include/drm/drm_connector.h

   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 #ifndef __DRM_CONNECTOR_H__
  24 #define __DRM_CONNECTOR_H__
  25
  26 #include <linux/list.h>
  27 #include <linux/ctype.h>
  28 #include <drm/drm_mode_object.h>
  29
  30 struct drm_connector_helper_funcs;
  31 struct drm_device;
  32 struct drm_crtc;
  33 struct drm_encoder;
  34 struct drm_property;
  35 struct drm_property_blob;
  36 struct edid;
  37
  38 enum drm_connector_force {
  39         DRM_FORCE_UNSPECIFIED,
  40         DRM_FORCE_OFF,
  41         DRM_FORCE_ON,         /* force on analog part normally */
  42         DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
  43 };
  44
  45 /**
  46  * enum drm_connector_status - status for a &drm_connector
  47  *
  48  * This enum is used to track the connector status. There are no separate
  49  * #defines for the uapi!
  50  */
  51 enum drm_connector_status {
  52         /**
  53          * @connector_status_connected: The connector is definitely connected to
  54          * a sink device, and can be enabled.
  55          */
  56         connector_status_connected = 1,
  57         /**
  58          * @connector_status_disconnected: The connector isn't connected to a
  59          * sink device which can be autodetect. For digital outputs like DP or
  60          * HDMI (which can be realiable probed) this means there's really
  61          * nothing there. It is driver-dependent whether a connector with this
  62          * status can be lit up or not.
  63          */
  64         connector_status_disconnected = 2,
  65         /**
  66          * @connector_status_unknown: The connector's status could not be
  67          * reliably detected. This happens when probing would either cause
  68          * flicker (like load-detection when the connector is in use), or when a
  69          * hardware resource isn't available (like when load-detection needs a
  70          * free CRTC). It should be possible to light up the connector with one
  71          * of the listed fallback modes. For default configuration userspace
  72          * should only try to light up connectors with unknown status when
  73          * there's not connector with @connector_status_connected.
  74          */
  75         connector_status_unknown = 3,
  76 };
  77
  78 enum subpixel_order {
  79         SubPixelUnknown = 0,
  80         SubPixelHorizontalRGB,
  81         SubPixelHorizontalBGR,
  82         SubPixelVerticalRGB,
  83         SubPixelVerticalBGR,
  84         SubPixelNone,
  85 };
  86
  87 /**
  88  * struct drm_display_info - runtime data about the connected sink
  89  *
  90  * Describes a given display (e.g. CRT or flat panel) and its limitations. For
  91  * fixed display sinks like built-in panels there's not much difference between
  92  * this and struct &drm_connector. But for sinks with a real cable this
  93  * structure is meant to describe all the things at the other end of the cable.
  94  *
  95  * For sinks which provide an EDID this can be filled out by calling
  96  * drm_add_edid_modes().
  97  */
  98 struct drm_display_info {
  99         /**
 100          * @name: Name of the display.
 101          */
 102         char name[DRM_DISPLAY_INFO_LEN];
 103
 104         /**
 105          * @width_mm: Physical width in mm.
 106          */
 107         unsigned int width_mm;
 108         /**
 109          * @height_mm: Physical height in mm.
 110          */
 111         unsigned int height_mm;
 112
 113         /**
 114          * @pixel_clock: Maximum pixel clock supported by the sink, in units of
 115          * 100Hz. This mismatches the clok in &drm_display_mode (which is in
 116          * kHZ), because that's what the EDID uses as base unit.
 117          */
 118         unsigned int pixel_clock;
 119         /**
 120          * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs.
 121          */
 122         unsigned int bpc;
 123
 124         /**
 125          * @subpixel_order: Subpixel order of LCD panels.
 126          */
 127         enum subpixel_order subpixel_order;
 128
 129 #define DRM_COLOR_FORMAT_RGB444         (1<<0)
 130 #define DRM_COLOR_FORMAT_YCRCB444       (1<<1)
 131 #define DRM_COLOR_FORMAT_YCRCB422       (1<<2)
 132
 133         /**
 134          * @color_formats: HDMI Color formats, selects between RGB and YCrCb
 135          * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
 136          * as used to describe the pixel format in framebuffers, and also don't
 137          * match the formats in @bus_formats which are shared with v4l.
 138          */
 139         u32 color_formats;
 140
 141         /**
 142          * @bus_formats: Pixel data format on the wire, somewhat redundant with
 143          * @color_formats. Array of size @num_bus_formats encoded using
 144          * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers.
 145          */
 146         const u32 *bus_formats;
 147         /**
 148          * @num_bus_formats: Size of @bus_formats array.
 149          */
 150         unsigned int num_bus_formats;
 151
 152 #define DRM_BUS_FLAG_DE_LOW             (1<<0)
 153 #define DRM_BUS_FLAG_DE_HIGH            (1<<1)
 154 /* drive data on pos. edge */
 155 #define DRM_BUS_FLAG_PIXDATA_POSEDGE    (1<<2)
 156 /* drive data on neg. edge */
 157 #define DRM_BUS_FLAG_PIXDATA_NEGEDGE    (1<<3)
 158
 159         /**
 160          * @bus_flags: Additional information (like pixel signal polarity) for
 161          * the pixel data on the bus, using DRM_BUS_FLAGS\_ defines.
 162          */
 163         u32 bus_flags;
 164
 165         /**
 166          * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even
 167          * more stuff redundant with @bus_formats.
 168          */
 169         u8 edid_hdmi_dc_modes;
 170
 171         /**
 172          * @cea_rev: CEA revision of the HDMI sink.
 173          */
 174         u8 cea_rev;
 175 };
 176
 177 int drm_display_info_set_bus_formats(struct drm_display_info *info,
 178                                      const u32 *formats,
 179                                      unsigned int num_formats);
 180
 181 /**
 182  * struct drm_connector_state - mutable connector state
 183  * @connector: backpointer to the connector
 184  * @crtc: CRTC to connect connector to, NULL if disabled
 185  * @best_encoder: can be used by helpers and drivers to select the encoder
 186  * @state: backpointer to global drm_atomic_state
 187  */
 188 struct drm_connector_state {
 189         struct drm_connector *connector;
 190
 191         struct drm_crtc *crtc;  /* do not write directly, use drm_atomic_set_crtc_for_connector() */
 192
 193         struct drm_encoder *best_encoder;
 194
 195         struct drm_atomic_state *state;
 196 };
 197
 198 /**
 199  * struct drm_connector_funcs - control connectors on a given device
 200  *
 201  * Each CRTC may have one or more connectors attached to it.  The functions
 202  * below allow the core DRM code to control connectors, enumerate available modes,
 203  * etc.
 204  */
 205 struct drm_connector_funcs {
 206         /**
 207          * @dpms:
 208          *
 209          * Legacy entry point to set the per-connector DPMS state. Legacy DPMS
 210          * is exposed as a standard property on the connector, but diverted to
 211          * this callback in the drm core. Note that atomic drivers don't
 212          * implement the 4 level DPMS support on the connector any more, but
 213          * instead only have an on/off "ACTIVE" property on the CRTC object.
 214          *
 215          * Drivers implementing atomic modeset should use
 216          * drm_atomic_helper_connector_dpms() to implement this hook.
 217          *
 218          * RETURNS:
 219          *
 220          * 0 on success or a negative error code on failure.
 221          */
 222         int (*dpms)(struct drm_connector *connector, int mode);
 223
 224         /**
 225          * @reset:
 226          *
 227          * Reset connector hardware and software state to off. This function isn't
 228          * called by the core directly, only through drm_mode_config_reset().
 229          * It's not a helper hook only for historical reasons.
 230          *
 231          * Atomic drivers can use drm_atomic_helper_connector_reset() to reset
 232          * atomic state using this hook.
 233          */
 234         void (*reset)(struct drm_connector *connector);
 235
 236         /**
 237          * @detect:
 238          *
 239          * Check to see if anything is attached to the connector. The parameter
 240          * force is set to false whilst polling, true when checking the
 241          * connector due to a user request. force can be used by the driver to
 242          * avoid expensive, destructive operations during automated probing.
 243          *
 244          * FIXME:
 245          *
 246          * Note that this hook is only called by the probe helper. It's not in
 247          * the helper library vtable purely for historical reasons. The only DRM
 248          * core entry point to probe connector state is @fill_modes.
 249          *
 250          * RETURNS:
 251          *
 252          * drm_connector_status indicating the connector's status.
 253          */
 254         enum drm_connector_status (*detect)(struct drm_connector *connector,
 255                                             bool force);
 256
 257         /**
 258          * @force:
 259          *
 260          * This function is called to update internal encoder state when the
 261          * connector is forced to a certain state by userspace, either through
 262          * the sysfs interfaces or on the kernel cmdline. In that case the
 263          * @detect callback isn't called.
 264          *
 265          * FIXME:
 266          *
 267          * Note that this hook is only called by the probe helper. It's not in
 268          * the helper library vtable purely for historical reasons. The only DRM
 269          * core entry point to probe connector state is @fill_modes.
 270          */
 271         void (*force)(struct drm_connector *connector);
 272
 273         /**
 274          * @fill_modes:
 275          *
 276          * Entry point for output detection and basic mode validation. The
 277          * driver should reprobe the output if needed (e.g. when hotplug
 278          * handling is unreliable), add all detected modes to connector->modes
 279          * and filter out any the device can't support in any configuration. It
 280          * also needs to filter out any modes wider or higher than the
 281          * parameters max_width and max_height indicate.
 282          *
 283          * The drivers must also prune any modes no longer valid from
 284          * connector->modes. Furthermore it must update connector->status and
 285          * connector->edid.  If no EDID has been received for this output
 286          * connector->edid must be NULL.
 287          *
 288          * Drivers using the probe helpers should use
 289          * drm_helper_probe_single_connector_modes() or
 290          * drm_helper_probe_single_connector_modes_nomerge() to implement this
 291          * function.
 292          *
 293          * RETURNS:
 294          *
 295          * The number of modes detected and filled into connector->modes.
 296          */
 297         int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
 298
 299         /**
 300          * @set_property:
 301          *
 302          * This is the legacy entry point to update a property attached to the
 303          * connector.
 304          *
 305          * Drivers implementing atomic modeset should use
 306          * drm_atomic_helper_connector_set_property() to implement this hook.
 307          *
 308          * This callback is optional if the driver does not support any legacy
 309          * driver-private properties.
 310          *
 311          * RETURNS:
 312          *
 313          * 0 on success or a negative error code on failure.
 314          */
 315         int (*set_property)(struct drm_connector *connector, struct drm_property *property,
 316                              uint64_t val);
 317
 318         /**
 319          * @late_register:
 320          *
 321          * This optional hook can be used to register additional userspace
 322          * interfaces attached to the connector, light backlight control, i2c,
 323          * DP aux or similar interfaces. It is called late in the driver load
 324          * sequence from drm_connector_register() when registering all the
 325          * core drm connector interfaces. Everything added from this callback
 326          * should be unregistered in the early_unregister callback.
 327          *
 328          * Returns:
 329          *
 330          * 0 on success, or a negative error code on failure.
 331          */
 332         int (*late_register)(struct drm_connector *connector);
 333
 334         /**
 335          * @early_unregister:
 336          *
 337          * This optional hook should be used to unregister the additional
 338          * userspace interfaces attached to the connector from
 339          * late_unregister(). It is called from drm_connector_unregister(),
 340          * early in the driver unload sequence to disable userspace access
 341          * before data structures are torndown.
 342          */
 343         void (*early_unregister)(struct drm_connector *connector);
 344
 345         /**
 346          * @destroy:
 347          *
 348          * Clean up connector resources. This is called at driver unload time
 349          * through drm_mode_config_cleanup(). It can also be called at runtime
 350          * when a connector is being hot-unplugged for drivers that support
 351          * connector hotplugging (e.g. DisplayPort MST).
 352          */
 353         void (*destroy)(struct drm_connector *connector);
 354
 355         /**
 356          * @atomic_duplicate_state:
 357          *
 358          * Duplicate the current atomic state for this connector and return it.
 359          * The core and helpers gurantee that any atomic state duplicated with
 360          * this hook and still owned by the caller (i.e. not transferred to the
 361          * driver by calling ->atomic_commit() from struct
 362          * &drm_mode_config_funcs) will be cleaned up by calling the
 363          * @atomic_destroy_state hook in this structure.
 364          *
 365          * Atomic drivers which don't subclass struct &drm_connector_state should use
 366          * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the
 367          * state structure to extend it with driver-private state should use
 368          * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is
 369          * duplicated in a consistent fashion across drivers.
 370          *
 371          * It is an error to call this hook before connector->state has been
 372          * initialized correctly.
 373          *
 374          * NOTE:
 375          *
 376          * If the duplicate state references refcounted resources this hook must
 377          * acquire a reference for each of them. The driver must release these
 378          * references again in @atomic_destroy_state.
 379          *
 380          * RETURNS:
 381          *
 382          * Duplicated atomic state or NULL when the allocation failed.
 383          */
 384         struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector);
 385
 386         /**
 387          * @atomic_destroy_state:
 388          *
 389          * Destroy a state duplicated with @atomic_duplicate_state and release
 390          * or unreference all resources it references
 391          */
 392         void (*atomic_destroy_state)(struct drm_connector *connector,
 393                                      struct drm_connector_state *state);
 394
 395         /**
 396          * @atomic_set_property:
 397          *
 398          * Decode a driver-private property value and store the decoded value
 399          * into the passed-in state structure. Since the atomic core decodes all
 400          * standardized properties (even for extensions beyond the core set of
 401          * properties which might not be implemented by all drivers) this
 402          * requires drivers to subclass the state structure.
 403          *
 404          * Such driver-private properties should really only be implemented for
 405          * truly hardware/vendor specific state. Instead it is preferred to
 406          * standardize atomic extension and decode the properties used to expose
 407          * such an extension in the core.
 408          *
 409          * Do not call this function directly, use
 410          * drm_atomic_connector_set_property() instead.
 411          *
 412          * This callback is optional if the driver does not support any
 413          * driver-private atomic properties.
 414          *
 415          * NOTE:
 416          *
 417          * This function is called in the state assembly phase of atomic
 418          * modesets, which can be aborted for any reason (including on
 419          * userspace's request to just check whether a configuration would be
 420          * possible). Drivers MUST NOT touch any persistent state (hardware or
 421          * software) or data structures except the passed in @state parameter.
 422          *
 423          * Also since userspace controls in which order properties are set this
 424          * function must not do any input validation (since the state update is
 425          * incomplete and hence likely inconsistent). Instead any such input
 426          * validation must be done in the various atomic_check callbacks.
 427          *
 428          * RETURNS:
 429          *
 430          * 0 if the property has been found, -EINVAL if the property isn't
 431          * implemented by the driver (which shouldn't ever happen, the core only
 432          * asks for properties attached to this connector). No other validation
 433          * is allowed by the driver. The core already checks that the property
 434          * value is within the range (integer, valid enum value, ...) the driver
 435          * set when registering the property.
 436          */
 437         int (*atomic_set_property)(struct drm_connector *connector,
 438                                    struct drm_connector_state *state,
 439                                    struct drm_property *property,
 440                                    uint64_t val);
 441
 442         /**
 443          * @atomic_get_property:
 444          *
 445          * Reads out the decoded driver-private property. This is used to
 446          * implement the GETCONNECTOR IOCTL.
 447          *
 448          * Do not call this function directly, use
 449          * drm_atomic_connector_get_property() instead.
 450          *
 451          * This callback is optional if the driver does not support any
 452          * driver-private atomic properties.
 453          *
 454          * RETURNS:
 455          *
 456          * 0 on success, -EINVAL if the property isn't implemented by the
 457          * driver (which shouldn't ever happen, the core only asks for
 458          * properties attached to this connector).
 459          */
 460         int (*atomic_get_property)(struct drm_connector *connector,
 461                                    const struct drm_connector_state *state,
 462                                    struct drm_property *property,
 463                                    uint64_t *val);
 464 };
 465
 466 /* mode specified on the command line */
 467 struct drm_cmdline_mode {
 468         bool specified;
 469         bool refresh_specified;
 470         bool bpp_specified;
 471         int xres, yres;
 472         int bpp;
 473         int refresh;
 474         bool rb;
 475         bool interlace;
 476         bool cvt;
 477         bool margins;
 478         enum drm_connector_force force;
 479 };
 480
 481 /**
 482  * struct drm_connector - central DRM connector control structure
 483  * @dev: parent DRM device
 484  * @kdev: kernel device for sysfs attributes
 485  * @attr: sysfs attributes
 486  * @head: list management
 487  * @base: base KMS object
 488  * @name: human readable name, can be overwritten by the driver
 489  * @connector_type: one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
 490  * @connector_type_id: index into connector type enum
 491  * @interlace_allowed: can this connector handle interlaced modes?
 492  * @doublescan_allowed: can this connector handle doublescan?
 493  * @stereo_allowed: can this connector handle stereo modes?
 494  * @registered: is this connector exposed (registered) with userspace?
 495  * @modes: modes available on this connector (from fill_modes() + user)
 496  * @status: one of the drm_connector_status enums (connected, not, or unknown)
 497  * @probed_modes: list of modes derived directly from the display
 498  * @funcs: connector control functions
 499  * @edid_blob_ptr: DRM property containing EDID if present
 500  * @properties: property tracking for this connector
 501  * @dpms: current dpms state
 502  * @helper_private: mid-layer private data
 503  * @cmdline_mode: mode line parsed from the kernel cmdline for this connector
 504  * @force: a DRM_FORCE_<foo> state for forced mode sets
 505  * @override_edid: has the EDID been overwritten through debugfs for testing?
 506  * @encoder_ids: valid encoders for this connector
 507  * @encoder: encoder driving this connector, if any
 508  * @eld: EDID-like data, if present
 509  * @dvi_dual: dual link DVI, if found
 510  * @max_tmds_clock: max clock rate, if found
 511  * @latency_present: AV delay info from ELD, if found
 512  * @video_latency: video latency info from ELD, if found
 513  * @audio_latency: audio latency info from ELD, if found
 514  * @null_edid_counter: track sinks that give us all zeros for the EDID
 515  * @bad_edid_counter: track sinks that give us an EDID with invalid checksum
 516  * @edid_corrupt: indicates whether the last read EDID was corrupt
 517  * @debugfs_entry: debugfs directory for this connector
 518  * @state: current atomic state for this connector
 519  * @has_tile: is this connector connected to a tiled monitor
 520  * @tile_group: tile group for the connected monitor
 521  * @tile_is_single_monitor: whether the tile is one monitor housing
 522  * @num_h_tile: number of horizontal tiles in the tile group
 523  * @num_v_tile: number of vertical tiles in the tile group
 524  * @tile_h_loc: horizontal location of this tile
 525  * @tile_v_loc: vertical location of this tile
 526  * @tile_h_size: horizontal size of this tile.
 527  * @tile_v_size: vertical size of this tile.
 528  *
 529  * Each connector may be connected to one or more CRTCs, or may be clonable by
 530  * another connector if they can share a CRTC.  Each connector also has a specific
 531  * position in the broader display (referred to as a 'screen' though it could
 532  * span multiple monitors).
 533  */
 534 struct drm_connector {
 535         struct drm_device *dev;
 536         struct device *kdev;
 537         struct device_attribute *attr;
 538         struct list_head head;
 539
 540         struct drm_mode_object base;
 541
 542         char *name;
 543
 544         /**
 545          * @index: Compacted connector index, which matches the position inside
 546          * the mode_config.list for drivers not supporting hot-add/removing. Can
 547          * be used as an array index. It is invariant over the lifetime of the
 548          * connector.
 549          */
 550         unsigned index;
 551
 552         int connector_type;
 553         int connector_type_id;
 554         bool interlace_allowed;
 555         bool doublescan_allowed;
 556         bool stereo_allowed;
 557         bool registered;
 558         struct list_head modes; /* list of modes on this connector */
 559
 560         enum drm_connector_status status;
 561
 562         /* these are modes added by probing with DDC or the BIOS */
 563         struct list_head probed_modes;
 564
 565         /**
 566          * @display_info: Display information is filled from EDID information
 567          * when a display is detected. For non hot-pluggable displays such as
 568          * flat panels in embedded systems, the driver should initialize the
 569          * display_info.width_mm and display_info.height_mm fields with the
 570          * physical size of the display.
 571          */
 572         struct drm_display_info display_info;
 573         const struct drm_connector_funcs *funcs;
 574
 575         struct drm_property_blob *edid_blob_ptr;
 576         struct drm_object_properties properties;
 577
 578         /**
 579          * @path_blob_ptr:
 580          *
 581          * DRM blob property data for the DP MST path property.
 582          */
 583         struct drm_property_blob *path_blob_ptr;
 584
 585         /**
 586          * @tile_blob_ptr:
 587          *
 588          * DRM blob property data for the tile property (used mostly by DP MST).
 589          * This is meant for screens which are driven through separate display
 590          * pipelines represented by &drm_crtc, which might not be running with
 591          * genlocked clocks. For tiled panels which are genlocked, like
 592          * dual-link LVDS or dual-link DSI, the driver should try to not expose
 593          * the tiling and virtualize both &drm_crtc and &drm_plane if needed.
 594          */
 595         struct drm_property_blob *tile_blob_ptr;
 596
 597 /* should we poll this connector for connects and disconnects */
 598 /* hot plug detectable */
 599 #define DRM_CONNECTOR_POLL_HPD (1 << 0)
 600 /* poll for connections */
 601 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
 602 /* can cleanly poll for disconnections without flickering the screen */
 603 /* DACs should rarely do this without a lot of testing */
 604 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
 605
 606         /**
 607          * @polled:
 608          *
 609          * Connector polling mode, a combination of
 610          *
 611          * DRM_CONNECTOR_POLL_HPD
 612          *     The connector generates hotplug events and doesn't need to be
 613          *     periodically polled. The CONNECT and DISCONNECT flags must not
 614          *     be set together with the HPD flag.
 615          *
 616          * DRM_CONNECTOR_POLL_CONNECT
 617          *     Periodically poll the connector for connection.
 618          *
 619          * DRM_CONNECTOR_POLL_DISCONNECT
 620          *     Periodically poll the connector for disconnection.
 621          *
 622          * Set to 0 for connectors that don't support connection status
 623          * discovery.
 624          */
 625         uint8_t polled;
 626
 627         /* requested DPMS state */
 628         int dpms;
 629
 630         const struct drm_connector_helper_funcs *helper_private;
 631
 632         /* forced on connector */
 633         struct drm_cmdline_mode cmdline_mode;
 634         enum drm_connector_force force;
 635         bool override_edid;
 636
 637 #define DRM_CONNECTOR_MAX_ENCODER 3
 638         uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER];
 639         struct drm_encoder *encoder; /* currently active encoder */
 640
 641 #define MAX_ELD_BYTES   128
 642         /* EDID bits */
 643         uint8_t eld[MAX_ELD_BYTES];
 644         bool dvi_dual;
 645         int max_tmds_clock;     /* in MHz */
 646         bool latency_present[2];
 647         int video_latency[2];   /* [0]: progressive, [1]: interlaced */
 648         int audio_latency[2];
 649         int null_edid_counter; /* needed to workaround some HW bugs where we get all 0s */
 650         unsigned bad_edid_counter;
 651
 652         /* Flag for raw EDID header corruption - used in Displayport
 653          * compliance testing - * Displayport Link CTS Core 1.2 rev1.1 4.2.2.6
 654          */
 655         bool edid_corrupt;
 656
 657         struct dentry *debugfs_entry;
 658
 659         struct drm_connector_state *state;
 660
 661         /* DisplayID bits */
 662         bool has_tile;
 663         struct drm_tile_group *tile_group;
 664         bool tile_is_single_monitor;
 665
 666         uint8_t num_h_tile, num_v_tile;
 667         uint8_t tile_h_loc, tile_v_loc;
 668         uint16_t tile_h_size, tile_v_size;
 669 };
 670
 671 #define obj_to_connector(x) container_of(x, struct drm_connector, base)
 672
 673 int drm_connector_init(struct drm_device *dev,
 674                        struct drm_connector *connector,
 675                        const struct drm_connector_funcs *funcs,
 676                        int connector_type);
 677 int drm_connector_register(struct drm_connector *connector);
 678 void drm_connector_unregister(struct drm_connector *connector);
 679 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
 680                                       struct drm_encoder *encoder);
 681
 682 void drm_connector_cleanup(struct drm_connector *connector);
 683 static inline unsigned drm_connector_index(struct drm_connector *connector)
 684 {
 685         return connector->index;
 686 }
 687
 688 /**
 689  * drm_connector_lookup - lookup connector object
 690  * @dev: DRM device
 691  * @id: connector object id
 692  *
 693  * This function looks up the connector object specified by id
 694  * add takes a reference to it.
 695  */
 696 static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
 697                 uint32_t id)
 698 {
 699         struct drm_mode_object *mo;
 700         mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_CONNECTOR);
 701         return mo ? obj_to_connector(mo) : NULL;
 702 }
 703
 704 /**
 705  * drm_connector_reference - incr the connector refcnt
 706  * @connector: connector
 707  *
 708  * This function increments the connector's refcount.
 709  */
 710 static inline void drm_connector_reference(struct drm_connector *connector)
 711 {
 712         drm_mode_object_reference(&connector->base);
 713 }
 714
 715 /**
 716  * drm_connector_unreference - unref a connector
 717  * @connector: connector to unref
 718  *
 719  * This function decrements the connector's refcount and frees it if it drops to zero.
 720  */
 721 static inline void drm_connector_unreference(struct drm_connector *connector)
 722 {
 723         drm_mode_object_unreference(&connector->base);
 724 }
 725
 726 const char *drm_get_connector_status_name(enum drm_connector_status status);
 727 const char *drm_get_subpixel_order_name(enum subpixel_order order);
 728 const char *drm_get_dpms_name(int val);
 729 const char *drm_get_dvi_i_subconnector_name(int val);
 730 const char *drm_get_dvi_i_select_name(int val);
 731 const char *drm_get_tv_subconnector_name(int val);
 732 const char *drm_get_tv_select_name(int val);
 733
 734 int drm_mode_create_dvi_i_properties(struct drm_device *dev);
 735 int drm_mode_create_tv_properties(struct drm_device *dev,
 736                                   unsigned int num_modes,
 737                                   const char * const modes[]);
 738 int drm_mode_create_scaling_mode_property(struct drm_device *dev);
 739 int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
 740 int drm_mode_create_suggested_offset_properties(struct drm_device *dev);
 741
 742 int drm_mode_connector_set_path_property(struct drm_connector *connector,
 743                                          const char *path);
 744 int drm_mode_connector_set_tile_property(struct drm_connector *connector);
 745 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
 746                                             const struct edid *edid);
 747 #endif