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drm/radeon: Don't generate new fence for page flip.

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Use the fence of the new frontbuffer, if any.

Generating a new fence could cause us to wait for completely unrelated
rendering to finish before performing the flip.

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Michel Dänzer 2011-07-13 15:18:09 +00:00 committed by Dave Airlie
parent 5762a179b6
commit fcc485d667
1 changed files with 6 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/gpu/drm/radeon/radeon_display.c
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@ -282,7 +282,7 @@ void radeon_crtc_handle_flip(struct radeon_device *rdev, int crtc_id)
spin_lock_irqsave(&rdev->ddev->event_lock, flags);
work = radeon_crtc->unpin_work;
if (work == NULL ||
!radeon_fence_signaled(work->fence)) {
(work->fence && !radeon_fence_signaled(work->fence))) {
spin_unlock_irqrestore(&rdev->ddev->event_lock, flags);
return;
}
@ -348,7 +348,6 @@ static int radeon_crtc_page_flip(struct drm_crtc *crtc,
struct radeon_framebuffer *new_radeon_fb;
struct drm_gem_object *obj;
struct radeon_bo *rbo;
struct radeon_fence *fence;
struct radeon_unpin_work *work;
unsigned long flags;
u32 tiling_flags, pitch_pixels;
@ -359,16 +358,9 @@ static int radeon_crtc_page_flip(struct drm_crtc *crtc,
if (work == NULL)
return -ENOMEM;
r = radeon_fence_create(rdev, &fence);
if (unlikely(r != 0)) {
kfree(work);
DRM_ERROR("flip queue: failed to create fence.\n");
return -ENOMEM;
}
work->event = event;
work->rdev = rdev;
work->crtc_id = radeon_crtc->crtc_id;
work->fence = radeon_fence_ref(fence);
old_radeon_fb = to_radeon_framebuffer(crtc->fb);
new_radeon_fb = to_radeon_framebuffer(fb);
/* schedule unpin of the old buffer */
@ -377,6 +369,10 @@ static int radeon_crtc_page_flip(struct drm_crtc *crtc,
drm_gem_object_reference(obj);
rbo = gem_to_radeon_bo(obj);
work->old_rbo = rbo;
obj = new_radeon_fb->obj;
rbo = gem_to_radeon_bo(obj);
if (rbo->tbo.sync_obj)
work->fence = radeon_fence_ref(rbo->tbo.sync_obj);
INIT_WORK(&work->work, radeon_unpin_work_func);
/* We borrow the event spin lock for protecting unpin_work */
@ -391,9 +387,6 @@ static int radeon_crtc_page_flip(struct drm_crtc *crtc,
spin_unlock_irqrestore(&dev->event_lock, flags);
/* pin the new buffer */
obj = new_radeon_fb->obj;
rbo = gem_to_radeon_bo(obj);
DRM_DEBUG_DRIVER("flip-ioctl() cur_fbo = %p, cur_bbo = %p\n",
work->old_rbo, rbo);
@ -461,25 +454,11 @@ static int radeon_crtc_page_flip(struct drm_crtc *crtc,
goto pflip_cleanup1;
}
/* 32 ought to cover us */
r = radeon_ring_lock(rdev, 32);
if (r) {
DRM_ERROR("failed to lock the ring before flip\n");
goto pflip_cleanup2;
}
/* emit the fence */
radeon_fence_emit(rdev, fence);
/* set the proper interrupt */
radeon_pre_page_flip(rdev, radeon_crtc->crtc_id);
/* fire the ring */
radeon_ring_unlock_commit(rdev);
return 0;
pflip_cleanup2:
drm_vblank_put(dev, radeon_crtc->crtc_id);
pflip_cleanup1:
r = radeon_bo_reserve(rbo, false);
if (unlikely(r != 0)) {
@ -501,7 +480,7 @@ pflip_cleanup:
unlock_free:
drm_gem_object_unreference_unlocked(old_radeon_fb->obj);
spin_unlock_irqrestore(&dev->event_lock, flags);
radeon_fence_unref(&fence);
radeon_fence_unref(&work->fence);
kfree(work);
return r;