1/*
  2 * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
  3 *
  4 * Copyright 2008 Ben Gamari <bgamari@gmail.com>
  5 *
  6 * Permission is hereby granted, free of charge, to any person obtaining a
  7 * copy of this software and associated documentation files (the "Software"),
  8 * to deal in the Software without restriction, including without limitation
  9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 10 * and/or sell copies of the Software, and to permit persons to whom the
 11 * Software is furnished to do so, subject to the following conditions:
 12 *
 13 * The above copyright notice and this permission notice (including the next
 14 * paragraph) shall be included in all copies or substantial portions of the
 15 * Software.
 16 *
 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 23 * OTHER DEALINGS IN THE SOFTWARE.
 24 */
 25
 26#include <linux/debugfs.h>
 27#include <linux/export.h>
 28#include <linux/seq_file.h>
 29#include <linux/slab.h>
 30#include <linux/uaccess.h>
 31
 32#include <drm/drm_atomic.h>
 33#include <drm/drm_auth.h>
 34#include <drm/drm_bridge.h>
 
 35#include <drm/drm_debugfs.h>
 36#include <drm/drm_device.h>
 37#include <drm/drm_drv.h>
 38#include <drm/drm_edid.h>
 39#include <drm/drm_file.h>
 40#include <drm/drm_gem.h>
 41#include <drm/drm_managed.h>
 42#include <drm/drm_gpuvm.h>
 43
 44#include "drm_crtc_internal.h"
 45#include "drm_internal.h"
 46
 
 
 47/***************************************************
 48 * Initialization, etc.
 49 **************************************************/
 50
 51static int drm_name_info(struct seq_file *m, void *data)
 52{
 53	struct drm_debugfs_entry *entry = m->private;
 54	struct drm_device *dev = entry->dev;
 55	struct drm_master *master;
 56
 57	mutex_lock(&dev->master_mutex);
 58	master = dev->master;
 59	seq_printf(m, "%s", dev->driver->name);
 60	if (dev->dev)
 61		seq_printf(m, " dev=%s", dev_name(dev->dev));
 62	if (master && master->unique)
 63		seq_printf(m, " master=%s", master->unique);
 64	if (dev->unique)
 65		seq_printf(m, " unique=%s", dev->unique);
 66	seq_printf(m, "\n");
 67	mutex_unlock(&dev->master_mutex);
 68
 69	return 0;
 70}
 71
 72static int drm_clients_info(struct seq_file *m, void *data)
 73{
 74	struct drm_debugfs_entry *entry = m->private;
 75	struct drm_device *dev = entry->dev;
 76	struct drm_file *priv;
 77	kuid_t uid;
 78
 79	seq_printf(m,
 80		   "%20s %5s %3s master a %5s %10s %*s\n",
 81		   "command",
 82		   "tgid",
 83		   "dev",
 84		   "uid",
 85		   "magic",
 86		   DRM_CLIENT_NAME_MAX_LEN,
 87		   "name");
 88
 89	/* dev->filelist is sorted youngest first, but we want to present
 90	 * oldest first (i.e. kernel, servers, clients), so walk backwardss.
 91	 */
 92	mutex_lock(&dev->filelist_mutex);
 93	list_for_each_entry_reverse(priv, &dev->filelist, lhead) {
 94		bool is_current_master = drm_is_current_master(priv);
 95		struct task_struct *task;
 96		struct pid *pid;
 97
 98		mutex_lock(&priv->client_name_lock);
 99		rcu_read_lock(); /* Locks priv->pid and pid_task()->comm! */
100		pid = rcu_dereference(priv->pid);
101		task = pid_task(pid, PIDTYPE_TGID);
102		uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
103		seq_printf(m, "%20s %5d %3d   %c    %c %5d %10u %*s\n",
104			   task ? task->comm : "<unknown>",
105			   pid_vnr(pid),
106			   priv->minor->index,
107			   is_current_master ? 'y' : 'n',
108			   priv->authenticated ? 'y' : 'n',
109			   from_kuid_munged(seq_user_ns(m), uid),
110			   priv->magic,
111			   DRM_CLIENT_NAME_MAX_LEN,
112			   priv->client_name ? priv->client_name : "<unset>");
113		rcu_read_unlock();
114		mutex_unlock(&priv->client_name_lock);
115	}
116	mutex_unlock(&dev->filelist_mutex);
117	return 0;
118}
119
120static int drm_gem_one_name_info(int id, void *ptr, void *data)
121{
122	struct drm_gem_object *obj = ptr;
123	struct seq_file *m = data;
124
125	seq_printf(m, "%6d %8zd %7d %8d\n",
126		   obj->name, obj->size,
127		   obj->handle_count,
128		   kref_read(&obj->refcount));
129	return 0;
130}
131
132static int drm_gem_name_info(struct seq_file *m, void *data)
133{
134	struct drm_debugfs_entry *entry = m->private;
135	struct drm_device *dev = entry->dev;
136
137	seq_printf(m, "  name     size handles refcount\n");
138
139	mutex_lock(&dev->object_name_lock);
140	idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
141	mutex_unlock(&dev->object_name_lock);
142
143	return 0;
144}
145
146static const struct drm_debugfs_info drm_debugfs_list[] = {
147	{"name", drm_name_info, 0},
148	{"clients", drm_clients_info, 0},
149	{"gem_names", drm_gem_name_info, DRIVER_GEM},
150};
151#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
152
153
154static int drm_debugfs_open(struct inode *inode, struct file *file)
155{
156	struct drm_info_node *node = inode->i_private;
157
158	if (!device_is_registered(node->minor->kdev))
159		return -ENODEV;
160
161	return single_open(file, node->info_ent->show, node);
162}
163
164static int drm_debugfs_entry_open(struct inode *inode, struct file *file)
165{
166	struct drm_debugfs_entry *entry = inode->i_private;
167	struct drm_debugfs_info *node = &entry->file;
168	struct drm_minor *minor = entry->dev->primary ?: entry->dev->accel;
169
170	if (!device_is_registered(minor->kdev))
171		return -ENODEV;
172
173	return single_open(file, node->show, entry);
174}
175
176static const struct file_operations drm_debugfs_entry_fops = {
177	.owner = THIS_MODULE,
178	.open = drm_debugfs_entry_open,
179	.read = seq_read,
180	.llseek = seq_lseek,
181	.release = single_release,
182};
183
184static const struct file_operations drm_debugfs_fops = {
185	.owner = THIS_MODULE,
186	.open = drm_debugfs_open,
187	.read = seq_read,
188	.llseek = seq_lseek,
189	.release = single_release,
190};
191
192/**
193 * drm_debugfs_gpuva_info - dump the given DRM GPU VA space
194 * @m: pointer to the &seq_file to write
195 * @gpuvm: the &drm_gpuvm representing the GPU VA space
196 *
197 * Dumps the GPU VA mappings of a given DRM GPU VA manager.
198 *
199 * For each DRM GPU VA space drivers should call this function from their
200 * &drm_info_list's show callback.
201 *
202 * Returns: 0 on success, -ENODEV if the &gpuvm is not initialized
203 */
204int drm_debugfs_gpuva_info(struct seq_file *m,
205			   struct drm_gpuvm *gpuvm)
206{
207	struct drm_gpuva *va, *kva = &gpuvm->kernel_alloc_node;
208
209	if (!gpuvm->name)
210		return -ENODEV;
211
212	seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n",
213		   gpuvm->name, gpuvm->mm_start, gpuvm->mm_start + gpuvm->mm_range);
214	seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n",
215		   kva->va.addr, kva->va.addr + kva->va.range);
216	seq_puts(m, "\n");
217	seq_puts(m, " VAs | start              | range              | end                | object             | object offset\n");
218	seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n");
219	drm_gpuvm_for_each_va(va, gpuvm) {
220		if (unlikely(va == kva))
221			continue;
222
223		seq_printf(m, "     | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",
224			   va->va.addr, va->va.range, va->va.addr + va->va.range,
225			   (u64)(uintptr_t)va->gem.obj, va->gem.offset);
226	}
227
228	return 0;
229}
230EXPORT_SYMBOL(drm_debugfs_gpuva_info);
231
232/**
233 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
234 * 			minor
235 * @files: The array of files to create
236 * @count: The number of files given
237 * @root: DRI debugfs dir entry.
238 * @minor: device minor number
239 *
240 * Create a given set of debugfs files represented by an array of
241 * &struct drm_info_list in the given root directory. These files will be removed
242 * automatically on drm_debugfs_dev_fini().
243 */
244void drm_debugfs_create_files(const struct drm_info_list *files, int count,
245			      struct dentry *root, struct drm_minor *minor)
246{
247	struct drm_device *dev = minor->dev;
248	struct drm_info_node *tmp;
249	int i;
250
251	for (i = 0; i < count; i++) {
252		u32 features = files[i].driver_features;
253
254		if (features && !drm_core_check_all_features(dev, features))
255			continue;
256
257		tmp = drmm_kzalloc(dev, sizeof(*tmp), GFP_KERNEL);
258		if (tmp == NULL)
259			continue;
260
261		tmp->minor = minor;
262		tmp->dent = debugfs_create_file(files[i].name,
263						0444, root, tmp,
264						&drm_debugfs_fops);
265		tmp->info_ent = &files[i];
266	}
267}
268EXPORT_SYMBOL(drm_debugfs_create_files);
269
270int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
271			     struct dentry *root, struct drm_minor *minor)
272{
273	int i;
274
275	for (i = 0; i < count; i++) {
276		struct dentry *dent = debugfs_lookup(files[i].name, root);
277
278		if (!dent)
279			continue;
280
281		drmm_kfree(minor->dev, d_inode(dent)->i_private);
282		debugfs_remove(dent);
283	}
284	return 0;
285}
286EXPORT_SYMBOL(drm_debugfs_remove_files);
287
288/**
289 * drm_debugfs_dev_init - create debugfs directory for the device
290 * @dev: the device which we want to create the directory for
291 * @root: the parent directory depending on the device type
292 *
293 * Creates the debugfs directory for the device under the given root directory.
294 */
295void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root)
296{
297	dev->debugfs_root = debugfs_create_dir(dev->unique, root);
298}
299
300/**
301 * drm_debugfs_dev_fini - cleanup debugfs directory
302 * @dev: the device to cleanup the debugfs stuff
303 *
304 * Remove the debugfs directory, might be called multiple times.
305 */
306void drm_debugfs_dev_fini(struct drm_device *dev)
307{
308	debugfs_remove_recursive(dev->debugfs_root);
309	dev->debugfs_root = NULL;
310}
311
312void drm_debugfs_dev_register(struct drm_device *dev)
313{
314	drm_debugfs_add_files(dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES);
315
316	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
317		drm_framebuffer_debugfs_init(dev);
318		drm_client_debugfs_init(dev);
319	}
320	if (drm_drv_uses_atomic_modeset(dev))
321		drm_atomic_debugfs_init(dev);
322}
323
324int drm_debugfs_register(struct drm_minor *minor, int minor_id,
325			 struct dentry *root)
326{
327	struct drm_device *dev = minor->dev;
328	char name[64];
329
330	sprintf(name, "%d", minor_id);
331	minor->debugfs_symlink = debugfs_create_symlink(name, root,
332							dev->unique);
333
334	/* TODO: Only for compatibility with drivers */
335	minor->debugfs_root = dev->debugfs_root;
336
337	if (dev->driver->debugfs_init && dev->render != minor)
338		dev->driver->debugfs_init(minor);
339
340	return 0;
341}
342
343void drm_debugfs_unregister(struct drm_minor *minor)
344{
345	debugfs_remove(minor->debugfs_symlink);
346	minor->debugfs_symlink = NULL;
347}
348
349/**
350 * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list
351 * @dev: drm device for the ioctl
352 * @name: debugfs file name
353 * @show: show callback
354 * @data: driver-private data, should not be device-specific
355 *
356 * Add a given file entry to the DRM device debugfs file list to be created on
357 * drm_debugfs_init.
358 */
359void drm_debugfs_add_file(struct drm_device *dev, const char *name,
360			  int (*show)(struct seq_file*, void*), void *data)
361{
362	struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL);
363
364	if (!entry)
365		return;
366
367	entry->file.name = name;
368	entry->file.show = show;
369	entry->file.data = data;
370	entry->dev = dev;
371
372	debugfs_create_file(name, 0444, dev->debugfs_root, entry,
373			    &drm_debugfs_entry_fops);
374}
375EXPORT_SYMBOL(drm_debugfs_add_file);
376
377/**
378 * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list
379 * @dev: drm device for the ioctl
380 * @files: The array of files to create
381 * @count: The number of files given
382 *
383 * Add a given set of debugfs files represented by an array of
384 * &struct drm_debugfs_info in the DRM device debugfs file list.
385 */
386void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count)
387{
388	int i;
389
390	for (i = 0; i < count; i++)
391		drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data);
392}
393EXPORT_SYMBOL(drm_debugfs_add_files);
394
395static int connector_show(struct seq_file *m, void *data)
396{
397	struct drm_connector *connector = m->private;
398
399	seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
400
401	return 0;
402}
403
404static int connector_open(struct inode *inode, struct file *file)
405{
406	struct drm_connector *dev = inode->i_private;
407
408	return single_open(file, connector_show, dev);
409}
410
411static ssize_t connector_write(struct file *file, const char __user *ubuf,
412			       size_t len, loff_t *offp)
413{
414	struct seq_file *m = file->private_data;
415	struct drm_connector *connector = m->private;
416	char buf[12];
417
418	if (len > sizeof(buf) - 1)
419		return -EINVAL;
420
421	if (copy_from_user(buf, ubuf, len))
422		return -EFAULT;
423
424	buf[len] = '\0';
425
426	if (sysfs_streq(buf, "on"))
427		connector->force = DRM_FORCE_ON;
428	else if (sysfs_streq(buf, "digital"))
429		connector->force = DRM_FORCE_ON_DIGITAL;
430	else if (sysfs_streq(buf, "off"))
431		connector->force = DRM_FORCE_OFF;
432	else if (sysfs_streq(buf, "unspecified"))
433		connector->force = DRM_FORCE_UNSPECIFIED;
434	else
435		return -EINVAL;
436
437	return len;
438}
439
440static int edid_show(struct seq_file *m, void *data)
441{
442	return drm_edid_override_show(m->private, m);
443}
444
445static int edid_open(struct inode *inode, struct file *file)
446{
447	struct drm_connector *dev = inode->i_private;
448
449	return single_open(file, edid_show, dev);
450}
451
452static ssize_t edid_write(struct file *file, const char __user *ubuf,
453			  size_t len, loff_t *offp)
454{
455	struct seq_file *m = file->private_data;
456	struct drm_connector *connector = m->private;
457	char *buf;
458	int ret;
459
460	buf = memdup_user(ubuf, len);
461	if (IS_ERR(buf))
462		return PTR_ERR(buf);
463
464	if (len == 5 && !strncmp(buf, "reset", 5))
465		ret = drm_edid_override_reset(connector);
466	else
467		ret = drm_edid_override_set(connector, buf, len);
468
469	kfree(buf);
470
471	return ret ? ret : len;
472}
473
474/*
475 * Returns the min and max vrr vfreq through the connector's debugfs file.
476 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
477 */
478static int vrr_range_show(struct seq_file *m, void *data)
479{
480	struct drm_connector *connector = m->private;
481
482	if (connector->status != connector_status_connected)
483		return -ENODEV;
484
485	seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq);
486	seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq);
487
488	return 0;
489}
490DEFINE_SHOW_ATTRIBUTE(vrr_range);
491
492/*
493 * Returns Connector's max supported bpc through debugfs file.
494 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
495 */
496static int output_bpc_show(struct seq_file *m, void *data)
497{
498	struct drm_connector *connector = m->private;
499
500	if (connector->status != connector_status_connected)
501		return -ENODEV;
502
503	seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);
504
505	return 0;
506}
507DEFINE_SHOW_ATTRIBUTE(output_bpc);
508
509static const struct file_operations drm_edid_fops = {
510	.owner = THIS_MODULE,
511	.open = edid_open,
512	.read = seq_read,
513	.llseek = seq_lseek,
514	.release = single_release,
515	.write = edid_write
516};
517
518
519static const struct file_operations drm_connector_fops = {
520	.owner = THIS_MODULE,
521	.open = connector_open,
522	.read = seq_read,
523	.llseek = seq_lseek,
524	.release = single_release,
525	.write = connector_write
526};
527
528static ssize_t
529audio_infoframe_read(struct file *filp, char __user *ubuf, size_t count, loff_t *ppos)
530{
531	struct drm_connector_hdmi_infoframe *infoframe;
532	struct drm_connector *connector;
533	union hdmi_infoframe *frame;
534	u8 buf[HDMI_INFOFRAME_SIZE(AUDIO)];
535	ssize_t len = 0;
536
537	connector = filp->private_data;
538	mutex_lock(&connector->hdmi.infoframes.lock);
539
540	infoframe = &connector->hdmi.infoframes.audio;
541	if (!infoframe->set)
542		goto out;
543
544	frame = &infoframe->data;
545	len = hdmi_infoframe_pack(frame, buf, sizeof(buf));
546	if (len < 0)
547		goto out;
548
549	len = simple_read_from_buffer(ubuf, count, ppos, buf, len);
550
551out:
552	mutex_unlock(&connector->hdmi.infoframes.lock);
553	return len;
554}
555
556static const struct file_operations audio_infoframe_fops = {
557	.owner   = THIS_MODULE,
558	.open    = simple_open,
559	.read    = audio_infoframe_read,
560};
561
562static int create_hdmi_audio_infoframe_file(struct drm_connector *connector,
563					    struct dentry *parent)
564{
565	struct dentry *file;
566
567	file = debugfs_create_file("audio", 0400, parent, connector, &audio_infoframe_fops);
568	if (IS_ERR(file))
569		return PTR_ERR(file);
570
571	return 0;
572}
573
574#define DEFINE_INFOFRAME_FILE(_f) \
575static ssize_t _f##_read_infoframe(struct file *filp, \
576				   char __user *ubuf, \
577				   size_t count,      \
578				   loff_t *ppos)      \
579{ \
580	struct drm_connector_hdmi_infoframe *infoframe; \
581	struct drm_connector_state *conn_state; \
582	struct drm_connector *connector; \
583	union hdmi_infoframe *frame; \
584	struct drm_device *dev; \
585	u8 buf[HDMI_INFOFRAME_SIZE(MAX)]; \
586	ssize_t len = 0; \
587	\
588	connector = filp->private_data; \
589	dev = connector->dev; \
590	\
591	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); \
592	\
593	conn_state = connector->state; \
594	infoframe = &conn_state->hdmi.infoframes._f; \
595	if (!infoframe->set) \
596		goto out; \
597	\
598	frame = &infoframe->data; \
599	len = hdmi_infoframe_pack(frame, buf, sizeof(buf)); \
600	if (len < 0) \
601		goto out; \
602	\
603	len = simple_read_from_buffer(ubuf, count, ppos, buf, len); \
604	\
605out: \
606	drm_modeset_unlock(&dev->mode_config.connection_mutex); \
607	return len; \
608} \
609\
610static const struct file_operations _f##_infoframe_fops = { \
611	.owner = THIS_MODULE, \
612	.open = simple_open, \
613	.read = _f##_read_infoframe, \
614}; \
615\
616static int create_hdmi_## _f ## _infoframe_file(struct drm_connector *connector, \
617						struct dentry *parent) \
618{ \
619	struct dentry *file; \
620	\
621	file = debugfs_create_file(#_f, 0400, parent, connector, &_f ## _infoframe_fops); \
622	if (IS_ERR(file)) \
623		return PTR_ERR(file); \
624	\
625	return 0; \
626}
627
628DEFINE_INFOFRAME_FILE(avi);
629DEFINE_INFOFRAME_FILE(hdmi);
630DEFINE_INFOFRAME_FILE(hdr_drm);
631DEFINE_INFOFRAME_FILE(spd);
632
633static int create_hdmi_infoframe_files(struct drm_connector *connector,
634				       struct dentry *parent)
635{
636	int ret;
637
638	ret = create_hdmi_audio_infoframe_file(connector, parent);
639	if (ret)
640		return ret;
641
642	ret = create_hdmi_avi_infoframe_file(connector, parent);
643	if (ret)
644		return ret;
645
646	ret = create_hdmi_hdmi_infoframe_file(connector, parent);
647	if (ret)
648		return ret;
649
650	ret = create_hdmi_hdr_drm_infoframe_file(connector, parent);
651	if (ret)
652		return ret;
653
654	ret = create_hdmi_spd_infoframe_file(connector, parent);
655	if (ret)
656		return ret;
657
658	return 0;
659}
660
661static void hdmi_debugfs_add(struct drm_connector *connector)
662{
663	struct dentry *dir;
664
665	if (!(connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
666	      connector->connector_type == DRM_MODE_CONNECTOR_HDMIB))
667		return;
668
669	dir = debugfs_create_dir("infoframes", connector->debugfs_entry);
670	if (IS_ERR(dir))
671		return;
672
673	create_hdmi_infoframe_files(connector, dir);
674}
675
676void drm_debugfs_connector_add(struct drm_connector *connector)
677{
678	struct drm_device *dev = connector->dev;
679	struct dentry *root;
680
681	if (!dev->debugfs_root)
682		return;
683
684	root = debugfs_create_dir(connector->name, dev->debugfs_root);
685	connector->debugfs_entry = root;
686
687	/* force */
688	debugfs_create_file("force", 0644, root, connector,
689			    &drm_connector_fops);
690
691	/* edid */
692	debugfs_create_file("edid_override", 0644, root, connector,
693			    &drm_edid_fops);
694
695	/* vrr range */
696	debugfs_create_file("vrr_range", 0444, root, connector,
697			    &vrr_range_fops);
698
699	/* max bpc */
700	debugfs_create_file("output_bpc", 0444, root, connector,
701			    &output_bpc_fops);
702
703	hdmi_debugfs_add(connector);
704
705	if (connector->funcs->debugfs_init)
706		connector->funcs->debugfs_init(connector, root);
707}
708
709void drm_debugfs_connector_remove(struct drm_connector *connector)
710{
711	if (!connector->debugfs_entry)
712		return;
713
714	debugfs_remove_recursive(connector->debugfs_entry);
715
716	connector->debugfs_entry = NULL;
717}
718
719void drm_debugfs_crtc_add(struct drm_crtc *crtc)
720{
721	struct drm_device *dev = crtc->dev;
722	struct dentry *root;
723	char *name;
724
725	name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
726	if (!name)
727		return;
728
729	root = debugfs_create_dir(name, dev->debugfs_root);
730	kfree(name);
731
732	crtc->debugfs_entry = root;
733
734	drm_debugfs_crtc_crc_add(crtc);
735}
736
737void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
738{
739	debugfs_remove_recursive(crtc->debugfs_entry);
740	crtc->debugfs_entry = NULL;
741}
742
743static int bridges_show(struct seq_file *m, void *data)
744{
745	struct drm_encoder *encoder = m->private;
746	struct drm_printer p = drm_seq_file_printer(m);
747	struct drm_bridge *bridge;
748	unsigned int idx = 0;
749
750	drm_for_each_bridge_in_chain(encoder, bridge) {
751		drm_printf(&p, "bridge[%d]: %ps\n", idx++, bridge->funcs);
752		drm_printf(&p, "\ttype: [%d] %s\n",
753			   bridge->type,
754			   drm_get_connector_type_name(bridge->type));
755
756		if (bridge->of_node)
757			drm_printf(&p, "\tOF: %pOFfc\n", bridge->of_node);
758
759		drm_printf(&p, "\tops: [0x%x]", bridge->ops);
760		if (bridge->ops & DRM_BRIDGE_OP_DETECT)
761			drm_puts(&p, " detect");
762		if (bridge->ops & DRM_BRIDGE_OP_EDID)
763			drm_puts(&p, " edid");
764		if (bridge->ops & DRM_BRIDGE_OP_HPD)
765			drm_puts(&p, " hpd");
766		if (bridge->ops & DRM_BRIDGE_OP_MODES)
767			drm_puts(&p, " modes");
768		if (bridge->ops & DRM_BRIDGE_OP_HDMI)
769			drm_puts(&p, " hdmi");
770		drm_puts(&p, "\n");
771	}
772
773	return 0;
774}
775DEFINE_SHOW_ATTRIBUTE(bridges);
776
777void drm_debugfs_encoder_add(struct drm_encoder *encoder)
778{
779	struct drm_minor *minor = encoder->dev->primary;
780	struct dentry *root;
781	char *name;
782
783	name = kasprintf(GFP_KERNEL, "encoder-%d", encoder->index);
784	if (!name)
785		return;
786
787	root = debugfs_create_dir(name, minor->debugfs_root);
788	kfree(name);
789
790	encoder->debugfs_entry = root;
791
792	/* bridges list */
793	debugfs_create_file("bridges", 0444, root, encoder,
794			    &bridges_fops);
795
796	if (encoder->funcs && encoder->funcs->debugfs_init)
797		encoder->funcs->debugfs_init(encoder, root);
798}
799
800void drm_debugfs_encoder_remove(struct drm_encoder *encoder)
801{
802	debugfs_remove_recursive(encoder->debugfs_entry);
803	encoder->debugfs_entry = NULL;
804}