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Commit | Line | Data |
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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 | ||
fcc90213 DH |
33 | struct class *drm_class; |
34 | ||
e8b962b6 | 35 | /** |
cf4b91f2 | 36 | * __drm_class_suspend - internal DRM class suspend routine |
e8b962b6 JB |
37 | * @dev: Linux device to suspend |
38 | * @state: power state to enter | |
39 | * | |
40 | * Just figures out what the actual struct drm_device associated with | |
41 | * @dev is and calls its suspend hook, if present. | |
42 | */ | |
cf4b91f2 | 43 | static int __drm_class_suspend(struct device *dev, pm_message_t state) |
e8b962b6 | 44 | { |
08e4d534 TH |
45 | if (dev->type == &drm_sysfs_device_minor) { |
46 | struct drm_minor *drm_minor = to_drm_minor(dev); | |
47 | struct drm_device *drm_dev = drm_minor->dev; | |
48 | ||
49 | if (drm_minor->type == DRM_MINOR_LEGACY && | |
50 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && | |
51 | drm_dev->driver->suspend) | |
52 | return drm_dev->driver->suspend(drm_dev, state); | |
53 | } | |
e8b962b6 JB |
54 | return 0; |
55 | } | |
56 | ||
cf4b91f2 SK |
57 | /** |
58 | * drm_class_suspend - internal DRM class suspend hook. Simply calls | |
59 | * __drm_class_suspend() with the correct pm state. | |
60 | * @dev: Linux device to suspend | |
61 | */ | |
62 | static int drm_class_suspend(struct device *dev) | |
63 | { | |
64 | return __drm_class_suspend(dev, PMSG_SUSPEND); | |
65 | } | |
66 | ||
67 | /** | |
68 | * drm_class_freeze - internal DRM class freeze hook. Simply calls | |
69 | * __drm_class_suspend() with the correct pm state. | |
70 | * @dev: Linux device to freeze | |
71 | */ | |
72 | static int drm_class_freeze(struct device *dev) | |
73 | { | |
74 | return __drm_class_suspend(dev, PMSG_FREEZE); | |
75 | } | |
76 | ||
e8b962b6 | 77 | /** |
08e4d534 | 78 | * drm_class_resume - DRM class resume hook |
e8b962b6 JB |
79 | * @dev: Linux device to resume |
80 | * | |
81 | * Just figures out what the actual struct drm_device associated with | |
82 | * @dev is and calls its resume hook, if present. | |
83 | */ | |
08e4d534 | 84 | static int drm_class_resume(struct device *dev) |
e8b962b6 | 85 | { |
08e4d534 TH |
86 | if (dev->type == &drm_sysfs_device_minor) { |
87 | struct drm_minor *drm_minor = to_drm_minor(dev); | |
88 | struct drm_device *drm_dev = drm_minor->dev; | |
89 | ||
90 | if (drm_minor->type == DRM_MINOR_LEGACY && | |
91 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && | |
92 | drm_dev->driver->resume) | |
93 | return drm_dev->driver->resume(drm_dev); | |
94 | } | |
e8b962b6 JB |
95 | return 0; |
96 | } | |
97 | ||
cf4b91f2 SK |
98 | static const struct dev_pm_ops drm_class_dev_pm_ops = { |
99 | .suspend = drm_class_suspend, | |
100 | .resume = drm_class_resume, | |
101 | .freeze = drm_class_freeze, | |
102 | }; | |
103 | ||
2c9ede55 | 104 | static char *drm_devnode(struct device *dev, umode_t *mode) |
02200d06 KS |
105 | { |
106 | return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev)); | |
107 | } | |
108 | ||
0933e2d9 AK |
109 | static CLASS_ATTR_STRING(version, S_IRUGO, |
110 | CORE_NAME " " | |
111 | __stringify(CORE_MAJOR) "." | |
112 | __stringify(CORE_MINOR) "." | |
113 | __stringify(CORE_PATCHLEVEL) " " | |
114 | CORE_DATE); | |
1da177e4 LT |
115 | |
116 | /** | |
fcc90213 DH |
117 | * drm_sysfs_init - initialize sysfs helpers |
118 | * | |
119 | * This is used to create the DRM class, which is the implicit parent of any | |
120 | * other top-level DRM sysfs objects. | |
1da177e4 | 121 | * |
fcc90213 | 122 | * You must call drm_sysfs_destroy() to release the allocated resources. |
1da177e4 | 123 | * |
fcc90213 | 124 | * Return: 0 on success, negative error code on failure. |
1da177e4 | 125 | */ |
fcc90213 | 126 | int drm_sysfs_init(void) |
1da177e4 | 127 | { |
24f73c92 | 128 | int err; |
0650fd58 | 129 | |
fcc90213 DH |
130 | drm_class = class_create(THIS_MODULE, "drm"); |
131 | if (IS_ERR(drm_class)) | |
132 | return PTR_ERR(drm_class); | |
e8b962b6 | 133 | |
fcc90213 | 134 | drm_class->pm = &drm_class_dev_pm_ops; |
0650fd58 | 135 | |
fcc90213 DH |
136 | err = class_create_file(drm_class, &class_attr_version.attr); |
137 | if (err) { | |
138 | class_destroy(drm_class); | |
139 | drm_class = NULL; | |
140 | return err; | |
141 | } | |
24f73c92 | 142 | |
fcc90213 DH |
143 | drm_class->devnode = drm_devnode; |
144 | return 0; | |
1da177e4 LT |
145 | } |
146 | ||
147 | /** | |
e8b962b6 | 148 | * drm_sysfs_destroy - destroys DRM class |
1da177e4 | 149 | * |
e8b962b6 | 150 | * Destroy the DRM device class. |
1da177e4 | 151 | */ |
e8b962b6 | 152 | void drm_sysfs_destroy(void) |
1da177e4 | 153 | { |
26b91ae4 | 154 | if (IS_ERR_OR_NULL(drm_class)) |
1da177e4 | 155 | return; |
0933e2d9 | 156 | class_remove_file(drm_class, &class_attr_version.attr); |
e8b962b6 | 157 | class_destroy(drm_class); |
49099c49 | 158 | drm_class = NULL; |
1da177e4 LT |
159 | } |
160 | ||
f453ba04 DA |
161 | /* |
162 | * Connector properties | |
163 | */ | |
c484f02d | 164 | static ssize_t status_store(struct device *device, |
f453ba04 | 165 | struct device_attribute *attr, |
c484f02d | 166 | const char *buf, size_t count) |
f453ba04 DA |
167 | { |
168 | struct drm_connector *connector = to_drm_connector(device); | |
c484f02d CW |
169 | struct drm_device *dev = connector->dev; |
170 | enum drm_connector_status old_status; | |
007c80a5 CW |
171 | int ret; |
172 | ||
c484f02d | 173 | ret = mutex_lock_interruptible(&dev->mode_config.mutex); |
007c80a5 CW |
174 | if (ret) |
175 | return ret; | |
f453ba04 | 176 | |
c484f02d CW |
177 | old_status = connector->status; |
178 | ||
179 | if (sysfs_streq(buf, "detect")) { | |
180 | connector->force = 0; | |
181 | connector->status = connector->funcs->detect(connector, true); | |
182 | } else if (sysfs_streq(buf, "on")) { | |
183 | connector->force = DRM_FORCE_ON; | |
184 | } else if (sysfs_streq(buf, "on-digital")) { | |
185 | connector->force = DRM_FORCE_ON_DIGITAL; | |
186 | } else if (sysfs_streq(buf, "off")) { | |
187 | connector->force = DRM_FORCE_OFF; | |
188 | } else | |
189 | ret = -EINVAL; | |
190 | ||
191 | if (ret == 0 && connector->force) { | |
192 | if (connector->force == DRM_FORCE_ON || | |
193 | connector->force == DRM_FORCE_ON_DIGITAL) | |
194 | connector->status = connector_status_connected; | |
195 | else | |
196 | connector->status = connector_status_disconnected; | |
197 | if (connector->funcs->force) | |
198 | connector->funcs->force(connector); | |
199 | } | |
200 | ||
201 | if (old_status != connector->status) { | |
202 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n", | |
203 | connector->base.id, | |
204 | connector->name, | |
205 | old_status, connector->status); | |
206 | ||
207 | dev->mode_config.delayed_event = true; | |
208 | if (dev->mode_config.poll_enabled) | |
209 | schedule_delayed_work(&dev->mode_config.output_poll_work, | |
210 | 0); | |
211 | } | |
212 | ||
213 | mutex_unlock(&dev->mode_config.mutex); | |
214 | ||
38d8571d | 215 | return ret ? ret : count; |
c484f02d CW |
216 | } |
217 | ||
218 | static ssize_t status_show(struct device *device, | |
219 | struct device_attribute *attr, | |
220 | char *buf) | |
221 | { | |
222 | struct drm_connector *connector = to_drm_connector(device); | |
007c80a5 | 223 | |
75185c92 | 224 | return snprintf(buf, PAGE_SIZE, "%s\n", |
c484f02d | 225 | drm_get_connector_status_name(connector->status)); |
f453ba04 DA |
226 | } |
227 | ||
228 | static ssize_t dpms_show(struct device *device, | |
229 | struct device_attribute *attr, | |
230 | char *buf) | |
231 | { | |
232 | struct drm_connector *connector = to_drm_connector(device); | |
233 | struct drm_device *dev = connector->dev; | |
234 | uint64_t dpms_status; | |
235 | int ret; | |
236 | ||
58495563 | 237 | ret = drm_object_property_get_value(&connector->base, |
f453ba04 DA |
238 | dev->mode_config.dpms_property, |
239 | &dpms_status); | |
240 | if (ret) | |
241 | return 0; | |
242 | ||
75185c92 | 243 | return snprintf(buf, PAGE_SIZE, "%s\n", |
f453ba04 DA |
244 | drm_get_dpms_name((int)dpms_status)); |
245 | } | |
246 | ||
247 | static ssize_t enabled_show(struct device *device, | |
248 | struct device_attribute *attr, | |
249 | char *buf) | |
250 | { | |
251 | struct drm_connector *connector = to_drm_connector(device); | |
252 | ||
75185c92 | 253 | return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" : |
f453ba04 DA |
254 | "disabled"); |
255 | } | |
256 | ||
2c3c8bea CW |
257 | static ssize_t edid_show(struct file *filp, struct kobject *kobj, |
258 | struct bin_attribute *attr, char *buf, loff_t off, | |
259 | size_t count) | |
f453ba04 DA |
260 | { |
261 | struct device *connector_dev = container_of(kobj, struct device, kobj); | |
262 | struct drm_connector *connector = to_drm_connector(connector_dev); | |
263 | unsigned char *edid; | |
264 | size_t size; | |
265 | ||
266 | if (!connector->edid_blob_ptr) | |
267 | return 0; | |
268 | ||
269 | edid = connector->edid_blob_ptr->data; | |
270 | size = connector->edid_blob_ptr->length; | |
271 | if (!edid) | |
272 | return 0; | |
273 | ||
274 | if (off >= size) | |
275 | return 0; | |
276 | ||
277 | if (off + count > size) | |
278 | count = size - off; | |
279 | memcpy(buf, edid + off, count); | |
280 | ||
281 | return count; | |
282 | } | |
283 | ||
284 | static ssize_t modes_show(struct device *device, | |
285 | struct device_attribute *attr, | |
286 | char *buf) | |
287 | { | |
288 | struct drm_connector *connector = to_drm_connector(device); | |
289 | struct drm_display_mode *mode; | |
290 | int written = 0; | |
291 | ||
292 | list_for_each_entry(mode, &connector->modes, head) { | |
293 | written += snprintf(buf + written, PAGE_SIZE - written, "%s\n", | |
294 | mode->name); | |
295 | } | |
296 | ||
297 | return written; | |
298 | } | |
299 | ||
4bb4637b JN |
300 | static ssize_t tv_subconnector_show(struct device *device, |
301 | struct device_attribute *attr, | |
302 | char *buf) | |
f453ba04 DA |
303 | { |
304 | struct drm_connector *connector = to_drm_connector(device); | |
305 | struct drm_device *dev = connector->dev; | |
4bb4637b | 306 | struct drm_property *prop; |
f453ba04 | 307 | uint64_t subconnector; |
f453ba04 DA |
308 | int ret; |
309 | ||
4bb4637b | 310 | prop = dev->mode_config.tv_subconnector_property; |
f453ba04 DA |
311 | if (!prop) { |
312 | DRM_ERROR("Unable to find subconnector property\n"); | |
313 | return 0; | |
f453ba04 DA |
314 | } |
315 | ||
58495563 | 316 | ret = drm_object_property_get_value(&connector->base, prop, &subconnector); |
f453ba04 DA |
317 | if (ret) |
318 | return 0; | |
319 | ||
4bb4637b JN |
320 | return snprintf(buf, PAGE_SIZE, "%s", |
321 | drm_get_tv_subconnector_name((int)subconnector)); | |
f453ba04 DA |
322 | } |
323 | ||
4bb4637b JN |
324 | static ssize_t tv_select_subconnector_show(struct device *device, |
325 | struct device_attribute *attr, | |
326 | char *buf) | |
f453ba04 DA |
327 | { |
328 | struct drm_connector *connector = to_drm_connector(device); | |
329 | struct drm_device *dev = connector->dev; | |
4bb4637b | 330 | struct drm_property *prop; |
f453ba04 | 331 | uint64_t subconnector; |
f453ba04 DA |
332 | int ret; |
333 | ||
4bb4637b | 334 | prop = dev->mode_config.tv_select_subconnector_property; |
f453ba04 | 335 | if (!prop) { |
4bb4637b | 336 | DRM_ERROR("Unable to find select subconnector property\n"); |
f453ba04 DA |
337 | return 0; |
338 | } | |
339 | ||
58495563 | 340 | ret = drm_object_property_get_value(&connector->base, prop, &subconnector); |
f453ba04 DA |
341 | if (ret) |
342 | return 0; | |
343 | ||
4bb4637b JN |
344 | return snprintf(buf, PAGE_SIZE, "%s", |
345 | drm_get_tv_select_name((int)subconnector)); | |
f453ba04 DA |
346 | } |
347 | ||
4bb4637b JN |
348 | static ssize_t dvii_subconnector_show(struct device *device, |
349 | struct device_attribute *attr, | |
350 | char *buf) | |
f453ba04 DA |
351 | { |
352 | struct drm_connector *connector = to_drm_connector(device); | |
353 | struct drm_device *dev = connector->dev; | |
4bb4637b | 354 | struct drm_property *prop; |
f453ba04 | 355 | uint64_t subconnector; |
f453ba04 DA |
356 | int ret; |
357 | ||
4bb4637b JN |
358 | prop = dev->mode_config.dvi_i_subconnector_property; |
359 | if (!prop) { | |
360 | DRM_ERROR("Unable to find subconnector property\n"); | |
361 | return 0; | |
f453ba04 DA |
362 | } |
363 | ||
4bb4637b JN |
364 | ret = drm_object_property_get_value(&connector->base, prop, &subconnector); |
365 | if (ret) | |
366 | return 0; | |
367 | ||
368 | return snprintf(buf, PAGE_SIZE, "%s", | |
369 | drm_get_dvi_i_subconnector_name((int)subconnector)); | |
370 | } | |
371 | ||
372 | static ssize_t dvii_select_subconnector_show(struct device *device, | |
373 | struct device_attribute *attr, | |
374 | char *buf) | |
375 | { | |
376 | struct drm_connector *connector = to_drm_connector(device); | |
377 | struct drm_device *dev = connector->dev; | |
378 | struct drm_property *prop; | |
379 | uint64_t subconnector; | |
380 | int ret; | |
381 | ||
4bb4637b | 382 | prop = dev->mode_config.dvi_i_select_subconnector_property; |
f453ba04 DA |
383 | if (!prop) { |
384 | DRM_ERROR("Unable to find select subconnector property\n"); | |
385 | return 0; | |
386 | } | |
387 | ||
58495563 | 388 | ret = drm_object_property_get_value(&connector->base, prop, &subconnector); |
f453ba04 DA |
389 | if (ret) |
390 | return 0; | |
391 | ||
4bb4637b | 392 | return snprintf(buf, PAGE_SIZE, "%s", |
f453ba04 DA |
393 | drm_get_dvi_i_select_name((int)subconnector)); |
394 | } | |
395 | ||
c484f02d | 396 | static DEVICE_ATTR_RW(status); |
335f1a62 TI |
397 | static DEVICE_ATTR_RO(enabled); |
398 | static DEVICE_ATTR_RO(dpms); | |
399 | static DEVICE_ATTR_RO(modes); | |
400 | ||
401 | static struct attribute *connector_dev_attrs[] = { | |
402 | &dev_attr_status.attr, | |
403 | &dev_attr_enabled.attr, | |
404 | &dev_attr_dpms.attr, | |
405 | &dev_attr_modes.attr, | |
406 | NULL | |
f453ba04 DA |
407 | }; |
408 | ||
4bb4637b JN |
409 | static DEVICE_ATTR_RO(tv_subconnector); |
410 | static DEVICE_ATTR_RO(tv_select_subconnector); | |
335f1a62 | 411 | |
fe6fcdd6 | 412 | static struct attribute *connector_tv_dev_attrs[] = { |
4bb4637b JN |
413 | &dev_attr_tv_subconnector.attr, |
414 | &dev_attr_tv_select_subconnector.attr, | |
335f1a62 | 415 | NULL |
f453ba04 DA |
416 | }; |
417 | ||
4bb4637b JN |
418 | static DEVICE_ATTR_RO(dvii_subconnector); |
419 | static DEVICE_ATTR_RO(dvii_select_subconnector); | |
420 | ||
421 | static struct attribute *connector_dvii_dev_attrs[] = { | |
422 | &dev_attr_dvii_subconnector.attr, | |
423 | &dev_attr_dvii_select_subconnector.attr, | |
335f1a62 | 424 | NULL |
f453ba04 DA |
425 | }; |
426 | ||
7d4d3a58 JN |
427 | /* Connector type related helpers */ |
428 | static int kobj_connector_type(struct kobject *kobj) | |
335f1a62 TI |
429 | { |
430 | struct device *dev = kobj_to_dev(kobj); | |
431 | struct drm_connector *connector = to_drm_connector(dev); | |
432 | ||
7d4d3a58 JN |
433 | return connector->connector_type; |
434 | } | |
435 | ||
fe6fcdd6 JN |
436 | static umode_t connector_is_dvii(struct kobject *kobj, |
437 | struct attribute *attr, int idx) | |
438 | { | |
439 | return kobj_connector_type(kobj) == DRM_MODE_CONNECTOR_DVII ? | |
440 | attr->mode : 0; | |
441 | } | |
442 | ||
443 | static umode_t connector_is_tv(struct kobject *kobj, | |
444 | struct attribute *attr, int idx) | |
7d4d3a58 | 445 | { |
7d4d3a58 | 446 | switch (kobj_connector_type(kobj)) { |
335f1a62 TI |
447 | case DRM_MODE_CONNECTOR_Composite: |
448 | case DRM_MODE_CONNECTOR_SVIDEO: | |
449 | case DRM_MODE_CONNECTOR_Component: | |
450 | case DRM_MODE_CONNECTOR_TV: | |
451 | return attr->mode; | |
452 | } | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
f453ba04 DA |
457 | static struct bin_attribute edid_attr = { |
458 | .attr.name = "edid", | |
e36ebaf4 | 459 | .attr.mode = 0444, |
7466f4cc | 460 | .size = 0, |
f453ba04 DA |
461 | .read = edid_show, |
462 | }; | |
463 | ||
335f1a62 TI |
464 | static struct bin_attribute *connector_bin_attrs[] = { |
465 | &edid_attr, | |
466 | NULL | |
467 | }; | |
468 | ||
469 | static const struct attribute_group connector_dev_group = { | |
470 | .attrs = connector_dev_attrs, | |
471 | .bin_attrs = connector_bin_attrs, | |
472 | }; | |
473 | ||
fe6fcdd6 JN |
474 | static const struct attribute_group connector_tv_dev_group = { |
475 | .attrs = connector_tv_dev_attrs, | |
476 | .is_visible = connector_is_tv, | |
477 | }; | |
478 | ||
479 | static const struct attribute_group connector_dvii_dev_group = { | |
4bb4637b | 480 | .attrs = connector_dvii_dev_attrs, |
fe6fcdd6 | 481 | .is_visible = connector_is_dvii, |
335f1a62 TI |
482 | }; |
483 | ||
484 | static const struct attribute_group *connector_dev_groups[] = { | |
485 | &connector_dev_group, | |
fe6fcdd6 JN |
486 | &connector_tv_dev_group, |
487 | &connector_dvii_dev_group, | |
335f1a62 TI |
488 | NULL |
489 | }; | |
490 | ||
f453ba04 | 491 | /** |
3b02ab88 | 492 | * drm_sysfs_connector_add - add a connector to sysfs |
f453ba04 DA |
493 | * @connector: connector to add |
494 | * | |
3b02ab88 | 495 | * Create a connector device in sysfs, along with its associated connector |
f453ba04 DA |
496 | * properties (so far, connection status, dpms, mode list & edid) and |
497 | * generate a hotplug event so userspace knows there's a new connector | |
498 | * available. | |
f453ba04 DA |
499 | */ |
500 | int drm_sysfs_connector_add(struct drm_connector *connector) | |
501 | { | |
502 | struct drm_device *dev = connector->dev; | |
f453ba04 | 503 | |
5bdebb18 DA |
504 | if (connector->kdev) |
505 | return 0; | |
f453ba04 | 506 | |
335f1a62 TI |
507 | connector->kdev = |
508 | device_create_with_groups(drm_class, dev->primary->kdev, 0, | |
509 | connector, connector_dev_groups, | |
510 | "card%d-%s", dev->primary->index, | |
511 | connector->name); | |
f453ba04 | 512 | DRM_DEBUG("adding \"%s\" to sysfs\n", |
25933820 | 513 | connector->name); |
f453ba04 | 514 | |
5bdebb18 DA |
515 | if (IS_ERR(connector->kdev)) { |
516 | DRM_ERROR("failed to register connector device: %ld\n", PTR_ERR(connector->kdev)); | |
335f1a62 | 517 | return PTR_ERR(connector->kdev); |
f453ba04 DA |
518 | } |
519 | ||
f453ba04 DA |
520 | /* Let userspace know we have a new connector */ |
521 | drm_sysfs_hotplug_event(dev); | |
522 | ||
523 | return 0; | |
f453ba04 | 524 | } |
f453ba04 DA |
525 | |
526 | /** | |
527 | * drm_sysfs_connector_remove - remove an connector device from sysfs | |
528 | * @connector: connector to remove | |
529 | * | |
530 | * Remove @connector and its associated attributes from sysfs. Note that | |
531 | * the device model core will take care of sending the "remove" uevent | |
532 | * at this time, so we don't need to do it. | |
533 | * | |
534 | * Note: | |
535 | * This routine should only be called if the connector was previously | |
536 | * successfully registered. If @connector hasn't been registered yet, | |
537 | * you'll likely see a panic somewhere deep in sysfs code when called. | |
538 | */ | |
539 | void drm_sysfs_connector_remove(struct drm_connector *connector) | |
540 | { | |
5bdebb18 | 541 | if (!connector->kdev) |
1828fe6c | 542 | return; |
f453ba04 | 543 | DRM_DEBUG("removing \"%s\" from sysfs\n", |
25933820 | 544 | connector->name); |
f453ba04 | 545 | |
5bdebb18 DA |
546 | device_unregister(connector->kdev); |
547 | connector->kdev = NULL; | |
f453ba04 | 548 | } |
f453ba04 DA |
549 | |
550 | /** | |
551 | * drm_sysfs_hotplug_event - generate a DRM uevent | |
552 | * @dev: DRM device | |
553 | * | |
554 | * Send a uevent for the DRM device specified by @dev. Currently we only | |
555 | * set HOTPLUG=1 in the uevent environment, but this could be expanded to | |
556 | * deal with other types of events. | |
557 | */ | |
558 | void drm_sysfs_hotplug_event(struct drm_device *dev) | |
559 | { | |
560 | char *event_string = "HOTPLUG=1"; | |
561 | char *envp[] = { event_string, NULL }; | |
562 | ||
563 | DRM_DEBUG("generating hotplug event\n"); | |
564 | ||
5bdebb18 | 565 | kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp); |
f453ba04 | 566 | } |
5ca58282 | 567 | EXPORT_SYMBOL(drm_sysfs_hotplug_event); |
f453ba04 | 568 | |
760c960b DH |
569 | static void drm_sysfs_release(struct device *dev) |
570 | { | |
571 | kfree(dev); | |
572 | } | |
573 | ||
1da177e4 | 574 | /** |
e1728075 DH |
575 | * drm_sysfs_minor_alloc() - Allocate sysfs device for given minor |
576 | * @minor: minor to allocate sysfs device for | |
1da177e4 | 577 | * |
e1728075 DH |
578 | * This allocates a new sysfs device for @minor and returns it. The device is |
579 | * not registered nor linked. The caller has to use device_add() and | |
580 | * device_del() to register and unregister it. | |
581 | * | |
582 | * Note that dev_get_drvdata() on the new device will return the minor. | |
583 | * However, the device does not hold a ref-count to the minor nor to the | |
584 | * underlying drm_device. This is unproblematic as long as you access the | |
585 | * private data only in sysfs callbacks. device_del() disables those | |
586 | * synchronously, so they cannot be called after you cleanup a minor. | |
1da177e4 | 587 | */ |
e1728075 | 588 | struct device *drm_sysfs_minor_alloc(struct drm_minor *minor) |
1da177e4 | 589 | { |
e1728075 DH |
590 | const char *minor_str; |
591 | struct device *kdev; | |
760c960b | 592 | int r; |
e8b962b6 | 593 | |
f453ba04 DA |
594 | if (minor->type == DRM_MINOR_CONTROL) |
595 | minor_str = "controlD%d"; | |
e1728075 DH |
596 | else if (minor->type == DRM_MINOR_RENDER) |
597 | minor_str = "renderD%d"; | |
598 | else | |
599 | minor_str = "card%d"; | |
600 | ||
601 | kdev = kzalloc(sizeof(*kdev), GFP_KERNEL); | |
602 | if (!kdev) | |
603 | return ERR_PTR(-ENOMEM); | |
604 | ||
605 | device_initialize(kdev); | |
606 | kdev->devt = MKDEV(DRM_MAJOR, minor->index); | |
607 | kdev->class = drm_class; | |
608 | kdev->type = &drm_sysfs_device_minor; | |
609 | kdev->parent = minor->dev->dev; | |
610 | kdev->release = drm_sysfs_release; | |
611 | dev_set_drvdata(kdev, minor); | |
612 | ||
613 | r = dev_set_name(kdev, minor_str, minor->index); | |
760c960b | 614 | if (r < 0) |
e1728075 | 615 | goto err_free; |
760c960b | 616 | |
e1728075 | 617 | return kdev; |
1da177e4 | 618 | |
e1728075 DH |
619 | err_free: |
620 | put_device(kdev); | |
621 | return ERR_PTR(r); | |
1da177e4 | 622 | } |
327c225b | 623 | |
327c225b TH |
624 | /** |
625 | * drm_class_device_register - Register a struct device in the drm class. | |
626 | * | |
627 | * @dev: pointer to struct device to register. | |
628 | * | |
629 | * @dev should have all relevant members pre-filled with the exception | |
630 | * of the class member. In particular, the device_type member must | |
631 | * be set. | |
632 | */ | |
633 | ||
634 | int drm_class_device_register(struct device *dev) | |
635 | { | |
49099c49 DA |
636 | if (!drm_class || IS_ERR(drm_class)) |
637 | return -ENOENT; | |
638 | ||
327c225b TH |
639 | dev->class = drm_class; |
640 | return device_register(dev); | |
641 | } | |
642 | EXPORT_SYMBOL_GPL(drm_class_device_register); | |
643 | ||
644 | void drm_class_device_unregister(struct device *dev) | |
645 | { | |
646 | return device_unregister(dev); | |
647 | } | |
648 | EXPORT_SYMBOL_GPL(drm_class_device_unregister); |