drm/i915: move fb_tracking under display sub-struct

Move display frontbuffer tracking related members under drm_i915_private
display sub-struct.

Rename struct i915_frontbuffer_tracking to intel_frontbuffer_tracking
while at it.

FIXME: fb_tracking.lock mutex init should be moved away from
i915_gem_init_early().
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/a5444d0a373afca46da9a2f6e4db442af21b429b.1661779055.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_display_core.h

@@ -120,6 +120,17 @@ struct intel_dpll {
 	} ref_clks;
 };
 
+struct intel_frontbuffer_tracking {
+	spinlock_t lock;
+
+	/*
+	 * Tracking bits for delayed frontbuffer flushing du to gpu activity or
+	 * scheduled flips.
+	 */
+	unsigned busy_bits;
+	unsigned flip_bits;
+};
+
 struct intel_hotplug {
 	struct delayed_work hotplug_work;
 
@@ -363,6 +374,7 @@ struct intel_display {
 	struct intel_dmc dmc;
 	struct intel_dpll dpll;
 	struct intel_fbc *fbc[I915_MAX_FBCS];
+	struct intel_frontbuffer_tracking fb_tracking;
 	struct intel_hotplug hotplug;
 	struct intel_opregion opregion;
 	struct intel_overlay *overlay;

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

@@ -37,10 +37,10 @@ static int i915_frontbuffer_tracking(struct seq_file *m, void *unused)
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
 
 	seq_printf(m, "FB tracking busy bits: 0x%08x\n",
-		   dev_priv->fb_tracking.busy_bits);
+		   dev_priv->display.fb_tracking.busy_bits);
 
 	seq_printf(m, "FB tracking flip bits: 0x%08x\n",
-		   dev_priv->fb_tracking.flip_bits);
+		   dev_priv->display.fb_tracking.flip_bits);
 
 	return 0;
 }

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

@@ -81,9 +81,9 @@ static void frontbuffer_flush(struct drm_i915_private *i915,
 			      enum fb_op_origin origin)
 {
 	/* Delay flushing when rings are still busy.*/
-	spin_lock(&i915->fb_tracking.lock);
-	frontbuffer_bits &= ~i915->fb_tracking.busy_bits;
-	spin_unlock(&i915->fb_tracking.lock);
+	spin_lock(&i915->display.fb_tracking.lock);
+	frontbuffer_bits &= ~i915->display.fb_tracking.busy_bits;
+	spin_unlock(&i915->display.fb_tracking.lock);
 
 	if (!frontbuffer_bits)
 		return;
@@ -111,11 +111,11 @@ static void frontbuffer_flush(struct drm_i915_private *i915,
 void intel_frontbuffer_flip_prepare(struct drm_i915_private *i915,
 				    unsigned frontbuffer_bits)
 {
-	spin_lock(&i915->fb_tracking.lock);
-	i915->fb_tracking.flip_bits |= frontbuffer_bits;
+	spin_lock(&i915->display.fb_tracking.lock);
+	i915->display.fb_tracking.flip_bits |= frontbuffer_bits;
 	/* Remove stale busy bits due to the old buffer. */
-	i915->fb_tracking.busy_bits &= ~frontbuffer_bits;
-	spin_unlock(&i915->fb_tracking.lock);
+	i915->display.fb_tracking.busy_bits &= ~frontbuffer_bits;
+	spin_unlock(&i915->display.fb_tracking.lock);
 }
 
 /**
@@ -131,11 +131,11 @@ void intel_frontbuffer_flip_prepare(struct drm_i915_private *i915,
 void intel_frontbuffer_flip_complete(struct drm_i915_private *i915,
 				     unsigned frontbuffer_bits)
 {
-	spin_lock(&i915->fb_tracking.lock);
+	spin_lock(&i915->display.fb_tracking.lock);
 	/* Mask any cancelled flips. */
-	frontbuffer_bits &= i915->fb_tracking.flip_bits;
-	i915->fb_tracking.flip_bits &= ~frontbuffer_bits;
-	spin_unlock(&i915->fb_tracking.lock);
+	frontbuffer_bits &= i915->display.fb_tracking.flip_bits;
+	i915->display.fb_tracking.flip_bits &= ~frontbuffer_bits;
+	spin_unlock(&i915->display.fb_tracking.lock);
 
 	if (frontbuffer_bits)
 		frontbuffer_flush(i915, frontbuffer_bits, ORIGIN_FLIP);
@@ -155,10 +155,10 @@ void intel_frontbuffer_flip_complete(struct drm_i915_private *i915,
 void intel_frontbuffer_flip(struct drm_i915_private *i915,
 			    unsigned frontbuffer_bits)
 {
-	spin_lock(&i915->fb_tracking.lock);
+	spin_lock(&i915->display.fb_tracking.lock);
 	/* Remove stale busy bits due to the old buffer. */
-	i915->fb_tracking.busy_bits &= ~frontbuffer_bits;
-	spin_unlock(&i915->fb_tracking.lock);
+	i915->display.fb_tracking.busy_bits &= ~frontbuffer_bits;
+	spin_unlock(&i915->display.fb_tracking.lock);
 
 	frontbuffer_flush(i915, frontbuffer_bits, ORIGIN_FLIP);
 }
@@ -170,10 +170,10 @@ void __intel_fb_invalidate(struct intel_frontbuffer *front,
 	struct drm_i915_private *i915 = to_i915(front->obj->base.dev);
 
 	if (origin == ORIGIN_CS) {
-		spin_lock(&i915->fb_tracking.lock);
-		i915->fb_tracking.busy_bits |= frontbuffer_bits;
-		i915->fb_tracking.flip_bits &= ~frontbuffer_bits;
-		spin_unlock(&i915->fb_tracking.lock);
+		spin_lock(&i915->display.fb_tracking.lock);
+		i915->display.fb_tracking.busy_bits |= frontbuffer_bits;
+		i915->display.fb_tracking.flip_bits &= ~frontbuffer_bits;
+		spin_unlock(&i915->display.fb_tracking.lock);
 	}
 
 	trace_intel_frontbuffer_invalidate(frontbuffer_bits, origin);
@@ -191,11 +191,11 @@ void __intel_fb_flush(struct intel_frontbuffer *front,
 	struct drm_i915_private *i915 = to_i915(front->obj->base.dev);
 
 	if (origin == ORIGIN_CS) {
-		spin_lock(&i915->fb_tracking.lock);
+		spin_lock(&i915->display.fb_tracking.lock);
 		/* Filter out new bits since rendering started. */
-		frontbuffer_bits &= i915->fb_tracking.busy_bits;
-		i915->fb_tracking.busy_bits &= ~frontbuffer_bits;
-		spin_unlock(&i915->fb_tracking.lock);
+		frontbuffer_bits &= i915->display.fb_tracking.busy_bits;
+		i915->display.fb_tracking.busy_bits &= ~frontbuffer_bits;
+		spin_unlock(&i915->display.fb_tracking.lock);
 	}
 
 	if (frontbuffer_bits)
@@ -221,7 +221,7 @@ static void frontbuffer_retire(struct i915_active *ref)
 }
 
 static void frontbuffer_release(struct kref *ref)
-	__releases(&to_i915(front->obj->base.dev)->fb_tracking.lock)
+	__releases(&to_i915(front->obj->base.dev)->display.fb_tracking.lock)
 {
 	struct intel_frontbuffer *front =
 		container_of(ref, typeof(*front), ref);
@@ -238,7 +238,7 @@ static void frontbuffer_release(struct kref *ref)
 	spin_unlock(&obj->vma.lock);
 
 	RCU_INIT_POINTER(obj->frontbuffer, NULL);
-	spin_unlock(&to_i915(obj->base.dev)->fb_tracking.lock);
+	spin_unlock(&to_i915(obj->base.dev)->display.fb_tracking.lock);
 
 	i915_active_fini(&front->write);
 
@@ -268,7 +268,7 @@ intel_frontbuffer_get(struct drm_i915_gem_object *obj)
 			 frontbuffer_retire,
 			 I915_ACTIVE_RETIRE_SLEEPS);
 
-	spin_lock(&i915->fb_tracking.lock);
+	spin_lock(&i915->display.fb_tracking.lock);
 	if (rcu_access_pointer(obj->frontbuffer)) {
 		kfree(front);
 		front = rcu_dereference_protected(obj->frontbuffer, true);
@@ -277,7 +277,7 @@ intel_frontbuffer_get(struct drm_i915_gem_object *obj)
 		i915_gem_object_get(obj);
 		rcu_assign_pointer(obj->frontbuffer, front);
 	}
-	spin_unlock(&i915->fb_tracking.lock);
+	spin_unlock(&i915->display.fb_tracking.lock);
 
 	return front;
 }
@@ -286,7 +286,7 @@ void intel_frontbuffer_put(struct intel_frontbuffer *front)
 {
 	kref_put_lock(&front->ref,
 		      frontbuffer_release,
-		      &to_i915(front->obj->base.dev)->fb_tracking.lock);
+		      &to_i915(front->obj->base.dev)->display.fb_tracking.lock);
 }
 
 /**

drivers/gpu/drm/i915/i915_drv.h

@@ -39,7 +39,6 @@
 #include "display/intel_display.h"
 #include "display/intel_display_core.h"
 #include "display/intel_dsb.h"
-#include "display/intel_frontbuffer.h"
 
 #include "gem/i915_gem_context_types.h"
 #include "gem/i915_gem_lmem.h"
@@ -188,17 +187,6 @@ i915_fence_timeout(const struct drm_i915_private *i915)
 
 #define HAS_HW_SAGV_WM(i915) (DISPLAY_VER(i915) >= 13 && !IS_DGFX(i915))
 
-struct i915_frontbuffer_tracking {
-	spinlock_t lock;
-
-	/*
-	 * Tracking bits for delayed frontbuffer flushing du to gpu activity or
-	 * scheduled flips.
-	 */
-	unsigned busy_bits;
-	unsigned flip_bits;
-};
-
 struct i915_virtual_gpu {
 	struct mutex lock; /* serialises sending of g2v_notify command pkts */
 	bool active;
@@ -333,8 +321,6 @@ struct drm_i915_private {
 
 	struct list_head global_obj_list;
 
-	struct i915_frontbuffer_tracking fb_tracking;
-
 	struct intel_atomic_helper {
 		struct llist_head free_list;
 		struct work_struct free_work;

drivers/gpu/drm/i915/i915_gem.c

@@ -1212,7 +1212,7 @@ void i915_gem_init_early(struct drm_i915_private *dev_priv)
 	i915_gem_init__mm(dev_priv);
 	i915_gem_init__contexts(dev_priv);
 
-	spin_lock_init(&dev_priv->fb_tracking.lock);
+	spin_lock_init(&dev_priv->display.fb_tracking.lock);
 }
 
 void i915_gem_cleanup_early(struct drm_i915_private *dev_priv)