LCD Setting

2026-04-17 8:45

Good morning everyone,
I recently purchased three RK3506 Luckfox Lyra Ultra W boards and two Whaveshare 3.4/4-inch DSI Round Capacitive Touch Display panels, 800 × 800 / 720 × 720 Resolution, IPS display panel, 10-Point Touch.
Can anyone explain the steps to get these panels working?
I loaded the official Luckfox_Lyra_SDK_250815 build and configured the device via luckfox-config, setting:
MIPI DSI -> MIPI DSI-MODE -> RPI Compatible DSI -> 7) 4inch-dsi-lcd-c
But the display still remains black.
Can you help me?
Thanks

2026-04-24 10:43

The DSI configuration takes effect after a reboot. You can use modetest to check whether the configuration has been applied successfully. It is also recommended to use evtest to verify that the touch function is working properly, in order to rule out connection issues. Additionally, please confirm the specific model of the screen being used, as we have recently introduced different driver board versions (DSI-TOUCH series).

2026-05-02 14:20

Crocodile wrote: ↑2026-04-24 10:43 The DSI configuration takes effect after a reboot. You can use modetest to check whether the configuration has been applied successfully. It is also recommended to use evtest to verify that the touch function is working properly, in order to rule out connection issues. Additionally, please confirm the specific model of the screen being used, as we have recently introduced different driver board versions (DSI-TOUCH series).

Reboot applied the config, but the display is still inconsistent. I’ll check with modetest and evtest—could this be related to the newer DSI-TOUCH board versions or specific panel compatibility?

2026-05-06 3:52

On older versions, the initialization sequence was written directly on the display's control board, so the Luckfox Lyra only needed proper timing configurations to work. In contrast, the DSI-TOUCH series adheres to the standard where the initialization sequence is provided by the host (Luckfox Lyra). If you are using a DSI-TOUCH series display, you will need to modify the device tree as described in the attached document. The luckfox-config tool does not yet support this (an iterative update is expected to be completed within this month).