From c13a496070571e8225a0574ff1d385e41dc9dfc8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Christian=20K=C3=B6nig?= Date: Thu, 11 Feb 2016 15:48:30 +0100 Subject: [PATCH 0319/1110] drm/amdgpu: stop blocking for page filp fences MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Just register an callback and reschedule the work item if necessary. Signed-off-by: Christian König Acked-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 43 ++++++++++++++++++----------- 2 files changed, 28 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index d56dc9c..9a9673c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -721,6 +721,7 @@ struct amdgpu_flip_work { struct fence *excl; unsigned shared_count; struct fence **shared; + struct fence_cb cb; }; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c index da49396..35756ad 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c @@ -35,24 +35,32 @@ #include #include -static void amdgpu_flip_wait_fence(struct amdgpu_device *adev, - struct fence **f) +static void amdgpu_flip_callback(struct fence *f, struct fence_cb *cb) { - long r; + struct amdgpu_flip_work *work = + container_of(cb, struct amdgpu_flip_work, cb); + struct amdgpu_device *adev = work->adev; + struct amdgpu_crtc *amdgpu_crtc = adev->mode_info.crtcs[work->crtc_id]; - if (*f == NULL) - return; + fence_put(f); + queue_work(amdgpu_crtc->pflip_queue, &work->flip_work); +} - r = fence_wait(*f, false); - if (r) - DRM_ERROR("failed to wait on page flip fence (%ld)!\n", r); +static bool amdgpu_flip_handle_fence(struct amdgpu_flip_work *work, + struct fence **f) +{ + struct fence *fence= *f; + + if (fence == NULL) + return false; - /* We continue with the page flip even if we failed to wait on - * the fence, otherwise the DRM core and userspace will be - * confused about which BO the CRTC is scanning out - */ - fence_put(*f); *f = NULL; + + if (!fence_add_callback(fence, &work->cb, amdgpu_flip_callback)) + return true; + + fence_put(*f); + return false; } static void amdgpu_flip_work_func(struct work_struct *__work) @@ -68,9 +76,12 @@ static void amdgpu_flip_work_func(struct work_struct *__work) int vpos, hpos, stat, min_udelay = 0; struct drm_vblank_crtc *vblank = &crtc->dev->vblank[work->crtc_id]; - amdgpu_flip_wait_fence(adev, &work->excl); + if (amdgpu_flip_handle_fence(work, &work->excl)) + return; + for (i = 0; i < work->shared_count; ++i) - amdgpu_flip_wait_fence(adev, &work->shared[i]); + if (amdgpu_flip_handle_fence(work, &work->shared[i])) + return; /* We borrow the event spin lock for protecting flip_status */ spin_lock_irqsave(&crtc->dev->event_lock, flags); @@ -246,7 +257,7 @@ int amdgpu_crtc_page_flip(struct drm_crtc *crtc, /* update crtc fb */ crtc->primary->fb = fb; spin_unlock_irqrestore(&crtc->dev->event_lock, flags); - queue_work(amdgpu_crtc->pflip_queue, &work->flip_work); + amdgpu_flip_work_func(&work->flip_work); return 0; vblank_cleanup: -- 2.7.4