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 | ||
19 | #include "drm_core.h" | |
f210973b | 20 | #include "drmP.h" |
1da177e4 | 21 | |
2c14f28b | 22 | #define to_drm_minor(d) container_of(d, struct drm_minor, kdev) |
f453ba04 | 23 | #define to_drm_connector(d) container_of(d, struct drm_connector, kdev) |
e8b962b6 JB |
24 | |
25 | /** | |
26 | * drm_sysfs_suspend - DRM class suspend hook | |
27 | * @dev: Linux device to suspend | |
28 | * @state: power state to enter | |
29 | * | |
30 | * Just figures out what the actual struct drm_device associated with | |
31 | * @dev is and calls its suspend hook, if present. | |
32 | */ | |
33 | static int drm_sysfs_suspend(struct device *dev, pm_message_t state) | |
34 | { | |
2c14f28b DA |
35 | struct drm_minor *drm_minor = to_drm_minor(dev); |
36 | struct drm_device *drm_dev = drm_minor->dev; | |
e8b962b6 | 37 | |
f453ba04 | 38 | if (drm_minor->type == DRM_MINOR_LEGACY && drm_dev->driver->suspend) |
b932ccb5 | 39 | return drm_dev->driver->suspend(drm_dev, state); |
e8b962b6 JB |
40 | |
41 | return 0; | |
42 | } | |
43 | ||
44 | /** | |
45 | * drm_sysfs_resume - DRM class resume hook | |
46 | * @dev: Linux device to resume | |
47 | * | |
48 | * Just figures out what the actual struct drm_device associated with | |
49 | * @dev is and calls its resume hook, if present. | |
50 | */ | |
51 | static int drm_sysfs_resume(struct device *dev) | |
52 | { | |
2c14f28b DA |
53 | struct drm_minor *drm_minor = to_drm_minor(dev); |
54 | struct drm_device *drm_dev = drm_minor->dev; | |
e8b962b6 | 55 | |
f453ba04 | 56 | if (drm_minor->type == DRM_MINOR_LEGACY && drm_dev->driver->resume) |
e8b962b6 JB |
57 | return drm_dev->driver->resume(drm_dev); |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
1da177e4 LT |
62 | /* Display the version of drm_core. This doesn't work right in current design */ |
63 | static ssize_t version_show(struct class *dev, char *buf) | |
64 | { | |
65 | return sprintf(buf, "%s %d.%d.%d %s\n", CORE_NAME, CORE_MAJOR, | |
66 | CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); | |
67 | } | |
68 | ||
69 | static CLASS_ATTR(version, S_IRUGO, version_show, NULL); | |
70 | ||
71 | /** | |
72 | * drm_sysfs_create - create a struct drm_sysfs_class structure | |
73 | * @owner: pointer to the module that is to "own" this struct drm_sysfs_class | |
74 | * @name: pointer to a string for the name of this class. | |
75 | * | |
e8b962b6 | 76 | * This is used to create DRM class pointer that can then be used |
1da177e4 LT |
77 | * in calls to drm_sysfs_device_add(). |
78 | * | |
79 | * Note, the pointer created here is to be destroyed when finished by making a | |
80 | * call to drm_sysfs_destroy(). | |
81 | */ | |
0650fd58 | 82 | struct class *drm_sysfs_create(struct module *owner, char *name) |
1da177e4 | 83 | { |
0650fd58 | 84 | struct class *class; |
24f73c92 | 85 | int err; |
0650fd58 GKH |
86 | |
87 | class = class_create(owner, name); | |
94f060bd AM |
88 | if (IS_ERR(class)) { |
89 | err = PTR_ERR(class); | |
24f73c92 JG |
90 | goto err_out; |
91 | } | |
92 | ||
e8b962b6 JB |
93 | class->suspend = drm_sysfs_suspend; |
94 | class->resume = drm_sysfs_resume; | |
95 | ||
24f73c92 JG |
96 | err = class_create_file(class, &class_attr_version); |
97 | if (err) | |
98 | goto err_out_class; | |
0650fd58 | 99 | |
0650fd58 | 100 | return class; |
24f73c92 JG |
101 | |
102 | err_out_class: | |
103 | class_destroy(class); | |
104 | err_out: | |
105 | return ERR_PTR(err); | |
1da177e4 LT |
106 | } |
107 | ||
108 | /** | |
e8b962b6 | 109 | * drm_sysfs_destroy - destroys DRM class |
1da177e4 | 110 | * |
e8b962b6 | 111 | * Destroy the DRM device class. |
1da177e4 | 112 | */ |
e8b962b6 | 113 | void drm_sysfs_destroy(void) |
1da177e4 | 114 | { |
e8b962b6 | 115 | if ((drm_class == NULL) || (IS_ERR(drm_class))) |
1da177e4 | 116 | return; |
e8b962b6 JB |
117 | class_remove_file(drm_class, &class_attr_version); |
118 | class_destroy(drm_class); | |
1da177e4 LT |
119 | } |
120 | ||
e8b962b6 JB |
121 | static ssize_t show_dri(struct device *device, struct device_attribute *attr, |
122 | char *buf) | |
732052ed | 123 | { |
2c14f28b DA |
124 | struct drm_minor *drm_minor = to_drm_minor(device); |
125 | struct drm_device *drm_dev = drm_minor->dev; | |
126 | if (drm_dev->driver->dri_library_name) | |
127 | return drm_dev->driver->dri_library_name(drm_dev, buf); | |
128 | return snprintf(buf, PAGE_SIZE, "%s\n", drm_dev->driver->pci_driver.name); | |
732052ed DA |
129 | } |
130 | ||
e8b962b6 | 131 | static struct device_attribute device_attrs[] = { |
732052ed DA |
132 | __ATTR(dri_library_name, S_IRUGO, show_dri, NULL), |
133 | }; | |
134 | ||
e8b962b6 JB |
135 | /** |
136 | * drm_sysfs_device_release - do nothing | |
137 | * @dev: Linux device | |
138 | * | |
139 | * Normally, this would free the DRM device associated with @dev, along | |
140 | * with cleaning up any other stuff. But we do that in the DRM core, so | |
141 | * this function can just return and hope that the core does its job. | |
142 | */ | |
143 | static void drm_sysfs_device_release(struct device *dev) | |
144 | { | |
145 | return; | |
146 | } | |
147 | ||
f453ba04 DA |
148 | /* |
149 | * Connector properties | |
150 | */ | |
151 | static ssize_t status_show(struct device *device, | |
152 | struct device_attribute *attr, | |
153 | char *buf) | |
154 | { | |
155 | struct drm_connector *connector = to_drm_connector(device); | |
156 | enum drm_connector_status status; | |
157 | ||
158 | status = connector->funcs->detect(connector); | |
159 | return snprintf(buf, PAGE_SIZE, "%s", | |
160 | drm_get_connector_status_name(status)); | |
161 | } | |
162 | ||
163 | static ssize_t dpms_show(struct device *device, | |
164 | struct device_attribute *attr, | |
165 | char *buf) | |
166 | { | |
167 | struct drm_connector *connector = to_drm_connector(device); | |
168 | struct drm_device *dev = connector->dev; | |
169 | uint64_t dpms_status; | |
170 | int ret; | |
171 | ||
172 | ret = drm_connector_property_get_value(connector, | |
173 | dev->mode_config.dpms_property, | |
174 | &dpms_status); | |
175 | if (ret) | |
176 | return 0; | |
177 | ||
178 | return snprintf(buf, PAGE_SIZE, "%s", | |
179 | drm_get_dpms_name((int)dpms_status)); | |
180 | } | |
181 | ||
182 | static ssize_t enabled_show(struct device *device, | |
183 | struct device_attribute *attr, | |
184 | char *buf) | |
185 | { | |
186 | struct drm_connector *connector = to_drm_connector(device); | |
187 | ||
188 | return snprintf(buf, PAGE_SIZE, connector->encoder ? "enabled" : | |
189 | "disabled"); | |
190 | } | |
191 | ||
192 | static ssize_t edid_show(struct kobject *kobj, struct bin_attribute *attr, | |
193 | char *buf, loff_t off, size_t count) | |
194 | { | |
195 | struct device *connector_dev = container_of(kobj, struct device, kobj); | |
196 | struct drm_connector *connector = to_drm_connector(connector_dev); | |
197 | unsigned char *edid; | |
198 | size_t size; | |
199 | ||
200 | if (!connector->edid_blob_ptr) | |
201 | return 0; | |
202 | ||
203 | edid = connector->edid_blob_ptr->data; | |
204 | size = connector->edid_blob_ptr->length; | |
205 | if (!edid) | |
206 | return 0; | |
207 | ||
208 | if (off >= size) | |
209 | return 0; | |
210 | ||
211 | if (off + count > size) | |
212 | count = size - off; | |
213 | memcpy(buf, edid + off, count); | |
214 | ||
215 | return count; | |
216 | } | |
217 | ||
218 | static ssize_t modes_show(struct device *device, | |
219 | struct device_attribute *attr, | |
220 | char *buf) | |
221 | { | |
222 | struct drm_connector *connector = to_drm_connector(device); | |
223 | struct drm_display_mode *mode; | |
224 | int written = 0; | |
225 | ||
226 | list_for_each_entry(mode, &connector->modes, head) { | |
227 | written += snprintf(buf + written, PAGE_SIZE - written, "%s\n", | |
228 | mode->name); | |
229 | } | |
230 | ||
231 | return written; | |
232 | } | |
233 | ||
234 | static ssize_t subconnector_show(struct device *device, | |
235 | struct device_attribute *attr, | |
236 | char *buf) | |
237 | { | |
238 | struct drm_connector *connector = to_drm_connector(device); | |
239 | struct drm_device *dev = connector->dev; | |
240 | struct drm_property *prop = NULL; | |
241 | uint64_t subconnector; | |
242 | int is_tv = 0; | |
243 | int ret; | |
244 | ||
245 | switch (connector->connector_type) { | |
246 | case DRM_MODE_CONNECTOR_DVII: | |
247 | prop = dev->mode_config.dvi_i_subconnector_property; | |
248 | break; | |
249 | case DRM_MODE_CONNECTOR_Composite: | |
250 | case DRM_MODE_CONNECTOR_SVIDEO: | |
251 | case DRM_MODE_CONNECTOR_Component: | |
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: | |
292 | prop = dev->mode_config.tv_select_subconnector_property; | |
293 | is_tv = 1; | |
294 | break; | |
295 | default: | |
296 | DRM_ERROR("Wrong connector type for this property\n"); | |
297 | return 0; | |
298 | } | |
299 | ||
300 | if (!prop) { | |
301 | DRM_ERROR("Unable to find select subconnector property\n"); | |
302 | return 0; | |
303 | } | |
304 | ||
305 | ret = drm_connector_property_get_value(connector, prop, &subconnector); | |
306 | if (ret) | |
307 | return 0; | |
308 | ||
309 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? | |
310 | drm_get_tv_select_name((int)subconnector) : | |
311 | drm_get_dvi_i_select_name((int)subconnector)); | |
312 | } | |
313 | ||
314 | static struct device_attribute connector_attrs[] = { | |
315 | __ATTR_RO(status), | |
316 | __ATTR_RO(enabled), | |
317 | __ATTR_RO(dpms), | |
318 | __ATTR_RO(modes), | |
319 | }; | |
320 | ||
321 | /* These attributes are for both DVI-I connectors and all types of tv-out. */ | |
322 | static struct device_attribute connector_attrs_opt1[] = { | |
323 | __ATTR_RO(subconnector), | |
324 | __ATTR_RO(select_subconnector), | |
325 | }; | |
326 | ||
327 | static struct bin_attribute edid_attr = { | |
328 | .attr.name = "edid", | |
329 | .size = 128, | |
330 | .read = edid_show, | |
331 | }; | |
332 | ||
333 | /** | |
334 | * drm_sysfs_connector_add - add an connector to sysfs | |
335 | * @connector: connector to add | |
336 | * | |
337 | * Create an connector device in sysfs, along with its associated connector | |
338 | * properties (so far, connection status, dpms, mode list & edid) and | |
339 | * generate a hotplug event so userspace knows there's a new connector | |
340 | * available. | |
341 | * | |
342 | * Note: | |
343 | * This routine should only be called *once* for each DRM minor registered. | |
344 | * A second call for an already registered device will trigger the BUG_ON | |
345 | * below. | |
346 | */ | |
347 | int drm_sysfs_connector_add(struct drm_connector *connector) | |
348 | { | |
349 | struct drm_device *dev = connector->dev; | |
350 | int ret = 0, i, j; | |
351 | ||
352 | /* We shouldn't get called more than once for the same connector */ | |
353 | BUG_ON(device_is_registered(&connector->kdev)); | |
354 | ||
355 | connector->kdev.parent = &dev->primary->kdev; | |
356 | connector->kdev.class = drm_class; | |
357 | connector->kdev.release = drm_sysfs_device_release; | |
358 | ||
359 | DRM_DEBUG("adding \"%s\" to sysfs\n", | |
360 | drm_get_connector_name(connector)); | |
361 | ||
362 | snprintf(connector->kdev.bus_id, BUS_ID_SIZE, "card%d-%s", | |
363 | dev->primary->index, drm_get_connector_name(connector)); | |
364 | ret = device_register(&connector->kdev); | |
365 | ||
366 | if (ret) { | |
367 | DRM_ERROR("failed to register connector device: %d\n", ret); | |
368 | goto out; | |
369 | } | |
370 | ||
371 | /* Standard attributes */ | |
372 | ||
373 | for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) { | |
374 | ret = device_create_file(&connector->kdev, &connector_attrs[i]); | |
375 | if (ret) | |
376 | goto err_out_files; | |
377 | } | |
378 | ||
379 | /* Optional attributes */ | |
380 | /* | |
381 | * In the long run it maybe a good idea to make one set of | |
382 | * optionals per connector type. | |
383 | */ | |
384 | switch (connector->connector_type) { | |
385 | case DRM_MODE_CONNECTOR_DVII: | |
386 | case DRM_MODE_CONNECTOR_Composite: | |
387 | case DRM_MODE_CONNECTOR_SVIDEO: | |
388 | case DRM_MODE_CONNECTOR_Component: | |
389 | for (i = 0; i < ARRAY_SIZE(connector_attrs_opt1); i++) { | |
390 | ret = device_create_file(&connector->kdev, &connector_attrs_opt1[i]); | |
391 | if (ret) | |
392 | goto err_out_files; | |
393 | } | |
394 | break; | |
395 | default: | |
396 | break; | |
397 | } | |
398 | ||
399 | ret = sysfs_create_bin_file(&connector->kdev.kobj, &edid_attr); | |
400 | if (ret) | |
401 | goto err_out_files; | |
402 | ||
403 | /* Let userspace know we have a new connector */ | |
404 | drm_sysfs_hotplug_event(dev); | |
405 | ||
406 | return 0; | |
407 | ||
408 | err_out_files: | |
409 | if (i > 0) | |
410 | for (j = 0; j < i; j++) | |
411 | device_remove_file(&connector->kdev, | |
412 | &connector_attrs[i]); | |
413 | device_unregister(&connector->kdev); | |
414 | ||
415 | out: | |
416 | return ret; | |
417 | } | |
418 | EXPORT_SYMBOL(drm_sysfs_connector_add); | |
419 | ||
420 | /** | |
421 | * drm_sysfs_connector_remove - remove an connector device from sysfs | |
422 | * @connector: connector to remove | |
423 | * | |
424 | * Remove @connector and its associated attributes from sysfs. Note that | |
425 | * the device model core will take care of sending the "remove" uevent | |
426 | * at this time, so we don't need to do it. | |
427 | * | |
428 | * Note: | |
429 | * This routine should only be called if the connector was previously | |
430 | * successfully registered. If @connector hasn't been registered yet, | |
431 | * you'll likely see a panic somewhere deep in sysfs code when called. | |
432 | */ | |
433 | void drm_sysfs_connector_remove(struct drm_connector *connector) | |
434 | { | |
435 | int i; | |
436 | ||
437 | DRM_DEBUG("removing \"%s\" from sysfs\n", | |
438 | drm_get_connector_name(connector)); | |
439 | ||
440 | for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) | |
441 | device_remove_file(&connector->kdev, &connector_attrs[i]); | |
442 | sysfs_remove_bin_file(&connector->kdev.kobj, &edid_attr); | |
443 | device_unregister(&connector->kdev); | |
444 | } | |
445 | EXPORT_SYMBOL(drm_sysfs_connector_remove); | |
446 | ||
447 | /** | |
448 | * drm_sysfs_hotplug_event - generate a DRM uevent | |
449 | * @dev: DRM device | |
450 | * | |
451 | * Send a uevent for the DRM device specified by @dev. Currently we only | |
452 | * set HOTPLUG=1 in the uevent environment, but this could be expanded to | |
453 | * deal with other types of events. | |
454 | */ | |
455 | void drm_sysfs_hotplug_event(struct drm_device *dev) | |
456 | { | |
457 | char *event_string = "HOTPLUG=1"; | |
458 | char *envp[] = { event_string, NULL }; | |
459 | ||
460 | DRM_DEBUG("generating hotplug event\n"); | |
461 | ||
462 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, envp); | |
463 | } | |
464 | ||
1da177e4 LT |
465 | /** |
466 | * drm_sysfs_device_add - adds a class device to sysfs for a character driver | |
e8b962b6 JB |
467 | * @dev: DRM device to be added |
468 | * @head: DRM head in question | |
1da177e4 | 469 | * |
e8b962b6 JB |
470 | * Add a DRM device to the DRM's device model class. We use @dev's PCI device |
471 | * as the parent for the Linux device, and make sure it has a file containing | |
472 | * the driver we're using (for userspace compatibility). | |
1da177e4 | 473 | */ |
2c14f28b | 474 | int drm_sysfs_device_add(struct drm_minor *minor) |
1da177e4 | 475 | { |
e8b962b6 JB |
476 | int err; |
477 | int i, j; | |
2c14f28b | 478 | char *minor_str; |
e8b962b6 | 479 | |
2c14f28b DA |
480 | minor->kdev.parent = &minor->dev->pdev->dev; |
481 | minor->kdev.class = drm_class; | |
482 | minor->kdev.release = drm_sysfs_device_release; | |
483 | minor->kdev.devt = minor->device; | |
f453ba04 DA |
484 | if (minor->type == DRM_MINOR_CONTROL) |
485 | minor_str = "controlD%d"; | |
486 | else if (minor->type == DRM_MINOR_RENDER) | |
487 | minor_str = "renderD%d"; | |
488 | else | |
489 | minor_str = "card%d"; | |
e8b962b6 | 490 | |
2c14f28b DA |
491 | snprintf(minor->kdev.bus_id, BUS_ID_SIZE, minor_str, minor->index); |
492 | ||
493 | err = device_register(&minor->kdev); | |
e8b962b6 JB |
494 | if (err) { |
495 | DRM_ERROR("device add failed: %d\n", err); | |
24f73c92 JG |
496 | goto err_out; |
497 | } | |
1da177e4 | 498 | |
e8b962b6 | 499 | for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { |
2c14f28b | 500 | err = device_create_file(&minor->kdev, &device_attrs[i]); |
24f73c92 JG |
501 | if (err) |
502 | goto err_out_files; | |
503 | } | |
504 | ||
e8b962b6 | 505 | return 0; |
24f73c92 JG |
506 | |
507 | err_out_files: | |
508 | if (i > 0) | |
509 | for (j = 0; j < i; j++) | |
38eda211 | 510 | device_remove_file(&minor->kdev, &device_attrs[j]); |
2c14f28b | 511 | device_unregister(&minor->kdev); |
24f73c92 | 512 | err_out: |
e8b962b6 JB |
513 | |
514 | return err; | |
1da177e4 LT |
515 | } |
516 | ||
517 | /** | |
e8b962b6 JB |
518 | * drm_sysfs_device_remove - remove DRM device |
519 | * @dev: DRM device to remove | |
1da177e4 LT |
520 | * |
521 | * This call unregisters and cleans up a class device that was created with a | |
522 | * call to drm_sysfs_device_add() | |
523 | */ | |
2c14f28b | 524 | void drm_sysfs_device_remove(struct drm_minor *minor) |
1da177e4 | 525 | { |
732052ed DA |
526 | int i; |
527 | ||
e8b962b6 | 528 | for (i = 0; i < ARRAY_SIZE(device_attrs); i++) |
2c14f28b DA |
529 | device_remove_file(&minor->kdev, &device_attrs[i]); |
530 | device_unregister(&minor->kdev); | |
1da177e4 | 531 | } |