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> | |
67d0ec4e | 24 | #include "drm_internal.h" |
1da177e4 | 25 | |
5bdebb18 DA |
26 | #define to_drm_minor(d) dev_get_drvdata(d) |
27 | #define to_drm_connector(d) dev_get_drvdata(d) | |
e8b962b6 | 28 | |
08e4d534 TH |
29 | static struct device_type drm_sysfs_device_minor = { |
30 | .name = "drm_minor" | |
31 | }; | |
32 | ||
e8b962b6 | 33 | /** |
cf4b91f2 | 34 | * __drm_class_suspend - internal DRM class suspend routine |
e8b962b6 JB |
35 | * @dev: Linux device to suspend |
36 | * @state: power state to enter | |
37 | * | |
38 | * Just figures out what the actual struct drm_device associated with | |
39 | * @dev is and calls its suspend hook, if present. | |
40 | */ | |
cf4b91f2 | 41 | static int __drm_class_suspend(struct device *dev, pm_message_t state) |
e8b962b6 | 42 | { |
08e4d534 TH |
43 | if (dev->type == &drm_sysfs_device_minor) { |
44 | struct drm_minor *drm_minor = to_drm_minor(dev); | |
45 | struct drm_device *drm_dev = drm_minor->dev; | |
46 | ||
47 | if (drm_minor->type == DRM_MINOR_LEGACY && | |
48 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && | |
49 | drm_dev->driver->suspend) | |
50 | return drm_dev->driver->suspend(drm_dev, state); | |
51 | } | |
e8b962b6 JB |
52 | return 0; |
53 | } | |
54 | ||
cf4b91f2 SK |
55 | /** |
56 | * drm_class_suspend - internal DRM class suspend hook. Simply calls | |
57 | * __drm_class_suspend() with the correct pm state. | |
58 | * @dev: Linux device to suspend | |
59 | */ | |
60 | static int drm_class_suspend(struct device *dev) | |
61 | { | |
62 | return __drm_class_suspend(dev, PMSG_SUSPEND); | |
63 | } | |
64 | ||
65 | /** | |
66 | * drm_class_freeze - internal DRM class freeze hook. Simply calls | |
67 | * __drm_class_suspend() with the correct pm state. | |
68 | * @dev: Linux device to freeze | |
69 | */ | |
70 | static int drm_class_freeze(struct device *dev) | |
71 | { | |
72 | return __drm_class_suspend(dev, PMSG_FREEZE); | |
73 | } | |
74 | ||
e8b962b6 | 75 | /** |
08e4d534 | 76 | * drm_class_resume - DRM class resume hook |
e8b962b6 JB |
77 | * @dev: Linux device to resume |
78 | * | |
79 | * Just figures out what the actual struct drm_device associated with | |
80 | * @dev is and calls its resume hook, if present. | |
81 | */ | |
08e4d534 | 82 | static int drm_class_resume(struct device *dev) |
e8b962b6 | 83 | { |
08e4d534 TH |
84 | if (dev->type == &drm_sysfs_device_minor) { |
85 | struct drm_minor *drm_minor = to_drm_minor(dev); | |
86 | struct drm_device *drm_dev = drm_minor->dev; | |
87 | ||
88 | if (drm_minor->type == DRM_MINOR_LEGACY && | |
89 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && | |
90 | drm_dev->driver->resume) | |
91 | return drm_dev->driver->resume(drm_dev); | |
92 | } | |
e8b962b6 JB |
93 | return 0; |
94 | } | |
95 | ||
cf4b91f2 SK |
96 | static const struct dev_pm_ops drm_class_dev_pm_ops = { |
97 | .suspend = drm_class_suspend, | |
98 | .resume = drm_class_resume, | |
99 | .freeze = drm_class_freeze, | |
100 | }; | |
101 | ||
2c9ede55 | 102 | static char *drm_devnode(struct device *dev, umode_t *mode) |
02200d06 KS |
103 | { |
104 | return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev)); | |
105 | } | |
106 | ||
0933e2d9 AK |
107 | static CLASS_ATTR_STRING(version, S_IRUGO, |
108 | CORE_NAME " " | |
109 | __stringify(CORE_MAJOR) "." | |
110 | __stringify(CORE_MINOR) "." | |
111 | __stringify(CORE_PATCHLEVEL) " " | |
112 | CORE_DATE); | |
1da177e4 LT |
113 | |
114 | /** | |
115 | * drm_sysfs_create - create a struct drm_sysfs_class structure | |
116 | * @owner: pointer to the module that is to "own" this struct drm_sysfs_class | |
117 | * @name: pointer to a string for the name of this class. | |
118 | * | |
e8b962b6 | 119 | * This is used to create DRM class pointer that can then be used |
1da177e4 LT |
120 | * in calls to drm_sysfs_device_add(). |
121 | * | |
122 | * Note, the pointer created here is to be destroyed when finished by making a | |
123 | * call to drm_sysfs_destroy(). | |
124 | */ | |
0650fd58 | 125 | struct class *drm_sysfs_create(struct module *owner, char *name) |
1da177e4 | 126 | { |
0650fd58 | 127 | struct class *class; |
24f73c92 | 128 | int err; |
0650fd58 GKH |
129 | |
130 | class = class_create(owner, name); | |
94f060bd AM |
131 | if (IS_ERR(class)) { |
132 | err = PTR_ERR(class); | |
24f73c92 JG |
133 | goto err_out; |
134 | } | |
135 | ||
cf4b91f2 | 136 | class->pm = &drm_class_dev_pm_ops; |
e8b962b6 | 137 | |
0933e2d9 | 138 | err = class_create_file(class, &class_attr_version.attr); |
24f73c92 JG |
139 | if (err) |
140 | goto err_out_class; | |
0650fd58 | 141 | |
e454cea2 | 142 | class->devnode = drm_devnode; |
02200d06 | 143 | |
0650fd58 | 144 | return class; |
24f73c92 JG |
145 | |
146 | err_out_class: | |
147 | class_destroy(class); | |
148 | err_out: | |
149 | return ERR_PTR(err); | |
1da177e4 LT |
150 | } |
151 | ||
152 | /** | |
e8b962b6 | 153 | * drm_sysfs_destroy - destroys DRM class |
1da177e4 | 154 | * |
e8b962b6 | 155 | * Destroy the DRM device class. |
1da177e4 | 156 | */ |
e8b962b6 | 157 | void drm_sysfs_destroy(void) |
1da177e4 | 158 | { |
e8b962b6 | 159 | if ((drm_class == NULL) || (IS_ERR(drm_class))) |
1da177e4 | 160 | return; |
0933e2d9 | 161 | class_remove_file(drm_class, &class_attr_version.attr); |
e8b962b6 | 162 | class_destroy(drm_class); |
49099c49 | 163 | drm_class = NULL; |
1da177e4 LT |
164 | } |
165 | ||
f453ba04 DA |
166 | /* |
167 | * Connector properties | |
168 | */ | |
169 | static ssize_t status_show(struct device *device, | |
170 | struct device_attribute *attr, | |
171 | char *buf) | |
172 | { | |
173 | struct drm_connector *connector = to_drm_connector(device); | |
174 | enum drm_connector_status status; | |
007c80a5 CW |
175 | int ret; |
176 | ||
177 | ret = mutex_lock_interruptible(&connector->dev->mode_config.mutex); | |
178 | if (ret) | |
179 | return ret; | |
f453ba04 | 180 | |
7b334fcb | 181 | status = connector->funcs->detect(connector, true); |
007c80a5 CW |
182 | mutex_unlock(&connector->dev->mode_config.mutex); |
183 | ||
75185c92 | 184 | return snprintf(buf, PAGE_SIZE, "%s\n", |
f453ba04 DA |
185 | drm_get_connector_status_name(status)); |
186 | } | |
187 | ||
188 | static ssize_t dpms_show(struct device *device, | |
189 | struct device_attribute *attr, | |
190 | char *buf) | |
191 | { | |
192 | struct drm_connector *connector = to_drm_connector(device); | |
193 | struct drm_device *dev = connector->dev; | |
194 | uint64_t dpms_status; | |
195 | int ret; | |
196 | ||
58495563 | 197 | ret = drm_object_property_get_value(&connector->base, |
f453ba04 DA |
198 | dev->mode_config.dpms_property, |
199 | &dpms_status); | |
200 | if (ret) | |
201 | return 0; | |
202 | ||
75185c92 | 203 | return snprintf(buf, PAGE_SIZE, "%s\n", |
f453ba04 DA |
204 | drm_get_dpms_name((int)dpms_status)); |
205 | } | |
206 | ||
207 | static ssize_t enabled_show(struct device *device, | |
208 | struct device_attribute *attr, | |
209 | char *buf) | |
210 | { | |
211 | struct drm_connector *connector = to_drm_connector(device); | |
212 | ||
75185c92 | 213 | return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" : |
f453ba04 DA |
214 | "disabled"); |
215 | } | |
216 | ||
2c3c8bea CW |
217 | static ssize_t edid_show(struct file *filp, struct kobject *kobj, |
218 | struct bin_attribute *attr, char *buf, loff_t off, | |
219 | size_t count) | |
f453ba04 DA |
220 | { |
221 | struct device *connector_dev = container_of(kobj, struct device, kobj); | |
222 | struct drm_connector *connector = to_drm_connector(connector_dev); | |
223 | unsigned char *edid; | |
224 | size_t size; | |
225 | ||
226 | if (!connector->edid_blob_ptr) | |
227 | return 0; | |
228 | ||
229 | edid = connector->edid_blob_ptr->data; | |
230 | size = connector->edid_blob_ptr->length; | |
231 | if (!edid) | |
232 | return 0; | |
233 | ||
234 | if (off >= size) | |
235 | return 0; | |
236 | ||
237 | if (off + count > size) | |
238 | count = size - off; | |
239 | memcpy(buf, edid + off, count); | |
240 | ||
241 | return count; | |
242 | } | |
243 | ||
244 | static ssize_t modes_show(struct device *device, | |
245 | struct device_attribute *attr, | |
246 | char *buf) | |
247 | { | |
248 | struct drm_connector *connector = to_drm_connector(device); | |
249 | struct drm_display_mode *mode; | |
250 | int written = 0; | |
251 | ||
252 | list_for_each_entry(mode, &connector->modes, head) { | |
253 | written += snprintf(buf + written, PAGE_SIZE - written, "%s\n", | |
254 | mode->name); | |
255 | } | |
256 | ||
257 | return written; | |
258 | } | |
259 | ||
260 | static ssize_t subconnector_show(struct device *device, | |
261 | struct device_attribute *attr, | |
262 | char *buf) | |
263 | { | |
264 | struct drm_connector *connector = to_drm_connector(device); | |
265 | struct drm_device *dev = connector->dev; | |
266 | struct drm_property *prop = NULL; | |
267 | uint64_t subconnector; | |
268 | int is_tv = 0; | |
269 | int ret; | |
270 | ||
271 | switch (connector->connector_type) { | |
272 | case DRM_MODE_CONNECTOR_DVII: | |
273 | prop = dev->mode_config.dvi_i_subconnector_property; | |
274 | break; | |
275 | case DRM_MODE_CONNECTOR_Composite: | |
276 | case DRM_MODE_CONNECTOR_SVIDEO: | |
277 | case DRM_MODE_CONNECTOR_Component: | |
74bd3c26 | 278 | case DRM_MODE_CONNECTOR_TV: |
f453ba04 DA |
279 | prop = dev->mode_config.tv_subconnector_property; |
280 | is_tv = 1; | |
281 | break; | |
282 | default: | |
283 | DRM_ERROR("Wrong connector type for this property\n"); | |
284 | return 0; | |
285 | } | |
286 | ||
287 | if (!prop) { | |
288 | DRM_ERROR("Unable to find subconnector property\n"); | |
289 | return 0; | |
290 | } | |
291 | ||
58495563 | 292 | ret = drm_object_property_get_value(&connector->base, prop, &subconnector); |
f453ba04 DA |
293 | if (ret) |
294 | return 0; | |
295 | ||
296 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? | |
297 | drm_get_tv_subconnector_name((int)subconnector) : | |
298 | drm_get_dvi_i_subconnector_name((int)subconnector)); | |
299 | } | |
300 | ||
301 | static ssize_t select_subconnector_show(struct device *device, | |
302 | struct device_attribute *attr, | |
303 | char *buf) | |
304 | { | |
305 | struct drm_connector *connector = to_drm_connector(device); | |
306 | struct drm_device *dev = connector->dev; | |
307 | struct drm_property *prop = NULL; | |
308 | uint64_t subconnector; | |
309 | int is_tv = 0; | |
310 | int ret; | |
311 | ||
312 | switch (connector->connector_type) { | |
313 | case DRM_MODE_CONNECTOR_DVII: | |
314 | prop = dev->mode_config.dvi_i_select_subconnector_property; | |
315 | break; | |
316 | case DRM_MODE_CONNECTOR_Composite: | |
317 | case DRM_MODE_CONNECTOR_SVIDEO: | |
318 | case DRM_MODE_CONNECTOR_Component: | |
74bd3c26 | 319 | case DRM_MODE_CONNECTOR_TV: |
f453ba04 DA |
320 | prop = dev->mode_config.tv_select_subconnector_property; |
321 | is_tv = 1; | |
322 | break; | |
323 | default: | |
324 | DRM_ERROR("Wrong connector type for this property\n"); | |
325 | return 0; | |
326 | } | |
327 | ||
328 | if (!prop) { | |
329 | DRM_ERROR("Unable to find select subconnector property\n"); | |
330 | return 0; | |
331 | } | |
332 | ||
58495563 | 333 | ret = drm_object_property_get_value(&connector->base, prop, &subconnector); |
f453ba04 DA |
334 | if (ret) |
335 | return 0; | |
336 | ||
337 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? | |
338 | drm_get_tv_select_name((int)subconnector) : | |
339 | drm_get_dvi_i_select_name((int)subconnector)); | |
340 | } | |
341 | ||
342 | static struct device_attribute connector_attrs[] = { | |
343 | __ATTR_RO(status), | |
344 | __ATTR_RO(enabled), | |
345 | __ATTR_RO(dpms), | |
346 | __ATTR_RO(modes), | |
347 | }; | |
348 | ||
349 | /* These attributes are for both DVI-I connectors and all types of tv-out. */ | |
350 | static struct device_attribute connector_attrs_opt1[] = { | |
351 | __ATTR_RO(subconnector), | |
352 | __ATTR_RO(select_subconnector), | |
353 | }; | |
354 | ||
355 | static struct bin_attribute edid_attr = { | |
356 | .attr.name = "edid", | |
e36ebaf4 | 357 | .attr.mode = 0444, |
7466f4cc | 358 | .size = 0, |
f453ba04 DA |
359 | .read = edid_show, |
360 | }; | |
361 | ||
362 | /** | |
3b02ab88 | 363 | * drm_sysfs_connector_add - add a connector to sysfs |
f453ba04 DA |
364 | * @connector: connector to add |
365 | * | |
3b02ab88 | 366 | * Create a connector device in sysfs, along with its associated connector |
f453ba04 DA |
367 | * properties (so far, connection status, dpms, mode list & edid) and |
368 | * generate a hotplug event so userspace knows there's a new connector | |
369 | * available. | |
f453ba04 DA |
370 | */ |
371 | int drm_sysfs_connector_add(struct drm_connector *connector) | |
372 | { | |
373 | struct drm_device *dev = connector->dev; | |
a1c4560d DC |
374 | int attr_cnt = 0; |
375 | int opt_cnt = 0; | |
376 | int i; | |
4a1b0714 | 377 | int ret; |
f453ba04 | 378 | |
5bdebb18 DA |
379 | if (connector->kdev) |
380 | return 0; | |
f453ba04 | 381 | |
5bdebb18 DA |
382 | connector->kdev = device_create(drm_class, dev->primary->kdev, |
383 | 0, connector, "card%d-%s", | |
25933820 | 384 | dev->primary->index, connector->name); |
f453ba04 | 385 | DRM_DEBUG("adding \"%s\" to sysfs\n", |
25933820 | 386 | connector->name); |
f453ba04 | 387 | |
5bdebb18 DA |
388 | if (IS_ERR(connector->kdev)) { |
389 | DRM_ERROR("failed to register connector device: %ld\n", PTR_ERR(connector->kdev)); | |
390 | ret = PTR_ERR(connector->kdev); | |
f453ba04 DA |
391 | goto out; |
392 | } | |
393 | ||
394 | /* Standard attributes */ | |
395 | ||
a1c4560d | 396 | for (attr_cnt = 0; attr_cnt < ARRAY_SIZE(connector_attrs); attr_cnt++) { |
5bdebb18 | 397 | ret = device_create_file(connector->kdev, &connector_attrs[attr_cnt]); |
f453ba04 DA |
398 | if (ret) |
399 | goto err_out_files; | |
400 | } | |
401 | ||
402 | /* Optional attributes */ | |
403 | /* | |
404 | * In the long run it maybe a good idea to make one set of | |
405 | * optionals per connector type. | |
406 | */ | |
407 | switch (connector->connector_type) { | |
408 | case DRM_MODE_CONNECTOR_DVII: | |
409 | case DRM_MODE_CONNECTOR_Composite: | |
410 | case DRM_MODE_CONNECTOR_SVIDEO: | |
411 | case DRM_MODE_CONNECTOR_Component: | |
74bd3c26 | 412 | case DRM_MODE_CONNECTOR_TV: |
a1c4560d | 413 | for (opt_cnt = 0; opt_cnt < ARRAY_SIZE(connector_attrs_opt1); opt_cnt++) { |
5bdebb18 | 414 | ret = device_create_file(connector->kdev, &connector_attrs_opt1[opt_cnt]); |
f453ba04 DA |
415 | if (ret) |
416 | goto err_out_files; | |
417 | } | |
418 | break; | |
419 | default: | |
420 | break; | |
421 | } | |
422 | ||
5bdebb18 | 423 | ret = sysfs_create_bin_file(&connector->kdev->kobj, &edid_attr); |
f453ba04 DA |
424 | if (ret) |
425 | goto err_out_files; | |
426 | ||
427 | /* Let userspace know we have a new connector */ | |
428 | drm_sysfs_hotplug_event(dev); | |
429 | ||
430 | return 0; | |
431 | ||
432 | err_out_files: | |
a1c4560d | 433 | for (i = 0; i < opt_cnt; i++) |
5bdebb18 | 434 | device_remove_file(connector->kdev, &connector_attrs_opt1[i]); |
a1c4560d | 435 | for (i = 0; i < attr_cnt; i++) |
5bdebb18 | 436 | device_remove_file(connector->kdev, &connector_attrs[i]); |
5bdebb18 | 437 | device_unregister(connector->kdev); |
f453ba04 DA |
438 | |
439 | out: | |
440 | return ret; | |
441 | } | |
f453ba04 DA |
442 | |
443 | /** | |
444 | * drm_sysfs_connector_remove - remove an connector device from sysfs | |
445 | * @connector: connector to remove | |
446 | * | |
447 | * Remove @connector and its associated attributes from sysfs. Note that | |
448 | * the device model core will take care of sending the "remove" uevent | |
449 | * at this time, so we don't need to do it. | |
450 | * | |
451 | * Note: | |
452 | * This routine should only be called if the connector was previously | |
453 | * successfully registered. If @connector hasn't been registered yet, | |
454 | * you'll likely see a panic somewhere deep in sysfs code when called. | |
455 | */ | |
456 | void drm_sysfs_connector_remove(struct drm_connector *connector) | |
457 | { | |
458 | int i; | |
459 | ||
5bdebb18 | 460 | if (!connector->kdev) |
1828fe6c | 461 | return; |
f453ba04 | 462 | DRM_DEBUG("removing \"%s\" from sysfs\n", |
25933820 | 463 | connector->name); |
f453ba04 DA |
464 | |
465 | for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) | |
5bdebb18 DA |
466 | device_remove_file(connector->kdev, &connector_attrs[i]); |
467 | sysfs_remove_bin_file(&connector->kdev->kobj, &edid_attr); | |
5bdebb18 DA |
468 | device_unregister(connector->kdev); |
469 | connector->kdev = NULL; | |
f453ba04 | 470 | } |
f453ba04 DA |
471 | |
472 | /** | |
473 | * drm_sysfs_hotplug_event - generate a DRM uevent | |
474 | * @dev: DRM device | |
475 | * | |
476 | * Send a uevent for the DRM device specified by @dev. Currently we only | |
477 | * set HOTPLUG=1 in the uevent environment, but this could be expanded to | |
478 | * deal with other types of events. | |
479 | */ | |
480 | void drm_sysfs_hotplug_event(struct drm_device *dev) | |
481 | { | |
482 | char *event_string = "HOTPLUG=1"; | |
483 | char *envp[] = { event_string, NULL }; | |
484 | ||
485 | DRM_DEBUG("generating hotplug event\n"); | |
486 | ||
5bdebb18 | 487 | kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp); |
f453ba04 | 488 | } |
5ca58282 | 489 | EXPORT_SYMBOL(drm_sysfs_hotplug_event); |
f453ba04 | 490 | |
760c960b DH |
491 | static void drm_sysfs_release(struct device *dev) |
492 | { | |
493 | kfree(dev); | |
494 | } | |
495 | ||
1da177e4 | 496 | /** |
e1728075 DH |
497 | * drm_sysfs_minor_alloc() - Allocate sysfs device for given minor |
498 | * @minor: minor to allocate sysfs device for | |
1da177e4 | 499 | * |
e1728075 DH |
500 | * This allocates a new sysfs device for @minor and returns it. The device is |
501 | * not registered nor linked. The caller has to use device_add() and | |
502 | * device_del() to register and unregister it. | |
503 | * | |
504 | * Note that dev_get_drvdata() on the new device will return the minor. | |
505 | * However, the device does not hold a ref-count to the minor nor to the | |
506 | * underlying drm_device. This is unproblematic as long as you access the | |
507 | * private data only in sysfs callbacks. device_del() disables those | |
508 | * synchronously, so they cannot be called after you cleanup a minor. | |
1da177e4 | 509 | */ |
e1728075 | 510 | struct device *drm_sysfs_minor_alloc(struct drm_minor *minor) |
1da177e4 | 511 | { |
e1728075 DH |
512 | const char *minor_str; |
513 | struct device *kdev; | |
760c960b | 514 | int r; |
e8b962b6 | 515 | |
f453ba04 DA |
516 | if (minor->type == DRM_MINOR_CONTROL) |
517 | minor_str = "controlD%d"; | |
e1728075 DH |
518 | else if (minor->type == DRM_MINOR_RENDER) |
519 | minor_str = "renderD%d"; | |
520 | else | |
521 | minor_str = "card%d"; | |
522 | ||
523 | kdev = kzalloc(sizeof(*kdev), GFP_KERNEL); | |
524 | if (!kdev) | |
525 | return ERR_PTR(-ENOMEM); | |
526 | ||
527 | device_initialize(kdev); | |
528 | kdev->devt = MKDEV(DRM_MAJOR, minor->index); | |
529 | kdev->class = drm_class; | |
530 | kdev->type = &drm_sysfs_device_minor; | |
531 | kdev->parent = minor->dev->dev; | |
532 | kdev->release = drm_sysfs_release; | |
533 | dev_set_drvdata(kdev, minor); | |
534 | ||
535 | r = dev_set_name(kdev, minor_str, minor->index); | |
760c960b | 536 | if (r < 0) |
e1728075 | 537 | goto err_free; |
760c960b | 538 | |
e1728075 | 539 | return kdev; |
1da177e4 | 540 | |
e1728075 DH |
541 | err_free: |
542 | put_device(kdev); | |
543 | return ERR_PTR(r); | |
1da177e4 | 544 | } |
327c225b | 545 | |
327c225b TH |
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); |