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Commit | Line | Data |
---|---|---|
0650fd58 | 1 | |
1da177e4 LT |
2 | /* |
3 | * drm_sysfs.c - Modifications to drm_sysfs_class.c to support | |
4 | * extra sysfs attribute from DRM. Normal drm_sysfs_class | |
5 | * does not allow adding attributes. | |
6 | * | |
7 | * Copyright (c) 2004 Jon Smirl <jonsmirl@gmail.com> | |
8 | * Copyright (c) 2003-2004 Greg Kroah-Hartman <greg@kroah.com> | |
9 | * Copyright (c) 2003-2004 IBM Corp. | |
10 | * | |
11 | * This file is released under the GPLv2 | |
12 | * | |
13 | */ | |
14 | ||
1da177e4 LT |
15 | #include <linux/device.h> |
16 | #include <linux/kdev_t.h> | |
5a0e3ad6 | 17 | #include <linux/gfp.h> |
1da177e4 | 18 | #include <linux/err.h> |
2d1a8a48 | 19 | #include <linux/export.h> |
1da177e4 | 20 | |
760285e7 DH |
21 | #include <drm/drm_sysfs.h> |
22 | #include <drm/drm_core.h> | |
23 | #include <drm/drmP.h> | |
1da177e4 | 24 | |
2c14f28b | 25 | #define to_drm_minor(d) container_of(d, struct drm_minor, kdev) |
f453ba04 | 26 | #define to_drm_connector(d) container_of(d, struct drm_connector, kdev) |
e8b962b6 | 27 | |
08e4d534 TH |
28 | static struct device_type drm_sysfs_device_minor = { |
29 | .name = "drm_minor" | |
30 | }; | |
31 | ||
e8b962b6 | 32 | /** |
08e4d534 | 33 | * drm_class_suspend - DRM class suspend hook |
e8b962b6 JB |
34 | * @dev: Linux device to suspend |
35 | * @state: power state to enter | |
36 | * | |
37 | * Just figures out what the actual struct drm_device associated with | |
38 | * @dev is and calls its suspend hook, if present. | |
39 | */ | |
08e4d534 | 40 | static int drm_class_suspend(struct device *dev, pm_message_t state) |
e8b962b6 | 41 | { |
08e4d534 TH |
42 | if (dev->type == &drm_sysfs_device_minor) { |
43 | struct drm_minor *drm_minor = to_drm_minor(dev); | |
44 | struct drm_device *drm_dev = drm_minor->dev; | |
45 | ||
46 | if (drm_minor->type == DRM_MINOR_LEGACY && | |
47 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && | |
48 | drm_dev->driver->suspend) | |
49 | return drm_dev->driver->suspend(drm_dev, state); | |
50 | } | |
e8b962b6 JB |
51 | return 0; |
52 | } | |
53 | ||
54 | /** | |
08e4d534 | 55 | * drm_class_resume - DRM class resume hook |
e8b962b6 JB |
56 | * @dev: Linux device to resume |
57 | * | |
58 | * Just figures out what the actual struct drm_device associated with | |
59 | * @dev is and calls its resume hook, if present. | |
60 | */ | |
08e4d534 | 61 | static int drm_class_resume(struct device *dev) |
e8b962b6 | 62 | { |
08e4d534 TH |
63 | if (dev->type == &drm_sysfs_device_minor) { |
64 | struct drm_minor *drm_minor = to_drm_minor(dev); | |
65 | struct drm_device *drm_dev = drm_minor->dev; | |
66 | ||
67 | if (drm_minor->type == DRM_MINOR_LEGACY && | |
68 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && | |
69 | drm_dev->driver->resume) | |
70 | return drm_dev->driver->resume(drm_dev); | |
71 | } | |
e8b962b6 JB |
72 | return 0; |
73 | } | |
74 | ||
2c9ede55 | 75 | static char *drm_devnode(struct device *dev, umode_t *mode) |
02200d06 KS |
76 | { |
77 | return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev)); | |
78 | } | |
79 | ||
0933e2d9 AK |
80 | static CLASS_ATTR_STRING(version, S_IRUGO, |
81 | CORE_NAME " " | |
82 | __stringify(CORE_MAJOR) "." | |
83 | __stringify(CORE_MINOR) "." | |
84 | __stringify(CORE_PATCHLEVEL) " " | |
85 | CORE_DATE); | |
1da177e4 LT |
86 | |
87 | /** | |
88 | * drm_sysfs_create - create a struct drm_sysfs_class structure | |
89 | * @owner: pointer to the module that is to "own" this struct drm_sysfs_class | |
90 | * @name: pointer to a string for the name of this class. | |
91 | * | |
e8b962b6 | 92 | * This is used to create DRM class pointer that can then be used |
1da177e4 LT |
93 | * in calls to drm_sysfs_device_add(). |
94 | * | |
95 | * Note, the pointer created here is to be destroyed when finished by making a | |
96 | * call to drm_sysfs_destroy(). | |
97 | */ | |
0650fd58 | 98 | struct class *drm_sysfs_create(struct module *owner, char *name) |
1da177e4 | 99 | { |
0650fd58 | 100 | struct class *class; |
24f73c92 | 101 | int err; |
0650fd58 GKH |
102 | |
103 | class = class_create(owner, name); | |
94f060bd AM |
104 | if (IS_ERR(class)) { |
105 | err = PTR_ERR(class); | |
24f73c92 JG |
106 | goto err_out; |
107 | } | |
108 | ||
08e4d534 TH |
109 | class->suspend = drm_class_suspend; |
110 | class->resume = drm_class_resume; | |
e8b962b6 | 111 | |
0933e2d9 | 112 | err = class_create_file(class, &class_attr_version.attr); |
24f73c92 JG |
113 | if (err) |
114 | goto err_out_class; | |
0650fd58 | 115 | |
e454cea2 | 116 | class->devnode = drm_devnode; |
02200d06 | 117 | |
0650fd58 | 118 | return class; |
24f73c92 JG |
119 | |
120 | err_out_class: | |
121 | class_destroy(class); | |
122 | err_out: | |
123 | return ERR_PTR(err); | |
1da177e4 LT |
124 | } |
125 | ||
126 | /** | |
e8b962b6 | 127 | * drm_sysfs_destroy - destroys DRM class |
1da177e4 | 128 | * |
e8b962b6 | 129 | * Destroy the DRM device class. |
1da177e4 | 130 | */ |
e8b962b6 | 131 | void drm_sysfs_destroy(void) |
1da177e4 | 132 | { |
e8b962b6 | 133 | if ((drm_class == NULL) || (IS_ERR(drm_class))) |
1da177e4 | 134 | return; |
0933e2d9 | 135 | class_remove_file(drm_class, &class_attr_version.attr); |
e8b962b6 | 136 | class_destroy(drm_class); |
49099c49 | 137 | drm_class = NULL; |
1da177e4 LT |
138 | } |
139 | ||
e8b962b6 JB |
140 | /** |
141 | * drm_sysfs_device_release - do nothing | |
142 | * @dev: Linux device | |
143 | * | |
144 | * Normally, this would free the DRM device associated with @dev, along | |
145 | * with cleaning up any other stuff. But we do that in the DRM core, so | |
146 | * this function can just return and hope that the core does its job. | |
147 | */ | |
148 | static void drm_sysfs_device_release(struct device *dev) | |
149 | { | |
77d26dc9 | 150 | memset(dev, 0, sizeof(struct device)); |
e8b962b6 JB |
151 | return; |
152 | } | |
153 | ||
f453ba04 DA |
154 | /* |
155 | * Connector properties | |
156 | */ | |
157 | static ssize_t status_show(struct device *device, | |
158 | struct device_attribute *attr, | |
159 | char *buf) | |
160 | { | |
161 | struct drm_connector *connector = to_drm_connector(device); | |
162 | enum drm_connector_status status; | |
007c80a5 CW |
163 | int ret; |
164 | ||
165 | ret = mutex_lock_interruptible(&connector->dev->mode_config.mutex); | |
166 | if (ret) | |
167 | return ret; | |
f453ba04 | 168 | |
7b334fcb | 169 | status = connector->funcs->detect(connector, true); |
007c80a5 CW |
170 | mutex_unlock(&connector->dev->mode_config.mutex); |
171 | ||
75185c92 | 172 | return snprintf(buf, PAGE_SIZE, "%s\n", |
f453ba04 DA |
173 | drm_get_connector_status_name(status)); |
174 | } | |
175 | ||
176 | static ssize_t dpms_show(struct device *device, | |
177 | struct device_attribute *attr, | |
178 | char *buf) | |
179 | { | |
180 | struct drm_connector *connector = to_drm_connector(device); | |
181 | struct drm_device *dev = connector->dev; | |
182 | uint64_t dpms_status; | |
183 | int ret; | |
184 | ||
58495563 | 185 | ret = drm_object_property_get_value(&connector->base, |
f453ba04 DA |
186 | dev->mode_config.dpms_property, |
187 | &dpms_status); | |
188 | if (ret) | |
189 | return 0; | |
190 | ||
75185c92 | 191 | return snprintf(buf, PAGE_SIZE, "%s\n", |
f453ba04 DA |
192 | drm_get_dpms_name((int)dpms_status)); |
193 | } | |
194 | ||
195 | static ssize_t enabled_show(struct device *device, | |
196 | struct device_attribute *attr, | |
197 | char *buf) | |
198 | { | |
199 | struct drm_connector *connector = to_drm_connector(device); | |
200 | ||
75185c92 | 201 | return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" : |
f453ba04 DA |
202 | "disabled"); |
203 | } | |
204 | ||
2c3c8bea CW |
205 | static ssize_t edid_show(struct file *filp, struct kobject *kobj, |
206 | struct bin_attribute *attr, char *buf, loff_t off, | |
207 | size_t count) | |
f453ba04 DA |
208 | { |
209 | struct device *connector_dev = container_of(kobj, struct device, kobj); | |
210 | struct drm_connector *connector = to_drm_connector(connector_dev); | |
211 | unsigned char *edid; | |
212 | size_t size; | |
213 | ||
214 | if (!connector->edid_blob_ptr) | |
215 | return 0; | |
216 | ||
217 | edid = connector->edid_blob_ptr->data; | |
218 | size = connector->edid_blob_ptr->length; | |
219 | if (!edid) | |
220 | return 0; | |
221 | ||
222 | if (off >= size) | |
223 | return 0; | |
224 | ||
225 | if (off + count > size) | |
226 | count = size - off; | |
227 | memcpy(buf, edid + off, count); | |
228 | ||
229 | return count; | |
230 | } | |
231 | ||
232 | static ssize_t modes_show(struct device *device, | |
233 | struct device_attribute *attr, | |
234 | char *buf) | |
235 | { | |
236 | struct drm_connector *connector = to_drm_connector(device); | |
237 | struct drm_display_mode *mode; | |
238 | int written = 0; | |
239 | ||
240 | list_for_each_entry(mode, &connector->modes, head) { | |
241 | written += snprintf(buf + written, PAGE_SIZE - written, "%s\n", | |
242 | mode->name); | |
243 | } | |
244 | ||
245 | return written; | |
246 | } | |
247 | ||
248 | static ssize_t subconnector_show(struct device *device, | |
249 | struct device_attribute *attr, | |
250 | char *buf) | |
251 | { | |
252 | struct drm_connector *connector = to_drm_connector(device); | |
253 | struct drm_device *dev = connector->dev; | |
254 | struct drm_property *prop = NULL; | |
255 | uint64_t subconnector; | |
256 | int is_tv = 0; | |
257 | int ret; | |
258 | ||
259 | switch (connector->connector_type) { | |
260 | case DRM_MODE_CONNECTOR_DVII: | |
261 | prop = dev->mode_config.dvi_i_subconnector_property; | |
262 | break; | |
263 | case DRM_MODE_CONNECTOR_Composite: | |
264 | case DRM_MODE_CONNECTOR_SVIDEO: | |
265 | case DRM_MODE_CONNECTOR_Component: | |
74bd3c26 | 266 | case DRM_MODE_CONNECTOR_TV: |
f453ba04 DA |
267 | prop = dev->mode_config.tv_subconnector_property; |
268 | is_tv = 1; | |
269 | break; | |
270 | default: | |
271 | DRM_ERROR("Wrong connector type for this property\n"); | |
272 | return 0; | |
273 | } | |
274 | ||
275 | if (!prop) { | |
276 | DRM_ERROR("Unable to find subconnector property\n"); | |
277 | return 0; | |
278 | } | |
279 | ||
58495563 | 280 | ret = drm_object_property_get_value(&connector->base, prop, &subconnector); |
f453ba04 DA |
281 | if (ret) |
282 | return 0; | |
283 | ||
284 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? | |
285 | drm_get_tv_subconnector_name((int)subconnector) : | |
286 | drm_get_dvi_i_subconnector_name((int)subconnector)); | |
287 | } | |
288 | ||
289 | static ssize_t select_subconnector_show(struct device *device, | |
290 | struct device_attribute *attr, | |
291 | char *buf) | |
292 | { | |
293 | struct drm_connector *connector = to_drm_connector(device); | |
294 | struct drm_device *dev = connector->dev; | |
295 | struct drm_property *prop = NULL; | |
296 | uint64_t subconnector; | |
297 | int is_tv = 0; | |
298 | int ret; | |
299 | ||
300 | switch (connector->connector_type) { | |
301 | case DRM_MODE_CONNECTOR_DVII: | |
302 | prop = dev->mode_config.dvi_i_select_subconnector_property; | |
303 | break; | |
304 | case DRM_MODE_CONNECTOR_Composite: | |
305 | case DRM_MODE_CONNECTOR_SVIDEO: | |
306 | case DRM_MODE_CONNECTOR_Component: | |
74bd3c26 | 307 | case DRM_MODE_CONNECTOR_TV: |
f453ba04 DA |
308 | prop = dev->mode_config.tv_select_subconnector_property; |
309 | is_tv = 1; | |
310 | break; | |
311 | default: | |
312 | DRM_ERROR("Wrong connector type for this property\n"); | |
313 | return 0; | |
314 | } | |
315 | ||
316 | if (!prop) { | |
317 | DRM_ERROR("Unable to find select subconnector property\n"); | |
318 | return 0; | |
319 | } | |
320 | ||
58495563 | 321 | ret = drm_object_property_get_value(&connector->base, prop, &subconnector); |
f453ba04 DA |
322 | if (ret) |
323 | return 0; | |
324 | ||
325 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? | |
326 | drm_get_tv_select_name((int)subconnector) : | |
327 | drm_get_dvi_i_select_name((int)subconnector)); | |
328 | } | |
329 | ||
330 | static struct device_attribute connector_attrs[] = { | |
331 | __ATTR_RO(status), | |
332 | __ATTR_RO(enabled), | |
333 | __ATTR_RO(dpms), | |
334 | __ATTR_RO(modes), | |
335 | }; | |
336 | ||
337 | /* These attributes are for both DVI-I connectors and all types of tv-out. */ | |
338 | static struct device_attribute connector_attrs_opt1[] = { | |
339 | __ATTR_RO(subconnector), | |
340 | __ATTR_RO(select_subconnector), | |
341 | }; | |
342 | ||
343 | static struct bin_attribute edid_attr = { | |
344 | .attr.name = "edid", | |
e36ebaf4 | 345 | .attr.mode = 0444, |
7466f4cc | 346 | .size = 0, |
f453ba04 DA |
347 | .read = edid_show, |
348 | }; | |
349 | ||
350 | /** | |
3b02ab88 | 351 | * drm_sysfs_connector_add - add a connector to sysfs |
f453ba04 DA |
352 | * @connector: connector to add |
353 | * | |
3b02ab88 | 354 | * Create a connector device in sysfs, along with its associated connector |
f453ba04 DA |
355 | * properties (so far, connection status, dpms, mode list & edid) and |
356 | * generate a hotplug event so userspace knows there's a new connector | |
357 | * available. | |
358 | * | |
359 | * Note: | |
3b02ab88 LP |
360 | * This routine should only be called *once* for each registered connector. |
361 | * A second call for an already registered connector will trigger the BUG_ON | |
f453ba04 DA |
362 | * below. |
363 | */ | |
364 | int drm_sysfs_connector_add(struct drm_connector *connector) | |
365 | { | |
366 | struct drm_device *dev = connector->dev; | |
a1c4560d DC |
367 | int attr_cnt = 0; |
368 | int opt_cnt = 0; | |
369 | int i; | |
4a1b0714 | 370 | int ret; |
f453ba04 DA |
371 | |
372 | /* We shouldn't get called more than once for the same connector */ | |
373 | BUG_ON(device_is_registered(&connector->kdev)); | |
374 | ||
375 | connector->kdev.parent = &dev->primary->kdev; | |
376 | connector->kdev.class = drm_class; | |
377 | connector->kdev.release = drm_sysfs_device_release; | |
378 | ||
379 | DRM_DEBUG("adding \"%s\" to sysfs\n", | |
380 | drm_get_connector_name(connector)); | |
381 | ||
2ead054c KS |
382 | dev_set_name(&connector->kdev, "card%d-%s", |
383 | dev->primary->index, drm_get_connector_name(connector)); | |
f453ba04 DA |
384 | ret = device_register(&connector->kdev); |
385 | ||
386 | if (ret) { | |
387 | DRM_ERROR("failed to register connector device: %d\n", ret); | |
388 | goto out; | |
389 | } | |
390 | ||
391 | /* Standard attributes */ | |
392 | ||
a1c4560d DC |
393 | for (attr_cnt = 0; attr_cnt < ARRAY_SIZE(connector_attrs); attr_cnt++) { |
394 | ret = device_create_file(&connector->kdev, &connector_attrs[attr_cnt]); | |
f453ba04 DA |
395 | if (ret) |
396 | goto err_out_files; | |
397 | } | |
398 | ||
399 | /* Optional attributes */ | |
400 | /* | |
401 | * In the long run it maybe a good idea to make one set of | |
402 | * optionals per connector type. | |
403 | */ | |
404 | switch (connector->connector_type) { | |
405 | case DRM_MODE_CONNECTOR_DVII: | |
406 | case DRM_MODE_CONNECTOR_Composite: | |
407 | case DRM_MODE_CONNECTOR_SVIDEO: | |
408 | case DRM_MODE_CONNECTOR_Component: | |
74bd3c26 | 409 | case DRM_MODE_CONNECTOR_TV: |
a1c4560d DC |
410 | for (opt_cnt = 0; opt_cnt < ARRAY_SIZE(connector_attrs_opt1); opt_cnt++) { |
411 | ret = device_create_file(&connector->kdev, &connector_attrs_opt1[opt_cnt]); | |
f453ba04 DA |
412 | if (ret) |
413 | goto err_out_files; | |
414 | } | |
415 | break; | |
416 | default: | |
417 | break; | |
418 | } | |
419 | ||
420 | ret = sysfs_create_bin_file(&connector->kdev.kobj, &edid_attr); | |
421 | if (ret) | |
422 | goto err_out_files; | |
423 | ||
424 | /* Let userspace know we have a new connector */ | |
425 | drm_sysfs_hotplug_event(dev); | |
426 | ||
427 | return 0; | |
428 | ||
429 | err_out_files: | |
a1c4560d DC |
430 | for (i = 0; i < opt_cnt; i++) |
431 | device_remove_file(&connector->kdev, &connector_attrs_opt1[i]); | |
432 | for (i = 0; i < attr_cnt; i++) | |
433 | device_remove_file(&connector->kdev, &connector_attrs[i]); | |
f453ba04 DA |
434 | device_unregister(&connector->kdev); |
435 | ||
436 | out: | |
437 | return ret; | |
438 | } | |
439 | EXPORT_SYMBOL(drm_sysfs_connector_add); | |
440 | ||
441 | /** | |
442 | * drm_sysfs_connector_remove - remove an connector device from sysfs | |
443 | * @connector: connector to remove | |
444 | * | |
445 | * Remove @connector and its associated attributes from sysfs. Note that | |
446 | * the device model core will take care of sending the "remove" uevent | |
447 | * at this time, so we don't need to do it. | |
448 | * | |
449 | * Note: | |
450 | * This routine should only be called if the connector was previously | |
451 | * successfully registered. If @connector hasn't been registered yet, | |
452 | * you'll likely see a panic somewhere deep in sysfs code when called. | |
453 | */ | |
454 | void drm_sysfs_connector_remove(struct drm_connector *connector) | |
455 | { | |
456 | int i; | |
457 | ||
1828fe6c DA |
458 | if (!connector->kdev.parent) |
459 | return; | |
f453ba04 DA |
460 | DRM_DEBUG("removing \"%s\" from sysfs\n", |
461 | drm_get_connector_name(connector)); | |
462 | ||
463 | for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) | |
464 | device_remove_file(&connector->kdev, &connector_attrs[i]); | |
465 | sysfs_remove_bin_file(&connector->kdev.kobj, &edid_attr); | |
466 | device_unregister(&connector->kdev); | |
1828fe6c | 467 | connector->kdev.parent = NULL; |
f453ba04 DA |
468 | } |
469 | EXPORT_SYMBOL(drm_sysfs_connector_remove); | |
470 | ||
471 | /** | |
472 | * drm_sysfs_hotplug_event - generate a DRM uevent | |
473 | * @dev: DRM device | |
474 | * | |
475 | * Send a uevent for the DRM device specified by @dev. Currently we only | |
476 | * set HOTPLUG=1 in the uevent environment, but this could be expanded to | |
477 | * deal with other types of events. | |
478 | */ | |
479 | void drm_sysfs_hotplug_event(struct drm_device *dev) | |
480 | { | |
481 | char *event_string = "HOTPLUG=1"; | |
482 | char *envp[] = { event_string, NULL }; | |
483 | ||
484 | DRM_DEBUG("generating hotplug event\n"); | |
485 | ||
486 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, envp); | |
487 | } | |
5ca58282 | 488 | EXPORT_SYMBOL(drm_sysfs_hotplug_event); |
f453ba04 | 489 | |
1da177e4 LT |
490 | /** |
491 | * drm_sysfs_device_add - adds a class device to sysfs for a character driver | |
e8b962b6 JB |
492 | * @dev: DRM device to be added |
493 | * @head: DRM head in question | |
1da177e4 | 494 | * |
e8b962b6 JB |
495 | * Add a DRM device to the DRM's device model class. We use @dev's PCI device |
496 | * as the parent for the Linux device, and make sure it has a file containing | |
497 | * the driver we're using (for userspace compatibility). | |
1da177e4 | 498 | */ |
2c14f28b | 499 | int drm_sysfs_device_add(struct drm_minor *minor) |
1da177e4 | 500 | { |
e8b962b6 | 501 | int err; |
2c14f28b | 502 | char *minor_str; |
e8b962b6 | 503 | |
dcdb1674 JC |
504 | minor->kdev.parent = minor->dev->dev; |
505 | ||
2c14f28b DA |
506 | minor->kdev.class = drm_class; |
507 | minor->kdev.release = drm_sysfs_device_release; | |
508 | minor->kdev.devt = minor->device; | |
08e4d534 | 509 | minor->kdev.type = &drm_sysfs_device_minor; |
f453ba04 DA |
510 | if (minor->type == DRM_MINOR_CONTROL) |
511 | minor_str = "controlD%d"; | |
512 | else if (minor->type == DRM_MINOR_RENDER) | |
513 | minor_str = "renderD%d"; | |
514 | else | |
515 | minor_str = "card%d"; | |
e8b962b6 | 516 | |
8f4bbd9f | 517 | dev_set_name(&minor->kdev, minor_str, minor->index); |
2c14f28b DA |
518 | |
519 | err = device_register(&minor->kdev); | |
e8b962b6 JB |
520 | if (err) { |
521 | DRM_ERROR("device add failed: %d\n", err); | |
24f73c92 JG |
522 | goto err_out; |
523 | } | |
1da177e4 | 524 | |
e8b962b6 | 525 | return 0; |
24f73c92 | 526 | |
24f73c92 | 527 | err_out: |
e8b962b6 | 528 | return err; |
1da177e4 LT |
529 | } |
530 | ||
531 | /** | |
e8b962b6 JB |
532 | * drm_sysfs_device_remove - remove DRM device |
533 | * @dev: DRM device to remove | |
1da177e4 LT |
534 | * |
535 | * This call unregisters and cleans up a class device that was created with a | |
536 | * call to drm_sysfs_device_add() | |
537 | */ | |
2c14f28b | 538 | void drm_sysfs_device_remove(struct drm_minor *minor) |
1da177e4 | 539 | { |
1828fe6c DA |
540 | if (minor->kdev.parent) |
541 | device_unregister(&minor->kdev); | |
542 | minor->kdev.parent = NULL; | |
1da177e4 | 543 | } |
327c225b TH |
544 | |
545 | ||
546 | /** | |
547 | * drm_class_device_register - Register a struct device in the drm class. | |
548 | * | |
549 | * @dev: pointer to struct device to register. | |
550 | * | |
551 | * @dev should have all relevant members pre-filled with the exception | |
552 | * of the class member. In particular, the device_type member must | |
553 | * be set. | |
554 | */ | |
555 | ||
556 | int drm_class_device_register(struct device *dev) | |
557 | { | |
49099c49 DA |
558 | if (!drm_class || IS_ERR(drm_class)) |
559 | return -ENOENT; | |
560 | ||
327c225b TH |
561 | dev->class = drm_class; |
562 | return device_register(dev); | |
563 | } | |
564 | EXPORT_SYMBOL_GPL(drm_class_device_register); | |
565 | ||
566 | void drm_class_device_unregister(struct device *dev) | |
567 | { | |
568 | return device_unregister(dev); | |
569 | } | |
570 | EXPORT_SYMBOL_GPL(drm_class_device_unregister); |