Hi @Gencay
The ecosystem v4.0.0 published earlier in June is based on kirkstone branch and supports STM32MP15x devices.
You can refer to this announce here in the forum: https://community.st.com/s/question/0D53W00001dwKXQSA2/stm32mpu-ecosystem-release-v400-release-is-online-
Best regards,
--JM
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Edit: fix typo
