Of all the gin joints in all the towns in all the world, Alireza Banejad had
to walk into mine at 02:22:32 on Tuesday, 7 February 2023 and say:
> Do not click links or open attachments unless you recognize the sender and
> know the content is safe. Hello everyone,
> I am trying to use the GOP library for my uefi development. But no matter
> what code whenever i want to open the GOP handle RETURN_UNSUPPORTED is
> returned. I think this may be a qemu problem as if it doesn't support the
> GOP at all. This is how I run my qemu
>
> qemu-system-x86_64 -bios $FIRMWARE -hda fat:rw:$DRIVE -global
> isa-debugcon.iobase=0x402 -net none -debugcon file:debug2.log -machine
> pc-q35-6.2 -device virtio-gpu
>
> Should I add any specific options for the qemu command or should I just use
> another lib for GOP on qemu?
One question: when you launch QEMU, do you actually see a graphics window pop
up with the Tianocore logo? If you press F2 as it launches, are you able to
enter the setup menu?
I'm trying to understand if QEMU/OVMF's graphics display is working all all.
If it is, then in theory the GOP support should work.
If I may suggest, omit the -device virtio-gpu option. In my experience, the
OVMF firmware for Intel works with the QEMU built-in emulated VGA display
device. With the code I've written in the past, calling BS->LocateProtocol()
with the GOP GUID returns a valid handle. Once you have that, you should be
able to use the GOP methods, e.g. GOP->Blt().
-Bill
--
=============================================================================
-Bill Paul (510) 749-2329 | VxWorks Software Architect,
wp...@windriver.com | Master of Unix-Fu - Wind River Systems
=============================================================================
"I put a dollar in a change machine. Nothing changed." - George Carlin
=============================================================================
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