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 #if 0 455 void drm_display_mode_from_videomode(const struct videomode *vm, 456 struct drm_display_mode *dmode); 457 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 458 struct videomode *vm); 459 int of_get_drm_display_mode(struct device_node *np, 460 struct drm_display_mode *dmode, 461 int index); 462 #endif 463 464 void drm_mode_set_name(struct drm_display_mode *mode); 465 int drm_mode_hsync(const struct drm_display_mode *mode); 466 int drm_mode_vrefresh(const struct drm_display_mode *mode); 467 468 void drm_mode_set_crtcinfo(struct drm_display_mode *p, 469 int adjust_flags); 470 void drm_mode_copy(struct drm_display_mode *dst, 471 const struct drm_display_mode *src); 472 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 473 const struct drm_display_mode *mode); 474 bool drm_mode_equal(const struct drm_display_mode *mode1, 475 const struct drm_display_mode *mode2); 476 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, 477 const struct drm_display_mode *mode2); 478 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 479 const struct drm_display_mode *mode2); 480 481 /* for use by the crtc helper probe functions */ 482 enum drm_mode_status drm_mode_validate_basic(const struct drm_display_mode *mode); 483 enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode, 484 int maxX, int maxY); 485 void drm_mode_prune_invalid(struct drm_device *dev, 486 struct list_head *mode_list, bool verbose); 487 void drm_mode_sort(struct list_head *mode_list); 488 void drm_mode_connector_list_update(struct drm_connector *connector); 489 490 /* parsing cmdline modes */ 491 bool 492 drm_mode_parse_command_line_for_connector(const char *mode_option, 493 struct drm_connector *connector, 494 struct drm_cmdline_mode *mode); 495 struct drm_display_mode * 496 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 497 struct drm_cmdline_mode *cmd); 498 499 #endif /* __DRM_MODES_H__ */ 500