linux-kernel - Re: [PATCH 1/3] x86: Expand EFI GOP handle search

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Date:	Wed, 23 May 2012 21:21:13 +0100
From:	Matt Fleming <matt.fleming@...el.com>
To:	Matthew Garrett <mjg@...hat.com>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH 1/3] x86: Expand EFI GOP handle search

On Wed, 2012-05-23 at 14:08 -0400, Matthew Garrett wrote:
> Some UEFI implementations provide multiple GOP handles, with one acting
> as a splitter device to handle the case of multiple outputs being present.
> The downside of this approach is that the console splitter device may
> report an inaccurate stride value. We currently get around this by looking
> for a device that implements the PCI IO protocol. However, this fails on
> some devices - the GOP may be attached to the display device rather than
> the GPU. We can handle that scenario by looking for a handle with an EDID
> protocol attached to it.
> 
> Signed-off-by: Matthew Garrett <mjg@...hat.com>
> Cc: Matt Fleming <matt.fleming@...el.com>
> ---
>  arch/x86/boot/compressed/eboot.c |   27 ++++++++++++++++-----------
>  include/linux/efi.h              |    3 +++
>  2 files changed, 19 insertions(+), 11 deletions(-)

Seems fair enough. Thanks Matthew.

Acked-by: Matt Fleming <matt.fleming@...el.com>


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