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drm/i915: add Ivy Bridge page flip support 

Use the blit ring for submitting flips since the render ring doesn't
generate flip complete interrupts.

Fixes bugs:

	https://bugs.freedesktop.org/show_bug.cgi?id=38362
	https://bugs.freedesktop.org/show_bug.cgi?id=38392
	https://bugs.freedesktop.org/show_bug.cgi?id=38393

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Tested-by:  Jian J Zhao <jian.j.zhao@intel.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Jesse Barnes 2011-06-16 12:18:54 -07:00 committed by Keith Packard
parent 8c9f3aaf8e
commit 7c9017e5b7
1 changed files with 36 additions and 0 deletions
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36
drivers/gpu/drm/i915/intel_display.c
View File

@ -6411,6 +6411,39 @@ static int intel_gen6_queue_flip(struct drm_device *dev,
return ret;
}
/*
* On gen7 we currently use the blit ring because (in early silicon at least)
* the render ring doesn't give us interrpts for page flip completion, which
* means clients will hang after the first flip is queued. Fortunately the
* blit ring generates interrupts properly, so use it instead.
*/
static int intel_gen7_queue_flip(struct drm_device *dev,
struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_i915_gem_object *obj)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_ring_buffer *ring = &dev_priv->ring[BCS];
int ret;
ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
if (ret)
goto out;
ret = intel_ring_begin(ring, 4);
if (ret)
goto out;
intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 | (intel_crtc->plane << 19));
intel_ring_emit(ring, (fb->pitch | obj->tiling_mode));
intel_ring_emit(ring, (obj->gtt_offset));
intel_ring_emit(ring, (MI_NOOP));
intel_ring_advance(ring);
out:
return ret;
}
static int intel_default_queue_flip(struct drm_device *dev,
struct drm_crtc *crtc,
struct drm_framebuffer *fb,
@ -7758,6 +7791,9 @@ static void intel_init_display(struct drm_device *dev)
case 6:
dev_priv->display.queue_flip = intel_gen6_queue_flip;
break;
case 7:
dev_priv->display.queue_flip = intel_gen7_queue_flip;
break;
}
}