[PATCH 4/9] drm/i915: Use i915_vma_offset() in intel_dpt_offset()

[Ville Syrjala <ville.syrjala@linux.intel.com>]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Replace the open coded vma mm node stuff in intel_dpt_offset()
with i915_vma_offset(). This will also include the VT-d guard
in the result. Granted that should always be 0 for DPT, but
it seems prudent to include that in our DPT vma offset check
anyway.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dpt.c    | 2 +-
 drivers/gpu/drm/i915/display/intel_fb_pin.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dpt.c b/drivers/gpu/drm/i915/display/intel_dpt.c
index 43bd97e4f589..2bf4ad6a0fdf 100644
--- a/drivers/gpu/drm/i915/display/intel_dpt.c
+++ b/drivers/gpu/drm/i915/display/intel_dpt.c
@@ -321,5 +321,5 @@ void intel_dpt_destroy(struct i915_address_space *vm)
 
 u64 intel_dpt_offset(struct i915_vma *dpt_vma)
 {
-	return dpt_vma->node.start;
+	return i915_vma_offset(dpt_vma);
 }
diff --git a/drivers/gpu/drm/i915/display/intel_fb_pin.c b/drivers/gpu/drm/i915/display/intel_fb_pin.c
index a5b9d87b2255..d40e3d96b14a 100644
--- a/drivers/gpu/drm/i915/display/intel_fb_pin.c
+++ b/drivers/gpu/drm/i915/display/intel_fb_pin.c
@@ -300,8 +300,8 @@ int intel_plane_pin_fb(struct intel_plane_state *plane_state,
 		WARN_ON(plane_state->ggtt_vma == plane_state->dpt_vma);
 
 		/*
-		 * The DPT object contains only one vma, so
-		 * the VMA's offset within the DPT is always 0.
+		 * The DPT object contains only one vma, and there is no VT-d
+		 * guard, so the VMA's offset within the DPT is always 0.
 		 */
 		drm_WARN_ON(display->drm, intel_dpt_offset(plane_state->dpt_vma));
 	}
-- 
2.45.3