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drm/i915: Fix current fb blocking for page flip 

Block execbuffer for the fb to be flipped away, not the one that is to
be flipped in.

[ickle: rewritten for -next]
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-by: Kristian Høgsberg <krh@bitplanet.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chia-I Wu 2010-10-21 19:35:54 +01:00 committed by Chris Wilson
parent f00a3ddf91
commit dc3f82c2e5
1 changed files with 8 additions and 5 deletions
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13
drivers/gpu/drm/i915/intel_display.c
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@ -4991,9 +4991,7 @@ static void do_intel_finish_page_flip(struct drm_device *dev,
spin_unlock_irqrestore(&dev->event_lock, flags);
obj_priv = to_intel_bo(work->pending_flip_obj);
/* Initial scanout buffer will have a 0 pending flip count */
obj_priv = to_intel_bo(work->old_fb_obj);
atomic_clear_mask(1 << intel_crtc->plane,
&obj_priv->pending_flip.counter);
if (atomic_read(&obj_priv->pending_flip) == 0)
@ -5092,9 +5090,14 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
if (ret)
goto cleanup_objs;
obj_priv = to_intel_bo(obj);
atomic_add(1 << intel_crtc->plane, &obj_priv->pending_flip);
/* Block clients from rendering to the new back buffer until
* the flip occurs and the object is no longer visible.
*/
atomic_add(1 << intel_crtc->plane,
&to_intel_bo(work->old_fb_obj)->pending_flip);
work->pending_flip_obj = obj;
obj_priv = to_intel_bo(obj);
if (IS_GEN3(dev) || IS_GEN2(dev)) {
u32 flip_mask;