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_unregister(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 u64 tmp; 169 170 /* allocate the drm_display_mode structure. If failure, we will 171 * return directly 172 */ 173 drm_mode = drm_mode_create(dev); 174 if (!drm_mode) 175 return NULL; 176 177 /* the CVT default refresh rate is 60Hz */ 178 if (!vrefresh) 179 vrefresh = 60; 180 181 /* the required field fresh rate */ 182 if (interlaced) 183 vfieldrate = vrefresh * 2; 184 else 185 vfieldrate = vrefresh; 186 187 /* horizontal pixels */ 188 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 189 190 /* determine the left&right borders */ 191 hmargin = 0; 192 if (margins) { 193 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 194 hmargin -= hmargin % CVT_H_GRANULARITY; 195 } 196 /* find the total active pixels */ 197 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 198 199 /* find the number of lines per field */ 200 if (interlaced) 201 vdisplay_rnd = vdisplay / 2; 202 else 203 vdisplay_rnd = vdisplay; 204 205 /* find the top & bottom borders */ 206 vmargin = 0; 207 if (margins) 208 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 209 210 drm_mode->vdisplay = vdisplay + 2 * vmargin; 211 212 /* Interlaced */ 213 if (interlaced) 214 interlace = 1; 215 else 216 interlace = 0; 217 218 /* Determine VSync Width from aspect ratio */ 219 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 220 vsync = 4; 221 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 222 vsync = 5; 223 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 224 vsync = 6; 225 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 226 vsync = 7; 227 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 228 vsync = 7; 229 else /* custom */ 230 vsync = 10; 231 232 if (!reduced) { 233 /* simplify the GTF calculation */ 234 /* 4) Minimum time of vertical sync + back porch interval (µs) 235 * default 550.0 236 */ 237 int tmp1, tmp2; 238 #define CVT_MIN_VSYNC_BP 550 239 /* 3) Nominal HSync width (% of line period) - default 8 */ 240 #define CVT_HSYNC_PERCENTAGE 8 241 unsigned int hblank_percentage; 242 int vsyncandback_porch, vback_porch, hblank; 243 244 /* estimated the horizontal period */ 245 tmp1 = HV_FACTOR * 1000000 - 246 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 247 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 248 interlace; 249 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 250 251 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 252 /* 9. Find number of lines in sync + backporch */ 253 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 254 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 255 else 256 vsyncandback_porch = tmp1; 257 /* 10. Find number of lines in back porch */ 258 vback_porch = vsyncandback_porch - vsync; 259 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 260 vsyncandback_porch + CVT_MIN_V_PORCH; 261 /* 5) Definition of Horizontal blanking time limitation */ 262 /* Gradient (%/kHz) - default 600 */ 263 #define CVT_M_FACTOR 600 264 /* Offset (%) - default 40 */ 265 #define CVT_C_FACTOR 40 266 /* Blanking time scaling factor - default 128 */ 267 #define CVT_K_FACTOR 128 268 /* Scaling factor weighting - default 20 */ 269 #define CVT_J_FACTOR 20 270 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 271 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 272 CVT_J_FACTOR) 273 /* 12. Find ideal blanking duty cycle from formula */ 274 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 275 hperiod / 1000; 276 /* 13. Blanking time */ 277 if (hblank_percentage < 20 * HV_FACTOR) 278 hblank_percentage = 20 * HV_FACTOR; 279 hblank = drm_mode->hdisplay * hblank_percentage / 280 (100 * HV_FACTOR - hblank_percentage); 281 hblank -= hblank % (2 * CVT_H_GRANULARITY); 282 /* 14. find the total pixels per line */ 283 drm_mode->htotal = drm_mode->hdisplay + hblank; 284 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 285 drm_mode->hsync_start = drm_mode->hsync_end - 286 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 287 drm_mode->hsync_start += CVT_H_GRANULARITY - 288 drm_mode->hsync_start % CVT_H_GRANULARITY; 289 /* fill the Vsync values */ 290 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 291 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 292 } else { 293 /* Reduced blanking */ 294 /* Minimum vertical blanking interval time (µs)- default 460 */ 295 #define CVT_RB_MIN_VBLANK 460 296 /* Fixed number of clocks for horizontal sync */ 297 #define CVT_RB_H_SYNC 32 298 /* Fixed number of clocks for horizontal blanking */ 299 #define CVT_RB_H_BLANK 160 300 /* Fixed number of lines for vertical front porch - default 3*/ 301 #define CVT_RB_VFPORCH 3 302 int vbilines; 303 int tmp1, tmp2; 304 /* 8. Estimate Horizontal period. */ 305 tmp1 = HV_FACTOR * 1000000 - 306 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 307 tmp2 = vdisplay_rnd + 2 * vmargin; 308 hperiod = tmp1 / (tmp2 * vfieldrate); 309 /* 9. Find number of lines in vertical blanking */ 310 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 311 /* 10. Check if vertical blanking is sufficient */ 312 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 313 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 314 /* 11. Find total number of lines in vertical field */ 315 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 316 /* 12. Find total number of pixels in a line */ 317 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 318 /* Fill in HSync values */ 319 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 320 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 321 /* Fill in VSync values */ 322 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 323 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 324 } 325 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 326 tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */ 327 tmp *= HV_FACTOR * 1000; 328 do_div(tmp, hperiod); 329 tmp -= drm_mode->clock % CVT_CLOCK_STEP; 330 drm_mode->clock = tmp; 331 /* 18/16. Find actual vertical frame frequency */ 332 /* ignore - just set the mode flag for interlaced */ 333 if (interlaced) { 334 drm_mode->vtotal *= 2; 335 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 336 } 337 /* Fill the mode line name */ 338 drm_mode_set_name(drm_mode); 339 if (reduced) 340 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 341 DRM_MODE_FLAG_NVSYNC); 342 else 343 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 344 DRM_MODE_FLAG_NHSYNC); 345 346 return drm_mode; 347 } 348 EXPORT_SYMBOL(drm_cvt_mode); 349 350 /** 351 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm 352 * @dev: drm device 353 * @hdisplay: hdisplay size 354 * @vdisplay: vdisplay size 355 * @vrefresh: vrefresh rate. 356 * @interlaced: whether to compute an interlaced mode 357 * @margins: desired margin (borders) size 358 * @GTF_M: extended GTF formula parameters 359 * @GTF_2C: extended GTF formula parameters 360 * @GTF_K: extended GTF formula parameters 361 * @GTF_2J: extended GTF formula parameters 362 * 363 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 364 * in here multiplied by two. For a C of 40, pass in 80. 365 * 366 * Returns: 367 * The modeline based on the full GTF algorithm stored in a drm_display_mode object. 368 * The display mode object is allocated with drm_mode_create(). Returns NULL 369 * when no mode could be allocated. 370 */ 371 struct drm_display_mode * 372 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 373 int vrefresh, bool interlaced, int margins, 374 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 375 { /* 1) top/bottom margin size (% of height) - default: 1.8, */ 376 #define GTF_MARGIN_PERCENTAGE 18 377 /* 2) character cell horizontal granularity (pixels) - default 8 */ 378 #define GTF_CELL_GRAN 8 379 /* 3) Minimum vertical porch (lines) - default 3 */ 380 #define GTF_MIN_V_PORCH 1 381 /* width of vsync in lines */ 382 #define V_SYNC_RQD 3 383 /* width of hsync as % of total line */ 384 #define H_SYNC_PERCENT 8 385 /* min time of vsync + back porch (microsec) */ 386 #define MIN_VSYNC_PLUS_BP 550 387 /* C' and M' are part of the Blanking Duty Cycle computation */ 388 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 389 #define GTF_M_PRIME (GTF_K * GTF_M / 256) 390 struct drm_display_mode *drm_mode; 391 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 392 int top_margin, bottom_margin; 393 int interlace; 394 unsigned int hfreq_est; 395 int vsync_plus_bp, vback_porch; 396 unsigned int vtotal_lines, vfieldrate_est, hperiod; 397 unsigned int vfield_rate, vframe_rate; 398 int left_margin, right_margin; 399 unsigned int total_active_pixels, ideal_duty_cycle; 400 unsigned int hblank, total_pixels, pixel_freq; 401 int hsync, hfront_porch, vodd_front_porch_lines; 402 unsigned int tmp1, tmp2; 403 404 drm_mode = drm_mode_create(dev); 405 if (!drm_mode) 406 return NULL; 407 408 /* 1. In order to give correct results, the number of horizontal 409 * pixels requested is first processed to ensure that it is divisible 410 * by the character size, by rounding it to the nearest character 411 * cell boundary: 412 */ 413 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 414 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 415 416 /* 2. If interlace is requested, the number of vertical lines assumed 417 * by the calculation must be halved, as the computation calculates 418 * the number of vertical lines per field. 419 */ 420 if (interlaced) 421 vdisplay_rnd = vdisplay / 2; 422 else 423 vdisplay_rnd = vdisplay; 424 425 /* 3. Find the frame rate required: */ 426 if (interlaced) 427 vfieldrate_rqd = vrefresh * 2; 428 else 429 vfieldrate_rqd = vrefresh; 430 431 /* 4. Find number of lines in Top margin: */ 432 top_margin = 0; 433 if (margins) 434 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 435 1000; 436 /* 5. Find number of lines in bottom margin: */ 437 bottom_margin = top_margin; 438 439 /* 6. If interlace is required, then set variable interlace: */ 440 if (interlaced) 441 interlace = 1; 442 else 443 interlace = 0; 444 445 /* 7. Estimate the Horizontal frequency */ 446 { 447 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 448 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 449 2 + interlace; 450 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 451 } 452 453 /* 8. Find the number of lines in V sync + back porch */ 454 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 455 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 456 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 457 /* 9. Find the number of lines in V back porch alone: */ 458 vback_porch = vsync_plus_bp - V_SYNC_RQD; 459 /* 10. Find the total number of lines in Vertical field period: */ 460 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 461 vsync_plus_bp + GTF_MIN_V_PORCH; 462 /* 11. Estimate the Vertical field frequency: */ 463 vfieldrate_est = hfreq_est / vtotal_lines; 464 /* 12. Find the actual horizontal period: */ 465 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 466 467 /* 13. Find the actual Vertical field frequency: */ 468 vfield_rate = hfreq_est / vtotal_lines; 469 /* 14. Find the Vertical frame frequency: */ 470 if (interlaced) 471 vframe_rate = vfield_rate / 2; 472 else 473 vframe_rate = vfield_rate; 474 /* 15. Find number of pixels in left margin: */ 475 if (margins) 476 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 477 1000; 478 else 479 left_margin = 0; 480 481 /* 16.Find number of pixels in right margin: */ 482 right_margin = left_margin; 483 /* 17.Find total number of active pixels in image and left and right */ 484 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 485 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 486 ideal_duty_cycle = GTF_C_PRIME * 1000 - 487 (GTF_M_PRIME * 1000000 / hfreq_est); 488 /* 19.Find the number of pixels in the blanking time to the nearest 489 * double character cell: */ 490 hblank = total_active_pixels * ideal_duty_cycle / 491 (100000 - ideal_duty_cycle); 492 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 493 hblank = hblank * 2 * GTF_CELL_GRAN; 494 /* 20.Find total number of pixels: */ 495 total_pixels = total_active_pixels + hblank; 496 /* 21.Find pixel clock frequency: */ 497 pixel_freq = total_pixels * hfreq_est / 1000; 498 /* Stage 1 computations are now complete; I should really pass 499 * the results to another function and do the Stage 2 computations, 500 * but I only need a few more values so I'll just append the 501 * computations here for now */ 502 /* 17. Find the number of pixels in the horizontal sync period: */ 503 hsync = H_SYNC_PERCENT * total_pixels / 100; 504 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 505 hsync = hsync * GTF_CELL_GRAN; 506 /* 18. Find the number of pixels in horizontal front porch period */ 507 hfront_porch = hblank / 2 - hsync; 508 /* 36. Find the number of lines in the odd front porch period: */ 509 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 510 511 /* finally, pack the results in the mode struct */ 512 drm_mode->hdisplay = hdisplay_rnd; 513 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 514 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 515 drm_mode->htotal = total_pixels; 516 drm_mode->vdisplay = vdisplay_rnd; 517 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 518 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 519 drm_mode->vtotal = vtotal_lines; 520 521 drm_mode->clock = pixel_freq; 522 523 if (interlaced) { 524 drm_mode->vtotal *= 2; 525 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 526 } 527 528 drm_mode_set_name(drm_mode); 529 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 530 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 531 else 532 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 533 534 return drm_mode; 535 } 536 EXPORT_SYMBOL(drm_gtf_mode_complex); 537 538 /** 539 * drm_gtf_mode - create the modeline based on the GTF algorithm 540 * @dev: drm device 541 * @hdisplay: hdisplay size 542 * @vdisplay: vdisplay size 543 * @vrefresh: vrefresh rate. 544 * @interlaced: whether to compute an interlaced mode 545 * @margins: desired margin (borders) size 546 * 547 * return the modeline based on GTF algorithm 548 * 549 * This function is to create the modeline based on the GTF algorithm. 550 * Generalized Timing Formula is derived from: 551 * 552 * GTF Spreadsheet by Andy Morrish (1/5/97) 553 * available at http://www.vesa.org 554 * 555 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 556 * What I have done is to translate it by using integer calculation. 557 * I also refer to the function of fb_get_mode in the file of 558 * drivers/video/fbmon.c 559 * 560 * Standard GTF parameters:: 561 * 562 * M = 600 563 * C = 40 564 * K = 128 565 * J = 20 566 * 567 * Returns: 568 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 569 * The display mode object is allocated with drm_mode_create(). Returns NULL 570 * when no mode could be allocated. 571 */ 572 struct drm_display_mode * 573 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 574 bool interlaced, int margins) 575 { 576 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 577 interlaced, margins, 578 600, 40 * 2, 128, 20 * 2); 579 } 580 EXPORT_SYMBOL(drm_gtf_mode); 581 582 #ifdef CONFIG_VIDEOMODE_HELPERS 583 /** 584 * drm_display_mode_from_videomode - fill in @dmode using @vm, 585 * @vm: videomode structure to use as source 586 * @dmode: drm_display_mode structure to use as destination 587 * 588 * Fills out @dmode using the display mode specified in @vm. 589 */ 590 void drm_display_mode_from_videomode(const struct videomode *vm, 591 struct drm_display_mode *dmode) 592 { 593 dmode->hdisplay = vm->hactive; 594 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 595 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 596 dmode->htotal = dmode->hsync_end + vm->hback_porch; 597 598 dmode->vdisplay = vm->vactive; 599 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 600 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 601 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 602 603 dmode->clock = vm->pixelclock / 1000; 604 605 dmode->flags = 0; 606 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 607 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 608 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 609 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 610 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 611 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 612 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 613 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 614 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 615 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 616 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 617 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 618 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 619 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 620 drm_mode_set_name(dmode); 621 } 622 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 623 624 /** 625 * drm_display_mode_to_videomode - fill in @vm using @dmode, 626 * @dmode: drm_display_mode structure to use as source 627 * @vm: videomode structure to use as destination 628 * 629 * Fills out @vm using the display mode specified in @dmode. 630 */ 631 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 632 struct videomode *vm) 633 { 634 vm->hactive = dmode->hdisplay; 635 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 636 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 637 vm->hback_porch = dmode->htotal - dmode->hsync_end; 638 639 vm->vactive = dmode->vdisplay; 640 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 641 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 642 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 643 644 vm->pixelclock = dmode->clock * 1000; 645 646 vm->flags = 0; 647 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 648 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 649 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 650 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 651 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 652 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 653 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 654 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 655 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 656 vm->flags |= DISPLAY_FLAGS_INTERLACED; 657 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 658 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 659 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 660 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 661 } 662 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 663 664 /** 665 * drm_bus_flags_from_videomode - extract information about pixelclk and 666 * DE polarity from videomode and store it in a separate variable 667 * @vm: videomode structure to use 668 * @bus_flags: information about pixelclk and DE polarity will be stored here 669 * 670 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH) and DRM_BUS_FLAG_PIXDATA_(POS|NEG)EDGE 671 * in @bus_flags according to DISPLAY_FLAGS found in @vm 672 */ 673 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) 674 { 675 *bus_flags = 0; 676 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) 677 *bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE; 678 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 679 *bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE; 680 681 if (vm->flags & DISPLAY_FLAGS_DE_LOW) 682 *bus_flags |= DRM_BUS_FLAG_DE_LOW; 683 if (vm->flags & DISPLAY_FLAGS_DE_HIGH) 684 *bus_flags |= DRM_BUS_FLAG_DE_HIGH; 685 } 686 EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); 687 688 #ifdef CONFIG_OF 689 /** 690 * of_get_drm_display_mode - get a drm_display_mode from devicetree 691 * @np: device_node with the timing specification 692 * @dmode: will be set to the return value 693 * @bus_flags: information about pixelclk and DE polarity 694 * @index: index into the list of display timings in devicetree 695 * 696 * This function is expensive and should only be used, if only one mode is to be 697 * read from DT. To get multiple modes start with of_get_display_timings and 698 * work with that instead. 699 * 700 * Returns: 701 * 0 on success, a negative errno code when no of videomode node was found. 702 */ 703 int of_get_drm_display_mode(struct device_node *np, 704 struct drm_display_mode *dmode, u32 *bus_flags, 705 int index) 706 { 707 struct videomode vm; 708 int ret; 709 710 ret = of_get_videomode(np, &vm, index); 711 if (ret) 712 return ret; 713 714 drm_display_mode_from_videomode(&vm, dmode); 715 if (bus_flags) 716 drm_bus_flags_from_videomode(&vm, bus_flags); 717 718 pr_debug("%s: got %dx%d display mode from %s\n", 719 of_node_full_name(np), vm.hactive, vm.vactive, np->name); 720 drm_mode_debug_printmodeline(dmode); 721 722 return 0; 723 } 724 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 725 #endif /* CONFIG_OF */ 726 #endif /* CONFIG_VIDEOMODE_HELPERS */ 727 728 /** 729 * drm_mode_set_name - set the name on a mode 730 * @mode: name will be set in this mode 731 * 732 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 733 * with an optional 'i' suffix for interlaced modes. 734 */ 735 void drm_mode_set_name(struct drm_display_mode *mode) 736 { 737 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 738 739 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 740 mode->hdisplay, mode->vdisplay, 741 interlaced ? "i" : ""); 742 } 743 EXPORT_SYMBOL(drm_mode_set_name); 744 745 /** 746 * drm_mode_hsync - get the hsync of a mode 747 * @mode: mode 748 * 749 * Returns: 750 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the 751 * value first if it is not yet set. 752 */ 753 int drm_mode_hsync(const struct drm_display_mode *mode) 754 { 755 unsigned int calc_val; 756 757 if (mode->hsync) 758 return mode->hsync; 759 760 if (mode->htotal < 0) 761 return 0; 762 763 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ 764 calc_val += 500; /* round to 1000Hz */ 765 calc_val /= 1000; /* truncate to kHz */ 766 767 return calc_val; 768 } 769 EXPORT_SYMBOL(drm_mode_hsync); 770 771 /** 772 * drm_mode_vrefresh - get the vrefresh of a mode 773 * @mode: mode 774 * 775 * Returns: 776 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 777 * value first if it is not yet set. 778 */ 779 int drm_mode_vrefresh(const struct drm_display_mode *mode) 780 { 781 int refresh = 0; 782 unsigned int calc_val; 783 784 if (mode->vrefresh > 0) 785 refresh = mode->vrefresh; 786 else if (mode->htotal > 0 && mode->vtotal > 0) { 787 int vtotal; 788 vtotal = mode->vtotal; 789 /* work out vrefresh the value will be x1000 */ 790 calc_val = (mode->clock * 1000); 791 calc_val /= mode->htotal; 792 refresh = (calc_val + vtotal / 2) / vtotal; 793 794 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 795 refresh *= 2; 796 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 797 refresh /= 2; 798 if (mode->vscan > 1) 799 refresh /= mode->vscan; 800 } 801 return refresh; 802 } 803 EXPORT_SYMBOL(drm_mode_vrefresh); 804 805 /** 806 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 807 * @p: mode 808 * @adjust_flags: a combination of adjustment flags 809 * 810 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 811 * 812 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 813 * interlaced modes. 814 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 815 * buffers containing two eyes (only adjust the timings when needed, eg. for 816 * "frame packing" or "side by side full"). 817 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 818 * be performed for doublescan and vscan > 1 modes respectively. 819 */ 820 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 821 { 822 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) 823 return; 824 825 p->crtc_clock = p->clock; 826 p->crtc_hdisplay = p->hdisplay; 827 p->crtc_hsync_start = p->hsync_start; 828 p->crtc_hsync_end = p->hsync_end; 829 p->crtc_htotal = p->htotal; 830 p->crtc_hskew = p->hskew; 831 p->crtc_vdisplay = p->vdisplay; 832 p->crtc_vsync_start = p->vsync_start; 833 p->crtc_vsync_end = p->vsync_end; 834 p->crtc_vtotal = p->vtotal; 835 836 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 837 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 838 p->crtc_vdisplay /= 2; 839 p->crtc_vsync_start /= 2; 840 p->crtc_vsync_end /= 2; 841 p->crtc_vtotal /= 2; 842 } 843 } 844 845 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 846 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 847 p->crtc_vdisplay *= 2; 848 p->crtc_vsync_start *= 2; 849 p->crtc_vsync_end *= 2; 850 p->crtc_vtotal *= 2; 851 } 852 } 853 854 if (!(adjust_flags & CRTC_NO_VSCAN)) { 855 if (p->vscan > 1) { 856 p->crtc_vdisplay *= p->vscan; 857 p->crtc_vsync_start *= p->vscan; 858 p->crtc_vsync_end *= p->vscan; 859 p->crtc_vtotal *= p->vscan; 860 } 861 } 862 863 if (adjust_flags & CRTC_STEREO_DOUBLE) { 864 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 865 866 switch (layout) { 867 case DRM_MODE_FLAG_3D_FRAME_PACKING: 868 p->crtc_clock *= 2; 869 p->crtc_vdisplay += p->crtc_vtotal; 870 p->crtc_vsync_start += p->crtc_vtotal; 871 p->crtc_vsync_end += p->crtc_vtotal; 872 p->crtc_vtotal += p->crtc_vtotal; 873 break; 874 } 875 } 876 877 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 878 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 879 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 880 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 881 } 882 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 883 884 /** 885 * drm_mode_copy - copy the mode 886 * @dst: mode to overwrite 887 * @src: mode to copy 888 * 889 * Copy an existing mode into another mode, preserving the object id and 890 * list head of the destination mode. 891 */ 892 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 893 { 894 int id = dst->base.id; 895 struct list_head head = dst->head; 896 897 *dst = *src; 898 dst->base.id = id; 899 dst->head = head; 900 } 901 EXPORT_SYMBOL(drm_mode_copy); 902 903 /** 904 * drm_mode_duplicate - allocate and duplicate an existing mode 905 * @dev: drm_device to allocate the duplicated mode for 906 * @mode: mode to duplicate 907 * 908 * Just allocate a new mode, copy the existing mode into it, and return 909 * a pointer to it. Used to create new instances of established modes. 910 * 911 * Returns: 912 * Pointer to duplicated mode on success, NULL on error. 913 */ 914 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 915 const struct drm_display_mode *mode) 916 { 917 struct drm_display_mode *nmode; 918 919 nmode = drm_mode_create(dev); 920 if (!nmode) 921 return NULL; 922 923 drm_mode_copy(nmode, mode); 924 925 return nmode; 926 } 927 EXPORT_SYMBOL(drm_mode_duplicate); 928 929 /** 930 * drm_mode_equal - test modes for equality 931 * @mode1: first mode 932 * @mode2: second mode 933 * 934 * Check to see if @mode1 and @mode2 are equivalent. 935 * 936 * Returns: 937 * True if the modes are equal, false otherwise. 938 */ 939 bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 940 { 941 if (!mode1 && !mode2) 942 return true; 943 944 if (!mode1 || !mode2) 945 return false; 946 947 /* do clock check convert to PICOS so fb modes get matched 948 * the same */ 949 if (mode1->clock && mode2->clock) { 950 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) 951 return false; 952 } else if (mode1->clock != mode2->clock) 953 return false; 954 955 return drm_mode_equal_no_clocks(mode1, mode2); 956 } 957 EXPORT_SYMBOL(drm_mode_equal); 958 959 /** 960 * drm_mode_equal_no_clocks - test modes for equality 961 * @mode1: first mode 962 * @mode2: second mode 963 * 964 * Check to see if @mode1 and @mode2 are equivalent, but 965 * don't check the pixel clocks. 966 * 967 * Returns: 968 * True if the modes are equal, false otherwise. 969 */ 970 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) 971 { 972 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) != 973 (mode2->flags & DRM_MODE_FLAG_3D_MASK)) 974 return false; 975 976 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2); 977 } 978 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 979 980 /** 981 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 982 * @mode1: first mode 983 * @mode2: second mode 984 * 985 * Check to see if @mode1 and @mode2 are equivalent, but 986 * don't check the pixel clocks nor the stereo layout. 987 * 988 * Returns: 989 * True if the modes are equal, false otherwise. 990 */ 991 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 992 const struct drm_display_mode *mode2) 993 { 994 if (mode1->hdisplay == mode2->hdisplay && 995 mode1->hsync_start == mode2->hsync_start && 996 mode1->hsync_end == mode2->hsync_end && 997 mode1->htotal == mode2->htotal && 998 mode1->hskew == mode2->hskew && 999 mode1->vdisplay == mode2->vdisplay && 1000 mode1->vsync_start == mode2->vsync_start && 1001 mode1->vsync_end == mode2->vsync_end && 1002 mode1->vtotal == mode2->vtotal && 1003 mode1->vscan == mode2->vscan && 1004 mode1->picture_aspect_ratio == mode2->picture_aspect_ratio && 1005 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 1006 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK)) 1007 return true; 1008 1009 return false; 1010 } 1011 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1012 1013 /** 1014 * drm_mode_validate_basic - make sure the mode is somewhat sane 1015 * @mode: mode to check 1016 * 1017 * Check that the mode timings are at least somewhat reasonable. 1018 * Any hardware specific limits are left up for each driver to check. 1019 * 1020 * Returns: 1021 * The mode status 1022 */ 1023 enum drm_mode_status 1024 drm_mode_validate_basic(const struct drm_display_mode *mode) 1025 { 1026 if (mode->clock == 0) 1027 return MODE_CLOCK_LOW; 1028 1029 if (mode->hdisplay == 0 || 1030 mode->hsync_start < mode->hdisplay || 1031 mode->hsync_end < mode->hsync_start || 1032 mode->htotal < mode->hsync_end) 1033 return MODE_H_ILLEGAL; 1034 1035 if (mode->vdisplay == 0 || 1036 mode->vsync_start < mode->vdisplay || 1037 mode->vsync_end < mode->vsync_start || 1038 mode->vtotal < mode->vsync_end) 1039 return MODE_V_ILLEGAL; 1040 1041 return MODE_OK; 1042 } 1043 EXPORT_SYMBOL(drm_mode_validate_basic); 1044 1045 /** 1046 * drm_mode_validate_size - make sure modes adhere to size constraints 1047 * @mode: mode to check 1048 * @maxX: maximum width 1049 * @maxY: maximum height 1050 * 1051 * This function is a helper which can be used to validate modes against size 1052 * limitations of the DRM device/connector. If a mode is too big its status 1053 * member is updated with the appropriate validation failure code. The list 1054 * itself is not changed. 1055 * 1056 * Returns: 1057 * The mode status 1058 */ 1059 enum drm_mode_status 1060 drm_mode_validate_size(const struct drm_display_mode *mode, 1061 int maxX, int maxY) 1062 { 1063 if (maxX > 0 && mode->hdisplay > maxX) 1064 return MODE_VIRTUAL_X; 1065 1066 if (maxY > 0 && mode->vdisplay > maxY) 1067 return MODE_VIRTUAL_Y; 1068 1069 return MODE_OK; 1070 } 1071 EXPORT_SYMBOL(drm_mode_validate_size); 1072 1073 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1074 1075 static const char * const drm_mode_status_names[] = { 1076 MODE_STATUS(OK), 1077 MODE_STATUS(HSYNC), 1078 MODE_STATUS(VSYNC), 1079 MODE_STATUS(H_ILLEGAL), 1080 MODE_STATUS(V_ILLEGAL), 1081 MODE_STATUS(BAD_WIDTH), 1082 MODE_STATUS(NOMODE), 1083 MODE_STATUS(NO_INTERLACE), 1084 MODE_STATUS(NO_DBLESCAN), 1085 MODE_STATUS(NO_VSCAN), 1086 MODE_STATUS(MEM), 1087 MODE_STATUS(VIRTUAL_X), 1088 MODE_STATUS(VIRTUAL_Y), 1089 MODE_STATUS(MEM_VIRT), 1090 MODE_STATUS(NOCLOCK), 1091 MODE_STATUS(CLOCK_HIGH), 1092 MODE_STATUS(CLOCK_LOW), 1093 MODE_STATUS(CLOCK_RANGE), 1094 MODE_STATUS(BAD_HVALUE), 1095 MODE_STATUS(BAD_VVALUE), 1096 MODE_STATUS(BAD_VSCAN), 1097 MODE_STATUS(HSYNC_NARROW), 1098 MODE_STATUS(HSYNC_WIDE), 1099 MODE_STATUS(HBLANK_NARROW), 1100 MODE_STATUS(HBLANK_WIDE), 1101 MODE_STATUS(VSYNC_NARROW), 1102 MODE_STATUS(VSYNC_WIDE), 1103 MODE_STATUS(VBLANK_NARROW), 1104 MODE_STATUS(VBLANK_WIDE), 1105 MODE_STATUS(PANEL), 1106 MODE_STATUS(INTERLACE_WIDTH), 1107 MODE_STATUS(ONE_WIDTH), 1108 MODE_STATUS(ONE_HEIGHT), 1109 MODE_STATUS(ONE_SIZE), 1110 MODE_STATUS(NO_REDUCED), 1111 MODE_STATUS(NO_STEREO), 1112 MODE_STATUS(STALE), 1113 MODE_STATUS(BAD), 1114 MODE_STATUS(ERROR), 1115 }; 1116 1117 #undef MODE_STATUS 1118 1119 static const char *drm_get_mode_status_name(enum drm_mode_status status) 1120 { 1121 int index = status + 3; 1122 1123 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1124 return ""; 1125 1126 return drm_mode_status_names[index]; 1127 } 1128 1129 /** 1130 * drm_mode_prune_invalid - remove invalid modes from mode list 1131 * @dev: DRM device 1132 * @mode_list: list of modes to check 1133 * @verbose: be verbose about it 1134 * 1135 * This helper function can be used to prune a display mode list after 1136 * validation has been completed. All modes who's status is not MODE_OK will be 1137 * removed from the list, and if @verbose the status code and mode name is also 1138 * printed to dmesg. 1139 */ 1140 void drm_mode_prune_invalid(struct drm_device *dev, 1141 struct list_head *mode_list, bool verbose) 1142 { 1143 struct drm_display_mode *mode, *t; 1144 1145 list_for_each_entry_safe(mode, t, mode_list, head) { 1146 if (mode->status != MODE_OK) { 1147 list_del(&mode->head); 1148 if (verbose) { 1149 drm_mode_debug_printmodeline(mode); 1150 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1151 mode->name, 1152 drm_get_mode_status_name(mode->status)); 1153 } 1154 drm_mode_destroy(dev, mode); 1155 } 1156 } 1157 } 1158 EXPORT_SYMBOL(drm_mode_prune_invalid); 1159 1160 /** 1161 * drm_mode_compare - compare modes for favorability 1162 * @priv: unused 1163 * @lh_a: list_head for first mode 1164 * @lh_b: list_head for second mode 1165 * 1166 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1167 * which is better. 1168 * 1169 * Returns: 1170 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1171 * positive if @lh_b is better than @lh_a. 1172 */ 1173 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) 1174 { 1175 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1176 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1177 int diff; 1178 1179 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1180 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1181 if (diff) 1182 return diff; 1183 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1184 if (diff) 1185 return diff; 1186 1187 diff = b->vrefresh - a->vrefresh; 1188 if (diff) 1189 return diff; 1190 1191 diff = b->clock - a->clock; 1192 return diff; 1193 } 1194 1195 /** 1196 * drm_mode_sort - sort mode list 1197 * @mode_list: list of drm_display_mode structures to sort 1198 * 1199 * Sort @mode_list by favorability, moving good modes to the head of the list. 1200 */ 1201 void drm_mode_sort(struct list_head *mode_list) 1202 { 1203 list_sort(NULL, mode_list, drm_mode_compare); 1204 } 1205 EXPORT_SYMBOL(drm_mode_sort); 1206 1207 /** 1208 * drm_mode_connector_list_update - update the mode list for the connector 1209 * @connector: the connector to update 1210 * 1211 * This moves the modes from the @connector probed_modes list 1212 * to the actual mode list. It compares the probed mode against the current 1213 * list and only adds different/new modes. 1214 * 1215 * This is just a helper functions doesn't validate any modes itself and also 1216 * doesn't prune any invalid modes. Callers need to do that themselves. 1217 */ 1218 void drm_mode_connector_list_update(struct drm_connector *connector) 1219 { 1220 struct drm_display_mode *pmode, *pt; 1221 1222 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1223 1224 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1225 struct drm_display_mode *mode; 1226 bool found_it = false; 1227 1228 /* go through current modes checking for the new probed mode */ 1229 list_for_each_entry(mode, &connector->modes, head) { 1230 if (!drm_mode_equal(pmode, mode)) 1231 continue; 1232 1233 found_it = true; 1234 1235 /* 1236 * If the old matching mode is stale (ie. left over 1237 * from a previous probe) just replace it outright. 1238 * Otherwise just merge the type bits between all 1239 * equal probed modes. 1240 * 1241 * If two probed modes are considered equal, pick the 1242 * actual timings from the one that's marked as 1243 * preferred (in case the match isn't 100%). If 1244 * multiple or zero preferred modes are present, favor 1245 * the mode added to the probed_modes list first. 1246 */ 1247 if (mode->status == MODE_STALE) { 1248 drm_mode_copy(mode, pmode); 1249 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1250 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1251 pmode->type |= mode->type; 1252 drm_mode_copy(mode, pmode); 1253 } else { 1254 mode->type |= pmode->type; 1255 } 1256 1257 list_del(&pmode->head); 1258 drm_mode_destroy(connector->dev, pmode); 1259 break; 1260 } 1261 1262 if (!found_it) { 1263 list_move_tail(&pmode->head, &connector->modes); 1264 } 1265 } 1266 } 1267 EXPORT_SYMBOL(drm_mode_connector_list_update); 1268 1269 /** 1270 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1271 * @mode_option: optional per connector mode option 1272 * @connector: connector to parse modeline for 1273 * @mode: preallocated drm_cmdline_mode structure to fill out 1274 * 1275 * This parses @mode_option command line modeline for modes and options to 1276 * configure the connector. If @mode_option is NULL the default command line 1277 * modeline in fb_mode_option will be parsed instead. 1278 * 1279 * This uses the same parameters as the fb modedb.c, except for an extra 1280 * force-enable, force-enable-digital and force-disable bit at the end: 1281 * 1282 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1283 * 1284 * The intermediate drm_cmdline_mode structure is required to store additional 1285 * options from the command line modline like the force-enable/disable flag. 1286 * 1287 * Returns: 1288 * True if a valid modeline has been parsed, false otherwise. 1289 */ 1290 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1291 struct drm_connector *connector, 1292 struct drm_cmdline_mode *mode) 1293 { 1294 const char *name; 1295 unsigned int namelen; 1296 bool res_specified = false, bpp_specified = false, refresh_specified = false; 1297 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; 1298 bool yres_specified = false, cvt = false, rb = false; 1299 bool interlace = false, margins = false, was_digit = false; 1300 int i; 1301 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; 1302 1303 #ifdef CONFIG_FB 1304 if (!mode_option) 1305 mode_option = fb_mode_option; 1306 #endif 1307 1308 if (!mode_option) { 1309 mode->specified = false; 1310 return false; 1311 } 1312 1313 name = mode_option; 1314 namelen = strlen(name); 1315 for (i = namelen-1; i >= 0; i--) { 1316 switch (name[i]) { 1317 case '@': 1318 if (!refresh_specified && !bpp_specified && 1319 !yres_specified && !cvt && !rb && was_digit) { 1320 refresh = simple_strtol(&name[i+1], NULL, 10); 1321 refresh_specified = true; 1322 was_digit = false; 1323 } else 1324 goto done; 1325 break; 1326 case '-': 1327 if (!bpp_specified && !yres_specified && !cvt && 1328 !rb && was_digit) { 1329 bpp = simple_strtol(&name[i+1], NULL, 10); 1330 bpp_specified = true; 1331 was_digit = false; 1332 } else 1333 goto done; 1334 break; 1335 case 'x': 1336 if (!yres_specified && was_digit) { 1337 yres = simple_strtol(&name[i+1], NULL, 10); 1338 yres_specified = true; 1339 was_digit = false; 1340 } else 1341 goto done; 1342 break; 1343 case '0' ... '9': 1344 was_digit = true; 1345 break; 1346 case 'M': 1347 if (yres_specified || cvt || was_digit) 1348 goto done; 1349 cvt = true; 1350 break; 1351 case 'R': 1352 if (yres_specified || cvt || rb || was_digit) 1353 goto done; 1354 rb = true; 1355 break; 1356 case 'm': 1357 if (cvt || yres_specified || was_digit) 1358 goto done; 1359 margins = true; 1360 break; 1361 case 'i': 1362 if (cvt || yres_specified || was_digit) 1363 goto done; 1364 interlace = true; 1365 break; 1366 case 'e': 1367 if (yres_specified || bpp_specified || refresh_specified || 1368 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1369 goto done; 1370 1371 force = DRM_FORCE_ON; 1372 break; 1373 case 'D': 1374 if (yres_specified || bpp_specified || refresh_specified || 1375 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1376 goto done; 1377 1378 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1379 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1380 force = DRM_FORCE_ON; 1381 else 1382 force = DRM_FORCE_ON_DIGITAL; 1383 break; 1384 case 'd': 1385 if (yres_specified || bpp_specified || refresh_specified || 1386 was_digit || (force != DRM_FORCE_UNSPECIFIED)) 1387 goto done; 1388 1389 force = DRM_FORCE_OFF; 1390 break; 1391 default: 1392 goto done; 1393 } 1394 } 1395 1396 if (i < 0 && yres_specified) { 1397 char *ch; 1398 xres = simple_strtol(name, &ch, 10); 1399 if ((ch != NULL) && (*ch == 'x')) 1400 res_specified = true; 1401 else 1402 i = ch - name; 1403 } else if (!yres_specified && was_digit) { 1404 /* catch mode that begins with digits but has no 'x' */ 1405 i = 0; 1406 } 1407 done: 1408 if (i >= 0) { 1409 pr_warn("[drm] parse error at position %i in video mode '%s'\n", 1410 i, name); 1411 mode->specified = false; 1412 return false; 1413 } 1414 1415 if (res_specified) { 1416 mode->specified = true; 1417 mode->xres = xres; 1418 mode->yres = yres; 1419 } 1420 1421 if (refresh_specified) { 1422 mode->refresh_specified = true; 1423 mode->refresh = refresh; 1424 } 1425 1426 if (bpp_specified) { 1427 mode->bpp_specified = true; 1428 mode->bpp = bpp; 1429 } 1430 mode->rb = rb; 1431 mode->cvt = cvt; 1432 mode->interlace = interlace; 1433 mode->margins = margins; 1434 mode->force = force; 1435 1436 return true; 1437 } 1438 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1439 1440 /** 1441 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1442 * @dev: DRM device to create the new mode for 1443 * @cmd: input command line modeline 1444 * 1445 * Returns: 1446 * Pointer to converted mode on success, NULL on error. 1447 */ 1448 struct drm_display_mode * 1449 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1450 struct drm_cmdline_mode *cmd) 1451 { 1452 struct drm_display_mode *mode; 1453 1454 if (cmd->cvt) 1455 mode = drm_cvt_mode(dev, 1456 cmd->xres, cmd->yres, 1457 cmd->refresh_specified ? cmd->refresh : 60, 1458 cmd->rb, cmd->interlace, 1459 cmd->margins); 1460 else 1461 mode = drm_gtf_mode(dev, 1462 cmd->xres, cmd->yres, 1463 cmd->refresh_specified ? cmd->refresh : 60, 1464 cmd->interlace, 1465 cmd->margins); 1466 if (!mode) 1467 return NULL; 1468 1469 mode->type |= DRM_MODE_TYPE_USERDEF; 1470 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1471 return mode; 1472 } 1473 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1474 1475 /** 1476 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1477 * @out: drm_mode_modeinfo struct to return to the user 1478 * @in: drm_display_mode to use 1479 * 1480 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1481 * the user. 1482 */ 1483 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1484 const struct drm_display_mode *in) 1485 { 1486 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1487 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1488 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1489 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1490 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1491 "timing values too large for mode info\n"); 1492 1493 out->clock = in->clock; 1494 out->hdisplay = in->hdisplay; 1495 out->hsync_start = in->hsync_start; 1496 out->hsync_end = in->hsync_end; 1497 out->htotal = in->htotal; 1498 out->hskew = in->hskew; 1499 out->vdisplay = in->vdisplay; 1500 out->vsync_start = in->vsync_start; 1501 out->vsync_end = in->vsync_end; 1502 out->vtotal = in->vtotal; 1503 out->vscan = in->vscan; 1504 out->vrefresh = in->vrefresh; 1505 out->flags = in->flags; 1506 out->type = in->type; 1507 out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 1508 1509 switch (in->picture_aspect_ratio) { 1510 case HDMI_PICTURE_ASPECT_4_3: 1511 out->flags |= DRM_MODE_FLAG_PIC_AR_4_3; 1512 break; 1513 case HDMI_PICTURE_ASPECT_16_9: 1514 out->flags |= DRM_MODE_FLAG_PIC_AR_16_9; 1515 break; 1516 case HDMI_PICTURE_ASPECT_64_27: 1517 out->flags |= DRM_MODE_FLAG_PIC_AR_64_27; 1518 break; 1519 case DRM_MODE_PICTURE_ASPECT_256_135: 1520 out->flags |= DRM_MODE_FLAG_PIC_AR_256_135; 1521 break; 1522 case HDMI_PICTURE_ASPECT_RESERVED: 1523 default: 1524 out->flags |= DRM_MODE_FLAG_PIC_AR_NONE; 1525 break; 1526 } 1527 1528 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1529 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1530 } 1531 1532 /** 1533 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1534 * @out: drm_display_mode to return to the user 1535 * @in: drm_mode_modeinfo to use 1536 * 1537 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1538 * the caller. 1539 * 1540 * Returns: 1541 * Zero on success, negative errno on failure. 1542 */ 1543 int drm_mode_convert_umode(struct drm_display_mode *out, 1544 const struct drm_mode_modeinfo *in) 1545 { 1546 int ret = -EINVAL; 1547 1548 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) { 1549 ret = -ERANGE; 1550 goto out; 1551 } 1552 1553 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1554 goto out; 1555 1556 out->clock = in->clock; 1557 out->hdisplay = in->hdisplay; 1558 out->hsync_start = in->hsync_start; 1559 out->hsync_end = in->hsync_end; 1560 out->htotal = in->htotal; 1561 out->hskew = in->hskew; 1562 out->vdisplay = in->vdisplay; 1563 out->vsync_start = in->vsync_start; 1564 out->vsync_end = in->vsync_end; 1565 out->vtotal = in->vtotal; 1566 out->vscan = in->vscan; 1567 out->vrefresh = in->vrefresh; 1568 out->flags = in->flags; 1569 out->type = in->type; 1570 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1571 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1572 1573 /* Clearing picture aspect ratio bits from out flags */ 1574 out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 1575 1576 switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) { 1577 case DRM_MODE_FLAG_PIC_AR_4_3: 1578 out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_4_3; 1579 break; 1580 case DRM_MODE_FLAG_PIC_AR_16_9: 1581 out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_16_9; 1582 break; 1583 case DRM_MODE_FLAG_PIC_AR_64_27: 1584 out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_64_27; 1585 break; 1586 case DRM_MODE_FLAG_PIC_AR_256_135: 1587 out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_256_135; 1588 break; 1589 default: 1590 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE; 1591 break; 1592 } 1593 1594 out->status = drm_mode_validate_basic(out); 1595 if (out->status != MODE_OK) 1596 goto out; 1597 1598 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 1599 1600 ret = 0; 1601 1602 out: 1603 return ret; 1604 } 1605