Re: [PATCH] drm/i915: Disable stolen on 865G

[Daniel Vetter <daniel@ffwll.ch>]

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@chris-wilson.co.uk>
> Cc: Ville Syrj�l� <ville.syrjala@linux.intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: stable@vger.kernel.org

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> ---
>  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