[Intel-gfx] [PATCH] drm/i915: disable drm agp support for !gen3 with kms enabled

[Eugeni Dodonov]

On 06/25/2012 10:58 AM, Daniel Vetter wrote:
> This is the quick&dirty way Dave Airlie suggested to workaround the
> midlayer drm agp brain-damange. Note that i915_probe is only called
> when the driver has ksm enabled, so no need to check for that.
> 
> We also need to move the intel_agp_enabled check at the right place.
> Note that the only thing this does is enforce the correct module load
> order (by using a symbol from intel-agp.ko) to ensure that the fake
> agp driver is ready before the drm core tries to set up the agp stuff.
> 
> v2: Add a comment to explain why gen3 needs all this legacy fake agp
> stuff - we've shipped an XvMC library with a kms-enabled ddx that
> requires it (but only on gen3).
> 
> v3: Make it clear that this is really a gen3 issue only in the
> comment.
> 
> Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Reviewed-by: Eugeni Dodonov <eugeni.dodonov at intel.com>

Eugeni