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/list.h> 34 #include <linux/list_sort.h> 35 #include <linux/export.h> 36 #include <drm/drmP.h> 37 #include <drm/drm_crtc.h> 38 #include <video/of_videomode.h> 39 #include <video/videomode.h> 40 #include <drm/drm_modes.h> 41 42 #include "drm_crtc_internal.h" 43 44 /** 45 * drm_mode_debug_printmodeline - print a mode to dmesg 46 * @mode: mode to print 47 * 48 * Describe @mode using DRM_DEBUG. 49 */ 50 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) 51 { 52 DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 53 } 54 EXPORT_SYMBOL(drm_mode_debug_printmodeline); 55 56 /** 57 * drm_mode_create - create a new display mode 58 * @dev: DRM device 59 * 60 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it 61 * and return it. 62 * 63 * Returns: 64 * Pointer to new mode on success, NULL on error. 65 */ 66 struct drm_display_mode *drm_mode_create(struct drm_device *dev) 67 { 68 struct drm_display_mode *nmode; 69 70 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); 71 if (!nmode) 72 return NULL; 73 74 if (drm_mode_object_add(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) { 75 kfree(nmode); 76 return NULL; 77 } 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 drm_mode_object_unregister(dev, &mode->base); 96 97 kfree(mode); 98 } 99 EXPORT_SYMBOL(drm_mode_destroy); 100 101 /** 102 * drm_mode_probed_add - add a mode to a connector's probed_mode list 103 * @connector: connector the new mode 104 * @mode: mode data 105 * 106 * Add @mode to @connector's probed_mode list for later use. This list should 107 * then in a second step get filtered and all the modes actually supported by 108 * the hardware moved to the @connector's modes list. 109 */ 110 void drm_mode_probed_add(struct drm_connector *connector, 111 struct drm_display_mode *mode) 112 { 113 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 114 115 list_add_tail(&mode->head, &connector->probed_modes); 116 } 117 EXPORT_SYMBOL(drm_mode_probed_add); 118 119 /** 120 * drm_cvt_mode -create a modeline based on the CVT algorithm 121 * @dev: drm device 122 * @hdisplay: hdisplay size 123 * @vdisplay: vdisplay size 124 * @vrefresh: vrefresh rate 125 * @reduced: whether to use reduced blanking 126 * @interlaced: whether to compute an interlaced mode 127 * @margins: whether to add margins (borders) 128 * 129 * This function is called to generate the modeline based on CVT algorithm 130 * according to the hdisplay, vdisplay, vrefresh. 131 * It is based from the VESA(TM) Coordinated Video Timing Generator by 132 * Graham Loveridge April 9, 2003 available at 133 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 134 * 135 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 136 * What I have done is to translate it by using integer calculation. 137 * 138 * Returns: 139 * The modeline based on the CVT algorithm stored in a drm_display_mode object. 140 * The display mode object is allocated with drm_mode_create(). Returns NULL 141 * when no mode could be allocated. 142 */ 143 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 144 int vdisplay, int vrefresh, 145 bool reduced, bool interlaced, bool margins) 146 { 147 #define HV_FACTOR 1000 148 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 149 #define CVT_MARGIN_PERCENTAGE 18 150 /* 2) character cell horizontal granularity (pixels) - default 8 */ 151 #define CVT_H_GRANULARITY 8 152 /* 3) Minimum vertical porch (lines) - default 3 */ 153 #define CVT_MIN_V_PORCH 3 154 /* 4) Minimum number of vertical back porch lines - default 6 */ 155 #define CVT_MIN_V_BPORCH 6 156 /* Pixel Clock step (kHz) */ 157 #define CVT_CLOCK_STEP 250 158 struct drm_display_mode *drm_mode; 159 unsigned int vfieldrate, hperiod; 160 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 161 int interlace; 162 u64 tmp; 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, 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 } 342 EXPORT_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 */ 365 struct drm_display_mode * 366 drm_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, vback_porch; 390 unsigned int vtotal_lines, vfieldrate_est, hperiod; 391 unsigned int vfield_rate, vframe_rate; 392 int left_margin, right_margin; 393 unsigned int total_active_pixels, ideal_duty_cycle; 394 unsigned int hblank, total_pixels, pixel_freq; 395 int hsync, hfront_porch, vodd_front_porch_lines; 396 unsigned int tmp1, tmp2; 397 398 drm_mode = drm_mode_create(dev); 399 if (!drm_mode) 400 return NULL; 401 402 /* 1. In order to give correct results, the number of horizontal 403 * pixels requested is first processed to ensure that it is divisible 404 * by the character size, by rounding it to the nearest character 405 * cell boundary: 406 */ 407 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 408 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 409 410 /* 2. If interlace is requested, the number of vertical lines assumed 411 * by the calculation must be halved, as the computation calculates 412 * the number of vertical lines per field. 413 */ 414 if (interlaced) 415 vdisplay_rnd = vdisplay / 2; 416 else 417 vdisplay_rnd = vdisplay; 418 419 /* 3. Find the frame rate required: */ 420 if (interlaced) 421 vfieldrate_rqd = vrefresh * 2; 422 else 423 vfieldrate_rqd = vrefresh; 424 425 /* 4. Find number of lines in Top margin: */ 426 top_margin = 0; 427 if (margins) 428 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 429 1000; 430 /* 5. Find number of lines in bottom margin: */ 431 bottom_margin = top_margin; 432 433 /* 6. If interlace is required, then set variable interlace: */ 434 if (interlaced) 435 interlace = 1; 436 else 437 interlace = 0; 438 439 /* 7. Estimate the Horizontal frequency */ 440 { 441 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 442 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 443 2 + interlace; 444 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 445 } 446 447 /* 8. Find the number of lines in V sync + back porch */ 448 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 449 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 450 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 451 /* 9. Find the number of lines in V back porch alone: */ 452 vback_porch = vsync_plus_bp - V_SYNC_RQD; 453 /* 10. Find the total number of lines in Vertical field period: */ 454 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 455 vsync_plus_bp + GTF_MIN_V_PORCH; 456 /* 11. Estimate the Vertical field frequency: */ 457 vfieldrate_est = hfreq_est / vtotal_lines; 458 /* 12. Find the actual horizontal period: */ 459 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 460 461 /* 13. Find the actual Vertical field frequency: */ 462 vfield_rate = hfreq_est / vtotal_lines; 463 /* 14. Find the Vertical frame frequency: */ 464 if (interlaced) 465 vframe_rate = vfield_rate / 2; 466 else 467 vframe_rate = vfield_rate; 468 /* 15. Find number of pixels in left margin: */ 469 if (margins) 470 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 471 1000; 472 else 473 left_margin = 0; 474 475 /* 16.Find number of pixels in right margin: */ 476 right_margin = left_margin; 477 /* 17.Find total number of active pixels in image and left and right */ 478 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 479 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 480 ideal_duty_cycle = GTF_C_PRIME * 1000 - 481 (GTF_M_PRIME * 1000000 / hfreq_est); 482 /* 19.Find the number of pixels in the blanking time to the nearest 483 * double character cell: */ 484 hblank = total_active_pixels * ideal_duty_cycle / 485 (100000 - ideal_duty_cycle); 486 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 487 hblank = hblank * 2 * GTF_CELL_GRAN; 488 /* 20.Find total number of pixels: */ 489 total_pixels = total_active_pixels + hblank; 490 /* 21.Find pixel clock frequency: */ 491 pixel_freq = total_pixels * hfreq_est / 1000; 492 /* Stage 1 computations are now complete; I should really pass 493 * the results to another function and do the Stage 2 computations, 494 * but I only need a few more values so I'll just append the 495 * computations here for now */ 496 /* 17. Find the number of pixels in the horizontal sync period: */ 497 hsync = H_SYNC_PERCENT * total_pixels / 100; 498 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 499 hsync = hsync * GTF_CELL_GRAN; 500 /* 18. Find the number of pixels in horizontal front porch period */ 501 hfront_porch = hblank / 2 - hsync; 502 /* 36. Find the number of lines in the odd front porch period: */ 503 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 504 505 /* finally, pack the results in the mode struct */ 506 drm_mode->hdisplay = hdisplay_rnd; 507 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 508 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 509 drm_mode->htotal = total_pixels; 510 drm_mode->vdisplay = vdisplay_rnd; 511 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 512 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 513 drm_mode->vtotal = vtotal_lines; 514 515 drm_mode->clock = pixel_freq; 516 517 if (interlaced) { 518 drm_mode->vtotal *= 2; 519 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 520 } 521 522 drm_mode_set_name(drm_mode); 523 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 524 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 525 else 526 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 527 528 return drm_mode; 529 } 530 EXPORT_SYMBOL(drm_gtf_mode_complex); 531 532 /** 533 * drm_gtf_mode - create the modeline based on the GTF algorithm 534 * @dev: drm device 535 * @hdisplay: hdisplay size 536 * @vdisplay: vdisplay size 537 * @vrefresh: vrefresh rate. 538 * @interlaced: whether to compute an interlaced mode 539 * @margins: desired margin (borders) size 540 * 541 * return the modeline based on GTF algorithm 542 * 543 * This function is to create the modeline based on the GTF algorithm. 544 * Generalized Timing Formula is derived from: 545 * 546 * GTF Spreadsheet by Andy Morrish (1/5/97) 547 * available at http://www.vesa.org 548 * 549 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 550 * What I have done is to translate it by using integer calculation. 551 * I also refer to the function of fb_get_mode in the file of 552 * drivers/video/fbmon.c 553 * 554 * Standard GTF parameters:: 555 * 556 * M = 600 557 * C = 40 558 * K = 128 559 * J = 20 560 * 561 * Returns: 562 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 563 * The display mode object is allocated with drm_mode_create(). Returns NULL 564 * when no mode could be allocated. 565 */ 566 struct drm_display_mode * 567 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 568 bool interlaced, int margins) 569 { 570 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 571 interlaced, margins, 572 600, 40 * 2, 128, 20 * 2); 573 } 574 EXPORT_SYMBOL(drm_gtf_mode); 575 576 #ifdef CONFIG_VIDEOMODE_HELPERS 577 /** 578 * drm_display_mode_from_videomode - fill in @dmode using @vm, 579 * @vm: videomode structure to use as source 580 * @dmode: drm_display_mode structure to use as destination 581 * 582 * Fills out @dmode using the display mode specified in @vm. 583 */ 584 void drm_display_mode_from_videomode(const struct videomode *vm, 585 struct drm_display_mode *dmode) 586 { 587 dmode->hdisplay = vm->hactive; 588 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 589 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 590 dmode->htotal = dmode->hsync_end + vm->hback_porch; 591 592 dmode->vdisplay = vm->vactive; 593 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 594 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 595 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 596 597 dmode->clock = vm->pixelclock / 1000; 598 599 dmode->flags = 0; 600 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 601 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 602 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 603 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 604 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 605 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 606 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 607 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 608 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 609 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 610 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 611 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 612 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 613 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 614 drm_mode_set_name(dmode); 615 } 616 617 /** 618 * drm_display_mode_to_videomode - fill in @vm using @dmode, 619 * @dmode: drm_display_mode structure to use as source 620 * @vm: videomode structure to use as destination 621 * 622 * Fills out @vm using the display mode specified in @dmode. 623 */ 624 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 625 struct videomode *vm) 626 { 627 vm->hactive = dmode->hdisplay; 628 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 629 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 630 vm->hback_porch = dmode->htotal - dmode->hsync_end; 631 632 vm->vactive = dmode->vdisplay; 633 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 634 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 635 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 636 637 vm->pixelclock = dmode->clock * 1000; 638 639 vm->flags = 0; 640 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 641 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 642 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 643 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 644 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 645 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 646 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 647 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 648 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 649 vm->flags |= DISPLAY_FLAGS_INTERLACED; 650 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 651 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 652 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 653 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 654 } 655 656 /** 657 * drm_bus_flags_from_videomode - extract information about pixelclk and 658 * DE polarity from videomode and store it in a separate variable 659 * @vm: videomode structure to use 660 * @bus_flags: information about pixelclk and DE polarity will be stored here 661 * 662 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH) and DRM_BUS_FLAG_PIXDATA_(POS|NEG)EDGE 663 * in @bus_flags according to DISPLAY_FLAGS found in @vm 664 */ 665 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) 666 { 667 *bus_flags = 0; 668 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) 669 *bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE; 670 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 671 *bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE; 672 673 if (vm->flags & DISPLAY_FLAGS_DE_LOW) 674 *bus_flags |= DRM_BUS_FLAG_DE_LOW; 675 if (vm->flags & DISPLAY_FLAGS_DE_HIGH) 676 *bus_flags |= DRM_BUS_FLAG_DE_HIGH; 677 } 678 EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); 679 680 #ifdef CONFIG_OF 681 /** 682 * of_get_drm_display_mode - get a drm_display_mode from devicetree 683 * @np: device_node with the timing specification 684 * @dmode: will be set to the return value 685 * @bus_flags: information about pixelclk and DE polarity 686 * @index: index into the list of display timings in devicetree 687 * 688 * This function is expensive and should only be used, if only one mode is to be 689 * read from DT. To get multiple modes start with of_get_display_timings and 690 * work with that instead. 691 * 692 * Returns: 693 * 0 on success, a negative errno code when no of videomode node was found. 694 */ 695 int of_get_drm_display_mode(struct device_node *np, 696 struct drm_display_mode *dmode, u32 *bus_flags, 697 int index) 698 { 699 struct videomode vm; 700 int ret; 701 702 ret = of_get_videomode(np, &vm, index); 703 if (ret) 704 return ret; 705 706 drm_display_mode_from_videomode(&vm, dmode); 707 if (bus_flags) 708 drm_bus_flags_from_videomode(&vm, bus_flags); 709 710 pr_debug("%s: got %dx%d display mode from %s\n", 711 of_node_full_name(np), vm.hactive, vm.vactive, np->name); 712 drm_mode_debug_printmodeline(dmode); 713 714 return 0; 715 } 716 #endif /* CONFIG_OF */ 717 #endif /* CONFIG_VIDEOMODE_HELPERS */ 718 719 /** 720 * drm_mode_set_name - set the name on a mode 721 * @mode: name will be set in this mode 722 * 723 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 724 * with an optional 'i' suffix for interlaced modes. 725 */ 726 void drm_mode_set_name(struct drm_display_mode *mode) 727 { 728 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 729 730 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 731 mode->hdisplay, mode->vdisplay, 732 interlaced ? "i" : ""); 733 } 734 EXPORT_SYMBOL(drm_mode_set_name); 735 736 /** 737 * drm_mode_hsync - get the hsync of a mode 738 * @mode: mode 739 * 740 * Returns: 741 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the 742 * value first if it is not yet set. 743 */ 744 int drm_mode_hsync(const struct drm_display_mode *mode) 745 { 746 unsigned int calc_val; 747 748 if (mode->hsync) 749 return mode->hsync; 750 751 if (mode->htotal < 0) 752 return 0; 753 754 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ 755 calc_val += 500; /* round to 1000Hz */ 756 calc_val /= 1000; /* truncate to kHz */ 757 758 return calc_val; 759 } 760 EXPORT_SYMBOL(drm_mode_hsync); 761 762 /** 763 * drm_mode_vrefresh - get the vrefresh of a mode 764 * @mode: mode 765 * 766 * Returns: 767 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 768 * value first if it is not yet set. 769 */ 770 int drm_mode_vrefresh(const struct drm_display_mode *mode) 771 { 772 int refresh = 0; 773 unsigned int calc_val; 774 775 if (mode->vrefresh > 0) 776 refresh = mode->vrefresh; 777 else if (mode->htotal > 0 && mode->vtotal > 0) { 778 int vtotal; 779 vtotal = mode->vtotal; 780 /* work out vrefresh the value will be x1000 */ 781 calc_val = (mode->clock * 1000); 782 calc_val /= mode->htotal; 783 refresh = (calc_val + vtotal / 2) / vtotal; 784 785 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 786 refresh *= 2; 787 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 788 refresh /= 2; 789 if (mode->vscan > 1) 790 refresh /= mode->vscan; 791 } 792 return refresh; 793 } 794 EXPORT_SYMBOL(drm_mode_vrefresh); 795 796 /** 797 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode 798 * @mode: mode to query 799 * @hdisplay: hdisplay value to fill in 800 * @vdisplay: vdisplay value to fill in 801 * 802 * The vdisplay value will be doubled if the specified mode is a stereo mode of 803 * the appropriate layout. 804 */ 805 void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 806 int *hdisplay, int *vdisplay) 807 { 808 struct drm_display_mode adjusted = *mode; 809 810 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 811 *hdisplay = adjusted.crtc_hdisplay; 812 *vdisplay = adjusted.crtc_vdisplay; 813 } 814 EXPORT_SYMBOL(drm_mode_get_hv_timing); 815 816 /** 817 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 818 * @p: mode 819 * @adjust_flags: a combination of adjustment flags 820 * 821 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 822 * 823 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 824 * interlaced modes. 825 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 826 * buffers containing two eyes (only adjust the timings when needed, eg. for 827 * "frame packing" or "side by side full"). 828 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 829 * be performed for doublescan and vscan > 1 modes respectively. 830 */ 831 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 832 { 833 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) 834 return; 835 836 p->crtc_clock = p->clock; 837 p->crtc_hdisplay = p->hdisplay; 838 p->crtc_hsync_start = p->hsync_start; 839 p->crtc_hsync_end = p->hsync_end; 840 p->crtc_htotal = p->htotal; 841 p->crtc_hskew = p->hskew; 842 p->crtc_vdisplay = p->vdisplay; 843 p->crtc_vsync_start = p->vsync_start; 844 p->crtc_vsync_end = p->vsync_end; 845 p->crtc_vtotal = p->vtotal; 846 847 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 848 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 849 p->crtc_vdisplay /= 2; 850 p->crtc_vsync_start /= 2; 851 p->crtc_vsync_end /= 2; 852 p->crtc_vtotal /= 2; 853 } 854 } 855 856 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 857 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 858 p->crtc_vdisplay *= 2; 859 p->crtc_vsync_start *= 2; 860 p->crtc_vsync_end *= 2; 861 p->crtc_vtotal *= 2; 862 } 863 } 864 865 if (!(adjust_flags & CRTC_NO_VSCAN)) { 866 if (p->vscan > 1) { 867 p->crtc_vdisplay *= p->vscan; 868 p->crtc_vsync_start *= p->vscan; 869 p->crtc_vsync_end *= p->vscan; 870 p->crtc_vtotal *= p->vscan; 871 } 872 } 873 874 if (adjust_flags & CRTC_STEREO_DOUBLE) { 875 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 876 877 switch (layout) { 878 case DRM_MODE_FLAG_3D_FRAME_PACKING: 879 p->crtc_clock *= 2; 880 p->crtc_vdisplay += p->crtc_vtotal; 881 p->crtc_vsync_start += p->crtc_vtotal; 882 p->crtc_vsync_end += p->crtc_vtotal; 883 p->crtc_vtotal += p->crtc_vtotal; 884 break; 885 } 886 } 887 888 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 889 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 890 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 891 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 892 } 893 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 894 895 /** 896 * drm_mode_copy - copy the mode 897 * @dst: mode to overwrite 898 * @src: mode to copy 899 * 900 * Copy an existing mode into another mode, preserving the object id and 901 * list head of the destination mode. 902 */ 903 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 904 { 905 int id = dst->base.id; 906 struct list_head head = dst->head; 907 908 *dst = *src; 909 dst->base.id = id; 910 dst->head = head; 911 } 912 EXPORT_SYMBOL(drm_mode_copy); 913 914 /** 915 * drm_mode_duplicate - allocate and duplicate an existing mode 916 * @dev: drm_device to allocate the duplicated mode for 917 * @mode: mode to duplicate 918 * 919 * Just allocate a new mode, copy the existing mode into it, and return 920 * a pointer to it. Used to create new instances of established modes. 921 * 922 * Returns: 923 * Pointer to duplicated mode on success, NULL on error. 924 */ 925 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 926 const struct drm_display_mode *mode) 927 { 928 struct drm_display_mode *nmode; 929 930 nmode = drm_mode_create(dev); 931 if (!nmode) 932 return NULL; 933 934 drm_mode_copy(nmode, mode); 935 936 return nmode; 937 } 938 EXPORT_SYMBOL(drm_mode_duplicate); 939 940 /** 941 * drm_mode_equal - test modes for equality 942 * @mode1: first mode 943 * @mode2: second mode 944 * 945 * Check to see if @mode1 and @mode2 are equivalent. 946 * 947 * Returns: 948 * True if the modes are equal, false otherwise. 949 */ 950 bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 951 { 952 if (!mode1 && !mode2) 953 return true; 954 955 if (!mode1 || !mode2) 956 return false; 957 958 /* do clock check convert to PICOS so fb modes get matched 959 * the same */ 960 if (mode1->clock && mode2->clock) { 961 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) 962 return false; 963 } else if (mode1->clock != mode2->clock) 964 return false; 965 966 return drm_mode_equal_no_clocks(mode1, mode2); 967 } 968 EXPORT_SYMBOL(drm_mode_equal); 969 970 /** 971 * drm_mode_equal_no_clocks - test modes for equality 972 * @mode1: first mode 973 * @mode2: second mode 974 * 975 * Check to see if @mode1 and @mode2 are equivalent, but 976 * don't check the pixel clocks. 977 * 978 * Returns: 979 * True if the modes are equal, false otherwise. 980 */ 981 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 982 { 983 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) != 984 (mode2->flags & DRM_MODE_FLAG_3D_MASK)) 985 return false; 986 987 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2); 988 } 989 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 990 991 /** 992 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 993 * @mode1: first mode 994 * @mode2: second mode 995 * 996 * Check to see if @mode1 and @mode2 are equivalent, but 997 * don't check the pixel clocks nor the stereo layout. 998 * 999 * Returns: 1000 * True if the modes are equal, false otherwise. 1001 */ 1002 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 1003 const struct drm_display_mode *mode2) 1004 { 1005 if (mode1->hdisplay == mode2->hdisplay && 1006 mode1->hsync_start == mode2->hsync_start && 1007 mode1->hsync_end == mode2->hsync_end && 1008 mode1->htotal == mode2->htotal && 1009 mode1->hskew == mode2->hskew && 1010 mode1->vdisplay == mode2->vdisplay && 1011 mode1->vsync_start == mode2->vsync_start && 1012 mode1->vsync_end == mode2->vsync_end && 1013 mode1->vtotal == mode2->vtotal && 1014 mode1->vscan == mode2->vscan && 1015 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 1016 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK)) 1017 return true; 1018 1019 return false; 1020 } 1021 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1022 1023 /** 1024 * drm_mode_validate_basic - make sure the mode is somewhat sane 1025 * @mode: mode to check 1026 * 1027 * Check that the mode timings are at least somewhat reasonable. 1028 * Any hardware specific limits are left up for each driver to check. 1029 * 1030 * Returns: 1031 * The mode status 1032 */ 1033 enum drm_mode_status 1034 drm_mode_validate_basic(const struct drm_display_mode *mode) 1035 { 1036 if (mode->clock == 0) 1037 return MODE_CLOCK_LOW; 1038 1039 if (mode->hdisplay == 0 || 1040 mode->hsync_start < mode->hdisplay || 1041 mode->hsync_end < mode->hsync_start || 1042 mode->htotal < mode->hsync_end) 1043 return MODE_H_ILLEGAL; 1044 1045 if (mode->vdisplay == 0 || 1046 mode->vsync_start < mode->vdisplay || 1047 mode->vsync_end < mode->vsync_start || 1048 mode->vtotal < mode->vsync_end) 1049 return MODE_V_ILLEGAL; 1050 1051 return MODE_OK; 1052 } 1053 EXPORT_SYMBOL(drm_mode_validate_basic); 1054 1055 /** 1056 * drm_mode_validate_size - make sure modes adhere to size constraints 1057 * @mode: mode to check 1058 * @maxX: maximum width 1059 * @maxY: maximum height 1060 * 1061 * This function is a helper which can be used to validate modes against size 1062 * limitations of the DRM device/connector. If a mode is too big its status 1063 * member is updated with the appropriate validation failure code. The list 1064 * itself is not changed. 1065 * 1066 * Returns: 1067 * The mode status 1068 */ 1069 enum drm_mode_status 1070 drm_mode_validate_size(const struct drm_display_mode *mode, 1071 int maxX, int maxY) 1072 { 1073 if (maxX > 0 && mode->hdisplay > maxX) 1074 return MODE_VIRTUAL_X; 1075 1076 if (maxY > 0 && mode->vdisplay > maxY) 1077 return MODE_VIRTUAL_Y; 1078 1079 return MODE_OK; 1080 } 1081 EXPORT_SYMBOL(drm_mode_validate_size); 1082 1083 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1084 1085 static const char * const drm_mode_status_names[] = { 1086 MODE_STATUS(OK), 1087 MODE_STATUS(HSYNC), 1088 MODE_STATUS(VSYNC), 1089 MODE_STATUS(H_ILLEGAL), 1090 MODE_STATUS(V_ILLEGAL), 1091 MODE_STATUS(BAD_WIDTH), 1092 MODE_STATUS(NOMODE), 1093 MODE_STATUS(NO_INTERLACE), 1094 MODE_STATUS(NO_DBLESCAN), 1095 MODE_STATUS(NO_VSCAN), 1096 MODE_STATUS(MEM), 1097 MODE_STATUS(VIRTUAL_X), 1098 MODE_STATUS(VIRTUAL_Y), 1099 MODE_STATUS(MEM_VIRT), 1100 MODE_STATUS(NOCLOCK), 1101 MODE_STATUS(CLOCK_HIGH), 1102 MODE_STATUS(CLOCK_LOW), 1103 MODE_STATUS(CLOCK_RANGE), 1104 MODE_STATUS(BAD_HVALUE), 1105 MODE_STATUS(BAD_VVALUE), 1106 MODE_STATUS(BAD_VSCAN), 1107 MODE_STATUS(HSYNC_NARROW), 1108 MODE_STATUS(HSYNC_WIDE), 1109 MODE_STATUS(HBLANK_NARROW), 1110 MODE_STATUS(HBLANK_WIDE), 1111 MODE_STATUS(VSYNC_NARROW), 1112 MODE_STATUS(VSYNC_WIDE), 1113 MODE_STATUS(VBLANK_NARROW), 1114 MODE_STATUS(VBLANK_WIDE), 1115 MODE_STATUS(PANEL), 1116 MODE_STATUS(INTERLACE_WIDTH), 1117 MODE_STATUS(ONE_WIDTH), 1118 MODE_STATUS(ONE_HEIGHT), 1119 MODE_STATUS(ONE_SIZE), 1120 MODE_STATUS(NO_REDUCED), 1121 MODE_STATUS(NO_STEREO), 1122 MODE_STATUS(STALE), 1123 MODE_STATUS(BAD), 1124 MODE_STATUS(ERROR), 1125 }; 1126 1127 #undef MODE_STATUS 1128 1129 static const char *drm_get_mode_status_name(enum drm_mode_status status) 1130 { 1131 int index = status + 3; 1132 1133 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1134 return ""; 1135 1136 return drm_mode_status_names[index]; 1137 } 1138 1139 /** 1140 * drm_mode_prune_invalid - remove invalid modes from mode list 1141 * @dev: DRM device 1142 * @mode_list: list of modes to check 1143 * @verbose: be verbose about it 1144 * 1145 * This helper function can be used to prune a display mode list after 1146 * validation has been completed. All modes who's status is not MODE_OK will be 1147 * removed from the list, and if @verbose the status code and mode name is also 1148 * printed to dmesg. 1149 */ 1150 void drm_mode_prune_invalid(struct drm_device *dev, 1151 struct list_head *mode_list, bool verbose) 1152 { 1153 struct drm_display_mode *mode, *t; 1154 1155 list_for_each_entry_safe(mode, t, mode_list, head) { 1156 if (mode->status != MODE_OK) { 1157 list_del(&mode->head); 1158 if (verbose) { 1159 drm_mode_debug_printmodeline(mode); 1160 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1161 mode->name, 1162 drm_get_mode_status_name(mode->status)); 1163 } 1164 drm_mode_destroy(dev, mode); 1165 } 1166 } 1167 } 1168 EXPORT_SYMBOL(drm_mode_prune_invalid); 1169 1170 /** 1171 * drm_mode_compare - compare modes for favorability 1172 * @priv: unused 1173 * @lh_a: list_head for first mode 1174 * @lh_b: list_head for second mode 1175 * 1176 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1177 * which is better. 1178 * 1179 * Returns: 1180 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1181 * positive if @lh_b is better than @lh_a. 1182 */ 1183 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) 1184 { 1185 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1186 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1187 int diff; 1188 1189 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1190 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1191 if (diff) 1192 return diff; 1193 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1194 if (diff) 1195 return diff; 1196 1197 diff = b->vrefresh - a->vrefresh; 1198 if (diff) 1199 return diff; 1200 1201 diff = b->clock - a->clock; 1202 return diff; 1203 } 1204 1205 /** 1206 * drm_mode_sort - sort mode list 1207 * @mode_list: list of drm_display_mode structures to sort 1208 * 1209 * Sort @mode_list by favorability, moving good modes to the head of the list. 1210 */ 1211 void drm_mode_sort(struct list_head *mode_list) 1212 { 1213 list_sort(NULL, mode_list, drm_mode_compare); 1214 } 1215 EXPORT_SYMBOL(drm_mode_sort); 1216 1217 /** 1218 * drm_mode_connector_list_update - update the mode list for the connector 1219 * @connector: the connector to update 1220 * 1221 * This moves the modes from the @connector probed_modes list 1222 * to the actual mode list. It compares the probed mode against the current 1223 * list and only adds different/new modes. 1224 * 1225 * This is just a helper functions doesn't validate any modes itself and also 1226 * doesn't prune any invalid modes. Callers need to do that themselves. 1227 */ 1228 void drm_mode_connector_list_update(struct drm_connector *connector) 1229 { 1230 struct drm_display_mode *pmode, *pt; 1231 1232 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1233 1234 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1235 struct drm_display_mode *mode; 1236 bool found_it = false; 1237 1238 /* go through current modes checking for the new probed mode */ 1239 list_for_each_entry(mode, &connector->modes, head) { 1240 if (!drm_mode_equal(pmode, mode)) 1241 continue; 1242 1243 found_it = true; 1244 1245 /* 1246 * If the old matching mode is stale (ie. left over 1247 * from a previous probe) just replace it outright. 1248 * Otherwise just merge the type bits between all 1249 * equal probed modes. 1250 * 1251 * If two probed modes are considered equal, pick the 1252 * actual timings from the one that's marked as 1253 * preferred (in case the match isn't 100%). If 1254 * multiple or zero preferred modes are present, favor 1255 * the mode added to the probed_modes list first. 1256 */ 1257 if (mode->status == MODE_STALE) { 1258 drm_mode_copy(mode, pmode); 1259 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1260 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1261 pmode->type |= mode->type; 1262 drm_mode_copy(mode, pmode); 1263 } else { 1264 mode->type |= pmode->type; 1265 } 1266 1267 list_del(&pmode->head); 1268 drm_mode_destroy(connector->dev, pmode); 1269 break; 1270 } 1271 1272 if (!found_it) { 1273 list_move_tail(&pmode->head, &connector->modes); 1274 } 1275 } 1276 } 1277 EXPORT_SYMBOL(drm_mode_connector_list_update); 1278 1279 /** 1280 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1281 * @mode_option: optional per connector mode option 1282 * @connector: connector to parse modeline for 1283 * @mode: preallocated drm_cmdline_mode structure to fill out 1284 * 1285 * This parses @mode_option command line modeline for modes and options to 1286 * configure the connector. If @mode_option is NULL the default command line 1287 * modeline in fb_mode_option will be parsed instead. 1288 * 1289 * This uses the same parameters as the fb modedb.c, except for an extra 1290 * force-enable, force-enable-digital and force-disable bit at the end: 1291 * 1292 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1293 * 1294 * The intermediate drm_cmdline_mode structure is required to store additional 1295 * options from the command line modline like the force-enable/disable flag. 1296 * 1297 * Returns: 1298 * True if a valid modeline has been parsed, false otherwise. 1299 */ 1300 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1301 struct drm_connector *connector, 1302 struct drm_cmdline_mode *mode) 1303 { 1304 const char *name; 1305 unsigned int namelen; 1306 bool res_specified = false, bpp_specified = false, refresh_specified = false; 1307 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; 1308 bool yres_specified = false, cvt = false, rb = false; 1309 bool interlace = false, margins = false, was_digit = false; 1310 int i; 1311 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; 1312 1313 #ifdef CONFIG_FB 1314 if (!mode_option) 1315 mode_option = fb_mode_option; 1316 #endif 1317 1318 if (!mode_option) { 1319 mode->specified = false; 1320 return false; 1321 } 1322 1323 name = mode_option; 1324 namelen = strlen(name); 1325 for (i = namelen-1; i >= 0; i--) { 1326 switch (name[i]) { 1327 case '@': 1328 if (!refresh_specified && !bpp_specified && 1329 !yres_specified && !cvt && !rb && was_digit) { 1330 refresh = simple_strtol(&name[i+1], NULL, 10); 1331 refresh_specified = true; 1332 was_digit = false; 1333 } else 1334 goto done; 1335 break; 1336 case '-': 1337 if (!bpp_specified && !yres_specified && !cvt && 1338 !rb && was_digit) { 1339 bpp = simple_strtol(&name[i+1], NULL, 10); 1340 bpp_specified = true; 1341 was_digit = false; 1342 } else 1343 goto done; 1344 break; 1345 case 'x': 1346 if (!yres_specified && was_digit) { 1347 yres = simple_strtol(&name[i+1], NULL, 10); 1348 yres_specified = true; 1349 was_digit = false; 1350 } else 1351 goto done; 1352 break; 1353 case '0' ... '9': 1354 was_digit = true; 1355 break; 1356 case 'M': 1357 if (yres_specified || cvt || was_digit) 1358 goto done; 1359 cvt = true; 1360 break; 1361 case 'R': 1362 if (yres_specified || cvt || rb || was_digit) 1363 goto done; 1364 rb = true; 1365 break; 1366 case 'm': 1367 if (cvt || yres_specified || was_digit) 1368 goto done; 1369 margins = true; 1370 break; 1371 case 'i': 1372 if (cvt || yres_specified || was_digit) 1373 goto done; 1374 interlace = true; 1375 break; 1376 case 'e': 1377 if (yres_specified || bpp_specified || refresh_specified || 1378 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1379 goto done; 1380 1381 force = DRM_FORCE_ON; 1382 break; 1383 case 'D': 1384 if (yres_specified || bpp_specified || refresh_specified || 1385 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1386 goto done; 1387 1388 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1389 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1390 force = DRM_FORCE_ON; 1391 else 1392 force = DRM_FORCE_ON_DIGITAL; 1393 break; 1394 case 'd': 1395 if (yres_specified || bpp_specified || refresh_specified || 1396 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1397 goto done; 1398 1399 force = DRM_FORCE_OFF; 1400 break; 1401 default: 1402 goto done; 1403 } 1404 } 1405 1406 if (i < 0 && yres_specified) { 1407 char *ch; 1408 xres = simple_strtol(name, &ch, 10); 1409 if ((ch != NULL) && (*ch == 'x')) 1410 res_specified = true; 1411 else 1412 i = ch - name; 1413 } else if (!yres_specified && was_digit) { 1414 /* catch mode that begins with digits but has no 'x' */ 1415 i = 0; 1416 } 1417 done: 1418 if (i >= 0) { 1419 pr_warn("[drm] parse error at position %i in video mode '%s'\n", 1420 i, name); 1421 mode->specified = false; 1422 return false; 1423 } 1424 1425 if (res_specified) { 1426 mode->specified = true; 1427 mode->xres = xres; 1428 mode->yres = yres; 1429 } 1430 1431 if (refresh_specified) { 1432 mode->refresh_specified = true; 1433 mode->refresh = refresh; 1434 } 1435 1436 if (bpp_specified) { 1437 mode->bpp_specified = true; 1438 mode->bpp = bpp; 1439 } 1440 mode->rb = rb; 1441 mode->cvt = cvt; 1442 mode->interlace = interlace; 1443 mode->margins = margins; 1444 mode->force = force; 1445 1446 return true; 1447 } 1448 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1449 1450 /** 1451 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1452 * @dev: DRM device to create the new mode for 1453 * @cmd: input command line modeline 1454 * 1455 * Returns: 1456 * Pointer to converted mode on success, NULL on error. 1457 */ 1458 struct drm_display_mode * 1459 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1460 struct drm_cmdline_mode *cmd) 1461 { 1462 struct drm_display_mode *mode; 1463 1464 if (cmd->cvt) 1465 mode = drm_cvt_mode(dev, 1466 cmd->xres, cmd->yres, 1467 cmd->refresh_specified ? cmd->refresh : 60, 1468 cmd->rb, cmd->interlace, 1469 cmd->margins); 1470 else 1471 mode = drm_gtf_mode(dev, 1472 cmd->xres, cmd->yres, 1473 cmd->refresh_specified ? cmd->refresh : 60, 1474 cmd->interlace, 1475 cmd->margins); 1476 if (!mode) 1477 return NULL; 1478 1479 mode->type |= DRM_MODE_TYPE_USERDEF; 1480 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ 1481 if (cmd->xres == 1366) 1482 drm_mode_fixup_1366x768(mode); 1483 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1484 return mode; 1485 } 1486 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1487 1488 /** 1489 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1490 * @out: drm_mode_modeinfo struct to return to the user 1491 * @in: drm_display_mode to use 1492 * 1493 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1494 * the user. 1495 */ 1496 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1497 const struct drm_display_mode *in) 1498 { 1499 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1500 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1501 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1502 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1503 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1504 "timing values too large for mode info\n"); 1505 1506 out->clock = in->clock; 1507 out->hdisplay = in->hdisplay; 1508 out->hsync_start = in->hsync_start; 1509 out->hsync_end = in->hsync_end; 1510 out->htotal = in->htotal; 1511 out->hskew = in->hskew; 1512 out->vdisplay = in->vdisplay; 1513 out->vsync_start = in->vsync_start; 1514 out->vsync_end = in->vsync_end; 1515 out->vtotal = in->vtotal; 1516 out->vscan = in->vscan; 1517 out->vrefresh = in->vrefresh; 1518 out->flags = in->flags; 1519 out->type = in->type; 1520 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1521 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1522 } 1523 1524 /** 1525 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1526 * @out: drm_display_mode to return to the user 1527 * @in: drm_mode_modeinfo to use 1528 * 1529 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1530 * the caller. 1531 * 1532 * Returns: 1533 * Zero on success, negative errno on failure. 1534 */ 1535 int drm_mode_convert_umode(struct drm_display_mode *out, 1536 const struct drm_mode_modeinfo *in) 1537 { 1538 int ret = -EINVAL; 1539 1540 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) { 1541 ret = -ERANGE; 1542 goto out; 1543 } 1544 1545 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1546 goto out; 1547 1548 out->clock = in->clock; 1549 out->hdisplay = in->hdisplay; 1550 out->hsync_start = in->hsync_start; 1551 out->hsync_end = in->hsync_end; 1552 out->htotal = in->htotal; 1553 out->hskew = in->hskew; 1554 out->vdisplay = in->vdisplay; 1555 out->vsync_start = in->vsync_start; 1556 out->vsync_end = in->vsync_end; 1557 out->vtotal = in->vtotal; 1558 out->vscan = in->vscan; 1559 out->vrefresh = in->vrefresh; 1560 out->flags = in->flags; 1561 out->type = in->type; 1562 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1563 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1564 1565 out->status = drm_mode_validate_basic(out); 1566 if (out->status != MODE_OK) 1567 goto out; 1568 1569 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 1570 1571 ret = 0; 1572 1573 out: 1574 return ret; 1575 } 1576