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From: "Paul, Bill" <Bill.Paul@windriver.com>
To: "devel@edk2.groups.io" <devel@edk2.groups.io>,
"devel@edk2.groups.io"
<devel@edk2.groups.io>,
"alibanejad1376@gmail.com" <alibanejad1376@gmail.com>
Subject: Re: [edk2-devel] Graphic Output on qemu
Thread-Topic: [edk2-devel] Graphic Output on qemu
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Date: Tue, 7 Feb 2023 19:55:25 +0000
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Of all the gin joints in all the towns in all the world, Alireza Banejad ha=
d=20
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 an=
d
> 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
>=20
> qemu-system-x86_64 -bios $FIRMWARE -hda fat:rw:$DRIVE -global
> isa-debugcon.iobase=3D0x402 -net none -debugcon file:debug2.log -machin=
e
> pc-q35-6.2 -device virtio-gpu
>=20
> Should I add any specific options for the qemu command or should I just u=
se
> another lib for GOP on qemu?
One question: when you launch QEMU, do you actually see a graphics window p=
op=20
up with the Tianocore logo? If you press F2 as it launches, are you able to=
=20
enter the setup menu?
I'm trying to understand if QEMU/OVMF's graphics display is working all all=
.=20
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=
=20
OVMF firmware for Intel works with the QEMU built-in emulated VGA display=20
device. With the code I've written in the past, calling BS->LocateProtocol(=
)=20
with the GOP GUID returns a valid handle. Once you have that, you should be=
=20
able to use the GOP methods, e.g. GOP->Blt().
-Bill
--=20
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=3D=3D
-Bill Paul (510) 749-2329 | VxWorks Software Architect,
wpaul@windriver.com | Master of Unix-Fu - Wind River Syste=
ms
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"I put a dollar in a change machine. Nothing changed." - George Carlin
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