linux-kernel - Re: [PATCH 4/5] x86_64 EFI support -v3: EFI framebuffer driver

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Date:	Tue, 31 Jul 2007 14:35:08 +0800
From:	"Huang, Ying" <ying.huang@...el.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	ak@...e.de, akpm@...ux-foundation.org,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Chandramouli Narayanan <mouli@...ux.intel.com>,
	linux-fbdev-devel@...ts.sourceforge.net,
	"Antonino A. Daplas" <adaplas@....net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] x86_64 EFI support -v3: EFI framebuffer driver

On Mon, 2007-07-30 at 22:34 -0600, Eric W. Biederman wrote:
> "Huang, Ying" <ying.huang@...el.com> writes:
> 
> > This patch adds Graphics Output Protocol support to the kernel.
> > UEFI2.0 spec deprecates Universal Graphics Adapter (UGA) protocol and
> > only Graphics Output Protocol (GOP) is produced. Therefore, the boot
> > loader needs to query the UEFI firmware with appropriate Output
> > Protocol and pass the video information to the kernel. As a result of
> > GOP protocol, an EFI framebuffer driver is needed for displaying
> > console messages. The patch adds a EFI framebuffer driver. The EFI
> > frame buffer driver in this patch is based on the Intel Mac
> > framebuffer driver.
> >
> > The ELILO bootloader takes care of passing the video information as
> > appropriate for EFI firmware.
> 
> Am I correct in understanding that you are not using any of the efi
> runtime service infrastructure you have built up in other patches?

Yes. The EFI runtime service is not needed for this patch.

Best Regards,
Huang Ying
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