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1/*2 * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com3 *4 * Copyright 2008 Ben Gamari <bgamari@gmail.com>5 *6 * Permission is hereby granted, free of charge, to any person obtaining a7 * copy of this software and associated documentation files (the "Software"),8 * to deal in the Software without restriction, including without limitation9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,10 * and/or sell copies of the Software, and to permit persons to whom the11 * Software is furnished to do so, subject to the following conditions:12 *13 * The above copyright notice and this permission notice (including the next14 * paragraph) shall be included in all copies or substantial portions of the15 * Software.16 *17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR21 * 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 OR23 * 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_client.h>36#include <drm/drm_debugfs.h>37#include <drm/drm_device.h>38#include <drm/drm_drv.h>39#include <drm/drm_edid.h>40#include <drm/drm_file.h>41#include <drm/drm_gem.h>42#include <drm/drm_managed.h>43#include <drm/drm_gpuvm.h>44 45#include "drm_crtc_internal.h"46#include "drm_internal.h"47 48/***************************************************49 * Initialization, etc.50 **************************************************/51 52static int drm_name_info(struct seq_file *m, void *data)53{54 struct drm_debugfs_entry *entry = m->private;55 struct drm_device *dev = entry->dev;56 struct drm_master *master;57 58 mutex_lock(&dev->master_mutex);59 master = dev->master;60 seq_printf(m, "%s", dev->driver->name);61 if (dev->dev)62 seq_printf(m, " dev=%s", dev_name(dev->dev));63 if (master && master->unique)64 seq_printf(m, " master=%s", master->unique);65 if (dev->unique)66 seq_printf(m, " unique=%s", dev->unique);67 seq_printf(m, "\n");68 mutex_unlock(&dev->master_mutex);69 70 return 0;71}72 73static int drm_clients_info(struct seq_file *m, void *data)74{75 struct drm_debugfs_entry *entry = m->private;76 struct drm_device *dev = entry->dev;77 struct drm_file *priv;78 kuid_t uid;79 80 seq_printf(m,81 "%20s %5s %3s master a %5s %10s\n",82 "command",83 "tgid",84 "dev",85 "uid",86 "magic");87 88 /* dev->filelist is sorted youngest first, but we want to present89 * oldest first (i.e. kernel, servers, clients), so walk backwardss.90 */91 mutex_lock(&dev->filelist_mutex);92 list_for_each_entry_reverse(priv, &dev->filelist, lhead) {93 bool is_current_master = drm_is_current_master(priv);94 struct task_struct *task;95 struct pid *pid;96 97 rcu_read_lock(); /* Locks priv->pid and pid_task()->comm! */98 pid = rcu_dereference(priv->pid);99 task = pid_task(pid, PIDTYPE_TGID);100 uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;101 seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n",102 task ? task->comm : "<unknown>",103 pid_vnr(pid),104 priv->minor->index,105 is_current_master ? 'y' : 'n',106 priv->authenticated ? 'y' : 'n',107 from_kuid_munged(seq_user_ns(m), uid),108 priv->magic);109 rcu_read_unlock();110 }111 mutex_unlock(&dev->filelist_mutex);112 return 0;113}114 115static int drm_gem_one_name_info(int id, void *ptr, void *data)116{117 struct drm_gem_object *obj = ptr;118 struct seq_file *m = data;119 120 seq_printf(m, "%6d %8zd %7d %8d\n",121 obj->name, obj->size,122 obj->handle_count,123 kref_read(&obj->refcount));124 return 0;125}126 127static int drm_gem_name_info(struct seq_file *m, void *data)128{129 struct drm_debugfs_entry *entry = m->private;130 struct drm_device *dev = entry->dev;131 132 seq_printf(m, " name size handles refcount\n");133 134 mutex_lock(&dev->object_name_lock);135 idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);136 mutex_unlock(&dev->object_name_lock);137 138 return 0;139}140 141static const struct drm_debugfs_info drm_debugfs_list[] = {142 {"name", drm_name_info, 0},143 {"clients", drm_clients_info, 0},144 {"gem_names", drm_gem_name_info, DRIVER_GEM},145};146#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)147 148 149static int drm_debugfs_open(struct inode *inode, struct file *file)150{151 struct drm_info_node *node = inode->i_private;152 153 if (!device_is_registered(node->minor->kdev))154 return -ENODEV;155 156 return single_open(file, node->info_ent->show, node);157}158 159static int drm_debugfs_entry_open(struct inode *inode, struct file *file)160{161 struct drm_debugfs_entry *entry = inode->i_private;162 struct drm_debugfs_info *node = &entry->file;163 struct drm_minor *minor = entry->dev->primary ?: entry->dev->accel;164 165 if (!device_is_registered(minor->kdev))166 return -ENODEV;167 168 return single_open(file, node->show, entry);169}170 171static const struct file_operations drm_debugfs_entry_fops = {172 .owner = THIS_MODULE,173 .open = drm_debugfs_entry_open,174 .read = seq_read,175 .llseek = seq_lseek,176 .release = single_release,177};178 179static const struct file_operations drm_debugfs_fops = {180 .owner = THIS_MODULE,181 .open = drm_debugfs_open,182 .read = seq_read,183 .llseek = seq_lseek,184 .release = single_release,185};186 187/**188 * drm_debugfs_gpuva_info - dump the given DRM GPU VA space189 * @m: pointer to the &seq_file to write190 * @gpuvm: the &drm_gpuvm representing the GPU VA space191 *192 * Dumps the GPU VA mappings of a given DRM GPU VA manager.193 *194 * For each DRM GPU VA space drivers should call this function from their195 * &drm_info_list's show callback.196 *197 * Returns: 0 on success, -ENODEV if the &gpuvm is not initialized198 */199int drm_debugfs_gpuva_info(struct seq_file *m,200 struct drm_gpuvm *gpuvm)201{202 struct drm_gpuva *va, *kva = &gpuvm->kernel_alloc_node;203 204 if (!gpuvm->name)205 return -ENODEV;206 207 seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n",208 gpuvm->name, gpuvm->mm_start, gpuvm->mm_start + gpuvm->mm_range);209 seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n",210 kva->va.addr, kva->va.addr + kva->va.range);211 seq_puts(m, "\n");212 seq_puts(m, " VAs | start | range | end | object | object offset\n");213 seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n");214 drm_gpuvm_for_each_va(va, gpuvm) {215 if (unlikely(va == kva))216 continue;217 218 seq_printf(m, " | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",219 va->va.addr, va->va.range, va->va.addr + va->va.range,220 (u64)(uintptr_t)va->gem.obj, va->gem.offset);221 }222 223 return 0;224}225EXPORT_SYMBOL(drm_debugfs_gpuva_info);226 227/**228 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM229 * minor230 * @files: The array of files to create231 * @count: The number of files given232 * @root: DRI debugfs dir entry.233 * @minor: device minor number234 *235 * Create a given set of debugfs files represented by an array of236 * &struct drm_info_list in the given root directory. These files will be removed237 * automatically on drm_debugfs_dev_fini().238 */239void drm_debugfs_create_files(const struct drm_info_list *files, int count,240 struct dentry *root, struct drm_minor *minor)241{242 struct drm_device *dev = minor->dev;243 struct drm_info_node *tmp;244 int i;245 246 for (i = 0; i < count; i++) {247 u32 features = files[i].driver_features;248 249 if (features && !drm_core_check_all_features(dev, features))250 continue;251 252 tmp = drmm_kzalloc(dev, sizeof(*tmp), GFP_KERNEL);253 if (tmp == NULL)254 continue;255 256 tmp->minor = minor;257 tmp->dent = debugfs_create_file(files[i].name,258 0444, root, tmp,259 &drm_debugfs_fops);260 tmp->info_ent = &files[i];261 }262}263EXPORT_SYMBOL(drm_debugfs_create_files);264 265int drm_debugfs_remove_files(const struct drm_info_list *files, int count,266 struct dentry *root, struct drm_minor *minor)267{268 int i;269 270 for (i = 0; i < count; i++) {271 struct dentry *dent = debugfs_lookup(files[i].name, root);272 273 if (!dent)274 continue;275 276 drmm_kfree(minor->dev, d_inode(dent)->i_private);277 debugfs_remove(dent);278 }279 return 0;280}281EXPORT_SYMBOL(drm_debugfs_remove_files);282 283/**284 * drm_debugfs_dev_init - create debugfs directory for the device285 * @dev: the device which we want to create the directory for286 * @root: the parent directory depending on the device type287 *288 * Creates the debugfs directory for the device under the given root directory.289 */290void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root)291{292 dev->debugfs_root = debugfs_create_dir(dev->unique, root);293}294 295/**296 * drm_debugfs_dev_fini - cleanup debugfs directory297 * @dev: the device to cleanup the debugfs stuff298 *299 * Remove the debugfs directory, might be called multiple times.300 */301void drm_debugfs_dev_fini(struct drm_device *dev)302{303 debugfs_remove_recursive(dev->debugfs_root);304 dev->debugfs_root = NULL;305}306 307void drm_debugfs_dev_register(struct drm_device *dev)308{309 drm_debugfs_add_files(dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES);310 311 if (drm_core_check_feature(dev, DRIVER_MODESET)) {312 drm_framebuffer_debugfs_init(dev);313 drm_client_debugfs_init(dev);314 }315 if (drm_drv_uses_atomic_modeset(dev))316 drm_atomic_debugfs_init(dev);317}318 319int drm_debugfs_register(struct drm_minor *minor, int minor_id,320 struct dentry *root)321{322 struct drm_device *dev = minor->dev;323 char name[64];324 325 sprintf(name, "%d", minor_id);326 minor->debugfs_symlink = debugfs_create_symlink(name, root,327 dev->unique);328 329 /* TODO: Only for compatibility with drivers */330 minor->debugfs_root = dev->debugfs_root;331 332 if (dev->driver->debugfs_init && dev->render != minor)333 dev->driver->debugfs_init(minor);334 335 return 0;336}337 338void drm_debugfs_unregister(struct drm_minor *minor)339{340 debugfs_remove(minor->debugfs_symlink);341 minor->debugfs_symlink = NULL;342}343 344/**345 * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list346 * @dev: drm device for the ioctl347 * @name: debugfs file name348 * @show: show callback349 * @data: driver-private data, should not be device-specific350 *351 * Add a given file entry to the DRM device debugfs file list to be created on352 * drm_debugfs_init.353 */354void drm_debugfs_add_file(struct drm_device *dev, const char *name,355 int (*show)(struct seq_file*, void*), void *data)356{357 struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL);358 359 if (!entry)360 return;361 362 entry->file.name = name;363 entry->file.show = show;364 entry->file.data = data;365 entry->dev = dev;366 367 debugfs_create_file(name, 0444, dev->debugfs_root, entry,368 &drm_debugfs_entry_fops);369}370EXPORT_SYMBOL(drm_debugfs_add_file);371 372/**373 * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list374 * @dev: drm device for the ioctl375 * @files: The array of files to create376 * @count: The number of files given377 *378 * Add a given set of debugfs files represented by an array of379 * &struct drm_debugfs_info in the DRM device debugfs file list.380 */381void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count)382{383 int i;384 385 for (i = 0; i < count; i++)386 drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data);387}388EXPORT_SYMBOL(drm_debugfs_add_files);389 390static int connector_show(struct seq_file *m, void *data)391{392 struct drm_connector *connector = m->private;393 394 seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));395 396 return 0;397}398 399static int connector_open(struct inode *inode, struct file *file)400{401 struct drm_connector *dev = inode->i_private;402 403 return single_open(file, connector_show, dev);404}405 406static ssize_t connector_write(struct file *file, const char __user *ubuf,407 size_t len, loff_t *offp)408{409 struct seq_file *m = file->private_data;410 struct drm_connector *connector = m->private;411 char buf[12];412 413 if (len > sizeof(buf) - 1)414 return -EINVAL;415 416 if (copy_from_user(buf, ubuf, len))417 return -EFAULT;418 419 buf[len] = '\0';420 421 if (sysfs_streq(buf, "on"))422 connector->force = DRM_FORCE_ON;423 else if (sysfs_streq(buf, "digital"))424 connector->force = DRM_FORCE_ON_DIGITAL;425 else if (sysfs_streq(buf, "off"))426 connector->force = DRM_FORCE_OFF;427 else if (sysfs_streq(buf, "unspecified"))428 connector->force = DRM_FORCE_UNSPECIFIED;429 else430 return -EINVAL;431 432 return len;433}434 435static int edid_show(struct seq_file *m, void *data)436{437 return drm_edid_override_show(m->private, m);438}439 440static int edid_open(struct inode *inode, struct file *file)441{442 struct drm_connector *dev = inode->i_private;443 444 return single_open(file, edid_show, dev);445}446 447static ssize_t edid_write(struct file *file, const char __user *ubuf,448 size_t len, loff_t *offp)449{450 struct seq_file *m = file->private_data;451 struct drm_connector *connector = m->private;452 char *buf;453 int ret;454 455 buf = memdup_user(ubuf, len);456 if (IS_ERR(buf))457 return PTR_ERR(buf);458 459 if (len == 5 && !strncmp(buf, "reset", 5))460 ret = drm_edid_override_reset(connector);461 else462 ret = drm_edid_override_set(connector, buf, len);463 464 kfree(buf);465 466 return ret ? ret : len;467}468 469/*470 * Returns the min and max vrr vfreq through the connector's debugfs file.471 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range472 */473static int vrr_range_show(struct seq_file *m, void *data)474{475 struct drm_connector *connector = m->private;476 477 if (connector->status != connector_status_connected)478 return -ENODEV;479 480 seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq);481 seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq);482 483 return 0;484}485DEFINE_SHOW_ATTRIBUTE(vrr_range);486 487/*488 * Returns Connector's max supported bpc through debugfs file.489 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc490 */491static int output_bpc_show(struct seq_file *m, void *data)492{493 struct drm_connector *connector = m->private;494 495 if (connector->status != connector_status_connected)496 return -ENODEV;497 498 seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);499 500 return 0;501}502DEFINE_SHOW_ATTRIBUTE(output_bpc);503 504static const struct file_operations drm_edid_fops = {505 .owner = THIS_MODULE,506 .open = edid_open,507 .read = seq_read,508 .llseek = seq_lseek,509 .release = single_release,510 .write = edid_write511};512 513 514static const struct file_operations drm_connector_fops = {515 .owner = THIS_MODULE,516 .open = connector_open,517 .read = seq_read,518 .llseek = seq_lseek,519 .release = single_release,520 .write = connector_write521};522 523static ssize_t524audio_infoframe_read(struct file *filp, char __user *ubuf, size_t count, loff_t *ppos)525{526 struct drm_connector_hdmi_infoframe *infoframe;527 struct drm_connector *connector;528 union hdmi_infoframe *frame;529 u8 buf[HDMI_INFOFRAME_SIZE(AUDIO)];530 ssize_t len = 0;531 532 connector = filp->private_data;533 mutex_lock(&connector->hdmi.infoframes.lock);534 535 infoframe = &connector->hdmi.infoframes.audio;536 if (!infoframe->set)537 goto out;538 539 frame = &infoframe->data;540 len = hdmi_infoframe_pack(frame, buf, sizeof(buf));541 if (len < 0)542 goto out;543 544 len = simple_read_from_buffer(ubuf, count, ppos, buf, len);545 546out:547 mutex_unlock(&connector->hdmi.infoframes.lock);548 return len;549}550 551static const struct file_operations audio_infoframe_fops = {552 .owner = THIS_MODULE,553 .open = simple_open,554 .read = audio_infoframe_read,555};556 557static int create_hdmi_audio_infoframe_file(struct drm_connector *connector,558 struct dentry *parent)559{560 struct dentry *file;561 562 file = debugfs_create_file("audio", 0400, parent, connector, &audio_infoframe_fops);563 if (IS_ERR(file))564 return PTR_ERR(file);565 566 return 0;567}568 569#define DEFINE_INFOFRAME_FILE(_f) \570static ssize_t _f##_read_infoframe(struct file *filp, \571 char __user *ubuf, \572 size_t count, \573 loff_t *ppos) \574{ \575 struct drm_connector_hdmi_infoframe *infoframe; \576 struct drm_connector_state *conn_state; \577 struct drm_connector *connector; \578 union hdmi_infoframe *frame; \579 struct drm_device *dev; \580 u8 buf[HDMI_INFOFRAME_SIZE(MAX)]; \581 ssize_t len = 0; \582 \583 connector = filp->private_data; \584 dev = connector->dev; \585 \586 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); \587 \588 conn_state = connector->state; \589 infoframe = &conn_state->hdmi.infoframes._f; \590 if (!infoframe->set) \591 goto out; \592 \593 frame = &infoframe->data; \594 len = hdmi_infoframe_pack(frame, buf, sizeof(buf)); \595 if (len < 0) \596 goto out; \597 \598 len = simple_read_from_buffer(ubuf, count, ppos, buf, len); \599 \600out: \601 drm_modeset_unlock(&dev->mode_config.connection_mutex); \602 return len; \603} \604\605static const struct file_operations _f##_infoframe_fops = { \606 .owner = THIS_MODULE, \607 .open = simple_open, \608 .read = _f##_read_infoframe, \609}; \610\611static int create_hdmi_## _f ## _infoframe_file(struct drm_connector *connector, \612 struct dentry *parent) \613{ \614 struct dentry *file; \615 \616 file = debugfs_create_file(#_f, 0400, parent, connector, &_f ## _infoframe_fops); \617 if (IS_ERR(file)) \618 return PTR_ERR(file); \619 \620 return 0; \621}622 623DEFINE_INFOFRAME_FILE(avi);624DEFINE_INFOFRAME_FILE(hdmi);625DEFINE_INFOFRAME_FILE(hdr_drm);626DEFINE_INFOFRAME_FILE(spd);627 628static int create_hdmi_infoframe_files(struct drm_connector *connector,629 struct dentry *parent)630{631 int ret;632 633 ret = create_hdmi_audio_infoframe_file(connector, parent);634 if (ret)635 return ret;636 637 ret = create_hdmi_avi_infoframe_file(connector, parent);638 if (ret)639 return ret;640 641 ret = create_hdmi_hdmi_infoframe_file(connector, parent);642 if (ret)643 return ret;644 645 ret = create_hdmi_hdr_drm_infoframe_file(connector, parent);646 if (ret)647 return ret;648 649 ret = create_hdmi_spd_infoframe_file(connector, parent);650 if (ret)651 return ret;652 653 return 0;654}655 656static void hdmi_debugfs_add(struct drm_connector *connector)657{658 struct dentry *dir;659 660 if (!(connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||661 connector->connector_type == DRM_MODE_CONNECTOR_HDMIB))662 return;663 664 dir = debugfs_create_dir("infoframes", connector->debugfs_entry);665 if (IS_ERR(dir))666 return;667 668 create_hdmi_infoframe_files(connector, dir);669}670 671void drm_debugfs_connector_add(struct drm_connector *connector)672{673 struct drm_device *dev = connector->dev;674 struct dentry *root;675 676 if (!dev->debugfs_root)677 return;678 679 root = debugfs_create_dir(connector->name, dev->debugfs_root);680 connector->debugfs_entry = root;681 682 /* force */683 debugfs_create_file("force", 0644, root, connector,684 &drm_connector_fops);685 686 /* edid */687 debugfs_create_file("edid_override", 0644, root, connector,688 &drm_edid_fops);689 690 /* vrr range */691 debugfs_create_file("vrr_range", 0444, root, connector,692 &vrr_range_fops);693 694 /* max bpc */695 debugfs_create_file("output_bpc", 0444, root, connector,696 &output_bpc_fops);697 698 hdmi_debugfs_add(connector);699 700 if (connector->funcs->debugfs_init)701 connector->funcs->debugfs_init(connector, root);702}703 704void drm_debugfs_connector_remove(struct drm_connector *connector)705{706 if (!connector->debugfs_entry)707 return;708 709 debugfs_remove_recursive(connector->debugfs_entry);710 711 connector->debugfs_entry = NULL;712}713 714void drm_debugfs_crtc_add(struct drm_crtc *crtc)715{716 struct drm_device *dev = crtc->dev;717 struct dentry *root;718 char *name;719 720 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);721 if (!name)722 return;723 724 root = debugfs_create_dir(name, dev->debugfs_root);725 kfree(name);726 727 crtc->debugfs_entry = root;728 729 drm_debugfs_crtc_crc_add(crtc);730}731 732void drm_debugfs_crtc_remove(struct drm_crtc *crtc)733{734 debugfs_remove_recursive(crtc->debugfs_entry);735 crtc->debugfs_entry = NULL;736}737 738static int bridges_show(struct seq_file *m, void *data)739{740 struct drm_encoder *encoder = m->private;741 struct drm_printer p = drm_seq_file_printer(m);742 struct drm_bridge *bridge;743 unsigned int idx = 0;744 745 drm_for_each_bridge_in_chain(encoder, bridge) {746 drm_printf(&p, "bridge[%d]: %ps\n", idx++, bridge->funcs);747 drm_printf(&p, "\ttype: [%d] %s\n",748 bridge->type,749 drm_get_connector_type_name(bridge->type));750 751 if (bridge->of_node)752 drm_printf(&p, "\tOF: %pOFfc\n", bridge->of_node);753 754 drm_printf(&p, "\tops: [0x%x]", bridge->ops);755 if (bridge->ops & DRM_BRIDGE_OP_DETECT)756 drm_puts(&p, " detect");757 if (bridge->ops & DRM_BRIDGE_OP_EDID)758 drm_puts(&p, " edid");759 if (bridge->ops & DRM_BRIDGE_OP_HPD)760 drm_puts(&p, " hpd");761 if (bridge->ops & DRM_BRIDGE_OP_MODES)762 drm_puts(&p, " modes");763 if (bridge->ops & DRM_BRIDGE_OP_HDMI)764 drm_puts(&p, " hdmi");765 drm_puts(&p, "\n");766 }767 768 return 0;769}770DEFINE_SHOW_ATTRIBUTE(bridges);771 772void drm_debugfs_encoder_add(struct drm_encoder *encoder)773{774 struct drm_minor *minor = encoder->dev->primary;775 struct dentry *root;776 char *name;777 778 name = kasprintf(GFP_KERNEL, "encoder-%d", encoder->index);779 if (!name)780 return;781 782 root = debugfs_create_dir(name, minor->debugfs_root);783 kfree(name);784 785 encoder->debugfs_entry = root;786 787 /* bridges list */788 debugfs_create_file("bridges", 0444, root, encoder,789 &bridges_fops);790 791 if (encoder->funcs && encoder->funcs->debugfs_init)792 encoder->funcs->debugfs_init(encoder, root);793}794 795void drm_debugfs_encoder_remove(struct drm_encoder *encoder)796{797 debugfs_remove_recursive(encoder->debugfs_entry);798 encoder->debugfs_entry = NULL;799}800