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Re: [Qemu-devel] vga-pci and MMIO BAR


From: Gerd Hoffmann
Subject: Re: [Qemu-devel] vga-pci and MMIO BAR
Date: Mon, 06 Aug 2012 14:03:59 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.5) Gecko/20120601 Thunderbird/10.0.5

On 07/25/12 05:57, Benjamin Herrenschmidt wrote:
> Hi folks !
> 
> Would there be any objection to adding a second MMIO BAR to qemu-vga
> which mirrors the bochs magic VBE ports ?

No.

> Once done, I'd like to look into doing a qemudrmfb similar to the cirrus
> one that pretty much gives you generic KMS support (with RandR) on top
> of vga-pci. This would have the advantage of potentially lifting the
> pitch and size limitations that plague cirrus.

Hacked up something like that a while back (patch attached).  Doesn't
use DRM though, just plain old fbdev.  Maybe you can reuse some bits
nevertheless.

/me wonders what the advantage of using drm is for non-3D hardware?

cheers,
  Gerd

Attachment: 0001-add-bochs-dispi-interface-framebuffer-driver.patch
Description: Text document


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