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 | ||
52217195 DV |
23 | #include <drm/drm_connector.h> |
24 | #include <drm/drm_edid.h> | |
9338203c | 25 | #include <drm/drm_encoder.h> |
8d70f395 | 26 | #include <drm/drm_utils.h> |
99f45e32 DV |
27 | #include <drm/drm_print.h> |
28 | #include <drm/drm_drv.h> | |
29 | #include <drm/drm_file.h> | |
30 | ||
31 | #include <linux/uaccess.h> | |
52217195 DV |
32 | |
33 | #include "drm_crtc_internal.h" | |
34 | #include "drm_internal.h" | |
35 | ||
ae2a6da8 DV |
36 | /** |
37 | * DOC: overview | |
38 | * | |
39 | * In DRM connectors are the general abstraction for display sinks, and include | |
40 | * als fixed panels or anything else that can display pixels in some form. As | |
41 | * opposed to all other KMS objects representing hardware (like CRTC, encoder or | |
42 | * plane abstractions) connectors can be hotplugged and unplugged at runtime. | |
ad093607 TR |
43 | * Hence they are reference-counted using drm_connector_get() and |
44 | * drm_connector_put(). | |
ae2a6da8 | 45 | * |
d574528a DV |
46 | * KMS driver must create, initialize, register and attach at a &struct |
47 | * drm_connector for each such sink. The instance is created as other KMS | |
aec97460 DV |
48 | * objects and initialized by setting the following fields. The connector is |
49 | * initialized with a call to drm_connector_init() with a pointer to the | |
50 | * &struct drm_connector_funcs and a connector type, and then exposed to | |
51 | * userspace with a call to drm_connector_register(). | |
ae2a6da8 DV |
52 | * |
53 | * Connectors must be attached to an encoder to be used. For devices that map | |
54 | * connectors to encoders 1:1, the connector should be attached at | |
cde4c44d | 55 | * initialization time with a call to drm_connector_attach_encoder(). The |
d574528a | 56 | * driver must also set the &drm_connector.encoder field to point to the |
ae2a6da8 DV |
57 | * attached encoder. |
58 | * | |
59 | * For connectors which are not fixed (like built-in panels) the driver needs to | |
60 | * support hotplug notifications. The simplest way to do that is by using the | |
61 | * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have | |
62 | * hardware support for hotplug interrupts. Connectors with hardware hotplug | |
63 | * support can instead use e.g. drm_helper_hpd_irq_event(). | |
64 | */ | |
65 | ||
52217195 DV |
66 | struct drm_conn_prop_enum_list { |
67 | int type; | |
68 | const char *name; | |
69 | struct ida ida; | |
70 | }; | |
71 | ||
72 | /* | |
73 | * Connector and encoder types. | |
74 | */ | |
75 | static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { | |
76 | { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, | |
77 | { DRM_MODE_CONNECTOR_VGA, "VGA" }, | |
78 | { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, | |
79 | { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, | |
80 | { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, | |
81 | { DRM_MODE_CONNECTOR_Composite, "Composite" }, | |
82 | { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, | |
83 | { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, | |
84 | { DRM_MODE_CONNECTOR_Component, "Component" }, | |
85 | { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, | |
86 | { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, | |
87 | { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, | |
88 | { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, | |
89 | { DRM_MODE_CONNECTOR_TV, "TV" }, | |
90 | { DRM_MODE_CONNECTOR_eDP, "eDP" }, | |
91 | { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, | |
92 | { DRM_MODE_CONNECTOR_DSI, "DSI" }, | |
93 | { DRM_MODE_CONNECTOR_DPI, "DPI" }, | |
935774cd | 94 | { DRM_MODE_CONNECTOR_WRITEBACK, "Writeback" }, |
fc06bf1d | 95 | { DRM_MODE_CONNECTOR_SPI, "SPI" }, |
52217195 DV |
96 | }; |
97 | ||
98 | void drm_connector_ida_init(void) | |
99 | { | |
100 | int i; | |
101 | ||
102 | for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) | |
103 | ida_init(&drm_connector_enum_list[i].ida); | |
104 | } | |
105 | ||
106 | void drm_connector_ida_destroy(void) | |
107 | { | |
108 | int i; | |
109 | ||
110 | for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) | |
111 | ida_destroy(&drm_connector_enum_list[i].ida); | |
112 | } | |
113 | ||
b35f90f2 LP |
114 | /** |
115 | * drm_get_connector_type_name - return a string for connector type | |
116 | * @type: The connector type (DRM_MODE_CONNECTOR_*) | |
117 | * | |
118 | * Returns: the name of the connector type, or NULL if the type is not valid. | |
119 | */ | |
120 | const char *drm_get_connector_type_name(unsigned int type) | |
121 | { | |
122 | if (type < ARRAY_SIZE(drm_connector_enum_list)) | |
123 | return drm_connector_enum_list[type].name; | |
124 | ||
125 | return NULL; | |
126 | } | |
127 | EXPORT_SYMBOL(drm_get_connector_type_name); | |
128 | ||
52217195 DV |
129 | /** |
130 | * drm_connector_get_cmdline_mode - reads the user's cmdline mode | |
131 | * @connector: connector to quwery | |
132 | * | |
ae2a6da8 | 133 | * The kernel supports per-connector configuration of its consoles through |
52217195 DV |
134 | * use of the video= parameter. This function parses that option and |
135 | * extracts the user's specified mode (or enable/disable status) for a | |
136 | * particular connector. This is typically only used during the early fbdev | |
137 | * setup. | |
138 | */ | |
139 | static void drm_connector_get_cmdline_mode(struct drm_connector *connector) | |
140 | { | |
141 | struct drm_cmdline_mode *mode = &connector->cmdline_mode; | |
142 | char *option = NULL; | |
143 | ||
144 | if (fb_get_options(connector->name, &option)) | |
145 | return; | |
146 | ||
147 | if (!drm_mode_parse_command_line_for_connector(option, | |
148 | connector, | |
149 | mode)) | |
150 | return; | |
151 | ||
152 | if (mode->force) { | |
6140cf20 JN |
153 | DRM_INFO("forcing %s connector %s\n", connector->name, |
154 | drm_get_connector_force_name(mode->force)); | |
52217195 DV |
155 | connector->force = mode->force; |
156 | } | |
157 | ||
0980939d HG |
158 | if (mode->panel_orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) { |
159 | DRM_INFO("cmdline forces connector %s panel_orientation to %d\n", | |
160 | connector->name, mode->panel_orientation); | |
161 | drm_connector_set_panel_orientation(connector, | |
162 | mode->panel_orientation); | |
163 | } | |
164 | ||
3aeeb13d | 165 | DRM_DEBUG_KMS("cmdline mode for connector %s %s %dx%d@%dHz%s%s%s\n", |
50b0946d | 166 | connector->name, mode->name, |
52217195 DV |
167 | mode->xres, mode->yres, |
168 | mode->refresh_specified ? mode->refresh : 60, | |
169 | mode->rb ? " reduced blanking" : "", | |
170 | mode->margins ? " with margins" : "", | |
171 | mode->interlace ? " interlaced" : ""); | |
172 | } | |
173 | ||
174 | static void drm_connector_free(struct kref *kref) | |
175 | { | |
176 | struct drm_connector *connector = | |
177 | container_of(kref, struct drm_connector, base.refcount); | |
178 | struct drm_device *dev = connector->dev; | |
179 | ||
180 | drm_mode_object_unregister(dev, &connector->base); | |
181 | connector->funcs->destroy(connector); | |
182 | } | |
183 | ||
ea497bb9 | 184 | void drm_connector_free_work_fn(struct work_struct *work) |
a703c550 | 185 | { |
ea497bb9 DV |
186 | struct drm_connector *connector, *n; |
187 | struct drm_device *dev = | |
188 | container_of(work, struct drm_device, mode_config.connector_free_work); | |
189 | struct drm_mode_config *config = &dev->mode_config; | |
190 | unsigned long flags; | |
191 | struct llist_node *freed; | |
a703c550 | 192 | |
ea497bb9 DV |
193 | spin_lock_irqsave(&config->connector_list_lock, flags); |
194 | freed = llist_del_all(&config->connector_free_list); | |
195 | spin_unlock_irqrestore(&config->connector_list_lock, flags); | |
196 | ||
197 | llist_for_each_entry_safe(connector, n, freed, free_node) { | |
198 | drm_mode_object_unregister(dev, &connector->base); | |
199 | connector->funcs->destroy(connector); | |
200 | } | |
a703c550 DV |
201 | } |
202 | ||
52217195 DV |
203 | /** |
204 | * drm_connector_init - Init a preallocated connector | |
205 | * @dev: DRM device | |
206 | * @connector: the connector to init | |
207 | * @funcs: callbacks for this connector | |
208 | * @connector_type: user visible type of the connector | |
209 | * | |
210 | * Initialises a preallocated connector. Connectors should be | |
211 | * subclassed as part of driver connector objects. | |
212 | * | |
213 | * Returns: | |
214 | * Zero on success, error code on failure. | |
215 | */ | |
216 | int drm_connector_init(struct drm_device *dev, | |
217 | struct drm_connector *connector, | |
218 | const struct drm_connector_funcs *funcs, | |
219 | int connector_type) | |
220 | { | |
221 | struct drm_mode_config *config = &dev->mode_config; | |
222 | int ret; | |
223 | struct ida *connector_ida = | |
224 | &drm_connector_enum_list[connector_type].ida; | |
225 | ||
ba1f665f HM |
226 | WARN_ON(drm_drv_uses_atomic_modeset(dev) && |
227 | (!funcs->atomic_destroy_state || | |
228 | !funcs->atomic_duplicate_state)); | |
229 | ||
2135ea7a TR |
230 | ret = __drm_mode_object_add(dev, &connector->base, |
231 | DRM_MODE_OBJECT_CONNECTOR, | |
232 | false, drm_connector_free); | |
52217195 | 233 | if (ret) |
613051da | 234 | return ret; |
52217195 DV |
235 | |
236 | connector->base.properties = &connector->properties; | |
237 | connector->dev = dev; | |
238 | connector->funcs = funcs; | |
239 | ||
2a8d3eac VS |
240 | /* connector index is used with 32bit bitmasks */ |
241 | ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL); | |
242 | if (ret < 0) { | |
243 | DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n", | |
244 | drm_connector_enum_list[connector_type].name, | |
245 | ret); | |
52217195 | 246 | goto out_put; |
2a8d3eac | 247 | } |
52217195 DV |
248 | connector->index = ret; |
249 | ret = 0; | |
250 | ||
251 | connector->connector_type = connector_type; | |
252 | connector->connector_type_id = | |
253 | ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); | |
254 | if (connector->connector_type_id < 0) { | |
255 | ret = connector->connector_type_id; | |
256 | goto out_put_id; | |
257 | } | |
258 | connector->name = | |
259 | kasprintf(GFP_KERNEL, "%s-%d", | |
260 | drm_connector_enum_list[connector_type].name, | |
261 | connector->connector_type_id); | |
262 | if (!connector->name) { | |
263 | ret = -ENOMEM; | |
264 | goto out_put_type_id; | |
265 | } | |
266 | ||
267 | INIT_LIST_HEAD(&connector->probed_modes); | |
268 | INIT_LIST_HEAD(&connector->modes); | |
e73ab00e | 269 | mutex_init(&connector->mutex); |
52217195 | 270 | connector->edid_blob_ptr = NULL; |
2de3a078 | 271 | connector->tile_blob_ptr = NULL; |
52217195 | 272 | connector->status = connector_status_unknown; |
8d70f395 HG |
273 | connector->display_info.panel_orientation = |
274 | DRM_MODE_PANEL_ORIENTATION_UNKNOWN; | |
52217195 DV |
275 | |
276 | drm_connector_get_cmdline_mode(connector); | |
277 | ||
278 | /* We should add connectors at the end to avoid upsetting the connector | |
279 | * index too much. */ | |
613051da | 280 | spin_lock_irq(&config->connector_list_lock); |
52217195 DV |
281 | list_add_tail(&connector->head, &config->connector_list); |
282 | config->num_connector++; | |
613051da | 283 | spin_unlock_irq(&config->connector_list_lock); |
52217195 | 284 | |
935774cd BS |
285 | if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL && |
286 | connector_type != DRM_MODE_CONNECTOR_WRITEBACK) | |
6b7e2d5c | 287 | drm_connector_attach_edid_property(connector); |
52217195 DV |
288 | |
289 | drm_object_attach_property(&connector->base, | |
290 | config->dpms_property, 0); | |
291 | ||
40ee6fbe MN |
292 | drm_object_attach_property(&connector->base, |
293 | config->link_status_property, | |
294 | 0); | |
295 | ||
66660d4c DA |
296 | drm_object_attach_property(&connector->base, |
297 | config->non_desktop_property, | |
298 | 0); | |
2de3a078 MN |
299 | drm_object_attach_property(&connector->base, |
300 | config->tile_property, | |
301 | 0); | |
66660d4c | 302 | |
52217195 DV |
303 | if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { |
304 | drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); | |
305 | } | |
306 | ||
307 | connector->debugfs_entry = NULL; | |
308 | out_put_type_id: | |
309 | if (ret) | |
587680c1 | 310 | ida_simple_remove(connector_ida, connector->connector_type_id); |
52217195 DV |
311 | out_put_id: |
312 | if (ret) | |
587680c1 | 313 | ida_simple_remove(&config->connector_ida, connector->index); |
52217195 DV |
314 | out_put: |
315 | if (ret) | |
316 | drm_mode_object_unregister(dev, &connector->base); | |
317 | ||
52217195 DV |
318 | return ret; |
319 | } | |
320 | EXPORT_SYMBOL(drm_connector_init); | |
321 | ||
100163df AP |
322 | /** |
323 | * drm_connector_init_with_ddc - Init a preallocated connector | |
324 | * @dev: DRM device | |
325 | * @connector: the connector to init | |
326 | * @funcs: callbacks for this connector | |
327 | * @connector_type: user visible type of the connector | |
328 | * @ddc: pointer to the associated ddc adapter | |
329 | * | |
330 | * Initialises a preallocated connector. Connectors should be | |
331 | * subclassed as part of driver connector objects. | |
332 | * | |
333 | * Ensures that the ddc field of the connector is correctly set. | |
334 | * | |
335 | * Returns: | |
336 | * Zero on success, error code on failure. | |
337 | */ | |
338 | int drm_connector_init_with_ddc(struct drm_device *dev, | |
339 | struct drm_connector *connector, | |
340 | const struct drm_connector_funcs *funcs, | |
341 | int connector_type, | |
342 | struct i2c_adapter *ddc) | |
343 | { | |
344 | int ret; | |
345 | ||
346 | ret = drm_connector_init(dev, connector, funcs, connector_type); | |
347 | if (ret) | |
348 | return ret; | |
349 | ||
350 | /* provide ddc symlink in sysfs */ | |
351 | connector->ddc = ddc; | |
352 | ||
353 | return ret; | |
354 | } | |
355 | EXPORT_SYMBOL(drm_connector_init_with_ddc); | |
356 | ||
6b7e2d5c GH |
357 | /** |
358 | * drm_connector_attach_edid_property - attach edid property. | |
6b7e2d5c GH |
359 | * @connector: the connector |
360 | * | |
361 | * Some connector types like DRM_MODE_CONNECTOR_VIRTUAL do not get a | |
362 | * edid property attached by default. This function can be used to | |
363 | * explicitly enable the edid property in these cases. | |
364 | */ | |
365 | void drm_connector_attach_edid_property(struct drm_connector *connector) | |
366 | { | |
367 | struct drm_mode_config *config = &connector->dev->mode_config; | |
368 | ||
369 | drm_object_attach_property(&connector->base, | |
370 | config->edid_property, | |
371 | 0); | |
372 | } | |
373 | EXPORT_SYMBOL(drm_connector_attach_edid_property); | |
374 | ||
52217195 | 375 | /** |
cde4c44d | 376 | * drm_connector_attach_encoder - attach a connector to an encoder |
52217195 DV |
377 | * @connector: connector to attach |
378 | * @encoder: encoder to attach @connector to | |
379 | * | |
380 | * This function links up a connector to an encoder. Note that the routing | |
381 | * restrictions between encoders and crtcs are exposed to userspace through the | |
382 | * possible_clones and possible_crtcs bitmasks. | |
383 | * | |
384 | * Returns: | |
385 | * Zero on success, negative errno on failure. | |
386 | */ | |
cde4c44d DV |
387 | int drm_connector_attach_encoder(struct drm_connector *connector, |
388 | struct drm_encoder *encoder) | |
52217195 | 389 | { |
52217195 DV |
390 | /* |
391 | * In the past, drivers have attempted to model the static association | |
392 | * of connector to encoder in simple connector/encoder devices using a | |
393 | * direct assignment of connector->encoder = encoder. This connection | |
394 | * is a logical one and the responsibility of the core, so drivers are | |
395 | * expected not to mess with this. | |
396 | * | |
397 | * Note that the error return should've been enough here, but a large | |
398 | * majority of drivers ignores the return value, so add in a big WARN | |
399 | * to get people's attention. | |
400 | */ | |
401 | if (WARN_ON(connector->encoder)) | |
402 | return -EINVAL; | |
403 | ||
62afb4ad JRS |
404 | connector->possible_encoders |= drm_encoder_mask(encoder); |
405 | ||
406 | return 0; | |
52217195 | 407 | } |
cde4c44d | 408 | EXPORT_SYMBOL(drm_connector_attach_encoder); |
52217195 | 409 | |
38cb8d96 | 410 | /** |
62afb4ad JRS |
411 | * drm_connector_has_possible_encoder - check if the connector and encoder are |
412 | * associated with each other | |
38cb8d96 VS |
413 | * @connector: the connector |
414 | * @encoder: the encoder | |
415 | * | |
416 | * Returns: | |
417 | * True if @encoder is one of the possible encoders for @connector. | |
418 | */ | |
419 | bool drm_connector_has_possible_encoder(struct drm_connector *connector, | |
420 | struct drm_encoder *encoder) | |
421 | { | |
62afb4ad | 422 | return connector->possible_encoders & drm_encoder_mask(encoder); |
38cb8d96 VS |
423 | } |
424 | EXPORT_SYMBOL(drm_connector_has_possible_encoder); | |
425 | ||
52217195 DV |
426 | static void drm_mode_remove(struct drm_connector *connector, |
427 | struct drm_display_mode *mode) | |
428 | { | |
429 | list_del(&mode->head); | |
430 | drm_mode_destroy(connector->dev, mode); | |
431 | } | |
432 | ||
433 | /** | |
434 | * drm_connector_cleanup - cleans up an initialised connector | |
435 | * @connector: connector to cleanup | |
436 | * | |
437 | * Cleans up the connector but doesn't free the object. | |
438 | */ | |
439 | void drm_connector_cleanup(struct drm_connector *connector) | |
440 | { | |
441 | struct drm_device *dev = connector->dev; | |
442 | struct drm_display_mode *mode, *t; | |
443 | ||
444 | /* The connector should have been removed from userspace long before | |
445 | * it is finally destroyed. | |
446 | */ | |
39b50c60 LP |
447 | if (WARN_ON(connector->registration_state == |
448 | DRM_CONNECTOR_REGISTERED)) | |
52217195 DV |
449 | drm_connector_unregister(connector); |
450 | ||
451 | if (connector->tile_group) { | |
452 | drm_mode_put_tile_group(dev, connector->tile_group); | |
453 | connector->tile_group = NULL; | |
454 | } | |
455 | ||
456 | list_for_each_entry_safe(mode, t, &connector->probed_modes, head) | |
457 | drm_mode_remove(connector, mode); | |
458 | ||
459 | list_for_each_entry_safe(mode, t, &connector->modes, head) | |
460 | drm_mode_remove(connector, mode); | |
461 | ||
9a47dba1 CJ |
462 | ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida, |
463 | connector->connector_type_id); | |
52217195 | 464 | |
9a47dba1 CJ |
465 | ida_simple_remove(&dev->mode_config.connector_ida, |
466 | connector->index); | |
52217195 DV |
467 | |
468 | kfree(connector->display_info.bus_formats); | |
469 | drm_mode_object_unregister(dev, &connector->base); | |
470 | kfree(connector->name); | |
471 | connector->name = NULL; | |
613051da | 472 | spin_lock_irq(&dev->mode_config.connector_list_lock); |
52217195 DV |
473 | list_del(&connector->head); |
474 | dev->mode_config.num_connector--; | |
613051da | 475 | spin_unlock_irq(&dev->mode_config.connector_list_lock); |
52217195 DV |
476 | |
477 | WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); | |
478 | if (connector->state && connector->funcs->atomic_destroy_state) | |
479 | connector->funcs->atomic_destroy_state(connector, | |
480 | connector->state); | |
481 | ||
e73ab00e DV |
482 | mutex_destroy(&connector->mutex); |
483 | ||
52217195 DV |
484 | memset(connector, 0, sizeof(*connector)); |
485 | } | |
486 | EXPORT_SYMBOL(drm_connector_cleanup); | |
487 | ||
488 | /** | |
489 | * drm_connector_register - register a connector | |
490 | * @connector: the connector to register | |
491 | * | |
69b22f51 DV |
492 | * Register userspace interfaces for a connector. Only call this for connectors |
493 | * which can be hotplugged after drm_dev_register() has been called already, | |
494 | * e.g. DP MST connectors. All other connectors will be registered automatically | |
495 | * when calling drm_dev_register(). | |
52217195 DV |
496 | * |
497 | * Returns: | |
498 | * Zero on success, error code on failure. | |
499 | */ | |
500 | int drm_connector_register(struct drm_connector *connector) | |
501 | { | |
e73ab00e | 502 | int ret = 0; |
52217195 | 503 | |
e6e7b48b DV |
504 | if (!connector->dev->registered) |
505 | return 0; | |
506 | ||
e73ab00e | 507 | mutex_lock(&connector->mutex); |
39b50c60 | 508 | if (connector->registration_state != DRM_CONNECTOR_INITIALIZING) |
e73ab00e | 509 | goto unlock; |
52217195 DV |
510 | |
511 | ret = drm_sysfs_connector_add(connector); | |
512 | if (ret) | |
e73ab00e | 513 | goto unlock; |
52217195 | 514 | |
b792e640 | 515 | drm_debugfs_connector_add(connector); |
52217195 DV |
516 | |
517 | if (connector->funcs->late_register) { | |
518 | ret = connector->funcs->late_register(connector); | |
519 | if (ret) | |
520 | goto err_debugfs; | |
521 | } | |
522 | ||
523 | drm_mode_object_register(connector->dev, &connector->base); | |
524 | ||
39b50c60 | 525 | connector->registration_state = DRM_CONNECTOR_REGISTERED; |
e73ab00e | 526 | goto unlock; |
52217195 DV |
527 | |
528 | err_debugfs: | |
529 | drm_debugfs_connector_remove(connector); | |
52217195 | 530 | drm_sysfs_connector_remove(connector); |
e73ab00e DV |
531 | unlock: |
532 | mutex_unlock(&connector->mutex); | |
52217195 DV |
533 | return ret; |
534 | } | |
535 | EXPORT_SYMBOL(drm_connector_register); | |
536 | ||
537 | /** | |
538 | * drm_connector_unregister - unregister a connector | |
539 | * @connector: the connector to unregister | |
540 | * | |
69b22f51 DV |
541 | * Unregister userspace interfaces for a connector. Only call this for |
542 | * connectors which have registered explicitly by calling drm_dev_register(), | |
543 | * since connectors are unregistered automatically when drm_dev_unregister() is | |
544 | * called. | |
52217195 DV |
545 | */ |
546 | void drm_connector_unregister(struct drm_connector *connector) | |
547 | { | |
e73ab00e | 548 | mutex_lock(&connector->mutex); |
39b50c60 | 549 | if (connector->registration_state != DRM_CONNECTOR_REGISTERED) { |
e73ab00e | 550 | mutex_unlock(&connector->mutex); |
52217195 | 551 | return; |
e73ab00e | 552 | } |
52217195 DV |
553 | |
554 | if (connector->funcs->early_unregister) | |
555 | connector->funcs->early_unregister(connector); | |
556 | ||
557 | drm_sysfs_connector_remove(connector); | |
558 | drm_debugfs_connector_remove(connector); | |
559 | ||
39b50c60 | 560 | connector->registration_state = DRM_CONNECTOR_UNREGISTERED; |
e73ab00e | 561 | mutex_unlock(&connector->mutex); |
52217195 DV |
562 | } |
563 | EXPORT_SYMBOL(drm_connector_unregister); | |
564 | ||
565 | void drm_connector_unregister_all(struct drm_device *dev) | |
566 | { | |
567 | struct drm_connector *connector; | |
613051da | 568 | struct drm_connector_list_iter conn_iter; |
52217195 | 569 | |
b982dab1 | 570 | drm_connector_list_iter_begin(dev, &conn_iter); |
613051da | 571 | drm_for_each_connector_iter(connector, &conn_iter) |
52217195 | 572 | drm_connector_unregister(connector); |
b982dab1 | 573 | drm_connector_list_iter_end(&conn_iter); |
52217195 DV |
574 | } |
575 | ||
576 | int drm_connector_register_all(struct drm_device *dev) | |
577 | { | |
578 | struct drm_connector *connector; | |
613051da DV |
579 | struct drm_connector_list_iter conn_iter; |
580 | int ret = 0; | |
52217195 | 581 | |
b982dab1 | 582 | drm_connector_list_iter_begin(dev, &conn_iter); |
613051da | 583 | drm_for_each_connector_iter(connector, &conn_iter) { |
52217195 DV |
584 | ret = drm_connector_register(connector); |
585 | if (ret) | |
613051da | 586 | break; |
52217195 | 587 | } |
b982dab1 | 588 | drm_connector_list_iter_end(&conn_iter); |
52217195 | 589 | |
613051da DV |
590 | if (ret) |
591 | drm_connector_unregister_all(dev); | |
52217195 DV |
592 | return ret; |
593 | } | |
594 | ||
595 | /** | |
596 | * drm_get_connector_status_name - return a string for connector status | |
597 | * @status: connector status to compute name of | |
598 | * | |
599 | * In contrast to the other drm_get_*_name functions this one here returns a | |
600 | * const pointer and hence is threadsafe. | |
601 | */ | |
602 | const char *drm_get_connector_status_name(enum drm_connector_status status) | |
603 | { | |
604 | if (status == connector_status_connected) | |
605 | return "connected"; | |
606 | else if (status == connector_status_disconnected) | |
607 | return "disconnected"; | |
608 | else | |
609 | return "unknown"; | |
610 | } | |
611 | EXPORT_SYMBOL(drm_get_connector_status_name); | |
612 | ||
6140cf20 JN |
613 | /** |
614 | * drm_get_connector_force_name - return a string for connector force | |
615 | * @force: connector force to get name of | |
616 | * | |
617 | * Returns: const pointer to name. | |
618 | */ | |
619 | const char *drm_get_connector_force_name(enum drm_connector_force force) | |
620 | { | |
621 | switch (force) { | |
622 | case DRM_FORCE_UNSPECIFIED: | |
623 | return "unspecified"; | |
624 | case DRM_FORCE_OFF: | |
625 | return "off"; | |
626 | case DRM_FORCE_ON: | |
627 | return "on"; | |
628 | case DRM_FORCE_ON_DIGITAL: | |
629 | return "digital"; | |
630 | default: | |
631 | return "unknown"; | |
632 | } | |
633 | } | |
634 | ||
613051da DV |
635 | #ifdef CONFIG_LOCKDEP |
636 | static struct lockdep_map connector_list_iter_dep_map = { | |
637 | .name = "drm_connector_list_iter" | |
638 | }; | |
639 | #endif | |
640 | ||
641 | /** | |
b982dab1 | 642 | * drm_connector_list_iter_begin - initialize a connector_list iterator |
613051da DV |
643 | * @dev: DRM device |
644 | * @iter: connector_list iterator | |
645 | * | |
d574528a | 646 | * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter |
b982dab1 | 647 | * must always be cleaned up again by calling drm_connector_list_iter_end(). |
613051da DV |
648 | * Iteration itself happens using drm_connector_list_iter_next() or |
649 | * drm_for_each_connector_iter(). | |
650 | */ | |
b982dab1 TR |
651 | void drm_connector_list_iter_begin(struct drm_device *dev, |
652 | struct drm_connector_list_iter *iter) | |
613051da DV |
653 | { |
654 | iter->dev = dev; | |
655 | iter->conn = NULL; | |
656 | lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_); | |
657 | } | |
b982dab1 | 658 | EXPORT_SYMBOL(drm_connector_list_iter_begin); |
613051da | 659 | |
a703c550 DV |
660 | /* |
661 | * Extra-safe connector put function that works in any context. Should only be | |
662 | * used from the connector_iter functions, where we never really expect to | |
663 | * actually release the connector when dropping our final reference. | |
664 | */ | |
665 | static void | |
ea497bb9 | 666 | __drm_connector_put_safe(struct drm_connector *conn) |
a703c550 | 667 | { |
ea497bb9 DV |
668 | struct drm_mode_config *config = &conn->dev->mode_config; |
669 | ||
670 | lockdep_assert_held(&config->connector_list_lock); | |
671 | ||
672 | if (!refcount_dec_and_test(&conn->base.refcount.refcount)) | |
673 | return; | |
674 | ||
675 | llist_add(&conn->free_node, &config->connector_free_list); | |
676 | schedule_work(&config->connector_free_work); | |
a703c550 DV |
677 | } |
678 | ||
613051da DV |
679 | /** |
680 | * drm_connector_list_iter_next - return next connector | |
4f45c778 | 681 | * @iter: connector_list iterator |
613051da DV |
682 | * |
683 | * Returns the next connector for @iter, or NULL when the list walk has | |
684 | * completed. | |
685 | */ | |
686 | struct drm_connector * | |
687 | drm_connector_list_iter_next(struct drm_connector_list_iter *iter) | |
688 | { | |
689 | struct drm_connector *old_conn = iter->conn; | |
690 | struct drm_mode_config *config = &iter->dev->mode_config; | |
691 | struct list_head *lhead; | |
692 | unsigned long flags; | |
693 | ||
694 | spin_lock_irqsave(&config->connector_list_lock, flags); | |
695 | lhead = old_conn ? &old_conn->head : &config->connector_list; | |
696 | ||
697 | do { | |
698 | if (lhead->next == &config->connector_list) { | |
699 | iter->conn = NULL; | |
700 | break; | |
701 | } | |
702 | ||
703 | lhead = lhead->next; | |
704 | iter->conn = list_entry(lhead, struct drm_connector, head); | |
705 | ||
706 | /* loop until it's not a zombie connector */ | |
707 | } while (!kref_get_unless_zero(&iter->conn->base.refcount)); | |
613051da DV |
708 | |
709 | if (old_conn) | |
ea497bb9 DV |
710 | __drm_connector_put_safe(old_conn); |
711 | spin_unlock_irqrestore(&config->connector_list_lock, flags); | |
613051da DV |
712 | |
713 | return iter->conn; | |
714 | } | |
715 | EXPORT_SYMBOL(drm_connector_list_iter_next); | |
716 | ||
717 | /** | |
b982dab1 | 718 | * drm_connector_list_iter_end - tear down a connector_list iterator |
613051da DV |
719 | * @iter: connector_list iterator |
720 | * | |
721 | * Tears down @iter and releases any resources (like &drm_connector references) | |
722 | * acquired while walking the list. This must always be called, both when the | |
723 | * iteration completes fully or when it was aborted without walking the entire | |
724 | * list. | |
725 | */ | |
b982dab1 | 726 | void drm_connector_list_iter_end(struct drm_connector_list_iter *iter) |
613051da | 727 | { |
ea497bb9 DV |
728 | struct drm_mode_config *config = &iter->dev->mode_config; |
729 | unsigned long flags; | |
730 | ||
613051da | 731 | iter->dev = NULL; |
ea497bb9 DV |
732 | if (iter->conn) { |
733 | spin_lock_irqsave(&config->connector_list_lock, flags); | |
734 | __drm_connector_put_safe(iter->conn); | |
735 | spin_unlock_irqrestore(&config->connector_list_lock, flags); | |
736 | } | |
5facae4f | 737 | lock_release(&connector_list_iter_dep_map, _RET_IP_); |
613051da | 738 | } |
b982dab1 | 739 | EXPORT_SYMBOL(drm_connector_list_iter_end); |
613051da | 740 | |
52217195 DV |
741 | static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { |
742 | { SubPixelUnknown, "Unknown" }, | |
743 | { SubPixelHorizontalRGB, "Horizontal RGB" }, | |
744 | { SubPixelHorizontalBGR, "Horizontal BGR" }, | |
745 | { SubPixelVerticalRGB, "Vertical RGB" }, | |
746 | { SubPixelVerticalBGR, "Vertical BGR" }, | |
747 | { SubPixelNone, "None" }, | |
748 | }; | |
749 | ||
750 | /** | |
751 | * drm_get_subpixel_order_name - return a string for a given subpixel enum | |
752 | * @order: enum of subpixel_order | |
753 | * | |
754 | * Note you could abuse this and return something out of bounds, but that | |
755 | * would be a caller error. No unscrubbed user data should make it here. | |
756 | */ | |
757 | const char *drm_get_subpixel_order_name(enum subpixel_order order) | |
758 | { | |
759 | return drm_subpixel_enum_list[order].name; | |
760 | } | |
761 | EXPORT_SYMBOL(drm_get_subpixel_order_name); | |
762 | ||
763 | static const struct drm_prop_enum_list drm_dpms_enum_list[] = { | |
764 | { DRM_MODE_DPMS_ON, "On" }, | |
765 | { DRM_MODE_DPMS_STANDBY, "Standby" }, | |
766 | { DRM_MODE_DPMS_SUSPEND, "Suspend" }, | |
767 | { DRM_MODE_DPMS_OFF, "Off" } | |
768 | }; | |
769 | DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) | |
770 | ||
40ee6fbe MN |
771 | static const struct drm_prop_enum_list drm_link_status_enum_list[] = { |
772 | { DRM_MODE_LINK_STATUS_GOOD, "Good" }, | |
773 | { DRM_MODE_LINK_STATUS_BAD, "Bad" }, | |
774 | }; | |
40ee6fbe | 775 | |
b3c6c8bf DV |
776 | /** |
777 | * drm_display_info_set_bus_formats - set the supported bus formats | |
778 | * @info: display info to store bus formats in | |
779 | * @formats: array containing the supported bus formats | |
780 | * @num_formats: the number of entries in the fmts array | |
781 | * | |
782 | * Store the supported bus formats in display info structure. | |
783 | * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for | |
784 | * a full list of available formats. | |
785 | */ | |
786 | int drm_display_info_set_bus_formats(struct drm_display_info *info, | |
787 | const u32 *formats, | |
788 | unsigned int num_formats) | |
789 | { | |
790 | u32 *fmts = NULL; | |
791 | ||
792 | if (!formats && num_formats) | |
793 | return -EINVAL; | |
794 | ||
795 | if (formats && num_formats) { | |
796 | fmts = kmemdup(formats, sizeof(*formats) * num_formats, | |
797 | GFP_KERNEL); | |
798 | if (!fmts) | |
799 | return -ENOMEM; | |
800 | } | |
801 | ||
802 | kfree(info->bus_formats); | |
803 | info->bus_formats = fmts; | |
804 | info->num_bus_formats = num_formats; | |
805 | ||
806 | return 0; | |
807 | } | |
808 | EXPORT_SYMBOL(drm_display_info_set_bus_formats); | |
809 | ||
52217195 DV |
810 | /* Optional connector properties. */ |
811 | static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { | |
812 | { DRM_MODE_SCALE_NONE, "None" }, | |
813 | { DRM_MODE_SCALE_FULLSCREEN, "Full" }, | |
814 | { DRM_MODE_SCALE_CENTER, "Center" }, | |
815 | { DRM_MODE_SCALE_ASPECT, "Full aspect" }, | |
816 | }; | |
817 | ||
818 | static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { | |
819 | { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, | |
820 | { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, | |
821 | { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, | |
822 | }; | |
823 | ||
50525c33 SL |
824 | static const struct drm_prop_enum_list drm_content_type_enum_list[] = { |
825 | { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" }, | |
826 | { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" }, | |
827 | { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" }, | |
828 | { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" }, | |
829 | { DRM_MODE_CONTENT_TYPE_GAME, "Game" }, | |
830 | }; | |
831 | ||
8d70f395 HG |
832 | static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = { |
833 | { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" }, | |
834 | { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" }, | |
835 | { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" }, | |
836 | { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" }, | |
837 | }; | |
838 | ||
52217195 DV |
839 | static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { |
840 | { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ | |
841 | { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ | |
842 | { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ | |
843 | }; | |
844 | DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) | |
845 | ||
846 | static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { | |
847 | { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ | |
848 | { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ | |
849 | { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ | |
850 | }; | |
851 | DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, | |
852 | drm_dvi_i_subconnector_enum_list) | |
853 | ||
854 | static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { | |
855 | { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ | |
856 | { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ | |
857 | { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ | |
858 | { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ | |
859 | { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ | |
860 | }; | |
861 | DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) | |
862 | ||
863 | static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { | |
864 | { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ | |
865 | { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ | |
866 | { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ | |
867 | { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ | |
868 | { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ | |
869 | }; | |
870 | DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, | |
871 | drm_tv_subconnector_enum_list) | |
872 | ||
d2c6a405 US |
873 | static const struct drm_prop_enum_list hdmi_colorspaces[] = { |
874 | /* For Default case, driver will set the colorspace */ | |
875 | { DRM_MODE_COLORIMETRY_DEFAULT, "Default" }, | |
876 | /* Standard Definition Colorimetry based on CEA 861 */ | |
877 | { DRM_MODE_COLORIMETRY_SMPTE_170M_YCC, "SMPTE_170M_YCC" }, | |
878 | { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" }, | |
879 | /* Standard Definition Colorimetry based on IEC 61966-2-4 */ | |
880 | { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" }, | |
881 | /* High Definition Colorimetry based on IEC 61966-2-4 */ | |
882 | { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" }, | |
883 | /* Colorimetry based on IEC 61966-2-1/Amendment 1 */ | |
884 | { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" }, | |
885 | /* Colorimetry based on IEC 61966-2-5 [33] */ | |
886 | { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" }, | |
887 | /* Colorimetry based on IEC 61966-2-5 */ | |
888 | { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" }, | |
889 | /* Colorimetry based on ITU-R BT.2020 */ | |
890 | { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" }, | |
891 | /* Colorimetry based on ITU-R BT.2020 */ | |
892 | { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" }, | |
893 | /* Colorimetry based on ITU-R BT.2020 */ | |
894 | { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" }, | |
895 | /* Added as part of Additional Colorimetry Extension in 861.G */ | |
896 | { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" }, | |
897 | { DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-P3_RGB_Theater" }, | |
898 | }; | |
899 | ||
45cf0e91 GM |
900 | /* |
901 | * As per DP 1.4a spec, 2.2.5.7.5 VSC SDP Payload for Pixel Encoding/Colorimetry | |
902 | * Format Table 2-120 | |
903 | */ | |
904 | static const struct drm_prop_enum_list dp_colorspaces[] = { | |
905 | /* For Default case, driver will set the colorspace */ | |
906 | { DRM_MODE_COLORIMETRY_DEFAULT, "Default" }, | |
907 | { DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED, "RGB_Wide_Gamut_Fixed_Point" }, | |
908 | /* Colorimetry based on scRGB (IEC 61966-2-2) */ | |
909 | { DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT, "RGB_Wide_Gamut_Floating_Point" }, | |
910 | /* Colorimetry based on IEC 61966-2-5 */ | |
911 | { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" }, | |
912 | /* Colorimetry based on SMPTE RP 431-2 */ | |
913 | { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" }, | |
914 | /* Colorimetry based on ITU-R BT.2020 */ | |
915 | { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" }, | |
916 | { DRM_MODE_COLORIMETRY_BT601_YCC, "BT601_YCC" }, | |
917 | { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" }, | |
918 | /* Standard Definition Colorimetry based on IEC 61966-2-4 */ | |
919 | { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" }, | |
920 | /* High Definition Colorimetry based on IEC 61966-2-4 */ | |
921 | { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" }, | |
922 | /* Colorimetry based on IEC 61966-2-1/Amendment 1 */ | |
923 | { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" }, | |
924 | /* Colorimetry based on IEC 61966-2-5 [33] */ | |
925 | { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" }, | |
926 | /* Colorimetry based on ITU-R BT.2020 */ | |
927 | { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" }, | |
928 | /* Colorimetry based on ITU-R BT.2020 */ | |
929 | { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" }, | |
930 | }; | |
931 | ||
4ada6f22 DV |
932 | /** |
933 | * DOC: standard connector properties | |
934 | * | |
935 | * DRM connectors have a few standardized properties: | |
936 | * | |
937 | * EDID: | |
938 | * Blob property which contains the current EDID read from the sink. This | |
939 | * is useful to parse sink identification information like vendor, model | |
940 | * and serial. Drivers should update this property by calling | |
c555f023 | 941 | * drm_connector_update_edid_property(), usually after having parsed |
4ada6f22 DV |
942 | * the EDID using drm_add_edid_modes(). Userspace cannot change this |
943 | * property. | |
944 | * DPMS: | |
945 | * Legacy property for setting the power state of the connector. For atomic | |
946 | * drivers this is only provided for backwards compatibility with existing | |
947 | * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the | |
948 | * connector is linked to. Drivers should never set this property directly, | |
d574528a | 949 | * it is handled by the DRM core by calling the &drm_connector_funcs.dpms |
144a7999 DV |
950 | * callback. For atomic drivers the remapping to the "ACTIVE" property is |
951 | * implemented in the DRM core. This is the only standard connector | |
952 | * property that userspace can change. | |
d0d1aee5 DV |
953 | * |
954 | * Note that this property cannot be set through the MODE_ATOMIC ioctl, | |
955 | * userspace must use "ACTIVE" on the CRTC instead. | |
956 | * | |
957 | * WARNING: | |
958 | * | |
959 | * For userspace also running on legacy drivers the "DPMS" semantics are a | |
960 | * lot more complicated. First, userspace cannot rely on the "DPMS" value | |
961 | * returned by the GETCONNECTOR actually reflecting reality, because many | |
962 | * drivers fail to update it. For atomic drivers this is taken care of in | |
963 | * drm_atomic_helper_update_legacy_modeset_state(). | |
964 | * | |
965 | * The second issue is that the DPMS state is only well-defined when the | |
966 | * connector is connected to a CRTC. In atomic the DRM core enforces that | |
967 | * "ACTIVE" is off in such a case, no such checks exists for "DPMS". | |
968 | * | |
969 | * Finally, when enabling an output using the legacy SETCONFIG ioctl then | |
970 | * "DPMS" is forced to ON. But see above, that might not be reflected in | |
971 | * the software value on legacy drivers. | |
972 | * | |
973 | * Summarizing: Only set "DPMS" when the connector is known to be enabled, | |
974 | * assume that a successful SETCONFIG call also sets "DPMS" to on, and | |
975 | * never read back the value of "DPMS" because it can be incorrect. | |
4ada6f22 DV |
976 | * PATH: |
977 | * Connector path property to identify how this sink is physically | |
978 | * connected. Used by DP MST. This should be set by calling | |
97e14fbe | 979 | * drm_connector_set_path_property(), in the case of DP MST with the |
4ada6f22 DV |
980 | * path property the MST manager created. Userspace cannot change this |
981 | * property. | |
982 | * TILE: | |
983 | * Connector tile group property to indicate how a set of DRM connector | |
984 | * compose together into one logical screen. This is used by both high-res | |
985 | * external screens (often only using a single cable, but exposing multiple | |
986 | * DP MST sinks), or high-res integrated panels (like dual-link DSI) which | |
987 | * are not gen-locked. Note that for tiled panels which are genlocked, like | |
988 | * dual-link LVDS or dual-link DSI, the driver should try to not expose the | |
989 | * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers | |
97e14fbe | 990 | * should update this value using drm_connector_set_tile_property(). |
4ada6f22 | 991 | * Userspace cannot change this property. |
40ee6fbe | 992 | * link-status: |
716719a3 SP |
993 | * Connector link-status property to indicate the status of link. The |
994 | * default value of link-status is "GOOD". If something fails during or | |
995 | * after modeset, the kernel driver may set this to "BAD" and issue a | |
996 | * hotplug uevent. Drivers should update this value using | |
97e14fbe | 997 | * drm_connector_set_link_status_property(). |
66660d4c DA |
998 | * non_desktop: |
999 | * Indicates the output should be ignored for purposes of displaying a | |
1000 | * standard desktop environment or console. This is most likely because | |
1001 | * the output device is not rectilinear. | |
24557865 SP |
1002 | * Content Protection: |
1003 | * This property is used by userspace to request the kernel protect future | |
1004 | * content communicated over the link. When requested, kernel will apply | |
1005 | * the appropriate means of protection (most often HDCP), and use the | |
1006 | * property to tell userspace the protection is active. | |
1007 | * | |
1008 | * Drivers can set this up by calling | |
1009 | * drm_connector_attach_content_protection_property() on initialization. | |
1010 | * | |
1011 | * The value of this property can be one of the following: | |
1012 | * | |
bbeba09f | 1013 | * DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0 |
24557865 | 1014 | * The link is not protected, content is transmitted in the clear. |
bbeba09f | 1015 | * DRM_MODE_CONTENT_PROTECTION_DESIRED = 1 |
24557865 SP |
1016 | * Userspace has requested content protection, but the link is not |
1017 | * currently protected. When in this state, kernel should enable | |
1018 | * Content Protection as soon as possible. | |
bbeba09f | 1019 | * DRM_MODE_CONTENT_PROTECTION_ENABLED = 2 |
24557865 SP |
1020 | * Userspace has requested content protection, and the link is |
1021 | * protected. Only the driver can set the property to this value. | |
1022 | * If userspace attempts to set to ENABLED, kernel will return | |
1023 | * -EINVAL. | |
1024 | * | |
1025 | * A few guidelines: | |
1026 | * | |
1027 | * - DESIRED state should be preserved until userspace de-asserts it by | |
1028 | * setting the property to UNDESIRED. This means ENABLED should only | |
1029 | * transition to UNDESIRED when the user explicitly requests it. | |
1030 | * - If the state is DESIRED, kernel should attempt to re-authenticate the | |
1031 | * link whenever possible. This includes across disable/enable, dpms, | |
1032 | * hotplug, downstream device changes, link status failures, etc.. | |
bb5a45d4 R |
1033 | * - Kernel sends uevent with the connector id and property id through |
1034 | * @drm_hdcp_update_content_protection, upon below kernel triggered | |
1035 | * scenarios: | |
12db36bc SP |
1036 | * |
1037 | * - DESIRED -> ENABLED (authentication success) | |
1038 | * - ENABLED -> DESIRED (termination of authentication) | |
bb5a45d4 R |
1039 | * - Please note no uevents for userspace triggered property state changes, |
1040 | * which can't fail such as | |
12db36bc SP |
1041 | * |
1042 | * - DESIRED/ENABLED -> UNDESIRED | |
1043 | * - UNDESIRED -> DESIRED | |
bb5a45d4 R |
1044 | * - Userspace is responsible for polling the property or listen to uevents |
1045 | * to determine when the value transitions from ENABLED to DESIRED. | |
1046 | * This signifies the link is no longer protected and userspace should | |
1047 | * take appropriate action (whatever that might be). | |
4ada6f22 | 1048 | * |
7672dbba R |
1049 | * HDCP Content Type: |
1050 | * This Enum property is used by the userspace to declare the content type | |
1051 | * of the display stream, to kernel. Here display stream stands for any | |
1052 | * display content that userspace intended to display through HDCP | |
1053 | * encryption. | |
1054 | * | |
1055 | * Content Type of a stream is decided by the owner of the stream, as | |
1056 | * "HDCP Type0" or "HDCP Type1". | |
1057 | * | |
1058 | * The value of the property can be one of the below: | |
1059 | * - "HDCP Type0": DRM_MODE_HDCP_CONTENT_TYPE0 = 0 | |
1060 | * - "HDCP Type1": DRM_MODE_HDCP_CONTENT_TYPE1 = 1 | |
1061 | * | |
1062 | * When kernel starts the HDCP authentication (see "Content Protection" | |
1063 | * for details), it uses the content type in "HDCP Content Type" | |
1064 | * for performing the HDCP authentication with the display sink. | |
1065 | * | |
1066 | * Please note in HDCP spec versions, a link can be authenticated with | |
1067 | * HDCP 2.2 for Content Type 0/Content Type 1. Where as a link can be | |
1068 | * authenticated with HDCP1.4 only for Content Type 0(though it is implicit | |
1069 | * in nature. As there is no reference for Content Type in HDCP1.4). | |
1070 | * | |
1071 | * HDCP2.2 authentication protocol itself takes the "Content Type" as a | |
1072 | * parameter, which is a input for the DP HDCP2.2 encryption algo. | |
1073 | * | |
1074 | * In case of Type 0 content protection request, kernel driver can choose | |
1075 | * either of HDCP spec versions 1.4 and 2.2. When HDCP2.2 is used for | |
1076 | * "HDCP Type 0", a HDCP 2.2 capable repeater in the downstream can send | |
1077 | * that content to a HDCP 1.4 authenticated HDCP sink (Type0 link). | |
1078 | * But if the content is classified as "HDCP Type 1", above mentioned | |
1079 | * HDCP 2.2 repeater wont send the content to the HDCP sink as it can't | |
1080 | * authenticate the HDCP1.4 capable sink for "HDCP Type 1". | |
1081 | * | |
1082 | * Please note userspace can be ignorant of the HDCP versions used by the | |
1083 | * kernel driver to achieve the "HDCP Content Type". | |
1084 | * | |
1085 | * At current scenario, classifying a content as Type 1 ensures that the | |
1086 | * content will be displayed only through the HDCP2.2 encrypted link. | |
1087 | * | |
1088 | * Note that the HDCP Content Type property is introduced at HDCP 2.2, and | |
1089 | * defaults to type 0. It is only exposed by drivers supporting HDCP 2.2 | |
1090 | * (hence supporting Type 0 and Type 1). Based on how next versions of | |
1091 | * HDCP specs are defined content Type could be used for higher versions | |
1092 | * too. | |
1093 | * | |
1094 | * If content type is changed when "Content Protection" is not UNDESIRED, | |
1095 | * then kernel will disable the HDCP and re-enable with new type in the | |
1096 | * same atomic commit. And when "Content Protection" is ENABLED, it means | |
1097 | * that link is HDCP authenticated and encrypted, for the transmission of | |
1098 | * the Type of stream mentioned at "HDCP Content Type". | |
1099 | * | |
a09db883 US |
1100 | * HDR_OUTPUT_METADATA: |
1101 | * Connector property to enable userspace to send HDR Metadata to | |
1102 | * driver. This metadata is based on the composition and blending | |
1103 | * policies decided by user, taking into account the hardware and | |
1104 | * sink capabilities. The driver gets this metadata and creates a | |
1105 | * Dynamic Range and Mastering Infoframe (DRM) in case of HDMI, | |
1106 | * SDP packet (Non-audio INFOFRAME SDP v1.3) for DP. This is then | |
1107 | * sent to sink. This notifies the sink of the upcoming frame's Color | |
1108 | * Encoding and Luminance parameters. | |
1109 | * | |
1110 | * Userspace first need to detect the HDR capabilities of sink by | |
1111 | * reading and parsing the EDID. Details of HDR metadata for HDMI | |
1112 | * are added in CTA 861.G spec. For DP , its defined in VESA DP | |
1113 | * Standard v1.4. It needs to then get the metadata information | |
1114 | * of the video/game/app content which are encoded in HDR (basically | |
1115 | * using HDR transfer functions). With this information it needs to | |
1116 | * decide on a blending policy and compose the relevant | |
1117 | * layers/overlays into a common format. Once this blending is done, | |
1118 | * userspace will be aware of the metadata of the composed frame to | |
1119 | * be send to sink. It then uses this property to communicate this | |
1120 | * metadata to driver which then make a Infoframe packet and sends | |
1121 | * to sink based on the type of encoder connected. | |
1122 | * | |
1123 | * Userspace will be responsible to do Tone mapping operation in case: | |
1124 | * - Some layers are HDR and others are SDR | |
1125 | * - HDR layers luminance is not same as sink | |
9f9b2559 | 1126 | * |
a09db883 US |
1127 | * It will even need to do colorspace conversion and get all layers |
1128 | * to one common colorspace for blending. It can use either GL, Media | |
1129 | * or display engine to get this done based on the capabilties of the | |
1130 | * associated hardware. | |
1131 | * | |
1132 | * Driver expects metadata to be put in &struct hdr_output_metadata | |
1133 | * structure from userspace. This is received as blob and stored in | |
1134 | * &drm_connector_state.hdr_output_metadata. It parses EDID and saves the | |
1135 | * sink metadata in &struct hdr_sink_metadata, as | |
1136 | * &drm_connector.hdr_sink_metadata. Driver uses | |
1137 | * drm_hdmi_infoframe_set_hdr_metadata() helper to set the HDR metadata, | |
1138 | * hdmi_drm_infoframe_pack() to pack the infoframe as per spec, in case of | |
1139 | * HDMI encoder. | |
1140 | * | |
47e22ff1 RS |
1141 | * max bpc: |
1142 | * This range property is used by userspace to limit the bit depth. When | |
1143 | * used the driver would limit the bpc in accordance with the valid range | |
1144 | * supported by the hardware and sink. Drivers to use the function | |
1145 | * drm_connector_attach_max_bpc_property() to create and attach the | |
1146 | * property to the connector during initialization. | |
1147 | * | |
4ada6f22 DV |
1148 | * Connectors also have one standardized atomic property: |
1149 | * | |
1150 | * CRTC_ID: | |
1151 | * Mode object ID of the &drm_crtc this connector should be connected to. | |
8d70f395 HG |
1152 | * |
1153 | * Connectors for LCD panels may also have one standardized property: | |
1154 | * | |
1155 | * panel orientation: | |
1156 | * On some devices the LCD panel is mounted in the casing in such a way | |
1157 | * that the up/top side of the panel does not match with the top side of | |
1158 | * the device. Userspace can use this property to check for this. | |
1159 | * Note that input coordinates from touchscreens (input devices with | |
1160 | * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel | |
1161 | * coordinates, so if userspace rotates the picture to adjust for | |
1162 | * the orientation it must also apply the same transformation to the | |
bbeba09f | 1163 | * touchscreen input coordinates. This property is initialized by calling |
69654c63 DB |
1164 | * drm_connector_set_panel_orientation() or |
1165 | * drm_connector_set_panel_orientation_with_quirk() | |
bbeba09f DV |
1166 | * |
1167 | * scaling mode: | |
1168 | * This property defines how a non-native mode is upscaled to the native | |
1169 | * mode of an LCD panel: | |
1170 | * | |
1171 | * None: | |
1172 | * No upscaling happens, scaling is left to the panel. Not all | |
1173 | * drivers expose this mode. | |
1174 | * Full: | |
1175 | * The output is upscaled to the full resolution of the panel, | |
1176 | * ignoring the aspect ratio. | |
1177 | * Center: | |
1178 | * No upscaling happens, the output is centered within the native | |
1179 | * resolution the panel. | |
1180 | * Full aspect: | |
1181 | * The output is upscaled to maximize either the width or height | |
1182 | * while retaining the aspect ratio. | |
1183 | * | |
1184 | * This property should be set up by calling | |
1185 | * drm_connector_attach_scaling_mode_property(). Note that drivers | |
1186 | * can also expose this property to external outputs, in which case they | |
1187 | * must support "None", which should be the default (since external screens | |
1188 | * have a built-in scaler). | |
4ada6f22 DV |
1189 | */ |
1190 | ||
52217195 DV |
1191 | int drm_connector_create_standard_properties(struct drm_device *dev) |
1192 | { | |
1193 | struct drm_property *prop; | |
1194 | ||
1195 | prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | | |
1196 | DRM_MODE_PROP_IMMUTABLE, | |
1197 | "EDID", 0); | |
1198 | if (!prop) | |
1199 | return -ENOMEM; | |
1200 | dev->mode_config.edid_property = prop; | |
1201 | ||
1202 | prop = drm_property_create_enum(dev, 0, | |
1203 | "DPMS", drm_dpms_enum_list, | |
1204 | ARRAY_SIZE(drm_dpms_enum_list)); | |
1205 | if (!prop) | |
1206 | return -ENOMEM; | |
1207 | dev->mode_config.dpms_property = prop; | |
1208 | ||
1209 | prop = drm_property_create(dev, | |
1210 | DRM_MODE_PROP_BLOB | | |
1211 | DRM_MODE_PROP_IMMUTABLE, | |
1212 | "PATH", 0); | |
1213 | if (!prop) | |
1214 | return -ENOMEM; | |
1215 | dev->mode_config.path_property = prop; | |
1216 | ||
1217 | prop = drm_property_create(dev, | |
1218 | DRM_MODE_PROP_BLOB | | |
1219 | DRM_MODE_PROP_IMMUTABLE, | |
1220 | "TILE", 0); | |
1221 | if (!prop) | |
1222 | return -ENOMEM; | |
1223 | dev->mode_config.tile_property = prop; | |
1224 | ||
40ee6fbe MN |
1225 | prop = drm_property_create_enum(dev, 0, "link-status", |
1226 | drm_link_status_enum_list, | |
1227 | ARRAY_SIZE(drm_link_status_enum_list)); | |
1228 | if (!prop) | |
1229 | return -ENOMEM; | |
1230 | dev->mode_config.link_status_property = prop; | |
1231 | ||
66660d4c DA |
1232 | prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop"); |
1233 | if (!prop) | |
1234 | return -ENOMEM; | |
1235 | dev->mode_config.non_desktop_property = prop; | |
1236 | ||
fbb5d035 US |
1237 | prop = drm_property_create(dev, DRM_MODE_PROP_BLOB, |
1238 | "HDR_OUTPUT_METADATA", 0); | |
1239 | if (!prop) | |
1240 | return -ENOMEM; | |
1241 | dev->mode_config.hdr_output_metadata_property = prop; | |
1242 | ||
52217195 DV |
1243 | return 0; |
1244 | } | |
1245 | ||
1246 | /** | |
1247 | * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties | |
1248 | * @dev: DRM device | |
1249 | * | |
1250 | * Called by a driver the first time a DVI-I connector is made. | |
1251 | */ | |
1252 | int drm_mode_create_dvi_i_properties(struct drm_device *dev) | |
1253 | { | |
1254 | struct drm_property *dvi_i_selector; | |
1255 | struct drm_property *dvi_i_subconnector; | |
1256 | ||
1257 | if (dev->mode_config.dvi_i_select_subconnector_property) | |
1258 | return 0; | |
1259 | ||
1260 | dvi_i_selector = | |
1261 | drm_property_create_enum(dev, 0, | |
1262 | "select subconnector", | |
1263 | drm_dvi_i_select_enum_list, | |
1264 | ARRAY_SIZE(drm_dvi_i_select_enum_list)); | |
1265 | dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; | |
1266 | ||
1267 | dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | |
1268 | "subconnector", | |
1269 | drm_dvi_i_subconnector_enum_list, | |
1270 | ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); | |
1271 | dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; | |
1272 | ||
1273 | return 0; | |
1274 | } | |
1275 | EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); | |
1276 | ||
50525c33 SL |
1277 | /** |
1278 | * DOC: HDMI connector properties | |
1279 | * | |
1280 | * content type (HDMI specific): | |
1281 | * Indicates content type setting to be used in HDMI infoframes to indicate | |
1e55a53a | 1282 | * content type for the external device, so that it adjusts its display |
50525c33 SL |
1283 | * settings accordingly. |
1284 | * | |
1285 | * The value of this property can be one of the following: | |
1286 | * | |
1287 | * No Data: | |
1288 | * Content type is unknown | |
1289 | * Graphics: | |
1290 | * Content type is graphics | |
1291 | * Photo: | |
1292 | * Content type is photo | |
1293 | * Cinema: | |
1294 | * Content type is cinema | |
1295 | * Game: | |
1296 | * Content type is game | |
1297 | * | |
1298 | * Drivers can set up this property by calling | |
1299 | * drm_connector_attach_content_type_property(). Decoding to | |
ba609631 | 1300 | * infoframe values is done through drm_hdmi_avi_infoframe_content_type(). |
50525c33 SL |
1301 | */ |
1302 | ||
1303 | /** | |
1304 | * drm_connector_attach_content_type_property - attach content-type property | |
1305 | * @connector: connector to attach content type property on. | |
1306 | * | |
1307 | * Called by a driver the first time a HDMI connector is made. | |
1308 | */ | |
1309 | int drm_connector_attach_content_type_property(struct drm_connector *connector) | |
1310 | { | |
1311 | if (!drm_mode_create_content_type_property(connector->dev)) | |
1312 | drm_object_attach_property(&connector->base, | |
1313 | connector->dev->mode_config.content_type_property, | |
1314 | DRM_MODE_CONTENT_TYPE_NO_DATA); | |
1315 | return 0; | |
1316 | } | |
1317 | EXPORT_SYMBOL(drm_connector_attach_content_type_property); | |
1318 | ||
1319 | ||
1320 | /** | |
1321 | * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe | |
1322 | * content type information, based | |
1323 | * on correspondent DRM property. | |
1324 | * @frame: HDMI AVI infoframe | |
1325 | * @conn_state: DRM display connector state | |
1326 | * | |
1327 | */ | |
1328 | void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame, | |
1329 | const struct drm_connector_state *conn_state) | |
1330 | { | |
1331 | switch (conn_state->content_type) { | |
1332 | case DRM_MODE_CONTENT_TYPE_GRAPHICS: | |
1333 | frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; | |
1334 | break; | |
1335 | case DRM_MODE_CONTENT_TYPE_CINEMA: | |
1336 | frame->content_type = HDMI_CONTENT_TYPE_CINEMA; | |
1337 | break; | |
1338 | case DRM_MODE_CONTENT_TYPE_GAME: | |
1339 | frame->content_type = HDMI_CONTENT_TYPE_GAME; | |
1340 | break; | |
1341 | case DRM_MODE_CONTENT_TYPE_PHOTO: | |
1342 | frame->content_type = HDMI_CONTENT_TYPE_PHOTO; | |
1343 | break; | |
1344 | default: | |
1345 | /* Graphics is the default(0) */ | |
1346 | frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; | |
1347 | } | |
1348 | ||
1349 | frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA; | |
1350 | } | |
1351 | EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type); | |
1352 | ||
52217195 | 1353 | /** |
6c4f52dc BB |
1354 | * drm_mode_attach_tv_margin_properties - attach TV connector margin properties |
1355 | * @connector: DRM connector | |
1356 | * | |
1357 | * Called by a driver when it needs to attach TV margin props to a connector. | |
1358 | * Typically used on SDTV and HDMI connectors. | |
1359 | */ | |
1360 | void drm_connector_attach_tv_margin_properties(struct drm_connector *connector) | |
1361 | { | |
1362 | struct drm_device *dev = connector->dev; | |
1363 | ||
1364 | drm_object_attach_property(&connector->base, | |
1365 | dev->mode_config.tv_left_margin_property, | |
1366 | 0); | |
1367 | drm_object_attach_property(&connector->base, | |
1368 | dev->mode_config.tv_right_margin_property, | |
1369 | 0); | |
1370 | drm_object_attach_property(&connector->base, | |
1371 | dev->mode_config.tv_top_margin_property, | |
1372 | 0); | |
1373 | drm_object_attach_property(&connector->base, | |
1374 | dev->mode_config.tv_bottom_margin_property, | |
1375 | 0); | |
1376 | } | |
1377 | EXPORT_SYMBOL(drm_connector_attach_tv_margin_properties); | |
1378 | ||
1379 | /** | |
1380 | * drm_mode_create_tv_margin_properties - create TV connector margin properties | |
1381 | * @dev: DRM device | |
1382 | * | |
1383 | * Called by a driver's HDMI connector initialization routine, this function | |
1384 | * creates the TV margin properties for a given device. No need to call this | |
1385 | * function for an SDTV connector, it's already called from | |
1386 | * drm_mode_create_tv_properties(). | |
1387 | */ | |
1388 | int drm_mode_create_tv_margin_properties(struct drm_device *dev) | |
1389 | { | |
1390 | if (dev->mode_config.tv_left_margin_property) | |
1391 | return 0; | |
1392 | ||
1393 | dev->mode_config.tv_left_margin_property = | |
1394 | drm_property_create_range(dev, 0, "left margin", 0, 100); | |
1395 | if (!dev->mode_config.tv_left_margin_property) | |
1396 | return -ENOMEM; | |
1397 | ||
1398 | dev->mode_config.tv_right_margin_property = | |
1399 | drm_property_create_range(dev, 0, "right margin", 0, 100); | |
1400 | if (!dev->mode_config.tv_right_margin_property) | |
1401 | return -ENOMEM; | |
1402 | ||
1403 | dev->mode_config.tv_top_margin_property = | |
1404 | drm_property_create_range(dev, 0, "top margin", 0, 100); | |
1405 | if (!dev->mode_config.tv_top_margin_property) | |
1406 | return -ENOMEM; | |
1407 | ||
1408 | dev->mode_config.tv_bottom_margin_property = | |
1409 | drm_property_create_range(dev, 0, "bottom margin", 0, 100); | |
1410 | if (!dev->mode_config.tv_bottom_margin_property) | |
1411 | return -ENOMEM; | |
1412 | ||
1413 | return 0; | |
1414 | } | |
1415 | EXPORT_SYMBOL(drm_mode_create_tv_margin_properties); | |
1416 | ||
52217195 | 1417 | /** |
eda6887f | 1418 | * drm_mode_create_tv_properties - create TV specific connector properties |
52217195 DV |
1419 | * @dev: DRM device |
1420 | * @num_modes: number of different TV formats (modes) supported | |
1421 | * @modes: array of pointers to strings containing name of each format | |
1422 | * | |
1423 | * Called by a driver's TV initialization routine, this function creates | |
1424 | * the TV specific connector properties for a given device. Caller is | |
1425 | * responsible for allocating a list of format names and passing them to | |
1426 | * this routine. | |
1427 | */ | |
1428 | int drm_mode_create_tv_properties(struct drm_device *dev, | |
1429 | unsigned int num_modes, | |
1430 | const char * const modes[]) | |
1431 | { | |
1432 | struct drm_property *tv_selector; | |
1433 | struct drm_property *tv_subconnector; | |
1434 | unsigned int i; | |
1435 | ||
1436 | if (dev->mode_config.tv_select_subconnector_property) | |
1437 | return 0; | |
1438 | ||
1439 | /* | |
1440 | * Basic connector properties | |
1441 | */ | |
1442 | tv_selector = drm_property_create_enum(dev, 0, | |
1443 | "select subconnector", | |
1444 | drm_tv_select_enum_list, | |
1445 | ARRAY_SIZE(drm_tv_select_enum_list)); | |
1446 | if (!tv_selector) | |
1447 | goto nomem; | |
1448 | ||
1449 | dev->mode_config.tv_select_subconnector_property = tv_selector; | |
1450 | ||
1451 | tv_subconnector = | |
1452 | drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | |
1453 | "subconnector", | |
1454 | drm_tv_subconnector_enum_list, | |
1455 | ARRAY_SIZE(drm_tv_subconnector_enum_list)); | |
1456 | if (!tv_subconnector) | |
1457 | goto nomem; | |
1458 | dev->mode_config.tv_subconnector_property = tv_subconnector; | |
1459 | ||
1460 | /* | |
1461 | * Other, TV specific properties: margins & TV modes. | |
1462 | */ | |
6c4f52dc | 1463 | if (drm_mode_create_tv_margin_properties(dev)) |
52217195 DV |
1464 | goto nomem; |
1465 | ||
1466 | dev->mode_config.tv_mode_property = | |
1467 | drm_property_create(dev, DRM_MODE_PROP_ENUM, | |
1468 | "mode", num_modes); | |
1469 | if (!dev->mode_config.tv_mode_property) | |
1470 | goto nomem; | |
1471 | ||
1472 | for (i = 0; i < num_modes; i++) | |
30e9db6d | 1473 | drm_property_add_enum(dev->mode_config.tv_mode_property, |
52217195 DV |
1474 | i, modes[i]); |
1475 | ||
1476 | dev->mode_config.tv_brightness_property = | |
1477 | drm_property_create_range(dev, 0, "brightness", 0, 100); | |
1478 | if (!dev->mode_config.tv_brightness_property) | |
1479 | goto nomem; | |
1480 | ||
1481 | dev->mode_config.tv_contrast_property = | |
1482 | drm_property_create_range(dev, 0, "contrast", 0, 100); | |
1483 | if (!dev->mode_config.tv_contrast_property) | |
1484 | goto nomem; | |
1485 | ||
1486 | dev->mode_config.tv_flicker_reduction_property = | |
1487 | drm_property_create_range(dev, 0, "flicker reduction", 0, 100); | |
1488 | if (!dev->mode_config.tv_flicker_reduction_property) | |
1489 | goto nomem; | |
1490 | ||
1491 | dev->mode_config.tv_overscan_property = | |
1492 | drm_property_create_range(dev, 0, "overscan", 0, 100); | |
1493 | if (!dev->mode_config.tv_overscan_property) | |
1494 | goto nomem; | |
1495 | ||
1496 | dev->mode_config.tv_saturation_property = | |
1497 | drm_property_create_range(dev, 0, "saturation", 0, 100); | |
1498 | if (!dev->mode_config.tv_saturation_property) | |
1499 | goto nomem; | |
1500 | ||
1501 | dev->mode_config.tv_hue_property = | |
1502 | drm_property_create_range(dev, 0, "hue", 0, 100); | |
1503 | if (!dev->mode_config.tv_hue_property) | |
1504 | goto nomem; | |
1505 | ||
1506 | return 0; | |
1507 | nomem: | |
1508 | return -ENOMEM; | |
1509 | } | |
1510 | EXPORT_SYMBOL(drm_mode_create_tv_properties); | |
1511 | ||
1512 | /** | |
1513 | * drm_mode_create_scaling_mode_property - create scaling mode property | |
1514 | * @dev: DRM device | |
1515 | * | |
1516 | * Called by a driver the first time it's needed, must be attached to desired | |
1517 | * connectors. | |
8f6e1e22 ML |
1518 | * |
1519 | * Atomic drivers should use drm_connector_attach_scaling_mode_property() | |
1520 | * instead to correctly assign &drm_connector_state.picture_aspect_ratio | |
1521 | * in the atomic state. | |
52217195 DV |
1522 | */ |
1523 | int drm_mode_create_scaling_mode_property(struct drm_device *dev) | |
1524 | { | |
1525 | struct drm_property *scaling_mode; | |
1526 | ||
1527 | if (dev->mode_config.scaling_mode_property) | |
1528 | return 0; | |
1529 | ||
1530 | scaling_mode = | |
1531 | drm_property_create_enum(dev, 0, "scaling mode", | |
1532 | drm_scaling_mode_enum_list, | |
1533 | ARRAY_SIZE(drm_scaling_mode_enum_list)); | |
1534 | ||
1535 | dev->mode_config.scaling_mode_property = scaling_mode; | |
1536 | ||
1537 | return 0; | |
1538 | } | |
1539 | EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); | |
1540 | ||
ab7a664f NK |
1541 | /** |
1542 | * DOC: Variable refresh properties | |
1543 | * | |
1544 | * Variable refresh rate capable displays can dynamically adjust their | |
1545 | * refresh rate by extending the duration of their vertical front porch | |
1546 | * until page flip or timeout occurs. This can reduce or remove stuttering | |
1547 | * and latency in scenarios where the page flip does not align with the | |
1548 | * vblank interval. | |
1549 | * | |
1550 | * An example scenario would be an application flipping at a constant rate | |
1551 | * of 48Hz on a 60Hz display. The page flip will frequently miss the vblank | |
1552 | * interval and the same contents will be displayed twice. This can be | |
1553 | * observed as stuttering for content with motion. | |
1554 | * | |
1555 | * If variable refresh rate was active on a display that supported a | |
1556 | * variable refresh range from 35Hz to 60Hz no stuttering would be observable | |
1557 | * for the example scenario. The minimum supported variable refresh rate of | |
1558 | * 35Hz is below the page flip frequency and the vertical front porch can | |
1559 | * be extended until the page flip occurs. The vblank interval will be | |
1560 | * directly aligned to the page flip rate. | |
1561 | * | |
1562 | * Not all userspace content is suitable for use with variable refresh rate. | |
1563 | * Large and frequent changes in vertical front porch duration may worsen | |
1564 | * perceived stuttering for input sensitive applications. | |
1565 | * | |
1566 | * Panel brightness will also vary with vertical front porch duration. Some | |
1567 | * panels may have noticeable differences in brightness between the minimum | |
1568 | * vertical front porch duration and the maximum vertical front porch duration. | |
1569 | * Large and frequent changes in vertical front porch duration may produce | |
1570 | * observable flickering for such panels. | |
1571 | * | |
1572 | * Userspace control for variable refresh rate is supported via properties | |
1573 | * on the &drm_connector and &drm_crtc objects. | |
1574 | * | |
1575 | * "vrr_capable": | |
1576 | * Optional &drm_connector boolean property that drivers should attach | |
1577 | * with drm_connector_attach_vrr_capable_property() on connectors that | |
1578 | * could support variable refresh rates. Drivers should update the | |
1579 | * property value by calling drm_connector_set_vrr_capable_property(). | |
1580 | * | |
1581 | * Absence of the property should indicate absence of support. | |
1582 | * | |
77086014 | 1583 | * "VRR_ENABLED": |
ab7a664f NK |
1584 | * Default &drm_crtc boolean property that notifies the driver that the |
1585 | * content on the CRTC is suitable for variable refresh rate presentation. | |
1586 | * The driver will take this property as a hint to enable variable | |
1587 | * refresh rate support if the receiver supports it, ie. if the | |
1588 | * "vrr_capable" property is true on the &drm_connector object. The | |
1589 | * vertical front porch duration will be extended until page-flip or | |
1590 | * timeout when enabled. | |
1591 | * | |
1592 | * The minimum vertical front porch duration is defined as the vertical | |
1593 | * front porch duration for the current mode. | |
1594 | * | |
1595 | * The maximum vertical front porch duration is greater than or equal to | |
1596 | * the minimum vertical front porch duration. The duration is derived | |
1597 | * from the minimum supported variable refresh rate for the connector. | |
1598 | * | |
1599 | * The driver may place further restrictions within these minimum | |
1600 | * and maximum bounds. | |
ab7a664f NK |
1601 | */ |
1602 | ||
ba1b0f6c NK |
1603 | /** |
1604 | * drm_connector_attach_vrr_capable_property - creates the | |
1605 | * vrr_capable property | |
1606 | * @connector: connector to create the vrr_capable property on. | |
1607 | * | |
1608 | * This is used by atomic drivers to add support for querying | |
1609 | * variable refresh rate capability for a connector. | |
1610 | * | |
1611 | * Returns: | |
1612 | * Zero on success, negative errono on failure. | |
1613 | */ | |
1614 | int drm_connector_attach_vrr_capable_property( | |
1615 | struct drm_connector *connector) | |
1616 | { | |
1617 | struct drm_device *dev = connector->dev; | |
1618 | struct drm_property *prop; | |
1619 | ||
1620 | if (!connector->vrr_capable_property) { | |
1621 | prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, | |
1622 | "vrr_capable"); | |
1623 | if (!prop) | |
1624 | return -ENOMEM; | |
1625 | ||
1626 | connector->vrr_capable_property = prop; | |
1627 | drm_object_attach_property(&connector->base, prop, 0); | |
1628 | } | |
1629 | ||
1630 | return 0; | |
1631 | } | |
1632 | EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property); | |
1633 | ||
8f6e1e22 ML |
1634 | /** |
1635 | * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property | |
1636 | * @connector: connector to attach scaling mode property on. | |
1637 | * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*). | |
1638 | * | |
1639 | * This is used to add support for scaling mode to atomic drivers. | |
1640 | * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio | |
1641 | * and can be used from &drm_connector_helper_funcs->atomic_check for validation. | |
1642 | * | |
1643 | * This is the atomic version of drm_mode_create_scaling_mode_property(). | |
1644 | * | |
1645 | * Returns: | |
1646 | * Zero on success, negative errno on failure. | |
1647 | */ | |
1648 | int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, | |
1649 | u32 scaling_mode_mask) | |
1650 | { | |
1651 | struct drm_device *dev = connector->dev; | |
1652 | struct drm_property *scaling_mode_property; | |
30e9db6d | 1653 | int i; |
8f6e1e22 ML |
1654 | const unsigned valid_scaling_mode_mask = |
1655 | (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1; | |
1656 | ||
1657 | if (WARN_ON(hweight32(scaling_mode_mask) < 2 || | |
1658 | scaling_mode_mask & ~valid_scaling_mode_mask)) | |
1659 | return -EINVAL; | |
1660 | ||
1661 | scaling_mode_property = | |
1662 | drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode", | |
1663 | hweight32(scaling_mode_mask)); | |
1664 | ||
1665 | if (!scaling_mode_property) | |
1666 | return -ENOMEM; | |
1667 | ||
1668 | for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) { | |
1669 | int ret; | |
1670 | ||
1671 | if (!(BIT(i) & scaling_mode_mask)) | |
1672 | continue; | |
1673 | ||
30e9db6d | 1674 | ret = drm_property_add_enum(scaling_mode_property, |
8f6e1e22 ML |
1675 | drm_scaling_mode_enum_list[i].type, |
1676 | drm_scaling_mode_enum_list[i].name); | |
1677 | ||
1678 | if (ret) { | |
1679 | drm_property_destroy(dev, scaling_mode_property); | |
1680 | ||
1681 | return ret; | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | drm_object_attach_property(&connector->base, | |
1686 | scaling_mode_property, 0); | |
1687 | ||
1688 | connector->scaling_mode_property = scaling_mode_property; | |
1689 | ||
1690 | return 0; | |
1691 | } | |
1692 | EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property); | |
1693 | ||
52217195 DV |
1694 | /** |
1695 | * drm_mode_create_aspect_ratio_property - create aspect ratio property | |
1696 | * @dev: DRM device | |
1697 | * | |
1698 | * Called by a driver the first time it's needed, must be attached to desired | |
1699 | * connectors. | |
1700 | * | |
1701 | * Returns: | |
1702 | * Zero on success, negative errno on failure. | |
1703 | */ | |
1704 | int drm_mode_create_aspect_ratio_property(struct drm_device *dev) | |
1705 | { | |
1706 | if (dev->mode_config.aspect_ratio_property) | |
1707 | return 0; | |
1708 | ||
1709 | dev->mode_config.aspect_ratio_property = | |
1710 | drm_property_create_enum(dev, 0, "aspect ratio", | |
1711 | drm_aspect_ratio_enum_list, | |
1712 | ARRAY_SIZE(drm_aspect_ratio_enum_list)); | |
1713 | ||
1714 | if (dev->mode_config.aspect_ratio_property == NULL) | |
1715 | return -ENOMEM; | |
1716 | ||
1717 | return 0; | |
1718 | } | |
1719 | EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); | |
1720 | ||
d2c6a405 US |
1721 | /** |
1722 | * DOC: standard connector properties | |
1723 | * | |
1724 | * Colorspace: | |
d2c6a405 US |
1725 | * This property helps select a suitable colorspace based on the sink |
1726 | * capability. Modern sink devices support wider gamut like BT2020. | |
1727 | * This helps switch to BT2020 mode if the BT2020 encoded video stream | |
1728 | * is being played by the user, same for any other colorspace. Thereby | |
1729 | * giving a good visual experience to users. | |
1730 | * | |
1731 | * The expectation from userspace is that it should parse the EDID | |
1732 | * and get supported colorspaces. Use this property and switch to the | |
1733 | * one supported. Sink supported colorspaces should be retrieved by | |
1734 | * userspace from EDID and driver will not explicitly expose them. | |
1735 | * | |
1736 | * Basically the expectation from userspace is: | |
1737 | * - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink | |
1738 | * colorspace | |
1739 | * - Set this new property to let the sink know what it | |
1740 | * converted the CRTC output to. | |
1741 | * - This property is just to inform sink what colorspace | |
1742 | * source is trying to drive. | |
1743 | * | |
8806cd3a | 1744 | * Because between HDMI and DP have different colorspaces, |
45cf0e91 GM |
1745 | * drm_mode_create_hdmi_colorspace_property() is used for HDMI connector and |
1746 | * drm_mode_create_dp_colorspace_property() is used for DP connector. | |
8806cd3a GM |
1747 | */ |
1748 | ||
1749 | /** | |
1750 | * drm_mode_create_hdmi_colorspace_property - create hdmi colorspace property | |
1751 | * @connector: connector to create the Colorspace property on. | |
1752 | * | |
d2c6a405 | 1753 | * Called by a driver the first time it's needed, must be attached to desired |
8806cd3a GM |
1754 | * HDMI connectors. |
1755 | * | |
1756 | * Returns: | |
1757 | * Zero on success, negative errono on failure. | |
d2c6a405 | 1758 | */ |
8806cd3a | 1759 | int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector) |
d2c6a405 US |
1760 | { |
1761 | struct drm_device *dev = connector->dev; | |
d2c6a405 | 1762 | |
8806cd3a | 1763 | if (connector->colorspace_property) |
d2c6a405 | 1764 | return 0; |
d2c6a405 | 1765 | |
8806cd3a GM |
1766 | connector->colorspace_property = |
1767 | drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace", | |
1768 | hdmi_colorspaces, | |
1769 | ARRAY_SIZE(hdmi_colorspaces)); | |
1770 | ||
1771 | if (!connector->colorspace_property) | |
1772 | return -ENOMEM; | |
d2c6a405 US |
1773 | |
1774 | return 0; | |
1775 | } | |
8806cd3a | 1776 | EXPORT_SYMBOL(drm_mode_create_hdmi_colorspace_property); |
d2c6a405 | 1777 | |
45cf0e91 GM |
1778 | /** |
1779 | * drm_mode_create_dp_colorspace_property - create dp colorspace property | |
1780 | * @connector: connector to create the Colorspace property on. | |
1781 | * | |
1782 | * Called by a driver the first time it's needed, must be attached to desired | |
1783 | * DP connectors. | |
1784 | * | |
1785 | * Returns: | |
1786 | * Zero on success, negative errono on failure. | |
1787 | */ | |
1788 | int drm_mode_create_dp_colorspace_property(struct drm_connector *connector) | |
1789 | { | |
1790 | struct drm_device *dev = connector->dev; | |
1791 | ||
1792 | if (connector->colorspace_property) | |
1793 | return 0; | |
1794 | ||
1795 | connector->colorspace_property = | |
1796 | drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace", | |
1797 | dp_colorspaces, | |
1798 | ARRAY_SIZE(dp_colorspaces)); | |
1799 | ||
1800 | if (!connector->colorspace_property) | |
1801 | return -ENOMEM; | |
d2c6a405 US |
1802 | |
1803 | return 0; | |
1804 | } | |
45cf0e91 | 1805 | EXPORT_SYMBOL(drm_mode_create_dp_colorspace_property); |
d2c6a405 | 1806 | |
50525c33 SL |
1807 | /** |
1808 | * drm_mode_create_content_type_property - create content type property | |
1809 | * @dev: DRM device | |
1810 | * | |
1811 | * Called by a driver the first time it's needed, must be attached to desired | |
1812 | * connectors. | |
1813 | * | |
1814 | * Returns: | |
1815 | * Zero on success, negative errno on failure. | |
1816 | */ | |
1817 | int drm_mode_create_content_type_property(struct drm_device *dev) | |
1818 | { | |
1819 | if (dev->mode_config.content_type_property) | |
1820 | return 0; | |
1821 | ||
1822 | dev->mode_config.content_type_property = | |
1823 | drm_property_create_enum(dev, 0, "content type", | |
1824 | drm_content_type_enum_list, | |
1825 | ARRAY_SIZE(drm_content_type_enum_list)); | |
1826 | ||
1827 | if (dev->mode_config.content_type_property == NULL) | |
1828 | return -ENOMEM; | |
1829 | ||
1830 | return 0; | |
1831 | } | |
1832 | EXPORT_SYMBOL(drm_mode_create_content_type_property); | |
1833 | ||
52217195 DV |
1834 | /** |
1835 | * drm_mode_create_suggested_offset_properties - create suggests offset properties | |
1836 | * @dev: DRM device | |
1837 | * | |
1838 | * Create the the suggested x/y offset property for connectors. | |
1839 | */ | |
1840 | int drm_mode_create_suggested_offset_properties(struct drm_device *dev) | |
1841 | { | |
1842 | if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) | |
1843 | return 0; | |
1844 | ||
1845 | dev->mode_config.suggested_x_property = | |
1846 | drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); | |
1847 | ||
1848 | dev->mode_config.suggested_y_property = | |
1849 | drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); | |
1850 | ||
1851 | if (dev->mode_config.suggested_x_property == NULL || | |
1852 | dev->mode_config.suggested_y_property == NULL) | |
1853 | return -ENOMEM; | |
1854 | return 0; | |
1855 | } | |
1856 | EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); | |
1857 | ||
1858 | /** | |
97e14fbe | 1859 | * drm_connector_set_path_property - set tile property on connector |
52217195 DV |
1860 | * @connector: connector to set property on. |
1861 | * @path: path to use for property; must not be NULL. | |
1862 | * | |
1863 | * This creates a property to expose to userspace to specify a | |
1864 | * connector path. This is mainly used for DisplayPort MST where | |
1865 | * connectors have a topology and we want to allow userspace to give | |
1866 | * them more meaningful names. | |
1867 | * | |
1868 | * Returns: | |
1869 | * Zero on success, negative errno on failure. | |
1870 | */ | |
97e14fbe DV |
1871 | int drm_connector_set_path_property(struct drm_connector *connector, |
1872 | const char *path) | |
52217195 DV |
1873 | { |
1874 | struct drm_device *dev = connector->dev; | |
1875 | int ret; | |
1876 | ||
1877 | ret = drm_property_replace_global_blob(dev, | |
1878 | &connector->path_blob_ptr, | |
1879 | strlen(path) + 1, | |
1880 | path, | |
1881 | &connector->base, | |
1882 | dev->mode_config.path_property); | |
1883 | return ret; | |
1884 | } | |
97e14fbe | 1885 | EXPORT_SYMBOL(drm_connector_set_path_property); |
52217195 DV |
1886 | |
1887 | /** | |
97e14fbe | 1888 | * drm_connector_set_tile_property - set tile property on connector |
52217195 DV |
1889 | * @connector: connector to set property on. |
1890 | * | |
1891 | * This looks up the tile information for a connector, and creates a | |
1892 | * property for userspace to parse if it exists. The property is of | |
1893 | * the form of 8 integers using ':' as a separator. | |
2de3a078 MN |
1894 | * This is used for dual port tiled displays with DisplayPort SST |
1895 | * or DisplayPort MST connectors. | |
52217195 DV |
1896 | * |
1897 | * Returns: | |
1898 | * Zero on success, errno on failure. | |
1899 | */ | |
97e14fbe | 1900 | int drm_connector_set_tile_property(struct drm_connector *connector) |
52217195 DV |
1901 | { |
1902 | struct drm_device *dev = connector->dev; | |
1903 | char tile[256]; | |
1904 | int ret; | |
1905 | ||
1906 | if (!connector->has_tile) { | |
1907 | ret = drm_property_replace_global_blob(dev, | |
1908 | &connector->tile_blob_ptr, | |
1909 | 0, | |
1910 | NULL, | |
1911 | &connector->base, | |
1912 | dev->mode_config.tile_property); | |
1913 | return ret; | |
1914 | } | |
1915 | ||
1916 | snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", | |
1917 | connector->tile_group->id, connector->tile_is_single_monitor, | |
1918 | connector->num_h_tile, connector->num_v_tile, | |
1919 | connector->tile_h_loc, connector->tile_v_loc, | |
1920 | connector->tile_h_size, connector->tile_v_size); | |
1921 | ||
1922 | ret = drm_property_replace_global_blob(dev, | |
1923 | &connector->tile_blob_ptr, | |
1924 | strlen(tile) + 1, | |
1925 | tile, | |
1926 | &connector->base, | |
1927 | dev->mode_config.tile_property); | |
1928 | return ret; | |
1929 | } | |
97e14fbe | 1930 | EXPORT_SYMBOL(drm_connector_set_tile_property); |
52217195 DV |
1931 | |
1932 | /** | |
c555f023 | 1933 | * drm_connector_update_edid_property - update the edid property of a connector |
52217195 DV |
1934 | * @connector: drm connector |
1935 | * @edid: new value of the edid property | |
1936 | * | |
1937 | * This function creates a new blob modeset object and assigns its id to the | |
1938 | * connector's edid property. | |
2de3a078 MN |
1939 | * Since we also parse tile information from EDID's displayID block, we also |
1940 | * set the connector's tile property here. See drm_connector_set_tile_property() | |
1941 | * for more details. | |
52217195 DV |
1942 | * |
1943 | * Returns: | |
1944 | * Zero on success, negative errno on failure. | |
1945 | */ | |
c555f023 | 1946 | int drm_connector_update_edid_property(struct drm_connector *connector, |
97e14fbe | 1947 | const struct edid *edid) |
52217195 DV |
1948 | { |
1949 | struct drm_device *dev = connector->dev; | |
1950 | size_t size = 0; | |
1951 | int ret; | |
1952 | ||
1953 | /* ignore requests to set edid when overridden */ | |
1954 | if (connector->override_edid) | |
1955 | return 0; | |
1956 | ||
1957 | if (edid) | |
1958 | size = EDID_LENGTH * (1 + edid->extensions); | |
1959 | ||
170178fe KP |
1960 | /* Set the display info, using edid if available, otherwise |
1961 | * reseting the values to defaults. This duplicates the work | |
1962 | * done in drm_add_edid_modes, but that function is not | |
1963 | * consistently called before this one in all drivers and the | |
1964 | * computation is cheap enough that it seems better to | |
1965 | * duplicate it rather than attempt to ensure some arbitrary | |
1966 | * ordering of calls. | |
1967 | */ | |
1968 | if (edid) | |
1969 | drm_add_display_info(connector, edid); | |
1970 | else | |
1971 | drm_reset_display_info(connector); | |
1972 | ||
66660d4c DA |
1973 | drm_object_property_set_value(&connector->base, |
1974 | dev->mode_config.non_desktop_property, | |
1975 | connector->display_info.non_desktop); | |
1976 | ||
52217195 DV |
1977 | ret = drm_property_replace_global_blob(dev, |
1978 | &connector->edid_blob_ptr, | |
1979 | size, | |
1980 | edid, | |
1981 | &connector->base, | |
1982 | dev->mode_config.edid_property); | |
2de3a078 MN |
1983 | if (ret) |
1984 | return ret; | |
1985 | return drm_connector_set_tile_property(connector); | |
52217195 | 1986 | } |
c555f023 | 1987 | EXPORT_SYMBOL(drm_connector_update_edid_property); |
52217195 | 1988 | |
40ee6fbe | 1989 | /** |
97e14fbe | 1990 | * drm_connector_set_link_status_property - Set link status property of a connector |
40ee6fbe MN |
1991 | * @connector: drm connector |
1992 | * @link_status: new value of link status property (0: Good, 1: Bad) | |
1993 | * | |
1994 | * In usual working scenario, this link status property will always be set to | |
1995 | * "GOOD". If something fails during or after a mode set, the kernel driver | |
1996 | * may set this link status property to "BAD". The caller then needs to send a | |
1997 | * hotplug uevent for userspace to re-check the valid modes through | |
1998 | * GET_CONNECTOR_IOCTL and retry modeset. | |
1999 | * | |
2000 | * Note: Drivers cannot rely on userspace to support this property and | |
2001 | * issue a modeset. As such, they may choose to handle issues (like | |
2002 | * re-training a link) without userspace's intervention. | |
2003 | * | |
2004 | * The reason for adding this property is to handle link training failures, but | |
2005 | * it is not limited to DP or link training. For example, if we implement | |
2006 | * asynchronous setcrtc, this property can be used to report any failures in that. | |
2007 | */ | |
97e14fbe DV |
2008 | void drm_connector_set_link_status_property(struct drm_connector *connector, |
2009 | uint64_t link_status) | |
40ee6fbe MN |
2010 | { |
2011 | struct drm_device *dev = connector->dev; | |
2012 | ||
2013 | drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); | |
2014 | connector->state->link_status = link_status; | |
2015 | drm_modeset_unlock(&dev->mode_config.connection_mutex); | |
2016 | } | |
97e14fbe | 2017 | EXPORT_SYMBOL(drm_connector_set_link_status_property); |
40ee6fbe | 2018 | |
47e22ff1 RS |
2019 | /** |
2020 | * drm_connector_attach_max_bpc_property - attach "max bpc" property | |
2021 | * @connector: connector to attach max bpc property on. | |
2022 | * @min: The minimum bit depth supported by the connector. | |
2023 | * @max: The maximum bit depth supported by the connector. | |
2024 | * | |
2025 | * This is used to add support for limiting the bit depth on a connector. | |
2026 | * | |
2027 | * Returns: | |
2028 | * Zero on success, negative errno on failure. | |
2029 | */ | |
2030 | int drm_connector_attach_max_bpc_property(struct drm_connector *connector, | |
2031 | int min, int max) | |
2032 | { | |
2033 | struct drm_device *dev = connector->dev; | |
2034 | struct drm_property *prop; | |
2035 | ||
2036 | prop = connector->max_bpc_property; | |
2037 | if (!prop) { | |
2038 | prop = drm_property_create_range(dev, 0, "max bpc", min, max); | |
2039 | if (!prop) | |
2040 | return -ENOMEM; | |
2041 | ||
2042 | connector->max_bpc_property = prop; | |
2043 | } | |
2044 | ||
2045 | drm_object_attach_property(&connector->base, prop, max); | |
2046 | connector->state->max_requested_bpc = max; | |
2047 | connector->state->max_bpc = max; | |
2048 | ||
2049 | return 0; | |
2050 | } | |
2051 | EXPORT_SYMBOL(drm_connector_attach_max_bpc_property); | |
2052 | ||
ba1b0f6c NK |
2053 | /** |
2054 | * drm_connector_set_vrr_capable_property - sets the variable refresh rate | |
2055 | * capable property for a connector | |
2056 | * @connector: drm connector | |
2057 | * @capable: True if the connector is variable refresh rate capable | |
2058 | * | |
2059 | * Should be used by atomic drivers to update the indicated support for | |
2060 | * variable refresh rate over a connector. | |
2061 | */ | |
2062 | void drm_connector_set_vrr_capable_property( | |
2063 | struct drm_connector *connector, bool capable) | |
2064 | { | |
2065 | drm_object_property_set_value(&connector->base, | |
2066 | connector->vrr_capable_property, | |
2067 | capable); | |
2068 | } | |
2069 | EXPORT_SYMBOL(drm_connector_set_vrr_capable_property); | |
2070 | ||
8d70f395 | 2071 | /** |
69654c63 DB |
2072 | * drm_connector_set_panel_orientation - sets the connecter's panel_orientation |
2073 | * @connector: connector for which to set the panel-orientation property. | |
2074 | * @panel_orientation: drm_panel_orientation value to set | |
2075 | * | |
2076 | * This function sets the connector's panel_orientation and attaches | |
2077 | * a "panel orientation" property to the connector. | |
8d70f395 | 2078 | * |
69654c63 DB |
2079 | * Calling this function on a connector where the panel_orientation has |
2080 | * already been set is a no-op (e.g. the orientation has been overridden with | |
2081 | * a kernel commandline option). | |
8d70f395 | 2082 | * |
69654c63 DB |
2083 | * It is allowed to call this function with a panel_orientation of |
2084 | * DRM_MODE_PANEL_ORIENTATION_UNKNOWN, in which case it is a no-op. | |
8d70f395 HG |
2085 | * |
2086 | * Returns: | |
2087 | * Zero on success, negative errno on failure. | |
2088 | */ | |
69654c63 DB |
2089 | int drm_connector_set_panel_orientation( |
2090 | struct drm_connector *connector, | |
2091 | enum drm_panel_orientation panel_orientation) | |
8d70f395 HG |
2092 | { |
2093 | struct drm_device *dev = connector->dev; | |
2094 | struct drm_display_info *info = &connector->display_info; | |
2095 | struct drm_property *prop; | |
8d70f395 | 2096 | |
69654c63 DB |
2097 | /* Already set? */ |
2098 | if (info->panel_orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) | |
2099 | return 0; | |
8d70f395 | 2100 | |
69654c63 DB |
2101 | /* Don't attach the property if the orientation is unknown */ |
2102 | if (panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN) | |
8d70f395 HG |
2103 | return 0; |
2104 | ||
69654c63 DB |
2105 | info->panel_orientation = panel_orientation; |
2106 | ||
8d70f395 HG |
2107 | prop = dev->mode_config.panel_orientation_property; |
2108 | if (!prop) { | |
2109 | prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | |
2110 | "panel orientation", | |
2111 | drm_panel_orientation_enum_list, | |
2112 | ARRAY_SIZE(drm_panel_orientation_enum_list)); | |
2113 | if (!prop) | |
2114 | return -ENOMEM; | |
2115 | ||
2116 | dev->mode_config.panel_orientation_property = prop; | |
2117 | } | |
2118 | ||
2119 | drm_object_attach_property(&connector->base, prop, | |
2120 | info->panel_orientation); | |
2121 | return 0; | |
2122 | } | |
69654c63 DB |
2123 | EXPORT_SYMBOL(drm_connector_set_panel_orientation); |
2124 | ||
2125 | /** | |
2126 | * drm_connector_set_panel_orientation_with_quirk - | |
2127 | * set the connecter's panel_orientation after checking for quirks | |
2128 | * @connector: connector for which to init the panel-orientation property. | |
2129 | * @panel_orientation: drm_panel_orientation value to set | |
2130 | * @width: width in pixels of the panel, used for panel quirk detection | |
2131 | * @height: height in pixels of the panel, used for panel quirk detection | |
2132 | * | |
2133 | * Like drm_connector_set_panel_orientation(), but with a check for platform | |
2134 | * specific (e.g. DMI based) quirks overriding the passed in panel_orientation. | |
2135 | * | |
2136 | * Returns: | |
2137 | * Zero on success, negative errno on failure. | |
2138 | */ | |
2139 | int drm_connector_set_panel_orientation_with_quirk( | |
2140 | struct drm_connector *connector, | |
2141 | enum drm_panel_orientation panel_orientation, | |
2142 | int width, int height) | |
2143 | { | |
2144 | int orientation_quirk; | |
2145 | ||
2146 | orientation_quirk = drm_get_panel_orientation_quirk(width, height); | |
2147 | if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) | |
2148 | panel_orientation = orientation_quirk; | |
2149 | ||
2150 | return drm_connector_set_panel_orientation(connector, | |
2151 | panel_orientation); | |
2152 | } | |
2153 | EXPORT_SYMBOL(drm_connector_set_panel_orientation_with_quirk); | |
8d70f395 | 2154 | |
97e14fbe | 2155 | int drm_connector_set_obj_prop(struct drm_mode_object *obj, |
52217195 DV |
2156 | struct drm_property *property, |
2157 | uint64_t value) | |
2158 | { | |
2159 | int ret = -EINVAL; | |
2160 | struct drm_connector *connector = obj_to_connector(obj); | |
2161 | ||
2162 | /* Do DPMS ourselves */ | |
2163 | if (property == connector->dev->mode_config.dpms_property) { | |
2164 | ret = (*connector->funcs->dpms)(connector, (int)value); | |
2165 | } else if (connector->funcs->set_property) | |
2166 | ret = connector->funcs->set_property(connector, property, value); | |
2167 | ||
144a7999 | 2168 | if (!ret) |
52217195 DV |
2169 | drm_object_property_set_value(&connector->base, property, value); |
2170 | return ret; | |
2171 | } | |
2172 | ||
97e14fbe DV |
2173 | int drm_connector_property_set_ioctl(struct drm_device *dev, |
2174 | void *data, struct drm_file *file_priv) | |
52217195 DV |
2175 | { |
2176 | struct drm_mode_connector_set_property *conn_set_prop = data; | |
2177 | struct drm_mode_obj_set_property obj_set_prop = { | |
2178 | .value = conn_set_prop->value, | |
2179 | .prop_id = conn_set_prop->prop_id, | |
2180 | .obj_id = conn_set_prop->connector_id, | |
2181 | .obj_type = DRM_MODE_OBJECT_CONNECTOR | |
2182 | }; | |
2183 | ||
2184 | /* It does all the locking and checking we need */ | |
2185 | return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); | |
2186 | } | |
2187 | ||
2188 | static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) | |
2189 | { | |
2190 | /* For atomic drivers only state objects are synchronously updated and | |
2191 | * protected by modeset locks, so check those first. */ | |
2192 | if (connector->state) | |
2193 | return connector->state->best_encoder; | |
2194 | return connector->encoder; | |
2195 | } | |
2196 | ||
c3ff0cdb AN |
2197 | static bool |
2198 | drm_mode_expose_to_userspace(const struct drm_display_mode *mode, | |
2199 | const struct list_head *export_list, | |
2200 | const struct drm_file *file_priv) | |
52217195 DV |
2201 | { |
2202 | /* | |
2203 | * If user-space hasn't configured the driver to expose the stereo 3D | |
2204 | * modes, don't expose them. | |
2205 | */ | |
2206 | if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) | |
2207 | return false; | |
c3ff0cdb AN |
2208 | /* |
2209 | * If user-space hasn't configured the driver to expose the modes | |
2210 | * with aspect-ratio, don't expose them. However if such a mode | |
2211 | * is unique, let it be exposed, but reset the aspect-ratio flags | |
2212 | * while preparing the list of user-modes. | |
2213 | */ | |
2214 | if (!file_priv->aspect_ratio_allowed) { | |
2215 | struct drm_display_mode *mode_itr; | |
2216 | ||
2217 | list_for_each_entry(mode_itr, export_list, export_head) | |
2218 | if (drm_mode_match(mode_itr, mode, | |
2219 | DRM_MODE_MATCH_TIMINGS | | |
2220 | DRM_MODE_MATCH_CLOCK | | |
2221 | DRM_MODE_MATCH_FLAGS | | |
2222 | DRM_MODE_MATCH_3D_FLAGS)) | |
2223 | return false; | |
2224 | } | |
52217195 DV |
2225 | |
2226 | return true; | |
2227 | } | |
2228 | ||
2229 | int drm_mode_getconnector(struct drm_device *dev, void *data, | |
2230 | struct drm_file *file_priv) | |
2231 | { | |
2232 | struct drm_mode_get_connector *out_resp = data; | |
2233 | struct drm_connector *connector; | |
2234 | struct drm_encoder *encoder; | |
2235 | struct drm_display_mode *mode; | |
2236 | int mode_count = 0; | |
2237 | int encoders_count = 0; | |
2238 | int ret = 0; | |
2239 | int copied = 0; | |
52217195 DV |
2240 | struct drm_mode_modeinfo u_mode; |
2241 | struct drm_mode_modeinfo __user *mode_ptr; | |
2242 | uint32_t __user *encoder_ptr; | |
c3ff0cdb | 2243 | LIST_HEAD(export_list); |
52217195 DV |
2244 | |
2245 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 2246 | return -EOPNOTSUPP; |
52217195 DV |
2247 | |
2248 | memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); | |
2249 | ||
418da172 | 2250 | connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id); |
91eefc05 DV |
2251 | if (!connector) |
2252 | return -ENOENT; | |
2253 | ||
62afb4ad | 2254 | encoders_count = hweight32(connector->possible_encoders); |
52217195 | 2255 | |
91eefc05 DV |
2256 | if ((out_resp->count_encoders >= encoders_count) && encoders_count) { |
2257 | copied = 0; | |
2258 | encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); | |
83aefbb8 | 2259 | |
62afb4ad | 2260 | drm_connector_for_each_possible_encoder(connector, encoder) { |
83aefbb8 VS |
2261 | if (put_user(encoder->base.id, encoder_ptr + copied)) { |
2262 | ret = -EFAULT; | |
2263 | goto out; | |
91eefc05 | 2264 | } |
83aefbb8 | 2265 | copied++; |
91eefc05 DV |
2266 | } |
2267 | } | |
2268 | out_resp->count_encoders = encoders_count; | |
2269 | ||
2270 | out_resp->connector_id = connector->base.id; | |
2271 | out_resp->connector_type = connector->connector_type; | |
2272 | out_resp->connector_type_id = connector->connector_type_id; | |
2273 | ||
2274 | mutex_lock(&dev->mode_config.mutex); | |
52217195 DV |
2275 | if (out_resp->count_modes == 0) { |
2276 | connector->funcs->fill_modes(connector, | |
2277 | dev->mode_config.max_width, | |
2278 | dev->mode_config.max_height); | |
2279 | } | |
2280 | ||
52217195 DV |
2281 | out_resp->mm_width = connector->display_info.width_mm; |
2282 | out_resp->mm_height = connector->display_info.height_mm; | |
2283 | out_resp->subpixel = connector->display_info.subpixel_order; | |
2284 | out_resp->connection = connector->status; | |
2285 | ||
91eefc05 DV |
2286 | /* delayed so we get modes regardless of pre-fill_modes state */ |
2287 | list_for_each_entry(mode, &connector->modes, head) | |
c3ff0cdb AN |
2288 | if (drm_mode_expose_to_userspace(mode, &export_list, |
2289 | file_priv)) { | |
2290 | list_add_tail(&mode->export_head, &export_list); | |
91eefc05 | 2291 | mode_count++; |
c3ff0cdb | 2292 | } |
52217195 DV |
2293 | |
2294 | /* | |
2295 | * This ioctl is called twice, once to determine how much space is | |
2296 | * needed, and the 2nd time to fill it. | |
c3ff0cdb AN |
2297 | * The modes that need to be exposed to the user are maintained in the |
2298 | * 'export_list'. When the ioctl is called first time to determine the, | |
2299 | * space, the export_list gets filled, to find the no.of modes. In the | |
2300 | * 2nd time, the user modes are filled, one by one from the export_list. | |
52217195 DV |
2301 | */ |
2302 | if ((out_resp->count_modes >= mode_count) && mode_count) { | |
2303 | copied = 0; | |
2304 | mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; | |
c3ff0cdb | 2305 | list_for_each_entry(mode, &export_list, export_head) { |
52217195 | 2306 | drm_mode_convert_to_umode(&u_mode, mode); |
c3ff0cdb AN |
2307 | /* |
2308 | * Reset aspect ratio flags of user-mode, if modes with | |
2309 | * aspect-ratio are not supported. | |
2310 | */ | |
2311 | if (!file_priv->aspect_ratio_allowed) | |
2312 | u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; | |
52217195 DV |
2313 | if (copy_to_user(mode_ptr + copied, |
2314 | &u_mode, sizeof(u_mode))) { | |
2315 | ret = -EFAULT; | |
e94ac351 DV |
2316 | mutex_unlock(&dev->mode_config.mutex); |
2317 | ||
52217195 DV |
2318 | goto out; |
2319 | } | |
2320 | copied++; | |
2321 | } | |
2322 | } | |
2323 | out_resp->count_modes = mode_count; | |
52217195 | 2324 | mutex_unlock(&dev->mode_config.mutex); |
e94ac351 DV |
2325 | |
2326 | drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); | |
2327 | encoder = drm_connector_get_encoder(connector); | |
2328 | if (encoder) | |
2329 | out_resp->encoder_id = encoder->base.id; | |
2330 | else | |
2331 | out_resp->encoder_id = 0; | |
2332 | ||
2333 | /* Only grab properties after probing, to make sure EDID and other | |
2334 | * properties reflect the latest status. */ | |
2335 | ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic, | |
2336 | (uint32_t __user *)(unsigned long)(out_resp->props_ptr), | |
2337 | (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), | |
2338 | &out_resp->count_props); | |
2339 | drm_modeset_unlock(&dev->mode_config.connection_mutex); | |
2340 | ||
2341 | out: | |
ad093607 | 2342 | drm_connector_put(connector); |
52217195 DV |
2343 | |
2344 | return ret; | |
2345 | } | |
2346 | ||
9498c19b DV |
2347 | |
2348 | /** | |
2349 | * DOC: Tile group | |
2350 | * | |
2351 | * Tile groups are used to represent tiled monitors with a unique integer | |
2352 | * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle, | |
2353 | * we store this in a tile group, so we have a common identifier for all tiles | |
2354 | * in a monitor group. The property is called "TILE". Drivers can manage tile | |
2355 | * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and | |
2356 | * drm_mode_get_tile_group(). But this is only needed for internal panels where | |
2357 | * the tile group information is exposed through a non-standard way. | |
2358 | */ | |
2359 | ||
2360 | static void drm_tile_group_free(struct kref *kref) | |
2361 | { | |
2362 | struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); | |
2363 | struct drm_device *dev = tg->dev; | |
2364 | mutex_lock(&dev->mode_config.idr_mutex); | |
2365 | idr_remove(&dev->mode_config.tile_idr, tg->id); | |
2366 | mutex_unlock(&dev->mode_config.idr_mutex); | |
2367 | kfree(tg); | |
2368 | } | |
2369 | ||
2370 | /** | |
2371 | * drm_mode_put_tile_group - drop a reference to a tile group. | |
2372 | * @dev: DRM device | |
2373 | * @tg: tile group to drop reference to. | |
2374 | * | |
2375 | * drop reference to tile group and free if 0. | |
2376 | */ | |
2377 | void drm_mode_put_tile_group(struct drm_device *dev, | |
2378 | struct drm_tile_group *tg) | |
2379 | { | |
2380 | kref_put(&tg->refcount, drm_tile_group_free); | |
2381 | } | |
2382 | EXPORT_SYMBOL(drm_mode_put_tile_group); | |
2383 | ||
2384 | /** | |
2385 | * drm_mode_get_tile_group - get a reference to an existing tile group | |
2386 | * @dev: DRM device | |
2387 | * @topology: 8-bytes unique per monitor. | |
2388 | * | |
2389 | * Use the unique bytes to get a reference to an existing tile group. | |
2390 | * | |
2391 | * RETURNS: | |
2392 | * tile group or NULL if not found. | |
2393 | */ | |
2394 | struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, | |
2395 | char topology[8]) | |
2396 | { | |
2397 | struct drm_tile_group *tg; | |
2398 | int id; | |
2399 | mutex_lock(&dev->mode_config.idr_mutex); | |
2400 | idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { | |
2401 | if (!memcmp(tg->group_data, topology, 8)) { | |
2402 | if (!kref_get_unless_zero(&tg->refcount)) | |
2403 | tg = NULL; | |
2404 | mutex_unlock(&dev->mode_config.idr_mutex); | |
2405 | return tg; | |
2406 | } | |
2407 | } | |
2408 | mutex_unlock(&dev->mode_config.idr_mutex); | |
2409 | return NULL; | |
2410 | } | |
2411 | EXPORT_SYMBOL(drm_mode_get_tile_group); | |
2412 | ||
2413 | /** | |
2414 | * drm_mode_create_tile_group - create a tile group from a displayid description | |
2415 | * @dev: DRM device | |
2416 | * @topology: 8-bytes unique per monitor. | |
2417 | * | |
2418 | * Create a tile group for the unique monitor, and get a unique | |
2419 | * identifier for the tile group. | |
2420 | * | |
2421 | * RETURNS: | |
705c8160 | 2422 | * new tile group or NULL. |
9498c19b DV |
2423 | */ |
2424 | struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, | |
2425 | char topology[8]) | |
2426 | { | |
2427 | struct drm_tile_group *tg; | |
2428 | int ret; | |
2429 | ||
2430 | tg = kzalloc(sizeof(*tg), GFP_KERNEL); | |
2431 | if (!tg) | |
705c8160 | 2432 | return NULL; |
9498c19b DV |
2433 | |
2434 | kref_init(&tg->refcount); | |
2435 | memcpy(tg->group_data, topology, 8); | |
2436 | tg->dev = dev; | |
2437 | ||
2438 | mutex_lock(&dev->mode_config.idr_mutex); | |
2439 | ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); | |
2440 | if (ret >= 0) { | |
2441 | tg->id = ret; | |
2442 | } else { | |
2443 | kfree(tg); | |
705c8160 | 2444 | tg = NULL; |
9498c19b DV |
2445 | } |
2446 | ||
2447 | mutex_unlock(&dev->mode_config.idr_mutex); | |
2448 | return tg; | |
2449 | } | |
2450 | EXPORT_SYMBOL(drm_mode_create_tile_group); |