Struggling to connect SPI display

General
1

Hi team,

I am using following mentioned spi display with axon. Please help to figure out the mapping of its pin with axon gpios.

I tried the debugging but not able to resolve it.

Display link: https://robu.in/product/smartelex-1-69-inch-tft-lcd-display/?gad_source=1&gad_campaignid=18585959909&gbraid=0AAAAADvLFWdUSGZ5gcYlUpEbuQLgz3yev&gclid=CjwKCAjw-dfOBhAjEiwAq0RwIz6X-RR4zdeZ9EggCYHJ7l05uouwjs--8cT0Yxm3sL8ttcF5WUckPhoCkWMQAvD_BwE

2

Here. you can find documentation of using GPIO as SPI.

3

@Avi_Shihora I followed the same doc. Backlight is on but nothing rendering on display. Tried to change configs but still not working.

4

Since, it is rkchip. Do we know what lib to use for spi display? @Avi_Shihora

5

What are the configs and dtbo/dtb you have added/modified in kernel !?

I found that you may require driver SR7789V.

The SmartElex 1.69-inch TFT LCD module (240x280 resolution) uses the ST7789V3 (or ST7789V2) driver IC and supports a 4-wire SPI interface.

Driver & Library Support

  • Driver IC: ST7789V / ST7789V3.

So, You have to add support of TFT LCD Driver ST7789V CONFIG_FB_TFT=y and CONFIG_FB_TFT_ST7789V=y in kernel.

For that you required to build kernel and apply in axon.

7

Kernel will require support for every display to run, to add support you can clone the repo, GitHub - vicharak-in/vicharak-linux-kernel: Linux Kernel Source for Vicharak's Vaaman ( RK3399 based ) and Axon ( RK3588 based ) Boards · GitHub follow the guide provided by @Avi_Shihora

8
9

Definitely, we can do that. But what about patching and updates of kernel?
We have to manually fetch and configure it all the time.

I would suggest to make these changes in kernel master/6.1 repo so that others can also leverage it.

@djkabutar

10

I have given updated in Kernel.
you can apply it by running below command.

sudo apt update
sudo apt upgrade

Then restart the system.

sudo reboot
11

One way is using below guide as well.

Follow this ST7789 github repository.