linux-kernel - Re: [Linux-fbdev-devel] Fwd: [Suspend-devel] resume not working on acer ferrari 4005 with radeonfb enabled

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Message-Id: <1163744220.5940.443.camel@localhost.localdomain>
Date:	Fri, 17 Nov 2006 17:17:00 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Stuffed Crust <pizza@...ftnet.org>
Cc:	linux-fbdev-devel@...ts.sourceforge.net,
	Christian Hoffmann <chrmhoffmann@...il.com>,
	Andrew Morton <akpm@...l.org>,
	Christian Hoffmann <Christian.Hoffmann@...lstreetsystems.com>,
	LKML <linux-kernel@...r.kernel.org>, Pavel Machek <pavel@....cz>
Subject: Re: [Linux-fbdev-devel] Fwd: [Suspend-devel] resume not working on
	acer ferrari 4005 with radeonfb enabled

On Fri, 2006-11-17 at 00:27 -0500, Stuffed Crust wrote:
> On Thu, Nov 16, 2006 at 11:44:40PM +0100, Rafael J. Wysocki wrote:
> > I think the call to radeon_restore_pci_cfg(rinfo) causes the problem to happen.
> 
> radeonfb is still using its own code for saving and restoring PCI 
> registers; I'm in the process of fixing it up to use proper PCI
> subsystem calls.  That will hopefully work better.   
> 
> It's possible there's a good reason (other than "nobody's ported it over 
> yet") that the radeonfb driver is doing it manually, but I don't know 
> why that would be the case.  

Well, radeonfb has code to bring back some cards from D2 or D3 cold (or
hard reset). It differenciates those states by checking if the config
space has been trashed. We should try to find out some better way.

Cheers,
Ben.


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