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> | |
17 | #include <linux/err.h> | |
18 | ||
327c225b | 19 | #include "drm_sysfs.h" |
1da177e4 | 20 | #include "drm_core.h" |
f210973b | 21 | #include "drmP.h" |
1da177e4 | 22 | |
2c14f28b | 23 | #define to_drm_minor(d) container_of(d, struct drm_minor, kdev) |
f453ba04 | 24 | #define to_drm_connector(d) container_of(d, struct drm_connector, kdev) |
e8b962b6 JB |
25 | |
26 | /** | |
27 | * drm_sysfs_suspend - DRM class suspend hook | |
28 | * @dev: Linux device to suspend | |
29 | * @state: power state to enter | |
30 | * | |
31 | * Just figures out what the actual struct drm_device associated with | |
32 | * @dev is and calls its suspend hook, if present. | |
33 | */ | |
34 | static int drm_sysfs_suspend(struct device *dev, pm_message_t state) | |
35 | { | |
2c14f28b DA |
36 | struct drm_minor *drm_minor = to_drm_minor(dev); |
37 | struct drm_device *drm_dev = drm_minor->dev; | |
e8b962b6 | 38 | |
112b715e KH |
39 | if (drm_minor->type == DRM_MINOR_LEGACY && |
40 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && | |
41 | drm_dev->driver->suspend) | |
b932ccb5 | 42 | return drm_dev->driver->suspend(drm_dev, state); |
e8b962b6 JB |
43 | |
44 | return 0; | |
45 | } | |
46 | ||
47 | /** | |
48 | * drm_sysfs_resume - DRM class resume hook | |
49 | * @dev: Linux device to resume | |
50 | * | |
51 | * Just figures out what the actual struct drm_device associated with | |
52 | * @dev is and calls its resume hook, if present. | |
53 | */ | |
54 | static int drm_sysfs_resume(struct device *dev) | |
55 | { | |
2c14f28b DA |
56 | struct drm_minor *drm_minor = to_drm_minor(dev); |
57 | struct drm_device *drm_dev = drm_minor->dev; | |
e8b962b6 | 58 | |
112b715e KH |
59 | if (drm_minor->type == DRM_MINOR_LEGACY && |
60 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && | |
61 | drm_dev->driver->resume) | |
e8b962b6 JB |
62 | return drm_dev->driver->resume(drm_dev); |
63 | ||
64 | return 0; | |
65 | } | |
66 | ||
1da177e4 LT |
67 | /* Display the version of drm_core. This doesn't work right in current design */ |
68 | static ssize_t version_show(struct class *dev, char *buf) | |
69 | { | |
70 | return sprintf(buf, "%s %d.%d.%d %s\n", CORE_NAME, CORE_MAJOR, | |
71 | CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); | |
72 | } | |
73 | ||
02200d06 KS |
74 | static char *drm_nodename(struct device *dev) |
75 | { | |
76 | return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev)); | |
77 | } | |
78 | ||
1da177e4 LT |
79 | static CLASS_ATTR(version, S_IRUGO, version_show, NULL); |
80 | ||
81 | /** | |
82 | * drm_sysfs_create - create a struct drm_sysfs_class structure | |
83 | * @owner: pointer to the module that is to "own" this struct drm_sysfs_class | |
84 | * @name: pointer to a string for the name of this class. | |
85 | * | |
e8b962b6 | 86 | * This is used to create DRM class pointer that can then be used |
1da177e4 LT |
87 | * in calls to drm_sysfs_device_add(). |
88 | * | |
89 | * Note, the pointer created here is to be destroyed when finished by making a | |
90 | * call to drm_sysfs_destroy(). | |
91 | */ | |
0650fd58 | 92 | struct class *drm_sysfs_create(struct module *owner, char *name) |
1da177e4 | 93 | { |
0650fd58 | 94 | struct class *class; |
24f73c92 | 95 | int err; |
0650fd58 GKH |
96 | |
97 | class = class_create(owner, name); | |
94f060bd AM |
98 | if (IS_ERR(class)) { |
99 | err = PTR_ERR(class); | |
24f73c92 JG |
100 | goto err_out; |
101 | } | |
102 | ||
e8b962b6 JB |
103 | class->suspend = drm_sysfs_suspend; |
104 | class->resume = drm_sysfs_resume; | |
105 | ||
24f73c92 JG |
106 | err = class_create_file(class, &class_attr_version); |
107 | if (err) | |
108 | goto err_out_class; | |
0650fd58 | 109 | |
02200d06 KS |
110 | class->nodename = drm_nodename; |
111 | ||
0650fd58 | 112 | return class; |
24f73c92 JG |
113 | |
114 | err_out_class: | |
115 | class_destroy(class); | |
116 | err_out: | |
117 | return ERR_PTR(err); | |
1da177e4 LT |
118 | } |
119 | ||
120 | /** | |
e8b962b6 | 121 | * drm_sysfs_destroy - destroys DRM class |
1da177e4 | 122 | * |
e8b962b6 | 123 | * Destroy the DRM device class. |
1da177e4 | 124 | */ |
e8b962b6 | 125 | void drm_sysfs_destroy(void) |
1da177e4 | 126 | { |
e8b962b6 | 127 | if ((drm_class == NULL) || (IS_ERR(drm_class))) |
1da177e4 | 128 | return; |
e8b962b6 JB |
129 | class_remove_file(drm_class, &class_attr_version); |
130 | class_destroy(drm_class); | |
1da177e4 LT |
131 | } |
132 | ||
e8b962b6 JB |
133 | /** |
134 | * drm_sysfs_device_release - do nothing | |
135 | * @dev: Linux device | |
136 | * | |
137 | * Normally, this would free the DRM device associated with @dev, along | |
138 | * with cleaning up any other stuff. But we do that in the DRM core, so | |
139 | * this function can just return and hope that the core does its job. | |
140 | */ | |
141 | static void drm_sysfs_device_release(struct device *dev) | |
142 | { | |
77d26dc9 | 143 | memset(dev, 0, sizeof(struct device)); |
e8b962b6 JB |
144 | return; |
145 | } | |
146 | ||
f453ba04 DA |
147 | /* |
148 | * Connector properties | |
149 | */ | |
150 | static ssize_t status_show(struct device *device, | |
151 | struct device_attribute *attr, | |
152 | char *buf) | |
153 | { | |
154 | struct drm_connector *connector = to_drm_connector(device); | |
155 | enum drm_connector_status status; | |
156 | ||
157 | status = connector->funcs->detect(connector); | |
75185c92 | 158 | return snprintf(buf, PAGE_SIZE, "%s\n", |
f453ba04 DA |
159 | drm_get_connector_status_name(status)); |
160 | } | |
161 | ||
162 | static ssize_t dpms_show(struct device *device, | |
163 | struct device_attribute *attr, | |
164 | char *buf) | |
165 | { | |
166 | struct drm_connector *connector = to_drm_connector(device); | |
167 | struct drm_device *dev = connector->dev; | |
168 | uint64_t dpms_status; | |
169 | int ret; | |
170 | ||
171 | ret = drm_connector_property_get_value(connector, | |
172 | dev->mode_config.dpms_property, | |
173 | &dpms_status); | |
174 | if (ret) | |
175 | return 0; | |
176 | ||
75185c92 | 177 | return snprintf(buf, PAGE_SIZE, "%s\n", |
f453ba04 DA |
178 | drm_get_dpms_name((int)dpms_status)); |
179 | } | |
180 | ||
181 | static ssize_t enabled_show(struct device *device, | |
182 | struct device_attribute *attr, | |
183 | char *buf) | |
184 | { | |
185 | struct drm_connector *connector = to_drm_connector(device); | |
186 | ||
75185c92 | 187 | return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" : |
f453ba04 DA |
188 | "disabled"); |
189 | } | |
190 | ||
191 | static ssize_t edid_show(struct kobject *kobj, struct bin_attribute *attr, | |
192 | char *buf, loff_t off, size_t count) | |
193 | { | |
194 | struct device *connector_dev = container_of(kobj, struct device, kobj); | |
195 | struct drm_connector *connector = to_drm_connector(connector_dev); | |
196 | unsigned char *edid; | |
197 | size_t size; | |
198 | ||
199 | if (!connector->edid_blob_ptr) | |
200 | return 0; | |
201 | ||
202 | edid = connector->edid_blob_ptr->data; | |
203 | size = connector->edid_blob_ptr->length; | |
204 | if (!edid) | |
205 | return 0; | |
206 | ||
207 | if (off >= size) | |
208 | return 0; | |
209 | ||
210 | if (off + count > size) | |
211 | count = size - off; | |
212 | memcpy(buf, edid + off, count); | |
213 | ||
214 | return count; | |
215 | } | |
216 | ||
217 | static ssize_t modes_show(struct device *device, | |
218 | struct device_attribute *attr, | |
219 | char *buf) | |
220 | { | |
221 | struct drm_connector *connector = to_drm_connector(device); | |
222 | struct drm_display_mode *mode; | |
223 | int written = 0; | |
224 | ||
225 | list_for_each_entry(mode, &connector->modes, head) { | |
226 | written += snprintf(buf + written, PAGE_SIZE - written, "%s\n", | |
227 | mode->name); | |
228 | } | |
229 | ||
230 | return written; | |
231 | } | |
232 | ||
233 | static ssize_t subconnector_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 | struct drm_property *prop = NULL; | |
240 | uint64_t subconnector; | |
241 | int is_tv = 0; | |
242 | int ret; | |
243 | ||
244 | switch (connector->connector_type) { | |
245 | case DRM_MODE_CONNECTOR_DVII: | |
246 | prop = dev->mode_config.dvi_i_subconnector_property; | |
247 | break; | |
248 | case DRM_MODE_CONNECTOR_Composite: | |
249 | case DRM_MODE_CONNECTOR_SVIDEO: | |
250 | case DRM_MODE_CONNECTOR_Component: | |
74bd3c26 | 251 | case DRM_MODE_CONNECTOR_TV: |
f453ba04 DA |
252 | prop = dev->mode_config.tv_subconnector_property; |
253 | is_tv = 1; | |
254 | break; | |
255 | default: | |
256 | DRM_ERROR("Wrong connector type for this property\n"); | |
257 | return 0; | |
258 | } | |
259 | ||
260 | if (!prop) { | |
261 | DRM_ERROR("Unable to find subconnector property\n"); | |
262 | return 0; | |
263 | } | |
264 | ||
265 | ret = drm_connector_property_get_value(connector, prop, &subconnector); | |
266 | if (ret) | |
267 | return 0; | |
268 | ||
269 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? | |
270 | drm_get_tv_subconnector_name((int)subconnector) : | |
271 | drm_get_dvi_i_subconnector_name((int)subconnector)); | |
272 | } | |
273 | ||
274 | static ssize_t select_subconnector_show(struct device *device, | |
275 | struct device_attribute *attr, | |
276 | char *buf) | |
277 | { | |
278 | struct drm_connector *connector = to_drm_connector(device); | |
279 | struct drm_device *dev = connector->dev; | |
280 | struct drm_property *prop = NULL; | |
281 | uint64_t subconnector; | |
282 | int is_tv = 0; | |
283 | int ret; | |
284 | ||
285 | switch (connector->connector_type) { | |
286 | case DRM_MODE_CONNECTOR_DVII: | |
287 | prop = dev->mode_config.dvi_i_select_subconnector_property; | |
288 | break; | |
289 | case DRM_MODE_CONNECTOR_Composite: | |
290 | case DRM_MODE_CONNECTOR_SVIDEO: | |
291 | case DRM_MODE_CONNECTOR_Component: | |
74bd3c26 | 292 | case DRM_MODE_CONNECTOR_TV: |
f453ba04 DA |
293 | prop = dev->mode_config.tv_select_subconnector_property; |
294 | is_tv = 1; | |
295 | break; | |
296 | default: | |
297 | DRM_ERROR("Wrong connector type for this property\n"); | |
298 | return 0; | |
299 | } | |
300 | ||
301 | if (!prop) { | |
302 | DRM_ERROR("Unable to find select subconnector property\n"); | |
303 | return 0; | |
304 | } | |
305 | ||
306 | ret = drm_connector_property_get_value(connector, prop, &subconnector); | |
307 | if (ret) | |
308 | return 0; | |
309 | ||
310 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? | |
311 | drm_get_tv_select_name((int)subconnector) : | |
312 | drm_get_dvi_i_select_name((int)subconnector)); | |
313 | } | |
314 | ||
315 | static struct device_attribute connector_attrs[] = { | |
316 | __ATTR_RO(status), | |
317 | __ATTR_RO(enabled), | |
318 | __ATTR_RO(dpms), | |
319 | __ATTR_RO(modes), | |
320 | }; | |
321 | ||
322 | /* These attributes are for both DVI-I connectors and all types of tv-out. */ | |
323 | static struct device_attribute connector_attrs_opt1[] = { | |
324 | __ATTR_RO(subconnector), | |
325 | __ATTR_RO(select_subconnector), | |
326 | }; | |
327 | ||
328 | static struct bin_attribute edid_attr = { | |
329 | .attr.name = "edid", | |
e36ebaf4 | 330 | .attr.mode = 0444, |
f453ba04 DA |
331 | .size = 128, |
332 | .read = edid_show, | |
333 | }; | |
334 | ||
335 | /** | |
336 | * drm_sysfs_connector_add - add an connector to sysfs | |
337 | * @connector: connector to add | |
338 | * | |
339 | * Create an connector device in sysfs, along with its associated connector | |
340 | * properties (so far, connection status, dpms, mode list & edid) and | |
341 | * generate a hotplug event so userspace knows there's a new connector | |
342 | * available. | |
343 | * | |
344 | * Note: | |
345 | * This routine should only be called *once* for each DRM minor registered. | |
346 | * A second call for an already registered device will trigger the BUG_ON | |
347 | * below. | |
348 | */ | |
349 | int drm_sysfs_connector_add(struct drm_connector *connector) | |
350 | { | |
351 | struct drm_device *dev = connector->dev; | |
352 | int ret = 0, i, j; | |
353 | ||
354 | /* We shouldn't get called more than once for the same connector */ | |
355 | BUG_ON(device_is_registered(&connector->kdev)); | |
356 | ||
357 | connector->kdev.parent = &dev->primary->kdev; | |
358 | connector->kdev.class = drm_class; | |
359 | connector->kdev.release = drm_sysfs_device_release; | |
360 | ||
361 | DRM_DEBUG("adding \"%s\" to sysfs\n", | |
362 | drm_get_connector_name(connector)); | |
363 | ||
2ead054c KS |
364 | dev_set_name(&connector->kdev, "card%d-%s", |
365 | dev->primary->index, drm_get_connector_name(connector)); | |
f453ba04 DA |
366 | ret = device_register(&connector->kdev); |
367 | ||
368 | if (ret) { | |
369 | DRM_ERROR("failed to register connector device: %d\n", ret); | |
370 | goto out; | |
371 | } | |
372 | ||
373 | /* Standard attributes */ | |
374 | ||
375 | for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) { | |
376 | ret = device_create_file(&connector->kdev, &connector_attrs[i]); | |
377 | if (ret) | |
378 | goto err_out_files; | |
379 | } | |
380 | ||
381 | /* Optional attributes */ | |
382 | /* | |
383 | * In the long run it maybe a good idea to make one set of | |
384 | * optionals per connector type. | |
385 | */ | |
386 | switch (connector->connector_type) { | |
387 | case DRM_MODE_CONNECTOR_DVII: | |
388 | case DRM_MODE_CONNECTOR_Composite: | |
389 | case DRM_MODE_CONNECTOR_SVIDEO: | |
390 | case DRM_MODE_CONNECTOR_Component: | |
74bd3c26 | 391 | case DRM_MODE_CONNECTOR_TV: |
f453ba04 DA |
392 | for (i = 0; i < ARRAY_SIZE(connector_attrs_opt1); i++) { |
393 | ret = device_create_file(&connector->kdev, &connector_attrs_opt1[i]); | |
394 | if (ret) | |
395 | goto err_out_files; | |
396 | } | |
397 | break; | |
398 | default: | |
399 | break; | |
400 | } | |
401 | ||
402 | ret = sysfs_create_bin_file(&connector->kdev.kobj, &edid_attr); | |
403 | if (ret) | |
404 | goto err_out_files; | |
405 | ||
406 | /* Let userspace know we have a new connector */ | |
407 | drm_sysfs_hotplug_event(dev); | |
408 | ||
409 | return 0; | |
410 | ||
411 | err_out_files: | |
412 | if (i > 0) | |
413 | for (j = 0; j < i; j++) | |
414 | device_remove_file(&connector->kdev, | |
415 | &connector_attrs[i]); | |
416 | device_unregister(&connector->kdev); | |
417 | ||
418 | out: | |
419 | return ret; | |
420 | } | |
421 | EXPORT_SYMBOL(drm_sysfs_connector_add); | |
422 | ||
423 | /** | |
424 | * drm_sysfs_connector_remove - remove an connector device from sysfs | |
425 | * @connector: connector to remove | |
426 | * | |
427 | * Remove @connector and its associated attributes from sysfs. Note that | |
428 | * the device model core will take care of sending the "remove" uevent | |
429 | * at this time, so we don't need to do it. | |
430 | * | |
431 | * Note: | |
432 | * This routine should only be called if the connector was previously | |
433 | * successfully registered. If @connector hasn't been registered yet, | |
434 | * you'll likely see a panic somewhere deep in sysfs code when called. | |
435 | */ | |
436 | void drm_sysfs_connector_remove(struct drm_connector *connector) | |
437 | { | |
438 | int i; | |
439 | ||
440 | DRM_DEBUG("removing \"%s\" from sysfs\n", | |
441 | drm_get_connector_name(connector)); | |
442 | ||
443 | for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) | |
444 | device_remove_file(&connector->kdev, &connector_attrs[i]); | |
445 | sysfs_remove_bin_file(&connector->kdev.kobj, &edid_attr); | |
446 | device_unregister(&connector->kdev); | |
447 | } | |
448 | EXPORT_SYMBOL(drm_sysfs_connector_remove); | |
449 | ||
450 | /** | |
451 | * drm_sysfs_hotplug_event - generate a DRM uevent | |
452 | * @dev: DRM device | |
453 | * | |
454 | * Send a uevent for the DRM device specified by @dev. Currently we only | |
455 | * set HOTPLUG=1 in the uevent environment, but this could be expanded to | |
456 | * deal with other types of events. | |
457 | */ | |
458 | void drm_sysfs_hotplug_event(struct drm_device *dev) | |
459 | { | |
460 | char *event_string = "HOTPLUG=1"; | |
461 | char *envp[] = { event_string, NULL }; | |
462 | ||
463 | DRM_DEBUG("generating hotplug event\n"); | |
464 | ||
465 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, envp); | |
466 | } | |
5ca58282 | 467 | EXPORT_SYMBOL(drm_sysfs_hotplug_event); |
f453ba04 | 468 | |
1da177e4 LT |
469 | /** |
470 | * drm_sysfs_device_add - adds a class device to sysfs for a character driver | |
e8b962b6 JB |
471 | * @dev: DRM device to be added |
472 | * @head: DRM head in question | |
1da177e4 | 473 | * |
e8b962b6 JB |
474 | * Add a DRM device to the DRM's device model class. We use @dev's PCI device |
475 | * as the parent for the Linux device, and make sure it has a file containing | |
476 | * the driver we're using (for userspace compatibility). | |
1da177e4 | 477 | */ |
2c14f28b | 478 | int drm_sysfs_device_add(struct drm_minor *minor) |
1da177e4 | 479 | { |
e8b962b6 | 480 | int err; |
2c14f28b | 481 | char *minor_str; |
e8b962b6 | 482 | |
2c14f28b DA |
483 | minor->kdev.parent = &minor->dev->pdev->dev; |
484 | minor->kdev.class = drm_class; | |
485 | minor->kdev.release = drm_sysfs_device_release; | |
486 | minor->kdev.devt = minor->device; | |
f453ba04 DA |
487 | if (minor->type == DRM_MINOR_CONTROL) |
488 | minor_str = "controlD%d"; | |
489 | else if (minor->type == DRM_MINOR_RENDER) | |
490 | minor_str = "renderD%d"; | |
491 | else | |
492 | minor_str = "card%d"; | |
e8b962b6 | 493 | |
8f4bbd9f | 494 | dev_set_name(&minor->kdev, minor_str, minor->index); |
2c14f28b DA |
495 | |
496 | err = device_register(&minor->kdev); | |
e8b962b6 JB |
497 | if (err) { |
498 | DRM_ERROR("device add failed: %d\n", err); | |
24f73c92 JG |
499 | goto err_out; |
500 | } | |
1da177e4 | 501 | |
e8b962b6 | 502 | return 0; |
24f73c92 | 503 | |
24f73c92 | 504 | err_out: |
e8b962b6 | 505 | return err; |
1da177e4 LT |
506 | } |
507 | ||
508 | /** | |
e8b962b6 JB |
509 | * drm_sysfs_device_remove - remove DRM device |
510 | * @dev: DRM device to remove | |
1da177e4 LT |
511 | * |
512 | * This call unregisters and cleans up a class device that was created with a | |
513 | * call to drm_sysfs_device_add() | |
514 | */ | |
2c14f28b | 515 | void drm_sysfs_device_remove(struct drm_minor *minor) |
1da177e4 | 516 | { |
2c14f28b | 517 | device_unregister(&minor->kdev); |
1da177e4 | 518 | } |
327c225b TH |
519 | |
520 | ||
521 | /** | |
522 | * drm_class_device_register - Register a struct device in the drm class. | |
523 | * | |
524 | * @dev: pointer to struct device to register. | |
525 | * | |
526 | * @dev should have all relevant members pre-filled with the exception | |
527 | * of the class member. In particular, the device_type member must | |
528 | * be set. | |
529 | */ | |
530 | ||
531 | int drm_class_device_register(struct device *dev) | |
532 | { | |
533 | dev->class = drm_class; | |
534 | return device_register(dev); | |
535 | } | |
536 | EXPORT_SYMBOL_GPL(drm_class_device_register); | |
537 | ||
538 | void drm_class_device_unregister(struct device *dev) | |
539 | { | |
540 | return device_unregister(dev); | |
541 | } | |
542 | EXPORT_SYMBOL_GPL(drm_class_device_unregister); |