drm/i915/overlay: Replace i915_gem_obj_ggtt_offset() with the known flip_addr

When setting up the overlay page, we pin it into the GGTT (when using
virtual addresses) and store the offset as overlay->flip_addr. Rather
than doing a lookup of the GGTT address everytime, we can use the known
address instead.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461833819-3991-2-git-send-email-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index 6b016c9..86ec53d 100644 (file)
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -198,7 +198,7 @@ intel_overlay_map_regs(struct intel_overlay *overlay)
                regs = (struct overlay_registers __iomem *)overlay->reg_bo->phys_handle->vaddr;
        else
                regs = io_mapping_map_wc(ggtt->mappable,
-                                        i915_gem_obj_ggtt_offset(overlay->reg_bo));
+                                        overlay->flip_addr);
 
        return regs;
 }
@@ -1493,7 +1493,7 @@ intel_overlay_map_regs_atomic(struct intel_overlay *overlay)
                        overlay->reg_bo->phys_handle->vaddr;
        else
                regs = io_mapping_map_atomic_wc(ggtt->mappable,
-                                               i915_gem_obj_ggtt_offset(overlay->reg_bo));
+                                               overlay->flip_addr);
 
        return regs;
 }
@@ -1523,10 +1523,7 @@ intel_overlay_capture_error_state(struct drm_device *dev)
 
        error->dovsta = I915_READ(DOVSTA);
        error->isr = I915_READ(ISR);
-       if (OVERLAY_NEEDS_PHYSICAL(overlay->dev))
-               error->base = (__force long)overlay->reg_bo->phys_handle->vaddr;
-       else
-               error->base = i915_gem_obj_ggtt_offset(overlay->reg_bo);
+       error->base = overlay->flip_addr;
 
        regs = intel_overlay_map_regs_atomic(overlay);
        if (!regs)