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    drm/i915: disable drm agp support for !gen3 with kms enabled · 01a06850
    Daniel Vetter 提交于
    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 only a gen3 issue in the comment.
    Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
    Reviewed-by: NEugeni Dodonov <eugeni.dodonov@intel.com>
    Signed-Off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
    01a06850
i915_drv.c 35.0 KB