Use the procedure documented below to install the U-Boot firmware, Linux kernel and filesystem images to the eMMC on the STM32MP1 module. Having completed the installation, the STM32MP1 SOM will boot to Linux from the eMMC on next reset / power on.

Note that the procedure will erase all data previously present on the eMMC.

Here is the installation procedure:

1. Follow the instructions in the Section 5 of https://wiki.st.com/stm32mpu/wiki/STM32MP15_Discovery_kits_-_Starter_Package#Installing_the_STM32CubeProgrammer_tool to install the STM32CubeProgrammer Tool to your host.
2. Add STM32_Programmer_CLI to your PATH:

$ export PATH=$PATH:/bin:
$ STM32_Programmer_CLI
[psl@sergmir programmer]$ STM32_Programmer_CLI 
      -------------------------------------------------------------------
                        STM32CubeProgrammer v2.7.0                  
      -------------------------------------------------------------------

Usage : 
STM32_Programmer_CLI.exe [command_1] [Arguments_1][[command_2] 
[Arguments_2]...] 
...

3. Power off the board and select the USB Serial Downloader mode (see in Selecting Boot Device).
4. Attach the miniUSB cable to connector P5 and to the Linux host.
5. Power on the board, attaching another miniUSB cable to P3.
6. Check that the programming USB port appeared on the host (note the "Device Index" in the output):

      -------------------------------------------------------------------
                        STM32CubeProgrammer v2.7.0                  
      -------------------------------------------------------------------

=====  DFU Interface   =====

Total number of available STM32 device in DFU mode: 1

  Device Index           : USB1
  USB Bus Number         : 001
  USB Address Number     : 004
  Product ID             : DFU in HS Mode @Device ID /0x500, @Revision ID 
/0x0000
  Serial number          : 003000193338511534383330
  Firmware version       : 0x0110
  Device ID              : 0x0500

7. Download the Emcraft release images from Emcraft site and unpack them into the arbitrary directory. (If you are installing the images built by Yocto, navigate to builddir/tmp-glibc/deploy/images/stm32mp1-som directory):

$ ls -l
total 203344
-rw-rw-r-- 1 psl psl 208217109 Apr 27 13:52 images-stm32mp1-3.0.0.tar.bz2
$ tar xfj images-stm32mp1-3.0.0.tar.bz2 
$ ls -l
total 961696
drwxr-xr-x 3 psl psl      4096 Apr 16 21:53 arm-trusted-firmware
drwxr-xr-x 2 psl psl      4096 Apr 16 20:55 bootloader
-rw-r--r-- 1 psl psl 558419968 Apr 20 20:59 emcraft-rootfs-openstlinux-
weston-stm32mp1-som.ext4
drwxrwxr-x 4 psl psl      4096 Apr 27 14:49 flashlayout_emcraft-rootfs
-rw-rw-r-- 1 psl psl 208217109 Apr 27 13:52 images-stm32mp1-3.0.0.tar.bz2
drwxr-xr-x 2 psl psl      4096 Mar  8 20:46 scripts
-rw-r--r-- 1 psl psl  67108864 Apr 20 20:57 st-image-bootfs-openstlinux-
weston-stm32mp1-som.ext4
-rw-r--r-- 1 psl psl 134217728 Apr 20 18:31 st-image-userfs-openstlinux-
weston-stm32mp1-som.ext4
-rw-r--r-- 1 psl psl  16777216 Apr 20 18:31 st-image-vendorfs-openstlinux-
weston-stm32mp1-som.ext4
$

8. Run the following command to install the images to eMMC:

$ STM32_Programmer_CLI -c port=usb1 -w flashlayout_emcraft-rootfs
/trusted/FlashLayout_emmc_stm32mp1-som-trusted.tsv
      -------------------------------------------------------------------
                        STM32CubeProgrammer v2.7.0                  
      -------------------------------------------------------------------

USB speed   : High Speed (480MBit/s)
Manuf. ID   : STMicroelectronics
Product ID  : DFU in HS Mode @Device ID /0x500, @Revision ID /0x0000
SN          : 003000193338511534383330
FW version  : 0x0110
Device ID   : 0x0500
Device name : STM32MP1
Device type : MPU
Device CPU  : Cortex-A7

Start Embedded Flashing service

Memory Programming ...
Opening and parsing file: tf-a-stm32mp1-som-serialboot.stm32
  File          : tf-a-stm32mp1-som-serialboot.stm32
  Size          : 237896 Bytes
  Partition ID  : 0x01 

Download in Progress:
[==================================================] 100% 

File download complete
Time elapsed during download operation: 00:00:00.452

RUNNING Program ... 
  PartID:      :0x01 
Start operation done successfully at partition 0x01

Flashlayout Programming ...
[==================================================] 100% 
Running Flashlayout Partition ...
Flashlayout partition started successfully
...
Download in Progress:
[==================================================] 100% 

File download complete
Time elapsed during download operation: 00:00:39.074

RUNNING Program ... 
  PartID:      :0x24 
Start operation done successfully at partition 0x24
Flashing service completed successfully
$ 

9. Disconnect the cables from P5 and P3.
10. Select the eMMC as the boot device (see in Selecting Boot Device).
11. Connect miniUBS to P3, this powers the board on.
12. Connect to the serial console (see Setting Up the STM32MP1 SOM Starter Kit and see the system booting:

NOTICE:  CPU: STM32MP157AAA Rev.B
NOTICE:  Model: Emcraft STM32MP157 SOM rev 1A, https://emcraft.com
INFO:    Reset reason (0x15):
INFO:      Power-on Reset (rst_por)
INFO:    Using EMMC
INFO:      Instance 2
INFO:    Boot used partition fsbl1
NOTICE:  BL2: v2.2-r2.0(debug):v2.2-stm32mp-r2-2-g7aca41fc2
NOTICE:  BL2: Built : 18:25:18, Mar 31 2021
INFO:    Using crypto library 'stm32_crypto_lib'
INFO:    BL2: Doing platform setup
INFO:    RAM: DDR3-DDR3L 32bits 533000Khz
INFO:    Memory size = 0x40000000 (1024 MB)
...
ST OpenSTLinux - Weston - (A Yocto Project Based Distro) 3.1-
snapshot stm32mp1-som ttySTM0

stm32mp1-som login: root (automatic login)

Last login: Fri Feb  7 15:51:09 UTC 2020 on tty7
root@stm32mp1-som:~#