diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 6fdd7ba47896..ea78d70de9f3 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1009,29 +1009,46 @@ EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state * @dev: DRM device * @state: atomic state object with old state structures + * @pre_swap: if true, do an interruptible wait * * For implicit sync, driver should fish the exclusive fence out from the * incoming fb's and stash it in the drm_plane_state. This is called after * drm_atomic_helper_swap_state() so it uses the current plane state (and * just uses the atomic state to find the changed planes) + * + * Returns zero if success or < 0 if fence_wait() fails. */ -void drm_atomic_helper_wait_for_fences(struct drm_device *dev, - struct drm_atomic_state *state) +int drm_atomic_helper_wait_for_fences(struct drm_device *dev, + struct drm_atomic_state *state, + bool pre_swap) { struct drm_plane *plane; struct drm_plane_state *plane_state; - int i; + int i, ret; for_each_plane_in_state(state, plane, plane_state, i) { - if (!plane->state->fence) + if (!pre_swap) + plane_state = plane->state; + + if (!plane_state->fence) continue; - WARN_ON(!plane->state->fb); + WARN_ON(!plane_state->fb); - fence_wait(plane->state->fence, false); - fence_put(plane->state->fence); - plane->state->fence = NULL; + /* + * If waiting for fences pre-swap (ie: nonblock), userspace can + * still interrupt the operation. Instead of blocking until the + * timer expires, make the wait interruptible. + */ + ret = fence_wait(plane_state->fence, pre_swap); + if (ret) + return ret; + + fence_put(plane_state->fence); + plane_state->fence = NULL; } + + return 0; } EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); @@ -1179,7 +1196,7 @@ static void commit_tail(struct drm_atomic_state *state) funcs = dev->mode_config.helper_private; - drm_atomic_helper_wait_for_fences(dev, state); + drm_atomic_helper_wait_for_fences(dev, state, false); drm_atomic_helper_wait_for_dependencies(state); @@ -1238,6 +1255,12 @@ int drm_atomic_helper_commit(struct drm_device *dev, if (ret) return ret; + if (!nonblock) { + ret = drm_atomic_helper_wait_for_fences(dev, state, true); + if (ret) + return ret; + } + /* * This is the point of no return - everything below never fails except * when the hw goes bonghits. Which means we can commit the new state on diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c index 5df252cebf1c..73bae382eac3 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -112,7 +112,7 @@ static void complete_commit(struct msm_commit *c, bool async) struct msm_drm_private *priv = dev->dev_private; struct msm_kms *kms = priv->kms; - drm_atomic_helper_wait_for_fences(dev, state); + drm_atomic_helper_wait_for_fences(dev, state, false); kms->funcs->prepare_commit(kms, state); diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h index f86682825d68..7ff92b09fd9c 100644 --- a/include/drm/drm_atomic_helper.h +++ b/include/drm/drm_atomic_helper.h @@ -45,8 +45,9 @@ int drm_atomic_helper_commit(struct drm_device *dev, struct drm_atomic_state *state, bool nonblock); -void drm_atomic_helper_wait_for_fences(struct drm_device *dev, - struct drm_atomic_state *state); +int drm_atomic_helper_wait_for_fences(struct drm_device *dev, + struct drm_atomic_state *state, + bool pre_swap); bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev, struct drm_atomic_state *old_state, struct drm_crtc *crtc);