[PATCH 2/2] drm/i915/hsw: Enable resource streamer bit on MI_BATCH_BUFFER_START (v3)

[Abdiel Janulgue <abdiel.janulgue@linux.intel.com>]

v3: Use the I915_DISPATCH_RS flag to determine if batchbuffer needs
    resource streamer bit.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h         | 1 +
 drivers/gpu/drm/i915/intel_ringbuffer.c | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index c246727..f3c9103 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -246,6 +246,7 @@
 #define   MI_BATCH_NON_SECURE_HSW 	(1<<13)
 #define MI_BATCH_BUFFER_START	MI_INSTR(0x31, 0)
 #define   MI_BATCH_GTT		    (2<<6) /* aliased with (1<<7) on gen4 */
+#define   MI_BATCH_RESOURCE_STREAMER (1<<10)
 #define MI_SEMAPHORE_MBOX	MI_INSTR(0x16, 1) /* gen6+ */
 #define  MI_SEMAPHORE_GLOBAL_GTT    (1<<22)
 #define  MI_SEMAPHORE_UPDATE	    (1<<21)
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index b67104a..f9564b1 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1654,7 +1654,8 @@ hsw_ring_dispatch_execbuffer(struct intel_ring_buffer *ring,
 
 	intel_ring_emit(ring,
 			MI_BATCH_BUFFER_START | MI_BATCH_PPGTT_HSW |
-			(flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE_HSW));
+			(flags & I915_DISPATCH_SECURE ? 0 : MI_BATCH_NON_SECURE_HSW) |
+			(flags & I915_DISPATCH_RS ? MI_BATCH_RESOURCE_STREAMER : 0));
 	/* bit0-7 is the length on GEN6+ */
 	intel_ring_emit(ring, offset);
 	intel_ring_advance(ring);
-- 
1.8.2.1