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Date: Mon, 22 Jun 2009 08:37:08 +0200
From: Thierry Reding <thierry.reding@avionic-design.de>
Subject: Re: [Qemu-devel] PXA2xx LCD vs. dedicated framebuffer
Message-ID: <20090622063708.GA18443@avionic-design.de>
References: <20090619100412.GA5683@avionic-design.de>
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To: Filip Navara <filip.navara@gmail.com>
Cc: qemu-devel@nongnu.org

* Filip Navara wrote:
> On Fri, Jun 19, 2009 at 12:04 PM, Thierry Reding <
> thierry.reding@avionic-design.de> wrote:
> 
> > I'm working on adding support to QEMU for some of the boards that the
> > company
> > I work for develops. The boards have a PXA270 and an FPGA to implement
> > additional functionality, such as a dedicated graphics controller. The
> > problem I'm facing now is that whenever the dedicated graphics controller
> > is
> > initialized in QEMU it registers as a secondary DisplayState because the
> > PXA2xx LCD is already present.
> >
> > Is there a way to make QEMU ignore the PXA2xx LCD or prefer the dedicated
> > controller as primary DisplayState? The only way I could find was to
> > comment
> > out the PXA2xx LCD initialization or patch the sources to disable the LCD
> > using a flag during PXA2xx setup.
> >
> > Thierry
> 
> 
> As far as I know there's currently no way to achieve it except for
> commenting out the code or changing the order of initialization. Note that
> once the "devtree" patch is merged and the PXA2xx code is migrated to it
> then it will be possible to create a machine description that will not
> contain the LCD controller. Such machine description doesn't require
> recompiling of whole QEMU to use it.
> 
> Best regards,
> Filip Navara

Great! I guess I can wait and work around the problem in the meantime by
commenting out the code. Thanks.

Thierry