[PATCH 02/11] drm/atomic: export drm_atomic_helper_wait_for_fences()

[Rob Clark]

Signed-off-by: Rob Clark <robdclark at gmail.com>
---
 drivers/gpu/drm/drm_atomic_helper.c | 15 +++++++++++++--
 include/drm/drm_atomic_helper.h     |  2 ++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c 
b/drivers/gpu/drm/drm_atomic_helper.c
index 7c52306..aa72732 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -927,7 +927,17 @@ void drm_atomic_helper_commit_modeset_enables(struct 
drm_device *dev,
 }
 EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables);

-static void wait_for_fences(struct drm_device *dev,
+/**
+ * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state
+ * @dev: DRM device
+ * @state: atomic state object with old state structures
+ *
+ * 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)
+ */
+void drm_atomic_helper_wait_for_fences(struct drm_device *dev,
                            struct drm_atomic_state *state)
 {
        struct drm_plane *plane;
@@ -945,6 +955,7 @@ static void wait_for_fences(struct drm_device *dev,
                plane->state->fence = NULL;
        }
 }
+EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences);

 /**
  * drm_atomic_helper_framebuffer_changed - check if framebuffer has changed
@@ -1106,7 +1117,7 @@ int drm_atomic_helper_commit(struct drm_device *dev,
         * current layout.
         */

-       wait_for_fences(dev, state);
+       drm_atomic_helper_wait_for_fences(dev, state);

        drm_atomic_helper_commit_modeset_disables(dev, state);

diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index fe5efad..2b20b28 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -42,6 +42,8 @@ int drm_atomic_helper_commit(struct drm_device *dev,
                             struct drm_atomic_state *state,
                             bool async);

+void drm_atomic_helper_wait_for_fences(struct drm_device *dev,
+                                       struct drm_atomic_state *state);
 bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev,
                                           struct drm_atomic_state *old_state,
                                           struct drm_crtc *crtc);
-- 
2.5.0