drm/i915: add .fence_priority_display to parent interface

Add .fence_priority_display() to display parent interface, removing a
display dependency on gem/i915_gem_object.h.

This allows us to remove the xe compat gem/i915_gem_object.h.

v2: Don't mix this with the rps interface (Ville)

v3: Rebase

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/c7782862956e3aa59eaeb6dcf80906c1fc063ae1.1763370931.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

6 files changed, 20 insertions, 16 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_parent.c b/drivers/gpu/drm/i915/display/intel_parent.c
index 6c131196718e..27c7ef34ce48 100644
--- a/drivers/gpu/drm/i915/display/intel_parent.c
+++ b/drivers/gpu/drm/i915/display/intel_parent.c
@@ -64,3 +64,9 @@ bool intel_parent_has_fenced_regions(struct intel_display *display)
 {
 	return display->parent->has_fenced_regions && display->parent->has_fenced_regions(display->drm);
 }
+
+void intel_parent_fence_priority_display(struct intel_display *display, struct dma_fence *fence)
+{
+	if (display->parent->fence_priority_display)
+		display->parent->fence_priority_display(fence);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_parent.h b/drivers/gpu/drm/i915/display/intel_parent.h
index 12cfbea95aa1..a8ca40b57ea9 100644
--- a/drivers/gpu/drm/i915/display/intel_parent.h
+++ b/drivers/gpu/drm/i915/display/intel_parent.h
@@ -21,4 +21,6 @@ bool intel_parent_vgpu_active(struct intel_display *display);
 
 bool intel_parent_has_fenced_regions(struct intel_display *display);
 
+void intel_parent_fence_priority_display(struct intel_display *display, struct dma_fence *fence);
+
 #endif /* __INTEL_PARENT_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_plane.c b/drivers/gpu/drm/i915/display/intel_plane.c
index 5105e3278bc4..a7fec5ba6ac0 100644
--- a/drivers/gpu/drm/i915/display/intel_plane.c
+++ b/drivers/gpu/drm/i915/display/intel_plane.c
@@ -45,7 +45,6 @@
 #include <drm/drm_panic.h>
 #include <drm/drm_print.h>
 
-#include "gem/i915_gem_object.h"
 #include "i9xx_plane_regs.h"
 #include "intel_cdclk.h"
 #include "intel_cursor.h"
@@ -56,6 +55,7 @@
 #include "intel_fb_pin.h"
 #include "intel_fbdev.h"
 #include "intel_panic.h"
+#include "intel_parent.h"
 #include "intel_plane.h"
 #include "intel_psr.h"
 #include "skl_scaler.h"
@@ -1180,8 +1180,7 @@ intel_prepare_plane_fb(struct drm_plane *_plane,
 		goto unpin_fb;
 
 	if (new_plane_state->uapi.fence) {
-		i915_gem_fence_wait_priority_display(new_plane_state->uapi.fence);
-
+		intel_parent_fence_priority_display(display, new_plane_state->uapi.fence);
 		intel_display_rps_boost_after_vblank(new_plane_state->hw.crtc,
 						     new_plane_state->uapi.fence);
 	}
diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index 7e1dedabf0ee..7c60b6873934 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -750,12 +750,19 @@ static bool has_fenced_regions(struct drm_device *drm)
 	return intel_gt_support_legacy_fencing(to_gt(to_i915(drm)));
 }
 
+static void fence_priority_display(struct dma_fence *fence)
+{
+	if (dma_fence_is_i915(fence))
+		i915_gem_fence_wait_priority_display(fence);
+}
+
 static const struct intel_display_parent_interface parent = {
 	.rpm = &i915_display_rpm_interface,
 	.irq = &i915_display_irq_interface,
 	.rps = &i915_display_rps_interface,
 	.vgpu_active = vgpu_active,
 	.has_fenced_regions = has_fenced_regions,
+	.fence_priority_display = fence_priority_display,
 };
 
 const struct intel_display_parent_interface *i915_driver_parent_interface(void)
diff --git a/drivers/gpu/drm/xe/compat-i915-headers/gem/i915_gem_object.h b/drivers/gpu/drm/xe/compat-i915-headers/gem/i915_gem_object.h
deleted file mode 100644
index 0548b2e0316f..000000000000
--- a/drivers/gpu/drm/xe/compat-i915-headers/gem/i915_gem_object.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/* SPDX-License-Identifier: MIT */
-/* Copyright © 2025 Intel Corporation */
-
-#ifndef __I915_GEM_OBJECT_H__
-#define __I915_GEM_OBJECT_H__
-
-struct dma_fence;
-
-static inline void i915_gem_fence_wait_priority_display(struct dma_fence *fence)
-{
-}
-
-#endif
diff --git a/include/drm/intel/display_parent_interface.h b/include/drm/intel/display_parent_interface.h
index 0a6a26234fbe..4135d1e1a67e 100644
--- a/include/drm/intel/display_parent_interface.h
+++ b/include/drm/intel/display_parent_interface.h
@@ -64,6 +64,9 @@ struct intel_display_parent_interface {
 
 	/** @has_fenced_regions: Support legacy fencing? Optional. */
 	bool (*has_fenced_regions)(struct drm_device *drm);
+
+	/** @fence_priority_display: Set display priority. Optional. */
+	void (*fence_priority_display)(struct dma_fence *fence);
 };
 
 #endif