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 /* Optional connector properties. */
 510 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
 511         { DRM_MODE_SCALE_NONE, "None" },
 512         { DRM_MODE_SCALE_FULLSCREEN, "Full" },
 513         { DRM_MODE_SCALE_CENTER, "Center" },
 514         { DRM_MODE_SCALE_ASPECT, "Full aspect" },
 515 };
 516
 517 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
 518         { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
 519         { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
 520         { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
 521 };
 522
 523 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
 524         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
 525         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
 526         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
 527 };
 528 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
 529
 530 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
 531         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
 532         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
 533         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
 534 };
 535 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
 536                  drm_dvi_i_subconnector_enum_list)
 537
 538 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
 539         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
 540         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
 541         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
 542         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
 543         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
 544 };
 545 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
 546
 547 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
 548         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
 549         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
 550         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
 551         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
 552         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
 553 };
 554 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
 555                  drm_tv_subconnector_enum_list)
 556
 557 int drm_connector_create_standard_properties(struct drm_device *dev)
 558 {
 559         struct drm_property *prop;
 560
 561         prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
 562                                    DRM_MODE_PROP_IMMUTABLE,
 563                                    "EDID", 0);
 564         if (!prop)
 565                 return -ENOMEM;
 566         dev->mode_config.edid_property = prop;
 567
 568         prop = drm_property_create_enum(dev, 0,
 569                                    "DPMS", drm_dpms_enum_list,
 570                                    ARRAY_SIZE(drm_dpms_enum_list));
 571         if (!prop)
 572                 return -ENOMEM;
 573         dev->mode_config.dpms_property = prop;
 574
 575         prop = drm_property_create(dev,
 576                                    DRM_MODE_PROP_BLOB |
 577                                    DRM_MODE_PROP_IMMUTABLE,
 578                                    "PATH", 0);
 579         if (!prop)
 580                 return -ENOMEM;
 581         dev->mode_config.path_property = prop;
 582
 583         prop = drm_property_create(dev,
 584                                    DRM_MODE_PROP_BLOB |
 585                                    DRM_MODE_PROP_IMMUTABLE,
 586                                    "TILE", 0);
 587         if (!prop)
 588                 return -ENOMEM;
 589         dev->mode_config.tile_property = prop;
 590
 591         return 0;
 592 }
 593
 594 /**
 595  * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
 596  * @dev: DRM device
 597  *
 598  * Called by a driver the first time a DVI-I connector is made.
 599  */
 600 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
 601 {
 602         struct drm_property *dvi_i_selector;
 603         struct drm_property *dvi_i_subconnector;
 604
 605         if (dev->mode_config.dvi_i_select_subconnector_property)
 606                 return 0;
 607
 608         dvi_i_selector =
 609                 drm_property_create_enum(dev, 0,
 610                                     "select subconnector",
 611                                     drm_dvi_i_select_enum_list,
 612                                     ARRAY_SIZE(drm_dvi_i_select_enum_list));
 613         dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
 614
 615         dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
 616                                     "subconnector",
 617                                     drm_dvi_i_subconnector_enum_list,
 618                                     ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
 619         dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
 620
 621         return 0;
 622 }
 623 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
 624
 625 /**
 626  * drm_create_tv_properties - create TV specific connector properties
 627  * @dev: DRM device
 628  * @num_modes: number of different TV formats (modes) supported
 629  * @modes: array of pointers to strings containing name of each format
 630  *
 631  * Called by a driver's TV initialization routine, this function creates
 632  * the TV specific connector properties for a given device.  Caller is
 633  * responsible for allocating a list of format names and passing them to
 634  * this routine.
 635  */
 636 int drm_mode_create_tv_properties(struct drm_device *dev,
 637                                   unsigned int num_modes,
 638                                   const char * const modes[])
 639 {
 640         struct drm_property *tv_selector;
 641         struct drm_property *tv_subconnector;
 642         unsigned int i;
 643
 644         if (dev->mode_config.tv_select_subconnector_property)
 645                 return 0;
 646
 647         /*
 648          * Basic connector properties
 649          */
 650         tv_selector = drm_property_create_enum(dev, 0,
 651                                           "select subconnector",
 652                                           drm_tv_select_enum_list,
 653                                           ARRAY_SIZE(drm_tv_select_enum_list));
 654         if (!tv_selector)
 655                 goto nomem;
 656
 657         dev->mode_config.tv_select_subconnector_property = tv_selector;
 658
 659         tv_subconnector =
 660                 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
 661                                     "subconnector",
 662                                     drm_tv_subconnector_enum_list,
 663                                     ARRAY_SIZE(drm_tv_subconnector_enum_list));
 664         if (!tv_subconnector)
 665                 goto nomem;
 666         dev->mode_config.tv_subconnector_property = tv_subconnector;
 667
 668         /*
 669          * Other, TV specific properties: margins & TV modes.
 670          */
 671         dev->mode_config.tv_left_margin_property =
 672                 drm_property_create_range(dev, 0, "left margin", 0, 100);
 673         if (!dev->mode_config.tv_left_margin_property)
 674                 goto nomem;
 675
 676         dev->mode_config.tv_right_margin_property =
 677                 drm_property_create_range(dev, 0, "right margin", 0, 100);
 678         if (!dev->mode_config.tv_right_margin_property)
 679                 goto nomem;
 680
 681         dev->mode_config.tv_top_margin_property =
 682                 drm_property_create_range(dev, 0, "top margin", 0, 100);
 683         if (!dev->mode_config.tv_top_margin_property)
 684                 goto nomem;
 685
 686         dev->mode_config.tv_bottom_margin_property =
 687                 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
 688         if (!dev->mode_config.tv_bottom_margin_property)
 689                 goto nomem;
 690
 691         dev->mode_config.tv_mode_property =
 692                 drm_property_create(dev, DRM_MODE_PROP_ENUM,
 693                                     "mode", num_modes);
 694         if (!dev->mode_config.tv_mode_property)
 695                 goto nomem;
 696
 697         for (i = 0; i < num_modes; i++)
 698                 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
 699                                       i, modes[i]);
 700
 701         dev->mode_config.tv_brightness_property =
 702                 drm_property_create_range(dev, 0, "brightness", 0, 100);
 703         if (!dev->mode_config.tv_brightness_property)
 704                 goto nomem;
 705
 706         dev->mode_config.tv_contrast_property =
 707                 drm_property_create_range(dev, 0, "contrast", 0, 100);
 708         if (!dev->mode_config.tv_contrast_property)
 709                 goto nomem;
 710
 711         dev->mode_config.tv_flicker_reduction_property =
 712                 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
 713         if (!dev->mode_config.tv_flicker_reduction_property)
 714                 goto nomem;
 715
 716         dev->mode_config.tv_overscan_property =
 717                 drm_property_create_range(dev, 0, "overscan", 0, 100);
 718         if (!dev->mode_config.tv_overscan_property)
 719                 goto nomem;
 720
 721         dev->mode_config.tv_saturation_property =
 722                 drm_property_create_range(dev, 0, "saturation", 0, 100);
 723         if (!dev->mode_config.tv_saturation_property)
 724                 goto nomem;
 725
 726         dev->mode_config.tv_hue_property =
 727                 drm_property_create_range(dev, 0, "hue", 0, 100);
 728         if (!dev->mode_config.tv_hue_property)
 729                 goto nomem;
 730
 731         return 0;
 732 nomem:
 733         return -ENOMEM;
 734 }
 735 EXPORT_SYMBOL(drm_mode_create_tv_properties);
 736
 737 /**
 738  * drm_mode_create_scaling_mode_property - create scaling mode property
 739  * @dev: DRM device
 740  *
 741  * Called by a driver the first time it's needed, must be attached to desired
 742  * connectors.
 743  */
 744 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
 745 {
 746         struct drm_property *scaling_mode;
 747
 748         if (dev->mode_config.scaling_mode_property)
 749                 return 0;
 750
 751         scaling_mode =
 752                 drm_property_create_enum(dev, 0, "scaling mode",
 753                                 drm_scaling_mode_enum_list,
 754                                     ARRAY_SIZE(drm_scaling_mode_enum_list));
 755
 756         dev->mode_config.scaling_mode_property = scaling_mode;
 757
 758         return 0;
 759 }
 760 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
 761
 762 /**
 763  * drm_mode_create_aspect_ratio_property - create aspect ratio property
 764  * @dev: DRM device
 765  *
 766  * Called by a driver the first time it's needed, must be attached to desired
 767  * connectors.
 768  *
 769  * Returns:
 770  * Zero on success, negative errno on failure.
 771  */
 772 int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
 773 {
 774         if (dev->mode_config.aspect_ratio_property)
 775                 return 0;
 776
 777         dev->mode_config.aspect_ratio_property =
 778                 drm_property_create_enum(dev, 0, "aspect ratio",
 779                                 drm_aspect_ratio_enum_list,
 780                                 ARRAY_SIZE(drm_aspect_ratio_enum_list));
 781
 782         if (dev->mode_config.aspect_ratio_property == NULL)
 783                 return -ENOMEM;
 784
 785         return 0;
 786 }
 787 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
 788
 789 /**
 790  * drm_mode_create_suggested_offset_properties - create suggests offset properties
 791  * @dev: DRM device
 792  *
 793  * Create the the suggested x/y offset property for connectors.
 794  */
 795 int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
 796 {
 797         if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
 798                 return 0;
 799
 800         dev->mode_config.suggested_x_property =
 801                 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
 802
 803         dev->mode_config.suggested_y_property =
 804                 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
 805
 806         if (dev->mode_config.suggested_x_property == NULL ||
 807             dev->mode_config.suggested_y_property == NULL)
 808                 return -ENOMEM;
 809         return 0;
 810 }
 811 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
 812
 813 /**
 814  * drm_mode_connector_set_path_property - set tile property on connector
 815  * @connector: connector to set property on.
 816  * @path: path to use for property; must not be NULL.
 817  *
 818  * This creates a property to expose to userspace to specify a
 819  * connector path. This is mainly used for DisplayPort MST where
 820  * connectors have a topology and we want to allow userspace to give
 821  * them more meaningful names.
 822  *
 823  * Returns:
 824  * Zero on success, negative errno on failure.
 825  */
 826 int drm_mode_connector_set_path_property(struct drm_connector *connector,
 827                                          const char *path)
 828 {
 829         struct drm_device *dev = connector->dev;
 830         int ret;
 831
 832         ret = drm_property_replace_global_blob(dev,
 833                                                &connector->path_blob_ptr,
 834                                                strlen(path) + 1,
 835                                                path,
 836                                                &connector->base,
 837                                                dev->mode_config.path_property);
 838         return ret;
 839 }
 840 EXPORT_SYMBOL(drm_mode_connector_set_path_property);
 841
 842 /**
 843  * drm_mode_connector_set_tile_property - set tile property on connector
 844  * @connector: connector to set property on.
 845  *
 846  * This looks up the tile information for a connector, and creates a
 847  * property for userspace to parse if it exists. The property is of
 848  * the form of 8 integers using ':' as a separator.
 849  *
 850  * Returns:
 851  * Zero on success, errno on failure.
 852  */
 853 int drm_mode_connector_set_tile_property(struct drm_connector *connector)
 854 {
 855         struct drm_device *dev = connector->dev;
 856         char tile[256];
 857         int ret;
 858
 859         if (!connector->has_tile) {
 860                 ret  = drm_property_replace_global_blob(dev,
 861                                                         &connector->tile_blob_ptr,
 862                                                         0,
 863                                                         NULL,
 864                                                         &connector->base,
 865                                                         dev->mode_config.tile_property);
 866                 return ret;
 867         }
 868
 869         snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
 870                  connector->tile_group->id, connector->tile_is_single_monitor,
 871                  connector->num_h_tile, connector->num_v_tile,
 872                  connector->tile_h_loc, connector->tile_v_loc,
 873                  connector->tile_h_size, connector->tile_v_size);
 874
 875         ret = drm_property_replace_global_blob(dev,
 876                                                &connector->tile_blob_ptr,
 877                                                strlen(tile) + 1,
 878                                                tile,
 879                                                &connector->base,
 880                                                dev->mode_config.tile_property);
 881         return ret;
 882 }
 883 EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
 884
 885 /**
 886  * drm_mode_connector_update_edid_property - update the edid property of a connector
 887  * @connector: drm connector
 888  * @edid: new value of the edid property
 889  *
 890  * This function creates a new blob modeset object and assigns its id to the
 891  * connector's edid property.
 892  *
 893  * Returns:
 894  * Zero on success, negative errno on failure.
 895  */
 896 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
 897                                             const struct edid *edid)
 898 {
 899         struct drm_device *dev = connector->dev;
 900         size_t size = 0;
 901         int ret;
 902
 903         /* ignore requests to set edid when overridden */
 904         if (connector->override_edid)
 905                 return 0;
 906
 907         if (edid)
 908                 size = EDID_LENGTH * (1 + edid->extensions);
 909
 910         ret = drm_property_replace_global_blob(dev,
 911                                                &connector->edid_blob_ptr,
 912                                                size,
 913                                                edid,
 914                                                &connector->base,
 915                                                dev->mode_config.edid_property);
 916         return ret;
 917 }
 918 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
 919
 920 int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
 921                                     struct drm_property *property,
 922                                     uint64_t value)
 923 {
 924         int ret = -EINVAL;
 925         struct drm_connector *connector = obj_to_connector(obj);
 926
 927         /* Do DPMS ourselves */
 928         if (property == connector->dev->mode_config.dpms_property) {
 929                 ret = (*connector->funcs->dpms)(connector, (int)value);
 930         } else if (connector->funcs->set_property)
 931                 ret = connector->funcs->set_property(connector, property, value);
 932
 933         /* store the property value if successful */
 934         if (!ret)
 935                 drm_object_property_set_value(&connector->base, property, value);
 936         return ret;
 937 }
 938
 939 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
 940                                        void *data, struct drm_file *file_priv)
 941 {
 942         struct drm_mode_connector_set_property *conn_set_prop = data;
 943         struct drm_mode_obj_set_property obj_set_prop = {
 944                 .value = conn_set_prop->value,
 945                 .prop_id = conn_set_prop->prop_id,
 946                 .obj_id = conn_set_prop->connector_id,
 947                 .obj_type = DRM_MODE_OBJECT_CONNECTOR
 948         };
 949
 950         /* It does all the locking and checking we need */
 951         return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
 952 }
 953
 954 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
 955 {
 956         /* For atomic drivers only state objects are synchronously updated and
 957          * protected by modeset locks, so check those first. */
 958         if (connector->state)
 959                 return connector->state->best_encoder;
 960         return connector->encoder;
 961 }
 962
 963 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
 964                                          const struct drm_file *file_priv)
 965 {
 966         /*
 967          * If user-space hasn't configured the driver to expose the stereo 3D
 968          * modes, don't expose them.
 969          */
 970         if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
 971                 return false;
 972
 973         return true;
 974 }
 975
 976 int drm_mode_getconnector(struct drm_device *dev, void *data,
 977                           struct drm_file *file_priv)
 978 {
 979         struct drm_mode_get_connector *out_resp = data;
 980         struct drm_connector *connector;
 981         struct drm_encoder *encoder;
 982         struct drm_display_mode *mode;
 983         int mode_count = 0;
 984         int encoders_count = 0;
 985         int ret = 0;
 986         int copied = 0;
 987         int i;
 988         struct drm_mode_modeinfo u_mode;
 989         struct drm_mode_modeinfo __user *mode_ptr;
 990         uint32_t __user *encoder_ptr;
 991
 992         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 993                 return -EINVAL;
 994
 995         memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
 996
 997         mutex_lock(&dev->mode_config.mutex);
 998
 999         connector = drm_connector_lookup(dev, out_resp->connector_id);
1000         if (!connector) {
1001                 ret = -ENOENT;
1002                 goto out_unlock;
1003         }
1004
1005         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
1006                 if (connector->encoder_ids[i] != 0)
1007                         encoders_count++;
1008
1009         if (out_resp->count_modes == 0) {
1010                 connector->funcs->fill_modes(connector,
1011                                              dev->mode_config.max_width,
1012                                              dev->mode_config.max_height);
1013         }
1014
1015         /* delayed so we get modes regardless of pre-fill_modes state */
1016         list_for_each_entry(mode, &connector->modes, head)
1017                 if (drm_mode_expose_to_userspace(mode, file_priv))
1018                         mode_count++;
1019
1020         out_resp->connector_id = connector->base.id;
1021         out_resp->connector_type = connector->connector_type;
1022         out_resp->connector_type_id = connector->connector_type_id;
1023         out_resp->mm_width = connector->display_info.width_mm;
1024         out_resp->mm_height = connector->display_info.height_mm;
1025         out_resp->subpixel = connector->display_info.subpixel_order;
1026         out_resp->connection = connector->status;
1027
1028         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1029         encoder = drm_connector_get_encoder(connector);
1030         if (encoder)
1031                 out_resp->encoder_id = encoder->base.id;
1032         else
1033                 out_resp->encoder_id = 0;
1034
1035         /*
1036          * This ioctl is called twice, once to determine how much space is
1037          * needed, and the 2nd time to fill it.
1038          */
1039         if ((out_resp->count_modes >= mode_count) && mode_count) {
1040                 copied = 0;
1041                 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1042                 list_for_each_entry(mode, &connector->modes, head) {
1043                         if (!drm_mode_expose_to_userspace(mode, file_priv))
1044                                 continue;
1045
1046                         drm_mode_convert_to_umode(&u_mode, mode);
1047                         if (copy_to_user(mode_ptr + copied,
1048                                          &u_mode, sizeof(u_mode))) {
1049                                 ret = -EFAULT;
1050                                 goto out;
1051                         }
1052                         copied++;
1053                 }
1054         }
1055         out_resp->count_modes = mode_count;
1056
1057         ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
1058                         (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
1059                         (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
1060                         &out_resp->count_props);
1061         if (ret)
1062                 goto out;
1063
1064         if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1065                 copied = 0;
1066                 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1067                 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1068                         if (connector->encoder_ids[i] != 0) {
1069                                 if (put_user(connector->encoder_ids[i],
1070                                              encoder_ptr + copied)) {
1071                                         ret = -EFAULT;
1072                                         goto out;
1073                                 }
1074                                 copied++;
1075                         }
1076                 }
1077         }
1078         out_resp->count_encoders = encoders_count;
1079
1080 out:
1081         drm_modeset_unlock(&dev->mode_config.connection_mutex);
1082
1083         drm_connector_unreference(connector);
1084 out_unlock:
1085         mutex_unlock(&dev->mode_config.mutex);
1086
1087         return ret;
1088 }
1089