drm/xe/compat: refactor compat i915_drv.h

The compat i915_drv.h contains things that aren't there in the original
i915_drv.h. Split out gem/i915_gem_object.h and i915_scheduler_types.h,
moving the corresponding pieces out, including FORCEWAKE_ALL to
intel_uncore.h.

Technically I915_PRIORITY_DISPLAY should be in i915_priolist_types.h,
but it's a bit overkill to split out another file just for
that. i915_scheduler_types.h shall do.

With this, the compat i915_drv.h becomes a strict subset of the
original.

Reviewed-by: Nemesa Garg <nemesa.garg@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/d6bd95bf52aa37f48ddec3e675b7a3cc66829eef.1741192597.git.jani.nikula@intel.com
[Jani: fix i915_gem_object.h header guard while applying]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Author: jnikula

drivers/gpu/drm/i915/display/intel_atomic_plane.c

@@ -41,8 +41,10 @@
 #include <drm/drm_gem.h>
 #include <drm/drm_gem_atomic_helper.h>
 
+#include "gem/i915_gem_object.h"
 #include "i915_config.h"
 #include "i915_drv.h"
+#include "i915_scheduler_types.h"
 #include "i915_vma.h"
 #include "i9xx_plane_regs.h"
 #include "intel_atomic_plane.h"

drivers/gpu/drm/xe/compat-i915-headers/gem/i915_gem_object.h

@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: MIT */
+/* Copyright © 2025 Intel Corporation */
+
+#ifndef __I915_GEM_OBJECT_H__
+#define __I915_GEM_OBJECT_H__
+
+struct dma_fence;
+struct i915_sched_attr;
+
+static inline void i915_gem_fence_wait_priority(struct dma_fence *fence,
+						const struct i915_sched_attr *attr)
+{
+}
+
+#endif

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

@@ -95,14 +95,6 @@ static inline struct drm_i915_private *to_i915(const struct drm_device *dev)
 
 #define HAS_128_BYTE_Y_TILING(xe) (xe || 1)
 
-#define I915_PRIORITY_DISPLAY 0
-struct i915_sched_attr {
-	int priority;
-};
-#define i915_gem_fence_wait_priority(fence, attr) do { (void) attr; } while (0)
-
-#define FORCEWAKE_ALL XE_FORCEWAKE_ALL
-
 #ifdef CONFIG_ARM64
 /*
  * arm64 indirectly includes linux/rtc.h,

drivers/gpu/drm/xe/compat-i915-headers/i915_scheduler_types.h

@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: MIT */
+/* Copyright © 2025 Intel Corporation */
+
+#ifndef __I915_SCHEDULER_TYPES_H__
+#define __I915_SCHEDULER_TYPES_H__
+
+#define I915_PRIORITY_DISPLAY 0
+
+struct i915_sched_attr {
+	int priority;
+};
+
+#endif

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

@@ -10,6 +10,8 @@
 #include "xe_device_types.h"
 #include "xe_mmio.h"
 
+#define FORCEWAKE_ALL XE_FORCEWAKE_ALL
+
 static inline struct intel_uncore *to_intel_uncore(struct drm_device *drm)
 {
 	return &to_xe_device(drm)->uncore;