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 https://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 unsigned int num, den; 761 762 if (mode->htotal == 0 || mode->vtotal == 0) 763 return 0; 764 765 num = mode->clock * 1000; 766 den = mode->htotal * mode->vtotal; 767 768 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 769 num *= 2; 770 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 771 den *= 2; 772 if (mode->vscan > 1) 773 den *= mode->vscan; 774 775 return DIV_ROUND_CLOSEST(num, den); 776 } 777 EXPORT_SYMBOL(drm_mode_vrefresh); 778 779 /** 780 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode 781 * @mode: mode to query 782 * @hdisplay: hdisplay value to fill in 783 * @vdisplay: vdisplay value to fill in 784 * 785 * The vdisplay value will be doubled if the specified mode is a stereo mode of 786 * the appropriate layout. 787 */ 788 void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 789 int *hdisplay, int *vdisplay) 790 { 791 struct drm_display_mode adjusted = *mode; 792 793 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 794 *hdisplay = adjusted.crtc_hdisplay; 795 *vdisplay = adjusted.crtc_vdisplay; 796 } 797 EXPORT_SYMBOL(drm_mode_get_hv_timing); 798 799 /** 800 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 801 * @p: mode 802 * @adjust_flags: a combination of adjustment flags 803 * 804 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 805 * 806 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 807 * interlaced modes. 808 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 809 * buffers containing two eyes (only adjust the timings when needed, eg. for 810 * "frame packing" or "side by side full"). 811 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 812 * be performed for doublescan and vscan > 1 modes respectively. 813 */ 814 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 815 { 816 if (!p) 817 return; 818 819 p->crtc_clock = p->clock; 820 p->crtc_hdisplay = p->hdisplay; 821 p->crtc_hsync_start = p->hsync_start; 822 p->crtc_hsync_end = p->hsync_end; 823 p->crtc_htotal = p->htotal; 824 p->crtc_hskew = p->hskew; 825 p->crtc_vdisplay = p->vdisplay; 826 p->crtc_vsync_start = p->vsync_start; 827 p->crtc_vsync_end = p->vsync_end; 828 p->crtc_vtotal = p->vtotal; 829 830 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 831 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 832 p->crtc_vdisplay /= 2; 833 p->crtc_vsync_start /= 2; 834 p->crtc_vsync_end /= 2; 835 p->crtc_vtotal /= 2; 836 } 837 } 838 839 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 840 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 841 p->crtc_vdisplay *= 2; 842 p->crtc_vsync_start *= 2; 843 p->crtc_vsync_end *= 2; 844 p->crtc_vtotal *= 2; 845 } 846 } 847 848 if (!(adjust_flags & CRTC_NO_VSCAN)) { 849 if (p->vscan > 1) { 850 p->crtc_vdisplay *= p->vscan; 851 p->crtc_vsync_start *= p->vscan; 852 p->crtc_vsync_end *= p->vscan; 853 p->crtc_vtotal *= p->vscan; 854 } 855 } 856 857 if (adjust_flags & CRTC_STEREO_DOUBLE) { 858 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 859 860 switch (layout) { 861 case DRM_MODE_FLAG_3D_FRAME_PACKING: 862 p->crtc_clock *= 2; 863 p->crtc_vdisplay += p->crtc_vtotal; 864 p->crtc_vsync_start += p->crtc_vtotal; 865 p->crtc_vsync_end += p->crtc_vtotal; 866 p->crtc_vtotal += p->crtc_vtotal; 867 break; 868 } 869 } 870 871 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 872 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 873 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 874 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 875 } 876 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 877 878 /** 879 * drm_mode_copy - copy the mode 880 * @dst: mode to overwrite 881 * @src: mode to copy 882 * 883 * Copy an existing mode into another mode, preserving the object id and 884 * list head of the destination mode. 885 */ 886 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 887 { 888 struct list_head head = dst->head; 889 890 *dst = *src; 891 dst->head = head; 892 } 893 EXPORT_SYMBOL(drm_mode_copy); 894 895 /** 896 * drm_mode_duplicate - allocate and duplicate an existing mode 897 * @dev: drm_device to allocate the duplicated mode for 898 * @mode: mode to duplicate 899 * 900 * Just allocate a new mode, copy the existing mode into it, and return 901 * a pointer to it. Used to create new instances of established modes. 902 * 903 * Returns: 904 * Pointer to duplicated mode on success, NULL on error. 905 */ 906 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 907 const struct drm_display_mode *mode) 908 { 909 struct drm_display_mode *nmode; 910 911 nmode = drm_mode_create(dev); 912 if (!nmode) 913 return NULL; 914 915 drm_mode_copy(nmode, mode); 916 917 return nmode; 918 } 919 EXPORT_SYMBOL(drm_mode_duplicate); 920 921 static bool drm_mode_match_timings(const struct drm_display_mode *mode1, 922 const struct drm_display_mode *mode2) 923 { 924 return mode1->hdisplay == mode2->hdisplay && 925 mode1->hsync_start == mode2->hsync_start && 926 mode1->hsync_end == mode2->hsync_end && 927 mode1->htotal == mode2->htotal && 928 mode1->hskew == mode2->hskew && 929 mode1->vdisplay == mode2->vdisplay && 930 mode1->vsync_start == mode2->vsync_start && 931 mode1->vsync_end == mode2->vsync_end && 932 mode1->vtotal == mode2->vtotal && 933 mode1->vscan == mode2->vscan; 934 } 935 936 static bool drm_mode_match_clock(const struct drm_display_mode *mode1, 937 const struct drm_display_mode *mode2) 938 { 939 /* 940 * do clock check convert to PICOS 941 * so fb modes get matched the same 942 */ 943 if (mode1->clock && mode2->clock) 944 return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock); 945 else 946 return mode1->clock == mode2->clock; 947 } 948 949 static bool drm_mode_match_flags(const struct drm_display_mode *mode1, 950 const struct drm_display_mode *mode2) 951 { 952 return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 953 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK); 954 } 955 956 static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1, 957 const struct drm_display_mode *mode2) 958 { 959 return (mode1->flags & DRM_MODE_FLAG_3D_MASK) == 960 (mode2->flags & DRM_MODE_FLAG_3D_MASK); 961 } 962 963 static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1, 964 const struct drm_display_mode *mode2) 965 { 966 return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio; 967 } 968 969 /** 970 * drm_mode_match - test modes for (partial) equality 971 * @mode1: first mode 972 * @mode2: second mode 973 * @match_flags: which parts need to match (DRM_MODE_MATCH_*) 974 * 975 * Check to see if @mode1 and @mode2 are equivalent. 976 * 977 * Returns: 978 * True if the modes are (partially) equal, false otherwise. 979 */ 980 bool drm_mode_match(const struct drm_display_mode *mode1, 981 const struct drm_display_mode *mode2, 982 unsigned int match_flags) 983 { 984 if (!mode1 && !mode2) 985 return true; 986 987 if (!mode1 || !mode2) 988 return false; 989 990 if (match_flags & DRM_MODE_MATCH_TIMINGS && 991 !drm_mode_match_timings(mode1, mode2)) 992 return false; 993 994 if (match_flags & DRM_MODE_MATCH_CLOCK && 995 !drm_mode_match_clock(mode1, mode2)) 996 return false; 997 998 if (match_flags & DRM_MODE_MATCH_FLAGS && 999 !drm_mode_match_flags(mode1, mode2)) 1000 return false; 1001 1002 if (match_flags & DRM_MODE_MATCH_3D_FLAGS && 1003 !drm_mode_match_3d_flags(mode1, mode2)) 1004 return false; 1005 1006 if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO && 1007 !drm_mode_match_aspect_ratio(mode1, mode2)) 1008 return false; 1009 1010 return true; 1011 } 1012 EXPORT_SYMBOL(drm_mode_match); 1013 1014 /** 1015 * drm_mode_equal - test modes for equality 1016 * @mode1: first mode 1017 * @mode2: second mode 1018 * 1019 * Check to see if @mode1 and @mode2 are equivalent. 1020 * 1021 * Returns: 1022 * True if the modes are equal, false otherwise. 1023 */ 1024 bool drm_mode_equal(const struct drm_display_mode *mode1, 1025 const struct drm_display_mode *mode2) 1026 { 1027 return drm_mode_match(mode1, mode2, 1028 DRM_MODE_MATCH_TIMINGS | 1029 DRM_MODE_MATCH_CLOCK | 1030 DRM_MODE_MATCH_FLAGS | 1031 DRM_MODE_MATCH_3D_FLAGS| 1032 DRM_MODE_MATCH_ASPECT_RATIO); 1033 } 1034 EXPORT_SYMBOL(drm_mode_equal); 1035 1036 /** 1037 * drm_mode_equal_no_clocks - test modes for equality 1038 * @mode1: first mode 1039 * @mode2: second mode 1040 * 1041 * Check to see if @mode1 and @mode2 are equivalent, but 1042 * don't check the pixel clocks. 1043 * 1044 * Returns: 1045 * True if the modes are equal, false otherwise. 1046 */ 1047 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, 1048 const struct drm_display_mode *mode2) 1049 { 1050 return drm_mode_match(mode1, mode2, 1051 DRM_MODE_MATCH_TIMINGS | 1052 DRM_MODE_MATCH_FLAGS | 1053 DRM_MODE_MATCH_3D_FLAGS); 1054 } 1055 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 1056 1057 /** 1058 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 1059 * @mode1: first mode 1060 * @mode2: second mode 1061 * 1062 * Check to see if @mode1 and @mode2 are equivalent, but 1063 * don't check the pixel clocks nor the stereo layout. 1064 * 1065 * Returns: 1066 * True if the modes are equal, false otherwise. 1067 */ 1068 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 1069 const struct drm_display_mode *mode2) 1070 { 1071 return drm_mode_match(mode1, mode2, 1072 DRM_MODE_MATCH_TIMINGS | 1073 DRM_MODE_MATCH_FLAGS); 1074 } 1075 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1076 1077 static enum drm_mode_status 1078 drm_mode_validate_basic(const struct drm_display_mode *mode) 1079 { 1080 if (mode->type & ~DRM_MODE_TYPE_ALL) 1081 return MODE_BAD; 1082 1083 if (mode->flags & ~DRM_MODE_FLAG_ALL) 1084 return MODE_BAD; 1085 1086 if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1087 return MODE_BAD; 1088 1089 if (mode->clock == 0) 1090 return MODE_CLOCK_LOW; 1091 1092 if (mode->hdisplay == 0 || 1093 mode->hsync_start < mode->hdisplay || 1094 mode->hsync_end < mode->hsync_start || 1095 mode->htotal < mode->hsync_end) 1096 return MODE_H_ILLEGAL; 1097 1098 if (mode->vdisplay == 0 || 1099 mode->vsync_start < mode->vdisplay || 1100 mode->vsync_end < mode->vsync_start || 1101 mode->vtotal < mode->vsync_end) 1102 return MODE_V_ILLEGAL; 1103 1104 return MODE_OK; 1105 } 1106 1107 /** 1108 * drm_mode_validate_driver - make sure the mode is somewhat sane 1109 * @dev: drm device 1110 * @mode: mode to check 1111 * 1112 * First do basic validation on the mode, and then allow the driver 1113 * to check for device/driver specific limitations via the optional 1114 * &drm_mode_config_helper_funcs.mode_valid hook. 1115 * 1116 * Returns: 1117 * The mode status 1118 */ 1119 enum drm_mode_status 1120 drm_mode_validate_driver(struct drm_device *dev, 1121 const struct drm_display_mode *mode) 1122 { 1123 enum drm_mode_status status; 1124 1125 status = drm_mode_validate_basic(mode); 1126 if (status != MODE_OK) 1127 return status; 1128 1129 if (dev->mode_config.funcs->mode_valid) 1130 return dev->mode_config.funcs->mode_valid(dev, mode); 1131 else 1132 return MODE_OK; 1133 } 1134 EXPORT_SYMBOL(drm_mode_validate_driver); 1135 1136 /** 1137 * drm_mode_validate_size - make sure modes adhere to size constraints 1138 * @mode: mode to check 1139 * @maxX: maximum width 1140 * @maxY: maximum height 1141 * 1142 * This function is a helper which can be used to validate modes against size 1143 * limitations of the DRM device/connector. If a mode is too big its status 1144 * member is updated with the appropriate validation failure code. The list 1145 * itself is not changed. 1146 * 1147 * Returns: 1148 * The mode status 1149 */ 1150 enum drm_mode_status 1151 drm_mode_validate_size(const struct drm_display_mode *mode, 1152 int maxX, int maxY) 1153 { 1154 if (maxX > 0 && mode->hdisplay > maxX) 1155 return MODE_VIRTUAL_X; 1156 1157 if (maxY > 0 && mode->vdisplay > maxY) 1158 return MODE_VIRTUAL_Y; 1159 1160 return MODE_OK; 1161 } 1162 EXPORT_SYMBOL(drm_mode_validate_size); 1163 1164 /** 1165 * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed 1166 * @mode: mode to check 1167 * @connector: drm connector under action 1168 * 1169 * This function is a helper which can be used to filter out any YCBCR420 1170 * only mode, when the source doesn't support it. 1171 * 1172 * Returns: 1173 * The mode status 1174 */ 1175 enum drm_mode_status 1176 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode, 1177 struct drm_connector *connector) 1178 { 1179 u8 vic = drm_match_cea_mode(mode); 1180 enum drm_mode_status status = MODE_OK; 1181 struct drm_hdmi_info *hdmi = &connector->display_info.hdmi; 1182 1183 if (test_bit(vic, hdmi->y420_vdb_modes)) { 1184 if (!connector->ycbcr_420_allowed) 1185 status = MODE_NO_420; 1186 } 1187 1188 return status; 1189 } 1190 EXPORT_SYMBOL(drm_mode_validate_ycbcr420); 1191 1192 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1193 1194 static const char * const drm_mode_status_names[] = { 1195 MODE_STATUS(OK), 1196 MODE_STATUS(HSYNC), 1197 MODE_STATUS(VSYNC), 1198 MODE_STATUS(H_ILLEGAL), 1199 MODE_STATUS(V_ILLEGAL), 1200 MODE_STATUS(BAD_WIDTH), 1201 MODE_STATUS(NOMODE), 1202 MODE_STATUS(NO_INTERLACE), 1203 MODE_STATUS(NO_DBLESCAN), 1204 MODE_STATUS(NO_VSCAN), 1205 MODE_STATUS(MEM), 1206 MODE_STATUS(VIRTUAL_X), 1207 MODE_STATUS(VIRTUAL_Y), 1208 MODE_STATUS(MEM_VIRT), 1209 MODE_STATUS(NOCLOCK), 1210 MODE_STATUS(CLOCK_HIGH), 1211 MODE_STATUS(CLOCK_LOW), 1212 MODE_STATUS(CLOCK_RANGE), 1213 MODE_STATUS(BAD_HVALUE), 1214 MODE_STATUS(BAD_VVALUE), 1215 MODE_STATUS(BAD_VSCAN), 1216 MODE_STATUS(HSYNC_NARROW), 1217 MODE_STATUS(HSYNC_WIDE), 1218 MODE_STATUS(HBLANK_NARROW), 1219 MODE_STATUS(HBLANK_WIDE), 1220 MODE_STATUS(VSYNC_NARROW), 1221 MODE_STATUS(VSYNC_WIDE), 1222 MODE_STATUS(VBLANK_NARROW), 1223 MODE_STATUS(VBLANK_WIDE), 1224 MODE_STATUS(PANEL), 1225 MODE_STATUS(INTERLACE_WIDTH), 1226 MODE_STATUS(ONE_WIDTH), 1227 MODE_STATUS(ONE_HEIGHT), 1228 MODE_STATUS(ONE_SIZE), 1229 MODE_STATUS(NO_REDUCED), 1230 MODE_STATUS(NO_STEREO), 1231 MODE_STATUS(NO_420), 1232 MODE_STATUS(STALE), 1233 MODE_STATUS(BAD), 1234 MODE_STATUS(ERROR), 1235 }; 1236 1237 #undef MODE_STATUS 1238 1239 const char *drm_get_mode_status_name(enum drm_mode_status status) 1240 { 1241 int index = status + 3; 1242 1243 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1244 return ""; 1245 1246 return drm_mode_status_names[index]; 1247 } 1248 1249 /** 1250 * drm_mode_prune_invalid - remove invalid modes from mode list 1251 * @dev: DRM device 1252 * @mode_list: list of modes to check 1253 * @verbose: be verbose about it 1254 * 1255 * This helper function can be used to prune a display mode list after 1256 * validation has been completed. All modes whose status is not MODE_OK will be 1257 * removed from the list, and if @verbose the status code and mode name is also 1258 * printed to dmesg. 1259 */ 1260 void drm_mode_prune_invalid(struct drm_device *dev, 1261 struct list_head *mode_list, bool verbose) 1262 { 1263 struct drm_display_mode *mode, *t; 1264 1265 list_for_each_entry_safe(mode, t, mode_list, head) { 1266 if (mode->status != MODE_OK) { 1267 list_del(&mode->head); 1268 if (verbose) { 1269 drm_mode_debug_printmodeline(mode); 1270 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1271 mode->name, 1272 drm_get_mode_status_name(mode->status)); 1273 } 1274 drm_mode_destroy(dev, mode); 1275 } 1276 } 1277 } 1278 EXPORT_SYMBOL(drm_mode_prune_invalid); 1279 1280 /** 1281 * drm_mode_compare - compare modes for favorability 1282 * @priv: unused 1283 * @lh_a: list_head for first mode 1284 * @lh_b: list_head for second mode 1285 * 1286 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1287 * which is better. 1288 * 1289 * Returns: 1290 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1291 * positive if @lh_b is better than @lh_a. 1292 */ 1293 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) 1294 { 1295 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1296 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1297 int diff; 1298 1299 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1300 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1301 if (diff) 1302 return diff; 1303 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1304 if (diff) 1305 return diff; 1306 1307 diff = drm_mode_vrefresh(b) - drm_mode_vrefresh(a); 1308 if (diff) 1309 return diff; 1310 1311 diff = b->clock - a->clock; 1312 return diff; 1313 } 1314 1315 /** 1316 * drm_mode_sort - sort mode list 1317 * @mode_list: list of drm_display_mode structures to sort 1318 * 1319 * Sort @mode_list by favorability, moving good modes to the head of the list. 1320 */ 1321 void drm_mode_sort(struct list_head *mode_list) 1322 { 1323 list_sort(NULL, mode_list, drm_mode_compare); 1324 } 1325 EXPORT_SYMBOL(drm_mode_sort); 1326 1327 /** 1328 * drm_connector_list_update - update the mode list for the connector 1329 * @connector: the connector to update 1330 * 1331 * This moves the modes from the @connector probed_modes list 1332 * to the actual mode list. It compares the probed mode against the current 1333 * list and only adds different/new modes. 1334 * 1335 * This is just a helper functions doesn't validate any modes itself and also 1336 * doesn't prune any invalid modes. Callers need to do that themselves. 1337 */ 1338 void drm_connector_list_update(struct drm_connector *connector) 1339 { 1340 struct drm_display_mode *pmode, *pt; 1341 1342 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1343 1344 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1345 struct drm_display_mode *mode; 1346 bool found_it = false; 1347 1348 /* go through current modes checking for the new probed mode */ 1349 list_for_each_entry(mode, &connector->modes, head) { 1350 if (!drm_mode_equal(pmode, mode)) 1351 continue; 1352 1353 found_it = true; 1354 1355 /* 1356 * If the old matching mode is stale (ie. left over 1357 * from a previous probe) just replace it outright. 1358 * Otherwise just merge the type bits between all 1359 * equal probed modes. 1360 * 1361 * If two probed modes are considered equal, pick the 1362 * actual timings from the one that's marked as 1363 * preferred (in case the match isn't 100%). If 1364 * multiple or zero preferred modes are present, favor 1365 * the mode added to the probed_modes list first. 1366 */ 1367 if (mode->status == MODE_STALE) { 1368 drm_mode_copy(mode, pmode); 1369 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1370 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1371 pmode->type |= mode->type; 1372 drm_mode_copy(mode, pmode); 1373 } else { 1374 mode->type |= pmode->type; 1375 } 1376 1377 list_del(&pmode->head); 1378 drm_mode_destroy(connector->dev, pmode); 1379 break; 1380 } 1381 1382 if (!found_it) { 1383 list_move_tail(&pmode->head, &connector->modes); 1384 } 1385 } 1386 } 1387 EXPORT_SYMBOL(drm_connector_list_update); 1388 1389 static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, 1390 struct drm_cmdline_mode *mode) 1391 { 1392 unsigned int bpp; 1393 1394 if (str[0] != '-') 1395 return -EINVAL; 1396 1397 str++; 1398 bpp = simple_strtol(str, end_ptr, 10); 1399 if (*end_ptr == str) 1400 return -EINVAL; 1401 1402 mode->bpp = bpp; 1403 mode->bpp_specified = true; 1404 1405 return 0; 1406 } 1407 1408 static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, 1409 struct drm_cmdline_mode *mode) 1410 { 1411 unsigned int refresh; 1412 1413 if (str[0] != '@') 1414 return -EINVAL; 1415 1416 str++; 1417 refresh = simple_strtol(str, end_ptr, 10); 1418 if (*end_ptr == str) 1419 return -EINVAL; 1420 1421 mode->refresh = refresh; 1422 mode->refresh_specified = true; 1423 1424 return 0; 1425 } 1426 1427 static int drm_mode_parse_cmdline_extra(const char *str, int length, 1428 bool freestanding, 1429 const struct drm_connector *connector, 1430 struct drm_cmdline_mode *mode) 1431 { 1432 int i; 1433 1434 for (i = 0; i < length; i++) { 1435 switch (str[i]) { 1436 case 'i': 1437 if (freestanding) 1438 return -EINVAL; 1439 1440 mode->interlace = true; 1441 break; 1442 case 'm': 1443 if (freestanding) 1444 return -EINVAL; 1445 1446 mode->margins = true; 1447 break; 1448 case 'D': 1449 if (mode->force != DRM_FORCE_UNSPECIFIED) 1450 return -EINVAL; 1451 1452 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1453 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1454 mode->force = DRM_FORCE_ON; 1455 else 1456 mode->force = DRM_FORCE_ON_DIGITAL; 1457 break; 1458 case 'd': 1459 if (mode->force != DRM_FORCE_UNSPECIFIED) 1460 return -EINVAL; 1461 1462 mode->force = DRM_FORCE_OFF; 1463 break; 1464 case 'e': 1465 if (mode->force != DRM_FORCE_UNSPECIFIED) 1466 return -EINVAL; 1467 1468 mode->force = DRM_FORCE_ON; 1469 break; 1470 default: 1471 return -EINVAL; 1472 } 1473 } 1474 1475 return 0; 1476 } 1477 1478 static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, 1479 bool extras, 1480 const struct drm_connector *connector, 1481 struct drm_cmdline_mode *mode) 1482 { 1483 const char *str_start = str; 1484 bool rb = false, cvt = false; 1485 int xres = 0, yres = 0; 1486 int remaining, i; 1487 char *end_ptr; 1488 1489 xres = simple_strtol(str, &end_ptr, 10); 1490 if (end_ptr == str) 1491 return -EINVAL; 1492 1493 if (end_ptr[0] != 'x') 1494 return -EINVAL; 1495 end_ptr++; 1496 1497 str = end_ptr; 1498 yres = simple_strtol(str, &end_ptr, 10); 1499 if (end_ptr == str) 1500 return -EINVAL; 1501 1502 remaining = length - (end_ptr - str_start); 1503 if (remaining < 0) 1504 return -EINVAL; 1505 1506 for (i = 0; i < remaining; i++) { 1507 switch (end_ptr[i]) { 1508 case 'M': 1509 cvt = true; 1510 break; 1511 case 'R': 1512 rb = true; 1513 break; 1514 default: 1515 /* 1516 * Try to pass that to our extras parsing 1517 * function to handle the case where the 1518 * extras are directly after the resolution 1519 */ 1520 if (extras) { 1521 int ret = drm_mode_parse_cmdline_extra(end_ptr + i, 1522 1, 1523 false, 1524 connector, 1525 mode); 1526 if (ret) 1527 return ret; 1528 } else { 1529 return -EINVAL; 1530 } 1531 } 1532 } 1533 1534 mode->xres = xres; 1535 mode->yres = yres; 1536 mode->cvt = cvt; 1537 mode->rb = rb; 1538 1539 return 0; 1540 } 1541 1542 static int drm_mode_parse_cmdline_int(const char *delim, unsigned int *int_ret) 1543 { 1544 const char *value; 1545 char *endp; 1546 1547 /* 1548 * delim must point to the '=', otherwise it is a syntax error and 1549 * if delim points to the terminating zero, then delim + 1 wil point 1550 * past the end of the string. 1551 */ 1552 if (*delim != '=') 1553 return -EINVAL; 1554 1555 value = delim + 1; 1556 *int_ret = simple_strtol(value, &endp, 10); 1557 1558 /* Make sure we have parsed something */ 1559 if (endp == value) 1560 return -EINVAL; 1561 1562 return 0; 1563 } 1564 1565 static int drm_mode_parse_panel_orientation(const char *delim, 1566 struct drm_cmdline_mode *mode) 1567 { 1568 const char *value; 1569 1570 if (*delim != '=') 1571 return -EINVAL; 1572 1573 value = delim + 1; 1574 delim = strchr(value, ','); 1575 if (!delim) 1576 delim = value + strlen(value); 1577 1578 if (!strncmp(value, "normal", delim - value)) 1579 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL; 1580 else if (!strncmp(value, "upside_down", delim - value)) 1581 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP; 1582 else if (!strncmp(value, "left_side_up", delim - value)) 1583 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP; 1584 else if (!strncmp(value, "right_side_up", delim - value)) 1585 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP; 1586 else 1587 return -EINVAL; 1588 1589 return 0; 1590 } 1591 1592 static int drm_mode_parse_cmdline_options(const char *str, 1593 bool freestanding, 1594 const struct drm_connector *connector, 1595 struct drm_cmdline_mode *mode) 1596 { 1597 unsigned int deg, margin, rotation = 0; 1598 const char *delim, *option, *sep; 1599 1600 option = str; 1601 do { 1602 delim = strchr(option, '='); 1603 if (!delim) { 1604 delim = strchr(option, ','); 1605 1606 if (!delim) 1607 delim = option + strlen(option); 1608 } 1609 1610 if (!strncmp(option, "rotate", delim - option)) { 1611 if (drm_mode_parse_cmdline_int(delim, °)) 1612 return -EINVAL; 1613 1614 switch (deg) { 1615 case 0: 1616 rotation |= DRM_MODE_ROTATE_0; 1617 break; 1618 1619 case 90: 1620 rotation |= DRM_MODE_ROTATE_90; 1621 break; 1622 1623 case 180: 1624 rotation |= DRM_MODE_ROTATE_180; 1625 break; 1626 1627 case 270: 1628 rotation |= DRM_MODE_ROTATE_270; 1629 break; 1630 1631 default: 1632 return -EINVAL; 1633 } 1634 } else if (!strncmp(option, "reflect_x", delim - option)) { 1635 rotation |= DRM_MODE_REFLECT_X; 1636 } else if (!strncmp(option, "reflect_y", delim - option)) { 1637 rotation |= DRM_MODE_REFLECT_Y; 1638 } else if (!strncmp(option, "margin_right", delim - option)) { 1639 if (drm_mode_parse_cmdline_int(delim, &margin)) 1640 return -EINVAL; 1641 1642 mode->tv_margins.right = margin; 1643 } else if (!strncmp(option, "margin_left", delim - option)) { 1644 if (drm_mode_parse_cmdline_int(delim, &margin)) 1645 return -EINVAL; 1646 1647 mode->tv_margins.left = margin; 1648 } else if (!strncmp(option, "margin_top", delim - option)) { 1649 if (drm_mode_parse_cmdline_int(delim, &margin)) 1650 return -EINVAL; 1651 1652 mode->tv_margins.top = margin; 1653 } else if (!strncmp(option, "margin_bottom", delim - option)) { 1654 if (drm_mode_parse_cmdline_int(delim, &margin)) 1655 return -EINVAL; 1656 1657 mode->tv_margins.bottom = margin; 1658 } else if (!strncmp(option, "panel_orientation", delim - option)) { 1659 if (drm_mode_parse_panel_orientation(delim, mode)) 1660 return -EINVAL; 1661 } else { 1662 return -EINVAL; 1663 } 1664 sep = strchr(delim, ','); 1665 option = sep + 1; 1666 } while (sep); 1667 1668 if (rotation && freestanding) 1669 return -EINVAL; 1670 1671 if (!(rotation & DRM_MODE_ROTATE_MASK)) 1672 rotation |= DRM_MODE_ROTATE_0; 1673 1674 /* Make sure there is exactly one rotation defined */ 1675 if (!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK)) 1676 return -EINVAL; 1677 1678 mode->rotation_reflection = rotation; 1679 1680 return 0; 1681 } 1682 1683 static const char * const drm_named_modes_whitelist[] = { 1684 "NTSC", 1685 "PAL", 1686 }; 1687 1688 /** 1689 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1690 * @mode_option: optional per connector mode option 1691 * @connector: connector to parse modeline for 1692 * @mode: preallocated drm_cmdline_mode structure to fill out 1693 * 1694 * This parses @mode_option command line modeline for modes and options to 1695 * configure the connector. If @mode_option is NULL the default command line 1696 * modeline in fb_mode_option will be parsed instead. 1697 * 1698 * This uses the same parameters as the fb modedb.c, except for an extra 1699 * force-enable, force-enable-digital and force-disable bit at the end:: 1700 * 1701 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1702 * 1703 * Additionals options can be provided following the mode, using a comma to 1704 * separate each option. Valid options can be found in 1705 * Documentation/fb/modedb.rst. 1706 * 1707 * The intermediate drm_cmdline_mode structure is required to store additional 1708 * options from the command line modline like the force-enable/disable flag. 1709 * 1710 * Returns: 1711 * True if a valid modeline has been parsed, false otherwise. 1712 */ 1713 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1714 const struct drm_connector *connector, 1715 struct drm_cmdline_mode *mode) 1716 { 1717 const char *name; 1718 bool freestanding = false, parse_extras = false; 1719 unsigned int bpp_off = 0, refresh_off = 0, options_off = 0; 1720 unsigned int mode_end = 0; 1721 const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; 1722 const char *options_ptr = NULL; 1723 char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; 1724 int i, len, ret; 1725 1726 memset(mode, 0, sizeof(*mode)); 1727 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 1728 1729 if (!mode_option) 1730 return false; 1731 1732 name = mode_option; 1733 1734 /* Try to locate the bpp and refresh specifiers, if any */ 1735 bpp_ptr = strchr(name, '-'); 1736 if (bpp_ptr) 1737 bpp_off = bpp_ptr - name; 1738 1739 refresh_ptr = strchr(name, '@'); 1740 if (refresh_ptr) 1741 refresh_off = refresh_ptr - name; 1742 1743 /* Locate the start of named options */ 1744 options_ptr = strchr(name, ','); 1745 if (options_ptr) 1746 options_off = options_ptr - name; 1747 1748 /* Locate the end of the name / resolution, and parse it */ 1749 if (bpp_ptr) { 1750 mode_end = bpp_off; 1751 } else if (refresh_ptr) { 1752 mode_end = refresh_off; 1753 } else if (options_ptr) { 1754 mode_end = options_off; 1755 parse_extras = true; 1756 } else { 1757 mode_end = strlen(name); 1758 parse_extras = true; 1759 } 1760 1761 /* First check for a named mode */ 1762 for (i = 0; i < ARRAY_SIZE(drm_named_modes_whitelist); i++) { 1763 ret = str_has_prefix(name, drm_named_modes_whitelist[i]); 1764 if (ret == mode_end) { 1765 if (refresh_ptr) 1766 return false; /* named + refresh is invalid */ 1767 1768 strcpy(mode->name, drm_named_modes_whitelist[i]); 1769 mode->specified = true; 1770 break; 1771 } 1772 } 1773 1774 /* No named mode? Check for a normal mode argument, e.g. 1024x768 */ 1775 if (!mode->specified && isdigit(name[0])) { 1776 ret = drm_mode_parse_cmdline_res_mode(name, mode_end, 1777 parse_extras, 1778 connector, 1779 mode); 1780 if (ret) 1781 return false; 1782 1783 mode->specified = true; 1784 } 1785 1786 /* No mode? Check for freestanding extras and/or options */ 1787 if (!mode->specified) { 1788 unsigned int len = strlen(mode_option); 1789 1790 if (bpp_ptr || refresh_ptr) 1791 return false; /* syntax error */ 1792 1793 if (len == 1 || (len >= 2 && mode_option[1] == ',')) 1794 extra_ptr = mode_option; 1795 else 1796 options_ptr = mode_option - 1; 1797 1798 freestanding = true; 1799 } 1800 1801 if (bpp_ptr) { 1802 ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); 1803 if (ret) 1804 return false; 1805 1806 mode->bpp_specified = true; 1807 } 1808 1809 if (refresh_ptr) { 1810 ret = drm_mode_parse_cmdline_refresh(refresh_ptr, 1811 &refresh_end_ptr, mode); 1812 if (ret) 1813 return false; 1814 1815 mode->refresh_specified = true; 1816 } 1817 1818 /* 1819 * Locate the end of the bpp / refresh, and parse the extras 1820 * if relevant 1821 */ 1822 if (bpp_ptr && refresh_ptr) 1823 extra_ptr = max(bpp_end_ptr, refresh_end_ptr); 1824 else if (bpp_ptr) 1825 extra_ptr = bpp_end_ptr; 1826 else if (refresh_ptr) 1827 extra_ptr = refresh_end_ptr; 1828 1829 if (extra_ptr) { 1830 if (options_ptr) 1831 len = options_ptr - extra_ptr; 1832 else 1833 len = strlen(extra_ptr); 1834 1835 ret = drm_mode_parse_cmdline_extra(extra_ptr, len, freestanding, 1836 connector, mode); 1837 if (ret) 1838 return false; 1839 } 1840 1841 if (options_ptr) { 1842 ret = drm_mode_parse_cmdline_options(options_ptr + 1, 1843 freestanding, 1844 connector, mode); 1845 if (ret) 1846 return false; 1847 } 1848 1849 return true; 1850 } 1851 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1852 1853 /** 1854 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1855 * @dev: DRM device to create the new mode for 1856 * @cmd: input command line modeline 1857 * 1858 * Returns: 1859 * Pointer to converted mode on success, NULL on error. 1860 */ 1861 struct drm_display_mode * 1862 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1863 struct drm_cmdline_mode *cmd) 1864 { 1865 struct drm_display_mode *mode; 1866 1867 if (cmd->cvt) 1868 mode = drm_cvt_mode(dev, 1869 cmd->xres, cmd->yres, 1870 cmd->refresh_specified ? cmd->refresh : 60, 1871 cmd->rb, cmd->interlace, 1872 cmd->margins); 1873 else 1874 mode = drm_gtf_mode(dev, 1875 cmd->xres, cmd->yres, 1876 cmd->refresh_specified ? cmd->refresh : 60, 1877 cmd->interlace, 1878 cmd->margins); 1879 if (!mode) 1880 return NULL; 1881 1882 mode->type |= DRM_MODE_TYPE_USERDEF; 1883 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ 1884 if (cmd->xres == 1366) 1885 drm_mode_fixup_1366x768(mode); 1886 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1887 return mode; 1888 } 1889 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1890 1891 /** 1892 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1893 * @out: drm_mode_modeinfo struct to return to the user 1894 * @in: drm_display_mode to use 1895 * 1896 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1897 * the user. 1898 */ 1899 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1900 const struct drm_display_mode *in) 1901 { 1902 out->clock = in->clock; 1903 out->hdisplay = in->hdisplay; 1904 out->hsync_start = in->hsync_start; 1905 out->hsync_end = in->hsync_end; 1906 out->htotal = in->htotal; 1907 out->hskew = in->hskew; 1908 out->vdisplay = in->vdisplay; 1909 out->vsync_start = in->vsync_start; 1910 out->vsync_end = in->vsync_end; 1911 out->vtotal = in->vtotal; 1912 out->vscan = in->vscan; 1913 out->vrefresh = drm_mode_vrefresh(in); 1914 out->flags = in->flags; 1915 out->type = in->type; 1916 1917 switch (in->picture_aspect_ratio) { 1918 case HDMI_PICTURE_ASPECT_4_3: 1919 out->flags |= DRM_MODE_FLAG_PIC_AR_4_3; 1920 break; 1921 case HDMI_PICTURE_ASPECT_16_9: 1922 out->flags |= DRM_MODE_FLAG_PIC_AR_16_9; 1923 break; 1924 case HDMI_PICTURE_ASPECT_64_27: 1925 out->flags |= DRM_MODE_FLAG_PIC_AR_64_27; 1926 break; 1927 case HDMI_PICTURE_ASPECT_256_135: 1928 out->flags |= DRM_MODE_FLAG_PIC_AR_256_135; 1929 break; 1930 default: 1931 WARN(1, "Invalid aspect ratio (0%x) on mode\n", 1932 in->picture_aspect_ratio); 1933 /* fall through */ 1934 case HDMI_PICTURE_ASPECT_NONE: 1935 out->flags |= DRM_MODE_FLAG_PIC_AR_NONE; 1936 break; 1937 } 1938 1939 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1940 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1941 } 1942 1943 /** 1944 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1945 * @dev: drm device 1946 * @out: drm_display_mode to return to the user 1947 * @in: drm_mode_modeinfo to use 1948 * 1949 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1950 * the caller. 1951 * 1952 * Returns: 1953 * Zero on success, negative errno on failure. 1954 */ 1955 int drm_mode_convert_umode(struct drm_device *dev, 1956 struct drm_display_mode *out, 1957 const struct drm_mode_modeinfo *in) 1958 { 1959 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 1960 return -ERANGE; 1961 1962 out->clock = in->clock; 1963 out->hdisplay = in->hdisplay; 1964 out->hsync_start = in->hsync_start; 1965 out->hsync_end = in->hsync_end; 1966 out->htotal = in->htotal; 1967 out->hskew = in->hskew; 1968 out->vdisplay = in->vdisplay; 1969 out->vsync_start = in->vsync_start; 1970 out->vsync_end = in->vsync_end; 1971 out->vtotal = in->vtotal; 1972 out->vscan = in->vscan; 1973 out->flags = in->flags; 1974 /* 1975 * Old xf86-video-vmware (possibly others too) used to 1976 * leave 'type' unititialized. Just ignore any bits we 1977 * don't like. It's a just hint after all, and more 1978 * useful for the kernel->userspace direction anyway. 1979 */ 1980 out->type = in->type & DRM_MODE_TYPE_ALL; 1981 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1982 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1983 1984 /* Clearing picture aspect ratio bits from out flags, 1985 * as the aspect-ratio information is not stored in 1986 * flags for kernel-mode, but in picture_aspect_ratio. 1987 */ 1988 out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 1989 1990 switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) { 1991 case DRM_MODE_FLAG_PIC_AR_4_3: 1992 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3; 1993 break; 1994 case DRM_MODE_FLAG_PIC_AR_16_9: 1995 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9; 1996 break; 1997 case DRM_MODE_FLAG_PIC_AR_64_27: 1998 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27; 1999 break; 2000 case DRM_MODE_FLAG_PIC_AR_256_135: 2001 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135; 2002 break; 2003 case DRM_MODE_FLAG_PIC_AR_NONE: 2004 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE; 2005 break; 2006 default: 2007 return -EINVAL; 2008 } 2009 2010 out->status = drm_mode_validate_driver(dev, out); 2011 if (out->status != MODE_OK) 2012 return -EINVAL; 2013 2014 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 2015 2016 return 0; 2017 } 2018 2019 /** 2020 * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420 2021 * output format 2022 * 2023 * @display: display under action 2024 * @mode: video mode to be tested. 2025 * 2026 * Returns: 2027 * true if the mode can be supported in YCBCR420 format 2028 * false if not. 2029 */ 2030 bool drm_mode_is_420_only(const struct drm_display_info *display, 2031 const struct drm_display_mode *mode) 2032 { 2033 u8 vic = drm_match_cea_mode(mode); 2034 2035 return test_bit(vic, display->hdmi.y420_vdb_modes); 2036 } 2037 EXPORT_SYMBOL(drm_mode_is_420_only); 2038 2039 /** 2040 * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420 2041 * output format also (along with RGB/YCBCR444/422) 2042 * 2043 * @display: display under action. 2044 * @mode: video mode to be tested. 2045 * 2046 * Returns: 2047 * true if the mode can be support YCBCR420 format 2048 * false if not. 2049 */ 2050 bool drm_mode_is_420_also(const struct drm_display_info *display, 2051 const struct drm_display_mode *mode) 2052 { 2053 u8 vic = drm_match_cea_mode(mode); 2054 2055 return test_bit(vic, display->hdmi.y420_cmdb_modes); 2056 } 2057 EXPORT_SYMBOL(drm_mode_is_420_also); 2058 /** 2059 * drm_mode_is_420 - if a given videomode can be supported in YCBCR420 2060 * output format 2061 * 2062 * @display: display under action. 2063 * @mode: video mode to be tested. 2064 * 2065 * Returns: 2066 * true if the mode can be supported in YCBCR420 format 2067 * false if not. 2068 */ 2069 bool drm_mode_is_420(const struct drm_display_info *display, 2070 const struct drm_display_mode *mode) 2071 { 2072 return drm_mode_is_420_only(display, mode) || 2073 drm_mode_is_420_also(display, mode); 2074 } 2075 EXPORT_SYMBOL(drm_mode_is_420); 2076