linux-kernel - Re: i965 testers wanted (Re: intel-agp PM experiences)

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Date:	Mon, 29 Jan 2007 23:21:31 +0100
From:	Frédéric Riss <frederic.riss@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	andi@...as.de, davej@...emonkey.org.uk,
	kernel list <linux-kernel@...r.kernel.org>, seife@...e.de,
	Wang Zhenyu <zhenyu.z.wang@...el.com>
Subject: Re: i965 testers wanted (Re: intel-agp PM experiences)

Le lundi 29 janvier 2007 à 23:10 +0100, Pavel Machek a écrit :
> > > Ok, I guess we'd like some testing here... so that in can be fixed in
> > > mainline...
> > 
> > I can confirm that this patch is needed for my Intel Mac Mini to resume
> > correctly when used without BIOS emulation (EFI mode). Here're the
> > relevant lspci lines:
> 
> Can you attach the patch you tested (there was link above, but it did
> not work for me), and try pushing it through maintainers?

I inlined the patch I used below. If I'm not mistaken, the maintainer is
Davej which is already in the Cc: list. I think it's exactly the same as
was submitted in http://lkml.org/lkml/2007/1/16/297 (I may have hand
copied it though, can't remember). The above link is more complete as it
contains the Signed-off-by and a description.

diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index ab0a9c0..f64a115 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -1955,6 +1955,15 @@ static int agp_intel_resume(struct pci_d
 
 	pci_restore_state(pdev);
 
+	/* We should restore our graphics device's config space,
+	 * as host bridge (00:00) resumes before graphics device (02:00),
+	 * then our access to its pci space can work right. 
+	 */
+	if (intel_i810_private.i810_dev)
+		pci_restore_state(intel_i810_private.i810_dev);
+	if (intel_i830_private.i830_dev)
+		pci_restore_state(intel_i830_private.i830_dev);
+
 	if (bridge->driver == &intel_generic_driver)
 		intel_configure();
 	else if (bridge->driver == &intel_850_driver)


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