F, 0); //set to page 0
}

内核修改

linux-4.19.y\drivers\net\ethernet\vendor\gmac\gmac.h
linux-4.19.y\drivers\net\ethernet\vendor\gmac\util.c
static int rtl8211fs_phy_fix(struct phy_device *phy_dev)
{
u32 v;
// RX or TX delay
phy_write(phy_dev, 0x1F, 0xd08);
v = phy_read(phy_dev, 17);
v |= (1<<8);
phy_write(phy_dev, 17, v);

// change back to page0 
phy_write(phy_dev, 0x1F, 0);
return 0;

}

void gmac_phy_register_fixups(void)
{
phy_register_fixup_for_uid(PHY_ID_UNKNOWN, DEFAULT_PHY_MASK,
unknown_phy_fix);
phy_register_fixup_for_uid(PHY_ID_KSZ8051MNL, DEFAULT_PHY_MASK,
ksz8051mnl_phy_fix);
phy_register_fixup_for_uid(PHY_ID_KSZ8081RNB, DEFAULT_PHY_MASK,
ksz8081rnb_phy_fix);
phy_register_fixup_for_uid(REALTEK_PHY_ID_8211E, REALTEK_PHY_MASK,
rtl8211e_phy_fix);
phy_register_fixup_for_uid(REALTEK_PHY_ID_8211FS, REALTEK_PHY_MASK,
rtl8211fs_phy_fix);

}

void gmac_phy_unregister_fixups(void)
{
phy_unregister_fixup_for_uid(PHY_ID_UNKNOWN, DEFAULT_PHY_MASK);
phy_unregister_fixup_for_uid(PHY_ID_KSZ8051MNL, DEFAULT_PHY_MASK);
phy_unregister_fixup_for_uid(PHY_ID_KSZ8081RNB, DEFAULT_PHY_MASK);
phy_unregister_fixup_for_uid(REALTEK_PHY_ID_8211E, REALTEK_PHY_MASK);
phy_unregister_fixup_for_uid(REALTEK_PHY_ID_8211FS, REALTEK_PHY_MASK);
}

uboot按照如上修改之后可以通过网口升级，非常感谢。