1 /* $OpenBSD: drm_modes.c,v 1.7 2016/04/05 08:22:50 kettenis Exp $ */ 2 /* 3 * Copyright © 1997-2003 by The XFree86 Project, Inc. 4 * Copyright © 2007 Dave Airlie 5 * Copyright © 2007-2008 Intel Corporation 6 * Jesse Barnes <jesse.barnes@intel.com> 7 * Copyright 2005-2006 Luc Verhaegen 8 * Copyright (c) 2001, Andy Ritger aritger@nvidia.com 9 * 10 * Permission is hereby granted, free of charge, to any person obtaining a 11 * copy of this software and associated documentation files (the "Software"), 12 * to deal in the Software without restriction, including without limitation 13 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 14 * and/or sell copies of the Software, and to permit persons to whom the 15 * Software is furnished to do so, subject to the following conditions: 16 * 17 * The above copyright notice and this permission notice shall be included in 18 * all copies or substantial portions of the Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 26 * OTHER DEALINGS IN THE SOFTWARE. 27 * 28 * Except as contained in this notice, the name of the copyright holder(s) 29 * and author(s) shall not be used in advertising or otherwise to promote 30 * the sale, use or other dealings in this Software without prior written 31 * authorization from the copyright holder(s) and author(s). 32 */ 33 34 #include "drmP.h" 35 #include "drm_crtc.h" 36 37 #undef RB_ROOT 38 #define RB_ROOT(head) (head)->rbh_root 39 40 long simple_strtol(const char *, char **, int); 41 42 /** 43 * drm_mode_debug_printmodeline - debug print a mode 44 * @dev: DRM device 45 * @mode: mode to print 46 * 47 * LOCKING: 48 * None. 49 * 50 * Describe @mode using DRM_DEBUG. 51 */ 52 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) 53 { 54 DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d " 55 "0x%x 0x%x\n", 56 mode->base.id, mode->name, mode->vrefresh, mode->clock, 57 mode->hdisplay, mode->hsync_start, 58 mode->hsync_end, mode->htotal, 59 mode->vdisplay, mode->vsync_start, 60 mode->vsync_end, mode->vtotal, mode->type, mode->flags); 61 } 62 EXPORT_SYMBOL(drm_mode_debug_printmodeline); 63 64 /** 65 * drm_cvt_mode -create a modeline based on CVT algorithm 66 * @dev: DRM device 67 * @hdisplay: hdisplay size 68 * @vdisplay: vdisplay size 69 * @vrefresh : vrefresh rate 70 * @reduced : Whether the GTF calculation is simplified 71 * @interlaced:Whether the interlace is supported 72 * 73 * LOCKING: 74 * none. 75 * 76 * return the modeline based on CVT algorithm 77 * 78 * This function is called to generate the modeline based on CVT algorithm 79 * according to the hdisplay, vdisplay, vrefresh. 80 * It is based from the VESA(TM) Coordinated Video Timing Generator by 81 * Graham Loveridge April 9, 2003 available at 82 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 83 * 84 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 85 * What I have done is to translate it by using integer calculation. 86 */ 87 #define HV_FACTOR 1000 88 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 89 int vdisplay, int vrefresh, 90 bool reduced, bool interlaced, bool margins) 91 { 92 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 93 #define CVT_MARGIN_PERCENTAGE 18 94 /* 2) character cell horizontal granularity (pixels) - default 8 */ 95 #define CVT_H_GRANULARITY 8 96 /* 3) Minimum vertical porch (lines) - default 3 */ 97 #define CVT_MIN_V_PORCH 3 98 /* 4) Minimum number of vertical back porch lines - default 6 */ 99 #define CVT_MIN_V_BPORCH 6 100 /* Pixel Clock step (kHz) */ 101 #define CVT_CLOCK_STEP 250 102 struct drm_display_mode *drm_mode; 103 unsigned int vfieldrate, hperiod; 104 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 105 int interlace; 106 107 /* allocate the drm_display_mode structure. If failure, we will 108 * return directly 109 */ 110 drm_mode = drm_mode_create(dev); 111 if (!drm_mode) 112 return NULL; 113 114 /* the CVT default refresh rate is 60Hz */ 115 if (!vrefresh) 116 vrefresh = 60; 117 118 /* the required field fresh rate */ 119 if (interlaced) 120 vfieldrate = vrefresh * 2; 121 else 122 vfieldrate = vrefresh; 123 124 /* horizontal pixels */ 125 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 126 127 /* determine the left&right borders */ 128 hmargin = 0; 129 if (margins) { 130 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 131 hmargin -= hmargin % CVT_H_GRANULARITY; 132 } 133 /* find the total active pixels */ 134 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 135 136 /* find the number of lines per field */ 137 if (interlaced) 138 vdisplay_rnd = vdisplay / 2; 139 else 140 vdisplay_rnd = vdisplay; 141 142 /* find the top & bottom borders */ 143 vmargin = 0; 144 if (margins) 145 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 146 147 drm_mode->vdisplay = vdisplay + 2 * vmargin; 148 149 /* Interlaced */ 150 if (interlaced) 151 interlace = 1; 152 else 153 interlace = 0; 154 155 /* Determine VSync Width from aspect ratio */ 156 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 157 vsync = 4; 158 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 159 vsync = 5; 160 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 161 vsync = 6; 162 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 163 vsync = 7; 164 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 165 vsync = 7; 166 else /* custom */ 167 vsync = 10; 168 169 if (!reduced) { 170 /* simplify the GTF calculation */ 171 /* 4) Minimum time of vertical sync + back porch interval (µs) 172 * default 550.0 173 */ 174 int tmp1, tmp2; 175 #define CVT_MIN_VSYNC_BP 550 176 /* 3) Nominal HSync width (% of line period) - default 8 */ 177 #define CVT_HSYNC_PERCENTAGE 8 178 unsigned int hblank_percentage; 179 int vsyncandback_porch, vback_porch, hblank; 180 181 /* estimated the horizontal period */ 182 tmp1 = HV_FACTOR * 1000000 - 183 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 184 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 185 interlace; 186 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 187 188 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 189 /* 9. Find number of lines in sync + backporch */ 190 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 191 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 192 else 193 vsyncandback_porch = tmp1; 194 /* 10. Find number of lines in back porch */ 195 vback_porch = vsyncandback_porch - vsync; 196 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 197 vsyncandback_porch + CVT_MIN_V_PORCH; 198 /* 5) Definition of Horizontal blanking time limitation */ 199 /* Gradient (%/kHz) - default 600 */ 200 #define CVT_M_FACTOR 600 201 /* Offset (%) - default 40 */ 202 #define CVT_C_FACTOR 40 203 /* Blanking time scaling factor - default 128 */ 204 #define CVT_K_FACTOR 128 205 /* Scaling factor weighting - default 20 */ 206 #define CVT_J_FACTOR 20 207 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 208 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 209 CVT_J_FACTOR) 210 /* 12. Find ideal blanking duty cycle from formula */ 211 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 212 hperiod / 1000; 213 /* 13. Blanking time */ 214 if (hblank_percentage < 20 * HV_FACTOR) 215 hblank_percentage = 20 * HV_FACTOR; 216 hblank = drm_mode->hdisplay * hblank_percentage / 217 (100 * HV_FACTOR - hblank_percentage); 218 hblank -= hblank % (2 * CVT_H_GRANULARITY); 219 /* 14. find the total pixes per line */ 220 drm_mode->htotal = drm_mode->hdisplay + hblank; 221 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 222 drm_mode->hsync_start = drm_mode->hsync_end - 223 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 224 drm_mode->hsync_start += CVT_H_GRANULARITY - 225 drm_mode->hsync_start % CVT_H_GRANULARITY; 226 /* fill the Vsync values */ 227 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 228 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 229 } else { 230 /* Reduced blanking */ 231 /* Minimum vertical blanking interval time (µs)- default 460 */ 232 #define CVT_RB_MIN_VBLANK 460 233 /* Fixed number of clocks for horizontal sync */ 234 #define CVT_RB_H_SYNC 32 235 /* Fixed number of clocks for horizontal blanking */ 236 #define CVT_RB_H_BLANK 160 237 /* Fixed number of lines for vertical front porch - default 3*/ 238 #define CVT_RB_VFPORCH 3 239 int vbilines; 240 int tmp1, tmp2; 241 /* 8. Estimate Horizontal period. */ 242 tmp1 = HV_FACTOR * 1000000 - 243 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 244 tmp2 = vdisplay_rnd + 2 * vmargin; 245 hperiod = tmp1 / (tmp2 * vfieldrate); 246 /* 9. Find number of lines in vertical blanking */ 247 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 248 /* 10. Check if vertical blanking is sufficient */ 249 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 250 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 251 /* 11. Find total number of lines in vertical field */ 252 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 253 /* 12. Find total number of pixels in a line */ 254 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 255 /* Fill in HSync values */ 256 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 257 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 258 /* Fill in VSync values */ 259 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 260 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 261 } 262 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 263 drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod; 264 drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP; 265 /* 18/16. Find actual vertical frame frequency */ 266 /* ignore - just set the mode flag for interlaced */ 267 if (interlaced) { 268 drm_mode->vtotal *= 2; 269 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 270 } 271 /* Fill the mode line name */ 272 drm_mode_set_name(drm_mode); 273 if (reduced) 274 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 275 DRM_MODE_FLAG_NVSYNC); 276 else 277 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 278 DRM_MODE_FLAG_NHSYNC); 279 280 return drm_mode; 281 } 282 EXPORT_SYMBOL(drm_cvt_mode); 283 284 /** 285 * drm_gtf_mode_complex - create the modeline based on full GTF algorithm 286 * 287 * @dev :drm device 288 * @hdisplay :hdisplay size 289 * @vdisplay :vdisplay size 290 * @vrefresh :vrefresh rate. 291 * @interlaced :whether the interlace is supported 292 * @margins :desired margin size 293 * @GTF_[MCKJ] :extended GTF formula parameters 294 * 295 * LOCKING. 296 * none. 297 * 298 * return the modeline based on full GTF algorithm. 299 * 300 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 301 * in here multiplied by two. For a C of 40, pass in 80. 302 */ 303 struct drm_display_mode * 304 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 305 int vrefresh, bool interlaced, int margins, 306 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 307 { /* 1) top/bottom margin size (% of height) - default: 1.8, */ 308 #define GTF_MARGIN_PERCENTAGE 18 309 /* 2) character cell horizontal granularity (pixels) - default 8 */ 310 #define GTF_CELL_GRAN 8 311 /* 3) Minimum vertical porch (lines) - default 3 */ 312 #define GTF_MIN_V_PORCH 1 313 /* width of vsync in lines */ 314 #define V_SYNC_RQD 3 315 /* width of hsync as % of total line */ 316 #define H_SYNC_PERCENT 8 317 /* min time of vsync + back porch (microsec) */ 318 #define MIN_VSYNC_PLUS_BP 550 319 /* C' and M' are part of the Blanking Duty Cycle computation */ 320 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 321 #define GTF_M_PRIME (GTF_K * GTF_M / 256) 322 struct drm_display_mode *drm_mode; 323 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 324 int top_margin, bottom_margin; 325 int interlace; 326 unsigned int hfreq_est; 327 int vsync_plus_bp, vback_porch; 328 unsigned int vtotal_lines, vfieldrate_est, hperiod; 329 unsigned int vfield_rate, vframe_rate; 330 int left_margin, right_margin; 331 unsigned int total_active_pixels, ideal_duty_cycle; 332 unsigned int hblank, total_pixels, pixel_freq; 333 int hsync, hfront_porch, vodd_front_porch_lines; 334 unsigned int tmp1, tmp2; 335 336 drm_mode = drm_mode_create(dev); 337 if (!drm_mode) 338 return NULL; 339 340 /* 1. In order to give correct results, the number of horizontal 341 * pixels requested is first processed to ensure that it is divisible 342 * by the character size, by rounding it to the nearest character 343 * cell boundary: 344 */ 345 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 346 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 347 348 /* 2. If interlace is requested, the number of vertical lines assumed 349 * by the calculation must be halved, as the computation calculates 350 * the number of vertical lines per field. 351 */ 352 if (interlaced) 353 vdisplay_rnd = vdisplay / 2; 354 else 355 vdisplay_rnd = vdisplay; 356 357 /* 3. Find the frame rate required: */ 358 if (interlaced) 359 vfieldrate_rqd = vrefresh * 2; 360 else 361 vfieldrate_rqd = vrefresh; 362 363 /* 4. Find number of lines in Top margin: */ 364 top_margin = 0; 365 if (margins) 366 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 367 1000; 368 /* 5. Find number of lines in bottom margin: */ 369 bottom_margin = top_margin; 370 371 /* 6. If interlace is required, then set variable interlace: */ 372 if (interlaced) 373 interlace = 1; 374 else 375 interlace = 0; 376 377 /* 7. Estimate the Horizontal frequency */ 378 { 379 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 380 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 381 2 + interlace; 382 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 383 } 384 385 /* 8. Find the number of lines in V sync + back porch */ 386 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 387 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 388 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 389 /* 9. Find the number of lines in V back porch alone: */ 390 vback_porch = vsync_plus_bp - V_SYNC_RQD; 391 /* 10. Find the total number of lines in Vertical field period: */ 392 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 393 vsync_plus_bp + GTF_MIN_V_PORCH; 394 /* 11. Estimate the Vertical field frequency: */ 395 vfieldrate_est = hfreq_est / vtotal_lines; 396 /* 12. Find the actual horizontal period: */ 397 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 398 399 /* 13. Find the actual Vertical field frequency: */ 400 vfield_rate = hfreq_est / vtotal_lines; 401 /* 14. Find the Vertical frame frequency: */ 402 if (interlaced) 403 vframe_rate = vfield_rate / 2; 404 else 405 vframe_rate = vfield_rate; 406 /* 15. Find number of pixels in left margin: */ 407 if (margins) 408 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 409 1000; 410 else 411 left_margin = 0; 412 413 /* 16.Find number of pixels in right margin: */ 414 right_margin = left_margin; 415 /* 17.Find total number of active pixels in image and left and right */ 416 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 417 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 418 ideal_duty_cycle = GTF_C_PRIME * 1000 - 419 (GTF_M_PRIME * 1000000 / hfreq_est); 420 /* 19.Find the number of pixels in the blanking time to the nearest 421 * double character cell: */ 422 hblank = total_active_pixels * ideal_duty_cycle / 423 (100000 - ideal_duty_cycle); 424 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 425 hblank = hblank * 2 * GTF_CELL_GRAN; 426 /* 20.Find total number of pixels: */ 427 total_pixels = total_active_pixels + hblank; 428 /* 21.Find pixel clock frequency: */ 429 pixel_freq = total_pixels * hfreq_est / 1000; 430 /* Stage 1 computations are now complete; I should really pass 431 * the results to another function and do the Stage 2 computations, 432 * but I only need a few more values so I'll just append the 433 * computations here for now */ 434 /* 17. Find the number of pixels in the horizontal sync period: */ 435 hsync = H_SYNC_PERCENT * total_pixels / 100; 436 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 437 hsync = hsync * GTF_CELL_GRAN; 438 /* 18. Find the number of pixels in horizontal front porch period */ 439 hfront_porch = hblank / 2 - hsync; 440 /* 36. Find the number of lines in the odd front porch period: */ 441 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 442 443 /* finally, pack the results in the mode struct */ 444 drm_mode->hdisplay = hdisplay_rnd; 445 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 446 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 447 drm_mode->htotal = total_pixels; 448 drm_mode->vdisplay = vdisplay_rnd; 449 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 450 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 451 drm_mode->vtotal = vtotal_lines; 452 453 drm_mode->clock = pixel_freq; 454 455 if (interlaced) { 456 drm_mode->vtotal *= 2; 457 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 458 } 459 460 drm_mode_set_name(drm_mode); 461 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 462 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 463 else 464 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 465 466 return drm_mode; 467 } 468 EXPORT_SYMBOL(drm_gtf_mode_complex); 469 470 /** 471 * drm_gtf_mode - create the modeline based on GTF algorithm 472 * 473 * @dev :drm device 474 * @hdisplay :hdisplay size 475 * @vdisplay :vdisplay size 476 * @vrefresh :vrefresh rate. 477 * @interlaced :whether the interlace is supported 478 * @margins :whether the margin is supported 479 * 480 * LOCKING. 481 * none. 482 * 483 * return the modeline based on GTF algorithm 484 * 485 * This function is to create the modeline based on the GTF algorithm. 486 * Generalized Timing Formula is derived from: 487 * GTF Spreadsheet by Andy Morrish (1/5/97) 488 * available at http://www.vesa.org 489 * 490 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 491 * What I have done is to translate it by using integer calculation. 492 * I also refer to the function of fb_get_mode in the file of 493 * drivers/video/fbmon.c 494 * 495 * Standard GTF parameters: 496 * M = 600 497 * C = 40 498 * K = 128 499 * J = 20 500 */ 501 struct drm_display_mode * 502 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 503 bool lace, int margins) 504 { 505 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, lace, 506 margins, 600, 40 * 2, 128, 20 * 2); 507 } 508 EXPORT_SYMBOL(drm_gtf_mode); 509 510 #ifdef CONFIG_VIDEOMODE_HELPERS 511 int drm_display_mode_from_videomode(const struct videomode *vm, 512 struct drm_display_mode *dmode) 513 { 514 dmode->hdisplay = vm->hactive; 515 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 516 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 517 dmode->htotal = dmode->hsync_end + vm->hback_porch; 518 519 dmode->vdisplay = vm->vactive; 520 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 521 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 522 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 523 524 dmode->clock = vm->pixelclock / 1000; 525 526 dmode->flags = 0; 527 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 528 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 529 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 530 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 531 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 532 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 533 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 534 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 535 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 536 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 537 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 538 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 539 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 540 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 541 drm_mode_set_name(dmode); 542 543 return 0; 544 } 545 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 546 547 #ifdef CONFIG_OF 548 /** 549 * of_get_drm_display_mode - get a drm_display_mode from devicetree 550 * @np: device_node with the timing specification 551 * @dmode: will be set to the return value 552 * @index: index into the list of display timings in devicetree 553 * 554 * This function is expensive and should only be used, if only one mode is to be 555 * read from DT. To get multiple modes start with of_get_display_timings and 556 * work with that instead. 557 */ 558 int of_get_drm_display_mode(struct device_node *np, 559 struct drm_display_mode *dmode, int index) 560 { 561 struct videomode vm; 562 int ret; 563 564 ret = of_get_videomode(np, &vm, index); 565 if (ret) 566 return ret; 567 568 drm_display_mode_from_videomode(&vm, dmode); 569 570 pr_debug("%s: got %dx%d display mode from %s\n", 571 of_node_full_name(np), vm.hactive, vm.vactive, np->name); 572 drm_mode_debug_printmodeline(dmode); 573 574 return 0; 575 } 576 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 577 #endif /* CONFIG_OF */ 578 #endif /* CONFIG_VIDEOMODE_HELPERS */ 579 580 /** 581 * drm_mode_set_name - set the name on a mode 582 * @mode: name will be set in this mode 583 * 584 * LOCKING: 585 * None. 586 * 587 * Set the name of @mode to a standard format. 588 */ 589 void drm_mode_set_name(struct drm_display_mode *mode) 590 { 591 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 592 593 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 594 mode->hdisplay, mode->vdisplay, 595 interlaced ? "i" : ""); 596 } 597 EXPORT_SYMBOL(drm_mode_set_name); 598 599 /** 600 * drm_mode_width - get the width of a mode 601 * @mode: mode 602 * 603 * LOCKING: 604 * None. 605 * 606 * Return @mode's width (hdisplay) value. 607 * 608 * FIXME: is this needed? 609 * 610 * RETURNS: 611 * @mode->hdisplay 612 */ 613 int drm_mode_width(const struct drm_display_mode *mode) 614 { 615 return mode->hdisplay; 616 617 } 618 EXPORT_SYMBOL(drm_mode_width); 619 620 /** 621 * drm_mode_height - get the height of a mode 622 * @mode: mode 623 * 624 * LOCKING: 625 * None. 626 * 627 * Return @mode's height (vdisplay) value. 628 * 629 * FIXME: is this needed? 630 * 631 * RETURNS: 632 * @mode->vdisplay 633 */ 634 int drm_mode_height(const struct drm_display_mode *mode) 635 { 636 return mode->vdisplay; 637 } 638 EXPORT_SYMBOL(drm_mode_height); 639 640 /** drm_mode_hsync - get the hsync of a mode 641 * @mode: mode 642 * 643 * LOCKING: 644 * None. 645 * 646 * Return @modes's hsync rate in kHz, rounded to the nearest int. 647 */ 648 int drm_mode_hsync(const struct drm_display_mode *mode) 649 { 650 unsigned int calc_val; 651 652 if (mode->hsync) 653 return mode->hsync; 654 655 if (mode->htotal < 0) 656 return 0; 657 658 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ 659 calc_val += 500; /* round to 1000Hz */ 660 calc_val /= 1000; /* truncate to kHz */ 661 662 return calc_val; 663 } 664 EXPORT_SYMBOL(drm_mode_hsync); 665 666 /** 667 * drm_mode_vrefresh - get the vrefresh of a mode 668 * @mode: mode 669 * 670 * LOCKING: 671 * None. 672 * 673 * Return @mode's vrefresh rate in Hz or calculate it if necessary. 674 * 675 * FIXME: why is this needed? shouldn't vrefresh be set already? 676 * 677 * RETURNS: 678 * Vertical refresh rate. It will be the result of actual value plus 0.5. 679 * If it is 70.288, it will return 70Hz. 680 * If it is 59.6, it will return 60Hz. 681 */ 682 int drm_mode_vrefresh(const struct drm_display_mode *mode) 683 { 684 int refresh = 0; 685 unsigned int calc_val; 686 687 if (mode->vrefresh > 0) 688 refresh = mode->vrefresh; 689 else if (mode->htotal > 0 && mode->vtotal > 0) { 690 int vtotal; 691 vtotal = mode->vtotal; 692 /* work out vrefresh the value will be x1000 */ 693 calc_val = (mode->clock * 1000); 694 calc_val /= mode->htotal; 695 refresh = (calc_val + vtotal / 2) / vtotal; 696 697 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 698 refresh *= 2; 699 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 700 refresh /= 2; 701 if (mode->vscan > 1) 702 refresh /= mode->vscan; 703 } 704 return refresh; 705 } 706 EXPORT_SYMBOL(drm_mode_vrefresh); 707 708 /** 709 * drm_mode_set_crtcinfo - set CRTC modesetting parameters 710 * @p: mode 711 * @adjust_flags: a combination of adjustment flags 712 * 713 * LOCKING: 714 * None. 715 * 716 * Setup the CRTC modesetting parameters for @p, adjusting if necessary. 717 * 718 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 719 * interlaced modes. 720 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 721 * buffers containing two eyes (only adjust the timings when needed, eg. for 722 * "frame packing" or "side by side full"). 723 */ 724 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 725 { 726 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) 727 return; 728 729 p->crtc_clock = p->clock; 730 p->crtc_hdisplay = p->hdisplay; 731 p->crtc_hsync_start = p->hsync_start; 732 p->crtc_hsync_end = p->hsync_end; 733 p->crtc_htotal = p->htotal; 734 p->crtc_hskew = p->hskew; 735 p->crtc_vdisplay = p->vdisplay; 736 p->crtc_vsync_start = p->vsync_start; 737 p->crtc_vsync_end = p->vsync_end; 738 p->crtc_vtotal = p->vtotal; 739 740 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 741 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 742 p->crtc_vdisplay /= 2; 743 p->crtc_vsync_start /= 2; 744 p->crtc_vsync_end /= 2; 745 p->crtc_vtotal /= 2; 746 } 747 } 748 749 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 750 p->crtc_vdisplay *= 2; 751 p->crtc_vsync_start *= 2; 752 p->crtc_vsync_end *= 2; 753 p->crtc_vtotal *= 2; 754 } 755 756 if (p->vscan > 1) { 757 p->crtc_vdisplay *= p->vscan; 758 p->crtc_vsync_start *= p->vscan; 759 p->crtc_vsync_end *= p->vscan; 760 p->crtc_vtotal *= p->vscan; 761 } 762 763 if (adjust_flags & CRTC_STEREO_DOUBLE) { 764 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 765 766 switch (layout) { 767 case DRM_MODE_FLAG_3D_FRAME_PACKING: 768 p->crtc_clock *= 2; 769 p->crtc_vdisplay += p->crtc_vtotal; 770 p->crtc_vsync_start += p->crtc_vtotal; 771 p->crtc_vsync_end += p->crtc_vtotal; 772 p->crtc_vtotal += p->crtc_vtotal; 773 break; 774 } 775 } 776 777 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 778 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 779 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 780 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 781 } 782 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 783 784 785 /** 786 * drm_mode_copy - copy the mode 787 * @dst: mode to overwrite 788 * @src: mode to copy 789 * 790 * LOCKING: 791 * None. 792 * 793 * Copy an existing mode into another mode, preserving the object id and 794 * list head of the destination mode. 795 */ 796 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 797 { 798 int id = dst->base.id; 799 struct list_head head = dst->head; 800 801 *dst = *src; 802 dst->base.id = id; 803 dst->head = head; 804 } 805 EXPORT_SYMBOL(drm_mode_copy); 806 807 /** 808 * drm_mode_duplicate - allocate and duplicate an existing mode 809 * @m: mode to duplicate 810 * 811 * LOCKING: 812 * None. 813 * 814 * Just allocate a new mode, copy the existing mode into it, and return 815 * a pointer to it. Used to create new instances of established modes. 816 */ 817 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 818 const struct drm_display_mode *mode) 819 { 820 struct drm_display_mode *nmode; 821 822 nmode = drm_mode_create(dev); 823 if (!nmode) 824 return NULL; 825 826 drm_mode_copy(nmode, mode); 827 828 return nmode; 829 } 830 EXPORT_SYMBOL(drm_mode_duplicate); 831 832 /** 833 * drm_mode_equal - test modes for equality 834 * @mode1: first mode 835 * @mode2: second mode 836 * 837 * LOCKING: 838 * None. 839 * 840 * Check to see if @mode1 and @mode2 are equivalent. 841 * 842 * RETURNS: 843 * True if the modes are equal, false otherwise. 844 */ 845 bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 846 { 847 /* do clock check convert to PICOS so fb modes get matched 848 * the same */ 849 if (mode1->clock && mode2->clock) { 850 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) 851 return false; 852 } else if (mode1->clock != mode2->clock) 853 return false; 854 855 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) != 856 (mode2->flags & DRM_MODE_FLAG_3D_MASK)) 857 return false; 858 859 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2); 860 } 861 EXPORT_SYMBOL(drm_mode_equal); 862 863 /** 864 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 865 * @mode1: first mode 866 * @mode2: second mode 867 * 868 * LOCKING: 869 * None. 870 * 871 * Check to see if @mode1 and @mode2 are equivalent, but 872 * don't check the pixel clocks nor the stereo layout. 873 * 874 * RETURNS: 875 * True if the modes are equal, false otherwise. 876 */ 877 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 878 const struct drm_display_mode *mode2) 879 { 880 if (mode1->hdisplay == mode2->hdisplay && 881 mode1->hsync_start == mode2->hsync_start && 882 mode1->hsync_end == mode2->hsync_end && 883 mode1->htotal == mode2->htotal && 884 mode1->hskew == mode2->hskew && 885 mode1->vdisplay == mode2->vdisplay && 886 mode1->vsync_start == mode2->vsync_start && 887 mode1->vsync_end == mode2->vsync_end && 888 mode1->vtotal == mode2->vtotal && 889 mode1->vscan == mode2->vscan && 890 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 891 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK)) 892 return true; 893 894 return false; 895 } 896 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 897 898 /** 899 * drm_mode_validate_size - make sure modes adhere to size constraints 900 * @dev: DRM device 901 * @mode_list: list of modes to check 902 * @maxX: maximum width 903 * @maxY: maximum height 904 * @maxPitch: max pitch 905 * 906 * LOCKING: 907 * Caller must hold a lock protecting @mode_list. 908 * 909 * The DRM device (@dev) has size and pitch limits. Here we validate the 910 * modes we probed for @dev against those limits and set their status as 911 * necessary. 912 */ 913 void drm_mode_validate_size(struct drm_device *dev, 914 struct list_head *mode_list, 915 int maxX, int maxY, int maxPitch) 916 { 917 struct drm_display_mode *mode; 918 919 list_for_each_entry(mode, mode_list, head) { 920 if (maxPitch > 0 && mode->hdisplay > maxPitch) 921 mode->status = MODE_BAD_WIDTH; 922 923 if (maxX > 0 && mode->hdisplay > maxX) 924 mode->status = MODE_VIRTUAL_X; 925 926 if (maxY > 0 && mode->vdisplay > maxY) 927 mode->status = MODE_VIRTUAL_Y; 928 } 929 } 930 EXPORT_SYMBOL(drm_mode_validate_size); 931 932 /** 933 * drm_mode_prune_invalid - remove invalid modes from mode list 934 * @dev: DRM device 935 * @mode_list: list of modes to check 936 * @verbose: be verbose about it 937 * 938 * LOCKING: 939 * Caller must hold a lock protecting @mode_list. 940 * 941 * Once mode list generation is complete, a caller can use this routine to 942 * remove invalid modes from a mode list. If any of the modes have a 943 * status other than %MODE_OK, they are removed from @mode_list and freed. 944 */ 945 void drm_mode_prune_invalid(struct drm_device *dev, 946 struct list_head *mode_list, bool verbose) 947 { 948 struct drm_display_mode *mode, *t; 949 950 list_for_each_entry_safe(mode, t, mode_list, head) { 951 if (mode->status != MODE_OK) { 952 list_del(&mode->head); 953 if (verbose) { 954 drm_mode_debug_printmodeline(mode); 955 DRM_DEBUG_KMS("Not using %s mode %d\n", 956 mode->name, mode->status); 957 } 958 drm_mode_destroy(dev, mode); 959 } 960 } 961 } 962 EXPORT_SYMBOL(drm_mode_prune_invalid); 963 964 /** 965 * drm_mode_compare - compare modes for favorability 966 * @priv: unused 967 * @lh_a: list_head for first mode 968 * @lh_b: list_head for second mode 969 * 970 * LOCKING: 971 * None. 972 * 973 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 974 * which is better. 975 * 976 * RETURNS: 977 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 978 * positive if @lh_b is better than @lh_a. 979 */ 980 static int drm_mode_compare(struct drm_display_mode *a, struct drm_display_mode* b) 981 { 982 int diff; 983 984 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 985 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 986 if (diff) 987 return diff; 988 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 989 if (diff) 990 return diff; 991 992 diff = b->vrefresh - a->vrefresh; 993 if (diff) 994 return diff; 995 996 diff = b->clock - a->clock; 997 return diff; 998 } 999 1000 /** 1001 * drm_mode_sort - sort mode list 1002 * @mode_list: list to sort 1003 * 1004 * LOCKING: 1005 * Caller must hold a lock protecting @mode_list. 1006 * 1007 * Sort @mode_list by favorability, putting good modes first. 1008 */ 1009 RB_HEAD(drm_mode_sort, drm_display_mode); 1010 1011 RB_PROTOTYPE(drm_mode_sort, drm_display_mode, sort, drm_mode_compare); 1012 1013 void drm_mode_sort(struct list_head *mode_list) 1014 { 1015 struct drm_display_mode *mode, *t; 1016 struct drm_mode_sort drm_mode_tree; 1017 1018 RB_INIT(&drm_mode_tree); 1019 list_for_each_entry_safe(mode, t, mode_list, head) { 1020 RB_INSERT(drm_mode_sort, &drm_mode_tree, mode); 1021 list_del(&mode->head); 1022 } 1023 RB_FOREACH(mode, drm_mode_sort, &drm_mode_tree) 1024 list_add_tail(&mode->head, mode_list); 1025 } 1026 EXPORT_SYMBOL(drm_mode_sort); 1027 1028 RB_GENERATE(drm_mode_sort, drm_display_mode, sort, drm_mode_compare); 1029 1030 /** 1031 * drm_mode_connector_list_update - update the mode list for the connector 1032 * @connector: the connector to update 1033 * 1034 * LOCKING: 1035 * Caller must hold a lock protecting @mode_list. 1036 * 1037 * This moves the modes from the @connector probed_modes list 1038 * to the actual mode list. It compares the probed mode against the current 1039 * list and only adds different modes. All modes unverified after this point 1040 * will be removed by the prune invalid modes. 1041 */ 1042 void drm_mode_connector_list_update(struct drm_connector *connector) 1043 { 1044 struct drm_display_mode *mode; 1045 struct drm_display_mode *pmode, *pt; 1046 int found_it; 1047 1048 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, 1049 head) { 1050 found_it = 0; 1051 /* go through current modes checking for the new probed mode */ 1052 list_for_each_entry(mode, &connector->modes, head) { 1053 if (drm_mode_equal(pmode, mode)) { 1054 found_it = 1; 1055 /* if equal delete the probed mode */ 1056 mode->status = pmode->status; 1057 /* Merge type bits together */ 1058 mode->type |= pmode->type; 1059 list_del(&pmode->head); 1060 drm_mode_destroy(connector->dev, pmode); 1061 break; 1062 } 1063 } 1064 1065 if (!found_it) { 1066 list_move_tail(&pmode->head, &connector->modes); 1067 } 1068 } 1069 } 1070 EXPORT_SYMBOL(drm_mode_connector_list_update); 1071 1072 /** 1073 * drm_mode_parse_command_line_for_connector - parse command line for connector 1074 * @mode_option - per connector mode option 1075 * @connector - connector to parse line for 1076 * 1077 * This parses the connector specific then generic command lines for 1078 * modes and options to configure the connector. 1079 * 1080 * This uses the same parameters as the fb modedb.c, except for extra 1081 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1082 * 1083 * enable/enable Digital/disable bit at the end 1084 */ 1085 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1086 struct drm_connector *connector, 1087 struct drm_cmdline_mode *mode) 1088 { 1089 const char *name; 1090 unsigned int namelen; 1091 bool res_specified = false, bpp_specified = false, refresh_specified = false; 1092 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; 1093 bool yres_specified = false, cvt = false, rb = false; 1094 bool interlace = false, margins = false, was_digit = false; 1095 int i; 1096 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; 1097 1098 #ifdef CONFIG_FB 1099 if (!mode_option) 1100 mode_option = fb_mode_option; 1101 #endif 1102 1103 if (!mode_option) { 1104 mode->specified = false; 1105 return false; 1106 } 1107 1108 name = mode_option; 1109 namelen = strlen(name); 1110 for (i = namelen-1; i >= 0; i--) { 1111 switch (name[i]) { 1112 case '@': 1113 if (!refresh_specified && !bpp_specified && 1114 !yres_specified && !cvt && !rb && was_digit) { 1115 refresh = simple_strtol(&name[i+1], NULL, 10); 1116 refresh_specified = true; 1117 was_digit = false; 1118 } else 1119 goto done; 1120 break; 1121 case '-': 1122 if (!bpp_specified && !yres_specified && !cvt && 1123 !rb && was_digit) { 1124 bpp = simple_strtol(&name[i+1], NULL, 10); 1125 bpp_specified = true; 1126 was_digit = false; 1127 } else 1128 goto done; 1129 break; 1130 case 'x': 1131 if (!yres_specified && was_digit) { 1132 yres = simple_strtol(&name[i+1], NULL, 10); 1133 yres_specified = true; 1134 was_digit = false; 1135 } else 1136 goto done; 1137 break; 1138 case '0' ... '9': 1139 was_digit = true; 1140 break; 1141 case 'M': 1142 if (yres_specified || cvt || was_digit) 1143 goto done; 1144 cvt = true; 1145 break; 1146 case 'R': 1147 if (yres_specified || cvt || rb || was_digit) 1148 goto done; 1149 rb = true; 1150 break; 1151 case 'm': 1152 if (cvt || yres_specified || was_digit) 1153 goto done; 1154 margins = true; 1155 break; 1156 case 'i': 1157 if (cvt || yres_specified || was_digit) 1158 goto done; 1159 interlace = true; 1160 break; 1161 case 'e': 1162 if (yres_specified || bpp_specified || refresh_specified || 1163 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1164 goto done; 1165 1166 force = DRM_FORCE_ON; 1167 break; 1168 case 'D': 1169 if (yres_specified || bpp_specified || refresh_specified || 1170 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1171 goto done; 1172 1173 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1174 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1175 force = DRM_FORCE_ON; 1176 else 1177 force = DRM_FORCE_ON_DIGITAL; 1178 break; 1179 case 'd': 1180 if (yres_specified || bpp_specified || refresh_specified || 1181 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1182 goto done; 1183 1184 force = DRM_FORCE_OFF; 1185 break; 1186 default: 1187 goto done; 1188 } 1189 } 1190 1191 if (i < 0 && yres_specified) { 1192 char *ch; 1193 xres = simple_strtol(name, &ch, 10); 1194 if ((ch != NULL) && (*ch == 'x')) 1195 res_specified = true; 1196 else 1197 i = ch - name; 1198 } else if (!yres_specified && was_digit) { 1199 /* catch mode that begins with digits but has no 'x' */ 1200 i = 0; 1201 } 1202 done: 1203 if (i >= 0) { 1204 printk(KERN_WARNING 1205 "parse error at position %i in video mode '%s'\n", 1206 i, name); 1207 mode->specified = false; 1208 return false; 1209 } 1210 1211 if (res_specified) { 1212 mode->specified = true; 1213 mode->xres = xres; 1214 mode->yres = yres; 1215 } 1216 1217 if (refresh_specified) { 1218 mode->refresh_specified = true; 1219 mode->refresh = refresh; 1220 } 1221 1222 if (bpp_specified) { 1223 mode->bpp_specified = true; 1224 mode->bpp = bpp; 1225 } 1226 mode->rb = rb; 1227 mode->cvt = cvt; 1228 mode->interlace = interlace; 1229 mode->margins = margins; 1230 mode->force = force; 1231 1232 return true; 1233 } 1234 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1235 1236 struct drm_display_mode * 1237 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1238 struct drm_cmdline_mode *cmd) 1239 { 1240 struct drm_display_mode *mode; 1241 1242 if (cmd->cvt) 1243 mode = drm_cvt_mode(dev, 1244 cmd->xres, cmd->yres, 1245 cmd->refresh_specified ? cmd->refresh : 60, 1246 cmd->rb, cmd->interlace, 1247 cmd->margins); 1248 else 1249 mode = drm_gtf_mode(dev, 1250 cmd->xres, cmd->yres, 1251 cmd->refresh_specified ? cmd->refresh : 60, 1252 cmd->interlace, 1253 cmd->margins); 1254 if (!mode) 1255 return NULL; 1256 1257 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1258 return mode; 1259 } 1260 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1261 1262 /*- 1263 * Copyright (c) 1990 The Regents of the University of California. 1264 * All rights reserved. 1265 * 1266 * Redistribution and use in source and binary forms, with or without 1267 * modification, are permitted provided that the following conditions 1268 * are met: 1269 * 1. Redistributions of source code must retain the above copyright 1270 * notice, this list of conditions and the following disclaimer. 1271 * 2. Redistributions in binary form must reproduce the above copyright 1272 * notice, this list of conditions and the following disclaimer in the 1273 * documentation and/or other materials provided with the distribution. 1274 * 3. Neither the name of the University nor the names of its contributors 1275 * may be used to endorse or promote products derived from this software 1276 * without specific prior written permission. 1277 * 1278 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1279 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1280 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1281 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 1282 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1283 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 1284 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 1285 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 1286 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 1287 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 1288 * SUCH DAMAGE. 1289 */ 1290 1291 1292 /* 1293 * Convert a string to a long integer. 1294 * 1295 * Ignores `locale' stuff. Assumes that the upper and lower case 1296 * alphabets and digits are each contiguous. 1297 */ 1298 #include <sys/limits.h> 1299 1300 long 1301 simple_strtol(const char *nptr, char **endptr, int base) 1302 { 1303 const char *s; 1304 long acc, cutoff; 1305 int c; 1306 int neg, any, cutlim; 1307 int errno; 1308 1309 /* 1310 * Skip white space and pick up leading +/- sign if any. 1311 * If base is 0, allow 0x for hex and 0 for octal, else 1312 * assume decimal; if base is already 16, allow 0x. 1313 */ 1314 s = nptr; 1315 do { 1316 c = (unsigned char) *s++; 1317 } while (c == ' ' || c == '\t'); 1318 if (c == '-') { 1319 neg = 1; 1320 c = *s++; 1321 } else { 1322 neg = 0; 1323 if (c == '+') 1324 c = *s++; 1325 } 1326 if ((base == 0 || base == 16) && 1327 c == '0' && (*s == 'x' || *s == 'X')) { 1328 c = s[1]; 1329 s += 2; 1330 base = 16; 1331 } 1332 if (base == 0) 1333 base = c == '0' ? 8 : 10; 1334 1335 /* 1336 * Compute the cutoff value between legal numbers and illegal 1337 * numbers. That is the largest legal value, divided by the 1338 * base. An input number that is greater than this value, if 1339 * followed by a legal input character, is too big. One that 1340 * is equal to this value may be valid or not; the limit 1341 * between valid and invalid numbers is then based on the last 1342 * digit. For instance, if the range for longs is 1343 * [-2147483648..2147483647] and the input base is 10, 1344 * cutoff will be set to 214748364 and cutlim to either 1345 * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated 1346 * a value > 214748364, or equal but the next digit is > 7 (or 8), 1347 * the number is too big, and we will return a range error. 1348 * 1349 * Set any if any `digits' consumed; make it negative to indicate 1350 * overflow. 1351 */ 1352 cutoff = neg ? LONG_MIN : LONG_MAX; 1353 cutlim = cutoff % base; 1354 cutoff /= base; 1355 if (neg) { 1356 if (cutlim > 0) { 1357 cutlim -= base; 1358 cutoff += 1; 1359 } 1360 cutlim = -cutlim; 1361 } 1362 for (acc = 0, any = 0;; c = (unsigned char) *s++) { 1363 if (c >= '0' && c <= '9') 1364 c -= '0'; 1365 else if (c >= 'A' && c <= 'Z') 1366 c -= 'A' - 10; 1367 else if( c >= 'a' && c <= 'z') 1368 c -= 'a' - 10; 1369 else 1370 break; 1371 if (c >= base) 1372 break; 1373 if (any < 0) 1374 continue; 1375 if (neg) { 1376 if (acc < cutoff || (acc == cutoff && c > cutlim)) { 1377 any = -1; 1378 acc = LONG_MIN; 1379 errno = ERANGE; 1380 } else { 1381 any = 1; 1382 acc *= base; 1383 acc -= c; 1384 } 1385 } else { 1386 if (acc > cutoff || (acc == cutoff && c > cutlim)) { 1387 any = -1; 1388 acc = LONG_MAX; 1389 errno = ERANGE; 1390 } else { 1391 any = 1; 1392 acc *= base; 1393 acc += c; 1394 } 1395 } 1396 } 1397 if (endptr != 0) 1398 *endptr = (char *) (any ? s - 1 : nptr); 1399 return (acc); 1400 } 1401