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_display_timing.h> 39 #include <video/of_videomode.h> 40 #include <video/videomode.h> 41 42 #include <drm/drm_crtc.h> 43 #include <drm/drm_device.h> 44 #include <drm/drm_modes.h> 45 #include <drm/drm_print.h> 46 47 #include "drm_crtc_internal.h" 48 49 /** 50 * drm_mode_debug_printmodeline - print a mode to dmesg 51 * @mode: mode to print 52 * 53 * Describe @mode using DRM_DEBUG. 54 */ 55 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) 56 { 57 DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 58 } 59 EXPORT_SYMBOL(drm_mode_debug_printmodeline); 60 61 /** 62 * drm_mode_create - create a new display mode 63 * @dev: DRM device 64 * 65 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it 66 * and return it. 67 * 68 * Returns: 69 * Pointer to new mode on success, NULL on error. 70 */ 71 struct drm_display_mode *drm_mode_create(struct drm_device *dev) 72 { 73 struct drm_display_mode *nmode; 74 75 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); 76 if (!nmode) 77 return NULL; 78 79 return nmode; 80 } 81 EXPORT_SYMBOL(drm_mode_create); 82 83 /** 84 * drm_mode_destroy - remove a mode 85 * @dev: DRM device 86 * @mode: mode to remove 87 * 88 * Release @mode's unique ID, then free it @mode structure itself using kfree. 89 */ 90 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) 91 { 92 if (!mode) 93 return; 94 95 kfree(mode); 96 } 97 EXPORT_SYMBOL(drm_mode_destroy); 98 99 /** 100 * drm_mode_probed_add - add a mode to a connector's probed_mode list 101 * @connector: connector the new mode 102 * @mode: mode data 103 * 104 * Add @mode to @connector's probed_mode list for later use. This list should 105 * then in a second step get filtered and all the modes actually supported by 106 * the hardware moved to the @connector's modes list. 107 */ 108 void drm_mode_probed_add(struct drm_connector *connector, 109 struct drm_display_mode *mode) 110 { 111 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 112 113 list_add_tail(&mode->head, &connector->probed_modes); 114 } 115 EXPORT_SYMBOL(drm_mode_probed_add); 116 117 /** 118 * drm_cvt_mode -create a modeline based on the CVT algorithm 119 * @dev: drm device 120 * @hdisplay: hdisplay size 121 * @vdisplay: vdisplay size 122 * @vrefresh: vrefresh rate 123 * @reduced: whether to use reduced blanking 124 * @interlaced: whether to compute an interlaced mode 125 * @margins: whether to add margins (borders) 126 * 127 * This function is called to generate the modeline based on CVT algorithm 128 * according to the hdisplay, vdisplay, vrefresh. 129 * It is based from the VESA(TM) Coordinated Video Timing Generator by 130 * Graham Loveridge April 9, 2003 available at 131 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 132 * 133 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 134 * What I have done is to translate it by using integer calculation. 135 * 136 * Returns: 137 * The modeline based on the CVT algorithm stored in a drm_display_mode object. 138 * The display mode object is allocated with drm_mode_create(). Returns NULL 139 * when no mode could be allocated. 140 */ 141 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 142 int vdisplay, int vrefresh, 143 bool reduced, bool interlaced, bool margins) 144 { 145 #define HV_FACTOR 1000 146 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 147 #define CVT_MARGIN_PERCENTAGE 18 148 /* 2) character cell horizontal granularity (pixels) - default 8 */ 149 #define CVT_H_GRANULARITY 8 150 /* 3) Minimum vertical porch (lines) - default 3 */ 151 #define CVT_MIN_V_PORCH 3 152 /* 4) Minimum number of vertical back porch lines - default 6 */ 153 #define CVT_MIN_V_BPORCH 6 154 /* Pixel Clock step (kHz) */ 155 #define CVT_CLOCK_STEP 250 156 struct drm_display_mode *drm_mode; 157 unsigned int vfieldrate, hperiod; 158 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 159 int interlace; 160 u64 tmp; 161 162 if (!hdisplay || !vdisplay) 163 return NULL; 164 165 /* allocate the drm_display_mode structure. If failure, we will 166 * return directly 167 */ 168 drm_mode = drm_mode_create(dev); 169 if (!drm_mode) 170 return NULL; 171 172 /* the CVT default refresh rate is 60Hz */ 173 if (!vrefresh) 174 vrefresh = 60; 175 176 /* the required field fresh rate */ 177 if (interlaced) 178 vfieldrate = vrefresh * 2; 179 else 180 vfieldrate = vrefresh; 181 182 /* horizontal pixels */ 183 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 184 185 /* determine the left&right borders */ 186 hmargin = 0; 187 if (margins) { 188 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 189 hmargin -= hmargin % CVT_H_GRANULARITY; 190 } 191 /* find the total active pixels */ 192 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 193 194 /* find the number of lines per field */ 195 if (interlaced) 196 vdisplay_rnd = vdisplay / 2; 197 else 198 vdisplay_rnd = vdisplay; 199 200 /* find the top & bottom borders */ 201 vmargin = 0; 202 if (margins) 203 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 204 205 drm_mode->vdisplay = vdisplay + 2 * vmargin; 206 207 /* Interlaced */ 208 if (interlaced) 209 interlace = 1; 210 else 211 interlace = 0; 212 213 /* Determine VSync Width from aspect ratio */ 214 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 215 vsync = 4; 216 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 217 vsync = 5; 218 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 219 vsync = 6; 220 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 221 vsync = 7; 222 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 223 vsync = 7; 224 else /* custom */ 225 vsync = 10; 226 227 if (!reduced) { 228 /* simplify the GTF calculation */ 229 /* 4) Minimum time of vertical sync + back porch interval (µs) 230 * default 550.0 231 */ 232 int tmp1, tmp2; 233 #define CVT_MIN_VSYNC_BP 550 234 /* 3) Nominal HSync width (% of line period) - default 8 */ 235 #define CVT_HSYNC_PERCENTAGE 8 236 unsigned int hblank_percentage; 237 int vsyncandback_porch, __maybe_unused vback_porch, hblank; 238 239 /* estimated the horizontal period */ 240 tmp1 = HV_FACTOR * 1000000 - 241 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 242 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 243 interlace; 244 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 245 246 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 247 /* 9. Find number of lines in sync + backporch */ 248 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 249 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 250 else 251 vsyncandback_porch = tmp1; 252 /* 10. Find number of lines in back porch */ 253 vback_porch = vsyncandback_porch - vsync; 254 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 255 vsyncandback_porch + CVT_MIN_V_PORCH; 256 /* 5) Definition of Horizontal blanking time limitation */ 257 /* Gradient (%/kHz) - default 600 */ 258 #define CVT_M_FACTOR 600 259 /* Offset (%) - default 40 */ 260 #define CVT_C_FACTOR 40 261 /* Blanking time scaling factor - default 128 */ 262 #define CVT_K_FACTOR 128 263 /* Scaling factor weighting - default 20 */ 264 #define CVT_J_FACTOR 20 265 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 266 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 267 CVT_J_FACTOR) 268 /* 12. Find ideal blanking duty cycle from formula */ 269 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 270 hperiod / 1000; 271 /* 13. Blanking time */ 272 if (hblank_percentage < 20 * HV_FACTOR) 273 hblank_percentage = 20 * HV_FACTOR; 274 hblank = drm_mode->hdisplay * hblank_percentage / 275 (100 * HV_FACTOR - hblank_percentage); 276 hblank -= hblank % (2 * CVT_H_GRANULARITY); 277 /* 14. find the total pixels per line */ 278 drm_mode->htotal = drm_mode->hdisplay + hblank; 279 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 280 drm_mode->hsync_start = drm_mode->hsync_end - 281 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 282 drm_mode->hsync_start += CVT_H_GRANULARITY - 283 drm_mode->hsync_start % CVT_H_GRANULARITY; 284 /* fill the Vsync values */ 285 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 286 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 287 } else { 288 /* Reduced blanking */ 289 /* Minimum vertical blanking interval time (µs)- default 460 */ 290 #define CVT_RB_MIN_VBLANK 460 291 /* Fixed number of clocks for horizontal sync */ 292 #define CVT_RB_H_SYNC 32 293 /* Fixed number of clocks for horizontal blanking */ 294 #define CVT_RB_H_BLANK 160 295 /* Fixed number of lines for vertical front porch - default 3*/ 296 #define CVT_RB_VFPORCH 3 297 int vbilines; 298 int tmp1, tmp2; 299 /* 8. Estimate Horizontal period. */ 300 tmp1 = HV_FACTOR * 1000000 - 301 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 302 tmp2 = vdisplay_rnd + 2 * vmargin; 303 hperiod = tmp1 / (tmp2 * vfieldrate); 304 /* 9. Find number of lines in vertical blanking */ 305 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 306 /* 10. Check if vertical blanking is sufficient */ 307 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 308 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 309 /* 11. Find total number of lines in vertical field */ 310 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 311 /* 12. Find total number of pixels in a line */ 312 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 313 /* Fill in HSync values */ 314 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 315 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 316 /* Fill in VSync values */ 317 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 318 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 319 } 320 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 321 tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */ 322 tmp *= HV_FACTOR * 1000; 323 do_div(tmp, hperiod); 324 tmp -= drm_mode->clock % CVT_CLOCK_STEP; 325 drm_mode->clock = tmp; 326 /* 18/16. Find actual vertical frame frequency */ 327 /* ignore - just set the mode flag for interlaced */ 328 if (interlaced) { 329 drm_mode->vtotal *= 2; 330 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 331 } 332 /* Fill the mode line name */ 333 drm_mode_set_name(drm_mode); 334 if (reduced) 335 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 336 DRM_MODE_FLAG_NVSYNC); 337 else 338 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 339 DRM_MODE_FLAG_NHSYNC); 340 341 return drm_mode; 342 } 343 EXPORT_SYMBOL(drm_cvt_mode); 344 345 /** 346 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm 347 * @dev: drm device 348 * @hdisplay: hdisplay size 349 * @vdisplay: vdisplay size 350 * @vrefresh: vrefresh rate. 351 * @interlaced: whether to compute an interlaced mode 352 * @margins: desired margin (borders) size 353 * @GTF_M: extended GTF formula parameters 354 * @GTF_2C: extended GTF formula parameters 355 * @GTF_K: extended GTF formula parameters 356 * @GTF_2J: extended GTF formula parameters 357 * 358 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 359 * in here multiplied by two. For a C of 40, pass in 80. 360 * 361 * Returns: 362 * The modeline based on the full GTF algorithm stored in a drm_display_mode object. 363 * The display mode object is allocated with drm_mode_create(). Returns NULL 364 * when no mode could be allocated. 365 */ 366 struct drm_display_mode * 367 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 368 int vrefresh, bool interlaced, int margins, 369 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 370 { /* 1) top/bottom margin size (% of height) - default: 1.8, */ 371 #define GTF_MARGIN_PERCENTAGE 18 372 /* 2) character cell horizontal granularity (pixels) - default 8 */ 373 #define GTF_CELL_GRAN 8 374 /* 3) Minimum vertical porch (lines) - default 3 */ 375 #define GTF_MIN_V_PORCH 1 376 /* width of vsync in lines */ 377 #define V_SYNC_RQD 3 378 /* width of hsync as % of total line */ 379 #define H_SYNC_PERCENT 8 380 /* min time of vsync + back porch (microsec) */ 381 #define MIN_VSYNC_PLUS_BP 550 382 /* C' and M' are part of the Blanking Duty Cycle computation */ 383 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 384 #define GTF_M_PRIME (GTF_K * GTF_M / 256) 385 struct drm_display_mode *drm_mode; 386 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 387 int top_margin, bottom_margin; 388 int interlace; 389 unsigned int hfreq_est; 390 int vsync_plus_bp, __maybe_unused vback_porch; 391 unsigned int vtotal_lines, __maybe_unused vfieldrate_est; 392 unsigned int __maybe_unused hperiod; 393 unsigned int vfield_rate, __maybe_unused vframe_rate; 394 int left_margin, right_margin; 395 unsigned int total_active_pixels, ideal_duty_cycle; 396 unsigned int hblank, total_pixels, pixel_freq; 397 int hsync, hfront_porch, vodd_front_porch_lines; 398 unsigned int tmp1, tmp2; 399 400 if (!hdisplay || !vdisplay) 401 return NULL; 402 403 drm_mode = drm_mode_create(dev); 404 if (!drm_mode) 405 return NULL; 406 407 /* 1. In order to give correct results, the number of horizontal 408 * pixels requested is first processed to ensure that it is divisible 409 * by the character size, by rounding it to the nearest character 410 * cell boundary: 411 */ 412 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 413 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 414 415 /* 2. If interlace is requested, the number of vertical lines assumed 416 * by the calculation must be halved, as the computation calculates 417 * the number of vertical lines per field. 418 */ 419 if (interlaced) 420 vdisplay_rnd = vdisplay / 2; 421 else 422 vdisplay_rnd = vdisplay; 423 424 /* 3. Find the frame rate required: */ 425 if (interlaced) 426 vfieldrate_rqd = vrefresh * 2; 427 else 428 vfieldrate_rqd = vrefresh; 429 430 /* 4. Find number of lines in Top margin: */ 431 top_margin = 0; 432 if (margins) 433 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 434 1000; 435 /* 5. Find number of lines in bottom margin: */ 436 bottom_margin = top_margin; 437 438 /* 6. If interlace is required, then set variable interlace: */ 439 if (interlaced) 440 interlace = 1; 441 else 442 interlace = 0; 443 444 /* 7. Estimate the Horizontal frequency */ 445 { 446 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 447 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 448 2 + interlace; 449 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 450 } 451 452 /* 8. Find the number of lines in V sync + back porch */ 453 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 454 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 455 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 456 /* 9. Find the number of lines in V back porch alone: */ 457 vback_porch = vsync_plus_bp - V_SYNC_RQD; 458 /* 10. Find the total number of lines in Vertical field period: */ 459 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 460 vsync_plus_bp + GTF_MIN_V_PORCH; 461 /* 11. Estimate the Vertical field frequency: */ 462 vfieldrate_est = hfreq_est / vtotal_lines; 463 /* 12. Find the actual horizontal period: */ 464 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 465 466 /* 13. Find the actual Vertical field frequency: */ 467 vfield_rate = hfreq_est / vtotal_lines; 468 /* 14. Find the Vertical frame frequency: */ 469 if (interlaced) 470 vframe_rate = vfield_rate / 2; 471 else 472 vframe_rate = vfield_rate; 473 /* 15. Find number of pixels in left margin: */ 474 if (margins) 475 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 476 1000; 477 else 478 left_margin = 0; 479 480 /* 16.Find number of pixels in right margin: */ 481 right_margin = left_margin; 482 /* 17.Find total number of active pixels in image and left and right */ 483 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 484 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 485 ideal_duty_cycle = GTF_C_PRIME * 1000 - 486 (GTF_M_PRIME * 1000000 / hfreq_est); 487 /* 19.Find the number of pixels in the blanking time to the nearest 488 * double character cell: */ 489 hblank = total_active_pixels * ideal_duty_cycle / 490 (100000 - ideal_duty_cycle); 491 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 492 hblank = hblank * 2 * GTF_CELL_GRAN; 493 /* 20.Find total number of pixels: */ 494 total_pixels = total_active_pixels + hblank; 495 /* 21.Find pixel clock frequency: */ 496 pixel_freq = total_pixels * hfreq_est / 1000; 497 /* Stage 1 computations are now complete; I should really pass 498 * the results to another function and do the Stage 2 computations, 499 * but I only need a few more values so I'll just append the 500 * computations here for now */ 501 /* 17. Find the number of pixels in the horizontal sync period: */ 502 hsync = H_SYNC_PERCENT * total_pixels / 100; 503 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 504 hsync = hsync * GTF_CELL_GRAN; 505 /* 18. Find the number of pixels in horizontal front porch period */ 506 hfront_porch = hblank / 2 - hsync; 507 /* 36. Find the number of lines in the odd front porch period: */ 508 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 509 510 /* finally, pack the results in the mode struct */ 511 drm_mode->hdisplay = hdisplay_rnd; 512 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 513 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 514 drm_mode->htotal = total_pixels; 515 drm_mode->vdisplay = vdisplay_rnd; 516 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 517 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 518 drm_mode->vtotal = vtotal_lines; 519 520 drm_mode->clock = pixel_freq; 521 522 if (interlaced) { 523 drm_mode->vtotal *= 2; 524 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 525 } 526 527 drm_mode_set_name(drm_mode); 528 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 529 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 530 else 531 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 532 533 return drm_mode; 534 } 535 EXPORT_SYMBOL(drm_gtf_mode_complex); 536 537 /** 538 * drm_gtf_mode - create the modeline based on the GTF algorithm 539 * @dev: drm device 540 * @hdisplay: hdisplay size 541 * @vdisplay: vdisplay size 542 * @vrefresh: vrefresh rate. 543 * @interlaced: whether to compute an interlaced mode 544 * @margins: desired margin (borders) size 545 * 546 * return the modeline based on GTF algorithm 547 * 548 * This function is to create the modeline based on the GTF algorithm. 549 * Generalized Timing Formula is derived from: 550 * 551 * GTF Spreadsheet by Andy Morrish (1/5/97) 552 * available at https://www.vesa.org 553 * 554 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 555 * What I have done is to translate it by using integer calculation. 556 * I also refer to the function of fb_get_mode in the file of 557 * drivers/video/fbmon.c 558 * 559 * Standard GTF parameters:: 560 * 561 * M = 600 562 * C = 40 563 * K = 128 564 * J = 20 565 * 566 * Returns: 567 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 568 * The display mode object is allocated with drm_mode_create(). Returns NULL 569 * when no mode could be allocated. 570 */ 571 struct drm_display_mode * 572 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 573 bool interlaced, int margins) 574 { 575 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 576 interlaced, margins, 577 600, 40 * 2, 128, 20 * 2); 578 } 579 EXPORT_SYMBOL(drm_gtf_mode); 580 581 #ifdef CONFIG_VIDEOMODE_HELPERS 582 /** 583 * drm_display_mode_from_videomode - fill in @dmode using @vm, 584 * @vm: videomode structure to use as source 585 * @dmode: drm_display_mode structure to use as destination 586 * 587 * Fills out @dmode using the display mode specified in @vm. 588 */ 589 void drm_display_mode_from_videomode(const struct videomode *vm, 590 struct drm_display_mode *dmode) 591 { 592 dmode->hdisplay = vm->hactive; 593 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 594 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 595 dmode->htotal = dmode->hsync_end + vm->hback_porch; 596 597 dmode->vdisplay = vm->vactive; 598 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 599 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 600 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 601 602 dmode->clock = vm->pixelclock / 1000; 603 604 dmode->flags = 0; 605 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 606 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 607 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 608 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 609 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 610 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 611 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 612 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 613 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 614 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 615 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 616 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 617 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 618 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 619 drm_mode_set_name(dmode); 620 } 621 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 622 623 /** 624 * drm_display_mode_to_videomode - fill in @vm using @dmode, 625 * @dmode: drm_display_mode structure to use as source 626 * @vm: videomode structure to use as destination 627 * 628 * Fills out @vm using the display mode specified in @dmode. 629 */ 630 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 631 struct videomode *vm) 632 { 633 vm->hactive = dmode->hdisplay; 634 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 635 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 636 vm->hback_porch = dmode->htotal - dmode->hsync_end; 637 638 vm->vactive = dmode->vdisplay; 639 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 640 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 641 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 642 643 vm->pixelclock = dmode->clock * 1000; 644 645 vm->flags = 0; 646 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 647 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 648 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 649 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 650 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 651 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 652 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 653 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 654 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 655 vm->flags |= DISPLAY_FLAGS_INTERLACED; 656 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 657 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 658 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 659 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 660 } 661 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 662 663 /** 664 * drm_bus_flags_from_videomode - extract information about pixelclk and 665 * DE polarity from videomode and store it in a separate variable 666 * @vm: videomode structure to use 667 * @bus_flags: information about pixelclk, sync and DE polarity will be stored 668 * here 669 * 670 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH), DRM_BUS_FLAG_PIXDATA_DRIVE_(POS|NEG)EDGE 671 * and DISPLAY_FLAGS_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS 672 * found in @vm 673 */ 674 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) 675 { 676 *bus_flags = 0; 677 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) 678 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE; 679 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 680 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; 681 682 if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE) 683 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE; 684 if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE) 685 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE; 686 687 if (vm->flags & DISPLAY_FLAGS_DE_LOW) 688 *bus_flags |= DRM_BUS_FLAG_DE_LOW; 689 if (vm->flags & DISPLAY_FLAGS_DE_HIGH) 690 *bus_flags |= DRM_BUS_FLAG_DE_HIGH; 691 } 692 EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); 693 694 #ifdef CONFIG_OF 695 /** 696 * of_get_drm_display_mode - get a drm_display_mode from devicetree 697 * @np: device_node with the timing specification 698 * @dmode: will be set to the return value 699 * @bus_flags: information about pixelclk, sync and DE polarity 700 * @index: index into the list of display timings in devicetree 701 * 702 * This function is expensive and should only be used, if only one mode is to be 703 * read from DT. To get multiple modes start with of_get_display_timings and 704 * work with that instead. 705 * 706 * Returns: 707 * 0 on success, a negative errno code when no of videomode node was found. 708 */ 709 int of_get_drm_display_mode(struct device_node *np, 710 struct drm_display_mode *dmode, u32 *bus_flags, 711 int index) 712 { 713 struct videomode vm; 714 int ret; 715 716 ret = of_get_videomode(np, &vm, index); 717 if (ret) 718 return ret; 719 720 drm_display_mode_from_videomode(&vm, dmode); 721 if (bus_flags) 722 drm_bus_flags_from_videomode(&vm, bus_flags); 723 724 pr_debug("%pOF: got %dx%d display mode\n", 725 np, vm.hactive, vm.vactive); 726 drm_mode_debug_printmodeline(dmode); 727 728 return 0; 729 } 730 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 731 732 /** 733 * of_get_drm_panel_display_mode - get a panel-timing drm_display_mode from devicetree 734 * @np: device_node with the panel-timing specification 735 * @dmode: will be set to the return value 736 * @bus_flags: information about pixelclk, sync and DE polarity 737 * 738 * The mandatory Device Tree properties width-mm and height-mm 739 * are read and set on the display mode. 740 * 741 * Returns: 742 * Zero on success, negative error code on failure. 743 */ 744 int of_get_drm_panel_display_mode(struct device_node *np, 745 struct drm_display_mode *dmode, u32 *bus_flags) 746 { 747 u32 width_mm = 0, height_mm = 0; 748 struct display_timing timing; 749 struct videomode vm; 750 int ret; 751 752 ret = of_get_display_timing(np, "panel-timing", &timing); 753 if (ret) 754 return ret; 755 756 videomode_from_timing(&timing, &vm); 757 758 memset(dmode, 0, sizeof(*dmode)); 759 drm_display_mode_from_videomode(&vm, dmode); 760 if (bus_flags) 761 drm_bus_flags_from_videomode(&vm, bus_flags); 762 763 ret = of_property_read_u32(np, "width-mm", &width_mm); 764 if (ret) 765 return ret; 766 767 ret = of_property_read_u32(np, "height-mm", &height_mm); 768 if (ret) 769 return ret; 770 771 dmode->width_mm = width_mm; 772 dmode->height_mm = height_mm; 773 774 drm_mode_debug_printmodeline(dmode); 775 776 return 0; 777 } 778 EXPORT_SYMBOL_GPL(of_get_drm_panel_display_mode); 779 #endif /* CONFIG_OF */ 780 #endif /* CONFIG_VIDEOMODE_HELPERS */ 781 782 /** 783 * drm_mode_set_name - set the name on a mode 784 * @mode: name will be set in this mode 785 * 786 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 787 * with an optional 'i' suffix for interlaced modes. 788 */ 789 void drm_mode_set_name(struct drm_display_mode *mode) 790 { 791 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 792 793 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 794 mode->hdisplay, mode->vdisplay, 795 interlaced ? "i" : ""); 796 } 797 EXPORT_SYMBOL(drm_mode_set_name); 798 799 /** 800 * drm_mode_vrefresh - get the vrefresh of a mode 801 * @mode: mode 802 * 803 * Returns: 804 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 805 * value first if it is not yet set. 806 */ 807 int drm_mode_vrefresh(const struct drm_display_mode *mode) 808 { 809 unsigned int num, den; 810 811 if (mode->htotal == 0 || mode->vtotal == 0) 812 return 0; 813 814 num = mode->clock; 815 den = mode->htotal * mode->vtotal; 816 817 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 818 num *= 2; 819 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 820 den *= 2; 821 if (mode->vscan > 1) 822 den *= mode->vscan; 823 824 return DIV_ROUND_CLOSEST_ULL(mul_u32_u32(num, 1000), den); 825 } 826 EXPORT_SYMBOL(drm_mode_vrefresh); 827 828 /** 829 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode 830 * @mode: mode to query 831 * @hdisplay: hdisplay value to fill in 832 * @vdisplay: vdisplay value to fill in 833 * 834 * The vdisplay value will be doubled if the specified mode is a stereo mode of 835 * the appropriate layout. 836 */ 837 void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 838 int *hdisplay, int *vdisplay) 839 { 840 struct drm_display_mode adjusted; 841 842 drm_mode_init(&adjusted, mode); 843 844 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 845 *hdisplay = adjusted.crtc_hdisplay; 846 *vdisplay = adjusted.crtc_vdisplay; 847 } 848 EXPORT_SYMBOL(drm_mode_get_hv_timing); 849 850 /** 851 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 852 * @p: mode 853 * @adjust_flags: a combination of adjustment flags 854 * 855 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 856 * 857 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 858 * interlaced modes. 859 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 860 * buffers containing two eyes (only adjust the timings when needed, eg. for 861 * "frame packing" or "side by side full"). 862 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 863 * be performed for doublescan and vscan > 1 modes respectively. 864 */ 865 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 866 { 867 if (!p) 868 return; 869 870 p->crtc_clock = p->clock; 871 p->crtc_hdisplay = p->hdisplay; 872 p->crtc_hsync_start = p->hsync_start; 873 p->crtc_hsync_end = p->hsync_end; 874 p->crtc_htotal = p->htotal; 875 p->crtc_hskew = p->hskew; 876 p->crtc_vdisplay = p->vdisplay; 877 p->crtc_vsync_start = p->vsync_start; 878 p->crtc_vsync_end = p->vsync_end; 879 p->crtc_vtotal = p->vtotal; 880 881 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 882 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 883 p->crtc_vdisplay /= 2; 884 p->crtc_vsync_start /= 2; 885 p->crtc_vsync_end /= 2; 886 p->crtc_vtotal /= 2; 887 } 888 } 889 890 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 891 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 892 p->crtc_vdisplay *= 2; 893 p->crtc_vsync_start *= 2; 894 p->crtc_vsync_end *= 2; 895 p->crtc_vtotal *= 2; 896 } 897 } 898 899 if (!(adjust_flags & CRTC_NO_VSCAN)) { 900 if (p->vscan > 1) { 901 p->crtc_vdisplay *= p->vscan; 902 p->crtc_vsync_start *= p->vscan; 903 p->crtc_vsync_end *= p->vscan; 904 p->crtc_vtotal *= p->vscan; 905 } 906 } 907 908 if (adjust_flags & CRTC_STEREO_DOUBLE) { 909 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 910 911 switch (layout) { 912 case DRM_MODE_FLAG_3D_FRAME_PACKING: 913 p->crtc_clock *= 2; 914 p->crtc_vdisplay += p->crtc_vtotal; 915 p->crtc_vsync_start += p->crtc_vtotal; 916 p->crtc_vsync_end += p->crtc_vtotal; 917 p->crtc_vtotal += p->crtc_vtotal; 918 break; 919 } 920 } 921 922 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 923 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 924 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 925 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 926 } 927 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 928 929 /** 930 * drm_mode_copy - copy the mode 931 * @dst: mode to overwrite 932 * @src: mode to copy 933 * 934 * Copy an existing mode into another mode, preserving the 935 * list head of the destination mode. 936 */ 937 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 938 { 939 struct list_head head = dst->head; 940 941 *dst = *src; 942 dst->head = head; 943 } 944 EXPORT_SYMBOL(drm_mode_copy); 945 946 /** 947 * drm_mode_init - initialize the mode from another mode 948 * @dst: mode to overwrite 949 * @src: mode to copy 950 * 951 * Copy an existing mode into another mode, zeroing the 952 * list head of the destination mode. Typically used 953 * to guarantee the list head is not left with stack 954 * garbage in on-stack modes. 955 */ 956 void drm_mode_init(struct drm_display_mode *dst, const struct drm_display_mode *src) 957 { 958 memset(dst, 0, sizeof(*dst)); 959 drm_mode_copy(dst, src); 960 } 961 EXPORT_SYMBOL(drm_mode_init); 962 963 /** 964 * drm_mode_duplicate - allocate and duplicate an existing mode 965 * @dev: drm_device to allocate the duplicated mode for 966 * @mode: mode to duplicate 967 * 968 * Just allocate a new mode, copy the existing mode into it, and return 969 * a pointer to it. Used to create new instances of established modes. 970 * 971 * Returns: 972 * Pointer to duplicated mode on success, NULL on error. 973 */ 974 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 975 const struct drm_display_mode *mode) 976 { 977 struct drm_display_mode *nmode; 978 979 nmode = drm_mode_create(dev); 980 if (!nmode) 981 return NULL; 982 983 drm_mode_copy(nmode, mode); 984 985 return nmode; 986 } 987 EXPORT_SYMBOL(drm_mode_duplicate); 988 989 static bool drm_mode_match_timings(const struct drm_display_mode *mode1, 990 const struct drm_display_mode *mode2) 991 { 992 return mode1->hdisplay == mode2->hdisplay && 993 mode1->hsync_start == mode2->hsync_start && 994 mode1->hsync_end == mode2->hsync_end && 995 mode1->htotal == mode2->htotal && 996 mode1->hskew == mode2->hskew && 997 mode1->vdisplay == mode2->vdisplay && 998 mode1->vsync_start == mode2->vsync_start && 999 mode1->vsync_end == mode2->vsync_end && 1000 mode1->vtotal == mode2->vtotal && 1001 mode1->vscan == mode2->vscan; 1002 } 1003 1004 static bool drm_mode_match_clock(const struct drm_display_mode *mode1, 1005 const struct drm_display_mode *mode2) 1006 { 1007 /* 1008 * do clock check convert to PICOS 1009 * so fb modes get matched the same 1010 */ 1011 if (mode1->clock && mode2->clock) 1012 return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock); 1013 else 1014 return mode1->clock == mode2->clock; 1015 } 1016 1017 static bool drm_mode_match_flags(const struct drm_display_mode *mode1, 1018 const struct drm_display_mode *mode2) 1019 { 1020 return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 1021 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK); 1022 } 1023 1024 static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1, 1025 const struct drm_display_mode *mode2) 1026 { 1027 return (mode1->flags & DRM_MODE_FLAG_3D_MASK) == 1028 (mode2->flags & DRM_MODE_FLAG_3D_MASK); 1029 } 1030 1031 static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1, 1032 const struct drm_display_mode *mode2) 1033 { 1034 return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio; 1035 } 1036 1037 /** 1038 * drm_mode_match - test modes for (partial) equality 1039 * @mode1: first mode 1040 * @mode2: second mode 1041 * @match_flags: which parts need to match (DRM_MODE_MATCH_*) 1042 * 1043 * Check to see if @mode1 and @mode2 are equivalent. 1044 * 1045 * Returns: 1046 * True if the modes are (partially) equal, false otherwise. 1047 */ 1048 bool drm_mode_match(const struct drm_display_mode *mode1, 1049 const struct drm_display_mode *mode2, 1050 unsigned int match_flags) 1051 { 1052 if (!mode1 && !mode2) 1053 return true; 1054 1055 if (!mode1 || !mode2) 1056 return false; 1057 1058 if (match_flags & DRM_MODE_MATCH_TIMINGS && 1059 !drm_mode_match_timings(mode1, mode2)) 1060 return false; 1061 1062 if (match_flags & DRM_MODE_MATCH_CLOCK && 1063 !drm_mode_match_clock(mode1, mode2)) 1064 return false; 1065 1066 if (match_flags & DRM_MODE_MATCH_FLAGS && 1067 !drm_mode_match_flags(mode1, mode2)) 1068 return false; 1069 1070 if (match_flags & DRM_MODE_MATCH_3D_FLAGS && 1071 !drm_mode_match_3d_flags(mode1, mode2)) 1072 return false; 1073 1074 if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO && 1075 !drm_mode_match_aspect_ratio(mode1, mode2)) 1076 return false; 1077 1078 return true; 1079 } 1080 EXPORT_SYMBOL(drm_mode_match); 1081 1082 /** 1083 * drm_mode_equal - test modes for equality 1084 * @mode1: first mode 1085 * @mode2: second mode 1086 * 1087 * Check to see if @mode1 and @mode2 are equivalent. 1088 * 1089 * Returns: 1090 * True if the modes are equal, false otherwise. 1091 */ 1092 bool drm_mode_equal(const struct drm_display_mode *mode1, 1093 const struct drm_display_mode *mode2) 1094 { 1095 return drm_mode_match(mode1, mode2, 1096 DRM_MODE_MATCH_TIMINGS | 1097 DRM_MODE_MATCH_CLOCK | 1098 DRM_MODE_MATCH_FLAGS | 1099 DRM_MODE_MATCH_3D_FLAGS| 1100 DRM_MODE_MATCH_ASPECT_RATIO); 1101 } 1102 EXPORT_SYMBOL(drm_mode_equal); 1103 1104 /** 1105 * drm_mode_equal_no_clocks - test modes for equality 1106 * @mode1: first mode 1107 * @mode2: second mode 1108 * 1109 * Check to see if @mode1 and @mode2 are equivalent, but 1110 * don't check the pixel clocks. 1111 * 1112 * Returns: 1113 * True if the modes are equal, false otherwise. 1114 */ 1115 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, 1116 const struct drm_display_mode *mode2) 1117 { 1118 return drm_mode_match(mode1, mode2, 1119 DRM_MODE_MATCH_TIMINGS | 1120 DRM_MODE_MATCH_FLAGS | 1121 DRM_MODE_MATCH_3D_FLAGS); 1122 } 1123 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 1124 1125 /** 1126 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 1127 * @mode1: first mode 1128 * @mode2: second mode 1129 * 1130 * Check to see if @mode1 and @mode2 are equivalent, but 1131 * don't check the pixel clocks nor the stereo layout. 1132 * 1133 * Returns: 1134 * True if the modes are equal, false otherwise. 1135 */ 1136 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 1137 const struct drm_display_mode *mode2) 1138 { 1139 return drm_mode_match(mode1, mode2, 1140 DRM_MODE_MATCH_TIMINGS | 1141 DRM_MODE_MATCH_FLAGS); 1142 } 1143 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1144 1145 static enum drm_mode_status 1146 drm_mode_validate_basic(const struct drm_display_mode *mode) 1147 { 1148 if (mode->type & ~DRM_MODE_TYPE_ALL) 1149 return MODE_BAD; 1150 1151 if (mode->flags & ~DRM_MODE_FLAG_ALL) 1152 return MODE_BAD; 1153 1154 if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1155 return MODE_BAD; 1156 1157 if (mode->clock == 0) 1158 return MODE_CLOCK_LOW; 1159 1160 if (mode->hdisplay == 0 || 1161 mode->hsync_start < mode->hdisplay || 1162 mode->hsync_end < mode->hsync_start || 1163 mode->htotal < mode->hsync_end) 1164 return MODE_H_ILLEGAL; 1165 1166 if (mode->vdisplay == 0 || 1167 mode->vsync_start < mode->vdisplay || 1168 mode->vsync_end < mode->vsync_start || 1169 mode->vtotal < mode->vsync_end) 1170 return MODE_V_ILLEGAL; 1171 1172 return MODE_OK; 1173 } 1174 1175 /** 1176 * drm_mode_validate_driver - make sure the mode is somewhat sane 1177 * @dev: drm device 1178 * @mode: mode to check 1179 * 1180 * First do basic validation on the mode, and then allow the driver 1181 * to check for device/driver specific limitations via the optional 1182 * &drm_mode_config_helper_funcs.mode_valid hook. 1183 * 1184 * Returns: 1185 * The mode status 1186 */ 1187 enum drm_mode_status 1188 drm_mode_validate_driver(struct drm_device *dev, 1189 const struct drm_display_mode *mode) 1190 { 1191 enum drm_mode_status status; 1192 1193 status = drm_mode_validate_basic(mode); 1194 if (status != MODE_OK) 1195 return status; 1196 1197 if (dev->mode_config.funcs->mode_valid) 1198 return dev->mode_config.funcs->mode_valid(dev, mode); 1199 else 1200 return MODE_OK; 1201 } 1202 EXPORT_SYMBOL(drm_mode_validate_driver); 1203 1204 /** 1205 * drm_mode_validate_size - make sure modes adhere to size constraints 1206 * @mode: mode to check 1207 * @maxX: maximum width 1208 * @maxY: maximum height 1209 * 1210 * This function is a helper which can be used to validate modes against size 1211 * limitations of the DRM device/connector. If a mode is too big its status 1212 * member is updated with the appropriate validation failure code. The list 1213 * itself is not changed. 1214 * 1215 * Returns: 1216 * The mode status 1217 */ 1218 enum drm_mode_status 1219 drm_mode_validate_size(const struct drm_display_mode *mode, 1220 int maxX, int maxY) 1221 { 1222 if (maxX > 0 && mode->hdisplay > maxX) 1223 return MODE_VIRTUAL_X; 1224 1225 if (maxY > 0 && mode->vdisplay > maxY) 1226 return MODE_VIRTUAL_Y; 1227 1228 return MODE_OK; 1229 } 1230 EXPORT_SYMBOL(drm_mode_validate_size); 1231 1232 /** 1233 * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed 1234 * @mode: mode to check 1235 * @connector: drm connector under action 1236 * 1237 * This function is a helper which can be used to filter out any YCBCR420 1238 * only mode, when the source doesn't support it. 1239 * 1240 * Returns: 1241 * The mode status 1242 */ 1243 enum drm_mode_status 1244 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode, 1245 struct drm_connector *connector) 1246 { 1247 if (!connector->ycbcr_420_allowed && 1248 drm_mode_is_420_only(&connector->display_info, mode)) 1249 return MODE_NO_420; 1250 1251 return MODE_OK; 1252 } 1253 EXPORT_SYMBOL(drm_mode_validate_ycbcr420); 1254 1255 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1256 1257 static const char * const drm_mode_status_names[] = { 1258 MODE_STATUS(OK), 1259 MODE_STATUS(HSYNC), 1260 MODE_STATUS(VSYNC), 1261 MODE_STATUS(H_ILLEGAL), 1262 MODE_STATUS(V_ILLEGAL), 1263 MODE_STATUS(BAD_WIDTH), 1264 MODE_STATUS(NOMODE), 1265 MODE_STATUS(NO_INTERLACE), 1266 MODE_STATUS(NO_DBLESCAN), 1267 MODE_STATUS(NO_VSCAN), 1268 MODE_STATUS(MEM), 1269 MODE_STATUS(VIRTUAL_X), 1270 MODE_STATUS(VIRTUAL_Y), 1271 MODE_STATUS(MEM_VIRT), 1272 MODE_STATUS(NOCLOCK), 1273 MODE_STATUS(CLOCK_HIGH), 1274 MODE_STATUS(CLOCK_LOW), 1275 MODE_STATUS(CLOCK_RANGE), 1276 MODE_STATUS(BAD_HVALUE), 1277 MODE_STATUS(BAD_VVALUE), 1278 MODE_STATUS(BAD_VSCAN), 1279 MODE_STATUS(HSYNC_NARROW), 1280 MODE_STATUS(HSYNC_WIDE), 1281 MODE_STATUS(HBLANK_NARROW), 1282 MODE_STATUS(HBLANK_WIDE), 1283 MODE_STATUS(VSYNC_NARROW), 1284 MODE_STATUS(VSYNC_WIDE), 1285 MODE_STATUS(VBLANK_NARROW), 1286 MODE_STATUS(VBLANK_WIDE), 1287 MODE_STATUS(PANEL), 1288 MODE_STATUS(INTERLACE_WIDTH), 1289 MODE_STATUS(ONE_WIDTH), 1290 MODE_STATUS(ONE_HEIGHT), 1291 MODE_STATUS(ONE_SIZE), 1292 MODE_STATUS(NO_REDUCED), 1293 MODE_STATUS(NO_STEREO), 1294 MODE_STATUS(NO_420), 1295 MODE_STATUS(STALE), 1296 MODE_STATUS(BAD), 1297 MODE_STATUS(ERROR), 1298 }; 1299 1300 #undef MODE_STATUS 1301 1302 const char *drm_get_mode_status_name(enum drm_mode_status status) 1303 { 1304 int index = status + 3; 1305 1306 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1307 return ""; 1308 1309 return drm_mode_status_names[index]; 1310 } 1311 1312 /** 1313 * drm_mode_prune_invalid - remove invalid modes from mode list 1314 * @dev: DRM device 1315 * @mode_list: list of modes to check 1316 * @verbose: be verbose about it 1317 * 1318 * This helper function can be used to prune a display mode list after 1319 * validation has been completed. All modes whose status is not MODE_OK will be 1320 * removed from the list, and if @verbose the status code and mode name is also 1321 * printed to dmesg. 1322 */ 1323 void drm_mode_prune_invalid(struct drm_device *dev, 1324 struct list_head *mode_list, bool verbose) 1325 { 1326 struct drm_display_mode *mode, *t; 1327 1328 list_for_each_entry_safe(mode, t, mode_list, head) { 1329 if (mode->status != MODE_OK) { 1330 list_del(&mode->head); 1331 if (verbose) { 1332 drm_mode_debug_printmodeline(mode); 1333 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1334 mode->name, 1335 drm_get_mode_status_name(mode->status)); 1336 } 1337 drm_mode_destroy(dev, mode); 1338 } 1339 } 1340 } 1341 EXPORT_SYMBOL(drm_mode_prune_invalid); 1342 1343 /** 1344 * drm_mode_compare - compare modes for favorability 1345 * @priv: unused 1346 * @lh_a: list_head for first mode 1347 * @lh_b: list_head for second mode 1348 * 1349 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1350 * which is better. 1351 * 1352 * Returns: 1353 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1354 * positive if @lh_b is better than @lh_a. 1355 */ 1356 static int drm_mode_compare(void *priv, const struct list_head *lh_a, 1357 const struct list_head *lh_b) 1358 { 1359 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1360 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1361 int diff; 1362 1363 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1364 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1365 if (diff) 1366 return diff; 1367 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1368 if (diff) 1369 return diff; 1370 1371 diff = drm_mode_vrefresh(b) - drm_mode_vrefresh(a); 1372 if (diff) 1373 return diff; 1374 1375 diff = b->clock - a->clock; 1376 return diff; 1377 } 1378 1379 /** 1380 * drm_mode_sort - sort mode list 1381 * @mode_list: list of drm_display_mode structures to sort 1382 * 1383 * Sort @mode_list by favorability, moving good modes to the head of the list. 1384 */ 1385 void drm_mode_sort(struct list_head *mode_list) 1386 { 1387 list_sort(NULL, mode_list, drm_mode_compare); 1388 } 1389 EXPORT_SYMBOL(drm_mode_sort); 1390 1391 /** 1392 * drm_connector_list_update - update the mode list for the connector 1393 * @connector: the connector to update 1394 * 1395 * This moves the modes from the @connector probed_modes list 1396 * to the actual mode list. It compares the probed mode against the current 1397 * list and only adds different/new modes. 1398 * 1399 * This is just a helper functions doesn't validate any modes itself and also 1400 * doesn't prune any invalid modes. Callers need to do that themselves. 1401 */ 1402 void drm_connector_list_update(struct drm_connector *connector) 1403 { 1404 struct drm_display_mode *pmode, *pt; 1405 1406 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1407 1408 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1409 struct drm_display_mode *mode; 1410 bool found_it = false; 1411 1412 /* go through current modes checking for the new probed mode */ 1413 list_for_each_entry(mode, &connector->modes, head) { 1414 if (!drm_mode_equal(pmode, mode)) 1415 continue; 1416 1417 found_it = true; 1418 1419 /* 1420 * If the old matching mode is stale (ie. left over 1421 * from a previous probe) just replace it outright. 1422 * Otherwise just merge the type bits between all 1423 * equal probed modes. 1424 * 1425 * If two probed modes are considered equal, pick the 1426 * actual timings from the one that's marked as 1427 * preferred (in case the match isn't 100%). If 1428 * multiple or zero preferred modes are present, favor 1429 * the mode added to the probed_modes list first. 1430 */ 1431 if (mode->status == MODE_STALE) { 1432 drm_mode_copy(mode, pmode); 1433 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1434 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1435 pmode->type |= mode->type; 1436 drm_mode_copy(mode, pmode); 1437 } else { 1438 mode->type |= pmode->type; 1439 } 1440 1441 list_del(&pmode->head); 1442 drm_mode_destroy(connector->dev, pmode); 1443 break; 1444 } 1445 1446 if (!found_it) { 1447 list_move_tail(&pmode->head, &connector->modes); 1448 } 1449 } 1450 } 1451 EXPORT_SYMBOL(drm_connector_list_update); 1452 1453 static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, 1454 struct drm_cmdline_mode *mode) 1455 { 1456 unsigned int bpp; 1457 1458 if (str[0] != '-') 1459 return -EINVAL; 1460 1461 str++; 1462 bpp = simple_strtol(str, end_ptr, 10); 1463 if (*end_ptr == str) 1464 return -EINVAL; 1465 1466 mode->bpp = bpp; 1467 mode->bpp_specified = true; 1468 1469 return 0; 1470 } 1471 1472 static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, 1473 struct drm_cmdline_mode *mode) 1474 { 1475 unsigned int refresh; 1476 1477 if (str[0] != '@') 1478 return -EINVAL; 1479 1480 str++; 1481 refresh = simple_strtol(str, end_ptr, 10); 1482 if (*end_ptr == str) 1483 return -EINVAL; 1484 1485 mode->refresh = refresh; 1486 mode->refresh_specified = true; 1487 1488 return 0; 1489 } 1490 1491 static int drm_mode_parse_cmdline_extra(const char *str, int length, 1492 bool freestanding, 1493 const struct drm_connector *connector, 1494 struct drm_cmdline_mode *mode) 1495 { 1496 int i; 1497 1498 for (i = 0; i < length; i++) { 1499 switch (str[i]) { 1500 case 'i': 1501 if (freestanding) 1502 return -EINVAL; 1503 1504 mode->interlace = true; 1505 break; 1506 case 'm': 1507 if (freestanding) 1508 return -EINVAL; 1509 1510 mode->margins = true; 1511 break; 1512 case 'D': 1513 if (mode->force != DRM_FORCE_UNSPECIFIED) 1514 return -EINVAL; 1515 1516 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1517 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1518 mode->force = DRM_FORCE_ON; 1519 else 1520 mode->force = DRM_FORCE_ON_DIGITAL; 1521 break; 1522 case 'd': 1523 if (mode->force != DRM_FORCE_UNSPECIFIED) 1524 return -EINVAL; 1525 1526 mode->force = DRM_FORCE_OFF; 1527 break; 1528 case 'e': 1529 if (mode->force != DRM_FORCE_UNSPECIFIED) 1530 return -EINVAL; 1531 1532 mode->force = DRM_FORCE_ON; 1533 break; 1534 default: 1535 return -EINVAL; 1536 } 1537 } 1538 1539 return 0; 1540 } 1541 1542 static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, 1543 bool extras, 1544 const struct drm_connector *connector, 1545 struct drm_cmdline_mode *mode) 1546 { 1547 const char *str_start = str; 1548 bool rb = false, cvt = false; 1549 int xres = 0, yres = 0; 1550 int remaining, i; 1551 char *end_ptr; 1552 1553 xres = simple_strtol(str, &end_ptr, 10); 1554 if (end_ptr == str) 1555 return -EINVAL; 1556 1557 if (end_ptr[0] != 'x') 1558 return -EINVAL; 1559 end_ptr++; 1560 1561 str = end_ptr; 1562 yres = simple_strtol(str, &end_ptr, 10); 1563 if (end_ptr == str) 1564 return -EINVAL; 1565 1566 remaining = length - (end_ptr - str_start); 1567 if (remaining < 0) 1568 return -EINVAL; 1569 1570 for (i = 0; i < remaining; i++) { 1571 switch (end_ptr[i]) { 1572 case 'M': 1573 cvt = true; 1574 break; 1575 case 'R': 1576 rb = true; 1577 break; 1578 default: 1579 /* 1580 * Try to pass that to our extras parsing 1581 * function to handle the case where the 1582 * extras are directly after the resolution 1583 */ 1584 if (extras) { 1585 int ret = drm_mode_parse_cmdline_extra(end_ptr + i, 1586 1, 1587 false, 1588 connector, 1589 mode); 1590 if (ret) 1591 return ret; 1592 } else { 1593 return -EINVAL; 1594 } 1595 } 1596 } 1597 1598 mode->xres = xres; 1599 mode->yres = yres; 1600 mode->cvt = cvt; 1601 mode->rb = rb; 1602 1603 return 0; 1604 } 1605 1606 static int drm_mode_parse_cmdline_int(const char *delim, unsigned int *int_ret) 1607 { 1608 const char *value; 1609 char *endp; 1610 1611 /* 1612 * delim must point to the '=', otherwise it is a syntax error and 1613 * if delim points to the terminating zero, then delim + 1 will point 1614 * past the end of the string. 1615 */ 1616 if (*delim != '=') 1617 return -EINVAL; 1618 1619 value = delim + 1; 1620 *int_ret = simple_strtol(value, &endp, 10); 1621 1622 /* Make sure we have parsed something */ 1623 if (endp == value) 1624 return -EINVAL; 1625 1626 return 0; 1627 } 1628 1629 static int drm_mode_parse_panel_orientation(const char *delim, 1630 struct drm_cmdline_mode *mode) 1631 { 1632 const char *value; 1633 1634 if (*delim != '=') 1635 return -EINVAL; 1636 1637 value = delim + 1; 1638 delim = strchr(value, ','); 1639 if (!delim) 1640 delim = value + strlen(value); 1641 1642 if (!strncmp(value, "normal", delim - value)) 1643 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL; 1644 else if (!strncmp(value, "upside_down", delim - value)) 1645 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP; 1646 else if (!strncmp(value, "left_side_up", delim - value)) 1647 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP; 1648 else if (!strncmp(value, "right_side_up", delim - value)) 1649 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP; 1650 else 1651 return -EINVAL; 1652 1653 return 0; 1654 } 1655 1656 static int drm_mode_parse_cmdline_options(const char *str, 1657 bool freestanding, 1658 const struct drm_connector *connector, 1659 struct drm_cmdline_mode *mode) 1660 { 1661 unsigned int deg, margin, rotation = 0; 1662 const char *delim, *option, *sep; 1663 1664 option = str; 1665 do { 1666 delim = strchr(option, '='); 1667 if (!delim) { 1668 delim = strchr(option, ','); 1669 1670 if (!delim) 1671 delim = option + strlen(option); 1672 } 1673 1674 if (!strncmp(option, "rotate", delim - option)) { 1675 if (drm_mode_parse_cmdline_int(delim, °)) 1676 return -EINVAL; 1677 1678 switch (deg) { 1679 case 0: 1680 rotation |= DRM_MODE_ROTATE_0; 1681 break; 1682 1683 case 90: 1684 rotation |= DRM_MODE_ROTATE_90; 1685 break; 1686 1687 case 180: 1688 rotation |= DRM_MODE_ROTATE_180; 1689 break; 1690 1691 case 270: 1692 rotation |= DRM_MODE_ROTATE_270; 1693 break; 1694 1695 default: 1696 return -EINVAL; 1697 } 1698 } else if (!strncmp(option, "reflect_x", delim - option)) { 1699 rotation |= DRM_MODE_REFLECT_X; 1700 } else if (!strncmp(option, "reflect_y", delim - option)) { 1701 rotation |= DRM_MODE_REFLECT_Y; 1702 } else if (!strncmp(option, "margin_right", delim - option)) { 1703 if (drm_mode_parse_cmdline_int(delim, &margin)) 1704 return -EINVAL; 1705 1706 mode->tv_margins.right = margin; 1707 } else if (!strncmp(option, "margin_left", delim - option)) { 1708 if (drm_mode_parse_cmdline_int(delim, &margin)) 1709 return -EINVAL; 1710 1711 mode->tv_margins.left = margin; 1712 } else if (!strncmp(option, "margin_top", delim - option)) { 1713 if (drm_mode_parse_cmdline_int(delim, &margin)) 1714 return -EINVAL; 1715 1716 mode->tv_margins.top = margin; 1717 } else if (!strncmp(option, "margin_bottom", delim - option)) { 1718 if (drm_mode_parse_cmdline_int(delim, &margin)) 1719 return -EINVAL; 1720 1721 mode->tv_margins.bottom = margin; 1722 } else if (!strncmp(option, "panel_orientation", delim - option)) { 1723 if (drm_mode_parse_panel_orientation(delim, mode)) 1724 return -EINVAL; 1725 } else { 1726 return -EINVAL; 1727 } 1728 sep = strchr(delim, ','); 1729 option = sep + 1; 1730 } while (sep); 1731 1732 if (rotation && freestanding) 1733 return -EINVAL; 1734 1735 if (!(rotation & DRM_MODE_ROTATE_MASK)) 1736 rotation |= DRM_MODE_ROTATE_0; 1737 1738 /* Make sure there is exactly one rotation defined */ 1739 if (!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK)) 1740 return -EINVAL; 1741 1742 mode->rotation_reflection = rotation; 1743 1744 return 0; 1745 } 1746 1747 static const char * const drm_named_modes_whitelist[] = { 1748 "NTSC", 1749 "PAL", 1750 }; 1751 1752 /** 1753 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1754 * @mode_option: optional per connector mode option 1755 * @connector: connector to parse modeline for 1756 * @mode: preallocated drm_cmdline_mode structure to fill out 1757 * 1758 * This parses @mode_option command line modeline for modes and options to 1759 * configure the connector. If @mode_option is NULL the default command line 1760 * modeline in fb_mode_option will be parsed instead. 1761 * 1762 * This uses the same parameters as the fb modedb.c, except for an extra 1763 * force-enable, force-enable-digital and force-disable bit at the end:: 1764 * 1765 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1766 * 1767 * Additionals options can be provided following the mode, using a comma to 1768 * separate each option. Valid options can be found in 1769 * Documentation/fb/modedb.rst. 1770 * 1771 * The intermediate drm_cmdline_mode structure is required to store additional 1772 * options from the command line modline like the force-enable/disable flag. 1773 * 1774 * Returns: 1775 * True if a valid modeline has been parsed, false otherwise. 1776 */ 1777 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1778 const struct drm_connector *connector, 1779 struct drm_cmdline_mode *mode) 1780 { 1781 const char *name; 1782 bool freestanding = false, parse_extras = false; 1783 unsigned int bpp_off = 0, refresh_off = 0, options_off = 0; 1784 unsigned int mode_end = 0; 1785 const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; 1786 const char *options_ptr = NULL; 1787 char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; 1788 int i, len, ret; 1789 1790 memset(mode, 0, sizeof(*mode)); 1791 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 1792 1793 if (!mode_option) 1794 return false; 1795 1796 name = mode_option; 1797 1798 /* Try to locate the bpp and refresh specifiers, if any */ 1799 bpp_ptr = strchr(name, '-'); 1800 if (bpp_ptr) 1801 bpp_off = bpp_ptr - name; 1802 1803 refresh_ptr = strchr(name, '@'); 1804 if (refresh_ptr) 1805 refresh_off = refresh_ptr - name; 1806 1807 /* Locate the start of named options */ 1808 options_ptr = strchr(name, ','); 1809 if (options_ptr) 1810 options_off = options_ptr - name; 1811 1812 /* Locate the end of the name / resolution, and parse it */ 1813 if (bpp_ptr) { 1814 mode_end = bpp_off; 1815 } else if (refresh_ptr) { 1816 mode_end = refresh_off; 1817 } else if (options_ptr) { 1818 mode_end = options_off; 1819 parse_extras = true; 1820 } else { 1821 mode_end = strlen(name); 1822 parse_extras = true; 1823 } 1824 1825 /* First check for a named mode */ 1826 for (i = 0; i < ARRAY_SIZE(drm_named_modes_whitelist); i++) { 1827 ret = str_has_prefix(name, drm_named_modes_whitelist[i]); 1828 if (ret == mode_end) { 1829 if (refresh_ptr) 1830 return false; /* named + refresh is invalid */ 1831 1832 strcpy(mode->name, drm_named_modes_whitelist[i]); 1833 mode->specified = true; 1834 break; 1835 } 1836 } 1837 1838 /* No named mode? Check for a normal mode argument, e.g. 1024x768 */ 1839 if (!mode->specified && isdigit(name[0])) { 1840 ret = drm_mode_parse_cmdline_res_mode(name, mode_end, 1841 parse_extras, 1842 connector, 1843 mode); 1844 if (ret) 1845 return false; 1846 1847 mode->specified = true; 1848 } 1849 1850 /* No mode? Check for freestanding extras and/or options */ 1851 if (!mode->specified) { 1852 unsigned int len = strlen(mode_option); 1853 1854 if (bpp_ptr || refresh_ptr) 1855 return false; /* syntax error */ 1856 1857 if (len == 1 || (len >= 2 && mode_option[1] == ',')) 1858 extra_ptr = mode_option; 1859 else 1860 options_ptr = mode_option - 1; 1861 1862 freestanding = true; 1863 } 1864 1865 if (bpp_ptr) { 1866 ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); 1867 if (ret) 1868 return false; 1869 1870 mode->bpp_specified = true; 1871 } 1872 1873 if (refresh_ptr) { 1874 ret = drm_mode_parse_cmdline_refresh(refresh_ptr, 1875 &refresh_end_ptr, mode); 1876 if (ret) 1877 return false; 1878 1879 mode->refresh_specified = true; 1880 } 1881 1882 /* 1883 * Locate the end of the bpp / refresh, and parse the extras 1884 * if relevant 1885 */ 1886 if (bpp_ptr && refresh_ptr) 1887 extra_ptr = max(bpp_end_ptr, refresh_end_ptr); 1888 else if (bpp_ptr) 1889 extra_ptr = bpp_end_ptr; 1890 else if (refresh_ptr) 1891 extra_ptr = refresh_end_ptr; 1892 1893 if (extra_ptr) { 1894 if (options_ptr) 1895 len = options_ptr - extra_ptr; 1896 else 1897 len = strlen(extra_ptr); 1898 1899 ret = drm_mode_parse_cmdline_extra(extra_ptr, len, freestanding, 1900 connector, mode); 1901 if (ret) 1902 return false; 1903 } 1904 1905 if (options_ptr) { 1906 ret = drm_mode_parse_cmdline_options(options_ptr + 1, 1907 freestanding, 1908 connector, mode); 1909 if (ret) 1910 return false; 1911 } 1912 1913 return true; 1914 } 1915 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1916 1917 /** 1918 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1919 * @dev: DRM device to create the new mode for 1920 * @cmd: input command line modeline 1921 * 1922 * Returns: 1923 * Pointer to converted mode on success, NULL on error. 1924 */ 1925 struct drm_display_mode * 1926 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1927 struct drm_cmdline_mode *cmd) 1928 { 1929 struct drm_display_mode *mode; 1930 1931 if (cmd->xres == 0 || cmd->yres == 0) 1932 return NULL; 1933 1934 if (cmd->cvt) 1935 mode = drm_cvt_mode(dev, 1936 cmd->xres, cmd->yres, 1937 cmd->refresh_specified ? cmd->refresh : 60, 1938 cmd->rb, cmd->interlace, 1939 cmd->margins); 1940 else 1941 mode = drm_gtf_mode(dev, 1942 cmd->xres, cmd->yres, 1943 cmd->refresh_specified ? cmd->refresh : 60, 1944 cmd->interlace, 1945 cmd->margins); 1946 if (!mode) 1947 return NULL; 1948 1949 mode->type |= DRM_MODE_TYPE_USERDEF; 1950 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ 1951 if (cmd->xres == 1366) 1952 drm_mode_fixup_1366x768(mode); 1953 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1954 return mode; 1955 } 1956 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1957 1958 /** 1959 * drm_mode_convert_to_umode - convert a drm_display_mode into a modeinfo 1960 * @out: drm_mode_modeinfo struct to return to the user 1961 * @in: drm_display_mode to use 1962 * 1963 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1964 * the user. 1965 */ 1966 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1967 const struct drm_display_mode *in) 1968 { 1969 out->clock = in->clock; 1970 out->hdisplay = in->hdisplay; 1971 out->hsync_start = in->hsync_start; 1972 out->hsync_end = in->hsync_end; 1973 out->htotal = in->htotal; 1974 out->hskew = in->hskew; 1975 out->vdisplay = in->vdisplay; 1976 out->vsync_start = in->vsync_start; 1977 out->vsync_end = in->vsync_end; 1978 out->vtotal = in->vtotal; 1979 out->vscan = in->vscan; 1980 out->vrefresh = drm_mode_vrefresh(in); 1981 out->flags = in->flags; 1982 out->type = in->type; 1983 1984 switch (in->picture_aspect_ratio) { 1985 case HDMI_PICTURE_ASPECT_4_3: 1986 out->flags |= DRM_MODE_FLAG_PIC_AR_4_3; 1987 break; 1988 case HDMI_PICTURE_ASPECT_16_9: 1989 out->flags |= DRM_MODE_FLAG_PIC_AR_16_9; 1990 break; 1991 case HDMI_PICTURE_ASPECT_64_27: 1992 out->flags |= DRM_MODE_FLAG_PIC_AR_64_27; 1993 break; 1994 case HDMI_PICTURE_ASPECT_256_135: 1995 out->flags |= DRM_MODE_FLAG_PIC_AR_256_135; 1996 break; 1997 default: 1998 WARN(1, "Invalid aspect ratio (0%x) on mode\n", 1999 in->picture_aspect_ratio); 2000 fallthrough; 2001 case HDMI_PICTURE_ASPECT_NONE: 2002 out->flags |= DRM_MODE_FLAG_PIC_AR_NONE; 2003 break; 2004 } 2005 2006 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 2007 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 2008 } 2009 2010 /** 2011 * drm_mode_convert_umode - convert a modeinfo into a drm_display_mode 2012 * @dev: drm device 2013 * @out: drm_display_mode to return to the user 2014 * @in: drm_mode_modeinfo to use 2015 * 2016 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 2017 * the caller. 2018 * 2019 * Returns: 2020 * Zero on success, negative errno on failure. 2021 */ 2022 int drm_mode_convert_umode(struct drm_device *dev, 2023 struct drm_display_mode *out, 2024 const struct drm_mode_modeinfo *in) 2025 { 2026 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 2027 return -ERANGE; 2028 2029 out->clock = in->clock; 2030 out->hdisplay = in->hdisplay; 2031 out->hsync_start = in->hsync_start; 2032 out->hsync_end = in->hsync_end; 2033 out->htotal = in->htotal; 2034 out->hskew = in->hskew; 2035 out->vdisplay = in->vdisplay; 2036 out->vsync_start = in->vsync_start; 2037 out->vsync_end = in->vsync_end; 2038 out->vtotal = in->vtotal; 2039 out->vscan = in->vscan; 2040 out->flags = in->flags; 2041 /* 2042 * Old xf86-video-vmware (possibly others too) used to 2043 * leave 'type' uninitialized. Just ignore any bits we 2044 * don't like. It's a just hint after all, and more 2045 * useful for the kernel->userspace direction anyway. 2046 */ 2047 out->type = in->type & DRM_MODE_TYPE_ALL; 2048 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 2049 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 2050 2051 /* Clearing picture aspect ratio bits from out flags, 2052 * as the aspect-ratio information is not stored in 2053 * flags for kernel-mode, but in picture_aspect_ratio. 2054 */ 2055 out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 2056 2057 switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) { 2058 case DRM_MODE_FLAG_PIC_AR_4_3: 2059 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3; 2060 break; 2061 case DRM_MODE_FLAG_PIC_AR_16_9: 2062 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9; 2063 break; 2064 case DRM_MODE_FLAG_PIC_AR_64_27: 2065 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27; 2066 break; 2067 case DRM_MODE_FLAG_PIC_AR_256_135: 2068 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135; 2069 break; 2070 case DRM_MODE_FLAG_PIC_AR_NONE: 2071 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE; 2072 break; 2073 default: 2074 return -EINVAL; 2075 } 2076 2077 out->status = drm_mode_validate_driver(dev, out); 2078 if (out->status != MODE_OK) 2079 return -EINVAL; 2080 2081 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 2082 2083 return 0; 2084 } 2085 2086 /** 2087 * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420 2088 * output format 2089 * 2090 * @display: display under action 2091 * @mode: video mode to be tested. 2092 * 2093 * Returns: 2094 * true if the mode can be supported in YCBCR420 format 2095 * false if not. 2096 */ 2097 bool drm_mode_is_420_only(const struct drm_display_info *display, 2098 const struct drm_display_mode *mode) 2099 { 2100 u8 vic = drm_match_cea_mode(mode); 2101 2102 return test_bit(vic, display->hdmi.y420_vdb_modes); 2103 } 2104 EXPORT_SYMBOL(drm_mode_is_420_only); 2105 2106 /** 2107 * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420 2108 * output format also (along with RGB/YCBCR444/422) 2109 * 2110 * @display: display under action. 2111 * @mode: video mode to be tested. 2112 * 2113 * Returns: 2114 * true if the mode can be support YCBCR420 format 2115 * false if not. 2116 */ 2117 bool drm_mode_is_420_also(const struct drm_display_info *display, 2118 const struct drm_display_mode *mode) 2119 { 2120 u8 vic = drm_match_cea_mode(mode); 2121 2122 return test_bit(vic, display->hdmi.y420_cmdb_modes); 2123 } 2124 EXPORT_SYMBOL(drm_mode_is_420_also); 2125 /** 2126 * drm_mode_is_420 - if a given videomode can be supported in YCBCR420 2127 * output format 2128 * 2129 * @display: display under action. 2130 * @mode: video mode to be tested. 2131 * 2132 * Returns: 2133 * true if the mode can be supported in YCBCR420 format 2134 * false if not. 2135 */ 2136 bool drm_mode_is_420(const struct drm_display_info *display, 2137 const struct drm_display_mode *mode) 2138 { 2139 return drm_mode_is_420_only(display, mode) || 2140 drm_mode_is_420_also(display, mode); 2141 } 2142 EXPORT_SYMBOL(drm_mode_is_420); 2143