LVGL 9.2 + esp32-s3 + display axs15321b

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6

I think you may need a rounder event callback when using PARTIAL refresh. Some display drivers require the update area to be aligned to even pixel boundaries

void rounder_event_cb(lv_event_t *e)
{
  lv_area_t *area = lv_event_get_invalidated_area(e);
  uint16_t x1 = area->x1;
  uint16_t x2 = area->x2;

  uint16_t y1 = area->y1;
  uint16_t y2 = area->y2;

  // round the start of coordinate down to the nearest 2M number
  area->x1 = (x1 >> 1) << 1;
  area->y1 = (y1 >> 1) << 1;
  // round the end of coordinate up to the nearest 2N+1 number
  area->x2 = ((x2 >> 1) << 1) + 1;
  area->y2 = ((y2 >> 1) << 1) + 1;
}

Add the callback to your display
lv_display_add_event_cb(lv_display, rounder_event_cb, LV_EVENT_INVALIDATE_AREA, NULL);