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_STALE: mode has become stale 84 * @MODE_BAD: unspecified reason 85 * @MODE_ERROR: error condition 86 * 87 * This enum is used to filter out modes not supported by the driver/hardware 88 * combination. 89 */ 90 enum drm_mode_status { 91 MODE_OK = 0, 92 MODE_HSYNC, 93 MODE_VSYNC, 94 MODE_H_ILLEGAL, 95 MODE_V_ILLEGAL, 96 MODE_BAD_WIDTH, 97 MODE_NOMODE, 98 MODE_NO_INTERLACE, 99 MODE_NO_DBLESCAN, 100 MODE_NO_VSCAN, 101 MODE_MEM, 102 MODE_VIRTUAL_X, 103 MODE_VIRTUAL_Y, 104 MODE_MEM_VIRT, 105 MODE_NOCLOCK, 106 MODE_CLOCK_HIGH, 107 MODE_CLOCK_LOW, 108 MODE_CLOCK_RANGE, 109 MODE_BAD_HVALUE, 110 MODE_BAD_VVALUE, 111 MODE_BAD_VSCAN, 112 MODE_HSYNC_NARROW, 113 MODE_HSYNC_WIDE, 114 MODE_HBLANK_NARROW, 115 MODE_HBLANK_WIDE, 116 MODE_VSYNC_NARROW, 117 MODE_VSYNC_WIDE, 118 MODE_VBLANK_NARROW, 119 MODE_VBLANK_WIDE, 120 MODE_PANEL, 121 MODE_INTERLACE_WIDTH, 122 MODE_ONE_WIDTH, 123 MODE_ONE_HEIGHT, 124 MODE_ONE_SIZE, 125 MODE_NO_REDUCED, 126 MODE_NO_STEREO, 127 MODE_STALE = -3, 128 MODE_BAD = -2, 129 MODE_ERROR = -1 130 }; 131 132 #define DRM_MODE_TYPE_CLOCK_CRTC_C (DRM_MODE_TYPE_CLOCK_C | \ 133 DRM_MODE_TYPE_CRTC_C) 134 135 #define DRM_MODE(nm, t, c, hd, hss, hse, ht, hsk, vd, vss, vse, vt, vs, f) \ 136 .name = nm, .status = 0, .type = (t), .clock = (c), \ 137 .hdisplay = (hd), .hsync_start = (hss), .hsync_end = (hse), \ 138 .htotal = (ht), .hskew = (hsk), .vdisplay = (vd), \ 139 .vsync_start = (vss), .vsync_end = (vse), .vtotal = (vt), \ 140 .vscan = (vs), .flags = (f), \ 141 .base.type = DRM_MODE_OBJECT_MODE 142 143 #define CRTC_INTERLACE_HALVE_V (1 << 0) /* halve V values for interlacing */ 144 #define CRTC_STEREO_DOUBLE (1 << 1) /* adjust timings for stereo modes */ 145 #define CRTC_NO_DBLSCAN (1 << 2) /* don't adjust doublescan */ 146 #define CRTC_NO_VSCAN (1 << 3) /* don't adjust doublescan */ 147 #define CRTC_STEREO_DOUBLE_ONLY (CRTC_STEREO_DOUBLE | CRTC_NO_DBLSCAN | CRTC_NO_VSCAN) 148 149 #define DRM_MODE_FLAG_3D_MAX DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF 150 151 /** 152 * struct drm_display_mode - DRM kernel-internal display mode structure 153 * @hdisplay: horizontal display size 154 * @hsync_start: horizontal sync start 155 * @hsync_end: horizontal sync end 156 * @htotal: horizontal total size 157 * @hskew: horizontal skew?! 158 * @vdisplay: vertical display size 159 * @vsync_start: vertical sync start 160 * @vsync_end: vertical sync end 161 * @vtotal: vertical total size 162 * @vscan: vertical scan?! 163 * @crtc_hdisplay: hardware mode horizontal display size 164 * @crtc_hblank_start: hardware mode horizontal blank start 165 * @crtc_hblank_end: hardware mode horizontal blank end 166 * @crtc_hsync_start: hardware mode horizontal sync start 167 * @crtc_hsync_end: hardware mode horizontal sync end 168 * @crtc_htotal: hardware mode horizontal total size 169 * @crtc_hskew: hardware mode horizontal skew?! 170 * @crtc_vdisplay: hardware mode vertical display size 171 * @crtc_vblank_start: hardware mode vertical blank start 172 * @crtc_vblank_end: hardware mode vertical blank end 173 * @crtc_vsync_start: hardware mode vertical sync start 174 * @crtc_vsync_end: hardware mode vertical sync end 175 * @crtc_vtotal: hardware mode vertical total size 176 * 177 * The horizontal and vertical timings are defined per the following diagram. 178 * 179 * :: 180 * 181 * 182 * Active Front Sync Back 183 * Region Porch Porch 184 * <-----------------------><----------------><-------------><--------------> 185 * //////////////////////| 186 * ////////////////////// | 187 * ////////////////////// |.................. ................ 188 * _______________ 189 * <----- [hv]display -----> 190 * <------------- [hv]sync_start ------------> 191 * <--------------------- [hv]sync_end ---------------------> 192 * <-------------------------------- [hv]total ----------------------------->* 193 * 194 * This structure contains two copies of timings. First are the plain timings, 195 * which specify the logical mode, as it would be for a progressive 1:1 scanout 196 * at the refresh rate userspace can observe through vblank timestamps. Then 197 * there's the hardware timings, which are corrected for interlacing, 198 * double-clocking and similar things. They are provided as a convenience, and 199 * can be appropriately computed using drm_mode_set_crtcinfo(). 200 * 201 * For printing you can use %DRM_MODE_FMT and DRM_MODE_ARG(). 202 */ 203 struct drm_display_mode { 204 /** 205 * @head: 206 * 207 * struct list_head for mode lists. 208 */ 209 struct list_head head; 210 211 /** 212 * @base: 213 * 214 * A display mode is a normal modeset object, possibly including public 215 * userspace id. 216 * 217 * FIXME: 218 * 219 * This can probably be removed since the entire concept of userspace 220 * managing modes explicitly has never landed in upstream kernel mode 221 * setting support. 222 */ 223 struct drm_mode_object base; 224 225 /** 226 * @name: 227 * 228 * Human-readable name of the mode, filled out with drm_mode_set_name(). 229 */ 230 char name[DRM_DISPLAY_MODE_LEN]; 231 232 /** 233 * @status: 234 * 235 * Status of the mode, used to filter out modes not supported by the 236 * hardware. See enum &drm_mode_status. 237 */ 238 enum drm_mode_status status; 239 240 /** 241 * @type: 242 * 243 * A bitmask of flags, mostly about the source of a mode. Possible flags 244 * are: 245 * 246 * - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, effectively 247 * unused. 248 * - DRM_MODE_TYPE_PREFERRED: Preferred mode, usually the native 249 * resolution of an LCD panel. There should only be one preferred 250 * mode per connector at any given time. 251 * - DRM_MODE_TYPE_DRIVER: Mode created by the driver, which is all of 252 * them really. Drivers must set this bit for all modes they create 253 * and expose to userspace. 254 * 255 * Plus a big list of flags which shouldn't be used at all, but are 256 * still around since these flags are also used in the userspace ABI: 257 * 258 * - DRM_MODE_TYPE_DEFAULT: Again a leftover, use 259 * DRM_MODE_TYPE_PREFERRED instead. 260 * - DRM_MODE_TYPE_CLOCK_C and DRM_MODE_TYPE_CRTC_C: Define leftovers 261 * which are stuck around for hysterical raisins only. No one has an 262 * idea what they were meant for. Don't use. 263 * - DRM_MODE_TYPE_USERDEF: Mode defined by userspace, again a vestige 264 * from older kms designs where userspace had to first add a custom 265 * mode to the kernel's mode list before it could use it. Don't use. 266 */ 267 unsigned int type; 268 269 /** 270 * @clock: 271 * 272 * Pixel clock in kHz. 273 */ 274 int clock; /* in kHz */ 275 int hdisplay; 276 int hsync_start; 277 int hsync_end; 278 int htotal; 279 int hskew; 280 int vdisplay; 281 int vsync_start; 282 int vsync_end; 283 int vtotal; 284 int vscan; 285 /** 286 * @flags: 287 * 288 * Sync and timing flags: 289 * 290 * - DRM_MODE_FLAG_PHSYNC: horizontal sync is active high. 291 * - DRM_MODE_FLAG_NHSYNC: horizontal sync is active low. 292 * - DRM_MODE_FLAG_PVSYNC: vertical sync is active high. 293 * - DRM_MODE_FLAG_NVSYNC: vertical sync is active low. 294 * - DRM_MODE_FLAG_INTERLACE: mode is interlaced. 295 * - DRM_MODE_FLAG_DBLSCAN: mode uses doublescan. 296 * - DRM_MODE_FLAG_CSYNC: mode uses composite sync. 297 * - DRM_MODE_FLAG_PCSYNC: composite sync is active high. 298 * - DRM_MODE_FLAG_NCSYNC: composite sync is active low. 299 * - DRM_MODE_FLAG_HSKEW: hskew provided (not used?). 300 * - DRM_MODE_FLAG_BCAST: not used? 301 * - DRM_MODE_FLAG_PIXMUX: not used? 302 * - DRM_MODE_FLAG_DBLCLK: double-clocked mode. 303 * - DRM_MODE_FLAG_CLKDIV2: half-clocked mode. 304 * 305 * Additionally there's flags to specify how 3D modes are packed: 306 * 307 * - DRM_MODE_FLAG_3D_NONE: normal, non-3D mode. 308 * - DRM_MODE_FLAG_3D_FRAME_PACKING: 2 full frames for left and right. 309 * - DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE: interleaved like fields. 310 * - DRM_MODE_FLAG_3D_LINE_ALTERNATIVE: interleaved lines. 311 * - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL: side-by-side full frames. 312 * - DRM_MODE_FLAG_3D_L_DEPTH: ? 313 * - DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH: ? 314 * - DRM_MODE_FLAG_3D_TOP_AND_BOTTOM: frame split into top and bottom 315 * parts. 316 * - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF: frame split into left and 317 * right parts. 318 */ 319 unsigned int flags; 320 321 /** 322 * @width_mm: 323 * 324 * Addressable size of the output in mm, projectors should set this to 325 * 0. 326 */ 327 int width_mm; 328 329 /** 330 * @height_mm: 331 * 332 * Addressable size of the output in mm, projectors should set this to 333 * 0. 334 */ 335 int height_mm; 336 337 /** 338 * @crtc_clock: 339 * 340 * Actual pixel or dot clock in the hardware. This differs from the 341 * logical @clock when e.g. using interlacing, double-clocking, stereo 342 * modes or other fancy stuff that changes the timings and signals 343 * actually sent over the wire. 344 * 345 * This is again in kHz. 346 * 347 * Note that with digital outputs like HDMI or DP there's usually a 348 * massive confusion between the dot clock and the signal clock at the 349 * bit encoding level. Especially when a 8b/10b encoding is used and the 350 * difference is exactly a factor of 10. 351 */ 352 int crtc_clock; 353 int crtc_hdisplay; 354 int crtc_hblank_start; 355 int crtc_hblank_end; 356 int crtc_hsync_start; 357 int crtc_hsync_end; 358 int crtc_htotal; 359 int crtc_hskew; 360 int crtc_vdisplay; 361 int crtc_vblank_start; 362 int crtc_vblank_end; 363 int crtc_vsync_start; 364 int crtc_vsync_end; 365 int crtc_vtotal; 366 367 /** 368 * @private: 369 * 370 * Pointer for driver private data. This can only be used for mode 371 * objects passed to drivers in modeset operations. It shouldn't be used 372 * by atomic drivers since they can store any additional data by 373 * subclassing state structures. 374 */ 375 int *private; 376 377 /** 378 * @private_flags: 379 * 380 * Similar to @private, but just an integer. 381 */ 382 int private_flags; 383 384 /** 385 * @vrefresh: 386 * 387 * Vertical refresh rate, for debug output in human readable form. Not 388 * used in a functional way. 389 * 390 * This value is in Hz. 391 */ 392 int vrefresh; 393 394 /** 395 * @hsync: 396 * 397 * Horizontal refresh rate, for debug output in human readable form. Not 398 * used in a functional way. 399 * 400 * This value is in kHz. 401 */ 402 int hsync; 403 404 /** 405 * @picture_aspect_ratio: 406 * 407 * Field for setting the HDMI picture aspect ratio of a mode. 408 */ 409 enum hdmi_picture_aspect picture_aspect_ratio; 410 }; 411 412 /** 413 * DRM_MODE_FMT - printf string for &struct drm_display_mode 414 */ 415 #define DRM_MODE_FMT "%d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x" 416 417 /** 418 * DRM_MODE_ARG - printf arguments for &struct drm_display_mode 419 * @m: display mode 420 */ 421 #define DRM_MODE_ARG(m) \ 422 (m)->base.id, (m)->name, (m)->vrefresh, (m)->clock, \ 423 (m)->hdisplay, (m)->hsync_start, (m)->hsync_end, (m)->htotal, \ 424 (m)->vdisplay, (m)->vsync_start, (m)->vsync_end, (m)->vtotal, \ 425 (m)->type, (m)->flags 426 427 #define obj_to_mode(x) container_of(x, struct drm_display_mode, base) 428 429 /** 430 * drm_mode_is_stereo - check for stereo mode flags 431 * @mode: drm_display_mode to check 432 * 433 * Returns: 434 * True if the mode is one of the stereo modes (like side-by-side), false if 435 * not. 436 */ 437 static inline bool drm_mode_is_stereo(const struct drm_display_mode *mode) 438 { 439 return mode->flags & DRM_MODE_FLAG_3D_MASK; 440 } 441 442 struct drm_connector; 443 struct drm_cmdline_mode; 444 445 struct drm_display_mode *drm_mode_create(struct drm_device *dev); 446 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode); 447 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 448 const struct drm_display_mode *in); 449 int drm_mode_convert_umode(struct drm_display_mode *out, 450 const struct drm_mode_modeinfo *in); 451 void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode); 452 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode); 453 454 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, 455 int hdisplay, int vdisplay, int vrefresh, 456 bool reduced, bool interlaced, 457 bool margins); 458 struct drm_display_mode *drm_gtf_mode(struct drm_device *dev, 459 int hdisplay, int vdisplay, int vrefresh, 460 bool interlaced, int margins); 461 struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev, 462 int hdisplay, int vdisplay, 463 int vrefresh, bool interlaced, 464 int margins, 465 int GTF_M, int GTF_2C, 466 int GTF_K, int GTF_2J); 467 void drm_display_mode_from_videomode(const struct videomode *vm, 468 struct drm_display_mode *dmode); 469 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 470 struct videomode *vm); 471 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags); 472 int of_get_drm_display_mode(struct device_node *np, 473 struct drm_display_mode *dmode, u32 *bus_flags, 474 int index); 475 476 void drm_mode_set_name(struct drm_display_mode *mode); 477 int drm_mode_hsync(const struct drm_display_mode *mode); 478 int drm_mode_vrefresh(const struct drm_display_mode *mode); 479 void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 480 int *hdisplay, int *vdisplay); 481 482 void drm_mode_set_crtcinfo(struct drm_display_mode *p, 483 int adjust_flags); 484 void drm_mode_copy(struct drm_display_mode *dst, 485 const struct drm_display_mode *src); 486 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 487 const struct drm_display_mode *mode); 488 bool drm_mode_equal(const struct drm_display_mode *mode1, 489 const struct drm_display_mode *mode2); 490 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, 491 const struct drm_display_mode *mode2); 492 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 493 const struct drm_display_mode *mode2); 494 495 /* for use by the crtc helper probe functions */ 496 enum drm_mode_status drm_mode_validate_basic(const struct drm_display_mode *mode); 497 enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode, 498 int maxX, int maxY); 499 void drm_mode_prune_invalid(struct drm_device *dev, 500 struct list_head *mode_list, bool verbose); 501 void drm_mode_sort(struct list_head *mode_list); 502 void drm_mode_connector_list_update(struct drm_connector *connector); 503 504 /* parsing cmdline modes */ 505 bool 506 drm_mode_parse_command_line_for_connector(const char *mode_option, 507 struct drm_connector *connector, 508 struct drm_cmdline_mode *mode); 509 struct drm_display_mode * 510 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 511 struct drm_cmdline_mode *cmd); 512 513 #endif /* __DRM_MODES_H__ */ 514