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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_client.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
42#include "drm_crtc_internal.h"
43#include "drm_internal.h"
44
45#if defined(CONFIG_DEBUG_FS)
46
47/***************************************************
48 * Initialization, etc.
49 **************************************************/
50
51static int drm_name_info(struct seq_file *m, void *data)
52{
53 struct drm_info_node *node = (struct drm_info_node *) m->private;
54 struct drm_minor *minor = node->minor;
55 struct drm_device *dev = minor->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_info_node *node = (struct drm_info_node *) m->private;
76 struct drm_device *dev = node->minor->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 "pid",
84 "dev",
85 "uid",
86 "magic");
87
88 /* dev->filelist is sorted youngest first, but we want to present
89 * 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 struct task_struct *task;
94
95 rcu_read_lock(); /* locks pid_task()->comm */
96 task = pid_task(priv->pid, PIDTYPE_PID);
97 uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
98 seq_printf(m, "%20s %5d %3d %c %c %5d %10u\n",
99 task ? task->comm : "<unknown>",
100 pid_vnr(priv->pid),
101 priv->minor->index,
102 drm_is_current_master(priv) ? 'y' : 'n',
103 priv->authenticated ? 'y' : 'n',
104 from_kuid_munged(seq_user_ns(m), uid),
105 priv->magic);
106 rcu_read_unlock();
107 }
108 mutex_unlock(&dev->filelist_mutex);
109 return 0;
110}
111
112static int drm_gem_one_name_info(int id, void *ptr, void *data)
113{
114 struct drm_gem_object *obj = ptr;
115 struct seq_file *m = data;
116
117 seq_printf(m, "%6d %8zd %7d %8d\n",
118 obj->name, obj->size,
119 obj->handle_count,
120 kref_read(&obj->refcount));
121 return 0;
122}
123
124static int drm_gem_name_info(struct seq_file *m, void *data)
125{
126 struct drm_info_node *node = (struct drm_info_node *) m->private;
127 struct drm_device *dev = node->minor->dev;
128
129 seq_printf(m, " name size handles refcount\n");
130
131 mutex_lock(&dev->object_name_lock);
132 idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
133 mutex_unlock(&dev->object_name_lock);
134
135 return 0;
136}
137
138static const struct drm_info_list drm_debugfs_list[] = {
139 {"name", drm_name_info, 0},
140 {"clients", drm_clients_info, 0},
141 {"gem_names", drm_gem_name_info, DRIVER_GEM},
142};
143#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
144
145
146static int drm_debugfs_open(struct inode *inode, struct file *file)
147{
148 struct drm_info_node *node = inode->i_private;
149
150 return single_open(file, node->info_ent->show, node);
151}
152
153
154static const struct file_operations drm_debugfs_fops = {
155 .owner = THIS_MODULE,
156 .open = drm_debugfs_open,
157 .read = seq_read,
158 .llseek = seq_lseek,
159 .release = single_release,
160};
161
162
163/**
164 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
165 * minor
166 * @files: The array of files to create
167 * @count: The number of files given
168 * @root: DRI debugfs dir entry.
169 * @minor: device minor number
170 *
171 * Create a given set of debugfs files represented by an array of
172 * &struct drm_info_list in the given root directory. These files will be removed
173 * automatically on drm_debugfs_cleanup().
174 */
175void drm_debugfs_create_files(const struct drm_info_list *files, int count,
176 struct dentry *root, struct drm_minor *minor)
177{
178 struct drm_device *dev = minor->dev;
179 struct drm_info_node *tmp;
180 int i;
181
182 for (i = 0; i < count; i++) {
183 u32 features = files[i].driver_features;
184
185 if (features && !drm_core_check_all_features(dev, features))
186 continue;
187
188 tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
189 if (tmp == NULL)
190 continue;
191
192 tmp->minor = minor;
193 tmp->dent = debugfs_create_file(files[i].name,
194 S_IFREG | S_IRUGO, root, tmp,
195 &drm_debugfs_fops);
196 tmp->info_ent = &files[i];
197
198 mutex_lock(&minor->debugfs_lock);
199 list_add(&tmp->list, &minor->debugfs_list);
200 mutex_unlock(&minor->debugfs_lock);
201 }
202}
203EXPORT_SYMBOL(drm_debugfs_create_files);
204
205int drm_debugfs_init(struct drm_minor *minor, int minor_id,
206 struct dentry *root)
207{
208 struct drm_device *dev = minor->dev;
209 char name[64];
210
211 INIT_LIST_HEAD(&minor->debugfs_list);
212 mutex_init(&minor->debugfs_lock);
213 sprintf(name, "%d", minor_id);
214 minor->debugfs_root = debugfs_create_dir(name, root);
215
216 drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
217 minor->debugfs_root, minor);
218
219 if (drm_drv_uses_atomic_modeset(dev)) {
220 drm_atomic_debugfs_init(minor);
221 }
222
223 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
224 drm_framebuffer_debugfs_init(minor);
225
226 drm_client_debugfs_init(minor);
227 }
228
229 if (dev->driver->debugfs_init)
230 dev->driver->debugfs_init(minor);
231
232 return 0;
233}
234
235
236int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
237 struct drm_minor *minor)
238{
239 struct list_head *pos, *q;
240 struct drm_info_node *tmp;
241 int i;
242
243 mutex_lock(&minor->debugfs_lock);
244 for (i = 0; i < count; i++) {
245 list_for_each_safe(pos, q, &minor->debugfs_list) {
246 tmp = list_entry(pos, struct drm_info_node, list);
247 if (tmp->info_ent == &files[i]) {
248 debugfs_remove(tmp->dent);
249 list_del(pos);
250 kfree(tmp);
251 }
252 }
253 }
254 mutex_unlock(&minor->debugfs_lock);
255 return 0;
256}
257EXPORT_SYMBOL(drm_debugfs_remove_files);
258
259static void drm_debugfs_remove_all_files(struct drm_minor *minor)
260{
261 struct drm_info_node *node, *tmp;
262
263 mutex_lock(&minor->debugfs_lock);
264 list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) {
265 debugfs_remove(node->dent);
266 list_del(&node->list);
267 kfree(node);
268 }
269 mutex_unlock(&minor->debugfs_lock);
270}
271
272void drm_debugfs_cleanup(struct drm_minor *minor)
273{
274 if (!minor->debugfs_root)
275 return;
276
277 drm_debugfs_remove_all_files(minor);
278
279 debugfs_remove_recursive(minor->debugfs_root);
280 minor->debugfs_root = NULL;
281}
282
283static int connector_show(struct seq_file *m, void *data)
284{
285 struct drm_connector *connector = m->private;
286
287 seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
288
289 return 0;
290}
291
292static int connector_open(struct inode *inode, struct file *file)
293{
294 struct drm_connector *dev = inode->i_private;
295
296 return single_open(file, connector_show, dev);
297}
298
299static ssize_t connector_write(struct file *file, const char __user *ubuf,
300 size_t len, loff_t *offp)
301{
302 struct seq_file *m = file->private_data;
303 struct drm_connector *connector = m->private;
304 char buf[12];
305
306 if (len > sizeof(buf) - 1)
307 return -EINVAL;
308
309 if (copy_from_user(buf, ubuf, len))
310 return -EFAULT;
311
312 buf[len] = '\0';
313
314 if (sysfs_streq(buf, "on"))
315 connector->force = DRM_FORCE_ON;
316 else if (sysfs_streq(buf, "digital"))
317 connector->force = DRM_FORCE_ON_DIGITAL;
318 else if (sysfs_streq(buf, "off"))
319 connector->force = DRM_FORCE_OFF;
320 else if (sysfs_streq(buf, "unspecified"))
321 connector->force = DRM_FORCE_UNSPECIFIED;
322 else
323 return -EINVAL;
324
325 return len;
326}
327
328static int edid_show(struct seq_file *m, void *data)
329{
330 struct drm_connector *connector = m->private;
331 struct drm_property_blob *edid = connector->edid_blob_ptr;
332
333 if (connector->override_edid && edid)
334 seq_write(m, edid->data, edid->length);
335
336 return 0;
337}
338
339static int edid_open(struct inode *inode, struct file *file)
340{
341 struct drm_connector *dev = inode->i_private;
342
343 return single_open(file, edid_show, dev);
344}
345
346static ssize_t edid_write(struct file *file, const char __user *ubuf,
347 size_t len, loff_t *offp)
348{
349 struct seq_file *m = file->private_data;
350 struct drm_connector *connector = m->private;
351 char *buf;
352 struct edid *edid;
353 int ret;
354
355 buf = memdup_user(ubuf, len);
356 if (IS_ERR(buf))
357 return PTR_ERR(buf);
358
359 edid = (struct edid *) buf;
360
361 if (len == 5 && !strncmp(buf, "reset", 5)) {
362 connector->override_edid = false;
363 ret = drm_connector_update_edid_property(connector, NULL);
364 } else if (len < EDID_LENGTH ||
365 EDID_LENGTH * (1 + edid->extensions) > len)
366 ret = -EINVAL;
367 else {
368 connector->override_edid = false;
369 ret = drm_connector_update_edid_property(connector, edid);
370 if (!ret)
371 connector->override_edid = true;
372 }
373
374 kfree(buf);
375
376 return (ret) ? ret : len;
377}
378
379/*
380 * Returns the min and max vrr vfreq through the connector's debugfs file.
381 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
382 */
383static int vrr_range_show(struct seq_file *m, void *data)
384{
385 struct drm_connector *connector = m->private;
386
387 if (connector->status != connector_status_connected)
388 return -ENODEV;
389
390 seq_printf(m, "Min: %u\n", (u8)connector->display_info.monitor_range.min_vfreq);
391 seq_printf(m, "Max: %u\n", (u8)connector->display_info.monitor_range.max_vfreq);
392
393 return 0;
394}
395DEFINE_SHOW_ATTRIBUTE(vrr_range);
396
397static const struct file_operations drm_edid_fops = {
398 .owner = THIS_MODULE,
399 .open = edid_open,
400 .read = seq_read,
401 .llseek = seq_lseek,
402 .release = single_release,
403 .write = edid_write
404};
405
406
407static const struct file_operations drm_connector_fops = {
408 .owner = THIS_MODULE,
409 .open = connector_open,
410 .read = seq_read,
411 .llseek = seq_lseek,
412 .release = single_release,
413 .write = connector_write
414};
415
416void drm_debugfs_connector_add(struct drm_connector *connector)
417{
418 struct drm_minor *minor = connector->dev->primary;
419 struct dentry *root;
420
421 if (!minor->debugfs_root)
422 return;
423
424 root = debugfs_create_dir(connector->name, minor->debugfs_root);
425 connector->debugfs_entry = root;
426
427 /* force */
428 debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector,
429 &drm_connector_fops);
430
431 /* edid */
432 debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector,
433 &drm_edid_fops);
434
435 /* vrr range */
436 debugfs_create_file("vrr_range", S_IRUGO, root, connector,
437 &vrr_range_fops);
438}
439
440void drm_debugfs_connector_remove(struct drm_connector *connector)
441{
442 if (!connector->debugfs_entry)
443 return;
444
445 debugfs_remove_recursive(connector->debugfs_entry);
446
447 connector->debugfs_entry = NULL;
448}
449
450void drm_debugfs_crtc_add(struct drm_crtc *crtc)
451{
452 struct drm_minor *minor = crtc->dev->primary;
453 struct dentry *root;
454 char *name;
455
456 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
457 if (!name)
458 return;
459
460 root = debugfs_create_dir(name, minor->debugfs_root);
461 kfree(name);
462
463 crtc->debugfs_entry = root;
464
465 drm_debugfs_crtc_crc_add(crtc);
466}
467
468void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
469{
470 debugfs_remove_recursive(crtc->debugfs_entry);
471 crtc->debugfs_entry = NULL;
472}
473
474#endif /* CONFIG_DEBUG_FS */
1/**
2 * \file drm_debugfs.c
3 * debugfs support for DRM
4 *
5 * \author Ben Gamari <bgamari@gmail.com>
6 */
7
8/*
9 * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
10 *
11 * Copyright 2008 Ben Gamari <bgamari@gmail.com>
12 *
13 * Permission is hereby granted, free of charge, to any person obtaining a
14 * copy of this software and associated documentation files (the "Software"),
15 * to deal in the Software without restriction, including without limitation
16 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
17 * and/or sell copies of the Software, and to permit persons to whom the
18 * Software is furnished to do so, subject to the following conditions:
19 *
20 * The above copyright notice and this permission notice (including the next
21 * paragraph) shall be included in all copies or substantial portions of the
22 * Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
27 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
28 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
29 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
30 * OTHER DEALINGS IN THE SOFTWARE.
31 */
32
33#include <linux/debugfs.h>
34#include <linux/seq_file.h>
35#include <linux/slab.h>
36#include <linux/export.h>
37#include <drm/drmP.h>
38#include <drm/drm_edid.h>
39#include <drm/drm_atomic.h>
40#include "drm_internal.h"
41
42#if defined(CONFIG_DEBUG_FS)
43
44/***************************************************
45 * Initialization, etc.
46 **************************************************/
47
48static const struct drm_info_list drm_debugfs_list[] = {
49 {"name", drm_name_info, 0},
50 {"clients", drm_clients_info, 0},
51 {"gem_names", drm_gem_name_info, DRIVER_GEM},
52};
53#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
54
55
56static int drm_debugfs_open(struct inode *inode, struct file *file)
57{
58 struct drm_info_node *node = inode->i_private;
59
60 return single_open(file, node->info_ent->show, node);
61}
62
63
64static const struct file_operations drm_debugfs_fops = {
65 .owner = THIS_MODULE,
66 .open = drm_debugfs_open,
67 .read = seq_read,
68 .llseek = seq_lseek,
69 .release = single_release,
70};
71
72
73/**
74 * Initialize a given set of debugfs files for a device
75 *
76 * \param files The array of files to create
77 * \param count The number of files given
78 * \param root DRI debugfs dir entry.
79 * \param minor device minor number
80 * \return Zero on success, non-zero on failure
81 *
82 * Create a given set of debugfs files represented by an array of
83 * gdm_debugfs_lists in the given root directory.
84 */
85int drm_debugfs_create_files(const struct drm_info_list *files, int count,
86 struct dentry *root, struct drm_minor *minor)
87{
88 struct drm_device *dev = minor->dev;
89 struct dentry *ent;
90 struct drm_info_node *tmp;
91 int i, ret;
92
93 for (i = 0; i < count; i++) {
94 u32 features = files[i].driver_features;
95
96 if (features != 0 &&
97 (dev->driver->driver_features & features) != features)
98 continue;
99
100 tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
101 if (tmp == NULL) {
102 ret = -1;
103 goto fail;
104 }
105 ent = debugfs_create_file(files[i].name, S_IFREG | S_IRUGO,
106 root, tmp, &drm_debugfs_fops);
107 if (!ent) {
108 DRM_ERROR("Cannot create /sys/kernel/debug/dri/%pd/%s\n",
109 root, files[i].name);
110 kfree(tmp);
111 ret = -1;
112 goto fail;
113 }
114
115 tmp->minor = minor;
116 tmp->dent = ent;
117 tmp->info_ent = &files[i];
118
119 mutex_lock(&minor->debugfs_lock);
120 list_add(&tmp->list, &minor->debugfs_list);
121 mutex_unlock(&minor->debugfs_lock);
122 }
123 return 0;
124
125fail:
126 drm_debugfs_remove_files(files, count, minor);
127 return ret;
128}
129EXPORT_SYMBOL(drm_debugfs_create_files);
130
131/**
132 * Initialize the DRI debugfs filesystem for a device
133 *
134 * \param dev DRM device
135 * \param minor device minor number
136 * \param root DRI debugfs dir entry.
137 *
138 * Create the DRI debugfs root entry "/sys/kernel/debug/dri", the device debugfs root entry
139 * "/sys/kernel/debug/dri/%minor%/", and each entry in debugfs_list as
140 * "/sys/kernel/debug/dri/%minor%/%name%".
141 */
142int drm_debugfs_init(struct drm_minor *minor, int minor_id,
143 struct dentry *root)
144{
145 struct drm_device *dev = minor->dev;
146 char name[64];
147 int ret;
148
149 INIT_LIST_HEAD(&minor->debugfs_list);
150 mutex_init(&minor->debugfs_lock);
151 sprintf(name, "%d", minor_id);
152 minor->debugfs_root = debugfs_create_dir(name, root);
153 if (!minor->debugfs_root) {
154 DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name);
155 return -1;
156 }
157
158 ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
159 minor->debugfs_root, minor);
160 if (ret) {
161 debugfs_remove(minor->debugfs_root);
162 minor->debugfs_root = NULL;
163 DRM_ERROR("Failed to create core drm debugfs files\n");
164 return ret;
165 }
166
167 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
168 ret = drm_atomic_debugfs_init(minor);
169 if (ret) {
170 DRM_ERROR("Failed to create atomic debugfs files\n");
171 return ret;
172 }
173 }
174
175 if (dev->driver->debugfs_init) {
176 ret = dev->driver->debugfs_init(minor);
177 if (ret) {
178 DRM_ERROR("DRM: Driver failed to initialize "
179 "/sys/kernel/debug/dri.\n");
180 return ret;
181 }
182 }
183 return 0;
184}
185
186
187/**
188 * Remove a list of debugfs files
189 *
190 * \param files The list of files
191 * \param count The number of files
192 * \param minor The minor of which we should remove the files
193 * \return always zero.
194 *
195 * Remove all debugfs entries created by debugfs_init().
196 */
197int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
198 struct drm_minor *minor)
199{
200 struct list_head *pos, *q;
201 struct drm_info_node *tmp;
202 int i;
203
204 mutex_lock(&minor->debugfs_lock);
205 for (i = 0; i < count; i++) {
206 list_for_each_safe(pos, q, &minor->debugfs_list) {
207 tmp = list_entry(pos, struct drm_info_node, list);
208 if (tmp->info_ent == &files[i]) {
209 debugfs_remove(tmp->dent);
210 list_del(pos);
211 kfree(tmp);
212 }
213 }
214 }
215 mutex_unlock(&minor->debugfs_lock);
216 return 0;
217}
218EXPORT_SYMBOL(drm_debugfs_remove_files);
219
220/**
221 * Cleanup the debugfs filesystem resources.
222 *
223 * \param minor device minor number.
224 * \return always zero.
225 *
226 * Remove all debugfs entries created by debugfs_init().
227 */
228int drm_debugfs_cleanup(struct drm_minor *minor)
229{
230 struct drm_device *dev = minor->dev;
231 int ret;
232
233 if (!minor->debugfs_root)
234 return 0;
235
236 if (dev->driver->debugfs_cleanup)
237 dev->driver->debugfs_cleanup(minor);
238
239 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
240 ret = drm_atomic_debugfs_cleanup(minor);
241 if (ret) {
242 DRM_ERROR("DRM: Failed to remove atomic debugfs entries\n");
243 return ret;
244 }
245 }
246
247 drm_debugfs_remove_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, minor);
248
249 debugfs_remove(minor->debugfs_root);
250 minor->debugfs_root = NULL;
251
252 return 0;
253}
254
255static int connector_show(struct seq_file *m, void *data)
256{
257 struct drm_connector *connector = m->private;
258 const char *status;
259
260 switch (connector->force) {
261 case DRM_FORCE_ON:
262 status = "on\n";
263 break;
264
265 case DRM_FORCE_ON_DIGITAL:
266 status = "digital\n";
267 break;
268
269 case DRM_FORCE_OFF:
270 status = "off\n";
271 break;
272
273 case DRM_FORCE_UNSPECIFIED:
274 status = "unspecified\n";
275 break;
276
277 default:
278 return 0;
279 }
280
281 seq_puts(m, status);
282
283 return 0;
284}
285
286static int connector_open(struct inode *inode, struct file *file)
287{
288 struct drm_connector *dev = inode->i_private;
289
290 return single_open(file, connector_show, dev);
291}
292
293static ssize_t connector_write(struct file *file, const char __user *ubuf,
294 size_t len, loff_t *offp)
295{
296 struct seq_file *m = file->private_data;
297 struct drm_connector *connector = m->private;
298 char buf[12];
299
300 if (len > sizeof(buf) - 1)
301 return -EINVAL;
302
303 if (copy_from_user(buf, ubuf, len))
304 return -EFAULT;
305
306 buf[len] = '\0';
307
308 if (!strcmp(buf, "on"))
309 connector->force = DRM_FORCE_ON;
310 else if (!strcmp(buf, "digital"))
311 connector->force = DRM_FORCE_ON_DIGITAL;
312 else if (!strcmp(buf, "off"))
313 connector->force = DRM_FORCE_OFF;
314 else if (!strcmp(buf, "unspecified"))
315 connector->force = DRM_FORCE_UNSPECIFIED;
316 else
317 return -EINVAL;
318
319 return len;
320}
321
322static int edid_show(struct seq_file *m, void *data)
323{
324 struct drm_connector *connector = m->private;
325 struct drm_property_blob *edid = connector->edid_blob_ptr;
326
327 if (connector->override_edid && edid)
328 seq_write(m, edid->data, edid->length);
329
330 return 0;
331}
332
333static int edid_open(struct inode *inode, struct file *file)
334{
335 struct drm_connector *dev = inode->i_private;
336
337 return single_open(file, edid_show, dev);
338}
339
340static ssize_t edid_write(struct file *file, const char __user *ubuf,
341 size_t len, loff_t *offp)
342{
343 struct seq_file *m = file->private_data;
344 struct drm_connector *connector = m->private;
345 char *buf;
346 struct edid *edid;
347 int ret;
348
349 buf = memdup_user(ubuf, len);
350 if (IS_ERR(buf))
351 return PTR_ERR(buf);
352
353 edid = (struct edid *) buf;
354
355 if (len == 5 && !strncmp(buf, "reset", 5)) {
356 connector->override_edid = false;
357 ret = drm_mode_connector_update_edid_property(connector, NULL);
358 } else if (len < EDID_LENGTH ||
359 EDID_LENGTH * (1 + edid->extensions) > len)
360 ret = -EINVAL;
361 else {
362 connector->override_edid = false;
363 ret = drm_mode_connector_update_edid_property(connector, edid);
364 if (!ret)
365 connector->override_edid = true;
366 }
367
368 kfree(buf);
369
370 return (ret) ? ret : len;
371}
372
373static const struct file_operations drm_edid_fops = {
374 .owner = THIS_MODULE,
375 .open = edid_open,
376 .read = seq_read,
377 .llseek = seq_lseek,
378 .release = single_release,
379 .write = edid_write
380};
381
382
383static const struct file_operations drm_connector_fops = {
384 .owner = THIS_MODULE,
385 .open = connector_open,
386 .read = seq_read,
387 .llseek = seq_lseek,
388 .release = single_release,
389 .write = connector_write
390};
391
392int drm_debugfs_connector_add(struct drm_connector *connector)
393{
394 struct drm_minor *minor = connector->dev->primary;
395 struct dentry *root, *ent;
396
397 if (!minor->debugfs_root)
398 return -1;
399
400 root = debugfs_create_dir(connector->name, minor->debugfs_root);
401 if (!root)
402 return -ENOMEM;
403
404 connector->debugfs_entry = root;
405
406 /* force */
407 ent = debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector,
408 &drm_connector_fops);
409 if (!ent)
410 goto error;
411
412 /* edid */
413 ent = debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root,
414 connector, &drm_edid_fops);
415 if (!ent)
416 goto error;
417
418 return 0;
419
420error:
421 debugfs_remove_recursive(connector->debugfs_entry);
422 connector->debugfs_entry = NULL;
423 return -ENOMEM;
424}
425
426void drm_debugfs_connector_remove(struct drm_connector *connector)
427{
428 if (!connector->debugfs_entry)
429 return;
430
431 debugfs_remove_recursive(connector->debugfs_entry);
432
433 connector->debugfs_entry = NULL;
434}
435
436int drm_debugfs_crtc_add(struct drm_crtc *crtc)
437{
438 struct drm_minor *minor = crtc->dev->primary;
439 struct dentry *root;
440 char *name;
441
442 name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
443 if (!name)
444 return -ENOMEM;
445
446 root = debugfs_create_dir(name, minor->debugfs_root);
447 kfree(name);
448 if (!root)
449 return -ENOMEM;
450
451 crtc->debugfs_entry = root;
452
453 if (drm_debugfs_crtc_crc_add(crtc))
454 goto error;
455
456 return 0;
457
458error:
459 drm_debugfs_crtc_remove(crtc);
460 return -ENOMEM;
461}
462
463void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
464{
465 debugfs_remove_recursive(crtc->debugfs_entry);
466 crtc->debugfs_entry = NULL;
467}
468
469#endif /* CONFIG_DEBUG_FS */