drm/xe/display: Add Xe implementation for fence checks used by fbc code

Xe doesn't support legacy fences. Implement legacy fence and fence
id checks accordingly.

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/compat-i915-headers/i915_drv.h

@@ -24,6 +24,7 @@
 #include "i915_gpu_error.h"
 #include "i915_reg_defs.h"
 #include "i915_utils.h"
+#include "intel_gt_types.h"
 #include "intel_step.h"
 #include "intel_uc_fw.h"
 #include "intel_uncore.h"

drivers/gpu/drm/xe/compat-i915-headers/i915_vma.h

@@ -24,6 +24,8 @@ struct i915_vma {
 
 #define i915_ggtt_clear_scanout(bo) do { } while (0)
 
+#define i915_vma_fence_id(vma) -1
+
 static inline u32 i915_ggtt_offset(const struct i915_vma *vma)
 {
 	return vma->node.start;

drivers/gpu/drm/xe/compat-i915-headers/intel_gt_types.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#ifndef __INTEL_GT_TYPES__
+#define __INTEL_GT_TYPES__
+
+#define intel_gt_support_legacy_fencing(gt) 0
+
+#endif