[Intel-gfx] [PATCH] drm/i915: Disable stolen on 865G

[Ville Syrjälä]

On Thu, Aug 04, 2016 at 06:31:21PM +0200, Daniel Vetter wrote:
> On Thu, Aug 04, 2016 at 10:56:04AM +0100, Chris Wilson wrote:
> > It appears our calculation for the address of stolen memory is incorrect
> > for 865G, so for the time being disable our use of that memory.
> > 
> > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96473
> > Fixes: 0ad98c74e093 ("drm/i915: Deatermine the stolen memory base address...")
> > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> > Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> > Cc: stable at vger.kernel.org
> 
> Acked-by: Daniel Vetter <daniel.vetter at ffwll.ch>

There's a potentially better patch (one that actually fixes the stolen
base calculation) attached to the bug.

> > ---
> >  drivers/gpu/drm/i915/i915_gem_stolen.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
> > index e1791fe96674..8b501ddbc784 100644
> > --- a/drivers/gpu/drm/i915/i915_gem_stolen.c
> > +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
> > @@ -122,6 +122,7 @@ static unsigned long i915_stolen_to_physical(struct drm_device *dev)
> >  		 * always at TOUD? Ie. is it always the last
> >  		 * one to be allocated by the BIOS?
> >  		 */
> > +		if (0) /* https://bugs.freedesktop.org/show_bug.cgi?id=96473 */
> >  		pci_bus_read_config_word(dev->pdev->bus, PCI_DEVFN(0, 0),
> >  					 I865_TOUD, &toud);
> >  
> > -- 
> > 2.8.1
> > 
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

-- 
Ville Syrjälä
Intel OTC