sna: Try to reduce ping-pong migration for intermixed render/legacy code paths

References: https://bugs.freedesktop.org/show_bug.cgi?id=56591
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/sna/sna_render_inline.h b/src/sna/sna_render_inline.h
index 750faf54..2468b891 100644
--- a/src/sna/sna_render_inline.h
+++ b/src/sna/sna_render_inline.h
@@ -220,4 +220,23 @@ color_convert(uint32_t pixel,
 	return pixel;
 }
 
+inline static bool dst_use_gpu(PixmapPtr pixmap)
+{
+	struct sna_pixmap *priv = sna_pixmap(pixmap);
+	if (priv == NULL)
+		return false;
+
+	if (priv->gpu_damage && !priv->clear &&
+	    (!priv->cpu || !priv->cpu_damage || kgem_bo_is_busy(priv->gpu_bo)))
+		return true;
+
+	return priv->cpu_bo && kgem_bo_is_busy(priv->cpu_bo);
+}
+
+inline static bool dst_is_cpu(PixmapPtr pixmap)
+{
+	struct sna_pixmap *priv = sna_pixmap(pixmap);
+	return priv == NULL || DAMAGE_IS_ALL(priv->cpu_damage);
+}
+
 #endif /* SNA_RENDER_INLINE_H */