Commit | Line | Data |
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52217195 DV |
1 | /* |
2 | * Copyright (c) 2016 Intel Corporation | |
3 | * | |
4 | * Permission to use, copy, modify, distribute, and sell this software and its | |
5 | * documentation for any purpose is hereby granted without fee, provided that | |
6 | * the above copyright notice appear in all copies and that both that copyright | |
7 | * notice and this permission notice appear in supporting documentation, and | |
8 | * that the name of the copyright holders not be used in advertising or | |
9 | * publicity pertaining to distribution of the software without specific, | |
10 | * written prior permission. The copyright holders make no representations | |
11 | * about the suitability of this software for any purpose. It is provided "as | |
12 | * is" without express or implied warranty. | |
13 | * | |
14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |
15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |
16 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |
17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |
18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |
19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |
20 | * OF THIS SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include <drm/drmP.h> | |
24 | #include <drm/drm_connector.h> | |
25 | #include <drm/drm_edid.h> | |
9338203c | 26 | #include <drm/drm_encoder.h> |
52217195 DV |
27 | |
28 | #include "drm_crtc_internal.h" | |
29 | #include "drm_internal.h" | |
30 | ||
ae2a6da8 DV |
31 | /** |
32 | * DOC: overview | |
33 | * | |
34 | * In DRM connectors are the general abstraction for display sinks, and include | |
35 | * als fixed panels or anything else that can display pixels in some form. As | |
36 | * opposed to all other KMS objects representing hardware (like CRTC, encoder or | |
37 | * plane abstractions) connectors can be hotplugged and unplugged at runtime. | |
ad093607 TR |
38 | * Hence they are reference-counted using drm_connector_get() and |
39 | * drm_connector_put(). | |
ae2a6da8 | 40 | * |
d574528a DV |
41 | * KMS driver must create, initialize, register and attach at a &struct |
42 | * drm_connector for each such sink. The instance is created as other KMS | |
aec97460 DV |
43 | * objects and initialized by setting the following fields. The connector is |
44 | * initialized with a call to drm_connector_init() with a pointer to the | |
45 | * &struct drm_connector_funcs and a connector type, and then exposed to | |
46 | * userspace with a call to drm_connector_register(). | |
ae2a6da8 DV |
47 | * |
48 | * Connectors must be attached to an encoder to be used. For devices that map | |
49 | * connectors to encoders 1:1, the connector should be attached at | |
50 | * initialization time with a call to drm_mode_connector_attach_encoder(). The | |
d574528a | 51 | * driver must also set the &drm_connector.encoder field to point to the |
ae2a6da8 DV |
52 | * attached encoder. |
53 | * | |
54 | * For connectors which are not fixed (like built-in panels) the driver needs to | |
55 | * support hotplug notifications. The simplest way to do that is by using the | |
56 | * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have | |
57 | * hardware support for hotplug interrupts. Connectors with hardware hotplug | |
58 | * support can instead use e.g. drm_helper_hpd_irq_event(). | |
59 | */ | |
60 | ||
52217195 DV |
61 | struct drm_conn_prop_enum_list { |
62 | int type; | |
63 | const char *name; | |
64 | struct ida ida; | |
65 | }; | |
66 | ||
67 | /* | |
68 | * Connector and encoder types. | |
69 | */ | |
70 | static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { | |
71 | { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, | |
72 | { DRM_MODE_CONNECTOR_VGA, "VGA" }, | |
73 | { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, | |
74 | { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, | |
75 | { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, | |
76 | { DRM_MODE_CONNECTOR_Composite, "Composite" }, | |
77 | { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, | |
78 | { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, | |
79 | { DRM_MODE_CONNECTOR_Component, "Component" }, | |
80 | { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, | |
81 | { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, | |
82 | { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, | |
83 | { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, | |
84 | { DRM_MODE_CONNECTOR_TV, "TV" }, | |
85 | { DRM_MODE_CONNECTOR_eDP, "eDP" }, | |
86 | { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, | |
87 | { DRM_MODE_CONNECTOR_DSI, "DSI" }, | |
88 | { DRM_MODE_CONNECTOR_DPI, "DPI" }, | |
89 | }; | |
90 | ||
91 | void drm_connector_ida_init(void) | |
92 | { | |
93 | int i; | |
94 | ||
95 | for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) | |
96 | ida_init(&drm_connector_enum_list[i].ida); | |
97 | } | |
98 | ||
99 | void drm_connector_ida_destroy(void) | |
100 | { | |
101 | int i; | |
102 | ||
103 | for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) | |
104 | ida_destroy(&drm_connector_enum_list[i].ida); | |
105 | } | |
106 | ||
107 | /** | |
108 | * drm_connector_get_cmdline_mode - reads the user's cmdline mode | |
109 | * @connector: connector to quwery | |
110 | * | |
ae2a6da8 | 111 | * The kernel supports per-connector configuration of its consoles through |
52217195 DV |
112 | * use of the video= parameter. This function parses that option and |
113 | * extracts the user's specified mode (or enable/disable status) for a | |
114 | * particular connector. This is typically only used during the early fbdev | |
115 | * setup. | |
116 | */ | |
117 | static void drm_connector_get_cmdline_mode(struct drm_connector *connector) | |
118 | { | |
119 | struct drm_cmdline_mode *mode = &connector->cmdline_mode; | |
120 | char *option = NULL; | |
121 | ||
122 | if (fb_get_options(connector->name, &option)) | |
123 | return; | |
124 | ||
125 | if (!drm_mode_parse_command_line_for_connector(option, | |
126 | connector, | |
127 | mode)) | |
128 | return; | |
129 | ||
130 | if (mode->force) { | |
6140cf20 JN |
131 | DRM_INFO("forcing %s connector %s\n", connector->name, |
132 | drm_get_connector_force_name(mode->force)); | |
52217195 DV |
133 | connector->force = mode->force; |
134 | } | |
135 | ||
136 | DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", | |
137 | connector->name, | |
138 | mode->xres, mode->yres, | |
139 | mode->refresh_specified ? mode->refresh : 60, | |
140 | mode->rb ? " reduced blanking" : "", | |
141 | mode->margins ? " with margins" : "", | |
142 | mode->interlace ? " interlaced" : ""); | |
143 | } | |
144 | ||
145 | static void drm_connector_free(struct kref *kref) | |
146 | { | |
147 | struct drm_connector *connector = | |
148 | container_of(kref, struct drm_connector, base.refcount); | |
149 | struct drm_device *dev = connector->dev; | |
150 | ||
151 | drm_mode_object_unregister(dev, &connector->base); | |
152 | connector->funcs->destroy(connector); | |
153 | } | |
154 | ||
ea497bb9 | 155 | void drm_connector_free_work_fn(struct work_struct *work) |
a703c550 | 156 | { |
ea497bb9 DV |
157 | struct drm_connector *connector, *n; |
158 | struct drm_device *dev = | |
159 | container_of(work, struct drm_device, mode_config.connector_free_work); | |
160 | struct drm_mode_config *config = &dev->mode_config; | |
161 | unsigned long flags; | |
162 | struct llist_node *freed; | |
a703c550 | 163 | |
ea497bb9 DV |
164 | spin_lock_irqsave(&config->connector_list_lock, flags); |
165 | freed = llist_del_all(&config->connector_free_list); | |
166 | spin_unlock_irqrestore(&config->connector_list_lock, flags); | |
167 | ||
168 | llist_for_each_entry_safe(connector, n, freed, free_node) { | |
169 | drm_mode_object_unregister(dev, &connector->base); | |
170 | connector->funcs->destroy(connector); | |
171 | } | |
a703c550 DV |
172 | } |
173 | ||
52217195 DV |
174 | /** |
175 | * drm_connector_init - Init a preallocated connector | |
176 | * @dev: DRM device | |
177 | * @connector: the connector to init | |
178 | * @funcs: callbacks for this connector | |
179 | * @connector_type: user visible type of the connector | |
180 | * | |
181 | * Initialises a preallocated connector. Connectors should be | |
182 | * subclassed as part of driver connector objects. | |
183 | * | |
184 | * Returns: | |
185 | * Zero on success, error code on failure. | |
186 | */ | |
187 | int drm_connector_init(struct drm_device *dev, | |
188 | struct drm_connector *connector, | |
189 | const struct drm_connector_funcs *funcs, | |
190 | int connector_type) | |
191 | { | |
192 | struct drm_mode_config *config = &dev->mode_config; | |
193 | int ret; | |
194 | struct ida *connector_ida = | |
195 | &drm_connector_enum_list[connector_type].ida; | |
196 | ||
2135ea7a TR |
197 | ret = __drm_mode_object_add(dev, &connector->base, |
198 | DRM_MODE_OBJECT_CONNECTOR, | |
199 | false, drm_connector_free); | |
52217195 | 200 | if (ret) |
613051da | 201 | return ret; |
52217195 DV |
202 | |
203 | connector->base.properties = &connector->properties; | |
204 | connector->dev = dev; | |
205 | connector->funcs = funcs; | |
206 | ||
207 | ret = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL); | |
208 | if (ret < 0) | |
209 | goto out_put; | |
210 | connector->index = ret; | |
211 | ret = 0; | |
212 | ||
213 | connector->connector_type = connector_type; | |
214 | connector->connector_type_id = | |
215 | ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); | |
216 | if (connector->connector_type_id < 0) { | |
217 | ret = connector->connector_type_id; | |
218 | goto out_put_id; | |
219 | } | |
220 | connector->name = | |
221 | kasprintf(GFP_KERNEL, "%s-%d", | |
222 | drm_connector_enum_list[connector_type].name, | |
223 | connector->connector_type_id); | |
224 | if (!connector->name) { | |
225 | ret = -ENOMEM; | |
226 | goto out_put_type_id; | |
227 | } | |
228 | ||
229 | INIT_LIST_HEAD(&connector->probed_modes); | |
230 | INIT_LIST_HEAD(&connector->modes); | |
e73ab00e | 231 | mutex_init(&connector->mutex); |
52217195 DV |
232 | connector->edid_blob_ptr = NULL; |
233 | connector->status = connector_status_unknown; | |
234 | ||
235 | drm_connector_get_cmdline_mode(connector); | |
236 | ||
237 | /* We should add connectors at the end to avoid upsetting the connector | |
238 | * index too much. */ | |
613051da | 239 | spin_lock_irq(&config->connector_list_lock); |
52217195 DV |
240 | list_add_tail(&connector->head, &config->connector_list); |
241 | config->num_connector++; | |
613051da | 242 | spin_unlock_irq(&config->connector_list_lock); |
52217195 DV |
243 | |
244 | if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) | |
245 | drm_object_attach_property(&connector->base, | |
246 | config->edid_property, | |
247 | 0); | |
248 | ||
249 | drm_object_attach_property(&connector->base, | |
250 | config->dpms_property, 0); | |
251 | ||
40ee6fbe MN |
252 | drm_object_attach_property(&connector->base, |
253 | config->link_status_property, | |
254 | 0); | |
255 | ||
66660d4c DA |
256 | drm_object_attach_property(&connector->base, |
257 | config->non_desktop_property, | |
258 | 0); | |
259 | ||
52217195 DV |
260 | if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { |
261 | drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); | |
262 | } | |
263 | ||
264 | connector->debugfs_entry = NULL; | |
265 | out_put_type_id: | |
266 | if (ret) | |
587680c1 | 267 | ida_simple_remove(connector_ida, connector->connector_type_id); |
52217195 DV |
268 | out_put_id: |
269 | if (ret) | |
587680c1 | 270 | ida_simple_remove(&config->connector_ida, connector->index); |
52217195 DV |
271 | out_put: |
272 | if (ret) | |
273 | drm_mode_object_unregister(dev, &connector->base); | |
274 | ||
52217195 DV |
275 | return ret; |
276 | } | |
277 | EXPORT_SYMBOL(drm_connector_init); | |
278 | ||
279 | /** | |
280 | * drm_mode_connector_attach_encoder - attach a connector to an encoder | |
281 | * @connector: connector to attach | |
282 | * @encoder: encoder to attach @connector to | |
283 | * | |
284 | * This function links up a connector to an encoder. Note that the routing | |
285 | * restrictions between encoders and crtcs are exposed to userspace through the | |
286 | * possible_clones and possible_crtcs bitmasks. | |
287 | * | |
288 | * Returns: | |
289 | * Zero on success, negative errno on failure. | |
290 | */ | |
291 | int drm_mode_connector_attach_encoder(struct drm_connector *connector, | |
292 | struct drm_encoder *encoder) | |
293 | { | |
294 | int i; | |
295 | ||
296 | /* | |
297 | * In the past, drivers have attempted to model the static association | |
298 | * of connector to encoder in simple connector/encoder devices using a | |
299 | * direct assignment of connector->encoder = encoder. This connection | |
300 | * is a logical one and the responsibility of the core, so drivers are | |
301 | * expected not to mess with this. | |
302 | * | |
303 | * Note that the error return should've been enough here, but a large | |
304 | * majority of drivers ignores the return value, so add in a big WARN | |
305 | * to get people's attention. | |
306 | */ | |
307 | if (WARN_ON(connector->encoder)) | |
308 | return -EINVAL; | |
309 | ||
310 | for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { | |
311 | if (connector->encoder_ids[i] == 0) { | |
312 | connector->encoder_ids[i] = encoder->base.id; | |
313 | return 0; | |
314 | } | |
315 | } | |
316 | return -ENOMEM; | |
317 | } | |
318 | EXPORT_SYMBOL(drm_mode_connector_attach_encoder); | |
319 | ||
320 | static void drm_mode_remove(struct drm_connector *connector, | |
321 | struct drm_display_mode *mode) | |
322 | { | |
323 | list_del(&mode->head); | |
324 | drm_mode_destroy(connector->dev, mode); | |
325 | } | |
326 | ||
327 | /** | |
328 | * drm_connector_cleanup - cleans up an initialised connector | |
329 | * @connector: connector to cleanup | |
330 | * | |
331 | * Cleans up the connector but doesn't free the object. | |
332 | */ | |
333 | void drm_connector_cleanup(struct drm_connector *connector) | |
334 | { | |
335 | struct drm_device *dev = connector->dev; | |
336 | struct drm_display_mode *mode, *t; | |
337 | ||
338 | /* The connector should have been removed from userspace long before | |
339 | * it is finally destroyed. | |
340 | */ | |
341 | if (WARN_ON(connector->registered)) | |
342 | drm_connector_unregister(connector); | |
343 | ||
344 | if (connector->tile_group) { | |
345 | drm_mode_put_tile_group(dev, connector->tile_group); | |
346 | connector->tile_group = NULL; | |
347 | } | |
348 | ||
349 | list_for_each_entry_safe(mode, t, &connector->probed_modes, head) | |
350 | drm_mode_remove(connector, mode); | |
351 | ||
352 | list_for_each_entry_safe(mode, t, &connector->modes, head) | |
353 | drm_mode_remove(connector, mode); | |
354 | ||
9a47dba1 CJ |
355 | ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida, |
356 | connector->connector_type_id); | |
52217195 | 357 | |
9a47dba1 CJ |
358 | ida_simple_remove(&dev->mode_config.connector_ida, |
359 | connector->index); | |
52217195 DV |
360 | |
361 | kfree(connector->display_info.bus_formats); | |
362 | drm_mode_object_unregister(dev, &connector->base); | |
363 | kfree(connector->name); | |
364 | connector->name = NULL; | |
613051da | 365 | spin_lock_irq(&dev->mode_config.connector_list_lock); |
52217195 DV |
366 | list_del(&connector->head); |
367 | dev->mode_config.num_connector--; | |
613051da | 368 | spin_unlock_irq(&dev->mode_config.connector_list_lock); |
52217195 DV |
369 | |
370 | WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); | |
371 | if (connector->state && connector->funcs->atomic_destroy_state) | |
372 | connector->funcs->atomic_destroy_state(connector, | |
373 | connector->state); | |
374 | ||
e73ab00e DV |
375 | mutex_destroy(&connector->mutex); |
376 | ||
52217195 DV |
377 | memset(connector, 0, sizeof(*connector)); |
378 | } | |
379 | EXPORT_SYMBOL(drm_connector_cleanup); | |
380 | ||
381 | /** | |
382 | * drm_connector_register - register a connector | |
383 | * @connector: the connector to register | |
384 | * | |
385 | * Register userspace interfaces for a connector | |
386 | * | |
387 | * Returns: | |
388 | * Zero on success, error code on failure. | |
389 | */ | |
390 | int drm_connector_register(struct drm_connector *connector) | |
391 | { | |
e73ab00e | 392 | int ret = 0; |
52217195 | 393 | |
e6e7b48b DV |
394 | if (!connector->dev->registered) |
395 | return 0; | |
396 | ||
e73ab00e | 397 | mutex_lock(&connector->mutex); |
52217195 | 398 | if (connector->registered) |
e73ab00e | 399 | goto unlock; |
52217195 DV |
400 | |
401 | ret = drm_sysfs_connector_add(connector); | |
402 | if (ret) | |
e73ab00e | 403 | goto unlock; |
52217195 DV |
404 | |
405 | ret = drm_debugfs_connector_add(connector); | |
406 | if (ret) { | |
407 | goto err_sysfs; | |
408 | } | |
409 | ||
410 | if (connector->funcs->late_register) { | |
411 | ret = connector->funcs->late_register(connector); | |
412 | if (ret) | |
413 | goto err_debugfs; | |
414 | } | |
415 | ||
416 | drm_mode_object_register(connector->dev, &connector->base); | |
417 | ||
418 | connector->registered = true; | |
e73ab00e | 419 | goto unlock; |
52217195 DV |
420 | |
421 | err_debugfs: | |
422 | drm_debugfs_connector_remove(connector); | |
423 | err_sysfs: | |
424 | drm_sysfs_connector_remove(connector); | |
e73ab00e DV |
425 | unlock: |
426 | mutex_unlock(&connector->mutex); | |
52217195 DV |
427 | return ret; |
428 | } | |
429 | EXPORT_SYMBOL(drm_connector_register); | |
430 | ||
431 | /** | |
432 | * drm_connector_unregister - unregister a connector | |
433 | * @connector: the connector to unregister | |
434 | * | |
435 | * Unregister userspace interfaces for a connector | |
436 | */ | |
437 | void drm_connector_unregister(struct drm_connector *connector) | |
438 | { | |
e73ab00e DV |
439 | mutex_lock(&connector->mutex); |
440 | if (!connector->registered) { | |
441 | mutex_unlock(&connector->mutex); | |
52217195 | 442 | return; |
e73ab00e | 443 | } |
52217195 DV |
444 | |
445 | if (connector->funcs->early_unregister) | |
446 | connector->funcs->early_unregister(connector); | |
447 | ||
448 | drm_sysfs_connector_remove(connector); | |
449 | drm_debugfs_connector_remove(connector); | |
450 | ||
451 | connector->registered = false; | |
e73ab00e | 452 | mutex_unlock(&connector->mutex); |
52217195 DV |
453 | } |
454 | EXPORT_SYMBOL(drm_connector_unregister); | |
455 | ||
456 | void drm_connector_unregister_all(struct drm_device *dev) | |
457 | { | |
458 | struct drm_connector *connector; | |
613051da | 459 | struct drm_connector_list_iter conn_iter; |
52217195 | 460 | |
b982dab1 | 461 | drm_connector_list_iter_begin(dev, &conn_iter); |
613051da | 462 | drm_for_each_connector_iter(connector, &conn_iter) |
52217195 | 463 | drm_connector_unregister(connector); |
b982dab1 | 464 | drm_connector_list_iter_end(&conn_iter); |
52217195 DV |
465 | } |
466 | ||
467 | int drm_connector_register_all(struct drm_device *dev) | |
468 | { | |
469 | struct drm_connector *connector; | |
613051da DV |
470 | struct drm_connector_list_iter conn_iter; |
471 | int ret = 0; | |
52217195 | 472 | |
b982dab1 | 473 | drm_connector_list_iter_begin(dev, &conn_iter); |
613051da | 474 | drm_for_each_connector_iter(connector, &conn_iter) { |
52217195 DV |
475 | ret = drm_connector_register(connector); |
476 | if (ret) | |
613051da | 477 | break; |
52217195 | 478 | } |
b982dab1 | 479 | drm_connector_list_iter_end(&conn_iter); |
52217195 | 480 | |
613051da DV |
481 | if (ret) |
482 | drm_connector_unregister_all(dev); | |
52217195 DV |
483 | return ret; |
484 | } | |
485 | ||
486 | /** | |
487 | * drm_get_connector_status_name - return a string for connector status | |
488 | * @status: connector status to compute name of | |
489 | * | |
490 | * In contrast to the other drm_get_*_name functions this one here returns a | |
491 | * const pointer and hence is threadsafe. | |
492 | */ | |
493 | const char *drm_get_connector_status_name(enum drm_connector_status status) | |
494 | { | |
495 | if (status == connector_status_connected) | |
496 | return "connected"; | |
497 | else if (status == connector_status_disconnected) | |
498 | return "disconnected"; | |
499 | else | |
500 | return "unknown"; | |
501 | } | |
502 | EXPORT_SYMBOL(drm_get_connector_status_name); | |
503 | ||
6140cf20 JN |
504 | /** |
505 | * drm_get_connector_force_name - return a string for connector force | |
506 | * @force: connector force to get name of | |
507 | * | |
508 | * Returns: const pointer to name. | |
509 | */ | |
510 | const char *drm_get_connector_force_name(enum drm_connector_force force) | |
511 | { | |
512 | switch (force) { | |
513 | case DRM_FORCE_UNSPECIFIED: | |
514 | return "unspecified"; | |
515 | case DRM_FORCE_OFF: | |
516 | return "off"; | |
517 | case DRM_FORCE_ON: | |
518 | return "on"; | |
519 | case DRM_FORCE_ON_DIGITAL: | |
520 | return "digital"; | |
521 | default: | |
522 | return "unknown"; | |
523 | } | |
524 | } | |
525 | ||
613051da DV |
526 | #ifdef CONFIG_LOCKDEP |
527 | static struct lockdep_map connector_list_iter_dep_map = { | |
528 | .name = "drm_connector_list_iter" | |
529 | }; | |
530 | #endif | |
531 | ||
532 | /** | |
b982dab1 | 533 | * drm_connector_list_iter_begin - initialize a connector_list iterator |
613051da DV |
534 | * @dev: DRM device |
535 | * @iter: connector_list iterator | |
536 | * | |
d574528a | 537 | * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter |
b982dab1 | 538 | * must always be cleaned up again by calling drm_connector_list_iter_end(). |
613051da DV |
539 | * Iteration itself happens using drm_connector_list_iter_next() or |
540 | * drm_for_each_connector_iter(). | |
541 | */ | |
b982dab1 TR |
542 | void drm_connector_list_iter_begin(struct drm_device *dev, |
543 | struct drm_connector_list_iter *iter) | |
613051da DV |
544 | { |
545 | iter->dev = dev; | |
546 | iter->conn = NULL; | |
547 | lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_); | |
548 | } | |
b982dab1 | 549 | EXPORT_SYMBOL(drm_connector_list_iter_begin); |
613051da | 550 | |
a703c550 DV |
551 | /* |
552 | * Extra-safe connector put function that works in any context. Should only be | |
553 | * used from the connector_iter functions, where we never really expect to | |
554 | * actually release the connector when dropping our final reference. | |
555 | */ | |
556 | static void | |
ea497bb9 | 557 | __drm_connector_put_safe(struct drm_connector *conn) |
a703c550 | 558 | { |
ea497bb9 DV |
559 | struct drm_mode_config *config = &conn->dev->mode_config; |
560 | ||
561 | lockdep_assert_held(&config->connector_list_lock); | |
562 | ||
563 | if (!refcount_dec_and_test(&conn->base.refcount.refcount)) | |
564 | return; | |
565 | ||
566 | llist_add(&conn->free_node, &config->connector_free_list); | |
567 | schedule_work(&config->connector_free_work); | |
a703c550 DV |
568 | } |
569 | ||
613051da DV |
570 | /** |
571 | * drm_connector_list_iter_next - return next connector | |
572 | * @iter: connectr_list iterator | |
573 | * | |
574 | * Returns the next connector for @iter, or NULL when the list walk has | |
575 | * completed. | |
576 | */ | |
577 | struct drm_connector * | |
578 | drm_connector_list_iter_next(struct drm_connector_list_iter *iter) | |
579 | { | |
580 | struct drm_connector *old_conn = iter->conn; | |
581 | struct drm_mode_config *config = &iter->dev->mode_config; | |
582 | struct list_head *lhead; | |
583 | unsigned long flags; | |
584 | ||
585 | spin_lock_irqsave(&config->connector_list_lock, flags); | |
586 | lhead = old_conn ? &old_conn->head : &config->connector_list; | |
587 | ||
588 | do { | |
589 | if (lhead->next == &config->connector_list) { | |
590 | iter->conn = NULL; | |
591 | break; | |
592 | } | |
593 | ||
594 | lhead = lhead->next; | |
595 | iter->conn = list_entry(lhead, struct drm_connector, head); | |
596 | ||
597 | /* loop until it's not a zombie connector */ | |
598 | } while (!kref_get_unless_zero(&iter->conn->base.refcount)); | |
613051da DV |
599 | |
600 | if (old_conn) | |
ea497bb9 DV |
601 | __drm_connector_put_safe(old_conn); |
602 | spin_unlock_irqrestore(&config->connector_list_lock, flags); | |
613051da DV |
603 | |
604 | return iter->conn; | |
605 | } | |
606 | EXPORT_SYMBOL(drm_connector_list_iter_next); | |
607 | ||
608 | /** | |
b982dab1 | 609 | * drm_connector_list_iter_end - tear down a connector_list iterator |
613051da DV |
610 | * @iter: connector_list iterator |
611 | * | |
612 | * Tears down @iter and releases any resources (like &drm_connector references) | |
613 | * acquired while walking the list. This must always be called, both when the | |
614 | * iteration completes fully or when it was aborted without walking the entire | |
615 | * list. | |
616 | */ | |
b982dab1 | 617 | void drm_connector_list_iter_end(struct drm_connector_list_iter *iter) |
613051da | 618 | { |
ea497bb9 DV |
619 | struct drm_mode_config *config = &iter->dev->mode_config; |
620 | unsigned long flags; | |
621 | ||
613051da | 622 | iter->dev = NULL; |
ea497bb9 DV |
623 | if (iter->conn) { |
624 | spin_lock_irqsave(&config->connector_list_lock, flags); | |
625 | __drm_connector_put_safe(iter->conn); | |
626 | spin_unlock_irqrestore(&config->connector_list_lock, flags); | |
627 | } | |
613051da DV |
628 | lock_release(&connector_list_iter_dep_map, 0, _RET_IP_); |
629 | } | |
b982dab1 | 630 | EXPORT_SYMBOL(drm_connector_list_iter_end); |
613051da | 631 | |
52217195 DV |
632 | static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { |
633 | { SubPixelUnknown, "Unknown" }, | |
634 | { SubPixelHorizontalRGB, "Horizontal RGB" }, | |
635 | { SubPixelHorizontalBGR, "Horizontal BGR" }, | |
636 | { SubPixelVerticalRGB, "Vertical RGB" }, | |
637 | { SubPixelVerticalBGR, "Vertical BGR" }, | |
638 | { SubPixelNone, "None" }, | |
639 | }; | |
640 | ||
641 | /** | |
642 | * drm_get_subpixel_order_name - return a string for a given subpixel enum | |
643 | * @order: enum of subpixel_order | |
644 | * | |
645 | * Note you could abuse this and return something out of bounds, but that | |
646 | * would be a caller error. No unscrubbed user data should make it here. | |
647 | */ | |
648 | const char *drm_get_subpixel_order_name(enum subpixel_order order) | |
649 | { | |
650 | return drm_subpixel_enum_list[order].name; | |
651 | } | |
652 | EXPORT_SYMBOL(drm_get_subpixel_order_name); | |
653 | ||
654 | static const struct drm_prop_enum_list drm_dpms_enum_list[] = { | |
655 | { DRM_MODE_DPMS_ON, "On" }, | |
656 | { DRM_MODE_DPMS_STANDBY, "Standby" }, | |
657 | { DRM_MODE_DPMS_SUSPEND, "Suspend" }, | |
658 | { DRM_MODE_DPMS_OFF, "Off" } | |
659 | }; | |
660 | DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) | |
661 | ||
40ee6fbe MN |
662 | static const struct drm_prop_enum_list drm_link_status_enum_list[] = { |
663 | { DRM_MODE_LINK_STATUS_GOOD, "Good" }, | |
664 | { DRM_MODE_LINK_STATUS_BAD, "Bad" }, | |
665 | }; | |
40ee6fbe | 666 | |
b3c6c8bf DV |
667 | /** |
668 | * drm_display_info_set_bus_formats - set the supported bus formats | |
669 | * @info: display info to store bus formats in | |
670 | * @formats: array containing the supported bus formats | |
671 | * @num_formats: the number of entries in the fmts array | |
672 | * | |
673 | * Store the supported bus formats in display info structure. | |
674 | * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for | |
675 | * a full list of available formats. | |
676 | */ | |
677 | int drm_display_info_set_bus_formats(struct drm_display_info *info, | |
678 | const u32 *formats, | |
679 | unsigned int num_formats) | |
680 | { | |
681 | u32 *fmts = NULL; | |
682 | ||
683 | if (!formats && num_formats) | |
684 | return -EINVAL; | |
685 | ||
686 | if (formats && num_formats) { | |
687 | fmts = kmemdup(formats, sizeof(*formats) * num_formats, | |
688 | GFP_KERNEL); | |
689 | if (!fmts) | |
690 | return -ENOMEM; | |
691 | } | |
692 | ||
693 | kfree(info->bus_formats); | |
694 | info->bus_formats = fmts; | |
695 | info->num_bus_formats = num_formats; | |
696 | ||
697 | return 0; | |
698 | } | |
699 | EXPORT_SYMBOL(drm_display_info_set_bus_formats); | |
700 | ||
52217195 DV |
701 | /* Optional connector properties. */ |
702 | static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { | |
703 | { DRM_MODE_SCALE_NONE, "None" }, | |
704 | { DRM_MODE_SCALE_FULLSCREEN, "Full" }, | |
705 | { DRM_MODE_SCALE_CENTER, "Center" }, | |
706 | { DRM_MODE_SCALE_ASPECT, "Full aspect" }, | |
707 | }; | |
708 | ||
709 | static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { | |
710 | { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, | |
711 | { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, | |
712 | { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, | |
713 | }; | |
714 | ||
715 | static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { | |
716 | { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ | |
717 | { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ | |
718 | { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ | |
719 | }; | |
720 | DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) | |
721 | ||
722 | static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { | |
723 | { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ | |
724 | { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ | |
725 | { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ | |
726 | }; | |
727 | DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, | |
728 | drm_dvi_i_subconnector_enum_list) | |
729 | ||
730 | static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { | |
731 | { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ | |
732 | { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ | |
733 | { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ | |
734 | { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ | |
735 | { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ | |
736 | }; | |
737 | DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) | |
738 | ||
739 | static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { | |
740 | { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ | |
741 | { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ | |
742 | { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ | |
743 | { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ | |
744 | { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ | |
745 | }; | |
746 | DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, | |
747 | drm_tv_subconnector_enum_list) | |
748 | ||
4ada6f22 DV |
749 | /** |
750 | * DOC: standard connector properties | |
751 | * | |
752 | * DRM connectors have a few standardized properties: | |
753 | * | |
754 | * EDID: | |
755 | * Blob property which contains the current EDID read from the sink. This | |
756 | * is useful to parse sink identification information like vendor, model | |
757 | * and serial. Drivers should update this property by calling | |
758 | * drm_mode_connector_update_edid_property(), usually after having parsed | |
759 | * the EDID using drm_add_edid_modes(). Userspace cannot change this | |
760 | * property. | |
761 | * DPMS: | |
762 | * Legacy property for setting the power state of the connector. For atomic | |
763 | * drivers this is only provided for backwards compatibility with existing | |
764 | * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the | |
765 | * connector is linked to. Drivers should never set this property directly, | |
d574528a | 766 | * it is handled by the DRM core by calling the &drm_connector_funcs.dpms |
144a7999 DV |
767 | * callback. For atomic drivers the remapping to the "ACTIVE" property is |
768 | * implemented in the DRM core. This is the only standard connector | |
769 | * property that userspace can change. | |
d0d1aee5 DV |
770 | * |
771 | * Note that this property cannot be set through the MODE_ATOMIC ioctl, | |
772 | * userspace must use "ACTIVE" on the CRTC instead. | |
773 | * | |
774 | * WARNING: | |
775 | * | |
776 | * For userspace also running on legacy drivers the "DPMS" semantics are a | |
777 | * lot more complicated. First, userspace cannot rely on the "DPMS" value | |
778 | * returned by the GETCONNECTOR actually reflecting reality, because many | |
779 | * drivers fail to update it. For atomic drivers this is taken care of in | |
780 | * drm_atomic_helper_update_legacy_modeset_state(). | |
781 | * | |
782 | * The second issue is that the DPMS state is only well-defined when the | |
783 | * connector is connected to a CRTC. In atomic the DRM core enforces that | |
784 | * "ACTIVE" is off in such a case, no such checks exists for "DPMS". | |
785 | * | |
786 | * Finally, when enabling an output using the legacy SETCONFIG ioctl then | |
787 | * "DPMS" is forced to ON. But see above, that might not be reflected in | |
788 | * the software value on legacy drivers. | |
789 | * | |
790 | * Summarizing: Only set "DPMS" when the connector is known to be enabled, | |
791 | * assume that a successful SETCONFIG call also sets "DPMS" to on, and | |
792 | * never read back the value of "DPMS" because it can be incorrect. | |
4ada6f22 DV |
793 | * PATH: |
794 | * Connector path property to identify how this sink is physically | |
795 | * connected. Used by DP MST. This should be set by calling | |
796 | * drm_mode_connector_set_path_property(), in the case of DP MST with the | |
797 | * path property the MST manager created. Userspace cannot change this | |
798 | * property. | |
799 | * TILE: | |
800 | * Connector tile group property to indicate how a set of DRM connector | |
801 | * compose together into one logical screen. This is used by both high-res | |
802 | * external screens (often only using a single cable, but exposing multiple | |
803 | * DP MST sinks), or high-res integrated panels (like dual-link DSI) which | |
804 | * are not gen-locked. Note that for tiled panels which are genlocked, like | |
805 | * dual-link LVDS or dual-link DSI, the driver should try to not expose the | |
806 | * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers | |
807 | * should update this value using drm_mode_connector_set_tile_property(). | |
808 | * Userspace cannot change this property. | |
40ee6fbe MN |
809 | * link-status: |
810 | * Connector link-status property to indicate the status of link. The default | |
811 | * value of link-status is "GOOD". If something fails during or after modeset, | |
812 | * the kernel driver may set this to "BAD" and issue a hotplug uevent. Drivers | |
813 | * should update this value using drm_mode_connector_set_link_status_property(). | |
66660d4c DA |
814 | * non_desktop: |
815 | * Indicates the output should be ignored for purposes of displaying a | |
816 | * standard desktop environment or console. This is most likely because | |
817 | * the output device is not rectilinear. | |
4ada6f22 DV |
818 | * |
819 | * Connectors also have one standardized atomic property: | |
820 | * | |
821 | * CRTC_ID: | |
822 | * Mode object ID of the &drm_crtc this connector should be connected to. | |
823 | */ | |
824 | ||
52217195 DV |
825 | int drm_connector_create_standard_properties(struct drm_device *dev) |
826 | { | |
827 | struct drm_property *prop; | |
828 | ||
829 | prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | | |
830 | DRM_MODE_PROP_IMMUTABLE, | |
831 | "EDID", 0); | |
832 | if (!prop) | |
833 | return -ENOMEM; | |
834 | dev->mode_config.edid_property = prop; | |
835 | ||
836 | prop = drm_property_create_enum(dev, 0, | |
837 | "DPMS", drm_dpms_enum_list, | |
838 | ARRAY_SIZE(drm_dpms_enum_list)); | |
839 | if (!prop) | |
840 | return -ENOMEM; | |
841 | dev->mode_config.dpms_property = prop; | |
842 | ||
843 | prop = drm_property_create(dev, | |
844 | DRM_MODE_PROP_BLOB | | |
845 | DRM_MODE_PROP_IMMUTABLE, | |
846 | "PATH", 0); | |
847 | if (!prop) | |
848 | return -ENOMEM; | |
849 | dev->mode_config.path_property = prop; | |
850 | ||
851 | prop = drm_property_create(dev, | |
852 | DRM_MODE_PROP_BLOB | | |
853 | DRM_MODE_PROP_IMMUTABLE, | |
854 | "TILE", 0); | |
855 | if (!prop) | |
856 | return -ENOMEM; | |
857 | dev->mode_config.tile_property = prop; | |
858 | ||
40ee6fbe MN |
859 | prop = drm_property_create_enum(dev, 0, "link-status", |
860 | drm_link_status_enum_list, | |
861 | ARRAY_SIZE(drm_link_status_enum_list)); | |
862 | if (!prop) | |
863 | return -ENOMEM; | |
864 | dev->mode_config.link_status_property = prop; | |
865 | ||
66660d4c DA |
866 | prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop"); |
867 | if (!prop) | |
868 | return -ENOMEM; | |
869 | dev->mode_config.non_desktop_property = prop; | |
870 | ||
52217195 DV |
871 | return 0; |
872 | } | |
873 | ||
874 | /** | |
875 | * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties | |
876 | * @dev: DRM device | |
877 | * | |
878 | * Called by a driver the first time a DVI-I connector is made. | |
879 | */ | |
880 | int drm_mode_create_dvi_i_properties(struct drm_device *dev) | |
881 | { | |
882 | struct drm_property *dvi_i_selector; | |
883 | struct drm_property *dvi_i_subconnector; | |
884 | ||
885 | if (dev->mode_config.dvi_i_select_subconnector_property) | |
886 | return 0; | |
887 | ||
888 | dvi_i_selector = | |
889 | drm_property_create_enum(dev, 0, | |
890 | "select subconnector", | |
891 | drm_dvi_i_select_enum_list, | |
892 | ARRAY_SIZE(drm_dvi_i_select_enum_list)); | |
893 | dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; | |
894 | ||
895 | dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | |
896 | "subconnector", | |
897 | drm_dvi_i_subconnector_enum_list, | |
898 | ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); | |
899 | dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; | |
900 | ||
901 | return 0; | |
902 | } | |
903 | EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); | |
904 | ||
905 | /** | |
906 | * drm_create_tv_properties - create TV specific connector properties | |
907 | * @dev: DRM device | |
908 | * @num_modes: number of different TV formats (modes) supported | |
909 | * @modes: array of pointers to strings containing name of each format | |
910 | * | |
911 | * Called by a driver's TV initialization routine, this function creates | |
912 | * the TV specific connector properties for a given device. Caller is | |
913 | * responsible for allocating a list of format names and passing them to | |
914 | * this routine. | |
915 | */ | |
916 | int drm_mode_create_tv_properties(struct drm_device *dev, | |
917 | unsigned int num_modes, | |
918 | const char * const modes[]) | |
919 | { | |
920 | struct drm_property *tv_selector; | |
921 | struct drm_property *tv_subconnector; | |
922 | unsigned int i; | |
923 | ||
924 | if (dev->mode_config.tv_select_subconnector_property) | |
925 | return 0; | |
926 | ||
927 | /* | |
928 | * Basic connector properties | |
929 | */ | |
930 | tv_selector = drm_property_create_enum(dev, 0, | |
931 | "select subconnector", | |
932 | drm_tv_select_enum_list, | |
933 | ARRAY_SIZE(drm_tv_select_enum_list)); | |
934 | if (!tv_selector) | |
935 | goto nomem; | |
936 | ||
937 | dev->mode_config.tv_select_subconnector_property = tv_selector; | |
938 | ||
939 | tv_subconnector = | |
940 | drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | |
941 | "subconnector", | |
942 | drm_tv_subconnector_enum_list, | |
943 | ARRAY_SIZE(drm_tv_subconnector_enum_list)); | |
944 | if (!tv_subconnector) | |
945 | goto nomem; | |
946 | dev->mode_config.tv_subconnector_property = tv_subconnector; | |
947 | ||
948 | /* | |
949 | * Other, TV specific properties: margins & TV modes. | |
950 | */ | |
951 | dev->mode_config.tv_left_margin_property = | |
952 | drm_property_create_range(dev, 0, "left margin", 0, 100); | |
953 | if (!dev->mode_config.tv_left_margin_property) | |
954 | goto nomem; | |
955 | ||
956 | dev->mode_config.tv_right_margin_property = | |
957 | drm_property_create_range(dev, 0, "right margin", 0, 100); | |
958 | if (!dev->mode_config.tv_right_margin_property) | |
959 | goto nomem; | |
960 | ||
961 | dev->mode_config.tv_top_margin_property = | |
962 | drm_property_create_range(dev, 0, "top margin", 0, 100); | |
963 | if (!dev->mode_config.tv_top_margin_property) | |
964 | goto nomem; | |
965 | ||
966 | dev->mode_config.tv_bottom_margin_property = | |
967 | drm_property_create_range(dev, 0, "bottom margin", 0, 100); | |
968 | if (!dev->mode_config.tv_bottom_margin_property) | |
969 | goto nomem; | |
970 | ||
971 | dev->mode_config.tv_mode_property = | |
972 | drm_property_create(dev, DRM_MODE_PROP_ENUM, | |
973 | "mode", num_modes); | |
974 | if (!dev->mode_config.tv_mode_property) | |
975 | goto nomem; | |
976 | ||
977 | for (i = 0; i < num_modes; i++) | |
978 | drm_property_add_enum(dev->mode_config.tv_mode_property, i, | |
979 | i, modes[i]); | |
980 | ||
981 | dev->mode_config.tv_brightness_property = | |
982 | drm_property_create_range(dev, 0, "brightness", 0, 100); | |
983 | if (!dev->mode_config.tv_brightness_property) | |
984 | goto nomem; | |
985 | ||
986 | dev->mode_config.tv_contrast_property = | |
987 | drm_property_create_range(dev, 0, "contrast", 0, 100); | |
988 | if (!dev->mode_config.tv_contrast_property) | |
989 | goto nomem; | |
990 | ||
991 | dev->mode_config.tv_flicker_reduction_property = | |
992 | drm_property_create_range(dev, 0, "flicker reduction", 0, 100); | |
993 | if (!dev->mode_config.tv_flicker_reduction_property) | |
994 | goto nomem; | |
995 | ||
996 | dev->mode_config.tv_overscan_property = | |
997 | drm_property_create_range(dev, 0, "overscan", 0, 100); | |
998 | if (!dev->mode_config.tv_overscan_property) | |
999 | goto nomem; | |
1000 | ||
1001 | dev->mode_config.tv_saturation_property = | |
1002 | drm_property_create_range(dev, 0, "saturation", 0, 100); | |
1003 | if (!dev->mode_config.tv_saturation_property) | |
1004 | goto nomem; | |
1005 | ||
1006 | dev->mode_config.tv_hue_property = | |
1007 | drm_property_create_range(dev, 0, "hue", 0, 100); | |
1008 | if (!dev->mode_config.tv_hue_property) | |
1009 | goto nomem; | |
1010 | ||
1011 | return 0; | |
1012 | nomem: | |
1013 | return -ENOMEM; | |
1014 | } | |
1015 | EXPORT_SYMBOL(drm_mode_create_tv_properties); | |
1016 | ||
1017 | /** | |
1018 | * drm_mode_create_scaling_mode_property - create scaling mode property | |
1019 | * @dev: DRM device | |
1020 | * | |
1021 | * Called by a driver the first time it's needed, must be attached to desired | |
1022 | * connectors. | |
8f6e1e22 ML |
1023 | * |
1024 | * Atomic drivers should use drm_connector_attach_scaling_mode_property() | |
1025 | * instead to correctly assign &drm_connector_state.picture_aspect_ratio | |
1026 | * in the atomic state. | |
52217195 DV |
1027 | */ |
1028 | int drm_mode_create_scaling_mode_property(struct drm_device *dev) | |
1029 | { | |
1030 | struct drm_property *scaling_mode; | |
1031 | ||
1032 | if (dev->mode_config.scaling_mode_property) | |
1033 | return 0; | |
1034 | ||
1035 | scaling_mode = | |
1036 | drm_property_create_enum(dev, 0, "scaling mode", | |
1037 | drm_scaling_mode_enum_list, | |
1038 | ARRAY_SIZE(drm_scaling_mode_enum_list)); | |
1039 | ||
1040 | dev->mode_config.scaling_mode_property = scaling_mode; | |
1041 | ||
1042 | return 0; | |
1043 | } | |
1044 | EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); | |
1045 | ||
8f6e1e22 ML |
1046 | /** |
1047 | * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property | |
1048 | * @connector: connector to attach scaling mode property on. | |
1049 | * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*). | |
1050 | * | |
1051 | * This is used to add support for scaling mode to atomic drivers. | |
1052 | * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio | |
1053 | * and can be used from &drm_connector_helper_funcs->atomic_check for validation. | |
1054 | * | |
1055 | * This is the atomic version of drm_mode_create_scaling_mode_property(). | |
1056 | * | |
1057 | * Returns: | |
1058 | * Zero on success, negative errno on failure. | |
1059 | */ | |
1060 | int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, | |
1061 | u32 scaling_mode_mask) | |
1062 | { | |
1063 | struct drm_device *dev = connector->dev; | |
1064 | struct drm_property *scaling_mode_property; | |
1065 | int i, j = 0; | |
1066 | const unsigned valid_scaling_mode_mask = | |
1067 | (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1; | |
1068 | ||
1069 | if (WARN_ON(hweight32(scaling_mode_mask) < 2 || | |
1070 | scaling_mode_mask & ~valid_scaling_mode_mask)) | |
1071 | return -EINVAL; | |
1072 | ||
1073 | scaling_mode_property = | |
1074 | drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode", | |
1075 | hweight32(scaling_mode_mask)); | |
1076 | ||
1077 | if (!scaling_mode_property) | |
1078 | return -ENOMEM; | |
1079 | ||
1080 | for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) { | |
1081 | int ret; | |
1082 | ||
1083 | if (!(BIT(i) & scaling_mode_mask)) | |
1084 | continue; | |
1085 | ||
1086 | ret = drm_property_add_enum(scaling_mode_property, j++, | |
1087 | drm_scaling_mode_enum_list[i].type, | |
1088 | drm_scaling_mode_enum_list[i].name); | |
1089 | ||
1090 | if (ret) { | |
1091 | drm_property_destroy(dev, scaling_mode_property); | |
1092 | ||
1093 | return ret; | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | drm_object_attach_property(&connector->base, | |
1098 | scaling_mode_property, 0); | |
1099 | ||
1100 | connector->scaling_mode_property = scaling_mode_property; | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property); | |
1105 | ||
52217195 DV |
1106 | /** |
1107 | * drm_mode_create_aspect_ratio_property - create aspect ratio property | |
1108 | * @dev: DRM device | |
1109 | * | |
1110 | * Called by a driver the first time it's needed, must be attached to desired | |
1111 | * connectors. | |
1112 | * | |
1113 | * Returns: | |
1114 | * Zero on success, negative errno on failure. | |
1115 | */ | |
1116 | int drm_mode_create_aspect_ratio_property(struct drm_device *dev) | |
1117 | { | |
1118 | if (dev->mode_config.aspect_ratio_property) | |
1119 | return 0; | |
1120 | ||
1121 | dev->mode_config.aspect_ratio_property = | |
1122 | drm_property_create_enum(dev, 0, "aspect ratio", | |
1123 | drm_aspect_ratio_enum_list, | |
1124 | ARRAY_SIZE(drm_aspect_ratio_enum_list)); | |
1125 | ||
1126 | if (dev->mode_config.aspect_ratio_property == NULL) | |
1127 | return -ENOMEM; | |
1128 | ||
1129 | return 0; | |
1130 | } | |
1131 | EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); | |
1132 | ||
1133 | /** | |
1134 | * drm_mode_create_suggested_offset_properties - create suggests offset properties | |
1135 | * @dev: DRM device | |
1136 | * | |
1137 | * Create the the suggested x/y offset property for connectors. | |
1138 | */ | |
1139 | int drm_mode_create_suggested_offset_properties(struct drm_device *dev) | |
1140 | { | |
1141 | if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) | |
1142 | return 0; | |
1143 | ||
1144 | dev->mode_config.suggested_x_property = | |
1145 | drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); | |
1146 | ||
1147 | dev->mode_config.suggested_y_property = | |
1148 | drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); | |
1149 | ||
1150 | if (dev->mode_config.suggested_x_property == NULL || | |
1151 | dev->mode_config.suggested_y_property == NULL) | |
1152 | return -ENOMEM; | |
1153 | return 0; | |
1154 | } | |
1155 | EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); | |
1156 | ||
1157 | /** | |
1158 | * drm_mode_connector_set_path_property - set tile property on connector | |
1159 | * @connector: connector to set property on. | |
1160 | * @path: path to use for property; must not be NULL. | |
1161 | * | |
1162 | * This creates a property to expose to userspace to specify a | |
1163 | * connector path. This is mainly used for DisplayPort MST where | |
1164 | * connectors have a topology and we want to allow userspace to give | |
1165 | * them more meaningful names. | |
1166 | * | |
1167 | * Returns: | |
1168 | * Zero on success, negative errno on failure. | |
1169 | */ | |
1170 | int drm_mode_connector_set_path_property(struct drm_connector *connector, | |
1171 | const char *path) | |
1172 | { | |
1173 | struct drm_device *dev = connector->dev; | |
1174 | int ret; | |
1175 | ||
1176 | ret = drm_property_replace_global_blob(dev, | |
1177 | &connector->path_blob_ptr, | |
1178 | strlen(path) + 1, | |
1179 | path, | |
1180 | &connector->base, | |
1181 | dev->mode_config.path_property); | |
1182 | return ret; | |
1183 | } | |
1184 | EXPORT_SYMBOL(drm_mode_connector_set_path_property); | |
1185 | ||
1186 | /** | |
1187 | * drm_mode_connector_set_tile_property - set tile property on connector | |
1188 | * @connector: connector to set property on. | |
1189 | * | |
1190 | * This looks up the tile information for a connector, and creates a | |
1191 | * property for userspace to parse if it exists. The property is of | |
1192 | * the form of 8 integers using ':' as a separator. | |
1193 | * | |
1194 | * Returns: | |
1195 | * Zero on success, errno on failure. | |
1196 | */ | |
1197 | int drm_mode_connector_set_tile_property(struct drm_connector *connector) | |
1198 | { | |
1199 | struct drm_device *dev = connector->dev; | |
1200 | char tile[256]; | |
1201 | int ret; | |
1202 | ||
1203 | if (!connector->has_tile) { | |
1204 | ret = drm_property_replace_global_blob(dev, | |
1205 | &connector->tile_blob_ptr, | |
1206 | 0, | |
1207 | NULL, | |
1208 | &connector->base, | |
1209 | dev->mode_config.tile_property); | |
1210 | return ret; | |
1211 | } | |
1212 | ||
1213 | snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", | |
1214 | connector->tile_group->id, connector->tile_is_single_monitor, | |
1215 | connector->num_h_tile, connector->num_v_tile, | |
1216 | connector->tile_h_loc, connector->tile_v_loc, | |
1217 | connector->tile_h_size, connector->tile_v_size); | |
1218 | ||
1219 | ret = drm_property_replace_global_blob(dev, | |
1220 | &connector->tile_blob_ptr, | |
1221 | strlen(tile) + 1, | |
1222 | tile, | |
1223 | &connector->base, | |
1224 | dev->mode_config.tile_property); | |
1225 | return ret; | |
1226 | } | |
1227 | EXPORT_SYMBOL(drm_mode_connector_set_tile_property); | |
1228 | ||
1229 | /** | |
1230 | * drm_mode_connector_update_edid_property - update the edid property of a connector | |
1231 | * @connector: drm connector | |
1232 | * @edid: new value of the edid property | |
1233 | * | |
1234 | * This function creates a new blob modeset object and assigns its id to the | |
1235 | * connector's edid property. | |
1236 | * | |
1237 | * Returns: | |
1238 | * Zero on success, negative errno on failure. | |
1239 | */ | |
1240 | int drm_mode_connector_update_edid_property(struct drm_connector *connector, | |
1241 | const struct edid *edid) | |
1242 | { | |
1243 | struct drm_device *dev = connector->dev; | |
1244 | size_t size = 0; | |
1245 | int ret; | |
1246 | ||
1247 | /* ignore requests to set edid when overridden */ | |
1248 | if (connector->override_edid) | |
1249 | return 0; | |
1250 | ||
1251 | if (edid) | |
1252 | size = EDID_LENGTH * (1 + edid->extensions); | |
1253 | ||
4b4df570 KP |
1254 | /* Set the display info, using edid if available, otherwise |
1255 | * reseting the values to defaults. This duplicates the work | |
1256 | * done in drm_add_edid_modes, but that function is not | |
1257 | * consistently called before this one in all drivers and the | |
1258 | * computation is cheap enough that it seems better to | |
1259 | * duplicate it rather than attempt to ensure some arbitrary | |
1260 | * ordering of calls. | |
1261 | */ | |
1262 | if (edid) | |
1263 | drm_add_display_info(connector, edid); | |
1264 | else | |
1265 | drm_reset_display_info(connector); | |
1266 | ||
66660d4c DA |
1267 | drm_object_property_set_value(&connector->base, |
1268 | dev->mode_config.non_desktop_property, | |
1269 | connector->display_info.non_desktop); | |
1270 | ||
52217195 DV |
1271 | ret = drm_property_replace_global_blob(dev, |
1272 | &connector->edid_blob_ptr, | |
1273 | size, | |
1274 | edid, | |
1275 | &connector->base, | |
1276 | dev->mode_config.edid_property); | |
1277 | return ret; | |
1278 | } | |
1279 | EXPORT_SYMBOL(drm_mode_connector_update_edid_property); | |
1280 | ||
40ee6fbe MN |
1281 | /** |
1282 | * drm_mode_connector_set_link_status_property - Set link status property of a connector | |
1283 | * @connector: drm connector | |
1284 | * @link_status: new value of link status property (0: Good, 1: Bad) | |
1285 | * | |
1286 | * In usual working scenario, this link status property will always be set to | |
1287 | * "GOOD". If something fails during or after a mode set, the kernel driver | |
1288 | * may set this link status property to "BAD". The caller then needs to send a | |
1289 | * hotplug uevent for userspace to re-check the valid modes through | |
1290 | * GET_CONNECTOR_IOCTL and retry modeset. | |
1291 | * | |
1292 | * Note: Drivers cannot rely on userspace to support this property and | |
1293 | * issue a modeset. As such, they may choose to handle issues (like | |
1294 | * re-training a link) without userspace's intervention. | |
1295 | * | |
1296 | * The reason for adding this property is to handle link training failures, but | |
1297 | * it is not limited to DP or link training. For example, if we implement | |
1298 | * asynchronous setcrtc, this property can be used to report any failures in that. | |
1299 | */ | |
1300 | void drm_mode_connector_set_link_status_property(struct drm_connector *connector, | |
1301 | uint64_t link_status) | |
1302 | { | |
1303 | struct drm_device *dev = connector->dev; | |
1304 | ||
1305 | drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); | |
1306 | connector->state->link_status = link_status; | |
1307 | drm_modeset_unlock(&dev->mode_config.connection_mutex); | |
1308 | } | |
1309 | EXPORT_SYMBOL(drm_mode_connector_set_link_status_property); | |
1310 | ||
52217195 DV |
1311 | int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, |
1312 | struct drm_property *property, | |
1313 | uint64_t value) | |
1314 | { | |
1315 | int ret = -EINVAL; | |
1316 | struct drm_connector *connector = obj_to_connector(obj); | |
1317 | ||
1318 | /* Do DPMS ourselves */ | |
1319 | if (property == connector->dev->mode_config.dpms_property) { | |
1320 | ret = (*connector->funcs->dpms)(connector, (int)value); | |
1321 | } else if (connector->funcs->set_property) | |
1322 | ret = connector->funcs->set_property(connector, property, value); | |
1323 | ||
144a7999 | 1324 | if (!ret) |
52217195 DV |
1325 | drm_object_property_set_value(&connector->base, property, value); |
1326 | return ret; | |
1327 | } | |
1328 | ||
1329 | int drm_mode_connector_property_set_ioctl(struct drm_device *dev, | |
1330 | void *data, struct drm_file *file_priv) | |
1331 | { | |
1332 | struct drm_mode_connector_set_property *conn_set_prop = data; | |
1333 | struct drm_mode_obj_set_property obj_set_prop = { | |
1334 | .value = conn_set_prop->value, | |
1335 | .prop_id = conn_set_prop->prop_id, | |
1336 | .obj_id = conn_set_prop->connector_id, | |
1337 | .obj_type = DRM_MODE_OBJECT_CONNECTOR | |
1338 | }; | |
1339 | ||
1340 | /* It does all the locking and checking we need */ | |
1341 | return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); | |
1342 | } | |
1343 | ||
1344 | static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) | |
1345 | { | |
1346 | /* For atomic drivers only state objects are synchronously updated and | |
1347 | * protected by modeset locks, so check those first. */ | |
1348 | if (connector->state) | |
1349 | return connector->state->best_encoder; | |
1350 | return connector->encoder; | |
1351 | } | |
1352 | ||
1353 | static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, | |
1354 | const struct drm_file *file_priv) | |
1355 | { | |
1356 | /* | |
1357 | * If user-space hasn't configured the driver to expose the stereo 3D | |
1358 | * modes, don't expose them. | |
1359 | */ | |
1360 | if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) | |
1361 | return false; | |
1362 | ||
1363 | return true; | |
1364 | } | |
1365 | ||
1366 | int drm_mode_getconnector(struct drm_device *dev, void *data, | |
1367 | struct drm_file *file_priv) | |
1368 | { | |
1369 | struct drm_mode_get_connector *out_resp = data; | |
1370 | struct drm_connector *connector; | |
1371 | struct drm_encoder *encoder; | |
1372 | struct drm_display_mode *mode; | |
1373 | int mode_count = 0; | |
1374 | int encoders_count = 0; | |
1375 | int ret = 0; | |
1376 | int copied = 0; | |
1377 | int i; | |
1378 | struct drm_mode_modeinfo u_mode; | |
1379 | struct drm_mode_modeinfo __user *mode_ptr; | |
1380 | uint32_t __user *encoder_ptr; | |
1381 | ||
1382 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
1383 | return -EINVAL; | |
1384 | ||
1385 | memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); | |
1386 | ||
418da172 | 1387 | connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id); |
91eefc05 DV |
1388 | if (!connector) |
1389 | return -ENOENT; | |
1390 | ||
52217195 DV |
1391 | for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) |
1392 | if (connector->encoder_ids[i] != 0) | |
1393 | encoders_count++; | |
1394 | ||
91eefc05 DV |
1395 | if ((out_resp->count_encoders >= encoders_count) && encoders_count) { |
1396 | copied = 0; | |
1397 | encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); | |
1398 | for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { | |
1399 | if (connector->encoder_ids[i] != 0) { | |
1400 | if (put_user(connector->encoder_ids[i], | |
1401 | encoder_ptr + copied)) { | |
1402 | ret = -EFAULT; | |
e94ac351 | 1403 | goto out; |
91eefc05 DV |
1404 | } |
1405 | copied++; | |
1406 | } | |
1407 | } | |
1408 | } | |
1409 | out_resp->count_encoders = encoders_count; | |
1410 | ||
1411 | out_resp->connector_id = connector->base.id; | |
1412 | out_resp->connector_type = connector->connector_type; | |
1413 | out_resp->connector_type_id = connector->connector_type_id; | |
1414 | ||
1415 | mutex_lock(&dev->mode_config.mutex); | |
52217195 DV |
1416 | if (out_resp->count_modes == 0) { |
1417 | connector->funcs->fill_modes(connector, | |
1418 | dev->mode_config.max_width, | |
1419 | dev->mode_config.max_height); | |
1420 | } | |
1421 | ||
52217195 DV |
1422 | out_resp->mm_width = connector->display_info.width_mm; |
1423 | out_resp->mm_height = connector->display_info.height_mm; | |
1424 | out_resp->subpixel = connector->display_info.subpixel_order; | |
1425 | out_resp->connection = connector->status; | |
1426 | ||
91eefc05 DV |
1427 | /* delayed so we get modes regardless of pre-fill_modes state */ |
1428 | list_for_each_entry(mode, &connector->modes, head) | |
1429 | if (drm_mode_expose_to_userspace(mode, file_priv)) | |
1430 | mode_count++; | |
52217195 DV |
1431 | |
1432 | /* | |
1433 | * This ioctl is called twice, once to determine how much space is | |
1434 | * needed, and the 2nd time to fill it. | |
1435 | */ | |
1436 | if ((out_resp->count_modes >= mode_count) && mode_count) { | |
1437 | copied = 0; | |
1438 | mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; | |
1439 | list_for_each_entry(mode, &connector->modes, head) { | |
1440 | if (!drm_mode_expose_to_userspace(mode, file_priv)) | |
1441 | continue; | |
1442 | ||
1443 | drm_mode_convert_to_umode(&u_mode, mode); | |
1444 | if (copy_to_user(mode_ptr + copied, | |
1445 | &u_mode, sizeof(u_mode))) { | |
1446 | ret = -EFAULT; | |
e94ac351 DV |
1447 | mutex_unlock(&dev->mode_config.mutex); |
1448 | ||
52217195 DV |
1449 | goto out; |
1450 | } | |
1451 | copied++; | |
1452 | } | |
1453 | } | |
1454 | out_resp->count_modes = mode_count; | |
52217195 | 1455 | mutex_unlock(&dev->mode_config.mutex); |
e94ac351 DV |
1456 | |
1457 | drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); | |
1458 | encoder = drm_connector_get_encoder(connector); | |
1459 | if (encoder) | |
1460 | out_resp->encoder_id = encoder->base.id; | |
1461 | else | |
1462 | out_resp->encoder_id = 0; | |
1463 | ||
1464 | /* Only grab properties after probing, to make sure EDID and other | |
1465 | * properties reflect the latest status. */ | |
1466 | ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic, | |
1467 | (uint32_t __user *)(unsigned long)(out_resp->props_ptr), | |
1468 | (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), | |
1469 | &out_resp->count_props); | |
1470 | drm_modeset_unlock(&dev->mode_config.connection_mutex); | |
1471 | ||
1472 | out: | |
ad093607 | 1473 | drm_connector_put(connector); |
52217195 DV |
1474 | |
1475 | return ret; | |
1476 | } | |
1477 | ||
9498c19b DV |
1478 | |
1479 | /** | |
1480 | * DOC: Tile group | |
1481 | * | |
1482 | * Tile groups are used to represent tiled monitors with a unique integer | |
1483 | * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle, | |
1484 | * we store this in a tile group, so we have a common identifier for all tiles | |
1485 | * in a monitor group. The property is called "TILE". Drivers can manage tile | |
1486 | * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and | |
1487 | * drm_mode_get_tile_group(). But this is only needed for internal panels where | |
1488 | * the tile group information is exposed through a non-standard way. | |
1489 | */ | |
1490 | ||
1491 | static void drm_tile_group_free(struct kref *kref) | |
1492 | { | |
1493 | struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); | |
1494 | struct drm_device *dev = tg->dev; | |
1495 | mutex_lock(&dev->mode_config.idr_mutex); | |
1496 | idr_remove(&dev->mode_config.tile_idr, tg->id); | |
1497 | mutex_unlock(&dev->mode_config.idr_mutex); | |
1498 | kfree(tg); | |
1499 | } | |
1500 | ||
1501 | /** | |
1502 | * drm_mode_put_tile_group - drop a reference to a tile group. | |
1503 | * @dev: DRM device | |
1504 | * @tg: tile group to drop reference to. | |
1505 | * | |
1506 | * drop reference to tile group and free if 0. | |
1507 | */ | |
1508 | void drm_mode_put_tile_group(struct drm_device *dev, | |
1509 | struct drm_tile_group *tg) | |
1510 | { | |
1511 | kref_put(&tg->refcount, drm_tile_group_free); | |
1512 | } | |
1513 | EXPORT_SYMBOL(drm_mode_put_tile_group); | |
1514 | ||
1515 | /** | |
1516 | * drm_mode_get_tile_group - get a reference to an existing tile group | |
1517 | * @dev: DRM device | |
1518 | * @topology: 8-bytes unique per monitor. | |
1519 | * | |
1520 | * Use the unique bytes to get a reference to an existing tile group. | |
1521 | * | |
1522 | * RETURNS: | |
1523 | * tile group or NULL if not found. | |
1524 | */ | |
1525 | struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, | |
1526 | char topology[8]) | |
1527 | { | |
1528 | struct drm_tile_group *tg; | |
1529 | int id; | |
1530 | mutex_lock(&dev->mode_config.idr_mutex); | |
1531 | idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { | |
1532 | if (!memcmp(tg->group_data, topology, 8)) { | |
1533 | if (!kref_get_unless_zero(&tg->refcount)) | |
1534 | tg = NULL; | |
1535 | mutex_unlock(&dev->mode_config.idr_mutex); | |
1536 | return tg; | |
1537 | } | |
1538 | } | |
1539 | mutex_unlock(&dev->mode_config.idr_mutex); | |
1540 | return NULL; | |
1541 | } | |
1542 | EXPORT_SYMBOL(drm_mode_get_tile_group); | |
1543 | ||
1544 | /** | |
1545 | * drm_mode_create_tile_group - create a tile group from a displayid description | |
1546 | * @dev: DRM device | |
1547 | * @topology: 8-bytes unique per monitor. | |
1548 | * | |
1549 | * Create a tile group for the unique monitor, and get a unique | |
1550 | * identifier for the tile group. | |
1551 | * | |
1552 | * RETURNS: | |
1553 | * new tile group or error. | |
1554 | */ | |
1555 | struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, | |
1556 | char topology[8]) | |
1557 | { | |
1558 | struct drm_tile_group *tg; | |
1559 | int ret; | |
1560 | ||
1561 | tg = kzalloc(sizeof(*tg), GFP_KERNEL); | |
1562 | if (!tg) | |
1563 | return ERR_PTR(-ENOMEM); | |
1564 | ||
1565 | kref_init(&tg->refcount); | |
1566 | memcpy(tg->group_data, topology, 8); | |
1567 | tg->dev = dev; | |
1568 | ||
1569 | mutex_lock(&dev->mode_config.idr_mutex); | |
1570 | ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); | |
1571 | if (ret >= 0) { | |
1572 | tg->id = ret; | |
1573 | } else { | |
1574 | kfree(tg); | |
1575 | tg = ERR_PTR(ret); | |
1576 | } | |
1577 | ||
1578 | mutex_unlock(&dev->mode_config.idr_mutex); | |
1579 | return tg; | |
1580 | } | |
1581 | EXPORT_SYMBOL(drm_mode_create_tile_group); |