Release Notes 4.1.0


This is the Linux BSP (Board Support Package) and the development environment for the STM32MP1 System-On-Module (SOM) and Starter Kit, release 4.1.0.

The BSP provides a software development environment for evaluation and development of Linux (uClinux) on the Cortex-A7 processor core of the STM32MP1 microcontroller (the 650MHz STM32MP157A and 800MHz STM32MP157D variants) using the Emcraft STM32MP1 SOM Starter Kit as a hardware platform.

Supported Features

The following list provides a summary of the features and capabilities of this release of the STM32MP1 BSP:

  • Linux:

    • Kernel v.6.1.28;

    • Serial Linux console;

    • Ethernet device driver and Linux TCP/IP networking (ping, NFS, Telnet, FTP, NTPD, etc);

    • eMMC/SD device driver;

    • USB host/gadget device driver;

    • LCD device driver;

    • Touchscreen device driver;

    • Clock driver;

    • pinctrl driver;

    • busybox v1.36.0;

    • POSIX pthreads;

    • Hardened exception handling; an exception triggered by a process affects only the offending process.

  • U-Boot firmware:

    • U-Boot v 2022.10;

    • Serial console command interface with various setup, test and maintenance commands;

    • Environment variables allowing customisation of a unit;

    • Sophisticated OS auto-boot sequence;

    • Partitioning and management of external Flash;

    • Initial installation of Linux image to external Flash.

  • Development environment:

    • Linux-hosted cross-development environment;

    • Yocto v4.2.1 distribution.

New and Changed Features

This section lists new and changed features of this release:

  1. Support STM32MP1-BSB in Emcraft BSP and distribution.
    ID: STM32MP1-6.

  2. Fix issue: Boot from SD does not work with STM32MP1-BSB Rev 2A.
    ID: STM32MP1-12.

  3. Fix issue: Some SD cards do not work with STM32MP1-BSB.
    ID: STM32MP1-26.

  4. Fix issue: 5V should not be applied to USB OTG by default.
    ID: STM32MP1-29.

  5. Support MIPI DSI with STM32MP1-BSB.
    ID: STM32MP1-22.

  6. Support DCMI camera (Waveshare OV5640 A) with STM32MP1-BSB.
    ID: STM32MP1-23.

  7. Add support for the TPM Click card to Linux BSP.
    ID: STM32MP1-8.

Known Problems and Limitations

This section lists known problems and limitations of this release:

  1. Ethernet does not work if the cable is not attached during boot.
    ID: STM32MP1-14.

  2. Cannot modify Flash on SPI Flash dongle.
    ID: STM32MP1-17.

  3. Touchscreen does not work with STM32MP1-BSB.
    ID: STM32MP1-18.

  4. The STM32MP1-SOM is reset after waking up from the low power mode.
    ID: STM32MP1-24.

  5. USB Mouse and USB keyboard does not work in USB-A.
    ID: STM32MP1-30.

  6. Support resolutions other than 320*240 / 15 fps for DCMI camera.
    ID: STM32MP1-32.

  7. Managing U-Boot environment from Linux is not supported.
    ID: STM32MP1-34.

Further Reading

  • Hardware Materials:

Refer to the following page for various documentation and hardware files describing the STM32MP1 SOM and Starter Kit:

  • Documentation Items:

Refer to the following page for various documentation items describing use of the STM32MP1 SOM and Starter Kit: .


Customers of the Emcraft i.MX 8M Starter Kit may contact Emcraft at for support.