1 /* $NetBSD: drm_modes.c,v 1.11 2021/12/19 01:13:59 riastradh Exp $ */ 2 3 /* 4 * Copyright © 1997-2003 by The XFree86 Project, Inc. 5 * Copyright © 2007 Dave Airlie 6 * Copyright © 2007-2008 Intel Corporation 7 * Jesse Barnes <jesse.barnes@intel.com> 8 * Copyright 2005-2006 Luc Verhaegen 9 * Copyright (c) 2001, Andy Ritger aritger@nvidia.com 10 * 11 * Permission is hereby granted, free of charge, to any person obtaining a 12 * copy of this software and associated documentation files (the "Software"), 13 * to deal in the Software without restriction, including without limitation 14 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 15 * and/or sell copies of the Software, and to permit persons to whom the 16 * Software is furnished to do so, subject to the following conditions: 17 * 18 * The above copyright notice and this permission notice shall be included in 19 * all copies or substantial portions of the Software. 20 * 21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 24 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 25 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 26 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 27 * OTHER DEALINGS IN THE SOFTWARE. 28 * 29 * Except as contained in this notice, the name of the copyright holder(s) 30 * and author(s) shall not be used in advertising or otherwise to promote 31 * the sale, use or other dealings in this Software without prior written 32 * authorization from the copyright holder(s) and author(s). 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: drm_modes.c,v 1.11 2021/12/19 01:13:59 riastradh Exp $"); 37 38 #include <linux/ctype.h> 39 #include <linux/list.h> 40 #include <linux/list_sort.h> 41 #include <linux/export.h> 42 #include <asm/div64.h> 43 44 #ifdef CONFIG_VIDEOMODE_HELPERS 45 #ifdef CONFIG_OF 46 #include <video/of_videomode.h> 47 #endif 48 #include <video/videomode.h> 49 #endif 50 51 #include <drm/drm_crtc.h> 52 #include <drm/drm_device.h> 53 #include <drm/drm_modes.h> 54 #include <drm/drm_print.h> 55 56 #include "drm_crtc_internal.h" 57 58 /** 59 * drm_mode_debug_printmodeline - print a mode to dmesg 60 * @mode: mode to print 61 * 62 * Describe @mode using DRM_DEBUG. 63 */ 64 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) 65 { 66 DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 67 } 68 EXPORT_SYMBOL(drm_mode_debug_printmodeline); 69 70 /** 71 * drm_mode_create - create a new display mode 72 * @dev: DRM device 73 * 74 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it 75 * and return it. 76 * 77 * Returns: 78 * Pointer to new mode on success, NULL on error. 79 */ 80 struct drm_display_mode *drm_mode_create(struct drm_device *dev) 81 { 82 struct drm_display_mode *nmode; 83 84 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); 85 if (!nmode) 86 return NULL; 87 88 return nmode; 89 } 90 EXPORT_SYMBOL(drm_mode_create); 91 92 /** 93 * drm_mode_destroy - remove a mode 94 * @dev: DRM device 95 * @mode: mode to remove 96 * 97 * Release @mode's unique ID, then free it @mode structure itself using kfree. 98 */ 99 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) 100 { 101 if (!mode) 102 return; 103 104 kfree(mode); 105 } 106 EXPORT_SYMBOL(drm_mode_destroy); 107 108 /** 109 * drm_mode_probed_add - add a mode to a connector's probed_mode list 110 * @connector: connector the new mode 111 * @mode: mode data 112 * 113 * Add @mode to @connector's probed_mode list for later use. This list should 114 * then in a second step get filtered and all the modes actually supported by 115 * the hardware moved to the @connector's modes list. 116 */ 117 void drm_mode_probed_add(struct drm_connector *connector, 118 struct drm_display_mode *mode) 119 { 120 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 121 122 list_add_tail(&mode->head, &connector->probed_modes); 123 } 124 EXPORT_SYMBOL(drm_mode_probed_add); 125 126 /** 127 * drm_cvt_mode -create a modeline based on the CVT algorithm 128 * @dev: drm device 129 * @hdisplay: hdisplay size 130 * @vdisplay: vdisplay size 131 * @vrefresh: vrefresh rate 132 * @reduced: whether to use reduced blanking 133 * @interlaced: whether to compute an interlaced mode 134 * @margins: whether to add margins (borders) 135 * 136 * This function is called to generate the modeline based on CVT algorithm 137 * according to the hdisplay, vdisplay, vrefresh. 138 * It is based from the VESA(TM) Coordinated Video Timing Generator by 139 * Graham Loveridge April 9, 2003 available at 140 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 141 * 142 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 143 * What I have done is to translate it by using integer calculation. 144 * 145 * Returns: 146 * The modeline based on the CVT algorithm stored in a drm_display_mode object. 147 * The display mode object is allocated with drm_mode_create(). Returns NULL 148 * when no mode could be allocated. 149 */ 150 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 151 int vdisplay, int vrefresh, 152 bool reduced, bool interlaced, bool margins) 153 { 154 #define HV_FACTOR 1000 155 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 156 #define CVT_MARGIN_PERCENTAGE 18 157 /* 2) character cell horizontal granularity (pixels) - default 8 */ 158 #define CVT_H_GRANULARITY 8 159 /* 3) Minimum vertical porch (lines) - default 3 */ 160 #define CVT_MIN_V_PORCH 3 161 /* 4) Minimum number of vertical back porch lines - default 6 */ 162 #define CVT_MIN_V_BPORCH 6 163 /* Pixel Clock step (kHz) */ 164 #define CVT_CLOCK_STEP 250 165 struct drm_display_mode *drm_mode; 166 unsigned int vfieldrate, hperiod; 167 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 168 int interlace; 169 u64 tmp; 170 171 if (!hdisplay || !vdisplay) 172 return NULL; 173 174 /* allocate the drm_display_mode structure. If failure, we will 175 * return directly 176 */ 177 drm_mode = drm_mode_create(dev); 178 if (!drm_mode) 179 return NULL; 180 181 /* the CVT default refresh rate is 60Hz */ 182 if (!vrefresh) 183 vrefresh = 60; 184 185 /* the required field fresh rate */ 186 if (interlaced) 187 vfieldrate = vrefresh * 2; 188 else 189 vfieldrate = vrefresh; 190 191 /* horizontal pixels */ 192 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 193 194 /* determine the left&right borders */ 195 hmargin = 0; 196 if (margins) { 197 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 198 hmargin -= hmargin % CVT_H_GRANULARITY; 199 } 200 /* find the total active pixels */ 201 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 202 203 /* find the number of lines per field */ 204 if (interlaced) 205 vdisplay_rnd = vdisplay / 2; 206 else 207 vdisplay_rnd = vdisplay; 208 209 /* find the top & bottom borders */ 210 vmargin = 0; 211 if (margins) 212 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 213 214 drm_mode->vdisplay = vdisplay + 2 * vmargin; 215 216 /* Interlaced */ 217 if (interlaced) 218 interlace = 1; 219 else 220 interlace = 0; 221 222 /* Determine VSync Width from aspect ratio */ 223 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 224 vsync = 4; 225 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 226 vsync = 5; 227 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 228 vsync = 6; 229 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 230 vsync = 7; 231 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 232 vsync = 7; 233 else /* custom */ 234 vsync = 10; 235 236 if (!reduced) { 237 /* simplify the GTF calculation */ 238 /* 4) Minimum time of vertical sync + back porch interval (µs) 239 * default 550.0 240 */ 241 int tmp1, tmp2; 242 #define CVT_MIN_VSYNC_BP 550 243 /* 3) Nominal HSync width (% of line period) - default 8 */ 244 #define CVT_HSYNC_PERCENTAGE 8 245 unsigned int hblank_percentage; 246 int vsyncandback_porch, __maybe_unused vback_porch, hblank; 247 248 /* estimated the horizontal period */ 249 tmp1 = HV_FACTOR * 1000000 - 250 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 251 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 252 interlace; 253 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 254 255 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 256 /* 9. Find number of lines in sync + backporch */ 257 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 258 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 259 else 260 vsyncandback_porch = tmp1; 261 /* 10. Find number of lines in back porch */ 262 vback_porch = vsyncandback_porch - vsync; 263 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 264 vsyncandback_porch + CVT_MIN_V_PORCH; 265 /* 5) Definition of Horizontal blanking time limitation */ 266 /* Gradient (%/kHz) - default 600 */ 267 #define CVT_M_FACTOR 600 268 /* Offset (%) - default 40 */ 269 #define CVT_C_FACTOR 40 270 /* Blanking time scaling factor - default 128 */ 271 #define CVT_K_FACTOR 128 272 /* Scaling factor weighting - default 20 */ 273 #define CVT_J_FACTOR 20 274 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 275 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 276 CVT_J_FACTOR) 277 /* 12. Find ideal blanking duty cycle from formula */ 278 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 279 hperiod / 1000; 280 /* 13. Blanking time */ 281 if (hblank_percentage < 20 * HV_FACTOR) 282 hblank_percentage = 20 * HV_FACTOR; 283 hblank = drm_mode->hdisplay * hblank_percentage / 284 (100 * HV_FACTOR - hblank_percentage); 285 hblank -= hblank % (2 * CVT_H_GRANULARITY); 286 /* 14. find the total pixels per line */ 287 drm_mode->htotal = drm_mode->hdisplay + hblank; 288 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 289 drm_mode->hsync_start = drm_mode->hsync_end - 290 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 291 drm_mode->hsync_start += CVT_H_GRANULARITY - 292 drm_mode->hsync_start % CVT_H_GRANULARITY; 293 /* fill the Vsync values */ 294 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 295 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 296 } else { 297 /* Reduced blanking */ 298 /* Minimum vertical blanking interval time (µs)- default 460 */ 299 #define CVT_RB_MIN_VBLANK 460 300 /* Fixed number of clocks for horizontal sync */ 301 #define CVT_RB_H_SYNC 32 302 /* Fixed number of clocks for horizontal blanking */ 303 #define CVT_RB_H_BLANK 160 304 /* Fixed number of lines for vertical front porch - default 3*/ 305 #define CVT_RB_VFPORCH 3 306 int vbilines; 307 int tmp1, tmp2; 308 /* 8. Estimate Horizontal period. */ 309 tmp1 = HV_FACTOR * 1000000 - 310 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 311 tmp2 = vdisplay_rnd + 2 * vmargin; 312 hperiod = tmp1 / (tmp2 * vfieldrate); 313 /* 9. Find number of lines in vertical blanking */ 314 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 315 /* 10. Check if vertical blanking is sufficient */ 316 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 317 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 318 /* 11. Find total number of lines in vertical field */ 319 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 320 /* 12. Find total number of pixels in a line */ 321 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 322 /* Fill in HSync values */ 323 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 324 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 325 /* Fill in VSync values */ 326 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 327 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 328 } 329 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 330 tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */ 331 tmp *= HV_FACTOR * 1000; 332 do_div(tmp, hperiod); 333 tmp -= drm_mode->clock % CVT_CLOCK_STEP; 334 drm_mode->clock = tmp; 335 /* 18/16. Find actual vertical frame frequency */ 336 /* ignore - just set the mode flag for interlaced */ 337 if (interlaced) { 338 drm_mode->vtotal *= 2; 339 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 340 } 341 /* Fill the mode line name */ 342 drm_mode_set_name(drm_mode); 343 if (reduced) 344 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 345 DRM_MODE_FLAG_NVSYNC); 346 else 347 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 348 DRM_MODE_FLAG_NHSYNC); 349 350 return drm_mode; 351 } 352 EXPORT_SYMBOL(drm_cvt_mode); 353 354 /** 355 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm 356 * @dev: drm device 357 * @hdisplay: hdisplay size 358 * @vdisplay: vdisplay size 359 * @vrefresh: vrefresh rate. 360 * @interlaced: whether to compute an interlaced mode 361 * @margins: desired margin (borders) size 362 * @GTF_M: extended GTF formula parameters 363 * @GTF_2C: extended GTF formula parameters 364 * @GTF_K: extended GTF formula parameters 365 * @GTF_2J: extended GTF formula parameters 366 * 367 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 368 * in here multiplied by two. For a C of 40, pass in 80. 369 * 370 * Returns: 371 * The modeline based on the full GTF algorithm stored in a drm_display_mode object. 372 * The display mode object is allocated with drm_mode_create(). Returns NULL 373 * when no mode could be allocated. 374 */ 375 struct drm_display_mode * 376 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 377 int vrefresh, bool interlaced, int margins, 378 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 379 { /* 1) top/bottom margin size (% of height) - default: 1.8, */ 380 #define GTF_MARGIN_PERCENTAGE 18 381 /* 2) character cell horizontal granularity (pixels) - default 8 */ 382 #define GTF_CELL_GRAN 8 383 /* 3) Minimum vertical porch (lines) - default 3 */ 384 #define GTF_MIN_V_PORCH 1 385 /* width of vsync in lines */ 386 #define V_SYNC_RQD 3 387 /* width of hsync as % of total line */ 388 #define H_SYNC_PERCENT 8 389 /* min time of vsync + back porch (microsec) */ 390 #define MIN_VSYNC_PLUS_BP 550 391 /* C' and M' are part of the Blanking Duty Cycle computation */ 392 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 393 #define GTF_M_PRIME (GTF_K * GTF_M / 256) 394 struct drm_display_mode *drm_mode; 395 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 396 int top_margin, bottom_margin; 397 int interlace; 398 unsigned int hfreq_est; 399 int vsync_plus_bp, __maybe_unused vback_porch; 400 unsigned int vtotal_lines, __maybe_unused vfieldrate_est; 401 unsigned int __maybe_unused hperiod; 402 unsigned int vfield_rate, __maybe_unused vframe_rate; 403 int left_margin, right_margin; 404 unsigned int total_active_pixels, ideal_duty_cycle; 405 unsigned int hblank, total_pixels, pixel_freq; 406 int hsync, hfront_porch, vodd_front_porch_lines; 407 unsigned int tmp1, tmp2; 408 409 if (!hdisplay || !vdisplay) 410 return NULL; 411 412 drm_mode = drm_mode_create(dev); 413 if (!drm_mode) 414 return NULL; 415 416 /* 1. In order to give correct results, the number of horizontal 417 * pixels requested is first processed to ensure that it is divisible 418 * by the character size, by rounding it to the nearest character 419 * cell boundary: 420 */ 421 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 422 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 423 424 /* 2. If interlace is requested, the number of vertical lines assumed 425 * by the calculation must be halved, as the computation calculates 426 * the number of vertical lines per field. 427 */ 428 if (interlaced) 429 vdisplay_rnd = vdisplay / 2; 430 else 431 vdisplay_rnd = vdisplay; 432 433 /* 3. Find the frame rate required: */ 434 if (interlaced) 435 vfieldrate_rqd = vrefresh * 2; 436 else 437 vfieldrate_rqd = vrefresh; 438 439 /* 4. Find number of lines in Top margin: */ 440 top_margin = 0; 441 if (margins) 442 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 443 1000; 444 /* 5. Find number of lines in bottom margin: */ 445 bottom_margin = top_margin; 446 447 /* 6. If interlace is required, then set variable interlace: */ 448 if (interlaced) 449 interlace = 1; 450 else 451 interlace = 0; 452 453 /* 7. Estimate the Horizontal frequency */ 454 { 455 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 456 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 457 2 + interlace; 458 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 459 } 460 461 /* 8. Find the number of lines in V sync + back porch */ 462 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 463 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 464 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 465 /* 9. Find the number of lines in V back porch alone: */ 466 vback_porch = vsync_plus_bp - V_SYNC_RQD; 467 /* 10. Find the total number of lines in Vertical field period: */ 468 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 469 vsync_plus_bp + GTF_MIN_V_PORCH; 470 /* 11. Estimate the Vertical field frequency: */ 471 vfieldrate_est = hfreq_est / vtotal_lines; 472 /* 12. Find the actual horizontal period: */ 473 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 474 475 /* 13. Find the actual Vertical field frequency: */ 476 vfield_rate = hfreq_est / vtotal_lines; 477 /* 14. Find the Vertical frame frequency: */ 478 if (interlaced) 479 vframe_rate = vfield_rate / 2; 480 else 481 vframe_rate = vfield_rate; 482 /* 15. Find number of pixels in left margin: */ 483 if (margins) 484 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 485 1000; 486 else 487 left_margin = 0; 488 489 /* 16.Find number of pixels in right margin: */ 490 right_margin = left_margin; 491 /* 17.Find total number of active pixels in image and left and right */ 492 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 493 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 494 ideal_duty_cycle = GTF_C_PRIME * 1000 - 495 (GTF_M_PRIME * 1000000 / hfreq_est); 496 /* 19.Find the number of pixels in the blanking time to the nearest 497 * double character cell: */ 498 hblank = total_active_pixels * ideal_duty_cycle / 499 (100000 - ideal_duty_cycle); 500 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 501 hblank = hblank * 2 * GTF_CELL_GRAN; 502 /* 20.Find total number of pixels: */ 503 total_pixels = total_active_pixels + hblank; 504 /* 21.Find pixel clock frequency: */ 505 pixel_freq = total_pixels * hfreq_est / 1000; 506 /* Stage 1 computations are now complete; I should really pass 507 * the results to another function and do the Stage 2 computations, 508 * but I only need a few more values so I'll just append the 509 * computations here for now */ 510 /* 17. Find the number of pixels in the horizontal sync period: */ 511 hsync = H_SYNC_PERCENT * total_pixels / 100; 512 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 513 hsync = hsync * GTF_CELL_GRAN; 514 /* 18. Find the number of pixels in horizontal front porch period */ 515 hfront_porch = hblank / 2 - hsync; 516 /* 36. Find the number of lines in the odd front porch period: */ 517 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 518 519 /* finally, pack the results in the mode struct */ 520 drm_mode->hdisplay = hdisplay_rnd; 521 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 522 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 523 drm_mode->htotal = total_pixels; 524 drm_mode->vdisplay = vdisplay_rnd; 525 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 526 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 527 drm_mode->vtotal = vtotal_lines; 528 529 drm_mode->clock = pixel_freq; 530 531 if (interlaced) { 532 drm_mode->vtotal *= 2; 533 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 534 } 535 536 drm_mode_set_name(drm_mode); 537 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 538 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 539 else 540 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 541 542 return drm_mode; 543 } 544 EXPORT_SYMBOL(drm_gtf_mode_complex); 545 546 /** 547 * drm_gtf_mode - create the modeline based on the GTF algorithm 548 * @dev: drm device 549 * @hdisplay: hdisplay size 550 * @vdisplay: vdisplay size 551 * @vrefresh: vrefresh rate. 552 * @interlaced: whether to compute an interlaced mode 553 * @margins: desired margin (borders) size 554 * 555 * return the modeline based on GTF algorithm 556 * 557 * This function is to create the modeline based on the GTF algorithm. 558 * Generalized Timing Formula is derived from: 559 * 560 * GTF Spreadsheet by Andy Morrish (1/5/97) 561 * available at http://www.vesa.org 562 * 563 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 564 * What I have done is to translate it by using integer calculation. 565 * I also refer to the function of fb_get_mode in the file of 566 * drivers/video/fbmon.c 567 * 568 * Standard GTF parameters:: 569 * 570 * M = 600 571 * C = 40 572 * K = 128 573 * J = 20 574 * 575 * Returns: 576 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 577 * The display mode object is allocated with drm_mode_create(). Returns NULL 578 * when no mode could be allocated. 579 */ 580 struct drm_display_mode * 581 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 582 bool interlaced, int margins) 583 { 584 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 585 interlaced, margins, 586 600, 40 * 2, 128, 20 * 2); 587 } 588 EXPORT_SYMBOL(drm_gtf_mode); 589 590 #ifdef CONFIG_VIDEOMODE_HELPERS 591 /** 592 * drm_display_mode_from_videomode - fill in @dmode using @vm, 593 * @vm: videomode structure to use as source 594 * @dmode: drm_display_mode structure to use as destination 595 * 596 * Fills out @dmode using the display mode specified in @vm. 597 */ 598 void drm_display_mode_from_videomode(const struct videomode *vm, 599 struct drm_display_mode *dmode) 600 { 601 dmode->hdisplay = vm->hactive; 602 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 603 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 604 dmode->htotal = dmode->hsync_end + vm->hback_porch; 605 606 dmode->vdisplay = vm->vactive; 607 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 608 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 609 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 610 611 dmode->clock = vm->pixelclock / 1000; 612 613 dmode->flags = 0; 614 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 615 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 616 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 617 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 618 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 619 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 620 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 621 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 622 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 623 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 624 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 625 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 626 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 627 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 628 drm_mode_set_name(dmode); 629 } 630 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 631 632 /** 633 * drm_display_mode_to_videomode - fill in @vm using @dmode, 634 * @dmode: drm_display_mode structure to use as source 635 * @vm: videomode structure to use as destination 636 * 637 * Fills out @vm using the display mode specified in @dmode. 638 */ 639 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 640 struct videomode *vm) 641 { 642 vm->hactive = dmode->hdisplay; 643 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 644 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 645 vm->hback_porch = dmode->htotal - dmode->hsync_end; 646 647 vm->vactive = dmode->vdisplay; 648 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 649 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 650 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 651 652 vm->pixelclock = dmode->clock * 1000; 653 654 vm->flags = 0; 655 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 656 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 657 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 658 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 659 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 660 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 661 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 662 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 663 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 664 vm->flags |= DISPLAY_FLAGS_INTERLACED; 665 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 666 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 667 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 668 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 669 } 670 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 671 672 /** 673 * drm_bus_flags_from_videomode - extract information about pixelclk and 674 * DE polarity from videomode and store it in a separate variable 675 * @vm: videomode structure to use 676 * @bus_flags: information about pixelclk, sync and DE polarity will be stored 677 * here 678 * 679 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH), DRM_BUS_FLAG_PIXDATA_DRIVE_(POS|NEG)EDGE 680 * and DISPLAY_FLAGS_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS 681 * found in @vm 682 */ 683 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) 684 { 685 *bus_flags = 0; 686 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) 687 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE; 688 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 689 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; 690 691 if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE) 692 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE; 693 if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE) 694 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE; 695 696 if (vm->flags & DISPLAY_FLAGS_DE_LOW) 697 *bus_flags |= DRM_BUS_FLAG_DE_LOW; 698 if (vm->flags & DISPLAY_FLAGS_DE_HIGH) 699 *bus_flags |= DRM_BUS_FLAG_DE_HIGH; 700 } 701 EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); 702 703 #ifdef CONFIG_OF 704 /** 705 * of_get_drm_display_mode - get a drm_display_mode from devicetree 706 * @np: device_node with the timing specification 707 * @dmode: will be set to the return value 708 * @bus_flags: information about pixelclk, sync and DE polarity 709 * @index: index into the list of display timings in devicetree 710 * 711 * This function is expensive and should only be used, if only one mode is to be 712 * read from DT. To get multiple modes start with of_get_display_timings and 713 * work with that instead. 714 * 715 * Returns: 716 * 0 on success, a negative errno code when no of videomode node was found. 717 */ 718 int of_get_drm_display_mode(struct device_node *np, 719 struct drm_display_mode *dmode, u32 *bus_flags, 720 int index) 721 { 722 struct videomode vm; 723 int ret; 724 725 ret = of_get_videomode(np, &vm, index); 726 if (ret) 727 return ret; 728 729 drm_display_mode_from_videomode(&vm, dmode); 730 if (bus_flags) 731 drm_bus_flags_from_videomode(&vm, bus_flags); 732 733 pr_debug("%pOF: got %dx%d display mode\n", 734 np, vm.hactive, vm.vactive); 735 drm_mode_debug_printmodeline(dmode); 736 737 return 0; 738 } 739 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 740 #endif /* CONFIG_OF */ 741 #endif /* CONFIG_VIDEOMODE_HELPERS */ 742 743 /** 744 * drm_mode_set_name - set the name on a mode 745 * @mode: name will be set in this mode 746 * 747 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 748 * with an optional 'i' suffix for interlaced modes. 749 */ 750 void drm_mode_set_name(struct drm_display_mode *mode) 751 { 752 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 753 754 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 755 mode->hdisplay, mode->vdisplay, 756 interlaced ? "i" : ""); 757 } 758 EXPORT_SYMBOL(drm_mode_set_name); 759 760 /** 761 * drm_mode_hsync - get the hsync of a mode 762 * @mode: mode 763 * 764 * Returns: 765 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the 766 * value first if it is not yet set. 767 */ 768 int drm_mode_hsync(const struct drm_display_mode *mode) 769 { 770 unsigned int calc_val; 771 772 if (mode->hsync) 773 return mode->hsync; 774 775 if (mode->htotal <= 0) 776 return 0; 777 778 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ 779 calc_val += 500; /* round to 1000Hz */ 780 calc_val /= 1000; /* truncate to kHz */ 781 782 return calc_val; 783 } 784 EXPORT_SYMBOL(drm_mode_hsync); 785 786 /** 787 * drm_mode_vrefresh - get the vrefresh of a mode 788 * @mode: mode 789 * 790 * Returns: 791 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 792 * value first if it is not yet set. 793 */ 794 int drm_mode_vrefresh(const struct drm_display_mode *mode) 795 { 796 int refresh = 0; 797 798 if (mode->vrefresh > 0) 799 refresh = mode->vrefresh; 800 else if (mode->htotal > 0 && mode->vtotal > 0) { 801 unsigned int num, den; 802 803 num = mode->clock * 1000; 804 den = mode->htotal * mode->vtotal; 805 806 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 807 num *= 2; 808 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 809 den *= 2; 810 if (mode->vscan > 1) 811 den *= mode->vscan; 812 813 refresh = DIV_ROUND_CLOSEST(num, den); 814 } 815 return refresh; 816 } 817 EXPORT_SYMBOL(drm_mode_vrefresh); 818 819 /** 820 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode 821 * @mode: mode to query 822 * @hdisplay: hdisplay value to fill in 823 * @vdisplay: vdisplay value to fill in 824 * 825 * The vdisplay value will be doubled if the specified mode is a stereo mode of 826 * the appropriate layout. 827 */ 828 void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 829 int *hdisplay, int *vdisplay) 830 { 831 struct drm_display_mode adjusted = *mode; 832 833 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 834 *hdisplay = adjusted.crtc_hdisplay; 835 *vdisplay = adjusted.crtc_vdisplay; 836 } 837 EXPORT_SYMBOL(drm_mode_get_hv_timing); 838 839 /** 840 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 841 * @p: mode 842 * @adjust_flags: a combination of adjustment flags 843 * 844 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 845 * 846 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 847 * interlaced modes. 848 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 849 * buffers containing two eyes (only adjust the timings when needed, eg. for 850 * "frame packing" or "side by side full"). 851 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 852 * be performed for doublescan and vscan > 1 modes respectively. 853 */ 854 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 855 { 856 if (!p) 857 return; 858 859 p->crtc_clock = p->clock; 860 p->crtc_hdisplay = p->hdisplay; 861 p->crtc_hsync_start = p->hsync_start; 862 p->crtc_hsync_end = p->hsync_end; 863 p->crtc_htotal = p->htotal; 864 p->crtc_hskew = p->hskew; 865 p->crtc_vdisplay = p->vdisplay; 866 p->crtc_vsync_start = p->vsync_start; 867 p->crtc_vsync_end = p->vsync_end; 868 p->crtc_vtotal = p->vtotal; 869 870 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 871 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 872 p->crtc_vdisplay /= 2; 873 p->crtc_vsync_start /= 2; 874 p->crtc_vsync_end /= 2; 875 p->crtc_vtotal /= 2; 876 } 877 } 878 879 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 880 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 881 p->crtc_vdisplay *= 2; 882 p->crtc_vsync_start *= 2; 883 p->crtc_vsync_end *= 2; 884 p->crtc_vtotal *= 2; 885 } 886 } 887 888 if (!(adjust_flags & CRTC_NO_VSCAN)) { 889 if (p->vscan > 1) { 890 p->crtc_vdisplay *= p->vscan; 891 p->crtc_vsync_start *= p->vscan; 892 p->crtc_vsync_end *= p->vscan; 893 p->crtc_vtotal *= p->vscan; 894 } 895 } 896 897 if (adjust_flags & CRTC_STEREO_DOUBLE) { 898 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 899 900 switch (layout) { 901 case DRM_MODE_FLAG_3D_FRAME_PACKING: 902 p->crtc_clock *= 2; 903 p->crtc_vdisplay += p->crtc_vtotal; 904 p->crtc_vsync_start += p->crtc_vtotal; 905 p->crtc_vsync_end += p->crtc_vtotal; 906 p->crtc_vtotal += p->crtc_vtotal; 907 break; 908 } 909 } 910 911 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 912 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 913 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 914 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 915 } 916 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 917 918 /** 919 * drm_mode_copy - copy the mode 920 * @dst: mode to overwrite 921 * @src: mode to copy 922 * 923 * Copy an existing mode into another mode, preserving the object id and 924 * list head of the destination mode. 925 */ 926 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 927 { 928 struct list_head head = dst->head; 929 930 *dst = *src; 931 dst->head = head; 932 } 933 EXPORT_SYMBOL(drm_mode_copy); 934 935 /** 936 * drm_mode_duplicate - allocate and duplicate an existing mode 937 * @dev: drm_device to allocate the duplicated mode for 938 * @mode: mode to duplicate 939 * 940 * Just allocate a new mode, copy the existing mode into it, and return 941 * a pointer to it. Used to create new instances of established modes. 942 * 943 * Returns: 944 * Pointer to duplicated mode on success, NULL on error. 945 */ 946 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 947 const struct drm_display_mode *mode) 948 { 949 struct drm_display_mode *nmode; 950 951 nmode = drm_mode_create(dev); 952 if (!nmode) 953 return NULL; 954 955 drm_mode_copy(nmode, mode); 956 957 return nmode; 958 } 959 EXPORT_SYMBOL(drm_mode_duplicate); 960 961 static bool drm_mode_match_timings(const struct drm_display_mode *mode1, 962 const struct drm_display_mode *mode2) 963 { 964 return mode1->hdisplay == mode2->hdisplay && 965 mode1->hsync_start == mode2->hsync_start && 966 mode1->hsync_end == mode2->hsync_end && 967 mode1->htotal == mode2->htotal && 968 mode1->hskew == mode2->hskew && 969 mode1->vdisplay == mode2->vdisplay && 970 mode1->vsync_start == mode2->vsync_start && 971 mode1->vsync_end == mode2->vsync_end && 972 mode1->vtotal == mode2->vtotal && 973 mode1->vscan == mode2->vscan; 974 } 975 976 static bool drm_mode_match_clock(const struct drm_display_mode *mode1, 977 const struct drm_display_mode *mode2) 978 { 979 /* 980 * do clock check convert to PICOS 981 * so fb modes get matched the same 982 */ 983 if (mode1->clock && mode2->clock) 984 return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock); 985 else 986 return mode1->clock == mode2->clock; 987 } 988 989 static bool drm_mode_match_flags(const struct drm_display_mode *mode1, 990 const struct drm_display_mode *mode2) 991 { 992 return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 993 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK); 994 } 995 996 static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1, 997 const struct drm_display_mode *mode2) 998 { 999 return (mode1->flags & DRM_MODE_FLAG_3D_MASK) == 1000 (mode2->flags & DRM_MODE_FLAG_3D_MASK); 1001 } 1002 1003 static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1, 1004 const struct drm_display_mode *mode2) 1005 { 1006 return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio; 1007 } 1008 1009 /** 1010 * drm_mode_match - test modes for (partial) equality 1011 * @mode1: first mode 1012 * @mode2: second mode 1013 * @match_flags: which parts need to match (DRM_MODE_MATCH_*) 1014 * 1015 * Check to see if @mode1 and @mode2 are equivalent. 1016 * 1017 * Returns: 1018 * True if the modes are (partially) equal, false otherwise. 1019 */ 1020 bool drm_mode_match(const struct drm_display_mode *mode1, 1021 const struct drm_display_mode *mode2, 1022 unsigned int match_flags) 1023 { 1024 if (!mode1 && !mode2) 1025 return true; 1026 1027 if (!mode1 || !mode2) 1028 return false; 1029 1030 if (match_flags & DRM_MODE_MATCH_TIMINGS && 1031 !drm_mode_match_timings(mode1, mode2)) 1032 return false; 1033 1034 if (match_flags & DRM_MODE_MATCH_CLOCK && 1035 !drm_mode_match_clock(mode1, mode2)) 1036 return false; 1037 1038 if (match_flags & DRM_MODE_MATCH_FLAGS && 1039 !drm_mode_match_flags(mode1, mode2)) 1040 return false; 1041 1042 if (match_flags & DRM_MODE_MATCH_3D_FLAGS && 1043 !drm_mode_match_3d_flags(mode1, mode2)) 1044 return false; 1045 1046 if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO && 1047 !drm_mode_match_aspect_ratio(mode1, mode2)) 1048 return false; 1049 1050 return true; 1051 } 1052 EXPORT_SYMBOL(drm_mode_match); 1053 1054 /** 1055 * drm_mode_equal - test modes for equality 1056 * @mode1: first mode 1057 * @mode2: second mode 1058 * 1059 * Check to see if @mode1 and @mode2 are equivalent. 1060 * 1061 * Returns: 1062 * True if the modes are equal, false otherwise. 1063 */ 1064 bool drm_mode_equal(const struct drm_display_mode *mode1, 1065 const struct drm_display_mode *mode2) 1066 { 1067 return drm_mode_match(mode1, mode2, 1068 DRM_MODE_MATCH_TIMINGS | 1069 DRM_MODE_MATCH_CLOCK | 1070 DRM_MODE_MATCH_FLAGS | 1071 DRM_MODE_MATCH_3D_FLAGS| 1072 DRM_MODE_MATCH_ASPECT_RATIO); 1073 } 1074 EXPORT_SYMBOL(drm_mode_equal); 1075 1076 /** 1077 * drm_mode_equal_no_clocks - test modes for equality 1078 * @mode1: first mode 1079 * @mode2: second mode 1080 * 1081 * Check to see if @mode1 and @mode2 are equivalent, but 1082 * don't check the pixel clocks. 1083 * 1084 * Returns: 1085 * True if the modes are equal, false otherwise. 1086 */ 1087 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, 1088 const struct drm_display_mode *mode2) 1089 { 1090 return drm_mode_match(mode1, mode2, 1091 DRM_MODE_MATCH_TIMINGS | 1092 DRM_MODE_MATCH_FLAGS | 1093 DRM_MODE_MATCH_3D_FLAGS); 1094 } 1095 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 1096 1097 /** 1098 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 1099 * @mode1: first mode 1100 * @mode2: second mode 1101 * 1102 * Check to see if @mode1 and @mode2 are equivalent, but 1103 * don't check the pixel clocks nor the stereo layout. 1104 * 1105 * Returns: 1106 * True if the modes are equal, false otherwise. 1107 */ 1108 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 1109 const struct drm_display_mode *mode2) 1110 { 1111 return drm_mode_match(mode1, mode2, 1112 DRM_MODE_MATCH_TIMINGS | 1113 DRM_MODE_MATCH_FLAGS); 1114 } 1115 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1116 1117 static enum drm_mode_status 1118 drm_mode_validate_basic(const struct drm_display_mode *mode) 1119 { 1120 if (mode->type & ~DRM_MODE_TYPE_ALL) 1121 return MODE_BAD; 1122 1123 if (mode->flags & ~DRM_MODE_FLAG_ALL) 1124 return MODE_BAD; 1125 1126 if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1127 return MODE_BAD; 1128 1129 if (mode->clock == 0) 1130 return MODE_CLOCK_LOW; 1131 1132 if (mode->hdisplay == 0 || 1133 mode->hsync_start < mode->hdisplay || 1134 mode->hsync_end < mode->hsync_start || 1135 mode->htotal < mode->hsync_end) 1136 return MODE_H_ILLEGAL; 1137 1138 if (mode->vdisplay == 0 || 1139 mode->vsync_start < mode->vdisplay || 1140 mode->vsync_end < mode->vsync_start || 1141 mode->vtotal < mode->vsync_end) 1142 return MODE_V_ILLEGAL; 1143 1144 return MODE_OK; 1145 } 1146 1147 /** 1148 * drm_mode_validate_driver - make sure the mode is somewhat sane 1149 * @dev: drm device 1150 * @mode: mode to check 1151 * 1152 * First do basic validation on the mode, and then allow the driver 1153 * to check for device/driver specific limitations via the optional 1154 * &drm_mode_config_helper_funcs.mode_valid hook. 1155 * 1156 * Returns: 1157 * The mode status 1158 */ 1159 enum drm_mode_status 1160 drm_mode_validate_driver(struct drm_device *dev, 1161 const struct drm_display_mode *mode) 1162 { 1163 enum drm_mode_status status; 1164 1165 status = drm_mode_validate_basic(mode); 1166 if (status != MODE_OK) 1167 return status; 1168 1169 if (dev->mode_config.funcs->mode_valid) 1170 return dev->mode_config.funcs->mode_valid(dev, mode); 1171 else 1172 return MODE_OK; 1173 } 1174 EXPORT_SYMBOL(drm_mode_validate_driver); 1175 1176 /** 1177 * drm_mode_validate_size - make sure modes adhere to size constraints 1178 * @mode: mode to check 1179 * @maxX: maximum width 1180 * @maxY: maximum height 1181 * 1182 * This function is a helper which can be used to validate modes against size 1183 * limitations of the DRM device/connector. If a mode is too big its status 1184 * member is updated with the appropriate validation failure code. The list 1185 * itself is not changed. 1186 * 1187 * Returns: 1188 * The mode status 1189 */ 1190 enum drm_mode_status 1191 drm_mode_validate_size(const struct drm_display_mode *mode, 1192 int maxX, int maxY) 1193 { 1194 if (maxX > 0 && mode->hdisplay > maxX) 1195 return MODE_VIRTUAL_X; 1196 1197 #if defined(DRM_MAX_RESOLUTION_HORIZONTAL) 1198 if (mode->hdisplay > DRM_MAX_RESOLUTION_HORIZONTAL) 1199 return MODE_VIRTUAL_X; 1200 #endif 1201 1202 if (maxY > 0 && mode->vdisplay > maxY) 1203 return MODE_VIRTUAL_Y; 1204 1205 #if defined(DRM_MAX_RESOLUTION_VERTICAL) 1206 if (mode->vdisplay > DRM_MAX_RESOLUTION_VERTICAL) 1207 return MODE_VIRTUAL_Y; 1208 #endif 1209 1210 return MODE_OK; 1211 } 1212 EXPORT_SYMBOL(drm_mode_validate_size); 1213 1214 /** 1215 * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed 1216 * @mode: mode to check 1217 * @connector: drm connector under action 1218 * 1219 * This function is a helper which can be used to filter out any YCBCR420 1220 * only mode, when the source doesn't support it. 1221 * 1222 * Returns: 1223 * The mode status 1224 */ 1225 enum drm_mode_status 1226 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode, 1227 struct drm_connector *connector) 1228 { 1229 u8 vic = drm_match_cea_mode(mode); 1230 enum drm_mode_status status = MODE_OK; 1231 struct drm_hdmi_info *hdmi = &connector->display_info.hdmi; 1232 1233 if (test_bit(vic, hdmi->y420_vdb_modes)) { 1234 if (!connector->ycbcr_420_allowed) 1235 status = MODE_NO_420; 1236 } 1237 1238 return status; 1239 } 1240 EXPORT_SYMBOL(drm_mode_validate_ycbcr420); 1241 1242 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1243 1244 static const char * const drm_mode_status_names[] = { 1245 MODE_STATUS(OK), 1246 MODE_STATUS(HSYNC), 1247 MODE_STATUS(VSYNC), 1248 MODE_STATUS(H_ILLEGAL), 1249 MODE_STATUS(V_ILLEGAL), 1250 MODE_STATUS(BAD_WIDTH), 1251 MODE_STATUS(NOMODE), 1252 MODE_STATUS(NO_INTERLACE), 1253 MODE_STATUS(NO_DBLESCAN), 1254 MODE_STATUS(NO_VSCAN), 1255 MODE_STATUS(MEM), 1256 MODE_STATUS(VIRTUAL_X), 1257 MODE_STATUS(VIRTUAL_Y), 1258 MODE_STATUS(MEM_VIRT), 1259 MODE_STATUS(NOCLOCK), 1260 MODE_STATUS(CLOCK_HIGH), 1261 MODE_STATUS(CLOCK_LOW), 1262 MODE_STATUS(CLOCK_RANGE), 1263 MODE_STATUS(BAD_HVALUE), 1264 MODE_STATUS(BAD_VVALUE), 1265 MODE_STATUS(BAD_VSCAN), 1266 MODE_STATUS(HSYNC_NARROW), 1267 MODE_STATUS(HSYNC_WIDE), 1268 MODE_STATUS(HBLANK_NARROW), 1269 MODE_STATUS(HBLANK_WIDE), 1270 MODE_STATUS(VSYNC_NARROW), 1271 MODE_STATUS(VSYNC_WIDE), 1272 MODE_STATUS(VBLANK_NARROW), 1273 MODE_STATUS(VBLANK_WIDE), 1274 MODE_STATUS(PANEL), 1275 MODE_STATUS(INTERLACE_WIDTH), 1276 MODE_STATUS(ONE_WIDTH), 1277 MODE_STATUS(ONE_HEIGHT), 1278 MODE_STATUS(ONE_SIZE), 1279 MODE_STATUS(NO_REDUCED), 1280 MODE_STATUS(NO_STEREO), 1281 MODE_STATUS(NO_420), 1282 MODE_STATUS(STALE), 1283 MODE_STATUS(BAD), 1284 MODE_STATUS(ERROR), 1285 }; 1286 1287 #undef MODE_STATUS 1288 1289 const char *drm_get_mode_status_name(enum drm_mode_status status) 1290 { 1291 int index = status + 3; 1292 1293 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1294 return ""; 1295 1296 return drm_mode_status_names[index]; 1297 } 1298 1299 /** 1300 * drm_mode_prune_invalid - remove invalid modes from mode list 1301 * @dev: DRM device 1302 * @mode_list: list of modes to check 1303 * @verbose: be verbose about it 1304 * 1305 * This helper function can be used to prune a display mode list after 1306 * validation has been completed. All modes whose status is not MODE_OK will be 1307 * removed from the list, and if @verbose the status code and mode name is also 1308 * printed to dmesg. 1309 */ 1310 void drm_mode_prune_invalid(struct drm_device *dev, 1311 struct list_head *mode_list, bool verbose) 1312 { 1313 struct drm_display_mode *mode, *t; 1314 1315 list_for_each_entry_safe(mode, t, mode_list, head) { 1316 if (mode->status != MODE_OK) { 1317 list_del(&mode->head); 1318 if (verbose) { 1319 drm_mode_debug_printmodeline(mode); 1320 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1321 mode->name, 1322 drm_get_mode_status_name(mode->status)); 1323 } 1324 drm_mode_destroy(dev, mode); 1325 } 1326 } 1327 } 1328 EXPORT_SYMBOL(drm_mode_prune_invalid); 1329 1330 /** 1331 * drm_mode_compare - compare modes for favorability 1332 * @priv: unused 1333 * @lh_a: list_head for first mode 1334 * @lh_b: list_head for second mode 1335 * 1336 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1337 * which is better. 1338 * 1339 * Returns: 1340 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1341 * positive if @lh_b is better than @lh_a. 1342 */ 1343 static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) 1344 { 1345 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1346 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1347 int diff; 1348 1349 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1350 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1351 if (diff) 1352 return diff; 1353 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1354 if (diff) 1355 return diff; 1356 1357 diff = b->vrefresh - a->vrefresh; 1358 if (diff) 1359 return diff; 1360 1361 diff = b->clock - a->clock; 1362 return diff; 1363 } 1364 1365 /** 1366 * drm_mode_sort - sort mode list 1367 * @mode_list: list of drm_display_mode structures to sort 1368 * 1369 * Sort @mode_list by favorability, moving good modes to the head of the list. 1370 */ 1371 void drm_mode_sort(struct list_head *mode_list) 1372 { 1373 list_sort(NULL, mode_list, drm_mode_compare); 1374 } 1375 EXPORT_SYMBOL(drm_mode_sort); 1376 1377 /** 1378 * drm_connector_list_update - update the mode list for the connector 1379 * @connector: the connector to update 1380 * 1381 * This moves the modes from the @connector probed_modes list 1382 * to the actual mode list. It compares the probed mode against the current 1383 * list and only adds different/new modes. 1384 * 1385 * This is just a helper functions doesn't validate any modes itself and also 1386 * doesn't prune any invalid modes. Callers need to do that themselves. 1387 */ 1388 void drm_connector_list_update(struct drm_connector *connector) 1389 { 1390 struct drm_display_mode *pmode, *pt; 1391 1392 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1393 1394 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1395 struct drm_display_mode *mode; 1396 bool found_it = false; 1397 1398 /* go through current modes checking for the new probed mode */ 1399 list_for_each_entry(mode, &connector->modes, head) { 1400 if (!drm_mode_equal(pmode, mode)) 1401 continue; 1402 1403 found_it = true; 1404 1405 /* 1406 * If the old matching mode is stale (ie. left over 1407 * from a previous probe) just replace it outright. 1408 * Otherwise just merge the type bits between all 1409 * equal probed modes. 1410 * 1411 * If two probed modes are considered equal, pick the 1412 * actual timings from the one that's marked as 1413 * preferred (in case the match isn't 100%). If 1414 * multiple or zero preferred modes are present, favor 1415 * the mode added to the probed_modes list first. 1416 */ 1417 if (mode->status == MODE_STALE) { 1418 drm_mode_copy(mode, pmode); 1419 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1420 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1421 pmode->type |= mode->type; 1422 drm_mode_copy(mode, pmode); 1423 } else { 1424 mode->type |= pmode->type; 1425 } 1426 1427 list_del(&pmode->head); 1428 drm_mode_destroy(connector->dev, pmode); 1429 break; 1430 } 1431 1432 if (!found_it) { 1433 list_move_tail(&pmode->head, &connector->modes); 1434 } 1435 } 1436 } 1437 EXPORT_SYMBOL(drm_connector_list_update); 1438 1439 static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, 1440 struct drm_cmdline_mode *mode) 1441 { 1442 unsigned int bpp; 1443 1444 if (str[0] != '-') 1445 return -EINVAL; 1446 1447 str++; 1448 bpp = simple_strtol(str, end_ptr, 10); 1449 if (*end_ptr == str) 1450 return -EINVAL; 1451 1452 mode->bpp = bpp; 1453 mode->bpp_specified = true; 1454 1455 return 0; 1456 } 1457 1458 static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, 1459 struct drm_cmdline_mode *mode) 1460 { 1461 unsigned int refresh; 1462 1463 if (str[0] != '@') 1464 return -EINVAL; 1465 1466 str++; 1467 refresh = simple_strtol(str, end_ptr, 10); 1468 if (*end_ptr == str) 1469 return -EINVAL; 1470 1471 mode->refresh = refresh; 1472 mode->refresh_specified = true; 1473 1474 return 0; 1475 } 1476 1477 static int drm_mode_parse_cmdline_extra(const char *str, int length, 1478 bool freestanding, 1479 const struct drm_connector *connector, 1480 struct drm_cmdline_mode *mode) 1481 { 1482 int i; 1483 1484 for (i = 0; i < length; i++) { 1485 switch (str[i]) { 1486 case 'i': 1487 if (freestanding) 1488 return -EINVAL; 1489 1490 mode->interlace = true; 1491 break; 1492 case 'm': 1493 if (freestanding) 1494 return -EINVAL; 1495 1496 mode->margins = true; 1497 break; 1498 case 'D': 1499 if (mode->force != DRM_FORCE_UNSPECIFIED) 1500 return -EINVAL; 1501 1502 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1503 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1504 mode->force = DRM_FORCE_ON; 1505 else 1506 mode->force = DRM_FORCE_ON_DIGITAL; 1507 break; 1508 case 'd': 1509 if (mode->force != DRM_FORCE_UNSPECIFIED) 1510 return -EINVAL; 1511 1512 mode->force = DRM_FORCE_OFF; 1513 break; 1514 case 'e': 1515 if (mode->force != DRM_FORCE_UNSPECIFIED) 1516 return -EINVAL; 1517 1518 mode->force = DRM_FORCE_ON; 1519 break; 1520 default: 1521 return -EINVAL; 1522 } 1523 } 1524 1525 return 0; 1526 } 1527 1528 static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, 1529 bool extras, 1530 const struct drm_connector *connector, 1531 struct drm_cmdline_mode *mode) 1532 { 1533 const char *str_start = str; 1534 bool rb = false, cvt = false; 1535 int xres = 0, yres = 0; 1536 int remaining, i; 1537 char *end_ptr; 1538 1539 xres = simple_strtol(str, &end_ptr, 10); 1540 if (end_ptr == str) 1541 return -EINVAL; 1542 1543 if (end_ptr[0] != 'x') 1544 return -EINVAL; 1545 end_ptr++; 1546 1547 str = end_ptr; 1548 yres = simple_strtol(str, &end_ptr, 10); 1549 if (end_ptr == str) 1550 return -EINVAL; 1551 1552 remaining = length - (end_ptr - str_start); 1553 if (remaining < 0) 1554 return -EINVAL; 1555 1556 for (i = 0; i < remaining; i++) { 1557 switch (end_ptr[i]) { 1558 case 'M': 1559 cvt = true; 1560 break; 1561 case 'R': 1562 rb = true; 1563 break; 1564 default: 1565 /* 1566 * Try to pass that to our extras parsing 1567 * function to handle the case where the 1568 * extras are directly after the resolution 1569 */ 1570 if (extras) { 1571 int ret = drm_mode_parse_cmdline_extra(end_ptr + i, 1572 1, 1573 false, 1574 connector, 1575 mode); 1576 if (ret) 1577 return ret; 1578 } else { 1579 return -EINVAL; 1580 } 1581 } 1582 } 1583 1584 mode->xres = xres; 1585 mode->yres = yres; 1586 mode->cvt = cvt; 1587 mode->rb = rb; 1588 1589 return 0; 1590 } 1591 1592 static int drm_mode_parse_cmdline_int(const char *delim, unsigned int *int_ret) 1593 { 1594 const char *value; 1595 char *endp; 1596 1597 /* 1598 * delim must point to the '=', otherwise it is a syntax error and 1599 * if delim points to the terminating zero, then delim + 1 wil point 1600 * past the end of the string. 1601 */ 1602 if (*delim != '=') 1603 return -EINVAL; 1604 1605 value = delim + 1; 1606 *int_ret = simple_strtol(value, &endp, 10); 1607 1608 /* Make sure we have parsed something */ 1609 if (endp == value) 1610 return -EINVAL; 1611 1612 return 0; 1613 } 1614 1615 static int drm_mode_parse_panel_orientation(const char *delim, 1616 struct drm_cmdline_mode *mode) 1617 { 1618 const char *value; 1619 1620 if (*delim != '=') 1621 return -EINVAL; 1622 1623 value = delim + 1; 1624 delim = strchr(value, ','); 1625 if (!delim) 1626 delim = value + strlen(value); 1627 1628 if (!strncmp(value, "normal", delim - value)) 1629 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL; 1630 else if (!strncmp(value, "upside_down", delim - value)) 1631 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP; 1632 else if (!strncmp(value, "left_side_up", delim - value)) 1633 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP; 1634 else if (!strncmp(value, "right_side_up", delim - value)) 1635 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP; 1636 else 1637 return -EINVAL; 1638 1639 return 0; 1640 } 1641 1642 static int drm_mode_parse_cmdline_options(const char *str, 1643 bool freestanding, 1644 const struct drm_connector *connector, 1645 struct drm_cmdline_mode *mode) 1646 { 1647 unsigned int deg, margin, rotation = 0; 1648 const char *delim, *option, *sep; 1649 1650 option = str; 1651 do { 1652 delim = strchr(option, '='); 1653 if (!delim) { 1654 delim = strchr(option, ','); 1655 1656 if (!delim) 1657 delim = option + strlen(option); 1658 } 1659 1660 if (!strncmp(option, "rotate", delim - option)) { 1661 if (drm_mode_parse_cmdline_int(delim, °)) 1662 return -EINVAL; 1663 1664 switch (deg) { 1665 case 0: 1666 rotation |= DRM_MODE_ROTATE_0; 1667 break; 1668 1669 case 90: 1670 rotation |= DRM_MODE_ROTATE_90; 1671 break; 1672 1673 case 180: 1674 rotation |= DRM_MODE_ROTATE_180; 1675 break; 1676 1677 case 270: 1678 rotation |= DRM_MODE_ROTATE_270; 1679 break; 1680 1681 default: 1682 return -EINVAL; 1683 } 1684 } else if (!strncmp(option, "reflect_x", delim - option)) { 1685 rotation |= DRM_MODE_REFLECT_X; 1686 } else if (!strncmp(option, "reflect_y", delim - option)) { 1687 rotation |= DRM_MODE_REFLECT_Y; 1688 } else if (!strncmp(option, "margin_right", delim - option)) { 1689 if (drm_mode_parse_cmdline_int(delim, &margin)) 1690 return -EINVAL; 1691 1692 mode->tv_margins.right = margin; 1693 } else if (!strncmp(option, "margin_left", delim - option)) { 1694 if (drm_mode_parse_cmdline_int(delim, &margin)) 1695 return -EINVAL; 1696 1697 mode->tv_margins.left = margin; 1698 } else if (!strncmp(option, "margin_top", delim - option)) { 1699 if (drm_mode_parse_cmdline_int(delim, &margin)) 1700 return -EINVAL; 1701 1702 mode->tv_margins.top = margin; 1703 } else if (!strncmp(option, "margin_bottom", delim - option)) { 1704 if (drm_mode_parse_cmdline_int(delim, &margin)) 1705 return -EINVAL; 1706 1707 mode->tv_margins.bottom = margin; 1708 } else if (!strncmp(option, "panel_orientation", delim - option)) { 1709 if (drm_mode_parse_panel_orientation(delim, mode)) 1710 return -EINVAL; 1711 } else { 1712 return -EINVAL; 1713 } 1714 sep = strchr(delim, ','); 1715 option = sep + 1; 1716 } while (sep); 1717 1718 if (rotation && freestanding) 1719 return -EINVAL; 1720 1721 if (!(rotation & DRM_MODE_ROTATE_MASK)) 1722 rotation |= DRM_MODE_ROTATE_0; 1723 1724 /* Make sure there is exactly one rotation defined */ 1725 if (!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK)) 1726 return -EINVAL; 1727 1728 mode->rotation_reflection = rotation; 1729 1730 return 0; 1731 } 1732 1733 static const char * const drm_named_modes_whitelist[] = { 1734 "NTSC", 1735 "PAL", 1736 }; 1737 1738 /** 1739 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1740 * @mode_option: optional per connector mode option 1741 * @connector: connector to parse modeline for 1742 * @mode: preallocated drm_cmdline_mode structure to fill out 1743 * 1744 * This parses @mode_option command line modeline for modes and options to 1745 * configure the connector. If @mode_option is NULL the default command line 1746 * modeline in fb_mode_option will be parsed instead. 1747 * 1748 * This uses the same parameters as the fb modedb.c, except for an extra 1749 * force-enable, force-enable-digital and force-disable bit at the end:: 1750 * 1751 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1752 * 1753 * Additionals options can be provided following the mode, using a comma to 1754 * separate each option. Valid options can be found in 1755 * Documentation/fb/modedb.rst. 1756 * 1757 * The intermediate drm_cmdline_mode structure is required to store additional 1758 * options from the command line modline like the force-enable/disable flag. 1759 * 1760 * Returns: 1761 * True if a valid modeline has been parsed, false otherwise. 1762 */ 1763 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1764 const struct drm_connector *connector, 1765 struct drm_cmdline_mode *mode) 1766 { 1767 const char *name; 1768 bool freestanding = false, parse_extras = false; 1769 unsigned int bpp_off = 0, refresh_off = 0, options_off = 0; 1770 unsigned int mode_end = 0; 1771 const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; 1772 const char *options_ptr = NULL; 1773 char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; 1774 int i, len, ret; 1775 1776 memset(mode, 0, sizeof(*mode)); 1777 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 1778 1779 if (!mode_option) 1780 return false; 1781 1782 name = mode_option; 1783 1784 /* Try to locate the bpp and refresh specifiers, if any */ 1785 bpp_ptr = strchr(name, '-'); 1786 if (bpp_ptr) 1787 bpp_off = bpp_ptr - name; 1788 1789 refresh_ptr = strchr(name, '@'); 1790 if (refresh_ptr) 1791 refresh_off = refresh_ptr - name; 1792 1793 /* Locate the start of named options */ 1794 options_ptr = strchr(name, ','); 1795 if (options_ptr) 1796 options_off = options_ptr - name; 1797 1798 /* Locate the end of the name / resolution, and parse it */ 1799 if (bpp_ptr) { 1800 mode_end = bpp_off; 1801 } else if (refresh_ptr) { 1802 mode_end = refresh_off; 1803 } else if (options_ptr) { 1804 mode_end = options_off; 1805 parse_extras = true; 1806 } else { 1807 mode_end = strlen(name); 1808 parse_extras = true; 1809 } 1810 1811 /* First check for a named mode */ 1812 for (i = 0; i < ARRAY_SIZE(drm_named_modes_whitelist); i++) { 1813 ret = str_has_prefix(name, drm_named_modes_whitelist[i]); 1814 if (ret == mode_end) { 1815 if (refresh_ptr) 1816 return false; /* named + refresh is invalid */ 1817 1818 strcpy(mode->name, drm_named_modes_whitelist[i]); 1819 mode->specified = true; 1820 break; 1821 } 1822 } 1823 1824 /* No named mode? Check for a normal mode argument, e.g. 1024x768 */ 1825 if (!mode->specified && isdigit(name[0])) { 1826 ret = drm_mode_parse_cmdline_res_mode(name, mode_end, 1827 parse_extras, 1828 connector, 1829 mode); 1830 if (ret) 1831 return false; 1832 1833 mode->specified = true; 1834 } 1835 1836 /* No mode? Check for freestanding extras and/or options */ 1837 if (!mode->specified) { 1838 unsigned int len = strlen(mode_option); 1839 1840 if (bpp_ptr || refresh_ptr) 1841 return false; /* syntax error */ 1842 1843 if (len == 1 || (len >= 2 && mode_option[1] == ',')) 1844 extra_ptr = mode_option; 1845 else 1846 options_ptr = mode_option - 1; 1847 1848 freestanding = true; 1849 } 1850 1851 if (bpp_ptr) { 1852 ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); 1853 if (ret) 1854 return false; 1855 1856 mode->bpp_specified = true; 1857 } 1858 1859 if (refresh_ptr) { 1860 ret = drm_mode_parse_cmdline_refresh(refresh_ptr, 1861 &refresh_end_ptr, mode); 1862 if (ret) 1863 return false; 1864 1865 mode->refresh_specified = true; 1866 } 1867 1868 /* 1869 * Locate the end of the bpp / refresh, and parse the extras 1870 * if relevant 1871 */ 1872 if (bpp_ptr && refresh_ptr) 1873 extra_ptr = max(bpp_end_ptr, refresh_end_ptr); 1874 else if (bpp_ptr) 1875 extra_ptr = bpp_end_ptr; 1876 else if (refresh_ptr) 1877 extra_ptr = refresh_end_ptr; 1878 1879 if (extra_ptr) { 1880 if (options_ptr) 1881 len = options_ptr - extra_ptr; 1882 else 1883 len = strlen(extra_ptr); 1884 1885 ret = drm_mode_parse_cmdline_extra(extra_ptr, len, freestanding, 1886 connector, mode); 1887 if (ret) 1888 return false; 1889 } 1890 1891 if (options_ptr) { 1892 ret = drm_mode_parse_cmdline_options(options_ptr + 1, 1893 freestanding, 1894 connector, mode); 1895 if (ret) 1896 return false; 1897 } 1898 1899 return true; 1900 } 1901 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1902 1903 /** 1904 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1905 * @dev: DRM device to create the new mode for 1906 * @cmd: input command line modeline 1907 * 1908 * Returns: 1909 * Pointer to converted mode on success, NULL on error. 1910 */ 1911 struct drm_display_mode * 1912 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 1913 struct drm_cmdline_mode *cmd) 1914 { 1915 struct drm_display_mode *mode; 1916 1917 if (cmd->cvt) 1918 mode = drm_cvt_mode(dev, 1919 cmd->xres, cmd->yres, 1920 cmd->refresh_specified ? cmd->refresh : 60, 1921 cmd->rb, cmd->interlace, 1922 cmd->margins); 1923 else 1924 mode = drm_gtf_mode(dev, 1925 cmd->xres, cmd->yres, 1926 cmd->refresh_specified ? cmd->refresh : 60, 1927 cmd->interlace, 1928 cmd->margins); 1929 if (!mode) 1930 return NULL; 1931 1932 mode->type |= DRM_MODE_TYPE_USERDEF; 1933 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ 1934 if (cmd->xres == 1366) 1935 drm_mode_fixup_1366x768(mode); 1936 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1937 return mode; 1938 } 1939 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 1940 1941 /** 1942 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1943 * @out: drm_mode_modeinfo struct to return to the user 1944 * @in: drm_display_mode to use 1945 * 1946 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1947 * the user. 1948 */ 1949 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 1950 const struct drm_display_mode *in) 1951 { 1952 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1953 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1954 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1955 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1956 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1957 "timing values too large for mode info\n"); 1958 1959 out->clock = in->clock; 1960 out->hdisplay = in->hdisplay; 1961 out->hsync_start = in->hsync_start; 1962 out->hsync_end = in->hsync_end; 1963 out->htotal = in->htotal; 1964 out->hskew = in->hskew; 1965 out->vdisplay = in->vdisplay; 1966 out->vsync_start = in->vsync_start; 1967 out->vsync_end = in->vsync_end; 1968 out->vtotal = in->vtotal; 1969 out->vscan = in->vscan; 1970 out->vrefresh = in->vrefresh; 1971 out->flags = in->flags; 1972 out->type = in->type; 1973 1974 switch (in->picture_aspect_ratio) { 1975 case HDMI_PICTURE_ASPECT_4_3: 1976 out->flags |= DRM_MODE_FLAG_PIC_AR_4_3; 1977 break; 1978 case HDMI_PICTURE_ASPECT_16_9: 1979 out->flags |= DRM_MODE_FLAG_PIC_AR_16_9; 1980 break; 1981 case HDMI_PICTURE_ASPECT_64_27: 1982 out->flags |= DRM_MODE_FLAG_PIC_AR_64_27; 1983 break; 1984 case HDMI_PICTURE_ASPECT_256_135: 1985 out->flags |= DRM_MODE_FLAG_PIC_AR_256_135; 1986 break; 1987 default: 1988 WARN(1, "Invalid aspect ratio (0%x) on mode\n", 1989 in->picture_aspect_ratio); 1990 /* fall through */ 1991 case HDMI_PICTURE_ASPECT_NONE: 1992 out->flags |= DRM_MODE_FLAG_PIC_AR_NONE; 1993 break; 1994 } 1995 1996 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1997 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1998 } 1999 2000 /** 2001 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 2002 * @dev: drm device 2003 * @out: drm_display_mode to return to the user 2004 * @in: drm_mode_modeinfo to use 2005 * 2006 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 2007 * the caller. 2008 * 2009 * Returns: 2010 * Zero on success, negative errno on failure. 2011 */ 2012 int drm_mode_convert_umode(struct drm_device *dev, 2013 struct drm_display_mode *out, 2014 const struct drm_mode_modeinfo *in) 2015 { 2016 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 2017 return -ERANGE; 2018 2019 out->clock = in->clock; 2020 out->hdisplay = in->hdisplay; 2021 out->hsync_start = in->hsync_start; 2022 out->hsync_end = in->hsync_end; 2023 out->htotal = in->htotal; 2024 out->hskew = in->hskew; 2025 out->vdisplay = in->vdisplay; 2026 out->vsync_start = in->vsync_start; 2027 out->vsync_end = in->vsync_end; 2028 out->vtotal = in->vtotal; 2029 out->vscan = in->vscan; 2030 out->vrefresh = in->vrefresh; 2031 out->flags = in->flags; 2032 /* 2033 * Old xf86-video-vmware (possibly others too) used to 2034 * leave 'type' unititialized. Just ignore any bits we 2035 * don't like. It's a just hint after all, and more 2036 * useful for the kernel->userspace direction anyway. 2037 */ 2038 out->type = in->type & DRM_MODE_TYPE_ALL; 2039 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 2040 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 2041 2042 /* Clearing picture aspect ratio bits from out flags, 2043 * as the aspect-ratio information is not stored in 2044 * flags for kernel-mode, but in picture_aspect_ratio. 2045 */ 2046 out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 2047 2048 switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) { 2049 case DRM_MODE_FLAG_PIC_AR_4_3: 2050 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3; 2051 break; 2052 case DRM_MODE_FLAG_PIC_AR_16_9: 2053 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9; 2054 break; 2055 case DRM_MODE_FLAG_PIC_AR_64_27: 2056 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27; 2057 break; 2058 case DRM_MODE_FLAG_PIC_AR_256_135: 2059 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135; 2060 break; 2061 case DRM_MODE_FLAG_PIC_AR_NONE: 2062 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE; 2063 break; 2064 default: 2065 return -EINVAL; 2066 } 2067 2068 out->status = drm_mode_validate_driver(dev, out); 2069 if (out->status != MODE_OK) 2070 return -EINVAL; 2071 2072 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 2073 2074 return 0; 2075 } 2076 2077 /** 2078 * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420 2079 * output format 2080 * 2081 * @display: display under action 2082 * @mode: video mode to be tested. 2083 * 2084 * Returns: 2085 * true if the mode can be supported in YCBCR420 format 2086 * false if not. 2087 */ 2088 bool drm_mode_is_420_only(const struct drm_display_info *display, 2089 const struct drm_display_mode *mode) 2090 { 2091 u8 vic = drm_match_cea_mode(mode); 2092 2093 return test_bit(vic, display->hdmi.y420_vdb_modes); 2094 } 2095 EXPORT_SYMBOL(drm_mode_is_420_only); 2096 2097 /** 2098 * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420 2099 * output format also (along with RGB/YCBCR444/422) 2100 * 2101 * @display: display under action. 2102 * @mode: video mode to be tested. 2103 * 2104 * Returns: 2105 * true if the mode can be support YCBCR420 format 2106 * false if not. 2107 */ 2108 bool drm_mode_is_420_also(const struct drm_display_info *display, 2109 const struct drm_display_mode *mode) 2110 { 2111 u8 vic = drm_match_cea_mode(mode); 2112 2113 return test_bit(vic, display->hdmi.y420_cmdb_modes); 2114 } 2115 EXPORT_SYMBOL(drm_mode_is_420_also); 2116 /** 2117 * drm_mode_is_420 - if a given videomode can be supported in YCBCR420 2118 * output format 2119 * 2120 * @display: display under action. 2121 * @mode: video mode to be tested. 2122 * 2123 * Returns: 2124 * true if the mode can be supported in YCBCR420 format 2125 * false if not. 2126 */ 2127 bool drm_mode_is_420(const struct drm_display_info *display, 2128 const struct drm_display_mode *mode) 2129 { 2130 return drm_mode_is_420_only(display, mode) || 2131 drm_mode_is_420_also(display, mode); 2132 } 2133 EXPORT_SYMBOL(drm_mode_is_420); 2134