Hello. 
I need to upgrade rga lib on rk 3588, and there is the the instruction how to do this in readme: 
 
https://github.com/airockchip/librga 
But I can find path where to insert upgraded files: 
可通过以下方式更新驱动: 同步SDK RGA multicore Device Driver 支持搭载RGA2/RGA3的芯片。 <kernel_path>/driver/video/rockchip/rga3 
 
I opened an issue for this: 
 
https://github.com/airockchip/librga/issues/47 
 
And the answer was that  
这个路径不在你的开发板上,而在开发板厂商提供的Linux SDK中。如果你没有这个SDK,你可以向开发板厂商索要或者去开发板的官网上找找。这是我的SDK中对应的路径,可以确认这个路径是存在的。 
 
So as I understand there is the SDK that orangepi should provide. 
Where can I dowload this SDK? 
 
 
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