drm/i915/display: Use display parent interface for i915 runtime pm

Start using display parent interface for i915 runtime pm. Doing the same
for xe is done in coming changes.

v3:
  - remove useless include
v2:
  - use <> when including drm/intel/display_parent_interface.h
  - drop checks for validity of rpm function pointers

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://patch.msgid.link/20251030202836.1815680-6-jouni.hogander@intel.com

Author: hogander

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

@@ -1,69 +1,62 @@
 // SPDX-License-Identifier: MIT
 /* Copyright © 2025 Intel Corporation */
 
-#include "i915_drv.h"
+#include <drm/intel/display_parent_interface.h>
+
 #include "intel_display_core.h"
 #include "intel_display_rpm.h"
-#include "intel_runtime_pm.h"
-
-static struct intel_runtime_pm *display_to_rpm(struct intel_display *display)
-{
-	struct drm_i915_private *i915 = to_i915(display->drm);
-
-	return &i915->runtime_pm;
-}
 
 struct ref_tracker *intel_display_rpm_get_raw(struct intel_display *display)
 {
-	return intel_runtime_pm_get_raw(display_to_rpm(display));
+	return display->parent->rpm->get_raw(display->drm);
 }
 
 void intel_display_rpm_put_raw(struct intel_display *display, struct ref_tracker *wakeref)
 {
-	intel_runtime_pm_put_raw(display_to_rpm(display), wakeref);
+	display->parent->rpm->put_raw(display->drm, wakeref);
 }
 
 struct ref_tracker *intel_display_rpm_get(struct intel_display *display)
 {
-	return intel_runtime_pm_get(display_to_rpm(display));
+	return display->parent->rpm->get(display->drm);
 }
 
 struct ref_tracker *intel_display_rpm_get_if_in_use(struct intel_display *display)
 {
-	return intel_runtime_pm_get_if_in_use(display_to_rpm(display));
+	return display->parent->rpm->get_if_in_use(display->drm);
 }
 
 struct ref_tracker *intel_display_rpm_get_noresume(struct intel_display *display)
 {
-	return intel_runtime_pm_get_noresume(display_to_rpm(display));
+	return display->parent->rpm->get_noresume(display->drm);
 }
 
 void intel_display_rpm_put(struct intel_display *display, struct ref_tracker *wakeref)
 {
-	intel_runtime_pm_put(display_to_rpm(display), wakeref);
+	display->parent->rpm->put(display->drm, wakeref);
 }
 
 void intel_display_rpm_put_unchecked(struct intel_display *display)
 {
-	intel_runtime_pm_put_unchecked(display_to_rpm(display));
+	display->parent->rpm->put_unchecked(display->drm);
 }
 
 bool intel_display_rpm_suspended(struct intel_display *display)
 {
-	return intel_runtime_pm_suspended(display_to_rpm(display));
+	return display->parent->rpm->suspended(display->drm);
 }
 
 void assert_display_rpm_held(struct intel_display *display)
 {
-	assert_rpm_wakelock_held(display_to_rpm(display));
+	display->parent->rpm->assert_held(display->drm);
 }
 
 void intel_display_rpm_assert_block(struct intel_display *display)
 {
-	disable_rpm_wakeref_asserts(display_to_rpm(display));
+	display->parent->rpm->assert_block(display->drm);
 }
 
 void intel_display_rpm_assert_unblock(struct intel_display *display)
 {
-	enable_rpm_wakeref_asserts(display_to_rpm(display));
+	display->parent->rpm->assert_unblock(display->drm);
 }