[PATCH 3/4] drm/xe/display: Add init_clock_gating.h stubs

[Ville Syrjala <ville.syrjala@linux.intel.com>]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Add static inline stubs for init_clock_gating.h functions
so that we don't need ifdefs in the actual code. We already
have one in intel_display_power.c, and now I need to bring
over intel_display_reset.c.

Cc: Jouni Högander <jouni.hogander@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_power.c     |  2 --
 .../drm/xe/compat-i915-headers/intel_clock_gating.h    | 10 +++++++++-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 8a7afe2a94bc..80ecf373fb19 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -1420,9 +1420,7 @@ static void hsw_disable_pc8(struct intel_display *display)
 	intel_init_pch_refclk(display);
 
 	/* Many display registers don't survive PC8+ */
-#ifdef I915 /* FIXME */
 	intel_clock_gating_init(display->drm);
-#endif
 }
 
 static void intel_pch_reset_handshake(struct intel_display *display,
diff --git a/drivers/gpu/drm/xe/compat-i915-headers/intel_clock_gating.h b/drivers/gpu/drm/xe/compat-i915-headers/intel_clock_gating.h
index ce986f0e8f38..552975a30ba2 100644
--- a/drivers/gpu/drm/xe/compat-i915-headers/intel_clock_gating.h
+++ b/drivers/gpu/drm/xe/compat-i915-headers/intel_clock_gating.h
@@ -3,4 +3,12 @@
  * Copyright © 2023 Intel Corporation
  */
 
-#include "../../i915/intel_clock_gating.h"
+#ifndef __INTEL_CLOCK_GATING_H__
+#define __INTEL_CLOCK_GATING_H__
+
+struct drm_device;
+
+static inline void intel_clock_gating_init(struct drm_device *drm) {}
+static inline void intel_clock_gating_hooks_init(struct drm_device *drm) {}
+
+#endif /* __INTEL_CLOCK_GATING_H__ */
-- 
2.52.0