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 #include <uapi/drm/drm_mode.h>
  31
  32 struct drm_device;
  33
  34 struct drm_connector_helper_funcs;
  35 struct drm_device;
  36 struct drm_crtc;
  37 struct drm_encoder;
  38 struct drm_property;
  39 struct drm_property_blob;
  40 struct edid;
  41
  42 enum drm_connector_force {
  43         DRM_FORCE_UNSPECIFIED,
  44         DRM_FORCE_OFF,
  45         DRM_FORCE_ON,         /* force on analog part normally */
  46         DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
  47 };
  48
  49 /**
  50  * enum drm_connector_status - status for a &drm_connector
  51  *
  52  * This enum is used to track the connector status. There are no separate
  53  * #defines for the uapi!
  54  */
  55 enum drm_connector_status {
  56         /**
  57          * @connector_status_connected: The connector is definitely connected to
  58          * a sink device, and can be enabled.
  59          */
  60         connector_status_connected = 1,
  61         /**
  62          * @connector_status_disconnected: The connector isn't connected to a
  63          * sink device which can be autodetect. For digital outputs like DP or
  64          * HDMI (which can be realiable probed) this means there's really
  65          * nothing there. It is driver-dependent whether a connector with this
  66          * status can be lit up or not.
  67          */
  68         connector_status_disconnected = 2,
  69         /**
  70          * @connector_status_unknown: The connector's status could not be
  71          * reliably detected. This happens when probing would either cause
  72          * flicker (like load-detection when the connector is in use), or when a
  73          * hardware resource isn't available (like when load-detection needs a
  74          * free CRTC). It should be possible to light up the connector with one
  75          * of the listed fallback modes. For default configuration userspace
  76          * should only try to light up connectors with unknown status when
  77          * there's not connector with @connector_status_connected.
  78          */
  79         connector_status_unknown = 3,
  80 };
  81
  82 enum subpixel_order {
  83         SubPixelUnknown = 0,
  84         SubPixelHorizontalRGB,
  85         SubPixelHorizontalBGR,
  86         SubPixelVerticalRGB,
  87         SubPixelVerticalBGR,
  88         SubPixelNone,
  89 };
  90
  91 /**
  92  * struct drm_display_info - runtime data about the connected sink
  93  *
  94  * Describes a given display (e.g. CRT or flat panel) and its limitations. For
  95  * fixed display sinks like built-in panels there's not much difference between
  96  * this and struct &drm_connector. But for sinks with a real cable this
  97  * structure is meant to describe all the things at the other end of the cable.
  98  *
  99  * For sinks which provide an EDID this can be filled out by calling
 100  * drm_add_edid_modes().
 101  */
 102 struct drm_display_info {
 103         /**
 104          * @name: Name of the display.
 105          */
 106         char name[DRM_DISPLAY_INFO_LEN];
 107
 108         /**
 109          * @width_mm: Physical width in mm.
 110          */
 111         unsigned int width_mm;
 112         /**
 113          * @height_mm: Physical height in mm.
 114          */
 115         unsigned int height_mm;
 116
 117         /**
 118          * @pixel_clock: Maximum pixel clock supported by the sink, in units of
 119          * 100Hz. This mismatches the clok in &drm_display_mode (which is in
 120          * kHZ), because that's what the EDID uses as base unit.
 121          */
 122         unsigned int pixel_clock;
 123         /**
 124          * @bpc: Maximum bits per color channel. Used by HDMI and DP outputs.
 125          */
 126         unsigned int bpc;
 127
 128         /**
 129          * @subpixel_order: Subpixel order of LCD panels.
 130          */
 131         enum subpixel_order subpixel_order;
 132
 133 #define DRM_COLOR_FORMAT_RGB444         (1<<0)
 134 #define DRM_COLOR_FORMAT_YCRCB444       (1<<1)
 135 #define DRM_COLOR_FORMAT_YCRCB422       (1<<2)
 136
 137         /**
 138          * @color_formats: HDMI Color formats, selects between RGB and YCrCb
 139          * modes. Used DRM_COLOR_FORMAT\_ defines, which are _not_ the same ones
 140          * as used to describe the pixel format in framebuffers, and also don't
 141          * match the formats in @bus_formats which are shared with v4l.
 142          */
 143         u32 color_formats;
 144
 145         /**
 146          * @bus_formats: Pixel data format on the wire, somewhat redundant with
 147          * @color_formats. Array of size @num_bus_formats encoded using
 148          * MEDIA_BUS_FMT\_ defines shared with v4l and media drivers.
 149          */
 150         const u32 *bus_formats;
 151         /**
 152          * @num_bus_formats: Size of @bus_formats array.
 153          */
 154         unsigned int num_bus_formats;
 155
 156 #define DRM_BUS_FLAG_DE_LOW             (1<<0)
 157 #define DRM_BUS_FLAG_DE_HIGH            (1<<1)
 158 /* drive data on pos. edge */
 159 #define DRM_BUS_FLAG_PIXDATA_POSEDGE    (1<<2)
 160 /* drive data on neg. edge */
 161 #define DRM_BUS_FLAG_PIXDATA_NEGEDGE    (1<<3)
 162
 163         /**
 164          * @bus_flags: Additional information (like pixel signal polarity) for
 165          * the pixel data on the bus, using DRM_BUS_FLAGS\_ defines.
 166          */
 167         u32 bus_flags;
 168
 169         /**
 170          * @max_tmds_clock: Maximum TMDS clock rate supported by the
 171          * sink in kHz. 0 means undefined.
 172          */
 173         int max_tmds_clock;
 174
 175         /**
 176          * @dvi_dual: Dual-link DVI sink?
 177          */
 178         bool dvi_dual;
 179
 180         /**
 181          * @edid_hdmi_dc_modes: Mask of supported hdmi deep color modes. Even
 182          * more stuff redundant with @bus_formats.
 183          */
 184         u8 edid_hdmi_dc_modes;
 185
 186         /**
 187          * @cea_rev: CEA revision of the HDMI sink.
 188          */
 189         u8 cea_rev;
 190 };
 191
 192 int drm_display_info_set_bus_formats(struct drm_display_info *info,
 193                                      const u32 *formats,
 194                                      unsigned int num_formats);
 195
 196 /**
 197  * struct drm_connector_state - mutable connector state
 198  * @connector: backpointer to the connector
 199  * @best_encoder: can be used by helpers and drivers to select the encoder
 200  * @state: backpointer to global drm_atomic_state
 201  */
 202 struct drm_connector_state {
 203         struct drm_connector *connector;
 204
 205         /**
 206          * @crtc: CRTC to connect connector to, NULL if disabled.
 207          *
 208          * Do not change this directly, use drm_atomic_set_crtc_for_connector()
 209          * instead.
 210          */
 211         struct drm_crtc *crtc;
 212
 213         struct drm_encoder *best_encoder;
 214
 215         struct drm_atomic_state *state;
 216 };
 217
 218 /**
 219  * struct drm_connector_funcs - control connectors on a given device
 220  *
 221  * Each CRTC may have one or more connectors attached to it.  The functions
 222  * below allow the core DRM code to control connectors, enumerate available modes,
 223  * etc.
 224  */
 225 struct drm_connector_funcs {
 226         /**
 227          * @dpms:
 228          *
 229          * Legacy entry point to set the per-connector DPMS state. Legacy DPMS
 230          * is exposed as a standard property on the connector, but diverted to
 231          * this callback in the drm core. Note that atomic drivers don't
 232          * implement the 4 level DPMS support on the connector any more, but
 233          * instead only have an on/off "ACTIVE" property on the CRTC object.
 234          *
 235          * Drivers implementing atomic modeset should use
 236          * drm_atomic_helper_connector_dpms() to implement this hook.
 237          *
 238          * RETURNS:
 239          *
 240          * 0 on success or a negative error code on failure.
 241          */
 242         int (*dpms)(struct drm_connector *connector, int mode);
 243
 244         /**
 245          * @reset:
 246          *
 247          * Reset connector hardware and software state to off. This function isn't
 248          * called by the core directly, only through drm_mode_config_reset().
 249          * It's not a helper hook only for historical reasons.
 250          *
 251          * Atomic drivers can use drm_atomic_helper_connector_reset() to reset
 252          * atomic state using this hook.
 253          */
 254         void (*reset)(struct drm_connector *connector);
 255
 256         /**
 257          * @detect:
 258          *
 259          * Check to see if anything is attached to the connector. The parameter
 260          * force is set to false whilst polling, true when checking the
 261          * connector due to a user request. force can be used by the driver to
 262          * avoid expensive, destructive operations during automated probing.
 263          *
 264          * FIXME:
 265          *
 266          * Note that this hook is only called by the probe helper. It's not in
 267          * the helper library vtable purely for historical reasons. The only DRM
 268          * core entry point to probe connector state is @fill_modes.
 269          *
 270          * RETURNS:
 271          *
 272          * drm_connector_status indicating the connector's status.
 273          */
 274         enum drm_connector_status (*detect)(struct drm_connector *connector,
 275                                             bool force);
 276
 277         /**
 278          * @force:
 279          *
 280          * This function is called to update internal encoder state when the
 281          * connector is forced to a certain state by userspace, either through
 282          * the sysfs interfaces or on the kernel cmdline. In that case the
 283          * @detect callback isn't called.
 284          *
 285          * FIXME:
 286          *
 287          * Note that this hook is only called by the probe helper. It's not in
 288          * the helper library vtable purely for historical reasons. The only DRM
 289          * core entry point to probe connector state is @fill_modes.
 290          */
 291         void (*force)(struct drm_connector *connector);
 292
 293         /**
 294          * @fill_modes:
 295          *
 296          * Entry point for output detection and basic mode validation. The
 297          * driver should reprobe the output if needed (e.g. when hotplug
 298          * handling is unreliable), add all detected modes to connector->modes
 299          * and filter out any the device can't support in any configuration. It
 300          * also needs to filter out any modes wider or higher than the
 301          * parameters max_width and max_height indicate.
 302          *
 303          * The drivers must also prune any modes no longer valid from
 304          * connector->modes. Furthermore it must update connector->status and
 305          * connector->edid.  If no EDID has been received for this output
 306          * connector->edid must be NULL.
 307          *
 308          * Drivers using the probe helpers should use
 309          * drm_helper_probe_single_connector_modes() or
 310          * drm_helper_probe_single_connector_modes_nomerge() to implement this
 311          * function.
 312          *
 313          * RETURNS:
 314          *
 315          * The number of modes detected and filled into connector->modes.
 316          */
 317         int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
 318
 319         /**
 320          * @set_property:
 321          *
 322          * This is the legacy entry point to update a property attached to the
 323          * connector.
 324          *
 325          * Drivers implementing atomic modeset should use
 326          * drm_atomic_helper_connector_set_property() to implement this hook.
 327          *
 328          * This callback is optional if the driver does not support any legacy
 329          * driver-private properties.
 330          *
 331          * RETURNS:
 332          *
 333          * 0 on success or a negative error code on failure.
 334          */
 335         int (*set_property)(struct drm_connector *connector, struct drm_property *property,
 336                              uint64_t val);
 337
 338         /**
 339          * @late_register:
 340          *
 341          * This optional hook can be used to register additional userspace
 342          * interfaces attached to the connector, light backlight control, i2c,
 343          * DP aux or similar interfaces. It is called late in the driver load
 344          * sequence from drm_connector_register() when registering all the
 345          * core drm connector interfaces. Everything added from this callback
 346          * should be unregistered in the early_unregister callback.
 347          *
 348          * Returns:
 349          *
 350          * 0 on success, or a negative error code on failure.
 351          */
 352         int (*late_register)(struct drm_connector *connector);
 353
 354         /**
 355          * @early_unregister:
 356          *
 357          * This optional hook should be used to unregister the additional
 358          * userspace interfaces attached to the connector from
 359          * late_register(). It is called from drm_connector_unregister(),
 360          * early in the driver unload sequence to disable userspace access
 361          * before data structures are torndown.
 362          */
 363         void (*early_unregister)(struct drm_connector *connector);
 364
 365         /**
 366          * @destroy:
 367          *
 368          * Clean up connector resources. This is called at driver unload time
 369          * through drm_mode_config_cleanup(). It can also be called at runtime
 370          * when a connector is being hot-unplugged for drivers that support
 371          * connector hotplugging (e.g. DisplayPort MST).
 372          */
 373         void (*destroy)(struct drm_connector *connector);
 374
 375         /**
 376          * @atomic_duplicate_state:
 377          *
 378          * Duplicate the current atomic state for this connector and return it.
 379          * The core and helpers guarantee that any atomic state duplicated with
 380          * this hook and still owned by the caller (i.e. not transferred to the
 381          * driver by calling ->atomic_commit() from struct
 382          * &drm_mode_config_funcs) will be cleaned up by calling the
 383          * @atomic_destroy_state hook in this structure.
 384          *
 385          * Atomic drivers which don't subclass struct &drm_connector_state should use
 386          * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the
 387          * state structure to extend it with driver-private state should use
 388          * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is
 389          * duplicated in a consistent fashion across drivers.
 390          *
 391          * It is an error to call this hook before connector->state has been
 392          * initialized correctly.
 393          *
 394          * NOTE:
 395          *
 396          * If the duplicate state references refcounted resources this hook must
 397          * acquire a reference for each of them. The driver must release these
 398          * references again in @atomic_destroy_state.
 399          *
 400          * RETURNS:
 401          *
 402          * Duplicated atomic state or NULL when the allocation failed.
 403          */
 404         struct drm_connector_state *(*atomic_duplicate_state)(struct drm_connector *connector);
 405
 406         /**
 407          * @atomic_destroy_state:
 408          *
 409          * Destroy a state duplicated with @atomic_duplicate_state and release
 410          * or unreference all resources it references
 411          */
 412         void (*atomic_destroy_state)(struct drm_connector *connector,
 413                                      struct drm_connector_state *state);
 414
 415         /**
 416          * @atomic_set_property:
 417          *
 418          * Decode a driver-private property value and store the decoded value
 419          * into the passed-in state structure. Since the atomic core decodes all
 420          * standardized properties (even for extensions beyond the core set of
 421          * properties which might not be implemented by all drivers) this
 422          * requires drivers to subclass the state structure.
 423          *
 424          * Such driver-private properties should really only be implemented for
 425          * truly hardware/vendor specific state. Instead it is preferred to
 426          * standardize atomic extension and decode the properties used to expose
 427          * such an extension in the core.
 428          *
 429          * Do not call this function directly, use
 430          * drm_atomic_connector_set_property() instead.
 431          *
 432          * This callback is optional if the driver does not support any
 433          * driver-private atomic properties.
 434          *
 435          * NOTE:
 436          *
 437          * This function is called in the state assembly phase of atomic
 438          * modesets, which can be aborted for any reason (including on
 439          * userspace's request to just check whether a configuration would be
 440          * possible). Drivers MUST NOT touch any persistent state (hardware or
 441          * software) or data structures except the passed in @state parameter.
 442          *
 443          * Also since userspace controls in which order properties are set this
 444          * function must not do any input validation (since the state update is
 445          * incomplete and hence likely inconsistent). Instead any such input
 446          * validation must be done in the various atomic_check callbacks.
 447          *
 448          * RETURNS:
 449          *
 450          * 0 if the property has been found, -EINVAL if the property isn't
 451          * implemented by the driver (which shouldn't ever happen, the core only
 452          * asks for properties attached to this connector). No other validation
 453          * is allowed by the driver. The core already checks that the property
 454          * value is within the range (integer, valid enum value, ...) the driver
 455          * set when registering the property.
 456          */
 457         int (*atomic_set_property)(struct drm_connector *connector,
 458                                    struct drm_connector_state *state,
 459                                    struct drm_property *property,
 460                                    uint64_t val);
 461
 462         /**
 463          * @atomic_get_property:
 464          *
 465          * Reads out the decoded driver-private property. This is used to
 466          * implement the GETCONNECTOR IOCTL.
 467          *
 468          * Do not call this function directly, use
 469          * drm_atomic_connector_get_property() instead.
 470          *
 471          * This callback is optional if the driver does not support any
 472          * driver-private atomic properties.
 473          *
 474          * RETURNS:
 475          *
 476          * 0 on success, -EINVAL if the property isn't implemented by the
 477          * driver (which shouldn't ever happen, the core only asks for
 478          * properties attached to this connector).
 479          */
 480         int (*atomic_get_property)(struct drm_connector *connector,
 481                                    const struct drm_connector_state *state,
 482                                    struct drm_property *property,
 483                                    uint64_t *val);
 484 };
 485
 486 /* mode specified on the command line */
 487 struct drm_cmdline_mode {
 488         bool specified;
 489         bool refresh_specified;
 490         bool bpp_specified;
 491         int xres, yres;
 492         int bpp;
 493         int refresh;
 494         bool rb;
 495         bool interlace;
 496         bool cvt;
 497         bool margins;
 498         enum drm_connector_force force;
 499 };
 500
 501 /**
 502  * struct drm_connector - central DRM connector control structure
 503  * @dev: parent DRM device
 504  * @kdev: kernel device for sysfs attributes
 505  * @attr: sysfs attributes
 506  * @head: list management
 507  * @base: base KMS object
 508  * @name: human readable name, can be overwritten by the driver
 509  * @connector_type: one of the DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
 510  * @connector_type_id: index into connector type enum
 511  * @interlace_allowed: can this connector handle interlaced modes?
 512  * @doublescan_allowed: can this connector handle doublescan?
 513  * @stereo_allowed: can this connector handle stereo modes?
 514  * @registered: is this connector exposed (registered) with userspace?
 515  * @modes: modes available on this connector (from fill_modes() + user)
 516  * @status: one of the drm_connector_status enums (connected, not, or unknown)
 517  * @probed_modes: list of modes derived directly from the display
 518  * @funcs: connector control functions
 519  * @edid_blob_ptr: DRM property containing EDID if present
 520  * @properties: property tracking for this connector
 521  * @dpms: current dpms state
 522  * @helper_private: mid-layer private data
 523  * @cmdline_mode: mode line parsed from the kernel cmdline for this connector
 524  * @force: a DRM_FORCE_<foo> state for forced mode sets
 525  * @override_edid: has the EDID been overwritten through debugfs for testing?
 526  * @encoder_ids: valid encoders for this connector
 527  * @encoder: encoder driving this connector, if any
 528  * @eld: EDID-like data, if present
 529  * @latency_present: AV delay info from ELD, if found
 530  * @video_latency: video latency info from ELD, if found
 531  * @audio_latency: audio latency info from ELD, if found
 532  * @null_edid_counter: track sinks that give us all zeros for the EDID
 533  * @bad_edid_counter: track sinks that give us an EDID with invalid checksum
 534  * @edid_corrupt: indicates whether the last read EDID was corrupt
 535  * @debugfs_entry: debugfs directory for this connector
 536  * @state: current atomic state for this connector
 537  * @has_tile: is this connector connected to a tiled monitor
 538  * @tile_group: tile group for the connected monitor
 539  * @tile_is_single_monitor: whether the tile is one monitor housing
 540  * @num_h_tile: number of horizontal tiles in the tile group
 541  * @num_v_tile: number of vertical tiles in the tile group
 542  * @tile_h_loc: horizontal location of this tile
 543  * @tile_v_loc: vertical location of this tile
 544  * @tile_h_size: horizontal size of this tile.
 545  * @tile_v_size: vertical size of this tile.
 546  *
 547  * Each connector may be connected to one or more CRTCs, or may be clonable by
 548  * another connector if they can share a CRTC.  Each connector also has a specific
 549  * position in the broader display (referred to as a 'screen' though it could
 550  * span multiple monitors).
 551  */
 552 struct drm_connector {
 553         struct drm_device *dev;
 554         struct device *kdev;
 555         struct device_attribute *attr;
 556         struct list_head head;
 557
 558         struct drm_mode_object base;
 559
 560         char *name;
 561
 562         /**
 563          * @index: Compacted connector index, which matches the position inside
 564          * the mode_config.list for drivers not supporting hot-add/removing. Can
 565          * be used as an array index. It is invariant over the lifetime of the
 566          * connector.
 567          */
 568         unsigned index;
 569
 570         int connector_type;
 571         int connector_type_id;
 572         bool interlace_allowed;
 573         bool doublescan_allowed;
 574         bool stereo_allowed;
 575         bool registered;
 576         struct list_head modes; /* list of modes on this connector */
 577
 578         enum drm_connector_status status;
 579
 580         /* these are modes added by probing with DDC or the BIOS */
 581         struct list_head probed_modes;
 582
 583         /**
 584          * @display_info: Display information is filled from EDID information
 585          * when a display is detected. For non hot-pluggable displays such as
 586          * flat panels in embedded systems, the driver should initialize the
 587          * display_info.width_mm and display_info.height_mm fields with the
 588          * physical size of the display.
 589          */
 590         struct drm_display_info display_info;
 591         const struct drm_connector_funcs *funcs;
 592
 593         struct drm_property_blob *edid_blob_ptr;
 594         struct drm_object_properties properties;
 595
 596         /**
 597          * @path_blob_ptr:
 598          *
 599          * DRM blob property data for the DP MST path property.
 600          */
 601         struct drm_property_blob *path_blob_ptr;
 602
 603         /**
 604          * @tile_blob_ptr:
 605          *
 606          * DRM blob property data for the tile property (used mostly by DP MST).
 607          * This is meant for screens which are driven through separate display
 608          * pipelines represented by &drm_crtc, which might not be running with
 609          * genlocked clocks. For tiled panels which are genlocked, like
 610          * dual-link LVDS or dual-link DSI, the driver should try to not expose
 611          * the tiling and virtualize both &drm_crtc and &drm_plane if needed.
 612          */
 613         struct drm_property_blob *tile_blob_ptr;
 614
 615 /* should we poll this connector for connects and disconnects */
 616 /* hot plug detectable */
 617 #define DRM_CONNECTOR_POLL_HPD (1 << 0)
 618 /* poll for connections */
 619 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
 620 /* can cleanly poll for disconnections without flickering the screen */
 621 /* DACs should rarely do this without a lot of testing */
 622 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
 623
 624         /**
 625          * @polled:
 626          *
 627          * Connector polling mode, a combination of
 628          *
 629          * DRM_CONNECTOR_POLL_HPD
 630          *     The connector generates hotplug events and doesn't need to be
 631          *     periodically polled. The CONNECT and DISCONNECT flags must not
 632          *     be set together with the HPD flag.
 633          *
 634          * DRM_CONNECTOR_POLL_CONNECT
 635          *     Periodically poll the connector for connection.
 636          *
 637          * DRM_CONNECTOR_POLL_DISCONNECT
 638          *     Periodically poll the connector for disconnection.
 639          *
 640          * Set to 0 for connectors that don't support connection status
 641          * discovery.
 642          */
 643         uint8_t polled;
 644
 645         /* requested DPMS state */
 646         int dpms;
 647
 648         const struct drm_connector_helper_funcs *helper_private;
 649
 650         /* forced on connector */
 651         struct drm_cmdline_mode cmdline_mode;
 652         enum drm_connector_force force;
 653         bool override_edid;
 654
 655 #define DRM_CONNECTOR_MAX_ENCODER 3
 656         uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER];
 657         struct drm_encoder *encoder; /* currently active encoder */
 658
 659 #define MAX_ELD_BYTES   128
 660         /* EDID bits */
 661         uint8_t eld[MAX_ELD_BYTES];
 662         bool latency_present[2];
 663         int video_latency[2];   /* [0]: progressive, [1]: interlaced */
 664         int audio_latency[2];
 665         int null_edid_counter; /* needed to workaround some HW bugs where we get all 0s */
 666         unsigned bad_edid_counter;
 667
 668         /* Flag for raw EDID header corruption - used in Displayport
 669          * compliance testing - * Displayport Link CTS Core 1.2 rev1.1 4.2.2.6
 670          */
 671         bool edid_corrupt;
 672
 673         struct dentry *debugfs_entry;
 674
 675         struct drm_connector_state *state;
 676
 677         /* DisplayID bits */
 678         bool has_tile;
 679         struct drm_tile_group *tile_group;
 680         bool tile_is_single_monitor;
 681
 682         uint8_t num_h_tile, num_v_tile;
 683         uint8_t tile_h_loc, tile_v_loc;
 684         uint16_t tile_h_size, tile_v_size;
 685 };
 686
 687 #define obj_to_connector(x) container_of(x, struct drm_connector, base)
 688
 689 int drm_connector_init(struct drm_device *dev,
 690                        struct drm_connector *connector,
 691                        const struct drm_connector_funcs *funcs,
 692                        int connector_type);
 693 int drm_connector_register(struct drm_connector *connector);
 694 void drm_connector_unregister(struct drm_connector *connector);
 695 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
 696                                       struct drm_encoder *encoder);
 697
 698 void drm_connector_cleanup(struct drm_connector *connector);
 699 static inline unsigned drm_connector_index(struct drm_connector *connector)
 700 {
 701         return connector->index;
 702 }
 703
 704 /**
 705  * drm_connector_lookup - lookup connector object
 706  * @dev: DRM device
 707  * @id: connector object id
 708  *
 709  * This function looks up the connector object specified by id
 710  * add takes a reference to it.
 711  */
 712 static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
 713                 uint32_t id)
 714 {
 715         struct drm_mode_object *mo;
 716         mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_CONNECTOR);
 717         return mo ? obj_to_connector(mo) : NULL;
 718 }
 719
 720 /**
 721  * drm_connector_reference - incr the connector refcnt
 722  * @connector: connector
 723  *
 724  * This function increments the connector's refcount.
 725  */
 726 static inline void drm_connector_reference(struct drm_connector *connector)
 727 {
 728         drm_mode_object_reference(&connector->base);
 729 }
 730
 731 /**
 732  * drm_connector_unreference - unref a connector
 733  * @connector: connector to unref
 734  *
 735  * This function decrements the connector's refcount and frees it if it drops to zero.
 736  */
 737 static inline void drm_connector_unreference(struct drm_connector *connector)
 738 {
 739         drm_mode_object_unreference(&connector->base);
 740 }
 741
 742 const char *drm_get_connector_status_name(enum drm_connector_status status);
 743 const char *drm_get_subpixel_order_name(enum subpixel_order order);
 744 const char *drm_get_dpms_name(int val);
 745 const char *drm_get_dvi_i_subconnector_name(int val);
 746 const char *drm_get_dvi_i_select_name(int val);
 747 const char *drm_get_tv_subconnector_name(int val);
 748 const char *drm_get_tv_select_name(int val);
 749
 750 int drm_mode_create_dvi_i_properties(struct drm_device *dev);
 751 int drm_mode_create_tv_properties(struct drm_device *dev,
 752                                   unsigned int num_modes,
 753                                   const char * const modes[]);
 754 int drm_mode_create_scaling_mode_property(struct drm_device *dev);
 755 int drm_mode_create_aspect_ratio_property(struct drm_device *dev);
 756 int drm_mode_create_suggested_offset_properties(struct drm_device *dev);
 757
 758 int drm_mode_connector_set_path_property(struct drm_connector *connector,
 759                                          const char *path);
 760 int drm_mode_connector_set_tile_property(struct drm_connector *connector);
 761 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
 762                                             const struct edid *edid);
 763
 764 /**
 765  * drm_for_each_connector - iterate over all connectors
 766  * @connector: the loop cursor
 767  * @dev: the DRM device
 768  *
 769  * Iterate over all connectors of @dev.
 770  */
 771 #define drm_for_each_connector(connector, dev) \
 772         for (assert_drm_connector_list_read_locked(&(dev)->mode_config),        \
 773              connector = list_first_entry(&(dev)->mode_config.connector_list,   \
 774                                           struct drm_connector, head);          \
 775              &connector->head != (&(dev)->mode_config.connector_list);          \
 776              connector = list_next_entry(connector, head))
 777
 778 #endif