[PATCH v2] drm/vram-helpers: Set plane fence for display update

[Thomas Zimmermann]

Calling the VRAM helper's prepare_fb() helper now sets the plane's
fence object. This will be useful for PRIME support. VRAM helpers
don't support buffer sharing ATM, so for now there are no drivers
requiring this change.

v2:
	* removed a TODO comment about buffer synchronization

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/drm_gem_vram_helper.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index b3201a70cbfcb..cdf710be39da4 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -5,6 +5,7 @@
 #include <drm/drm_drv.h>
 #include <drm/drm_file.h>
 #include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_gem_ttm_helper.h>
 #include <drm/drm_gem_vram_helper.h>
 #include <drm/drm_mode.h>
@@ -670,9 +671,9 @@ EXPORT_SYMBOL(drm_gem_vram_driver_dumb_mmap_offset);
  * @plane:	a DRM plane
  * @new_state:	the plane's new state
  *
- * During plane updates, this function pins the GEM VRAM
- * objects of the plane's new framebuffer to VRAM. Call
- * drm_gem_vram_plane_helper_cleanup_fb() to unpin them.
+ * During plane updates, this function sets the plane's fence and
+ * pins the GEM VRAM objects of the plane's new framebuffer to VRAM.
+ * Call drm_gem_vram_plane_helper_cleanup_fb() to unpin them.
  *
  * Returns:
  *	0 on success, or
@@ -698,6 +699,10 @@ drm_gem_vram_plane_helper_prepare_fb(struct drm_plane *plane,
 			goto err_drm_gem_vram_unpin;
 	}
 
+	ret = drm_gem_fb_prepare_fb(plane, new_state);
+	if (ret)
+		goto err_drm_gem_vram_unpin;
+
 	return 0;
 
 err_drm_gem_vram_unpin:
-- 
2.26.0