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1/*
2 * Copyright (c) 2016 Intel Corporation
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE.
21 */
22
23#include <drm/drmP.h>
24#include <drm/drm_connector.h>
25#include <drm/drm_edid.h>
26#include <drm/drm_encoder.h>
27#include <drm/drm_utils.h>
28
29#include "drm_crtc_internal.h"
30#include "drm_internal.h"
31
32/**
33 * DOC: overview
34 *
35 * In DRM connectors are the general abstraction for display sinks, and include
36 * als fixed panels or anything else that can display pixels in some form. As
37 * opposed to all other KMS objects representing hardware (like CRTC, encoder or
38 * plane abstractions) connectors can be hotplugged and unplugged at runtime.
39 * Hence they are reference-counted using drm_connector_get() and
40 * drm_connector_put().
41 *
42 * KMS driver must create, initialize, register and attach at a &struct
43 * drm_connector for each such sink. The instance is created as other KMS
44 * objects and initialized by setting the following fields. The connector is
45 * initialized with a call to drm_connector_init() with a pointer to the
46 * &struct drm_connector_funcs and a connector type, and then exposed to
47 * userspace with a call to drm_connector_register().
48 *
49 * Connectors must be attached to an encoder to be used. For devices that map
50 * connectors to encoders 1:1, the connector should be attached at
51 * initialization time with a call to drm_mode_connector_attach_encoder(). The
52 * driver must also set the &drm_connector.encoder field to point to the
53 * attached encoder.
54 *
55 * For connectors which are not fixed (like built-in panels) the driver needs to
56 * support hotplug notifications. The simplest way to do that is by using the
57 * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have
58 * hardware support for hotplug interrupts. Connectors with hardware hotplug
59 * support can instead use e.g. drm_helper_hpd_irq_event().
60 */
61
62struct drm_conn_prop_enum_list {
63 int type;
64 const char *name;
65 struct ida ida;
66};
67
68/*
69 * Connector and encoder types.
70 */
71static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
72 { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
73 { DRM_MODE_CONNECTOR_VGA, "VGA" },
74 { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
75 { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
76 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
77 { DRM_MODE_CONNECTOR_Composite, "Composite" },
78 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
79 { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
80 { DRM_MODE_CONNECTOR_Component, "Component" },
81 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
82 { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
83 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
84 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
85 { DRM_MODE_CONNECTOR_TV, "TV" },
86 { DRM_MODE_CONNECTOR_eDP, "eDP" },
87 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
88 { DRM_MODE_CONNECTOR_DSI, "DSI" },
89 { DRM_MODE_CONNECTOR_DPI, "DPI" },
90};
91
92void drm_connector_ida_init(void)
93{
94 int i;
95
96 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
97 ida_init(&drm_connector_enum_list[i].ida);
98}
99
100void drm_connector_ida_destroy(void)
101{
102 int i;
103
104 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
105 ida_destroy(&drm_connector_enum_list[i].ida);
106}
107
108/**
109 * drm_connector_get_cmdline_mode - reads the user's cmdline mode
110 * @connector: connector to quwery
111 *
112 * The kernel supports per-connector configuration of its consoles through
113 * use of the video= parameter. This function parses that option and
114 * extracts the user's specified mode (or enable/disable status) for a
115 * particular connector. This is typically only used during the early fbdev
116 * setup.
117 */
118static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
119{
120 struct drm_cmdline_mode *mode = &connector->cmdline_mode;
121 char *option = NULL;
122
123 if (fb_get_options(connector->name, &option))
124 return;
125
126 if (!drm_mode_parse_command_line_for_connector(option,
127 connector,
128 mode))
129 return;
130
131 if (mode->force) {
132 DRM_INFO("forcing %s connector %s\n", connector->name,
133 drm_get_connector_force_name(mode->force));
134 connector->force = mode->force;
135 }
136
137 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
138 connector->name,
139 mode->xres, mode->yres,
140 mode->refresh_specified ? mode->refresh : 60,
141 mode->rb ? " reduced blanking" : "",
142 mode->margins ? " with margins" : "",
143 mode->interlace ? " interlaced" : "");
144}
145
146static void drm_connector_free(struct kref *kref)
147{
148 struct drm_connector *connector =
149 container_of(kref, struct drm_connector, base.refcount);
150 struct drm_device *dev = connector->dev;
151
152 drm_mode_object_unregister(dev, &connector->base);
153 connector->funcs->destroy(connector);
154}
155
156void drm_connector_free_work_fn(struct work_struct *work)
157{
158 struct drm_connector *connector, *n;
159 struct drm_device *dev =
160 container_of(work, struct drm_device, mode_config.connector_free_work);
161 struct drm_mode_config *config = &dev->mode_config;
162 unsigned long flags;
163 struct llist_node *freed;
164
165 spin_lock_irqsave(&config->connector_list_lock, flags);
166 freed = llist_del_all(&config->connector_free_list);
167 spin_unlock_irqrestore(&config->connector_list_lock, flags);
168
169 llist_for_each_entry_safe(connector, n, freed, free_node) {
170 drm_mode_object_unregister(dev, &connector->base);
171 connector->funcs->destroy(connector);
172 }
173}
174
175/**
176 * drm_connector_init - Init a preallocated connector
177 * @dev: DRM device
178 * @connector: the connector to init
179 * @funcs: callbacks for this connector
180 * @connector_type: user visible type of the connector
181 *
182 * Initialises a preallocated connector. Connectors should be
183 * subclassed as part of driver connector objects.
184 *
185 * Returns:
186 * Zero on success, error code on failure.
187 */
188int drm_connector_init(struct drm_device *dev,
189 struct drm_connector *connector,
190 const struct drm_connector_funcs *funcs,
191 int connector_type)
192{
193 struct drm_mode_config *config = &dev->mode_config;
194 int ret;
195 struct ida *connector_ida =
196 &drm_connector_enum_list[connector_type].ida;
197
198 ret = __drm_mode_object_add(dev, &connector->base,
199 DRM_MODE_OBJECT_CONNECTOR,
200 false, drm_connector_free);
201 if (ret)
202 return ret;
203
204 connector->base.properties = &connector->properties;
205 connector->dev = dev;
206 connector->funcs = funcs;
207
208 /* connector index is used with 32bit bitmasks */
209 ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL);
210 if (ret < 0) {
211 DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n",
212 drm_connector_enum_list[connector_type].name,
213 ret);
214 goto out_put;
215 }
216 connector->index = ret;
217 ret = 0;
218
219 connector->connector_type = connector_type;
220 connector->connector_type_id =
221 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
222 if (connector->connector_type_id < 0) {
223 ret = connector->connector_type_id;
224 goto out_put_id;
225 }
226 connector->name =
227 kasprintf(GFP_KERNEL, "%s-%d",
228 drm_connector_enum_list[connector_type].name,
229 connector->connector_type_id);
230 if (!connector->name) {
231 ret = -ENOMEM;
232 goto out_put_type_id;
233 }
234
235 INIT_LIST_HEAD(&connector->probed_modes);
236 INIT_LIST_HEAD(&connector->modes);
237 mutex_init(&connector->mutex);
238 connector->edid_blob_ptr = NULL;
239 connector->status = connector_status_unknown;
240 connector->display_info.panel_orientation =
241 DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
242
243 drm_connector_get_cmdline_mode(connector);
244
245 /* We should add connectors at the end to avoid upsetting the connector
246 * index too much. */
247 spin_lock_irq(&config->connector_list_lock);
248 list_add_tail(&connector->head, &config->connector_list);
249 config->num_connector++;
250 spin_unlock_irq(&config->connector_list_lock);
251
252 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
253 drm_object_attach_property(&connector->base,
254 config->edid_property,
255 0);
256
257 drm_object_attach_property(&connector->base,
258 config->dpms_property, 0);
259
260 drm_object_attach_property(&connector->base,
261 config->link_status_property,
262 0);
263
264 drm_object_attach_property(&connector->base,
265 config->non_desktop_property,
266 0);
267
268 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
269 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
270 }
271
272 connector->debugfs_entry = NULL;
273out_put_type_id:
274 if (ret)
275 ida_simple_remove(connector_ida, connector->connector_type_id);
276out_put_id:
277 if (ret)
278 ida_simple_remove(&config->connector_ida, connector->index);
279out_put:
280 if (ret)
281 drm_mode_object_unregister(dev, &connector->base);
282
283 return ret;
284}
285EXPORT_SYMBOL(drm_connector_init);
286
287/**
288 * drm_mode_connector_attach_encoder - attach a connector to an encoder
289 * @connector: connector to attach
290 * @encoder: encoder to attach @connector to
291 *
292 * This function links up a connector to an encoder. Note that the routing
293 * restrictions between encoders and crtcs are exposed to userspace through the
294 * possible_clones and possible_crtcs bitmasks.
295 *
296 * Returns:
297 * Zero on success, negative errno on failure.
298 */
299int drm_mode_connector_attach_encoder(struct drm_connector *connector,
300 struct drm_encoder *encoder)
301{
302 int i;
303
304 /*
305 * In the past, drivers have attempted to model the static association
306 * of connector to encoder in simple connector/encoder devices using a
307 * direct assignment of connector->encoder = encoder. This connection
308 * is a logical one and the responsibility of the core, so drivers are
309 * expected not to mess with this.
310 *
311 * Note that the error return should've been enough here, but a large
312 * majority of drivers ignores the return value, so add in a big WARN
313 * to get people's attention.
314 */
315 if (WARN_ON(connector->encoder))
316 return -EINVAL;
317
318 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
319 if (connector->encoder_ids[i] == 0) {
320 connector->encoder_ids[i] = encoder->base.id;
321 return 0;
322 }
323 }
324 return -ENOMEM;
325}
326EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
327
328static void drm_mode_remove(struct drm_connector *connector,
329 struct drm_display_mode *mode)
330{
331 list_del(&mode->head);
332 drm_mode_destroy(connector->dev, mode);
333}
334
335/**
336 * drm_connector_cleanup - cleans up an initialised connector
337 * @connector: connector to cleanup
338 *
339 * Cleans up the connector but doesn't free the object.
340 */
341void drm_connector_cleanup(struct drm_connector *connector)
342{
343 struct drm_device *dev = connector->dev;
344 struct drm_display_mode *mode, *t;
345
346 /* The connector should have been removed from userspace long before
347 * it is finally destroyed.
348 */
349 if (WARN_ON(connector->registered))
350 drm_connector_unregister(connector);
351
352 if (connector->tile_group) {
353 drm_mode_put_tile_group(dev, connector->tile_group);
354 connector->tile_group = NULL;
355 }
356
357 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
358 drm_mode_remove(connector, mode);
359
360 list_for_each_entry_safe(mode, t, &connector->modes, head)
361 drm_mode_remove(connector, mode);
362
363 ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
364 connector->connector_type_id);
365
366 ida_simple_remove(&dev->mode_config.connector_ida,
367 connector->index);
368
369 kfree(connector->display_info.bus_formats);
370 drm_mode_object_unregister(dev, &connector->base);
371 kfree(connector->name);
372 connector->name = NULL;
373 spin_lock_irq(&dev->mode_config.connector_list_lock);
374 list_del(&connector->head);
375 dev->mode_config.num_connector--;
376 spin_unlock_irq(&dev->mode_config.connector_list_lock);
377
378 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
379 if (connector->state && connector->funcs->atomic_destroy_state)
380 connector->funcs->atomic_destroy_state(connector,
381 connector->state);
382
383 mutex_destroy(&connector->mutex);
384
385 memset(connector, 0, sizeof(*connector));
386}
387EXPORT_SYMBOL(drm_connector_cleanup);
388
389/**
390 * drm_connector_register - register a connector
391 * @connector: the connector to register
392 *
393 * Register userspace interfaces for a connector
394 *
395 * Returns:
396 * Zero on success, error code on failure.
397 */
398int drm_connector_register(struct drm_connector *connector)
399{
400 int ret = 0;
401
402 if (!connector->dev->registered)
403 return 0;
404
405 mutex_lock(&connector->mutex);
406 if (connector->registered)
407 goto unlock;
408
409 ret = drm_sysfs_connector_add(connector);
410 if (ret)
411 goto unlock;
412
413 ret = drm_debugfs_connector_add(connector);
414 if (ret) {
415 goto err_sysfs;
416 }
417
418 if (connector->funcs->late_register) {
419 ret = connector->funcs->late_register(connector);
420 if (ret)
421 goto err_debugfs;
422 }
423
424 drm_mode_object_register(connector->dev, &connector->base);
425
426 connector->registered = true;
427 goto unlock;
428
429err_debugfs:
430 drm_debugfs_connector_remove(connector);
431err_sysfs:
432 drm_sysfs_connector_remove(connector);
433unlock:
434 mutex_unlock(&connector->mutex);
435 return ret;
436}
437EXPORT_SYMBOL(drm_connector_register);
438
439/**
440 * drm_connector_unregister - unregister a connector
441 * @connector: the connector to unregister
442 *
443 * Unregister userspace interfaces for a connector
444 */
445void drm_connector_unregister(struct drm_connector *connector)
446{
447 mutex_lock(&connector->mutex);
448 if (!connector->registered) {
449 mutex_unlock(&connector->mutex);
450 return;
451 }
452
453 if (connector->funcs->early_unregister)
454 connector->funcs->early_unregister(connector);
455
456 drm_sysfs_connector_remove(connector);
457 drm_debugfs_connector_remove(connector);
458
459 connector->registered = false;
460 mutex_unlock(&connector->mutex);
461}
462EXPORT_SYMBOL(drm_connector_unregister);
463
464void drm_connector_unregister_all(struct drm_device *dev)
465{
466 struct drm_connector *connector;
467 struct drm_connector_list_iter conn_iter;
468
469 drm_connector_list_iter_begin(dev, &conn_iter);
470 drm_for_each_connector_iter(connector, &conn_iter)
471 drm_connector_unregister(connector);
472 drm_connector_list_iter_end(&conn_iter);
473}
474
475int drm_connector_register_all(struct drm_device *dev)
476{
477 struct drm_connector *connector;
478 struct drm_connector_list_iter conn_iter;
479 int ret = 0;
480
481 drm_connector_list_iter_begin(dev, &conn_iter);
482 drm_for_each_connector_iter(connector, &conn_iter) {
483 ret = drm_connector_register(connector);
484 if (ret)
485 break;
486 }
487 drm_connector_list_iter_end(&conn_iter);
488
489 if (ret)
490 drm_connector_unregister_all(dev);
491 return ret;
492}
493
494/**
495 * drm_get_connector_status_name - return a string for connector status
496 * @status: connector status to compute name of
497 *
498 * In contrast to the other drm_get_*_name functions this one here returns a
499 * const pointer and hence is threadsafe.
500 */
501const char *drm_get_connector_status_name(enum drm_connector_status status)
502{
503 if (status == connector_status_connected)
504 return "connected";
505 else if (status == connector_status_disconnected)
506 return "disconnected";
507 else
508 return "unknown";
509}
510EXPORT_SYMBOL(drm_get_connector_status_name);
511
512/**
513 * drm_get_connector_force_name - return a string for connector force
514 * @force: connector force to get name of
515 *
516 * Returns: const pointer to name.
517 */
518const char *drm_get_connector_force_name(enum drm_connector_force force)
519{
520 switch (force) {
521 case DRM_FORCE_UNSPECIFIED:
522 return "unspecified";
523 case DRM_FORCE_OFF:
524 return "off";
525 case DRM_FORCE_ON:
526 return "on";
527 case DRM_FORCE_ON_DIGITAL:
528 return "digital";
529 default:
530 return "unknown";
531 }
532}
533
534#ifdef CONFIG_LOCKDEP
535static struct lockdep_map connector_list_iter_dep_map = {
536 .name = "drm_connector_list_iter"
537};
538#endif
539
540/**
541 * drm_connector_list_iter_begin - initialize a connector_list iterator
542 * @dev: DRM device
543 * @iter: connector_list iterator
544 *
545 * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter
546 * must always be cleaned up again by calling drm_connector_list_iter_end().
547 * Iteration itself happens using drm_connector_list_iter_next() or
548 * drm_for_each_connector_iter().
549 */
550void drm_connector_list_iter_begin(struct drm_device *dev,
551 struct drm_connector_list_iter *iter)
552{
553 iter->dev = dev;
554 iter->conn = NULL;
555 lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_);
556}
557EXPORT_SYMBOL(drm_connector_list_iter_begin);
558
559/*
560 * Extra-safe connector put function that works in any context. Should only be
561 * used from the connector_iter functions, where we never really expect to
562 * actually release the connector when dropping our final reference.
563 */
564static void
565__drm_connector_put_safe(struct drm_connector *conn)
566{
567 struct drm_mode_config *config = &conn->dev->mode_config;
568
569 lockdep_assert_held(&config->connector_list_lock);
570
571 if (!refcount_dec_and_test(&conn->base.refcount.refcount))
572 return;
573
574 llist_add(&conn->free_node, &config->connector_free_list);
575 schedule_work(&config->connector_free_work);
576}
577
578/**
579 * drm_connector_list_iter_next - return next connector
580 * @iter: connectr_list iterator
581 *
582 * Returns the next connector for @iter, or NULL when the list walk has
583 * completed.
584 */
585struct drm_connector *
586drm_connector_list_iter_next(struct drm_connector_list_iter *iter)
587{
588 struct drm_connector *old_conn = iter->conn;
589 struct drm_mode_config *config = &iter->dev->mode_config;
590 struct list_head *lhead;
591 unsigned long flags;
592
593 spin_lock_irqsave(&config->connector_list_lock, flags);
594 lhead = old_conn ? &old_conn->head : &config->connector_list;
595
596 do {
597 if (lhead->next == &config->connector_list) {
598 iter->conn = NULL;
599 break;
600 }
601
602 lhead = lhead->next;
603 iter->conn = list_entry(lhead, struct drm_connector, head);
604
605 /* loop until it's not a zombie connector */
606 } while (!kref_get_unless_zero(&iter->conn->base.refcount));
607
608 if (old_conn)
609 __drm_connector_put_safe(old_conn);
610 spin_unlock_irqrestore(&config->connector_list_lock, flags);
611
612 return iter->conn;
613}
614EXPORT_SYMBOL(drm_connector_list_iter_next);
615
616/**
617 * drm_connector_list_iter_end - tear down a connector_list iterator
618 * @iter: connector_list iterator
619 *
620 * Tears down @iter and releases any resources (like &drm_connector references)
621 * acquired while walking the list. This must always be called, both when the
622 * iteration completes fully or when it was aborted without walking the entire
623 * list.
624 */
625void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
626{
627 struct drm_mode_config *config = &iter->dev->mode_config;
628 unsigned long flags;
629
630 iter->dev = NULL;
631 if (iter->conn) {
632 spin_lock_irqsave(&config->connector_list_lock, flags);
633 __drm_connector_put_safe(iter->conn);
634 spin_unlock_irqrestore(&config->connector_list_lock, flags);
635 }
636 lock_release(&connector_list_iter_dep_map, 0, _RET_IP_);
637}
638EXPORT_SYMBOL(drm_connector_list_iter_end);
639
640static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
641 { SubPixelUnknown, "Unknown" },
642 { SubPixelHorizontalRGB, "Horizontal RGB" },
643 { SubPixelHorizontalBGR, "Horizontal BGR" },
644 { SubPixelVerticalRGB, "Vertical RGB" },
645 { SubPixelVerticalBGR, "Vertical BGR" },
646 { SubPixelNone, "None" },
647};
648
649/**
650 * drm_get_subpixel_order_name - return a string for a given subpixel enum
651 * @order: enum of subpixel_order
652 *
653 * Note you could abuse this and return something out of bounds, but that
654 * would be a caller error. No unscrubbed user data should make it here.
655 */
656const char *drm_get_subpixel_order_name(enum subpixel_order order)
657{
658 return drm_subpixel_enum_list[order].name;
659}
660EXPORT_SYMBOL(drm_get_subpixel_order_name);
661
662static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
663 { DRM_MODE_DPMS_ON, "On" },
664 { DRM_MODE_DPMS_STANDBY, "Standby" },
665 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
666 { DRM_MODE_DPMS_OFF, "Off" }
667};
668DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
669
670static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
671 { DRM_MODE_LINK_STATUS_GOOD, "Good" },
672 { DRM_MODE_LINK_STATUS_BAD, "Bad" },
673};
674
675/**
676 * drm_display_info_set_bus_formats - set the supported bus formats
677 * @info: display info to store bus formats in
678 * @formats: array containing the supported bus formats
679 * @num_formats: the number of entries in the fmts array
680 *
681 * Store the supported bus formats in display info structure.
682 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
683 * a full list of available formats.
684 */
685int drm_display_info_set_bus_formats(struct drm_display_info *info,
686 const u32 *formats,
687 unsigned int num_formats)
688{
689 u32 *fmts = NULL;
690
691 if (!formats && num_formats)
692 return -EINVAL;
693
694 if (formats && num_formats) {
695 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
696 GFP_KERNEL);
697 if (!fmts)
698 return -ENOMEM;
699 }
700
701 kfree(info->bus_formats);
702 info->bus_formats = fmts;
703 info->num_bus_formats = num_formats;
704
705 return 0;
706}
707EXPORT_SYMBOL(drm_display_info_set_bus_formats);
708
709/* Optional connector properties. */
710static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
711 { DRM_MODE_SCALE_NONE, "None" },
712 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
713 { DRM_MODE_SCALE_CENTER, "Center" },
714 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
715};
716
717static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
718 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
719 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
720 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
721};
722
723static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = {
724 { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" },
725 { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" },
726 { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" },
727 { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" },
728};
729
730static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
731 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
732 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
733 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
734};
735DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
736
737static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
738 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
739 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
740 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
741};
742DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
743 drm_dvi_i_subconnector_enum_list)
744
745static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
746 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
747 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
748 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
749 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
750 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
751};
752DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
753
754static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
755 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
756 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
757 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
758 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
759 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
760};
761DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
762 drm_tv_subconnector_enum_list)
763
764static struct drm_prop_enum_list drm_cp_enum_list[] = {
765 { DRM_MODE_CONTENT_PROTECTION_UNDESIRED, "Undesired" },
766 { DRM_MODE_CONTENT_PROTECTION_DESIRED, "Desired" },
767 { DRM_MODE_CONTENT_PROTECTION_ENABLED, "Enabled" },
768};
769DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list)
770
771/**
772 * DOC: standard connector properties
773 *
774 * DRM connectors have a few standardized properties:
775 *
776 * EDID:
777 * Blob property which contains the current EDID read from the sink. This
778 * is useful to parse sink identification information like vendor, model
779 * and serial. Drivers should update this property by calling
780 * drm_mode_connector_update_edid_property(), usually after having parsed
781 * the EDID using drm_add_edid_modes(). Userspace cannot change this
782 * property.
783 * DPMS:
784 * Legacy property for setting the power state of the connector. For atomic
785 * drivers this is only provided for backwards compatibility with existing
786 * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
787 * connector is linked to. Drivers should never set this property directly,
788 * it is handled by the DRM core by calling the &drm_connector_funcs.dpms
789 * callback. For atomic drivers the remapping to the "ACTIVE" property is
790 * implemented in the DRM core. This is the only standard connector
791 * property that userspace can change.
792 *
793 * Note that this property cannot be set through the MODE_ATOMIC ioctl,
794 * userspace must use "ACTIVE" on the CRTC instead.
795 *
796 * WARNING:
797 *
798 * For userspace also running on legacy drivers the "DPMS" semantics are a
799 * lot more complicated. First, userspace cannot rely on the "DPMS" value
800 * returned by the GETCONNECTOR actually reflecting reality, because many
801 * drivers fail to update it. For atomic drivers this is taken care of in
802 * drm_atomic_helper_update_legacy_modeset_state().
803 *
804 * The second issue is that the DPMS state is only well-defined when the
805 * connector is connected to a CRTC. In atomic the DRM core enforces that
806 * "ACTIVE" is off in such a case, no such checks exists for "DPMS".
807 *
808 * Finally, when enabling an output using the legacy SETCONFIG ioctl then
809 * "DPMS" is forced to ON. But see above, that might not be reflected in
810 * the software value on legacy drivers.
811 *
812 * Summarizing: Only set "DPMS" when the connector is known to be enabled,
813 * assume that a successful SETCONFIG call also sets "DPMS" to on, and
814 * never read back the value of "DPMS" because it can be incorrect.
815 * PATH:
816 * Connector path property to identify how this sink is physically
817 * connected. Used by DP MST. This should be set by calling
818 * drm_mode_connector_set_path_property(), in the case of DP MST with the
819 * path property the MST manager created. Userspace cannot change this
820 * property.
821 * TILE:
822 * Connector tile group property to indicate how a set of DRM connector
823 * compose together into one logical screen. This is used by both high-res
824 * external screens (often only using a single cable, but exposing multiple
825 * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
826 * are not gen-locked. Note that for tiled panels which are genlocked, like
827 * dual-link LVDS or dual-link DSI, the driver should try to not expose the
828 * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers
829 * should update this value using drm_mode_connector_set_tile_property().
830 * Userspace cannot change this property.
831 * link-status:
832 * Connector link-status property to indicate the status of link. The
833 * default value of link-status is "GOOD". If something fails during or
834 * after modeset, the kernel driver may set this to "BAD" and issue a
835 * hotplug uevent. Drivers should update this value using
836 * drm_mode_connector_set_link_status_property().
837 * non_desktop:
838 * Indicates the output should be ignored for purposes of displaying a
839 * standard desktop environment or console. This is most likely because
840 * the output device is not rectilinear.
841 * Content Protection:
842 * This property is used by userspace to request the kernel protect future
843 * content communicated over the link. When requested, kernel will apply
844 * the appropriate means of protection (most often HDCP), and use the
845 * property to tell userspace the protection is active.
846 *
847 * Drivers can set this up by calling
848 * drm_connector_attach_content_protection_property() on initialization.
849 *
850 * The value of this property can be one of the following:
851 *
852 * DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0
853 * The link is not protected, content is transmitted in the clear.
854 * DRM_MODE_CONTENT_PROTECTION_DESIRED = 1
855 * Userspace has requested content protection, but the link is not
856 * currently protected. When in this state, kernel should enable
857 * Content Protection as soon as possible.
858 * DRM_MODE_CONTENT_PROTECTION_ENABLED = 2
859 * Userspace has requested content protection, and the link is
860 * protected. Only the driver can set the property to this value.
861 * If userspace attempts to set to ENABLED, kernel will return
862 * -EINVAL.
863 *
864 * A few guidelines:
865 *
866 * - DESIRED state should be preserved until userspace de-asserts it by
867 * setting the property to UNDESIRED. This means ENABLED should only
868 * transition to UNDESIRED when the user explicitly requests it.
869 * - If the state is DESIRED, kernel should attempt to re-authenticate the
870 * link whenever possible. This includes across disable/enable, dpms,
871 * hotplug, downstream device changes, link status failures, etc..
872 * - Userspace is responsible for polling the property to determine when
873 * the value transitions from ENABLED to DESIRED. This signifies the link
874 * is no longer protected and userspace should take appropriate action
875 * (whatever that might be).
876 *
877 * Connectors also have one standardized atomic property:
878 *
879 * CRTC_ID:
880 * Mode object ID of the &drm_crtc this connector should be connected to.
881 *
882 * Connectors for LCD panels may also have one standardized property:
883 *
884 * panel orientation:
885 * On some devices the LCD panel is mounted in the casing in such a way
886 * that the up/top side of the panel does not match with the top side of
887 * the device. Userspace can use this property to check for this.
888 * Note that input coordinates from touchscreens (input devices with
889 * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
890 * coordinates, so if userspace rotates the picture to adjust for
891 * the orientation it must also apply the same transformation to the
892 * touchscreen input coordinates. This property is initialized by calling
893 * drm_connector_init_panel_orientation_property().
894 *
895 * scaling mode:
896 * This property defines how a non-native mode is upscaled to the native
897 * mode of an LCD panel:
898 *
899 * None:
900 * No upscaling happens, scaling is left to the panel. Not all
901 * drivers expose this mode.
902 * Full:
903 * The output is upscaled to the full resolution of the panel,
904 * ignoring the aspect ratio.
905 * Center:
906 * No upscaling happens, the output is centered within the native
907 * resolution the panel.
908 * Full aspect:
909 * The output is upscaled to maximize either the width or height
910 * while retaining the aspect ratio.
911 *
912 * This property should be set up by calling
913 * drm_connector_attach_scaling_mode_property(). Note that drivers
914 * can also expose this property to external outputs, in which case they
915 * must support "None", which should be the default (since external screens
916 * have a built-in scaler).
917 */
918
919int drm_connector_create_standard_properties(struct drm_device *dev)
920{
921 struct drm_property *prop;
922
923 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
924 DRM_MODE_PROP_IMMUTABLE,
925 "EDID", 0);
926 if (!prop)
927 return -ENOMEM;
928 dev->mode_config.edid_property = prop;
929
930 prop = drm_property_create_enum(dev, 0,
931 "DPMS", drm_dpms_enum_list,
932 ARRAY_SIZE(drm_dpms_enum_list));
933 if (!prop)
934 return -ENOMEM;
935 dev->mode_config.dpms_property = prop;
936
937 prop = drm_property_create(dev,
938 DRM_MODE_PROP_BLOB |
939 DRM_MODE_PROP_IMMUTABLE,
940 "PATH", 0);
941 if (!prop)
942 return -ENOMEM;
943 dev->mode_config.path_property = prop;
944
945 prop = drm_property_create(dev,
946 DRM_MODE_PROP_BLOB |
947 DRM_MODE_PROP_IMMUTABLE,
948 "TILE", 0);
949 if (!prop)
950 return -ENOMEM;
951 dev->mode_config.tile_property = prop;
952
953 prop = drm_property_create_enum(dev, 0, "link-status",
954 drm_link_status_enum_list,
955 ARRAY_SIZE(drm_link_status_enum_list));
956 if (!prop)
957 return -ENOMEM;
958 dev->mode_config.link_status_property = prop;
959
960 prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop");
961 if (!prop)
962 return -ENOMEM;
963 dev->mode_config.non_desktop_property = prop;
964
965 return 0;
966}
967
968/**
969 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
970 * @dev: DRM device
971 *
972 * Called by a driver the first time a DVI-I connector is made.
973 */
974int drm_mode_create_dvi_i_properties(struct drm_device *dev)
975{
976 struct drm_property *dvi_i_selector;
977 struct drm_property *dvi_i_subconnector;
978
979 if (dev->mode_config.dvi_i_select_subconnector_property)
980 return 0;
981
982 dvi_i_selector =
983 drm_property_create_enum(dev, 0,
984 "select subconnector",
985 drm_dvi_i_select_enum_list,
986 ARRAY_SIZE(drm_dvi_i_select_enum_list));
987 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
988
989 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
990 "subconnector",
991 drm_dvi_i_subconnector_enum_list,
992 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
993 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
994
995 return 0;
996}
997EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
998
999/**
1000 * drm_create_tv_properties - create TV specific connector properties
1001 * @dev: DRM device
1002 * @num_modes: number of different TV formats (modes) supported
1003 * @modes: array of pointers to strings containing name of each format
1004 *
1005 * Called by a driver's TV initialization routine, this function creates
1006 * the TV specific connector properties for a given device. Caller is
1007 * responsible for allocating a list of format names and passing them to
1008 * this routine.
1009 */
1010int drm_mode_create_tv_properties(struct drm_device *dev,
1011 unsigned int num_modes,
1012 const char * const modes[])
1013{
1014 struct drm_property *tv_selector;
1015 struct drm_property *tv_subconnector;
1016 unsigned int i;
1017
1018 if (dev->mode_config.tv_select_subconnector_property)
1019 return 0;
1020
1021 /*
1022 * Basic connector properties
1023 */
1024 tv_selector = drm_property_create_enum(dev, 0,
1025 "select subconnector",
1026 drm_tv_select_enum_list,
1027 ARRAY_SIZE(drm_tv_select_enum_list));
1028 if (!tv_selector)
1029 goto nomem;
1030
1031 dev->mode_config.tv_select_subconnector_property = tv_selector;
1032
1033 tv_subconnector =
1034 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1035 "subconnector",
1036 drm_tv_subconnector_enum_list,
1037 ARRAY_SIZE(drm_tv_subconnector_enum_list));
1038 if (!tv_subconnector)
1039 goto nomem;
1040 dev->mode_config.tv_subconnector_property = tv_subconnector;
1041
1042 /*
1043 * Other, TV specific properties: margins & TV modes.
1044 */
1045 dev->mode_config.tv_left_margin_property =
1046 drm_property_create_range(dev, 0, "left margin", 0, 100);
1047 if (!dev->mode_config.tv_left_margin_property)
1048 goto nomem;
1049
1050 dev->mode_config.tv_right_margin_property =
1051 drm_property_create_range(dev, 0, "right margin", 0, 100);
1052 if (!dev->mode_config.tv_right_margin_property)
1053 goto nomem;
1054
1055 dev->mode_config.tv_top_margin_property =
1056 drm_property_create_range(dev, 0, "top margin", 0, 100);
1057 if (!dev->mode_config.tv_top_margin_property)
1058 goto nomem;
1059
1060 dev->mode_config.tv_bottom_margin_property =
1061 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1062 if (!dev->mode_config.tv_bottom_margin_property)
1063 goto nomem;
1064
1065 dev->mode_config.tv_mode_property =
1066 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1067 "mode", num_modes);
1068 if (!dev->mode_config.tv_mode_property)
1069 goto nomem;
1070
1071 for (i = 0; i < num_modes; i++)
1072 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
1073 i, modes[i]);
1074
1075 dev->mode_config.tv_brightness_property =
1076 drm_property_create_range(dev, 0, "brightness", 0, 100);
1077 if (!dev->mode_config.tv_brightness_property)
1078 goto nomem;
1079
1080 dev->mode_config.tv_contrast_property =
1081 drm_property_create_range(dev, 0, "contrast", 0, 100);
1082 if (!dev->mode_config.tv_contrast_property)
1083 goto nomem;
1084
1085 dev->mode_config.tv_flicker_reduction_property =
1086 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1087 if (!dev->mode_config.tv_flicker_reduction_property)
1088 goto nomem;
1089
1090 dev->mode_config.tv_overscan_property =
1091 drm_property_create_range(dev, 0, "overscan", 0, 100);
1092 if (!dev->mode_config.tv_overscan_property)
1093 goto nomem;
1094
1095 dev->mode_config.tv_saturation_property =
1096 drm_property_create_range(dev, 0, "saturation", 0, 100);
1097 if (!dev->mode_config.tv_saturation_property)
1098 goto nomem;
1099
1100 dev->mode_config.tv_hue_property =
1101 drm_property_create_range(dev, 0, "hue", 0, 100);
1102 if (!dev->mode_config.tv_hue_property)
1103 goto nomem;
1104
1105 return 0;
1106nomem:
1107 return -ENOMEM;
1108}
1109EXPORT_SYMBOL(drm_mode_create_tv_properties);
1110
1111/**
1112 * drm_mode_create_scaling_mode_property - create scaling mode property
1113 * @dev: DRM device
1114 *
1115 * Called by a driver the first time it's needed, must be attached to desired
1116 * connectors.
1117 *
1118 * Atomic drivers should use drm_connector_attach_scaling_mode_property()
1119 * instead to correctly assign &drm_connector_state.picture_aspect_ratio
1120 * in the atomic state.
1121 */
1122int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1123{
1124 struct drm_property *scaling_mode;
1125
1126 if (dev->mode_config.scaling_mode_property)
1127 return 0;
1128
1129 scaling_mode =
1130 drm_property_create_enum(dev, 0, "scaling mode",
1131 drm_scaling_mode_enum_list,
1132 ARRAY_SIZE(drm_scaling_mode_enum_list));
1133
1134 dev->mode_config.scaling_mode_property = scaling_mode;
1135
1136 return 0;
1137}
1138EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1139
1140/**
1141 * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property
1142 * @connector: connector to attach scaling mode property on.
1143 * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*).
1144 *
1145 * This is used to add support for scaling mode to atomic drivers.
1146 * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio
1147 * and can be used from &drm_connector_helper_funcs->atomic_check for validation.
1148 *
1149 * This is the atomic version of drm_mode_create_scaling_mode_property().
1150 *
1151 * Returns:
1152 * Zero on success, negative errno on failure.
1153 */
1154int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
1155 u32 scaling_mode_mask)
1156{
1157 struct drm_device *dev = connector->dev;
1158 struct drm_property *scaling_mode_property;
1159 int i, j = 0;
1160 const unsigned valid_scaling_mode_mask =
1161 (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1;
1162
1163 if (WARN_ON(hweight32(scaling_mode_mask) < 2 ||
1164 scaling_mode_mask & ~valid_scaling_mode_mask))
1165 return -EINVAL;
1166
1167 scaling_mode_property =
1168 drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
1169 hweight32(scaling_mode_mask));
1170
1171 if (!scaling_mode_property)
1172 return -ENOMEM;
1173
1174 for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) {
1175 int ret;
1176
1177 if (!(BIT(i) & scaling_mode_mask))
1178 continue;
1179
1180 ret = drm_property_add_enum(scaling_mode_property, j++,
1181 drm_scaling_mode_enum_list[i].type,
1182 drm_scaling_mode_enum_list[i].name);
1183
1184 if (ret) {
1185 drm_property_destroy(dev, scaling_mode_property);
1186
1187 return ret;
1188 }
1189 }
1190
1191 drm_object_attach_property(&connector->base,
1192 scaling_mode_property, 0);
1193
1194 connector->scaling_mode_property = scaling_mode_property;
1195
1196 return 0;
1197}
1198EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property);
1199
1200/**
1201 * drm_connector_attach_content_protection_property - attach content protection
1202 * property
1203 *
1204 * @connector: connector to attach CP property on.
1205 *
1206 * This is used to add support for content protection on select connectors.
1207 * Content Protection is intentionally vague to allow for different underlying
1208 * technologies, however it is most implemented by HDCP.
1209 *
1210 * The content protection will be set to &drm_connector_state.content_protection
1211 *
1212 * Returns:
1213 * Zero on success, negative errno on failure.
1214 */
1215int drm_connector_attach_content_protection_property(
1216 struct drm_connector *connector)
1217{
1218 struct drm_device *dev = connector->dev;
1219 struct drm_property *prop;
1220
1221 prop = drm_property_create_enum(dev, 0, "Content Protection",
1222 drm_cp_enum_list,
1223 ARRAY_SIZE(drm_cp_enum_list));
1224 if (!prop)
1225 return -ENOMEM;
1226
1227 drm_object_attach_property(&connector->base, prop,
1228 DRM_MODE_CONTENT_PROTECTION_UNDESIRED);
1229
1230 connector->content_protection_property = prop;
1231
1232 return 0;
1233}
1234EXPORT_SYMBOL(drm_connector_attach_content_protection_property);
1235
1236/**
1237 * drm_mode_create_aspect_ratio_property - create aspect ratio property
1238 * @dev: DRM device
1239 *
1240 * Called by a driver the first time it's needed, must be attached to desired
1241 * connectors.
1242 *
1243 * Returns:
1244 * Zero on success, negative errno on failure.
1245 */
1246int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1247{
1248 if (dev->mode_config.aspect_ratio_property)
1249 return 0;
1250
1251 dev->mode_config.aspect_ratio_property =
1252 drm_property_create_enum(dev, 0, "aspect ratio",
1253 drm_aspect_ratio_enum_list,
1254 ARRAY_SIZE(drm_aspect_ratio_enum_list));
1255
1256 if (dev->mode_config.aspect_ratio_property == NULL)
1257 return -ENOMEM;
1258
1259 return 0;
1260}
1261EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1262
1263/**
1264 * drm_mode_create_suggested_offset_properties - create suggests offset properties
1265 * @dev: DRM device
1266 *
1267 * Create the the suggested x/y offset property for connectors.
1268 */
1269int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1270{
1271 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1272 return 0;
1273
1274 dev->mode_config.suggested_x_property =
1275 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1276
1277 dev->mode_config.suggested_y_property =
1278 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1279
1280 if (dev->mode_config.suggested_x_property == NULL ||
1281 dev->mode_config.suggested_y_property == NULL)
1282 return -ENOMEM;
1283 return 0;
1284}
1285EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1286
1287/**
1288 * drm_mode_connector_set_path_property - set tile property on connector
1289 * @connector: connector to set property on.
1290 * @path: path to use for property; must not be NULL.
1291 *
1292 * This creates a property to expose to userspace to specify a
1293 * connector path. This is mainly used for DisplayPort MST where
1294 * connectors have a topology and we want to allow userspace to give
1295 * them more meaningful names.
1296 *
1297 * Returns:
1298 * Zero on success, negative errno on failure.
1299 */
1300int drm_mode_connector_set_path_property(struct drm_connector *connector,
1301 const char *path)
1302{
1303 struct drm_device *dev = connector->dev;
1304 int ret;
1305
1306 ret = drm_property_replace_global_blob(dev,
1307 &connector->path_blob_ptr,
1308 strlen(path) + 1,
1309 path,
1310 &connector->base,
1311 dev->mode_config.path_property);
1312 return ret;
1313}
1314EXPORT_SYMBOL(drm_mode_connector_set_path_property);
1315
1316/**
1317 * drm_mode_connector_set_tile_property - set tile property on connector
1318 * @connector: connector to set property on.
1319 *
1320 * This looks up the tile information for a connector, and creates a
1321 * property for userspace to parse if it exists. The property is of
1322 * the form of 8 integers using ':' as a separator.
1323 *
1324 * Returns:
1325 * Zero on success, errno on failure.
1326 */
1327int drm_mode_connector_set_tile_property(struct drm_connector *connector)
1328{
1329 struct drm_device *dev = connector->dev;
1330 char tile[256];
1331 int ret;
1332
1333 if (!connector->has_tile) {
1334 ret = drm_property_replace_global_blob(dev,
1335 &connector->tile_blob_ptr,
1336 0,
1337 NULL,
1338 &connector->base,
1339 dev->mode_config.tile_property);
1340 return ret;
1341 }
1342
1343 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
1344 connector->tile_group->id, connector->tile_is_single_monitor,
1345 connector->num_h_tile, connector->num_v_tile,
1346 connector->tile_h_loc, connector->tile_v_loc,
1347 connector->tile_h_size, connector->tile_v_size);
1348
1349 ret = drm_property_replace_global_blob(dev,
1350 &connector->tile_blob_ptr,
1351 strlen(tile) + 1,
1352 tile,
1353 &connector->base,
1354 dev->mode_config.tile_property);
1355 return ret;
1356}
1357EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
1358
1359/**
1360 * drm_mode_connector_update_edid_property - update the edid property of a connector
1361 * @connector: drm connector
1362 * @edid: new value of the edid property
1363 *
1364 * This function creates a new blob modeset object and assigns its id to the
1365 * connector's edid property.
1366 *
1367 * Returns:
1368 * Zero on success, negative errno on failure.
1369 */
1370int drm_mode_connector_update_edid_property(struct drm_connector *connector,
1371 const struct edid *edid)
1372{
1373 struct drm_device *dev = connector->dev;
1374 size_t size = 0;
1375 int ret;
1376
1377 /* ignore requests to set edid when overridden */
1378 if (connector->override_edid)
1379 return 0;
1380
1381 if (edid)
1382 size = EDID_LENGTH * (1 + edid->extensions);
1383
1384 /* Set the display info, using edid if available, otherwise
1385 * reseting the values to defaults. This duplicates the work
1386 * done in drm_add_edid_modes, but that function is not
1387 * consistently called before this one in all drivers and the
1388 * computation is cheap enough that it seems better to
1389 * duplicate it rather than attempt to ensure some arbitrary
1390 * ordering of calls.
1391 */
1392 if (edid)
1393 drm_add_display_info(connector, edid);
1394 else
1395 drm_reset_display_info(connector);
1396
1397 drm_object_property_set_value(&connector->base,
1398 dev->mode_config.non_desktop_property,
1399 connector->display_info.non_desktop);
1400
1401 ret = drm_property_replace_global_blob(dev,
1402 &connector->edid_blob_ptr,
1403 size,
1404 edid,
1405 &connector->base,
1406 dev->mode_config.edid_property);
1407 return ret;
1408}
1409EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
1410
1411/**
1412 * drm_mode_connector_set_link_status_property - Set link status property of a connector
1413 * @connector: drm connector
1414 * @link_status: new value of link status property (0: Good, 1: Bad)
1415 *
1416 * In usual working scenario, this link status property will always be set to
1417 * "GOOD". If something fails during or after a mode set, the kernel driver
1418 * may set this link status property to "BAD". The caller then needs to send a
1419 * hotplug uevent for userspace to re-check the valid modes through
1420 * GET_CONNECTOR_IOCTL and retry modeset.
1421 *
1422 * Note: Drivers cannot rely on userspace to support this property and
1423 * issue a modeset. As such, they may choose to handle issues (like
1424 * re-training a link) without userspace's intervention.
1425 *
1426 * The reason for adding this property is to handle link training failures, but
1427 * it is not limited to DP or link training. For example, if we implement
1428 * asynchronous setcrtc, this property can be used to report any failures in that.
1429 */
1430void drm_mode_connector_set_link_status_property(struct drm_connector *connector,
1431 uint64_t link_status)
1432{
1433 struct drm_device *dev = connector->dev;
1434
1435 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1436 connector->state->link_status = link_status;
1437 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1438}
1439EXPORT_SYMBOL(drm_mode_connector_set_link_status_property);
1440
1441/**
1442 * drm_connector_init_panel_orientation_property -
1443 * initialize the connecters panel_orientation property
1444 * @connector: connector for which to init the panel-orientation property.
1445 * @width: width in pixels of the panel, used for panel quirk detection
1446 * @height: height in pixels of the panel, used for panel quirk detection
1447 *
1448 * This function should only be called for built-in panels, after setting
1449 * connector->display_info.panel_orientation first (if known).
1450 *
1451 * This function will check for platform specific (e.g. DMI based) quirks
1452 * overriding display_info.panel_orientation first, then if panel_orientation
1453 * is not DRM_MODE_PANEL_ORIENTATION_UNKNOWN it will attach the
1454 * "panel orientation" property to the connector.
1455 *
1456 * Returns:
1457 * Zero on success, negative errno on failure.
1458 */
1459int drm_connector_init_panel_orientation_property(
1460 struct drm_connector *connector, int width, int height)
1461{
1462 struct drm_device *dev = connector->dev;
1463 struct drm_display_info *info = &connector->display_info;
1464 struct drm_property *prop;
1465 int orientation_quirk;
1466
1467 orientation_quirk = drm_get_panel_orientation_quirk(width, height);
1468 if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
1469 info->panel_orientation = orientation_quirk;
1470
1471 if (info->panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
1472 return 0;
1473
1474 prop = dev->mode_config.panel_orientation_property;
1475 if (!prop) {
1476 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1477 "panel orientation",
1478 drm_panel_orientation_enum_list,
1479 ARRAY_SIZE(drm_panel_orientation_enum_list));
1480 if (!prop)
1481 return -ENOMEM;
1482
1483 dev->mode_config.panel_orientation_property = prop;
1484 }
1485
1486 drm_object_attach_property(&connector->base, prop,
1487 info->panel_orientation);
1488 return 0;
1489}
1490EXPORT_SYMBOL(drm_connector_init_panel_orientation_property);
1491
1492int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
1493 struct drm_property *property,
1494 uint64_t value)
1495{
1496 int ret = -EINVAL;
1497 struct drm_connector *connector = obj_to_connector(obj);
1498
1499 /* Do DPMS ourselves */
1500 if (property == connector->dev->mode_config.dpms_property) {
1501 ret = (*connector->funcs->dpms)(connector, (int)value);
1502 } else if (connector->funcs->set_property)
1503 ret = connector->funcs->set_property(connector, property, value);
1504
1505 if (!ret)
1506 drm_object_property_set_value(&connector->base, property, value);
1507 return ret;
1508}
1509
1510int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
1511 void *data, struct drm_file *file_priv)
1512{
1513 struct drm_mode_connector_set_property *conn_set_prop = data;
1514 struct drm_mode_obj_set_property obj_set_prop = {
1515 .value = conn_set_prop->value,
1516 .prop_id = conn_set_prop->prop_id,
1517 .obj_id = conn_set_prop->connector_id,
1518 .obj_type = DRM_MODE_OBJECT_CONNECTOR
1519 };
1520
1521 /* It does all the locking and checking we need */
1522 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
1523}
1524
1525static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
1526{
1527 /* For atomic drivers only state objects are synchronously updated and
1528 * protected by modeset locks, so check those first. */
1529 if (connector->state)
1530 return connector->state->best_encoder;
1531 return connector->encoder;
1532}
1533
1534static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1535 const struct drm_file *file_priv)
1536{
1537 /*
1538 * If user-space hasn't configured the driver to expose the stereo 3D
1539 * modes, don't expose them.
1540 */
1541 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1542 return false;
1543
1544 return true;
1545}
1546
1547int drm_mode_getconnector(struct drm_device *dev, void *data,
1548 struct drm_file *file_priv)
1549{
1550 struct drm_mode_get_connector *out_resp = data;
1551 struct drm_connector *connector;
1552 struct drm_encoder *encoder;
1553 struct drm_display_mode *mode;
1554 int mode_count = 0;
1555 int encoders_count = 0;
1556 int ret = 0;
1557 int copied = 0;
1558 int i;
1559 struct drm_mode_modeinfo u_mode;
1560 struct drm_mode_modeinfo __user *mode_ptr;
1561 uint32_t __user *encoder_ptr;
1562
1563 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1564 return -EINVAL;
1565
1566 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1567
1568 connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id);
1569 if (!connector)
1570 return -ENOENT;
1571
1572 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
1573 if (connector->encoder_ids[i] != 0)
1574 encoders_count++;
1575
1576 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1577 copied = 0;
1578 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1579 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1580 if (connector->encoder_ids[i] != 0) {
1581 if (put_user(connector->encoder_ids[i],
1582 encoder_ptr + copied)) {
1583 ret = -EFAULT;
1584 goto out;
1585 }
1586 copied++;
1587 }
1588 }
1589 }
1590 out_resp->count_encoders = encoders_count;
1591
1592 out_resp->connector_id = connector->base.id;
1593 out_resp->connector_type = connector->connector_type;
1594 out_resp->connector_type_id = connector->connector_type_id;
1595
1596 mutex_lock(&dev->mode_config.mutex);
1597 if (out_resp->count_modes == 0) {
1598 connector->funcs->fill_modes(connector,
1599 dev->mode_config.max_width,
1600 dev->mode_config.max_height);
1601 }
1602
1603 out_resp->mm_width = connector->display_info.width_mm;
1604 out_resp->mm_height = connector->display_info.height_mm;
1605 out_resp->subpixel = connector->display_info.subpixel_order;
1606 out_resp->connection = connector->status;
1607
1608 /* delayed so we get modes regardless of pre-fill_modes state */
1609 list_for_each_entry(mode, &connector->modes, head)
1610 if (drm_mode_expose_to_userspace(mode, file_priv))
1611 mode_count++;
1612
1613 /*
1614 * This ioctl is called twice, once to determine how much space is
1615 * needed, and the 2nd time to fill it.
1616 */
1617 if ((out_resp->count_modes >= mode_count) && mode_count) {
1618 copied = 0;
1619 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1620 list_for_each_entry(mode, &connector->modes, head) {
1621 if (!drm_mode_expose_to_userspace(mode, file_priv))
1622 continue;
1623
1624 drm_mode_convert_to_umode(&u_mode, mode);
1625 if (copy_to_user(mode_ptr + copied,
1626 &u_mode, sizeof(u_mode))) {
1627 ret = -EFAULT;
1628 mutex_unlock(&dev->mode_config.mutex);
1629
1630 goto out;
1631 }
1632 copied++;
1633 }
1634 }
1635 out_resp->count_modes = mode_count;
1636 mutex_unlock(&dev->mode_config.mutex);
1637
1638 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1639 encoder = drm_connector_get_encoder(connector);
1640 if (encoder)
1641 out_resp->encoder_id = encoder->base.id;
1642 else
1643 out_resp->encoder_id = 0;
1644
1645 /* Only grab properties after probing, to make sure EDID and other
1646 * properties reflect the latest status. */
1647 ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
1648 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
1649 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
1650 &out_resp->count_props);
1651 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1652
1653out:
1654 drm_connector_put(connector);
1655
1656 return ret;
1657}
1658
1659
1660/**
1661 * DOC: Tile group
1662 *
1663 * Tile groups are used to represent tiled monitors with a unique integer
1664 * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
1665 * we store this in a tile group, so we have a common identifier for all tiles
1666 * in a monitor group. The property is called "TILE". Drivers can manage tile
1667 * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
1668 * drm_mode_get_tile_group(). But this is only needed for internal panels where
1669 * the tile group information is exposed through a non-standard way.
1670 */
1671
1672static void drm_tile_group_free(struct kref *kref)
1673{
1674 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
1675 struct drm_device *dev = tg->dev;
1676 mutex_lock(&dev->mode_config.idr_mutex);
1677 idr_remove(&dev->mode_config.tile_idr, tg->id);
1678 mutex_unlock(&dev->mode_config.idr_mutex);
1679 kfree(tg);
1680}
1681
1682/**
1683 * drm_mode_put_tile_group - drop a reference to a tile group.
1684 * @dev: DRM device
1685 * @tg: tile group to drop reference to.
1686 *
1687 * drop reference to tile group and free if 0.
1688 */
1689void drm_mode_put_tile_group(struct drm_device *dev,
1690 struct drm_tile_group *tg)
1691{
1692 kref_put(&tg->refcount, drm_tile_group_free);
1693}
1694EXPORT_SYMBOL(drm_mode_put_tile_group);
1695
1696/**
1697 * drm_mode_get_tile_group - get a reference to an existing tile group
1698 * @dev: DRM device
1699 * @topology: 8-bytes unique per monitor.
1700 *
1701 * Use the unique bytes to get a reference to an existing tile group.
1702 *
1703 * RETURNS:
1704 * tile group or NULL if not found.
1705 */
1706struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
1707 char topology[8])
1708{
1709 struct drm_tile_group *tg;
1710 int id;
1711 mutex_lock(&dev->mode_config.idr_mutex);
1712 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
1713 if (!memcmp(tg->group_data, topology, 8)) {
1714 if (!kref_get_unless_zero(&tg->refcount))
1715 tg = NULL;
1716 mutex_unlock(&dev->mode_config.idr_mutex);
1717 return tg;
1718 }
1719 }
1720 mutex_unlock(&dev->mode_config.idr_mutex);
1721 return NULL;
1722}
1723EXPORT_SYMBOL(drm_mode_get_tile_group);
1724
1725/**
1726 * drm_mode_create_tile_group - create a tile group from a displayid description
1727 * @dev: DRM device
1728 * @topology: 8-bytes unique per monitor.
1729 *
1730 * Create a tile group for the unique monitor, and get a unique
1731 * identifier for the tile group.
1732 *
1733 * RETURNS:
1734 * new tile group or error.
1735 */
1736struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
1737 char topology[8])
1738{
1739 struct drm_tile_group *tg;
1740 int ret;
1741
1742 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
1743 if (!tg)
1744 return ERR_PTR(-ENOMEM);
1745
1746 kref_init(&tg->refcount);
1747 memcpy(tg->group_data, topology, 8);
1748 tg->dev = dev;
1749
1750 mutex_lock(&dev->mode_config.idr_mutex);
1751 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
1752 if (ret >= 0) {
1753 tg->id = ret;
1754 } else {
1755 kfree(tg);
1756 tg = ERR_PTR(ret);
1757 }
1758
1759 mutex_unlock(&dev->mode_config.idr_mutex);
1760 return tg;
1761}
1762EXPORT_SYMBOL(drm_mode_create_tile_group);