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Commit bbf0c6b3 authored by Daniel Vetter's avatar Daniel Vetter Committed by Chris Wilson
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drm/i915: announce to userspace that the bsd ring is coherent 



Otherwise we can't really fix the abi-braindeadness of forcing
libva to manually wait for rendering when switching rings. Which
in turn makes implementing hw semaphores a pointless exercise
(at least for ironlake).

[Also added the relaxed fencing param to explain the jump in
numbering - relaxed fencing is in -next.]

Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent 136711be

drivers/gpu/drm/i915/i915_dma.c

+3 −0
Original line number Diff line number Diff line
@@ -767,6 +767,9 @@ static int i915_getparam(struct drm_device *dev, void *data, 
	case I915_PARAM_HAS_BLT:

		value = HAS_BLT(dev);

		break;

	case I915_PARAM_HAS_COHERENT_RINGS:

		value = 1;

		break;

	default:

		DRM_DEBUG_DRIVER("Unknown parameter %d\n",

				 param->param);

include/drm/i915_drm.h

+2 −0
Original line number Diff line number Diff line
@@ -287,6 +287,8 @@ typedef struct drm_i915_irq_wait { 
#define I915_PARAM_HAS_EXECBUF2          9

#define I915_PARAM_HAS_BSD		 10

#define I915_PARAM_HAS_BLT		 11

#define I915_PARAM_HAS_RELAXED_FENCING	 12

#define I915_PARAM_HAS_COHERENT_RINGS	 13



typedef struct drm_i915_getparam {

	int param;