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 <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <dev/drm2/drmP.h> 37 #include <dev/drm2/drm.h> 38 #include <dev/drm2/drm_crtc.h> 39 40 #define KHZ2PICOS(a) (1000000000UL/(a)) 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(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 63 /** 64 * drm_cvt_mode -create a modeline based on CVT algorithm 65 * @dev: DRM device 66 * @hdisplay: hdisplay size 67 * @vdisplay: vdisplay size 68 * @vrefresh : vrefresh rate 69 * @reduced : Whether the GTF calculation is simplified 70 * @interlaced:Whether the interlace is supported 71 * 72 * LOCKING: 73 * none. 74 * 75 * return the modeline based on CVT algorithm 76 * 77 * This function is called to generate the modeline based on CVT algorithm 78 * according to the hdisplay, vdisplay, vrefresh. 79 * It is based from the VESA(TM) Coordinated Video Timing Generator by 80 * Graham Loveridge April 9, 2003 available at 81 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 82 * 83 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 84 * What I have done is to translate it by using integer calculation. 85 */ 86 #define HV_FACTOR 1000 87 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 88 int vdisplay, int vrefresh, 89 bool reduced, bool interlaced, bool margins) 90 { 91 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 92 #define CVT_MARGIN_PERCENTAGE 18 93 /* 2) character cell horizontal granularity (pixels) - default 8 */ 94 #define CVT_H_GRANULARITY 8 95 /* 3) Minimum vertical porch (lines) - default 3 */ 96 #define CVT_MIN_V_PORCH 3 97 /* 4) Minimum number of vertical back porch lines - default 6 */ 98 #define CVT_MIN_V_BPORCH 6 99 /* Pixel Clock step (kHz) */ 100 #define CVT_CLOCK_STEP 250 101 struct drm_display_mode *drm_mode; 102 unsigned int vfieldrate, hperiod; 103 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 104 int interlace; 105 106 /* allocate the drm_display_mode structure. If failure, we will 107 * return directly 108 */ 109 drm_mode = drm_mode_create(dev); 110 if (!drm_mode) 111 return NULL; 112 113 /* the CVT default refresh rate is 60Hz */ 114 if (!vrefresh) 115 vrefresh = 60; 116 117 /* the required field fresh rate */ 118 if (interlaced) 119 vfieldrate = vrefresh * 2; 120 else 121 vfieldrate = vrefresh; 122 123 /* horizontal pixels */ 124 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 125 126 /* determine the left&right borders */ 127 hmargin = 0; 128 if (margins) { 129 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 130 hmargin -= hmargin % CVT_H_GRANULARITY; 131 } 132 /* find the total active pixels */ 133 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 134 135 /* find the number of lines per field */ 136 if (interlaced) 137 vdisplay_rnd = vdisplay / 2; 138 else 139 vdisplay_rnd = vdisplay; 140 141 /* find the top & bottom borders */ 142 vmargin = 0; 143 if (margins) 144 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 145 146 drm_mode->vdisplay = vdisplay + 2 * vmargin; 147 148 /* Interlaced */ 149 if (interlaced) 150 interlace = 1; 151 else 152 interlace = 0; 153 154 /* Determine VSync Width from aspect ratio */ 155 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 156 vsync = 4; 157 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 158 vsync = 5; 159 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 160 vsync = 6; 161 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 162 vsync = 7; 163 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 164 vsync = 7; 165 else /* custom */ 166 vsync = 10; 167 168 if (!reduced) { 169 /* simplify the GTF calculation */ 170 /* 4) Minimum time of vertical sync + back porch interval (µs) 171 * default 550.0 172 */ 173 int tmp1, tmp2; 174 #define CVT_MIN_VSYNC_BP 550 175 /* 3) Nominal HSync width (% of line period) - default 8 */ 176 #define CVT_HSYNC_PERCENTAGE 8 177 unsigned int hblank_percentage; 178 int vsyncandback_porch, vback_porch, hblank; 179 180 /* estimated the horizontal period */ 181 tmp1 = HV_FACTOR * 1000000 - 182 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 183 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 184 interlace; 185 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 186 187 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 188 /* 9. Find number of lines in sync + backporch */ 189 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 190 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 191 else 192 vsyncandback_porch = tmp1; 193 /* 10. Find number of lines in back porch */ 194 vback_porch = vsyncandback_porch - vsync; 195 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 196 vsyncandback_porch + CVT_MIN_V_PORCH; 197 /* 5) Definition of Horizontal blanking time limitation */ 198 /* Gradient (%/kHz) - default 600 */ 199 #define CVT_M_FACTOR 600 200 /* Offset (%) - default 40 */ 201 #define CVT_C_FACTOR 40 202 /* Blanking time scaling factor - default 128 */ 203 #define CVT_K_FACTOR 128 204 /* Scaling factor weighting - default 20 */ 205 #define CVT_J_FACTOR 20 206 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 207 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 208 CVT_J_FACTOR) 209 /* 12. Find ideal blanking duty cycle from formula */ 210 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 211 hperiod / 1000; 212 /* 13. Blanking time */ 213 if (hblank_percentage < 20 * HV_FACTOR) 214 hblank_percentage = 20 * HV_FACTOR; 215 hblank = drm_mode->hdisplay * hblank_percentage / 216 (100 * HV_FACTOR - hblank_percentage); 217 hblank -= hblank % (2 * CVT_H_GRANULARITY); 218 /* 14. find the total pixes per line */ 219 drm_mode->htotal = drm_mode->hdisplay + hblank; 220 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 221 drm_mode->hsync_start = drm_mode->hsync_end - 222 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 223 drm_mode->hsync_start += CVT_H_GRANULARITY - 224 drm_mode->hsync_start % CVT_H_GRANULARITY; 225 /* fill the Vsync values */ 226 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 227 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 228 } else { 229 /* Reduced blanking */ 230 /* Minimum vertical blanking interval time (µs)- default 460 */ 231 #define CVT_RB_MIN_VBLANK 460 232 /* Fixed number of clocks for horizontal sync */ 233 #define CVT_RB_H_SYNC 32 234 /* Fixed number of clocks for horizontal blanking */ 235 #define CVT_RB_H_BLANK 160 236 /* Fixed number of lines for vertical front porch - default 3*/ 237 #define CVT_RB_VFPORCH 3 238 int vbilines; 239 int tmp1, tmp2; 240 /* 8. Estimate Horizontal period. */ 241 tmp1 = HV_FACTOR * 1000000 - 242 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 243 tmp2 = vdisplay_rnd + 2 * vmargin; 244 hperiod = tmp1 / (tmp2 * vfieldrate); 245 /* 9. Find number of lines in vertical blanking */ 246 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 247 /* 10. Check if vertical blanking is sufficient */ 248 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 249 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 250 /* 11. Find total number of lines in vertical field */ 251 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 252 /* 12. Find total number of pixels in a line */ 253 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 254 /* Fill in HSync values */ 255 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 256 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 257 /* Fill in VSync values */ 258 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 259 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 260 } 261 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 262 drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod; 263 drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP; 264 /* 18/16. Find actual vertical frame frequency */ 265 /* ignore - just set the mode flag for interlaced */ 266 if (interlaced) { 267 drm_mode->vtotal *= 2; 268 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 269 } 270 /* Fill the mode line name */ 271 drm_mode_set_name(drm_mode); 272 if (reduced) 273 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 274 DRM_MODE_FLAG_NVSYNC); 275 else 276 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 277 DRM_MODE_FLAG_NHSYNC); 278 279 return drm_mode; 280 } 281 282 /** 283 * drm_gtf_mode_complex - create the modeline based on full GTF algorithm 284 * 285 * @dev :drm device 286 * @hdisplay :hdisplay size 287 * @vdisplay :vdisplay size 288 * @vrefresh :vrefresh rate. 289 * @interlaced :whether the interlace is supported 290 * @margins :desired margin size 291 * @GTF_[MCKJ] :extended GTF formula parameters 292 * 293 * LOCKING. 294 * none. 295 * 296 * return the modeline based on full GTF algorithm. 297 * 298 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 299 * in here multiplied by two. For a C of 40, pass in 80. 300 */ 301 struct drm_display_mode * 302 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 303 int vrefresh, bool interlaced, int margins, 304 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 305 { /* 1) top/bottom margin size (% of height) - default: 1.8, */ 306 #define GTF_MARGIN_PERCENTAGE 18 307 /* 2) character cell horizontal granularity (pixels) - default 8 */ 308 #define GTF_CELL_GRAN 8 309 /* 3) Minimum vertical porch (lines) - default 3 */ 310 #define GTF_MIN_V_PORCH 1 311 /* width of vsync in lines */ 312 #define V_SYNC_RQD 3 313 /* width of hsync as % of total line */ 314 #define H_SYNC_PERCENT 8 315 /* min time of vsync + back porch (microsec) */ 316 #define MIN_VSYNC_PLUS_BP 550 317 /* C' and M' are part of the Blanking Duty Cycle computation */ 318 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 319 #define GTF_M_PRIME (GTF_K * GTF_M / 256) 320 struct drm_display_mode *drm_mode; 321 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 322 int top_margin, bottom_margin; 323 int interlace; 324 unsigned int hfreq_est; 325 int vsync_plus_bp, vback_porch; 326 unsigned int vtotal_lines, vfieldrate_est, hperiod; 327 unsigned int vfield_rate, vframe_rate; 328 int left_margin, right_margin; 329 unsigned int total_active_pixels, ideal_duty_cycle; 330 unsigned int hblank, total_pixels, pixel_freq; 331 int hsync, hfront_porch, vodd_front_porch_lines; 332 unsigned int tmp1, tmp2; 333 334 drm_mode = drm_mode_create(dev); 335 if (!drm_mode) 336 return NULL; 337 338 /* 1. In order to give correct results, the number of horizontal 339 * pixels requested is first processed to ensure that it is divisible 340 * by the character size, by rounding it to the nearest character 341 * cell boundary: 342 */ 343 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 344 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 345 346 /* 2. If interlace is requested, the number of vertical lines assumed 347 * by the calculation must be halved, as the computation calculates 348 * the number of vertical lines per field. 349 */ 350 if (interlaced) 351 vdisplay_rnd = vdisplay / 2; 352 else 353 vdisplay_rnd = vdisplay; 354 355 /* 3. Find the frame rate required: */ 356 if (interlaced) 357 vfieldrate_rqd = vrefresh * 2; 358 else 359 vfieldrate_rqd = vrefresh; 360 361 /* 4. Find number of lines in Top margin: */ 362 top_margin = 0; 363 if (margins) 364 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 365 1000; 366 /* 5. Find number of lines in bottom margin: */ 367 bottom_margin = top_margin; 368 369 /* 6. If interlace is required, then set variable interlace: */ 370 if (interlaced) 371 interlace = 1; 372 else 373 interlace = 0; 374 375 /* 7. Estimate the Horizontal frequency */ 376 { 377 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 378 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 379 2 + interlace; 380 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 381 } 382 383 /* 8. Find the number of lines in V sync + back porch */ 384 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 385 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 386 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 387 /* 9. Find the number of lines in V back porch alone: */ 388 vback_porch = vsync_plus_bp - V_SYNC_RQD; 389 /* 10. Find the total number of lines in Vertical field period: */ 390 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 391 vsync_plus_bp + GTF_MIN_V_PORCH; 392 /* 11. Estimate the Vertical field frequency: */ 393 vfieldrate_est = hfreq_est / vtotal_lines; 394 /* 12. Find the actual horizontal period: */ 395 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 396 397 /* 13. Find the actual Vertical field frequency: */ 398 vfield_rate = hfreq_est / vtotal_lines; 399 /* 14. Find the Vertical frame frequency: */ 400 if (interlaced) 401 vframe_rate = vfield_rate / 2; 402 else 403 vframe_rate = vfield_rate; 404 /* 15. Find number of pixels in left margin: */ 405 if (margins) 406 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 407 1000; 408 else 409 left_margin = 0; 410 411 /* 16.Find number of pixels in right margin: */ 412 right_margin = left_margin; 413 /* 17.Find total number of active pixels in image and left and right */ 414 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 415 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 416 ideal_duty_cycle = GTF_C_PRIME * 1000 - 417 (GTF_M_PRIME * 1000000 / hfreq_est); 418 /* 19.Find the number of pixels in the blanking time to the nearest 419 * double character cell: */ 420 hblank = total_active_pixels * ideal_duty_cycle / 421 (100000 - ideal_duty_cycle); 422 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 423 hblank = hblank * 2 * GTF_CELL_GRAN; 424 /* 20.Find total number of pixels: */ 425 total_pixels = total_active_pixels + hblank; 426 /* 21.Find pixel clock frequency: */ 427 pixel_freq = total_pixels * hfreq_est / 1000; 428 /* Stage 1 computations are now complete; I should really pass 429 * the results to another function and do the Stage 2 computations, 430 * but I only need a few more values so I'll just append the 431 * computations here for now */ 432 /* 17. Find the number of pixels in the horizontal sync period: */ 433 hsync = H_SYNC_PERCENT * total_pixels / 100; 434 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 435 hsync = hsync * GTF_CELL_GRAN; 436 /* 18. Find the number of pixels in horizontal front porch period */ 437 hfront_porch = hblank / 2 - hsync; 438 /* 36. Find the number of lines in the odd front porch period: */ 439 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 440 441 /* finally, pack the results in the mode struct */ 442 drm_mode->hdisplay = hdisplay_rnd; 443 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 444 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 445 drm_mode->htotal = total_pixels; 446 drm_mode->vdisplay = vdisplay_rnd; 447 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 448 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 449 drm_mode->vtotal = vtotal_lines; 450 451 drm_mode->clock = pixel_freq; 452 453 if (interlaced) { 454 drm_mode->vtotal *= 2; 455 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 456 } 457 458 drm_mode_set_name(drm_mode); 459 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 460 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 461 else 462 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 463 464 return drm_mode; 465 } 466 467 /** 468 * drm_gtf_mode - create the modeline based on GTF algorithm 469 * 470 * @dev :drm device 471 * @hdisplay :hdisplay size 472 * @vdisplay :vdisplay size 473 * @vrefresh :vrefresh rate. 474 * @interlaced :whether the interlace is supported 475 * @margins :whether the margin is supported 476 * 477 * LOCKING. 478 * none. 479 * 480 * return the modeline based on GTF algorithm 481 * 482 * This function is to create the modeline based on the GTF algorithm. 483 * Generalized Timing Formula is derived from: 484 * GTF Spreadsheet by Andy Morrish (1/5/97) 485 * available at http://www.vesa.org 486 * 487 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 488 * What I have done is to translate it by using integer calculation. 489 * I also refer to the function of fb_get_mode in the file of 490 * drivers/video/fbmon.c 491 * 492 * Standard GTF parameters: 493 * M = 600 494 * C = 40 495 * K = 128 496 * J = 20 497 */ 498 struct drm_display_mode * 499 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 500 bool lace, int margins) 501 { 502 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, lace, 503 margins, 600, 40 * 2, 128, 20 * 2); 504 } 505 506 /** 507 * drm_mode_set_name - set the name on a mode 508 * @mode: name will be set in this mode 509 * 510 * LOCKING: 511 * None. 512 * 513 * Set the name of @mode to a standard format. 514 */ 515 void drm_mode_set_name(struct drm_display_mode *mode) 516 { 517 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 518 519 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 520 mode->hdisplay, mode->vdisplay, 521 interlaced ? "i" : ""); 522 } 523 524 /** 525 * drm_mode_list_concat - move modes from one list to another 526 * @head: source list 527 * @new: dst list 528 * 529 * LOCKING: 530 * Caller must ensure both lists are locked. 531 * 532 * Move all the modes from @head to @new. 533 */ 534 void drm_mode_list_concat(struct list_head *head, struct list_head *new) 535 { 536 537 struct list_head *entry, *tmp; 538 539 list_for_each_safe(entry, tmp, head) { 540 list_move_tail(entry, new); 541 } 542 } 543 544 /** 545 * drm_mode_width - get the width of a mode 546 * @mode: mode 547 * 548 * LOCKING: 549 * None. 550 * 551 * Return @mode's width (hdisplay) value. 552 * 553 * FIXME: is this needed? 554 * 555 * RETURNS: 556 * @mode->hdisplay 557 */ 558 int drm_mode_width(struct drm_display_mode *mode) 559 { 560 return mode->hdisplay; 561 562 } 563 564 /** 565 * drm_mode_height - get the height of a mode 566 * @mode: mode 567 * 568 * LOCKING: 569 * None. 570 * 571 * Return @mode's height (vdisplay) value. 572 * 573 * FIXME: is this needed? 574 * 575 * RETURNS: 576 * @mode->vdisplay 577 */ 578 int drm_mode_height(struct drm_display_mode *mode) 579 { 580 return mode->vdisplay; 581 } 582 583 /** drm_mode_hsync - get the hsync of a mode 584 * @mode: mode 585 * 586 * LOCKING: 587 * None. 588 * 589 * Return @modes's hsync rate in kHz, rounded to the nearest int. 590 */ 591 int drm_mode_hsync(const struct drm_display_mode *mode) 592 { 593 unsigned int calc_val; 594 595 if (mode->hsync) 596 return mode->hsync; 597 598 if (mode->htotal < 0) 599 return 0; 600 601 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ 602 calc_val += 500; /* round to 1000Hz */ 603 calc_val /= 1000; /* truncate to kHz */ 604 605 return calc_val; 606 } 607 608 /** 609 * drm_mode_vrefresh - get the vrefresh of a mode 610 * @mode: mode 611 * 612 * LOCKING: 613 * None. 614 * 615 * Return @mode's vrefresh rate in Hz or calculate it if necessary. 616 * 617 * FIXME: why is this needed? shouldn't vrefresh be set already? 618 * 619 * RETURNS: 620 * Vertical refresh rate. It will be the result of actual value plus 0.5. 621 * If it is 70.288, it will return 70Hz. 622 * If it is 59.6, it will return 60Hz. 623 */ 624 int drm_mode_vrefresh(const struct drm_display_mode *mode) 625 { 626 int refresh = 0; 627 unsigned int calc_val; 628 629 if (mode->vrefresh > 0) 630 refresh = mode->vrefresh; 631 else if (mode->htotal > 0 && mode->vtotal > 0) { 632 int vtotal; 633 vtotal = mode->vtotal; 634 /* work out vrefresh the value will be x1000 */ 635 calc_val = (mode->clock * 1000); 636 calc_val /= mode->htotal; 637 refresh = (calc_val + vtotal / 2) / vtotal; 638 639 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 640 refresh *= 2; 641 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 642 refresh /= 2; 643 if (mode->vscan > 1) 644 refresh /= mode->vscan; 645 } 646 return refresh; 647 } 648 649 /** 650 * drm_mode_set_crtcinfo - set CRTC modesetting parameters 651 * @p: mode 652 * @adjust_flags: unused? (FIXME) 653 * 654 * LOCKING: 655 * None. 656 * 657 * Setup the CRTC modesetting parameters for @p, adjusting if necessary. 658 */ 659 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 660 { 661 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) 662 return; 663 664 p->crtc_hdisplay = p->hdisplay; 665 p->crtc_hsync_start = p->hsync_start; 666 p->crtc_hsync_end = p->hsync_end; 667 p->crtc_htotal = p->htotal; 668 p->crtc_hskew = p->hskew; 669 p->crtc_vdisplay = p->vdisplay; 670 p->crtc_vsync_start = p->vsync_start; 671 p->crtc_vsync_end = p->vsync_end; 672 p->crtc_vtotal = p->vtotal; 673 674 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 675 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 676 p->crtc_vdisplay /= 2; 677 p->crtc_vsync_start /= 2; 678 p->crtc_vsync_end /= 2; 679 p->crtc_vtotal /= 2; 680 } 681 682 p->crtc_vtotal |= 1; 683 } 684 685 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 686 p->crtc_vdisplay *= 2; 687 p->crtc_vsync_start *= 2; 688 p->crtc_vsync_end *= 2; 689 p->crtc_vtotal *= 2; 690 } 691 692 if (p->vscan > 1) { 693 p->crtc_vdisplay *= p->vscan; 694 p->crtc_vsync_start *= p->vscan; 695 p->crtc_vsync_end *= p->vscan; 696 p->crtc_vtotal *= p->vscan; 697 } 698 699 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 700 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 701 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 702 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 703 704 p->crtc_hadjusted = false; 705 p->crtc_vadjusted = false; 706 } 707 708 709 /** 710 * drm_mode_duplicate - allocate and duplicate an existing mode 711 * @m: mode to duplicate 712 * 713 * LOCKING: 714 * None. 715 * 716 * Just allocate a new mode, copy the existing mode into it, and return 717 * a pointer to it. Used to create new instances of established modes. 718 */ 719 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 720 const struct drm_display_mode *mode) 721 { 722 struct drm_display_mode *nmode; 723 int new_id; 724 725 nmode = drm_mode_create(dev); 726 if (!nmode) 727 return NULL; 728 729 new_id = nmode->base.id; 730 *nmode = *mode; 731 nmode->base.id = new_id; 732 INIT_LIST_HEAD(&nmode->head); 733 return nmode; 734 } 735 736 /** 737 * drm_mode_equal - test modes for equality 738 * @mode1: first mode 739 * @mode2: second mode 740 * 741 * LOCKING: 742 * None. 743 * 744 * Check to see if @mode1 and @mode2 are equivalent. 745 * 746 * RETURNS: 747 * true if the modes are equal, false otherwise. 748 */ 749 bool drm_mode_equal(struct drm_display_mode *mode1, struct drm_display_mode *mode2) 750 { 751 /* do clock check convert to PICOS so fb modes get matched 752 * the same */ 753 if (mode1->clock && mode2->clock) { 754 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) 755 return false; 756 } else if (mode1->clock != mode2->clock) 757 return false; 758 759 if (mode1->hdisplay == mode2->hdisplay && 760 mode1->hsync_start == mode2->hsync_start && 761 mode1->hsync_end == mode2->hsync_end && 762 mode1->htotal == mode2->htotal && 763 mode1->hskew == mode2->hskew && 764 mode1->vdisplay == mode2->vdisplay && 765 mode1->vsync_start == mode2->vsync_start && 766 mode1->vsync_end == mode2->vsync_end && 767 mode1->vtotal == mode2->vtotal && 768 mode1->vscan == mode2->vscan && 769 mode1->flags == mode2->flags) 770 return true; 771 772 return false; 773 } 774 775 /** 776 * drm_mode_validate_size - make sure modes adhere to size constraints 777 * @dev: DRM device 778 * @mode_list: list of modes to check 779 * @maxX: maximum width 780 * @maxY: maximum height 781 * @maxPitch: max pitch 782 * 783 * LOCKING: 784 * Caller must hold a lock protecting @mode_list. 785 * 786 * The DRM device (@dev) has size and pitch limits. Here we validate the 787 * modes we probed for @dev against those limits and set their status as 788 * necessary. 789 */ 790 void drm_mode_validate_size(struct drm_device *dev, 791 struct list_head *mode_list, 792 int maxX, int maxY, int maxPitch) 793 { 794 struct drm_display_mode *mode; 795 796 list_for_each_entry(mode, mode_list, head) { 797 if (maxPitch > 0 && mode->hdisplay > maxPitch) 798 mode->status = MODE_BAD_WIDTH; 799 800 if (maxX > 0 && mode->hdisplay > maxX) 801 mode->status = MODE_VIRTUAL_X; 802 803 if (maxY > 0 && mode->vdisplay > maxY) 804 mode->status = MODE_VIRTUAL_Y; 805 } 806 } 807 808 /** 809 * drm_mode_validate_clocks - validate modes against clock limits 810 * @dev: DRM device 811 * @mode_list: list of modes to check 812 * @min: minimum clock rate array 813 * @max: maximum clock rate array 814 * @n_ranges: number of clock ranges (size of arrays) 815 * 816 * LOCKING: 817 * Caller must hold a lock protecting @mode_list. 818 * 819 * Some code may need to check a mode list against the clock limits of the 820 * device in question. This function walks the mode list, testing to make 821 * sure each mode falls within a given range (defined by @min and @max 822 * arrays) and sets @mode->status as needed. 823 */ 824 void drm_mode_validate_clocks(struct drm_device *dev, 825 struct list_head *mode_list, 826 int *min, int *max, int n_ranges) 827 { 828 struct drm_display_mode *mode; 829 int i; 830 831 list_for_each_entry(mode, mode_list, head) { 832 bool good = false; 833 for (i = 0; i < n_ranges; i++) { 834 if (mode->clock >= min[i] && mode->clock <= max[i]) { 835 good = true; 836 break; 837 } 838 } 839 if (!good) 840 mode->status = MODE_CLOCK_RANGE; 841 } 842 } 843 844 /** 845 * drm_mode_prune_invalid - remove invalid modes from mode list 846 * @dev: DRM device 847 * @mode_list: list of modes to check 848 * @verbose: be verbose about it 849 * 850 * LOCKING: 851 * Caller must hold a lock protecting @mode_list. 852 * 853 * Once mode list generation is complete, a caller can use this routine to 854 * remove invalid modes from a mode list. If any of the modes have a 855 * status other than %MODE_OK, they are removed from @mode_list and freed. 856 */ 857 void drm_mode_prune_invalid(struct drm_device *dev, 858 struct list_head *mode_list, bool verbose) 859 { 860 struct drm_display_mode *mode, *t; 861 862 list_for_each_entry_safe(mode, t, mode_list, head) { 863 if (mode->status != MODE_OK) { 864 list_del(&mode->head); 865 if (verbose) { 866 drm_mode_debug_printmodeline(mode); 867 DRM_DEBUG_KMS("Not using %s mode %d\n", 868 mode->name, mode->status); 869 } 870 drm_mode_destroy(dev, mode); 871 } 872 } 873 } 874 875 /** 876 * drm_mode_compare - compare modes for favorability 877 * @priv: unused 878 * @lh_a: list_head for first mode 879 * @lh_b: list_head for second mode 880 * 881 * LOCKING: 882 * None. 883 * 884 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 885 * which is better. 886 * 887 * RETURNS: 888 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 889 * positive if @lh_b is better than @lh_a. 890 */ 891 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) 892 { 893 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 894 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 895 int diff; 896 897 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 898 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 899 if (diff) 900 return diff; 901 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 902 if (diff) 903 return diff; 904 diff = b->clock - a->clock; 905 return diff; 906 } 907 908 /** 909 * drm_mode_sort - sort mode list 910 * @mode_list: list to sort 911 * 912 * LOCKING: 913 * Caller must hold a lock protecting @mode_list. 914 * 915 * Sort @mode_list by favorability, putting good modes first. 916 */ 917 void drm_mode_sort(struct list_head *mode_list) 918 { 919 drm_list_sort(NULL, mode_list, drm_mode_compare); 920 } 921 922 /** 923 * drm_mode_connector_list_update - update the mode list for the connector 924 * @connector: the connector to update 925 * 926 * LOCKING: 927 * Caller must hold a lock protecting @mode_list. 928 * 929 * This moves the modes from the @connector probed_modes list 930 * to the actual mode list. It compares the probed mode against the current 931 * list and only adds different modes. All modes unverified after this point 932 * will be removed by the prune invalid modes. 933 */ 934 void drm_mode_connector_list_update(struct drm_connector *connector) 935 { 936 struct drm_display_mode *mode; 937 struct drm_display_mode *pmode, *pt; 938 int found_it; 939 940 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, 941 head) { 942 found_it = 0; 943 /* go through current modes checking for the new probed mode */ 944 list_for_each_entry(mode, &connector->modes, head) { 945 if (drm_mode_equal(pmode, mode)) { 946 found_it = 1; 947 /* if equal delete the probed mode */ 948 mode->status = pmode->status; 949 /* Merge type bits together */ 950 mode->type |= pmode->type; 951 list_del(&pmode->head); 952 drm_mode_destroy(connector->dev, pmode); 953 break; 954 } 955 } 956 957 if (!found_it) { 958 list_move_tail(&pmode->head, &connector->modes); 959 } 960 } 961 } 962 963 /** 964 * drm_mode_parse_command_line_for_connector - parse command line for connector 965 * @mode_option - per connector mode option 966 * @connector - connector to parse line for 967 * 968 * This parses the connector specific then generic command lines for 969 * modes and options to configure the connector. 970 * 971 * This uses the same parameters as the fb modedb.c, except for extra 972 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 973 * 974 * enable/enable Digital/disable bit at the end 975 */ 976 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 977 struct drm_connector *connector, 978 struct drm_cmdline_mode *mode) 979 { 980 const char *name; 981 unsigned int namelen; 982 bool res_specified = false, bpp_specified = false, refresh_specified = false; 983 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; 984 bool yres_specified = false, cvt = false, rb = false; 985 bool interlace = false, margins = false, was_digit = false; 986 int i; 987 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; 988 989 #ifdef XXX_CONFIG_FB 990 if (!mode_option) 991 mode_option = fb_mode_option; 992 #endif 993 994 if (!mode_option) { 995 mode->specified = false; 996 return false; 997 } 998 999 name = mode_option; 1000 namelen = strlen(name); 1001 for (i = namelen-1; i >= 0; i--) { 1002 switch (name[i]) { 1003 case '@': 1004 if (!refresh_specified && !bpp_specified && 1005 !yres_specified && !cvt && !rb && was_digit) { 1006 refresh = strtol(&name[i+1], NULL, 10); 1007 refresh_specified = true; 1008 was_digit = false; 1009 } else 1010 goto done; 1011 break; 1012 case '-': 1013 if (!bpp_specified && !yres_specified && !cvt && 1014 !rb && was_digit) { 1015 bpp = strtol(&name[i+1], NULL, 10); 1016 bpp_specified = true; 1017 was_digit = false; 1018 } else 1019 goto done; 1020 break; 1021 case 'x': 1022 if (!yres_specified && was_digit) { 1023 yres = strtol(&name[i+1], NULL, 10); 1024 yres_specified = true; 1025 was_digit = false; 1026 } else 1027 goto done; 1028 case '0' ... '9': 1029 was_digit = true; 1030 break; 1031 case 'M': 1032 if (yres_specified || cvt || was_digit) 1033 goto done; 1034 cvt = true; 1035 break; 1036 case 'R': 1037 if (yres_specified || cvt || rb || was_digit) 1038 goto done; 1039 rb = true; 1040 break; 1041 case 'm': 1042 if (cvt || yres_specified || was_digit) 1043 goto done; 1044 margins = true; 1045 break; 1046 case 'i': 1047 if (cvt || yres_specified || was_digit) 1048 goto done; 1049 interlace = true; 1050 break; 1051 case 'e': 1052 if (yres_specified || bpp_specified || refresh_specified || 1053 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1054 goto done; 1055 1056 force = DRM_FORCE_ON; 1057 break; 1058 case 'D': 1059 if (yres_specified || bpp_specified || refresh_specified || 1060 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1061 goto done; 1062 1063 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1064 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1065 force = DRM_FORCE_ON; 1066 else 1067 force = DRM_FORCE_ON_DIGITAL; 1068 break; 1069 case 'd': 1070 if (yres_specified || bpp_specified || refresh_specified || 1071 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1072 goto done; 1073 1074 force = DRM_FORCE_OFF; 1075 break; 1076 default: 1077 goto done; 1078 } 1079 } 1080 1081 if (i < 0 && yres_specified) { 1082 char *ch; 1083 xres = strtol(name, &ch, 10); 1084 if ((ch != NULL) && (*ch == 'x')) 1085 res_specified = true; 1086 else 1087 i = ch - name; 1088 } else if (!yres_specified && was_digit) { 1089 /* catch mode that begins with digits but has no 'x' */ 1090 i = 0; 1091 } 1092 done: 1093 if (i >= 0) { 1094 printf("parse error at position %i in video mode '%s'\n", 1095 i, name); 1096 mode->specified = false; 1097 return false; 1098 } 1099 1100 if (res_specified) { 1101 mode->specified = true; 1102 mode->xres = xres; 1103 mode->yres = yres; 1104 } 1105 1106 if (refresh_specified) { 1107 mode->refresh_specified = true; 1108 mode->refresh = refresh; 1109 } 1110 1111 if (bpp_specified) { 1112 mode->bpp_specified = true; 1113 mode->bpp = bpp; 1114 } 1115 mode->rb = rb; 1116 mode->cvt = cvt; 1117 mode->interlace = interlace; 1118 mode->margins = margins; 1119 mode->force = force; 1120 1121 return true; 1122 } 1123 1124 struct drm_display_mode * 1125 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1126 struct drm_cmdline_mode *cmd) 1127 { 1128 struct drm_display_mode *mode; 1129 1130 if (cmd->cvt) 1131 mode = drm_cvt_mode(dev, 1132 cmd->xres, cmd->yres, 1133 cmd->refresh_specified ? cmd->refresh : 60, 1134 cmd->rb, cmd->interlace, 1135 cmd->margins); 1136 else 1137 mode = drm_gtf_mode(dev, 1138 cmd->xres, cmd->yres, 1139 cmd->refresh_specified ? cmd->refresh : 60, 1140 cmd->interlace, 1141 cmd->margins); 1142 if (!mode) 1143 return NULL; 1144 1145 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1146 return mode; 1147 } 1148