Query Regarding HX8394-F TFT Driver IC Initialization

[Shivani_Elavena]

Dear NXP Community Team,

We are currently using the STM32H747 microcontroller with the RK055MHD091A0-CTG MIPI DSI display panel. The TFT driver IC used in this display is HX8394-F.

We would like to understand whether it is mandatory to initialize the HX8394-F TFT driver IC separately through MIPI DSI commands during display startup, even after configuring the LTDC and DSI peripherals of the STM32H747.

We observed in the NXP SDK examples that the HX8394 initialization sequence sends multiple DCS/generic write commands to configure the panel before enabling the display.

Could you please confirm:

1. Whether the HX8394-F requires a dedicated initialization sequence after power-up/reset.
2. Whether there is any recommended initialization sequence or documentation available for the RK055MHD091A0-CTG display panel.

Thank you for your support.

Best Regards,
Siddum.

[Gavin_Jia]

Hi @Shivani_Elavena ,

Thank you for contacting the NXP Technical Support Team!

First, we recommend using an NXP RT series MCU as the main controller, as this will allow us to provide more support. Next, regarding the display panel issue you mentioned, you can check the RT MCU SDK, and we recommend reviewing this driver: https://github.com/nxp-imx/uboot-imx/blob/lf_v2025.04/drivers/video/rocktech-hx8394f.c

- hx8394f_panel_enable_backlight

- hx8394f_init_sequence

Wish you a nice day!

Best regards,
Gavin