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 | */ | |
c484f02d | 169 | static ssize_t status_store(struct device *device, |
f453ba04 | 170 | struct device_attribute *attr, |
c484f02d | 171 | const char *buf, size_t count) |
f453ba04 DA |
172 | { |
173 | struct drm_connector *connector = to_drm_connector(device); | |
c484f02d CW |
174 | struct drm_device *dev = connector->dev; |
175 | enum drm_connector_status old_status; | |
007c80a5 CW |
176 | int ret; |
177 | ||
c484f02d | 178 | ret = mutex_lock_interruptible(&dev->mode_config.mutex); |
007c80a5 CW |
179 | if (ret) |
180 | return ret; | |
f453ba04 | 181 | |
c484f02d CW |
182 | old_status = connector->status; |
183 | ||
184 | if (sysfs_streq(buf, "detect")) { | |
185 | connector->force = 0; | |
186 | connector->status = connector->funcs->detect(connector, true); | |
187 | } else if (sysfs_streq(buf, "on")) { | |
188 | connector->force = DRM_FORCE_ON; | |
189 | } else if (sysfs_streq(buf, "on-digital")) { | |
190 | connector->force = DRM_FORCE_ON_DIGITAL; | |
191 | } else if (sysfs_streq(buf, "off")) { | |
192 | connector->force = DRM_FORCE_OFF; | |
193 | } else | |
194 | ret = -EINVAL; | |
195 | ||
196 | if (ret == 0 && connector->force) { | |
197 | if (connector->force == DRM_FORCE_ON || | |
198 | connector->force == DRM_FORCE_ON_DIGITAL) | |
199 | connector->status = connector_status_connected; | |
200 | else | |
201 | connector->status = connector_status_disconnected; | |
202 | if (connector->funcs->force) | |
203 | connector->funcs->force(connector); | |
204 | } | |
205 | ||
206 | if (old_status != connector->status) { | |
207 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n", | |
208 | connector->base.id, | |
209 | connector->name, | |
210 | old_status, connector->status); | |
211 | ||
212 | dev->mode_config.delayed_event = true; | |
213 | if (dev->mode_config.poll_enabled) | |
214 | schedule_delayed_work(&dev->mode_config.output_poll_work, | |
215 | 0); | |
216 | } | |
217 | ||
218 | mutex_unlock(&dev->mode_config.mutex); | |
219 | ||
220 | return ret; | |
221 | } | |
222 | ||
223 | static ssize_t status_show(struct device *device, | |
224 | struct device_attribute *attr, | |
225 | char *buf) | |
226 | { | |
227 | struct drm_connector *connector = to_drm_connector(device); | |
007c80a5 | 228 | |
75185c92 | 229 | return snprintf(buf, PAGE_SIZE, "%s\n", |
c484f02d | 230 | drm_get_connector_status_name(connector->status)); |
f453ba04 DA |
231 | } |
232 | ||
233 | static ssize_t dpms_show(struct device *device, | |
234 | struct device_attribute *attr, | |
235 | char *buf) | |
236 | { | |
237 | struct drm_connector *connector = to_drm_connector(device); | |
238 | struct drm_device *dev = connector->dev; | |
239 | uint64_t dpms_status; | |
240 | int ret; | |
241 | ||
58495563 | 242 | ret = drm_object_property_get_value(&connector->base, |
f453ba04 DA |
243 | dev->mode_config.dpms_property, |
244 | &dpms_status); | |
245 | if (ret) | |
246 | return 0; | |
247 | ||
75185c92 | 248 | return snprintf(buf, PAGE_SIZE, "%s\n", |
f453ba04 DA |
249 | drm_get_dpms_name((int)dpms_status)); |
250 | } | |
251 | ||
252 | static ssize_t enabled_show(struct device *device, | |
253 | struct device_attribute *attr, | |
254 | char *buf) | |
255 | { | |
256 | struct drm_connector *connector = to_drm_connector(device); | |
257 | ||
75185c92 | 258 | return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" : |
f453ba04 DA |
259 | "disabled"); |
260 | } | |
261 | ||
2c3c8bea CW |
262 | static ssize_t edid_show(struct file *filp, struct kobject *kobj, |
263 | struct bin_attribute *attr, char *buf, loff_t off, | |
264 | size_t count) | |
f453ba04 DA |
265 | { |
266 | struct device *connector_dev = container_of(kobj, struct device, kobj); | |
267 | struct drm_connector *connector = to_drm_connector(connector_dev); | |
268 | unsigned char *edid; | |
269 | size_t size; | |
270 | ||
271 | if (!connector->edid_blob_ptr) | |
272 | return 0; | |
273 | ||
274 | edid = connector->edid_blob_ptr->data; | |
275 | size = connector->edid_blob_ptr->length; | |
276 | if (!edid) | |
277 | return 0; | |
278 | ||
279 | if (off >= size) | |
280 | return 0; | |
281 | ||
282 | if (off + count > size) | |
283 | count = size - off; | |
284 | memcpy(buf, edid + off, count); | |
285 | ||
286 | return count; | |
287 | } | |
288 | ||
289 | static ssize_t modes_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_display_mode *mode; | |
295 | int written = 0; | |
296 | ||
297 | list_for_each_entry(mode, &connector->modes, head) { | |
298 | written += snprintf(buf + written, PAGE_SIZE - written, "%s\n", | |
299 | mode->name); | |
300 | } | |
301 | ||
302 | return written; | |
303 | } | |
304 | ||
305 | static ssize_t subconnector_show(struct device *device, | |
306 | struct device_attribute *attr, | |
307 | char *buf) | |
308 | { | |
309 | struct drm_connector *connector = to_drm_connector(device); | |
310 | struct drm_device *dev = connector->dev; | |
311 | struct drm_property *prop = NULL; | |
312 | uint64_t subconnector; | |
313 | int is_tv = 0; | |
314 | int ret; | |
315 | ||
316 | switch (connector->connector_type) { | |
317 | case DRM_MODE_CONNECTOR_DVII: | |
318 | prop = dev->mode_config.dvi_i_subconnector_property; | |
319 | break; | |
320 | case DRM_MODE_CONNECTOR_Composite: | |
321 | case DRM_MODE_CONNECTOR_SVIDEO: | |
322 | case DRM_MODE_CONNECTOR_Component: | |
74bd3c26 | 323 | case DRM_MODE_CONNECTOR_TV: |
f453ba04 DA |
324 | prop = dev->mode_config.tv_subconnector_property; |
325 | is_tv = 1; | |
326 | break; | |
327 | default: | |
328 | DRM_ERROR("Wrong connector type for this property\n"); | |
329 | return 0; | |
330 | } | |
331 | ||
332 | if (!prop) { | |
333 | DRM_ERROR("Unable to find subconnector property\n"); | |
334 | return 0; | |
335 | } | |
336 | ||
58495563 | 337 | ret = drm_object_property_get_value(&connector->base, prop, &subconnector); |
f453ba04 DA |
338 | if (ret) |
339 | return 0; | |
340 | ||
341 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? | |
342 | drm_get_tv_subconnector_name((int)subconnector) : | |
343 | drm_get_dvi_i_subconnector_name((int)subconnector)); | |
344 | } | |
345 | ||
346 | static ssize_t select_subconnector_show(struct device *device, | |
347 | struct device_attribute *attr, | |
348 | char *buf) | |
349 | { | |
350 | struct drm_connector *connector = to_drm_connector(device); | |
351 | struct drm_device *dev = connector->dev; | |
352 | struct drm_property *prop = NULL; | |
353 | uint64_t subconnector; | |
354 | int is_tv = 0; | |
355 | int ret; | |
356 | ||
357 | switch (connector->connector_type) { | |
358 | case DRM_MODE_CONNECTOR_DVII: | |
359 | prop = dev->mode_config.dvi_i_select_subconnector_property; | |
360 | break; | |
361 | case DRM_MODE_CONNECTOR_Composite: | |
362 | case DRM_MODE_CONNECTOR_SVIDEO: | |
363 | case DRM_MODE_CONNECTOR_Component: | |
74bd3c26 | 364 | case DRM_MODE_CONNECTOR_TV: |
f453ba04 DA |
365 | prop = dev->mode_config.tv_select_subconnector_property; |
366 | is_tv = 1; | |
367 | break; | |
368 | default: | |
369 | DRM_ERROR("Wrong connector type for this property\n"); | |
370 | return 0; | |
371 | } | |
372 | ||
373 | if (!prop) { | |
374 | DRM_ERROR("Unable to find select subconnector property\n"); | |
375 | return 0; | |
376 | } | |
377 | ||
58495563 | 378 | ret = drm_object_property_get_value(&connector->base, prop, &subconnector); |
f453ba04 DA |
379 | if (ret) |
380 | return 0; | |
381 | ||
382 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? | |
383 | drm_get_tv_select_name((int)subconnector) : | |
384 | drm_get_dvi_i_select_name((int)subconnector)); | |
385 | } | |
386 | ||
c484f02d | 387 | static DEVICE_ATTR_RW(status); |
335f1a62 TI |
388 | static DEVICE_ATTR_RO(enabled); |
389 | static DEVICE_ATTR_RO(dpms); | |
390 | static DEVICE_ATTR_RO(modes); | |
391 | ||
392 | static struct attribute *connector_dev_attrs[] = { | |
393 | &dev_attr_status.attr, | |
394 | &dev_attr_enabled.attr, | |
395 | &dev_attr_dpms.attr, | |
396 | &dev_attr_modes.attr, | |
397 | NULL | |
f453ba04 DA |
398 | }; |
399 | ||
400 | /* These attributes are for both DVI-I connectors and all types of tv-out. */ | |
335f1a62 TI |
401 | static DEVICE_ATTR_RO(subconnector); |
402 | static DEVICE_ATTR_RO(select_subconnector); | |
403 | ||
404 | static struct attribute *connector_opt_dev_attrs[] = { | |
405 | &dev_attr_subconnector.attr, | |
406 | &dev_attr_select_subconnector.attr, | |
407 | NULL | |
f453ba04 DA |
408 | }; |
409 | ||
7d4d3a58 JN |
410 | /* Connector type related helpers */ |
411 | static int kobj_connector_type(struct kobject *kobj) | |
335f1a62 TI |
412 | { |
413 | struct device *dev = kobj_to_dev(kobj); | |
414 | struct drm_connector *connector = to_drm_connector(dev); | |
415 | ||
7d4d3a58 JN |
416 | return connector->connector_type; |
417 | } | |
418 | ||
419 | static umode_t connector_opt_dev_is_visible(struct kobject *kobj, | |
420 | struct attribute *attr, int idx) | |
421 | { | |
335f1a62 TI |
422 | /* |
423 | * In the long run it maybe a good idea to make one set of | |
424 | * optionals per connector type. | |
425 | */ | |
7d4d3a58 | 426 | switch (kobj_connector_type(kobj)) { |
335f1a62 TI |
427 | case DRM_MODE_CONNECTOR_DVII: |
428 | case DRM_MODE_CONNECTOR_Composite: | |
429 | case DRM_MODE_CONNECTOR_SVIDEO: | |
430 | case DRM_MODE_CONNECTOR_Component: | |
431 | case DRM_MODE_CONNECTOR_TV: | |
432 | return attr->mode; | |
433 | } | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
f453ba04 DA |
438 | static struct bin_attribute edid_attr = { |
439 | .attr.name = "edid", | |
e36ebaf4 | 440 | .attr.mode = 0444, |
7466f4cc | 441 | .size = 0, |
f453ba04 DA |
442 | .read = edid_show, |
443 | }; | |
444 | ||
335f1a62 TI |
445 | static struct bin_attribute *connector_bin_attrs[] = { |
446 | &edid_attr, | |
447 | NULL | |
448 | }; | |
449 | ||
450 | static const struct attribute_group connector_dev_group = { | |
451 | .attrs = connector_dev_attrs, | |
452 | .bin_attrs = connector_bin_attrs, | |
453 | }; | |
454 | ||
455 | static const struct attribute_group connector_opt_dev_group = { | |
456 | .attrs = connector_opt_dev_attrs, | |
457 | .is_visible = connector_opt_dev_is_visible, | |
458 | }; | |
459 | ||
460 | static const struct attribute_group *connector_dev_groups[] = { | |
461 | &connector_dev_group, | |
462 | &connector_opt_dev_group, | |
463 | NULL | |
464 | }; | |
465 | ||
f453ba04 | 466 | /** |
3b02ab88 | 467 | * drm_sysfs_connector_add - add a connector to sysfs |
f453ba04 DA |
468 | * @connector: connector to add |
469 | * | |
3b02ab88 | 470 | * Create a connector device in sysfs, along with its associated connector |
f453ba04 DA |
471 | * properties (so far, connection status, dpms, mode list & edid) and |
472 | * generate a hotplug event so userspace knows there's a new connector | |
473 | * available. | |
f453ba04 DA |
474 | */ |
475 | int drm_sysfs_connector_add(struct drm_connector *connector) | |
476 | { | |
477 | struct drm_device *dev = connector->dev; | |
f453ba04 | 478 | |
5bdebb18 DA |
479 | if (connector->kdev) |
480 | return 0; | |
f453ba04 | 481 | |
335f1a62 TI |
482 | connector->kdev = |
483 | device_create_with_groups(drm_class, dev->primary->kdev, 0, | |
484 | connector, connector_dev_groups, | |
485 | "card%d-%s", dev->primary->index, | |
486 | connector->name); | |
f453ba04 | 487 | DRM_DEBUG("adding \"%s\" to sysfs\n", |
25933820 | 488 | connector->name); |
f453ba04 | 489 | |
5bdebb18 DA |
490 | if (IS_ERR(connector->kdev)) { |
491 | DRM_ERROR("failed to register connector device: %ld\n", PTR_ERR(connector->kdev)); | |
335f1a62 | 492 | return PTR_ERR(connector->kdev); |
f453ba04 DA |
493 | } |
494 | ||
f453ba04 DA |
495 | /* Let userspace know we have a new connector */ |
496 | drm_sysfs_hotplug_event(dev); | |
497 | ||
498 | return 0; | |
f453ba04 | 499 | } |
f453ba04 DA |
500 | |
501 | /** | |
502 | * drm_sysfs_connector_remove - remove an connector device from sysfs | |
503 | * @connector: connector to remove | |
504 | * | |
505 | * Remove @connector and its associated attributes from sysfs. Note that | |
506 | * the device model core will take care of sending the "remove" uevent | |
507 | * at this time, so we don't need to do it. | |
508 | * | |
509 | * Note: | |
510 | * This routine should only be called if the connector was previously | |
511 | * successfully registered. If @connector hasn't been registered yet, | |
512 | * you'll likely see a panic somewhere deep in sysfs code when called. | |
513 | */ | |
514 | void drm_sysfs_connector_remove(struct drm_connector *connector) | |
515 | { | |
5bdebb18 | 516 | if (!connector->kdev) |
1828fe6c | 517 | return; |
f453ba04 | 518 | DRM_DEBUG("removing \"%s\" from sysfs\n", |
25933820 | 519 | connector->name); |
f453ba04 | 520 | |
5bdebb18 DA |
521 | device_unregister(connector->kdev); |
522 | connector->kdev = NULL; | |
f453ba04 | 523 | } |
f453ba04 DA |
524 | |
525 | /** | |
526 | * drm_sysfs_hotplug_event - generate a DRM uevent | |
527 | * @dev: DRM device | |
528 | * | |
529 | * Send a uevent for the DRM device specified by @dev. Currently we only | |
530 | * set HOTPLUG=1 in the uevent environment, but this could be expanded to | |
531 | * deal with other types of events. | |
532 | */ | |
533 | void drm_sysfs_hotplug_event(struct drm_device *dev) | |
534 | { | |
535 | char *event_string = "HOTPLUG=1"; | |
536 | char *envp[] = { event_string, NULL }; | |
537 | ||
538 | DRM_DEBUG("generating hotplug event\n"); | |
539 | ||
5bdebb18 | 540 | kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp); |
f453ba04 | 541 | } |
5ca58282 | 542 | EXPORT_SYMBOL(drm_sysfs_hotplug_event); |
f453ba04 | 543 | |
760c960b DH |
544 | static void drm_sysfs_release(struct device *dev) |
545 | { | |
546 | kfree(dev); | |
547 | } | |
548 | ||
1da177e4 | 549 | /** |
e1728075 DH |
550 | * drm_sysfs_minor_alloc() - Allocate sysfs device for given minor |
551 | * @minor: minor to allocate sysfs device for | |
1da177e4 | 552 | * |
e1728075 DH |
553 | * This allocates a new sysfs device for @minor and returns it. The device is |
554 | * not registered nor linked. The caller has to use device_add() and | |
555 | * device_del() to register and unregister it. | |
556 | * | |
557 | * Note that dev_get_drvdata() on the new device will return the minor. | |
558 | * However, the device does not hold a ref-count to the minor nor to the | |
559 | * underlying drm_device. This is unproblematic as long as you access the | |
560 | * private data only in sysfs callbacks. device_del() disables those | |
561 | * synchronously, so they cannot be called after you cleanup a minor. | |
1da177e4 | 562 | */ |
e1728075 | 563 | struct device *drm_sysfs_minor_alloc(struct drm_minor *minor) |
1da177e4 | 564 | { |
e1728075 DH |
565 | const char *minor_str; |
566 | struct device *kdev; | |
760c960b | 567 | int r; |
e8b962b6 | 568 | |
f453ba04 DA |
569 | if (minor->type == DRM_MINOR_CONTROL) |
570 | minor_str = "controlD%d"; | |
e1728075 DH |
571 | else if (minor->type == DRM_MINOR_RENDER) |
572 | minor_str = "renderD%d"; | |
573 | else | |
574 | minor_str = "card%d"; | |
575 | ||
576 | kdev = kzalloc(sizeof(*kdev), GFP_KERNEL); | |
577 | if (!kdev) | |
578 | return ERR_PTR(-ENOMEM); | |
579 | ||
580 | device_initialize(kdev); | |
581 | kdev->devt = MKDEV(DRM_MAJOR, minor->index); | |
582 | kdev->class = drm_class; | |
583 | kdev->type = &drm_sysfs_device_minor; | |
584 | kdev->parent = minor->dev->dev; | |
585 | kdev->release = drm_sysfs_release; | |
586 | dev_set_drvdata(kdev, minor); | |
587 | ||
588 | r = dev_set_name(kdev, minor_str, minor->index); | |
760c960b | 589 | if (r < 0) |
e1728075 | 590 | goto err_free; |
760c960b | 591 | |
e1728075 | 592 | return kdev; |
1da177e4 | 593 | |
e1728075 DH |
594 | err_free: |
595 | put_device(kdev); | |
596 | return ERR_PTR(r); | |
1da177e4 | 597 | } |
327c225b | 598 | |
327c225b TH |
599 | /** |
600 | * drm_class_device_register - Register a struct device in the drm class. | |
601 | * | |
602 | * @dev: pointer to struct device to register. | |
603 | * | |
604 | * @dev should have all relevant members pre-filled with the exception | |
605 | * of the class member. In particular, the device_type member must | |
606 | * be set. | |
607 | */ | |
608 | ||
609 | int drm_class_device_register(struct device *dev) | |
610 | { | |
49099c49 DA |
611 | if (!drm_class || IS_ERR(drm_class)) |
612 | return -ENOENT; | |
613 | ||
327c225b TH |
614 | dev->class = drm_class; |
615 | return device_register(dev); | |
616 | } | |
617 | EXPORT_SYMBOL_GPL(drm_class_device_register); | |
618 | ||
619 | void drm_class_device_unregister(struct device *dev) | |
620 | { | |
621 | return device_unregister(dev); | |
622 | } | |
623 | EXPORT_SYMBOL_GPL(drm_class_device_unregister); |