How can I use Stm32mp157c-dk2 with 7inch HDMI LCD(B)

[Uusta.1]

Hi, I want to use my stm32mp157c-dk2 board with capacitive touchscreen display(7inch HDMI LCD (B)), image that I installed for stm32mp1 board is Distribution Package st-example-image-qt (DISTRO=openstlinux-eglfs MACHINE=stm32mp1-disco source layers/meta-st/scripts/envsetup.sh)

7inch HDMI LCD(B)

I think I need to modify device tree and kernel configuration but I dont know which drivers do I need, could you help me?

[PatrickF]

Hi,

For display, did you tried with out of the box DK2 Starter Package ?

More info on https://wiki.st.com/stm32mpu/wiki/How_to_display_on_HDMI

For touch, as it is using usb, likely some driver should be added if default HID driver are not enough (DK2 with started package already work with many usb peripherals such as mouse, keyboard, webcam, etc...).

Regards.

[Uusta.1]

Update: power supply for my stm32mp157c-dk2 board was not enough, after I changed my power suppy, my hdmi screen is working

[PatrickF]

Hi,

nice to see you succeeded to get your HDMI display working.

Notice that the 5V output on HDMI connector is limited by a polyswitch fuse and should be limited to somewhat 200mA.

For USB Type-A, the limitaition is 500mA.

I'm not sure your display is powered thru USB and/or HMDI, but ensure not using more power in case back-light is at maximum.

Regard

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