How to start HDMI from U-boot in STM32MP2

Forum|Forum|1 month ago
August 6, 2026
9 replies
116 views

Is it possible to start the HDMI from U-boot in STM32MP2?

I want to see the start up log.

Best answer by Erwan SZYMANSKI

Hi @Windows,
I think this is not an issue of DSI / LTDC because they are already supported properly in U-Boot (this is the reason why splash screen on DSI works).

This is the DSI to HDMI bridge driver that need a driver support in U-Boot. For example, on STM32MP257F-DK board, we embed the ADV7533 bridge, and you can see the driver sources in Linux source code (adv7533.c). However, the bridge driver is not present in U-Boot, we only use the compatible to make a simple detection, but I think we do not configure the internal register of the bridge.

Kind regards,
Erwan.

Erwan SZYMANSKI

ST Technical Moderator

Hello @Windows,
What do you mean by “I want to see the startup logs” ? You mean you want to display startup logs on your HDMI connected screen ?

Kind regards,
Erwan.

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.

W

WindowsAuthor

Senior

@Erwan SZYMANSKI

Yes! Like a splash screen and the Linux console boot up. Like regular Linux. You know ?

Erwan SZYMANSKI

ST Technical Moderator

Hello @Windows ,
As mentioned in this article: How to display on HDMI - stm32mpu, U-Boot does not support HDMI display, but only DSI or LVDS one. This is the reason why you do not see the splash at U-Boot state; drivers are not here to support.

Kind regards,
Erwan.

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.

W

WindowsAuthor

Senior

Hi @Erwan SZYMANSKI

By the way. U-boot for NXP supports ADV7535 driver in U-boot:

https://github.com/nxp-imx/uboot-imx/blob/lf_v2026.04/drivers%2Fvideo%2Fadv7535.c

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