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