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 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 617 618 /** 619 * drm_display_mode_to_videomode - fill in @vm using @dmode, 620 * @dmode: drm_display_mode structure to use as source 621 * @vm: videomode structure to use as destination 622 * 623 * Fills out @vm using the display mode specified in @dmode. 624 */ 625 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 626 struct videomode *vm) 627 { 628 vm->hactive = dmode->hdisplay; 629 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 630 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 631 vm->hback_porch = dmode->htotal - dmode->hsync_end; 632 633 vm->vactive = dmode->vdisplay; 634 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 635 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 636 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 637 638 vm->pixelclock = dmode->clock * 1000; 639 640 vm->flags = 0; 641 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 642 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 643 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 644 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 645 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 646 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 647 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 648 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 649 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 650 vm->flags |= DISPLAY_FLAGS_INTERLACED; 651 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 652 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 653 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 654 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 655 } 656 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 657 658 /** 659 * drm_bus_flags_from_videomode - extract information about pixelclk and 660 * DE polarity from videomode and store it in a separate variable 661 * @vm: videomode structure to use 662 * @bus_flags: information about pixelclk and DE polarity will be stored here 663 * 664 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH) and DRM_BUS_FLAG_PIXDATA_(POS|NEG)EDGE 665 * in @bus_flags according to DISPLAY_FLAGS found in @vm 666 */ 667 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) 668 { 669 *bus_flags = 0; 670 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) 671 *bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE; 672 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 673 *bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE; 674 675 if (vm->flags & DISPLAY_FLAGS_DE_LOW) 676 *bus_flags |= DRM_BUS_FLAG_DE_LOW; 677 if (vm->flags & DISPLAY_FLAGS_DE_HIGH) 678 *bus_flags |= DRM_BUS_FLAG_DE_HIGH; 679 } 680 EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); 681 682 #ifdef CONFIG_OF 683 /** 684 * of_get_drm_display_mode - get a drm_display_mode from devicetree 685 * @np: device_node with the timing specification 686 * @dmode: will be set to the return value 687 * @bus_flags: information about pixelclk and DE polarity 688 * @index: index into the list of display timings in devicetree 689 * 690 * This function is expensive and should only be used, if only one mode is to be 691 * read from DT. To get multiple modes start with of_get_display_timings and 692 * work with that instead. 693 * 694 * Returns: 695 * 0 on success, a negative errno code when no of videomode node was found. 696 */ 697 int of_get_drm_display_mode(struct device_node *np, 698 struct drm_display_mode *dmode, u32 *bus_flags, 699 int index) 700 { 701 struct videomode vm; 702 int ret; 703 704 ret = of_get_videomode(np, &vm, index); 705 if (ret) 706 return ret; 707 708 drm_display_mode_from_videomode(&vm, dmode); 709 if (bus_flags) 710 drm_bus_flags_from_videomode(&vm, bus_flags); 711 712 pr_debug("%pOF: got %dx%d display mode from %s\n", 713 np, vm.hactive, vm.vactive, np->name); 714 drm_mode_debug_printmodeline(dmode); 715 716 return 0; 717 } 718 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 719 #endif /* CONFIG_OF */ 720 #endif /* CONFIG_VIDEOMODE_HELPERS */ 721 722 /** 723 * drm_mode_set_name - set the name on a mode 724 * @mode: name will be set in this mode 725 * 726 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 727 * with an optional 'i' suffix for interlaced modes. 728 */ 729 void drm_mode_set_name(struct drm_display_mode *mode) 730 { 731 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 732 733 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 734 mode->hdisplay, mode->vdisplay, 735 interlaced ? "i" : ""); 736 } 737 EXPORT_SYMBOL(drm_mode_set_name); 738 739 /** 740 * drm_mode_hsync - get the hsync of a mode 741 * @mode: mode 742 * 743 * Returns: 744 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the 745 * value first if it is not yet set. 746 */ 747 int drm_mode_hsync(const struct drm_display_mode *mode) 748 { 749 unsigned int calc_val; 750 751 if (mode->hsync) 752 return mode->hsync; 753 754 if (mode->htotal < 0) 755 return 0; 756 757 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ 758 calc_val += 500; /* round to 1000Hz */ 759 calc_val /= 1000; /* truncate to kHz */ 760 761 return calc_val; 762 } 763 EXPORT_SYMBOL(drm_mode_hsync); 764 765 /** 766 * drm_mode_vrefresh - get the vrefresh of a mode 767 * @mode: mode 768 * 769 * Returns: 770 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 771 * value first if it is not yet set. 772 */ 773 int drm_mode_vrefresh(const struct drm_display_mode *mode) 774 { 775 int refresh = 0; 776 unsigned int calc_val; 777 778 if (mode->vrefresh > 0) 779 refresh = mode->vrefresh; 780 else if (mode->htotal > 0 && mode->vtotal > 0) { 781 int vtotal; 782 vtotal = mode->vtotal; 783 /* work out vrefresh the value will be x1000 */ 784 calc_val = (mode->clock * 1000); 785 calc_val /= mode->htotal; 786 refresh = (calc_val + vtotal / 2) / vtotal; 787 788 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 789 refresh *= 2; 790 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 791 refresh /= 2; 792 if (mode->vscan > 1) 793 refresh /= mode->vscan; 794 } 795 return refresh; 796 } 797 EXPORT_SYMBOL(drm_mode_vrefresh); 798 799 /** 800 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode 801 * @mode: mode to query 802 * @hdisplay: hdisplay value to fill in 803 * @vdisplay: vdisplay value to fill in 804 * 805 * The vdisplay value will be doubled if the specified mode is a stereo mode of 806 * the appropriate layout. 807 */ 808 void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 809 int *hdisplay, int *vdisplay) 810 { 811 struct drm_display_mode adjusted = *mode; 812 813 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 814 *hdisplay = adjusted.crtc_hdisplay; 815 *vdisplay = adjusted.crtc_vdisplay; 816 } 817 EXPORT_SYMBOL(drm_mode_get_hv_timing); 818 819 /** 820 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 821 * @p: mode 822 * @adjust_flags: a combination of adjustment flags 823 * 824 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 825 * 826 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 827 * interlaced modes. 828 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 829 * buffers containing two eyes (only adjust the timings when needed, eg. for 830 * "frame packing" or "side by side full"). 831 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 832 * be performed for doublescan and vscan > 1 modes respectively. 833 */ 834 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 835 { 836 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) 837 return; 838 839 p->crtc_clock = p->clock; 840 p->crtc_hdisplay = p->hdisplay; 841 p->crtc_hsync_start = p->hsync_start; 842 p->crtc_hsync_end = p->hsync_end; 843 p->crtc_htotal = p->htotal; 844 p->crtc_hskew = p->hskew; 845 p->crtc_vdisplay = p->vdisplay; 846 p->crtc_vsync_start = p->vsync_start; 847 p->crtc_vsync_end = p->vsync_end; 848 p->crtc_vtotal = p->vtotal; 849 850 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 851 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 852 p->crtc_vdisplay /= 2; 853 p->crtc_vsync_start /= 2; 854 p->crtc_vsync_end /= 2; 855 p->crtc_vtotal /= 2; 856 } 857 } 858 859 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 860 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 861 p->crtc_vdisplay *= 2; 862 p->crtc_vsync_start *= 2; 863 p->crtc_vsync_end *= 2; 864 p->crtc_vtotal *= 2; 865 } 866 } 867 868 if (!(adjust_flags & CRTC_NO_VSCAN)) { 869 if (p->vscan > 1) { 870 p->crtc_vdisplay *= p->vscan; 871 p->crtc_vsync_start *= p->vscan; 872 p->crtc_vsync_end *= p->vscan; 873 p->crtc_vtotal *= p->vscan; 874 } 875 } 876 877 if (adjust_flags & CRTC_STEREO_DOUBLE) { 878 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 879 880 switch (layout) { 881 case DRM_MODE_FLAG_3D_FRAME_PACKING: 882 p->crtc_clock *= 2; 883 p->crtc_vdisplay += p->crtc_vtotal; 884 p->crtc_vsync_start += p->crtc_vtotal; 885 p->crtc_vsync_end += p->crtc_vtotal; 886 p->crtc_vtotal += p->crtc_vtotal; 887 break; 888 } 889 } 890 891 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 892 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 893 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 894 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 895 } 896 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 897 898 /** 899 * drm_mode_copy - copy the mode 900 * @dst: mode to overwrite 901 * @src: mode to copy 902 * 903 * Copy an existing mode into another mode, preserving the object id and 904 * list head of the destination mode. 905 */ 906 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 907 { 908 int id = dst->base.id; 909 struct list_head head = dst->head; 910 911 *dst = *src; 912 dst->base.id = id; 913 dst->head = head; 914 } 915 EXPORT_SYMBOL(drm_mode_copy); 916 917 /** 918 * drm_mode_duplicate - allocate and duplicate an existing mode 919 * @dev: drm_device to allocate the duplicated mode for 920 * @mode: mode to duplicate 921 * 922 * Just allocate a new mode, copy the existing mode into it, and return 923 * a pointer to it. Used to create new instances of established modes. 924 * 925 * Returns: 926 * Pointer to duplicated mode on success, NULL on error. 927 */ 928 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 929 const struct drm_display_mode *mode) 930 { 931 struct drm_display_mode *nmode; 932 933 nmode = drm_mode_create(dev); 934 if (!nmode) 935 return NULL; 936 937 drm_mode_copy(nmode, mode); 938 939 return nmode; 940 } 941 EXPORT_SYMBOL(drm_mode_duplicate); 942 943 /** 944 * drm_mode_equal - test modes for equality 945 * @mode1: first mode 946 * @mode2: second mode 947 * 948 * Check to see if @mode1 and @mode2 are equivalent. 949 * 950 * Returns: 951 * True if the modes are equal, false otherwise. 952 */ 953 bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 954 { 955 if (!mode1 && !mode2) 956 return true; 957 958 if (!mode1 || !mode2) 959 return false; 960 961 /* do clock check convert to PICOS so fb modes get matched 962 * the same */ 963 if (mode1->clock && mode2->clock) { 964 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) 965 return false; 966 } else if (mode1->clock != mode2->clock) 967 return false; 968 969 return drm_mode_equal_no_clocks(mode1, mode2); 970 } 971 EXPORT_SYMBOL(drm_mode_equal); 972 973 /** 974 * drm_mode_equal_no_clocks - test modes for equality 975 * @mode1: first mode 976 * @mode2: second mode 977 * 978 * Check to see if @mode1 and @mode2 are equivalent, but 979 * don't check the pixel clocks. 980 * 981 * Returns: 982 * True if the modes are equal, false otherwise. 983 */ 984 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 985 { 986 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) != 987 (mode2->flags & DRM_MODE_FLAG_3D_MASK)) 988 return false; 989 990 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2); 991 } 992 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 993 994 /** 995 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 996 * @mode1: first mode 997 * @mode2: second mode 998 * 999 * Check to see if @mode1 and @mode2 are equivalent, but 1000 * don't check the pixel clocks nor the stereo layout. 1001 * 1002 * Returns: 1003 * True if the modes are equal, false otherwise. 1004 */ 1005 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 1006 const struct drm_display_mode *mode2) 1007 { 1008 if (mode1->hdisplay == mode2->hdisplay && 1009 mode1->hsync_start == mode2->hsync_start && 1010 mode1->hsync_end == mode2->hsync_end && 1011 mode1->htotal == mode2->htotal && 1012 mode1->hskew == mode2->hskew && 1013 mode1->vdisplay == mode2->vdisplay && 1014 mode1->vsync_start == mode2->vsync_start && 1015 mode1->vsync_end == mode2->vsync_end && 1016 mode1->vtotal == mode2->vtotal && 1017 mode1->vscan == mode2->vscan && 1018 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 1019 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK)) 1020 return true; 1021 1022 return false; 1023 } 1024 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1025 1026 /** 1027 * drm_mode_validate_basic - make sure the mode is somewhat sane 1028 * @mode: mode to check 1029 * 1030 * Check that the mode timings are at least somewhat reasonable. 1031 * Any hardware specific limits are left up for each driver to check. 1032 * 1033 * Returns: 1034 * The mode status 1035 */ 1036 enum drm_mode_status 1037 drm_mode_validate_basic(const struct drm_display_mode *mode) 1038 { 1039 if (mode->clock == 0) 1040 return MODE_CLOCK_LOW; 1041 1042 if (mode->hdisplay == 0 || 1043 mode->hsync_start < mode->hdisplay || 1044 mode->hsync_end < mode->hsync_start || 1045 mode->htotal < mode->hsync_end) 1046 return MODE_H_ILLEGAL; 1047 1048 if (mode->vdisplay == 0 || 1049 mode->vsync_start < mode->vdisplay || 1050 mode->vsync_end < mode->vsync_start || 1051 mode->vtotal < mode->vsync_end) 1052 return MODE_V_ILLEGAL; 1053 1054 return MODE_OK; 1055 } 1056 EXPORT_SYMBOL(drm_mode_validate_basic); 1057 1058 /** 1059 * drm_mode_validate_size - make sure modes adhere to size constraints 1060 * @mode: mode to check 1061 * @maxX: maximum width 1062 * @maxY: maximum height 1063 * 1064 * This function is a helper which can be used to validate modes against size 1065 * limitations of the DRM device/connector. If a mode is too big its status 1066 * member is updated with the appropriate validation failure code. The list 1067 * itself is not changed. 1068 * 1069 * Returns: 1070 * The mode status 1071 */ 1072 enum drm_mode_status 1073 drm_mode_validate_size(const struct drm_display_mode *mode, 1074 int maxX, int maxY) 1075 { 1076 if (maxX > 0 && mode->hdisplay > maxX) 1077 return MODE_VIRTUAL_X; 1078 1079 if (maxY > 0 && mode->vdisplay > maxY) 1080 return MODE_VIRTUAL_Y; 1081 1082 return MODE_OK; 1083 } 1084 EXPORT_SYMBOL(drm_mode_validate_size); 1085 1086 /** 1087 * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed 1088 * @mode: mode to check 1089 * @connector: drm connector under action 1090 * 1091 * This function is a helper which can be used to filter out any YCBCR420 1092 * only mode, when the source doesn't support it. 1093 * 1094 * Returns: 1095 * The mode status 1096 */ 1097 enum drm_mode_status 1098 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode, 1099 struct drm_connector *connector) 1100 { 1101 u8 vic = drm_match_cea_mode(mode); 1102 enum drm_mode_status status = MODE_OK; 1103 struct drm_hdmi_info *hdmi = &connector->display_info.hdmi; 1104 1105 if (test_bit(vic, hdmi->y420_vdb_modes)) { 1106 if (!connector->ycbcr_420_allowed) 1107 status = MODE_NO_420; 1108 } 1109 1110 return status; 1111 } 1112 EXPORT_SYMBOL(drm_mode_validate_ycbcr420); 1113 1114 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1115 1116 static const char * const drm_mode_status_names[] = { 1117 MODE_STATUS(OK), 1118 MODE_STATUS(HSYNC), 1119 MODE_STATUS(VSYNC), 1120 MODE_STATUS(H_ILLEGAL), 1121 MODE_STATUS(V_ILLEGAL), 1122 MODE_STATUS(BAD_WIDTH), 1123 MODE_STATUS(NOMODE), 1124 MODE_STATUS(NO_INTERLACE), 1125 MODE_STATUS(NO_DBLESCAN), 1126 MODE_STATUS(NO_VSCAN), 1127 MODE_STATUS(MEM), 1128 MODE_STATUS(VIRTUAL_X), 1129 MODE_STATUS(VIRTUAL_Y), 1130 MODE_STATUS(MEM_VIRT), 1131 MODE_STATUS(NOCLOCK), 1132 MODE_STATUS(CLOCK_HIGH), 1133 MODE_STATUS(CLOCK_LOW), 1134 MODE_STATUS(CLOCK_RANGE), 1135 MODE_STATUS(BAD_HVALUE), 1136 MODE_STATUS(BAD_VVALUE), 1137 MODE_STATUS(BAD_VSCAN), 1138 MODE_STATUS(HSYNC_NARROW), 1139 MODE_STATUS(HSYNC_WIDE), 1140 MODE_STATUS(HBLANK_NARROW), 1141 MODE_STATUS(HBLANK_WIDE), 1142 MODE_STATUS(VSYNC_NARROW), 1143 MODE_STATUS(VSYNC_WIDE), 1144 MODE_STATUS(VBLANK_NARROW), 1145 MODE_STATUS(VBLANK_WIDE), 1146 MODE_STATUS(PANEL), 1147 MODE_STATUS(INTERLACE_WIDTH), 1148 MODE_STATUS(ONE_WIDTH), 1149 MODE_STATUS(ONE_HEIGHT), 1150 MODE_STATUS(ONE_SIZE), 1151 MODE_STATUS(NO_REDUCED), 1152 MODE_STATUS(NO_STEREO), 1153 MODE_STATUS(NO_420), 1154 MODE_STATUS(STALE), 1155 MODE_STATUS(BAD), 1156 MODE_STATUS(ERROR), 1157 }; 1158 1159 #undef MODE_STATUS 1160 1161 static const char *drm_get_mode_status_name(enum drm_mode_status status) 1162 { 1163 int index = status + 3; 1164 1165 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1166 return ""; 1167 1168 return drm_mode_status_names[index]; 1169 } 1170 1171 /** 1172 * drm_mode_prune_invalid - remove invalid modes from mode list 1173 * @dev: DRM device 1174 * @mode_list: list of modes to check 1175 * @verbose: be verbose about it 1176 * 1177 * This helper function can be used to prune a display mode list after 1178 * validation has been completed. All modes who's status is not MODE_OK will be 1179 * removed from the list, and if @verbose the status code and mode name is also 1180 * printed to dmesg. 1181 */ 1182 void drm_mode_prune_invalid(struct drm_device *dev, 1183 struct list_head *mode_list, bool verbose) 1184 { 1185 struct drm_display_mode *mode, *t; 1186 1187 list_for_each_entry_safe(mode, t, mode_list, head) { 1188 if (mode->status != MODE_OK) { 1189 list_del(&mode->head); 1190 if (verbose) { 1191 drm_mode_debug_printmodeline(mode); 1192 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1193 mode->name, 1194 drm_get_mode_status_name(mode->status)); 1195 } 1196 drm_mode_destroy(dev, mode); 1197 } 1198 } 1199 } 1200 EXPORT_SYMBOL(drm_mode_prune_invalid); 1201 1202 /** 1203 * drm_mode_compare - compare modes for favorability 1204 * @priv: unused 1205 * @lh_a: list_head for first mode 1206 * @lh_b: list_head for second mode 1207 * 1208 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1209 * which is better. 1210 * 1211 * Returns: 1212 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1213 * positive if @lh_b is better than @lh_a. 1214 */ 1215 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) 1216 { 1217 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1218 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1219 int diff; 1220 1221 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1222 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1223 if (diff) 1224 return diff; 1225 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1226 if (diff) 1227 return diff; 1228 1229 diff = b->vrefresh - a->vrefresh; 1230 if (diff) 1231 return diff; 1232 1233 diff = b->clock - a->clock; 1234 return diff; 1235 } 1236 1237 /** 1238 * drm_mode_sort - sort mode list 1239 * @mode_list: list of drm_display_mode structures to sort 1240 * 1241 * Sort @mode_list by favorability, moving good modes to the head of the list. 1242 */ 1243 void drm_mode_sort(struct list_head *mode_list) 1244 { 1245 list_sort(NULL, mode_list, drm_mode_compare); 1246 } 1247 EXPORT_SYMBOL(drm_mode_sort); 1248 1249 /** 1250 * drm_mode_connector_list_update - update the mode list for the connector 1251 * @connector: the connector to update 1252 * 1253 * This moves the modes from the @connector probed_modes list 1254 * to the actual mode list. It compares the probed mode against the current 1255 * list and only adds different/new modes. 1256 * 1257 * This is just a helper functions doesn't validate any modes itself and also 1258 * doesn't prune any invalid modes. Callers need to do that themselves. 1259 */ 1260 void drm_mode_connector_list_update(struct drm_connector *connector) 1261 { 1262 struct drm_display_mode *pmode, *pt; 1263 1264 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1265 1266 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1267 struct drm_display_mode *mode; 1268 bool found_it = false; 1269 1270 /* go through current modes checking for the new probed mode */ 1271 list_for_each_entry(mode, &connector->modes, head) { 1272 if (!drm_mode_equal(pmode, mode)) 1273 continue; 1274 1275 found_it = true; 1276 1277 /* 1278 * If the old matching mode is stale (ie. left over 1279 * from a previous probe) just replace it outright. 1280 * Otherwise just merge the type bits between all 1281 * equal probed modes. 1282 * 1283 * If two probed modes are considered equal, pick the 1284 * actual timings from the one that's marked as 1285 * preferred (in case the match isn't 100%). If 1286 * multiple or zero preferred modes are present, favor 1287 * the mode added to the probed_modes list first. 1288 */ 1289 if (mode->status == MODE_STALE) { 1290 drm_mode_copy(mode, pmode); 1291 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1292 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1293 pmode->type |= mode->type; 1294 drm_mode_copy(mode, pmode); 1295 } else { 1296 mode->type |= pmode->type; 1297 } 1298 1299 list_del(&pmode->head); 1300 drm_mode_destroy(connector->dev, pmode); 1301 break; 1302 } 1303 1304 if (!found_it) { 1305 list_move_tail(&pmode->head, &connector->modes); 1306 } 1307 } 1308 } 1309 EXPORT_SYMBOL(drm_mode_connector_list_update); 1310 1311 /** 1312 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1313 * @mode_option: optional per connector mode option 1314 * @connector: connector to parse modeline for 1315 * @mode: preallocated drm_cmdline_mode structure to fill out 1316 * 1317 * This parses @mode_option command line modeline for modes and options to 1318 * configure the connector. If @mode_option is NULL the default command line 1319 * modeline in fb_mode_option will be parsed instead. 1320 * 1321 * This uses the same parameters as the fb modedb.c, except for an extra 1322 * force-enable, force-enable-digital and force-disable bit at the end: 1323 * 1324 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1325 * 1326 * The intermediate drm_cmdline_mode structure is required to store additional 1327 * options from the command line modline like the force-enable/disable flag. 1328 * 1329 * Returns: 1330 * True if a valid modeline has been parsed, false otherwise. 1331 */ 1332 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1333 struct drm_connector *connector, 1334 struct drm_cmdline_mode *mode) 1335 { 1336 const char *name; 1337 unsigned int namelen; 1338 bool res_specified = false, bpp_specified = false, refresh_specified = false; 1339 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; 1340 bool yres_specified = false, cvt = false, rb = false; 1341 bool interlace = false, margins = false, was_digit = false; 1342 int i; 1343 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; 1344 1345 #ifdef CONFIG_FB 1346 if (!mode_option) 1347 mode_option = fb_mode_option; 1348 #endif 1349 1350 if (!mode_option) { 1351 mode->specified = false; 1352 return false; 1353 } 1354 1355 name = mode_option; 1356 namelen = strlen(name); 1357 for (i = namelen-1; i >= 0; i--) { 1358 switch (name[i]) { 1359 case '@': 1360 if (!refresh_specified && !bpp_specified && 1361 !yres_specified && !cvt && !rb && was_digit) { 1362 refresh = simple_strtol(&name[i+1], NULL, 10); 1363 refresh_specified = true; 1364 was_digit = false; 1365 } else 1366 goto done; 1367 break; 1368 case '-': 1369 if (!bpp_specified && !yres_specified && !cvt && 1370 !rb && was_digit) { 1371 bpp = simple_strtol(&name[i+1], NULL, 10); 1372 bpp_specified = true; 1373 was_digit = false; 1374 } else 1375 goto done; 1376 break; 1377 case 'x': 1378 if (!yres_specified && was_digit) { 1379 yres = simple_strtol(&name[i+1], NULL, 10); 1380 yres_specified = true; 1381 was_digit = false; 1382 } else 1383 goto done; 1384 break; 1385 case '0' ... '9': 1386 was_digit = true; 1387 break; 1388 case 'M': 1389 if (yres_specified || cvt || was_digit) 1390 goto done; 1391 cvt = true; 1392 break; 1393 case 'R': 1394 if (yres_specified || cvt || rb || was_digit) 1395 goto done; 1396 rb = true; 1397 break; 1398 case 'm': 1399 if (cvt || yres_specified || was_digit) 1400 goto done; 1401 margins = true; 1402 break; 1403 case 'i': 1404 if (cvt || yres_specified || was_digit) 1405 goto done; 1406 interlace = true; 1407 break; 1408 case 'e': 1409 if (yres_specified || bpp_specified || refresh_specified || 1410 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1411 goto done; 1412 1413 force = DRM_FORCE_ON; 1414 break; 1415 case 'D': 1416 if (yres_specified || bpp_specified || refresh_specified || 1417 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1418 goto done; 1419 1420 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1421 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1422 force = DRM_FORCE_ON; 1423 else 1424 force = DRM_FORCE_ON_DIGITAL; 1425 break; 1426 case 'd': 1427 if (yres_specified || bpp_specified || refresh_specified || 1428 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1429 goto done; 1430 1431 force = DRM_FORCE_OFF; 1432 break; 1433 default: 1434 goto done; 1435 } 1436 } 1437 1438 if (i < 0 && yres_specified) { 1439 char *ch; 1440 xres = simple_strtol(name, &ch, 10); 1441 if ((ch != NULL) && (*ch == 'x')) 1442 res_specified = true; 1443 else 1444 i = ch - name; 1445 } else if (!yres_specified && was_digit) { 1446 /* catch mode that begins with digits but has no 'x' */ 1447 i = 0; 1448 } 1449 done: 1450 if (i >= 0) { 1451 pr_warn("[drm] parse error at position %i in video mode '%s'\n", 1452 i, name); 1453 mode->specified = false; 1454 return false; 1455 } 1456 1457 if (res_specified) { 1458 mode->specified = true; 1459 mode->xres = xres; 1460 mode->yres = yres; 1461 } 1462 1463 if (refresh_specified) { 1464 mode->refresh_specified = true; 1465 mode->refresh = refresh; 1466 } 1467 1468 if (bpp_specified) { 1469 mode->bpp_specified = true; 1470 mode->bpp = bpp; 1471 } 1472 mode->rb = rb; 1473 mode->cvt = cvt; 1474 mode->interlace = interlace; 1475 mode->margins = margins; 1476 mode->force = force; 1477 1478 return true; 1479 } 1480 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1481 1482 /** 1483 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1484 * @dev: DRM device to create the new mode for 1485 * @cmd: input command line modeline 1486 * 1487 * Returns: 1488 * Pointer to converted mode on success, NULL on error. 1489 */ 1490 struct drm_display_mode * 1491 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1492 struct drm_cmdline_mode *cmd) 1493 { 1494 struct drm_display_mode *mode; 1495 1496 if (cmd->cvt) 1497 mode = drm_cvt_mode(dev, 1498 cmd->xres, cmd->yres, 1499 cmd->refresh_specified ? cmd->refresh : 60, 1500 cmd->rb, cmd->interlace, 1501 cmd->margins); 1502 else 1503 mode = drm_gtf_mode(dev, 1504 cmd->xres, cmd->yres, 1505 cmd->refresh_specified ? cmd->refresh : 60, 1506 cmd->interlace, 1507 cmd->margins); 1508 if (!mode) 1509 return NULL; 1510 1511 mode->type |= DRM_MODE_TYPE_USERDEF; 1512 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ 1513 if (cmd->xres == 1366) 1514 drm_mode_fixup_1366x768(mode); 1515 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1516 return mode; 1517 } 1518 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1519 1520 /** 1521 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1522 * @out: drm_mode_modeinfo struct to return to the user 1523 * @in: drm_display_mode to use 1524 * 1525 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1526 * the user. 1527 */ 1528 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1529 const struct drm_display_mode *in) 1530 { 1531 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1532 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1533 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1534 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1535 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1536 "timing values too large for mode info\n"); 1537 1538 out->clock = in->clock; 1539 out->hdisplay = in->hdisplay; 1540 out->hsync_start = in->hsync_start; 1541 out->hsync_end = in->hsync_end; 1542 out->htotal = in->htotal; 1543 out->hskew = in->hskew; 1544 out->vdisplay = in->vdisplay; 1545 out->vsync_start = in->vsync_start; 1546 out->vsync_end = in->vsync_end; 1547 out->vtotal = in->vtotal; 1548 out->vscan = in->vscan; 1549 out->vrefresh = in->vrefresh; 1550 out->flags = in->flags; 1551 out->type = in->type; 1552 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1553 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1554 } 1555 1556 /** 1557 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1558 * @out: drm_display_mode to return to the user 1559 * @in: drm_mode_modeinfo to use 1560 * 1561 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1562 * the caller. 1563 * 1564 * Returns: 1565 * Zero on success, negative errno on failure. 1566 */ 1567 int drm_mode_convert_umode(struct drm_display_mode *out, 1568 const struct drm_mode_modeinfo *in) 1569 { 1570 int ret = -EINVAL; 1571 1572 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) { 1573 ret = -ERANGE; 1574 goto out; 1575 } 1576 1577 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1578 goto out; 1579 1580 out->clock = in->clock; 1581 out->hdisplay = in->hdisplay; 1582 out->hsync_start = in->hsync_start; 1583 out->hsync_end = in->hsync_end; 1584 out->htotal = in->htotal; 1585 out->hskew = in->hskew; 1586 out->vdisplay = in->vdisplay; 1587 out->vsync_start = in->vsync_start; 1588 out->vsync_end = in->vsync_end; 1589 out->vtotal = in->vtotal; 1590 out->vscan = in->vscan; 1591 out->vrefresh = in->vrefresh; 1592 out->flags = in->flags; 1593 out->type = in->type; 1594 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1595 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1596 1597 out->status = drm_mode_validate_basic(out); 1598 if (out->status != MODE_OK) 1599 goto out; 1600 1601 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 1602 1603 ret = 0; 1604 1605 out: 1606 return ret; 1607 } 1608 1609 /** 1610 * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420 1611 * output format 1612 * 1613 * @display: display under action 1614 * @mode: video mode to be tested. 1615 * 1616 * Returns: 1617 * true if the mode can be supported in YCBCR420 format 1618 * false if not. 1619 */ 1620 bool drm_mode_is_420_only(const struct drm_display_info *display, 1621 const struct drm_display_mode *mode) 1622 { 1623 u8 vic = drm_match_cea_mode(mode); 1624 1625 return test_bit(vic, display->hdmi.y420_vdb_modes); 1626 } 1627 EXPORT_SYMBOL(drm_mode_is_420_only); 1628 1629 /** 1630 * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420 1631 * output format also (along with RGB/YCBCR444/422) 1632 * 1633 * @display: display under action. 1634 * @mode: video mode to be tested. 1635 * 1636 * Returns: 1637 * true if the mode can be support YCBCR420 format 1638 * false if not. 1639 */ 1640 bool drm_mode_is_420_also(const struct drm_display_info *display, 1641 const struct drm_display_mode *mode) 1642 { 1643 u8 vic = drm_match_cea_mode(mode); 1644 1645 return test_bit(vic, display->hdmi.y420_cmdb_modes); 1646 } 1647 EXPORT_SYMBOL(drm_mode_is_420_also); 1648 /** 1649 * drm_mode_is_420 - if a given videomode can be supported in YCBCR420 1650 * output format 1651 * 1652 * @display: display under action. 1653 * @mode: video mode to be tested. 1654 * 1655 * Returns: 1656 * true if the mode can be supported in YCBCR420 format 1657 * false if not. 1658 */ 1659 bool drm_mode_is_420(const struct drm_display_info *display, 1660 const struct drm_display_mode *mode) 1661 { 1662 return drm_mode_is_420_only(display, mode) || 1663 drm_mode_is_420_also(display, mode); 1664 } 1665 EXPORT_SYMBOL(drm_mode_is_420); 1666