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 #ifdef __linux__ 34 #include <linux/list.h> 35 #include <linux/list_sort.h> 36 #include <linux/export.h> 37 #endif 38 #include <dev/pci/drm/drmP.h> 39 #include <dev/pci/drm/drm_crtc.h> 40 #ifdef __linux__ 41 #include <video/of_videomode.h> 42 #include <video/videomode.h> 43 #endif 44 #include <dev/pci/drm/drm_modes.h> 45 46 #include "drm_crtc_internal.h" 47 48 /** 49 * drm_mode_debug_printmodeline - print a mode to dmesg 50 * @mode: mode to print 51 * 52 * Describe @mode using DRM_DEBUG. 53 */ 54 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) 55 { 56 DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d " 57 "0x%x 0x%x\n", 58 mode->base.id, mode->name, mode->vrefresh, mode->clock, 59 mode->hdisplay, mode->hsync_start, 60 mode->hsync_end, mode->htotal, 61 mode->vdisplay, mode->vsync_start, 62 mode->vsync_end, mode->vtotal, mode->type, mode->flags); 63 } 64 EXPORT_SYMBOL(drm_mode_debug_printmodeline); 65 66 /** 67 * drm_mode_create - create a new display mode 68 * @dev: DRM device 69 * 70 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it 71 * and return it. 72 * 73 * Returns: 74 * Pointer to new mode on success, NULL on error. 75 */ 76 struct drm_display_mode *drm_mode_create(struct drm_device *dev) 77 { 78 struct drm_display_mode *nmode; 79 80 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); 81 if (!nmode) 82 return NULL; 83 84 if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) { 85 kfree(nmode); 86 return NULL; 87 } 88 89 return nmode; 90 } 91 EXPORT_SYMBOL(drm_mode_create); 92 93 /** 94 * drm_mode_destroy - remove a mode 95 * @dev: DRM device 96 * @mode: mode to remove 97 * 98 * Release @mode's unique ID, then free it @mode structure itself using kfree. 99 */ 100 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) 101 { 102 if (!mode) 103 return; 104 105 drm_mode_object_put(dev, &mode->base); 106 107 kfree(mode); 108 } 109 EXPORT_SYMBOL(drm_mode_destroy); 110 111 /** 112 * drm_mode_probed_add - add a mode to a connector's probed_mode list 113 * @connector: connector the new mode 114 * @mode: mode data 115 * 116 * Add @mode to @connector's probed_mode list for later use. This list should 117 * then in a second step get filtered and all the modes actually supported by 118 * the hardware moved to the @connector's modes list. 119 */ 120 void drm_mode_probed_add(struct drm_connector *connector, 121 struct drm_display_mode *mode) 122 { 123 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 124 125 list_add_tail(&mode->head, &connector->probed_modes); 126 } 127 EXPORT_SYMBOL(drm_mode_probed_add); 128 129 /** 130 * drm_cvt_mode -create a modeline based on the CVT algorithm 131 * @dev: drm device 132 * @hdisplay: hdisplay size 133 * @vdisplay: vdisplay size 134 * @vrefresh: vrefresh rate 135 * @reduced: whether to use reduced blanking 136 * @interlaced: whether to compute an interlaced mode 137 * @margins: whether to add margins (borders) 138 * 139 * This function is called to generate the modeline based on CVT algorithm 140 * according to the hdisplay, vdisplay, vrefresh. 141 * It is based from the VESA(TM) Coordinated Video Timing Generator by 142 * Graham Loveridge April 9, 2003 available at 143 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 144 * 145 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 146 * What I have done is to translate it by using integer calculation. 147 * 148 * Returns: 149 * The modeline based on the CVT algorithm stored in a drm_display_mode object. 150 * The display mode object is allocated with drm_mode_create(). Returns NULL 151 * when no mode could be allocated. 152 */ 153 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 154 int vdisplay, int vrefresh, 155 bool reduced, bool interlaced, bool margins) 156 { 157 #define HV_FACTOR 1000 158 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 159 #define CVT_MARGIN_PERCENTAGE 18 160 /* 2) character cell horizontal granularity (pixels) - default 8 */ 161 #define CVT_H_GRANULARITY 8 162 /* 3) Minimum vertical porch (lines) - default 3 */ 163 #define CVT_MIN_V_PORCH 3 164 /* 4) Minimum number of vertical back porch lines - default 6 */ 165 #define CVT_MIN_V_BPORCH 6 166 /* Pixel Clock step (kHz) */ 167 #define CVT_CLOCK_STEP 250 168 struct drm_display_mode *drm_mode; 169 unsigned int vfieldrate, hperiod; 170 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 171 int interlace; 172 173 /* allocate the drm_display_mode structure. If failure, we will 174 * return directly 175 */ 176 drm_mode = drm_mode_create(dev); 177 if (!drm_mode) 178 return NULL; 179 180 /* the CVT default refresh rate is 60Hz */ 181 if (!vrefresh) 182 vrefresh = 60; 183 184 /* the required field fresh rate */ 185 if (interlaced) 186 vfieldrate = vrefresh * 2; 187 else 188 vfieldrate = vrefresh; 189 190 /* horizontal pixels */ 191 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 192 193 /* determine the left&right borders */ 194 hmargin = 0; 195 if (margins) { 196 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 197 hmargin -= hmargin % CVT_H_GRANULARITY; 198 } 199 /* find the total active pixels */ 200 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 201 202 /* find the number of lines per field */ 203 if (interlaced) 204 vdisplay_rnd = vdisplay / 2; 205 else 206 vdisplay_rnd = vdisplay; 207 208 /* find the top & bottom borders */ 209 vmargin = 0; 210 if (margins) 211 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 212 213 drm_mode->vdisplay = vdisplay + 2 * vmargin; 214 215 /* Interlaced */ 216 if (interlaced) 217 interlace = 1; 218 else 219 interlace = 0; 220 221 /* Determine VSync Width from aspect ratio */ 222 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 223 vsync = 4; 224 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 225 vsync = 5; 226 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 227 vsync = 6; 228 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 229 vsync = 7; 230 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 231 vsync = 7; 232 else /* custom */ 233 vsync = 10; 234 235 if (!reduced) { 236 /* simplify the GTF calculation */ 237 /* 4) Minimum time of vertical sync + back porch interval (µs) 238 * default 550.0 239 */ 240 int tmp1, tmp2; 241 #define CVT_MIN_VSYNC_BP 550 242 /* 3) Nominal HSync width (% of line period) - default 8 */ 243 #define CVT_HSYNC_PERCENTAGE 8 244 unsigned int hblank_percentage; 245 int vsyncandback_porch, vback_porch, hblank; 246 247 /* estimated the horizontal period */ 248 tmp1 = HV_FACTOR * 1000000 - 249 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 250 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 251 interlace; 252 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 253 254 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 255 /* 9. Find number of lines in sync + backporch */ 256 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 257 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 258 else 259 vsyncandback_porch = tmp1; 260 /* 10. Find number of lines in back porch */ 261 vback_porch = vsyncandback_porch - vsync; 262 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 263 vsyncandback_porch + CVT_MIN_V_PORCH; 264 /* 5) Definition of Horizontal blanking time limitation */ 265 /* Gradient (%/kHz) - default 600 */ 266 #define CVT_M_FACTOR 600 267 /* Offset (%) - default 40 */ 268 #define CVT_C_FACTOR 40 269 /* Blanking time scaling factor - default 128 */ 270 #define CVT_K_FACTOR 128 271 /* Scaling factor weighting - default 20 */ 272 #define CVT_J_FACTOR 20 273 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 274 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 275 CVT_J_FACTOR) 276 /* 12. Find ideal blanking duty cycle from formula */ 277 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 278 hperiod / 1000; 279 /* 13. Blanking time */ 280 if (hblank_percentage < 20 * HV_FACTOR) 281 hblank_percentage = 20 * HV_FACTOR; 282 hblank = drm_mode->hdisplay * hblank_percentage / 283 (100 * HV_FACTOR - hblank_percentage); 284 hblank -= hblank % (2 * CVT_H_GRANULARITY); 285 /* 14. find the total pixels per line */ 286 drm_mode->htotal = drm_mode->hdisplay + hblank; 287 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 288 drm_mode->hsync_start = drm_mode->hsync_end - 289 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 290 drm_mode->hsync_start += CVT_H_GRANULARITY - 291 drm_mode->hsync_start % CVT_H_GRANULARITY; 292 /* fill the Vsync values */ 293 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 294 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 295 } else { 296 /* Reduced blanking */ 297 /* Minimum vertical blanking interval time (µs)- default 460 */ 298 #define CVT_RB_MIN_VBLANK 460 299 /* Fixed number of clocks for horizontal sync */ 300 #define CVT_RB_H_SYNC 32 301 /* Fixed number of clocks for horizontal blanking */ 302 #define CVT_RB_H_BLANK 160 303 /* Fixed number of lines for vertical front porch - default 3*/ 304 #define CVT_RB_VFPORCH 3 305 int vbilines; 306 int tmp1, tmp2; 307 /* 8. Estimate Horizontal period. */ 308 tmp1 = HV_FACTOR * 1000000 - 309 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 310 tmp2 = vdisplay_rnd + 2 * vmargin; 311 hperiod = tmp1 / (tmp2 * vfieldrate); 312 /* 9. Find number of lines in vertical blanking */ 313 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 314 /* 10. Check if vertical blanking is sufficient */ 315 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 316 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 317 /* 11. Find total number of lines in vertical field */ 318 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 319 /* 12. Find total number of pixels in a line */ 320 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 321 /* Fill in HSync values */ 322 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 323 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 324 /* Fill in VSync values */ 325 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 326 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 327 } 328 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 329 drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod; 330 drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP; 331 /* 18/16. Find actual vertical frame frequency */ 332 /* ignore - just set the mode flag for interlaced */ 333 if (interlaced) { 334 drm_mode->vtotal *= 2; 335 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 336 } 337 /* Fill the mode line name */ 338 drm_mode_set_name(drm_mode); 339 if (reduced) 340 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 341 DRM_MODE_FLAG_NVSYNC); 342 else 343 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 344 DRM_MODE_FLAG_NHSYNC); 345 346 return drm_mode; 347 } 348 EXPORT_SYMBOL(drm_cvt_mode); 349 350 /** 351 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm 352 * @dev: drm device 353 * @hdisplay: hdisplay size 354 * @vdisplay: vdisplay size 355 * @vrefresh: vrefresh rate. 356 * @interlaced: whether to compute an interlaced mode 357 * @margins: desired margin (borders) size 358 * @GTF_M: extended GTF formula parameters 359 * @GTF_2C: extended GTF formula parameters 360 * @GTF_K: extended GTF formula parameters 361 * @GTF_2J: extended GTF formula parameters 362 * 363 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 364 * in here multiplied by two. For a C of 40, pass in 80. 365 * 366 * Returns: 367 * The modeline based on the full GTF algorithm stored in a drm_display_mode object. 368 * The display mode object is allocated with drm_mode_create(). Returns NULL 369 * when no mode could be allocated. 370 */ 371 struct drm_display_mode * 372 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 373 int vrefresh, bool interlaced, int margins, 374 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 375 { /* 1) top/bottom margin size (% of height) - default: 1.8, */ 376 #define GTF_MARGIN_PERCENTAGE 18 377 /* 2) character cell horizontal granularity (pixels) - default 8 */ 378 #define GTF_CELL_GRAN 8 379 /* 3) Minimum vertical porch (lines) - default 3 */ 380 #define GTF_MIN_V_PORCH 1 381 /* width of vsync in lines */ 382 #define V_SYNC_RQD 3 383 /* width of hsync as % of total line */ 384 #define H_SYNC_PERCENT 8 385 /* min time of vsync + back porch (microsec) */ 386 #define MIN_VSYNC_PLUS_BP 550 387 /* C' and M' are part of the Blanking Duty Cycle computation */ 388 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 389 #define GTF_M_PRIME (GTF_K * GTF_M / 256) 390 struct drm_display_mode *drm_mode; 391 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 392 int top_margin, bottom_margin; 393 int interlace; 394 unsigned int hfreq_est; 395 int vsync_plus_bp, vback_porch; 396 unsigned int vtotal_lines, vfieldrate_est, hperiod; 397 unsigned int vfield_rate, vframe_rate; 398 int left_margin, right_margin; 399 unsigned int total_active_pixels, ideal_duty_cycle; 400 unsigned int hblank, total_pixels, pixel_freq; 401 int hsync, hfront_porch, vodd_front_porch_lines; 402 unsigned int tmp1, tmp2; 403 404 drm_mode = drm_mode_create(dev); 405 if (!drm_mode) 406 return NULL; 407 408 /* 1. In order to give correct results, the number of horizontal 409 * pixels requested is first processed to ensure that it is divisible 410 * by the character size, by rounding it to the nearest character 411 * cell boundary: 412 */ 413 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 414 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 415 416 /* 2. If interlace is requested, the number of vertical lines assumed 417 * by the calculation must be halved, as the computation calculates 418 * the number of vertical lines per field. 419 */ 420 if (interlaced) 421 vdisplay_rnd = vdisplay / 2; 422 else 423 vdisplay_rnd = vdisplay; 424 425 /* 3. Find the frame rate required: */ 426 if (interlaced) 427 vfieldrate_rqd = vrefresh * 2; 428 else 429 vfieldrate_rqd = vrefresh; 430 431 /* 4. Find number of lines in Top margin: */ 432 top_margin = 0; 433 if (margins) 434 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 435 1000; 436 /* 5. Find number of lines in bottom margin: */ 437 bottom_margin = top_margin; 438 439 /* 6. If interlace is required, then set variable interlace: */ 440 if (interlaced) 441 interlace = 1; 442 else 443 interlace = 0; 444 445 /* 7. Estimate the Horizontal frequency */ 446 { 447 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 448 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 449 2 + interlace; 450 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 451 } 452 453 /* 8. Find the number of lines in V sync + back porch */ 454 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 455 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 456 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 457 /* 9. Find the number of lines in V back porch alone: */ 458 vback_porch = vsync_plus_bp - V_SYNC_RQD; 459 /* 10. Find the total number of lines in Vertical field period: */ 460 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 461 vsync_plus_bp + GTF_MIN_V_PORCH; 462 /* 11. Estimate the Vertical field frequency: */ 463 vfieldrate_est = hfreq_est / vtotal_lines; 464 /* 12. Find the actual horizontal period: */ 465 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 466 467 /* 13. Find the actual Vertical field frequency: */ 468 vfield_rate = hfreq_est / vtotal_lines; 469 /* 14. Find the Vertical frame frequency: */ 470 if (interlaced) 471 vframe_rate = vfield_rate / 2; 472 else 473 vframe_rate = vfield_rate; 474 /* 15. Find number of pixels in left margin: */ 475 if (margins) 476 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 477 1000; 478 else 479 left_margin = 0; 480 481 /* 16.Find number of pixels in right margin: */ 482 right_margin = left_margin; 483 /* 17.Find total number of active pixels in image and left and right */ 484 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 485 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 486 ideal_duty_cycle = GTF_C_PRIME * 1000 - 487 (GTF_M_PRIME * 1000000 / hfreq_est); 488 /* 19.Find the number of pixels in the blanking time to the nearest 489 * double character cell: */ 490 hblank = total_active_pixels * ideal_duty_cycle / 491 (100000 - ideal_duty_cycle); 492 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 493 hblank = hblank * 2 * GTF_CELL_GRAN; 494 /* 20.Find total number of pixels: */ 495 total_pixels = total_active_pixels + hblank; 496 /* 21.Find pixel clock frequency: */ 497 pixel_freq = total_pixels * hfreq_est / 1000; 498 /* Stage 1 computations are now complete; I should really pass 499 * the results to another function and do the Stage 2 computations, 500 * but I only need a few more values so I'll just append the 501 * computations here for now */ 502 /* 17. Find the number of pixels in the horizontal sync period: */ 503 hsync = H_SYNC_PERCENT * total_pixels / 100; 504 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 505 hsync = hsync * GTF_CELL_GRAN; 506 /* 18. Find the number of pixels in horizontal front porch period */ 507 hfront_porch = hblank / 2 - hsync; 508 /* 36. Find the number of lines in the odd front porch period: */ 509 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 510 511 /* finally, pack the results in the mode struct */ 512 drm_mode->hdisplay = hdisplay_rnd; 513 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 514 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 515 drm_mode->htotal = total_pixels; 516 drm_mode->vdisplay = vdisplay_rnd; 517 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 518 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 519 drm_mode->vtotal = vtotal_lines; 520 521 drm_mode->clock = pixel_freq; 522 523 if (interlaced) { 524 drm_mode->vtotal *= 2; 525 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 526 } 527 528 drm_mode_set_name(drm_mode); 529 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 530 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 531 else 532 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 533 534 return drm_mode; 535 } 536 EXPORT_SYMBOL(drm_gtf_mode_complex); 537 538 /** 539 * drm_gtf_mode - create the modeline based on the GTF algorithm 540 * @dev: drm device 541 * @hdisplay: hdisplay size 542 * @vdisplay: vdisplay size 543 * @vrefresh: vrefresh rate. 544 * @interlaced: whether to compute an interlaced mode 545 * @margins: desired margin (borders) size 546 * 547 * return the modeline based on GTF algorithm 548 * 549 * This function is to create the modeline based on the GTF algorithm. 550 * Generalized Timing Formula is derived from: 551 * GTF Spreadsheet by Andy Morrish (1/5/97) 552 * available at http://www.vesa.org 553 * 554 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 555 * What I have done is to translate it by using integer calculation. 556 * I also refer to the function of fb_get_mode in the file of 557 * drivers/video/fbmon.c 558 * 559 * Standard GTF parameters: 560 * M = 600 561 * C = 40 562 * K = 128 563 * J = 20 564 * 565 * Returns: 566 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 567 * The display mode object is allocated with drm_mode_create(). Returns NULL 568 * when no mode could be allocated. 569 */ 570 struct drm_display_mode * 571 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 572 bool interlaced, int margins) 573 { 574 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 575 interlaced, margins, 576 600, 40 * 2, 128, 20 * 2); 577 } 578 EXPORT_SYMBOL(drm_gtf_mode); 579 580 #ifdef CONFIG_VIDEOMODE_HELPERS 581 /** 582 * drm_display_mode_from_videomode - fill in @dmode using @vm, 583 * @vm: videomode structure to use as source 584 * @dmode: drm_display_mode structure to use as destination 585 * 586 * Fills out @dmode using the display mode specified in @vm. 587 */ 588 void drm_display_mode_from_videomode(const struct videomode *vm, 589 struct drm_display_mode *dmode) 590 { 591 dmode->hdisplay = vm->hactive; 592 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 593 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 594 dmode->htotal = dmode->hsync_end + vm->hback_porch; 595 596 dmode->vdisplay = vm->vactive; 597 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 598 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 599 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 600 601 dmode->clock = vm->pixelclock / 1000; 602 603 dmode->flags = 0; 604 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 605 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 606 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 607 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 608 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 609 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 610 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 611 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 612 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 613 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 614 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 615 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 616 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 617 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 618 drm_mode_set_name(dmode); 619 } 620 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 621 622 /** 623 * drm_display_mode_to_videomode - fill in @vm using @dmode, 624 * @dmode: drm_display_mode structure to use as source 625 * @vm: videomode structure to use as destination 626 * 627 * Fills out @vm using the display mode specified in @dmode. 628 */ 629 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 630 struct videomode *vm) 631 { 632 vm->hactive = dmode->hdisplay; 633 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 634 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 635 vm->hback_porch = dmode->htotal - dmode->hsync_end; 636 637 vm->vactive = dmode->vdisplay; 638 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 639 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 640 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 641 642 vm->pixelclock = dmode->clock * 1000; 643 644 vm->flags = 0; 645 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 646 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 647 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 648 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 649 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 650 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 651 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 652 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 653 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 654 vm->flags |= DISPLAY_FLAGS_INTERLACED; 655 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 656 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 657 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 658 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 659 } 660 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 661 662 #ifdef CONFIG_OF 663 /** 664 * of_get_drm_display_mode - get a drm_display_mode from devicetree 665 * @np: device_node with the timing specification 666 * @dmode: will be set to the return value 667 * @index: index into the list of display timings in devicetree 668 * 669 * This function is expensive and should only be used, if only one mode is to be 670 * read from DT. To get multiple modes start with of_get_display_timings and 671 * work with that instead. 672 * 673 * Returns: 674 * 0 on success, a negative errno code when no of videomode node was found. 675 */ 676 int of_get_drm_display_mode(struct device_node *np, 677 struct drm_display_mode *dmode, int index) 678 { 679 struct videomode vm; 680 int ret; 681 682 ret = of_get_videomode(np, &vm, index); 683 if (ret) 684 return ret; 685 686 drm_display_mode_from_videomode(&vm, dmode); 687 688 pr_debug("%s: got %dx%d display mode from %s\n", 689 of_node_full_name(np), vm.hactive, vm.vactive, np->name); 690 drm_mode_debug_printmodeline(dmode); 691 692 return 0; 693 } 694 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 695 #endif /* CONFIG_OF */ 696 #endif /* CONFIG_VIDEOMODE_HELPERS */ 697 698 /** 699 * drm_mode_set_name - set the name on a mode 700 * @mode: name will be set in this mode 701 * 702 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 703 * with an optional 'i' suffix for interlaced modes. 704 */ 705 void drm_mode_set_name(struct drm_display_mode *mode) 706 { 707 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 708 709 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 710 mode->hdisplay, mode->vdisplay, 711 interlaced ? "i" : ""); 712 } 713 EXPORT_SYMBOL(drm_mode_set_name); 714 715 /** drm_mode_hsync - get the hsync of a mode 716 * @mode: mode 717 * 718 * Returns: 719 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the 720 * value first if it is not yet set. 721 */ 722 int drm_mode_hsync(const struct drm_display_mode *mode) 723 { 724 unsigned int calc_val; 725 726 if (mode->hsync) 727 return mode->hsync; 728 729 if (mode->htotal < 0) 730 return 0; 731 732 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ 733 calc_val += 500; /* round to 1000Hz */ 734 calc_val /= 1000; /* truncate to kHz */ 735 736 return calc_val; 737 } 738 EXPORT_SYMBOL(drm_mode_hsync); 739 740 /** 741 * drm_mode_vrefresh - get the vrefresh of a mode 742 * @mode: mode 743 * 744 * Returns: 745 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 746 * value first if it is not yet set. 747 */ 748 int drm_mode_vrefresh(const struct drm_display_mode *mode) 749 { 750 int refresh = 0; 751 unsigned int calc_val; 752 753 if (mode->vrefresh > 0) 754 refresh = mode->vrefresh; 755 else if (mode->htotal > 0 && mode->vtotal > 0) { 756 int vtotal; 757 vtotal = mode->vtotal; 758 /* work out vrefresh the value will be x1000 */ 759 calc_val = (mode->clock * 1000); 760 calc_val /= mode->htotal; 761 refresh = (calc_val + vtotal / 2) / vtotal; 762 763 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 764 refresh *= 2; 765 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 766 refresh /= 2; 767 if (mode->vscan > 1) 768 refresh /= mode->vscan; 769 } 770 return refresh; 771 } 772 EXPORT_SYMBOL(drm_mode_vrefresh); 773 774 /** 775 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 776 * @p: mode 777 * @adjust_flags: a combination of adjustment flags 778 * 779 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 780 * 781 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 782 * interlaced modes. 783 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 784 * buffers containing two eyes (only adjust the timings when needed, eg. for 785 * "frame packing" or "side by side full"). 786 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 787 * be performed for doublescan and vscan > 1 modes respectively. 788 */ 789 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 790 { 791 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) 792 return; 793 794 p->crtc_clock = p->clock; 795 p->crtc_hdisplay = p->hdisplay; 796 p->crtc_hsync_start = p->hsync_start; 797 p->crtc_hsync_end = p->hsync_end; 798 p->crtc_htotal = p->htotal; 799 p->crtc_hskew = p->hskew; 800 p->crtc_vdisplay = p->vdisplay; 801 p->crtc_vsync_start = p->vsync_start; 802 p->crtc_vsync_end = p->vsync_end; 803 p->crtc_vtotal = p->vtotal; 804 805 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 806 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 807 p->crtc_vdisplay /= 2; 808 p->crtc_vsync_start /= 2; 809 p->crtc_vsync_end /= 2; 810 p->crtc_vtotal /= 2; 811 } 812 } 813 814 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 815 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 816 p->crtc_vdisplay *= 2; 817 p->crtc_vsync_start *= 2; 818 p->crtc_vsync_end *= 2; 819 p->crtc_vtotal *= 2; 820 } 821 } 822 823 if (!(adjust_flags & CRTC_NO_VSCAN)) { 824 if (p->vscan > 1) { 825 p->crtc_vdisplay *= p->vscan; 826 p->crtc_vsync_start *= p->vscan; 827 p->crtc_vsync_end *= p->vscan; 828 p->crtc_vtotal *= p->vscan; 829 } 830 } 831 832 if (adjust_flags & CRTC_STEREO_DOUBLE) { 833 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 834 835 switch (layout) { 836 case DRM_MODE_FLAG_3D_FRAME_PACKING: 837 p->crtc_clock *= 2; 838 p->crtc_vdisplay += p->crtc_vtotal; 839 p->crtc_vsync_start += p->crtc_vtotal; 840 p->crtc_vsync_end += p->crtc_vtotal; 841 p->crtc_vtotal += p->crtc_vtotal; 842 break; 843 } 844 } 845 846 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 847 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 848 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 849 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 850 } 851 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 852 853 /** 854 * drm_mode_copy - copy the mode 855 * @dst: mode to overwrite 856 * @src: mode to copy 857 * 858 * Copy an existing mode into another mode, preserving the object id and 859 * list head of the destination mode. 860 */ 861 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 862 { 863 int id = dst->base.id; 864 struct list_head head = dst->head; 865 866 *dst = *src; 867 dst->base.id = id; 868 dst->head = head; 869 } 870 EXPORT_SYMBOL(drm_mode_copy); 871 872 /** 873 * drm_mode_duplicate - allocate and duplicate an existing mode 874 * @dev: drm_device to allocate the duplicated mode for 875 * @mode: mode to duplicate 876 * 877 * Just allocate a new mode, copy the existing mode into it, and return 878 * a pointer to it. Used to create new instances of established modes. 879 * 880 * Returns: 881 * Pointer to duplicated mode on success, NULL on error. 882 */ 883 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 884 const struct drm_display_mode *mode) 885 { 886 struct drm_display_mode *nmode; 887 888 nmode = drm_mode_create(dev); 889 if (!nmode) 890 return NULL; 891 892 drm_mode_copy(nmode, mode); 893 894 return nmode; 895 } 896 EXPORT_SYMBOL(drm_mode_duplicate); 897 898 /** 899 * drm_mode_equal - test modes for equality 900 * @mode1: first mode 901 * @mode2: second mode 902 * 903 * Check to see if @mode1 and @mode2 are equivalent. 904 * 905 * Returns: 906 * True if the modes are equal, false otherwise. 907 */ 908 bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 909 { 910 if (!mode1 && !mode2) 911 return true; 912 913 if (!mode1 || !mode2) 914 return false; 915 916 /* do clock check convert to PICOS so fb modes get matched 917 * the same */ 918 if (mode1->clock && mode2->clock) { 919 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) 920 return false; 921 } else if (mode1->clock != mode2->clock) 922 return false; 923 924 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) != 925 (mode2->flags & DRM_MODE_FLAG_3D_MASK)) 926 return false; 927 928 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2); 929 } 930 EXPORT_SYMBOL(drm_mode_equal); 931 932 /** 933 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 934 * @mode1: first mode 935 * @mode2: second mode 936 * 937 * Check to see if @mode1 and @mode2 are equivalent, but 938 * don't check the pixel clocks nor the stereo layout. 939 * 940 * Returns: 941 * True if the modes are equal, false otherwise. 942 */ 943 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 944 const struct drm_display_mode *mode2) 945 { 946 if (mode1->hdisplay == mode2->hdisplay && 947 mode1->hsync_start == mode2->hsync_start && 948 mode1->hsync_end == mode2->hsync_end && 949 mode1->htotal == mode2->htotal && 950 mode1->hskew == mode2->hskew && 951 mode1->vdisplay == mode2->vdisplay && 952 mode1->vsync_start == mode2->vsync_start && 953 mode1->vsync_end == mode2->vsync_end && 954 mode1->vtotal == mode2->vtotal && 955 mode1->vscan == mode2->vscan && 956 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 957 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK)) 958 return true; 959 960 return false; 961 } 962 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 963 964 /** 965 * drm_mode_validate_basic - make sure the mode is somewhat sane 966 * @mode: mode to check 967 * 968 * Check that the mode timings are at least somewhat reasonable. 969 * Any hardware specific limits are left up for each driver to check. 970 * 971 * Returns: 972 * The mode status 973 */ 974 enum drm_mode_status 975 drm_mode_validate_basic(const struct drm_display_mode *mode) 976 { 977 if (mode->clock == 0) 978 return MODE_CLOCK_LOW; 979 980 if (mode->hdisplay == 0 || 981 mode->hsync_start < mode->hdisplay || 982 mode->hsync_end < mode->hsync_start || 983 mode->htotal < mode->hsync_end) 984 return MODE_H_ILLEGAL; 985 986 if (mode->vdisplay == 0 || 987 mode->vsync_start < mode->vdisplay || 988 mode->vsync_end < mode->vsync_start || 989 mode->vtotal < mode->vsync_end) 990 return MODE_V_ILLEGAL; 991 992 return MODE_OK; 993 } 994 EXPORT_SYMBOL(drm_mode_validate_basic); 995 996 /** 997 * drm_mode_validate_size - make sure modes adhere to size constraints 998 * @mode: mode to check 999 * @maxX: maximum width 1000 * @maxY: maximum height 1001 * 1002 * This function is a helper which can be used to validate modes against size 1003 * limitations of the DRM device/connector. If a mode is too big its status 1004 * member is updated with the appropriate validation failure code. The list 1005 * itself is not changed. 1006 * 1007 * Returns: 1008 * The mode status 1009 */ 1010 enum drm_mode_status 1011 drm_mode_validate_size(const struct drm_display_mode *mode, 1012 int maxX, int maxY) 1013 { 1014 if (maxX > 0 && mode->hdisplay > maxX) 1015 return MODE_VIRTUAL_X; 1016 1017 if (maxY > 0 && mode->vdisplay > maxY) 1018 return MODE_VIRTUAL_Y; 1019 1020 return MODE_OK; 1021 } 1022 EXPORT_SYMBOL(drm_mode_validate_size); 1023 1024 #ifdef DRMDEBUG 1025 1026 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1027 1028 static const char * const drm_mode_status_names[] = { 1029 MODE_STATUS(OK), 1030 MODE_STATUS(HSYNC), 1031 MODE_STATUS(VSYNC), 1032 MODE_STATUS(H_ILLEGAL), 1033 MODE_STATUS(V_ILLEGAL), 1034 MODE_STATUS(BAD_WIDTH), 1035 MODE_STATUS(NOMODE), 1036 MODE_STATUS(NO_INTERLACE), 1037 MODE_STATUS(NO_DBLESCAN), 1038 MODE_STATUS(NO_VSCAN), 1039 MODE_STATUS(MEM), 1040 MODE_STATUS(VIRTUAL_X), 1041 MODE_STATUS(VIRTUAL_Y), 1042 MODE_STATUS(MEM_VIRT), 1043 MODE_STATUS(NOCLOCK), 1044 MODE_STATUS(CLOCK_HIGH), 1045 MODE_STATUS(CLOCK_LOW), 1046 MODE_STATUS(CLOCK_RANGE), 1047 MODE_STATUS(BAD_HVALUE), 1048 MODE_STATUS(BAD_VVALUE), 1049 MODE_STATUS(BAD_VSCAN), 1050 MODE_STATUS(HSYNC_NARROW), 1051 MODE_STATUS(HSYNC_WIDE), 1052 MODE_STATUS(HBLANK_NARROW), 1053 MODE_STATUS(HBLANK_WIDE), 1054 MODE_STATUS(VSYNC_NARROW), 1055 MODE_STATUS(VSYNC_WIDE), 1056 MODE_STATUS(VBLANK_NARROW), 1057 MODE_STATUS(VBLANK_WIDE), 1058 MODE_STATUS(PANEL), 1059 MODE_STATUS(INTERLACE_WIDTH), 1060 MODE_STATUS(ONE_WIDTH), 1061 MODE_STATUS(ONE_HEIGHT), 1062 MODE_STATUS(ONE_SIZE), 1063 MODE_STATUS(NO_REDUCED), 1064 MODE_STATUS(NO_STEREO), 1065 MODE_STATUS(UNVERIFIED), 1066 MODE_STATUS(BAD), 1067 MODE_STATUS(ERROR), 1068 }; 1069 1070 #undef MODE_STATUS 1071 1072 static const char *drm_get_mode_status_name(enum drm_mode_status status) 1073 { 1074 int index = status + 3; 1075 1076 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1077 return ""; 1078 1079 return drm_mode_status_names[index]; 1080 } 1081 1082 #endif 1083 1084 /** 1085 * drm_mode_prune_invalid - remove invalid modes from mode list 1086 * @dev: DRM device 1087 * @mode_list: list of modes to check 1088 * @verbose: be verbose about it 1089 * 1090 * This helper function can be used to prune a display mode list after 1091 * validation has been completed. All modes who's status is not MODE_OK will be 1092 * removed from the list, and if @verbose the status code and mode name is also 1093 * printed to dmesg. 1094 */ 1095 void drm_mode_prune_invalid(struct drm_device *dev, 1096 struct list_head *mode_list, bool verbose) 1097 { 1098 struct drm_display_mode *mode, *t; 1099 1100 list_for_each_entry_safe(mode, t, mode_list, head) { 1101 if (mode->status != MODE_OK) { 1102 list_del(&mode->head); 1103 if (verbose) { 1104 drm_mode_debug_printmodeline(mode); 1105 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1106 mode->name, 1107 drm_get_mode_status_name(mode->status)); 1108 } 1109 drm_mode_destroy(dev, mode); 1110 } 1111 } 1112 } 1113 EXPORT_SYMBOL(drm_mode_prune_invalid); 1114 1115 /** 1116 * drm_mode_compare - compare modes for favorability 1117 * @priv: unused 1118 * @lh_a: list_head for first mode 1119 * @lh_b: list_head for second mode 1120 * 1121 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1122 * which is better. 1123 * 1124 * Returns: 1125 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1126 * positive if @lh_b is better than @lh_a. 1127 */ 1128 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) 1129 { 1130 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1131 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1132 int diff; 1133 1134 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1135 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1136 if (diff) 1137 return diff; 1138 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1139 if (diff) 1140 return diff; 1141 1142 diff = b->vrefresh - a->vrefresh; 1143 if (diff) 1144 return diff; 1145 1146 diff = b->clock - a->clock; 1147 return diff; 1148 } 1149 1150 /** 1151 * drm_mode_sort - sort mode list 1152 * @mode_list: list of drm_display_mode structures to sort 1153 * 1154 * Sort @mode_list by favorability, moving good modes to the head of the list. 1155 */ 1156 void drm_mode_sort(struct list_head *mode_list) 1157 { 1158 list_sort(NULL, mode_list, drm_mode_compare); 1159 } 1160 EXPORT_SYMBOL(drm_mode_sort); 1161 1162 /** 1163 * drm_mode_connector_list_update - update the mode list for the connector 1164 * @connector: the connector to update 1165 * @merge_type_bits: whether to merge or overwrite type bits 1166 * 1167 * This moves the modes from the @connector probed_modes list 1168 * to the actual mode list. It compares the probed mode against the current 1169 * list and only adds different/new modes. 1170 * 1171 * This is just a helper functions doesn't validate any modes itself and also 1172 * doesn't prune any invalid modes. Callers need to do that themselves. 1173 */ 1174 void drm_mode_connector_list_update(struct drm_connector *connector, 1175 bool merge_type_bits) 1176 { 1177 struct drm_display_mode *mode; 1178 struct drm_display_mode *pmode, *pt; 1179 int found_it; 1180 1181 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1182 1183 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, 1184 head) { 1185 found_it = 0; 1186 /* go through current modes checking for the new probed mode */ 1187 list_for_each_entry(mode, &connector->modes, head) { 1188 if (drm_mode_equal(pmode, mode)) { 1189 found_it = 1; 1190 /* if equal delete the probed mode */ 1191 mode->status = pmode->status; 1192 /* Merge type bits together */ 1193 if (merge_type_bits) 1194 mode->type |= pmode->type; 1195 else 1196 mode->type = pmode->type; 1197 list_del(&pmode->head); 1198 drm_mode_destroy(connector->dev, pmode); 1199 break; 1200 } 1201 } 1202 1203 if (!found_it) { 1204 list_move_tail(&pmode->head, &connector->modes); 1205 } 1206 } 1207 } 1208 EXPORT_SYMBOL(drm_mode_connector_list_update); 1209 1210 /** 1211 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1212 * @mode_option: optional per connector mode option 1213 * @connector: connector to parse modeline for 1214 * @mode: preallocated drm_cmdline_mode structure to fill out 1215 * 1216 * This parses @mode_option command line modeline for modes and options to 1217 * configure the connector. If @mode_option is NULL the default command line 1218 * modeline in fb_mode_option will be parsed instead. 1219 * 1220 * This uses the same parameters as the fb modedb.c, except for an extra 1221 * force-enable, force-enable-digital and force-disable bit at the end: 1222 * 1223 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1224 * 1225 * The intermediate drm_cmdline_mode structure is required to store additional 1226 * options from the command line modline like the force-enable/disable flag. 1227 * 1228 * Returns: 1229 * True if a valid modeline has been parsed, false otherwise. 1230 */ 1231 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1232 struct drm_connector *connector, 1233 struct drm_cmdline_mode *mode) 1234 { 1235 #ifdef __linux__ 1236 const char *name; 1237 unsigned int namelen; 1238 bool res_specified = false, bpp_specified = false, refresh_specified = false; 1239 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; 1240 bool yres_specified = false, cvt = false, rb = false; 1241 bool interlace = false, margins = false, was_digit = false; 1242 int i; 1243 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; 1244 1245 #ifdef CONFIG_FB 1246 if (!mode_option) 1247 mode_option = fb_mode_option; 1248 #endif 1249 1250 if (!mode_option) { 1251 mode->specified = false; 1252 return false; 1253 } 1254 1255 name = mode_option; 1256 namelen = strlen(name); 1257 for (i = namelen-1; i >= 0; i--) { 1258 switch (name[i]) { 1259 case '@': 1260 if (!refresh_specified && !bpp_specified && 1261 !yres_specified && !cvt && !rb && was_digit) { 1262 refresh = simple_strtol(&name[i+1], NULL, 10); 1263 refresh_specified = true; 1264 was_digit = false; 1265 } else 1266 goto done; 1267 break; 1268 case '-': 1269 if (!bpp_specified && !yres_specified && !cvt && 1270 !rb && was_digit) { 1271 bpp = simple_strtol(&name[i+1], NULL, 10); 1272 bpp_specified = true; 1273 was_digit = false; 1274 } else 1275 goto done; 1276 break; 1277 case 'x': 1278 if (!yres_specified && was_digit) { 1279 yres = simple_strtol(&name[i+1], NULL, 10); 1280 yres_specified = true; 1281 was_digit = false; 1282 } else 1283 goto done; 1284 break; 1285 case '0' ... '9': 1286 was_digit = true; 1287 break; 1288 case 'M': 1289 if (yres_specified || cvt || was_digit) 1290 goto done; 1291 cvt = true; 1292 break; 1293 case 'R': 1294 if (yres_specified || cvt || rb || was_digit) 1295 goto done; 1296 rb = true; 1297 break; 1298 case 'm': 1299 if (cvt || yres_specified || was_digit) 1300 goto done; 1301 margins = true; 1302 break; 1303 case 'i': 1304 if (cvt || yres_specified || was_digit) 1305 goto done; 1306 interlace = true; 1307 break; 1308 case 'e': 1309 if (yres_specified || bpp_specified || refresh_specified || 1310 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1311 goto done; 1312 1313 force = DRM_FORCE_ON; 1314 break; 1315 case 'D': 1316 if (yres_specified || bpp_specified || refresh_specified || 1317 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1318 goto done; 1319 1320 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1321 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1322 force = DRM_FORCE_ON; 1323 else 1324 force = DRM_FORCE_ON_DIGITAL; 1325 break; 1326 case 'd': 1327 if (yres_specified || bpp_specified || refresh_specified || 1328 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1329 goto done; 1330 1331 force = DRM_FORCE_OFF; 1332 break; 1333 default: 1334 goto done; 1335 } 1336 } 1337 1338 if (i < 0 && yres_specified) { 1339 char *ch; 1340 xres = simple_strtol(name, &ch, 10); 1341 if ((ch != NULL) && (*ch == 'x')) 1342 res_specified = true; 1343 else 1344 i = ch - name; 1345 } else if (!yres_specified && was_digit) { 1346 /* catch mode that begins with digits but has no 'x' */ 1347 i = 0; 1348 } 1349 done: 1350 if (i >= 0) { 1351 printk(KERN_WARNING 1352 "parse error at position %i in video mode '%s'\n", 1353 i, name); 1354 mode->specified = false; 1355 return false; 1356 } 1357 1358 if (res_specified) { 1359 mode->specified = true; 1360 mode->xres = xres; 1361 mode->yres = yres; 1362 } 1363 1364 if (refresh_specified) { 1365 mode->refresh_specified = true; 1366 mode->refresh = refresh; 1367 } 1368 1369 if (bpp_specified) { 1370 mode->bpp_specified = true; 1371 mode->bpp = bpp; 1372 } 1373 mode->rb = rb; 1374 mode->cvt = cvt; 1375 mode->interlace = interlace; 1376 mode->margins = margins; 1377 mode->force = force; 1378 1379 return true; 1380 #else 1381 return false; 1382 #endif 1383 } 1384 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1385 1386 /** 1387 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1388 * @dev: DRM device to create the new mode for 1389 * @cmd: input command line modeline 1390 * 1391 * Returns: 1392 * Pointer to converted mode on success, NULL on error. 1393 */ 1394 struct drm_display_mode * 1395 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1396 struct drm_cmdline_mode *cmd) 1397 { 1398 struct drm_display_mode *mode; 1399 1400 if (cmd->cvt) 1401 mode = drm_cvt_mode(dev, 1402 cmd->xres, cmd->yres, 1403 cmd->refresh_specified ? cmd->refresh : 60, 1404 cmd->rb, cmd->interlace, 1405 cmd->margins); 1406 else 1407 mode = drm_gtf_mode(dev, 1408 cmd->xres, cmd->yres, 1409 cmd->refresh_specified ? cmd->refresh : 60, 1410 cmd->interlace, 1411 cmd->margins); 1412 if (!mode) 1413 return NULL; 1414 1415 mode->type |= DRM_MODE_TYPE_USERDEF; 1416 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ 1417 if (cmd->xres == 1366 && mode->hdisplay == 1368) { 1418 mode->hdisplay = 1366; 1419 mode->hsync_start--; 1420 mode->hsync_end--; 1421 drm_mode_set_name(mode); 1422 } 1423 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1424 return mode; 1425 } 1426 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1427 1428 /** 1429 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1430 * @out: drm_mode_modeinfo struct to return to the user 1431 * @in: drm_display_mode to use 1432 * 1433 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1434 * the user. 1435 */ 1436 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1437 const struct drm_display_mode *in) 1438 { 1439 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1440 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1441 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1442 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1443 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1444 "timing values too large for mode info\n"); 1445 1446 out->clock = in->clock; 1447 out->hdisplay = in->hdisplay; 1448 out->hsync_start = in->hsync_start; 1449 out->hsync_end = in->hsync_end; 1450 out->htotal = in->htotal; 1451 out->hskew = in->hskew; 1452 out->vdisplay = in->vdisplay; 1453 out->vsync_start = in->vsync_start; 1454 out->vsync_end = in->vsync_end; 1455 out->vtotal = in->vtotal; 1456 out->vscan = in->vscan; 1457 out->vrefresh = in->vrefresh; 1458 out->flags = in->flags; 1459 out->type = in->type; 1460 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1461 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1462 } 1463 1464 /** 1465 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1466 * @out: drm_display_mode to return to the user 1467 * @in: drm_mode_modeinfo to use 1468 * 1469 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1470 * the caller. 1471 * 1472 * Returns: 1473 * Zero on success, negative errno on failure. 1474 */ 1475 int drm_mode_convert_umode(struct drm_display_mode *out, 1476 const struct drm_mode_modeinfo *in) 1477 { 1478 int ret = -EINVAL; 1479 1480 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) { 1481 ret = -ERANGE; 1482 goto out; 1483 } 1484 1485 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1486 goto out; 1487 1488 out->clock = in->clock; 1489 out->hdisplay = in->hdisplay; 1490 out->hsync_start = in->hsync_start; 1491 out->hsync_end = in->hsync_end; 1492 out->htotal = in->htotal; 1493 out->hskew = in->hskew; 1494 out->vdisplay = in->vdisplay; 1495 out->vsync_start = in->vsync_start; 1496 out->vsync_end = in->vsync_end; 1497 out->vtotal = in->vtotal; 1498 out->vscan = in->vscan; 1499 out->vrefresh = in->vrefresh; 1500 out->flags = in->flags; 1501 out->type = in->type; 1502 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1503 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1504 1505 out->status = drm_mode_validate_basic(out); 1506 if (out->status != MODE_OK) 1507 goto out; 1508 1509 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 1510 1511 ret = 0; 1512 1513 out: 1514 return ret; 1515 } 1516