Do anyone know how to use the LCD headers to connecting the DIY LCD
panel?
How to drive the LCD headers?
Whether it is necessary to set something in u-boot?
You can do a search in the discussion group for a lot of history on this topic. But overall:
Design and adapter card that:
-converts the 1.8V signals on the connector to those required by the LCD
-Has an LCD compatible connector (different for each LCD)
-Has the LCD power supplies required (Including a back light)
-Has a touchscreen controller if you plan to use it
Or, there are a few available out there on the market if you look for them. They may or may not suit your needs as you have not said what size LCD is needed
It would require a change to your UBoot to initialize the card, a driver for the touchscreen and back light control, and you would need to set the LCD controller to the correct timings.
Gerald