drm/msm/dpu: use kthread_destroy_worker to release msm workers

index 7d168cf..956f0599 100644
@@ -290,14 +290,12 @@ static int msm_drm_uninit(struct device *dev)
 	/* clean up display commit/event worker threads */
 	for (i = 0; i < priv->num_crtcs; i++) {
 		if (priv->disp_thread[i].thread) {
-			kthread_flush_worker(&priv->disp_thread[i].worker);
-			kthread_stop(priv->disp_thread[i].thread);
+			kthread_destroy_worker(&priv->disp_thread[i].worker);
 			priv->disp_thread[i].thread = NULL;
 		}
 
 		if (priv->event_thread[i].thread) {
-			kthread_flush_worker(&priv->event_thread[i].worker);
-			kthread_stop(priv->event_thread[i].thread);
+			kthread_destroy_worker(&priv->event_thread[i].worker);
 			priv->event_thread[i].thread = NULL;
 		}
 	}

index 956f0599..37740b8 100644
@@ -212,7 +212,7 @@ struct vblank_event {
 	bool enable;
 };
 
-static void vblank_ctrl_worker(struct kthread_work *work)
+static void vblank_ctrl_worker(struct work_struct *work)
 {
 	struct msm_vblank_ctrl *vbl_ctrl = container_of(work,
 						struct msm_vblank_ctrl, work);

@@ -260,8 +260,7 @@ static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
 	list_add_tail(&vbl_ev->node, &vbl_ctrl->event_list);
 	spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
 
-	kthread_queue_work(&priv->disp_thread[crtc_id].worker,
-			&vbl_ctrl->work);
+	queue_work(priv->wq, &vbl_ctrl->work);
 
 	return 0;
 }

@@ -281,7 +280,7 @@ static int msm_drm_uninit(struct device *dev)
 	 * work before drm_irq_uninstall() to avoid work re-enabling an
 	 * irq after uninstall has disabled it.
 	 */
-	kthread_flush_work(&vbl_ctrl->work);
+	flush_work(&vbl_ctrl->work);
 	list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) {
 		list_del(&vbl_ev->node);
 		kfree(vbl_ev);

@@ -479,7 +478,7 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
 
 	INIT_LIST_HEAD(&priv->inactive_list);
 	INIT_LIST_HEAD(&priv->vblank_ctrl.event_list);
-	kthread_init_work(&priv->vblank_ctrl.work, vblank_ctrl_worker);
+	INIT_WORK(&priv->vblank_ctrl.work, vblank_ctrl_worker);
 	spin_lock_init(&priv->vblank_ctrl.lock);
 
 	drm_mode_config_init(ddev);

index 71a03ce..0298fa7 100644
@@ -78,7 +78,7 @@ enum msm_mdp_plane_property {
 };
 
 struct msm_vblank_ctrl {
-	struct kthread_work work;
+	struct work_struct work;
 	struct list_head event_list;
 	spinlock_t lock;
 };

index 36158b7..3d1e1e4 100644
@@ -205,7 +205,7 @@ struct dpu_encoder_virt {
 	bool idle_pc_supported;
 	struct mutex rc_lock;
 	enum dpu_enc_rc_states rc_state;
-	struct kthread_delayed_work delayed_off_work;
+	struct delayed_work delayed_off_work;
 	struct kthread_work vsync_event_work;
 	struct msm_display_topology topology;
 	bool mode_set_complete;

@@ -742,7 +742,6 @@ static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
 {
 	struct dpu_encoder_virt *dpu_enc;
 	struct msm_drm_private *priv;
-	struct msm_drm_thread *disp_thread;
 	bool is_vid_mode = false;
 
 	if (!drm_enc || !drm_enc->dev || !drm_enc->dev->dev_private ||

@@ -755,12 +754,6 @@ static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
 	is_vid_mode = dpu_enc->disp_info.capabilities &
 						MSM_DISPLAY_CAP_VID_MODE;
 
-	if (drm_enc->crtc->index >= ARRAY_SIZE(priv->disp_thread)) {
-		DPU_ERROR("invalid crtc index\n");
-		return -EINVAL;
-	}
-	disp_thread = &priv->disp_thread[drm_enc->crtc->index];
-
 	/*
 	 * when idle_pc is not supported, process only KICKOFF, STOP and MODESET
 	 * events and return early for other events (ie wb display).

@@ -777,8 +770,7 @@ static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
 	switch (sw_event) {
 	case DPU_ENC_RC_EVENT_KICKOFF:
 		/* cancel delayed off work, if any */
-		if (kthread_cancel_delayed_work_sync(
-				&dpu_enc->delayed_off_work))
+		if (cancel_delayed_work_sync(&dpu_enc->delayed_off_work))
 			DPU_DEBUG_ENC(dpu_enc, "sw_event:%d, work cancelled\n",
 					sw_event);
 

@@ -837,10 +829,8 @@ static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
 			return 0;
 		}
 
-		kthread_queue_delayed_work(
-			&disp_thread->worker,
-			&dpu_enc->delayed_off_work,
-			msecs_to_jiffies(dpu_enc->idle_timeout));
+		queue_delayed_work(priv->wq, &dpu_enc->delayed_off_work,
+				   msecs_to_jiffies(dpu_enc->idle_timeout));
 
 		trace_dpu_enc_rc(DRMID(drm_enc), sw_event,
 				 dpu_enc->idle_pc_supported, dpu_enc->rc_state,

@@ -849,8 +839,7 @@ static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
 
 	case DPU_ENC_RC_EVENT_PRE_STOP:
 		/* cancel delayed off work, if any */
-		if (kthread_cancel_delayed_work_sync(
-				&dpu_enc->delayed_off_work))
+		if (cancel_delayed_work_sync(&dpu_enc->delayed_off_work))
 			DPU_DEBUG_ENC(dpu_enc, "sw_event:%d, work cancelled\n",
 					sw_event);
 

@@ -1368,7 +1357,7 @@ static void dpu_encoder_frame_done_callback(
 	}
 }
 
-static void dpu_encoder_off_work(struct kthread_work *work)
+static void dpu_encoder_off_work(struct work_struct *work)
 {
 	struct dpu_encoder_virt *dpu_enc = container_of(work,
 			struct dpu_encoder_virt, delayed_off_work.work);

@@ -2193,7 +2182,7 @@ int dpu_encoder_setup(struct drm_device *dev, struct drm_encoder *enc,
 
 
 	mutex_init(&dpu_enc->rc_lock);
-	kthread_init_delayed_work(&dpu_enc->delayed_off_work,
+	INIT_DELAYED_WORK(&dpu_enc->delayed_off_work,
 			dpu_encoder_off_work);
 	dpu_enc->idle_timeout = IDLE_TIMEOUT;
 

index 37740b8..1e9fec1 100644
@@ -286,13 +286,8 @@ static int msm_drm_uninit(struct device *dev)
 		kfree(vbl_ev);
 	}
 
-	/* clean up display commit/event worker threads */
+	/* clean up event worker threads */
 	for (i = 0; i < priv->num_crtcs; i++) {
-		if (priv->disp_thread[i].thread) {
-			kthread_destroy_worker(&priv->disp_thread[i].worker);
-			priv->disp_thread[i].thread = NULL;
-		}
-
 		if (priv->event_thread[i].thread) {
 			kthread_destroy_worker(&priv->event_thread[i].worker);
 			priv->event_thread[i].thread = NULL;

@@ -545,27 +540,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
 	 */
 	param.sched_priority = 16;
 	for (i = 0; i < priv->num_crtcs; i++) {
-
-		/* initialize display thread */
-		priv->disp_thread[i].crtc_id = priv->crtcs[i]->base.id;
-		kthread_init_worker(&priv->disp_thread[i].worker);
-		priv->disp_thread[i].dev = ddev;
-		priv->disp_thread[i].thread =
-			kthread_run(kthread_worker_fn,
-				&priv->disp_thread[i].worker,
-				"crtc_commit:%d", priv->disp_thread[i].crtc_id);
-		if (IS_ERR(priv->disp_thread[i].thread)) {
-			DRM_DEV_ERROR(dev, "failed to create crtc_commit kthread\n");
-			priv->disp_thread[i].thread = NULL;
-			goto err_msm_uninit;
-		}
-
-		ret = sched_setscheduler(priv->disp_thread[i].thread,
-					 SCHED_FIFO, &param);
-		if (ret)
-			dev_warn(dev, "disp_thread set priority failed: %d\n",
-				 ret);
-
 		/* initialize event thread */
 		priv->event_thread[i].crtc_id = priv->crtcs[i]->base.id;
 		kthread_init_worker(&priv->event_thread[i].worker);

@@ -580,13 +554,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
 			goto err_msm_uninit;
 		}
 
-		/**
-		 * event thread should also run at same priority as disp_thread
-		 * because it is handling frame_done events. A lower priority
-		 * event thread and higher priority disp_thread can causes
-		 * frame_pending counters beyond 2. This can lead to commit
-		 * failure at crtc commit level.
-		 */
 		ret = sched_setscheduler(priv->event_thread[i].thread,
 					 SCHED_FIFO, &param);
 		if (ret)

index 0298fa7..0307543 100644
@@ -197,7 +197,6 @@ struct msm_drm_private {
 	unsigned int num_crtcs;
 	struct drm_crtc *crtcs[MAX_CRTCS];
 
-	struct msm_drm_thread disp_thread[MAX_CRTCS];
 	struct msm_drm_thread event_thread[MAX_CRTCS];
 
 	unsigned int num_encoders;

index 1e9fec1..5f61fc4 100644
@@ -206,61 +206,44 @@ u32 msm_readl(const void __iomem *addr)
 	return val;
 }
 
-struct vblank_event {
-	struct list_head node;
+struct msm_vblank_work {
+	struct work_struct work;
 	int crtc_id;
 	bool enable;
+	struct msm_drm_private *priv;
 };
 
 static void vblank_ctrl_worker(struct work_struct *work)
 {
-	struct msm_vblank_ctrl *vbl_ctrl = container_of(work,
-						struct msm_vblank_ctrl, work);
-	struct msm_drm_private *priv = container_of(vbl_ctrl,
-					struct msm_drm_private, vblank_ctrl);
+	struct msm_vblank_work *vbl_work = container_of(work,
+						struct msm_vblank_work, work);
+	struct msm_drm_private *priv = vbl_work->priv;
 	struct msm_kms *kms = priv->kms;
-	struct vblank_event *vbl_ev, *tmp;
-	unsigned long flags;
-
-	spin_lock_irqsave(&vbl_ctrl->lock, flags);
-	list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) {
-		list_del(&vbl_ev->node);
-		spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
-
-		if (vbl_ev->enable)
-			kms->funcs->enable_vblank(kms,
-						priv->crtcs[vbl_ev->crtc_id]);
-		else
-			kms->funcs->disable_vblank(kms,
-						priv->crtcs[vbl_ev->crtc_id]);
-
-		kfree(vbl_ev);
 
-		spin_lock_irqsave(&vbl_ctrl->lock, flags);
-	}
+	if (vbl_work->enable)
+		kms->funcs->enable_vblank(kms, priv->crtcs[vbl_work->crtc_id]);
+	else
+		kms->funcs->disable_vblank(kms,	priv->crtcs[vbl_work->crtc_id]);
 
-	spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
+	kfree(vbl_work);
 }
 
 static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
 					int crtc_id, bool enable)
 {
-	struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl;
-	struct vblank_event *vbl_ev;
-	unsigned long flags;
+	struct msm_vblank_work *vbl_work;
 
-	vbl_ev = kzalloc(sizeof(*vbl_ev), GFP_ATOMIC);
-	if (!vbl_ev)
+	vbl_work = kzalloc(sizeof(*vbl_work), GFP_ATOMIC);
+	if (!vbl_work)
 		return -ENOMEM;
 
-	vbl_ev->crtc_id = crtc_id;
-	vbl_ev->enable = enable;
+	INIT_WORK(&vbl_work->work, vblank_ctrl_worker);
 
-	spin_lock_irqsave(&vbl_ctrl->lock, flags);
-	list_add_tail(&vbl_ev->node, &vbl_ctrl->event_list);
-	spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
+	vbl_work->crtc_id = crtc_id;
+	vbl_work->enable = enable;
+	vbl_work->priv = priv;
 
-	queue_work(priv->wq, &vbl_ctrl->work);
+	queue_work(priv->wq, &vbl_work->work);
 
 	return 0;
 }

@@ -272,19 +255,15 @@ static int msm_drm_uninit(struct device *dev)
 	struct msm_drm_private *priv = ddev->dev_private;
 	struct msm_kms *kms = priv->kms;
 	struct msm_mdss *mdss = priv->mdss;
-	struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl;
-	struct vblank_event *vbl_ev, *tmp;
 	int i;
 
 	/* We must cancel and cleanup any pending vblank enable/disable
 	 * work before drm_irq_uninstall() to avoid work re-enabling an
 	 * irq after uninstall has disabled it.
 	 */
-	flush_work(&vbl_ctrl->work);
-	list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) {
-		list_del(&vbl_ev->node);
-		kfree(vbl_ev);
-	}
+
+	flush_workqueue(priv->wq);
+	destroy_workqueue(priv->wq);
 
 	/* clean up event worker threads */
 	for (i = 0; i < priv->num_crtcs; i++) {

@@ -313,9 +292,6 @@ static int msm_drm_uninit(struct device *dev)
 	drm_irq_uninstall(ddev);
 	pm_runtime_put_sync(dev);
 
-	flush_workqueue(priv->wq);
-	destroy_workqueue(priv->wq);
-
 	if (kms && kms->funcs)
 		kms->funcs->destroy(kms);
 

@@ -472,9 +448,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
 	priv->wq = alloc_ordered_workqueue("msm", 0);
 
 	INIT_LIST_HEAD(&priv->inactive_list);
-	INIT_LIST_HEAD(&priv->vblank_ctrl.event_list);
-	INIT_WORK(&priv->vblank_ctrl.work, vblank_ctrl_worker);
-	spin_lock_init(&priv->vblank_ctrl.lock);
 
 	drm_mode_config_init(ddev);
 

index 0307543..f2373e9 100644
@@ -77,12 +77,6 @@ enum msm_mdp_plane_property {
 	PLANE_PROP_MAX_NUM
 };
 
-struct msm_vblank_ctrl {
-	struct work_struct work;
-	struct list_head event_list;
-	spinlock_t lock;
-};
-
 #define MSM_GPU_MAX_RINGS 4
 #define MAX_H_TILES_PER_DISPLAY 2
 

@@ -225,7 +219,6 @@ struct msm_drm_private {
 	struct notifier_block vmap_notifier;
 	struct shrinker shrinker;
 
-	struct msm_vblank_ctrl vblank_ctrl;
 	struct drm_atomic_state *pm_state;
 };