drm/i915: Skip fence installation for objects with rotated views (v4)

While pinning a fb object to the display plane, only install a fence
if the object is using a normal view. This corresponds with the
behavior found in i915_gem_object_do_pin() where the fencability
criteria is determined only for objects with normal views.

v2:
Look at the object's map_and_fenceable flag to determine whether to
install a fence or not (Chris).

v3:
Pin and unpin a fence only if the current view type is normal.

v4:
Extend the "view type is normal" check for pin_fence as well.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Ville Syrjala <ville.syrjala@linux.intel.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1446170078-20792-1-git-send-email-vivek.kasireddy@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 81358ca..6795df5 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2389,22 +2389,24 @@ intel_pin_and_fence_fb_obj(struct drm_plane *plane,
         * framebuffer compression.  For simplicity, we always install
         * a fence as the cost is not that onerous.
         */
-       ret = i915_gem_object_get_fence(obj);
-       if (ret == -EDEADLK) {
-               /*
-                * -EDEADLK means there are no free fences
-                * no pending flips.
-                *
-                * This is propagated to atomic, but it uses
-                * -EDEADLK to force a locking recovery, so
-                * change the returned error to -EBUSY.
-                */
-               ret = -EBUSY;
-               goto err_unpin;
-       } else if (ret)
-               goto err_unpin;
+       if (view.type == I915_GGTT_VIEW_NORMAL) {
+               ret = i915_gem_object_get_fence(obj);
+               if (ret == -EDEADLK) {
+                       /*
+                        * -EDEADLK means there are no free fences
+                        * no pending flips.
+                        *
+                        * This is propagated to atomic, but it uses
+                        * -EDEADLK to force a locking recovery, so
+                        * change the returned error to -EBUSY.
+                        */
+                       ret = -EBUSY;
+                       goto err_unpin;
+               } else if (ret)
+                       goto err_unpin;
 
-       i915_gem_object_pin_fence(obj);
+               i915_gem_object_pin_fence(obj);
+       }
 
        dev_priv->mm.interruptible = true;
        intel_runtime_pm_put(dev_priv);
@@ -2430,7 +2432,9 @@ static void intel_unpin_fb_obj(struct drm_framebuffer *fb,
        ret = intel_fill_fb_ggtt_view(&view, fb, plane_state);
        WARN_ONCE(ret, "Couldn't get view from plane state!");
 
-       i915_gem_object_unpin_fence(obj);
+       if (view.type == I915_GGTT_VIEW_NORMAL)
+               i915_gem_object_unpin_fence(obj);
+
        i915_gem_object_unpin_from_display_plane(obj, &view);
 }