linux-kernel - Re: [Intel-gfx] [PATCH] ACPI/Intel: Rework Opregion support

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Message-ID: <20110315133055.GA33193@dspnet.fr>
Date:	Tue, 15 Mar 2011 14:30:55 +0100
From:	Olivier Galibert <galibert@...ox.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Indan Zupancic <indan@....nu>, Dave Airlie <airlied@...ux.ie>,
	intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, Len Brown <lenb@...nel.org>,
	Alan Cox <alan@...ux.intel.com>
Subject: Re: [Intel-gfx] [PATCH] ACPI/Intel: Rework Opregion support

On Tue, Mar 15, 2011 at 01:52:26AM +0000, Matthew Garrett wrote:
> Now that we've got multiple consumers it's probably not helpful to move 
> the (potentially chip-specific) VBT handling to general code. We've got 
> zero documentation on how GMA500 handles VBT, and not a great deal more 
> for i915.

I'm not sure what you mean by "handles".  If you mean find it, the
gma500 driver code reads a 32-bit pointer to the opregion at offset
0xfc in the pci configuration space.  If you mean parse it, I haven't
seen anything that looked different to what the current kernel code
parses.

  OG.

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