How to use a VGA adapter

How to use a VGA adapter

[Cédric Cano]

Hello,

I'm using the UDK2015 release and I want to enable the Graphic Output on 
a PCI VGA adapter (PCI class code: 3, 0, 0). My VGA device doesn't 
provide any ROM.

In my FDF I've included the VgaMiniPortDxe and the VgaClassDxe. I 
haven't enabled the CSM layer.

When my board boots the screen doesn't display anything. The PCI device 
is enumerated (device found with pci command on the EFI shell).

Must I include another EFI driver to activate and/or initialize the VGA 
adapter or are these 2 drivers sufficient to enable the VGA display?
Can I use the VGA without the CSM layer?

Note: the display had already worked with a GOP driver on an AMD GPU. Is 
it possible to enable the GOP layer with the VGA layer?

Regards.

Cédric

Re: How to use a VGA adapter

[Richardson, Brian]

You need a device specific GOP driver for graphics in UEFI. 

Thanks … br
---
Brian Richardson, Senior Technical Marketing Engineer, Intel Software
brian.richardson@intel.com -- @intel_brian (Twitter & WeChat)
https://software.intel.com/en-us/meet-the-developers/evangelists/team/brian-richardson 

-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Cédric Cano
Sent: Thursday, July 13, 2017 12:23 PM
To: edk2-devel@lists.01.org
Subject: [edk2] How to use a VGA adapter

Hello,

I'm using the UDK2015 release and I want to enable the Graphic Output on a PCI VGA adapter (PCI class code: 3, 0, 0). My VGA device doesn't provide any ROM.

In my FDF I've included the VgaMiniPortDxe and the VgaClassDxe. I haven't enabled the CSM layer.

When my board boots the screen doesn't display anything. The PCI device is enumerated (device found with pci command on the EFI shell).

Must I include another EFI driver to activate and/or initialize the VGA adapter or are these 2 drivers sufficient to enable the VGA display?
Can I use the VGA without the CSM layer?

Note: the display had already worked with a GOP driver on an AMD GPU. Is it possible to enable the GOP layer with the VGA layer?

Regards.

Cédric

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