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authorMichel Dänzer <michel.daenzer@amd.com>2011-07-13 15:18:09 +0000
committerDave Airlie <airlied@redhat.com>2011-07-14 07:14:42 +0100
commitfcc485d6672952f0ec6d077ea92f703670075323 (patch)
tree74689c7a2cf5c73d15d29fa06a7263e5a8be9c4e /drivers
parent5762a179b64cf37305d1d4d624e1b6ad9ee80602 (diff)
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drm/radeon: Don't generate new fence for page flip.
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/radeon/radeon_display.c33
1 files changed, 6 insertions, 27 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 292f73f0ddbd..ffce85a91165 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -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;