drivers/gpu/drm/drm_connector.c

   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
  27 #include "drm_crtc_internal.h"
  28 #include "drm_internal.h"
  29
  30 /**
  31  * DOC: overview
  32  *
  33  * In DRM connectors are the general abstraction for display sinks, and include
  34  * als fixed panels or anything else that can display pixels in some form. As
  35  * opposed to all other KMS objects representing hardware (like CRTC, encoder or
  36  * plane abstractions) connectors can be hotplugged and unplugged at runtime.
  37  * Hence they are reference-counted using drm_connector_reference() and
  38  * drm_connector_unreference().
  39  *
  40  * KMS driver must create, initialize, register and attach at a struct
  41  * &drm_connector for each such sink. The instance is created as other KMS
  42  * objects and initialized by setting the following fields.
  43  *
  44  * The connector is then registered with a call to drm_connector_init() with a
  45  * pointer to the connector functions and a connector type, and exposed through
  46  * sysfs with a call to drm_connector_register().
  47  *
  48  * Connectors must be attached to an encoder to be used. For devices that map
  49  * connectors to encoders 1:1, the connector should be attached at
  50  * initialization time with a call to drm_mode_connector_attach_encoder(). The
  51  * driver must also set the struct &drm_connector encoder field to point to the
  52  * attached encoder.
  53  *
  54  * For connectors which are not fixed (like built-in panels) the driver needs to
  55  * support hotplug notifications. The simplest way to do that is by using the
  56  * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have
  57  * hardware support for hotplug interrupts. Connectors with hardware hotplug
  58  * support can instead use e.g. drm_helper_hpd_irq_event().
  59  */
  60
  61 struct drm_conn_prop_enum_list {
  62         int type;
  63         const char *name;
  64         struct ida ida;
  65 };
  66
  67 /*
  68  * Connector and encoder types.
  69  */
  70 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
  71         { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
  72         { DRM_MODE_CONNECTOR_VGA, "VGA" },
  73         { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
  74         { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
  75         { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
  76         { DRM_MODE_CONNECTOR_Composite, "Composite" },
  77         { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
  78         { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
  79         { DRM_MODE_CONNECTOR_Component, "Component" },
  80         { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
  81         { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
  82         { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
  83         { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
  84         { DRM_MODE_CONNECTOR_TV, "TV" },
  85         { DRM_MODE_CONNECTOR_eDP, "eDP" },
  86         { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
  87         { DRM_MODE_CONNECTOR_DSI, "DSI" },
  88         { DRM_MODE_CONNECTOR_DPI, "DPI" },
  89 };
  90
  91 void drm_connector_ida_init(void)
  92 {
  93         int i;
  94
  95         for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
  96                 ida_init(&drm_connector_enum_list[i].ida);
  97 }
  98
  99 void drm_connector_ida_destroy(void)
 100 {
 101         int i;
 102
 103         for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
 104                 ida_destroy(&drm_connector_enum_list[i].ida);
 105 }
 106
 107 /**
 108  * drm_connector_get_cmdline_mode - reads the user's cmdline mode
 109  * @connector: connector to quwery
 110  *
 111  * The kernel supports per-connector configuration of its consoles through
 112  * use of the video= parameter. This function parses that option and
 113  * extracts the user's specified mode (or enable/disable status) for a
 114  * particular connector. This is typically only used during the early fbdev
 115  * setup.
 116  */
 117 static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
 118 {
 119         struct drm_cmdline_mode *mode = &connector->cmdline_mode;
 120         char *option = NULL;
 121
 122         if (fb_get_options(connector->name, &option))
 123                 return;
 124
 125         if (!drm_mode_parse_command_line_for_connector(option,
 126                                                        connector,
 127                                                        mode))
 128                 return;
 129
 130         if (mode->force) {
 131                 const char *s;
 132
 133                 switch (mode->force) {
 134                 case DRM_FORCE_OFF:
 135                         s = "OFF";
 136                         break;
 137                 case DRM_FORCE_ON_DIGITAL:
 138                         s = "ON - dig";
 139                         break;
 140                 default:
 141                 case DRM_FORCE_ON:
 142                         s = "ON";
 143                         break;
 144                 }
 145
 146                 DRM_INFO("forcing %s connector %s\n", connector->name, s);
 147                 connector->force = mode->force;
 148         }
 149
 150         DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
 151                       connector->name,
 152                       mode->xres, mode->yres,
 153                       mode->refresh_specified ? mode->refresh : 60,
 154                       mode->rb ? " reduced blanking" : "",
 155                       mode->margins ? " with margins" : "",
 156                       mode->interlace ?  " interlaced" : "");
 157 }
 158
 159 static void drm_connector_free(struct kref *kref)
 160 {
 161         struct drm_connector *connector =
 162                 container_of(kref, struct drm_connector, base.refcount);
 163         struct drm_device *dev = connector->dev;
 164
 165         drm_mode_object_unregister(dev, &connector->base);
 166         connector->funcs->destroy(connector);
 167 }
 168
 169 /**
 170  * drm_connector_init - Init a preallocated connector
 171  * @dev: DRM device
 172  * @connector: the connector to init
 173  * @funcs: callbacks for this connector
 174  * @connector_type: user visible type of the connector
 175  *
 176  * Initialises a preallocated connector. Connectors should be
 177  * subclassed as part of driver connector objects.
 178  *
 179  * Returns:
 180  * Zero on success, error code on failure.
 181  */
 182 int drm_connector_init(struct drm_device *dev,
 183                        struct drm_connector *connector,
 184                        const struct drm_connector_funcs *funcs,
 185                        int connector_type)
 186 {
 187         struct drm_mode_config *config = &dev->mode_config;
 188         int ret;
 189         struct ida *connector_ida =
 190                 &drm_connector_enum_list[connector_type].ida;
 191
 192         drm_modeset_lock_all(dev);
 193
 194         ret = drm_mode_object_get_reg(dev, &connector->base,
 195                                       DRM_MODE_OBJECT_CONNECTOR,
 196                                       false, drm_connector_free);
 197         if (ret)
 198                 goto out_unlock;
 199
 200         connector->base.properties = &connector->properties;
 201         connector->dev = dev;
 202         connector->funcs = funcs;
 203
 204         ret = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL);
 205         if (ret < 0)
 206                 goto out_put;
 207         connector->index = ret;
 208         ret = 0;
 209
 210         connector->connector_type = connector_type;
 211         connector->connector_type_id =
 212                 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
 213         if (connector->connector_type_id < 0) {
 214                 ret = connector->connector_type_id;
 215                 goto out_put_id;
 216         }
 217         connector->name =
 218                 kasprintf(GFP_KERNEL, "%s-%d",
 219                           drm_connector_enum_list[connector_type].name,
 220                           connector->connector_type_id);
 221         if (!connector->name) {
 222                 ret = -ENOMEM;
 223                 goto out_put_type_id;
 224         }
 225
 226         INIT_LIST_HEAD(&connector->probed_modes);
 227         INIT_LIST_HEAD(&connector->modes);
 228         connector->edid_blob_ptr = NULL;
 229         connector->status = connector_status_unknown;
 230
 231         drm_connector_get_cmdline_mode(connector);
 232
 233         /* We should add connectors at the end to avoid upsetting the connector
 234          * index too much. */
 235         list_add_tail(&connector->head, &config->connector_list);
 236         config->num_connector++;
 237
 238         if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
 239                 drm_object_attach_property(&connector->base,
 240                                               config->edid_property,
 241                                               0);
 242
 243         drm_object_attach_property(&connector->base,
 244                                       config->dpms_property, 0);
 245
 246         if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
 247                 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
 248         }
 249
 250         connector->debugfs_entry = NULL;
 251 out_put_type_id:
 252         if (ret)
 253                 ida_remove(connector_ida, connector->connector_type_id);
 254 out_put_id:
 255         if (ret)
 256                 ida_remove(&config->connector_ida, connector->index);
 257 out_put:
 258         if (ret)
 259                 drm_mode_object_unregister(dev, &connector->base);
 260
 261 out_unlock:
 262         drm_modeset_unlock_all(dev);
 263
 264         return ret;
 265 }
 266 EXPORT_SYMBOL(drm_connector_init);
 267
 268 /**
 269  * drm_mode_connector_attach_encoder - attach a connector to an encoder
 270  * @connector: connector to attach
 271  * @encoder: encoder to attach @connector to
 272  *
 273  * This function links up a connector to an encoder. Note that the routing
 274  * restrictions between encoders and crtcs are exposed to userspace through the
 275  * possible_clones and possible_crtcs bitmasks.
 276  *
 277  * Returns:
 278  * Zero on success, negative errno on failure.
 279  */
 280 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
 281                                       struct drm_encoder *encoder)
 282 {
 283         int i;
 284
 285         /*
 286          * In the past, drivers have attempted to model the static association
 287          * of connector to encoder in simple connector/encoder devices using a
 288          * direct assignment of connector->encoder = encoder. This connection
 289          * is a logical one and the responsibility of the core, so drivers are
 290          * expected not to mess with this.
 291          *
 292          * Note that the error return should've been enough here, but a large
 293          * majority of drivers ignores the return value, so add in a big WARN
 294          * to get people's attention.
 295          */
 296         if (WARN_ON(connector->encoder))
 297                 return -EINVAL;
 298
 299         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
 300                 if (connector->encoder_ids[i] == 0) {
 301                         connector->encoder_ids[i] = encoder->base.id;
 302                         return 0;
 303                 }
 304         }
 305         return -ENOMEM;
 306 }
 307 EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
 308
 309 static void drm_mode_remove(struct drm_connector *connector,
 310                             struct drm_display_mode *mode)
 311 {
 312         list_del(&mode->head);
 313         drm_mode_destroy(connector->dev, mode);
 314 }
 315
 316 /**
 317  * drm_connector_cleanup - cleans up an initialised connector
 318  * @connector: connector to cleanup
 319  *
 320  * Cleans up the connector but doesn't free the object.
 321  */
 322 void drm_connector_cleanup(struct drm_connector *connector)
 323 {
 324         struct drm_device *dev = connector->dev;
 325         struct drm_display_mode *mode, *t;
 326
 327         /* The connector should have been removed from userspace long before
 328          * it is finally destroyed.
 329          */
 330         if (WARN_ON(connector->registered))
 331                 drm_connector_unregister(connector);
 332
 333         if (connector->tile_group) {
 334                 drm_mode_put_tile_group(dev, connector->tile_group);
 335                 connector->tile_group = NULL;
 336         }
 337
 338         list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
 339                 drm_mode_remove(connector, mode);
 340
 341         list_for_each_entry_safe(mode, t, &connector->modes, head)
 342                 drm_mode_remove(connector, mode);
 343
 344         ida_remove(&drm_connector_enum_list[connector->connector_type].ida,
 345                    connector->connector_type_id);
 346
 347         ida_remove(&dev->mode_config.connector_ida,
 348                    connector->index);
 349
 350         kfree(connector->display_info.bus_formats);
 351         drm_mode_object_unregister(dev, &connector->base);
 352         kfree(connector->name);
 353         connector->name = NULL;
 354         list_del(&connector->head);
 355         dev->mode_config.num_connector--;
 356
 357         WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
 358         if (connector->state && connector->funcs->atomic_destroy_state)
 359                 connector->funcs->atomic_destroy_state(connector,
 360                                                        connector->state);
 361
 362         memset(connector, 0, sizeof(*connector));
 363 }
 364 EXPORT_SYMBOL(drm_connector_cleanup);
 365
 366 /**
 367  * drm_connector_register - register a connector
 368  * @connector: the connector to register
 369  *
 370  * Register userspace interfaces for a connector
 371  *
 372  * Returns:
 373  * Zero on success, error code on failure.
 374  */
 375 int drm_connector_register(struct drm_connector *connector)
 376 {
 377         int ret;
 378
 379         if (connector->registered)
 380                 return 0;
 381
 382         ret = drm_sysfs_connector_add(connector);
 383         if (ret)
 384                 return ret;
 385
 386         ret = drm_debugfs_connector_add(connector);
 387         if (ret) {
 388                 goto err_sysfs;
 389         }
 390
 391         if (connector->funcs->late_register) {
 392                 ret = connector->funcs->late_register(connector);
 393                 if (ret)
 394                         goto err_debugfs;
 395         }
 396
 397         drm_mode_object_register(connector->dev, &connector->base);
 398
 399         connector->registered = true;
 400         return 0;
 401
 402 err_debugfs:
 403         drm_debugfs_connector_remove(connector);
 404 err_sysfs:
 405         drm_sysfs_connector_remove(connector);
 406         return ret;
 407 }
 408 EXPORT_SYMBOL(drm_connector_register);
 409
 410 /**
 411  * drm_connector_unregister - unregister a connector
 412  * @connector: the connector to unregister
 413  *
 414  * Unregister userspace interfaces for a connector
 415  */
 416 void drm_connector_unregister(struct drm_connector *connector)
 417 {
 418         if (!connector->registered)
 419                 return;
 420
 421         if (connector->funcs->early_unregister)
 422                 connector->funcs->early_unregister(connector);
 423
 424         drm_sysfs_connector_remove(connector);
 425         drm_debugfs_connector_remove(connector);
 426
 427         connector->registered = false;
 428 }
 429 EXPORT_SYMBOL(drm_connector_unregister);
 430
 431 void drm_connector_unregister_all(struct drm_device *dev)
 432 {
 433         struct drm_connector *connector;
 434
 435         /* FIXME: taking the mode config mutex ends up in a clash with sysfs */
 436         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
 437                 drm_connector_unregister(connector);
 438 }
 439
 440 int drm_connector_register_all(struct drm_device *dev)
 441 {
 442         struct drm_connector *connector;
 443         int ret;
 444
 445         /* FIXME: taking the mode config mutex ends up in a clash with
 446          * fbcon/backlight registration */
 447         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 448                 ret = drm_connector_register(connector);
 449                 if (ret)
 450                         goto err;
 451         }
 452
 453         return 0;
 454
 455 err:
 456         mutex_unlock(&dev->mode_config.mutex);
 457         drm_connector_unregister_all(dev);
 458         return ret;
 459 }
 460
 461 /**
 462  * drm_get_connector_status_name - return a string for connector status
 463  * @status: connector status to compute name of
 464  *
 465  * In contrast to the other drm_get_*_name functions this one here returns a
 466  * const pointer and hence is threadsafe.
 467  */
 468 const char *drm_get_connector_status_name(enum drm_connector_status status)
 469 {
 470         if (status == connector_status_connected)
 471                 return "connected";
 472         else if (status == connector_status_disconnected)
 473                 return "disconnected";
 474         else
 475                 return "unknown";
 476 }
 477 EXPORT_SYMBOL(drm_get_connector_status_name);
 478
 479 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
 480         { SubPixelUnknown, "Unknown" },
 481         { SubPixelHorizontalRGB, "Horizontal RGB" },
 482         { SubPixelHorizontalBGR, "Horizontal BGR" },
 483         { SubPixelVerticalRGB, "Vertical RGB" },
 484         { SubPixelVerticalBGR, "Vertical BGR" },
 485         { SubPixelNone, "None" },
 486 };
 487
 488 /**
 489  * drm_get_subpixel_order_name - return a string for a given subpixel enum
 490  * @order: enum of subpixel_order
 491  *
 492  * Note you could abuse this and return something out of bounds, but that
 493  * would be a caller error.  No unscrubbed user data should make it here.
 494  */
 495 const char *drm_get_subpixel_order_name(enum subpixel_order order)
 496 {
 497         return drm_subpixel_enum_list[order].name;
 498 }
 499 EXPORT_SYMBOL(drm_get_subpixel_order_name);
 500
 501 static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
 502         { DRM_MODE_DPMS_ON, "On" },
 503         { DRM_MODE_DPMS_STANDBY, "Standby" },
 504         { DRM_MODE_DPMS_SUSPEND, "Suspend" },
 505         { DRM_MODE_DPMS_OFF, "Off" }
 506 };
 507 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
 508
 509 /**
 510  * drm_display_info_set_bus_formats - set the supported bus formats
 511  * @info: display info to store bus formats in
 512  * @formats: array containing the supported bus formats
 513  * @num_formats: the number of entries in the fmts array
 514  *
 515  * Store the supported bus formats in display info structure.
 516  * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
 517  * a full list of available formats.
 518  */
 519 int drm_display_info_set_bus_formats(struct drm_display_info *info,
 520                                      const u32 *formats,
 521                                      unsigned int num_formats)
 522 {
 523         u32 *fmts = NULL;
 524
 525         if (!formats && num_formats)
 526                 return -EINVAL;
 527
 528         if (formats && num_formats) {
 529                 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
 530                                GFP_KERNEL);
 531                 if (!fmts)
 532                         return -ENOMEM;
 533         }
 534
 535         kfree(info->bus_formats);
 536         info->bus_formats = fmts;
 537         info->num_bus_formats = num_formats;
 538
 539         return 0;
 540 }
 541 EXPORT_SYMBOL(drm_display_info_set_bus_formats);
 542
 543 /* Optional connector properties. */
 544 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
 545         { DRM_MODE_SCALE_NONE, "None" },
 546         { DRM_MODE_SCALE_FULLSCREEN, "Full" },
 547         { DRM_MODE_SCALE_CENTER, "Center" },
 548         { DRM_MODE_SCALE_ASPECT, "Full aspect" },
 549 };
 550
 551 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
 552         { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
 553         { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
 554         { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
 555 };
 556
 557 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
 558         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
 559         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
 560         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
 561 };
 562 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
 563
 564 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
 565         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
 566         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
 567         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
 568 };
 569 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
 570                  drm_dvi_i_subconnector_enum_list)
 571
 572 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
 573         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
 574         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
 575         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
 576         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
 577         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
 578 };
 579 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
 580
 581 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
 582         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
 583         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
 584         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
 585         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
 586         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
 587 };
 588 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
 589                  drm_tv_subconnector_enum_list)
 590
 591 int drm_connector_create_standard_properties(struct drm_device *dev)
 592 {
 593         struct drm_property *prop;
 594
 595         prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
 596                                    DRM_MODE_PROP_IMMUTABLE,
 597                                    "EDID", 0);
 598         if (!prop)
 599                 return -ENOMEM;
 600         dev->mode_config.edid_property = prop;
 601
 602         prop = drm_property_create_enum(dev, 0,
 603                                    "DPMS", drm_dpms_enum_list,
 604                                    ARRAY_SIZE(drm_dpms_enum_list));
 605         if (!prop)
 606                 return -ENOMEM;
 607         dev->mode_config.dpms_property = prop;
 608
 609         prop = drm_property_create(dev,
 610                                    DRM_MODE_PROP_BLOB |
 611                                    DRM_MODE_PROP_IMMUTABLE,
 612                                    "PATH", 0);
 613         if (!prop)
 614                 return -ENOMEM;
 615         dev->mode_config.path_property = prop;
 616
 617         prop = drm_property_create(dev,
 618                                    DRM_MODE_PROP_BLOB |
 619                                    DRM_MODE_PROP_IMMUTABLE,
 620                                    "TILE", 0);
 621         if (!prop)
 622                 return -ENOMEM;
 623         dev->mode_config.tile_property = prop;
 624
 625         return 0;
 626 }
 627
 628 /**
 629  * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
 630  * @dev: DRM device
 631  *
 632  * Called by a driver the first time a DVI-I connector is made.
 633  */
 634 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
 635 {
 636         struct drm_property *dvi_i_selector;
 637         struct drm_property *dvi_i_subconnector;
 638
 639         if (dev->mode_config.dvi_i_select_subconnector_property)
 640                 return 0;
 641
 642         dvi_i_selector =
 643                 drm_property_create_enum(dev, 0,
 644                                     "select subconnector",
 645                                     drm_dvi_i_select_enum_list,
 646                                     ARRAY_SIZE(drm_dvi_i_select_enum_list));
 647         dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
 648
 649         dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
 650                                     "subconnector",
 651                                     drm_dvi_i_subconnector_enum_list,
 652                                     ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
 653         dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
 654
 655         return 0;
 656 }
 657 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
 658
 659 /**
 660  * drm_create_tv_properties - create TV specific connector properties
 661  * @dev: DRM device
 662  * @num_modes: number of different TV formats (modes) supported
 663  * @modes: array of pointers to strings containing name of each format
 664  *
 665  * Called by a driver's TV initialization routine, this function creates
 666  * the TV specific connector properties for a given device.  Caller is
 667  * responsible for allocating a list of format names and passing them to
 668  * this routine.
 669  */
 670 int drm_mode_create_tv_properties(struct drm_device *dev,
 671                                   unsigned int num_modes,
 672                                   const char * const modes[])
 673 {
 674         struct drm_property *tv_selector;
 675         struct drm_property *tv_subconnector;
 676         unsigned int i;
 677
 678         if (dev->mode_config.tv_select_subconnector_property)
 679                 return 0;
 680
 681         /*
 682          * Basic connector properties
 683          */
 684         tv_selector = drm_property_create_enum(dev, 0,
 685                                           "select subconnector",
 686                                           drm_tv_select_enum_list,
 687                                           ARRAY_SIZE(drm_tv_select_enum_list));
 688         if (!tv_selector)
 689                 goto nomem;
 690
 691         dev->mode_config.tv_select_subconnector_property = tv_selector;
 692
 693         tv_subconnector =
 694                 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
 695                                     "subconnector",
 696                                     drm_tv_subconnector_enum_list,
 697                                     ARRAY_SIZE(drm_tv_subconnector_enum_list));
 698         if (!tv_subconnector)
 699                 goto nomem;
 700         dev->mode_config.tv_subconnector_property = tv_subconnector;
 701
 702         /*
 703          * Other, TV specific properties: margins & TV modes.
 704          */
 705         dev->mode_config.tv_left_margin_property =
 706                 drm_property_create_range(dev, 0, "left margin", 0, 100);
 707         if (!dev->mode_config.tv_left_margin_property)
 708                 goto nomem;
 709
 710         dev->mode_config.tv_right_margin_property =
 711                 drm_property_create_range(dev, 0, "right margin", 0, 100);
 712         if (!dev->mode_config.tv_right_margin_property)
 713                 goto nomem;
 714
 715         dev->mode_config.tv_top_margin_property =
 716                 drm_property_create_range(dev, 0, "top margin", 0, 100);
 717         if (!dev->mode_config.tv_top_margin_property)
 718                 goto nomem;
 719
 720         dev->mode_config.tv_bottom_margin_property =
 721                 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
 722         if (!dev->mode_config.tv_bottom_margin_property)
 723                 goto nomem;
 724
 725         dev->mode_config.tv_mode_property =
 726                 drm_property_create(dev, DRM_MODE_PROP_ENUM,
 727                                     "mode", num_modes);
 728         if (!dev->mode_config.tv_mode_property)
 729                 goto nomem;
 730
 731         for (i = 0; i < num_modes; i++)
 732                 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
 733                                       i, modes[i]);
 734
 735         dev->mode_config.tv_brightness_property =
 736                 drm_property_create_range(dev, 0, "brightness", 0, 100);
 737         if (!dev->mode_config.tv_brightness_property)
 738                 goto nomem;
 739
 740         dev->mode_config.tv_contrast_property =
 741                 drm_property_create_range(dev, 0, "contrast", 0, 100);
 742         if (!dev->mode_config.tv_contrast_property)
 743                 goto nomem;
 744
 745         dev->mode_config.tv_flicker_reduction_property =
 746                 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
 747         if (!dev->mode_config.tv_flicker_reduction_property)
 748                 goto nomem;
 749
 750         dev->mode_config.tv_overscan_property =
 751                 drm_property_create_range(dev, 0, "overscan", 0, 100);
 752         if (!dev->mode_config.tv_overscan_property)
 753                 goto nomem;
 754
 755         dev->mode_config.tv_saturation_property =
 756                 drm_property_create_range(dev, 0, "saturation", 0, 100);
 757         if (!dev->mode_config.tv_saturation_property)
 758                 goto nomem;
 759
 760         dev->mode_config.tv_hue_property =
 761                 drm_property_create_range(dev, 0, "hue", 0, 100);
 762         if (!dev->mode_config.tv_hue_property)
 763                 goto nomem;
 764
 765         return 0;
 766 nomem:
 767         return -ENOMEM;
 768 }
 769 EXPORT_SYMBOL(drm_mode_create_tv_properties);
 770
 771 /**
 772  * drm_mode_create_scaling_mode_property - create scaling mode property
 773  * @dev: DRM device
 774  *
 775  * Called by a driver the first time it's needed, must be attached to desired
 776  * connectors.
 777  */
 778 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
 779 {
 780         struct drm_property *scaling_mode;
 781
 782         if (dev->mode_config.scaling_mode_property)
 783                 return 0;
 784
 785         scaling_mode =
 786                 drm_property_create_enum(dev, 0, "scaling mode",
 787                                 drm_scaling_mode_enum_list,
 788                                     ARRAY_SIZE(drm_scaling_mode_enum_list));
 789
 790         dev->mode_config.scaling_mode_property = scaling_mode;
 791
 792         return 0;
 793 }
 794 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
 795
 796 /**
 797  * drm_mode_create_aspect_ratio_property - create aspect ratio property
 798  * @dev: DRM device
 799  *
 800  * Called by a driver the first time it's needed, must be attached to desired
 801  * connectors.
 802  *
 803  * Returns:
 804  * Zero on success, negative errno on failure.
 805  */
 806 int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
 807 {
 808         if (dev->mode_config.aspect_ratio_property)
 809                 return 0;
 810
 811         dev->mode_config.aspect_ratio_property =
 812                 drm_property_create_enum(dev, 0, "aspect ratio",
 813                                 drm_aspect_ratio_enum_list,
 814                                 ARRAY_SIZE(drm_aspect_ratio_enum_list));
 815
 816         if (dev->mode_config.aspect_ratio_property == NULL)
 817                 return -ENOMEM;
 818
 819         return 0;
 820 }
 821 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
 822
 823 /**
 824  * drm_mode_create_suggested_offset_properties - create suggests offset properties
 825  * @dev: DRM device
 826  *
 827  * Create the the suggested x/y offset property for connectors.
 828  */
 829 int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
 830 {
 831         if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
 832                 return 0;
 833
 834         dev->mode_config.suggested_x_property =
 835                 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
 836
 837         dev->mode_config.suggested_y_property =
 838                 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
 839
 840         if (dev->mode_config.suggested_x_property == NULL ||
 841             dev->mode_config.suggested_y_property == NULL)
 842                 return -ENOMEM;
 843         return 0;
 844 }
 845 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
 846
 847 /**
 848  * drm_mode_connector_set_path_property - set tile property on connector
 849  * @connector: connector to set property on.
 850  * @path: path to use for property; must not be NULL.
 851  *
 852  * This creates a property to expose to userspace to specify a
 853  * connector path. This is mainly used for DisplayPort MST where
 854  * connectors have a topology and we want to allow userspace to give
 855  * them more meaningful names.
 856  *
 857  * Returns:
 858  * Zero on success, negative errno on failure.
 859  */
 860 int drm_mode_connector_set_path_property(struct drm_connector *connector,
 861                                          const char *path)
 862 {
 863         struct drm_device *dev = connector->dev;
 864         int ret;
 865
 866         ret = drm_property_replace_global_blob(dev,
 867                                                &connector->path_blob_ptr,
 868                                                strlen(path) + 1,
 869                                                path,
 870                                                &connector->base,
 871                                                dev->mode_config.path_property);
 872         return ret;
 873 }
 874 EXPORT_SYMBOL(drm_mode_connector_set_path_property);
 875
 876 /**
 877  * drm_mode_connector_set_tile_property - set tile property on connector
 878  * @connector: connector to set property on.
 879  *
 880  * This looks up the tile information for a connector, and creates a
 881  * property for userspace to parse if it exists. The property is of
 882  * the form of 8 integers using ':' as a separator.
 883  *
 884  * Returns:
 885  * Zero on success, errno on failure.
 886  */
 887 int drm_mode_connector_set_tile_property(struct drm_connector *connector)
 888 {
 889         struct drm_device *dev = connector->dev;
 890         char tile[256];
 891         int ret;
 892
 893         if (!connector->has_tile) {
 894                 ret  = drm_property_replace_global_blob(dev,
 895                                                         &connector->tile_blob_ptr,
 896                                                         0,
 897                                                         NULL,
 898                                                         &connector->base,
 899                                                         dev->mode_config.tile_property);
 900                 return ret;
 901         }
 902
 903         snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
 904                  connector->tile_group->id, connector->tile_is_single_monitor,
 905                  connector->num_h_tile, connector->num_v_tile,
 906                  connector->tile_h_loc, connector->tile_v_loc,
 907                  connector->tile_h_size, connector->tile_v_size);
 908
 909         ret = drm_property_replace_global_blob(dev,
 910                                                &connector->tile_blob_ptr,
 911                                                strlen(tile) + 1,
 912                                                tile,
 913                                                &connector->base,
 914                                                dev->mode_config.tile_property);
 915         return ret;
 916 }
 917 EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
 918
 919 /**
 920  * drm_mode_connector_update_edid_property - update the edid property of a connector
 921  * @connector: drm connector
 922  * @edid: new value of the edid property
 923  *
 924  * This function creates a new blob modeset object and assigns its id to the
 925  * connector's edid property.
 926  *
 927  * Returns:
 928  * Zero on success, negative errno on failure.
 929  */
 930 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
 931                                             const struct edid *edid)
 932 {
 933         struct drm_device *dev = connector->dev;
 934         size_t size = 0;
 935         int ret;
 936
 937         /* ignore requests to set edid when overridden */
 938         if (connector->override_edid)
 939                 return 0;
 940
 941         if (edid)
 942                 size = EDID_LENGTH * (1 + edid->extensions);
 943
 944         ret = drm_property_replace_global_blob(dev,
 945                                                &connector->edid_blob_ptr,
 946                                                size,
 947                                                edid,
 948                                                &connector->base,
 949                                                dev->mode_config.edid_property);
 950         return ret;
 951 }
 952 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
 953
 954 int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
 955                                     struct drm_property *property,
 956                                     uint64_t value)
 957 {
 958         int ret = -EINVAL;
 959         struct drm_connector *connector = obj_to_connector(obj);
 960
 961         /* Do DPMS ourselves */
 962         if (property == connector->dev->mode_config.dpms_property) {
 963                 ret = (*connector->funcs->dpms)(connector, (int)value);
 964         } else if (connector->funcs->set_property)
 965                 ret = connector->funcs->set_property(connector, property, value);
 966
 967         /* store the property value if successful */
 968         if (!ret)
 969                 drm_object_property_set_value(&connector->base, property, value);
 970         return ret;
 971 }
 972
 973 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
 974                                        void *data, struct drm_file *file_priv)
 975 {
 976         struct drm_mode_connector_set_property *conn_set_prop = data;
 977         struct drm_mode_obj_set_property obj_set_prop = {
 978                 .value = conn_set_prop->value,
 979                 .prop_id = conn_set_prop->prop_id,
 980                 .obj_id = conn_set_prop->connector_id,
 981                 .obj_type = DRM_MODE_OBJECT_CONNECTOR
 982         };
 983
 984         /* It does all the locking and checking we need */
 985         return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
 986 }
 987
 988 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
 989 {
 990         /* For atomic drivers only state objects are synchronously updated and
 991          * protected by modeset locks, so check those first. */
 992         if (connector->state)
 993                 return connector->state->best_encoder;
 994         return connector->encoder;
 995 }
 996
 997 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
 998                                          const struct drm_file *file_priv)
 999 {
1000         /*
1001          * If user-space hasn't configured the driver to expose the stereo 3D
1002          * modes, don't expose them.
1003          */
1004         if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1005                 return false;
1006
1007         return true;
1008 }
1009
1010 int drm_mode_getconnector(struct drm_device *dev, void *data,
1011                           struct drm_file *file_priv)
1012 {
1013         struct drm_mode_get_connector *out_resp = data;
1014         struct drm_connector *connector;
1015         struct drm_encoder *encoder;
1016         struct drm_display_mode *mode;
1017         int mode_count = 0;
1018         int encoders_count = 0;
1019         int ret = 0;
1020         int copied = 0;
1021         int i;
1022         struct drm_mode_modeinfo u_mode;
1023         struct drm_mode_modeinfo __user *mode_ptr;
1024         uint32_t __user *encoder_ptr;
1025
1026         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1027                 return -EINVAL;
1028
1029         memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1030
1031         mutex_lock(&dev->mode_config.mutex);
1032
1033         connector = drm_connector_lookup(dev, out_resp->connector_id);
1034         if (!connector) {
1035                 ret = -ENOENT;
1036                 goto out_unlock;
1037         }
1038
1039         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
1040                 if (connector->encoder_ids[i] != 0)
1041                         encoders_count++;
1042
1043         if (out_resp->count_modes == 0) {
1044                 connector->funcs->fill_modes(connector,
1045                                              dev->mode_config.max_width,
1046                                              dev->mode_config.max_height);
1047         }
1048
1049         /* delayed so we get modes regardless of pre-fill_modes state */
1050         list_for_each_entry(mode, &connector->modes, head)
1051                 if (drm_mode_expose_to_userspace(mode, file_priv))
1052                         mode_count++;
1053
1054         out_resp->connector_id = connector->base.id;
1055         out_resp->connector_type = connector->connector_type;
1056         out_resp->connector_type_id = connector->connector_type_id;
1057         out_resp->mm_width = connector->display_info.width_mm;
1058         out_resp->mm_height = connector->display_info.height_mm;
1059         out_resp->subpixel = connector->display_info.subpixel_order;
1060         out_resp->connection = connector->status;
1061
1062         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1063         encoder = drm_connector_get_encoder(connector);
1064         if (encoder)
1065                 out_resp->encoder_id = encoder->base.id;
1066         else
1067                 out_resp->encoder_id = 0;
1068
1069         /*
1070          * This ioctl is called twice, once to determine how much space is
1071          * needed, and the 2nd time to fill it.
1072          */
1073         if ((out_resp->count_modes >= mode_count) && mode_count) {
1074                 copied = 0;
1075                 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1076                 list_for_each_entry(mode, &connector->modes, head) {
1077                         if (!drm_mode_expose_to_userspace(mode, file_priv))
1078                                 continue;
1079
1080                         drm_mode_convert_to_umode(&u_mode, mode);
1081                         if (copy_to_user(mode_ptr + copied,
1082                                          &u_mode, sizeof(u_mode))) {
1083                                 ret = -EFAULT;
1084                                 goto out;
1085                         }
1086                         copied++;
1087                 }
1088         }
1089         out_resp->count_modes = mode_count;
1090
1091         ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
1092                         (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
1093                         (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
1094                         &out_resp->count_props);
1095         if (ret)
1096                 goto out;
1097
1098         if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1099                 copied = 0;
1100                 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1101                 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1102                         if (connector->encoder_ids[i] != 0) {
1103                                 if (put_user(connector->encoder_ids[i],
1104                                              encoder_ptr + copied)) {
1105                                         ret = -EFAULT;
1106                                         goto out;
1107                                 }
1108                                 copied++;
1109                         }
1110                 }
1111         }
1112         out_resp->count_encoders = encoders_count;
1113
1114 out:
1115         drm_modeset_unlock(&dev->mode_config.connection_mutex);
1116
1117         drm_connector_unreference(connector);
1118 out_unlock:
1119         mutex_unlock(&dev->mode_config.mutex);
1120
1121         return ret;
1122 }
1123