[Intel-xe] [RFC PATCH v2 16/23] drm/i915: Add function to clear scanout flag for vmas

[Jouni Högander]

Currently frontbuffer tracking code is directly clearing scanout
flag. This is not possible if we want to use frontbuffer tracking for
Xe. Add function to clear scanout flag for vmas which can be called by
frontbuffer tracking code and allows differing implementation for Xe.

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 drivers/gpu/drm/i915/i915_vma.c | 20 ++++++++++++++++++++
 drivers/gpu/drm/i915/i915_vma.h |  2 ++
 2 files changed, 22 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 7baaf999f1d6..2b32991d04ad 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -1629,6 +1629,26 @@ int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
 	return err;
 }
 
+/**
+ * i915_ggtt_clear_scanout - Clear scanout flag for all objects ggtt vmas
+ *
+ * This function clears scanout flags for objects ggtt vmas. These flags are set
+ * when object is pinned for display use and this function to clear them all is
+ * targeted to be called by frontbuffer tracking code when the frontbuffer is
+ * about to be released.
+ */
+void i915_ggtt_clear_scanout(struct drm_i915_gem_object *obj)
+{
+	struct i915_vma *vma;
+
+	spin_lock(&obj->vma.lock);
+	for_each_ggtt_vma(vma, obj) {
+		i915_vma_clear_scanout(vma);
+		vma->display_alignment = I915_GTT_MIN_ALIGNMENT;
+	}
+	spin_unlock(&obj->vma.lock);
+}
+
 static void __vma_close(struct i915_vma *vma, struct intel_gt *gt)
 {
 	/*
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index ed5c9d682a1b..e8fa9e0c57ee 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -435,6 +435,8 @@ static inline void i915_vma_clear_scanout(struct i915_vma *vma)
 	clear_bit(I915_VMA_SCANOUT_BIT, __i915_vma_flags(vma));
 }
 
+void i915_ggtt_clear_scanout(struct drm_i915_gem_object *obj);
+
 #define for_each_until(cond) if (cond) break; else
 
 /**
-- 
2.34.1