STM32MP257F-DK HDMI output to 9.3" waveshare display at native res

[Jled]

Hi there I have a STM32MP257f-DK board running the latest Linux, and I’m trying to output to a waveshare 9.3” HDMI display at its native resolution. 1600x600

I can output to it at 1920x1080. and I can output to the display from my Mac at it’s native 1600x600.

 

I see a slight flicker when I try send video then black. then the display goes to sleep. So the display is losing sync.

linux reports the output is working, but it seems it’s something to do with the ADZ7xx chip.

any ideas?

[Erwan SZYMANSKI]

Hello ​@Jled ,
If I remember well, the HDMI resolution is a negotiation between the best resolution possible on both sides (capability of MP2 and the monitor). Maybe this wiki page can help you to go forward: https://wiki.st.com/stm32mpu/wiki/How_to_display_on_HDMI

1600x600 does not feel like a standard resolution, but need to double check with the help of this wiki page.

Kind regards,
Erwan.

[Jled]

Hello ​@Jled ,
If I remember well, the HDMI resolution is a negotiation between the best resolution possible on both sides (capability of MP2 and the monitor). Maybe this wiki page can help you to go forward: https://wiki.st.com/stm32mpu/wiki/How_to_display_on_HDMI

1600x600 does not feel like a standard resolution, but need to double check with the help of this wiki page.

Kind regards,
Erwan.

Thanks for the reply Erwan. I have read that page before. I’ll look over it again. Yes 1600x600 is not standard, but it can be done on other devices so HDMI should be able to handshake on that res.