drm/fence: add drm_crtc_create_fence()

Instead of dealing with crtc details inside drm_atomic.c we should
just export a function that creates a new crtc fence for us and
use that.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1481046437-18778-1-git-send-email-gustavo@padovan.org

3 files changed, 19 insertions, 17 deletions

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 19d7bcb88217..72fa5b20baf1 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1864,20 +1864,6 @@ EXPORT_SYMBOL(drm_atomic_clean_old_fb);
  *      helpers and for the DRM event handling for existing userspace.
  */
 
-static struct dma_fence *get_crtc_fence(struct drm_crtc *crtc)
-{
-        struct dma_fence *fence;
-
-        fence = kzalloc(sizeof(*fence), GFP_KERNEL);
-        if (!fence)
-                return NULL;
-
-        dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock,
-                       crtc->fence_context, ++crtc->fence_seqno);
-
-        return fence;
-}
-
 struct drm_out_fence_state {
         s64 __user *out_fence_ptr;
         struct sync_file *sync_file;
@@ -1959,7 +1945,7 @@ static int prepare_crtc_signaling(struct drm_device *dev,
                         f[*num_fences].out_fence_ptr = fence_ptr;
                         *fence_state = f;
 
-                        fence = get_crtc_fence(crtc);
+                        fence = drm_crtc_create_fence(crtc);
                         if (!fence)
                                 return -ENOMEM;
 
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 90931e039731..e75f62cd8a65 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -152,6 +152,8 @@ static void drm_crtc_crc_fini(struct drm_crtc *crtc)
 #endif
 }
 
+static const struct dma_fence_ops drm_crtc_fence_ops;
+
 static struct drm_crtc *fence_to_crtc(struct dma_fence *fence)
 {
         BUG_ON(fence->ops != &drm_crtc_fence_ops);
@@ -177,13 +179,27 @@ static bool drm_crtc_fence_enable_signaling(struct dma_fence *fence)
         return true;
 }
 
-const struct dma_fence_ops drm_crtc_fence_ops = {
+static const struct dma_fence_ops drm_crtc_fence_ops = {
         .get_driver_name = drm_crtc_fence_get_driver_name,
         .get_timeline_name = drm_crtc_fence_get_timeline_name,
         .enable_signaling = drm_crtc_fence_enable_signaling,
         .wait = dma_fence_default_wait,
 };
 
+struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc)
+{
+        struct dma_fence *fence;
+
+        fence = kzalloc(sizeof(*fence), GFP_KERNEL);
+        if (!fence)
+                return NULL;
+
+        dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock,
+                       crtc->fence_context, ++crtc->fence_seqno);
+
+        return fence;
+}
+
 /**
  * drm_crtc_init_with_planes - Initialise a new CRTC object with
  *    specified primary and cursor planes.
diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
index 33b17d0b127e..cdf6860c9d22 100644
--- a/drivers/gpu/drm/drm_crtc_internal.h
+++ b/drivers/gpu/drm/drm_crtc_internal.h
@@ -43,7 +43,7 @@ int drm_crtc_check_viewport(const struct drm_crtc *crtc,
 int drm_crtc_register_all(struct drm_device *dev);
 void drm_crtc_unregister_all(struct drm_device *dev);
 
-extern const struct dma_fence_ops drm_crtc_fence_ops;
+struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc);
 
 /* IOCTLs */
 int drm_mode_getcrtc(struct drm_device *dev,