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 | 24 | |
08e4d534 TH |
25 | static struct device_type drm_sysfs_device_minor = { |
26 | .name = "drm_minor" | |
27 | }; | |
28 | ||
e8b962b6 | 29 | /** |
08e4d534 | 30 | * drm_class_suspend - DRM class suspend hook |
e8b962b6 JB |
31 | * @dev: Linux device to suspend |
32 | * @state: power state to enter | |
33 | * | |
34 | * Just figures out what the actual struct drm_device associated with | |
35 | * @dev is and calls its suspend hook, if present. | |
36 | */ | |
08e4d534 | 37 | static int drm_class_suspend(struct device *dev, pm_message_t state) |
e8b962b6 | 38 | { |
08e4d534 TH |
39 | if (dev->type == &drm_sysfs_device_minor) { |
40 | struct drm_minor *drm_minor = to_drm_minor(dev); | |
41 | struct drm_device *drm_dev = drm_minor->dev; | |
42 | ||
43 | if (drm_minor->type == DRM_MINOR_LEGACY && | |
44 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && | |
45 | drm_dev->driver->suspend) | |
46 | return drm_dev->driver->suspend(drm_dev, state); | |
47 | } | |
e8b962b6 JB |
48 | return 0; |
49 | } | |
50 | ||
51 | /** | |
08e4d534 | 52 | * drm_class_resume - DRM class resume hook |
e8b962b6 JB |
53 | * @dev: Linux device to resume |
54 | * | |
55 | * Just figures out what the actual struct drm_device associated with | |
56 | * @dev is and calls its resume hook, if present. | |
57 | */ | |
08e4d534 | 58 | static int drm_class_resume(struct device *dev) |
e8b962b6 | 59 | { |
08e4d534 TH |
60 | if (dev->type == &drm_sysfs_device_minor) { |
61 | struct drm_minor *drm_minor = to_drm_minor(dev); | |
62 | struct drm_device *drm_dev = drm_minor->dev; | |
63 | ||
64 | if (drm_minor->type == DRM_MINOR_LEGACY && | |
65 | !drm_core_check_feature(drm_dev, DRIVER_MODESET) && | |
66 | drm_dev->driver->resume) | |
67 | return drm_dev->driver->resume(drm_dev); | |
68 | } | |
e8b962b6 JB |
69 | return 0; |
70 | } | |
71 | ||
1da177e4 LT |
72 | /* Display the version of drm_core. This doesn't work right in current design */ |
73 | static ssize_t version_show(struct class *dev, char *buf) | |
74 | { | |
75 | return sprintf(buf, "%s %d.%d.%d %s\n", CORE_NAME, CORE_MAJOR, | |
76 | CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); | |
77 | } | |
78 | ||
e454cea2 | 79 | static char *drm_devnode(struct device *dev, mode_t *mode) |
02200d06 KS |
80 | { |
81 | return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev)); | |
82 | } | |
83 | ||
1da177e4 LT |
84 | static CLASS_ATTR(version, S_IRUGO, version_show, NULL); |
85 | ||
86 | /** | |
87 | * drm_sysfs_create - create a struct drm_sysfs_class structure | |
88 | * @owner: pointer to the module that is to "own" this struct drm_sysfs_class | |
89 | * @name: pointer to a string for the name of this class. | |
90 | * | |
e8b962b6 | 91 | * This is used to create DRM class pointer that can then be used |
1da177e4 LT |
92 | * in calls to drm_sysfs_device_add(). |
93 | * | |
94 | * Note, the pointer created here is to be destroyed when finished by making a | |
95 | * call to drm_sysfs_destroy(). | |
96 | */ | |
0650fd58 | 97 | struct class *drm_sysfs_create(struct module *owner, char *name) |
1da177e4 | 98 | { |
0650fd58 | 99 | struct class *class; |
24f73c92 | 100 | int err; |
0650fd58 GKH |
101 | |
102 | class = class_create(owner, name); | |
94f060bd AM |
103 | if (IS_ERR(class)) { |
104 | err = PTR_ERR(class); | |
24f73c92 JG |
105 | goto err_out; |
106 | } | |
107 | ||
08e4d534 TH |
108 | class->suspend = drm_class_suspend; |
109 | class->resume = drm_class_resume; | |
e8b962b6 | 110 | |
24f73c92 JG |
111 | err = class_create_file(class, &class_attr_version); |
112 | if (err) | |
113 | goto err_out_class; | |
0650fd58 | 114 | |
e454cea2 | 115 | class->devnode = drm_devnode; |
02200d06 | 116 | |
0650fd58 | 117 | return class; |
24f73c92 JG |
118 | |
119 | err_out_class: | |
120 | class_destroy(class); | |
121 | err_out: | |
122 | return ERR_PTR(err); | |
1da177e4 LT |
123 | } |
124 | ||
125 | /** | |
e8b962b6 | 126 | * drm_sysfs_destroy - destroys DRM class |
1da177e4 | 127 | * |
e8b962b6 | 128 | * Destroy the DRM device class. |
1da177e4 | 129 | */ |
e8b962b6 | 130 | void drm_sysfs_destroy(void) |
1da177e4 | 131 | { |
e8b962b6 | 132 | if ((drm_class == NULL) || (IS_ERR(drm_class))) |
1da177e4 | 133 | return; |
e8b962b6 JB |
134 | class_remove_file(drm_class, &class_attr_version); |
135 | class_destroy(drm_class); | |
1da177e4 LT |
136 | } |
137 | ||
e8b962b6 JB |
138 | /** |
139 | * drm_sysfs_device_release - do nothing | |
140 | * @dev: Linux device | |
141 | * | |
142 | * Normally, this would free the DRM device associated with @dev, along | |
143 | * with cleaning up any other stuff. But we do that in the DRM core, so | |
144 | * this function can just return and hope that the core does its job. | |
145 | */ | |
146 | static void drm_sysfs_device_release(struct device *dev) | |
147 | { | |
77d26dc9 | 148 | memset(dev, 0, sizeof(struct device)); |
e8b962b6 JB |
149 | return; |
150 | } | |
151 | ||
f453ba04 DA |
152 | /* |
153 | * Connector properties | |
154 | */ | |
155 | static ssize_t status_show(struct device *device, | |
156 | struct device_attribute *attr, | |
157 | char *buf) | |
158 | { | |
159 | struct drm_connector *connector = to_drm_connector(device); | |
160 | enum drm_connector_status status; | |
161 | ||
162 | status = connector->funcs->detect(connector); | |
75185c92 | 163 | return snprintf(buf, PAGE_SIZE, "%s\n", |
f453ba04 DA |
164 | drm_get_connector_status_name(status)); |
165 | } | |
166 | ||
167 | static ssize_t dpms_show(struct device *device, | |
168 | struct device_attribute *attr, | |
169 | char *buf) | |
170 | { | |
171 | struct drm_connector *connector = to_drm_connector(device); | |
172 | struct drm_device *dev = connector->dev; | |
173 | uint64_t dpms_status; | |
174 | int ret; | |
175 | ||
176 | ret = drm_connector_property_get_value(connector, | |
177 | dev->mode_config.dpms_property, | |
178 | &dpms_status); | |
179 | if (ret) | |
180 | return 0; | |
181 | ||
75185c92 | 182 | return snprintf(buf, PAGE_SIZE, "%s\n", |
f453ba04 DA |
183 | drm_get_dpms_name((int)dpms_status)); |
184 | } | |
185 | ||
186 | static ssize_t enabled_show(struct device *device, | |
187 | struct device_attribute *attr, | |
188 | char *buf) | |
189 | { | |
190 | struct drm_connector *connector = to_drm_connector(device); | |
191 | ||
75185c92 | 192 | return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" : |
f453ba04 DA |
193 | "disabled"); |
194 | } | |
195 | ||
196 | static ssize_t edid_show(struct kobject *kobj, struct bin_attribute *attr, | |
197 | char *buf, loff_t off, size_t count) | |
198 | { | |
199 | struct device *connector_dev = container_of(kobj, struct device, kobj); | |
200 | struct drm_connector *connector = to_drm_connector(connector_dev); | |
201 | unsigned char *edid; | |
202 | size_t size; | |
203 | ||
204 | if (!connector->edid_blob_ptr) | |
205 | return 0; | |
206 | ||
207 | edid = connector->edid_blob_ptr->data; | |
208 | size = connector->edid_blob_ptr->length; | |
209 | if (!edid) | |
210 | return 0; | |
211 | ||
212 | if (off >= size) | |
213 | return 0; | |
214 | ||
215 | if (off + count > size) | |
216 | count = size - off; | |
217 | memcpy(buf, edid + off, count); | |
218 | ||
219 | return count; | |
220 | } | |
221 | ||
222 | static ssize_t modes_show(struct device *device, | |
223 | struct device_attribute *attr, | |
224 | char *buf) | |
225 | { | |
226 | struct drm_connector *connector = to_drm_connector(device); | |
227 | struct drm_display_mode *mode; | |
228 | int written = 0; | |
229 | ||
230 | list_for_each_entry(mode, &connector->modes, head) { | |
231 | written += snprintf(buf + written, PAGE_SIZE - written, "%s\n", | |
232 | mode->name); | |
233 | } | |
234 | ||
235 | return written; | |
236 | } | |
237 | ||
238 | static ssize_t subconnector_show(struct device *device, | |
239 | struct device_attribute *attr, | |
240 | char *buf) | |
241 | { | |
242 | struct drm_connector *connector = to_drm_connector(device); | |
243 | struct drm_device *dev = connector->dev; | |
244 | struct drm_property *prop = NULL; | |
245 | uint64_t subconnector; | |
246 | int is_tv = 0; | |
247 | int ret; | |
248 | ||
249 | switch (connector->connector_type) { | |
250 | case DRM_MODE_CONNECTOR_DVII: | |
251 | prop = dev->mode_config.dvi_i_subconnector_property; | |
252 | break; | |
253 | case DRM_MODE_CONNECTOR_Composite: | |
254 | case DRM_MODE_CONNECTOR_SVIDEO: | |
255 | case DRM_MODE_CONNECTOR_Component: | |
256 | prop = dev->mode_config.tv_subconnector_property; | |
257 | is_tv = 1; | |
258 | break; | |
259 | default: | |
260 | DRM_ERROR("Wrong connector type for this property\n"); | |
261 | return 0; | |
262 | } | |
263 | ||
264 | if (!prop) { | |
265 | DRM_ERROR("Unable to find subconnector property\n"); | |
266 | return 0; | |
267 | } | |
268 | ||
269 | ret = drm_connector_property_get_value(connector, prop, &subconnector); | |
270 | if (ret) | |
271 | return 0; | |
272 | ||
273 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? | |
274 | drm_get_tv_subconnector_name((int)subconnector) : | |
275 | drm_get_dvi_i_subconnector_name((int)subconnector)); | |
276 | } | |
277 | ||
278 | static ssize_t select_subconnector_show(struct device *device, | |
279 | struct device_attribute *attr, | |
280 | char *buf) | |
281 | { | |
282 | struct drm_connector *connector = to_drm_connector(device); | |
283 | struct drm_device *dev = connector->dev; | |
284 | struct drm_property *prop = NULL; | |
285 | uint64_t subconnector; | |
286 | int is_tv = 0; | |
287 | int ret; | |
288 | ||
289 | switch (connector->connector_type) { | |
290 | case DRM_MODE_CONNECTOR_DVII: | |
291 | prop = dev->mode_config.dvi_i_select_subconnector_property; | |
292 | break; | |
293 | case DRM_MODE_CONNECTOR_Composite: | |
294 | case DRM_MODE_CONNECTOR_SVIDEO: | |
295 | case DRM_MODE_CONNECTOR_Component: | |
296 | prop = dev->mode_config.tv_select_subconnector_property; | |
297 | is_tv = 1; | |
298 | break; | |
299 | default: | |
300 | DRM_ERROR("Wrong connector type for this property\n"); | |
301 | return 0; | |
302 | } | |
303 | ||
304 | if (!prop) { | |
305 | DRM_ERROR("Unable to find select subconnector property\n"); | |
306 | return 0; | |
307 | } | |
308 | ||
309 | ret = drm_connector_property_get_value(connector, prop, &subconnector); | |
310 | if (ret) | |
311 | return 0; | |
312 | ||
313 | return snprintf(buf, PAGE_SIZE, "%s", is_tv ? | |
314 | drm_get_tv_select_name((int)subconnector) : | |
315 | drm_get_dvi_i_select_name((int)subconnector)); | |
316 | } | |
317 | ||
318 | static struct device_attribute connector_attrs[] = { | |
319 | __ATTR_RO(status), | |
320 | __ATTR_RO(enabled), | |
321 | __ATTR_RO(dpms), | |
322 | __ATTR_RO(modes), | |
323 | }; | |
324 | ||
325 | /* These attributes are for both DVI-I connectors and all types of tv-out. */ | |
326 | static struct device_attribute connector_attrs_opt1[] = { | |
327 | __ATTR_RO(subconnector), | |
328 | __ATTR_RO(select_subconnector), | |
329 | }; | |
330 | ||
331 | static struct bin_attribute edid_attr = { | |
332 | .attr.name = "edid", | |
e36ebaf4 | 333 | .attr.mode = 0444, |
f453ba04 DA |
334 | .size = 128, |
335 | .read = edid_show, | |
336 | }; | |
337 | ||
338 | /** | |
339 | * drm_sysfs_connector_add - add an connector to sysfs | |
340 | * @connector: connector to add | |
341 | * | |
342 | * Create an connector device in sysfs, along with its associated connector | |
343 | * properties (so far, connection status, dpms, mode list & edid) and | |
344 | * generate a hotplug event so userspace knows there's a new connector | |
345 | * available. | |
346 | * | |
347 | * Note: | |
348 | * This routine should only be called *once* for each DRM minor registered. | |
349 | * A second call for an already registered device will trigger the BUG_ON | |
350 | * below. | |
351 | */ | |
352 | int drm_sysfs_connector_add(struct drm_connector *connector) | |
353 | { | |
354 | struct drm_device *dev = connector->dev; | |
355 | int ret = 0, i, j; | |
356 | ||
357 | /* We shouldn't get called more than once for the same connector */ | |
358 | BUG_ON(device_is_registered(&connector->kdev)); | |
359 | ||
360 | connector->kdev.parent = &dev->primary->kdev; | |
361 | connector->kdev.class = drm_class; | |
362 | connector->kdev.release = drm_sysfs_device_release; | |
363 | ||
364 | DRM_DEBUG("adding \"%s\" to sysfs\n", | |
365 | drm_get_connector_name(connector)); | |
366 | ||
2ead054c KS |
367 | dev_set_name(&connector->kdev, "card%d-%s", |
368 | dev->primary->index, drm_get_connector_name(connector)); | |
f453ba04 DA |
369 | ret = device_register(&connector->kdev); |
370 | ||
371 | if (ret) { | |
372 | DRM_ERROR("failed to register connector device: %d\n", ret); | |
373 | goto out; | |
374 | } | |
375 | ||
376 | /* Standard attributes */ | |
377 | ||
378 | for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) { | |
379 | ret = device_create_file(&connector->kdev, &connector_attrs[i]); | |
380 | if (ret) | |
381 | goto err_out_files; | |
382 | } | |
383 | ||
384 | /* Optional attributes */ | |
385 | /* | |
386 | * In the long run it maybe a good idea to make one set of | |
387 | * optionals per connector type. | |
388 | */ | |
389 | switch (connector->connector_type) { | |
390 | case DRM_MODE_CONNECTOR_DVII: | |
391 | case DRM_MODE_CONNECTOR_Composite: | |
392 | case DRM_MODE_CONNECTOR_SVIDEO: | |
393 | case DRM_MODE_CONNECTOR_Component: | |
394 | for (i = 0; i < ARRAY_SIZE(connector_attrs_opt1); i++) { | |
395 | ret = device_create_file(&connector->kdev, &connector_attrs_opt1[i]); | |
396 | if (ret) | |
397 | goto err_out_files; | |
398 | } | |
399 | break; | |
400 | default: | |
401 | break; | |
402 | } | |
403 | ||
404 | ret = sysfs_create_bin_file(&connector->kdev.kobj, &edid_attr); | |
405 | if (ret) | |
406 | goto err_out_files; | |
407 | ||
408 | /* Let userspace know we have a new connector */ | |
409 | drm_sysfs_hotplug_event(dev); | |
410 | ||
411 | return 0; | |
412 | ||
413 | err_out_files: | |
414 | if (i > 0) | |
415 | for (j = 0; j < i; j++) | |
416 | device_remove_file(&connector->kdev, | |
417 | &connector_attrs[i]); | |
418 | device_unregister(&connector->kdev); | |
419 | ||
420 | out: | |
421 | return ret; | |
422 | } | |
423 | EXPORT_SYMBOL(drm_sysfs_connector_add); | |
424 | ||
425 | /** | |
426 | * drm_sysfs_connector_remove - remove an connector device from sysfs | |
427 | * @connector: connector to remove | |
428 | * | |
429 | * Remove @connector and its associated attributes from sysfs. Note that | |
430 | * the device model core will take care of sending the "remove" uevent | |
431 | * at this time, so we don't need to do it. | |
432 | * | |
433 | * Note: | |
434 | * This routine should only be called if the connector was previously | |
435 | * successfully registered. If @connector hasn't been registered yet, | |
436 | * you'll likely see a panic somewhere deep in sysfs code when called. | |
437 | */ | |
438 | void drm_sysfs_connector_remove(struct drm_connector *connector) | |
439 | { | |
440 | int i; | |
441 | ||
442 | DRM_DEBUG("removing \"%s\" from sysfs\n", | |
443 | drm_get_connector_name(connector)); | |
444 | ||
445 | for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) | |
446 | device_remove_file(&connector->kdev, &connector_attrs[i]); | |
447 | sysfs_remove_bin_file(&connector->kdev.kobj, &edid_attr); | |
448 | device_unregister(&connector->kdev); | |
449 | } | |
450 | EXPORT_SYMBOL(drm_sysfs_connector_remove); | |
451 | ||
452 | /** | |
453 | * drm_sysfs_hotplug_event - generate a DRM uevent | |
454 | * @dev: DRM device | |
455 | * | |
456 | * Send a uevent for the DRM device specified by @dev. Currently we only | |
457 | * set HOTPLUG=1 in the uevent environment, but this could be expanded to | |
458 | * deal with other types of events. | |
459 | */ | |
460 | void drm_sysfs_hotplug_event(struct drm_device *dev) | |
461 | { | |
462 | char *event_string = "HOTPLUG=1"; | |
463 | char *envp[] = { event_string, NULL }; | |
464 | ||
465 | DRM_DEBUG("generating hotplug event\n"); | |
466 | ||
467 | kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, envp); | |
468 | } | |
5ca58282 | 469 | EXPORT_SYMBOL(drm_sysfs_hotplug_event); |
f453ba04 | 470 | |
1da177e4 LT |
471 | /** |
472 | * drm_sysfs_device_add - adds a class device to sysfs for a character driver | |
e8b962b6 JB |
473 | * @dev: DRM device to be added |
474 | * @head: DRM head in question | |
1da177e4 | 475 | * |
e8b962b6 JB |
476 | * Add a DRM device to the DRM's device model class. We use @dev's PCI device |
477 | * as the parent for the Linux device, and make sure it has a file containing | |
478 | * the driver we're using (for userspace compatibility). | |
1da177e4 | 479 | */ |
2c14f28b | 480 | int drm_sysfs_device_add(struct drm_minor *minor) |
1da177e4 | 481 | { |
e8b962b6 | 482 | int err; |
2c14f28b | 483 | char *minor_str; |
e8b962b6 | 484 | |
2c14f28b DA |
485 | minor->kdev.parent = &minor->dev->pdev->dev; |
486 | minor->kdev.class = drm_class; | |
487 | minor->kdev.release = drm_sysfs_device_release; | |
488 | minor->kdev.devt = minor->device; | |
08e4d534 | 489 | minor->kdev.type = &drm_sysfs_device_minor; |
f453ba04 DA |
490 | if (minor->type == DRM_MINOR_CONTROL) |
491 | minor_str = "controlD%d"; | |
492 | else if (minor->type == DRM_MINOR_RENDER) | |
493 | minor_str = "renderD%d"; | |
494 | else | |
495 | minor_str = "card%d"; | |
e8b962b6 | 496 | |
8f4bbd9f | 497 | dev_set_name(&minor->kdev, minor_str, minor->index); |
2c14f28b DA |
498 | |
499 | err = device_register(&minor->kdev); | |
e8b962b6 JB |
500 | if (err) { |
501 | DRM_ERROR("device add failed: %d\n", err); | |
24f73c92 JG |
502 | goto err_out; |
503 | } | |
1da177e4 | 504 | |
e8b962b6 | 505 | return 0; |
24f73c92 | 506 | |
24f73c92 | 507 | err_out: |
e8b962b6 | 508 | return err; |
1da177e4 LT |
509 | } |
510 | ||
511 | /** | |
e8b962b6 JB |
512 | * drm_sysfs_device_remove - remove DRM device |
513 | * @dev: DRM device to remove | |
1da177e4 LT |
514 | * |
515 | * This call unregisters and cleans up a class device that was created with a | |
516 | * call to drm_sysfs_device_add() | |
517 | */ | |
2c14f28b | 518 | void drm_sysfs_device_remove(struct drm_minor *minor) |
1da177e4 | 519 | { |
2c14f28b | 520 | device_unregister(&minor->kdev); |
1da177e4 | 521 | } |