Merge tag 'drm-misc-next-fixes-2019-09-23' of...

Merge tag 'drm-misc-next-fixes-2019-09-23' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

 - Multiple panfrost fixes for regulator support and page fault handling
 - Some cleanups and fixes in the self-refresh helpers
 - Some cleanups and fixes in the atomic helpers
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190923160946.nvaqiw5j7fpcdhc7@gilmour

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -5770,8 +5770,7 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
 		 * change FB pitch, DCC state, rotation or mirroing.
 		 */
 		bundle->flip_addrs[planes_count].flip_immediate =
-			(crtc->state->pageflip_flags &
-			 DRM_MODE_PAGE_FLIP_ASYNC) != 0 &&
+			crtc->state->async_flip &&
 			acrtc_state->update_type == UPDATE_TYPE_FAST;
 
 		timestamp_ns = ktime_get_ns();
@@ -6348,7 +6347,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 	amdgpu_dm_enable_crtc_interrupts(dev, state, true);
 
 	for_each_new_crtc_in_state(state, crtc, new_crtc_state, j)
-		if (new_crtc_state->pageflip_flags & DRM_MODE_PAGE_FLIP_ASYNC)
+		if (new_crtc_state->async_flip)
 			wait_for_vblank = false;
 
 	/* update planes when needed per crtc*/

drivers/gpu/drm/bridge/adv7511/adv7511_drv.c

@@ -874,6 +874,9 @@ static int adv7511_bridge_attach(struct drm_bridge *bridge)
 				 &adv7511_connector_helper_funcs);
 	drm_connector_attach_encoder(&adv->connector, bridge->encoder);
 
+	if (adv->type == ADV7533)
+		ret = adv7533_attach_dsi(adv);
+
 	if (adv->i2c_main->irq)
 		regmap_write(adv->regmap, ADV7511_REG_INT_ENABLE(0),
 			     ADV7511_INT0_HPD);
@@ -1219,17 +1222,8 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 	drm_bridge_add(&adv7511->bridge);
 
 	adv7511_audio_init(dev, adv7511);
-
-	if (adv7511->type == ADV7533) {
-		ret = adv7533_attach_dsi(adv7511);
-		if (ret)
-			goto err_remove_bridge;
-	}
-
 	return 0;
 
-err_remove_bridge:
-	drm_bridge_remove(&adv7511->bridge);
 err_unregister_cec:
 	i2c_unregister_device(adv7511->i2c_cec);
 	if (adv7511->cec_clk)

drivers/gpu/drm/drm_atomic_helper.c

@@ -26,6 +26,7 @@
  */
 
 #include <linux/dma-fence.h>
+#include <linux/ktime.h>
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
@@ -1580,9 +1581,23 @@ static void commit_tail(struct drm_atomic_state *old_state)
 {
 	struct drm_device *dev = old_state->dev;
 	const struct drm_mode_config_helper_funcs *funcs;
+	ktime_t start;
+	s64 commit_time_ms;
 
 	funcs = dev->mode_config.helper_private;
 
+	/*
+	 * We're measuring the _entire_ commit, so the time will vary depending
+	 * on how many fences and objects are involved. For the purposes of self
+	 * refresh, this is desirable since it'll give us an idea of how
+	 * congested things are. This will inform our decision on how often we
+	 * should enter self refresh after idle.
+	 *
+	 * These times will be averaged out in the self refresh helpers to avoid
+	 * overreacting over one outlier frame
+	 */
+	start = ktime_get();
+
 	drm_atomic_helper_wait_for_fences(dev, old_state, false);
 
 	drm_atomic_helper_wait_for_dependencies(old_state);
@@ -1592,6 +1607,11 @@ static void commit_tail(struct drm_atomic_state *old_state)
 	else
 		drm_atomic_helper_commit_tail(old_state);
 
+	commit_time_ms = ktime_ms_delta(ktime_get(), start);
+	if (commit_time_ms > 0)
+		drm_self_refresh_helper_update_avg_times(old_state,
+						 (unsigned long)commit_time_ms);
+
 	drm_atomic_helper_commit_cleanup_done(old_state);
 
 	drm_atomic_state_put(old_state);
@@ -3275,7 +3295,7 @@ static int page_flip_common(struct drm_atomic_state *state,
 		return PTR_ERR(crtc_state);
 
 	crtc_state->event = event;
-	crtc_state->pageflip_flags = flags;
+	crtc_state->async_flip = flags & DRM_MODE_PAGE_FLIP_ASYNC;
 
 	plane_state = drm_atomic_get_plane_state(state, plane);
 	if (IS_ERR(plane_state))

drivers/gpu/drm/drm_atomic_state_helper.c

@@ -128,7 +128,7 @@ void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
 	state->zpos_changed = false;
 	state->commit = NULL;
 	state->event = NULL;
-	state->pageflip_flags = 0;
+	state->async_flip = false;
 
 	/* Self refresh should be canceled when a new update is available */
 	state->active = drm_atomic_crtc_effectively_active(state);

drivers/gpu/drm/drm_atomic_uapi.c

@@ -1305,8 +1305,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev,
 	if (arg->reserved)
 		return -EINVAL;
 
-	if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
-			!dev->mode_config.async_page_flip)
+	if (arg->flags & DRM_MODE_PAGE_FLIP_ASYNC)
 		return -EINVAL;
 
 	/* can't test and expect an event at the same time. */

drivers/gpu/drm/drm_drv.c

@@ -976,14 +976,14 @@ int drm_dev_register(struct drm_device *dev, unsigned long flags)
 	if (ret)
 		goto err_minors;
 
+	dev->registered = true;
+
 	if (dev->driver->load) {
 		ret = dev->driver->load(dev, flags);
 		if (ret)
 			goto err_minors;
 	}
 
-	dev->registered = true;
-
 	if (drm_core_check_feature(dev, DRIVER_MODESET))
 		drm_modeset_register_all(dev);
 

drivers/gpu/drm/drm_ioctl.c

@@ -336,7 +336,12 @@ drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
 	case DRM_CLIENT_CAP_ATOMIC:
 		if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
 			return -EOPNOTSUPP;
-		if (req->value > 1)
+		/* The modesetting DDX has a totally broken idea of atomic. */
+		if (current->comm[0] == 'X' && req->value == 1) {
+			pr_info("broken atomic modeset userspace detected, disabling atomic\n");
+			return -EOPNOTSUPP;
+		}
+		if (req->value > 2)
 			return -EINVAL;
 		file_priv->atomic = req->value;
 		file_priv->universal_planes = req->value;

drivers/gpu/drm/drm_mode_object.c

@@ -42,7 +42,7 @@ int __drm_mode_object_add(struct drm_device *dev, struct drm_mode_object *obj,
 {
 	int ret;
 
-	WARN_ON(dev->registered && !obj_free_cb);
+	WARN_ON(!dev->driver->load && dev->registered && !obj_free_cb);
 
 	mutex_lock(&dev->mode_config.idr_mutex);
 	ret = idr_alloc(&dev->mode_config.object_idr, register_obj ? obj : NULL,
@@ -104,7 +104,7 @@ void drm_mode_object_register(struct drm_device *dev,
 void drm_mode_object_unregister(struct drm_device *dev,
 				struct drm_mode_object *object)
 {
-	WARN_ON(dev->registered && !object->free_cb);
+	WARN_ON(!dev->driver->load && dev->registered && !object->free_cb);
 
 	mutex_lock(&dev->mode_config.idr_mutex);
 	if (object->id) {

drivers/gpu/drm/drm_self_refresh_helper.c

@@ -5,6 +5,7 @@
  * Authors:
  * Sean Paul <seanpaul@chromium.org>
  */
+#include <linux/average.h>
 #include <linux/bitops.h>
 #include <linux/slab.h>
 #include <linux/workqueue.h>
@@ -50,11 +51,17 @@
  * atomic_check when &drm_crtc_state.self_refresh_active is true.
  */
 
+#define SELF_REFRESH_AVG_SEED_MS 200
+
+DECLARE_EWMA(psr_time, 4, 4)
+
 struct drm_self_refresh_data {
 	struct drm_crtc *crtc;
 	struct delayed_work entry_work;
-	struct drm_atomic_state *save_state;
-	unsigned int entry_delay_ms;
+
+	struct mutex avg_mutex;
+	struct ewma_psr_time entry_avg_ms;
+	struct ewma_psr_time exit_avg_ms;
 };
 
 static void drm_self_refresh_helper_entry_work(struct work_struct *work)
@@ -122,6 +129,44 @@ static void drm_self_refresh_helper_entry_work(struct work_struct *work)
 	drm_modeset_acquire_fini(&ctx);
 }
 
+/**
+ * drm_self_refresh_helper_update_avg_times - Updates a crtc's SR time averages
+ * @state: the state which has just been applied to hardware
+ * @commit_time_ms: the amount of time in ms that this commit took to complete
+ *
+ * Called after &drm_mode_config_funcs.atomic_commit_tail, this function will
+ * update the average entry/exit self refresh times on self refresh transitions.
+ * These averages will be used when calculating how long to delay before
+ * entering self refresh mode after activity.
+ */
+void drm_self_refresh_helper_update_avg_times(struct drm_atomic_state *state,
+					      unsigned int commit_time_ms)
+{
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
+	int i;
+
+	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state,
+				      new_crtc_state, i) {
+		struct drm_self_refresh_data *sr_data = crtc->self_refresh_data;
+		struct ewma_psr_time *time;
+
+		if (old_crtc_state->self_refresh_active ==
+		    new_crtc_state->self_refresh_active)
+			continue;
+
+		if (new_crtc_state->self_refresh_active)
+			time = &sr_data->entry_avg_ms;
+		else
+			time = &sr_data->exit_avg_ms;
+
+		mutex_lock(&sr_data->avg_mutex);
+		ewma_psr_time_add(time, commit_time_ms);
+		mutex_unlock(&sr_data->avg_mutex);
+	}
+}
+EXPORT_SYMBOL(drm_self_refresh_helper_update_avg_times);
+
 /**
  * drm_self_refresh_helper_alter_state - Alters the atomic state for SR exit
  * @state: the state currently being checked
@@ -153,6 +198,7 @@ void drm_self_refresh_helper_alter_state(struct drm_atomic_state *state)
 
 	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
 		struct drm_self_refresh_data *sr_data;
+		unsigned int delay;
 
 		/* Don't trigger the entry timer when we're already in SR */
 		if (crtc_state->self_refresh_active)
@@ -162,8 +208,13 @@ void drm_self_refresh_helper_alter_state(struct drm_atomic_state *state)
 		if (!sr_data)
 			continue;
 
+		mutex_lock(&sr_data->avg_mutex);
+		delay = (ewma_psr_time_read(&sr_data->entry_avg_ms) +
+			 ewma_psr_time_read(&sr_data->exit_avg_ms)) * 2;
+		mutex_unlock(&sr_data->avg_mutex);
+
 		mod_delayed_work(system_wq, &sr_data->entry_work,
-				 msecs_to_jiffies(sr_data->entry_delay_ms));
+				 msecs_to_jiffies(delay));
 	}
 }
 EXPORT_SYMBOL(drm_self_refresh_helper_alter_state);
@@ -171,12 +222,10 @@ EXPORT_SYMBOL(drm_self_refresh_helper_alter_state);
 /**
  * drm_self_refresh_helper_init - Initializes self refresh helpers for a crtc
  * @crtc: the crtc which supports self refresh supported displays
- * @entry_delay_ms: amount of inactivity to wait before entering self refresh
  *
  * Returns zero if successful or -errno on failure
  */
-int drm_self_refresh_helper_init(struct drm_crtc *crtc,
-				 unsigned int entry_delay_ms)
+int drm_self_refresh_helper_init(struct drm_crtc *crtc)
 {
 	struct drm_self_refresh_data *sr_data = crtc->self_refresh_data;
 
@@ -190,8 +239,18 @@ int drm_self_refresh_helper_init(struct drm_crtc *crtc,
 
 	INIT_DELAYED_WORK(&sr_data->entry_work,
 			  drm_self_refresh_helper_entry_work);
-	sr_data->entry_delay_ms = entry_delay_ms;
 	sr_data->crtc = crtc;
+	mutex_init(&sr_data->avg_mutex);
+	ewma_psr_time_init(&sr_data->entry_avg_ms);
+	ewma_psr_time_init(&sr_data->exit_avg_ms);
+
+	/*
+	 * Seed the averages so they're non-zero (and sufficiently large
+	 * for even poorly performing panels). As time goes on, this will be
+	 * averaged out and the values will trend to their true value.
+	 */
+	ewma_psr_time_add(&sr_data->entry_avg_ms, SELF_REFRESH_AVG_SEED_MS);
+	ewma_psr_time_add(&sr_data->exit_avg_ms, SELF_REFRESH_AVG_SEED_MS);
 
 	crtc->self_refresh_data = sr_data;
 	return 0;

drivers/gpu/drm/nouveau/dispnv50/wndw.c

@@ -267,7 +267,7 @@ nv50_wndw_atomic_check_acquire(struct nv50_wndw *wndw, bool modeset,
 			asyw->image.pitch[0] = fb->base.pitches[0];
 		}
 
-		if (!(asyh->state.pageflip_flags & DRM_MODE_PAGE_FLIP_ASYNC))
+		if (!asyh->state.async_flip)
 			asyw->image.interval = 1;
 		else
 			asyw->image.interval = 0;
@@ -383,7 +383,7 @@ nv50_wndw_atomic_check_lut(struct nv50_wndw *wndw,
 	}
 
 	/* Can't do an immediate flip while changing the LUT. */
-	asyh->state.pageflip_flags &= ~DRM_MODE_PAGE_FLIP_ASYNC;
+	asyh->state.async_flip = false;
 }
 
 static int

drivers/gpu/drm/panfrost/panfrost_devfreq.c

@@ -39,7 +39,7 @@ static int panfrost_devfreq_target(struct device *dev, unsigned long *freq,
 	 * If frequency scaling from low to high, adjust voltage first.
 	 * If frequency scaling from high to low, adjust frequency first.
 	 */
-	if (old_clk_rate < target_rate && pfdev->regulator) {
+	if (old_clk_rate < target_rate) {
 		err = regulator_set_voltage(pfdev->regulator, target_volt,
 					    target_volt);
 		if (err) {
@@ -53,14 +53,12 @@ static int panfrost_devfreq_target(struct device *dev, unsigned long *freq,
 	if (err) {
 		dev_err(dev, "Cannot set frequency %lu (%d)\n", target_rate,
 			err);
-		if (pfdev->regulator)
-			regulator_set_voltage(pfdev->regulator,
-					      pfdev->devfreq.cur_volt,
-					      pfdev->devfreq.cur_volt);
+		regulator_set_voltage(pfdev->regulator, pfdev->devfreq.cur_volt,
+				      pfdev->devfreq.cur_volt);
 		return err;
 	}
 
-	if (old_clk_rate > target_rate && pfdev->regulator) {
+	if (old_clk_rate > target_rate) {
 		err = regulator_set_voltage(pfdev->regulator, target_volt,
 					    target_volt);
 		if (err)

drivers/gpu/drm/panfrost/panfrost_device.c

@@ -89,12 +89,9 @@ static int panfrost_regulator_init(struct panfrost_device *pfdev)
 {
 	int ret;
 
-	pfdev->regulator = devm_regulator_get_optional(pfdev->dev, "mali");
+	pfdev->regulator = devm_regulator_get(pfdev->dev, "mali");
 	if (IS_ERR(pfdev->regulator)) {
 		ret = PTR_ERR(pfdev->regulator);
-		pfdev->regulator = NULL;
-		if (ret == -ENODEV)
-			return 0;
 		dev_err(pfdev->dev, "failed to get regulator: %d\n", ret);
 		return ret;
 	}
@@ -110,8 +107,7 @@ static int panfrost_regulator_init(struct panfrost_device *pfdev)
 
 static void panfrost_regulator_fini(struct panfrost_device *pfdev)
 {
-	if (pfdev->regulator)
-		regulator_disable(pfdev->regulator);
+	regulator_disable(pfdev->regulator);
 }
 
 int panfrost_device_init(struct panfrost_device *pfdev)

drivers/gpu/drm/panfrost/panfrost_mmu.c

@@ -386,28 +386,40 @@ void panfrost_mmu_pgtable_free(struct panfrost_file_priv *priv)
 	free_io_pgtable_ops(mmu->pgtbl_ops);
 }
 
-static struct drm_mm_node *addr_to_drm_mm_node(struct panfrost_device *pfdev, int as, u64 addr)
+static struct panfrost_gem_object *
+addr_to_drm_mm_node(struct panfrost_device *pfdev, int as, u64 addr)
 {
-	struct drm_mm_node *node = NULL;
+	struct panfrost_gem_object *bo = NULL;
+	struct panfrost_file_priv *priv;
+	struct drm_mm_node *node;
 	u64 offset = addr >> PAGE_SHIFT;
 	struct panfrost_mmu *mmu;
 
 	spin_lock(&pfdev->as_lock);
 	list_for_each_entry(mmu, &pfdev->as_lru_list, list) {
-		struct panfrost_file_priv *priv;
-		if (as != mmu->as)
-			continue;
+		if (as == mmu->as)
+			break;
+	}
+	if (as != mmu->as)
+		goto out;
+
+	priv = container_of(mmu, struct panfrost_file_priv, mmu);
 
-		priv = container_of(mmu, struct panfrost_file_priv, mmu);
-		drm_mm_for_each_node(node, &priv->mm) {
-			if (offset >= node->start && offset < (node->start + node->size))
-				goto out;
+	spin_lock(&priv->mm_lock);
+
+	drm_mm_for_each_node(node, &priv->mm) {
+		if (offset >= node->start &&
+		    offset < (node->start + node->size)) {
+			bo = drm_mm_node_to_panfrost_bo(node);
+			drm_gem_object_get(&bo->base.base);
+			break;
 		}
 	}
 
+	spin_unlock(&priv->mm_lock);
 out:
 	spin_unlock(&pfdev->as_lock);
-	return node;
+	return bo;
 }
 
 #define NUM_FAULT_PAGES (SZ_2M / PAGE_SIZE)
@@ -415,29 +427,28 @@ static struct drm_mm_node *addr_to_drm_mm_node(struct panfrost_device *pfdev, in
 int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as, u64 addr)
 {
 	int ret, i;
-	struct drm_mm_node *node;
 	struct panfrost_gem_object *bo;
 	struct address_space *mapping;
 	pgoff_t page_offset;
 	struct sg_table *sgt;
 	struct page **pages;
 
-	node = addr_to_drm_mm_node(pfdev, as, addr);
-	if (!node)
+	bo = addr_to_drm_mm_node(pfdev, as, addr);
+	if (!bo)
 		return -ENOENT;
 
-	bo = drm_mm_node_to_panfrost_bo(node);
 	if (!bo->is_heap) {
 		dev_WARN(pfdev->dev, "matching BO is not heap type (GPU VA = %llx)",
-			 node->start << PAGE_SHIFT);
-		return -EINVAL;
+			 bo->node.start << PAGE_SHIFT);
+		ret = -EINVAL;
+		goto err_bo;
 	}
 	WARN_ON(bo->mmu->as != as);
 
 	/* Assume 2MB alignment and size multiple */
 	addr &= ~((u64)SZ_2M - 1);
 	page_offset = addr >> PAGE_SHIFT;
-	page_offset -= node->start;
+	page_offset -= bo->node.start;
 
 	mutex_lock(&bo->base.pages_lock);
 
@@ -446,7 +457,8 @@ int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as, u64 addr)
 				     sizeof(struct sg_table), GFP_KERNEL | __GFP_ZERO);
 		if (!bo->sgts) {
 			mutex_unlock(&bo->base.pages_lock);
-			return -ENOMEM;
+			ret = -ENOMEM;
+			goto err_bo;
 		}
 
 		pages = kvmalloc_array(bo->base.base.size >> PAGE_SHIFT,
@@ -455,7 +467,8 @@ int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as, u64 addr)
 			kfree(bo->sgts);
 			bo->sgts = NULL;
 			mutex_unlock(&bo->base.pages_lock);
-			return -ENOMEM;
+			ret = -ENOMEM;
+			goto err_bo;
 		}
 		bo->base.pages = pages;
 		bo->base.pages_use_count = 1;
@@ -493,12 +506,16 @@ int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as, u64 addr)
 
 	dev_dbg(pfdev->dev, "mapped page fault @ AS%d %llx", as, addr);
 
+	drm_gem_object_put_unlocked(&bo->base.base);
+
 	return 0;
 
 err_map:
 	sg_free_table(sgt);
 err_pages:
 	drm_gem_shmem_put_pages(&bo->base);
+err_bo:
+	drm_gem_object_put_unlocked(&bo->base.base);
 	return ret;
 }
 

drivers/gpu/drm/rockchip/rockchip_drm_vop.c

@@ -39,8 +39,6 @@
 #include "rockchip_drm_vop.h"
 #include "rockchip_rgb.h"
 
-#define VOP_SELF_REFRESH_ENTRY_DELAY_MS 100
-
 #define VOP_WIN_SET(vop, win, name, v) \
 		vop_reg_set(vop, &win->phy->name, win->base, ~0, v, #name)
 #define VOP_SCL_SET(vop, win, name, v) \
@@ -1563,8 +1561,7 @@ static int vop_create_crtc(struct vop *vop)
 	init_completion(&vop->line_flag_completion);
 	crtc->port = port;
 
-	ret = drm_self_refresh_helper_init(crtc,
-					   VOP_SELF_REFRESH_ENTRY_DELAY_MS);
+	ret = drm_self_refresh_helper_init(crtc);
 	if (ret)
 		DRM_DEV_DEBUG_KMS(vop->dev,
 			"Failed to init %s with SR helpers %d, ignoring\n",

include/drm/drm_crtc.h

@@ -285,12 +285,12 @@ struct drm_crtc_state {
 	u32 target_vblank;
 
 	/**
-	 * @pageflip_flags:
+	 * @async_flip:
 	 *
-	 * DRM_MODE_PAGE_FLIP_* flags, as passed to the page flip ioctl.
-	 * Zero in any other case.
+	 * This is set when DRM_MODE_PAGE_FLIP_ASYNC is set in the legacy
+	 * PAGE_FLIP IOCTL. It's not wired up for the atomic IOCTL itself yet.
 	 */
-	u32 pageflip_flags;
+	bool async_flip;
 
 	/**
 	 * @vrr_enabled:
@@ -1108,7 +1108,7 @@ struct drm_crtc {
 	/**
 	 * @self_refresh_data: Holds the state for the self refresh helpers
 	 *
-	 * Initialized via drm_self_refresh_helper_register().
+	 * Initialized via drm_self_refresh_helper_init().
 	 */
 	struct drm_self_refresh_data *self_refresh_data;
 };

include/drm/drm_self_refresh_helper.h

@@ -12,9 +12,9 @@ struct drm_atomic_state;
 struct drm_crtc;
 
 void drm_self_refresh_helper_alter_state(struct drm_atomic_state *state);
+void drm_self_refresh_helper_update_avg_times(struct drm_atomic_state *state,
+					      unsigned int commit_time_ms);
 
-int drm_self_refresh_helper_init(struct drm_crtc *crtc,
-				 unsigned int entry_delay_ms);
-
+int drm_self_refresh_helper_init(struct drm_crtc *crtc);
 void drm_self_refresh_helper_cleanup(struct drm_crtc *crtc);
 #endif