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/ctype.h> 34 #include <linux/list.h> 35 #include <linux/list_sort.h> 36 #include <linux/export.h> 37 38 #include <video/of_videomode.h> 39 #include <video/videomode.h> 40 41 #include <drm/drm_crtc.h> 42 #include <drm/drm_device.h> 43 #include <drm/drm_modes.h> 44 #include <drm/drm_print.h> 45 46 #include "drm_crtc_internal.h" 47 48 /** 49 * drm_mode_debug_printmodeline - print a mode to dmesg 50 * @mode: mode to print 51 * 52 * Describe @mode using DRM_DEBUG. 53 */ 54 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) 55 { 56 DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 57 } 58 EXPORT_SYMBOL(drm_mode_debug_printmodeline); 59 60 /** 61 * drm_mode_create - create a new display mode 62 * @dev: DRM device 63 * 64 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it 65 * and return it. 66 * 67 * Returns: 68 * Pointer to new mode on success, NULL on error. 69 */ 70 struct drm_display_mode *drm_mode_create(struct drm_device *dev) 71 { 72 struct drm_display_mode *nmode; 73 74 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); 75 if (!nmode) 76 return NULL; 77 78 return nmode; 79 } 80 EXPORT_SYMBOL(drm_mode_create); 81 82 /** 83 * drm_mode_destroy - remove a mode 84 * @dev: DRM device 85 * @mode: mode to remove 86 * 87 * Release @mode's unique ID, then free it @mode structure itself using kfree. 88 */ 89 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) 90 { 91 if (!mode) 92 return; 93 94 kfree(mode); 95 } 96 EXPORT_SYMBOL(drm_mode_destroy); 97 98 /** 99 * drm_mode_probed_add - add a mode to a connector's probed_mode list 100 * @connector: connector the new mode 101 * @mode: mode data 102 * 103 * Add @mode to @connector's probed_mode list for later use. This list should 104 * then in a second step get filtered and all the modes actually supported by 105 * the hardware moved to the @connector's modes list. 106 */ 107 void drm_mode_probed_add(struct drm_connector *connector, 108 struct drm_display_mode *mode) 109 { 110 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 111 112 list_add_tail(&mode->head, &connector->probed_modes); 113 } 114 EXPORT_SYMBOL(drm_mode_probed_add); 115 116 /** 117 * drm_cvt_mode -create a modeline based on the CVT algorithm 118 * @dev: drm device 119 * @hdisplay: hdisplay size 120 * @vdisplay: vdisplay size 121 * @vrefresh: vrefresh rate 122 * @reduced: whether to use reduced blanking 123 * @interlaced: whether to compute an interlaced mode 124 * @margins: whether to add margins (borders) 125 * 126 * This function is called to generate the modeline based on CVT algorithm 127 * according to the hdisplay, vdisplay, vrefresh. 128 * It is based from the VESA(TM) Coordinated Video Timing Generator by 129 * Graham Loveridge April 9, 2003 available at 130 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 131 * 132 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 133 * What I have done is to translate it by using integer calculation. 134 * 135 * Returns: 136 * The modeline based on the CVT algorithm stored in a drm_display_mode object. 137 * The display mode object is allocated with drm_mode_create(). Returns NULL 138 * when no mode could be allocated. 139 */ 140 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 141 int vdisplay, int vrefresh, 142 bool reduced, bool interlaced, bool margins) 143 { 144 #define HV_FACTOR 1000 145 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 146 #define CVT_MARGIN_PERCENTAGE 18 147 /* 2) character cell horizontal granularity (pixels) - default 8 */ 148 #define CVT_H_GRANULARITY 8 149 /* 3) Minimum vertical porch (lines) - default 3 */ 150 #define CVT_MIN_V_PORCH 3 151 /* 4) Minimum number of vertical back porch lines - default 6 */ 152 #define CVT_MIN_V_BPORCH 6 153 /* Pixel Clock step (kHz) */ 154 #define CVT_CLOCK_STEP 250 155 struct drm_display_mode *drm_mode; 156 unsigned int vfieldrate, hperiod; 157 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 158 int interlace; 159 u64 tmp; 160 161 if (!hdisplay || !vdisplay) 162 return NULL; 163 164 /* allocate the drm_display_mode structure. If failure, we will 165 * return directly 166 */ 167 drm_mode = drm_mode_create(dev); 168 if (!drm_mode) 169 return NULL; 170 171 /* the CVT default refresh rate is 60Hz */ 172 if (!vrefresh) 173 vrefresh = 60; 174 175 /* the required field fresh rate */ 176 if (interlaced) 177 vfieldrate = vrefresh * 2; 178 else 179 vfieldrate = vrefresh; 180 181 /* horizontal pixels */ 182 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 183 184 /* determine the left&right borders */ 185 hmargin = 0; 186 if (margins) { 187 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 188 hmargin -= hmargin % CVT_H_GRANULARITY; 189 } 190 /* find the total active pixels */ 191 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 192 193 /* find the number of lines per field */ 194 if (interlaced) 195 vdisplay_rnd = vdisplay / 2; 196 else 197 vdisplay_rnd = vdisplay; 198 199 /* find the top & bottom borders */ 200 vmargin = 0; 201 if (margins) 202 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 203 204 drm_mode->vdisplay = vdisplay + 2 * vmargin; 205 206 /* Interlaced */ 207 if (interlaced) 208 interlace = 1; 209 else 210 interlace = 0; 211 212 /* Determine VSync Width from aspect ratio */ 213 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 214 vsync = 4; 215 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 216 vsync = 5; 217 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 218 vsync = 6; 219 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 220 vsync = 7; 221 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 222 vsync = 7; 223 else /* custom */ 224 vsync = 10; 225 226 if (!reduced) { 227 /* simplify the GTF calculation */ 228 /* 4) Minimum time of vertical sync + back porch interval (µs) 229 * default 550.0 230 */ 231 int tmp1, tmp2; 232 #define CVT_MIN_VSYNC_BP 550 233 /* 3) Nominal HSync width (% of line period) - default 8 */ 234 #define CVT_HSYNC_PERCENTAGE 8 235 unsigned int hblank_percentage; 236 int vsyncandback_porch, vback_porch, hblank; 237 238 /* estimated the horizontal period */ 239 tmp1 = HV_FACTOR * 1000000 - 240 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 241 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 242 interlace; 243 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 244 245 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 246 /* 9. Find number of lines in sync + backporch */ 247 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 248 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 249 else 250 vsyncandback_porch = tmp1; 251 /* 10. Find number of lines in back porch */ 252 vback_porch = vsyncandback_porch - vsync; 253 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 254 vsyncandback_porch + CVT_MIN_V_PORCH; 255 /* 5) Definition of Horizontal blanking time limitation */ 256 /* Gradient (%/kHz) - default 600 */ 257 #define CVT_M_FACTOR 600 258 /* Offset (%) - default 40 */ 259 #define CVT_C_FACTOR 40 260 /* Blanking time scaling factor - default 128 */ 261 #define CVT_K_FACTOR 128 262 /* Scaling factor weighting - default 20 */ 263 #define CVT_J_FACTOR 20 264 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 265 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 266 CVT_J_FACTOR) 267 /* 12. Find ideal blanking duty cycle from formula */ 268 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 269 hperiod / 1000; 270 /* 13. Blanking time */ 271 if (hblank_percentage < 20 * HV_FACTOR) 272 hblank_percentage = 20 * HV_FACTOR; 273 hblank = drm_mode->hdisplay * hblank_percentage / 274 (100 * HV_FACTOR - hblank_percentage); 275 hblank -= hblank % (2 * CVT_H_GRANULARITY); 276 /* 14. find the total pixels per line */ 277 drm_mode->htotal = drm_mode->hdisplay + hblank; 278 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 279 drm_mode->hsync_start = drm_mode->hsync_end - 280 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 281 drm_mode->hsync_start += CVT_H_GRANULARITY - 282 drm_mode->hsync_start % CVT_H_GRANULARITY; 283 /* fill the Vsync values */ 284 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 285 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 286 } else { 287 /* Reduced blanking */ 288 /* Minimum vertical blanking interval time (µs)- default 460 */ 289 #define CVT_RB_MIN_VBLANK 460 290 /* Fixed number of clocks for horizontal sync */ 291 #define CVT_RB_H_SYNC 32 292 /* Fixed number of clocks for horizontal blanking */ 293 #define CVT_RB_H_BLANK 160 294 /* Fixed number of lines for vertical front porch - default 3*/ 295 #define CVT_RB_VFPORCH 3 296 int vbilines; 297 int tmp1, tmp2; 298 /* 8. Estimate Horizontal period. */ 299 tmp1 = HV_FACTOR * 1000000 - 300 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 301 tmp2 = vdisplay_rnd + 2 * vmargin; 302 hperiod = tmp1 / (tmp2 * vfieldrate); 303 /* 9. Find number of lines in vertical blanking */ 304 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 305 /* 10. Check if vertical blanking is sufficient */ 306 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 307 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 308 /* 11. Find total number of lines in vertical field */ 309 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 310 /* 12. Find total number of pixels in a line */ 311 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 312 /* Fill in HSync values */ 313 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 314 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 315 /* Fill in VSync values */ 316 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 317 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 318 } 319 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 320 tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */ 321 tmp *= HV_FACTOR * 1000; 322 do_div(tmp, hperiod); 323 tmp -= drm_mode->clock % CVT_CLOCK_STEP; 324 drm_mode->clock = tmp; 325 /* 18/16. Find actual vertical frame frequency */ 326 /* ignore - just set the mode flag for interlaced */ 327 if (interlaced) { 328 drm_mode->vtotal *= 2; 329 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 330 } 331 /* Fill the mode line name */ 332 drm_mode_set_name(drm_mode); 333 if (reduced) 334 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 335 DRM_MODE_FLAG_NVSYNC); 336 else 337 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 338 DRM_MODE_FLAG_NHSYNC); 339 340 return drm_mode; 341 } 342 EXPORT_SYMBOL(drm_cvt_mode); 343 344 /** 345 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm 346 * @dev: drm device 347 * @hdisplay: hdisplay size 348 * @vdisplay: vdisplay size 349 * @vrefresh: vrefresh rate. 350 * @interlaced: whether to compute an interlaced mode 351 * @margins: desired margin (borders) size 352 * @GTF_M: extended GTF formula parameters 353 * @GTF_2C: extended GTF formula parameters 354 * @GTF_K: extended GTF formula parameters 355 * @GTF_2J: extended GTF formula parameters 356 * 357 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 358 * in here multiplied by two. For a C of 40, pass in 80. 359 * 360 * Returns: 361 * The modeline based on the full GTF algorithm stored in a drm_display_mode object. 362 * The display mode object is allocated with drm_mode_create(). Returns NULL 363 * when no mode could be allocated. 364 */ 365 struct drm_display_mode * 366 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 367 int vrefresh, bool interlaced, int margins, 368 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 369 { /* 1) top/bottom margin size (% of height) - default: 1.8, */ 370 #define GTF_MARGIN_PERCENTAGE 18 371 /* 2) character cell horizontal granularity (pixels) - default 8 */ 372 #define GTF_CELL_GRAN 8 373 /* 3) Minimum vertical porch (lines) - default 3 */ 374 #define GTF_MIN_V_PORCH 1 375 /* width of vsync in lines */ 376 #define V_SYNC_RQD 3 377 /* width of hsync as % of total line */ 378 #define H_SYNC_PERCENT 8 379 /* min time of vsync + back porch (microsec) */ 380 #define MIN_VSYNC_PLUS_BP 550 381 /* C' and M' are part of the Blanking Duty Cycle computation */ 382 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 383 #define GTF_M_PRIME (GTF_K * GTF_M / 256) 384 struct drm_display_mode *drm_mode; 385 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 386 int top_margin, bottom_margin; 387 int interlace; 388 unsigned int hfreq_est; 389 int vsync_plus_bp, vback_porch; 390 unsigned int vtotal_lines, vfieldrate_est, hperiod; 391 unsigned int vfield_rate, vframe_rate; 392 int left_margin, right_margin; 393 unsigned int total_active_pixels, ideal_duty_cycle; 394 unsigned int hblank, total_pixels, pixel_freq; 395 int hsync, hfront_porch, vodd_front_porch_lines; 396 unsigned int tmp1, tmp2; 397 398 if (!hdisplay || !vdisplay) 399 return NULL; 400 401 drm_mode = drm_mode_create(dev); 402 if (!drm_mode) 403 return NULL; 404 405 /* 1. In order to give correct results, the number of horizontal 406 * pixels requested is first processed to ensure that it is divisible 407 * by the character size, by rounding it to the nearest character 408 * cell boundary: 409 */ 410 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 411 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 412 413 /* 2. If interlace is requested, the number of vertical lines assumed 414 * by the calculation must be halved, as the computation calculates 415 * the number of vertical lines per field. 416 */ 417 if (interlaced) 418 vdisplay_rnd = vdisplay / 2; 419 else 420 vdisplay_rnd = vdisplay; 421 422 /* 3. Find the frame rate required: */ 423 if (interlaced) 424 vfieldrate_rqd = vrefresh * 2; 425 else 426 vfieldrate_rqd = vrefresh; 427 428 /* 4. Find number of lines in Top margin: */ 429 top_margin = 0; 430 if (margins) 431 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 432 1000; 433 /* 5. Find number of lines in bottom margin: */ 434 bottom_margin = top_margin; 435 436 /* 6. If interlace is required, then set variable interlace: */ 437 if (interlaced) 438 interlace = 1; 439 else 440 interlace = 0; 441 442 /* 7. Estimate the Horizontal frequency */ 443 { 444 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 445 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 446 2 + interlace; 447 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 448 } 449 450 /* 8. Find the number of lines in V sync + back porch */ 451 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 452 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 453 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 454 /* 9. Find the number of lines in V back porch alone: */ 455 vback_porch = vsync_plus_bp - V_SYNC_RQD; 456 /* 10. Find the total number of lines in Vertical field period: */ 457 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 458 vsync_plus_bp + GTF_MIN_V_PORCH; 459 /* 11. Estimate the Vertical field frequency: */ 460 vfieldrate_est = hfreq_est / vtotal_lines; 461 /* 12. Find the actual horizontal period: */ 462 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 463 464 /* 13. Find the actual Vertical field frequency: */ 465 vfield_rate = hfreq_est / vtotal_lines; 466 /* 14. Find the Vertical frame frequency: */ 467 if (interlaced) 468 vframe_rate = vfield_rate / 2; 469 else 470 vframe_rate = vfield_rate; 471 /* 15. Find number of pixels in left margin: */ 472 if (margins) 473 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 474 1000; 475 else 476 left_margin = 0; 477 478 /* 16.Find number of pixels in right margin: */ 479 right_margin = left_margin; 480 /* 17.Find total number of active pixels in image and left and right */ 481 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 482 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 483 ideal_duty_cycle = GTF_C_PRIME * 1000 - 484 (GTF_M_PRIME * 1000000 / hfreq_est); 485 /* 19.Find the number of pixels in the blanking time to the nearest 486 * double character cell: */ 487 hblank = total_active_pixels * ideal_duty_cycle / 488 (100000 - ideal_duty_cycle); 489 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 490 hblank = hblank * 2 * GTF_CELL_GRAN; 491 /* 20.Find total number of pixels: */ 492 total_pixels = total_active_pixels + hblank; 493 /* 21.Find pixel clock frequency: */ 494 pixel_freq = total_pixels * hfreq_est / 1000; 495 /* Stage 1 computations are now complete; I should really pass 496 * the results to another function and do the Stage 2 computations, 497 * but I only need a few more values so I'll just append the 498 * computations here for now */ 499 /* 17. Find the number of pixels in the horizontal sync period: */ 500 hsync = H_SYNC_PERCENT * total_pixels / 100; 501 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 502 hsync = hsync * GTF_CELL_GRAN; 503 /* 18. Find the number of pixels in horizontal front porch period */ 504 hfront_porch = hblank / 2 - hsync; 505 /* 36. Find the number of lines in the odd front porch period: */ 506 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 507 508 /* finally, pack the results in the mode struct */ 509 drm_mode->hdisplay = hdisplay_rnd; 510 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 511 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 512 drm_mode->htotal = total_pixels; 513 drm_mode->vdisplay = vdisplay_rnd; 514 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 515 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 516 drm_mode->vtotal = vtotal_lines; 517 518 drm_mode->clock = pixel_freq; 519 520 if (interlaced) { 521 drm_mode->vtotal *= 2; 522 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 523 } 524 525 drm_mode_set_name(drm_mode); 526 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 527 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 528 else 529 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 530 531 return drm_mode; 532 } 533 EXPORT_SYMBOL(drm_gtf_mode_complex); 534 535 /** 536 * drm_gtf_mode - create the modeline based on the GTF algorithm 537 * @dev: drm device 538 * @hdisplay: hdisplay size 539 * @vdisplay: vdisplay size 540 * @vrefresh: vrefresh rate. 541 * @interlaced: whether to compute an interlaced mode 542 * @margins: desired margin (borders) size 543 * 544 * return the modeline based on GTF algorithm 545 * 546 * This function is to create the modeline based on the GTF algorithm. 547 * Generalized Timing Formula is derived from: 548 * 549 * GTF Spreadsheet by Andy Morrish (1/5/97) 550 * available at http://www.vesa.org 551 * 552 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 553 * What I have done is to translate it by using integer calculation. 554 * I also refer to the function of fb_get_mode in the file of 555 * drivers/video/fbmon.c 556 * 557 * Standard GTF parameters:: 558 * 559 * M = 600 560 * C = 40 561 * K = 128 562 * J = 20 563 * 564 * Returns: 565 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 566 * The display mode object is allocated with drm_mode_create(). Returns NULL 567 * when no mode could be allocated. 568 */ 569 struct drm_display_mode * 570 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 571 bool interlaced, int margins) 572 { 573 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 574 interlaced, margins, 575 600, 40 * 2, 128, 20 * 2); 576 } 577 EXPORT_SYMBOL(drm_gtf_mode); 578 579 #ifdef CONFIG_VIDEOMODE_HELPERS 580 /** 581 * drm_display_mode_from_videomode - fill in @dmode using @vm, 582 * @vm: videomode structure to use as source 583 * @dmode: drm_display_mode structure to use as destination 584 * 585 * Fills out @dmode using the display mode specified in @vm. 586 */ 587 void drm_display_mode_from_videomode(const struct videomode *vm, 588 struct drm_display_mode *dmode) 589 { 590 dmode->hdisplay = vm->hactive; 591 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 592 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 593 dmode->htotal = dmode->hsync_end + vm->hback_porch; 594 595 dmode->vdisplay = vm->vactive; 596 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 597 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 598 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 599 600 dmode->clock = vm->pixelclock / 1000; 601 602 dmode->flags = 0; 603 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 604 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 605 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 606 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 607 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 608 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 609 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 610 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 611 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 612 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 613 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 614 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 615 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 616 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 617 drm_mode_set_name(dmode); 618 } 619 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 620 621 /** 622 * drm_display_mode_to_videomode - fill in @vm using @dmode, 623 * @dmode: drm_display_mode structure to use as source 624 * @vm: videomode structure to use as destination 625 * 626 * Fills out @vm using the display mode specified in @dmode. 627 */ 628 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 629 struct videomode *vm) 630 { 631 vm->hactive = dmode->hdisplay; 632 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 633 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 634 vm->hback_porch = dmode->htotal - dmode->hsync_end; 635 636 vm->vactive = dmode->vdisplay; 637 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 638 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 639 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 640 641 vm->pixelclock = dmode->clock * 1000; 642 643 vm->flags = 0; 644 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 645 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 646 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 647 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 648 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 649 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 650 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 651 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 652 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 653 vm->flags |= DISPLAY_FLAGS_INTERLACED; 654 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 655 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 656 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 657 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 658 } 659 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 660 661 /** 662 * drm_bus_flags_from_videomode - extract information about pixelclk and 663 * DE polarity from videomode and store it in a separate variable 664 * @vm: videomode structure to use 665 * @bus_flags: information about pixelclk, sync and DE polarity will be stored 666 * here 667 * 668 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH), DRM_BUS_FLAG_PIXDATA_DRIVE_(POS|NEG)EDGE 669 * and DISPLAY_FLAGS_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS 670 * found in @vm 671 */ 672 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) 673 { 674 *bus_flags = 0; 675 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) 676 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE; 677 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 678 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; 679 680 if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE) 681 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE; 682 if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE) 683 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE; 684 685 if (vm->flags & DISPLAY_FLAGS_DE_LOW) 686 *bus_flags |= DRM_BUS_FLAG_DE_LOW; 687 if (vm->flags & DISPLAY_FLAGS_DE_HIGH) 688 *bus_flags |= DRM_BUS_FLAG_DE_HIGH; 689 } 690 EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); 691 692 #ifdef CONFIG_OF 693 /** 694 * of_get_drm_display_mode - get a drm_display_mode from devicetree 695 * @np: device_node with the timing specification 696 * @dmode: will be set to the return value 697 * @bus_flags: information about pixelclk, sync and DE polarity 698 * @index: index into the list of display timings in devicetree 699 * 700 * This function is expensive and should only be used, if only one mode is to be 701 * read from DT. To get multiple modes start with of_get_display_timings and 702 * work with that instead. 703 * 704 * Returns: 705 * 0 on success, a negative errno code when no of videomode node was found. 706 */ 707 int of_get_drm_display_mode(struct device_node *np, 708 struct drm_display_mode *dmode, u32 *bus_flags, 709 int index) 710 { 711 struct videomode vm; 712 int ret; 713 714 ret = of_get_videomode(np, &vm, index); 715 if (ret) 716 return ret; 717 718 drm_display_mode_from_videomode(&vm, dmode); 719 if (bus_flags) 720 drm_bus_flags_from_videomode(&vm, bus_flags); 721 722 pr_debug("%pOF: got %dx%d display mode\n", 723 np, vm.hactive, vm.vactive); 724 drm_mode_debug_printmodeline(dmode); 725 726 return 0; 727 } 728 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 729 #endif /* CONFIG_OF */ 730 #endif /* CONFIG_VIDEOMODE_HELPERS */ 731 732 /** 733 * drm_mode_set_name - set the name on a mode 734 * @mode: name will be set in this mode 735 * 736 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 737 * with an optional 'i' suffix for interlaced modes. 738 */ 739 void drm_mode_set_name(struct drm_display_mode *mode) 740 { 741 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 742 743 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 744 mode->hdisplay, mode->vdisplay, 745 interlaced ? "i" : ""); 746 } 747 EXPORT_SYMBOL(drm_mode_set_name); 748 749 /** 750 * drm_mode_hsync - get the hsync of a mode 751 * @mode: mode 752 * 753 * Returns: 754 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the 755 * value first if it is not yet set. 756 */ 757 int drm_mode_hsync(const struct drm_display_mode *mode) 758 { 759 unsigned int calc_val; 760 761 if (mode->hsync) 762 return mode->hsync; 763 764 if (mode->htotal <= 0) 765 return 0; 766 767 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ 768 calc_val += 500; /* round to 1000Hz */ 769 calc_val /= 1000; /* truncate to kHz */ 770 771 return calc_val; 772 } 773 EXPORT_SYMBOL(drm_mode_hsync); 774 775 /** 776 * drm_mode_vrefresh - get the vrefresh of a mode 777 * @mode: mode 778 * 779 * Returns: 780 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 781 * value first if it is not yet set. 782 */ 783 int drm_mode_vrefresh(const struct drm_display_mode *mode) 784 { 785 int refresh = 0; 786 787 if (mode->vrefresh > 0) 788 refresh = mode->vrefresh; 789 else if (mode->htotal > 0 && mode->vtotal > 0) { 790 unsigned int num, den; 791 792 num = mode->clock * 1000; 793 den = mode->htotal * mode->vtotal; 794 795 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 796 num *= 2; 797 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 798 den *= 2; 799 if (mode->vscan > 1) 800 den *= mode->vscan; 801 802 refresh = DIV_ROUND_CLOSEST(num, den); 803 } 804 return refresh; 805 } 806 EXPORT_SYMBOL(drm_mode_vrefresh); 807 808 /** 809 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode 810 * @mode: mode to query 811 * @hdisplay: hdisplay value to fill in 812 * @vdisplay: vdisplay value to fill in 813 * 814 * The vdisplay value will be doubled if the specified mode is a stereo mode of 815 * the appropriate layout. 816 */ 817 void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 818 int *hdisplay, int *vdisplay) 819 { 820 struct drm_display_mode adjusted = *mode; 821 822 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 823 *hdisplay = adjusted.crtc_hdisplay; 824 *vdisplay = adjusted.crtc_vdisplay; 825 } 826 EXPORT_SYMBOL(drm_mode_get_hv_timing); 827 828 /** 829 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 830 * @p: mode 831 * @adjust_flags: a combination of adjustment flags 832 * 833 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 834 * 835 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 836 * interlaced modes. 837 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 838 * buffers containing two eyes (only adjust the timings when needed, eg. for 839 * "frame packing" or "side by side full"). 840 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 841 * be performed for doublescan and vscan > 1 modes respectively. 842 */ 843 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 844 { 845 if (!p) 846 return; 847 848 p->crtc_clock = p->clock; 849 p->crtc_hdisplay = p->hdisplay; 850 p->crtc_hsync_start = p->hsync_start; 851 p->crtc_hsync_end = p->hsync_end; 852 p->crtc_htotal = p->htotal; 853 p->crtc_hskew = p->hskew; 854 p->crtc_vdisplay = p->vdisplay; 855 p->crtc_vsync_start = p->vsync_start; 856 p->crtc_vsync_end = p->vsync_end; 857 p->crtc_vtotal = p->vtotal; 858 859 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 860 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 861 p->crtc_vdisplay /= 2; 862 p->crtc_vsync_start /= 2; 863 p->crtc_vsync_end /= 2; 864 p->crtc_vtotal /= 2; 865 } 866 } 867 868 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 869 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 870 p->crtc_vdisplay *= 2; 871 p->crtc_vsync_start *= 2; 872 p->crtc_vsync_end *= 2; 873 p->crtc_vtotal *= 2; 874 } 875 } 876 877 if (!(adjust_flags & CRTC_NO_VSCAN)) { 878 if (p->vscan > 1) { 879 p->crtc_vdisplay *= p->vscan; 880 p->crtc_vsync_start *= p->vscan; 881 p->crtc_vsync_end *= p->vscan; 882 p->crtc_vtotal *= p->vscan; 883 } 884 } 885 886 if (adjust_flags & CRTC_STEREO_DOUBLE) { 887 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 888 889 switch (layout) { 890 case DRM_MODE_FLAG_3D_FRAME_PACKING: 891 p->crtc_clock *= 2; 892 p->crtc_vdisplay += p->crtc_vtotal; 893 p->crtc_vsync_start += p->crtc_vtotal; 894 p->crtc_vsync_end += p->crtc_vtotal; 895 p->crtc_vtotal += p->crtc_vtotal; 896 break; 897 } 898 } 899 900 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 901 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 902 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 903 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 904 } 905 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 906 907 /** 908 * drm_mode_copy - copy the mode 909 * @dst: mode to overwrite 910 * @src: mode to copy 911 * 912 * Copy an existing mode into another mode, preserving the object id and 913 * list head of the destination mode. 914 */ 915 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 916 { 917 struct list_head head = dst->head; 918 919 *dst = *src; 920 dst->head = head; 921 } 922 EXPORT_SYMBOL(drm_mode_copy); 923 924 /** 925 * drm_mode_duplicate - allocate and duplicate an existing mode 926 * @dev: drm_device to allocate the duplicated mode for 927 * @mode: mode to duplicate 928 * 929 * Just allocate a new mode, copy the existing mode into it, and return 930 * a pointer to it. Used to create new instances of established modes. 931 * 932 * Returns: 933 * Pointer to duplicated mode on success, NULL on error. 934 */ 935 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 936 const struct drm_display_mode *mode) 937 { 938 struct drm_display_mode *nmode; 939 940 nmode = drm_mode_create(dev); 941 if (!nmode) 942 return NULL; 943 944 drm_mode_copy(nmode, mode); 945 946 return nmode; 947 } 948 EXPORT_SYMBOL(drm_mode_duplicate); 949 950 static bool drm_mode_match_timings(const struct drm_display_mode *mode1, 951 const struct drm_display_mode *mode2) 952 { 953 return mode1->hdisplay == mode2->hdisplay && 954 mode1->hsync_start == mode2->hsync_start && 955 mode1->hsync_end == mode2->hsync_end && 956 mode1->htotal == mode2->htotal && 957 mode1->hskew == mode2->hskew && 958 mode1->vdisplay == mode2->vdisplay && 959 mode1->vsync_start == mode2->vsync_start && 960 mode1->vsync_end == mode2->vsync_end && 961 mode1->vtotal == mode2->vtotal && 962 mode1->vscan == mode2->vscan; 963 } 964 965 static bool drm_mode_match_clock(const struct drm_display_mode *mode1, 966 const struct drm_display_mode *mode2) 967 { 968 /* 969 * do clock check convert to PICOS 970 * so fb modes get matched the same 971 */ 972 if (mode1->clock && mode2->clock) 973 return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock); 974 else 975 return mode1->clock == mode2->clock; 976 } 977 978 static bool drm_mode_match_flags(const struct drm_display_mode *mode1, 979 const struct drm_display_mode *mode2) 980 { 981 return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 982 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK); 983 } 984 985 static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1, 986 const struct drm_display_mode *mode2) 987 { 988 return (mode1->flags & DRM_MODE_FLAG_3D_MASK) == 989 (mode2->flags & DRM_MODE_FLAG_3D_MASK); 990 } 991 992 static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1, 993 const struct drm_display_mode *mode2) 994 { 995 return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio; 996 } 997 998 /** 999 * drm_mode_match - test modes for (partial) equality 1000 * @mode1: first mode 1001 * @mode2: second mode 1002 * @match_flags: which parts need to match (DRM_MODE_MATCH_*) 1003 * 1004 * Check to see if @mode1 and @mode2 are equivalent. 1005 * 1006 * Returns: 1007 * True if the modes are (partially) equal, false otherwise. 1008 */ 1009 bool drm_mode_match(const struct drm_display_mode *mode1, 1010 const struct drm_display_mode *mode2, 1011 unsigned int match_flags) 1012 { 1013 if (!mode1 && !mode2) 1014 return true; 1015 1016 if (!mode1 || !mode2) 1017 return false; 1018 1019 if (match_flags & DRM_MODE_MATCH_TIMINGS && 1020 !drm_mode_match_timings(mode1, mode2)) 1021 return false; 1022 1023 if (match_flags & DRM_MODE_MATCH_CLOCK && 1024 !drm_mode_match_clock(mode1, mode2)) 1025 return false; 1026 1027 if (match_flags & DRM_MODE_MATCH_FLAGS && 1028 !drm_mode_match_flags(mode1, mode2)) 1029 return false; 1030 1031 if (match_flags & DRM_MODE_MATCH_3D_FLAGS && 1032 !drm_mode_match_3d_flags(mode1, mode2)) 1033 return false; 1034 1035 if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO && 1036 !drm_mode_match_aspect_ratio(mode1, mode2)) 1037 return false; 1038 1039 return true; 1040 } 1041 EXPORT_SYMBOL(drm_mode_match); 1042 1043 /** 1044 * drm_mode_equal - test modes for equality 1045 * @mode1: first mode 1046 * @mode2: second mode 1047 * 1048 * Check to see if @mode1 and @mode2 are equivalent. 1049 * 1050 * Returns: 1051 * True if the modes are equal, false otherwise. 1052 */ 1053 bool drm_mode_equal(const struct drm_display_mode *mode1, 1054 const struct drm_display_mode *mode2) 1055 { 1056 return drm_mode_match(mode1, mode2, 1057 DRM_MODE_MATCH_TIMINGS | 1058 DRM_MODE_MATCH_CLOCK | 1059 DRM_MODE_MATCH_FLAGS | 1060 DRM_MODE_MATCH_3D_FLAGS| 1061 DRM_MODE_MATCH_ASPECT_RATIO); 1062 } 1063 EXPORT_SYMBOL(drm_mode_equal); 1064 1065 /** 1066 * drm_mode_equal_no_clocks - test modes for equality 1067 * @mode1: first mode 1068 * @mode2: second mode 1069 * 1070 * Check to see if @mode1 and @mode2 are equivalent, but 1071 * don't check the pixel clocks. 1072 * 1073 * Returns: 1074 * True if the modes are equal, false otherwise. 1075 */ 1076 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, 1077 const struct drm_display_mode *mode2) 1078 { 1079 return drm_mode_match(mode1, mode2, 1080 DRM_MODE_MATCH_TIMINGS | 1081 DRM_MODE_MATCH_FLAGS | 1082 DRM_MODE_MATCH_3D_FLAGS); 1083 } 1084 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 1085 1086 /** 1087 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 1088 * @mode1: first mode 1089 * @mode2: second mode 1090 * 1091 * Check to see if @mode1 and @mode2 are equivalent, but 1092 * don't check the pixel clocks nor the stereo layout. 1093 * 1094 * Returns: 1095 * True if the modes are equal, false otherwise. 1096 */ 1097 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 1098 const struct drm_display_mode *mode2) 1099 { 1100 return drm_mode_match(mode1, mode2, 1101 DRM_MODE_MATCH_TIMINGS | 1102 DRM_MODE_MATCH_FLAGS); 1103 } 1104 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1105 1106 static enum drm_mode_status 1107 drm_mode_validate_basic(const struct drm_display_mode *mode) 1108 { 1109 if (mode->type & ~DRM_MODE_TYPE_ALL) 1110 return MODE_BAD; 1111 1112 if (mode->flags & ~DRM_MODE_FLAG_ALL) 1113 return MODE_BAD; 1114 1115 if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1116 return MODE_BAD; 1117 1118 if (mode->clock == 0) 1119 return MODE_CLOCK_LOW; 1120 1121 if (mode->hdisplay == 0 || 1122 mode->hsync_start < mode->hdisplay || 1123 mode->hsync_end < mode->hsync_start || 1124 mode->htotal < mode->hsync_end) 1125 return MODE_H_ILLEGAL; 1126 1127 if (mode->vdisplay == 0 || 1128 mode->vsync_start < mode->vdisplay || 1129 mode->vsync_end < mode->vsync_start || 1130 mode->vtotal < mode->vsync_end) 1131 return MODE_V_ILLEGAL; 1132 1133 return MODE_OK; 1134 } 1135 1136 /** 1137 * drm_mode_validate_driver - make sure the mode is somewhat sane 1138 * @dev: drm device 1139 * @mode: mode to check 1140 * 1141 * First do basic validation on the mode, and then allow the driver 1142 * to check for device/driver specific limitations via the optional 1143 * &drm_mode_config_helper_funcs.mode_valid hook. 1144 * 1145 * Returns: 1146 * The mode status 1147 */ 1148 enum drm_mode_status 1149 drm_mode_validate_driver(struct drm_device *dev, 1150 const struct drm_display_mode *mode) 1151 { 1152 enum drm_mode_status status; 1153 1154 status = drm_mode_validate_basic(mode); 1155 if (status != MODE_OK) 1156 return status; 1157 1158 if (dev->mode_config.funcs->mode_valid) 1159 return dev->mode_config.funcs->mode_valid(dev, mode); 1160 else 1161 return MODE_OK; 1162 } 1163 EXPORT_SYMBOL(drm_mode_validate_driver); 1164 1165 /** 1166 * drm_mode_validate_size - make sure modes adhere to size constraints 1167 * @mode: mode to check 1168 * @maxX: maximum width 1169 * @maxY: maximum height 1170 * 1171 * This function is a helper which can be used to validate modes against size 1172 * limitations of the DRM device/connector. If a mode is too big its status 1173 * member is updated with the appropriate validation failure code. The list 1174 * itself is not changed. 1175 * 1176 * Returns: 1177 * The mode status 1178 */ 1179 enum drm_mode_status 1180 drm_mode_validate_size(const struct drm_display_mode *mode, 1181 int maxX, int maxY) 1182 { 1183 if (maxX > 0 && mode->hdisplay > maxX) 1184 return MODE_VIRTUAL_X; 1185 1186 if (maxY > 0 && mode->vdisplay > maxY) 1187 return MODE_VIRTUAL_Y; 1188 1189 return MODE_OK; 1190 } 1191 EXPORT_SYMBOL(drm_mode_validate_size); 1192 1193 /** 1194 * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed 1195 * @mode: mode to check 1196 * @connector: drm connector under action 1197 * 1198 * This function is a helper which can be used to filter out any YCBCR420 1199 * only mode, when the source doesn't support it. 1200 * 1201 * Returns: 1202 * The mode status 1203 */ 1204 enum drm_mode_status 1205 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode, 1206 struct drm_connector *connector) 1207 { 1208 u8 vic = drm_match_cea_mode(mode); 1209 enum drm_mode_status status = MODE_OK; 1210 struct drm_hdmi_info *hdmi = &connector->display_info.hdmi; 1211 1212 if (test_bit(vic, hdmi->y420_vdb_modes)) { 1213 if (!connector->ycbcr_420_allowed) 1214 status = MODE_NO_420; 1215 } 1216 1217 return status; 1218 } 1219 EXPORT_SYMBOL(drm_mode_validate_ycbcr420); 1220 1221 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1222 1223 static const char * const drm_mode_status_names[] = { 1224 MODE_STATUS(OK), 1225 MODE_STATUS(HSYNC), 1226 MODE_STATUS(VSYNC), 1227 MODE_STATUS(H_ILLEGAL), 1228 MODE_STATUS(V_ILLEGAL), 1229 MODE_STATUS(BAD_WIDTH), 1230 MODE_STATUS(NOMODE), 1231 MODE_STATUS(NO_INTERLACE), 1232 MODE_STATUS(NO_DBLESCAN), 1233 MODE_STATUS(NO_VSCAN), 1234 MODE_STATUS(MEM), 1235 MODE_STATUS(VIRTUAL_X), 1236 MODE_STATUS(VIRTUAL_Y), 1237 MODE_STATUS(MEM_VIRT), 1238 MODE_STATUS(NOCLOCK), 1239 MODE_STATUS(CLOCK_HIGH), 1240 MODE_STATUS(CLOCK_LOW), 1241 MODE_STATUS(CLOCK_RANGE), 1242 MODE_STATUS(BAD_HVALUE), 1243 MODE_STATUS(BAD_VVALUE), 1244 MODE_STATUS(BAD_VSCAN), 1245 MODE_STATUS(HSYNC_NARROW), 1246 MODE_STATUS(HSYNC_WIDE), 1247 MODE_STATUS(HBLANK_NARROW), 1248 MODE_STATUS(HBLANK_WIDE), 1249 MODE_STATUS(VSYNC_NARROW), 1250 MODE_STATUS(VSYNC_WIDE), 1251 MODE_STATUS(VBLANK_NARROW), 1252 MODE_STATUS(VBLANK_WIDE), 1253 MODE_STATUS(PANEL), 1254 MODE_STATUS(INTERLACE_WIDTH), 1255 MODE_STATUS(ONE_WIDTH), 1256 MODE_STATUS(ONE_HEIGHT), 1257 MODE_STATUS(ONE_SIZE), 1258 MODE_STATUS(NO_REDUCED), 1259 MODE_STATUS(NO_STEREO), 1260 MODE_STATUS(NO_420), 1261 MODE_STATUS(STALE), 1262 MODE_STATUS(BAD), 1263 MODE_STATUS(ERROR), 1264 }; 1265 1266 #undef MODE_STATUS 1267 1268 const char *drm_get_mode_status_name(enum drm_mode_status status) 1269 { 1270 int index = status + 3; 1271 1272 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1273 return ""; 1274 1275 return drm_mode_status_names[index]; 1276 } 1277 1278 /** 1279 * drm_mode_prune_invalid - remove invalid modes from mode list 1280 * @dev: DRM device 1281 * @mode_list: list of modes to check 1282 * @verbose: be verbose about it 1283 * 1284 * This helper function can be used to prune a display mode list after 1285 * validation has been completed. All modes whose status is not MODE_OK will be 1286 * removed from the list, and if @verbose the status code and mode name is also 1287 * printed to dmesg. 1288 */ 1289 void drm_mode_prune_invalid(struct drm_device *dev, 1290 struct list_head *mode_list, bool verbose) 1291 { 1292 struct drm_display_mode *mode, *t; 1293 1294 list_for_each_entry_safe(mode, t, mode_list, head) { 1295 if (mode->status != MODE_OK) { 1296 list_del(&mode->head); 1297 if (verbose) { 1298 drm_mode_debug_printmodeline(mode); 1299 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1300 mode->name, 1301 drm_get_mode_status_name(mode->status)); 1302 } 1303 drm_mode_destroy(dev, mode); 1304 } 1305 } 1306 } 1307 EXPORT_SYMBOL(drm_mode_prune_invalid); 1308 1309 /** 1310 * drm_mode_compare - compare modes for favorability 1311 * @priv: unused 1312 * @lh_a: list_head for first mode 1313 * @lh_b: list_head for second mode 1314 * 1315 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1316 * which is better. 1317 * 1318 * Returns: 1319 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1320 * positive if @lh_b is better than @lh_a. 1321 */ 1322 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) 1323 { 1324 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1325 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1326 int diff; 1327 1328 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1329 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1330 if (diff) 1331 return diff; 1332 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1333 if (diff) 1334 return diff; 1335 1336 diff = b->vrefresh - a->vrefresh; 1337 if (diff) 1338 return diff; 1339 1340 diff = b->clock - a->clock; 1341 return diff; 1342 } 1343 1344 /** 1345 * drm_mode_sort - sort mode list 1346 * @mode_list: list of drm_display_mode structures to sort 1347 * 1348 * Sort @mode_list by favorability, moving good modes to the head of the list. 1349 */ 1350 void drm_mode_sort(struct list_head *mode_list) 1351 { 1352 list_sort(NULL, mode_list, drm_mode_compare); 1353 } 1354 EXPORT_SYMBOL(drm_mode_sort); 1355 1356 /** 1357 * drm_connector_list_update - update the mode list for the connector 1358 * @connector: the connector to update 1359 * 1360 * This moves the modes from the @connector probed_modes list 1361 * to the actual mode list. It compares the probed mode against the current 1362 * list and only adds different/new modes. 1363 * 1364 * This is just a helper functions doesn't validate any modes itself and also 1365 * doesn't prune any invalid modes. Callers need to do that themselves. 1366 */ 1367 void drm_connector_list_update(struct drm_connector *connector) 1368 { 1369 struct drm_display_mode *pmode, *pt; 1370 1371 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1372 1373 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1374 struct drm_display_mode *mode; 1375 bool found_it = false; 1376 1377 /* go through current modes checking for the new probed mode */ 1378 list_for_each_entry(mode, &connector->modes, head) { 1379 if (!drm_mode_equal(pmode, mode)) 1380 continue; 1381 1382 found_it = true; 1383 1384 /* 1385 * If the old matching mode is stale (ie. left over 1386 * from a previous probe) just replace it outright. 1387 * Otherwise just merge the type bits between all 1388 * equal probed modes. 1389 * 1390 * If two probed modes are considered equal, pick the 1391 * actual timings from the one that's marked as 1392 * preferred (in case the match isn't 100%). If 1393 * multiple or zero preferred modes are present, favor 1394 * the mode added to the probed_modes list first. 1395 */ 1396 if (mode->status == MODE_STALE) { 1397 drm_mode_copy(mode, pmode); 1398 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1399 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1400 pmode->type |= mode->type; 1401 drm_mode_copy(mode, pmode); 1402 } else { 1403 mode->type |= pmode->type; 1404 } 1405 1406 list_del(&pmode->head); 1407 drm_mode_destroy(connector->dev, pmode); 1408 break; 1409 } 1410 1411 if (!found_it) { 1412 list_move_tail(&pmode->head, &connector->modes); 1413 } 1414 } 1415 } 1416 EXPORT_SYMBOL(drm_connector_list_update); 1417 1418 static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, 1419 struct drm_cmdline_mode *mode) 1420 { 1421 unsigned int bpp; 1422 1423 if (str[0] != '-') 1424 return -EINVAL; 1425 1426 str++; 1427 bpp = simple_strtol(str, end_ptr, 10); 1428 if (*end_ptr == str) 1429 return -EINVAL; 1430 1431 mode->bpp = bpp; 1432 mode->bpp_specified = true; 1433 1434 return 0; 1435 } 1436 1437 static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, 1438 struct drm_cmdline_mode *mode) 1439 { 1440 unsigned int refresh; 1441 1442 if (str[0] != '@') 1443 return -EINVAL; 1444 1445 str++; 1446 refresh = simple_strtol(str, end_ptr, 10); 1447 if (*end_ptr == str) 1448 return -EINVAL; 1449 1450 mode->refresh = refresh; 1451 mode->refresh_specified = true; 1452 1453 return 0; 1454 } 1455 1456 static int drm_mode_parse_cmdline_extra(const char *str, int length, 1457 const struct drm_connector *connector, 1458 struct drm_cmdline_mode *mode) 1459 { 1460 int i; 1461 1462 for (i = 0; i < length; i++) { 1463 switch (str[i]) { 1464 case 'i': 1465 mode->interlace = true; 1466 break; 1467 case 'm': 1468 mode->margins = true; 1469 break; 1470 case 'D': 1471 if (mode->force != DRM_FORCE_UNSPECIFIED) 1472 return -EINVAL; 1473 1474 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1475 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1476 mode->force = DRM_FORCE_ON; 1477 else 1478 mode->force = DRM_FORCE_ON_DIGITAL; 1479 break; 1480 case 'd': 1481 if (mode->force != DRM_FORCE_UNSPECIFIED) 1482 return -EINVAL; 1483 1484 mode->force = DRM_FORCE_OFF; 1485 break; 1486 case 'e': 1487 if (mode->force != DRM_FORCE_UNSPECIFIED) 1488 return -EINVAL; 1489 1490 mode->force = DRM_FORCE_ON; 1491 break; 1492 default: 1493 return -EINVAL; 1494 } 1495 } 1496 1497 return 0; 1498 } 1499 1500 static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, 1501 bool extras, 1502 const struct drm_connector *connector, 1503 struct drm_cmdline_mode *mode) 1504 { 1505 const char *str_start = str; 1506 bool rb = false, cvt = false; 1507 int xres = 0, yres = 0; 1508 int remaining, i; 1509 char *end_ptr; 1510 1511 xres = simple_strtol(str, &end_ptr, 10); 1512 if (end_ptr == str) 1513 return -EINVAL; 1514 1515 if (end_ptr[0] != 'x') 1516 return -EINVAL; 1517 end_ptr++; 1518 1519 str = end_ptr; 1520 yres = simple_strtol(str, &end_ptr, 10); 1521 if (end_ptr == str) 1522 return -EINVAL; 1523 1524 remaining = length - (end_ptr - str_start); 1525 if (remaining < 0) 1526 return -EINVAL; 1527 1528 for (i = 0; i < remaining; i++) { 1529 switch (end_ptr[i]) { 1530 case 'M': 1531 cvt = true; 1532 break; 1533 case 'R': 1534 rb = true; 1535 break; 1536 default: 1537 /* 1538 * Try to pass that to our extras parsing 1539 * function to handle the case where the 1540 * extras are directly after the resolution 1541 */ 1542 if (extras) { 1543 int ret = drm_mode_parse_cmdline_extra(end_ptr + i, 1544 1, 1545 connector, 1546 mode); 1547 if (ret) 1548 return ret; 1549 } else { 1550 return -EINVAL; 1551 } 1552 } 1553 } 1554 1555 mode->xres = xres; 1556 mode->yres = yres; 1557 mode->cvt = cvt; 1558 mode->rb = rb; 1559 1560 return 0; 1561 } 1562 1563 static int drm_mode_parse_cmdline_options(char *str, size_t len, 1564 const struct drm_connector *connector, 1565 struct drm_cmdline_mode *mode) 1566 { 1567 unsigned int rotation = 0; 1568 char *sep = str; 1569 1570 while ((sep = strchr(sep, ','))) { 1571 char *delim, *option; 1572 1573 option = sep + 1; 1574 delim = strchr(option, '='); 1575 if (!delim) { 1576 delim = strchr(option, ','); 1577 1578 if (!delim) 1579 delim = str + len; 1580 } 1581 1582 if (!strncmp(option, "rotate", delim - option)) { 1583 const char *value = delim + 1; 1584 unsigned int deg; 1585 1586 deg = simple_strtol(value, &sep, 10); 1587 1588 /* Make sure we have parsed something */ 1589 if (sep == value) 1590 return -EINVAL; 1591 1592 switch (deg) { 1593 case 0: 1594 rotation |= DRM_MODE_ROTATE_0; 1595 break; 1596 1597 case 90: 1598 rotation |= DRM_MODE_ROTATE_90; 1599 break; 1600 1601 case 180: 1602 rotation |= DRM_MODE_ROTATE_180; 1603 break; 1604 1605 case 270: 1606 rotation |= DRM_MODE_ROTATE_270; 1607 break; 1608 1609 default: 1610 return -EINVAL; 1611 } 1612 } else if (!strncmp(option, "reflect_x", delim - option)) { 1613 rotation |= DRM_MODE_REFLECT_X; 1614 sep = delim; 1615 } else if (!strncmp(option, "reflect_y", delim - option)) { 1616 rotation |= DRM_MODE_REFLECT_Y; 1617 sep = delim; 1618 } else if (!strncmp(option, "margin_right", delim - option)) { 1619 const char *value = delim + 1; 1620 unsigned int margin; 1621 1622 margin = simple_strtol(value, &sep, 10); 1623 1624 /* Make sure we have parsed something */ 1625 if (sep == value) 1626 return -EINVAL; 1627 1628 mode->tv_margins.right = margin; 1629 } else if (!strncmp(option, "margin_left", delim - option)) { 1630 const char *value = delim + 1; 1631 unsigned int margin; 1632 1633 margin = simple_strtol(value, &sep, 10); 1634 1635 /* Make sure we have parsed something */ 1636 if (sep == value) 1637 return -EINVAL; 1638 1639 mode->tv_margins.left = margin; 1640 } else if (!strncmp(option, "margin_top", delim - option)) { 1641 const char *value = delim + 1; 1642 unsigned int margin; 1643 1644 margin = simple_strtol(value, &sep, 10); 1645 1646 /* Make sure we have parsed something */ 1647 if (sep == value) 1648 return -EINVAL; 1649 1650 mode->tv_margins.top = margin; 1651 } else if (!strncmp(option, "margin_bottom", delim - option)) { 1652 const char *value = delim + 1; 1653 unsigned int margin; 1654 1655 margin = simple_strtol(value, &sep, 10); 1656 1657 /* Make sure we have parsed something */ 1658 if (sep == value) 1659 return -EINVAL; 1660 1661 mode->tv_margins.bottom = margin; 1662 } else { 1663 return -EINVAL; 1664 } 1665 } 1666 1667 mode->rotation_reflection = rotation; 1668 1669 return 0; 1670 } 1671 1672 /** 1673 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1674 * @mode_option: optional per connector mode option 1675 * @connector: connector to parse modeline for 1676 * @mode: preallocated drm_cmdline_mode structure to fill out 1677 * 1678 * This parses @mode_option command line modeline for modes and options to 1679 * configure the connector. If @mode_option is NULL the default command line 1680 * modeline in fb_mode_option will be parsed instead. 1681 * 1682 * This uses the same parameters as the fb modedb.c, except for an extra 1683 * force-enable, force-enable-digital and force-disable bit at the end:: 1684 * 1685 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1686 * 1687 * Additionals options can be provided following the mode, using a comma to 1688 * separate each option. Valid options can be found in 1689 * Documentation/fb/modedb.rst. 1690 * 1691 * The intermediate drm_cmdline_mode structure is required to store additional 1692 * options from the command line modline like the force-enable/disable flag. 1693 * 1694 * Returns: 1695 * True if a valid modeline has been parsed, false otherwise. 1696 */ 1697 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1698 const struct drm_connector *connector, 1699 struct drm_cmdline_mode *mode) 1700 { 1701 const char *name; 1702 bool named_mode = false, parse_extras = false; 1703 unsigned int bpp_off = 0, refresh_off = 0, options_off = 0; 1704 unsigned int mode_end = 0; 1705 char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; 1706 char *options_ptr = NULL; 1707 char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; 1708 int ret; 1709 1710 #ifdef CONFIG_FB 1711 if (!mode_option) 1712 mode_option = fb_mode_option; 1713 #endif 1714 1715 if (!mode_option) { 1716 mode->specified = false; 1717 return false; 1718 } 1719 1720 name = mode_option; 1721 1722 /* 1723 * This is a bit convoluted. To differentiate between the 1724 * named modes and poorly formatted resolutions, we need a 1725 * bunch of things: 1726 * - We need to make sure that the first character (which 1727 * would be our resolution in X) is a digit. 1728 * - However, if the X resolution is missing, then we end up 1729 * with something like x<yres>, with our first character 1730 * being an alpha-numerical character, which would be 1731 * considered a named mode. 1732 * 1733 * If this isn't enough, we should add more heuristics here, 1734 * and matching unit-tests. 1735 */ 1736 if (!isdigit(name[0]) && name[0] != 'x') 1737 named_mode = true; 1738 1739 /* Try to locate the bpp and refresh specifiers, if any */ 1740 bpp_ptr = strchr(name, '-'); 1741 if (bpp_ptr) { 1742 bpp_off = bpp_ptr - name; 1743 mode->bpp_specified = true; 1744 } 1745 1746 refresh_ptr = strchr(name, '@'); 1747 if (refresh_ptr) { 1748 if (named_mode) 1749 return false; 1750 1751 refresh_off = refresh_ptr - name; 1752 mode->refresh_specified = true; 1753 } 1754 1755 /* Locate the start of named options */ 1756 options_ptr = strchr(name, ','); 1757 if (options_ptr) 1758 options_off = options_ptr - name; 1759 1760 /* Locate the end of the name / resolution, and parse it */ 1761 if (bpp_ptr) { 1762 mode_end = bpp_off; 1763 } else if (refresh_ptr) { 1764 mode_end = refresh_off; 1765 } else if (options_ptr) { 1766 mode_end = options_off; 1767 } else { 1768 mode_end = strlen(name); 1769 parse_extras = true; 1770 } 1771 1772 if (named_mode) { 1773 strncpy(mode->name, name, mode_end); 1774 } else { 1775 ret = drm_mode_parse_cmdline_res_mode(name, mode_end, 1776 parse_extras, 1777 connector, 1778 mode); 1779 if (ret) 1780 return false; 1781 } 1782 mode->specified = true; 1783 1784 if (bpp_ptr) { 1785 ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); 1786 if (ret) 1787 return false; 1788 } 1789 1790 if (refresh_ptr) { 1791 ret = drm_mode_parse_cmdline_refresh(refresh_ptr, 1792 &refresh_end_ptr, mode); 1793 if (ret) 1794 return false; 1795 } 1796 1797 /* 1798 * Locate the end of the bpp / refresh, and parse the extras 1799 * if relevant 1800 */ 1801 if (bpp_ptr && refresh_ptr) 1802 extra_ptr = max(bpp_end_ptr, refresh_end_ptr); 1803 else if (bpp_ptr) 1804 extra_ptr = bpp_end_ptr; 1805 else if (refresh_ptr) 1806 extra_ptr = refresh_end_ptr; 1807 1808 if (extra_ptr && 1809 extra_ptr != options_ptr) { 1810 int len = strlen(name) - (extra_ptr - name); 1811 1812 ret = drm_mode_parse_cmdline_extra(extra_ptr, len, 1813 connector, mode); 1814 if (ret) 1815 return false; 1816 } 1817 1818 if (options_ptr) { 1819 int len = strlen(name) - (options_ptr - name); 1820 1821 ret = drm_mode_parse_cmdline_options(options_ptr, len, 1822 connector, mode); 1823 if (ret) 1824 return false; 1825 } 1826 1827 return true; 1828 } 1829 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1830 1831 /** 1832 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1833 * @dev: DRM device to create the new mode for 1834 * @cmd: input command line modeline 1835 * 1836 * Returns: 1837 * Pointer to converted mode on success, NULL on error. 1838 */ 1839 struct drm_display_mode * 1840 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1841 struct drm_cmdline_mode *cmd) 1842 { 1843 struct drm_display_mode *mode; 1844 1845 if (cmd->cvt) 1846 mode = drm_cvt_mode(dev, 1847 cmd->xres, cmd->yres, 1848 cmd->refresh_specified ? cmd->refresh : 60, 1849 cmd->rb, cmd->interlace, 1850 cmd->margins); 1851 else 1852 mode = drm_gtf_mode(dev, 1853 cmd->xres, cmd->yres, 1854 cmd->refresh_specified ? cmd->refresh : 60, 1855 cmd->interlace, 1856 cmd->margins); 1857 if (!mode) 1858 return NULL; 1859 1860 mode->type |= DRM_MODE_TYPE_USERDEF; 1861 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ 1862 if (cmd->xres == 1366) 1863 drm_mode_fixup_1366x768(mode); 1864 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1865 return mode; 1866 } 1867 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1868 1869 /** 1870 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1871 * @out: drm_mode_modeinfo struct to return to the user 1872 * @in: drm_display_mode to use 1873 * 1874 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1875 * the user. 1876 */ 1877 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1878 const struct drm_display_mode *in) 1879 { 1880 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1881 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1882 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1883 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1884 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1885 "timing values too large for mode info\n"); 1886 1887 out->clock = in->clock; 1888 out->hdisplay = in->hdisplay; 1889 out->hsync_start = in->hsync_start; 1890 out->hsync_end = in->hsync_end; 1891 out->htotal = in->htotal; 1892 out->hskew = in->hskew; 1893 out->vdisplay = in->vdisplay; 1894 out->vsync_start = in->vsync_start; 1895 out->vsync_end = in->vsync_end; 1896 out->vtotal = in->vtotal; 1897 out->vscan = in->vscan; 1898 out->vrefresh = in->vrefresh; 1899 out->flags = in->flags; 1900 out->type = in->type; 1901 1902 switch (in->picture_aspect_ratio) { 1903 case HDMI_PICTURE_ASPECT_4_3: 1904 out->flags |= DRM_MODE_FLAG_PIC_AR_4_3; 1905 break; 1906 case HDMI_PICTURE_ASPECT_16_9: 1907 out->flags |= DRM_MODE_FLAG_PIC_AR_16_9; 1908 break; 1909 case HDMI_PICTURE_ASPECT_64_27: 1910 out->flags |= DRM_MODE_FLAG_PIC_AR_64_27; 1911 break; 1912 case HDMI_PICTURE_ASPECT_256_135: 1913 out->flags |= DRM_MODE_FLAG_PIC_AR_256_135; 1914 break; 1915 case HDMI_PICTURE_ASPECT_RESERVED: 1916 default: 1917 out->flags |= DRM_MODE_FLAG_PIC_AR_NONE; 1918 break; 1919 } 1920 1921 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1922 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1923 } 1924 1925 /** 1926 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1927 * @dev: drm device 1928 * @out: drm_display_mode to return to the user 1929 * @in: drm_mode_modeinfo to use 1930 * 1931 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1932 * the caller. 1933 * 1934 * Returns: 1935 * Zero on success, negative errno on failure. 1936 */ 1937 int drm_mode_convert_umode(struct drm_device *dev, 1938 struct drm_display_mode *out, 1939 const struct drm_mode_modeinfo *in) 1940 { 1941 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 1942 return -ERANGE; 1943 1944 out->clock = in->clock; 1945 out->hdisplay = in->hdisplay; 1946 out->hsync_start = in->hsync_start; 1947 out->hsync_end = in->hsync_end; 1948 out->htotal = in->htotal; 1949 out->hskew = in->hskew; 1950 out->vdisplay = in->vdisplay; 1951 out->vsync_start = in->vsync_start; 1952 out->vsync_end = in->vsync_end; 1953 out->vtotal = in->vtotal; 1954 out->vscan = in->vscan; 1955 out->vrefresh = in->vrefresh; 1956 out->flags = in->flags; 1957 /* 1958 * Old xf86-video-vmware (possibly others too) used to 1959 * leave 'type' unititialized. Just ignore any bits we 1960 * don't like. It's a just hint after all, and more 1961 * useful for the kernel->userspace direction anyway. 1962 */ 1963 out->type = in->type & DRM_MODE_TYPE_ALL; 1964 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1965 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1966 1967 /* Clearing picture aspect ratio bits from out flags, 1968 * as the aspect-ratio information is not stored in 1969 * flags for kernel-mode, but in picture_aspect_ratio. 1970 */ 1971 out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 1972 1973 switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) { 1974 case DRM_MODE_FLAG_PIC_AR_4_3: 1975 out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_4_3; 1976 break; 1977 case DRM_MODE_FLAG_PIC_AR_16_9: 1978 out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_16_9; 1979 break; 1980 case DRM_MODE_FLAG_PIC_AR_64_27: 1981 out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_64_27; 1982 break; 1983 case DRM_MODE_FLAG_PIC_AR_256_135: 1984 out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_256_135; 1985 break; 1986 default: 1987 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE; 1988 break; 1989 } 1990 1991 out->status = drm_mode_validate_driver(dev, out); 1992 if (out->status != MODE_OK) 1993 return -EINVAL; 1994 1995 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 1996 1997 return 0; 1998 } 1999 2000 /** 2001 * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420 2002 * output format 2003 * 2004 * @display: display under action 2005 * @mode: video mode to be tested. 2006 * 2007 * Returns: 2008 * true if the mode can be supported in YCBCR420 format 2009 * false if not. 2010 */ 2011 bool drm_mode_is_420_only(const struct drm_display_info *display, 2012 const struct drm_display_mode *mode) 2013 { 2014 u8 vic = drm_match_cea_mode(mode); 2015 2016 return test_bit(vic, display->hdmi.y420_vdb_modes); 2017 } 2018 EXPORT_SYMBOL(drm_mode_is_420_only); 2019 2020 /** 2021 * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420 2022 * output format also (along with RGB/YCBCR444/422) 2023 * 2024 * @display: display under action. 2025 * @mode: video mode to be tested. 2026 * 2027 * Returns: 2028 * true if the mode can be support YCBCR420 format 2029 * false if not. 2030 */ 2031 bool drm_mode_is_420_also(const struct drm_display_info *display, 2032 const struct drm_display_mode *mode) 2033 { 2034 u8 vic = drm_match_cea_mode(mode); 2035 2036 return test_bit(vic, display->hdmi.y420_cmdb_modes); 2037 } 2038 EXPORT_SYMBOL(drm_mode_is_420_also); 2039 /** 2040 * drm_mode_is_420 - if a given videomode can be supported in YCBCR420 2041 * output format 2042 * 2043 * @display: display under action. 2044 * @mode: video mode to be tested. 2045 * 2046 * Returns: 2047 * true if the mode can be supported in YCBCR420 format 2048 * false if not. 2049 */ 2050 bool drm_mode_is_420(const struct drm_display_info *display, 2051 const struct drm_display_mode *mode) 2052 { 2053 return drm_mode_is_420_only(display, mode) || 2054 drm_mode_is_420_also(display, mode); 2055 } 2056 EXPORT_SYMBOL(drm_mode_is_420); 2057