drm/i915/display: add display specific runtime PM wrappers

Add display specific wrappers around the i915 and xe dedicated runtime
PM interfaces. There are no conversions here, just the wrappers.

Implement with_intel_display_rpm() without needing to provide a local
variable, which neatly narrows the scope and hides the type of the
wakeref cookie.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/086b312367fa0fbd8de92e9764117aa7ff4a8cc5.1742483007.git.jani.nikula@intel.com

5 files changed, 178 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index ed05b131ed3a..c8fc271b33b7 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -247,6 +247,7 @@ i915-y += \
 	display/intel_display_power_map.o \
 	display/intel_display_power_well.o \
 	display/intel_display_reset.o \
+	display/intel_display_rpm.o \
 	display/intel_display_rps.o \
 	display/intel_display_snapshot.o \
 	display/intel_display_wa.o \
diff --git a/drivers/gpu/drm/i915/display/intel_display_rpm.c b/drivers/gpu/drm/i915/display/intel_display_rpm.c
new file mode 100644
index 000000000000..48da67dd0136
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_display_rpm.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: MIT
+/* Copyright © 2025 Intel Corporation */
+
+#include "i915_drv.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));
+}
+
+void intel_display_rpm_put_raw(struct intel_display *display, struct ref_tracker *wakeref)
+{
+	intel_runtime_pm_put_raw(display_to_rpm(display), wakeref);
+}
+
+struct ref_tracker *intel_display_rpm_get(struct intel_display *display)
+{
+	return intel_runtime_pm_get(display_to_rpm(display));
+}
+
+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));
+}
+
+struct ref_tracker *intel_display_rpm_get_noresume(struct intel_display *display)
+{
+	return intel_runtime_pm_get_noresume(display_to_rpm(display));
+}
+
+void intel_display_rpm_put(struct intel_display *display, struct ref_tracker *wakeref)
+{
+	intel_runtime_pm_put(display_to_rpm(display), wakeref);
+}
+
+void intel_display_rpm_put_unchecked(struct intel_display *display)
+{
+	intel_runtime_pm_put_unchecked(display_to_rpm(display));
+}
+
+bool intel_display_rpm_suspended(struct intel_display *display)
+{
+	return intel_runtime_pm_suspended(display_to_rpm(display));
+}
+
+void assert_display_rpm_held(struct intel_display *display)
+{
+	assert_rpm_wakelock_held(display_to_rpm(display));
+}
+
+void intel_display_rpm_assert_block(struct intel_display *display)
+{
+	disable_rpm_wakeref_asserts(display_to_rpm(display));
+}
+
+void intel_display_rpm_assert_unblock(struct intel_display *display)
+{
+	enable_rpm_wakeref_asserts(display_to_rpm(display));
+}
diff --git a/drivers/gpu/drm/i915/display/intel_display_rpm.h b/drivers/gpu/drm/i915/display/intel_display_rpm.h
new file mode 100644
index 000000000000..6ef48515f84b
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_display_rpm.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: MIT */
+/* Copyright © 2025 Intel Corporation */
+
+#ifndef __INTEL_DISPLAY_RPM__
+#define __INTEL_DISPLAY_RPM__
+
+#include <linux/types.h>
+
+struct intel_display;
+struct ref_tracker;
+
+struct ref_tracker *intel_display_rpm_get(struct intel_display *display);
+void intel_display_rpm_put(struct intel_display *display, struct ref_tracker *wakeref);
+
+#define __with_intel_display_rpm(__display, __wakeref) \
+	for (struct ref_tracker *(__wakeref) = intel_display_rpm_get(__display); (__wakeref); \
+	     intel_display_rpm_put((__display), (__wakeref)), (__wakeref) = NULL)
+
+#define with_intel_display_rpm(__display) \
+	__with_intel_display_rpm((__display), __UNIQUE_ID(wakeref))
+
+/* Only for special cases. */
+bool intel_display_rpm_suspended(struct intel_display *display);
+
+void assert_display_rpm_held(struct intel_display *display);
+void intel_display_rpm_assert_block(struct intel_display *display);
+void intel_display_rpm_assert_unblock(struct intel_display *display);
+
+/* Only for display power implementation. */
+struct ref_tracker *intel_display_rpm_get_raw(struct intel_display *display);
+void intel_display_rpm_put_raw(struct intel_display *display, struct ref_tracker *wakeref);
+
+struct ref_tracker *intel_display_rpm_get_if_in_use(struct intel_display *display);
+struct ref_tracker *intel_display_rpm_get_noresume(struct intel_display *display);
+void intel_display_rpm_put_unchecked(struct intel_display *display);
+
+#endif /* __INTEL_DISPLAY_RPM__ */
diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index 5ce65ccb3c08..4a99568605bd 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -181,6 +181,7 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \
 	display/intel_fbdev_fb.o \
 	display/xe_display.o \
 	display/xe_display_misc.o \
+	display/xe_display_rpm.o \
 	display/xe_display_rps.o \
 	display/xe_display_wa.o \
 	display/xe_dsb_buffer.o \
diff --git a/drivers/gpu/drm/xe/display/xe_display_rpm.c b/drivers/gpu/drm/xe/display/xe_display_rpm.c
new file mode 100644
index 000000000000..1955153aadba
--- /dev/null
+++ b/drivers/gpu/drm/xe/display/xe_display_rpm.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: MIT
+/* Copyright © 2025 Intel Corporation */
+
+#include "intel_display_rpm.h"
+#include "xe_device_types.h"
+#include "xe_pm.h"
+
+static struct xe_device *display_to_xe(struct intel_display *display)
+{
+	return container_of(display, struct xe_device, display);
+}
+
+struct ref_tracker *intel_display_rpm_get_raw(struct intel_display *display)
+{
+	return intel_display_rpm_get(display);
+}
+
+void intel_display_rpm_put_raw(struct intel_display *display, struct ref_tracker *wakeref)
+{
+	intel_display_rpm_put(display, wakeref);
+}
+
+struct ref_tracker *intel_display_rpm_get(struct intel_display *display)
+{
+	return xe_pm_runtime_resume_and_get(display_to_xe(display)) ? INTEL_WAKEREF_DEF : NULL;
+}
+
+struct ref_tracker *intel_display_rpm_get_if_in_use(struct intel_display *display)
+{
+	return xe_pm_runtime_get_if_in_use(display_to_xe(display)) ? INTEL_WAKEREF_DEF : NULL;
+}
+
+struct ref_tracker *intel_display_rpm_get_noresume(struct intel_display *display)
+{
+	xe_pm_runtime_get_noresume(display_to_xe(display));
+
+	return INTEL_WAKEREF_DEF;
+}
+
+void intel_display_rpm_put(struct intel_display *display, struct ref_tracker *wakeref)
+{
+	if (wakeref)
+		xe_pm_runtime_put(display_to_xe(display));
+}
+
+void intel_display_rpm_put_unchecked(struct intel_display *display)
+{
+	xe_pm_runtime_put(display_to_xe(display));
+}
+
+bool intel_display_rpm_suspended(struct intel_display *display)
+{
+	struct xe_device *xe = display_to_xe(display);
+
+	return pm_runtime_suspended(xe->drm.dev);
+}
+
+void assert_display_rpm_held(struct intel_display *display)
+{
+	/* FIXME */
+}
+
+void intel_display_rpm_assert_block(struct intel_display *display)
+{
+	/* FIXME */
+}
+
+void intel_display_rpm_assert_unblock(struct intel_display *display)
+{
+	/* FIXME */
+}