drm/i915: add media well to VLV force wake routines v2
We could split this out into a separate routine at some point as an optimization. v2: use FORCEWAKE_KERNEL (Ville) Note: Ville mentioned in his review that he declines to be responsible if this blows up due to the lack of "readback a register != FW_ACK, but from the same cacheline" magic we have in other forcewake implementations. Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org> Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com> [danvet: Bikeshed overtly long lines according to checkpatch.pl. Nope, this time around I didn't screw up printk message since I've left those alone.] Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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