include/drm/drm_modes.h

   1 /*
   2  * Copyright © 2006 Keith Packard
   3  * Copyright © 2007-2008 Dave Airlie
   4  * Copyright © 2007-2008 Intel Corporation
   5  *   Jesse Barnes <jesse.barnes@intel.com>
   6  * Copyright © 2014 Intel Corporation
   7  *   Daniel Vetter <daniel.vetter@ffwll.ch>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27 #ifndef __DRM_MODES_H__
  28 #define __DRM_MODES_H__
  29
  30 #include <linux/hdmi.h>
  31
  32 #include <drm/drm_mode_object.h>
  33 #include <drm/drm_connector.h>
  34
  35 struct videomode;
  36
  37 /*
  38  * Note on terminology:  here, for brevity and convenience, we refer to connector
  39  * control chips as 'CRTCs'.  They can control any type of connector, VGA, LVDS,
  40  * DVI, etc.  And 'screen' refers to the whole of the visible display, which
  41  * may span multiple monitors (and therefore multiple CRTC and connector
  42  * structures).
  43  */
  44
  45 /**
  46  * enum drm_mode_status - hardware support status of a mode
  47  * @MODE_OK: Mode OK
  48  * @MODE_HSYNC: hsync out of range
  49  * @MODE_VSYNC: vsync out of range
  50  * @MODE_H_ILLEGAL: mode has illegal horizontal timings
  51  * @MODE_V_ILLEGAL: mode has illegal horizontal timings
  52  * @MODE_BAD_WIDTH: requires an unsupported linepitch
  53  * @MODE_NOMODE: no mode with a matching name
  54  * @MODE_NO_INTERLACE: interlaced mode not supported
  55  * @MODE_NO_DBLESCAN: doublescan mode not supported
  56  * @MODE_NO_VSCAN: multiscan mode not supported
  57  * @MODE_MEM: insufficient video memory
  58  * @MODE_VIRTUAL_X: mode width too large for specified virtual size
  59  * @MODE_VIRTUAL_Y: mode height too large for specified virtual size
  60  * @MODE_MEM_VIRT: insufficient video memory given virtual size
  61  * @MODE_NOCLOCK: no fixed clock available
  62  * @MODE_CLOCK_HIGH: clock required is too high
  63  * @MODE_CLOCK_LOW: clock required is too low
  64  * @MODE_CLOCK_RANGE: clock/mode isn't in a ClockRange
  65  * @MODE_BAD_HVALUE: horizontal timing was out of range
  66  * @MODE_BAD_VVALUE: vertical timing was out of range
  67  * @MODE_BAD_VSCAN: VScan value out of range
  68  * @MODE_HSYNC_NARROW: horizontal sync too narrow
  69  * @MODE_HSYNC_WIDE: horizontal sync too wide
  70  * @MODE_HBLANK_NARROW: horizontal blanking too narrow
  71  * @MODE_HBLANK_WIDE: horizontal blanking too wide
  72  * @MODE_VSYNC_NARROW: vertical sync too narrow
  73  * @MODE_VSYNC_WIDE: vertical sync too wide
  74  * @MODE_VBLANK_NARROW: vertical blanking too narrow
  75  * @MODE_VBLANK_WIDE: vertical blanking too wide
  76  * @MODE_PANEL: exceeds panel dimensions
  77  * @MODE_INTERLACE_WIDTH: width too large for interlaced mode
  78  * @MODE_ONE_WIDTH: only one width is supported
  79  * @MODE_ONE_HEIGHT: only one height is supported
  80  * @MODE_ONE_SIZE: only one resolution is supported
  81  * @MODE_NO_REDUCED: monitor doesn't accept reduced blanking
  82  * @MODE_NO_STEREO: stereo modes not supported
  83  * @MODE_NO_420: ycbcr 420 modes not supported
  84  * @MODE_STALE: mode has become stale
  85  * @MODE_BAD: unspecified reason
  86  * @MODE_ERROR: error condition
  87  *
  88  * This enum is used to filter out modes not supported by the driver/hardware
  89  * combination.
  90  */
  91 enum drm_mode_status {
  92         MODE_OK = 0,
  93         MODE_HSYNC,
  94         MODE_VSYNC,
  95         MODE_H_ILLEGAL,
  96         MODE_V_ILLEGAL,
  97         MODE_BAD_WIDTH,
  98         MODE_NOMODE,
  99         MODE_NO_INTERLACE,
 100         MODE_NO_DBLESCAN,
 101         MODE_NO_VSCAN,
 102         MODE_MEM,
 103         MODE_VIRTUAL_X,
 104         MODE_VIRTUAL_Y,
 105         MODE_MEM_VIRT,
 106         MODE_NOCLOCK,
 107         MODE_CLOCK_HIGH,
 108         MODE_CLOCK_LOW,
 109         MODE_CLOCK_RANGE,
 110         MODE_BAD_HVALUE,
 111         MODE_BAD_VVALUE,
 112         MODE_BAD_VSCAN,
 113         MODE_HSYNC_NARROW,
 114         MODE_HSYNC_WIDE,
 115         MODE_HBLANK_NARROW,
 116         MODE_HBLANK_WIDE,
 117         MODE_VSYNC_NARROW,
 118         MODE_VSYNC_WIDE,
 119         MODE_VBLANK_NARROW,
 120         MODE_VBLANK_WIDE,
 121         MODE_PANEL,
 122         MODE_INTERLACE_WIDTH,
 123         MODE_ONE_WIDTH,
 124         MODE_ONE_HEIGHT,
 125         MODE_ONE_SIZE,
 126         MODE_NO_REDUCED,
 127         MODE_NO_STEREO,
 128         MODE_NO_420,
 129         MODE_STALE = -3,
 130         MODE_BAD = -2,
 131         MODE_ERROR = -1
 132 };
 133
 134 #define DRM_MODE_TYPE_CLOCK_CRTC_C (DRM_MODE_TYPE_CLOCK_C | \
 135                                     DRM_MODE_TYPE_CRTC_C)
 136
 137 #define DRM_MODE(nm, t, c, hd, hss, hse, ht, hsk, vd, vss, vse, vt, vs, f) \
 138         .name = nm, .status = 0, .type = (t), .clock = (c), \
 139         .hdisplay = (hd), .hsync_start = (hss), .hsync_end = (hse), \
 140         .htotal = (ht), .hskew = (hsk), .vdisplay = (vd), \
 141         .vsync_start = (vss), .vsync_end = (vse), .vtotal = (vt), \
 142         .vscan = (vs), .flags = (f), \
 143         .base.type = DRM_MODE_OBJECT_MODE
 144
 145 #define CRTC_INTERLACE_HALVE_V  (1 << 0) /* halve V values for interlacing */
 146 #define CRTC_STEREO_DOUBLE      (1 << 1) /* adjust timings for stereo modes */
 147 #define CRTC_NO_DBLSCAN         (1 << 2) /* don't adjust doublescan */
 148 #define CRTC_NO_VSCAN           (1 << 3) /* don't adjust doublescan */
 149 #define CRTC_STEREO_DOUBLE_ONLY (CRTC_STEREO_DOUBLE | CRTC_NO_DBLSCAN | CRTC_NO_VSCAN)
 150
 151 #define DRM_MODE_FLAG_3D_MAX    DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF
 152
 153 /**
 154  * struct drm_display_mode - DRM kernel-internal display mode structure
 155  * @hdisplay: horizontal display size
 156  * @hsync_start: horizontal sync start
 157  * @hsync_end: horizontal sync end
 158  * @htotal: horizontal total size
 159  * @hskew: horizontal skew?!
 160  * @vdisplay: vertical display size
 161  * @vsync_start: vertical sync start
 162  * @vsync_end: vertical sync end
 163  * @vtotal: vertical total size
 164  * @vscan: vertical scan?!
 165  * @crtc_hdisplay: hardware mode horizontal display size
 166  * @crtc_hblank_start: hardware mode horizontal blank start
 167  * @crtc_hblank_end: hardware mode horizontal blank end
 168  * @crtc_hsync_start: hardware mode horizontal sync start
 169  * @crtc_hsync_end: hardware mode horizontal sync end
 170  * @crtc_htotal: hardware mode horizontal total size
 171  * @crtc_hskew: hardware mode horizontal skew?!
 172  * @crtc_vdisplay: hardware mode vertical display size
 173  * @crtc_vblank_start: hardware mode vertical blank start
 174  * @crtc_vblank_end: hardware mode vertical blank end
 175  * @crtc_vsync_start: hardware mode vertical sync start
 176  * @crtc_vsync_end: hardware mode vertical sync end
 177  * @crtc_vtotal: hardware mode vertical total size
 178  *
 179  * The horizontal and vertical timings are defined per the following diagram.
 180  *
 181  * ::
 182  *
 183  *
 184  *               Active                 Front           Sync           Back
 185  *              Region                 Porch                          Porch
 186  *     <-----------------------><----------------><-------------><-------------->
 187  *       //////////////////////|
 188  *      ////////////////////// |
 189  *     //////////////////////  |..................               ................
 190  *                                                _______________
 191  *     <----- [hv]display ----->
 192  *     <------------- [hv]sync_start ------------>
 193  *     <--------------------- [hv]sync_end --------------------->
 194  *     <-------------------------------- [hv]total ----------------------------->*
 195  *
 196  * This structure contains two copies of timings. First are the plain timings,
 197  * which specify the logical mode, as it would be for a progressive 1:1 scanout
 198  * at the refresh rate userspace can observe through vblank timestamps. Then
 199  * there's the hardware timings, which are corrected for interlacing,
 200  * double-clocking and similar things. They are provided as a convenience, and
 201  * can be appropriately computed using drm_mode_set_crtcinfo().
 202  *
 203  * For printing you can use %DRM_MODE_FMT and DRM_MODE_ARG().
 204  */
 205 struct drm_display_mode {
 206         /**
 207          * @head:
 208          *
 209          * struct list_head for mode lists.
 210          */
 211         struct list_head head;
 212
 213         /**
 214          * @base:
 215          *
 216          * A display mode is a normal modeset object, possibly including public
 217          * userspace id.
 218          *
 219          * FIXME:
 220          *
 221          * This can probably be removed since the entire concept of userspace
 222          * managing modes explicitly has never landed in upstream kernel mode
 223          * setting support.
 224          */
 225         struct drm_mode_object base;
 226
 227         /**
 228          * @name:
 229          *
 230          * Human-readable name of the mode, filled out with drm_mode_set_name().
 231          */
 232         char name[DRM_DISPLAY_MODE_LEN];
 233
 234         /**
 235          * @status:
 236          *
 237          * Status of the mode, used to filter out modes not supported by the
 238          * hardware. See enum &drm_mode_status.
 239          */
 240         enum drm_mode_status status;
 241
 242         /**
 243          * @type:
 244          *
 245          * A bitmask of flags, mostly about the source of a mode. Possible flags
 246          * are:
 247          *
 248          *  - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, effectively
 249          *    unused.
 250          *  - DRM_MODE_TYPE_PREFERRED: Preferred mode, usually the native
 251          *    resolution of an LCD panel. There should only be one preferred
 252          *    mode per connector at any given time.
 253          *  - DRM_MODE_TYPE_DRIVER: Mode created by the driver, which is all of
 254          *    them really. Drivers must set this bit for all modes they create
 255          *    and expose to userspace.
 256          *
 257          * Plus a big list of flags which shouldn't be used at all, but are
 258          * still around since these flags are also used in the userspace ABI:
 259          *
 260          *  - DRM_MODE_TYPE_DEFAULT: Again a leftover, use
 261          *    DRM_MODE_TYPE_PREFERRED instead.
 262          *  - DRM_MODE_TYPE_CLOCK_C and DRM_MODE_TYPE_CRTC_C: Define leftovers
 263          *    which are stuck around for hysterical raisins only. No one has an
 264          *    idea what they were meant for. Don't use.
 265          *  - DRM_MODE_TYPE_USERDEF: Mode defined by userspace, again a vestige
 266          *    from older kms designs where userspace had to first add a custom
 267          *    mode to the kernel's mode list before it could use it. Don't use.
 268          */
 269         unsigned int type;
 270
 271         /**
 272          * @clock:
 273          *
 274          * Pixel clock in kHz.
 275          */
 276         int clock;              /* in kHz */
 277         int hdisplay;
 278         int hsync_start;
 279         int hsync_end;
 280         int htotal;
 281         int hskew;
 282         int vdisplay;
 283         int vsync_start;
 284         int vsync_end;
 285         int vtotal;
 286         int vscan;
 287         /**
 288          * @flags:
 289          *
 290          * Sync and timing flags:
 291          *
 292          *  - DRM_MODE_FLAG_PHSYNC: horizontal sync is active high.
 293          *  - DRM_MODE_FLAG_NHSYNC: horizontal sync is active low.
 294          *  - DRM_MODE_FLAG_PVSYNC: vertical sync is active high.
 295          *  - DRM_MODE_FLAG_NVSYNC: vertical sync is active low.
 296          *  - DRM_MODE_FLAG_INTERLACE: mode is interlaced.
 297          *  - DRM_MODE_FLAG_DBLSCAN: mode uses doublescan.
 298          *  - DRM_MODE_FLAG_CSYNC: mode uses composite sync.
 299          *  - DRM_MODE_FLAG_PCSYNC: composite sync is active high.
 300          *  - DRM_MODE_FLAG_NCSYNC: composite sync is active low.
 301          *  - DRM_MODE_FLAG_HSKEW: hskew provided (not used?).
 302          *  - DRM_MODE_FLAG_BCAST: not used?
 303          *  - DRM_MODE_FLAG_PIXMUX: not used?
 304          *  - DRM_MODE_FLAG_DBLCLK: double-clocked mode.
 305          *  - DRM_MODE_FLAG_CLKDIV2: half-clocked mode.
 306          *
 307          * Additionally there's flags to specify how 3D modes are packed:
 308          *
 309          *  - DRM_MODE_FLAG_3D_NONE: normal, non-3D mode.
 310          *  - DRM_MODE_FLAG_3D_FRAME_PACKING: 2 full frames for left and right.
 311          *  - DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE: interleaved like fields.
 312          *  - DRM_MODE_FLAG_3D_LINE_ALTERNATIVE: interleaved lines.
 313          *  - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL: side-by-side full frames.
 314          *  - DRM_MODE_FLAG_3D_L_DEPTH: ?
 315          *  - DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH: ?
 316          *  - DRM_MODE_FLAG_3D_TOP_AND_BOTTOM: frame split into top and bottom
 317          *    parts.
 318          *  - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF: frame split into left and
 319          *    right parts.
 320          */
 321         unsigned int flags;
 322
 323         /**
 324          * @width_mm:
 325          *
 326          * Addressable size of the output in mm, projectors should set this to
 327          * 0.
 328          */
 329         int width_mm;
 330
 331         /**
 332          * @height_mm:
 333          *
 334          * Addressable size of the output in mm, projectors should set this to
 335          * 0.
 336          */
 337         int height_mm;
 338
 339         /**
 340          * @crtc_clock:
 341          *
 342          * Actual pixel or dot clock in the hardware. This differs from the
 343          * logical @clock when e.g. using interlacing, double-clocking, stereo
 344          * modes or other fancy stuff that changes the timings and signals
 345          * actually sent over the wire.
 346          *
 347          * This is again in kHz.
 348          *
 349          * Note that with digital outputs like HDMI or DP there's usually a
 350          * massive confusion between the dot clock and the signal clock at the
 351          * bit encoding level. Especially when a 8b/10b encoding is used and the
 352          * difference is exactly a factor of 10.
 353          */
 354         int crtc_clock;
 355         int crtc_hdisplay;
 356         int crtc_hblank_start;
 357         int crtc_hblank_end;
 358         int crtc_hsync_start;
 359         int crtc_hsync_end;
 360         int crtc_htotal;
 361         int crtc_hskew;
 362         int crtc_vdisplay;
 363         int crtc_vblank_start;
 364         int crtc_vblank_end;
 365         int crtc_vsync_start;
 366         int crtc_vsync_end;
 367         int crtc_vtotal;
 368
 369         /**
 370          * @private:
 371          *
 372          * Pointer for driver private data. This can only be used for mode
 373          * objects passed to drivers in modeset operations. It shouldn't be used
 374          * by atomic drivers since they can store any additional data by
 375          * subclassing state structures.
 376          */
 377         int *private;
 378
 379         /**
 380          * @private_flags:
 381          *
 382          * Similar to @private, but just an integer.
 383          */
 384         int private_flags;
 385
 386         /**
 387          * @vrefresh:
 388          *
 389          * Vertical refresh rate, for debug output in human readable form. Not
 390          * used in a functional way.
 391          *
 392          * This value is in Hz.
 393          */
 394         int vrefresh;
 395
 396         /**
 397          * @hsync:
 398          *
 399          * Horizontal refresh rate, for debug output in human readable form. Not
 400          * used in a functional way.
 401          *
 402          * This value is in kHz.
 403          */
 404         int hsync;
 405
 406         /**
 407          * @picture_aspect_ratio:
 408          *
 409          * Field for setting the HDMI picture aspect ratio of a mode.
 410          */
 411         enum hdmi_picture_aspect picture_aspect_ratio;
 412 };
 413
 414 /**
 415  * DRM_MODE_FMT - printf string for &struct drm_display_mode
 416  */
 417 #define DRM_MODE_FMT    "%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x"
 418
 419 /**
 420  * DRM_MODE_ARG - printf arguments for &struct drm_display_mode
 421  * @m: display mode
 422  */
 423 #define DRM_MODE_ARG(m) \
 424         (m)->base.id, (m)->name, (m)->vrefresh, (m)->clock, \
 425         (m)->hdisplay, (m)->hsync_start, (m)->hsync_end, (m)->htotal, \
 426         (m)->vdisplay, (m)->vsync_start, (m)->vsync_end, (m)->vtotal, \
 427         (m)->type, (m)->flags
 428
 429 #define obj_to_mode(x) container_of(x, struct drm_display_mode, base)
 430
 431 /**
 432  * drm_mode_is_stereo - check for stereo mode flags
 433  * @mode: drm_display_mode to check
 434  *
 435  * Returns:
 436  * True if the mode is one of the stereo modes (like side-by-side), false if
 437  * not.
 438  */
 439 static inline bool drm_mode_is_stereo(const struct drm_display_mode *mode)
 440 {
 441         return mode->flags & DRM_MODE_FLAG_3D_MASK;
 442 }
 443
 444 struct drm_connector;
 445 struct drm_cmdline_mode;
 446
 447 struct drm_display_mode *drm_mode_create(struct drm_device *dev);
 448 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
 449 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
 450                                const struct drm_display_mode *in);
 451 int drm_mode_convert_umode(struct drm_display_mode *out,
 452                            const struct drm_mode_modeinfo *in);
 453 void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
 454 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode);
 455 bool drm_mode_is_420_only(const struct drm_display_info *display,
 456                           const struct drm_display_mode *mode);
 457 bool drm_mode_is_420_also(const struct drm_display_info *display,
 458                           const struct drm_display_mode *mode);
 459 bool drm_mode_is_420(const struct drm_display_info *display,
 460                      const struct drm_display_mode *mode);
 461
 462 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev,
 463                                       int hdisplay, int vdisplay, int vrefresh,
 464                                       bool reduced, bool interlaced,
 465                                       bool margins);
 466 struct drm_display_mode *drm_gtf_mode(struct drm_device *dev,
 467                                       int hdisplay, int vdisplay, int vrefresh,
 468                                       bool interlaced, int margins);
 469 struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev,
 470                                               int hdisplay, int vdisplay,
 471                                               int vrefresh, bool interlaced,
 472                                               int margins,
 473                                               int GTF_M, int GTF_2C,
 474                                               int GTF_K, int GTF_2J);
 475 void drm_display_mode_from_videomode(const struct videomode *vm,
 476                                      struct drm_display_mode *dmode);
 477 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
 478                                    struct videomode *vm);
 479 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags);
 480 int of_get_drm_display_mode(struct device_node *np,
 481                             struct drm_display_mode *dmode, u32 *bus_flags,
 482                             int index);
 483
 484 void drm_mode_set_name(struct drm_display_mode *mode);
 485 int drm_mode_hsync(const struct drm_display_mode *mode);
 486 int drm_mode_vrefresh(const struct drm_display_mode *mode);
 487 void drm_mode_get_hv_timing(const struct drm_display_mode *mode,
 488                             int *hdisplay, int *vdisplay);
 489
 490 void drm_mode_set_crtcinfo(struct drm_display_mode *p,
 491                            int adjust_flags);
 492 void drm_mode_copy(struct drm_display_mode *dst,
 493                    const struct drm_display_mode *src);
 494 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
 495                                             const struct drm_display_mode *mode);
 496 bool drm_mode_equal(const struct drm_display_mode *mode1,
 497                     const struct drm_display_mode *mode2);
 498 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1,
 499                               const struct drm_display_mode *mode2);
 500 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
 501                                         const struct drm_display_mode *mode2);
 502
 503 /* for use by the crtc helper probe functions */
 504 enum drm_mode_status drm_mode_validate_basic(const struct drm_display_mode *mode);
 505 enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode,
 506                                             int maxX, int maxY);
 507 enum drm_mode_status
 508 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode,
 509                            struct drm_connector *connector);
 510 void drm_mode_prune_invalid(struct drm_device *dev,
 511                             struct list_head *mode_list, bool verbose);
 512 void drm_mode_sort(struct list_head *mode_list);
 513 void drm_mode_connector_list_update(struct drm_connector *connector);
 514
 515 /* parsing cmdline modes */
 516 bool
 517 drm_mode_parse_command_line_for_connector(const char *mode_option,
 518                                           struct drm_connector *connector,
 519                                           struct drm_cmdline_mode *mode);
 520 struct drm_display_mode *
 521 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
 522                                   struct drm_cmdline_mode *cmd);
 523
 524 #endif /* __DRM_MODES_H__ */