[Intel-gfx] drm/i915/hsw/bdw: Enable resource streamer

[Abdiel Janulgue]

This is a re-spin of my resource streamer patchset from a year ago.
The resource streamer is a hw-feature that helps in reducing commands
submitted by the CPU.

We have finally have the Mesa optimization that requires the use of
this interface.

Abdiel Janulgue (2):
      drm/i915/hsw/bdw: Expose I915_EXEC_RESOURCE_STREAMER flag
      drm/i915/hsw/bdw: Enable resource streamer bits on MI_BATCH_BUFFER_START

 drivers/gpu/drm/i915/i915_gem_execbuffer.c | 14 ++++++++++++++
 drivers/gpu/drm/i915/i915_reg.h            |  1 +
 drivers/gpu/drm/i915/intel_ringbuffer.c    |  6 ++++--
 drivers/gpu/drm/i915/intel_ringbuffer.h    |  1 +
 include/uapi/drm/i915_drm.h                |  7 ++++++-
 5 files changed, 26 insertions(+), 3 deletions(-)