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/list.h> 35#include <linux/list_sort.h> 36#include <linux/export.h> 37 38#include <video/of_videomode.h> 39#include <video/videomode.h> 40 41#include <drm/drm_crtc.h> 42#include <drm/drm_device.h> 43#include <drm/drm_modes.h> 44#include <drm/drm_print.h> 45 46#include "drm_crtc_internal.h" 47 48/** 49 * drm_mode_debug_printmodeline - print a mode to dmesg 50 * @mode: mode to print 51 * 52 * Describe @mode using DRM_DEBUG. 53 */ 54void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) 55{ 56 DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 57} 58EXPORT_SYMBOL(drm_mode_debug_printmodeline); 59 60/** 61 * drm_mode_create - create a new display mode 62 * @dev: DRM device 63 * 64 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it 65 * and return it. 66 * 67 * Returns: 68 * Pointer to new mode on success, NULL on error. 69 */ 70struct drm_display_mode *drm_mode_create(struct drm_device *dev) 71{ 72 struct drm_display_mode *nmode; 73 74 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); 75 if (!nmode) 76 return NULL; 77 78 return nmode; 79} 80EXPORT_SYMBOL(drm_mode_create); 81 82/** 83 * drm_mode_destroy - remove a mode 84 * @dev: DRM device 85 * @mode: mode to remove 86 * 87 * Release @mode's unique ID, then free it @mode structure itself using kfree. 88 */ 89void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) 90{ 91 if (!mode) 92 return; 93 94 kfree(mode); 95} 96EXPORT_SYMBOL(drm_mode_destroy); 97 98/** 99 * drm_mode_probed_add - add a mode to a connector's probed_mode list 100 * @connector: connector the new mode 101 * @mode: mode data 102 * 103 * Add @mode to @connector's probed_mode list for later use. This list should 104 * then in a second step get filtered and all the modes actually supported by 105 * the hardware moved to the @connector's modes list. 106 */ 107void drm_mode_probed_add(struct drm_connector *connector, 108 struct drm_display_mode *mode) 109{ 110 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 111 112 list_add_tail(&mode->head, &connector->probed_modes); 113} 114EXPORT_SYMBOL(drm_mode_probed_add); 115 116/** 117 * drm_cvt_mode -create a modeline based on the CVT algorithm 118 * @dev: drm device 119 * @hdisplay: hdisplay size 120 * @vdisplay: vdisplay size 121 * @vrefresh: vrefresh rate 122 * @reduced: whether to use reduced blanking 123 * @interlaced: whether to compute an interlaced mode 124 * @margins: whether to add margins (borders) 125 * 126 * This function is called to generate the modeline based on CVT algorithm 127 * according to the hdisplay, vdisplay, vrefresh. 128 * It is based from the VESA(TM) Coordinated Video Timing Generator by 129 * Graham Loveridge April 9, 2003 available at 130 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 131 * 132 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 133 * What I have done is to translate it by using integer calculation. 134 * 135 * Returns: 136 * The modeline based on the CVT algorithm stored in a drm_display_mode object. 137 * The display mode object is allocated with drm_mode_create(). Returns NULL 138 * when no mode could be allocated. 139 */ 140struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 141 int vdisplay, int vrefresh, 142 bool reduced, bool interlaced, bool margins) 143{ 144#define HV_FACTOR 1000 145 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 146#define CVT_MARGIN_PERCENTAGE 18 147 /* 2) character cell horizontal granularity (pixels) - default 8 */ 148#define CVT_H_GRANULARITY 8 149 /* 3) Minimum vertical porch (lines) - default 3 */ 150#define CVT_MIN_V_PORCH 3 151 /* 4) Minimum number of vertical back porch lines - default 6 */ 152#define CVT_MIN_V_BPORCH 6 153 /* Pixel Clock step (kHz) */ 154#define CVT_CLOCK_STEP 250 155 struct drm_display_mode *drm_mode; 156 unsigned int vfieldrate, hperiod; 157 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 158 int interlace; 159 u64 tmp; 160 161 if (!hdisplay || !vdisplay) 162 return NULL; 163 164 /* allocate the drm_display_mode structure. If failure, we will 165 * return directly 166 */ 167 drm_mode = drm_mode_create(dev); 168 if (!drm_mode) 169 return NULL; 170 171 /* the CVT default refresh rate is 60Hz */ 172 if (!vrefresh) 173 vrefresh = 60; 174 175 /* the required field fresh rate */ 176 if (interlaced) 177 vfieldrate = vrefresh * 2; 178 else 179 vfieldrate = vrefresh; 180 181 /* horizontal pixels */ 182 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 183 184 /* determine the left&right borders */ 185 hmargin = 0; 186 if (margins) { 187 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 188 hmargin -= hmargin % CVT_H_GRANULARITY; 189 } 190 /* find the total active pixels */ 191 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 192 193 /* find the number of lines per field */ 194 if (interlaced) 195 vdisplay_rnd = vdisplay / 2; 196 else 197 vdisplay_rnd = vdisplay; 198 199 /* find the top & bottom borders */ 200 vmargin = 0; 201 if (margins) 202 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 203 204 drm_mode->vdisplay = vdisplay + 2 * vmargin; 205 206 /* Interlaced */ 207 if (interlaced) 208 interlace = 1; 209 else 210 interlace = 0; 211 212 /* Determine VSync Width from aspect ratio */ 213 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 214 vsync = 4; 215 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 216 vsync = 5; 217 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 218 vsync = 6; 219 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 220 vsync = 7; 221 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 222 vsync = 7; 223 else /* custom */ 224 vsync = 10; 225 226 if (!reduced) { 227 /* simplify the GTF calculation */ 228 /* 4) Minimum time of vertical sync + back porch interval (µs) 229 * default 550.0 230 */ 231 int tmp1, tmp2; 232#define CVT_MIN_VSYNC_BP 550 233 /* 3) Nominal HSync width (% of line period) - default 8 */ 234#define CVT_HSYNC_PERCENTAGE 8 235 unsigned int hblank_percentage; 236 int vsyncandback_porch, __maybe_unused vback_porch, hblank; 237 238 /* estimated the horizontal period */ 239 tmp1 = HV_FACTOR * 1000000 - 240 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 241 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 242 interlace; 243 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 244 245 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 246 /* 9. Find number of lines in sync + backporch */ 247 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 248 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 249 else 250 vsyncandback_porch = tmp1; 251 /* 10. Find number of lines in back porch */ 252 vback_porch = vsyncandback_porch - vsync; 253 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 254 vsyncandback_porch + CVT_MIN_V_PORCH; 255 /* 5) Definition of Horizontal blanking time limitation */ 256 /* Gradient (%/kHz) - default 600 */ 257#define CVT_M_FACTOR 600 258 /* Offset (%) - default 40 */ 259#define CVT_C_FACTOR 40 260 /* Blanking time scaling factor - default 128 */ 261#define CVT_K_FACTOR 128 262 /* Scaling factor weighting - default 20 */ 263#define CVT_J_FACTOR 20 264#define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 265#define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 266 CVT_J_FACTOR) 267 /* 12. Find ideal blanking duty cycle from formula */ 268 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 269 hperiod / 1000; 270 /* 13. Blanking time */ 271 if (hblank_percentage < 20 * HV_FACTOR) 272 hblank_percentage = 20 * HV_FACTOR; 273 hblank = drm_mode->hdisplay * hblank_percentage / 274 (100 * HV_FACTOR - hblank_percentage); 275 hblank -= hblank % (2 * CVT_H_GRANULARITY); 276 /* 14. find the total pixels per line */ 277 drm_mode->htotal = drm_mode->hdisplay + hblank; 278 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 279 drm_mode->hsync_start = drm_mode->hsync_end - 280 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 281 drm_mode->hsync_start += CVT_H_GRANULARITY - 282 drm_mode->hsync_start % CVT_H_GRANULARITY; 283 /* fill the Vsync values */ 284 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 285 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 286 } else { 287 /* Reduced blanking */ 288 /* Minimum vertical blanking interval time (µs)- default 460 */ 289#define CVT_RB_MIN_VBLANK 460 290 /* Fixed number of clocks for horizontal sync */ 291#define CVT_RB_H_SYNC 32 292 /* Fixed number of clocks for horizontal blanking */ 293#define CVT_RB_H_BLANK 160 294 /* Fixed number of lines for vertical front porch - default 3*/ 295#define CVT_RB_VFPORCH 3 296 int vbilines; 297 int tmp1, tmp2; 298 /* 8. Estimate Horizontal period. */ 299 tmp1 = HV_FACTOR * 1000000 - 300 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 301 tmp2 = vdisplay_rnd + 2 * vmargin; 302 hperiod = tmp1 / (tmp2 * vfieldrate); 303 /* 9. Find number of lines in vertical blanking */ 304 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 305 /* 10. Check if vertical blanking is sufficient */ 306 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 307 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 308 /* 11. Find total number of lines in vertical field */ 309 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 310 /* 12. Find total number of pixels in a line */ 311 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 312 /* Fill in HSync values */ 313 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 314 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 315 /* Fill in VSync values */ 316 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 317 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 318 } 319 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 320 tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */ 321 tmp *= HV_FACTOR * 1000; 322 do_div(tmp, hperiod); 323 tmp -= drm_mode->clock % CVT_CLOCK_STEP; 324 drm_mode->clock = tmp; 325 /* 18/16. Find actual vertical frame frequency */ 326 /* ignore - just set the mode flag for interlaced */ 327 if (interlaced) { 328 drm_mode->vtotal *= 2; 329 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 330 } 331 /* Fill the mode line name */ 332 drm_mode_set_name(drm_mode); 333 if (reduced) 334 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 335 DRM_MODE_FLAG_NVSYNC); 336 else 337 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 338 DRM_MODE_FLAG_NHSYNC); 339 340 return drm_mode; 341} 342EXPORT_SYMBOL(drm_cvt_mode); 343 344/** 345 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm 346 * @dev: drm device 347 * @hdisplay: hdisplay size 348 * @vdisplay: vdisplay size 349 * @vrefresh: vrefresh rate. 350 * @interlaced: whether to compute an interlaced mode 351 * @margins: desired margin (borders) size 352 * @GTF_M: extended GTF formula parameters 353 * @GTF_2C: extended GTF formula parameters 354 * @GTF_K: extended GTF formula parameters 355 * @GTF_2J: extended GTF formula parameters 356 * 357 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 358 * in here multiplied by two. For a C of 40, pass in 80. 359 * 360 * Returns: 361 * The modeline based on the full GTF algorithm stored in a drm_display_mode object. 362 * The display mode object is allocated with drm_mode_create(). Returns NULL 363 * when no mode could be allocated. 364 */ 365struct drm_display_mode * 366drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 367 int vrefresh, bool interlaced, int margins, 368 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 369{ /* 1) top/bottom margin size (% of height) - default: 1.8, */ 370#define GTF_MARGIN_PERCENTAGE 18 371 /* 2) character cell horizontal granularity (pixels) - default 8 */ 372#define GTF_CELL_GRAN 8 373 /* 3) Minimum vertical porch (lines) - default 3 */ 374#define GTF_MIN_V_PORCH 1 375 /* width of vsync in lines */ 376#define V_SYNC_RQD 3 377 /* width of hsync as % of total line */ 378#define H_SYNC_PERCENT 8 379 /* min time of vsync + back porch (microsec) */ 380#define MIN_VSYNC_PLUS_BP 550 381 /* C' and M' are part of the Blanking Duty Cycle computation */ 382#define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 383#define GTF_M_PRIME (GTF_K * GTF_M / 256) 384 struct drm_display_mode *drm_mode; 385 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 386 int top_margin, bottom_margin; 387 int interlace; 388 unsigned int hfreq_est; 389 int vsync_plus_bp, __maybe_unused vback_porch; 390 unsigned int vtotal_lines, __maybe_unused vfieldrate_est; 391 unsigned int __maybe_unused hperiod; 392 unsigned int vfield_rate, __maybe_unused vframe_rate; 393 int left_margin, right_margin; 394 unsigned int total_active_pixels, ideal_duty_cycle; 395 unsigned int hblank, total_pixels, pixel_freq; 396 int hsync, hfront_porch, vodd_front_porch_lines; 397 unsigned int tmp1, tmp2; 398 399 if (!hdisplay || !vdisplay) 400 return NULL; 401 402 drm_mode = drm_mode_create(dev); 403 if (!drm_mode) 404 return NULL; 405 406 /* 1. In order to give correct results, the number of horizontal 407 * pixels requested is first processed to ensure that it is divisible 408 * by the character size, by rounding it to the nearest character 409 * cell boundary: 410 */ 411 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 412 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 413 414 /* 2. If interlace is requested, the number of vertical lines assumed 415 * by the calculation must be halved, as the computation calculates 416 * the number of vertical lines per field. 417 */ 418 if (interlaced) 419 vdisplay_rnd = vdisplay / 2; 420 else 421 vdisplay_rnd = vdisplay; 422 423 /* 3. Find the frame rate required: */ 424 if (interlaced) 425 vfieldrate_rqd = vrefresh * 2; 426 else 427 vfieldrate_rqd = vrefresh; 428 429 /* 4. Find number of lines in Top margin: */ 430 top_margin = 0; 431 if (margins) 432 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 433 1000; 434 /* 5. Find number of lines in bottom margin: */ 435 bottom_margin = top_margin; 436 437 /* 6. If interlace is required, then set variable interlace: */ 438 if (interlaced) 439 interlace = 1; 440 else 441 interlace = 0; 442 443 /* 7. Estimate the Horizontal frequency */ 444 { 445 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 446 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 447 2 + interlace; 448 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 449 } 450 451 /* 8. Find the number of lines in V sync + back porch */ 452 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 453 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 454 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 455 /* 9. Find the number of lines in V back porch alone: */ 456 vback_porch = vsync_plus_bp - V_SYNC_RQD; 457 /* 10. Find the total number of lines in Vertical field period: */ 458 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 459 vsync_plus_bp + GTF_MIN_V_PORCH; 460 /* 11. Estimate the Vertical field frequency: */ 461 vfieldrate_est = hfreq_est / vtotal_lines; 462 /* 12. Find the actual horizontal period: */ 463 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 464 465 /* 13. Find the actual Vertical field frequency: */ 466 vfield_rate = hfreq_est / vtotal_lines; 467 /* 14. Find the Vertical frame frequency: */ 468 if (interlaced) 469 vframe_rate = vfield_rate / 2; 470 else 471 vframe_rate = vfield_rate; 472 /* 15. Find number of pixels in left margin: */ 473 if (margins) 474 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 475 1000; 476 else 477 left_margin = 0; 478 479 /* 16.Find number of pixels in right margin: */ 480 right_margin = left_margin; 481 /* 17.Find total number of active pixels in image and left and right */ 482 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 483 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 484 ideal_duty_cycle = GTF_C_PRIME * 1000 - 485 (GTF_M_PRIME * 1000000 / hfreq_est); 486 /* 19.Find the number of pixels in the blanking time to the nearest 487 * double character cell: */ 488 hblank = total_active_pixels * ideal_duty_cycle / 489 (100000 - ideal_duty_cycle); 490 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 491 hblank = hblank * 2 * GTF_CELL_GRAN; 492 /* 20.Find total number of pixels: */ 493 total_pixels = total_active_pixels + hblank; 494 /* 21.Find pixel clock frequency: */ 495 pixel_freq = total_pixels * hfreq_est / 1000; 496 /* Stage 1 computations are now complete; I should really pass 497 * the results to another function and do the Stage 2 computations, 498 * but I only need a few more values so I'll just append the 499 * computations here for now */ 500 /* 17. Find the number of pixels in the horizontal sync period: */ 501 hsync = H_SYNC_PERCENT * total_pixels / 100; 502 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 503 hsync = hsync * GTF_CELL_GRAN; 504 /* 18. Find the number of pixels in horizontal front porch period */ 505 hfront_porch = hblank / 2 - hsync; 506 /* 36. Find the number of lines in the odd front porch period: */ 507 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 508 509 /* finally, pack the results in the mode struct */ 510 drm_mode->hdisplay = hdisplay_rnd; 511 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 512 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 513 drm_mode->htotal = total_pixels; 514 drm_mode->vdisplay = vdisplay_rnd; 515 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 516 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 517 drm_mode->vtotal = vtotal_lines; 518 519 drm_mode->clock = pixel_freq; 520 521 if (interlaced) { 522 drm_mode->vtotal *= 2; 523 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 524 } 525 526 drm_mode_set_name(drm_mode); 527 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 528 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 529 else 530 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 531 532 return drm_mode; 533} 534EXPORT_SYMBOL(drm_gtf_mode_complex); 535 536/** 537 * drm_gtf_mode - create the modeline based on the GTF algorithm 538 * @dev: drm device 539 * @hdisplay: hdisplay size 540 * @vdisplay: vdisplay size 541 * @vrefresh: vrefresh rate. 542 * @interlaced: whether to compute an interlaced mode 543 * @margins: desired margin (borders) size 544 * 545 * return the modeline based on GTF algorithm 546 * 547 * This function is to create the modeline based on the GTF algorithm. 548 * Generalized Timing Formula is derived from: 549 * 550 * GTF Spreadsheet by Andy Morrish (1/5/97) 551 * available at https://www.vesa.org 552 * 553 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 554 * What I have done is to translate it by using integer calculation. 555 * I also refer to the function of fb_get_mode in the file of 556 * drivers/video/fbmon.c 557 * 558 * Standard GTF parameters:: 559 * 560 * M = 600 561 * C = 40 562 * K = 128 563 * J = 20 564 * 565 * Returns: 566 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 567 * The display mode object is allocated with drm_mode_create(). Returns NULL 568 * when no mode could be allocated. 569 */ 570struct drm_display_mode * 571drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 572 bool interlaced, int margins) 573{ 574 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 575 interlaced, margins, 576 600, 40 * 2, 128, 20 * 2); 577} 578EXPORT_SYMBOL(drm_gtf_mode); 579 580#ifdef CONFIG_VIDEOMODE_HELPERS 581/** 582 * drm_display_mode_from_videomode - fill in @dmode using @vm, 583 * @vm: videomode structure to use as source 584 * @dmode: drm_display_mode structure to use as destination 585 * 586 * Fills out @dmode using the display mode specified in @vm. 587 */ 588void drm_display_mode_from_videomode(const struct videomode *vm, 589 struct drm_display_mode *dmode) 590{ 591 dmode->hdisplay = vm->hactive; 592 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 593 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 594 dmode->htotal = dmode->hsync_end + vm->hback_porch; 595 596 dmode->vdisplay = vm->vactive; 597 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 598 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 599 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 600 601 dmode->clock = vm->pixelclock / 1000; 602 603 dmode->flags = 0; 604 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 605 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 606 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 607 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 608 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 609 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 610 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 611 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 612 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 613 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 614 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 615 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 616 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 617 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 618 drm_mode_set_name(dmode); 619} 620EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 621 622/** 623 * drm_display_mode_to_videomode - fill in @vm using @dmode, 624 * @dmode: drm_display_mode structure to use as source 625 * @vm: videomode structure to use as destination 626 * 627 * Fills out @vm using the display mode specified in @dmode. 628 */ 629void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 630 struct videomode *vm) 631{ 632 vm->hactive = dmode->hdisplay; 633 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 634 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 635 vm->hback_porch = dmode->htotal - dmode->hsync_end; 636 637 vm->vactive = dmode->vdisplay; 638 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 639 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 640 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 641 642 vm->pixelclock = dmode->clock * 1000; 643 644 vm->flags = 0; 645 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 646 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 647 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 648 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 649 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 650 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 651 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 652 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 653 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 654 vm->flags |= DISPLAY_FLAGS_INTERLACED; 655 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 656 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 657 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 658 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 659} 660EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 661 662/** 663 * drm_bus_flags_from_videomode - extract information about pixelclk and 664 * DE polarity from videomode and store it in a separate variable 665 * @vm: videomode structure to use 666 * @bus_flags: information about pixelclk, sync and DE polarity will be stored 667 * here 668 * 669 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH), DRM_BUS_FLAG_PIXDATA_DRIVE_(POS|NEG)EDGE 670 * and DISPLAY_FLAGS_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS 671 * found in @vm 672 */ 673void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) 674{ 675 *bus_flags = 0; 676 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) 677 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE; 678 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 679 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; 680 681 if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE) 682 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE; 683 if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE) 684 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE; 685 686 if (vm->flags & DISPLAY_FLAGS_DE_LOW) 687 *bus_flags |= DRM_BUS_FLAG_DE_LOW; 688 if (vm->flags & DISPLAY_FLAGS_DE_HIGH) 689 *bus_flags |= DRM_BUS_FLAG_DE_HIGH; 690} 691EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); 692 693#ifdef CONFIG_OF 694/** 695 * of_get_drm_display_mode - get a drm_display_mode from devicetree 696 * @np: device_node with the timing specification 697 * @dmode: will be set to the return value 698 * @bus_flags: information about pixelclk, sync and DE polarity 699 * @index: index into the list of display timings in devicetree 700 * 701 * This function is expensive and should only be used, if only one mode is to be 702 * read from DT. To get multiple modes start with of_get_display_timings and 703 * work with that instead. 704 * 705 * Returns: 706 * 0 on success, a negative errno code when no of videomode node was found. 707 */ 708int of_get_drm_display_mode(struct device_node *np, 709 struct drm_display_mode *dmode, u32 *bus_flags, 710 int index) 711{ 712 struct videomode vm; 713 int ret; 714 715 ret = of_get_videomode(np, &vm, index); 716 if (ret) 717 return ret; 718 719 drm_display_mode_from_videomode(&vm, dmode); 720 if (bus_flags) 721 drm_bus_flags_from_videomode(&vm, bus_flags); 722 723 pr_debug("%pOF: got %dx%d display mode\n", 724 np, vm.hactive, vm.vactive); 725 drm_mode_debug_printmodeline(dmode); 726 727 return 0; 728} 729EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 730#endif /* CONFIG_OF */ 731#endif /* CONFIG_VIDEOMODE_HELPERS */ 732 733/** 734 * drm_mode_set_name - set the name on a mode 735 * @mode: name will be set in this mode 736 * 737 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 738 * with an optional 'i' suffix for interlaced modes. 739 */ 740void drm_mode_set_name(struct drm_display_mode *mode) 741{ 742 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 743 744 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 745 mode->hdisplay, mode->vdisplay, 746 interlaced ? "i" : ""); 747} 748EXPORT_SYMBOL(drm_mode_set_name); 749 750/** 751 * drm_mode_vrefresh - get the vrefresh of a mode 752 * @mode: mode 753 * 754 * Returns: 755 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 756 * value first if it is not yet set. 757 */ 758int drm_mode_vrefresh(const struct drm_display_mode *mode) 759{ 760 unsigned int num, den; 761 762 if (mode->htotal == 0 || mode->vtotal == 0) 763 return 0; 764 765 num = mode->clock; 766 den = mode->htotal * mode->vtotal; 767 768 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 769 num *= 2; 770 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 771 den *= 2; 772 if (mode->vscan > 1) 773 den *= mode->vscan; 774 775 return DIV_ROUND_CLOSEST_ULL(mul_u32_u32(num, 1000), den); 776} 777EXPORT_SYMBOL(drm_mode_vrefresh); 778 779/** 780 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode 781 * @mode: mode to query 782 * @hdisplay: hdisplay value to fill in 783 * @vdisplay: vdisplay value to fill in 784 * 785 * The vdisplay value will be doubled if the specified mode is a stereo mode of 786 * the appropriate layout. 787 */ 788void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 789 int *hdisplay, int *vdisplay) 790{ 791 struct drm_display_mode adjusted = *mode; 792 793 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 794 *hdisplay = adjusted.crtc_hdisplay; 795 *vdisplay = adjusted.crtc_vdisplay; 796} 797EXPORT_SYMBOL(drm_mode_get_hv_timing); 798 799/** 800 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 801 * @p: mode 802 * @adjust_flags: a combination of adjustment flags 803 * 804 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 805 * 806 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 807 * interlaced modes. 808 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 809 * buffers containing two eyes (only adjust the timings when needed, eg. for 810 * "frame packing" or "side by side full"). 811 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 812 * be performed for doublescan and vscan > 1 modes respectively. 813 */ 814void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 815{ 816 if (!p) 817 return; 818 819 p->crtc_clock = p->clock; 820 p->crtc_hdisplay = p->hdisplay; 821 p->crtc_hsync_start = p->hsync_start; 822 p->crtc_hsync_end = p->hsync_end; 823 p->crtc_htotal = p->htotal; 824 p->crtc_hskew = p->hskew; 825 p->crtc_vdisplay = p->vdisplay; 826 p->crtc_vsync_start = p->vsync_start; 827 p->crtc_vsync_end = p->vsync_end; 828 p->crtc_vtotal = p->vtotal; 829 830 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 831 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 832 p->crtc_vdisplay /= 2; 833 p->crtc_vsync_start /= 2; 834 p->crtc_vsync_end /= 2; 835 p->crtc_vtotal /= 2; 836 } 837 } 838 839 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 840 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 841 p->crtc_vdisplay *= 2; 842 p->crtc_vsync_start *= 2; 843 p->crtc_vsync_end *= 2; 844 p->crtc_vtotal *= 2; 845 } 846 } 847 848 if (!(adjust_flags & CRTC_NO_VSCAN)) { 849 if (p->vscan > 1) { 850 p->crtc_vdisplay *= p->vscan; 851 p->crtc_vsync_start *= p->vscan; 852 p->crtc_vsync_end *= p->vscan; 853 p->crtc_vtotal *= p->vscan; 854 } 855 } 856 857 if (adjust_flags & CRTC_STEREO_DOUBLE) { 858 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 859 860 switch (layout) { 861 case DRM_MODE_FLAG_3D_FRAME_PACKING: 862 p->crtc_clock *= 2; 863 p->crtc_vdisplay += p->crtc_vtotal; 864 p->crtc_vsync_start += p->crtc_vtotal; 865 p->crtc_vsync_end += p->crtc_vtotal; 866 p->crtc_vtotal += p->crtc_vtotal; 867 break; 868 } 869 } 870 871 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 872 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 873 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 874 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 875} 876EXPORT_SYMBOL(drm_mode_set_crtcinfo); 877 878/** 879 * drm_mode_copy - copy the mode 880 * @dst: mode to overwrite 881 * @src: mode to copy 882 * 883 * Copy an existing mode into another mode, preserving the object id and 884 * list head of the destination mode. 885 */ 886void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 887{ 888 struct list_head head = dst->head; 889 890 *dst = *src; 891 dst->head = head; 892} 893EXPORT_SYMBOL(drm_mode_copy); 894 895/** 896 * drm_mode_duplicate - allocate and duplicate an existing mode 897 * @dev: drm_device to allocate the duplicated mode for 898 * @mode: mode to duplicate 899 * 900 * Just allocate a new mode, copy the existing mode into it, and return 901 * a pointer to it. Used to create new instances of established modes. 902 * 903 * Returns: 904 * Pointer to duplicated mode on success, NULL on error. 905 */ 906struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 907 const struct drm_display_mode *mode) 908{ 909 struct drm_display_mode *nmode; 910 911 nmode = drm_mode_create(dev); 912 if (!nmode) 913 return NULL; 914 915 drm_mode_copy(nmode, mode); 916 917 return nmode; 918} 919EXPORT_SYMBOL(drm_mode_duplicate); 920 921static bool drm_mode_match_timings(const struct drm_display_mode *mode1, 922 const struct drm_display_mode *mode2) 923{ 924 return mode1->hdisplay == mode2->hdisplay && 925 mode1->hsync_start == mode2->hsync_start && 926 mode1->hsync_end == mode2->hsync_end && 927 mode1->htotal == mode2->htotal && 928 mode1->hskew == mode2->hskew && 929 mode1->vdisplay == mode2->vdisplay && 930 mode1->vsync_start == mode2->vsync_start && 931 mode1->vsync_end == mode2->vsync_end && 932 mode1->vtotal == mode2->vtotal && 933 mode1->vscan == mode2->vscan; 934} 935 936static bool drm_mode_match_clock(const struct drm_display_mode *mode1, 937 const struct drm_display_mode *mode2) 938{ 939 /* 940 * do clock check convert to PICOS 941 * so fb modes get matched the same 942 */ 943 if (mode1->clock && mode2->clock) 944 return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock); 945 else 946 return mode1->clock == mode2->clock; 947} 948 949static bool drm_mode_match_flags(const struct drm_display_mode *mode1, 950 const struct drm_display_mode *mode2) 951{ 952 return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 953 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK); 954} 955 956static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1, 957 const struct drm_display_mode *mode2) 958{ 959 return (mode1->flags & DRM_MODE_FLAG_3D_MASK) == 960 (mode2->flags & DRM_MODE_FLAG_3D_MASK); 961} 962 963static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1, 964 const struct drm_display_mode *mode2) 965{ 966 return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio; 967} 968 969/** 970 * drm_mode_match - test modes for (partial) equality 971 * @mode1: first mode 972 * @mode2: second mode 973 * @match_flags: which parts need to match (DRM_MODE_MATCH_*) 974 * 975 * Check to see if @mode1 and @mode2 are equivalent. 976 * 977 * Returns: 978 * True if the modes are (partially) equal, false otherwise. 979 */ 980bool drm_mode_match(const struct drm_display_mode *mode1, 981 const struct drm_display_mode *mode2, 982 unsigned int match_flags) 983{ 984 if (!mode1 && !mode2) 985 return true; 986 987 if (!mode1 || !mode2) 988 return false; 989 990 if (match_flags & DRM_MODE_MATCH_TIMINGS && 991 !drm_mode_match_timings(mode1, mode2)) 992 return false; 993 994 if (match_flags & DRM_MODE_MATCH_CLOCK && 995 !drm_mode_match_clock(mode1, mode2)) 996 return false; 997 998 if (match_flags & DRM_MODE_MATCH_FLAGS && 999 !drm_mode_match_flags(mode1, mode2)) 1000 return false; 1001 1002 if (match_flags & DRM_MODE_MATCH_3D_FLAGS && 1003 !drm_mode_match_3d_flags(mode1, mode2)) 1004 return false; 1005 1006 if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO && 1007 !drm_mode_match_aspect_ratio(mode1, mode2)) 1008 return false; 1009 1010 return true; 1011} 1012EXPORT_SYMBOL(drm_mode_match); 1013 1014/** 1015 * drm_mode_equal - test modes for equality 1016 * @mode1: first mode 1017 * @mode2: second mode 1018 * 1019 * Check to see if @mode1 and @mode2 are equivalent. 1020 * 1021 * Returns: 1022 * True if the modes are equal, false otherwise. 1023 */ 1024bool drm_mode_equal(const struct drm_display_mode *mode1, 1025 const struct drm_display_mode *mode2) 1026{ 1027 return drm_mode_match(mode1, mode2, 1028 DRM_MODE_MATCH_TIMINGS | 1029 DRM_MODE_MATCH_CLOCK | 1030 DRM_MODE_MATCH_FLAGS | 1031 DRM_MODE_MATCH_3D_FLAGS| 1032 DRM_MODE_MATCH_ASPECT_RATIO); 1033} 1034EXPORT_SYMBOL(drm_mode_equal); 1035 1036/** 1037 * drm_mode_equal_no_clocks - test modes for equality 1038 * @mode1: first mode 1039 * @mode2: second mode 1040 * 1041 * Check to see if @mode1 and @mode2 are equivalent, but 1042 * don't check the pixel clocks. 1043 * 1044 * Returns: 1045 * True if the modes are equal, false otherwise. 1046 */ 1047bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, 1048 const struct drm_display_mode *mode2) 1049{ 1050 return drm_mode_match(mode1, mode2, 1051 DRM_MODE_MATCH_TIMINGS | 1052 DRM_MODE_MATCH_FLAGS | 1053 DRM_MODE_MATCH_3D_FLAGS); 1054} 1055EXPORT_SYMBOL(drm_mode_equal_no_clocks); 1056 1057/** 1058 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 1059 * @mode1: first mode 1060 * @mode2: second mode 1061 * 1062 * Check to see if @mode1 and @mode2 are equivalent, but 1063 * don't check the pixel clocks nor the stereo layout. 1064 * 1065 * Returns: 1066 * True if the modes are equal, false otherwise. 1067 */ 1068bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 1069 const struct drm_display_mode *mode2) 1070{ 1071 return drm_mode_match(mode1, mode2, 1072 DRM_MODE_MATCH_TIMINGS | 1073 DRM_MODE_MATCH_FLAGS); 1074} 1075EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1076 1077static enum drm_mode_status 1078drm_mode_validate_basic(const struct drm_display_mode *mode) 1079{ 1080 if (mode->type & ~DRM_MODE_TYPE_ALL) 1081 return MODE_BAD; 1082 1083 if (mode->flags & ~DRM_MODE_FLAG_ALL) 1084 return MODE_BAD; 1085 1086 if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1087 return MODE_BAD; 1088 1089 if (mode->clock == 0) 1090 return MODE_CLOCK_LOW; 1091 1092 if (mode->hdisplay == 0 || 1093 mode->hsync_start < mode->hdisplay || 1094 mode->hsync_end < mode->hsync_start || 1095 mode->htotal < mode->hsync_end) 1096 return MODE_H_ILLEGAL; 1097 1098 if (mode->vdisplay == 0 || 1099 mode->vsync_start < mode->vdisplay || 1100 mode->vsync_end < mode->vsync_start || 1101 mode->vtotal < mode->vsync_end) 1102 return MODE_V_ILLEGAL; 1103 1104 return MODE_OK; 1105} 1106 1107/** 1108 * drm_mode_validate_driver - make sure the mode is somewhat sane 1109 * @dev: drm device 1110 * @mode: mode to check 1111 * 1112 * First do basic validation on the mode, and then allow the driver 1113 * to check for device/driver specific limitations via the optional 1114 * &drm_mode_config_helper_funcs.mode_valid hook. 1115 * 1116 * Returns: 1117 * The mode status 1118 */ 1119enum drm_mode_status 1120drm_mode_validate_driver(struct drm_device *dev, 1121 const struct drm_display_mode *mode) 1122{ 1123 enum drm_mode_status status; 1124 1125 status = drm_mode_validate_basic(mode); 1126 if (status != MODE_OK) 1127 return status; 1128 1129 if (dev->mode_config.funcs->mode_valid) 1130 return dev->mode_config.funcs->mode_valid(dev, mode); 1131 else 1132 return MODE_OK; 1133} 1134EXPORT_SYMBOL(drm_mode_validate_driver); 1135 1136/** 1137 * drm_mode_validate_size - make sure modes adhere to size constraints 1138 * @mode: mode to check 1139 * @maxX: maximum width 1140 * @maxY: maximum height 1141 * 1142 * This function is a helper which can be used to validate modes against size 1143 * limitations of the DRM device/connector. If a mode is too big its status 1144 * member is updated with the appropriate validation failure code. The list 1145 * itself is not changed. 1146 * 1147 * Returns: 1148 * The mode status 1149 */ 1150enum drm_mode_status 1151drm_mode_validate_size(const struct drm_display_mode *mode, 1152 int maxX, int maxY) 1153{ 1154 if (maxX > 0 && mode->hdisplay > maxX) 1155 return MODE_VIRTUAL_X; 1156 1157 if (maxY > 0 && mode->vdisplay > maxY) 1158 return MODE_VIRTUAL_Y; 1159 1160 return MODE_OK; 1161} 1162EXPORT_SYMBOL(drm_mode_validate_size); 1163 1164/** 1165 * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed 1166 * @mode: mode to check 1167 * @connector: drm connector under action 1168 * 1169 * This function is a helper which can be used to filter out any YCBCR420 1170 * only mode, when the source doesn't support it. 1171 * 1172 * Returns: 1173 * The mode status 1174 */ 1175enum drm_mode_status 1176drm_mode_validate_ycbcr420(const struct drm_display_mode *mode, 1177 struct drm_connector *connector) 1178{ 1179 u8 vic = drm_match_cea_mode(mode); 1180 enum drm_mode_status status = MODE_OK; 1181 struct drm_hdmi_info *hdmi = &connector->display_info.hdmi; 1182 1183 if (test_bit(vic, hdmi->y420_vdb_modes)) { 1184 if (!connector->ycbcr_420_allowed) 1185 status = MODE_NO_420; 1186 } 1187 1188 return status; 1189} 1190EXPORT_SYMBOL(drm_mode_validate_ycbcr420); 1191 1192#define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1193 1194static const char * const drm_mode_status_names[] = { 1195 MODE_STATUS(OK), 1196 MODE_STATUS(HSYNC), 1197 MODE_STATUS(VSYNC), 1198 MODE_STATUS(H_ILLEGAL), 1199 MODE_STATUS(V_ILLEGAL), 1200 MODE_STATUS(BAD_WIDTH), 1201 MODE_STATUS(NOMODE), 1202 MODE_STATUS(NO_INTERLACE), 1203 MODE_STATUS(NO_DBLESCAN), 1204 MODE_STATUS(NO_VSCAN), 1205 MODE_STATUS(MEM), 1206 MODE_STATUS(VIRTUAL_X), 1207 MODE_STATUS(VIRTUAL_Y), 1208 MODE_STATUS(MEM_VIRT), 1209 MODE_STATUS(NOCLOCK), 1210 MODE_STATUS(CLOCK_HIGH), 1211 MODE_STATUS(CLOCK_LOW), 1212 MODE_STATUS(CLOCK_RANGE), 1213 MODE_STATUS(BAD_HVALUE), 1214 MODE_STATUS(BAD_VVALUE), 1215 MODE_STATUS(BAD_VSCAN), 1216 MODE_STATUS(HSYNC_NARROW), 1217 MODE_STATUS(HSYNC_WIDE), 1218 MODE_STATUS(HBLANK_NARROW), 1219 MODE_STATUS(HBLANK_WIDE), 1220 MODE_STATUS(VSYNC_NARROW), 1221 MODE_STATUS(VSYNC_WIDE), 1222 MODE_STATUS(VBLANK_NARROW), 1223 MODE_STATUS(VBLANK_WIDE), 1224 MODE_STATUS(PANEL), 1225 MODE_STATUS(INTERLACE_WIDTH), 1226 MODE_STATUS(ONE_WIDTH), 1227 MODE_STATUS(ONE_HEIGHT), 1228 MODE_STATUS(ONE_SIZE), 1229 MODE_STATUS(NO_REDUCED), 1230 MODE_STATUS(NO_STEREO), 1231 MODE_STATUS(NO_420), 1232 MODE_STATUS(STALE), 1233 MODE_STATUS(BAD), 1234 MODE_STATUS(ERROR), 1235}; 1236 1237#undef MODE_STATUS 1238 1239const char *drm_get_mode_status_name(enum drm_mode_status status) 1240{ 1241 int index = status + 3; 1242 1243 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1244 return ""; 1245 1246 return drm_mode_status_names[index]; 1247} 1248 1249/** 1250 * drm_mode_prune_invalid - remove invalid modes from mode list 1251 * @dev: DRM device 1252 * @mode_list: list of modes to check 1253 * @verbose: be verbose about it 1254 * 1255 * This helper function can be used to prune a display mode list after 1256 * validation has been completed. All modes whose status is not MODE_OK will be 1257 * removed from the list, and if @verbose the status code and mode name is also 1258 * printed to dmesg. 1259 */ 1260void drm_mode_prune_invalid(struct drm_device *dev, 1261 struct list_head *mode_list, bool verbose) 1262{ 1263 struct drm_display_mode *mode, *t; 1264 1265 list_for_each_entry_safe(mode, t, mode_list, head) { 1266 if (mode->status != MODE_OK) { 1267 list_del(&mode->head); 1268 if (verbose) { 1269 drm_mode_debug_printmodeline(mode); 1270 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1271 mode->name, 1272 drm_get_mode_status_name(mode->status)); 1273 } 1274 drm_mode_destroy(dev, mode); 1275 } 1276 } 1277} 1278EXPORT_SYMBOL(drm_mode_prune_invalid); 1279 1280/** 1281 * drm_mode_compare - compare modes for favorability 1282 * @priv: unused 1283 * @lh_a: list_head for first mode 1284 * @lh_b: list_head for second mode 1285 * 1286 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1287 * which is better. 1288 * 1289 * Returns: 1290 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1291 * positive if @lh_b is better than @lh_a. 1292 */ 1293static int drm_mode_compare(void *priv, const struct list_head *lh_a, 1294 const struct list_head *lh_b) 1295{ 1296 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1297 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1298 int diff; 1299 1300 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1301 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1302 if (diff) 1303 return diff; 1304 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1305 if (diff) 1306 return diff; 1307 1308 diff = drm_mode_vrefresh(b) - drm_mode_vrefresh(a); 1309 if (diff) 1310 return diff; 1311 1312 diff = b->clock - a->clock; 1313 return diff; 1314} 1315 1316/** 1317 * drm_mode_sort - sort mode list 1318 * @mode_list: list of drm_display_mode structures to sort 1319 * 1320 * Sort @mode_list by favorability, moving good modes to the head of the list. 1321 */ 1322void drm_mode_sort(struct list_head *mode_list) 1323{ 1324 list_sort(NULL, mode_list, drm_mode_compare); 1325} 1326EXPORT_SYMBOL(drm_mode_sort); 1327 1328/** 1329 * drm_connector_list_update - update the mode list for the connector 1330 * @connector: the connector to update 1331 * 1332 * This moves the modes from the @connector probed_modes list 1333 * to the actual mode list. It compares the probed mode against the current 1334 * list and only adds different/new modes. 1335 * 1336 * This is just a helper functions doesn't validate any modes itself and also 1337 * doesn't prune any invalid modes. Callers need to do that themselves. 1338 */ 1339void drm_connector_list_update(struct drm_connector *connector) 1340{ 1341 struct drm_display_mode *pmode, *pt; 1342 1343 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1344 1345 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1346 struct drm_display_mode *mode; 1347 bool found_it = false; 1348 1349 /* go through current modes checking for the new probed mode */ 1350 list_for_each_entry(mode, &connector->modes, head) { 1351 if (!drm_mode_equal(pmode, mode)) 1352 continue; 1353 1354 found_it = true; 1355 1356 /* 1357 * If the old matching mode is stale (ie. left over 1358 * from a previous probe) just replace it outright. 1359 * Otherwise just merge the type bits between all 1360 * equal probed modes. 1361 * 1362 * If two probed modes are considered equal, pick the 1363 * actual timings from the one that's marked as 1364 * preferred (in case the match isn't 100%). If 1365 * multiple or zero preferred modes are present, favor 1366 * the mode added to the probed_modes list first. 1367 */ 1368 if (mode->status == MODE_STALE) { 1369 drm_mode_copy(mode, pmode); 1370 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1371 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1372 pmode->type |= mode->type; 1373 drm_mode_copy(mode, pmode); 1374 } else { 1375 mode->type |= pmode->type; 1376 } 1377 1378 list_del(&pmode->head); 1379 drm_mode_destroy(connector->dev, pmode); 1380 break; 1381 } 1382 1383 if (!found_it) { 1384 list_move_tail(&pmode->head, &connector->modes); 1385 } 1386 } 1387} 1388EXPORT_SYMBOL(drm_connector_list_update); 1389 1390static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, 1391 struct drm_cmdline_mode *mode) 1392{ 1393 unsigned int bpp; 1394 1395 if (str[0] != '-') 1396 return -EINVAL; 1397 1398 str++; 1399 bpp = simple_strtol(str, end_ptr, 10); 1400 if (*end_ptr == str) 1401 return -EINVAL; 1402 1403 mode->bpp = bpp; 1404 mode->bpp_specified = true; 1405 1406 return 0; 1407} 1408 1409static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, 1410 struct drm_cmdline_mode *mode) 1411{ 1412 unsigned int refresh; 1413 1414 if (str[0] != '@') 1415 return -EINVAL; 1416 1417 str++; 1418 refresh = simple_strtol(str, end_ptr, 10); 1419 if (*end_ptr == str) 1420 return -EINVAL; 1421 1422 mode->refresh = refresh; 1423 mode->refresh_specified = true; 1424 1425 return 0; 1426} 1427 1428static int drm_mode_parse_cmdline_extra(const char *str, int length, 1429 bool freestanding, 1430 const struct drm_connector *connector, 1431 struct drm_cmdline_mode *mode) 1432{ 1433 int i; 1434 1435 for (i = 0; i < length; i++) { 1436 switch (str[i]) { 1437 case 'i': 1438 if (freestanding) 1439 return -EINVAL; 1440 1441 mode->interlace = true; 1442 break; 1443 case 'm': 1444 if (freestanding) 1445 return -EINVAL; 1446 1447 mode->margins = true; 1448 break; 1449 case 'D': 1450 if (mode->force != DRM_FORCE_UNSPECIFIED) 1451 return -EINVAL; 1452 1453 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1454 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1455 mode->force = DRM_FORCE_ON; 1456 else 1457 mode->force = DRM_FORCE_ON_DIGITAL; 1458 break; 1459 case 'd': 1460 if (mode->force != DRM_FORCE_UNSPECIFIED) 1461 return -EINVAL; 1462 1463 mode->force = DRM_FORCE_OFF; 1464 break; 1465 case 'e': 1466 if (mode->force != DRM_FORCE_UNSPECIFIED) 1467 return -EINVAL; 1468 1469 mode->force = DRM_FORCE_ON; 1470 break; 1471 default: 1472 return -EINVAL; 1473 } 1474 } 1475 1476 return 0; 1477} 1478 1479static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, 1480 bool extras, 1481 const struct drm_connector *connector, 1482 struct drm_cmdline_mode *mode) 1483{ 1484 const char *str_start = str; 1485 bool rb = false, cvt = false; 1486 int xres = 0, yres = 0; 1487 int remaining, i; 1488 char *end_ptr; 1489 1490 xres = simple_strtol(str, &end_ptr, 10); 1491 if (end_ptr == str) 1492 return -EINVAL; 1493 1494 if (end_ptr[0] != 'x') 1495 return -EINVAL; 1496 end_ptr++; 1497 1498 str = end_ptr; 1499 yres = simple_strtol(str, &end_ptr, 10); 1500 if (end_ptr == str) 1501 return -EINVAL; 1502 1503 remaining = length - (end_ptr - str_start); 1504 if (remaining < 0) 1505 return -EINVAL; 1506 1507 for (i = 0; i < remaining; i++) { 1508 switch (end_ptr[i]) { 1509 case 'M': 1510 cvt = true; 1511 break; 1512 case 'R': 1513 rb = true; 1514 break; 1515 default: 1516 /* 1517 * Try to pass that to our extras parsing 1518 * function to handle the case where the 1519 * extras are directly after the resolution 1520 */ 1521 if (extras) { 1522 int ret = drm_mode_parse_cmdline_extra(end_ptr + i, 1523 1, 1524 false, 1525 connector, 1526 mode); 1527 if (ret) 1528 return ret; 1529 } else { 1530 return -EINVAL; 1531 } 1532 } 1533 } 1534 1535 mode->xres = xres; 1536 mode->yres = yres; 1537 mode->cvt = cvt; 1538 mode->rb = rb; 1539 1540 return 0; 1541} 1542 1543static int drm_mode_parse_cmdline_int(const char *delim, unsigned int *int_ret) 1544{ 1545 const char *value; 1546 char *endp; 1547 1548 /* 1549 * delim must point to the '=', otherwise it is a syntax error and 1550 * if delim points to the terminating zero, then delim + 1 wil point 1551 * past the end of the string. 1552 */ 1553 if (*delim != '=') 1554 return -EINVAL; 1555 1556 value = delim + 1; 1557 *int_ret = simple_strtol(value, &endp, 10); 1558 1559 /* Make sure we have parsed something */ 1560 if (endp == value) 1561 return -EINVAL; 1562 1563 return 0; 1564} 1565 1566static int drm_mode_parse_panel_orientation(const char *delim, 1567 struct drm_cmdline_mode *mode) 1568{ 1569 const char *value; 1570 1571 if (*delim != '=') 1572 return -EINVAL; 1573 1574 value = delim + 1; 1575 delim = strchr(value, ','); 1576 if (!delim) 1577 delim = value + strlen(value); 1578 1579 if (!strncmp(value, "normal", delim - value)) 1580 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL; 1581 else if (!strncmp(value, "upside_down", delim - value)) 1582 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP; 1583 else if (!strncmp(value, "left_side_up", delim - value)) 1584 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP; 1585 else if (!strncmp(value, "right_side_up", delim - value)) 1586 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP; 1587 else 1588 return -EINVAL; 1589 1590 return 0; 1591} 1592 1593static int drm_mode_parse_cmdline_options(const char *str, 1594 bool freestanding, 1595 const struct drm_connector *connector, 1596 struct drm_cmdline_mode *mode) 1597{ 1598 unsigned int deg, margin, rotation = 0; 1599 const char *delim, *option, *sep; 1600 1601 option = str; 1602 do { 1603 delim = strchr(option, '='); 1604 if (!delim) { 1605 delim = strchr(option, ','); 1606 1607 if (!delim) 1608 delim = option + strlen(option); 1609 } 1610 1611 if (!strncmp(option, "rotate", delim - option)) { 1612 if (drm_mode_parse_cmdline_int(delim, °)) 1613 return -EINVAL; 1614 1615 switch (deg) { 1616 case 0: 1617 rotation |= DRM_MODE_ROTATE_0; 1618 break; 1619 1620 case 90: 1621 rotation |= DRM_MODE_ROTATE_90; 1622 break; 1623 1624 case 180: 1625 rotation |= DRM_MODE_ROTATE_180; 1626 break; 1627 1628 case 270: 1629 rotation |= DRM_MODE_ROTATE_270; 1630 break; 1631 1632 default: 1633 return -EINVAL; 1634 } 1635 } else if (!strncmp(option, "reflect_x", delim - option)) { 1636 rotation |= DRM_MODE_REFLECT_X; 1637 } else if (!strncmp(option, "reflect_y", delim - option)) { 1638 rotation |= DRM_MODE_REFLECT_Y; 1639 } else if (!strncmp(option, "margin_right", delim - option)) { 1640 if (drm_mode_parse_cmdline_int(delim, &margin)) 1641 return -EINVAL; 1642 1643 mode->tv_margins.right = margin; 1644 } else if (!strncmp(option, "margin_left", delim - option)) { 1645 if (drm_mode_parse_cmdline_int(delim, &margin)) 1646 return -EINVAL; 1647 1648 mode->tv_margins.left = margin; 1649 } else if (!strncmp(option, "margin_top", delim - option)) { 1650 if (drm_mode_parse_cmdline_int(delim, &margin)) 1651 return -EINVAL; 1652 1653 mode->tv_margins.top = margin; 1654 } else if (!strncmp(option, "margin_bottom", delim - option)) { 1655 if (drm_mode_parse_cmdline_int(delim, &margin)) 1656 return -EINVAL; 1657 1658 mode->tv_margins.bottom = margin; 1659 } else if (!strncmp(option, "panel_orientation", delim - option)) { 1660 if (drm_mode_parse_panel_orientation(delim, mode)) 1661 return -EINVAL; 1662 } else { 1663 return -EINVAL; 1664 } 1665 sep = strchr(delim, ','); 1666 option = sep + 1; 1667 } while (sep); 1668 1669 if (rotation && freestanding) 1670 return -EINVAL; 1671 1672 if (!(rotation & DRM_MODE_ROTATE_MASK)) 1673 rotation |= DRM_MODE_ROTATE_0; 1674 1675 /* Make sure there is exactly one rotation defined */ 1676 if (!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK)) 1677 return -EINVAL; 1678 1679 mode->rotation_reflection = rotation; 1680 1681 return 0; 1682} 1683 1684static const char * const drm_named_modes_whitelist[] = { 1685 "NTSC", 1686 "PAL", 1687}; 1688 1689/** 1690 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1691 * @mode_option: optional per connector mode option 1692 * @connector: connector to parse modeline for 1693 * @mode: preallocated drm_cmdline_mode structure to fill out 1694 * 1695 * This parses @mode_option command line modeline for modes and options to 1696 * configure the connector. If @mode_option is NULL the default command line 1697 * modeline in fb_mode_option will be parsed instead. 1698 * 1699 * This uses the same parameters as the fb modedb.c, except for an extra 1700 * force-enable, force-enable-digital and force-disable bit at the end:: 1701 * 1702 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1703 * 1704 * Additionals options can be provided following the mode, using a comma to 1705 * separate each option. Valid options can be found in 1706 * Documentation/fb/modedb.rst. 1707 * 1708 * The intermediate drm_cmdline_mode structure is required to store additional 1709 * options from the command line modline like the force-enable/disable flag. 1710 * 1711 * Returns: 1712 * True if a valid modeline has been parsed, false otherwise. 1713 */ 1714bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1715 const struct drm_connector *connector, 1716 struct drm_cmdline_mode *mode) 1717{ 1718 const char *name; 1719 bool freestanding = false, parse_extras = false; 1720 unsigned int bpp_off = 0, refresh_off = 0, options_off = 0; 1721 unsigned int mode_end = 0; 1722 const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; 1723 const char *options_ptr = NULL; 1724 char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; 1725 int i, len, ret; 1726 1727 memset(mode, 0, sizeof(*mode)); 1728 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 1729 1730 if (!mode_option) 1731 return false; 1732 1733 name = mode_option; 1734 1735 /* Try to locate the bpp and refresh specifiers, if any */ 1736 bpp_ptr = strchr(name, '-'); 1737 if (bpp_ptr) 1738 bpp_off = bpp_ptr - name; 1739 1740 refresh_ptr = strchr(name, '@'); 1741 if (refresh_ptr) 1742 refresh_off = refresh_ptr - name; 1743 1744 /* Locate the start of named options */ 1745 options_ptr = strchr(name, ','); 1746 if (options_ptr) 1747 options_off = options_ptr - name; 1748 1749 /* Locate the end of the name / resolution, and parse it */ 1750 if (bpp_ptr) { 1751 mode_end = bpp_off; 1752 } else if (refresh_ptr) { 1753 mode_end = refresh_off; 1754 } else if (options_ptr) { 1755 mode_end = options_off; 1756 parse_extras = true; 1757 } else { 1758 mode_end = strlen(name); 1759 parse_extras = true; 1760 } 1761 1762 /* First check for a named mode */ 1763 for (i = 0; i < ARRAY_SIZE(drm_named_modes_whitelist); i++) { 1764 ret = str_has_prefix(name, drm_named_modes_whitelist[i]); 1765 if (ret == mode_end) { 1766 if (refresh_ptr) 1767 return false; /* named + refresh is invalid */ 1768 1769 strcpy(mode->name, drm_named_modes_whitelist[i]); 1770 mode->specified = true; 1771 break; 1772 } 1773 } 1774 1775 /* No named mode? Check for a normal mode argument, e.g. 1024x768 */ 1776 if (!mode->specified && isdigit(name[0])) { 1777 ret = drm_mode_parse_cmdline_res_mode(name, mode_end, 1778 parse_extras, 1779 connector, 1780 mode); 1781 if (ret) 1782 return false; 1783 1784 mode->specified = true; 1785 } 1786 1787 /* No mode? Check for freestanding extras and/or options */ 1788 if (!mode->specified) { 1789 unsigned int len = strlen(mode_option); 1790 1791 if (bpp_ptr || refresh_ptr) 1792 return false; /* syntax error */ 1793 1794 if (len == 1 || (len >= 2 && mode_option[1] == ',')) 1795 extra_ptr = mode_option; 1796 else 1797 options_ptr = mode_option - 1; 1798 1799 freestanding = true; 1800 } 1801 1802 if (bpp_ptr) { 1803 ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); 1804 if (ret) 1805 return false; 1806 1807 mode->bpp_specified = true; 1808 } 1809 1810 if (refresh_ptr) { 1811 ret = drm_mode_parse_cmdline_refresh(refresh_ptr, 1812 &refresh_end_ptr, mode); 1813 if (ret) 1814 return false; 1815 1816 mode->refresh_specified = true; 1817 } 1818 1819 /* 1820 * Locate the end of the bpp / refresh, and parse the extras 1821 * if relevant 1822 */ 1823 if (bpp_ptr && refresh_ptr) 1824 extra_ptr = max(bpp_end_ptr, refresh_end_ptr); 1825 else if (bpp_ptr) 1826 extra_ptr = bpp_end_ptr; 1827 else if (refresh_ptr) 1828 extra_ptr = refresh_end_ptr; 1829 1830 if (extra_ptr) { 1831 if (options_ptr) 1832 len = options_ptr - extra_ptr; 1833 else 1834 len = strlen(extra_ptr); 1835 1836 ret = drm_mode_parse_cmdline_extra(extra_ptr, len, freestanding, 1837 connector, mode); 1838 if (ret) 1839 return false; 1840 } 1841 1842 if (options_ptr) { 1843 ret = drm_mode_parse_cmdline_options(options_ptr + 1, 1844 freestanding, 1845 connector, mode); 1846 if (ret) 1847 return false; 1848 } 1849 1850 return true; 1851} 1852EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1853 1854/** 1855 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1856 * @dev: DRM device to create the new mode for 1857 * @cmd: input command line modeline 1858 * 1859 * Returns: 1860 * Pointer to converted mode on success, NULL on error. 1861 */ 1862struct drm_display_mode * 1863drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1864 struct drm_cmdline_mode *cmd) 1865{ 1866 struct drm_display_mode *mode; 1867 1868 if (cmd->cvt) 1869 mode = drm_cvt_mode(dev, 1870 cmd->xres, cmd->yres, 1871 cmd->refresh_specified ? cmd->refresh : 60, 1872 cmd->rb, cmd->interlace, 1873 cmd->margins); 1874 else 1875 mode = drm_gtf_mode(dev, 1876 cmd->xres, cmd->yres, 1877 cmd->refresh_specified ? cmd->refresh : 60, 1878 cmd->interlace, 1879 cmd->margins); 1880 if (!mode) 1881 return NULL; 1882 1883 mode->type |= DRM_MODE_TYPE_USERDEF; 1884 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ 1885 if (cmd->xres == 1366) 1886 drm_mode_fixup_1366x768(mode); 1887 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1888 return mode; 1889} 1890EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1891 1892/** 1893 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1894 * @out: drm_mode_modeinfo struct to return to the user 1895 * @in: drm_display_mode to use 1896 * 1897 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1898 * the user. 1899 */ 1900void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1901 const struct drm_display_mode *in) 1902{ 1903 out->clock = in->clock; 1904 out->hdisplay = in->hdisplay; 1905 out->hsync_start = in->hsync_start; 1906 out->hsync_end = in->hsync_end; 1907 out->htotal = in->htotal; 1908 out->hskew = in->hskew; 1909 out->vdisplay = in->vdisplay; 1910 out->vsync_start = in->vsync_start; 1911 out->vsync_end = in->vsync_end; 1912 out->vtotal = in->vtotal; 1913 out->vscan = in->vscan; 1914 out->vrefresh = drm_mode_vrefresh(in); 1915 out->flags = in->flags; 1916 out->type = in->type; 1917 1918 switch (in->picture_aspect_ratio) { 1919 case HDMI_PICTURE_ASPECT_4_3: 1920 out->flags |= DRM_MODE_FLAG_PIC_AR_4_3; 1921 break; 1922 case HDMI_PICTURE_ASPECT_16_9: 1923 out->flags |= DRM_MODE_FLAG_PIC_AR_16_9; 1924 break; 1925 case HDMI_PICTURE_ASPECT_64_27: 1926 out->flags |= DRM_MODE_FLAG_PIC_AR_64_27; 1927 break; 1928 case HDMI_PICTURE_ASPECT_256_135: 1929 out->flags |= DRM_MODE_FLAG_PIC_AR_256_135; 1930 break; 1931 default: 1932 WARN(1, "Invalid aspect ratio (0%x) on mode\n", 1933 in->picture_aspect_ratio); 1934 fallthrough; 1935 case HDMI_PICTURE_ASPECT_NONE: 1936 out->flags |= DRM_MODE_FLAG_PIC_AR_NONE; 1937 break; 1938 } 1939 1940 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1941 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1942} 1943 1944/** 1945 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1946 * @dev: drm device 1947 * @out: drm_display_mode to return to the user 1948 * @in: drm_mode_modeinfo to use 1949 * 1950 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1951 * the caller. 1952 * 1953 * Returns: 1954 * Zero on success, negative errno on failure. 1955 */ 1956int drm_mode_convert_umode(struct drm_device *dev, 1957 struct drm_display_mode *out, 1958 const struct drm_mode_modeinfo *in) 1959{ 1960 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 1961 return -ERANGE; 1962 1963 out->clock = in->clock; 1964 out->hdisplay = in->hdisplay; 1965 out->hsync_start = in->hsync_start; 1966 out->hsync_end = in->hsync_end; 1967 out->htotal = in->htotal; 1968 out->hskew = in->hskew; 1969 out->vdisplay = in->vdisplay; 1970 out->vsync_start = in->vsync_start; 1971 out->vsync_end = in->vsync_end; 1972 out->vtotal = in->vtotal; 1973 out->vscan = in->vscan; 1974 out->flags = in->flags; 1975 /* 1976 * Old xf86-video-vmware (possibly others too) used to 1977 * leave 'type' unititialized. Just ignore any bits we 1978 * don't like. It's a just hint after all, and more 1979 * useful for the kernel->userspace direction anyway. 1980 */ 1981 out->type = in->type & DRM_MODE_TYPE_ALL; 1982 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1983 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1984 1985 /* Clearing picture aspect ratio bits from out flags, 1986 * as the aspect-ratio information is not stored in 1987 * flags for kernel-mode, but in picture_aspect_ratio. 1988 */ 1989 out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 1990 1991 switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) { 1992 case DRM_MODE_FLAG_PIC_AR_4_3: 1993 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3; 1994 break; 1995 case DRM_MODE_FLAG_PIC_AR_16_9: 1996 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9; 1997 break; 1998 case DRM_MODE_FLAG_PIC_AR_64_27: 1999 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27; 2000 break; 2001 case DRM_MODE_FLAG_PIC_AR_256_135: 2002 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135; 2003 break; 2004 case DRM_MODE_FLAG_PIC_AR_NONE: 2005 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE; 2006 break; 2007 default: 2008 return -EINVAL; 2009 } 2010 2011 out->status = drm_mode_validate_driver(dev, out); 2012 if (out->status != MODE_OK) 2013 return -EINVAL; 2014 2015 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 2016 2017 return 0; 2018} 2019 2020/** 2021 * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420 2022 * output format 2023 * 2024 * @display: display under action 2025 * @mode: video mode to be tested. 2026 * 2027 * Returns: 2028 * true if the mode can be supported in YCBCR420 format 2029 * false if not. 2030 */ 2031bool drm_mode_is_420_only(const struct drm_display_info *display, 2032 const struct drm_display_mode *mode) 2033{ 2034 u8 vic = drm_match_cea_mode(mode); 2035 2036 return test_bit(vic, display->hdmi.y420_vdb_modes); 2037} 2038EXPORT_SYMBOL(drm_mode_is_420_only); 2039 2040/** 2041 * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420 2042 * output format also (along with RGB/YCBCR444/422) 2043 * 2044 * @display: display under action. 2045 * @mode: video mode to be tested. 2046 * 2047 * Returns: 2048 * true if the mode can be support YCBCR420 format 2049 * false if not. 2050 */ 2051bool drm_mode_is_420_also(const struct drm_display_info *display, 2052 const struct drm_display_mode *mode) 2053{ 2054 u8 vic = drm_match_cea_mode(mode); 2055 2056 return test_bit(vic, display->hdmi.y420_cmdb_modes); 2057} 2058EXPORT_SYMBOL(drm_mode_is_420_also); 2059/** 2060 * drm_mode_is_420 - if a given videomode can be supported in YCBCR420 2061 * output format 2062 * 2063 * @display: display under action. 2064 * @mode: video mode to be tested. 2065 * 2066 * Returns: 2067 * true if the mode can be supported in YCBCR420 format 2068 * false if not. 2069 */ 2070bool drm_mode_is_420(const struct drm_display_info *display, 2071 const struct drm_display_mode *mode) 2072{ 2073 return drm_mode_is_420_only(display, mode) || 2074 drm_mode_is_420_also(display, mode); 2075} 2076EXPORT_SYMBOL(drm_mode_is_420); 2077