Merge tag 'drm-misc-next-2021-04-09' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 5.13:

UAPI Changes:

Cross-subsystem Changes:

Core Changes:
  - bridge: Fix Kconfig dependency
  - cmdline: Refuse zero width/height mode
  - ttm: Ignore signaled move fences, ioremap buffer according to mem
         caching settins

Driver Changes:
  - Conversions to sysfs_emit
  - tegra: Don't register DP AUX channels before connectors
  - zynqmp: Fix for an out-of-bound (but within struct padding) memset
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210409090020.jroa2d4p4qansrpa@gilmour

drivers/dma-buf/dma-fence.c

@@ -123,7 +123,9 @@ static const struct dma_fence_ops dma_fence_stub_ops = {
 /**
  * dma_fence_get_stub - return a signaled fence
  *
- * Return a stub fence which is already signaled.
+ * Return a stub fence which is already signaled. The fence's
+ * timestamp corresponds to the first time after boot this
+ * function is called.
  */
 struct dma_fence *dma_fence_get_stub(void)
 {
@@ -141,6 +143,29 @@ struct dma_fence *dma_fence_get_stub(void)
 }
 EXPORT_SYMBOL(dma_fence_get_stub);
 
+/**
+ * dma_fence_allocate_private_stub - return a private, signaled fence
+ *
+ * Return a newly allocated and signaled stub fence.
+ */
+struct dma_fence *dma_fence_allocate_private_stub(void)
+{
+	struct dma_fence *fence;
+
+	fence = kzalloc(sizeof(*fence), GFP_KERNEL);
+	if (fence == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	dma_fence_init(fence,
+		       &dma_fence_stub_ops,
+		       &dma_fence_stub_lock,
+		       0, 0);
+	dma_fence_signal(fence);
+
+	return fence;
+}
+EXPORT_SYMBOL(dma_fence_allocate_private_stub);
+
 /**
  * dma_fence_context_alloc - allocate an array of fence contexts
  * @num: amount of contexts to allocate

drivers/gpu/drm/arm/display/include/malidp_utils.h

@@ -13,9 +13,6 @@
 #define has_bit(nr, mask)	(BIT(nr) & (mask))
 #define has_bits(bits, mask)	(((bits) & (mask)) == (bits))
 
-#define dp_for_each_set_bit(bit, mask) \
-	for_each_set_bit((bit), ((unsigned long *)&(mask)), sizeof(mask) * 8)
-
 #define dp_wait_cond(__cond, __tries, __min_range, __max_range)	\
 ({							\
 	int num_tries = __tries;			\

drivers/gpu/drm/arm/display/komeda/komeda_dev.c

@@ -62,7 +62,7 @@ core_id_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct komeda_dev *mdev = dev_to_mdev(dev);
 
-	return snprintf(buf, PAGE_SIZE, "0x%08x\n", mdev->chip.core_id);
+	return sysfs_emit(buf, "0x%08x\n", mdev->chip.core_id);
 }
 static DEVICE_ATTR_RO(core_id);
 
@@ -85,7 +85,7 @@ config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
 		if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER)
 			config_id.n_richs++;
 	}
-	return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value);
+	return sysfs_emit(buf, "0x%08x\n", config_id.value);
 }
 static DEVICE_ATTR_RO(config_id);
 
@@ -94,7 +94,7 @@ aclk_hz_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct komeda_dev *mdev = dev_to_mdev(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%lu\n", clk_get_rate(mdev->aclk));
+	return sysfs_emit(buf, "%lu\n", clk_get_rate(mdev->aclk));
 }
 static DEVICE_ATTR_RO(aclk_hz);
 

drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c

@@ -46,8 +46,9 @@ void komeda_pipeline_destroy(struct komeda_dev *mdev,
 {
 	struct komeda_component *c;
 	int i;
+	unsigned long avail_comps = pipe->avail_comps;
 
-	dp_for_each_set_bit(i, pipe->avail_comps) {
+	for_each_set_bit(i, &avail_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, i);
 		komeda_component_destroy(mdev, c);
 	}
@@ -247,6 +248,7 @@ static void komeda_pipeline_dump(struct komeda_pipeline *pipe)
 {
 	struct komeda_component *c;
 	int id;
+	unsigned long avail_comps = pipe->avail_comps;
 
 	DRM_INFO("Pipeline-%d: n_layers: %d, n_scalers: %d, output: %s.\n",
 		 pipe->id, pipe->n_layers, pipe->n_scalers,
@@ -258,7 +260,7 @@ static void komeda_pipeline_dump(struct komeda_pipeline *pipe)
 		 pipe->of_output_links[1] ?
 		 pipe->of_output_links[1]->full_name : "none");
 
-	dp_for_each_set_bit(id, pipe->avail_comps) {
+	for_each_set_bit(id, &avail_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 
 		komeda_component_dump(c);
@@ -270,8 +272,9 @@ static void komeda_component_verify_inputs(struct komeda_component *c)
 	struct komeda_pipeline *pipe = c->pipeline;
 	struct komeda_component *input;
 	int id;
+	unsigned long supported_inputs = c->supported_inputs;
 
-	dp_for_each_set_bit(id, c->supported_inputs) {
+	for_each_set_bit(id, &supported_inputs, 32) {
 		input = komeda_pipeline_get_component(pipe, id);
 		if (!input) {
 			c->supported_inputs &= ~(BIT(id));
@@ -302,8 +305,9 @@ static void komeda_pipeline_assemble(struct komeda_pipeline *pipe)
 	struct komeda_component *c;
 	struct komeda_layer *layer;
 	int i, id;
+	unsigned long avail_comps = pipe->avail_comps;
 
-	dp_for_each_set_bit(id, pipe->avail_comps) {
+	for_each_set_bit(id, &avail_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 		komeda_component_verify_inputs(c);
 	}
@@ -355,13 +359,15 @@ void komeda_pipeline_dump_register(struct komeda_pipeline *pipe,
 {
 	struct komeda_component *c;
 	u32 id;
+	unsigned long avail_comps;
 
 	seq_printf(sf, "\n======== Pipeline-%d ==========\n", pipe->id);
 
 	if (pipe->funcs && pipe->funcs->dump_register)
 		pipe->funcs->dump_register(pipe, sf);
 
-	dp_for_each_set_bit(id, pipe->avail_comps) {
+	avail_comps = pipe->avail_comps;
+	for_each_set_bit(id, &avail_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 
 		seq_printf(sf, "\n------%s------\n", c->name);

drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c

@@ -1231,14 +1231,15 @@ komeda_pipeline_unbound_components(struct komeda_pipeline *pipe,
 	struct komeda_pipeline_state *old = priv_to_pipe_st(pipe->obj.state);
 	struct komeda_component_state *c_st;
 	struct komeda_component *c;
-	u32 disabling_comps, id;
+	u32 id;
+	unsigned long disabling_comps;
 
 	WARN_ON(!old);
 
 	disabling_comps = (~new->active_comps) & old->active_comps;
 
 	/* unbound all disabling component */
-	dp_for_each_set_bit(id, disabling_comps) {
+	for_each_set_bit(id, &disabling_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 		c_st = komeda_component_get_state_and_set_user(c,
 				drm_st, NULL, new->crtc);
@@ -1286,7 +1287,8 @@ bool komeda_pipeline_disable(struct komeda_pipeline *pipe,
 	struct komeda_pipeline_state *old;
 	struct komeda_component *c;
 	struct komeda_component_state *c_st;
-	u32 id, disabling_comps = 0;
+	u32 id;
+	unsigned long disabling_comps;
 
 	old = komeda_pipeline_get_old_state(pipe, old_state);
 
@@ -1296,10 +1298,10 @@ bool komeda_pipeline_disable(struct komeda_pipeline *pipe,
 		disabling_comps = old->active_comps &
 				  pipe->standalone_disabled_comps;
 
-	DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, disabling_comps: 0x%x.\n",
+	DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, disabling_comps: 0x%lx.\n",
 			 pipe->id, old->active_comps, disabling_comps);
 
-	dp_for_each_set_bit(id, disabling_comps) {
+	for_each_set_bit(id, &disabling_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 		c_st = priv_to_comp_st(c->obj.state);
 
@@ -1330,16 +1332,17 @@ void komeda_pipeline_update(struct komeda_pipeline *pipe,
 	struct komeda_pipeline_state *new = priv_to_pipe_st(pipe->obj.state);
 	struct komeda_pipeline_state *old;
 	struct komeda_component *c;
-	u32 id, changed_comps = 0;
+	u32 id;
+	unsigned long changed_comps;
 
 	old = komeda_pipeline_get_old_state(pipe, old_state);
 
 	changed_comps = new->active_comps | old->active_comps;
 
-	DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, changed: 0x%x.\n",
+	DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, changed: 0x%lx.\n",
 			 pipe->id, new->active_comps, changed_comps);
 
-	dp_for_each_set_bit(id, changed_comps) {
+	for_each_set_bit(id, &changed_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 
 		if (new->active_comps & BIT(c->id))

drivers/gpu/drm/bridge/Kconfig

@@ -55,7 +55,7 @@ config DRM_DISPLAY_CONNECTOR
 	depends on OF
 	help
 	  Driver for display connectors with support for DDC and hot-plug
-	  detection. Most display controller handle display connectors
+	  detection. Most display controllers handle display connectors
 	  internally and don't need this driver, but the DRM subsystem is
 	  moving towards separating connector handling from display controllers
 	  on ARM-based platforms. Saying Y here when this driver is not needed
@@ -210,6 +210,7 @@ config DRM_TOSHIBA_TC358762
 	tristate "TC358762 DSI/DPI bridge"
 	depends on OF
 	select DRM_MIPI_DSI
+	select DRM_KMS_HELPER
 	select DRM_PANEL_BRIDGE
 	help
 	  Toshiba TC358762 DSI/DPI bridge driver.

drivers/gpu/drm/bridge/lontium-lt8912b.c

@@ -5,6 +5,7 @@
 
 #include <linux/device.h>
 #include <linux/delay.h>
+#include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>

drivers/gpu/drm/drm_dp_mst_topology.c

@@ -4109,10 +4109,9 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
 		return 0;
 
 	up_req = kzalloc(sizeof(*up_req), GFP_KERNEL);
-	if (!up_req) {
-		DRM_ERROR("Not enough memory to process MST up req\n");
+	if (!up_req)
 		return -ENOMEM;
-	}
+
 	INIT_LIST_HEAD(&up_req->next);
 
 	drm_dp_sideband_parse_req(&mgr->up_req_recv, &up_req->msg);

drivers/gpu/drm/drm_internal.h

@@ -170,7 +170,6 @@ void drm_sysfs_connector_remove(struct drm_connector *connector);
 void drm_sysfs_lease_event(struct drm_device *dev);
 
 /* drm_gem.c */
-struct drm_gem_object;
 int drm_gem_init(struct drm_device *dev);
 int drm_gem_handle_create_tail(struct drm_file *file_priv,
 			       struct drm_gem_object *obj,

drivers/gpu/drm/drm_modes.c

@@ -1864,6 +1864,9 @@ drm_mode_create_from_cmdline_mode(struct drm_device *dev,
 {
 	struct drm_display_mode *mode;
 
+	if (cmd->xres == 0 || cmd->yres == 0)
+		return NULL;
+
 	if (cmd->cvt)
 		mode = drm_cvt_mode(dev,
 				    cmd->xres, cmd->yres,

drivers/gpu/drm/drm_syncobj.c

@@ -350,12 +350,16 @@ EXPORT_SYMBOL(drm_syncobj_replace_fence);
  *
  * Assign a already signaled stub fence to the sync object.
  */
-static void drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj)
+static int drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj)
 {
-	struct dma_fence *fence = dma_fence_get_stub();
+	struct dma_fence *fence = dma_fence_allocate_private_stub();
+
+	if (IS_ERR(fence))
+		return PTR_ERR(fence);
 
 	drm_syncobj_replace_fence(syncobj, fence);
 	dma_fence_put(fence);
+	return 0;
 }
 
 /* 5s default for wait submission */
@@ -478,6 +482,7 @@ EXPORT_SYMBOL(drm_syncobj_free);
 int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
 		       struct dma_fence *fence)
 {
+	int ret;
 	struct drm_syncobj *syncobj;
 
 	syncobj = kzalloc(sizeof(struct drm_syncobj), GFP_KERNEL);
@@ -488,8 +493,13 @@ int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
 	INIT_LIST_HEAD(&syncobj->cb_list);
 	spin_lock_init(&syncobj->lock);
 
-	if (flags & DRM_SYNCOBJ_CREATE_SIGNALED)
-		drm_syncobj_assign_null_handle(syncobj);
+	if (flags & DRM_SYNCOBJ_CREATE_SIGNALED) {
+		ret = drm_syncobj_assign_null_handle(syncobj);
+		if (ret < 0) {
+			drm_syncobj_put(syncobj);
+			return ret;
+		}
+	}
 
 	if (fence)
 		drm_syncobj_replace_fence(syncobj, fence);
@@ -1334,8 +1344,11 @@ drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
 	if (ret < 0)
 		return ret;
 
-	for (i = 0; i < args->count_handles; i++)
-		drm_syncobj_assign_null_handle(syncobjs[i]);
+	for (i = 0; i < args->count_handles; i++) {
+		ret = drm_syncobj_assign_null_handle(syncobjs[i]);
+		if (ret < 0)
+			break;
+	}
 
 	drm_syncobj_array_free(syncobjs, args->count_handles);
 

drivers/gpu/drm/drm_vblank.c

@@ -1478,6 +1478,7 @@ static void drm_vblank_restore(struct drm_device *dev, unsigned int pipe)
 	u64 diff_ns;
 	u32 cur_vblank, diff = 1;
 	int count = DRM_TIMESTAMP_MAXRETRIES;
+	u32 max_vblank_count = drm_max_vblank_count(dev, pipe);
 
 	if (drm_WARN_ON(dev, pipe >= dev->num_crtcs))
 		return;
@@ -1504,7 +1505,7 @@ static void drm_vblank_restore(struct drm_device *dev, unsigned int pipe)
 	drm_dbg_vbl(dev,
 		    "missed %d vblanks in %lld ns, frame duration=%d ns, hw_diff=%d\n",
 		    diff, diff_ns, framedur_ns, cur_vblank - vblank->last);
-	store_vblank(dev, pipe, diff, t_vblank, cur_vblank);
+	vblank->last = (cur_vblank - diff) & max_vblank_count;
 }
 
 /**

drivers/gpu/drm/gma500/power.c

@@ -36,7 +36,7 @@
 #include <linux/pm_runtime.h>
 
 static struct mutex power_mutex;	/* Serialize power ops */
-static spinlock_t power_ctrl_lock;	/* Serialize power claim */
+static DEFINE_SPINLOCK(power_ctrl_lock);	/* Serialize power claim */
 
 /**
  *	gma_power_init		-	initialise power manager
@@ -55,7 +55,6 @@ void gma_power_init(struct drm_device *dev)
 	dev_priv->display_power = true;	/* We start active */
 	dev_priv->display_count = 0;	/* Currently no users */
 	dev_priv->suspended = false;	/* And not suspended */
-	spin_lock_init(&power_ctrl_lock);
 	mutex_init(&power_mutex);
 
 	if (dev_priv->ops->init_pm)

drivers/gpu/drm/panel/panel-tpo-td043mtea1.c

@@ -186,7 +186,7 @@ static ssize_t vmirror_show(struct device *dev, struct device_attribute *attr,
 {
 	struct td043mtea1_panel *lcd = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", lcd->vmirror);
+	return sysfs_emit(buf, "%d\n", lcd->vmirror);
 }
 
 static ssize_t vmirror_store(struct device *dev, struct device_attribute *attr,
@@ -214,7 +214,7 @@ static ssize_t mode_show(struct device *dev, struct device_attribute *attr,
 {
 	struct td043mtea1_panel *lcd = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", lcd->mode);
+	return sysfs_emit(buf, "%d\n", lcd->mode);
 }
 
 static ssize_t mode_store(struct device *dev, struct device_attribute *attr,

drivers/gpu/drm/tegra/dpaux.c

@@ -534,9 +534,7 @@ static int tegra_dpaux_probe(struct platform_device *pdev)
 	dpaux->aux.transfer = tegra_dpaux_transfer;
 	dpaux->aux.dev = &pdev->dev;
 
-	err = drm_dp_aux_register(&dpaux->aux);
-	if (err < 0)
-		return err;
+	drm_dp_aux_init(&dpaux->aux);
 
 	/*
 	 * Assume that by default the DPAUX/I2C pads will be used for HDMI,
@@ -589,8 +587,6 @@ static int tegra_dpaux_remove(struct platform_device *pdev)
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 
-	drm_dp_aux_unregister(&dpaux->aux);
-
 	mutex_lock(&dpaux_lock);
 	list_del(&dpaux->list);
 	mutex_unlock(&dpaux_lock);
@@ -723,6 +719,10 @@ int drm_dp_aux_attach(struct drm_dp_aux *aux, struct tegra_output *output)
 	unsigned long timeout;
 	int err;
 
+	err = drm_dp_aux_register(aux);
+	if (err < 0)
+		return err;
+
 	output->connector.polled = DRM_CONNECTOR_POLL_HPD;
 	dpaux->output = output;
 
@@ -760,6 +760,7 @@ int drm_dp_aux_detach(struct drm_dp_aux *aux)
 	unsigned long timeout;
 	int err;
 
+	drm_dp_aux_unregister(aux);
 	disable_irq(dpaux->irq);
 
 	if (dpaux->output->panel) {

drivers/gpu/drm/ttm/ttm_bo.c

@@ -705,8 +705,9 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
 		return 0;
 
 	if (no_wait_gpu) {
+		ret = dma_fence_is_signaled(fence) ? 0 : -EBUSY;
 		dma_fence_put(fence);
-		return -EBUSY;
+		return ret;
 	}
 
 	dma_resv_add_shared_fence(bo->base.resv, fence);

drivers/gpu/drm/ttm/ttm_bo_util.c

@@ -91,6 +91,10 @@ static int ttm_resource_ioremap(struct ttm_device *bdev,
 
 		if (mem->bus.caching == ttm_write_combined)
 			addr = ioremap_wc(mem->bus.offset, bus_size);
+#ifdef CONFIG_X86
+		else if (mem->bus.caching == ttm_cached)
+			addr = ioremap_cache(mem->bus.offset, bus_size);
+#endif
 		else
 			addr = ioremap(mem->bus.offset, bus_size);
 		if (!addr) {
@@ -371,6 +375,11 @@ static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
 		if (mem->bus.caching == ttm_write_combined)
 			map->virtual = ioremap_wc(bo->mem.bus.offset + offset,
 						  size);
+#ifdef CONFIG_X86
+		else if (mem->bus.caching == ttm_cached)
+			map->virtual = ioremap_cache(bo->mem.bus.offset + offset,
+						  size);
+#endif
 		else
 			map->virtual = ioremap(bo->mem.bus.offset + offset,
 					       size);
@@ -489,6 +498,11 @@ int ttm_bo_vmap(struct ttm_buffer_object *bo, struct dma_buf_map *map)
 		else if (mem->bus.caching == ttm_write_combined)
 			vaddr_iomem = ioremap_wc(mem->bus.offset,
 						 bo->base.size);
+#ifdef CONFIG_X86
+		else if (mem->bus.caching == ttm_cached)
+			vaddr_iomem = ioremap_cache(mem->bus.offset,
+						  bo->base.size);
+#endif
 		else
 			vaddr_iomem = ioremap(mem->bus.offset, bo->base.size);
 

drivers/gpu/drm/xlnx/zynqmp_dp.c

@@ -866,7 +866,7 @@ static int zynqmp_dp_train(struct zynqmp_dp *dp)
 		return ret;
 
 	zynqmp_dp_write(dp, ZYNQMP_DP_SCRAMBLING_DISABLE, 1);
-	memset(dp->train_set, 0, 4);
+	memset(dp->train_set, 0, sizeof(dp->train_set));
 	ret = zynqmp_dp_link_train_cr(dp);
 	if (ret)
 		return ret;

include/drm/drm_dp_helper.h

@@ -1846,34 +1846,34 @@ struct drm_dp_aux_cec {
  * @crc_count: counter of captured frame CRCs
  * @transfer: transfers a message representing a single AUX transaction
  *
- * The .dev field should be set to a pointer to the device that implements
- * the AUX channel.
+ * The @dev field should be set to a pointer to the device that implements the
+ * AUX channel.
  *
- * The .name field may be used to specify the name of the I2C adapter. If set to
- * NULL, dev_name() of .dev will be used.
+ * The @name field may be used to specify the name of the I2C adapter. If set to
+ * %NULL, dev_name() of @dev will be used.
  *
- * Drivers provide a hardware-specific implementation of how transactions
- * are executed via the .transfer() function. A pointer to a drm_dp_aux_msg
+ * Drivers provide a hardware-specific implementation of how transactions are
+ * executed via the @transfer() function. A pointer to a &drm_dp_aux_msg
  * structure describing the transaction is passed into this function. Upon
- * success, the implementation should return the number of payload bytes
- * that were transferred, or a negative error-code on failure. Helpers
- * propagate errors from the .transfer() function, with the exception of
- * the -EBUSY error, which causes a transaction to be retried. On a short,
- * helpers will return -EPROTO to make it simpler to check for failure.
+ * success, the implementation should return the number of payload bytes that
+ * were transferred, or a negative error-code on failure. Helpers propagate
+ * errors from the @transfer() function, with the exception of the %-EBUSY
+ * error, which causes a transaction to be retried. On a short, helpers will
+ * return %-EPROTO to make it simpler to check for failure.
  *
  * An AUX channel can also be used to transport I2C messages to a sink. A
- * typical application of that is to access an EDID that's present in the
- * sink device. The .transfer() function can also be used to execute such
- * transactions. The drm_dp_aux_register() function registers an I2C
- * adapter that can be passed to drm_probe_ddc(). Upon removal, drivers
- * should call drm_dp_aux_unregister() to remove the I2C adapter.
- * The I2C adapter uses long transfers by default; if a partial response is
- * received, the adapter will drop down to the size given by the partial
- * response for this transaction only.
+ * typical application of that is to access an EDID that's present in the sink
+ * device. The @transfer() function can also be used to execute such
+ * transactions. The drm_dp_aux_register() function registers an I2C adapter
+ * that can be passed to drm_probe_ddc(). Upon removal, drivers should call
+ * drm_dp_aux_unregister() to remove the I2C adapter. The I2C adapter uses long
+ * transfers by default; if a partial response is received, the adapter will
+ * drop down to the size given by the partial response for this transaction
+ * only.
  *
- * Note that the aux helper code assumes that the .transfer() function
- * only modifies the reply field of the drm_dp_aux_msg structure.  The
- * retry logic and i2c helpers assume this is the case.
+ * Note that the aux helper code assumes that the @transfer() function only
+ * modifies the reply field of the &drm_dp_aux_msg structure. The retry logic
+ * and i2c helpers assume this is the case.
  */
 struct drm_dp_aux {
 	const char *name;

include/drm/drm_print.h

@@ -524,16 +524,20 @@ void __drm_err(const char *format, ...);
 #define DRM_DEBUG_DP(fmt, ...)						\
 	__drm_dbg(DRM_UT_DP, fmt, ## __VA_ARGS__)
 
-
-#define DRM_DEBUG_KMS_RATELIMITED(fmt, ...)				\
-({									\
-	static DEFINE_RATELIMIT_STATE(_rs,				\
-				      DEFAULT_RATELIMIT_INTERVAL,       \
-				      DEFAULT_RATELIMIT_BURST);         \
-	if (__ratelimit(&_rs))						\
-		drm_dev_dbg(NULL, DRM_UT_KMS, fmt, ##__VA_ARGS__);	\
+#define __DRM_DEFINE_DBG_RATELIMITED(category, drm, fmt, ...)					\
+({												\
+	static DEFINE_RATELIMIT_STATE(rs_, DEFAULT_RATELIMIT_INTERVAL, DEFAULT_RATELIMIT_BURST);\
+	const struct drm_device *drm_ = (drm);							\
+												\
+	if (drm_debug_enabled(DRM_UT_ ## category) && __ratelimit(&rs_))			\
+		drm_dev_printk(drm_ ? drm_->dev : NULL, KERN_DEBUG, fmt, ## __VA_ARGS__);	\
 })
 
+#define drm_dbg_kms_ratelimited(drm, fmt, ...) \
+	__DRM_DEFINE_DBG_RATELIMITED(KMS, drm, fmt, ## __VA_ARGS__)
+
+#define DRM_DEBUG_KMS_RATELIMITED(fmt, ...) drm_dbg_kms_ratelimited(NULL, fmt, ## __VA_ARGS__)
+
 /*
  * struct drm_device based WARNs
  *

include/drm/gpu_scheduler.h

@@ -277,6 +277,7 @@ struct drm_sched_backend_ops {
  * @hang_limit: once the hangs by a job crosses this limit then it is marked
  *              guilty and it will be considered for scheduling further.
  * @score: score to help loadbalancer pick a idle sched
+ * @_score: score used when the driver doesn't provide one
  * @ready: marks if the underlying HW is ready to work
  * @free_guilty: A hit to time out handler to free the guilty job.
  *

include/linux/dma-fence.h

@@ -587,6 +587,7 @@ static inline signed long dma_fence_wait(struct dma_fence *fence, bool intr)
 }
 
 struct dma_fence *dma_fence_get_stub(void);
+struct dma_fence *dma_fence_allocate_private_stub(void);
 u64 dma_fence_context_alloc(unsigned num);
 
 #define DMA_FENCE_TRACE(f, fmt, args...) \