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, __maybe_unused 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, __maybe_unused vback_porch; 390 unsigned int vtotal_lines, __maybe_unused vfieldrate_est; 391 unsigned int __maybe_unused hperiod; 392 unsigned int vfield_rate, __maybe_unused vframe_rate; 393 int left_margin, right_margin; 394 unsigned int total_active_pixels, ideal_duty_cycle; 395 unsigned int hblank, total_pixels, pixel_freq; 396 int hsync, hfront_porch, vodd_front_porch_lines; 397 unsigned int tmp1, tmp2; 398 399 if (!hdisplay || !vdisplay) 400 return NULL; 401 402 drm_mode = drm_mode_create(dev); 403 if (!drm_mode) 404 return NULL; 405 406 /* 1. In order to give correct results, the number of horizontal 407 * pixels requested is first processed to ensure that it is divisible 408 * by the character size, by rounding it to the nearest character 409 * cell boundary: 410 */ 411 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 412 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 413 414 /* 2. If interlace is requested, the number of vertical lines assumed 415 * by the calculation must be halved, as the computation calculates 416 * the number of vertical lines per field. 417 */ 418 if (interlaced) 419 vdisplay_rnd = vdisplay / 2; 420 else 421 vdisplay_rnd = vdisplay; 422 423 /* 3. Find the frame rate required: */ 424 if (interlaced) 425 vfieldrate_rqd = vrefresh * 2; 426 else 427 vfieldrate_rqd = vrefresh; 428 429 /* 4. Find number of lines in Top margin: */ 430 top_margin = 0; 431 if (margins) 432 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 433 1000; 434 /* 5. Find number of lines in bottom margin: */ 435 bottom_margin = top_margin; 436 437 /* 6. If interlace is required, then set variable interlace: */ 438 if (interlaced) 439 interlace = 1; 440 else 441 interlace = 0; 442 443 /* 7. Estimate the Horizontal frequency */ 444 { 445 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 446 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 447 2 + interlace; 448 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 449 } 450 451 /* 8. Find the number of lines in V sync + back porch */ 452 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 453 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 454 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 455 /* 9. Find the number of lines in V back porch alone: */ 456 vback_porch = vsync_plus_bp - V_SYNC_RQD; 457 /* 10. Find the total number of lines in Vertical field period: */ 458 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 459 vsync_plus_bp + GTF_MIN_V_PORCH; 460 /* 11. Estimate the Vertical field frequency: */ 461 vfieldrate_est = hfreq_est / vtotal_lines; 462 /* 12. Find the actual horizontal period: */ 463 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 464 465 /* 13. Find the actual Vertical field frequency: */ 466 vfield_rate = hfreq_est / vtotal_lines; 467 /* 14. Find the Vertical frame frequency: */ 468 if (interlaced) 469 vframe_rate = vfield_rate / 2; 470 else 471 vframe_rate = vfield_rate; 472 /* 15. Find number of pixels in left margin: */ 473 if (margins) 474 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 475 1000; 476 else 477 left_margin = 0; 478 479 /* 16.Find number of pixels in right margin: */ 480 right_margin = left_margin; 481 /* 17.Find total number of active pixels in image and left and right */ 482 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 483 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 484 ideal_duty_cycle = GTF_C_PRIME * 1000 - 485 (GTF_M_PRIME * 1000000 / hfreq_est); 486 /* 19.Find the number of pixels in the blanking time to the nearest 487 * double character cell: */ 488 hblank = total_active_pixels * ideal_duty_cycle / 489 (100000 - ideal_duty_cycle); 490 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 491 hblank = hblank * 2 * GTF_CELL_GRAN; 492 /* 20.Find total number of pixels: */ 493 total_pixels = total_active_pixels + hblank; 494 /* 21.Find pixel clock frequency: */ 495 pixel_freq = total_pixels * hfreq_est / 1000; 496 /* Stage 1 computations are now complete; I should really pass 497 * the results to another function and do the Stage 2 computations, 498 * but I only need a few more values so I'll just append the 499 * computations here for now */ 500 /* 17. Find the number of pixels in the horizontal sync period: */ 501 hsync = H_SYNC_PERCENT * total_pixels / 100; 502 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 503 hsync = hsync * GTF_CELL_GRAN; 504 /* 18. Find the number of pixels in horizontal front porch period */ 505 hfront_porch = hblank / 2 - hsync; 506 /* 36. Find the number of lines in the odd front porch period: */ 507 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 508 509 /* finally, pack the results in the mode struct */ 510 drm_mode->hdisplay = hdisplay_rnd; 511 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 512 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 513 drm_mode->htotal = total_pixels; 514 drm_mode->vdisplay = vdisplay_rnd; 515 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 516 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 517 drm_mode->vtotal = vtotal_lines; 518 519 drm_mode->clock = pixel_freq; 520 521 if (interlaced) { 522 drm_mode->vtotal *= 2; 523 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 524 } 525 526 drm_mode_set_name(drm_mode); 527 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 528 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 529 else 530 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 531 532 return drm_mode; 533 } 534 EXPORT_SYMBOL(drm_gtf_mode_complex); 535 536 /** 537 * drm_gtf_mode - create the modeline based on the GTF algorithm 538 * @dev: drm device 539 * @hdisplay: hdisplay size 540 * @vdisplay: vdisplay size 541 * @vrefresh: vrefresh rate. 542 * @interlaced: whether to compute an interlaced mode 543 * @margins: desired margin (borders) size 544 * 545 * return the modeline based on GTF algorithm 546 * 547 * This function is to create the modeline based on the GTF algorithm. 548 * Generalized Timing Formula is derived from: 549 * 550 * GTF Spreadsheet by Andy Morrish (1/5/97) 551 * available at http://www.vesa.org 552 * 553 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 554 * What I have done is to translate it by using integer calculation. 555 * I also refer to the function of fb_get_mode in the file of 556 * drivers/video/fbmon.c 557 * 558 * Standard GTF parameters:: 559 * 560 * M = 600 561 * C = 40 562 * K = 128 563 * J = 20 564 * 565 * Returns: 566 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 567 * The display mode object is allocated with drm_mode_create(). Returns NULL 568 * when no mode could be allocated. 569 */ 570 struct drm_display_mode * 571 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 572 bool interlaced, int margins) 573 { 574 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 575 interlaced, margins, 576 600, 40 * 2, 128, 20 * 2); 577 } 578 EXPORT_SYMBOL(drm_gtf_mode); 579 580 #ifdef CONFIG_VIDEOMODE_HELPERS 581 /** 582 * drm_display_mode_from_videomode - fill in @dmode using @vm, 583 * @vm: videomode structure to use as source 584 * @dmode: drm_display_mode structure to use as destination 585 * 586 * Fills out @dmode using the display mode specified in @vm. 587 */ 588 void drm_display_mode_from_videomode(const struct videomode *vm, 589 struct drm_display_mode *dmode) 590 { 591 dmode->hdisplay = vm->hactive; 592 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 593 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 594 dmode->htotal = dmode->hsync_end + vm->hback_porch; 595 596 dmode->vdisplay = vm->vactive; 597 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 598 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 599 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 600 601 dmode->clock = vm->pixelclock / 1000; 602 603 dmode->flags = 0; 604 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 605 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 606 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 607 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 608 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 609 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 610 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 611 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 612 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 613 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 614 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 615 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 616 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 617 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 618 drm_mode_set_name(dmode); 619 } 620 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 621 622 /** 623 * drm_display_mode_to_videomode - fill in @vm using @dmode, 624 * @dmode: drm_display_mode structure to use as source 625 * @vm: videomode structure to use as destination 626 * 627 * Fills out @vm using the display mode specified in @dmode. 628 */ 629 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 630 struct videomode *vm) 631 { 632 vm->hactive = dmode->hdisplay; 633 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 634 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 635 vm->hback_porch = dmode->htotal - dmode->hsync_end; 636 637 vm->vactive = dmode->vdisplay; 638 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 639 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 640 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 641 642 vm->pixelclock = dmode->clock * 1000; 643 644 vm->flags = 0; 645 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 646 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 647 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 648 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 649 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 650 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 651 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 652 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 653 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 654 vm->flags |= DISPLAY_FLAGS_INTERLACED; 655 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 656 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 657 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 658 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 659 } 660 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 661 662 /** 663 * drm_bus_flags_from_videomode - extract information about pixelclk and 664 * DE polarity from videomode and store it in a separate variable 665 * @vm: videomode structure to use 666 * @bus_flags: information about pixelclk, sync and DE polarity will be stored 667 * here 668 * 669 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH), DRM_BUS_FLAG_PIXDATA_DRIVE_(POS|NEG)EDGE 670 * and DISPLAY_FLAGS_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS 671 * 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_DRIVE_POSEDGE; 678 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 679 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; 680 681 if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE) 682 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE; 683 if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE) 684 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE; 685 686 if (vm->flags & DISPLAY_FLAGS_DE_LOW) 687 *bus_flags |= DRM_BUS_FLAG_DE_LOW; 688 if (vm->flags & DISPLAY_FLAGS_DE_HIGH) 689 *bus_flags |= DRM_BUS_FLAG_DE_HIGH; 690 } 691 EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); 692 693 #ifdef CONFIG_OF 694 /** 695 * of_get_drm_display_mode - get a drm_display_mode from devicetree 696 * @np: device_node with the timing specification 697 * @dmode: will be set to the return value 698 * @bus_flags: information about pixelclk, sync and DE polarity 699 * @index: index into the list of display timings in devicetree 700 * 701 * This function is expensive and should only be used, if only one mode is to be 702 * read from DT. To get multiple modes start with of_get_display_timings and 703 * work with that instead. 704 * 705 * Returns: 706 * 0 on success, a negative errno code when no of videomode node was found. 707 */ 708 int of_get_drm_display_mode(struct device_node *np, 709 struct drm_display_mode *dmode, u32 *bus_flags, 710 int index) 711 { 712 struct videomode vm; 713 int ret; 714 715 ret = of_get_videomode(np, &vm, index); 716 if (ret) 717 return ret; 718 719 drm_display_mode_from_videomode(&vm, dmode); 720 if (bus_flags) 721 drm_bus_flags_from_videomode(&vm, bus_flags); 722 723 pr_debug("%pOF: got %dx%d display mode\n", 724 np, vm.hactive, vm.vactive); 725 drm_mode_debug_printmodeline(dmode); 726 727 return 0; 728 } 729 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 730 #endif /* CONFIG_OF */ 731 #endif /* CONFIG_VIDEOMODE_HELPERS */ 732 733 /** 734 * drm_mode_set_name - set the name on a mode 735 * @mode: name will be set in this mode 736 * 737 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 738 * with an optional 'i' suffix for interlaced modes. 739 */ 740 void drm_mode_set_name(struct drm_display_mode *mode) 741 { 742 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 743 744 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 745 mode->hdisplay, mode->vdisplay, 746 interlaced ? "i" : ""); 747 } 748 EXPORT_SYMBOL(drm_mode_set_name); 749 750 /** 751 * drm_mode_vrefresh - get the vrefresh of a mode 752 * @mode: mode 753 * 754 * Returns: 755 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 756 * value first if it is not yet set. 757 */ 758 int drm_mode_vrefresh(const struct drm_display_mode *mode) 759 { 760 int refresh = 0; 761 762 if (mode->vrefresh > 0) 763 refresh = mode->vrefresh; 764 else if (mode->htotal > 0 && mode->vtotal > 0) { 765 unsigned int num, den; 766 767 num = mode->clock * 1000; 768 den = mode->htotal * mode->vtotal; 769 770 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 771 num *= 2; 772 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 773 den *= 2; 774 if (mode->vscan > 1) 775 den *= mode->vscan; 776 777 refresh = DIV_ROUND_CLOSEST(num, den); 778 } 779 return refresh; 780 } 781 EXPORT_SYMBOL(drm_mode_vrefresh); 782 783 /** 784 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode 785 * @mode: mode to query 786 * @hdisplay: hdisplay value to fill in 787 * @vdisplay: vdisplay value to fill in 788 * 789 * The vdisplay value will be doubled if the specified mode is a stereo mode of 790 * the appropriate layout. 791 */ 792 void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 793 int *hdisplay, int *vdisplay) 794 { 795 struct drm_display_mode adjusted = *mode; 796 797 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 798 *hdisplay = adjusted.crtc_hdisplay; 799 *vdisplay = adjusted.crtc_vdisplay; 800 } 801 EXPORT_SYMBOL(drm_mode_get_hv_timing); 802 803 /** 804 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 805 * @p: mode 806 * @adjust_flags: a combination of adjustment flags 807 * 808 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 809 * 810 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 811 * interlaced modes. 812 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 813 * buffers containing two eyes (only adjust the timings when needed, eg. for 814 * "frame packing" or "side by side full"). 815 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 816 * be performed for doublescan and vscan > 1 modes respectively. 817 */ 818 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 819 { 820 if (!p) 821 return; 822 823 p->crtc_clock = p->clock; 824 p->crtc_hdisplay = p->hdisplay; 825 p->crtc_hsync_start = p->hsync_start; 826 p->crtc_hsync_end = p->hsync_end; 827 p->crtc_htotal = p->htotal; 828 p->crtc_hskew = p->hskew; 829 p->crtc_vdisplay = p->vdisplay; 830 p->crtc_vsync_start = p->vsync_start; 831 p->crtc_vsync_end = p->vsync_end; 832 p->crtc_vtotal = p->vtotal; 833 834 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 835 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 836 p->crtc_vdisplay /= 2; 837 p->crtc_vsync_start /= 2; 838 p->crtc_vsync_end /= 2; 839 p->crtc_vtotal /= 2; 840 } 841 } 842 843 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 844 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 845 p->crtc_vdisplay *= 2; 846 p->crtc_vsync_start *= 2; 847 p->crtc_vsync_end *= 2; 848 p->crtc_vtotal *= 2; 849 } 850 } 851 852 if (!(adjust_flags & CRTC_NO_VSCAN)) { 853 if (p->vscan > 1) { 854 p->crtc_vdisplay *= p->vscan; 855 p->crtc_vsync_start *= p->vscan; 856 p->crtc_vsync_end *= p->vscan; 857 p->crtc_vtotal *= p->vscan; 858 } 859 } 860 861 if (adjust_flags & CRTC_STEREO_DOUBLE) { 862 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 863 864 switch (layout) { 865 case DRM_MODE_FLAG_3D_FRAME_PACKING: 866 p->crtc_clock *= 2; 867 p->crtc_vdisplay += p->crtc_vtotal; 868 p->crtc_vsync_start += p->crtc_vtotal; 869 p->crtc_vsync_end += p->crtc_vtotal; 870 p->crtc_vtotal += p->crtc_vtotal; 871 break; 872 } 873 } 874 875 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 876 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 877 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 878 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 879 } 880 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 881 882 /** 883 * drm_mode_copy - copy the mode 884 * @dst: mode to overwrite 885 * @src: mode to copy 886 * 887 * Copy an existing mode into another mode, preserving the object id and 888 * list head of the destination mode. 889 */ 890 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 891 { 892 struct list_head head = dst->head; 893 894 *dst = *src; 895 dst->head = head; 896 } 897 EXPORT_SYMBOL(drm_mode_copy); 898 899 /** 900 * drm_mode_duplicate - allocate and duplicate an existing mode 901 * @dev: drm_device to allocate the duplicated mode for 902 * @mode: mode to duplicate 903 * 904 * Just allocate a new mode, copy the existing mode into it, and return 905 * a pointer to it. Used to create new instances of established modes. 906 * 907 * Returns: 908 * Pointer to duplicated mode on success, NULL on error. 909 */ 910 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 911 const struct drm_display_mode *mode) 912 { 913 struct drm_display_mode *nmode; 914 915 nmode = drm_mode_create(dev); 916 if (!nmode) 917 return NULL; 918 919 drm_mode_copy(nmode, mode); 920 921 return nmode; 922 } 923 EXPORT_SYMBOL(drm_mode_duplicate); 924 925 static bool drm_mode_match_timings(const struct drm_display_mode *mode1, 926 const struct drm_display_mode *mode2) 927 { 928 return mode1->hdisplay == mode2->hdisplay && 929 mode1->hsync_start == mode2->hsync_start && 930 mode1->hsync_end == mode2->hsync_end && 931 mode1->htotal == mode2->htotal && 932 mode1->hskew == mode2->hskew && 933 mode1->vdisplay == mode2->vdisplay && 934 mode1->vsync_start == mode2->vsync_start && 935 mode1->vsync_end == mode2->vsync_end && 936 mode1->vtotal == mode2->vtotal && 937 mode1->vscan == mode2->vscan; 938 } 939 940 static bool drm_mode_match_clock(const struct drm_display_mode *mode1, 941 const struct drm_display_mode *mode2) 942 { 943 /* 944 * do clock check convert to PICOS 945 * so fb modes get matched the same 946 */ 947 if (mode1->clock && mode2->clock) 948 return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock); 949 else 950 return mode1->clock == mode2->clock; 951 } 952 953 static bool drm_mode_match_flags(const struct drm_display_mode *mode1, 954 const struct drm_display_mode *mode2) 955 { 956 return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 957 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK); 958 } 959 960 static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1, 961 const struct drm_display_mode *mode2) 962 { 963 return (mode1->flags & DRM_MODE_FLAG_3D_MASK) == 964 (mode2->flags & DRM_MODE_FLAG_3D_MASK); 965 } 966 967 static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1, 968 const struct drm_display_mode *mode2) 969 { 970 return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio; 971 } 972 973 /** 974 * drm_mode_match - test modes for (partial) equality 975 * @mode1: first mode 976 * @mode2: second mode 977 * @match_flags: which parts need to match (DRM_MODE_MATCH_*) 978 * 979 * Check to see if @mode1 and @mode2 are equivalent. 980 * 981 * Returns: 982 * True if the modes are (partially) equal, false otherwise. 983 */ 984 bool drm_mode_match(const struct drm_display_mode *mode1, 985 const struct drm_display_mode *mode2, 986 unsigned int match_flags) 987 { 988 if (!mode1 && !mode2) 989 return true; 990 991 if (!mode1 || !mode2) 992 return false; 993 994 if (match_flags & DRM_MODE_MATCH_TIMINGS && 995 !drm_mode_match_timings(mode1, mode2)) 996 return false; 997 998 if (match_flags & DRM_MODE_MATCH_CLOCK && 999 !drm_mode_match_clock(mode1, mode2)) 1000 return false; 1001 1002 if (match_flags & DRM_MODE_MATCH_FLAGS && 1003 !drm_mode_match_flags(mode1, mode2)) 1004 return false; 1005 1006 if (match_flags & DRM_MODE_MATCH_3D_FLAGS && 1007 !drm_mode_match_3d_flags(mode1, mode2)) 1008 return false; 1009 1010 if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO && 1011 !drm_mode_match_aspect_ratio(mode1, mode2)) 1012 return false; 1013 1014 return true; 1015 } 1016 EXPORT_SYMBOL(drm_mode_match); 1017 1018 /** 1019 * drm_mode_equal - test modes for equality 1020 * @mode1: first mode 1021 * @mode2: second mode 1022 * 1023 * Check to see if @mode1 and @mode2 are equivalent. 1024 * 1025 * Returns: 1026 * True if the modes are equal, false otherwise. 1027 */ 1028 bool drm_mode_equal(const struct drm_display_mode *mode1, 1029 const struct drm_display_mode *mode2) 1030 { 1031 return drm_mode_match(mode1, mode2, 1032 DRM_MODE_MATCH_TIMINGS | 1033 DRM_MODE_MATCH_CLOCK | 1034 DRM_MODE_MATCH_FLAGS | 1035 DRM_MODE_MATCH_3D_FLAGS| 1036 DRM_MODE_MATCH_ASPECT_RATIO); 1037 } 1038 EXPORT_SYMBOL(drm_mode_equal); 1039 1040 /** 1041 * drm_mode_equal_no_clocks - test modes for equality 1042 * @mode1: first mode 1043 * @mode2: second mode 1044 * 1045 * Check to see if @mode1 and @mode2 are equivalent, but 1046 * don't check the pixel clocks. 1047 * 1048 * Returns: 1049 * True if the modes are equal, false otherwise. 1050 */ 1051 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, 1052 const struct drm_display_mode *mode2) 1053 { 1054 return drm_mode_match(mode1, mode2, 1055 DRM_MODE_MATCH_TIMINGS | 1056 DRM_MODE_MATCH_FLAGS | 1057 DRM_MODE_MATCH_3D_FLAGS); 1058 } 1059 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 1060 1061 /** 1062 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 1063 * @mode1: first mode 1064 * @mode2: second mode 1065 * 1066 * Check to see if @mode1 and @mode2 are equivalent, but 1067 * don't check the pixel clocks nor the stereo layout. 1068 * 1069 * Returns: 1070 * True if the modes are equal, false otherwise. 1071 */ 1072 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 1073 const struct drm_display_mode *mode2) 1074 { 1075 return drm_mode_match(mode1, mode2, 1076 DRM_MODE_MATCH_TIMINGS | 1077 DRM_MODE_MATCH_FLAGS); 1078 } 1079 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1080 1081 static enum drm_mode_status 1082 drm_mode_validate_basic(const struct drm_display_mode *mode) 1083 { 1084 if (mode->type & ~DRM_MODE_TYPE_ALL) 1085 return MODE_BAD; 1086 1087 if (mode->flags & ~DRM_MODE_FLAG_ALL) 1088 return MODE_BAD; 1089 1090 if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1091 return MODE_BAD; 1092 1093 if (mode->clock == 0) 1094 return MODE_CLOCK_LOW; 1095 1096 if (mode->hdisplay == 0 || 1097 mode->hsync_start < mode->hdisplay || 1098 mode->hsync_end < mode->hsync_start || 1099 mode->htotal < mode->hsync_end) 1100 return MODE_H_ILLEGAL; 1101 1102 if (mode->vdisplay == 0 || 1103 mode->vsync_start < mode->vdisplay || 1104 mode->vsync_end < mode->vsync_start || 1105 mode->vtotal < mode->vsync_end) 1106 return MODE_V_ILLEGAL; 1107 1108 return MODE_OK; 1109 } 1110 1111 /** 1112 * drm_mode_validate_driver - make sure the mode is somewhat sane 1113 * @dev: drm device 1114 * @mode: mode to check 1115 * 1116 * First do basic validation on the mode, and then allow the driver 1117 * to check for device/driver specific limitations via the optional 1118 * &drm_mode_config_helper_funcs.mode_valid hook. 1119 * 1120 * Returns: 1121 * The mode status 1122 */ 1123 enum drm_mode_status 1124 drm_mode_validate_driver(struct drm_device *dev, 1125 const struct drm_display_mode *mode) 1126 { 1127 enum drm_mode_status status; 1128 1129 status = drm_mode_validate_basic(mode); 1130 if (status != MODE_OK) 1131 return status; 1132 1133 if (dev->mode_config.funcs->mode_valid) 1134 return dev->mode_config.funcs->mode_valid(dev, mode); 1135 else 1136 return MODE_OK; 1137 } 1138 EXPORT_SYMBOL(drm_mode_validate_driver); 1139 1140 /** 1141 * drm_mode_validate_size - make sure modes adhere to size constraints 1142 * @mode: mode to check 1143 * @maxX: maximum width 1144 * @maxY: maximum height 1145 * 1146 * This function is a helper which can be used to validate modes against size 1147 * limitations of the DRM device/connector. If a mode is too big its status 1148 * member is updated with the appropriate validation failure code. The list 1149 * itself is not changed. 1150 * 1151 * Returns: 1152 * The mode status 1153 */ 1154 enum drm_mode_status 1155 drm_mode_validate_size(const struct drm_display_mode *mode, 1156 int maxX, int maxY) 1157 { 1158 if (maxX > 0 && mode->hdisplay > maxX) 1159 return MODE_VIRTUAL_X; 1160 1161 if (maxY > 0 && mode->vdisplay > maxY) 1162 return MODE_VIRTUAL_Y; 1163 1164 return MODE_OK; 1165 } 1166 EXPORT_SYMBOL(drm_mode_validate_size); 1167 1168 /** 1169 * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed 1170 * @mode: mode to check 1171 * @connector: drm connector under action 1172 * 1173 * This function is a helper which can be used to filter out any YCBCR420 1174 * only mode, when the source doesn't support it. 1175 * 1176 * Returns: 1177 * The mode status 1178 */ 1179 enum drm_mode_status 1180 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode, 1181 struct drm_connector *connector) 1182 { 1183 u8 vic = drm_match_cea_mode(mode); 1184 enum drm_mode_status status = MODE_OK; 1185 struct drm_hdmi_info *hdmi = &connector->display_info.hdmi; 1186 1187 if (test_bit(vic, hdmi->y420_vdb_modes)) { 1188 if (!connector->ycbcr_420_allowed) 1189 status = MODE_NO_420; 1190 } 1191 1192 return status; 1193 } 1194 EXPORT_SYMBOL(drm_mode_validate_ycbcr420); 1195 1196 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1197 1198 static const char * const drm_mode_status_names[] = { 1199 MODE_STATUS(OK), 1200 MODE_STATUS(HSYNC), 1201 MODE_STATUS(VSYNC), 1202 MODE_STATUS(H_ILLEGAL), 1203 MODE_STATUS(V_ILLEGAL), 1204 MODE_STATUS(BAD_WIDTH), 1205 MODE_STATUS(NOMODE), 1206 MODE_STATUS(NO_INTERLACE), 1207 MODE_STATUS(NO_DBLESCAN), 1208 MODE_STATUS(NO_VSCAN), 1209 MODE_STATUS(MEM), 1210 MODE_STATUS(VIRTUAL_X), 1211 MODE_STATUS(VIRTUAL_Y), 1212 MODE_STATUS(MEM_VIRT), 1213 MODE_STATUS(NOCLOCK), 1214 MODE_STATUS(CLOCK_HIGH), 1215 MODE_STATUS(CLOCK_LOW), 1216 MODE_STATUS(CLOCK_RANGE), 1217 MODE_STATUS(BAD_HVALUE), 1218 MODE_STATUS(BAD_VVALUE), 1219 MODE_STATUS(BAD_VSCAN), 1220 MODE_STATUS(HSYNC_NARROW), 1221 MODE_STATUS(HSYNC_WIDE), 1222 MODE_STATUS(HBLANK_NARROW), 1223 MODE_STATUS(HBLANK_WIDE), 1224 MODE_STATUS(VSYNC_NARROW), 1225 MODE_STATUS(VSYNC_WIDE), 1226 MODE_STATUS(VBLANK_NARROW), 1227 MODE_STATUS(VBLANK_WIDE), 1228 MODE_STATUS(PANEL), 1229 MODE_STATUS(INTERLACE_WIDTH), 1230 MODE_STATUS(ONE_WIDTH), 1231 MODE_STATUS(ONE_HEIGHT), 1232 MODE_STATUS(ONE_SIZE), 1233 MODE_STATUS(NO_REDUCED), 1234 MODE_STATUS(NO_STEREO), 1235 MODE_STATUS(NO_420), 1236 MODE_STATUS(STALE), 1237 MODE_STATUS(BAD), 1238 MODE_STATUS(ERROR), 1239 }; 1240 1241 #undef MODE_STATUS 1242 1243 const char *drm_get_mode_status_name(enum drm_mode_status status) 1244 { 1245 int index = status + 3; 1246 1247 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1248 return ""; 1249 1250 return drm_mode_status_names[index]; 1251 } 1252 1253 /** 1254 * drm_mode_prune_invalid - remove invalid modes from mode list 1255 * @dev: DRM device 1256 * @mode_list: list of modes to check 1257 * @verbose: be verbose about it 1258 * 1259 * This helper function can be used to prune a display mode list after 1260 * validation has been completed. All modes whose status is not MODE_OK will be 1261 * removed from the list, and if @verbose the status code and mode name is also 1262 * printed to dmesg. 1263 */ 1264 void drm_mode_prune_invalid(struct drm_device *dev, 1265 struct list_head *mode_list, bool verbose) 1266 { 1267 struct drm_display_mode *mode, *t; 1268 1269 list_for_each_entry_safe(mode, t, mode_list, head) { 1270 if (mode->status != MODE_OK) { 1271 list_del(&mode->head); 1272 if (verbose) { 1273 drm_mode_debug_printmodeline(mode); 1274 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1275 mode->name, 1276 drm_get_mode_status_name(mode->status)); 1277 } 1278 drm_mode_destroy(dev, mode); 1279 } 1280 } 1281 } 1282 EXPORT_SYMBOL(drm_mode_prune_invalid); 1283 1284 /** 1285 * drm_mode_compare - compare modes for favorability 1286 * @priv: unused 1287 * @lh_a: list_head for first mode 1288 * @lh_b: list_head for second mode 1289 * 1290 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1291 * which is better. 1292 * 1293 * Returns: 1294 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1295 * positive if @lh_b is better than @lh_a. 1296 */ 1297 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) 1298 { 1299 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1300 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1301 int diff; 1302 1303 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1304 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1305 if (diff) 1306 return diff; 1307 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1308 if (diff) 1309 return diff; 1310 1311 diff = b->vrefresh - a->vrefresh; 1312 if (diff) 1313 return diff; 1314 1315 diff = b->clock - a->clock; 1316 return diff; 1317 } 1318 1319 /** 1320 * drm_mode_sort - sort mode list 1321 * @mode_list: list of drm_display_mode structures to sort 1322 * 1323 * Sort @mode_list by favorability, moving good modes to the head of the list. 1324 */ 1325 void drm_mode_sort(struct list_head *mode_list) 1326 { 1327 list_sort(NULL, mode_list, drm_mode_compare); 1328 } 1329 EXPORT_SYMBOL(drm_mode_sort); 1330 1331 /** 1332 * drm_connector_list_update - update the mode list for the connector 1333 * @connector: the connector to update 1334 * 1335 * This moves the modes from the @connector probed_modes list 1336 * to the actual mode list. It compares the probed mode against the current 1337 * list and only adds different/new modes. 1338 * 1339 * This is just a helper functions doesn't validate any modes itself and also 1340 * doesn't prune any invalid modes. Callers need to do that themselves. 1341 */ 1342 void drm_connector_list_update(struct drm_connector *connector) 1343 { 1344 struct drm_display_mode *pmode, *pt; 1345 1346 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1347 1348 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1349 struct drm_display_mode *mode; 1350 bool found_it = false; 1351 1352 /* go through current modes checking for the new probed mode */ 1353 list_for_each_entry(mode, &connector->modes, head) { 1354 if (!drm_mode_equal(pmode, mode)) 1355 continue; 1356 1357 found_it = true; 1358 1359 /* 1360 * If the old matching mode is stale (ie. left over 1361 * from a previous probe) just replace it outright. 1362 * Otherwise just merge the type bits between all 1363 * equal probed modes. 1364 * 1365 * If two probed modes are considered equal, pick the 1366 * actual timings from the one that's marked as 1367 * preferred (in case the match isn't 100%). If 1368 * multiple or zero preferred modes are present, favor 1369 * the mode added to the probed_modes list first. 1370 */ 1371 if (mode->status == MODE_STALE) { 1372 drm_mode_copy(mode, pmode); 1373 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1374 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1375 pmode->type |= mode->type; 1376 drm_mode_copy(mode, pmode); 1377 } else { 1378 mode->type |= pmode->type; 1379 } 1380 1381 list_del(&pmode->head); 1382 drm_mode_destroy(connector->dev, pmode); 1383 break; 1384 } 1385 1386 if (!found_it) { 1387 list_move_tail(&pmode->head, &connector->modes); 1388 } 1389 } 1390 } 1391 EXPORT_SYMBOL(drm_connector_list_update); 1392 1393 static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, 1394 struct drm_cmdline_mode *mode) 1395 { 1396 unsigned int bpp; 1397 1398 if (str[0] != '-') 1399 return -EINVAL; 1400 1401 str++; 1402 bpp = simple_strtol(str, end_ptr, 10); 1403 if (*end_ptr == str) 1404 return -EINVAL; 1405 1406 mode->bpp = bpp; 1407 mode->bpp_specified = true; 1408 1409 return 0; 1410 } 1411 1412 static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, 1413 struct drm_cmdline_mode *mode) 1414 { 1415 unsigned int refresh; 1416 1417 if (str[0] != '@') 1418 return -EINVAL; 1419 1420 str++; 1421 refresh = simple_strtol(str, end_ptr, 10); 1422 if (*end_ptr == str) 1423 return -EINVAL; 1424 1425 mode->refresh = refresh; 1426 mode->refresh_specified = true; 1427 1428 return 0; 1429 } 1430 1431 static int drm_mode_parse_cmdline_extra(const char *str, int length, 1432 bool freestanding, 1433 const struct drm_connector *connector, 1434 struct drm_cmdline_mode *mode) 1435 { 1436 int i; 1437 1438 for (i = 0; i < length; i++) { 1439 switch (str[i]) { 1440 case 'i': 1441 if (freestanding) 1442 return -EINVAL; 1443 1444 mode->interlace = true; 1445 break; 1446 case 'm': 1447 if (freestanding) 1448 return -EINVAL; 1449 1450 mode->margins = true; 1451 break; 1452 case 'D': 1453 if (mode->force != DRM_FORCE_UNSPECIFIED) 1454 return -EINVAL; 1455 1456 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1457 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1458 mode->force = DRM_FORCE_ON; 1459 else 1460 mode->force = DRM_FORCE_ON_DIGITAL; 1461 break; 1462 case 'd': 1463 if (mode->force != DRM_FORCE_UNSPECIFIED) 1464 return -EINVAL; 1465 1466 mode->force = DRM_FORCE_OFF; 1467 break; 1468 case 'e': 1469 if (mode->force != DRM_FORCE_UNSPECIFIED) 1470 return -EINVAL; 1471 1472 mode->force = DRM_FORCE_ON; 1473 break; 1474 default: 1475 return -EINVAL; 1476 } 1477 } 1478 1479 return 0; 1480 } 1481 1482 static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, 1483 bool extras, 1484 const struct drm_connector *connector, 1485 struct drm_cmdline_mode *mode) 1486 { 1487 const char *str_start = str; 1488 bool rb = false, cvt = false; 1489 int xres = 0, yres = 0; 1490 int remaining, i; 1491 char *end_ptr; 1492 1493 xres = simple_strtol(str, &end_ptr, 10); 1494 if (end_ptr == str) 1495 return -EINVAL; 1496 1497 if (end_ptr[0] != 'x') 1498 return -EINVAL; 1499 end_ptr++; 1500 1501 str = end_ptr; 1502 yres = simple_strtol(str, &end_ptr, 10); 1503 if (end_ptr == str) 1504 return -EINVAL; 1505 1506 remaining = length - (end_ptr - str_start); 1507 if (remaining < 0) 1508 return -EINVAL; 1509 1510 for (i = 0; i < remaining; i++) { 1511 switch (end_ptr[i]) { 1512 case 'M': 1513 cvt = true; 1514 break; 1515 case 'R': 1516 rb = true; 1517 break; 1518 default: 1519 /* 1520 * Try to pass that to our extras parsing 1521 * function to handle the case where the 1522 * extras are directly after the resolution 1523 */ 1524 if (extras) { 1525 int ret = drm_mode_parse_cmdline_extra(end_ptr + i, 1526 1, 1527 false, 1528 connector, 1529 mode); 1530 if (ret) 1531 return ret; 1532 } else { 1533 return -EINVAL; 1534 } 1535 } 1536 } 1537 1538 mode->xres = xres; 1539 mode->yres = yres; 1540 mode->cvt = cvt; 1541 mode->rb = rb; 1542 1543 return 0; 1544 } 1545 1546 static int drm_mode_parse_cmdline_int(const char *delim, unsigned int *int_ret) 1547 { 1548 const char *value; 1549 char *endp; 1550 1551 /* 1552 * delim must point to the '=', otherwise it is a syntax error and 1553 * if delim points to the terminating zero, then delim + 1 wil point 1554 * past the end of the string. 1555 */ 1556 if (*delim != '=') 1557 return -EINVAL; 1558 1559 value = delim + 1; 1560 *int_ret = simple_strtol(value, &endp, 10); 1561 1562 /* Make sure we have parsed something */ 1563 if (endp == value) 1564 return -EINVAL; 1565 1566 return 0; 1567 } 1568 1569 static int drm_mode_parse_panel_orientation(const char *delim, 1570 struct drm_cmdline_mode *mode) 1571 { 1572 const char *value; 1573 1574 if (*delim != '=') 1575 return -EINVAL; 1576 1577 value = delim + 1; 1578 delim = strchr(value, ','); 1579 if (!delim) 1580 delim = value + strlen(value); 1581 1582 if (!strncmp(value, "normal", delim - value)) 1583 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL; 1584 else if (!strncmp(value, "upside_down", delim - value)) 1585 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP; 1586 else if (!strncmp(value, "left_side_up", delim - value)) 1587 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP; 1588 else if (!strncmp(value, "right_side_up", delim - value)) 1589 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP; 1590 else 1591 return -EINVAL; 1592 1593 return 0; 1594 } 1595 1596 static int drm_mode_parse_cmdline_options(const char *str, 1597 bool freestanding, 1598 const struct drm_connector *connector, 1599 struct drm_cmdline_mode *mode) 1600 { 1601 unsigned int deg, margin, rotation = 0; 1602 const char *delim, *option, *sep; 1603 1604 option = str; 1605 do { 1606 delim = strchr(option, '='); 1607 if (!delim) { 1608 delim = strchr(option, ','); 1609 1610 if (!delim) 1611 delim = option + strlen(option); 1612 } 1613 1614 if (!strncmp(option, "rotate", delim - option)) { 1615 if (drm_mode_parse_cmdline_int(delim, °)) 1616 return -EINVAL; 1617 1618 switch (deg) { 1619 case 0: 1620 rotation |= DRM_MODE_ROTATE_0; 1621 break; 1622 1623 case 90: 1624 rotation |= DRM_MODE_ROTATE_90; 1625 break; 1626 1627 case 180: 1628 rotation |= DRM_MODE_ROTATE_180; 1629 break; 1630 1631 case 270: 1632 rotation |= DRM_MODE_ROTATE_270; 1633 break; 1634 1635 default: 1636 return -EINVAL; 1637 } 1638 } else if (!strncmp(option, "reflect_x", delim - option)) { 1639 rotation |= DRM_MODE_REFLECT_X; 1640 } else if (!strncmp(option, "reflect_y", delim - option)) { 1641 rotation |= DRM_MODE_REFLECT_Y; 1642 } else if (!strncmp(option, "margin_right", delim - option)) { 1643 if (drm_mode_parse_cmdline_int(delim, &margin)) 1644 return -EINVAL; 1645 1646 mode->tv_margins.right = margin; 1647 } else if (!strncmp(option, "margin_left", delim - option)) { 1648 if (drm_mode_parse_cmdline_int(delim, &margin)) 1649 return -EINVAL; 1650 1651 mode->tv_margins.left = margin; 1652 } else if (!strncmp(option, "margin_top", delim - option)) { 1653 if (drm_mode_parse_cmdline_int(delim, &margin)) 1654 return -EINVAL; 1655 1656 mode->tv_margins.top = margin; 1657 } else if (!strncmp(option, "margin_bottom", delim - option)) { 1658 if (drm_mode_parse_cmdline_int(delim, &margin)) 1659 return -EINVAL; 1660 1661 mode->tv_margins.bottom = margin; 1662 } else if (!strncmp(option, "panel_orientation", delim - option)) { 1663 if (drm_mode_parse_panel_orientation(delim, mode)) 1664 return -EINVAL; 1665 } else { 1666 return -EINVAL; 1667 } 1668 sep = strchr(delim, ','); 1669 option = sep + 1; 1670 } while (sep); 1671 1672 if (rotation && freestanding) 1673 return -EINVAL; 1674 1675 if (!(rotation & DRM_MODE_ROTATE_MASK)) 1676 rotation |= DRM_MODE_ROTATE_0; 1677 1678 /* Make sure there is exactly one rotation defined */ 1679 if (!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK)) 1680 return -EINVAL; 1681 1682 mode->rotation_reflection = rotation; 1683 1684 return 0; 1685 } 1686 1687 static const char * const drm_named_modes_whitelist[] = { 1688 "NTSC", 1689 "PAL", 1690 }; 1691 1692 /** 1693 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1694 * @mode_option: optional per connector mode option 1695 * @connector: connector to parse modeline for 1696 * @mode: preallocated drm_cmdline_mode structure to fill out 1697 * 1698 * This parses @mode_option command line modeline for modes and options to 1699 * configure the connector. If @mode_option is NULL the default command line 1700 * modeline in fb_mode_option will be parsed instead. 1701 * 1702 * This uses the same parameters as the fb modedb.c, except for an extra 1703 * force-enable, force-enable-digital and force-disable bit at the end:: 1704 * 1705 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1706 * 1707 * Additionals options can be provided following the mode, using a comma to 1708 * separate each option. Valid options can be found in 1709 * Documentation/fb/modedb.rst. 1710 * 1711 * The intermediate drm_cmdline_mode structure is required to store additional 1712 * options from the command line modline like the force-enable/disable flag. 1713 * 1714 * Returns: 1715 * True if a valid modeline has been parsed, false otherwise. 1716 */ 1717 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1718 const struct drm_connector *connector, 1719 struct drm_cmdline_mode *mode) 1720 { 1721 const char *name; 1722 bool freestanding = false, parse_extras = false; 1723 unsigned int bpp_off = 0, refresh_off = 0, options_off = 0; 1724 unsigned int mode_end = 0; 1725 const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; 1726 const char *options_ptr = NULL; 1727 char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; 1728 int i, len, ret; 1729 1730 memset(mode, 0, sizeof(*mode)); 1731 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 1732 1733 if (!mode_option) 1734 return false; 1735 1736 name = mode_option; 1737 1738 /* Try to locate the bpp and refresh specifiers, if any */ 1739 bpp_ptr = strchr(name, '-'); 1740 if (bpp_ptr) 1741 bpp_off = bpp_ptr - name; 1742 1743 refresh_ptr = strchr(name, '@'); 1744 if (refresh_ptr) 1745 refresh_off = refresh_ptr - name; 1746 1747 /* Locate the start of named options */ 1748 options_ptr = strchr(name, ','); 1749 if (options_ptr) 1750 options_off = options_ptr - name; 1751 1752 /* Locate the end of the name / resolution, and parse it */ 1753 if (bpp_ptr) { 1754 mode_end = bpp_off; 1755 } else if (refresh_ptr) { 1756 mode_end = refresh_off; 1757 } else if (options_ptr) { 1758 mode_end = options_off; 1759 parse_extras = true; 1760 } else { 1761 mode_end = strlen(name); 1762 parse_extras = true; 1763 } 1764 1765 /* First check for a named mode */ 1766 for (i = 0; i < ARRAY_SIZE(drm_named_modes_whitelist); i++) { 1767 ret = str_has_prefix(name, drm_named_modes_whitelist[i]); 1768 if (ret == mode_end) { 1769 if (refresh_ptr) 1770 return false; /* named + refresh is invalid */ 1771 1772 strcpy(mode->name, drm_named_modes_whitelist[i]); 1773 mode->specified = true; 1774 break; 1775 } 1776 } 1777 1778 /* No named mode? Check for a normal mode argument, e.g. 1024x768 */ 1779 if (!mode->specified && isdigit(name[0])) { 1780 ret = drm_mode_parse_cmdline_res_mode(name, mode_end, 1781 parse_extras, 1782 connector, 1783 mode); 1784 if (ret) 1785 return false; 1786 1787 mode->specified = true; 1788 } 1789 1790 /* No mode? Check for freestanding extras and/or options */ 1791 if (!mode->specified) { 1792 unsigned int len = strlen(mode_option); 1793 1794 if (bpp_ptr || refresh_ptr) 1795 return false; /* syntax error */ 1796 1797 if (len == 1 || (len >= 2 && mode_option[1] == ',')) 1798 extra_ptr = mode_option; 1799 else 1800 options_ptr = mode_option - 1; 1801 1802 freestanding = true; 1803 } 1804 1805 if (bpp_ptr) { 1806 ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); 1807 if (ret) 1808 return false; 1809 1810 mode->bpp_specified = true; 1811 } 1812 1813 if (refresh_ptr) { 1814 ret = drm_mode_parse_cmdline_refresh(refresh_ptr, 1815 &refresh_end_ptr, mode); 1816 if (ret) 1817 return false; 1818 1819 mode->refresh_specified = true; 1820 } 1821 1822 /* 1823 * Locate the end of the bpp / refresh, and parse the extras 1824 * if relevant 1825 */ 1826 if (bpp_ptr && refresh_ptr) 1827 extra_ptr = max(bpp_end_ptr, refresh_end_ptr); 1828 else if (bpp_ptr) 1829 extra_ptr = bpp_end_ptr; 1830 else if (refresh_ptr) 1831 extra_ptr = refresh_end_ptr; 1832 1833 if (extra_ptr) { 1834 if (options_ptr) 1835 len = options_ptr - extra_ptr; 1836 else 1837 len = strlen(extra_ptr); 1838 1839 ret = drm_mode_parse_cmdline_extra(extra_ptr, len, freestanding, 1840 connector, mode); 1841 if (ret) 1842 return false; 1843 } 1844 1845 if (options_ptr) { 1846 ret = drm_mode_parse_cmdline_options(options_ptr + 1, 1847 freestanding, 1848 connector, mode); 1849 if (ret) 1850 return false; 1851 } 1852 1853 return true; 1854 } 1855 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1856 1857 /** 1858 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1859 * @dev: DRM device to create the new mode for 1860 * @cmd: input command line modeline 1861 * 1862 * Returns: 1863 * Pointer to converted mode on success, NULL on error. 1864 */ 1865 struct drm_display_mode * 1866 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1867 struct drm_cmdline_mode *cmd) 1868 { 1869 struct drm_display_mode *mode; 1870 1871 if (cmd->cvt) 1872 mode = drm_cvt_mode(dev, 1873 cmd->xres, cmd->yres, 1874 cmd->refresh_specified ? cmd->refresh : 60, 1875 cmd->rb, cmd->interlace, 1876 cmd->margins); 1877 else 1878 mode = drm_gtf_mode(dev, 1879 cmd->xres, cmd->yres, 1880 cmd->refresh_specified ? cmd->refresh : 60, 1881 cmd->interlace, 1882 cmd->margins); 1883 if (!mode) 1884 return NULL; 1885 1886 mode->type |= DRM_MODE_TYPE_USERDEF; 1887 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ 1888 if (cmd->xres == 1366) 1889 drm_mode_fixup_1366x768(mode); 1890 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1891 return mode; 1892 } 1893 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1894 1895 /** 1896 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1897 * @out: drm_mode_modeinfo struct to return to the user 1898 * @in: drm_display_mode to use 1899 * 1900 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1901 * the user. 1902 */ 1903 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1904 const struct drm_display_mode *in) 1905 { 1906 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1907 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1908 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1909 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1910 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1911 "timing values too large for mode info\n"); 1912 1913 out->clock = in->clock; 1914 out->hdisplay = in->hdisplay; 1915 out->hsync_start = in->hsync_start; 1916 out->hsync_end = in->hsync_end; 1917 out->htotal = in->htotal; 1918 out->hskew = in->hskew; 1919 out->vdisplay = in->vdisplay; 1920 out->vsync_start = in->vsync_start; 1921 out->vsync_end = in->vsync_end; 1922 out->vtotal = in->vtotal; 1923 out->vscan = in->vscan; 1924 out->vrefresh = in->vrefresh; 1925 out->flags = in->flags; 1926 out->type = in->type; 1927 1928 switch (in->picture_aspect_ratio) { 1929 case HDMI_PICTURE_ASPECT_4_3: 1930 out->flags |= DRM_MODE_FLAG_PIC_AR_4_3; 1931 break; 1932 case HDMI_PICTURE_ASPECT_16_9: 1933 out->flags |= DRM_MODE_FLAG_PIC_AR_16_9; 1934 break; 1935 case HDMI_PICTURE_ASPECT_64_27: 1936 out->flags |= DRM_MODE_FLAG_PIC_AR_64_27; 1937 break; 1938 case HDMI_PICTURE_ASPECT_256_135: 1939 out->flags |= DRM_MODE_FLAG_PIC_AR_256_135; 1940 break; 1941 default: 1942 WARN(1, "Invalid aspect ratio (0%x) on mode\n", 1943 in->picture_aspect_ratio); 1944 /* fall through */ 1945 case HDMI_PICTURE_ASPECT_NONE: 1946 out->flags |= DRM_MODE_FLAG_PIC_AR_NONE; 1947 break; 1948 } 1949 1950 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1951 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1952 } 1953 1954 /** 1955 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1956 * @dev: drm device 1957 * @out: drm_display_mode to return to the user 1958 * @in: drm_mode_modeinfo to use 1959 * 1960 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1961 * the caller. 1962 * 1963 * Returns: 1964 * Zero on success, negative errno on failure. 1965 */ 1966 int drm_mode_convert_umode(struct drm_device *dev, 1967 struct drm_display_mode *out, 1968 const struct drm_mode_modeinfo *in) 1969 { 1970 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 1971 return -ERANGE; 1972 1973 out->clock = in->clock; 1974 out->hdisplay = in->hdisplay; 1975 out->hsync_start = in->hsync_start; 1976 out->hsync_end = in->hsync_end; 1977 out->htotal = in->htotal; 1978 out->hskew = in->hskew; 1979 out->vdisplay = in->vdisplay; 1980 out->vsync_start = in->vsync_start; 1981 out->vsync_end = in->vsync_end; 1982 out->vtotal = in->vtotal; 1983 out->vscan = in->vscan; 1984 out->vrefresh = in->vrefresh; 1985 out->flags = in->flags; 1986 /* 1987 * Old xf86-video-vmware (possibly others too) used to 1988 * leave 'type' unititialized. Just ignore any bits we 1989 * don't like. It's a just hint after all, and more 1990 * useful for the kernel->userspace direction anyway. 1991 */ 1992 out->type = in->type & DRM_MODE_TYPE_ALL; 1993 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1994 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1995 1996 /* Clearing picture aspect ratio bits from out flags, 1997 * as the aspect-ratio information is not stored in 1998 * flags for kernel-mode, but in picture_aspect_ratio. 1999 */ 2000 out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 2001 2002 switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) { 2003 case DRM_MODE_FLAG_PIC_AR_4_3: 2004 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3; 2005 break; 2006 case DRM_MODE_FLAG_PIC_AR_16_9: 2007 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9; 2008 break; 2009 case DRM_MODE_FLAG_PIC_AR_64_27: 2010 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27; 2011 break; 2012 case DRM_MODE_FLAG_PIC_AR_256_135: 2013 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135; 2014 break; 2015 case DRM_MODE_FLAG_PIC_AR_NONE: 2016 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE; 2017 break; 2018 default: 2019 return -EINVAL; 2020 } 2021 2022 out->status = drm_mode_validate_driver(dev, out); 2023 if (out->status != MODE_OK) 2024 return -EINVAL; 2025 2026 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 2027 2028 return 0; 2029 } 2030 2031 /** 2032 * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420 2033 * output format 2034 * 2035 * @display: display under action 2036 * @mode: video mode to be tested. 2037 * 2038 * Returns: 2039 * true if the mode can be supported in YCBCR420 format 2040 * false if not. 2041 */ 2042 bool drm_mode_is_420_only(const struct drm_display_info *display, 2043 const struct drm_display_mode *mode) 2044 { 2045 u8 vic = drm_match_cea_mode(mode); 2046 2047 return test_bit(vic, display->hdmi.y420_vdb_modes); 2048 } 2049 EXPORT_SYMBOL(drm_mode_is_420_only); 2050 2051 /** 2052 * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420 2053 * output format also (along with RGB/YCBCR444/422) 2054 * 2055 * @display: display under action. 2056 * @mode: video mode to be tested. 2057 * 2058 * Returns: 2059 * true if the mode can be support YCBCR420 format 2060 * false if not. 2061 */ 2062 bool drm_mode_is_420_also(const struct drm_display_info *display, 2063 const struct drm_display_mode *mode) 2064 { 2065 u8 vic = drm_match_cea_mode(mode); 2066 2067 return test_bit(vic, display->hdmi.y420_cmdb_modes); 2068 } 2069 EXPORT_SYMBOL(drm_mode_is_420_also); 2070 /** 2071 * drm_mode_is_420 - if a given videomode can be supported in YCBCR420 2072 * output format 2073 * 2074 * @display: display under action. 2075 * @mode: video mode to be tested. 2076 * 2077 * Returns: 2078 * true if the mode can be supported in YCBCR420 format 2079 * false if not. 2080 */ 2081 bool drm_mode_is_420(const struct drm_display_info *display, 2082 const struct drm_display_mode *mode) 2083 { 2084 return drm_mode_is_420_only(display, mode) || 2085 drm_mode_is_420_also(display, mode); 2086 } 2087 EXPORT_SYMBOL(drm_mode_is_420); 2088