GOP Console Driver

[Jd Lyons <lyons_dj@yahoo.com>]

> Begin forwarded message:
> 
> From: Jd Lyons <lyons_dj@yahoo.com>
> Subject: GOP Console Driver
> Date: August 18, 2018 at 11:31:50 PM EDT
> To: edk2-devel@lists.01.org
> 
> I’ve been trying to hack together GOP support for Apples EFI 1.1 on my Mac Pro3,1. Apple uses a somewhat mix of EFI 1.x and UEFi2.x.
> 
> I’m able to get the GOP rom for my graphics card to load and link to the device, Apple’s firmware takes care of that much, and I have some custom code for rEFInd boot loader that makes the graphics card work in graphics mode. However I can’t get back to a shell nor can I boot Windows or the Mac OS in this mode.
> 
> I think the trouble with booting the macOS is Apple’s boot.efi can’t get the console, Apple has a UGA Console driver but no GOP Console driver in my firmware. I tried extracting the Graphics Console Driver from OVMF and it does load, but doesn’t link to any devices, even when I try to connect it with my device handle, I.E.
> 
> connect DA 129
> 
> Returns success, but invoking drivers shows the Graphics Console Driver is still not linked to any devices.
> 
> Can anyone point me in the right direction on how to get a proper GOP Console Driver?
> 
> Thanks,
> JD