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