Porting LCD driver to uboot on imx8ulp

wangrucheng · ‎01-20-2024

I created a new post to explain the problem I am currently experiencing.

I used a screen with ST7701S as the controller. Currently, the kernel can display the image normally, but when I porting it to uboot, I found that the NXP logo could not be displayed normally.

What I can confirm is that there is no problem with the device tree and there is no problem with the screen initialization code.

The attachment contains uboot kernel code and panel spec.

Can you give me some advice？

Thanks

brian14 · ‎01-24-2024

Hi @wangrucheng,

Thank you for your reply with the information.

I have reviewed the driver; device tree and parameters and it seems that all is fine. You can try reading the MIPI PLL register and compare on Uboot stage and Kernel stage. Check whether is there any differences between this value and if it's overwriting the value.