LVGL + LovyanGFX: getTouch() works, but read_cb not called

[kmaehara0704]

Hi, I'm using ESP32-WROOM-32E with a 3.5" ST7796 SPI LCD and XPT2046 touch controller.

I'm combining LovyanGFX and LVGL v8 for display and UI.

`tft.getTouch()` works in standalone test
`my_touchpad_read()` is not called under LVGL


I confirmed:
- `lv_timer_handler()` is running (loop tick prints)
- `flush_cb` is working (screen updates correctly)
- Input device was registered successfully (`Input device registered OK` printed)

I don't use the touch IRQ pin — polling only.

Any idea what could prevent LVGL from calling the input driver?

Here is the GitHub repo with full code:
https://github.com/KenjiMaehara/ESP32_T ... #L103-L122



Thanks in advance for your help!