nt9856x/BSP/linux-kernel/drivers/soc/nvt/nvt_hdal
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..
hdal
Kconfig
Makefile
README
vos

/**
    HDAL built-in readme
    Copyright   Novatek Microelectronics Corp. 2019.  All rights reserved.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License version 2 as
    published by the Free Software Foundation.
*/

The HDAL source code is put in the path: sdk/code/hdal.
Our default setting is the kernel module, you can select which module wants to build as built-in to accelerate boot speed.