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