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Commit 1741dd4a authored by Chris Wilson's avatar Chris Wilson Committed by Eric Anholt
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drm/i915: Unroll wrapping of the ringbuffer. 



The tail is quadword aligned, so we can add two MI_NOOP as a time.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent ae7d49d8

drivers/gpu/drm/i915/intel_ringbuffer.c

+4 −2
Original line number Diff line number Diff line
@@ -682,9 +682,11 @@ int intel_wrap_ring_buffer(struct drm_device *dev, 
	}



	virt = (unsigned int *)(ring->virtual_start + ring->tail);

	rem /= 4;

	while (rem--)

	rem /= 8;

	while (rem--) {

		*virt++ = MI_NOOP;

		*virt++ = MI_NOOP;

	}



	ring->tail = 0;

	ring->space = ring->head - 8;