Display different application on HDMI and DSI at the same time

[ALand.1]

Hi,

I am building openstlinux-weston/st-image-weston image for stm32mp157c-dk2 board, and I have developed 2 application to be displayed at the same time. I configured DSI and HDMI with Buildroot, for the last one I followed this wiki: https://wiki.st.com/stm32mpu/wiki/How_to_display_on_HDMI, but I would like to know if there is a way to display 2 different application on the 2 interfaces at the same time.

Regards.

Aitor.

[PatrickF]

Hi,

The STM32MP15x have a single display pipe (the LTDC) which could feed pixels to either pins (for parallel RGB LCD or HDMI converter) or internally to the DSI interface.

There is no way to have two images (same or different) on those two interfaces.

If you want a second display, you could have a look to use other serial interface (SPI, I2C) or parallel (FMC, exclusive to SLC NAND usage and not yet supported in SW deliveries). But for sure, resolution and refresh rate would need to be reduced.

Regards.

[ALand.1]

Thanks a lot.