[PATCH 4/7] drm/i915: Helper function to determine GGTT view from plane state

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

For now only default implementation defaulting to normal view.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 81072c4..8157999 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2244,6 +2244,16 @@ intel_fb_align_height(struct drm_device *dev, unsigned int height,
 					       fb_format_modifier));
 }
 
+static
+int intel_fill_fb_ggtt_view(struct i915_ggtt_view *view,
+			    struct drm_framebuffer *fb,
+			    const struct drm_plane_state *plane_state)
+{
+	*view = i915_ggtt_view_normal;
+
+	return 0;
+}
+
 int
 intel_pin_and_fence_fb_obj(struct drm_plane *plane,
 			   struct drm_framebuffer *fb,
@@ -2253,6 +2263,7 @@ intel_pin_and_fence_fb_obj(struct drm_plane *plane,
 	struct drm_device *dev = fb->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+	struct i915_ggtt_view view;
 	u32 alignment;
 	int ret;
 
@@ -2289,6 +2300,10 @@ intel_pin_and_fence_fb_obj(struct drm_plane *plane,
 		return -EINVAL;
 	}
 
+	ret = intel_fill_fb_ggtt_view(&view, fb, plane_state);
+	if (ret < 0)
+		return ret;
+
 	/* Note that the w/a also requires 64 PTE of padding following the
 	 * bo. We currently fill all unused PTE with the shadow page and so
 	 * we should always have valid PTE following the scanout preventing
@@ -2308,7 +2323,7 @@ intel_pin_and_fence_fb_obj(struct drm_plane *plane,
 
 	dev_priv->mm.interruptible = false;
 	ret = i915_gem_object_pin_to_display_plane(obj, alignment, pipelined,
-						   &i915_ggtt_view_normal);
+						   &view);
 	if (ret)
 		goto err_interruptible;
 
@@ -2328,7 +2343,7 @@ intel_pin_and_fence_fb_obj(struct drm_plane *plane,
 	return 0;
 
 err_unpin:
-	i915_gem_object_unpin_from_display_plane(obj, &i915_ggtt_view_normal);
+	i915_gem_object_unpin_from_display_plane(obj, &view);
 err_interruptible:
 	dev_priv->mm.interruptible = true;
 	intel_runtime_pm_put(dev_priv);
@@ -2339,11 +2354,16 @@ static void intel_unpin_fb_obj(struct drm_framebuffer *fb,
 			       const struct drm_plane_state *plane_state)
 {
 	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+	struct i915_ggtt_view view;
+	int ret;
 
 	WARN_ON(!mutex_is_locked(&obj->base.dev->struct_mutex));
 
+	ret = intel_fill_fb_ggtt_view(&view, fb, plane_state);
+	WARN_ONCE(ret < 0, "Couldn't get view from plane state!");
+
 	i915_gem_object_unpin_fence(obj);
-	i915_gem_object_unpin_from_display_plane(obj, &i915_ggtt_view_normal);
+	i915_gem_object_unpin_from_display_plane(obj, &view);
 }
 
 /* Computes the linear offset to the base tile and adjusts x, y. bytes per pixel
-- 
2.3.0

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