1 /* 2 * Copyright © 1997-2003 by The XFree86 Project, Inc. 3 * Copyright © 2007 Dave Airlie 4 * Copyright © 2007-2008 Intel Corporation 5 * Jesse Barnes <jesse.barnes@intel.com> 6 * Copyright 2005-2006 Luc Verhaegen 7 * Copyright (c) 2001, Andy Ritger aritger@nvidia.com 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 * Except as contained in this notice, the name of the copyright holder(s) 28 * and author(s) shall not be used in advertising or otherwise to promote 29 * the sale, use or other dealings in this Software without prior written 30 * authorization from the copyright holder(s) and author(s). 31 */ 32 33 #include <linux/ctype.h> 34 #include <linux/export.h> 35 #include <linux/fb.h> /* for KHZ2PICOS() */ 36 #include <linux/list.h> 37 #include <linux/list_sort.h> 38 #include <linux/of.h> 39 40 #include <video/of_display_timing.h> 41 #include <video/of_videomode.h> 42 #include <video/videomode.h> 43 44 #include <drm/drm_crtc.h> 45 #include <drm/drm_device.h> 46 #include <drm/drm_edid.h> 47 #include <drm/drm_modes.h> 48 #include <drm/drm_print.h> 49 50 #include "drm_crtc_internal.h" 51 52 /** 53 * drm_mode_debug_printmodeline - print a mode to dmesg 54 * @mode: mode to print 55 * 56 * Describe @mode using DRM_DEBUG. 57 */ 58 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) 59 { 60 DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 61 } 62 EXPORT_SYMBOL(drm_mode_debug_printmodeline); 63 64 /** 65 * drm_mode_create - create a new display mode 66 * @dev: DRM device 67 * 68 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it 69 * and return it. 70 * 71 * Returns: 72 * Pointer to new mode on success, NULL on error. 73 */ 74 struct drm_display_mode *drm_mode_create(struct drm_device *dev) 75 { 76 struct drm_display_mode *nmode; 77 78 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); 79 if (!nmode) 80 return NULL; 81 82 return nmode; 83 } 84 EXPORT_SYMBOL(drm_mode_create); 85 86 /** 87 * drm_mode_destroy - remove a mode 88 * @dev: DRM device 89 * @mode: mode to remove 90 * 91 * Release @mode's unique ID, then free it @mode structure itself using kfree. 92 */ 93 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) 94 { 95 if (!mode) 96 return; 97 98 kfree(mode); 99 } 100 EXPORT_SYMBOL(drm_mode_destroy); 101 102 /** 103 * drm_mode_probed_add - add a mode to a connector's probed_mode list 104 * @connector: connector the new mode 105 * @mode: mode data 106 * 107 * Add @mode to @connector's probed_mode list for later use. This list should 108 * then in a second step get filtered and all the modes actually supported by 109 * the hardware moved to the @connector's modes list. 110 */ 111 void drm_mode_probed_add(struct drm_connector *connector, 112 struct drm_display_mode *mode) 113 { 114 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 115 116 list_add_tail(&mode->head, &connector->probed_modes); 117 } 118 EXPORT_SYMBOL(drm_mode_probed_add); 119 120 enum drm_mode_analog { 121 DRM_MODE_ANALOG_NTSC, /* 525 lines, 60Hz */ 122 DRM_MODE_ANALOG_PAL, /* 625 lines, 50Hz */ 123 }; 124 125 /* 126 * The timings come from: 127 * - https://web.archive.org/web/20220406232708/http://www.kolumbus.fi/pami1/video/pal_ntsc.html 128 * - https://web.archive.org/web/20220406124914/http://martin.hinner.info/vga/pal.html 129 * - https://web.archive.org/web/20220609202433/http://www.batsocks.co.uk/readme/video_timing.htm 130 */ 131 #define NTSC_LINE_DURATION_NS 63556U 132 #define NTSC_LINES_NUMBER 525 133 134 #define NTSC_HBLK_DURATION_TYP_NS 10900U 135 #define NTSC_HBLK_DURATION_MIN_NS (NTSC_HBLK_DURATION_TYP_NS - 200) 136 #define NTSC_HBLK_DURATION_MAX_NS (NTSC_HBLK_DURATION_TYP_NS + 200) 137 138 #define NTSC_HACT_DURATION_TYP_NS (NTSC_LINE_DURATION_NS - NTSC_HBLK_DURATION_TYP_NS) 139 #define NTSC_HACT_DURATION_MIN_NS (NTSC_LINE_DURATION_NS - NTSC_HBLK_DURATION_MAX_NS) 140 #define NTSC_HACT_DURATION_MAX_NS (NTSC_LINE_DURATION_NS - NTSC_HBLK_DURATION_MIN_NS) 141 142 #define NTSC_HFP_DURATION_TYP_NS 1500 143 #define NTSC_HFP_DURATION_MIN_NS 1270 144 #define NTSC_HFP_DURATION_MAX_NS 2220 145 146 #define NTSC_HSLEN_DURATION_TYP_NS 4700 147 #define NTSC_HSLEN_DURATION_MIN_NS (NTSC_HSLEN_DURATION_TYP_NS - 100) 148 #define NTSC_HSLEN_DURATION_MAX_NS (NTSC_HSLEN_DURATION_TYP_NS + 100) 149 150 #define NTSC_HBP_DURATION_TYP_NS 4700 151 152 /* 153 * I couldn't find the actual tolerance for the back porch, so let's 154 * just reuse the sync length ones. 155 */ 156 #define NTSC_HBP_DURATION_MIN_NS (NTSC_HBP_DURATION_TYP_NS - 100) 157 #define NTSC_HBP_DURATION_MAX_NS (NTSC_HBP_DURATION_TYP_NS + 100) 158 159 #define PAL_LINE_DURATION_NS 64000U 160 #define PAL_LINES_NUMBER 625 161 162 #define PAL_HACT_DURATION_TYP_NS 51950U 163 #define PAL_HACT_DURATION_MIN_NS (PAL_HACT_DURATION_TYP_NS - 100) 164 #define PAL_HACT_DURATION_MAX_NS (PAL_HACT_DURATION_TYP_NS + 400) 165 166 #define PAL_HBLK_DURATION_TYP_NS (PAL_LINE_DURATION_NS - PAL_HACT_DURATION_TYP_NS) 167 #define PAL_HBLK_DURATION_MIN_NS (PAL_LINE_DURATION_NS - PAL_HACT_DURATION_MAX_NS) 168 #define PAL_HBLK_DURATION_MAX_NS (PAL_LINE_DURATION_NS - PAL_HACT_DURATION_MIN_NS) 169 170 #define PAL_HFP_DURATION_TYP_NS 1650 171 #define PAL_HFP_DURATION_MIN_NS (PAL_HFP_DURATION_TYP_NS - 100) 172 #define PAL_HFP_DURATION_MAX_NS (PAL_HFP_DURATION_TYP_NS + 400) 173 174 #define PAL_HSLEN_DURATION_TYP_NS 4700 175 #define PAL_HSLEN_DURATION_MIN_NS (PAL_HSLEN_DURATION_TYP_NS - 200) 176 #define PAL_HSLEN_DURATION_MAX_NS (PAL_HSLEN_DURATION_TYP_NS + 200) 177 178 #define PAL_HBP_DURATION_TYP_NS 5700 179 #define PAL_HBP_DURATION_MIN_NS (PAL_HBP_DURATION_TYP_NS - 200) 180 #define PAL_HBP_DURATION_MAX_NS (PAL_HBP_DURATION_TYP_NS + 200) 181 182 struct analog_param_field { 183 unsigned int even, odd; 184 }; 185 186 #define PARAM_FIELD(_odd, _even) \ 187 { .even = _even, .odd = _odd } 188 189 struct analog_param_range { 190 unsigned int min, typ, max; 191 }; 192 193 #define PARAM_RANGE(_min, _typ, _max) \ 194 { .min = _min, .typ = _typ, .max = _max } 195 196 struct analog_parameters { 197 unsigned int num_lines; 198 unsigned int line_duration_ns; 199 200 struct analog_param_range hact_ns; 201 struct analog_param_range hfp_ns; 202 struct analog_param_range hslen_ns; 203 struct analog_param_range hbp_ns; 204 struct analog_param_range hblk_ns; 205 206 unsigned int bt601_hfp; 207 208 struct analog_param_field vfp_lines; 209 struct analog_param_field vslen_lines; 210 struct analog_param_field vbp_lines; 211 }; 212 213 #define TV_MODE_PARAMETER(_mode, _lines, _line_dur, _hact, _hfp, \ 214 _hslen, _hbp, _hblk, _bt601_hfp, _vfp, \ 215 _vslen, _vbp) \ 216 [_mode] = { \ 217 .num_lines = _lines, \ 218 .line_duration_ns = _line_dur, \ 219 .hact_ns = _hact, \ 220 .hfp_ns = _hfp, \ 221 .hslen_ns = _hslen, \ 222 .hbp_ns = _hbp, \ 223 .hblk_ns = _hblk, \ 224 .bt601_hfp = _bt601_hfp, \ 225 .vfp_lines = _vfp, \ 226 .vslen_lines = _vslen, \ 227 .vbp_lines = _vbp, \ 228 } 229 230 static const struct analog_parameters tv_modes_parameters[] = { 231 TV_MODE_PARAMETER(DRM_MODE_ANALOG_NTSC, 232 NTSC_LINES_NUMBER, 233 NTSC_LINE_DURATION_NS, 234 PARAM_RANGE(NTSC_HACT_DURATION_MIN_NS, 235 NTSC_HACT_DURATION_TYP_NS, 236 NTSC_HACT_DURATION_MAX_NS), 237 PARAM_RANGE(NTSC_HFP_DURATION_MIN_NS, 238 NTSC_HFP_DURATION_TYP_NS, 239 NTSC_HFP_DURATION_MAX_NS), 240 PARAM_RANGE(NTSC_HSLEN_DURATION_MIN_NS, 241 NTSC_HSLEN_DURATION_TYP_NS, 242 NTSC_HSLEN_DURATION_MAX_NS), 243 PARAM_RANGE(NTSC_HBP_DURATION_MIN_NS, 244 NTSC_HBP_DURATION_TYP_NS, 245 NTSC_HBP_DURATION_MAX_NS), 246 PARAM_RANGE(NTSC_HBLK_DURATION_MIN_NS, 247 NTSC_HBLK_DURATION_TYP_NS, 248 NTSC_HBLK_DURATION_MAX_NS), 249 16, 250 PARAM_FIELD(3, 3), 251 PARAM_FIELD(3, 3), 252 PARAM_FIELD(16, 17)), 253 TV_MODE_PARAMETER(DRM_MODE_ANALOG_PAL, 254 PAL_LINES_NUMBER, 255 PAL_LINE_DURATION_NS, 256 PARAM_RANGE(PAL_HACT_DURATION_MIN_NS, 257 PAL_HACT_DURATION_TYP_NS, 258 PAL_HACT_DURATION_MAX_NS), 259 PARAM_RANGE(PAL_HFP_DURATION_MIN_NS, 260 PAL_HFP_DURATION_TYP_NS, 261 PAL_HFP_DURATION_MAX_NS), 262 PARAM_RANGE(PAL_HSLEN_DURATION_MIN_NS, 263 PAL_HSLEN_DURATION_TYP_NS, 264 PAL_HSLEN_DURATION_MAX_NS), 265 PARAM_RANGE(PAL_HBP_DURATION_MIN_NS, 266 PAL_HBP_DURATION_TYP_NS, 267 PAL_HBP_DURATION_MAX_NS), 268 PARAM_RANGE(PAL_HBLK_DURATION_MIN_NS, 269 PAL_HBLK_DURATION_TYP_NS, 270 PAL_HBLK_DURATION_MAX_NS), 271 12, 272 273 /* 274 * The front porch is actually 6 short sync 275 * pulses for the even field, and 5 for the 276 * odd field. Each sync takes half a life so 277 * the odd field front porch is shorter by 278 * half a line. 279 * 280 * In progressive, we're supposed to use 6 281 * pulses, so we're fine there 282 */ 283 PARAM_FIELD(3, 2), 284 285 /* 286 * The vsync length is 5 long sync pulses, 287 * each field taking half a line. We're 288 * shorter for both fields by half a line. 289 * 290 * In progressive, we're supposed to use 5 291 * pulses, so we're off by half 292 * a line. 293 * 294 * In interlace, we're now off by half a line 295 * for the even field and one line for the odd 296 * field. 297 */ 298 PARAM_FIELD(3, 3), 299 300 /* 301 * The back porch starts with post-equalizing 302 * pulses, consisting in 5 short sync pulses 303 * for the even field, 4 for the odd field. In 304 * progressive, it's 5 short syncs. 305 * 306 * In progressive, we thus have 2.5 lines, 307 * plus the 0.5 line we were missing 308 * previously, so we should use 3 lines. 309 * 310 * In interlace, the even field is in the 311 * exact same case than progressive. For the 312 * odd field, we should be using 2 lines but 313 * we're one line short, so we'll make up for 314 * it here by using 3. 315 * 316 * The entire blanking area is supposed to 317 * take 25 lines, so we also need to account 318 * for the rest of the blanking area that 319 * can't be in either the front porch or sync 320 * period. 321 */ 322 PARAM_FIELD(19, 20)), 323 }; 324 325 static int fill_analog_mode(struct drm_device *dev, 326 struct drm_display_mode *mode, 327 const struct analog_parameters *params, 328 unsigned long pixel_clock_hz, 329 unsigned int hactive, 330 unsigned int vactive, 331 bool interlace) 332 { 333 unsigned long pixel_duration_ns = NSEC_PER_SEC / pixel_clock_hz; 334 unsigned int htotal, vtotal; 335 unsigned int max_hact, hact_duration_ns; 336 unsigned int hblk, hblk_duration_ns; 337 unsigned int hfp, hfp_duration_ns; 338 unsigned int hslen, hslen_duration_ns; 339 unsigned int hbp, hbp_duration_ns; 340 unsigned int porches, porches_duration_ns; 341 unsigned int vfp, vfp_min; 342 unsigned int vbp, vbp_min; 343 unsigned int vslen; 344 bool bt601 = false; 345 int porches_rem; 346 u64 result; 347 348 drm_dbg_kms(dev, 349 "Generating a %ux%u%c, %u-line mode with a %lu kHz clock\n", 350 hactive, vactive, 351 interlace ? 'i' : 'p', 352 params->num_lines, 353 pixel_clock_hz / 1000); 354 355 max_hact = params->hact_ns.max / pixel_duration_ns; 356 if (pixel_clock_hz == 13500000 && hactive > max_hact && hactive <= 720) { 357 drm_dbg_kms(dev, "Trying to generate a BT.601 mode. Disabling checks.\n"); 358 bt601 = true; 359 } 360 361 /* 362 * Our pixel duration is going to be round down by the division, 363 * so rounding up is probably going to introduce even more 364 * deviation. 365 */ 366 result = (u64)params->line_duration_ns * pixel_clock_hz; 367 do_div(result, NSEC_PER_SEC); 368 htotal = result; 369 370 drm_dbg_kms(dev, "Total Horizontal Number of Pixels: %u\n", htotal); 371 372 hact_duration_ns = hactive * pixel_duration_ns; 373 if (!bt601 && 374 (hact_duration_ns < params->hact_ns.min || 375 hact_duration_ns > params->hact_ns.max)) { 376 drm_err(dev, "Invalid horizontal active area duration: %uns (min: %u, max %u)\n", 377 hact_duration_ns, params->hact_ns.min, params->hact_ns.max); 378 return -EINVAL; 379 } 380 381 hblk = htotal - hactive; 382 drm_dbg_kms(dev, "Horizontal Blanking Period: %u\n", hblk); 383 384 hblk_duration_ns = hblk * pixel_duration_ns; 385 if (!bt601 && 386 (hblk_duration_ns < params->hblk_ns.min || 387 hblk_duration_ns > params->hblk_ns.max)) { 388 drm_err(dev, "Invalid horizontal blanking duration: %uns (min: %u, max %u)\n", 389 hblk_duration_ns, params->hblk_ns.min, params->hblk_ns.max); 390 return -EINVAL; 391 } 392 393 hslen = DIV_ROUND_UP(params->hslen_ns.typ, pixel_duration_ns); 394 drm_dbg_kms(dev, "Horizontal Sync Period: %u\n", hslen); 395 396 hslen_duration_ns = hslen * pixel_duration_ns; 397 if (!bt601 && 398 (hslen_duration_ns < params->hslen_ns.min || 399 hslen_duration_ns > params->hslen_ns.max)) { 400 drm_err(dev, "Invalid horizontal sync duration: %uns (min: %u, max %u)\n", 401 hslen_duration_ns, params->hslen_ns.min, params->hslen_ns.max); 402 return -EINVAL; 403 } 404 405 porches = hblk - hslen; 406 drm_dbg_kms(dev, "Remaining horizontal pixels for both porches: %u\n", porches); 407 408 porches_duration_ns = porches * pixel_duration_ns; 409 if (!bt601 && 410 (porches_duration_ns > (params->hfp_ns.max + params->hbp_ns.max) || 411 porches_duration_ns < (params->hfp_ns.min + params->hbp_ns.min))) { 412 drm_err(dev, "Invalid horizontal porches duration: %uns\n", 413 porches_duration_ns); 414 return -EINVAL; 415 } 416 417 if (bt601) { 418 hfp = params->bt601_hfp; 419 } else { 420 unsigned int hfp_min = DIV_ROUND_UP(params->hfp_ns.min, 421 pixel_duration_ns); 422 unsigned int hbp_min = DIV_ROUND_UP(params->hbp_ns.min, 423 pixel_duration_ns); 424 int porches_rem = porches - hfp_min - hbp_min; 425 426 hfp = hfp_min + DIV_ROUND_UP(porches_rem, 2); 427 } 428 429 drm_dbg_kms(dev, "Horizontal Front Porch: %u\n", hfp); 430 431 hfp_duration_ns = hfp * pixel_duration_ns; 432 if (!bt601 && 433 (hfp_duration_ns < params->hfp_ns.min || 434 hfp_duration_ns > params->hfp_ns.max)) { 435 drm_err(dev, "Invalid horizontal front porch duration: %uns (min: %u, max %u)\n", 436 hfp_duration_ns, params->hfp_ns.min, params->hfp_ns.max); 437 return -EINVAL; 438 } 439 440 hbp = porches - hfp; 441 drm_dbg_kms(dev, "Horizontal Back Porch: %u\n", hbp); 442 443 hbp_duration_ns = hbp * pixel_duration_ns; 444 if (!bt601 && 445 (hbp_duration_ns < params->hbp_ns.min || 446 hbp_duration_ns > params->hbp_ns.max)) { 447 drm_err(dev, "Invalid horizontal back porch duration: %uns (min: %u, max %u)\n", 448 hbp_duration_ns, params->hbp_ns.min, params->hbp_ns.max); 449 return -EINVAL; 450 } 451 452 if (htotal != (hactive + hfp + hslen + hbp)) 453 return -EINVAL; 454 455 mode->clock = pixel_clock_hz / 1000; 456 mode->hdisplay = hactive; 457 mode->hsync_start = mode->hdisplay + hfp; 458 mode->hsync_end = mode->hsync_start + hslen; 459 mode->htotal = mode->hsync_end + hbp; 460 461 if (interlace) { 462 vfp_min = params->vfp_lines.even + params->vfp_lines.odd; 463 vbp_min = params->vbp_lines.even + params->vbp_lines.odd; 464 vslen = params->vslen_lines.even + params->vslen_lines.odd; 465 } else { 466 /* 467 * By convention, NTSC (aka 525/60) systems start with 468 * the even field, but PAL (aka 625/50) systems start 469 * with the odd one. 470 * 471 * PAL systems also have asymmetric timings between the 472 * even and odd field, while NTSC is symmetric. 473 * 474 * Moreover, if we want to create a progressive mode for 475 * PAL, we need to use the odd field timings. 476 * 477 * Since odd == even for NTSC, we can just use the odd 478 * one all the time to simplify the code a bit. 479 */ 480 vfp_min = params->vfp_lines.odd; 481 vbp_min = params->vbp_lines.odd; 482 vslen = params->vslen_lines.odd; 483 } 484 485 drm_dbg_kms(dev, "Vertical Sync Period: %u\n", vslen); 486 487 porches = params->num_lines - vactive - vslen; 488 drm_dbg_kms(dev, "Remaining vertical pixels for both porches: %u\n", porches); 489 490 porches_rem = porches - vfp_min - vbp_min; 491 vfp = vfp_min + (porches_rem / 2); 492 drm_dbg_kms(dev, "Vertical Front Porch: %u\n", vfp); 493 494 vbp = porches - vfp; 495 drm_dbg_kms(dev, "Vertical Back Porch: %u\n", vbp); 496 497 vtotal = vactive + vfp + vslen + vbp; 498 if (params->num_lines != vtotal) { 499 drm_err(dev, "Invalid vertical total: %upx (expected %upx)\n", 500 vtotal, params->num_lines); 501 return -EINVAL; 502 } 503 504 mode->vdisplay = vactive; 505 mode->vsync_start = mode->vdisplay + vfp; 506 mode->vsync_end = mode->vsync_start + vslen; 507 mode->vtotal = mode->vsync_end + vbp; 508 509 if (mode->vtotal != params->num_lines) 510 return -EINVAL; 511 512 mode->type = DRM_MODE_TYPE_DRIVER; 513 mode->flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC; 514 if (interlace) 515 mode->flags |= DRM_MODE_FLAG_INTERLACE; 516 517 drm_mode_set_name(mode); 518 519 drm_dbg_kms(dev, "Generated mode " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 520 521 return 0; 522 } 523 524 /** 525 * drm_analog_tv_mode - create a display mode for an analog TV 526 * @dev: drm device 527 * @tv_mode: TV Mode standard to create a mode for. See DRM_MODE_TV_MODE_*. 528 * @pixel_clock_hz: Pixel Clock Frequency, in Hertz 529 * @hdisplay: hdisplay size 530 * @vdisplay: vdisplay size 531 * @interlace: whether to compute an interlaced mode 532 * 533 * This function creates a struct drm_display_mode instance suited for 534 * an analog TV output, for one of the usual analog TV modes. Where 535 * this is DRM_MODE_TV_MODE_MONOCHROME, a 625-line mode will be created. 536 * 537 * Note that @hdisplay is larger than the usual constraints for the PAL 538 * and NTSC timings, and we'll choose to ignore most timings constraints 539 * to reach those resolutions. 540 * 541 * Returns: 542 * 543 * A pointer to the mode, allocated with drm_mode_create(). Returns NULL 544 * on error. 545 */ 546 struct drm_display_mode *drm_analog_tv_mode(struct drm_device *dev, 547 enum drm_connector_tv_mode tv_mode, 548 unsigned long pixel_clock_hz, 549 unsigned int hdisplay, 550 unsigned int vdisplay, 551 bool interlace) 552 { 553 struct drm_display_mode *mode; 554 enum drm_mode_analog analog; 555 int ret; 556 557 switch (tv_mode) { 558 case DRM_MODE_TV_MODE_NTSC: 559 fallthrough; 560 case DRM_MODE_TV_MODE_NTSC_443: 561 fallthrough; 562 case DRM_MODE_TV_MODE_NTSC_J: 563 fallthrough; 564 case DRM_MODE_TV_MODE_PAL_M: 565 analog = DRM_MODE_ANALOG_NTSC; 566 break; 567 568 case DRM_MODE_TV_MODE_PAL: 569 fallthrough; 570 case DRM_MODE_TV_MODE_PAL_N: 571 fallthrough; 572 case DRM_MODE_TV_MODE_SECAM: 573 fallthrough; 574 case DRM_MODE_TV_MODE_MONOCHROME: 575 analog = DRM_MODE_ANALOG_PAL; 576 break; 577 578 default: 579 return NULL; 580 } 581 582 mode = drm_mode_create(dev); 583 if (!mode) 584 return NULL; 585 586 ret = fill_analog_mode(dev, mode, 587 &tv_modes_parameters[analog], 588 pixel_clock_hz, hdisplay, vdisplay, interlace); 589 if (ret) 590 goto err_free_mode; 591 592 return mode; 593 594 err_free_mode: 595 drm_mode_destroy(dev, mode); 596 return NULL; 597 } 598 EXPORT_SYMBOL(drm_analog_tv_mode); 599 600 /** 601 * drm_cvt_mode -create a modeline based on the CVT algorithm 602 * @dev: drm device 603 * @hdisplay: hdisplay size 604 * @vdisplay: vdisplay size 605 * @vrefresh: vrefresh rate 606 * @reduced: whether to use reduced blanking 607 * @interlaced: whether to compute an interlaced mode 608 * @margins: whether to add margins (borders) 609 * 610 * This function is called to generate the modeline based on CVT algorithm 611 * according to the hdisplay, vdisplay, vrefresh. 612 * It is based from the VESA(TM) Coordinated Video Timing Generator by 613 * Graham Loveridge April 9, 2003 available at 614 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 615 * 616 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 617 * What I have done is to translate it by using integer calculation. 618 * 619 * Returns: 620 * The modeline based on the CVT algorithm stored in a drm_display_mode object. 621 * The display mode object is allocated with drm_mode_create(). Returns NULL 622 * when no mode could be allocated. 623 */ 624 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 625 int vdisplay, int vrefresh, 626 bool reduced, bool interlaced, bool margins) 627 { 628 #define HV_FACTOR 1000 629 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 630 #define CVT_MARGIN_PERCENTAGE 18 631 /* 2) character cell horizontal granularity (pixels) - default 8 */ 632 #define CVT_H_GRANULARITY 8 633 /* 3) Minimum vertical porch (lines) - default 3 */ 634 #define CVT_MIN_V_PORCH 3 635 /* 4) Minimum number of vertical back porch lines - default 6 */ 636 #define CVT_MIN_V_BPORCH 6 637 /* Pixel Clock step (kHz) */ 638 #define CVT_CLOCK_STEP 250 639 struct drm_display_mode *drm_mode; 640 unsigned int vfieldrate, hperiod; 641 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 642 int interlace; 643 u64 tmp; 644 645 if (!hdisplay || !vdisplay) 646 return NULL; 647 648 /* allocate the drm_display_mode structure. If failure, we will 649 * return directly 650 */ 651 drm_mode = drm_mode_create(dev); 652 if (!drm_mode) 653 return NULL; 654 655 /* the CVT default refresh rate is 60Hz */ 656 if (!vrefresh) 657 vrefresh = 60; 658 659 /* the required field fresh rate */ 660 if (interlaced) 661 vfieldrate = vrefresh * 2; 662 else 663 vfieldrate = vrefresh; 664 665 /* horizontal pixels */ 666 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 667 668 /* determine the left&right borders */ 669 hmargin = 0; 670 if (margins) { 671 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 672 hmargin -= hmargin % CVT_H_GRANULARITY; 673 } 674 /* find the total active pixels */ 675 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 676 677 /* find the number of lines per field */ 678 if (interlaced) 679 vdisplay_rnd = vdisplay / 2; 680 else 681 vdisplay_rnd = vdisplay; 682 683 /* find the top & bottom borders */ 684 vmargin = 0; 685 if (margins) 686 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 687 688 drm_mode->vdisplay = vdisplay + 2 * vmargin; 689 690 /* Interlaced */ 691 if (interlaced) 692 interlace = 1; 693 else 694 interlace = 0; 695 696 /* Determine VSync Width from aspect ratio */ 697 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 698 vsync = 4; 699 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 700 vsync = 5; 701 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 702 vsync = 6; 703 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 704 vsync = 7; 705 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 706 vsync = 7; 707 else /* custom */ 708 vsync = 10; 709 710 if (!reduced) { 711 /* simplify the GTF calculation */ 712 /* 4) Minimum time of vertical sync + back porch interval (µs) 713 * default 550.0 714 */ 715 int tmp1, tmp2; 716 #define CVT_MIN_VSYNC_BP 550 717 /* 3) Nominal HSync width (% of line period) - default 8 */ 718 #define CVT_HSYNC_PERCENTAGE 8 719 unsigned int hblank_percentage; 720 int vsyncandback_porch, __maybe_unused vback_porch, hblank; 721 722 /* estimated the horizontal period */ 723 tmp1 = HV_FACTOR * 1000000 - 724 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 725 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 726 interlace; 727 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 728 729 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 730 /* 9. Find number of lines in sync + backporch */ 731 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 732 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 733 else 734 vsyncandback_porch = tmp1; 735 /* 10. Find number of lines in back porch */ 736 vback_porch = vsyncandback_porch - vsync; 737 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 738 vsyncandback_porch + CVT_MIN_V_PORCH; 739 /* 5) Definition of Horizontal blanking time limitation */ 740 /* Gradient (%/kHz) - default 600 */ 741 #define CVT_M_FACTOR 600 742 /* Offset (%) - default 40 */ 743 #define CVT_C_FACTOR 40 744 /* Blanking time scaling factor - default 128 */ 745 #define CVT_K_FACTOR 128 746 /* Scaling factor weighting - default 20 */ 747 #define CVT_J_FACTOR 20 748 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 749 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 750 CVT_J_FACTOR) 751 /* 12. Find ideal blanking duty cycle from formula */ 752 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 753 hperiod / 1000; 754 /* 13. Blanking time */ 755 if (hblank_percentage < 20 * HV_FACTOR) 756 hblank_percentage = 20 * HV_FACTOR; 757 hblank = drm_mode->hdisplay * hblank_percentage / 758 (100 * HV_FACTOR - hblank_percentage); 759 hblank -= hblank % (2 * CVT_H_GRANULARITY); 760 /* 14. find the total pixels per line */ 761 drm_mode->htotal = drm_mode->hdisplay + hblank; 762 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 763 drm_mode->hsync_start = drm_mode->hsync_end - 764 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 765 drm_mode->hsync_start += CVT_H_GRANULARITY - 766 drm_mode->hsync_start % CVT_H_GRANULARITY; 767 /* fill the Vsync values */ 768 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 769 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 770 } else { 771 /* Reduced blanking */ 772 /* Minimum vertical blanking interval time (µs)- default 460 */ 773 #define CVT_RB_MIN_VBLANK 460 774 /* Fixed number of clocks for horizontal sync */ 775 #define CVT_RB_H_SYNC 32 776 /* Fixed number of clocks for horizontal blanking */ 777 #define CVT_RB_H_BLANK 160 778 /* Fixed number of lines for vertical front porch - default 3*/ 779 #define CVT_RB_VFPORCH 3 780 int vbilines; 781 int tmp1, tmp2; 782 /* 8. Estimate Horizontal period. */ 783 tmp1 = HV_FACTOR * 1000000 - 784 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 785 tmp2 = vdisplay_rnd + 2 * vmargin; 786 hperiod = tmp1 / (tmp2 * vfieldrate); 787 /* 9. Find number of lines in vertical blanking */ 788 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 789 /* 10. Check if vertical blanking is sufficient */ 790 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 791 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 792 /* 11. Find total number of lines in vertical field */ 793 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 794 /* 12. Find total number of pixels in a line */ 795 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 796 /* Fill in HSync values */ 797 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 798 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 799 /* Fill in VSync values */ 800 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 801 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 802 } 803 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 804 tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */ 805 tmp *= HV_FACTOR * 1000; 806 do_div(tmp, hperiod); 807 tmp -= drm_mode->clock % CVT_CLOCK_STEP; 808 drm_mode->clock = tmp; 809 /* 18/16. Find actual vertical frame frequency */ 810 /* ignore - just set the mode flag for interlaced */ 811 if (interlaced) { 812 drm_mode->vtotal *= 2; 813 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 814 } 815 /* Fill the mode line name */ 816 drm_mode_set_name(drm_mode); 817 if (reduced) 818 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 819 DRM_MODE_FLAG_NVSYNC); 820 else 821 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 822 DRM_MODE_FLAG_NHSYNC); 823 824 return drm_mode; 825 } 826 EXPORT_SYMBOL(drm_cvt_mode); 827 828 /** 829 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm 830 * @dev: drm device 831 * @hdisplay: hdisplay size 832 * @vdisplay: vdisplay size 833 * @vrefresh: vrefresh rate. 834 * @interlaced: whether to compute an interlaced mode 835 * @margins: desired margin (borders) size 836 * @GTF_M: extended GTF formula parameters 837 * @GTF_2C: extended GTF formula parameters 838 * @GTF_K: extended GTF formula parameters 839 * @GTF_2J: extended GTF formula parameters 840 * 841 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 842 * in here multiplied by two. For a C of 40, pass in 80. 843 * 844 * Returns: 845 * The modeline based on the full GTF algorithm stored in a drm_display_mode object. 846 * The display mode object is allocated with drm_mode_create(). Returns NULL 847 * when no mode could be allocated. 848 */ 849 struct drm_display_mode * 850 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 851 int vrefresh, bool interlaced, int margins, 852 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 853 { /* 1) top/bottom margin size (% of height) - default: 1.8, */ 854 #define GTF_MARGIN_PERCENTAGE 18 855 /* 2) character cell horizontal granularity (pixels) - default 8 */ 856 #define GTF_CELL_GRAN 8 857 /* 3) Minimum vertical porch (lines) - default 3 */ 858 #define GTF_MIN_V_PORCH 1 859 /* width of vsync in lines */ 860 #define V_SYNC_RQD 3 861 /* width of hsync as % of total line */ 862 #define H_SYNC_PERCENT 8 863 /* min time of vsync + back porch (microsec) */ 864 #define MIN_VSYNC_PLUS_BP 550 865 /* C' and M' are part of the Blanking Duty Cycle computation */ 866 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 867 #define GTF_M_PRIME (GTF_K * GTF_M / 256) 868 struct drm_display_mode *drm_mode; 869 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 870 int top_margin, bottom_margin; 871 int interlace; 872 unsigned int hfreq_est; 873 int vsync_plus_bp, __maybe_unused vback_porch; 874 unsigned int vtotal_lines, __maybe_unused vfieldrate_est; 875 unsigned int __maybe_unused hperiod; 876 unsigned int vfield_rate, __maybe_unused vframe_rate; 877 int left_margin, right_margin; 878 unsigned int total_active_pixels, ideal_duty_cycle; 879 unsigned int hblank, total_pixels, pixel_freq; 880 int hsync, hfront_porch, vodd_front_porch_lines; 881 unsigned int tmp1, tmp2; 882 883 if (!hdisplay || !vdisplay) 884 return NULL; 885 886 drm_mode = drm_mode_create(dev); 887 if (!drm_mode) 888 return NULL; 889 890 /* 1. In order to give correct results, the number of horizontal 891 * pixels requested is first processed to ensure that it is divisible 892 * by the character size, by rounding it to the nearest character 893 * cell boundary: 894 */ 895 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 896 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 897 898 /* 2. If interlace is requested, the number of vertical lines assumed 899 * by the calculation must be halved, as the computation calculates 900 * the number of vertical lines per field. 901 */ 902 if (interlaced) 903 vdisplay_rnd = vdisplay / 2; 904 else 905 vdisplay_rnd = vdisplay; 906 907 /* 3. Find the frame rate required: */ 908 if (interlaced) 909 vfieldrate_rqd = vrefresh * 2; 910 else 911 vfieldrate_rqd = vrefresh; 912 913 /* 4. Find number of lines in Top margin: */ 914 top_margin = 0; 915 if (margins) 916 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 917 1000; 918 /* 5. Find number of lines in bottom margin: */ 919 bottom_margin = top_margin; 920 921 /* 6. If interlace is required, then set variable interlace: */ 922 if (interlaced) 923 interlace = 1; 924 else 925 interlace = 0; 926 927 /* 7. Estimate the Horizontal frequency */ 928 { 929 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 930 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 931 2 + interlace; 932 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 933 } 934 935 /* 8. Find the number of lines in V sync + back porch */ 936 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 937 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 938 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 939 /* 9. Find the number of lines in V back porch alone: */ 940 vback_porch = vsync_plus_bp - V_SYNC_RQD; 941 /* 10. Find the total number of lines in Vertical field period: */ 942 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 943 vsync_plus_bp + GTF_MIN_V_PORCH; 944 /* 11. Estimate the Vertical field frequency: */ 945 vfieldrate_est = hfreq_est / vtotal_lines; 946 /* 12. Find the actual horizontal period: */ 947 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 948 949 /* 13. Find the actual Vertical field frequency: */ 950 vfield_rate = hfreq_est / vtotal_lines; 951 /* 14. Find the Vertical frame frequency: */ 952 if (interlaced) 953 vframe_rate = vfield_rate / 2; 954 else 955 vframe_rate = vfield_rate; 956 /* 15. Find number of pixels in left margin: */ 957 if (margins) 958 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 959 1000; 960 else 961 left_margin = 0; 962 963 /* 16.Find number of pixels in right margin: */ 964 right_margin = left_margin; 965 /* 17.Find total number of active pixels in image and left and right */ 966 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 967 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 968 ideal_duty_cycle = GTF_C_PRIME * 1000 - 969 (GTF_M_PRIME * 1000000 / hfreq_est); 970 /* 19.Find the number of pixels in the blanking time to the nearest 971 * double character cell: */ 972 hblank = total_active_pixels * ideal_duty_cycle / 973 (100000 - ideal_duty_cycle); 974 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 975 hblank = hblank * 2 * GTF_CELL_GRAN; 976 /* 20.Find total number of pixels: */ 977 total_pixels = total_active_pixels + hblank; 978 /* 21.Find pixel clock frequency: */ 979 pixel_freq = total_pixels * hfreq_est / 1000; 980 /* Stage 1 computations are now complete; I should really pass 981 * the results to another function and do the Stage 2 computations, 982 * but I only need a few more values so I'll just append the 983 * computations here for now */ 984 /* 17. Find the number of pixels in the horizontal sync period: */ 985 hsync = H_SYNC_PERCENT * total_pixels / 100; 986 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 987 hsync = hsync * GTF_CELL_GRAN; 988 /* 18. Find the number of pixels in horizontal front porch period */ 989 hfront_porch = hblank / 2 - hsync; 990 /* 36. Find the number of lines in the odd front porch period: */ 991 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 992 993 /* finally, pack the results in the mode struct */ 994 drm_mode->hdisplay = hdisplay_rnd; 995 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 996 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 997 drm_mode->htotal = total_pixels; 998 drm_mode->vdisplay = vdisplay_rnd; 999 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 1000 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 1001 drm_mode->vtotal = vtotal_lines; 1002 1003 drm_mode->clock = pixel_freq; 1004 1005 if (interlaced) { 1006 drm_mode->vtotal *= 2; 1007 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 1008 } 1009 1010 drm_mode_set_name(drm_mode); 1011 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 1012 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 1013 else 1014 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 1015 1016 return drm_mode; 1017 } 1018 EXPORT_SYMBOL(drm_gtf_mode_complex); 1019 1020 /** 1021 * drm_gtf_mode - create the modeline based on the GTF algorithm 1022 * @dev: drm device 1023 * @hdisplay: hdisplay size 1024 * @vdisplay: vdisplay size 1025 * @vrefresh: vrefresh rate. 1026 * @interlaced: whether to compute an interlaced mode 1027 * @margins: desired margin (borders) size 1028 * 1029 * return the modeline based on GTF algorithm 1030 * 1031 * This function is to create the modeline based on the GTF algorithm. 1032 * Generalized Timing Formula is derived from: 1033 * 1034 * GTF Spreadsheet by Andy Morrish (1/5/97) 1035 * available at https://www.vesa.org 1036 * 1037 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 1038 * What I have done is to translate it by using integer calculation. 1039 * I also refer to the function of fb_get_mode in the file of 1040 * drivers/video/fbmon.c 1041 * 1042 * Standard GTF parameters:: 1043 * 1044 * M = 600 1045 * C = 40 1046 * K = 128 1047 * J = 20 1048 * 1049 * Returns: 1050 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 1051 * The display mode object is allocated with drm_mode_create(). Returns NULL 1052 * when no mode could be allocated. 1053 */ 1054 struct drm_display_mode * 1055 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 1056 bool interlaced, int margins) 1057 { 1058 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 1059 interlaced, margins, 1060 600, 40 * 2, 128, 20 * 2); 1061 } 1062 EXPORT_SYMBOL(drm_gtf_mode); 1063 1064 #ifdef CONFIG_VIDEOMODE_HELPERS 1065 /** 1066 * drm_display_mode_from_videomode - fill in @dmode using @vm, 1067 * @vm: videomode structure to use as source 1068 * @dmode: drm_display_mode structure to use as destination 1069 * 1070 * Fills out @dmode using the display mode specified in @vm. 1071 */ 1072 void drm_display_mode_from_videomode(const struct videomode *vm, 1073 struct drm_display_mode *dmode) 1074 { 1075 dmode->hdisplay = vm->hactive; 1076 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 1077 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 1078 dmode->htotal = dmode->hsync_end + vm->hback_porch; 1079 1080 dmode->vdisplay = vm->vactive; 1081 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 1082 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 1083 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 1084 1085 dmode->clock = vm->pixelclock / 1000; 1086 1087 dmode->flags = 0; 1088 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 1089 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 1090 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 1091 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 1092 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 1093 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 1094 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 1095 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 1096 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 1097 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 1098 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 1099 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 1100 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 1101 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 1102 drm_mode_set_name(dmode); 1103 } 1104 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 1105 1106 /** 1107 * drm_display_mode_to_videomode - fill in @vm using @dmode, 1108 * @dmode: drm_display_mode structure to use as source 1109 * @vm: videomode structure to use as destination 1110 * 1111 * Fills out @vm using the display mode specified in @dmode. 1112 */ 1113 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 1114 struct videomode *vm) 1115 { 1116 vm->hactive = dmode->hdisplay; 1117 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 1118 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 1119 vm->hback_porch = dmode->htotal - dmode->hsync_end; 1120 1121 vm->vactive = dmode->vdisplay; 1122 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 1123 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 1124 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 1125 1126 vm->pixelclock = dmode->clock * 1000; 1127 1128 vm->flags = 0; 1129 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 1130 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 1131 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 1132 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 1133 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 1134 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 1135 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 1136 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 1137 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 1138 vm->flags |= DISPLAY_FLAGS_INTERLACED; 1139 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 1140 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1141 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 1142 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 1143 } 1144 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 1145 1146 /** 1147 * drm_bus_flags_from_videomode - extract information about pixelclk and 1148 * DE polarity from videomode and store it in a separate variable 1149 * @vm: videomode structure to use 1150 * @bus_flags: information about pixelclk, sync and DE polarity will be stored 1151 * here 1152 * 1153 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH), DRM_BUS_FLAG_PIXDATA_DRIVE_(POS|NEG)EDGE 1154 * and DISPLAY_FLAGS_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS 1155 * found in @vm 1156 */ 1157 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) 1158 { 1159 *bus_flags = 0; 1160 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) 1161 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE; 1162 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 1163 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; 1164 1165 if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE) 1166 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE; 1167 if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE) 1168 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE; 1169 1170 if (vm->flags & DISPLAY_FLAGS_DE_LOW) 1171 *bus_flags |= DRM_BUS_FLAG_DE_LOW; 1172 if (vm->flags & DISPLAY_FLAGS_DE_HIGH) 1173 *bus_flags |= DRM_BUS_FLAG_DE_HIGH; 1174 } 1175 EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); 1176 1177 #ifdef CONFIG_OF 1178 /** 1179 * of_get_drm_display_mode - get a drm_display_mode from devicetree 1180 * @np: device_node with the timing specification 1181 * @dmode: will be set to the return value 1182 * @bus_flags: information about pixelclk, sync and DE polarity 1183 * @index: index into the list of display timings in devicetree 1184 * 1185 * This function is expensive and should only be used, if only one mode is to be 1186 * read from DT. To get multiple modes start with of_get_display_timings and 1187 * work with that instead. 1188 * 1189 * Returns: 1190 * 0 on success, a negative errno code when no of videomode node was found. 1191 */ 1192 int of_get_drm_display_mode(struct device_node *np, 1193 struct drm_display_mode *dmode, u32 *bus_flags, 1194 int index) 1195 { 1196 struct videomode vm; 1197 int ret; 1198 1199 ret = of_get_videomode(np, &vm, index); 1200 if (ret) 1201 return ret; 1202 1203 drm_display_mode_from_videomode(&vm, dmode); 1204 if (bus_flags) 1205 drm_bus_flags_from_videomode(&vm, bus_flags); 1206 1207 pr_debug("%pOF: got %dx%d display mode: " DRM_MODE_FMT "\n", 1208 np, vm.hactive, vm.vactive, DRM_MODE_ARG(dmode)); 1209 1210 return 0; 1211 } 1212 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 1213 1214 /** 1215 * of_get_drm_panel_display_mode - get a panel-timing drm_display_mode from devicetree 1216 * @np: device_node with the panel-timing specification 1217 * @dmode: will be set to the return value 1218 * @bus_flags: information about pixelclk, sync and DE polarity 1219 * 1220 * The mandatory Device Tree properties width-mm and height-mm 1221 * are read and set on the display mode. 1222 * 1223 * Returns: 1224 * Zero on success, negative error code on failure. 1225 */ 1226 int of_get_drm_panel_display_mode(struct device_node *np, 1227 struct drm_display_mode *dmode, u32 *bus_flags) 1228 { 1229 u32 width_mm = 0, height_mm = 0; 1230 struct display_timing timing; 1231 struct videomode vm; 1232 int ret; 1233 1234 ret = of_get_display_timing(np, "panel-timing", &timing); 1235 if (ret) 1236 return ret; 1237 1238 videomode_from_timing(&timing, &vm); 1239 1240 memset(dmode, 0, sizeof(*dmode)); 1241 drm_display_mode_from_videomode(&vm, dmode); 1242 if (bus_flags) 1243 drm_bus_flags_from_videomode(&vm, bus_flags); 1244 1245 ret = of_property_read_u32(np, "width-mm", &width_mm); 1246 if (ret) 1247 return ret; 1248 1249 ret = of_property_read_u32(np, "height-mm", &height_mm); 1250 if (ret) 1251 return ret; 1252 1253 dmode->width_mm = width_mm; 1254 dmode->height_mm = height_mm; 1255 1256 pr_debug(DRM_MODE_FMT "\n", DRM_MODE_ARG(dmode)); 1257 1258 return 0; 1259 } 1260 EXPORT_SYMBOL_GPL(of_get_drm_panel_display_mode); 1261 #endif /* CONFIG_OF */ 1262 #endif /* CONFIG_VIDEOMODE_HELPERS */ 1263 1264 /** 1265 * drm_mode_set_name - set the name on a mode 1266 * @mode: name will be set in this mode 1267 * 1268 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 1269 * with an optional 'i' suffix for interlaced modes. 1270 */ 1271 void drm_mode_set_name(struct drm_display_mode *mode) 1272 { 1273 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 1274 1275 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 1276 mode->hdisplay, mode->vdisplay, 1277 interlaced ? "i" : ""); 1278 } 1279 EXPORT_SYMBOL(drm_mode_set_name); 1280 1281 /** 1282 * drm_mode_vrefresh - get the vrefresh of a mode 1283 * @mode: mode 1284 * 1285 * Returns: 1286 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 1287 * value first if it is not yet set. 1288 */ 1289 int drm_mode_vrefresh(const struct drm_display_mode *mode) 1290 { 1291 unsigned int num, den; 1292 1293 if (mode->htotal == 0 || mode->vtotal == 0) 1294 return 0; 1295 1296 num = mode->clock; 1297 den = mode->htotal * mode->vtotal; 1298 1299 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 1300 num *= 2; 1301 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 1302 den *= 2; 1303 if (mode->vscan > 1) 1304 den *= mode->vscan; 1305 1306 return DIV_ROUND_CLOSEST_ULL(mul_u32_u32(num, 1000), den); 1307 } 1308 EXPORT_SYMBOL(drm_mode_vrefresh); 1309 1310 /** 1311 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode 1312 * @mode: mode to query 1313 * @hdisplay: hdisplay value to fill in 1314 * @vdisplay: vdisplay value to fill in 1315 * 1316 * The vdisplay value will be doubled if the specified mode is a stereo mode of 1317 * the appropriate layout. 1318 */ 1319 void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 1320 int *hdisplay, int *vdisplay) 1321 { 1322 struct drm_display_mode adjusted; 1323 1324 drm_mode_init(&adjusted, mode); 1325 1326 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 1327 *hdisplay = adjusted.crtc_hdisplay; 1328 *vdisplay = adjusted.crtc_vdisplay; 1329 } 1330 EXPORT_SYMBOL(drm_mode_get_hv_timing); 1331 1332 /** 1333 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 1334 * @p: mode 1335 * @adjust_flags: a combination of adjustment flags 1336 * 1337 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 1338 * 1339 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 1340 * interlaced modes. 1341 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 1342 * buffers containing two eyes (only adjust the timings when needed, eg. for 1343 * "frame packing" or "side by side full"). 1344 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 1345 * be performed for doublescan and vscan > 1 modes respectively. 1346 */ 1347 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 1348 { 1349 if (!p) 1350 return; 1351 1352 p->crtc_clock = p->clock; 1353 p->crtc_hdisplay = p->hdisplay; 1354 p->crtc_hsync_start = p->hsync_start; 1355 p->crtc_hsync_end = p->hsync_end; 1356 p->crtc_htotal = p->htotal; 1357 p->crtc_hskew = p->hskew; 1358 p->crtc_vdisplay = p->vdisplay; 1359 p->crtc_vsync_start = p->vsync_start; 1360 p->crtc_vsync_end = p->vsync_end; 1361 p->crtc_vtotal = p->vtotal; 1362 1363 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 1364 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 1365 p->crtc_vdisplay /= 2; 1366 p->crtc_vsync_start /= 2; 1367 p->crtc_vsync_end /= 2; 1368 p->crtc_vtotal /= 2; 1369 } 1370 } 1371 1372 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 1373 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 1374 p->crtc_vdisplay *= 2; 1375 p->crtc_vsync_start *= 2; 1376 p->crtc_vsync_end *= 2; 1377 p->crtc_vtotal *= 2; 1378 } 1379 } 1380 1381 if (!(adjust_flags & CRTC_NO_VSCAN)) { 1382 if (p->vscan > 1) { 1383 p->crtc_vdisplay *= p->vscan; 1384 p->crtc_vsync_start *= p->vscan; 1385 p->crtc_vsync_end *= p->vscan; 1386 p->crtc_vtotal *= p->vscan; 1387 } 1388 } 1389 1390 if (adjust_flags & CRTC_STEREO_DOUBLE) { 1391 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 1392 1393 switch (layout) { 1394 case DRM_MODE_FLAG_3D_FRAME_PACKING: 1395 p->crtc_clock *= 2; 1396 p->crtc_vdisplay += p->crtc_vtotal; 1397 p->crtc_vsync_start += p->crtc_vtotal; 1398 p->crtc_vsync_end += p->crtc_vtotal; 1399 p->crtc_vtotal += p->crtc_vtotal; 1400 break; 1401 } 1402 } 1403 1404 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 1405 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 1406 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 1407 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 1408 } 1409 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 1410 1411 /** 1412 * drm_mode_copy - copy the mode 1413 * @dst: mode to overwrite 1414 * @src: mode to copy 1415 * 1416 * Copy an existing mode into another mode, preserving the 1417 * list head of the destination mode. 1418 */ 1419 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 1420 { 1421 struct list_head head = dst->head; 1422 1423 *dst = *src; 1424 dst->head = head; 1425 } 1426 EXPORT_SYMBOL(drm_mode_copy); 1427 1428 /** 1429 * drm_mode_init - initialize the mode from another mode 1430 * @dst: mode to overwrite 1431 * @src: mode to copy 1432 * 1433 * Copy an existing mode into another mode, zeroing the 1434 * list head of the destination mode. Typically used 1435 * to guarantee the list head is not left with stack 1436 * garbage in on-stack modes. 1437 */ 1438 void drm_mode_init(struct drm_display_mode *dst, const struct drm_display_mode *src) 1439 { 1440 memset(dst, 0, sizeof(*dst)); 1441 drm_mode_copy(dst, src); 1442 } 1443 EXPORT_SYMBOL(drm_mode_init); 1444 1445 /** 1446 * drm_mode_duplicate - allocate and duplicate an existing mode 1447 * @dev: drm_device to allocate the duplicated mode for 1448 * @mode: mode to duplicate 1449 * 1450 * Just allocate a new mode, copy the existing mode into it, and return 1451 * a pointer to it. Used to create new instances of established modes. 1452 * 1453 * Returns: 1454 * Pointer to duplicated mode on success, NULL on error. 1455 */ 1456 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 1457 const struct drm_display_mode *mode) 1458 { 1459 struct drm_display_mode *nmode; 1460 1461 nmode = drm_mode_create(dev); 1462 if (!nmode) 1463 return NULL; 1464 1465 drm_mode_copy(nmode, mode); 1466 1467 return nmode; 1468 } 1469 EXPORT_SYMBOL(drm_mode_duplicate); 1470 1471 static bool drm_mode_match_timings(const struct drm_display_mode *mode1, 1472 const struct drm_display_mode *mode2) 1473 { 1474 return mode1->hdisplay == mode2->hdisplay && 1475 mode1->hsync_start == mode2->hsync_start && 1476 mode1->hsync_end == mode2->hsync_end && 1477 mode1->htotal == mode2->htotal && 1478 mode1->hskew == mode2->hskew && 1479 mode1->vdisplay == mode2->vdisplay && 1480 mode1->vsync_start == mode2->vsync_start && 1481 mode1->vsync_end == mode2->vsync_end && 1482 mode1->vtotal == mode2->vtotal && 1483 mode1->vscan == mode2->vscan; 1484 } 1485 1486 static bool drm_mode_match_clock(const struct drm_display_mode *mode1, 1487 const struct drm_display_mode *mode2) 1488 { 1489 /* 1490 * do clock check convert to PICOS 1491 * so fb modes get matched the same 1492 */ 1493 if (mode1->clock && mode2->clock) 1494 return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock); 1495 else 1496 return mode1->clock == mode2->clock; 1497 } 1498 1499 static bool drm_mode_match_flags(const struct drm_display_mode *mode1, 1500 const struct drm_display_mode *mode2) 1501 { 1502 return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 1503 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK); 1504 } 1505 1506 static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1, 1507 const struct drm_display_mode *mode2) 1508 { 1509 return (mode1->flags & DRM_MODE_FLAG_3D_MASK) == 1510 (mode2->flags & DRM_MODE_FLAG_3D_MASK); 1511 } 1512 1513 static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1, 1514 const struct drm_display_mode *mode2) 1515 { 1516 return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio; 1517 } 1518 1519 /** 1520 * drm_mode_match - test modes for (partial) equality 1521 * @mode1: first mode 1522 * @mode2: second mode 1523 * @match_flags: which parts need to match (DRM_MODE_MATCH_*) 1524 * 1525 * Check to see if @mode1 and @mode2 are equivalent. 1526 * 1527 * Returns: 1528 * True if the modes are (partially) equal, false otherwise. 1529 */ 1530 bool drm_mode_match(const struct drm_display_mode *mode1, 1531 const struct drm_display_mode *mode2, 1532 unsigned int match_flags) 1533 { 1534 if (!mode1 && !mode2) 1535 return true; 1536 1537 if (!mode1 || !mode2) 1538 return false; 1539 1540 if (match_flags & DRM_MODE_MATCH_TIMINGS && 1541 !drm_mode_match_timings(mode1, mode2)) 1542 return false; 1543 1544 if (match_flags & DRM_MODE_MATCH_CLOCK && 1545 !drm_mode_match_clock(mode1, mode2)) 1546 return false; 1547 1548 if (match_flags & DRM_MODE_MATCH_FLAGS && 1549 !drm_mode_match_flags(mode1, mode2)) 1550 return false; 1551 1552 if (match_flags & DRM_MODE_MATCH_3D_FLAGS && 1553 !drm_mode_match_3d_flags(mode1, mode2)) 1554 return false; 1555 1556 if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO && 1557 !drm_mode_match_aspect_ratio(mode1, mode2)) 1558 return false; 1559 1560 return true; 1561 } 1562 EXPORT_SYMBOL(drm_mode_match); 1563 1564 /** 1565 * drm_mode_equal - test modes for equality 1566 * @mode1: first mode 1567 * @mode2: second mode 1568 * 1569 * Check to see if @mode1 and @mode2 are equivalent. 1570 * 1571 * Returns: 1572 * True if the modes are equal, false otherwise. 1573 */ 1574 bool drm_mode_equal(const struct drm_display_mode *mode1, 1575 const struct drm_display_mode *mode2) 1576 { 1577 return drm_mode_match(mode1, mode2, 1578 DRM_MODE_MATCH_TIMINGS | 1579 DRM_MODE_MATCH_CLOCK | 1580 DRM_MODE_MATCH_FLAGS | 1581 DRM_MODE_MATCH_3D_FLAGS| 1582 DRM_MODE_MATCH_ASPECT_RATIO); 1583 } 1584 EXPORT_SYMBOL(drm_mode_equal); 1585 1586 /** 1587 * drm_mode_equal_no_clocks - test modes for equality 1588 * @mode1: first mode 1589 * @mode2: second mode 1590 * 1591 * Check to see if @mode1 and @mode2 are equivalent, but 1592 * don't check the pixel clocks. 1593 * 1594 * Returns: 1595 * True if the modes are equal, false otherwise. 1596 */ 1597 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, 1598 const struct drm_display_mode *mode2) 1599 { 1600 return drm_mode_match(mode1, mode2, 1601 DRM_MODE_MATCH_TIMINGS | 1602 DRM_MODE_MATCH_FLAGS | 1603 DRM_MODE_MATCH_3D_FLAGS); 1604 } 1605 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 1606 1607 /** 1608 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 1609 * @mode1: first mode 1610 * @mode2: second mode 1611 * 1612 * Check to see if @mode1 and @mode2 are equivalent, but 1613 * don't check the pixel clocks nor the stereo layout. 1614 * 1615 * Returns: 1616 * True if the modes are equal, false otherwise. 1617 */ 1618 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 1619 const struct drm_display_mode *mode2) 1620 { 1621 return drm_mode_match(mode1, mode2, 1622 DRM_MODE_MATCH_TIMINGS | 1623 DRM_MODE_MATCH_FLAGS); 1624 } 1625 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1626 1627 static enum drm_mode_status 1628 drm_mode_validate_basic(const struct drm_display_mode *mode) 1629 { 1630 if (mode->type & ~DRM_MODE_TYPE_ALL) 1631 return MODE_BAD; 1632 1633 if (mode->flags & ~DRM_MODE_FLAG_ALL) 1634 return MODE_BAD; 1635 1636 if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1637 return MODE_BAD; 1638 1639 if (mode->clock == 0) 1640 return MODE_CLOCK_LOW; 1641 1642 if (mode->hdisplay == 0 || 1643 mode->hsync_start < mode->hdisplay || 1644 mode->hsync_end < mode->hsync_start || 1645 mode->htotal < mode->hsync_end) 1646 return MODE_H_ILLEGAL; 1647 1648 if (mode->vdisplay == 0 || 1649 mode->vsync_start < mode->vdisplay || 1650 mode->vsync_end < mode->vsync_start || 1651 mode->vtotal < mode->vsync_end) 1652 return MODE_V_ILLEGAL; 1653 1654 return MODE_OK; 1655 } 1656 1657 /** 1658 * drm_mode_validate_driver - make sure the mode is somewhat sane 1659 * @dev: drm device 1660 * @mode: mode to check 1661 * 1662 * First do basic validation on the mode, and then allow the driver 1663 * to check for device/driver specific limitations via the optional 1664 * &drm_mode_config_helper_funcs.mode_valid hook. 1665 * 1666 * Returns: 1667 * The mode status 1668 */ 1669 enum drm_mode_status 1670 drm_mode_validate_driver(struct drm_device *dev, 1671 const struct drm_display_mode *mode) 1672 { 1673 enum drm_mode_status status; 1674 1675 status = drm_mode_validate_basic(mode); 1676 if (status != MODE_OK) 1677 return status; 1678 1679 if (dev->mode_config.funcs->mode_valid) 1680 return dev->mode_config.funcs->mode_valid(dev, mode); 1681 else 1682 return MODE_OK; 1683 } 1684 EXPORT_SYMBOL(drm_mode_validate_driver); 1685 1686 /** 1687 * drm_mode_validate_size - make sure modes adhere to size constraints 1688 * @mode: mode to check 1689 * @maxX: maximum width 1690 * @maxY: maximum height 1691 * 1692 * This function is a helper which can be used to validate modes against size 1693 * limitations of the DRM device/connector. If a mode is too big its status 1694 * member is updated with the appropriate validation failure code. The list 1695 * itself is not changed. 1696 * 1697 * Returns: 1698 * The mode status 1699 */ 1700 enum drm_mode_status 1701 drm_mode_validate_size(const struct drm_display_mode *mode, 1702 int maxX, int maxY) 1703 { 1704 if (maxX > 0 && mode->hdisplay > maxX) 1705 return MODE_VIRTUAL_X; 1706 1707 if (maxY > 0 && mode->vdisplay > maxY) 1708 return MODE_VIRTUAL_Y; 1709 1710 return MODE_OK; 1711 } 1712 EXPORT_SYMBOL(drm_mode_validate_size); 1713 1714 /** 1715 * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed 1716 * @mode: mode to check 1717 * @connector: drm connector under action 1718 * 1719 * This function is a helper which can be used to filter out any YCBCR420 1720 * only mode, when the source doesn't support it. 1721 * 1722 * Returns: 1723 * The mode status 1724 */ 1725 enum drm_mode_status 1726 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode, 1727 struct drm_connector *connector) 1728 { 1729 if (!connector->ycbcr_420_allowed && 1730 drm_mode_is_420_only(&connector->display_info, mode)) 1731 return MODE_NO_420; 1732 1733 return MODE_OK; 1734 } 1735 EXPORT_SYMBOL(drm_mode_validate_ycbcr420); 1736 1737 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1738 1739 static const char * const drm_mode_status_names[] = { 1740 MODE_STATUS(OK), 1741 MODE_STATUS(HSYNC), 1742 MODE_STATUS(VSYNC), 1743 MODE_STATUS(H_ILLEGAL), 1744 MODE_STATUS(V_ILLEGAL), 1745 MODE_STATUS(BAD_WIDTH), 1746 MODE_STATUS(NOMODE), 1747 MODE_STATUS(NO_INTERLACE), 1748 MODE_STATUS(NO_DBLESCAN), 1749 MODE_STATUS(NO_VSCAN), 1750 MODE_STATUS(MEM), 1751 MODE_STATUS(VIRTUAL_X), 1752 MODE_STATUS(VIRTUAL_Y), 1753 MODE_STATUS(MEM_VIRT), 1754 MODE_STATUS(NOCLOCK), 1755 MODE_STATUS(CLOCK_HIGH), 1756 MODE_STATUS(CLOCK_LOW), 1757 MODE_STATUS(CLOCK_RANGE), 1758 MODE_STATUS(BAD_HVALUE), 1759 MODE_STATUS(BAD_VVALUE), 1760 MODE_STATUS(BAD_VSCAN), 1761 MODE_STATUS(HSYNC_NARROW), 1762 MODE_STATUS(HSYNC_WIDE), 1763 MODE_STATUS(HBLANK_NARROW), 1764 MODE_STATUS(HBLANK_WIDE), 1765 MODE_STATUS(VSYNC_NARROW), 1766 MODE_STATUS(VSYNC_WIDE), 1767 MODE_STATUS(VBLANK_NARROW), 1768 MODE_STATUS(VBLANK_WIDE), 1769 MODE_STATUS(PANEL), 1770 MODE_STATUS(INTERLACE_WIDTH), 1771 MODE_STATUS(ONE_WIDTH), 1772 MODE_STATUS(ONE_HEIGHT), 1773 MODE_STATUS(ONE_SIZE), 1774 MODE_STATUS(NO_REDUCED), 1775 MODE_STATUS(NO_STEREO), 1776 MODE_STATUS(NO_420), 1777 MODE_STATUS(STALE), 1778 MODE_STATUS(BAD), 1779 MODE_STATUS(ERROR), 1780 }; 1781 1782 #undef MODE_STATUS 1783 1784 const char *drm_get_mode_status_name(enum drm_mode_status status) 1785 { 1786 int index = status + 3; 1787 1788 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1789 return ""; 1790 1791 return drm_mode_status_names[index]; 1792 } 1793 1794 /** 1795 * drm_mode_prune_invalid - remove invalid modes from mode list 1796 * @dev: DRM device 1797 * @mode_list: list of modes to check 1798 * @verbose: be verbose about it 1799 * 1800 * This helper function can be used to prune a display mode list after 1801 * validation has been completed. All modes whose status is not MODE_OK will be 1802 * removed from the list, and if @verbose the status code and mode name is also 1803 * printed to dmesg. 1804 */ 1805 void drm_mode_prune_invalid(struct drm_device *dev, 1806 struct list_head *mode_list, bool verbose) 1807 { 1808 struct drm_display_mode *mode, *t; 1809 1810 list_for_each_entry_safe(mode, t, mode_list, head) { 1811 if (mode->status != MODE_OK) { 1812 list_del(&mode->head); 1813 if (mode->type & DRM_MODE_TYPE_USERDEF) { 1814 drm_warn(dev, "User-defined mode not supported: " 1815 DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 1816 } 1817 if (verbose) { 1818 drm_dbg_kms(dev, "Rejected mode: " DRM_MODE_FMT " (%s)\n", 1819 DRM_MODE_ARG(mode), drm_get_mode_status_name(mode->status)); 1820 } 1821 drm_mode_destroy(dev, mode); 1822 } 1823 } 1824 } 1825 EXPORT_SYMBOL(drm_mode_prune_invalid); 1826 1827 /** 1828 * drm_mode_compare - compare modes for favorability 1829 * @priv: unused 1830 * @lh_a: list_head for first mode 1831 * @lh_b: list_head for second mode 1832 * 1833 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1834 * which is better. 1835 * 1836 * Returns: 1837 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1838 * positive if @lh_b is better than @lh_a. 1839 */ 1840 static int drm_mode_compare(void *priv, const struct list_head *lh_a, 1841 const struct list_head *lh_b) 1842 { 1843 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1844 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1845 int diff; 1846 1847 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1848 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1849 if (diff) 1850 return diff; 1851 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1852 if (diff) 1853 return diff; 1854 1855 diff = drm_mode_vrefresh(b) - drm_mode_vrefresh(a); 1856 if (diff) 1857 return diff; 1858 1859 diff = b->clock - a->clock; 1860 return diff; 1861 } 1862 1863 /** 1864 * drm_mode_sort - sort mode list 1865 * @mode_list: list of drm_display_mode structures to sort 1866 * 1867 * Sort @mode_list by favorability, moving good modes to the head of the list. 1868 */ 1869 void drm_mode_sort(struct list_head *mode_list) 1870 { 1871 list_sort(NULL, mode_list, drm_mode_compare); 1872 } 1873 EXPORT_SYMBOL(drm_mode_sort); 1874 1875 /** 1876 * drm_connector_list_update - update the mode list for the connector 1877 * @connector: the connector to update 1878 * 1879 * This moves the modes from the @connector probed_modes list 1880 * to the actual mode list. It compares the probed mode against the current 1881 * list and only adds different/new modes. 1882 * 1883 * This is just a helper functions doesn't validate any modes itself and also 1884 * doesn't prune any invalid modes. Callers need to do that themselves. 1885 */ 1886 void drm_connector_list_update(struct drm_connector *connector) 1887 { 1888 struct drm_display_mode *pmode, *pt; 1889 1890 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1891 1892 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1893 struct drm_display_mode *mode; 1894 bool found_it = false; 1895 1896 /* go through current modes checking for the new probed mode */ 1897 list_for_each_entry(mode, &connector->modes, head) { 1898 if (!drm_mode_equal(pmode, mode)) 1899 continue; 1900 1901 found_it = true; 1902 1903 /* 1904 * If the old matching mode is stale (ie. left over 1905 * from a previous probe) just replace it outright. 1906 * Otherwise just merge the type bits between all 1907 * equal probed modes. 1908 * 1909 * If two probed modes are considered equal, pick the 1910 * actual timings from the one that's marked as 1911 * preferred (in case the match isn't 100%). If 1912 * multiple or zero preferred modes are present, favor 1913 * the mode added to the probed_modes list first. 1914 */ 1915 if (mode->status == MODE_STALE) { 1916 drm_mode_copy(mode, pmode); 1917 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1918 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1919 pmode->type |= mode->type; 1920 drm_mode_copy(mode, pmode); 1921 } else { 1922 mode->type |= pmode->type; 1923 } 1924 1925 list_del(&pmode->head); 1926 drm_mode_destroy(connector->dev, pmode); 1927 break; 1928 } 1929 1930 if (!found_it) { 1931 list_move_tail(&pmode->head, &connector->modes); 1932 } 1933 } 1934 } 1935 EXPORT_SYMBOL(drm_connector_list_update); 1936 1937 static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, 1938 struct drm_cmdline_mode *mode) 1939 { 1940 unsigned int bpp; 1941 1942 if (str[0] != '-') 1943 return -EINVAL; 1944 1945 str++; 1946 bpp = simple_strtol(str, end_ptr, 10); 1947 if (*end_ptr == str) 1948 return -EINVAL; 1949 1950 mode->bpp = bpp; 1951 mode->bpp_specified = true; 1952 1953 return 0; 1954 } 1955 1956 static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, 1957 struct drm_cmdline_mode *mode) 1958 { 1959 unsigned int refresh; 1960 1961 if (str[0] != '@') 1962 return -EINVAL; 1963 1964 str++; 1965 refresh = simple_strtol(str, end_ptr, 10); 1966 if (*end_ptr == str) 1967 return -EINVAL; 1968 1969 mode->refresh = refresh; 1970 mode->refresh_specified = true; 1971 1972 return 0; 1973 } 1974 1975 static int drm_mode_parse_cmdline_extra(const char *str, int length, 1976 bool freestanding, 1977 const struct drm_connector *connector, 1978 struct drm_cmdline_mode *mode) 1979 { 1980 int i; 1981 1982 for (i = 0; i < length; i++) { 1983 switch (str[i]) { 1984 case 'i': 1985 if (freestanding) 1986 return -EINVAL; 1987 1988 mode->interlace = true; 1989 break; 1990 case 'm': 1991 if (freestanding) 1992 return -EINVAL; 1993 1994 mode->margins = true; 1995 break; 1996 case 'D': 1997 if (mode->force != DRM_FORCE_UNSPECIFIED) 1998 return -EINVAL; 1999 2000 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 2001 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 2002 mode->force = DRM_FORCE_ON; 2003 else 2004 mode->force = DRM_FORCE_ON_DIGITAL; 2005 break; 2006 case 'd': 2007 if (mode->force != DRM_FORCE_UNSPECIFIED) 2008 return -EINVAL; 2009 2010 mode->force = DRM_FORCE_OFF; 2011 break; 2012 case 'e': 2013 if (mode->force != DRM_FORCE_UNSPECIFIED) 2014 return -EINVAL; 2015 2016 mode->force = DRM_FORCE_ON; 2017 break; 2018 default: 2019 return -EINVAL; 2020 } 2021 } 2022 2023 return 0; 2024 } 2025 2026 static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, 2027 bool extras, 2028 const struct drm_connector *connector, 2029 struct drm_cmdline_mode *mode) 2030 { 2031 const char *str_start = str; 2032 bool rb = false, cvt = false; 2033 int xres = 0, yres = 0; 2034 int remaining, i; 2035 char *end_ptr; 2036 2037 xres = simple_strtol(str, &end_ptr, 10); 2038 if (end_ptr == str) 2039 return -EINVAL; 2040 2041 if (end_ptr[0] != 'x') 2042 return -EINVAL; 2043 end_ptr++; 2044 2045 str = end_ptr; 2046 yres = simple_strtol(str, &end_ptr, 10); 2047 if (end_ptr == str) 2048 return -EINVAL; 2049 2050 remaining = length - (end_ptr - str_start); 2051 if (remaining < 0) 2052 return -EINVAL; 2053 2054 for (i = 0; i < remaining; i++) { 2055 switch (end_ptr[i]) { 2056 case 'M': 2057 cvt = true; 2058 break; 2059 case 'R': 2060 rb = true; 2061 break; 2062 default: 2063 /* 2064 * Try to pass that to our extras parsing 2065 * function to handle the case where the 2066 * extras are directly after the resolution 2067 */ 2068 if (extras) { 2069 int ret = drm_mode_parse_cmdline_extra(end_ptr + i, 2070 1, 2071 false, 2072 connector, 2073 mode); 2074 if (ret) 2075 return ret; 2076 } else { 2077 return -EINVAL; 2078 } 2079 } 2080 } 2081 2082 mode->xres = xres; 2083 mode->yres = yres; 2084 mode->cvt = cvt; 2085 mode->rb = rb; 2086 2087 return 0; 2088 } 2089 2090 static int drm_mode_parse_cmdline_int(const char *delim, unsigned int *int_ret) 2091 { 2092 const char *value; 2093 char *endp; 2094 2095 /* 2096 * delim must point to the '=', otherwise it is a syntax error and 2097 * if delim points to the terminating zero, then delim + 1 will point 2098 * past the end of the string. 2099 */ 2100 if (*delim != '=') 2101 return -EINVAL; 2102 2103 value = delim + 1; 2104 *int_ret = simple_strtol(value, &endp, 10); 2105 2106 /* Make sure we have parsed something */ 2107 if (endp == value) 2108 return -EINVAL; 2109 2110 return 0; 2111 } 2112 2113 static int drm_mode_parse_panel_orientation(const char *delim, 2114 struct drm_cmdline_mode *mode) 2115 { 2116 const char *value; 2117 2118 if (*delim != '=') 2119 return -EINVAL; 2120 2121 value = delim + 1; 2122 delim = strchr(value, ','); 2123 if (!delim) 2124 delim = value + strlen(value); 2125 2126 if (!strncmp(value, "normal", delim - value)) 2127 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL; 2128 else if (!strncmp(value, "upside_down", delim - value)) 2129 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP; 2130 else if (!strncmp(value, "left_side_up", delim - value)) 2131 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP; 2132 else if (!strncmp(value, "right_side_up", delim - value)) 2133 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP; 2134 else 2135 return -EINVAL; 2136 2137 return 0; 2138 } 2139 2140 static int drm_mode_parse_tv_mode(const char *delim, 2141 struct drm_cmdline_mode *mode) 2142 { 2143 const char *value; 2144 int ret; 2145 2146 if (*delim != '=') 2147 return -EINVAL; 2148 2149 value = delim + 1; 2150 delim = strchr(value, ','); 2151 if (!delim) 2152 delim = value + strlen(value); 2153 2154 ret = drm_get_tv_mode_from_name(value, delim - value); 2155 if (ret < 0) 2156 return ret; 2157 2158 mode->tv_mode_specified = true; 2159 mode->tv_mode = ret; 2160 2161 return 0; 2162 } 2163 2164 static int drm_mode_parse_cmdline_options(const char *str, 2165 bool freestanding, 2166 const struct drm_connector *connector, 2167 struct drm_cmdline_mode *mode) 2168 { 2169 unsigned int deg, margin, rotation = 0; 2170 const char *delim, *option, *sep; 2171 2172 option = str; 2173 do { 2174 delim = strchr(option, '='); 2175 if (!delim) { 2176 delim = strchr(option, ','); 2177 2178 if (!delim) 2179 delim = option + strlen(option); 2180 } 2181 2182 if (!strncmp(option, "rotate", delim - option)) { 2183 if (drm_mode_parse_cmdline_int(delim, °)) 2184 return -EINVAL; 2185 2186 switch (deg) { 2187 case 0: 2188 rotation |= DRM_MODE_ROTATE_0; 2189 break; 2190 2191 case 90: 2192 rotation |= DRM_MODE_ROTATE_90; 2193 break; 2194 2195 case 180: 2196 rotation |= DRM_MODE_ROTATE_180; 2197 break; 2198 2199 case 270: 2200 rotation |= DRM_MODE_ROTATE_270; 2201 break; 2202 2203 default: 2204 return -EINVAL; 2205 } 2206 } else if (!strncmp(option, "reflect_x", delim - option)) { 2207 rotation |= DRM_MODE_REFLECT_X; 2208 } else if (!strncmp(option, "reflect_y", delim - option)) { 2209 rotation |= DRM_MODE_REFLECT_Y; 2210 } else if (!strncmp(option, "margin_right", delim - option)) { 2211 if (drm_mode_parse_cmdline_int(delim, &margin)) 2212 return -EINVAL; 2213 2214 mode->tv_margins.right = margin; 2215 } else if (!strncmp(option, "margin_left", delim - option)) { 2216 if (drm_mode_parse_cmdline_int(delim, &margin)) 2217 return -EINVAL; 2218 2219 mode->tv_margins.left = margin; 2220 } else if (!strncmp(option, "margin_top", delim - option)) { 2221 if (drm_mode_parse_cmdline_int(delim, &margin)) 2222 return -EINVAL; 2223 2224 mode->tv_margins.top = margin; 2225 } else if (!strncmp(option, "margin_bottom", delim - option)) { 2226 if (drm_mode_parse_cmdline_int(delim, &margin)) 2227 return -EINVAL; 2228 2229 mode->tv_margins.bottom = margin; 2230 } else if (!strncmp(option, "panel_orientation", delim - option)) { 2231 if (drm_mode_parse_panel_orientation(delim, mode)) 2232 return -EINVAL; 2233 } else if (!strncmp(option, "tv_mode", delim - option)) { 2234 if (drm_mode_parse_tv_mode(delim, mode)) 2235 return -EINVAL; 2236 } else { 2237 return -EINVAL; 2238 } 2239 sep = strchr(delim, ','); 2240 option = sep + 1; 2241 } while (sep); 2242 2243 if (rotation && freestanding) 2244 return -EINVAL; 2245 2246 if (!(rotation & DRM_MODE_ROTATE_MASK)) 2247 rotation |= DRM_MODE_ROTATE_0; 2248 2249 /* Make sure there is exactly one rotation defined */ 2250 if (!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK)) 2251 return -EINVAL; 2252 2253 mode->rotation_reflection = rotation; 2254 2255 return 0; 2256 } 2257 2258 struct drm_named_mode { 2259 const char *name; 2260 unsigned int pixel_clock_khz; 2261 unsigned int xres; 2262 unsigned int yres; 2263 unsigned int flags; 2264 unsigned int tv_mode; 2265 }; 2266 2267 #define NAMED_MODE(_name, _pclk, _x, _y, _flags, _mode) \ 2268 { \ 2269 .name = _name, \ 2270 .pixel_clock_khz = _pclk, \ 2271 .xres = _x, \ 2272 .yres = _y, \ 2273 .flags = _flags, \ 2274 .tv_mode = _mode, \ 2275 } 2276 2277 static const struct drm_named_mode drm_named_modes[] = { 2278 NAMED_MODE("NTSC", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_NTSC), 2279 NAMED_MODE("NTSC-J", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_NTSC_J), 2280 NAMED_MODE("PAL", 13500, 720, 576, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_PAL), 2281 NAMED_MODE("PAL-M", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_PAL_M), 2282 }; 2283 2284 static int drm_mode_parse_cmdline_named_mode(const char *name, 2285 unsigned int name_end, 2286 struct drm_cmdline_mode *cmdline_mode) 2287 { 2288 unsigned int i; 2289 2290 if (!name_end) 2291 return 0; 2292 2293 /* If the name starts with a digit, it's not a named mode */ 2294 if (isdigit(name[0])) 2295 return 0; 2296 2297 /* 2298 * If there's an equal sign in the name, the command-line 2299 * contains only an option and no mode. 2300 */ 2301 if (strnchr(name, name_end, '=')) 2302 return 0; 2303 2304 /* The connection status extras can be set without a mode. */ 2305 if (name_end == 1 && 2306 (name[0] == 'd' || name[0] == 'D' || name[0] == 'e')) 2307 return 0; 2308 2309 /* 2310 * We're sure we're a named mode at this point, iterate over the 2311 * list of modes we're aware of. 2312 */ 2313 for (i = 0; i < ARRAY_SIZE(drm_named_modes); i++) { 2314 const struct drm_named_mode *mode = &drm_named_modes[i]; 2315 int ret; 2316 2317 ret = str_has_prefix(name, mode->name); 2318 if (ret != name_end) 2319 continue; 2320 2321 strscpy(cmdline_mode->name, mode->name, sizeof(cmdline_mode->name)); 2322 cmdline_mode->pixel_clock = mode->pixel_clock_khz; 2323 cmdline_mode->xres = mode->xres; 2324 cmdline_mode->yres = mode->yres; 2325 cmdline_mode->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 2326 cmdline_mode->tv_mode = mode->tv_mode; 2327 cmdline_mode->tv_mode_specified = true; 2328 cmdline_mode->specified = true; 2329 2330 return 1; 2331 } 2332 2333 return -EINVAL; 2334 } 2335 2336 /** 2337 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 2338 * @mode_option: optional per connector mode option 2339 * @connector: connector to parse modeline for 2340 * @mode: preallocated drm_cmdline_mode structure to fill out 2341 * 2342 * This parses @mode_option command line modeline for modes and options to 2343 * configure the connector. 2344 * 2345 * This uses the same parameters as the fb modedb.c, except for an extra 2346 * force-enable, force-enable-digital and force-disable bit at the end:: 2347 * 2348 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 2349 * 2350 * Additionals options can be provided following the mode, using a comma to 2351 * separate each option. Valid options can be found in 2352 * Documentation/fb/modedb.rst. 2353 * 2354 * The intermediate drm_cmdline_mode structure is required to store additional 2355 * options from the command line modline like the force-enable/disable flag. 2356 * 2357 * Returns: 2358 * True if a valid modeline has been parsed, false otherwise. 2359 */ 2360 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 2361 const struct drm_connector *connector, 2362 struct drm_cmdline_mode *mode) 2363 { 2364 const char *name; 2365 bool freestanding = false, parse_extras = false; 2366 unsigned int bpp_off = 0, refresh_off = 0, options_off = 0; 2367 unsigned int mode_end = 0; 2368 const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; 2369 const char *options_ptr = NULL; 2370 char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; 2371 int len, ret; 2372 2373 memset(mode, 0, sizeof(*mode)); 2374 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 2375 2376 if (!mode_option) 2377 return false; 2378 2379 name = mode_option; 2380 2381 /* Locate the start of named options */ 2382 options_ptr = strchr(name, ','); 2383 if (options_ptr) 2384 options_off = options_ptr - name; 2385 else 2386 options_off = strlen(name); 2387 2388 /* Try to locate the bpp and refresh specifiers, if any */ 2389 bpp_ptr = strnchr(name, options_off, '-'); 2390 while (bpp_ptr && !isdigit(bpp_ptr[1])) 2391 bpp_ptr = strnchr(bpp_ptr + 1, options_off, '-'); 2392 if (bpp_ptr) 2393 bpp_off = bpp_ptr - name; 2394 2395 refresh_ptr = strnchr(name, options_off, '@'); 2396 if (refresh_ptr) 2397 refresh_off = refresh_ptr - name; 2398 2399 /* Locate the end of the name / resolution, and parse it */ 2400 if (bpp_ptr) { 2401 mode_end = bpp_off; 2402 } else if (refresh_ptr) { 2403 mode_end = refresh_off; 2404 } else if (options_ptr) { 2405 mode_end = options_off; 2406 parse_extras = true; 2407 } else { 2408 mode_end = strlen(name); 2409 parse_extras = true; 2410 } 2411 2412 if (!mode_end) 2413 return false; 2414 2415 ret = drm_mode_parse_cmdline_named_mode(name, mode_end, mode); 2416 if (ret < 0) 2417 return false; 2418 2419 /* 2420 * Having a mode that starts by a letter (and thus is named) and 2421 * an at-sign (used to specify a refresh rate) is disallowed. 2422 */ 2423 if (ret && refresh_ptr) 2424 return false; 2425 2426 /* No named mode? Check for a normal mode argument, e.g. 1024x768 */ 2427 if (!mode->specified && isdigit(name[0])) { 2428 ret = drm_mode_parse_cmdline_res_mode(name, mode_end, 2429 parse_extras, 2430 connector, 2431 mode); 2432 if (ret) 2433 return false; 2434 2435 mode->specified = true; 2436 } 2437 2438 /* No mode? Check for freestanding extras and/or options */ 2439 if (!mode->specified) { 2440 unsigned int len = strlen(mode_option); 2441 2442 if (bpp_ptr || refresh_ptr) 2443 return false; /* syntax error */ 2444 2445 if (len == 1 || (len >= 2 && mode_option[1] == ',')) 2446 extra_ptr = mode_option; 2447 else 2448 options_ptr = mode_option - 1; 2449 2450 freestanding = true; 2451 } 2452 2453 if (bpp_ptr) { 2454 ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); 2455 if (ret) 2456 return false; 2457 2458 mode->bpp_specified = true; 2459 } 2460 2461 if (refresh_ptr) { 2462 ret = drm_mode_parse_cmdline_refresh(refresh_ptr, 2463 &refresh_end_ptr, mode); 2464 if (ret) 2465 return false; 2466 2467 mode->refresh_specified = true; 2468 } 2469 2470 /* 2471 * Locate the end of the bpp / refresh, and parse the extras 2472 * if relevant 2473 */ 2474 if (bpp_ptr && refresh_ptr) 2475 extra_ptr = max(bpp_end_ptr, refresh_end_ptr); 2476 else if (bpp_ptr) 2477 extra_ptr = bpp_end_ptr; 2478 else if (refresh_ptr) 2479 extra_ptr = refresh_end_ptr; 2480 2481 if (extra_ptr) { 2482 if (options_ptr) 2483 len = options_ptr - extra_ptr; 2484 else 2485 len = strlen(extra_ptr); 2486 2487 ret = drm_mode_parse_cmdline_extra(extra_ptr, len, freestanding, 2488 connector, mode); 2489 if (ret) 2490 return false; 2491 } 2492 2493 if (options_ptr) { 2494 ret = drm_mode_parse_cmdline_options(options_ptr + 1, 2495 freestanding, 2496 connector, mode); 2497 if (ret) 2498 return false; 2499 } 2500 2501 return true; 2502 } 2503 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 2504 2505 static struct drm_display_mode *drm_named_mode(struct drm_device *dev, 2506 struct drm_cmdline_mode *cmd) 2507 { 2508 unsigned int i; 2509 2510 for (i = 0; i < ARRAY_SIZE(drm_named_modes); i++) { 2511 const struct drm_named_mode *named_mode = &drm_named_modes[i]; 2512 2513 if (strcmp(cmd->name, named_mode->name)) 2514 continue; 2515 2516 if (!cmd->tv_mode_specified) 2517 continue; 2518 2519 return drm_analog_tv_mode(dev, 2520 named_mode->tv_mode, 2521 named_mode->pixel_clock_khz * 1000, 2522 named_mode->xres, 2523 named_mode->yres, 2524 named_mode->flags & DRM_MODE_FLAG_INTERLACE); 2525 } 2526 2527 return NULL; 2528 } 2529 2530 /** 2531 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 2532 * @dev: DRM device to create the new mode for 2533 * @cmd: input command line modeline 2534 * 2535 * Returns: 2536 * Pointer to converted mode on success, NULL on error. 2537 */ 2538 struct drm_display_mode * 2539 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 2540 struct drm_cmdline_mode *cmd) 2541 { 2542 struct drm_display_mode *mode; 2543 2544 if (cmd->xres == 0 || cmd->yres == 0) 2545 return NULL; 2546 2547 if (strlen(cmd->name)) 2548 mode = drm_named_mode(dev, cmd); 2549 else if (cmd->cvt) 2550 mode = drm_cvt_mode(dev, 2551 cmd->xres, cmd->yres, 2552 cmd->refresh_specified ? cmd->refresh : 60, 2553 cmd->rb, cmd->interlace, 2554 cmd->margins); 2555 else 2556 mode = drm_gtf_mode(dev, 2557 cmd->xres, cmd->yres, 2558 cmd->refresh_specified ? cmd->refresh : 60, 2559 cmd->interlace, 2560 cmd->margins); 2561 if (!mode) 2562 return NULL; 2563 2564 mode->type |= DRM_MODE_TYPE_USERDEF; 2565 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ 2566 if (cmd->xres == 1366) 2567 drm_mode_fixup_1366x768(mode); 2568 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2569 return mode; 2570 } 2571 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 2572 2573 /** 2574 * drm_mode_convert_to_umode - convert a drm_display_mode into a modeinfo 2575 * @out: drm_mode_modeinfo struct to return to the user 2576 * @in: drm_display_mode to use 2577 * 2578 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 2579 * the user. 2580 */ 2581 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 2582 const struct drm_display_mode *in) 2583 { 2584 out->clock = in->clock; 2585 out->hdisplay = in->hdisplay; 2586 out->hsync_start = in->hsync_start; 2587 out->hsync_end = in->hsync_end; 2588 out->htotal = in->htotal; 2589 out->hskew = in->hskew; 2590 out->vdisplay = in->vdisplay; 2591 out->vsync_start = in->vsync_start; 2592 out->vsync_end = in->vsync_end; 2593 out->vtotal = in->vtotal; 2594 out->vscan = in->vscan; 2595 out->vrefresh = drm_mode_vrefresh(in); 2596 out->flags = in->flags; 2597 out->type = in->type; 2598 2599 switch (in->picture_aspect_ratio) { 2600 case HDMI_PICTURE_ASPECT_4_3: 2601 out->flags |= DRM_MODE_FLAG_PIC_AR_4_3; 2602 break; 2603 case HDMI_PICTURE_ASPECT_16_9: 2604 out->flags |= DRM_MODE_FLAG_PIC_AR_16_9; 2605 break; 2606 case HDMI_PICTURE_ASPECT_64_27: 2607 out->flags |= DRM_MODE_FLAG_PIC_AR_64_27; 2608 break; 2609 case HDMI_PICTURE_ASPECT_256_135: 2610 out->flags |= DRM_MODE_FLAG_PIC_AR_256_135; 2611 break; 2612 default: 2613 WARN(1, "Invalid aspect ratio (0%x) on mode\n", 2614 in->picture_aspect_ratio); 2615 fallthrough; 2616 case HDMI_PICTURE_ASPECT_NONE: 2617 out->flags |= DRM_MODE_FLAG_PIC_AR_NONE; 2618 break; 2619 } 2620 2621 strscpy_pad(out->name, in->name, sizeof(out->name)); 2622 } 2623 2624 /** 2625 * drm_mode_convert_umode - convert a modeinfo into a drm_display_mode 2626 * @dev: drm device 2627 * @out: drm_display_mode to return to the user 2628 * @in: drm_mode_modeinfo to use 2629 * 2630 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 2631 * the caller. 2632 * 2633 * Returns: 2634 * Zero on success, negative errno on failure. 2635 */ 2636 int drm_mode_convert_umode(struct drm_device *dev, 2637 struct drm_display_mode *out, 2638 const struct drm_mode_modeinfo *in) 2639 { 2640 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 2641 return -ERANGE; 2642 2643 out->clock = in->clock; 2644 out->hdisplay = in->hdisplay; 2645 out->hsync_start = in->hsync_start; 2646 out->hsync_end = in->hsync_end; 2647 out->htotal = in->htotal; 2648 out->hskew = in->hskew; 2649 out->vdisplay = in->vdisplay; 2650 out->vsync_start = in->vsync_start; 2651 out->vsync_end = in->vsync_end; 2652 out->vtotal = in->vtotal; 2653 out->vscan = in->vscan; 2654 out->flags = in->flags; 2655 /* 2656 * Old xf86-video-vmware (possibly others too) used to 2657 * leave 'type' uninitialized. Just ignore any bits we 2658 * don't like. It's a just hint after all, and more 2659 * useful for the kernel->userspace direction anyway. 2660 */ 2661 out->type = in->type & DRM_MODE_TYPE_ALL; 2662 strscpy_pad(out->name, in->name, sizeof(out->name)); 2663 2664 /* Clearing picture aspect ratio bits from out flags, 2665 * as the aspect-ratio information is not stored in 2666 * flags for kernel-mode, but in picture_aspect_ratio. 2667 */ 2668 out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 2669 2670 switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) { 2671 case DRM_MODE_FLAG_PIC_AR_4_3: 2672 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3; 2673 break; 2674 case DRM_MODE_FLAG_PIC_AR_16_9: 2675 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9; 2676 break; 2677 case DRM_MODE_FLAG_PIC_AR_64_27: 2678 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27; 2679 break; 2680 case DRM_MODE_FLAG_PIC_AR_256_135: 2681 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135; 2682 break; 2683 case DRM_MODE_FLAG_PIC_AR_NONE: 2684 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE; 2685 break; 2686 default: 2687 return -EINVAL; 2688 } 2689 2690 out->status = drm_mode_validate_driver(dev, out); 2691 if (out->status != MODE_OK) 2692 return -EINVAL; 2693 2694 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 2695 2696 return 0; 2697 } 2698 2699 /** 2700 * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420 2701 * output format 2702 * 2703 * @display: display under action 2704 * @mode: video mode to be tested. 2705 * 2706 * Returns: 2707 * true if the mode can be supported in YCBCR420 format 2708 * false if not. 2709 */ 2710 bool drm_mode_is_420_only(const struct drm_display_info *display, 2711 const struct drm_display_mode *mode) 2712 { 2713 u8 vic = drm_match_cea_mode(mode); 2714 2715 return test_bit(vic, display->hdmi.y420_vdb_modes); 2716 } 2717 EXPORT_SYMBOL(drm_mode_is_420_only); 2718 2719 /** 2720 * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420 2721 * output format also (along with RGB/YCBCR444/422) 2722 * 2723 * @display: display under action. 2724 * @mode: video mode to be tested. 2725 * 2726 * Returns: 2727 * true if the mode can be support YCBCR420 format 2728 * false if not. 2729 */ 2730 bool drm_mode_is_420_also(const struct drm_display_info *display, 2731 const struct drm_display_mode *mode) 2732 { 2733 u8 vic = drm_match_cea_mode(mode); 2734 2735 return test_bit(vic, display->hdmi.y420_cmdb_modes); 2736 } 2737 EXPORT_SYMBOL(drm_mode_is_420_also); 2738 /** 2739 * drm_mode_is_420 - if a given videomode can be supported in YCBCR420 2740 * output format 2741 * 2742 * @display: display under action. 2743 * @mode: video mode to be tested. 2744 * 2745 * Returns: 2746 * true if the mode can be supported in YCBCR420 format 2747 * false if not. 2748 */ 2749 bool drm_mode_is_420(const struct drm_display_info *display, 2750 const struct drm_display_mode *mode) 2751 { 2752 return drm_mode_is_420_only(display, mode) || 2753 drm_mode_is_420_also(display, mode); 2754 } 2755 EXPORT_SYMBOL(drm_mode_is_420); 2756 2757 /** 2758 * drm_set_preferred_mode - Sets the preferred mode of a connector 2759 * @connector: connector whose mode list should be processed 2760 * @hpref: horizontal resolution of preferred mode 2761 * @vpref: vertical resolution of preferred mode 2762 * 2763 * Marks a mode as preferred if it matches the resolution specified by @hpref 2764 * and @vpref. 2765 */ 2766 void drm_set_preferred_mode(struct drm_connector *connector, 2767 int hpref, int vpref) 2768 { 2769 struct drm_display_mode *mode; 2770 2771 list_for_each_entry(mode, &connector->probed_modes, head) { 2772 if (mode->hdisplay == hpref && 2773 mode->vdisplay == vpref) 2774 mode->type |= DRM_MODE_TYPE_PREFERRED; 2775 } 2776 } 2777 EXPORT_SYMBOL(drm_set_preferred_mode); 2778