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