drm/i915/display: Remove dead code around intel_atomic_helper->free_list

After switching to directly using dma_fence instead of i915_sw_fence we
have left some dead code around intel_atomic_helper->free_list. Remove that
dead code.

v2: Remove intel_atomic_state->freed as well
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231114134141.2527694-1-jouni.hogander@intel.com

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

@@ -6974,24 +6974,6 @@ static void skl_commit_modeset_enables(struct intel_atomic_state *state)
 	drm_WARN_ON(&dev_priv->drm, update_pipes);
 }
 
-static void intel_atomic_helper_free_state(struct drm_i915_private *dev_priv)
-{
-	struct intel_atomic_state *state, *next;
-	struct llist_node *freed;
-
-	freed = llist_del_all(&dev_priv->display.atomic_helper.free_list);
-	llist_for_each_entry_safe(state, next, freed, freed)
-		drm_atomic_state_put(&state->base);
-}
-
-void intel_atomic_helper_free_state_worker(struct work_struct *work)
-{
-	struct drm_i915_private *dev_priv =
-		container_of(work, typeof(*dev_priv), display.atomic_helper.free_work);
-
-	intel_atomic_helper_free_state(dev_priv);
-}
-
 static void intel_atomic_commit_fence_wait(struct intel_atomic_state *intel_state)
 {
 	struct drm_i915_private *i915 = to_i915(intel_state->base.dev);
@@ -7027,8 +7009,6 @@ static void intel_atomic_cleanup_work(struct work_struct *work)
 	drm_atomic_helper_cleanup_planes(&i915->drm, &state->base);
 	drm_atomic_helper_commit_cleanup_done(&state->base);
 	drm_atomic_state_put(&state->base);
-
-	intel_atomic_helper_free_state(i915);
 }
 
 static void intel_atomic_prepare_plane_clear_colors(struct intel_atomic_state *state)

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

@@ -295,12 +295,6 @@ struct intel_display {
 		const struct intel_audio_funcs *audio;
 	} funcs;
 
-	/* Grouping using anonymous structs. Keep sorted. */
-	struct intel_atomic_helper {
-		struct llist_head free_list;
-		struct work_struct free_work;
-	} atomic_helper;
-
 	struct {
 		/* backlight registers and fields in struct intel_panel */
 		struct mutex lock;

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

@@ -259,10 +259,6 @@ int intel_display_driver_probe_noirq(struct drm_i915_private *i915)
 	if (ret)
 		goto cleanup_vga_client_pw_domain_dmc;
 
-	init_llist_head(&i915->display.atomic_helper.free_list);
-	INIT_WORK(&i915->display.atomic_helper.free_work,
-		  intel_atomic_helper_free_state_worker);
-
 	intel_init_quirks(i915);
 
 	intel_fbc_init(i915);
@@ -430,9 +426,6 @@ void intel_display_driver_remove(struct drm_i915_private *i915)
 	flush_workqueue(i915->display.wq.flip);
 	flush_workqueue(i915->display.wq.modeset);
 
-	flush_work(&i915->display.atomic_helper.free_work);
-	drm_WARN_ON(&i915->drm, !llist_empty(&i915->display.atomic_helper.free_list));
-
 	/*
 	 * MST topology needs to be suspended so we don't have any calls to
 	 * fbdev after it's finalized. MST will be destroyed later as part of

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

@@ -684,8 +684,6 @@ struct intel_atomic_state {
 	bool skip_intermediate_wm;
 
 	bool rps_interactive;
-
-	struct llist_node freed;
 };
 
 struct intel_plane_state {