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> | |
968d81a6 | 30 | #include <drm/drm_sysfs.h> |
99f45e32 DV |
31 | |
32 | #include <linux/uaccess.h> | |
52217195 DV |
33 | |
34 | #include "drm_crtc_internal.h" | |
35 | #include "drm_internal.h" | |
36 | ||
ae2a6da8 DV |
37 | /** |
38 | * DOC: overview | |
39 | * | |
40 | * In DRM connectors are the general abstraction for display sinks, and include | |
84e543bc | 41 | * also fixed panels or anything else that can display pixels in some form. As |
ae2a6da8 DV |
42 | * opposed to all other KMS objects representing hardware (like CRTC, encoder or |
43 | * plane abstractions) connectors can be hotplugged and unplugged at runtime. | |
ad093607 TR |
44 | * Hence they are reference-counted using drm_connector_get() and |
45 | * drm_connector_put(). | |
ae2a6da8 | 46 | * |
d574528a DV |
47 | * KMS driver must create, initialize, register and attach at a &struct |
48 | * drm_connector for each such sink. The instance is created as other KMS | |
aec97460 DV |
49 | * objects and initialized by setting the following fields. The connector is |
50 | * initialized with a call to drm_connector_init() with a pointer to the | |
51 | * &struct drm_connector_funcs and a connector type, and then exposed to | |
52 | * userspace with a call to drm_connector_register(). | |
ae2a6da8 DV |
53 | * |
54 | * Connectors must be attached to an encoder to be used. For devices that map | |
55 | * connectors to encoders 1:1, the connector should be attached at | |
cde4c44d | 56 | * initialization time with a call to drm_connector_attach_encoder(). The |
d574528a | 57 | * driver must also set the &drm_connector.encoder field to point to the |
ae2a6da8 DV |
58 | * attached encoder. |
59 | * | |
60 | * For connectors which are not fixed (like built-in panels) the driver needs to | |
61 | * support hotplug notifications. The simplest way to do that is by using the | |
62 | * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have | |
63 | * hardware support for hotplug interrupts. Connectors with hardware hotplug | |
64 | * support can instead use e.g. drm_helper_hpd_irq_event(). | |
65 | */ | |
66 | ||
52217195 DV |
67 | struct drm_conn_prop_enum_list { |
68 | int type; | |
69 | const char *name; | |
70 | struct ida ida; | |
71 | }; | |
72 | ||
73 | /* | |
74 | * Connector and encoder types. | |
75 | */ | |
76 | static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { | |
77 | { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, | |
78 | { DRM_MODE_CONNECTOR_VGA, "VGA" }, | |
79 | { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, | |
80 | { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, | |
81 | { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, | |
82 | { DRM_MODE_CONNECTOR_Composite, "Composite" }, | |
83 | { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, | |
84 | { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, | |
85 | { DRM_MODE_CONNECTOR_Component, "Component" }, | |
86 | { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, | |
87 | { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, | |
88 | { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, | |
89 | { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, | |
90 | { DRM_MODE_CONNECTOR_TV, "TV" }, | |
91 | { DRM_MODE_CONNECTOR_eDP, "eDP" }, | |
92 | { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, | |
93 | { DRM_MODE_CONNECTOR_DSI, "DSI" }, | |
94 | { DRM_MODE_CONNECTOR_DPI, "DPI" }, | |
935774cd | 95 | { DRM_MODE_CONNECTOR_WRITEBACK, "Writeback" }, |
fc06bf1d | 96 | { DRM_MODE_CONNECTOR_SPI, "SPI" }, |
52217195 DV |
97 | }; |
98 | ||
99 | void drm_connector_ida_init(void) | |
100 | { | |
101 | int i; | |
102 | ||
103 | for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) | |
104 | ida_init(&drm_connector_enum_list[i].ida); | |
105 | } | |
106 | ||
107 | void drm_connector_ida_destroy(void) | |
108 | { | |
109 | int i; | |
110 | ||
111 | for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) | |
112 | ida_destroy(&drm_connector_enum_list[i].ida); | |
113 | } | |
114 | ||
b35f90f2 LP |
115 | /** |
116 | * drm_get_connector_type_name - return a string for connector type | |
117 | * @type: The connector type (DRM_MODE_CONNECTOR_*) | |
118 | * | |
119 | * Returns: the name of the connector type, or NULL if the type is not valid. | |
120 | */ | |
121 | const char *drm_get_connector_type_name(unsigned int type) | |
122 | { | |
123 | if (type < ARRAY_SIZE(drm_connector_enum_list)) | |
124 | return drm_connector_enum_list[type].name; | |
125 | ||
126 | return NULL; | |
127 | } | |
128 | EXPORT_SYMBOL(drm_get_connector_type_name); | |
129 | ||
52217195 DV |
130 | /** |
131 | * drm_connector_get_cmdline_mode - reads the user's cmdline mode | |
84e543bc | 132 | * @connector: connector to query |
52217195 | 133 | * |
ae2a6da8 | 134 | * The kernel supports per-connector configuration of its consoles through |
52217195 DV |
135 | * use of the video= parameter. This function parses that option and |
136 | * extracts the user's specified mode (or enable/disable status) for a | |
137 | * particular connector. This is typically only used during the early fbdev | |
138 | * setup. | |
139 | */ | |
140 | static void drm_connector_get_cmdline_mode(struct drm_connector *connector) | |
141 | { | |
142 | struct drm_cmdline_mode *mode = &connector->cmdline_mode; | |
143 | char *option = NULL; | |
144 | ||
145 | if (fb_get_options(connector->name, &option)) | |
146 | return; | |
147 | ||
148 | if (!drm_mode_parse_command_line_for_connector(option, | |
149 | connector, | |
150 | mode)) | |
151 | return; | |
152 | ||
153 | if (mode->force) { | |
6140cf20 JN |
154 | DRM_INFO("forcing %s connector %s\n", connector->name, |
155 | drm_get_connector_force_name(mode->force)); | |
52217195 DV |
156 | connector->force = mode->force; |
157 | } | |
158 | ||
0980939d HG |
159 | if (mode->panel_orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) { |
160 | DRM_INFO("cmdline forces connector %s panel_orientation to %d\n", | |
161 | connector->name, mode->panel_orientation); | |
162 | drm_connector_set_panel_orientation(connector, | |
163 | mode->panel_orientation); | |
164 | } | |
165 | ||
3aeeb13d | 166 | DRM_DEBUG_KMS("cmdline mode for connector %s %s %dx%d@%dHz%s%s%s\n", |
50b0946d | 167 | connector->name, mode->name, |
52217195 DV |
168 | mode->xres, mode->yres, |
169 | mode->refresh_specified ? mode->refresh : 60, | |
170 | mode->rb ? " reduced blanking" : "", | |
171 | mode->margins ? " with margins" : "", | |
172 | mode->interlace ? " interlaced" : ""); | |
173 | } | |
174 | ||
175 | static void drm_connector_free(struct kref *kref) | |
176 | { | |
177 | struct drm_connector *connector = | |
178 | container_of(kref, struct drm_connector, base.refcount); | |
179 | struct drm_device *dev = connector->dev; | |
180 | ||
181 | drm_mode_object_unregister(dev, &connector->base); | |
182 | connector->funcs->destroy(connector); | |
183 | } | |
184 | ||
ea497bb9 | 185 | void drm_connector_free_work_fn(struct work_struct *work) |
a703c550 | 186 | { |
ea497bb9 DV |
187 | struct drm_connector *connector, *n; |
188 | struct drm_device *dev = | |
189 | container_of(work, struct drm_device, mode_config.connector_free_work); | |
190 | struct drm_mode_config *config = &dev->mode_config; | |
191 | unsigned long flags; | |
192 | struct llist_node *freed; | |
a703c550 | 193 | |
ea497bb9 DV |
194 | spin_lock_irqsave(&config->connector_list_lock, flags); |
195 | freed = llist_del_all(&config->connector_free_list); | |
196 | spin_unlock_irqrestore(&config->connector_list_lock, flags); | |
197 | ||
198 | llist_for_each_entry_safe(connector, n, freed, free_node) { | |
199 | drm_mode_object_unregister(dev, &connector->base); | |
200 | connector->funcs->destroy(connector); | |
201 | } | |
a703c550 DV |
202 | } |
203 | ||
52217195 DV |
204 | /** |
205 | * drm_connector_init - Init a preallocated connector | |
206 | * @dev: DRM device | |
207 | * @connector: the connector to init | |
208 | * @funcs: callbacks for this connector | |
209 | * @connector_type: user visible type of the connector | |
210 | * | |
211 | * Initialises a preallocated connector. Connectors should be | |
212 | * subclassed as part of driver connector objects. | |
213 | * | |
214 | * Returns: | |
215 | * Zero on success, error code on failure. | |
216 | */ | |
217 | int drm_connector_init(struct drm_device *dev, | |
218 | struct drm_connector *connector, | |
219 | const struct drm_connector_funcs *funcs, | |
220 | int connector_type) | |
221 | { | |
222 | struct drm_mode_config *config = &dev->mode_config; | |
223 | int ret; | |
224 | struct ida *connector_ida = | |
225 | &drm_connector_enum_list[connector_type].ida; | |
226 | ||
ba1f665f HM |
227 | WARN_ON(drm_drv_uses_atomic_modeset(dev) && |
228 | (!funcs->atomic_destroy_state || | |
229 | !funcs->atomic_duplicate_state)); | |
230 | ||
2135ea7a TR |
231 | ret = __drm_mode_object_add(dev, &connector->base, |
232 | DRM_MODE_OBJECT_CONNECTOR, | |
233 | false, drm_connector_free); | |
52217195 | 234 | if (ret) |
613051da | 235 | return ret; |
52217195 DV |
236 | |
237 | connector->base.properties = &connector->properties; | |
238 | connector->dev = dev; | |
239 | connector->funcs = funcs; | |
240 | ||
2a8d3eac VS |
241 | /* connector index is used with 32bit bitmasks */ |
242 | ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL); | |
243 | if (ret < 0) { | |
244 | DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n", | |
245 | drm_connector_enum_list[connector_type].name, | |
246 | ret); | |
52217195 | 247 | goto out_put; |
2a8d3eac | 248 | } |
52217195 DV |
249 | connector->index = ret; |
250 | ret = 0; | |
251 | ||
252 | connector->connector_type = connector_type; | |
253 | connector->connector_type_id = | |
254 | ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); | |
255 | if (connector->connector_type_id < 0) { | |
256 | ret = connector->connector_type_id; | |
257 | goto out_put_id; | |
258 | } | |
259 | connector->name = | |
260 | kasprintf(GFP_KERNEL, "%s-%d", | |
261 | drm_connector_enum_list[connector_type].name, | |
262 | connector->connector_type_id); | |
263 | if (!connector->name) { | |
264 | ret = -ENOMEM; | |
265 | goto out_put_type_id; | |
266 | } | |
267 | ||
268 | INIT_LIST_HEAD(&connector->probed_modes); | |
269 | INIT_LIST_HEAD(&connector->modes); | |
e73ab00e | 270 | mutex_init(&connector->mutex); |
52217195 | 271 | connector->edid_blob_ptr = NULL; |
2de3a078 | 272 | connector->tile_blob_ptr = NULL; |
52217195 | 273 | connector->status = connector_status_unknown; |
8d70f395 HG |
274 | connector->display_info.panel_orientation = |
275 | DRM_MODE_PANEL_ORIENTATION_UNKNOWN; | |
52217195 DV |
276 | |
277 | drm_connector_get_cmdline_mode(connector); | |
278 | ||
279 | /* We should add connectors at the end to avoid upsetting the connector | |
280 | * index too much. */ | |
613051da | 281 | spin_lock_irq(&config->connector_list_lock); |
52217195 DV |
282 | list_add_tail(&connector->head, &config->connector_list); |
283 | config->num_connector++; | |
613051da | 284 | spin_unlock_irq(&config->connector_list_lock); |
52217195 | 285 | |
935774cd BS |
286 | if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL && |
287 | connector_type != DRM_MODE_CONNECTOR_WRITEBACK) | |
6b7e2d5c | 288 | drm_connector_attach_edid_property(connector); |
52217195 DV |
289 | |
290 | drm_object_attach_property(&connector->base, | |
291 | config->dpms_property, 0); | |
292 | ||
40ee6fbe MN |
293 | drm_object_attach_property(&connector->base, |
294 | config->link_status_property, | |
295 | 0); | |
296 | ||
66660d4c DA |
297 | drm_object_attach_property(&connector->base, |
298 | config->non_desktop_property, | |
299 | 0); | |
2de3a078 MN |
300 | drm_object_attach_property(&connector->base, |
301 | config->tile_property, | |
302 | 0); | |
66660d4c | 303 | |
52217195 DV |
304 | if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { |
305 | drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); | |
306 | } | |
307 | ||
308 | connector->debugfs_entry = NULL; | |
309 | out_put_type_id: | |
310 | if (ret) | |
587680c1 | 311 | ida_simple_remove(connector_ida, connector->connector_type_id); |
52217195 DV |
312 | out_put_id: |
313 | if (ret) | |
587680c1 | 314 | ida_simple_remove(&config->connector_ida, connector->index); |
52217195 DV |
315 | out_put: |
316 | if (ret) | |
317 | drm_mode_object_unregister(dev, &connector->base); | |
318 | ||
52217195 DV |
319 | return ret; |
320 | } | |
321 | EXPORT_SYMBOL(drm_connector_init); | |
322 | ||
100163df AP |
323 | /** |
324 | * drm_connector_init_with_ddc - Init a preallocated connector | |
325 | * @dev: DRM device | |
326 | * @connector: the connector to init | |
327 | * @funcs: callbacks for this connector | |
328 | * @connector_type: user visible type of the connector | |
329 | * @ddc: pointer to the associated ddc adapter | |
330 | * | |
331 | * Initialises a preallocated connector. Connectors should be | |
332 | * subclassed as part of driver connector objects. | |
333 | * | |
334 | * Ensures that the ddc field of the connector is correctly set. | |
335 | * | |
336 | * Returns: | |
337 | * Zero on success, error code on failure. | |
338 | */ | |
339 | int drm_connector_init_with_ddc(struct drm_device *dev, | |
340 | struct drm_connector *connector, | |
341 | const struct drm_connector_funcs *funcs, | |
342 | int connector_type, | |
343 | struct i2c_adapter *ddc) | |
344 | { | |
345 | int ret; | |
346 | ||
347 | ret = drm_connector_init(dev, connector, funcs, connector_type); | |
348 | if (ret) | |
349 | return ret; | |
350 | ||
351 | /* provide ddc symlink in sysfs */ | |
352 | connector->ddc = ddc; | |
353 | ||
354 | return ret; | |
355 | } | |
356 | EXPORT_SYMBOL(drm_connector_init_with_ddc); | |
357 | ||
6b7e2d5c GH |
358 | /** |
359 | * drm_connector_attach_edid_property - attach edid property. | |
6b7e2d5c GH |
360 | * @connector: the connector |
361 | * | |
362 | * Some connector types like DRM_MODE_CONNECTOR_VIRTUAL do not get a | |
363 | * edid property attached by default. This function can be used to | |
364 | * explicitly enable the edid property in these cases. | |
365 | */ | |
366 | void drm_connector_attach_edid_property(struct drm_connector *connector) | |
367 | { | |
368 | struct drm_mode_config *config = &connector->dev->mode_config; | |
369 | ||
370 | drm_object_attach_property(&connector->base, | |
371 | config->edid_property, | |
372 | 0); | |
373 | } | |
374 | EXPORT_SYMBOL(drm_connector_attach_edid_property); | |
375 | ||
52217195 | 376 | /** |
cde4c44d | 377 | * drm_connector_attach_encoder - attach a connector to an encoder |
52217195 DV |
378 | * @connector: connector to attach |
379 | * @encoder: encoder to attach @connector to | |
380 | * | |
381 | * This function links up a connector to an encoder. Note that the routing | |
382 | * restrictions between encoders and crtcs are exposed to userspace through the | |
383 | * possible_clones and possible_crtcs bitmasks. | |
384 | * | |
385 | * Returns: | |
386 | * Zero on success, negative errno on failure. | |
387 | */ | |
cde4c44d DV |
388 | int drm_connector_attach_encoder(struct drm_connector *connector, |
389 | struct drm_encoder *encoder) | |
52217195 | 390 | { |
52217195 DV |
391 | /* |
392 | * In the past, drivers have attempted to model the static association | |
393 | * of connector to encoder in simple connector/encoder devices using a | |
394 | * direct assignment of connector->encoder = encoder. This connection | |
395 | * is a logical one and the responsibility of the core, so drivers are | |
396 | * expected not to mess with this. | |
397 | * | |
398 | * Note that the error return should've been enough here, but a large | |
399 | * majority of drivers ignores the return value, so add in a big WARN | |
400 | * to get people's attention. | |
401 | */ | |
402 | if (WARN_ON(connector->encoder)) | |
403 | return -EINVAL; | |
404 | ||
62afb4ad JRS |
405 | connector->possible_encoders |= drm_encoder_mask(encoder); |
406 | ||
407 | return 0; | |
52217195 | 408 | } |
cde4c44d | 409 | EXPORT_SYMBOL(drm_connector_attach_encoder); |
52217195 | 410 | |
38cb8d96 | 411 | /** |
62afb4ad JRS |
412 | * drm_connector_has_possible_encoder - check if the connector and encoder are |
413 | * associated with each other | |
38cb8d96 VS |
414 | * @connector: the connector |
415 | * @encoder: the encoder | |
416 | * | |
417 | * Returns: | |
418 | * True if @encoder is one of the possible encoders for @connector. | |
419 | */ | |
420 | bool drm_connector_has_possible_encoder(struct drm_connector *connector, | |
421 | struct drm_encoder *encoder) | |
422 | { | |
62afb4ad | 423 | return connector->possible_encoders & drm_encoder_mask(encoder); |
38cb8d96 VS |
424 | } |
425 | EXPORT_SYMBOL(drm_connector_has_possible_encoder); | |
426 | ||
52217195 DV |
427 | static void drm_mode_remove(struct drm_connector *connector, |
428 | struct drm_display_mode *mode) | |
429 | { | |
430 | list_del(&mode->head); | |
431 | drm_mode_destroy(connector->dev, mode); | |
432 | } | |
433 | ||
434 | /** | |
435 | * drm_connector_cleanup - cleans up an initialised connector | |
436 | * @connector: connector to cleanup | |
437 | * | |
438 | * Cleans up the connector but doesn't free the object. | |
439 | */ | |
440 | void drm_connector_cleanup(struct drm_connector *connector) | |
441 | { | |
442 | struct drm_device *dev = connector->dev; | |
443 | struct drm_display_mode *mode, *t; | |
444 | ||
445 | /* The connector should have been removed from userspace long before | |
446 | * it is finally destroyed. | |
447 | */ | |
39b50c60 LP |
448 | if (WARN_ON(connector->registration_state == |
449 | DRM_CONNECTOR_REGISTERED)) | |
52217195 DV |
450 | drm_connector_unregister(connector); |
451 | ||
452 | if (connector->tile_group) { | |
453 | drm_mode_put_tile_group(dev, connector->tile_group); | |
454 | connector->tile_group = NULL; | |
455 | } | |
456 | ||
457 | list_for_each_entry_safe(mode, t, &connector->probed_modes, head) | |
458 | drm_mode_remove(connector, mode); | |
459 | ||
460 | list_for_each_entry_safe(mode, t, &connector->modes, head) | |
461 | drm_mode_remove(connector, mode); | |
462 | ||
9a47dba1 CJ |
463 | ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida, |
464 | connector->connector_type_id); | |
52217195 | 465 | |
9a47dba1 CJ |
466 | ida_simple_remove(&dev->mode_config.connector_ida, |
467 | connector->index); | |
52217195 DV |
468 | |
469 | kfree(connector->display_info.bus_formats); | |
470 | drm_mode_object_unregister(dev, &connector->base); | |
471 | kfree(connector->name); | |
472 | connector->name = NULL; | |
613051da | 473 | spin_lock_irq(&dev->mode_config.connector_list_lock); |
52217195 DV |
474 | list_del(&connector->head); |
475 | dev->mode_config.num_connector--; | |
613051da | 476 | spin_unlock_irq(&dev->mode_config.connector_list_lock); |
52217195 DV |
477 | |
478 | WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); | |
479 | if (connector->state && connector->funcs->atomic_destroy_state) | |
480 | connector->funcs->atomic_destroy_state(connector, | |
481 | connector->state); | |
482 | ||
e73ab00e DV |
483 | mutex_destroy(&connector->mutex); |
484 | ||
52217195 DV |
485 | memset(connector, 0, sizeof(*connector)); |
486 | } | |
487 | EXPORT_SYMBOL(drm_connector_cleanup); | |
488 | ||
489 | /** | |
490 | * drm_connector_register - register a connector | |
491 | * @connector: the connector to register | |
492 | * | |
69b22f51 DV |
493 | * Register userspace interfaces for a connector. Only call this for connectors |
494 | * which can be hotplugged after drm_dev_register() has been called already, | |
495 | * e.g. DP MST connectors. All other connectors will be registered automatically | |
496 | * when calling drm_dev_register(). | |
52217195 DV |
497 | * |
498 | * Returns: | |
499 | * Zero on success, error code on failure. | |
500 | */ | |
501 | int drm_connector_register(struct drm_connector *connector) | |
502 | { | |
e73ab00e | 503 | int ret = 0; |
52217195 | 504 | |
e6e7b48b DV |
505 | if (!connector->dev->registered) |
506 | return 0; | |
507 | ||
e73ab00e | 508 | mutex_lock(&connector->mutex); |
39b50c60 | 509 | if (connector->registration_state != DRM_CONNECTOR_INITIALIZING) |
e73ab00e | 510 | goto unlock; |
52217195 DV |
511 | |
512 | ret = drm_sysfs_connector_add(connector); | |
513 | if (ret) | |
e73ab00e | 514 | goto unlock; |
52217195 | 515 | |
b792e640 | 516 | drm_debugfs_connector_add(connector); |
52217195 DV |
517 | |
518 | if (connector->funcs->late_register) { | |
519 | ret = connector->funcs->late_register(connector); | |
520 | if (ret) | |
521 | goto err_debugfs; | |
522 | } | |
523 | ||
524 | drm_mode_object_register(connector->dev, &connector->base); | |
525 | ||
39b50c60 | 526 | connector->registration_state = DRM_CONNECTOR_REGISTERED; |
968d81a6 JS |
527 | |
528 | /* Let userspace know we have a new connector */ | |
529 | drm_sysfs_hotplug_event(connector->dev); | |
530 | ||
e73ab00e | 531 | goto unlock; |
52217195 DV |
532 | |
533 | err_debugfs: | |
534 | drm_debugfs_connector_remove(connector); | |
52217195 | 535 | drm_sysfs_connector_remove(connector); |
e73ab00e DV |
536 | unlock: |
537 | mutex_unlock(&connector->mutex); | |
52217195 DV |
538 | return ret; |
539 | } | |
540 | EXPORT_SYMBOL(drm_connector_register); | |
541 | ||
542 | /** | |
543 | * drm_connector_unregister - unregister a connector | |
544 | * @connector: the connector to unregister | |
545 | * | |
69b22f51 DV |
546 | * Unregister userspace interfaces for a connector. Only call this for |
547 | * connectors which have registered explicitly by calling drm_dev_register(), | |
548 | * since connectors are unregistered automatically when drm_dev_unregister() is | |
549 | * called. | |
52217195 DV |
550 | */ |
551 | void drm_connector_unregister(struct drm_connector *connector) | |
552 | { | |
e73ab00e | 553 | mutex_lock(&connector->mutex); |
39b50c60 | 554 | if (connector->registration_state != DRM_CONNECTOR_REGISTERED) { |
e73ab00e | 555 | mutex_unlock(&connector->mutex); |
52217195 | 556 | return; |
e73ab00e | 557 | } |
52217195 DV |
558 | |
559 | if (connector->funcs->early_unregister) | |
560 | connector->funcs->early_unregister(connector); | |
561 | ||
562 | drm_sysfs_connector_remove(connector); | |
563 | drm_debugfs_connector_remove(connector); | |
564 | ||
39b50c60 | 565 | connector->registration_state = DRM_CONNECTOR_UNREGISTERED; |
e73ab00e | 566 | mutex_unlock(&connector->mutex); |
52217195 DV |
567 | } |
568 | EXPORT_SYMBOL(drm_connector_unregister); | |
569 | ||
570 | void drm_connector_unregister_all(struct drm_device *dev) | |
571 | { | |
572 | struct drm_connector *connector; | |
613051da | 573 | struct drm_connector_list_iter conn_iter; |
52217195 | 574 | |
b982dab1 | 575 | drm_connector_list_iter_begin(dev, &conn_iter); |
613051da | 576 | drm_for_each_connector_iter(connector, &conn_iter) |
52217195 | 577 | drm_connector_unregister(connector); |
b982dab1 | 578 | drm_connector_list_iter_end(&conn_iter); |
52217195 DV |
579 | } |
580 | ||
581 | int drm_connector_register_all(struct drm_device *dev) | |
582 | { | |
583 | struct drm_connector *connector; | |
613051da DV |
584 | struct drm_connector_list_iter conn_iter; |
585 | int ret = 0; | |
52217195 | 586 | |
b982dab1 | 587 | drm_connector_list_iter_begin(dev, &conn_iter); |
613051da | 588 | drm_for_each_connector_iter(connector, &conn_iter) { |
52217195 DV |
589 | ret = drm_connector_register(connector); |
590 | if (ret) | |
613051da | 591 | break; |
52217195 | 592 | } |
b982dab1 | 593 | drm_connector_list_iter_end(&conn_iter); |
52217195 | 594 | |
613051da DV |
595 | if (ret) |
596 | drm_connector_unregister_all(dev); | |
52217195 DV |
597 | return ret; |
598 | } | |
599 | ||
600 | /** | |
601 | * drm_get_connector_status_name - return a string for connector status | |
602 | * @status: connector status to compute name of | |
603 | * | |
604 | * In contrast to the other drm_get_*_name functions this one here returns a | |
605 | * const pointer and hence is threadsafe. | |
606 | */ | |
607 | const char *drm_get_connector_status_name(enum drm_connector_status status) | |
608 | { | |
609 | if (status == connector_status_connected) | |
610 | return "connected"; | |
611 | else if (status == connector_status_disconnected) | |
612 | return "disconnected"; | |
613 | else | |
614 | return "unknown"; | |
615 | } | |
616 | EXPORT_SYMBOL(drm_get_connector_status_name); | |
617 | ||
6140cf20 JN |
618 | /** |
619 | * drm_get_connector_force_name - return a string for connector force | |
620 | * @force: connector force to get name of | |
621 | * | |
622 | * Returns: const pointer to name. | |
623 | */ | |
624 | const char *drm_get_connector_force_name(enum drm_connector_force force) | |
625 | { | |
626 | switch (force) { | |
627 | case DRM_FORCE_UNSPECIFIED: | |
628 | return "unspecified"; | |
629 | case DRM_FORCE_OFF: | |
630 | return "off"; | |
631 | case DRM_FORCE_ON: | |
632 | return "on"; | |
633 | case DRM_FORCE_ON_DIGITAL: | |
634 | return "digital"; | |
635 | default: | |
636 | return "unknown"; | |
637 | } | |
638 | } | |
639 | ||
613051da DV |
640 | #ifdef CONFIG_LOCKDEP |
641 | static struct lockdep_map connector_list_iter_dep_map = { | |
642 | .name = "drm_connector_list_iter" | |
643 | }; | |
644 | #endif | |
645 | ||
646 | /** | |
b982dab1 | 647 | * drm_connector_list_iter_begin - initialize a connector_list iterator |
613051da DV |
648 | * @dev: DRM device |
649 | * @iter: connector_list iterator | |
650 | * | |
d574528a | 651 | * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter |
b982dab1 | 652 | * must always be cleaned up again by calling drm_connector_list_iter_end(). |
613051da DV |
653 | * Iteration itself happens using drm_connector_list_iter_next() or |
654 | * drm_for_each_connector_iter(). | |
655 | */ | |
b982dab1 TR |
656 | void drm_connector_list_iter_begin(struct drm_device *dev, |
657 | struct drm_connector_list_iter *iter) | |
613051da DV |
658 | { |
659 | iter->dev = dev; | |
660 | iter->conn = NULL; | |
661 | lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_); | |
662 | } | |
b982dab1 | 663 | EXPORT_SYMBOL(drm_connector_list_iter_begin); |
613051da | 664 | |
a703c550 DV |
665 | /* |
666 | * Extra-safe connector put function that works in any context. Should only be | |
667 | * used from the connector_iter functions, where we never really expect to | |
668 | * actually release the connector when dropping our final reference. | |
669 | */ | |
670 | static void | |
ea497bb9 | 671 | __drm_connector_put_safe(struct drm_connector *conn) |
a703c550 | 672 | { |
ea497bb9 DV |
673 | struct drm_mode_config *config = &conn->dev->mode_config; |
674 | ||
675 | lockdep_assert_held(&config->connector_list_lock); | |
676 | ||
677 | if (!refcount_dec_and_test(&conn->base.refcount.refcount)) | |
678 | return; | |
679 | ||
680 | llist_add(&conn->free_node, &config->connector_free_list); | |
681 | schedule_work(&config->connector_free_work); | |
a703c550 DV |
682 | } |
683 | ||
613051da DV |
684 | /** |
685 | * drm_connector_list_iter_next - return next connector | |
4f45c778 | 686 | * @iter: connector_list iterator |
613051da DV |
687 | * |
688 | * Returns the next connector for @iter, or NULL when the list walk has | |
689 | * completed. | |
690 | */ | |
691 | struct drm_connector * | |
692 | drm_connector_list_iter_next(struct drm_connector_list_iter *iter) | |
693 | { | |
694 | struct drm_connector *old_conn = iter->conn; | |
695 | struct drm_mode_config *config = &iter->dev->mode_config; | |
696 | struct list_head *lhead; | |
697 | unsigned long flags; | |
698 | ||
699 | spin_lock_irqsave(&config->connector_list_lock, flags); | |
700 | lhead = old_conn ? &old_conn->head : &config->connector_list; | |
701 | ||
702 | do { | |
703 | if (lhead->next == &config->connector_list) { | |
704 | iter->conn = NULL; | |
705 | break; | |
706 | } | |
707 | ||
708 | lhead = lhead->next; | |
709 | iter->conn = list_entry(lhead, struct drm_connector, head); | |
710 | ||
711 | /* loop until it's not a zombie connector */ | |
712 | } while (!kref_get_unless_zero(&iter->conn->base.refcount)); | |
613051da DV |
713 | |
714 | if (old_conn) | |
ea497bb9 DV |
715 | __drm_connector_put_safe(old_conn); |
716 | spin_unlock_irqrestore(&config->connector_list_lock, flags); | |
613051da DV |
717 | |
718 | return iter->conn; | |
719 | } | |
720 | EXPORT_SYMBOL(drm_connector_list_iter_next); | |
721 | ||
722 | /** | |
b982dab1 | 723 | * drm_connector_list_iter_end - tear down a connector_list iterator |
613051da DV |
724 | * @iter: connector_list iterator |
725 | * | |
726 | * Tears down @iter and releases any resources (like &drm_connector references) | |
727 | * acquired while walking the list. This must always be called, both when the | |
728 | * iteration completes fully or when it was aborted without walking the entire | |
729 | * list. | |
730 | */ | |
b982dab1 | 731 | void drm_connector_list_iter_end(struct drm_connector_list_iter *iter) |
613051da | 732 | { |
ea497bb9 DV |
733 | struct drm_mode_config *config = &iter->dev->mode_config; |
734 | unsigned long flags; | |
735 | ||
613051da | 736 | iter->dev = NULL; |
ea497bb9 DV |
737 | if (iter->conn) { |
738 | spin_lock_irqsave(&config->connector_list_lock, flags); | |
739 | __drm_connector_put_safe(iter->conn); | |
740 | spin_unlock_irqrestore(&config->connector_list_lock, flags); | |
741 | } | |
5facae4f | 742 | lock_release(&connector_list_iter_dep_map, _RET_IP_); |
613051da | 743 | } |
b982dab1 | 744 | EXPORT_SYMBOL(drm_connector_list_iter_end); |
613051da | 745 | |
52217195 DV |
746 | static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { |
747 | { SubPixelUnknown, "Unknown" }, | |
748 | { SubPixelHorizontalRGB, "Horizontal RGB" }, | |
749 | { SubPixelHorizontalBGR, "Horizontal BGR" }, | |
750 | { SubPixelVerticalRGB, "Vertical RGB" }, | |
751 | { SubPixelVerticalBGR, "Vertical BGR" }, | |
752 | { SubPixelNone, "None" }, | |
753 | }; | |
754 | ||
755 | /** | |
756 | * drm_get_subpixel_order_name - return a string for a given subpixel enum | |
757 | * @order: enum of subpixel_order | |
758 | * | |
759 | * Note you could abuse this and return something out of bounds, but that | |
760 | * would be a caller error. No unscrubbed user data should make it here. | |
761 | */ | |
762 | const char *drm_get_subpixel_order_name(enum subpixel_order order) | |
763 | { | |
764 | return drm_subpixel_enum_list[order].name; | |
765 | } | |
766 | EXPORT_SYMBOL(drm_get_subpixel_order_name); | |
767 | ||
768 | static const struct drm_prop_enum_list drm_dpms_enum_list[] = { | |
769 | { DRM_MODE_DPMS_ON, "On" }, | |
770 | { DRM_MODE_DPMS_STANDBY, "Standby" }, | |
771 | { DRM_MODE_DPMS_SUSPEND, "Suspend" }, | |
772 | { DRM_MODE_DPMS_OFF, "Off" } | |
773 | }; | |
774 | DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) | |
775 | ||
40ee6fbe MN |
776 | static const struct drm_prop_enum_list drm_link_status_enum_list[] = { |
777 | { DRM_MODE_LINK_STATUS_GOOD, "Good" }, | |
778 | { DRM_MODE_LINK_STATUS_BAD, "Bad" }, | |
779 | }; | |
40ee6fbe | 780 | |
b3c6c8bf DV |
781 | /** |
782 | * drm_display_info_set_bus_formats - set the supported bus formats | |
783 | * @info: display info to store bus formats in | |
784 | * @formats: array containing the supported bus formats | |
785 | * @num_formats: the number of entries in the fmts array | |
786 | * | |
787 | * Store the supported bus formats in display info structure. | |
788 | * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for | |
789 | * a full list of available formats. | |
790 | */ | |
791 | int drm_display_info_set_bus_formats(struct drm_display_info *info, | |
792 | const u32 *formats, | |
793 | unsigned int num_formats) | |
794 | { | |
795 | u32 *fmts = NULL; | |
796 | ||
797 | if (!formats && num_formats) | |
798 | return -EINVAL; | |
799 | ||
800 | if (formats && num_formats) { | |
801 | fmts = kmemdup(formats, sizeof(*formats) * num_formats, | |
802 | GFP_KERNEL); | |
803 | if (!fmts) | |
804 | return -ENOMEM; | |
805 | } | |
806 | ||
807 | kfree(info->bus_formats); | |
808 | info->bus_formats = fmts; | |
809 | info->num_bus_formats = num_formats; | |
810 | ||
811 | return 0; | |
812 | } | |
813 | EXPORT_SYMBOL(drm_display_info_set_bus_formats); | |
814 | ||
52217195 DV |
815 | /* Optional connector properties. */ |
816 | static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { | |
817 | { DRM_MODE_SCALE_NONE, "None" }, | |
818 | { DRM_MODE_SCALE_FULLSCREEN, "Full" }, | |
819 | { DRM_MODE_SCALE_CENTER, "Center" }, | |
820 | { DRM_MODE_SCALE_ASPECT, "Full aspect" }, | |
821 | }; | |
822 | ||
823 | static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { | |
824 | { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, | |
825 | { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, | |
826 | { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, | |
827 | }; | |
828 | ||
50525c33 SL |
829 | static const struct drm_prop_enum_list drm_content_type_enum_list[] = { |
830 | { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" }, | |
831 | { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" }, | |
832 | { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" }, | |
833 | { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" }, | |
834 | { DRM_MODE_CONTENT_TYPE_GAME, "Game" }, | |
835 | }; | |
836 | ||
8d70f395 HG |
837 | static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = { |
838 | { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" }, | |
839 | { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" }, | |
840 | { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" }, | |
841 | { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" }, | |
842 | }; | |
843 | ||
52217195 DV |
844 | static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { |
845 | { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ | |
846 | { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ | |
847 | { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ | |
848 | }; | |
849 | DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) | |
850 | ||
851 | static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { | |
852 | { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ | |
853 | { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ | |
854 | { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ | |
855 | }; | |
856 | DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, | |
857 | drm_dvi_i_subconnector_enum_list) | |
858 | ||
859 | static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { | |
860 | { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ | |
861 | { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ | |
862 | { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ | |
863 | { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ | |
864 | { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ | |
865 | }; | |
866 | DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) | |
867 | ||
868 | static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { | |
869 | { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ | |
870 | { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ | |
871 | { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ | |
872 | { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ | |
873 | { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ | |
874 | }; | |
875 | DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, | |
876 | drm_tv_subconnector_enum_list) | |
877 | ||
d2c6a405 US |
878 | static const struct drm_prop_enum_list hdmi_colorspaces[] = { |
879 | /* For Default case, driver will set the colorspace */ | |
880 | { DRM_MODE_COLORIMETRY_DEFAULT, "Default" }, | |
881 | /* Standard Definition Colorimetry based on CEA 861 */ | |
882 | { DRM_MODE_COLORIMETRY_SMPTE_170M_YCC, "SMPTE_170M_YCC" }, | |
883 | { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" }, | |
884 | /* Standard Definition Colorimetry based on IEC 61966-2-4 */ | |
885 | { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" }, | |
886 | /* High Definition Colorimetry based on IEC 61966-2-4 */ | |
887 | { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" }, | |
888 | /* Colorimetry based on IEC 61966-2-1/Amendment 1 */ | |
889 | { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" }, | |
890 | /* Colorimetry based on IEC 61966-2-5 [33] */ | |
891 | { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" }, | |
892 | /* Colorimetry based on IEC 61966-2-5 */ | |
893 | { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" }, | |
894 | /* Colorimetry based on ITU-R BT.2020 */ | |
895 | { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" }, | |
896 | /* Colorimetry based on ITU-R BT.2020 */ | |
897 | { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" }, | |
898 | /* Colorimetry based on ITU-R BT.2020 */ | |
899 | { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" }, | |
900 | /* Added as part of Additional Colorimetry Extension in 861.G */ | |
901 | { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" }, | |
902 | { DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-P3_RGB_Theater" }, | |
903 | }; | |
904 | ||
45cf0e91 GM |
905 | /* |
906 | * As per DP 1.4a spec, 2.2.5.7.5 VSC SDP Payload for Pixel Encoding/Colorimetry | |
907 | * Format Table 2-120 | |
908 | */ | |
909 | static const struct drm_prop_enum_list dp_colorspaces[] = { | |
910 | /* For Default case, driver will set the colorspace */ | |
911 | { DRM_MODE_COLORIMETRY_DEFAULT, "Default" }, | |
912 | { DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED, "RGB_Wide_Gamut_Fixed_Point" }, | |
913 | /* Colorimetry based on scRGB (IEC 61966-2-2) */ | |
914 | { DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT, "RGB_Wide_Gamut_Floating_Point" }, | |
915 | /* Colorimetry based on IEC 61966-2-5 */ | |
916 | { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" }, | |
917 | /* Colorimetry based on SMPTE RP 431-2 */ | |
918 | { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" }, | |
919 | /* Colorimetry based on ITU-R BT.2020 */ | |
920 | { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" }, | |
921 | { DRM_MODE_COLORIMETRY_BT601_YCC, "BT601_YCC" }, | |
922 | { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" }, | |
923 | /* Standard Definition Colorimetry based on IEC 61966-2-4 */ | |
924 | { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" }, | |
925 | /* High Definition Colorimetry based on IEC 61966-2-4 */ | |
926 | { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" }, | |
927 | /* Colorimetry based on IEC 61966-2-1/Amendment 1 */ | |
928 | { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" }, | |
929 | /* Colorimetry based on IEC 61966-2-5 [33] */ | |
930 | { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" }, | |
931 | /* Colorimetry based on ITU-R BT.2020 */ | |
932 | { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" }, | |
933 | /* Colorimetry based on ITU-R BT.2020 */ | |
934 | { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" }, | |
935 | }; | |
936 | ||
4ada6f22 DV |
937 | /** |
938 | * DOC: standard connector properties | |
939 | * | |
940 | * DRM connectors have a few standardized properties: | |
941 | * | |
942 | * EDID: | |
943 | * Blob property which contains the current EDID read from the sink. This | |
944 | * is useful to parse sink identification information like vendor, model | |
945 | * and serial. Drivers should update this property by calling | |
c555f023 | 946 | * drm_connector_update_edid_property(), usually after having parsed |
4ada6f22 DV |
947 | * the EDID using drm_add_edid_modes(). Userspace cannot change this |
948 | * property. | |
949 | * DPMS: | |
950 | * Legacy property for setting the power state of the connector. For atomic | |
951 | * drivers this is only provided for backwards compatibility with existing | |
952 | * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the | |
953 | * connector is linked to. Drivers should never set this property directly, | |
d574528a | 954 | * it is handled by the DRM core by calling the &drm_connector_funcs.dpms |
144a7999 | 955 | * callback. For atomic drivers the remapping to the "ACTIVE" property is |
1e3e4cae | 956 | * implemented in the DRM core. |
d0d1aee5 DV |
957 | * |
958 | * Note that this property cannot be set through the MODE_ATOMIC ioctl, | |
959 | * userspace must use "ACTIVE" on the CRTC instead. | |
960 | * | |
961 | * WARNING: | |
962 | * | |
963 | * For userspace also running on legacy drivers the "DPMS" semantics are a | |
964 | * lot more complicated. First, userspace cannot rely on the "DPMS" value | |
965 | * returned by the GETCONNECTOR actually reflecting reality, because many | |
966 | * drivers fail to update it. For atomic drivers this is taken care of in | |
967 | * drm_atomic_helper_update_legacy_modeset_state(). | |
968 | * | |
969 | * The second issue is that the DPMS state is only well-defined when the | |
970 | * connector is connected to a CRTC. In atomic the DRM core enforces that | |
971 | * "ACTIVE" is off in such a case, no such checks exists for "DPMS". | |
972 | * | |
973 | * Finally, when enabling an output using the legacy SETCONFIG ioctl then | |
974 | * "DPMS" is forced to ON. But see above, that might not be reflected in | |
975 | * the software value on legacy drivers. | |
976 | * | |
977 | * Summarizing: Only set "DPMS" when the connector is known to be enabled, | |
978 | * assume that a successful SETCONFIG call also sets "DPMS" to on, and | |
979 | * never read back the value of "DPMS" because it can be incorrect. | |
4ada6f22 DV |
980 | * PATH: |
981 | * Connector path property to identify how this sink is physically | |
982 | * connected. Used by DP MST. This should be set by calling | |
97e14fbe | 983 | * drm_connector_set_path_property(), in the case of DP MST with the |
4ada6f22 DV |
984 | * path property the MST manager created. Userspace cannot change this |
985 | * property. | |
986 | * TILE: | |
987 | * Connector tile group property to indicate how a set of DRM connector | |
988 | * compose together into one logical screen. This is used by both high-res | |
989 | * external screens (often only using a single cable, but exposing multiple | |
990 | * DP MST sinks), or high-res integrated panels (like dual-link DSI) which | |
991 | * are not gen-locked. Note that for tiled panels which are genlocked, like | |
992 | * dual-link LVDS or dual-link DSI, the driver should try to not expose the | |
84e543bc | 993 | * tiling and virtualise both &drm_crtc and &drm_plane if needed. Drivers |
97e14fbe | 994 | * should update this value using drm_connector_set_tile_property(). |
4ada6f22 | 995 | * Userspace cannot change this property. |
40ee6fbe | 996 | * link-status: |
716719a3 SP |
997 | * Connector link-status property to indicate the status of link. The |
998 | * default value of link-status is "GOOD". If something fails during or | |
999 | * after modeset, the kernel driver may set this to "BAD" and issue a | |
1000 | * hotplug uevent. Drivers should update this value using | |
97e14fbe | 1001 | * drm_connector_set_link_status_property(). |
a66da873 SS |
1002 | * |
1003 | * When user-space receives the hotplug uevent and detects a "BAD" | |
1004 | * link-status, the sink doesn't receive pixels anymore (e.g. the screen | |
1005 | * becomes completely black). The list of available modes may have | |
1006 | * changed. User-space is expected to pick a new mode if the current one | |
1007 | * has disappeared and perform a new modeset with link-status set to | |
1008 | * "GOOD" to re-enable the connector. | |
1009 | * | |
1010 | * If multiple connectors share the same CRTC and one of them gets a "BAD" | |
1011 | * link-status, the other are unaffected (ie. the sinks still continue to | |
1012 | * receive pixels). | |
1013 | * | |
1014 | * When user-space performs an atomic commit on a connector with a "BAD" | |
1015 | * link-status without resetting the property to "GOOD", the sink may | |
1016 | * still not receive pixels. When user-space performs an atomic commit | |
1017 | * which resets the link-status property to "GOOD" without the | |
1018 | * ALLOW_MODESET flag set, it might fail because a modeset is required. | |
1019 | * | |
1020 | * User-space can only change link-status to "GOOD", changing it to "BAD" | |
1021 | * is a no-op. | |
1022 | * | |
1023 | * For backwards compatibility with non-atomic userspace the kernel | |
1024 | * tries to automatically set the link-status back to "GOOD" in the | |
1025 | * SETCRTC IOCTL. This might fail if the mode is no longer valid, similar | |
1026 | * to how it might fail if a different screen has been connected in the | |
1027 | * interim. | |
66660d4c DA |
1028 | * non_desktop: |
1029 | * Indicates the output should be ignored for purposes of displaying a | |
1030 | * standard desktop environment or console. This is most likely because | |
1031 | * the output device is not rectilinear. | |
24557865 SP |
1032 | * Content Protection: |
1033 | * This property is used by userspace to request the kernel protect future | |
1034 | * content communicated over the link. When requested, kernel will apply | |
1035 | * the appropriate means of protection (most often HDCP), and use the | |
1036 | * property to tell userspace the protection is active. | |
1037 | * | |
1038 | * Drivers can set this up by calling | |
1039 | * drm_connector_attach_content_protection_property() on initialization. | |
1040 | * | |
1041 | * The value of this property can be one of the following: | |
1042 | * | |
bbeba09f | 1043 | * DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0 |
24557865 | 1044 | * The link is not protected, content is transmitted in the clear. |
bbeba09f | 1045 | * DRM_MODE_CONTENT_PROTECTION_DESIRED = 1 |
24557865 SP |
1046 | * Userspace has requested content protection, but the link is not |
1047 | * currently protected. When in this state, kernel should enable | |
1048 | * Content Protection as soon as possible. | |
bbeba09f | 1049 | * DRM_MODE_CONTENT_PROTECTION_ENABLED = 2 |
24557865 SP |
1050 | * Userspace has requested content protection, and the link is |
1051 | * protected. Only the driver can set the property to this value. | |
1052 | * If userspace attempts to set to ENABLED, kernel will return | |
1053 | * -EINVAL. | |
1054 | * | |
1055 | * A few guidelines: | |
1056 | * | |
1057 | * - DESIRED state should be preserved until userspace de-asserts it by | |
1058 | * setting the property to UNDESIRED. This means ENABLED should only | |
1059 | * transition to UNDESIRED when the user explicitly requests it. | |
1060 | * - If the state is DESIRED, kernel should attempt to re-authenticate the | |
1061 | * link whenever possible. This includes across disable/enable, dpms, | |
1062 | * hotplug, downstream device changes, link status failures, etc.. | |
bb5a45d4 R |
1063 | * - Kernel sends uevent with the connector id and property id through |
1064 | * @drm_hdcp_update_content_protection, upon below kernel triggered | |
1065 | * scenarios: | |
12db36bc SP |
1066 | * |
1067 | * - DESIRED -> ENABLED (authentication success) | |
1068 | * - ENABLED -> DESIRED (termination of authentication) | |
bb5a45d4 R |
1069 | * - Please note no uevents for userspace triggered property state changes, |
1070 | * which can't fail such as | |
12db36bc SP |
1071 | * |
1072 | * - DESIRED/ENABLED -> UNDESIRED | |
1073 | * - UNDESIRED -> DESIRED | |
bb5a45d4 R |
1074 | * - Userspace is responsible for polling the property or listen to uevents |
1075 | * to determine when the value transitions from ENABLED to DESIRED. | |
1076 | * This signifies the link is no longer protected and userspace should | |
1077 | * take appropriate action (whatever that might be). | |
4ada6f22 | 1078 | * |
7672dbba R |
1079 | * HDCP Content Type: |
1080 | * This Enum property is used by the userspace to declare the content type | |
1081 | * of the display stream, to kernel. Here display stream stands for any | |
1082 | * display content that userspace intended to display through HDCP | |
1083 | * encryption. | |
1084 | * | |
1085 | * Content Type of a stream is decided by the owner of the stream, as | |
1086 | * "HDCP Type0" or "HDCP Type1". | |
1087 | * | |
1088 | * The value of the property can be one of the below: | |
1089 | * - "HDCP Type0": DRM_MODE_HDCP_CONTENT_TYPE0 = 0 | |
1090 | * - "HDCP Type1": DRM_MODE_HDCP_CONTENT_TYPE1 = 1 | |
1091 | * | |
1092 | * When kernel starts the HDCP authentication (see "Content Protection" | |
1093 | * for details), it uses the content type in "HDCP Content Type" | |
1094 | * for performing the HDCP authentication with the display sink. | |
1095 | * | |
1096 | * Please note in HDCP spec versions, a link can be authenticated with | |
1097 | * HDCP 2.2 for Content Type 0/Content Type 1. Where as a link can be | |
1098 | * authenticated with HDCP1.4 only for Content Type 0(though it is implicit | |
1099 | * in nature. As there is no reference for Content Type in HDCP1.4). | |
1100 | * | |
1101 | * HDCP2.2 authentication protocol itself takes the "Content Type" as a | |
1102 | * parameter, which is a input for the DP HDCP2.2 encryption algo. | |
1103 | * | |
1104 | * In case of Type 0 content protection request, kernel driver can choose | |
1105 | * either of HDCP spec versions 1.4 and 2.2. When HDCP2.2 is used for | |
1106 | * "HDCP Type 0", a HDCP 2.2 capable repeater in the downstream can send | |
1107 | * that content to a HDCP 1.4 authenticated HDCP sink (Type0 link). | |
1108 | * But if the content is classified as "HDCP Type 1", above mentioned | |
1109 | * HDCP 2.2 repeater wont send the content to the HDCP sink as it can't | |
1110 | * authenticate the HDCP1.4 capable sink for "HDCP Type 1". | |
1111 | * | |
1112 | * Please note userspace can be ignorant of the HDCP versions used by the | |
1113 | * kernel driver to achieve the "HDCP Content Type". | |
1114 | * | |
1115 | * At current scenario, classifying a content as Type 1 ensures that the | |
1116 | * content will be displayed only through the HDCP2.2 encrypted link. | |
1117 | * | |
1118 | * Note that the HDCP Content Type property is introduced at HDCP 2.2, and | |
1119 | * defaults to type 0. It is only exposed by drivers supporting HDCP 2.2 | |
1120 | * (hence supporting Type 0 and Type 1). Based on how next versions of | |
1121 | * HDCP specs are defined content Type could be used for higher versions | |
1122 | * too. | |
1123 | * | |
1124 | * If content type is changed when "Content Protection" is not UNDESIRED, | |
1125 | * then kernel will disable the HDCP and re-enable with new type in the | |
1126 | * same atomic commit. And when "Content Protection" is ENABLED, it means | |
1127 | * that link is HDCP authenticated and encrypted, for the transmission of | |
1128 | * the Type of stream mentioned at "HDCP Content Type". | |
1129 | * | |
a09db883 US |
1130 | * HDR_OUTPUT_METADATA: |
1131 | * Connector property to enable userspace to send HDR Metadata to | |
1132 | * driver. This metadata is based on the composition and blending | |
1133 | * policies decided by user, taking into account the hardware and | |
1134 | * sink capabilities. The driver gets this metadata and creates a | |
1135 | * Dynamic Range and Mastering Infoframe (DRM) in case of HDMI, | |
1136 | * SDP packet (Non-audio INFOFRAME SDP v1.3) for DP. This is then | |
1137 | * sent to sink. This notifies the sink of the upcoming frame's Color | |
1138 | * Encoding and Luminance parameters. | |
1139 | * | |
1140 | * Userspace first need to detect the HDR capabilities of sink by | |
1141 | * reading and parsing the EDID. Details of HDR metadata for HDMI | |
1142 | * are added in CTA 861.G spec. For DP , its defined in VESA DP | |
1143 | * Standard v1.4. It needs to then get the metadata information | |
1144 | * of the video/game/app content which are encoded in HDR (basically | |
1145 | * using HDR transfer functions). With this information it needs to | |
1146 | * decide on a blending policy and compose the relevant | |
1147 | * layers/overlays into a common format. Once this blending is done, | |
1148 | * userspace will be aware of the metadata of the composed frame to | |
1149 | * be send to sink. It then uses this property to communicate this | |
1150 | * metadata to driver which then make a Infoframe packet and sends | |
1151 | * to sink based on the type of encoder connected. | |
1152 | * | |
1153 | * Userspace will be responsible to do Tone mapping operation in case: | |
1154 | * - Some layers are HDR and others are SDR | |
1155 | * - HDR layers luminance is not same as sink | |
9f9b2559 | 1156 | * |
a09db883 US |
1157 | * It will even need to do colorspace conversion and get all layers |
1158 | * to one common colorspace for blending. It can use either GL, Media | |
84e543bc | 1159 | * or display engine to get this done based on the capabilities of the |
a09db883 US |
1160 | * associated hardware. |
1161 | * | |
1162 | * Driver expects metadata to be put in &struct hdr_output_metadata | |
1163 | * structure from userspace. This is received as blob and stored in | |
1164 | * &drm_connector_state.hdr_output_metadata. It parses EDID and saves the | |
1165 | * sink metadata in &struct hdr_sink_metadata, as | |
1166 | * &drm_connector.hdr_sink_metadata. Driver uses | |
1167 | * drm_hdmi_infoframe_set_hdr_metadata() helper to set the HDR metadata, | |
1168 | * hdmi_drm_infoframe_pack() to pack the infoframe as per spec, in case of | |
1169 | * HDMI encoder. | |
1170 | * | |
47e22ff1 RS |
1171 | * max bpc: |
1172 | * This range property is used by userspace to limit the bit depth. When | |
1173 | * used the driver would limit the bpc in accordance with the valid range | |
1174 | * supported by the hardware and sink. Drivers to use the function | |
1175 | * drm_connector_attach_max_bpc_property() to create and attach the | |
1176 | * property to the connector during initialization. | |
1177 | * | |
4ada6f22 DV |
1178 | * Connectors also have one standardized atomic property: |
1179 | * | |
1180 | * CRTC_ID: | |
1181 | * Mode object ID of the &drm_crtc this connector should be connected to. | |
8d70f395 HG |
1182 | * |
1183 | * Connectors for LCD panels may also have one standardized property: | |
1184 | * | |
1185 | * panel orientation: | |
1186 | * On some devices the LCD panel is mounted in the casing in such a way | |
1187 | * that the up/top side of the panel does not match with the top side of | |
1188 | * the device. Userspace can use this property to check for this. | |
1189 | * Note that input coordinates from touchscreens (input devices with | |
1190 | * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel | |
1191 | * coordinates, so if userspace rotates the picture to adjust for | |
1192 | * the orientation it must also apply the same transformation to the | |
bbeba09f | 1193 | * touchscreen input coordinates. This property is initialized by calling |
69654c63 DB |
1194 | * drm_connector_set_panel_orientation() or |
1195 | * drm_connector_set_panel_orientation_with_quirk() | |
bbeba09f DV |
1196 | * |
1197 | * scaling mode: | |
1198 | * This property defines how a non-native mode is upscaled to the native | |
1199 | * mode of an LCD panel: | |
1200 | * | |
1201 | * None: | |
1202 | * No upscaling happens, scaling is left to the panel. Not all | |
1203 | * drivers expose this mode. | |
1204 | * Full: | |
1205 | * The output is upscaled to the full resolution of the panel, | |
1206 | * ignoring the aspect ratio. | |
1207 | * Center: | |
1208 | * No upscaling happens, the output is centered within the native | |
1209 | * resolution the panel. | |
1210 | * Full aspect: | |
1211 | * The output is upscaled to maximize either the width or height | |
1212 | * while retaining the aspect ratio. | |
1213 | * | |
1214 | * This property should be set up by calling | |
1215 | * drm_connector_attach_scaling_mode_property(). Note that drivers | |
1216 | * can also expose this property to external outputs, in which case they | |
1217 | * must support "None", which should be the default (since external screens | |
1218 | * have a built-in scaler). | |
4ada6f22 DV |
1219 | */ |
1220 | ||
52217195 DV |
1221 | int drm_connector_create_standard_properties(struct drm_device *dev) |
1222 | { | |
1223 | struct drm_property *prop; | |
1224 | ||
1225 | prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | | |
1226 | DRM_MODE_PROP_IMMUTABLE, | |
1227 | "EDID", 0); | |
1228 | if (!prop) | |
1229 | return -ENOMEM; | |
1230 | dev->mode_config.edid_property = prop; | |
1231 | ||
1232 | prop = drm_property_create_enum(dev, 0, | |
1233 | "DPMS", drm_dpms_enum_list, | |
1234 | ARRAY_SIZE(drm_dpms_enum_list)); | |
1235 | if (!prop) | |
1236 | return -ENOMEM; | |
1237 | dev->mode_config.dpms_property = prop; | |
1238 | ||
1239 | prop = drm_property_create(dev, | |
1240 | DRM_MODE_PROP_BLOB | | |
1241 | DRM_MODE_PROP_IMMUTABLE, | |
1242 | "PATH", 0); | |
1243 | if (!prop) | |
1244 | return -ENOMEM; | |
1245 | dev->mode_config.path_property = prop; | |
1246 | ||
1247 | prop = drm_property_create(dev, | |
1248 | DRM_MODE_PROP_BLOB | | |
1249 | DRM_MODE_PROP_IMMUTABLE, | |
1250 | "TILE", 0); | |
1251 | if (!prop) | |
1252 | return -ENOMEM; | |
1253 | dev->mode_config.tile_property = prop; | |
1254 | ||
40ee6fbe MN |
1255 | prop = drm_property_create_enum(dev, 0, "link-status", |
1256 | drm_link_status_enum_list, | |
1257 | ARRAY_SIZE(drm_link_status_enum_list)); | |
1258 | if (!prop) | |
1259 | return -ENOMEM; | |
1260 | dev->mode_config.link_status_property = prop; | |
1261 | ||
66660d4c DA |
1262 | prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop"); |
1263 | if (!prop) | |
1264 | return -ENOMEM; | |
1265 | dev->mode_config.non_desktop_property = prop; | |
1266 | ||
fbb5d035 US |
1267 | prop = drm_property_create(dev, DRM_MODE_PROP_BLOB, |
1268 | "HDR_OUTPUT_METADATA", 0); | |
1269 | if (!prop) | |
1270 | return -ENOMEM; | |
1271 | dev->mode_config.hdr_output_metadata_property = prop; | |
1272 | ||
52217195 DV |
1273 | return 0; |
1274 | } | |
1275 | ||
1276 | /** | |
1277 | * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties | |
1278 | * @dev: DRM device | |
1279 | * | |
1280 | * Called by a driver the first time a DVI-I connector is made. | |
1281 | */ | |
1282 | int drm_mode_create_dvi_i_properties(struct drm_device *dev) | |
1283 | { | |
1284 | struct drm_property *dvi_i_selector; | |
1285 | struct drm_property *dvi_i_subconnector; | |
1286 | ||
1287 | if (dev->mode_config.dvi_i_select_subconnector_property) | |
1288 | return 0; | |
1289 | ||
1290 | dvi_i_selector = | |
1291 | drm_property_create_enum(dev, 0, | |
1292 | "select subconnector", | |
1293 | drm_dvi_i_select_enum_list, | |
1294 | ARRAY_SIZE(drm_dvi_i_select_enum_list)); | |
1295 | dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; | |
1296 | ||
1297 | dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | |
1298 | "subconnector", | |
1299 | drm_dvi_i_subconnector_enum_list, | |
1300 | ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); | |
1301 | dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; | |
1302 | ||
1303 | return 0; | |
1304 | } | |
1305 | EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); | |
1306 | ||
50525c33 SL |
1307 | /** |
1308 | * DOC: HDMI connector properties | |
1309 | * | |
1310 | * content type (HDMI specific): | |
1311 | * Indicates content type setting to be used in HDMI infoframes to indicate | |
1e55a53a | 1312 | * content type for the external device, so that it adjusts its display |
50525c33 SL |
1313 | * settings accordingly. |
1314 | * | |
1315 | * The value of this property can be one of the following: | |
1316 | * | |
1317 | * No Data: | |
1318 | * Content type is unknown | |
1319 | * Graphics: | |
1320 | * Content type is graphics | |
1321 | * Photo: | |
1322 | * Content type is photo | |
1323 | * Cinema: | |
1324 | * Content type is cinema | |
1325 | * Game: | |
1326 | * Content type is game | |
1327 | * | |
1328 | * Drivers can set up this property by calling | |
1329 | * drm_connector_attach_content_type_property(). Decoding to | |
ba609631 | 1330 | * infoframe values is done through drm_hdmi_avi_infoframe_content_type(). |
50525c33 SL |
1331 | */ |
1332 | ||
1333 | /** | |
1334 | * drm_connector_attach_content_type_property - attach content-type property | |
1335 | * @connector: connector to attach content type property on. | |
1336 | * | |
1337 | * Called by a driver the first time a HDMI connector is made. | |
1338 | */ | |
1339 | int drm_connector_attach_content_type_property(struct drm_connector *connector) | |
1340 | { | |
1341 | if (!drm_mode_create_content_type_property(connector->dev)) | |
1342 | drm_object_attach_property(&connector->base, | |
1343 | connector->dev->mode_config.content_type_property, | |
1344 | DRM_MODE_CONTENT_TYPE_NO_DATA); | |
1345 | return 0; | |
1346 | } | |
1347 | EXPORT_SYMBOL(drm_connector_attach_content_type_property); | |
1348 | ||
1349 | ||
1350 | /** | |
1351 | * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe | |
1352 | * content type information, based | |
1353 | * on correspondent DRM property. | |
1354 | * @frame: HDMI AVI infoframe | |
1355 | * @conn_state: DRM display connector state | |
1356 | * | |
1357 | */ | |
1358 | void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame, | |
1359 | const struct drm_connector_state *conn_state) | |
1360 | { | |
1361 | switch (conn_state->content_type) { | |
1362 | case DRM_MODE_CONTENT_TYPE_GRAPHICS: | |
1363 | frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; | |
1364 | break; | |
1365 | case DRM_MODE_CONTENT_TYPE_CINEMA: | |
1366 | frame->content_type = HDMI_CONTENT_TYPE_CINEMA; | |
1367 | break; | |
1368 | case DRM_MODE_CONTENT_TYPE_GAME: | |
1369 | frame->content_type = HDMI_CONTENT_TYPE_GAME; | |
1370 | break; | |
1371 | case DRM_MODE_CONTENT_TYPE_PHOTO: | |
1372 | frame->content_type = HDMI_CONTENT_TYPE_PHOTO; | |
1373 | break; | |
1374 | default: | |
1375 | /* Graphics is the default(0) */ | |
1376 | frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; | |
1377 | } | |
1378 | ||
1379 | frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA; | |
1380 | } | |
1381 | EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type); | |
1382 | ||
52217195 | 1383 | /** |
6c4f52dc BB |
1384 | * drm_mode_attach_tv_margin_properties - attach TV connector margin properties |
1385 | * @connector: DRM connector | |
1386 | * | |
1387 | * Called by a driver when it needs to attach TV margin props to a connector. | |
1388 | * Typically used on SDTV and HDMI connectors. | |
1389 | */ | |
1390 | void drm_connector_attach_tv_margin_properties(struct drm_connector *connector) | |
1391 | { | |
1392 | struct drm_device *dev = connector->dev; | |
1393 | ||
1394 | drm_object_attach_property(&connector->base, | |
1395 | dev->mode_config.tv_left_margin_property, | |
1396 | 0); | |
1397 | drm_object_attach_property(&connector->base, | |
1398 | dev->mode_config.tv_right_margin_property, | |
1399 | 0); | |
1400 | drm_object_attach_property(&connector->base, | |
1401 | dev->mode_config.tv_top_margin_property, | |
1402 | 0); | |
1403 | drm_object_attach_property(&connector->base, | |
1404 | dev->mode_config.tv_bottom_margin_property, | |
1405 | 0); | |
1406 | } | |
1407 | EXPORT_SYMBOL(drm_connector_attach_tv_margin_properties); | |
1408 | ||
1409 | /** | |
1410 | * drm_mode_create_tv_margin_properties - create TV connector margin properties | |
1411 | * @dev: DRM device | |
1412 | * | |
1413 | * Called by a driver's HDMI connector initialization routine, this function | |
1414 | * creates the TV margin properties for a given device. No need to call this | |
1415 | * function for an SDTV connector, it's already called from | |
1416 | * drm_mode_create_tv_properties(). | |
1417 | */ | |
1418 | int drm_mode_create_tv_margin_properties(struct drm_device *dev) | |
1419 | { | |
1420 | if (dev->mode_config.tv_left_margin_property) | |
1421 | return 0; | |
1422 | ||
1423 | dev->mode_config.tv_left_margin_property = | |
1424 | drm_property_create_range(dev, 0, "left margin", 0, 100); | |
1425 | if (!dev->mode_config.tv_left_margin_property) | |
1426 | return -ENOMEM; | |
1427 | ||
1428 | dev->mode_config.tv_right_margin_property = | |
1429 | drm_property_create_range(dev, 0, "right margin", 0, 100); | |
1430 | if (!dev->mode_config.tv_right_margin_property) | |
1431 | return -ENOMEM; | |
1432 | ||
1433 | dev->mode_config.tv_top_margin_property = | |
1434 | drm_property_create_range(dev, 0, "top margin", 0, 100); | |
1435 | if (!dev->mode_config.tv_top_margin_property) | |
1436 | return -ENOMEM; | |
1437 | ||
1438 | dev->mode_config.tv_bottom_margin_property = | |
1439 | drm_property_create_range(dev, 0, "bottom margin", 0, 100); | |
1440 | if (!dev->mode_config.tv_bottom_margin_property) | |
1441 | return -ENOMEM; | |
1442 | ||
1443 | return 0; | |
1444 | } | |
1445 | EXPORT_SYMBOL(drm_mode_create_tv_margin_properties); | |
1446 | ||
52217195 | 1447 | /** |
eda6887f | 1448 | * drm_mode_create_tv_properties - create TV specific connector properties |
52217195 DV |
1449 | * @dev: DRM device |
1450 | * @num_modes: number of different TV formats (modes) supported | |
1451 | * @modes: array of pointers to strings containing name of each format | |
1452 | * | |
1453 | * Called by a driver's TV initialization routine, this function creates | |
1454 | * the TV specific connector properties for a given device. Caller is | |
1455 | * responsible for allocating a list of format names and passing them to | |
1456 | * this routine. | |
1457 | */ | |
1458 | int drm_mode_create_tv_properties(struct drm_device *dev, | |
1459 | unsigned int num_modes, | |
1460 | const char * const modes[]) | |
1461 | { | |
1462 | struct drm_property *tv_selector; | |
1463 | struct drm_property *tv_subconnector; | |
1464 | unsigned int i; | |
1465 | ||
1466 | if (dev->mode_config.tv_select_subconnector_property) | |
1467 | return 0; | |
1468 | ||
1469 | /* | |
1470 | * Basic connector properties | |
1471 | */ | |
1472 | tv_selector = drm_property_create_enum(dev, 0, | |
1473 | "select subconnector", | |
1474 | drm_tv_select_enum_list, | |
1475 | ARRAY_SIZE(drm_tv_select_enum_list)); | |
1476 | if (!tv_selector) | |
1477 | goto nomem; | |
1478 | ||
1479 | dev->mode_config.tv_select_subconnector_property = tv_selector; | |
1480 | ||
1481 | tv_subconnector = | |
1482 | drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | |
1483 | "subconnector", | |
1484 | drm_tv_subconnector_enum_list, | |
1485 | ARRAY_SIZE(drm_tv_subconnector_enum_list)); | |
1486 | if (!tv_subconnector) | |
1487 | goto nomem; | |
1488 | dev->mode_config.tv_subconnector_property = tv_subconnector; | |
1489 | ||
1490 | /* | |
1491 | * Other, TV specific properties: margins & TV modes. | |
1492 | */ | |
6c4f52dc | 1493 | if (drm_mode_create_tv_margin_properties(dev)) |
52217195 DV |
1494 | goto nomem; |
1495 | ||
1496 | dev->mode_config.tv_mode_property = | |
1497 | drm_property_create(dev, DRM_MODE_PROP_ENUM, | |
1498 | "mode", num_modes); | |
1499 | if (!dev->mode_config.tv_mode_property) | |
1500 | goto nomem; | |
1501 | ||
1502 | for (i = 0; i < num_modes; i++) | |
30e9db6d | 1503 | drm_property_add_enum(dev->mode_config.tv_mode_property, |
52217195 DV |
1504 | i, modes[i]); |
1505 | ||
1506 | dev->mode_config.tv_brightness_property = | |
1507 | drm_property_create_range(dev, 0, "brightness", 0, 100); | |
1508 | if (!dev->mode_config.tv_brightness_property) | |
1509 | goto nomem; | |
1510 | ||
1511 | dev->mode_config.tv_contrast_property = | |
1512 | drm_property_create_range(dev, 0, "contrast", 0, 100); | |
1513 | if (!dev->mode_config.tv_contrast_property) | |
1514 | goto nomem; | |
1515 | ||
1516 | dev->mode_config.tv_flicker_reduction_property = | |
1517 | drm_property_create_range(dev, 0, "flicker reduction", 0, 100); | |
1518 | if (!dev->mode_config.tv_flicker_reduction_property) | |
1519 | goto nomem; | |
1520 | ||
1521 | dev->mode_config.tv_overscan_property = | |
1522 | drm_property_create_range(dev, 0, "overscan", 0, 100); | |
1523 | if (!dev->mode_config.tv_overscan_property) | |
1524 | goto nomem; | |
1525 | ||
1526 | dev->mode_config.tv_saturation_property = | |
1527 | drm_property_create_range(dev, 0, "saturation", 0, 100); | |
1528 | if (!dev->mode_config.tv_saturation_property) | |
1529 | goto nomem; | |
1530 | ||
1531 | dev->mode_config.tv_hue_property = | |
1532 | drm_property_create_range(dev, 0, "hue", 0, 100); | |
1533 | if (!dev->mode_config.tv_hue_property) | |
1534 | goto nomem; | |
1535 | ||
1536 | return 0; | |
1537 | nomem: | |
1538 | return -ENOMEM; | |
1539 | } | |
1540 | EXPORT_SYMBOL(drm_mode_create_tv_properties); | |
1541 | ||
1542 | /** | |
1543 | * drm_mode_create_scaling_mode_property - create scaling mode property | |
1544 | * @dev: DRM device | |
1545 | * | |
1546 | * Called by a driver the first time it's needed, must be attached to desired | |
1547 | * connectors. | |
8f6e1e22 ML |
1548 | * |
1549 | * Atomic drivers should use drm_connector_attach_scaling_mode_property() | |
1550 | * instead to correctly assign &drm_connector_state.picture_aspect_ratio | |
1551 | * in the atomic state. | |
52217195 DV |
1552 | */ |
1553 | int drm_mode_create_scaling_mode_property(struct drm_device *dev) | |
1554 | { | |
1555 | struct drm_property *scaling_mode; | |
1556 | ||
1557 | if (dev->mode_config.scaling_mode_property) | |
1558 | return 0; | |
1559 | ||
1560 | scaling_mode = | |
1561 | drm_property_create_enum(dev, 0, "scaling mode", | |
1562 | drm_scaling_mode_enum_list, | |
1563 | ARRAY_SIZE(drm_scaling_mode_enum_list)); | |
1564 | ||
1565 | dev->mode_config.scaling_mode_property = scaling_mode; | |
1566 | ||
1567 | return 0; | |
1568 | } | |
1569 | EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); | |
1570 | ||
ab7a664f NK |
1571 | /** |
1572 | * DOC: Variable refresh properties | |
1573 | * | |
1574 | * Variable refresh rate capable displays can dynamically adjust their | |
1575 | * refresh rate by extending the duration of their vertical front porch | |
1576 | * until page flip or timeout occurs. This can reduce or remove stuttering | |
1577 | * and latency in scenarios where the page flip does not align with the | |
1578 | * vblank interval. | |
1579 | * | |
1580 | * An example scenario would be an application flipping at a constant rate | |
1581 | * of 48Hz on a 60Hz display. The page flip will frequently miss the vblank | |
1582 | * interval and the same contents will be displayed twice. This can be | |
1583 | * observed as stuttering for content with motion. | |
1584 | * | |
1585 | * If variable refresh rate was active on a display that supported a | |
1586 | * variable refresh range from 35Hz to 60Hz no stuttering would be observable | |
1587 | * for the example scenario. The minimum supported variable refresh rate of | |
1588 | * 35Hz is below the page flip frequency and the vertical front porch can | |
1589 | * be extended until the page flip occurs. The vblank interval will be | |
1590 | * directly aligned to the page flip rate. | |
1591 | * | |
1592 | * Not all userspace content is suitable for use with variable refresh rate. | |
1593 | * Large and frequent changes in vertical front porch duration may worsen | |
1594 | * perceived stuttering for input sensitive applications. | |
1595 | * | |
1596 | * Panel brightness will also vary with vertical front porch duration. Some | |
1597 | * panels may have noticeable differences in brightness between the minimum | |
1598 | * vertical front porch duration and the maximum vertical front porch duration. | |
1599 | * Large and frequent changes in vertical front porch duration may produce | |
1600 | * observable flickering for such panels. | |
1601 | * | |
1602 | * Userspace control for variable refresh rate is supported via properties | |
1603 | * on the &drm_connector and &drm_crtc objects. | |
1604 | * | |
1605 | * "vrr_capable": | |
1606 | * Optional &drm_connector boolean property that drivers should attach | |
1607 | * with drm_connector_attach_vrr_capable_property() on connectors that | |
1608 | * could support variable refresh rates. Drivers should update the | |
1609 | * property value by calling drm_connector_set_vrr_capable_property(). | |
1610 | * | |
1611 | * Absence of the property should indicate absence of support. | |
1612 | * | |
77086014 | 1613 | * "VRR_ENABLED": |
ab7a664f NK |
1614 | * Default &drm_crtc boolean property that notifies the driver that the |
1615 | * content on the CRTC is suitable for variable refresh rate presentation. | |
1616 | * The driver will take this property as a hint to enable variable | |
1617 | * refresh rate support if the receiver supports it, ie. if the | |
1618 | * "vrr_capable" property is true on the &drm_connector object. The | |
1619 | * vertical front porch duration will be extended until page-flip or | |
1620 | * timeout when enabled. | |
1621 | * | |
1622 | * The minimum vertical front porch duration is defined as the vertical | |
1623 | * front porch duration for the current mode. | |
1624 | * | |
1625 | * The maximum vertical front porch duration is greater than or equal to | |
1626 | * the minimum vertical front porch duration. The duration is derived | |
1627 | * from the minimum supported variable refresh rate for the connector. | |
1628 | * | |
1629 | * The driver may place further restrictions within these minimum | |
1630 | * and maximum bounds. | |
ab7a664f NK |
1631 | */ |
1632 | ||
ba1b0f6c NK |
1633 | /** |
1634 | * drm_connector_attach_vrr_capable_property - creates the | |
1635 | * vrr_capable property | |
1636 | * @connector: connector to create the vrr_capable property on. | |
1637 | * | |
1638 | * This is used by atomic drivers to add support for querying | |
1639 | * variable refresh rate capability for a connector. | |
1640 | * | |
1641 | * Returns: | |
84e543bc | 1642 | * Zero on success, negative errno on failure. |
ba1b0f6c NK |
1643 | */ |
1644 | int drm_connector_attach_vrr_capable_property( | |
1645 | struct drm_connector *connector) | |
1646 | { | |
1647 | struct drm_device *dev = connector->dev; | |
1648 | struct drm_property *prop; | |
1649 | ||
1650 | if (!connector->vrr_capable_property) { | |
1651 | prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, | |
1652 | "vrr_capable"); | |
1653 | if (!prop) | |
1654 | return -ENOMEM; | |
1655 | ||
1656 | connector->vrr_capable_property = prop; | |
1657 | drm_object_attach_property(&connector->base, prop, 0); | |
1658 | } | |
1659 | ||
1660 | return 0; | |
1661 | } | |
1662 | EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property); | |
1663 | ||
8f6e1e22 ML |
1664 | /** |
1665 | * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property | |
1666 | * @connector: connector to attach scaling mode property on. | |
1667 | * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*). | |
1668 | * | |
1669 | * This is used to add support for scaling mode to atomic drivers. | |
1670 | * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio | |
1671 | * and can be used from &drm_connector_helper_funcs->atomic_check for validation. | |
1672 | * | |
1673 | * This is the atomic version of drm_mode_create_scaling_mode_property(). | |
1674 | * | |
1675 | * Returns: | |
1676 | * Zero on success, negative errno on failure. | |
1677 | */ | |
1678 | int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, | |
1679 | u32 scaling_mode_mask) | |
1680 | { | |
1681 | struct drm_device *dev = connector->dev; | |
1682 | struct drm_property *scaling_mode_property; | |
30e9db6d | 1683 | int i; |
8f6e1e22 ML |
1684 | const unsigned valid_scaling_mode_mask = |
1685 | (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1; | |
1686 | ||
1687 | if (WARN_ON(hweight32(scaling_mode_mask) < 2 || | |
1688 | scaling_mode_mask & ~valid_scaling_mode_mask)) | |
1689 | return -EINVAL; | |
1690 | ||
1691 | scaling_mode_property = | |
1692 | drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode", | |
1693 | hweight32(scaling_mode_mask)); | |
1694 | ||
1695 | if (!scaling_mode_property) | |
1696 | return -ENOMEM; | |
1697 | ||
1698 | for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) { | |
1699 | int ret; | |
1700 | ||
1701 | if (!(BIT(i) & scaling_mode_mask)) | |
1702 | continue; | |
1703 | ||
30e9db6d | 1704 | ret = drm_property_add_enum(scaling_mode_property, |
8f6e1e22 ML |
1705 | drm_scaling_mode_enum_list[i].type, |
1706 | drm_scaling_mode_enum_list[i].name); | |
1707 | ||
1708 | if (ret) { | |
1709 | drm_property_destroy(dev, scaling_mode_property); | |
1710 | ||
1711 | return ret; | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | drm_object_attach_property(&connector->base, | |
1716 | scaling_mode_property, 0); | |
1717 | ||
1718 | connector->scaling_mode_property = scaling_mode_property; | |
1719 | ||
1720 | return 0; | |
1721 | } | |
1722 | EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property); | |
1723 | ||
52217195 DV |
1724 | /** |
1725 | * drm_mode_create_aspect_ratio_property - create aspect ratio property | |
1726 | * @dev: DRM device | |
1727 | * | |
1728 | * Called by a driver the first time it's needed, must be attached to desired | |
1729 | * connectors. | |
1730 | * | |
1731 | * Returns: | |
1732 | * Zero on success, negative errno on failure. | |
1733 | */ | |
1734 | int drm_mode_create_aspect_ratio_property(struct drm_device *dev) | |
1735 | { | |
1736 | if (dev->mode_config.aspect_ratio_property) | |
1737 | return 0; | |
1738 | ||
1739 | dev->mode_config.aspect_ratio_property = | |
1740 | drm_property_create_enum(dev, 0, "aspect ratio", | |
1741 | drm_aspect_ratio_enum_list, | |
1742 | ARRAY_SIZE(drm_aspect_ratio_enum_list)); | |
1743 | ||
1744 | if (dev->mode_config.aspect_ratio_property == NULL) | |
1745 | return -ENOMEM; | |
1746 | ||
1747 | return 0; | |
1748 | } | |
1749 | EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); | |
1750 | ||
d2c6a405 US |
1751 | /** |
1752 | * DOC: standard connector properties | |
1753 | * | |
1754 | * Colorspace: | |
d2c6a405 US |
1755 | * This property helps select a suitable colorspace based on the sink |
1756 | * capability. Modern sink devices support wider gamut like BT2020. | |
1757 | * This helps switch to BT2020 mode if the BT2020 encoded video stream | |
1758 | * is being played by the user, same for any other colorspace. Thereby | |
1759 | * giving a good visual experience to users. | |
1760 | * | |
1761 | * The expectation from userspace is that it should parse the EDID | |
1762 | * and get supported colorspaces. Use this property and switch to the | |
1763 | * one supported. Sink supported colorspaces should be retrieved by | |
1764 | * userspace from EDID and driver will not explicitly expose them. | |
1765 | * | |
1766 | * Basically the expectation from userspace is: | |
1767 | * - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink | |
1768 | * colorspace | |
1769 | * - Set this new property to let the sink know what it | |
1770 | * converted the CRTC output to. | |
1771 | * - This property is just to inform sink what colorspace | |
1772 | * source is trying to drive. | |
1773 | * | |
8806cd3a | 1774 | * Because between HDMI and DP have different colorspaces, |
45cf0e91 GM |
1775 | * drm_mode_create_hdmi_colorspace_property() is used for HDMI connector and |
1776 | * drm_mode_create_dp_colorspace_property() is used for DP connector. | |
8806cd3a GM |
1777 | */ |
1778 | ||
1779 | /** | |
1780 | * drm_mode_create_hdmi_colorspace_property - create hdmi colorspace property | |
1781 | * @connector: connector to create the Colorspace property on. | |
1782 | * | |
d2c6a405 | 1783 | * Called by a driver the first time it's needed, must be attached to desired |
8806cd3a GM |
1784 | * HDMI connectors. |
1785 | * | |
1786 | * Returns: | |
84e543bc | 1787 | * Zero on success, negative errno on failure. |
d2c6a405 | 1788 | */ |
8806cd3a | 1789 | int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector) |
d2c6a405 US |
1790 | { |
1791 | struct drm_device *dev = connector->dev; | |
d2c6a405 | 1792 | |
8806cd3a | 1793 | if (connector->colorspace_property) |
d2c6a405 | 1794 | return 0; |
d2c6a405 | 1795 | |
8806cd3a GM |
1796 | connector->colorspace_property = |
1797 | drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace", | |
1798 | hdmi_colorspaces, | |
1799 | ARRAY_SIZE(hdmi_colorspaces)); | |
1800 | ||
1801 | if (!connector->colorspace_property) | |
1802 | return -ENOMEM; | |
d2c6a405 US |
1803 | |
1804 | return 0; | |
1805 | } | |
8806cd3a | 1806 | EXPORT_SYMBOL(drm_mode_create_hdmi_colorspace_property); |
d2c6a405 | 1807 | |
45cf0e91 GM |
1808 | /** |
1809 | * drm_mode_create_dp_colorspace_property - create dp colorspace property | |
1810 | * @connector: connector to create the Colorspace property on. | |
1811 | * | |
1812 | * Called by a driver the first time it's needed, must be attached to desired | |
1813 | * DP connectors. | |
1814 | * | |
1815 | * Returns: | |
84e543bc | 1816 | * Zero on success, negative errno on failure. |
45cf0e91 GM |
1817 | */ |
1818 | int drm_mode_create_dp_colorspace_property(struct drm_connector *connector) | |
1819 | { | |
1820 | struct drm_device *dev = connector->dev; | |
1821 | ||
1822 | if (connector->colorspace_property) | |
1823 | return 0; | |
1824 | ||
1825 | connector->colorspace_property = | |
1826 | drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace", | |
1827 | dp_colorspaces, | |
1828 | ARRAY_SIZE(dp_colorspaces)); | |
1829 | ||
1830 | if (!connector->colorspace_property) | |
1831 | return -ENOMEM; | |
d2c6a405 US |
1832 | |
1833 | return 0; | |
1834 | } | |
45cf0e91 | 1835 | EXPORT_SYMBOL(drm_mode_create_dp_colorspace_property); |
d2c6a405 | 1836 | |
50525c33 SL |
1837 | /** |
1838 | * drm_mode_create_content_type_property - create content type property | |
1839 | * @dev: DRM device | |
1840 | * | |
1841 | * Called by a driver the first time it's needed, must be attached to desired | |
1842 | * connectors. | |
1843 | * | |
1844 | * Returns: | |
1845 | * Zero on success, negative errno on failure. | |
1846 | */ | |
1847 | int drm_mode_create_content_type_property(struct drm_device *dev) | |
1848 | { | |
1849 | if (dev->mode_config.content_type_property) | |
1850 | return 0; | |
1851 | ||
1852 | dev->mode_config.content_type_property = | |
1853 | drm_property_create_enum(dev, 0, "content type", | |
1854 | drm_content_type_enum_list, | |
1855 | ARRAY_SIZE(drm_content_type_enum_list)); | |
1856 | ||
1857 | if (dev->mode_config.content_type_property == NULL) | |
1858 | return -ENOMEM; | |
1859 | ||
1860 | return 0; | |
1861 | } | |
1862 | EXPORT_SYMBOL(drm_mode_create_content_type_property); | |
1863 | ||
52217195 DV |
1864 | /** |
1865 | * drm_mode_create_suggested_offset_properties - create suggests offset properties | |
1866 | * @dev: DRM device | |
1867 | * | |
84e543bc | 1868 | * Create the suggested x/y offset property for connectors. |
52217195 DV |
1869 | */ |
1870 | int drm_mode_create_suggested_offset_properties(struct drm_device *dev) | |
1871 | { | |
1872 | if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) | |
1873 | return 0; | |
1874 | ||
1875 | dev->mode_config.suggested_x_property = | |
1876 | drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); | |
1877 | ||
1878 | dev->mode_config.suggested_y_property = | |
1879 | drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); | |
1880 | ||
1881 | if (dev->mode_config.suggested_x_property == NULL || | |
1882 | dev->mode_config.suggested_y_property == NULL) | |
1883 | return -ENOMEM; | |
1884 | return 0; | |
1885 | } | |
1886 | EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); | |
1887 | ||
1888 | /** | |
97e14fbe | 1889 | * drm_connector_set_path_property - set tile property on connector |
52217195 DV |
1890 | * @connector: connector to set property on. |
1891 | * @path: path to use for property; must not be NULL. | |
1892 | * | |
1893 | * This creates a property to expose to userspace to specify a | |
1894 | * connector path. This is mainly used for DisplayPort MST where | |
1895 | * connectors have a topology and we want to allow userspace to give | |
1896 | * them more meaningful names. | |
1897 | * | |
1898 | * Returns: | |
1899 | * Zero on success, negative errno on failure. | |
1900 | */ | |
97e14fbe DV |
1901 | int drm_connector_set_path_property(struct drm_connector *connector, |
1902 | const char *path) | |
52217195 DV |
1903 | { |
1904 | struct drm_device *dev = connector->dev; | |
1905 | int ret; | |
1906 | ||
1907 | ret = drm_property_replace_global_blob(dev, | |
1908 | &connector->path_blob_ptr, | |
1909 | strlen(path) + 1, | |
1910 | path, | |
1911 | &connector->base, | |
1912 | dev->mode_config.path_property); | |
1913 | return ret; | |
1914 | } | |
97e14fbe | 1915 | EXPORT_SYMBOL(drm_connector_set_path_property); |
52217195 DV |
1916 | |
1917 | /** | |
97e14fbe | 1918 | * drm_connector_set_tile_property - set tile property on connector |
52217195 DV |
1919 | * @connector: connector to set property on. |
1920 | * | |
1921 | * This looks up the tile information for a connector, and creates a | |
1922 | * property for userspace to parse if it exists. The property is of | |
1923 | * the form of 8 integers using ':' as a separator. | |
2de3a078 MN |
1924 | * This is used for dual port tiled displays with DisplayPort SST |
1925 | * or DisplayPort MST connectors. | |
52217195 DV |
1926 | * |
1927 | * Returns: | |
1928 | * Zero on success, errno on failure. | |
1929 | */ | |
97e14fbe | 1930 | int drm_connector_set_tile_property(struct drm_connector *connector) |
52217195 DV |
1931 | { |
1932 | struct drm_device *dev = connector->dev; | |
1933 | char tile[256]; | |
1934 | int ret; | |
1935 | ||
1936 | if (!connector->has_tile) { | |
1937 | ret = drm_property_replace_global_blob(dev, | |
1938 | &connector->tile_blob_ptr, | |
1939 | 0, | |
1940 | NULL, | |
1941 | &connector->base, | |
1942 | dev->mode_config.tile_property); | |
1943 | return ret; | |
1944 | } | |
1945 | ||
1946 | snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", | |
1947 | connector->tile_group->id, connector->tile_is_single_monitor, | |
1948 | connector->num_h_tile, connector->num_v_tile, | |
1949 | connector->tile_h_loc, connector->tile_v_loc, | |
1950 | connector->tile_h_size, connector->tile_v_size); | |
1951 | ||
1952 | ret = drm_property_replace_global_blob(dev, | |
1953 | &connector->tile_blob_ptr, | |
1954 | strlen(tile) + 1, | |
1955 | tile, | |
1956 | &connector->base, | |
1957 | dev->mode_config.tile_property); | |
1958 | return ret; | |
1959 | } | |
97e14fbe | 1960 | EXPORT_SYMBOL(drm_connector_set_tile_property); |
52217195 DV |
1961 | |
1962 | /** | |
c555f023 | 1963 | * drm_connector_update_edid_property - update the edid property of a connector |
52217195 DV |
1964 | * @connector: drm connector |
1965 | * @edid: new value of the edid property | |
1966 | * | |
1967 | * This function creates a new blob modeset object and assigns its id to the | |
1968 | * connector's edid property. | |
2de3a078 MN |
1969 | * Since we also parse tile information from EDID's displayID block, we also |
1970 | * set the connector's tile property here. See drm_connector_set_tile_property() | |
1971 | * for more details. | |
52217195 DV |
1972 | * |
1973 | * Returns: | |
1974 | * Zero on success, negative errno on failure. | |
1975 | */ | |
c555f023 | 1976 | int drm_connector_update_edid_property(struct drm_connector *connector, |
97e14fbe | 1977 | const struct edid *edid) |
52217195 DV |
1978 | { |
1979 | struct drm_device *dev = connector->dev; | |
1980 | size_t size = 0; | |
1981 | int ret; | |
1982 | ||
1983 | /* ignore requests to set edid when overridden */ | |
1984 | if (connector->override_edid) | |
1985 | return 0; | |
1986 | ||
1987 | if (edid) | |
1988 | size = EDID_LENGTH * (1 + edid->extensions); | |
1989 | ||
170178fe | 1990 | /* Set the display info, using edid if available, otherwise |
84e543bc | 1991 | * resetting the values to defaults. This duplicates the work |
170178fe KP |
1992 | * done in drm_add_edid_modes, but that function is not |
1993 | * consistently called before this one in all drivers and the | |
1994 | * computation is cheap enough that it seems better to | |
1995 | * duplicate it rather than attempt to ensure some arbitrary | |
1996 | * ordering of calls. | |
1997 | */ | |
1998 | if (edid) | |
1999 | drm_add_display_info(connector, edid); | |
2000 | else | |
2001 | drm_reset_display_info(connector); | |
2002 | ||
092c367a VS |
2003 | drm_update_tile_info(connector, edid); |
2004 | ||
66660d4c DA |
2005 | drm_object_property_set_value(&connector->base, |
2006 | dev->mode_config.non_desktop_property, | |
2007 | connector->display_info.non_desktop); | |
2008 | ||
52217195 DV |
2009 | ret = drm_property_replace_global_blob(dev, |
2010 | &connector->edid_blob_ptr, | |
2011 | size, | |
2012 | edid, | |
2013 | &connector->base, | |
2014 | dev->mode_config.edid_property); | |
2de3a078 MN |
2015 | if (ret) |
2016 | return ret; | |
2017 | return drm_connector_set_tile_property(connector); | |
52217195 | 2018 | } |
c555f023 | 2019 | EXPORT_SYMBOL(drm_connector_update_edid_property); |
52217195 | 2020 | |
40ee6fbe | 2021 | /** |
97e14fbe | 2022 | * drm_connector_set_link_status_property - Set link status property of a connector |
40ee6fbe MN |
2023 | * @connector: drm connector |
2024 | * @link_status: new value of link status property (0: Good, 1: Bad) | |
2025 | * | |
2026 | * In usual working scenario, this link status property will always be set to | |
2027 | * "GOOD". If something fails during or after a mode set, the kernel driver | |
2028 | * may set this link status property to "BAD". The caller then needs to send a | |
2029 | * hotplug uevent for userspace to re-check the valid modes through | |
2030 | * GET_CONNECTOR_IOCTL and retry modeset. | |
2031 | * | |
2032 | * Note: Drivers cannot rely on userspace to support this property and | |
2033 | * issue a modeset. As such, they may choose to handle issues (like | |
2034 | * re-training a link) without userspace's intervention. | |
2035 | * | |
2036 | * The reason for adding this property is to handle link training failures, but | |
2037 | * it is not limited to DP or link training. For example, if we implement | |
2038 | * asynchronous setcrtc, this property can be used to report any failures in that. | |
2039 | */ | |
97e14fbe DV |
2040 | void drm_connector_set_link_status_property(struct drm_connector *connector, |
2041 | uint64_t link_status) | |
40ee6fbe MN |
2042 | { |
2043 | struct drm_device *dev = connector->dev; | |
2044 | ||
2045 | drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); | |
2046 | connector->state->link_status = link_status; | |
2047 | drm_modeset_unlock(&dev->mode_config.connection_mutex); | |
2048 | } | |
97e14fbe | 2049 | EXPORT_SYMBOL(drm_connector_set_link_status_property); |
40ee6fbe | 2050 | |
47e22ff1 RS |
2051 | /** |
2052 | * drm_connector_attach_max_bpc_property - attach "max bpc" property | |
2053 | * @connector: connector to attach max bpc property on. | |
2054 | * @min: The minimum bit depth supported by the connector. | |
2055 | * @max: The maximum bit depth supported by the connector. | |
2056 | * | |
2057 | * This is used to add support for limiting the bit depth on a connector. | |
2058 | * | |
2059 | * Returns: | |
2060 | * Zero on success, negative errno on failure. | |
2061 | */ | |
2062 | int drm_connector_attach_max_bpc_property(struct drm_connector *connector, | |
2063 | int min, int max) | |
2064 | { | |
2065 | struct drm_device *dev = connector->dev; | |
2066 | struct drm_property *prop; | |
2067 | ||
2068 | prop = connector->max_bpc_property; | |
2069 | if (!prop) { | |
2070 | prop = drm_property_create_range(dev, 0, "max bpc", min, max); | |
2071 | if (!prop) | |
2072 | return -ENOMEM; | |
2073 | ||
2074 | connector->max_bpc_property = prop; | |
2075 | } | |
2076 | ||
2077 | drm_object_attach_property(&connector->base, prop, max); | |
2078 | connector->state->max_requested_bpc = max; | |
2079 | connector->state->max_bpc = max; | |
2080 | ||
2081 | return 0; | |
2082 | } | |
2083 | EXPORT_SYMBOL(drm_connector_attach_max_bpc_property); | |
2084 | ||
ba1b0f6c NK |
2085 | /** |
2086 | * drm_connector_set_vrr_capable_property - sets the variable refresh rate | |
2087 | * capable property for a connector | |
2088 | * @connector: drm connector | |
2089 | * @capable: True if the connector is variable refresh rate capable | |
2090 | * | |
2091 | * Should be used by atomic drivers to update the indicated support for | |
2092 | * variable refresh rate over a connector. | |
2093 | */ | |
2094 | void drm_connector_set_vrr_capable_property( | |
2095 | struct drm_connector *connector, bool capable) | |
2096 | { | |
2097 | drm_object_property_set_value(&connector->base, | |
2098 | connector->vrr_capable_property, | |
2099 | capable); | |
2100 | } | |
2101 | EXPORT_SYMBOL(drm_connector_set_vrr_capable_property); | |
2102 | ||
8d70f395 | 2103 | /** |
84e543bc | 2104 | * drm_connector_set_panel_orientation - sets the connector's panel_orientation |
69654c63 DB |
2105 | * @connector: connector for which to set the panel-orientation property. |
2106 | * @panel_orientation: drm_panel_orientation value to set | |
2107 | * | |
2108 | * This function sets the connector's panel_orientation and attaches | |
2109 | * a "panel orientation" property to the connector. | |
8d70f395 | 2110 | * |
69654c63 DB |
2111 | * Calling this function on a connector where the panel_orientation has |
2112 | * already been set is a no-op (e.g. the orientation has been overridden with | |
2113 | * a kernel commandline option). | |
8d70f395 | 2114 | * |
69654c63 DB |
2115 | * It is allowed to call this function with a panel_orientation of |
2116 | * DRM_MODE_PANEL_ORIENTATION_UNKNOWN, in which case it is a no-op. | |
8d70f395 HG |
2117 | * |
2118 | * Returns: | |
2119 | * Zero on success, negative errno on failure. | |
2120 | */ | |
69654c63 DB |
2121 | int drm_connector_set_panel_orientation( |
2122 | struct drm_connector *connector, | |
2123 | enum drm_panel_orientation panel_orientation) | |
8d70f395 HG |
2124 | { |
2125 | struct drm_device *dev = connector->dev; | |
2126 | struct drm_display_info *info = &connector->display_info; | |
2127 | struct drm_property *prop; | |
8d70f395 | 2128 | |
69654c63 DB |
2129 | /* Already set? */ |
2130 | if (info->panel_orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) | |
2131 | return 0; | |
8d70f395 | 2132 | |
69654c63 DB |
2133 | /* Don't attach the property if the orientation is unknown */ |
2134 | if (panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN) | |
8d70f395 HG |
2135 | return 0; |
2136 | ||
69654c63 DB |
2137 | info->panel_orientation = panel_orientation; |
2138 | ||
8d70f395 HG |
2139 | prop = dev->mode_config.panel_orientation_property; |
2140 | if (!prop) { | |
2141 | prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | |
2142 | "panel orientation", | |
2143 | drm_panel_orientation_enum_list, | |
2144 | ARRAY_SIZE(drm_panel_orientation_enum_list)); | |
2145 | if (!prop) | |
2146 | return -ENOMEM; | |
2147 | ||
2148 | dev->mode_config.panel_orientation_property = prop; | |
2149 | } | |
2150 | ||
2151 | drm_object_attach_property(&connector->base, prop, | |
2152 | info->panel_orientation); | |
2153 | return 0; | |
2154 | } | |
69654c63 DB |
2155 | EXPORT_SYMBOL(drm_connector_set_panel_orientation); |
2156 | ||
2157 | /** | |
2158 | * drm_connector_set_panel_orientation_with_quirk - | |
84e543bc | 2159 | * set the connector's panel_orientation after checking for quirks |
69654c63 DB |
2160 | * @connector: connector for which to init the panel-orientation property. |
2161 | * @panel_orientation: drm_panel_orientation value to set | |
2162 | * @width: width in pixels of the panel, used for panel quirk detection | |
2163 | * @height: height in pixels of the panel, used for panel quirk detection | |
2164 | * | |
2165 | * Like drm_connector_set_panel_orientation(), but with a check for platform | |
2166 | * specific (e.g. DMI based) quirks overriding the passed in panel_orientation. | |
2167 | * | |
2168 | * Returns: | |
2169 | * Zero on success, negative errno on failure. | |
2170 | */ | |
2171 | int drm_connector_set_panel_orientation_with_quirk( | |
2172 | struct drm_connector *connector, | |
2173 | enum drm_panel_orientation panel_orientation, | |
2174 | int width, int height) | |
2175 | { | |
2176 | int orientation_quirk; | |
2177 | ||
2178 | orientation_quirk = drm_get_panel_orientation_quirk(width, height); | |
2179 | if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) | |
2180 | panel_orientation = orientation_quirk; | |
2181 | ||
2182 | return drm_connector_set_panel_orientation(connector, | |
2183 | panel_orientation); | |
2184 | } | |
2185 | EXPORT_SYMBOL(drm_connector_set_panel_orientation_with_quirk); | |
8d70f395 | 2186 | |
97e14fbe | 2187 | int drm_connector_set_obj_prop(struct drm_mode_object *obj, |
52217195 DV |
2188 | struct drm_property *property, |
2189 | uint64_t value) | |
2190 | { | |
2191 | int ret = -EINVAL; | |
2192 | struct drm_connector *connector = obj_to_connector(obj); | |
2193 | ||
2194 | /* Do DPMS ourselves */ | |
2195 | if (property == connector->dev->mode_config.dpms_property) { | |
2196 | ret = (*connector->funcs->dpms)(connector, (int)value); | |
2197 | } else if (connector->funcs->set_property) | |
2198 | ret = connector->funcs->set_property(connector, property, value); | |
2199 | ||
144a7999 | 2200 | if (!ret) |
52217195 DV |
2201 | drm_object_property_set_value(&connector->base, property, value); |
2202 | return ret; | |
2203 | } | |
2204 | ||
97e14fbe DV |
2205 | int drm_connector_property_set_ioctl(struct drm_device *dev, |
2206 | void *data, struct drm_file *file_priv) | |
52217195 DV |
2207 | { |
2208 | struct drm_mode_connector_set_property *conn_set_prop = data; | |
2209 | struct drm_mode_obj_set_property obj_set_prop = { | |
2210 | .value = conn_set_prop->value, | |
2211 | .prop_id = conn_set_prop->prop_id, | |
2212 | .obj_id = conn_set_prop->connector_id, | |
2213 | .obj_type = DRM_MODE_OBJECT_CONNECTOR | |
2214 | }; | |
2215 | ||
2216 | /* It does all the locking and checking we need */ | |
2217 | return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); | |
2218 | } | |
2219 | ||
2220 | static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) | |
2221 | { | |
2222 | /* For atomic drivers only state objects are synchronously updated and | |
2223 | * protected by modeset locks, so check those first. */ | |
2224 | if (connector->state) | |
2225 | return connector->state->best_encoder; | |
2226 | return connector->encoder; | |
2227 | } | |
2228 | ||
c3ff0cdb AN |
2229 | static bool |
2230 | drm_mode_expose_to_userspace(const struct drm_display_mode *mode, | |
2231 | const struct list_head *export_list, | |
2232 | const struct drm_file *file_priv) | |
52217195 DV |
2233 | { |
2234 | /* | |
2235 | * If user-space hasn't configured the driver to expose the stereo 3D | |
2236 | * modes, don't expose them. | |
2237 | */ | |
2238 | if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) | |
2239 | return false; | |
c3ff0cdb AN |
2240 | /* |
2241 | * If user-space hasn't configured the driver to expose the modes | |
2242 | * with aspect-ratio, don't expose them. However if such a mode | |
2243 | * is unique, let it be exposed, but reset the aspect-ratio flags | |
2244 | * while preparing the list of user-modes. | |
2245 | */ | |
2246 | if (!file_priv->aspect_ratio_allowed) { | |
2247 | struct drm_display_mode *mode_itr; | |
2248 | ||
2249 | list_for_each_entry(mode_itr, export_list, export_head) | |
2250 | if (drm_mode_match(mode_itr, mode, | |
2251 | DRM_MODE_MATCH_TIMINGS | | |
2252 | DRM_MODE_MATCH_CLOCK | | |
2253 | DRM_MODE_MATCH_FLAGS | | |
2254 | DRM_MODE_MATCH_3D_FLAGS)) | |
2255 | return false; | |
2256 | } | |
52217195 DV |
2257 | |
2258 | return true; | |
2259 | } | |
2260 | ||
2261 | int drm_mode_getconnector(struct drm_device *dev, void *data, | |
2262 | struct drm_file *file_priv) | |
2263 | { | |
2264 | struct drm_mode_get_connector *out_resp = data; | |
2265 | struct drm_connector *connector; | |
2266 | struct drm_encoder *encoder; | |
2267 | struct drm_display_mode *mode; | |
2268 | int mode_count = 0; | |
2269 | int encoders_count = 0; | |
2270 | int ret = 0; | |
2271 | int copied = 0; | |
52217195 DV |
2272 | struct drm_mode_modeinfo u_mode; |
2273 | struct drm_mode_modeinfo __user *mode_ptr; | |
2274 | uint32_t __user *encoder_ptr; | |
c3ff0cdb | 2275 | LIST_HEAD(export_list); |
52217195 DV |
2276 | |
2277 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |
69fdf420 | 2278 | return -EOPNOTSUPP; |
52217195 DV |
2279 | |
2280 | memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); | |
2281 | ||
418da172 | 2282 | connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id); |
91eefc05 DV |
2283 | if (!connector) |
2284 | return -ENOENT; | |
2285 | ||
62afb4ad | 2286 | encoders_count = hweight32(connector->possible_encoders); |
52217195 | 2287 | |
91eefc05 DV |
2288 | if ((out_resp->count_encoders >= encoders_count) && encoders_count) { |
2289 | copied = 0; | |
2290 | encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); | |
83aefbb8 | 2291 | |
62afb4ad | 2292 | drm_connector_for_each_possible_encoder(connector, encoder) { |
83aefbb8 VS |
2293 | if (put_user(encoder->base.id, encoder_ptr + copied)) { |
2294 | ret = -EFAULT; | |
2295 | goto out; | |
91eefc05 | 2296 | } |
83aefbb8 | 2297 | copied++; |
91eefc05 DV |
2298 | } |
2299 | } | |
2300 | out_resp->count_encoders = encoders_count; | |
2301 | ||
2302 | out_resp->connector_id = connector->base.id; | |
2303 | out_resp->connector_type = connector->connector_type; | |
2304 | out_resp->connector_type_id = connector->connector_type_id; | |
2305 | ||
2306 | mutex_lock(&dev->mode_config.mutex); | |
52217195 DV |
2307 | if (out_resp->count_modes == 0) { |
2308 | connector->funcs->fill_modes(connector, | |
2309 | dev->mode_config.max_width, | |
2310 | dev->mode_config.max_height); | |
2311 | } | |
2312 | ||
52217195 DV |
2313 | out_resp->mm_width = connector->display_info.width_mm; |
2314 | out_resp->mm_height = connector->display_info.height_mm; | |
2315 | out_resp->subpixel = connector->display_info.subpixel_order; | |
2316 | out_resp->connection = connector->status; | |
2317 | ||
91eefc05 DV |
2318 | /* delayed so we get modes regardless of pre-fill_modes state */ |
2319 | list_for_each_entry(mode, &connector->modes, head) | |
c3ff0cdb AN |
2320 | if (drm_mode_expose_to_userspace(mode, &export_list, |
2321 | file_priv)) { | |
2322 | list_add_tail(&mode->export_head, &export_list); | |
91eefc05 | 2323 | mode_count++; |
c3ff0cdb | 2324 | } |
52217195 DV |
2325 | |
2326 | /* | |
2327 | * This ioctl is called twice, once to determine how much space is | |
2328 | * needed, and the 2nd time to fill it. | |
c3ff0cdb AN |
2329 | * The modes that need to be exposed to the user are maintained in the |
2330 | * 'export_list'. When the ioctl is called first time to determine the, | |
2331 | * space, the export_list gets filled, to find the no.of modes. In the | |
2332 | * 2nd time, the user modes are filled, one by one from the export_list. | |
52217195 DV |
2333 | */ |
2334 | if ((out_resp->count_modes >= mode_count) && mode_count) { | |
2335 | copied = 0; | |
2336 | mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; | |
c3ff0cdb | 2337 | list_for_each_entry(mode, &export_list, export_head) { |
52217195 | 2338 | drm_mode_convert_to_umode(&u_mode, mode); |
c3ff0cdb AN |
2339 | /* |
2340 | * Reset aspect ratio flags of user-mode, if modes with | |
2341 | * aspect-ratio are not supported. | |
2342 | */ | |
2343 | if (!file_priv->aspect_ratio_allowed) | |
2344 | u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; | |
52217195 DV |
2345 | if (copy_to_user(mode_ptr + copied, |
2346 | &u_mode, sizeof(u_mode))) { | |
2347 | ret = -EFAULT; | |
e94ac351 DV |
2348 | mutex_unlock(&dev->mode_config.mutex); |
2349 | ||
52217195 DV |
2350 | goto out; |
2351 | } | |
2352 | copied++; | |
2353 | } | |
2354 | } | |
2355 | out_resp->count_modes = mode_count; | |
52217195 | 2356 | mutex_unlock(&dev->mode_config.mutex); |
e94ac351 DV |
2357 | |
2358 | drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); | |
2359 | encoder = drm_connector_get_encoder(connector); | |
2360 | if (encoder) | |
2361 | out_resp->encoder_id = encoder->base.id; | |
2362 | else | |
2363 | out_resp->encoder_id = 0; | |
2364 | ||
2365 | /* Only grab properties after probing, to make sure EDID and other | |
2366 | * properties reflect the latest status. */ | |
2367 | ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic, | |
2368 | (uint32_t __user *)(unsigned long)(out_resp->props_ptr), | |
2369 | (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), | |
2370 | &out_resp->count_props); | |
2371 | drm_modeset_unlock(&dev->mode_config.connection_mutex); | |
2372 | ||
2373 | out: | |
ad093607 | 2374 | drm_connector_put(connector); |
52217195 DV |
2375 | |
2376 | return ret; | |
2377 | } | |
2378 | ||
9498c19b DV |
2379 | |
2380 | /** | |
2381 | * DOC: Tile group | |
2382 | * | |
2383 | * Tile groups are used to represent tiled monitors with a unique integer | |
2384 | * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle, | |
2385 | * we store this in a tile group, so we have a common identifier for all tiles | |
2386 | * in a monitor group. The property is called "TILE". Drivers can manage tile | |
2387 | * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and | |
2388 | * drm_mode_get_tile_group(). But this is only needed for internal panels where | |
2389 | * the tile group information is exposed through a non-standard way. | |
2390 | */ | |
2391 | ||
2392 | static void drm_tile_group_free(struct kref *kref) | |
2393 | { | |
2394 | struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); | |
2395 | struct drm_device *dev = tg->dev; | |
2396 | mutex_lock(&dev->mode_config.idr_mutex); | |
2397 | idr_remove(&dev->mode_config.tile_idr, tg->id); | |
2398 | mutex_unlock(&dev->mode_config.idr_mutex); | |
2399 | kfree(tg); | |
2400 | } | |
2401 | ||
2402 | /** | |
2403 | * drm_mode_put_tile_group - drop a reference to a tile group. | |
2404 | * @dev: DRM device | |
2405 | * @tg: tile group to drop reference to. | |
2406 | * | |
2407 | * drop reference to tile group and free if 0. | |
2408 | */ | |
2409 | void drm_mode_put_tile_group(struct drm_device *dev, | |
2410 | struct drm_tile_group *tg) | |
2411 | { | |
2412 | kref_put(&tg->refcount, drm_tile_group_free); | |
2413 | } | |
2414 | EXPORT_SYMBOL(drm_mode_put_tile_group); | |
2415 | ||
2416 | /** | |
2417 | * drm_mode_get_tile_group - get a reference to an existing tile group | |
2418 | * @dev: DRM device | |
2419 | * @topology: 8-bytes unique per monitor. | |
2420 | * | |
2421 | * Use the unique bytes to get a reference to an existing tile group. | |
2422 | * | |
2423 | * RETURNS: | |
2424 | * tile group or NULL if not found. | |
2425 | */ | |
2426 | struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, | |
267ea759 | 2427 | const char topology[8]) |
9498c19b DV |
2428 | { |
2429 | struct drm_tile_group *tg; | |
2430 | int id; | |
2431 | mutex_lock(&dev->mode_config.idr_mutex); | |
2432 | idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { | |
2433 | if (!memcmp(tg->group_data, topology, 8)) { | |
2434 | if (!kref_get_unless_zero(&tg->refcount)) | |
2435 | tg = NULL; | |
2436 | mutex_unlock(&dev->mode_config.idr_mutex); | |
2437 | return tg; | |
2438 | } | |
2439 | } | |
2440 | mutex_unlock(&dev->mode_config.idr_mutex); | |
2441 | return NULL; | |
2442 | } | |
2443 | EXPORT_SYMBOL(drm_mode_get_tile_group); | |
2444 | ||
2445 | /** | |
2446 | * drm_mode_create_tile_group - create a tile group from a displayid description | |
2447 | * @dev: DRM device | |
2448 | * @topology: 8-bytes unique per monitor. | |
2449 | * | |
2450 | * Create a tile group for the unique monitor, and get a unique | |
2451 | * identifier for the tile group. | |
2452 | * | |
2453 | * RETURNS: | |
705c8160 | 2454 | * new tile group or NULL. |
9498c19b DV |
2455 | */ |
2456 | struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, | |
267ea759 | 2457 | const char topology[8]) |
9498c19b DV |
2458 | { |
2459 | struct drm_tile_group *tg; | |
2460 | int ret; | |
2461 | ||
2462 | tg = kzalloc(sizeof(*tg), GFP_KERNEL); | |
2463 | if (!tg) | |
705c8160 | 2464 | return NULL; |
9498c19b DV |
2465 | |
2466 | kref_init(&tg->refcount); | |
2467 | memcpy(tg->group_data, topology, 8); | |
2468 | tg->dev = dev; | |
2469 | ||
2470 | mutex_lock(&dev->mode_config.idr_mutex); | |
2471 | ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); | |
2472 | if (ret >= 0) { | |
2473 | tg->id = ret; | |
2474 | } else { | |
2475 | kfree(tg); | |
705c8160 | 2476 | tg = NULL; |
9498c19b DV |
2477 | } |
2478 | ||
2479 | mutex_unlock(&dev->mode_config.idr_mutex); | |
2480 | return tg; | |
2481 | } | |
2482 | EXPORT_SYMBOL(drm_mode_create_tile_group); |