Changbin Du ffe2a503b0 drm/i915/gvt: Reduce rcs mocs switch latency
Use I915_WRITE_FW instead of I915_WRITE to reduce overhead.
The overall mmio switch latency lowers from ~600us to ~180us.

Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
2017-11-16 11:48:33 +08:00
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