[U-Boot] Booting MX6 via Serial Download after DM conversion

[Fabio Estevam]

Hi Peng,

On Mon, Apr 22, 2019 at 11:00 PM Peng Fan <peng.fan at nxp.com> wrote:

> Honestly I am not familiar with imx_usb, we use mfgtool previously and not uuu tool.
> Would you share where to download imx_usb and any doc,
> Then we will debug this issue.

You can get imx_usb_loader tool from
https://github.com/boundarydevices/imx_usb_loader

Install it, connect the board in USB download mode and then:

sudo ./imx_usb SPL
sudo ./imx_usb u-boot-dtb.img

I suggest you to try U-boot 2019.01 first, which works fine and then
2019.04, which is broken.

I could get imx usb loader to successfully load 2019.04 if I manually
change the defconfig like this:

--- a/configs/mx6sabresd_defconfig
+++ b/configs/mx6sabresd_defconfig
@@ -12,8 +12,6 @@ CONFIG_SPL_LIBDISK_SUPPORT=y
 CONFIG_NR_DRAM_BANKS=1
 # CONFIG_SYS_MALLOC_F is not set
 CONFIG_FIT=y
-CONFIG_SPL_FIT_PRINT=y
-CONFIG_SPL_LOAD_FIT=y
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/spl_sd.cfg"
 # CONFIG_CONSOLE_MUX is not set
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
@@ -21,7 +19,6 @@ CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE=y
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_BOUNCE_BUFFER=y
 CONFIG_SPL_SEPARATE_BSS=y
-CONFIG_SPL_FIT_IMAGE_TINY=y
 CONFIG_SPL_FS_EXT4=y
 CONFIG_SPL_I2C_SUPPORT=y
 CONFIG_SPL_OS_BOOT=y
@@ -56,15 +53,10 @@ CONFIG_CMD_FS_GENERIC=y
 CONFIG_EFI_PARTITION=y
 # CONFIG_SPL_EFI_PARTITION is not set
 CONFIG_OF_CONTROL=y
-CONFIG_SPL_OF_CONTROL=y
 CONFIG_DEFAULT_DEVICE_TREE="imx6q-sabresd"
 CONFIG_OF_LIST="imx6q-sabresd imx6qp-sabresd imx6dl-sabresd"
-CONFIG_MULTI_DTB_FIT=y
-CONFIG_SPL_MULTI_DTB_FIT=y
-CONFIG_SPL_OF_LIST="imx6dl-sabresd imx6q-sabresd imx6qp-sabresd"
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
-CONFIG_SPL_DM=y
 CONFIG_USB_FUNCTION_FASTBOOT=y
 CONFIG_FASTBOOT_BUF_ADDR=0x12000000
 CONFIG_FASTBOOT_BUF_SIZE=0x10000000
@@ -95,6 +87,4 @@ CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
 CONFIG_CI_UDC=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_ASIX=y
-CONFIG_DM_VIDEO=y
-CONFIG_VIDEO_IPUV3=y
 # CONFIG_VIDEO_SW_CURSOR is not set