2 * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
4 * Copyright 2008 Ben Gamari <bgamari@gmail.com>
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:
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
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.
26 #include <linux/debugfs.h>
27 #include <linux/seq_file.h>
28 #include <linux/slab.h>
29 #include <linux/export.h>
31 #include <drm/drm_client.h>
32 #include <drm/drm_debugfs.h>
33 #include <drm/drm_edid.h>
34 #include <drm/drm_atomic.h>
37 #include "drm_internal.h"
38 #include "drm_crtc_internal.h"
40 #if defined(CONFIG_DEBUG_FS)
42 /***************************************************
43 * Initialization, etc.
44 **************************************************/
46 static const struct drm_info_list drm_debugfs_list
[] = {
47 {"name", drm_name_info
, 0},
48 {"clients", drm_clients_info
, 0},
49 {"gem_names", drm_gem_name_info
, DRIVER_GEM
},
51 #define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
54 static int drm_debugfs_open(struct inode
*inode
, struct file
*file
)
56 struct drm_info_node
*node
= inode
->i_private
;
58 return single_open(file
, node
->info_ent
->show
, node
);
62 static const struct file_operations drm_debugfs_fops
= {
64 .open
= drm_debugfs_open
,
67 .release
= single_release
,
72 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
74 * @files: The array of files to create
75 * @count: The number of files given
76 * @root: DRI debugfs dir entry.
77 * @minor: device minor number
79 * Create a given set of debugfs files represented by an array of
80 * &struct drm_info_list in the given root directory. These files will be removed
81 * automatically on drm_debugfs_cleanup().
83 int drm_debugfs_create_files(const struct drm_info_list
*files
, int count
,
84 struct dentry
*root
, struct drm_minor
*minor
)
86 struct drm_device
*dev
= minor
->dev
;
88 struct drm_info_node
*tmp
;
91 for (i
= 0; i
< count
; i
++) {
92 u32 features
= files
[i
].driver_features
;
95 (dev
->driver
->driver_features
& features
) != features
)
98 tmp
= kmalloc(sizeof(struct drm_info_node
), GFP_KERNEL
);
103 ent
= debugfs_create_file(files
[i
].name
, S_IFREG
| S_IRUGO
,
104 root
, tmp
, &drm_debugfs_fops
);
106 DRM_ERROR("Cannot create /sys/kernel/debug/dri/%pd/%s\n",
107 root
, files
[i
].name
);
115 tmp
->info_ent
= &files
[i
];
117 mutex_lock(&minor
->debugfs_lock
);
118 list_add(&tmp
->list
, &minor
->debugfs_list
);
119 mutex_unlock(&minor
->debugfs_lock
);
124 drm_debugfs_remove_files(files
, count
, minor
);
127 EXPORT_SYMBOL(drm_debugfs_create_files
);
129 int drm_debugfs_init(struct drm_minor
*minor
, int minor_id
,
132 struct drm_device
*dev
= minor
->dev
;
136 INIT_LIST_HEAD(&minor
->debugfs_list
);
137 mutex_init(&minor
->debugfs_lock
);
138 sprintf(name
, "%d", minor_id
);
139 minor
->debugfs_root
= debugfs_create_dir(name
, root
);
140 if (!minor
->debugfs_root
) {
141 DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name
);
145 ret
= drm_debugfs_create_files(drm_debugfs_list
, DRM_DEBUGFS_ENTRIES
,
146 minor
->debugfs_root
, minor
);
148 debugfs_remove(minor
->debugfs_root
);
149 minor
->debugfs_root
= NULL
;
150 DRM_ERROR("Failed to create core drm debugfs files\n");
154 if (drm_core_check_feature(dev
, DRIVER_ATOMIC
)) {
155 ret
= drm_atomic_debugfs_init(minor
);
157 DRM_ERROR("Failed to create atomic debugfs files\n");
162 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
163 ret
= drm_framebuffer_debugfs_init(minor
);
165 DRM_ERROR("Failed to create framebuffer debugfs file\n");
169 ret
= drm_client_debugfs_init(minor
);
171 DRM_ERROR("Failed to create client debugfs file\n");
176 if (dev
->driver
->debugfs_init
) {
177 ret
= dev
->driver
->debugfs_init(minor
);
179 DRM_ERROR("DRM: Driver failed to initialize "
180 "/sys/kernel/debug/dri.\n");
188 int drm_debugfs_remove_files(const struct drm_info_list
*files
, int count
,
189 struct drm_minor
*minor
)
191 struct list_head
*pos
, *q
;
192 struct drm_info_node
*tmp
;
195 mutex_lock(&minor
->debugfs_lock
);
196 for (i
= 0; i
< count
; i
++) {
197 list_for_each_safe(pos
, q
, &minor
->debugfs_list
) {
198 tmp
= list_entry(pos
, struct drm_info_node
, list
);
199 if (tmp
->info_ent
== &files
[i
]) {
200 debugfs_remove(tmp
->dent
);
206 mutex_unlock(&minor
->debugfs_lock
);
209 EXPORT_SYMBOL(drm_debugfs_remove_files
);
211 static void drm_debugfs_remove_all_files(struct drm_minor
*minor
)
213 struct drm_info_node
*node
, *tmp
;
215 mutex_lock(&minor
->debugfs_lock
);
216 list_for_each_entry_safe(node
, tmp
, &minor
->debugfs_list
, list
) {
217 debugfs_remove(node
->dent
);
218 list_del(&node
->list
);
221 mutex_unlock(&minor
->debugfs_lock
);
224 int drm_debugfs_cleanup(struct drm_minor
*minor
)
226 if (!minor
->debugfs_root
)
229 drm_debugfs_remove_all_files(minor
);
231 debugfs_remove_recursive(minor
->debugfs_root
);
232 minor
->debugfs_root
= NULL
;
237 static int connector_show(struct seq_file
*m
, void *data
)
239 struct drm_connector
*connector
= m
->private;
241 seq_printf(m
, "%s\n", drm_get_connector_force_name(connector
->force
));
246 static int connector_open(struct inode
*inode
, struct file
*file
)
248 struct drm_connector
*dev
= inode
->i_private
;
250 return single_open(file
, connector_show
, dev
);
253 static ssize_t
connector_write(struct file
*file
, const char __user
*ubuf
,
254 size_t len
, loff_t
*offp
)
256 struct seq_file
*m
= file
->private_data
;
257 struct drm_connector
*connector
= m
->private;
260 if (len
> sizeof(buf
) - 1)
263 if (copy_from_user(buf
, ubuf
, len
))
268 if (!strcmp(buf
, "on"))
269 connector
->force
= DRM_FORCE_ON
;
270 else if (!strcmp(buf
, "digital"))
271 connector
->force
= DRM_FORCE_ON_DIGITAL
;
272 else if (!strcmp(buf
, "off"))
273 connector
->force
= DRM_FORCE_OFF
;
274 else if (!strcmp(buf
, "unspecified"))
275 connector
->force
= DRM_FORCE_UNSPECIFIED
;
282 static int edid_show(struct seq_file
*m
, void *data
)
284 struct drm_connector
*connector
= m
->private;
285 struct drm_property_blob
*edid
= connector
->edid_blob_ptr
;
287 if (connector
->override_edid
&& edid
)
288 seq_write(m
, edid
->data
, edid
->length
);
293 static int edid_open(struct inode
*inode
, struct file
*file
)
295 struct drm_connector
*dev
= inode
->i_private
;
297 return single_open(file
, edid_show
, dev
);
300 static ssize_t
edid_write(struct file
*file
, const char __user
*ubuf
,
301 size_t len
, loff_t
*offp
)
303 struct seq_file
*m
= file
->private_data
;
304 struct drm_connector
*connector
= m
->private;
309 buf
= memdup_user(ubuf
, len
);
313 edid
= (struct edid
*) buf
;
315 if (len
== 5 && !strncmp(buf
, "reset", 5)) {
316 connector
->override_edid
= false;
317 ret
= drm_connector_update_edid_property(connector
, NULL
);
318 } else if (len
< EDID_LENGTH
||
319 EDID_LENGTH
* (1 + edid
->extensions
) > len
)
322 connector
->override_edid
= false;
323 ret
= drm_connector_update_edid_property(connector
, edid
);
325 connector
->override_edid
= true;
330 return (ret
) ? ret
: len
;
333 static const struct file_operations drm_edid_fops
= {
334 .owner
= THIS_MODULE
,
338 .release
= single_release
,
343 static const struct file_operations drm_connector_fops
= {
344 .owner
= THIS_MODULE
,
345 .open
= connector_open
,
348 .release
= single_release
,
349 .write
= connector_write
352 int drm_debugfs_connector_add(struct drm_connector
*connector
)
354 struct drm_minor
*minor
= connector
->dev
->primary
;
355 struct dentry
*root
, *ent
;
357 if (!minor
->debugfs_root
)
360 root
= debugfs_create_dir(connector
->name
, minor
->debugfs_root
);
364 connector
->debugfs_entry
= root
;
367 ent
= debugfs_create_file("force", S_IRUGO
| S_IWUSR
, root
, connector
,
368 &drm_connector_fops
);
373 ent
= debugfs_create_file("edid_override", S_IRUGO
| S_IWUSR
, root
,
374 connector
, &drm_edid_fops
);
381 debugfs_remove_recursive(connector
->debugfs_entry
);
382 connector
->debugfs_entry
= NULL
;
386 void drm_debugfs_connector_remove(struct drm_connector
*connector
)
388 if (!connector
->debugfs_entry
)
391 debugfs_remove_recursive(connector
->debugfs_entry
);
393 connector
->debugfs_entry
= NULL
;
396 int drm_debugfs_crtc_add(struct drm_crtc
*crtc
)
398 struct drm_minor
*minor
= crtc
->dev
->primary
;
402 name
= kasprintf(GFP_KERNEL
, "crtc-%d", crtc
->index
);
406 root
= debugfs_create_dir(name
, minor
->debugfs_root
);
411 crtc
->debugfs_entry
= root
;
413 if (drm_debugfs_crtc_crc_add(crtc
))
419 drm_debugfs_crtc_remove(crtc
);
423 void drm_debugfs_crtc_remove(struct drm_crtc
*crtc
)
425 debugfs_remove_recursive(crtc
->debugfs_entry
);
426 crtc
->debugfs_entry
= NULL
;
429 #endif /* CONFIG_DEBUG_FS */