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 #include <linux/fb.h> 38 39 #include <video/of_display_timing.h> 40 #include <video/of_videomode.h> 41 #include <video/videomode.h> 42 43 #include <drm/drm_crtc.h> 44 #include <drm/drm_device.h> 45 #include <drm/drm_edid.h> 46 #include <drm/drm_modes.h> 47 #include <drm/drm_print.h> 48 49 #include "drm_crtc_internal.h" 50 51 /** 52 * drm_mode_debug_printmodeline - print a mode to dmesg 53 * @mode: mode to print 54 * 55 * Describe @mode using DRM_DEBUG. 56 */ 57 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) 58 { 59 DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 60 } 61 EXPORT_SYMBOL(drm_mode_debug_printmodeline); 62 63 /** 64 * drm_mode_create - create a new display mode 65 * @dev: DRM device 66 * 67 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it 68 * and return it. 69 * 70 * Returns: 71 * Pointer to new mode on success, NULL on error. 72 */ 73 struct drm_display_mode *drm_mode_create(struct drm_device *dev) 74 { 75 struct drm_display_mode *nmode; 76 77 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); 78 if (!nmode) 79 return NULL; 80 81 return nmode; 82 } 83 EXPORT_SYMBOL(drm_mode_create); 84 85 /** 86 * drm_mode_destroy - remove a mode 87 * @dev: DRM device 88 * @mode: mode to remove 89 * 90 * Release @mode's unique ID, then free it @mode structure itself using kfree. 91 */ 92 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) 93 { 94 if (!mode) 95 return; 96 97 kfree(mode); 98 } 99 EXPORT_SYMBOL(drm_mode_destroy); 100 101 /** 102 * drm_mode_probed_add - add a mode to a connector's probed_mode list 103 * @connector: connector the new mode 104 * @mode: mode data 105 * 106 * Add @mode to @connector's probed_mode list for later use. This list should 107 * then in a second step get filtered and all the modes actually supported by 108 * the hardware moved to the @connector's modes list. 109 */ 110 void drm_mode_probed_add(struct drm_connector *connector, 111 struct drm_display_mode *mode) 112 { 113 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 114 115 list_add_tail(&mode->head, &connector->probed_modes); 116 } 117 EXPORT_SYMBOL(drm_mode_probed_add); 118 119 /** 120 * drm_cvt_mode -create a modeline based on the CVT algorithm 121 * @dev: drm device 122 * @hdisplay: hdisplay size 123 * @vdisplay: vdisplay size 124 * @vrefresh: vrefresh rate 125 * @reduced: whether to use reduced blanking 126 * @interlaced: whether to compute an interlaced mode 127 * @margins: whether to add margins (borders) 128 * 129 * This function is called to generate the modeline based on CVT algorithm 130 * according to the hdisplay, vdisplay, vrefresh. 131 * It is based from the VESA(TM) Coordinated Video Timing Generator by 132 * Graham Loveridge April 9, 2003 available at 133 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls 134 * 135 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. 136 * What I have done is to translate it by using integer calculation. 137 * 138 * Returns: 139 * The modeline based on the CVT algorithm stored in a drm_display_mode object. 140 * The display mode object is allocated with drm_mode_create(). Returns NULL 141 * when no mode could be allocated. 142 */ 143 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 144 int vdisplay, int vrefresh, 145 bool reduced, bool interlaced, bool margins) 146 { 147 #define HV_FACTOR 1000 148 /* 1) top/bottom margin size (% of height) - default: 1.8, */ 149 #define CVT_MARGIN_PERCENTAGE 18 150 /* 2) character cell horizontal granularity (pixels) - default 8 */ 151 #define CVT_H_GRANULARITY 8 152 /* 3) Minimum vertical porch (lines) - default 3 */ 153 #define CVT_MIN_V_PORCH 3 154 /* 4) Minimum number of vertical back porch lines - default 6 */ 155 #define CVT_MIN_V_BPORCH 6 156 /* Pixel Clock step (kHz) */ 157 #define CVT_CLOCK_STEP 250 158 struct drm_display_mode *drm_mode; 159 unsigned int vfieldrate, hperiod; 160 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; 161 int interlace; 162 u64 tmp; 163 164 if (!hdisplay || !vdisplay) 165 return NULL; 166 167 /* allocate the drm_display_mode structure. If failure, we will 168 * return directly 169 */ 170 drm_mode = drm_mode_create(dev); 171 if (!drm_mode) 172 return NULL; 173 174 /* the CVT default refresh rate is 60Hz */ 175 if (!vrefresh) 176 vrefresh = 60; 177 178 /* the required field fresh rate */ 179 if (interlaced) 180 vfieldrate = vrefresh * 2; 181 else 182 vfieldrate = vrefresh; 183 184 /* horizontal pixels */ 185 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); 186 187 /* determine the left&right borders */ 188 hmargin = 0; 189 if (margins) { 190 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 191 hmargin -= hmargin % CVT_H_GRANULARITY; 192 } 193 /* find the total active pixels */ 194 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; 195 196 /* find the number of lines per field */ 197 if (interlaced) 198 vdisplay_rnd = vdisplay / 2; 199 else 200 vdisplay_rnd = vdisplay; 201 202 /* find the top & bottom borders */ 203 vmargin = 0; 204 if (margins) 205 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; 206 207 drm_mode->vdisplay = vdisplay + 2 * vmargin; 208 209 /* Interlaced */ 210 if (interlaced) 211 interlace = 1; 212 else 213 interlace = 0; 214 215 /* Determine VSync Width from aspect ratio */ 216 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) 217 vsync = 4; 218 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) 219 vsync = 5; 220 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) 221 vsync = 6; 222 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) 223 vsync = 7; 224 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) 225 vsync = 7; 226 else /* custom */ 227 vsync = 10; 228 229 if (!reduced) { 230 /* simplify the GTF calculation */ 231 /* 4) Minimum time of vertical sync + back porch interval (µs) 232 * default 550.0 233 */ 234 int tmp1, tmp2; 235 #define CVT_MIN_VSYNC_BP 550 236 /* 3) Nominal HSync width (% of line period) - default 8 */ 237 #define CVT_HSYNC_PERCENTAGE 8 238 unsigned int hblank_percentage; 239 int vsyncandback_porch, __maybe_unused vback_porch, hblank; 240 241 /* estimated the horizontal period */ 242 tmp1 = HV_FACTOR * 1000000 - 243 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; 244 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + 245 interlace; 246 hperiod = tmp1 * 2 / (tmp2 * vfieldrate); 247 248 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; 249 /* 9. Find number of lines in sync + backporch */ 250 if (tmp1 < (vsync + CVT_MIN_V_PORCH)) 251 vsyncandback_porch = vsync + CVT_MIN_V_PORCH; 252 else 253 vsyncandback_porch = tmp1; 254 /* 10. Find number of lines in back porch */ 255 vback_porch = vsyncandback_porch - vsync; 256 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + 257 vsyncandback_porch + CVT_MIN_V_PORCH; 258 /* 5) Definition of Horizontal blanking time limitation */ 259 /* Gradient (%/kHz) - default 600 */ 260 #define CVT_M_FACTOR 600 261 /* Offset (%) - default 40 */ 262 #define CVT_C_FACTOR 40 263 /* Blanking time scaling factor - default 128 */ 264 #define CVT_K_FACTOR 128 265 /* Scaling factor weighting - default 20 */ 266 #define CVT_J_FACTOR 20 267 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) 268 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ 269 CVT_J_FACTOR) 270 /* 12. Find ideal blanking duty cycle from formula */ 271 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * 272 hperiod / 1000; 273 /* 13. Blanking time */ 274 if (hblank_percentage < 20 * HV_FACTOR) 275 hblank_percentage = 20 * HV_FACTOR; 276 hblank = drm_mode->hdisplay * hblank_percentage / 277 (100 * HV_FACTOR - hblank_percentage); 278 hblank -= hblank % (2 * CVT_H_GRANULARITY); 279 /* 14. find the total pixels per line */ 280 drm_mode->htotal = drm_mode->hdisplay + hblank; 281 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; 282 drm_mode->hsync_start = drm_mode->hsync_end - 283 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; 284 drm_mode->hsync_start += CVT_H_GRANULARITY - 285 drm_mode->hsync_start % CVT_H_GRANULARITY; 286 /* fill the Vsync values */ 287 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; 288 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 289 } else { 290 /* Reduced blanking */ 291 /* Minimum vertical blanking interval time (µs)- default 460 */ 292 #define CVT_RB_MIN_VBLANK 460 293 /* Fixed number of clocks for horizontal sync */ 294 #define CVT_RB_H_SYNC 32 295 /* Fixed number of clocks for horizontal blanking */ 296 #define CVT_RB_H_BLANK 160 297 /* Fixed number of lines for vertical front porch - default 3*/ 298 #define CVT_RB_VFPORCH 3 299 int vbilines; 300 int tmp1, tmp2; 301 /* 8. Estimate Horizontal period. */ 302 tmp1 = HV_FACTOR * 1000000 - 303 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; 304 tmp2 = vdisplay_rnd + 2 * vmargin; 305 hperiod = tmp1 / (tmp2 * vfieldrate); 306 /* 9. Find number of lines in vertical blanking */ 307 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; 308 /* 10. Check if vertical blanking is sufficient */ 309 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) 310 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; 311 /* 11. Find total number of lines in vertical field */ 312 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; 313 /* 12. Find total number of pixels in a line */ 314 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; 315 /* Fill in HSync values */ 316 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; 317 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; 318 /* Fill in VSync values */ 319 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; 320 drm_mode->vsync_end = drm_mode->vsync_start + vsync; 321 } 322 /* 15/13. Find pixel clock frequency (kHz for xf86) */ 323 tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */ 324 tmp *= HV_FACTOR * 1000; 325 do_div(tmp, hperiod); 326 tmp -= drm_mode->clock % CVT_CLOCK_STEP; 327 drm_mode->clock = tmp; 328 /* 18/16. Find actual vertical frame frequency */ 329 /* ignore - just set the mode flag for interlaced */ 330 if (interlaced) { 331 drm_mode->vtotal *= 2; 332 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 333 } 334 /* Fill the mode line name */ 335 drm_mode_set_name(drm_mode); 336 if (reduced) 337 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | 338 DRM_MODE_FLAG_NVSYNC); 339 else 340 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | 341 DRM_MODE_FLAG_NHSYNC); 342 343 return drm_mode; 344 } 345 EXPORT_SYMBOL(drm_cvt_mode); 346 347 /** 348 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm 349 * @dev: drm device 350 * @hdisplay: hdisplay size 351 * @vdisplay: vdisplay size 352 * @vrefresh: vrefresh rate. 353 * @interlaced: whether to compute an interlaced mode 354 * @margins: desired margin (borders) size 355 * @GTF_M: extended GTF formula parameters 356 * @GTF_2C: extended GTF formula parameters 357 * @GTF_K: extended GTF formula parameters 358 * @GTF_2J: extended GTF formula parameters 359 * 360 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them 361 * in here multiplied by two. For a C of 40, pass in 80. 362 * 363 * Returns: 364 * The modeline based on the full GTF algorithm stored in a drm_display_mode object. 365 * The display mode object is allocated with drm_mode_create(). Returns NULL 366 * when no mode could be allocated. 367 */ 368 struct drm_display_mode * 369 drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, 370 int vrefresh, bool interlaced, int margins, 371 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) 372 { /* 1) top/bottom margin size (% of height) - default: 1.8, */ 373 #define GTF_MARGIN_PERCENTAGE 18 374 /* 2) character cell horizontal granularity (pixels) - default 8 */ 375 #define GTF_CELL_GRAN 8 376 /* 3) Minimum vertical porch (lines) - default 3 */ 377 #define GTF_MIN_V_PORCH 1 378 /* width of vsync in lines */ 379 #define V_SYNC_RQD 3 380 /* width of hsync as % of total line */ 381 #define H_SYNC_PERCENT 8 382 /* min time of vsync + back porch (microsec) */ 383 #define MIN_VSYNC_PLUS_BP 550 384 /* C' and M' are part of the Blanking Duty Cycle computation */ 385 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) 386 #define GTF_M_PRIME (GTF_K * GTF_M / 256) 387 struct drm_display_mode *drm_mode; 388 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; 389 int top_margin, bottom_margin; 390 int interlace; 391 unsigned int hfreq_est; 392 int vsync_plus_bp, __maybe_unused vback_porch; 393 unsigned int vtotal_lines, __maybe_unused vfieldrate_est; 394 unsigned int __maybe_unused hperiod; 395 unsigned int vfield_rate, __maybe_unused vframe_rate; 396 int left_margin, right_margin; 397 unsigned int total_active_pixels, ideal_duty_cycle; 398 unsigned int hblank, total_pixels, pixel_freq; 399 int hsync, hfront_porch, vodd_front_porch_lines; 400 unsigned int tmp1, tmp2; 401 402 if (!hdisplay || !vdisplay) 403 return NULL; 404 405 drm_mode = drm_mode_create(dev); 406 if (!drm_mode) 407 return NULL; 408 409 /* 1. In order to give correct results, the number of horizontal 410 * pixels requested is first processed to ensure that it is divisible 411 * by the character size, by rounding it to the nearest character 412 * cell boundary: 413 */ 414 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 415 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; 416 417 /* 2. If interlace is requested, the number of vertical lines assumed 418 * by the calculation must be halved, as the computation calculates 419 * the number of vertical lines per field. 420 */ 421 if (interlaced) 422 vdisplay_rnd = vdisplay / 2; 423 else 424 vdisplay_rnd = vdisplay; 425 426 /* 3. Find the frame rate required: */ 427 if (interlaced) 428 vfieldrate_rqd = vrefresh * 2; 429 else 430 vfieldrate_rqd = vrefresh; 431 432 /* 4. Find number of lines in Top margin: */ 433 top_margin = 0; 434 if (margins) 435 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 436 1000; 437 /* 5. Find number of lines in bottom margin: */ 438 bottom_margin = top_margin; 439 440 /* 6. If interlace is required, then set variable interlace: */ 441 if (interlaced) 442 interlace = 1; 443 else 444 interlace = 0; 445 446 /* 7. Estimate the Horizontal frequency */ 447 { 448 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; 449 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * 450 2 + interlace; 451 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; 452 } 453 454 /* 8. Find the number of lines in V sync + back porch */ 455 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ 456 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; 457 vsync_plus_bp = (vsync_plus_bp + 500) / 1000; 458 /* 9. Find the number of lines in V back porch alone: */ 459 vback_porch = vsync_plus_bp - V_SYNC_RQD; 460 /* 10. Find the total number of lines in Vertical field period: */ 461 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + 462 vsync_plus_bp + GTF_MIN_V_PORCH; 463 /* 11. Estimate the Vertical field frequency: */ 464 vfieldrate_est = hfreq_est / vtotal_lines; 465 /* 12. Find the actual horizontal period: */ 466 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); 467 468 /* 13. Find the actual Vertical field frequency: */ 469 vfield_rate = hfreq_est / vtotal_lines; 470 /* 14. Find the Vertical frame frequency: */ 471 if (interlaced) 472 vframe_rate = vfield_rate / 2; 473 else 474 vframe_rate = vfield_rate; 475 /* 15. Find number of pixels in left margin: */ 476 if (margins) 477 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / 478 1000; 479 else 480 left_margin = 0; 481 482 /* 16.Find number of pixels in right margin: */ 483 right_margin = left_margin; 484 /* 17.Find total number of active pixels in image and left and right */ 485 total_active_pixels = hdisplay_rnd + left_margin + right_margin; 486 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ 487 ideal_duty_cycle = GTF_C_PRIME * 1000 - 488 (GTF_M_PRIME * 1000000 / hfreq_est); 489 /* 19.Find the number of pixels in the blanking time to the nearest 490 * double character cell: */ 491 hblank = total_active_pixels * ideal_duty_cycle / 492 (100000 - ideal_duty_cycle); 493 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); 494 hblank = hblank * 2 * GTF_CELL_GRAN; 495 /* 20.Find total number of pixels: */ 496 total_pixels = total_active_pixels + hblank; 497 /* 21.Find pixel clock frequency: */ 498 pixel_freq = total_pixels * hfreq_est / 1000; 499 /* Stage 1 computations are now complete; I should really pass 500 * the results to another function and do the Stage 2 computations, 501 * but I only need a few more values so I'll just append the 502 * computations here for now */ 503 /* 17. Find the number of pixels in the horizontal sync period: */ 504 hsync = H_SYNC_PERCENT * total_pixels / 100; 505 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; 506 hsync = hsync * GTF_CELL_GRAN; 507 /* 18. Find the number of pixels in horizontal front porch period */ 508 hfront_porch = hblank / 2 - hsync; 509 /* 36. Find the number of lines in the odd front porch period: */ 510 vodd_front_porch_lines = GTF_MIN_V_PORCH ; 511 512 /* finally, pack the results in the mode struct */ 513 drm_mode->hdisplay = hdisplay_rnd; 514 drm_mode->hsync_start = hdisplay_rnd + hfront_porch; 515 drm_mode->hsync_end = drm_mode->hsync_start + hsync; 516 drm_mode->htotal = total_pixels; 517 drm_mode->vdisplay = vdisplay_rnd; 518 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; 519 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; 520 drm_mode->vtotal = vtotal_lines; 521 522 drm_mode->clock = pixel_freq; 523 524 if (interlaced) { 525 drm_mode->vtotal *= 2; 526 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; 527 } 528 529 drm_mode_set_name(drm_mode); 530 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) 531 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; 532 else 533 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; 534 535 return drm_mode; 536 } 537 EXPORT_SYMBOL(drm_gtf_mode_complex); 538 539 /** 540 * drm_gtf_mode - create the modeline based on the GTF algorithm 541 * @dev: drm device 542 * @hdisplay: hdisplay size 543 * @vdisplay: vdisplay size 544 * @vrefresh: vrefresh rate. 545 * @interlaced: whether to compute an interlaced mode 546 * @margins: desired margin (borders) size 547 * 548 * return the modeline based on GTF algorithm 549 * 550 * This function is to create the modeline based on the GTF algorithm. 551 * Generalized Timing Formula is derived from: 552 * 553 * GTF Spreadsheet by Andy Morrish (1/5/97) 554 * available at https://www.vesa.org 555 * 556 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. 557 * What I have done is to translate it by using integer calculation. 558 * I also refer to the function of fb_get_mode in the file of 559 * drivers/video/fbmon.c 560 * 561 * Standard GTF parameters:: 562 * 563 * M = 600 564 * C = 40 565 * K = 128 566 * J = 20 567 * 568 * Returns: 569 * The modeline based on the GTF algorithm stored in a drm_display_mode object. 570 * The display mode object is allocated with drm_mode_create(). Returns NULL 571 * when no mode could be allocated. 572 */ 573 struct drm_display_mode * 574 drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, 575 bool interlaced, int margins) 576 { 577 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, 578 interlaced, margins, 579 600, 40 * 2, 128, 20 * 2); 580 } 581 EXPORT_SYMBOL(drm_gtf_mode); 582 583 #ifdef CONFIG_VIDEOMODE_HELPERS 584 /** 585 * drm_display_mode_from_videomode - fill in @dmode using @vm, 586 * @vm: videomode structure to use as source 587 * @dmode: drm_display_mode structure to use as destination 588 * 589 * Fills out @dmode using the display mode specified in @vm. 590 */ 591 void drm_display_mode_from_videomode(const struct videomode *vm, 592 struct drm_display_mode *dmode) 593 { 594 dmode->hdisplay = vm->hactive; 595 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; 596 dmode->hsync_end = dmode->hsync_start + vm->hsync_len; 597 dmode->htotal = dmode->hsync_end + vm->hback_porch; 598 599 dmode->vdisplay = vm->vactive; 600 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; 601 dmode->vsync_end = dmode->vsync_start + vm->vsync_len; 602 dmode->vtotal = dmode->vsync_end + vm->vback_porch; 603 604 dmode->clock = vm->pixelclock / 1000; 605 606 dmode->flags = 0; 607 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) 608 dmode->flags |= DRM_MODE_FLAG_PHSYNC; 609 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) 610 dmode->flags |= DRM_MODE_FLAG_NHSYNC; 611 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) 612 dmode->flags |= DRM_MODE_FLAG_PVSYNC; 613 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) 614 dmode->flags |= DRM_MODE_FLAG_NVSYNC; 615 if (vm->flags & DISPLAY_FLAGS_INTERLACED) 616 dmode->flags |= DRM_MODE_FLAG_INTERLACE; 617 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) 618 dmode->flags |= DRM_MODE_FLAG_DBLSCAN; 619 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) 620 dmode->flags |= DRM_MODE_FLAG_DBLCLK; 621 drm_mode_set_name(dmode); 622 } 623 EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); 624 625 /** 626 * drm_display_mode_to_videomode - fill in @vm using @dmode, 627 * @dmode: drm_display_mode structure to use as source 628 * @vm: videomode structure to use as destination 629 * 630 * Fills out @vm using the display mode specified in @dmode. 631 */ 632 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 633 struct videomode *vm) 634 { 635 vm->hactive = dmode->hdisplay; 636 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay; 637 vm->hsync_len = dmode->hsync_end - dmode->hsync_start; 638 vm->hback_porch = dmode->htotal - dmode->hsync_end; 639 640 vm->vactive = dmode->vdisplay; 641 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay; 642 vm->vsync_len = dmode->vsync_end - dmode->vsync_start; 643 vm->vback_porch = dmode->vtotal - dmode->vsync_end; 644 645 vm->pixelclock = dmode->clock * 1000; 646 647 vm->flags = 0; 648 if (dmode->flags & DRM_MODE_FLAG_PHSYNC) 649 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; 650 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC) 651 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; 652 if (dmode->flags & DRM_MODE_FLAG_PVSYNC) 653 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; 654 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC) 655 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; 656 if (dmode->flags & DRM_MODE_FLAG_INTERLACE) 657 vm->flags |= DISPLAY_FLAGS_INTERLACED; 658 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN) 659 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN; 660 if (dmode->flags & DRM_MODE_FLAG_DBLCLK) 661 vm->flags |= DISPLAY_FLAGS_DOUBLECLK; 662 } 663 EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); 664 665 /** 666 * drm_bus_flags_from_videomode - extract information about pixelclk and 667 * DE polarity from videomode and store it in a separate variable 668 * @vm: videomode structure to use 669 * @bus_flags: information about pixelclk, sync and DE polarity will be stored 670 * here 671 * 672 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH), DRM_BUS_FLAG_PIXDATA_DRIVE_(POS|NEG)EDGE 673 * and DISPLAY_FLAGS_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS 674 * found in @vm 675 */ 676 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) 677 { 678 *bus_flags = 0; 679 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) 680 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE; 681 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) 682 *bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE; 683 684 if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE) 685 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE; 686 if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE) 687 *bus_flags |= DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE; 688 689 if (vm->flags & DISPLAY_FLAGS_DE_LOW) 690 *bus_flags |= DRM_BUS_FLAG_DE_LOW; 691 if (vm->flags & DISPLAY_FLAGS_DE_HIGH) 692 *bus_flags |= DRM_BUS_FLAG_DE_HIGH; 693 } 694 EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode); 695 696 #ifdef CONFIG_OF 697 /** 698 * of_get_drm_display_mode - get a drm_display_mode from devicetree 699 * @np: device_node with the timing specification 700 * @dmode: will be set to the return value 701 * @bus_flags: information about pixelclk, sync and DE polarity 702 * @index: index into the list of display timings in devicetree 703 * 704 * This function is expensive and should only be used, if only one mode is to be 705 * read from DT. To get multiple modes start with of_get_display_timings and 706 * work with that instead. 707 * 708 * Returns: 709 * 0 on success, a negative errno code when no of videomode node was found. 710 */ 711 int of_get_drm_display_mode(struct device_node *np, 712 struct drm_display_mode *dmode, u32 *bus_flags, 713 int index) 714 { 715 struct videomode vm; 716 int ret; 717 718 ret = of_get_videomode(np, &vm, index); 719 if (ret) 720 return ret; 721 722 drm_display_mode_from_videomode(&vm, dmode); 723 if (bus_flags) 724 drm_bus_flags_from_videomode(&vm, bus_flags); 725 726 pr_debug("%pOF: got %dx%d display mode\n", 727 np, vm.hactive, vm.vactive); 728 drm_mode_debug_printmodeline(dmode); 729 730 return 0; 731 } 732 EXPORT_SYMBOL_GPL(of_get_drm_display_mode); 733 734 /** 735 * of_get_drm_panel_display_mode - get a panel-timing drm_display_mode from devicetree 736 * @np: device_node with the panel-timing specification 737 * @dmode: will be set to the return value 738 * @bus_flags: information about pixelclk, sync and DE polarity 739 * 740 * The mandatory Device Tree properties width-mm and height-mm 741 * are read and set on the display mode. 742 * 743 * Returns: 744 * Zero on success, negative error code on failure. 745 */ 746 int of_get_drm_panel_display_mode(struct device_node *np, 747 struct drm_display_mode *dmode, u32 *bus_flags) 748 { 749 u32 width_mm = 0, height_mm = 0; 750 struct display_timing timing; 751 struct videomode vm; 752 int ret; 753 754 ret = of_get_display_timing(np, "panel-timing", &timing); 755 if (ret) 756 return ret; 757 758 videomode_from_timing(&timing, &vm); 759 760 memset(dmode, 0, sizeof(*dmode)); 761 drm_display_mode_from_videomode(&vm, dmode); 762 if (bus_flags) 763 drm_bus_flags_from_videomode(&vm, bus_flags); 764 765 ret = of_property_read_u32(np, "width-mm", &width_mm); 766 if (ret) 767 return ret; 768 769 ret = of_property_read_u32(np, "height-mm", &height_mm); 770 if (ret) 771 return ret; 772 773 dmode->width_mm = width_mm; 774 dmode->height_mm = height_mm; 775 776 drm_mode_debug_printmodeline(dmode); 777 778 return 0; 779 } 780 EXPORT_SYMBOL_GPL(of_get_drm_panel_display_mode); 781 #endif /* CONFIG_OF */ 782 #endif /* CONFIG_VIDEOMODE_HELPERS */ 783 784 /** 785 * drm_mode_set_name - set the name on a mode 786 * @mode: name will be set in this mode 787 * 788 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> 789 * with an optional 'i' suffix for interlaced modes. 790 */ 791 void drm_mode_set_name(struct drm_display_mode *mode) 792 { 793 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 794 795 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", 796 mode->hdisplay, mode->vdisplay, 797 interlaced ? "i" : ""); 798 } 799 EXPORT_SYMBOL(drm_mode_set_name); 800 801 /** 802 * drm_mode_vrefresh - get the vrefresh of a mode 803 * @mode: mode 804 * 805 * Returns: 806 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the 807 * value first if it is not yet set. 808 */ 809 int drm_mode_vrefresh(const struct drm_display_mode *mode) 810 { 811 unsigned int num, den; 812 813 if (mode->htotal == 0 || mode->vtotal == 0) 814 return 0; 815 816 num = mode->clock; 817 den = mode->htotal * mode->vtotal; 818 819 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 820 num *= 2; 821 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 822 den *= 2; 823 if (mode->vscan > 1) 824 den *= mode->vscan; 825 826 return DIV_ROUND_CLOSEST_ULL(mul_u32_u32(num, 1000), den); 827 } 828 EXPORT_SYMBOL(drm_mode_vrefresh); 829 830 /** 831 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode 832 * @mode: mode to query 833 * @hdisplay: hdisplay value to fill in 834 * @vdisplay: vdisplay value to fill in 835 * 836 * The vdisplay value will be doubled if the specified mode is a stereo mode of 837 * the appropriate layout. 838 */ 839 void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 840 int *hdisplay, int *vdisplay) 841 { 842 struct drm_display_mode adjusted; 843 844 drm_mode_init(&adjusted, mode); 845 846 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 847 *hdisplay = adjusted.crtc_hdisplay; 848 *vdisplay = adjusted.crtc_vdisplay; 849 } 850 EXPORT_SYMBOL(drm_mode_get_hv_timing); 851 852 /** 853 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters 854 * @p: mode 855 * @adjust_flags: a combination of adjustment flags 856 * 857 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. 858 * 859 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of 860 * interlaced modes. 861 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for 862 * buffers containing two eyes (only adjust the timings when needed, eg. for 863 * "frame packing" or "side by side full"). 864 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not* 865 * be performed for doublescan and vscan > 1 modes respectively. 866 */ 867 void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) 868 { 869 if (!p) 870 return; 871 872 p->crtc_clock = p->clock; 873 p->crtc_hdisplay = p->hdisplay; 874 p->crtc_hsync_start = p->hsync_start; 875 p->crtc_hsync_end = p->hsync_end; 876 p->crtc_htotal = p->htotal; 877 p->crtc_hskew = p->hskew; 878 p->crtc_vdisplay = p->vdisplay; 879 p->crtc_vsync_start = p->vsync_start; 880 p->crtc_vsync_end = p->vsync_end; 881 p->crtc_vtotal = p->vtotal; 882 883 if (p->flags & DRM_MODE_FLAG_INTERLACE) { 884 if (adjust_flags & CRTC_INTERLACE_HALVE_V) { 885 p->crtc_vdisplay /= 2; 886 p->crtc_vsync_start /= 2; 887 p->crtc_vsync_end /= 2; 888 p->crtc_vtotal /= 2; 889 } 890 } 891 892 if (!(adjust_flags & CRTC_NO_DBLSCAN)) { 893 if (p->flags & DRM_MODE_FLAG_DBLSCAN) { 894 p->crtc_vdisplay *= 2; 895 p->crtc_vsync_start *= 2; 896 p->crtc_vsync_end *= 2; 897 p->crtc_vtotal *= 2; 898 } 899 } 900 901 if (!(adjust_flags & CRTC_NO_VSCAN)) { 902 if (p->vscan > 1) { 903 p->crtc_vdisplay *= p->vscan; 904 p->crtc_vsync_start *= p->vscan; 905 p->crtc_vsync_end *= p->vscan; 906 p->crtc_vtotal *= p->vscan; 907 } 908 } 909 910 if (adjust_flags & CRTC_STEREO_DOUBLE) { 911 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; 912 913 switch (layout) { 914 case DRM_MODE_FLAG_3D_FRAME_PACKING: 915 p->crtc_clock *= 2; 916 p->crtc_vdisplay += p->crtc_vtotal; 917 p->crtc_vsync_start += p->crtc_vtotal; 918 p->crtc_vsync_end += p->crtc_vtotal; 919 p->crtc_vtotal += p->crtc_vtotal; 920 break; 921 } 922 } 923 924 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); 925 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); 926 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); 927 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); 928 } 929 EXPORT_SYMBOL(drm_mode_set_crtcinfo); 930 931 /** 932 * drm_mode_copy - copy the mode 933 * @dst: mode to overwrite 934 * @src: mode to copy 935 * 936 * Copy an existing mode into another mode, preserving the 937 * list head of the destination mode. 938 */ 939 void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) 940 { 941 struct list_head head = dst->head; 942 943 *dst = *src; 944 dst->head = head; 945 } 946 EXPORT_SYMBOL(drm_mode_copy); 947 948 /** 949 * drm_mode_init - initialize the mode from another mode 950 * @dst: mode to overwrite 951 * @src: mode to copy 952 * 953 * Copy an existing mode into another mode, zeroing the 954 * list head of the destination mode. Typically used 955 * to guarantee the list head is not left with stack 956 * garbage in on-stack modes. 957 */ 958 void drm_mode_init(struct drm_display_mode *dst, const struct drm_display_mode *src) 959 { 960 memset(dst, 0, sizeof(*dst)); 961 drm_mode_copy(dst, src); 962 } 963 EXPORT_SYMBOL(drm_mode_init); 964 965 /** 966 * drm_mode_duplicate - allocate and duplicate an existing mode 967 * @dev: drm_device to allocate the duplicated mode for 968 * @mode: mode to duplicate 969 * 970 * Just allocate a new mode, copy the existing mode into it, and return 971 * a pointer to it. Used to create new instances of established modes. 972 * 973 * Returns: 974 * Pointer to duplicated mode on success, NULL on error. 975 */ 976 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 977 const struct drm_display_mode *mode) 978 { 979 struct drm_display_mode *nmode; 980 981 nmode = drm_mode_create(dev); 982 if (!nmode) 983 return NULL; 984 985 drm_mode_copy(nmode, mode); 986 987 return nmode; 988 } 989 EXPORT_SYMBOL(drm_mode_duplicate); 990 991 static bool drm_mode_match_timings(const struct drm_display_mode *mode1, 992 const struct drm_display_mode *mode2) 993 { 994 return mode1->hdisplay == mode2->hdisplay && 995 mode1->hsync_start == mode2->hsync_start && 996 mode1->hsync_end == mode2->hsync_end && 997 mode1->htotal == mode2->htotal && 998 mode1->hskew == mode2->hskew && 999 mode1->vdisplay == mode2->vdisplay && 1000 mode1->vsync_start == mode2->vsync_start && 1001 mode1->vsync_end == mode2->vsync_end && 1002 mode1->vtotal == mode2->vtotal && 1003 mode1->vscan == mode2->vscan; 1004 } 1005 1006 static bool drm_mode_match_clock(const struct drm_display_mode *mode1, 1007 const struct drm_display_mode *mode2) 1008 { 1009 /* 1010 * do clock check convert to PICOS 1011 * so fb modes get matched the same 1012 */ 1013 if (mode1->clock && mode2->clock) 1014 return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock); 1015 else 1016 return mode1->clock == mode2->clock; 1017 } 1018 1019 static bool drm_mode_match_flags(const struct drm_display_mode *mode1, 1020 const struct drm_display_mode *mode2) 1021 { 1022 return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == 1023 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK); 1024 } 1025 1026 static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1, 1027 const struct drm_display_mode *mode2) 1028 { 1029 return (mode1->flags & DRM_MODE_FLAG_3D_MASK) == 1030 (mode2->flags & DRM_MODE_FLAG_3D_MASK); 1031 } 1032 1033 static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1, 1034 const struct drm_display_mode *mode2) 1035 { 1036 return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio; 1037 } 1038 1039 /** 1040 * drm_mode_match - test modes for (partial) equality 1041 * @mode1: first mode 1042 * @mode2: second mode 1043 * @match_flags: which parts need to match (DRM_MODE_MATCH_*) 1044 * 1045 * Check to see if @mode1 and @mode2 are equivalent. 1046 * 1047 * Returns: 1048 * True if the modes are (partially) equal, false otherwise. 1049 */ 1050 bool drm_mode_match(const struct drm_display_mode *mode1, 1051 const struct drm_display_mode *mode2, 1052 unsigned int match_flags) 1053 { 1054 if (!mode1 && !mode2) 1055 return true; 1056 1057 if (!mode1 || !mode2) 1058 return false; 1059 1060 if (match_flags & DRM_MODE_MATCH_TIMINGS && 1061 !drm_mode_match_timings(mode1, mode2)) 1062 return false; 1063 1064 if (match_flags & DRM_MODE_MATCH_CLOCK && 1065 !drm_mode_match_clock(mode1, mode2)) 1066 return false; 1067 1068 if (match_flags & DRM_MODE_MATCH_FLAGS && 1069 !drm_mode_match_flags(mode1, mode2)) 1070 return false; 1071 1072 if (match_flags & DRM_MODE_MATCH_3D_FLAGS && 1073 !drm_mode_match_3d_flags(mode1, mode2)) 1074 return false; 1075 1076 if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO && 1077 !drm_mode_match_aspect_ratio(mode1, mode2)) 1078 return false; 1079 1080 return true; 1081 } 1082 EXPORT_SYMBOL(drm_mode_match); 1083 1084 /** 1085 * drm_mode_equal - test modes for equality 1086 * @mode1: first mode 1087 * @mode2: second mode 1088 * 1089 * Check to see if @mode1 and @mode2 are equivalent. 1090 * 1091 * Returns: 1092 * True if the modes are equal, false otherwise. 1093 */ 1094 bool drm_mode_equal(const struct drm_display_mode *mode1, 1095 const struct drm_display_mode *mode2) 1096 { 1097 return drm_mode_match(mode1, mode2, 1098 DRM_MODE_MATCH_TIMINGS | 1099 DRM_MODE_MATCH_CLOCK | 1100 DRM_MODE_MATCH_FLAGS | 1101 DRM_MODE_MATCH_3D_FLAGS| 1102 DRM_MODE_MATCH_ASPECT_RATIO); 1103 } 1104 EXPORT_SYMBOL(drm_mode_equal); 1105 1106 /** 1107 * drm_mode_equal_no_clocks - test modes for equality 1108 * @mode1: first mode 1109 * @mode2: second mode 1110 * 1111 * Check to see if @mode1 and @mode2 are equivalent, but 1112 * don't check the pixel clocks. 1113 * 1114 * Returns: 1115 * True if the modes are equal, false otherwise. 1116 */ 1117 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, 1118 const struct drm_display_mode *mode2) 1119 { 1120 return drm_mode_match(mode1, mode2, 1121 DRM_MODE_MATCH_TIMINGS | 1122 DRM_MODE_MATCH_FLAGS | 1123 DRM_MODE_MATCH_3D_FLAGS); 1124 } 1125 EXPORT_SYMBOL(drm_mode_equal_no_clocks); 1126 1127 /** 1128 * drm_mode_equal_no_clocks_no_stereo - test modes for equality 1129 * @mode1: first mode 1130 * @mode2: second mode 1131 * 1132 * Check to see if @mode1 and @mode2 are equivalent, but 1133 * don't check the pixel clocks nor the stereo layout. 1134 * 1135 * Returns: 1136 * True if the modes are equal, false otherwise. 1137 */ 1138 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 1139 const struct drm_display_mode *mode2) 1140 { 1141 return drm_mode_match(mode1, mode2, 1142 DRM_MODE_MATCH_TIMINGS | 1143 DRM_MODE_MATCH_FLAGS); 1144 } 1145 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); 1146 1147 static enum drm_mode_status 1148 drm_mode_validate_basic(const struct drm_display_mode *mode) 1149 { 1150 if (mode->type & ~DRM_MODE_TYPE_ALL) 1151 return MODE_BAD; 1152 1153 if (mode->flags & ~DRM_MODE_FLAG_ALL) 1154 return MODE_BAD; 1155 1156 if ((mode->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1157 return MODE_BAD; 1158 1159 if (mode->clock == 0) 1160 return MODE_CLOCK_LOW; 1161 1162 if (mode->hdisplay == 0 || 1163 mode->hsync_start < mode->hdisplay || 1164 mode->hsync_end < mode->hsync_start || 1165 mode->htotal < mode->hsync_end) 1166 return MODE_H_ILLEGAL; 1167 1168 if (mode->vdisplay == 0 || 1169 mode->vsync_start < mode->vdisplay || 1170 mode->vsync_end < mode->vsync_start || 1171 mode->vtotal < mode->vsync_end) 1172 return MODE_V_ILLEGAL; 1173 1174 return MODE_OK; 1175 } 1176 1177 /** 1178 * drm_mode_validate_driver - make sure the mode is somewhat sane 1179 * @dev: drm device 1180 * @mode: mode to check 1181 * 1182 * First do basic validation on the mode, and then allow the driver 1183 * to check for device/driver specific limitations via the optional 1184 * &drm_mode_config_helper_funcs.mode_valid hook. 1185 * 1186 * Returns: 1187 * The mode status 1188 */ 1189 enum drm_mode_status 1190 drm_mode_validate_driver(struct drm_device *dev, 1191 const struct drm_display_mode *mode) 1192 { 1193 enum drm_mode_status status; 1194 1195 status = drm_mode_validate_basic(mode); 1196 if (status != MODE_OK) 1197 return status; 1198 1199 if (dev->mode_config.funcs->mode_valid) 1200 return dev->mode_config.funcs->mode_valid(dev, mode); 1201 else 1202 return MODE_OK; 1203 } 1204 EXPORT_SYMBOL(drm_mode_validate_driver); 1205 1206 /** 1207 * drm_mode_validate_size - make sure modes adhere to size constraints 1208 * @mode: mode to check 1209 * @maxX: maximum width 1210 * @maxY: maximum height 1211 * 1212 * This function is a helper which can be used to validate modes against size 1213 * limitations of the DRM device/connector. If a mode is too big its status 1214 * member is updated with the appropriate validation failure code. The list 1215 * itself is not changed. 1216 * 1217 * Returns: 1218 * The mode status 1219 */ 1220 enum drm_mode_status 1221 drm_mode_validate_size(const struct drm_display_mode *mode, 1222 int maxX, int maxY) 1223 { 1224 if (maxX > 0 && mode->hdisplay > maxX) 1225 return MODE_VIRTUAL_X; 1226 1227 if (maxY > 0 && mode->vdisplay > maxY) 1228 return MODE_VIRTUAL_Y; 1229 1230 return MODE_OK; 1231 } 1232 EXPORT_SYMBOL(drm_mode_validate_size); 1233 1234 /** 1235 * drm_mode_validate_ycbcr420 - add 'ycbcr420-only' modes only when allowed 1236 * @mode: mode to check 1237 * @connector: drm connector under action 1238 * 1239 * This function is a helper which can be used to filter out any YCBCR420 1240 * only mode, when the source doesn't support it. 1241 * 1242 * Returns: 1243 * The mode status 1244 */ 1245 enum drm_mode_status 1246 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode, 1247 struct drm_connector *connector) 1248 { 1249 if (!connector->ycbcr_420_allowed && 1250 drm_mode_is_420_only(&connector->display_info, mode)) 1251 return MODE_NO_420; 1252 1253 return MODE_OK; 1254 } 1255 EXPORT_SYMBOL(drm_mode_validate_ycbcr420); 1256 1257 #define MODE_STATUS(status) [MODE_ ## status + 3] = #status 1258 1259 static const char * const drm_mode_status_names[] = { 1260 MODE_STATUS(OK), 1261 MODE_STATUS(HSYNC), 1262 MODE_STATUS(VSYNC), 1263 MODE_STATUS(H_ILLEGAL), 1264 MODE_STATUS(V_ILLEGAL), 1265 MODE_STATUS(BAD_WIDTH), 1266 MODE_STATUS(NOMODE), 1267 MODE_STATUS(NO_INTERLACE), 1268 MODE_STATUS(NO_DBLESCAN), 1269 MODE_STATUS(NO_VSCAN), 1270 MODE_STATUS(MEM), 1271 MODE_STATUS(VIRTUAL_X), 1272 MODE_STATUS(VIRTUAL_Y), 1273 MODE_STATUS(MEM_VIRT), 1274 MODE_STATUS(NOCLOCK), 1275 MODE_STATUS(CLOCK_HIGH), 1276 MODE_STATUS(CLOCK_LOW), 1277 MODE_STATUS(CLOCK_RANGE), 1278 MODE_STATUS(BAD_HVALUE), 1279 MODE_STATUS(BAD_VVALUE), 1280 MODE_STATUS(BAD_VSCAN), 1281 MODE_STATUS(HSYNC_NARROW), 1282 MODE_STATUS(HSYNC_WIDE), 1283 MODE_STATUS(HBLANK_NARROW), 1284 MODE_STATUS(HBLANK_WIDE), 1285 MODE_STATUS(VSYNC_NARROW), 1286 MODE_STATUS(VSYNC_WIDE), 1287 MODE_STATUS(VBLANK_NARROW), 1288 MODE_STATUS(VBLANK_WIDE), 1289 MODE_STATUS(PANEL), 1290 MODE_STATUS(INTERLACE_WIDTH), 1291 MODE_STATUS(ONE_WIDTH), 1292 MODE_STATUS(ONE_HEIGHT), 1293 MODE_STATUS(ONE_SIZE), 1294 MODE_STATUS(NO_REDUCED), 1295 MODE_STATUS(NO_STEREO), 1296 MODE_STATUS(NO_420), 1297 MODE_STATUS(STALE), 1298 MODE_STATUS(BAD), 1299 MODE_STATUS(ERROR), 1300 }; 1301 1302 #undef MODE_STATUS 1303 1304 const char *drm_get_mode_status_name(enum drm_mode_status status) 1305 { 1306 int index = status + 3; 1307 1308 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names))) 1309 return ""; 1310 1311 return drm_mode_status_names[index]; 1312 } 1313 1314 /** 1315 * drm_mode_prune_invalid - remove invalid modes from mode list 1316 * @dev: DRM device 1317 * @mode_list: list of modes to check 1318 * @verbose: be verbose about it 1319 * 1320 * This helper function can be used to prune a display mode list after 1321 * validation has been completed. All modes whose status is not MODE_OK will be 1322 * removed from the list, and if @verbose the status code and mode name is also 1323 * printed to dmesg. 1324 */ 1325 void drm_mode_prune_invalid(struct drm_device *dev, 1326 struct list_head *mode_list, bool verbose) 1327 { 1328 struct drm_display_mode *mode, *t; 1329 1330 list_for_each_entry_safe(mode, t, mode_list, head) { 1331 if (mode->status != MODE_OK) { 1332 list_del(&mode->head); 1333 if (mode->type & DRM_MODE_TYPE_USERDEF) { 1334 drm_warn(dev, "User-defined mode not supported: " 1335 DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); 1336 } 1337 if (verbose) { 1338 drm_mode_debug_printmodeline(mode); 1339 DRM_DEBUG_KMS("Not using %s mode: %s\n", 1340 mode->name, 1341 drm_get_mode_status_name(mode->status)); 1342 } 1343 drm_mode_destroy(dev, mode); 1344 } 1345 } 1346 } 1347 EXPORT_SYMBOL(drm_mode_prune_invalid); 1348 1349 /** 1350 * drm_mode_compare - compare modes for favorability 1351 * @priv: unused 1352 * @lh_a: list_head for first mode 1353 * @lh_b: list_head for second mode 1354 * 1355 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating 1356 * which is better. 1357 * 1358 * Returns: 1359 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or 1360 * positive if @lh_b is better than @lh_a. 1361 */ 1362 static int drm_mode_compare(void *priv, const struct list_head *lh_a, 1363 const struct list_head *lh_b) 1364 { 1365 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); 1366 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); 1367 int diff; 1368 1369 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - 1370 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); 1371 if (diff) 1372 return diff; 1373 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; 1374 if (diff) 1375 return diff; 1376 1377 diff = drm_mode_vrefresh(b) - drm_mode_vrefresh(a); 1378 if (diff) 1379 return diff; 1380 1381 diff = b->clock - a->clock; 1382 return diff; 1383 } 1384 1385 /** 1386 * drm_mode_sort - sort mode list 1387 * @mode_list: list of drm_display_mode structures to sort 1388 * 1389 * Sort @mode_list by favorability, moving good modes to the head of the list. 1390 */ 1391 void drm_mode_sort(struct list_head *mode_list) 1392 { 1393 list_sort(NULL, mode_list, drm_mode_compare); 1394 } 1395 EXPORT_SYMBOL(drm_mode_sort); 1396 1397 /** 1398 * drm_connector_list_update - update the mode list for the connector 1399 * @connector: the connector to update 1400 * 1401 * This moves the modes from the @connector probed_modes list 1402 * to the actual mode list. It compares the probed mode against the current 1403 * list and only adds different/new modes. 1404 * 1405 * This is just a helper functions doesn't validate any modes itself and also 1406 * doesn't prune any invalid modes. Callers need to do that themselves. 1407 */ 1408 void drm_connector_list_update(struct drm_connector *connector) 1409 { 1410 struct drm_display_mode *pmode, *pt; 1411 1412 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); 1413 1414 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) { 1415 struct drm_display_mode *mode; 1416 bool found_it = false; 1417 1418 /* go through current modes checking for the new probed mode */ 1419 list_for_each_entry(mode, &connector->modes, head) { 1420 if (!drm_mode_equal(pmode, mode)) 1421 continue; 1422 1423 found_it = true; 1424 1425 /* 1426 * If the old matching mode is stale (ie. left over 1427 * from a previous probe) just replace it outright. 1428 * Otherwise just merge the type bits between all 1429 * equal probed modes. 1430 * 1431 * If two probed modes are considered equal, pick the 1432 * actual timings from the one that's marked as 1433 * preferred (in case the match isn't 100%). If 1434 * multiple or zero preferred modes are present, favor 1435 * the mode added to the probed_modes list first. 1436 */ 1437 if (mode->status == MODE_STALE) { 1438 drm_mode_copy(mode, pmode); 1439 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 && 1440 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) { 1441 pmode->type |= mode->type; 1442 drm_mode_copy(mode, pmode); 1443 } else { 1444 mode->type |= pmode->type; 1445 } 1446 1447 list_del(&pmode->head); 1448 drm_mode_destroy(connector->dev, pmode); 1449 break; 1450 } 1451 1452 if (!found_it) { 1453 list_move_tail(&pmode->head, &connector->modes); 1454 } 1455 } 1456 } 1457 EXPORT_SYMBOL(drm_connector_list_update); 1458 1459 static int drm_mode_parse_cmdline_bpp(const char *str, char **end_ptr, 1460 struct drm_cmdline_mode *mode) 1461 { 1462 unsigned int bpp; 1463 1464 if (str[0] != '-') 1465 return -EINVAL; 1466 1467 str++; 1468 bpp = simple_strtol(str, end_ptr, 10); 1469 if (*end_ptr == str) 1470 return -EINVAL; 1471 1472 mode->bpp = bpp; 1473 mode->bpp_specified = true; 1474 1475 return 0; 1476 } 1477 1478 static int drm_mode_parse_cmdline_refresh(const char *str, char **end_ptr, 1479 struct drm_cmdline_mode *mode) 1480 { 1481 unsigned int refresh; 1482 1483 if (str[0] != '@') 1484 return -EINVAL; 1485 1486 str++; 1487 refresh = simple_strtol(str, end_ptr, 10); 1488 if (*end_ptr == str) 1489 return -EINVAL; 1490 1491 mode->refresh = refresh; 1492 mode->refresh_specified = true; 1493 1494 return 0; 1495 } 1496 1497 static int drm_mode_parse_cmdline_extra(const char *str, int length, 1498 bool freestanding, 1499 const struct drm_connector *connector, 1500 struct drm_cmdline_mode *mode) 1501 { 1502 int i; 1503 1504 for (i = 0; i < length; i++) { 1505 switch (str[i]) { 1506 case 'i': 1507 if (freestanding) 1508 return -EINVAL; 1509 1510 mode->interlace = true; 1511 break; 1512 case 'm': 1513 if (freestanding) 1514 return -EINVAL; 1515 1516 mode->margins = true; 1517 break; 1518 case 'D': 1519 if (mode->force != DRM_FORCE_UNSPECIFIED) 1520 return -EINVAL; 1521 1522 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 1523 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 1524 mode->force = DRM_FORCE_ON; 1525 else 1526 mode->force = DRM_FORCE_ON_DIGITAL; 1527 break; 1528 case 'd': 1529 if (mode->force != DRM_FORCE_UNSPECIFIED) 1530 return -EINVAL; 1531 1532 mode->force = DRM_FORCE_OFF; 1533 break; 1534 case 'e': 1535 if (mode->force != DRM_FORCE_UNSPECIFIED) 1536 return -EINVAL; 1537 1538 mode->force = DRM_FORCE_ON; 1539 break; 1540 default: 1541 return -EINVAL; 1542 } 1543 } 1544 1545 return 0; 1546 } 1547 1548 static int drm_mode_parse_cmdline_res_mode(const char *str, unsigned int length, 1549 bool extras, 1550 const struct drm_connector *connector, 1551 struct drm_cmdline_mode *mode) 1552 { 1553 const char *str_start = str; 1554 bool rb = false, cvt = false; 1555 int xres = 0, yres = 0; 1556 int remaining, i; 1557 char *end_ptr; 1558 1559 xres = simple_strtol(str, &end_ptr, 10); 1560 if (end_ptr == str) 1561 return -EINVAL; 1562 1563 if (end_ptr[0] != 'x') 1564 return -EINVAL; 1565 end_ptr++; 1566 1567 str = end_ptr; 1568 yres = simple_strtol(str, &end_ptr, 10); 1569 if (end_ptr == str) 1570 return -EINVAL; 1571 1572 remaining = length - (end_ptr - str_start); 1573 if (remaining < 0) 1574 return -EINVAL; 1575 1576 for (i = 0; i < remaining; i++) { 1577 switch (end_ptr[i]) { 1578 case 'M': 1579 cvt = true; 1580 break; 1581 case 'R': 1582 rb = true; 1583 break; 1584 default: 1585 /* 1586 * Try to pass that to our extras parsing 1587 * function to handle the case where the 1588 * extras are directly after the resolution 1589 */ 1590 if (extras) { 1591 int ret = drm_mode_parse_cmdline_extra(end_ptr + i, 1592 1, 1593 false, 1594 connector, 1595 mode); 1596 if (ret) 1597 return ret; 1598 } else { 1599 return -EINVAL; 1600 } 1601 } 1602 } 1603 1604 mode->xres = xres; 1605 mode->yres = yres; 1606 mode->cvt = cvt; 1607 mode->rb = rb; 1608 1609 return 0; 1610 } 1611 1612 static int drm_mode_parse_cmdline_int(const char *delim, unsigned int *int_ret) 1613 { 1614 const char *value; 1615 char *endp; 1616 1617 /* 1618 * delim must point to the '=', otherwise it is a syntax error and 1619 * if delim points to the terminating zero, then delim + 1 will point 1620 * past the end of the string. 1621 */ 1622 if (*delim != '=') 1623 return -EINVAL; 1624 1625 value = delim + 1; 1626 *int_ret = simple_strtol(value, &endp, 10); 1627 1628 /* Make sure we have parsed something */ 1629 if (endp == value) 1630 return -EINVAL; 1631 1632 return 0; 1633 } 1634 1635 static int drm_mode_parse_panel_orientation(const char *delim, 1636 struct drm_cmdline_mode *mode) 1637 { 1638 const char *value; 1639 1640 if (*delim != '=') 1641 return -EINVAL; 1642 1643 value = delim + 1; 1644 delim = strchr(value, ','); 1645 if (!delim) 1646 delim = value + strlen(value); 1647 1648 if (!strncmp(value, "normal", delim - value)) 1649 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL; 1650 else if (!strncmp(value, "upside_down", delim - value)) 1651 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP; 1652 else if (!strncmp(value, "left_side_up", delim - value)) 1653 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_LEFT_UP; 1654 else if (!strncmp(value, "right_side_up", delim - value)) 1655 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_RIGHT_UP; 1656 else 1657 return -EINVAL; 1658 1659 return 0; 1660 } 1661 1662 static int drm_mode_parse_cmdline_options(const char *str, 1663 bool freestanding, 1664 const struct drm_connector *connector, 1665 struct drm_cmdline_mode *mode) 1666 { 1667 unsigned int deg, margin, rotation = 0; 1668 const char *delim, *option, *sep; 1669 1670 option = str; 1671 do { 1672 delim = strchr(option, '='); 1673 if (!delim) { 1674 delim = strchr(option, ','); 1675 1676 if (!delim) 1677 delim = option + strlen(option); 1678 } 1679 1680 if (!strncmp(option, "rotate", delim - option)) { 1681 if (drm_mode_parse_cmdline_int(delim, °)) 1682 return -EINVAL; 1683 1684 switch (deg) { 1685 case 0: 1686 rotation |= DRM_MODE_ROTATE_0; 1687 break; 1688 1689 case 90: 1690 rotation |= DRM_MODE_ROTATE_90; 1691 break; 1692 1693 case 180: 1694 rotation |= DRM_MODE_ROTATE_180; 1695 break; 1696 1697 case 270: 1698 rotation |= DRM_MODE_ROTATE_270; 1699 break; 1700 1701 default: 1702 return -EINVAL; 1703 } 1704 } else if (!strncmp(option, "reflect_x", delim - option)) { 1705 rotation |= DRM_MODE_REFLECT_X; 1706 } else if (!strncmp(option, "reflect_y", delim - option)) { 1707 rotation |= DRM_MODE_REFLECT_Y; 1708 } else if (!strncmp(option, "margin_right", delim - option)) { 1709 if (drm_mode_parse_cmdline_int(delim, &margin)) 1710 return -EINVAL; 1711 1712 mode->tv_margins.right = margin; 1713 } else if (!strncmp(option, "margin_left", delim - option)) { 1714 if (drm_mode_parse_cmdline_int(delim, &margin)) 1715 return -EINVAL; 1716 1717 mode->tv_margins.left = margin; 1718 } else if (!strncmp(option, "margin_top", delim - option)) { 1719 if (drm_mode_parse_cmdline_int(delim, &margin)) 1720 return -EINVAL; 1721 1722 mode->tv_margins.top = margin; 1723 } else if (!strncmp(option, "margin_bottom", delim - option)) { 1724 if (drm_mode_parse_cmdline_int(delim, &margin)) 1725 return -EINVAL; 1726 1727 mode->tv_margins.bottom = margin; 1728 } else if (!strncmp(option, "panel_orientation", delim - option)) { 1729 if (drm_mode_parse_panel_orientation(delim, mode)) 1730 return -EINVAL; 1731 } else { 1732 return -EINVAL; 1733 } 1734 sep = strchr(delim, ','); 1735 option = sep + 1; 1736 } while (sep); 1737 1738 if (rotation && freestanding) 1739 return -EINVAL; 1740 1741 if (!(rotation & DRM_MODE_ROTATE_MASK)) 1742 rotation |= DRM_MODE_ROTATE_0; 1743 1744 /* Make sure there is exactly one rotation defined */ 1745 if (!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK)) 1746 return -EINVAL; 1747 1748 mode->rotation_reflection = rotation; 1749 1750 return 0; 1751 } 1752 1753 struct drm_named_mode { 1754 const char *name; 1755 unsigned int pixel_clock_khz; 1756 unsigned int xres; 1757 unsigned int yres; 1758 unsigned int flags; 1759 }; 1760 1761 #define NAMED_MODE(_name, _pclk, _x, _y, _flags) \ 1762 { \ 1763 .name = _name, \ 1764 .pixel_clock_khz = _pclk, \ 1765 .xres = _x, \ 1766 .yres = _y, \ 1767 .flags = _flags, \ 1768 } 1769 1770 static const struct drm_named_mode drm_named_modes[] = { 1771 NAMED_MODE("NTSC", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE), 1772 NAMED_MODE("PAL", 13500, 720, 576, DRM_MODE_FLAG_INTERLACE), 1773 }; 1774 1775 static int drm_mode_parse_cmdline_named_mode(const char *name, 1776 unsigned int name_end, 1777 struct drm_cmdline_mode *cmdline_mode) 1778 { 1779 unsigned int i; 1780 1781 if (!name_end) 1782 return 0; 1783 1784 /* If the name starts with a digit, it's not a named mode */ 1785 if (isdigit(name[0])) 1786 return 0; 1787 1788 /* 1789 * If there's an equal sign in the name, the command-line 1790 * contains only an option and no mode. 1791 */ 1792 if (strnchr(name, name_end, '=')) 1793 return 0; 1794 1795 /* The connection status extras can be set without a mode. */ 1796 if (name_end == 1 && 1797 (name[0] == 'd' || name[0] == 'D' || name[0] == 'e')) 1798 return 0; 1799 1800 /* 1801 * We're sure we're a named mode at this point, iterate over the 1802 * list of modes we're aware of. 1803 */ 1804 for (i = 0; i < ARRAY_SIZE(drm_named_modes); i++) { 1805 const struct drm_named_mode *mode = &drm_named_modes[i]; 1806 int ret; 1807 1808 ret = str_has_prefix(name, mode->name); 1809 if (ret != name_end) 1810 continue; 1811 1812 strcpy(cmdline_mode->name, mode->name); 1813 cmdline_mode->pixel_clock = mode->pixel_clock_khz; 1814 cmdline_mode->xres = mode->xres; 1815 cmdline_mode->yres = mode->yres; 1816 cmdline_mode->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 1817 cmdline_mode->specified = true; 1818 1819 return 1; 1820 } 1821 1822 return -EINVAL; 1823 } 1824 1825 /** 1826 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector 1827 * @mode_option: optional per connector mode option 1828 * @connector: connector to parse modeline for 1829 * @mode: preallocated drm_cmdline_mode structure to fill out 1830 * 1831 * This parses @mode_option command line modeline for modes and options to 1832 * configure the connector. If @mode_option is NULL the default command line 1833 * modeline in fb_mode_option will be parsed instead. 1834 * 1835 * This uses the same parameters as the fb modedb.c, except for an extra 1836 * force-enable, force-enable-digital and force-disable bit at the end:: 1837 * 1838 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 1839 * 1840 * Additionals options can be provided following the mode, using a comma to 1841 * separate each option. Valid options can be found in 1842 * Documentation/fb/modedb.rst. 1843 * 1844 * The intermediate drm_cmdline_mode structure is required to store additional 1845 * options from the command line modline like the force-enable/disable flag. 1846 * 1847 * Returns: 1848 * True if a valid modeline has been parsed, false otherwise. 1849 */ 1850 bool drm_mode_parse_command_line_for_connector(const char *mode_option, 1851 const struct drm_connector *connector, 1852 struct drm_cmdline_mode *mode) 1853 { 1854 const char *name; 1855 bool freestanding = false, parse_extras = false; 1856 unsigned int bpp_off = 0, refresh_off = 0, options_off = 0; 1857 unsigned int mode_end = 0; 1858 const char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; 1859 const char *options_ptr = NULL; 1860 char *bpp_end_ptr = NULL, *refresh_end_ptr = NULL; 1861 int len, ret; 1862 1863 memset(mode, 0, sizeof(*mode)); 1864 mode->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; 1865 1866 if (!mode_option) 1867 return false; 1868 1869 name = mode_option; 1870 1871 /* Locate the start of named options */ 1872 options_ptr = strchr(name, ','); 1873 if (options_ptr) 1874 options_off = options_ptr - name; 1875 else 1876 options_off = strlen(name); 1877 1878 /* Try to locate the bpp and refresh specifiers, if any */ 1879 bpp_ptr = strnchr(name, options_off, '-'); 1880 while (bpp_ptr && !isdigit(bpp_ptr[1])) 1881 bpp_ptr = strnchr(bpp_ptr + 1, options_off, '-'); 1882 if (bpp_ptr) 1883 bpp_off = bpp_ptr - name; 1884 1885 refresh_ptr = strnchr(name, options_off, '@'); 1886 if (refresh_ptr) 1887 refresh_off = refresh_ptr - name; 1888 1889 /* Locate the end of the name / resolution, and parse it */ 1890 if (bpp_ptr) { 1891 mode_end = bpp_off; 1892 } else if (refresh_ptr) { 1893 mode_end = refresh_off; 1894 } else if (options_ptr) { 1895 mode_end = options_off; 1896 parse_extras = true; 1897 } else { 1898 mode_end = strlen(name); 1899 parse_extras = true; 1900 } 1901 1902 if (!mode_end) 1903 return false; 1904 1905 ret = drm_mode_parse_cmdline_named_mode(name, mode_end, mode); 1906 if (ret < 0) 1907 return false; 1908 1909 /* 1910 * Having a mode that starts by a letter (and thus is named) and 1911 * an at-sign (used to specify a refresh rate) is disallowed. 1912 */ 1913 if (ret && refresh_ptr) 1914 return false; 1915 1916 /* No named mode? Check for a normal mode argument, e.g. 1024x768 */ 1917 if (!mode->specified && isdigit(name[0])) { 1918 ret = drm_mode_parse_cmdline_res_mode(name, mode_end, 1919 parse_extras, 1920 connector, 1921 mode); 1922 if (ret) 1923 return false; 1924 1925 mode->specified = true; 1926 } 1927 1928 /* No mode? Check for freestanding extras and/or options */ 1929 if (!mode->specified) { 1930 unsigned int len = strlen(mode_option); 1931 1932 if (bpp_ptr || refresh_ptr) 1933 return false; /* syntax error */ 1934 1935 if (len == 1 || (len >= 2 && mode_option[1] == ',')) 1936 extra_ptr = mode_option; 1937 else 1938 options_ptr = mode_option - 1; 1939 1940 freestanding = true; 1941 } 1942 1943 if (bpp_ptr) { 1944 ret = drm_mode_parse_cmdline_bpp(bpp_ptr, &bpp_end_ptr, mode); 1945 if (ret) 1946 return false; 1947 1948 mode->bpp_specified = true; 1949 } 1950 1951 if (refresh_ptr) { 1952 ret = drm_mode_parse_cmdline_refresh(refresh_ptr, 1953 &refresh_end_ptr, mode); 1954 if (ret) 1955 return false; 1956 1957 mode->refresh_specified = true; 1958 } 1959 1960 /* 1961 * Locate the end of the bpp / refresh, and parse the extras 1962 * if relevant 1963 */ 1964 if (bpp_ptr && refresh_ptr) 1965 extra_ptr = max(bpp_end_ptr, refresh_end_ptr); 1966 else if (bpp_ptr) 1967 extra_ptr = bpp_end_ptr; 1968 else if (refresh_ptr) 1969 extra_ptr = refresh_end_ptr; 1970 1971 if (extra_ptr) { 1972 if (options_ptr) 1973 len = options_ptr - extra_ptr; 1974 else 1975 len = strlen(extra_ptr); 1976 1977 ret = drm_mode_parse_cmdline_extra(extra_ptr, len, freestanding, 1978 connector, mode); 1979 if (ret) 1980 return false; 1981 } 1982 1983 if (options_ptr) { 1984 ret = drm_mode_parse_cmdline_options(options_ptr + 1, 1985 freestanding, 1986 connector, mode); 1987 if (ret) 1988 return false; 1989 } 1990 1991 return true; 1992 } 1993 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); 1994 1995 /** 1996 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode 1997 * @dev: DRM device to create the new mode for 1998 * @cmd: input command line modeline 1999 * 2000 * Returns: 2001 * Pointer to converted mode on success, NULL on error. 2002 */ 2003 struct drm_display_mode * 2004 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 2005 struct drm_cmdline_mode *cmd) 2006 { 2007 struct drm_display_mode *mode; 2008 2009 if (cmd->xres == 0 || cmd->yres == 0) 2010 return NULL; 2011 2012 if (cmd->cvt) 2013 mode = drm_cvt_mode(dev, 2014 cmd->xres, cmd->yres, 2015 cmd->refresh_specified ? cmd->refresh : 60, 2016 cmd->rb, cmd->interlace, 2017 cmd->margins); 2018 else 2019 mode = drm_gtf_mode(dev, 2020 cmd->xres, cmd->yres, 2021 cmd->refresh_specified ? cmd->refresh : 60, 2022 cmd->interlace, 2023 cmd->margins); 2024 if (!mode) 2025 return NULL; 2026 2027 mode->type |= DRM_MODE_TYPE_USERDEF; 2028 /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */ 2029 if (cmd->xres == 1366) 2030 drm_mode_fixup_1366x768(mode); 2031 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2032 return mode; 2033 } 2034 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); 2035 2036 /** 2037 * drm_mode_convert_to_umode - convert a drm_display_mode into a modeinfo 2038 * @out: drm_mode_modeinfo struct to return to the user 2039 * @in: drm_display_mode to use 2040 * 2041 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 2042 * the user. 2043 */ 2044 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 2045 const struct drm_display_mode *in) 2046 { 2047 out->clock = in->clock; 2048 out->hdisplay = in->hdisplay; 2049 out->hsync_start = in->hsync_start; 2050 out->hsync_end = in->hsync_end; 2051 out->htotal = in->htotal; 2052 out->hskew = in->hskew; 2053 out->vdisplay = in->vdisplay; 2054 out->vsync_start = in->vsync_start; 2055 out->vsync_end = in->vsync_end; 2056 out->vtotal = in->vtotal; 2057 out->vscan = in->vscan; 2058 out->vrefresh = drm_mode_vrefresh(in); 2059 out->flags = in->flags; 2060 out->type = in->type; 2061 2062 switch (in->picture_aspect_ratio) { 2063 case HDMI_PICTURE_ASPECT_4_3: 2064 out->flags |= DRM_MODE_FLAG_PIC_AR_4_3; 2065 break; 2066 case HDMI_PICTURE_ASPECT_16_9: 2067 out->flags |= DRM_MODE_FLAG_PIC_AR_16_9; 2068 break; 2069 case HDMI_PICTURE_ASPECT_64_27: 2070 out->flags |= DRM_MODE_FLAG_PIC_AR_64_27; 2071 break; 2072 case HDMI_PICTURE_ASPECT_256_135: 2073 out->flags |= DRM_MODE_FLAG_PIC_AR_256_135; 2074 break; 2075 default: 2076 WARN(1, "Invalid aspect ratio (0%x) on mode\n", 2077 in->picture_aspect_ratio); 2078 fallthrough; 2079 case HDMI_PICTURE_ASPECT_NONE: 2080 out->flags |= DRM_MODE_FLAG_PIC_AR_NONE; 2081 break; 2082 } 2083 2084 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 2085 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 2086 } 2087 2088 /** 2089 * drm_mode_convert_umode - convert a modeinfo into a drm_display_mode 2090 * @dev: drm device 2091 * @out: drm_display_mode to return to the user 2092 * @in: drm_mode_modeinfo to use 2093 * 2094 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 2095 * the caller. 2096 * 2097 * Returns: 2098 * Zero on success, negative errno on failure. 2099 */ 2100 int drm_mode_convert_umode(struct drm_device *dev, 2101 struct drm_display_mode *out, 2102 const struct drm_mode_modeinfo *in) 2103 { 2104 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 2105 return -ERANGE; 2106 2107 out->clock = in->clock; 2108 out->hdisplay = in->hdisplay; 2109 out->hsync_start = in->hsync_start; 2110 out->hsync_end = in->hsync_end; 2111 out->htotal = in->htotal; 2112 out->hskew = in->hskew; 2113 out->vdisplay = in->vdisplay; 2114 out->vsync_start = in->vsync_start; 2115 out->vsync_end = in->vsync_end; 2116 out->vtotal = in->vtotal; 2117 out->vscan = in->vscan; 2118 out->flags = in->flags; 2119 /* 2120 * Old xf86-video-vmware (possibly others too) used to 2121 * leave 'type' uninitialized. Just ignore any bits we 2122 * don't like. It's a just hint after all, and more 2123 * useful for the kernel->userspace direction anyway. 2124 */ 2125 out->type = in->type & DRM_MODE_TYPE_ALL; 2126 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 2127 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 2128 2129 /* Clearing picture aspect ratio bits from out flags, 2130 * as the aspect-ratio information is not stored in 2131 * flags for kernel-mode, but in picture_aspect_ratio. 2132 */ 2133 out->flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 2134 2135 switch (in->flags & DRM_MODE_FLAG_PIC_AR_MASK) { 2136 case DRM_MODE_FLAG_PIC_AR_4_3: 2137 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3; 2138 break; 2139 case DRM_MODE_FLAG_PIC_AR_16_9: 2140 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9; 2141 break; 2142 case DRM_MODE_FLAG_PIC_AR_64_27: 2143 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27; 2144 break; 2145 case DRM_MODE_FLAG_PIC_AR_256_135: 2146 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135; 2147 break; 2148 case DRM_MODE_FLAG_PIC_AR_NONE: 2149 out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE; 2150 break; 2151 default: 2152 return -EINVAL; 2153 } 2154 2155 out->status = drm_mode_validate_driver(dev, out); 2156 if (out->status != MODE_OK) 2157 return -EINVAL; 2158 2159 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V); 2160 2161 return 0; 2162 } 2163 2164 /** 2165 * drm_mode_is_420_only - if a given videomode can be only supported in YCBCR420 2166 * output format 2167 * 2168 * @display: display under action 2169 * @mode: video mode to be tested. 2170 * 2171 * Returns: 2172 * true if the mode can be supported in YCBCR420 format 2173 * false if not. 2174 */ 2175 bool drm_mode_is_420_only(const struct drm_display_info *display, 2176 const struct drm_display_mode *mode) 2177 { 2178 u8 vic = drm_match_cea_mode(mode); 2179 2180 return test_bit(vic, display->hdmi.y420_vdb_modes); 2181 } 2182 EXPORT_SYMBOL(drm_mode_is_420_only); 2183 2184 /** 2185 * drm_mode_is_420_also - if a given videomode can be supported in YCBCR420 2186 * output format also (along with RGB/YCBCR444/422) 2187 * 2188 * @display: display under action. 2189 * @mode: video mode to be tested. 2190 * 2191 * Returns: 2192 * true if the mode can be support YCBCR420 format 2193 * false if not. 2194 */ 2195 bool drm_mode_is_420_also(const struct drm_display_info *display, 2196 const struct drm_display_mode *mode) 2197 { 2198 u8 vic = drm_match_cea_mode(mode); 2199 2200 return test_bit(vic, display->hdmi.y420_cmdb_modes); 2201 } 2202 EXPORT_SYMBOL(drm_mode_is_420_also); 2203 /** 2204 * drm_mode_is_420 - if a given videomode can be supported in YCBCR420 2205 * output format 2206 * 2207 * @display: display under action. 2208 * @mode: video mode to be tested. 2209 * 2210 * Returns: 2211 * true if the mode can be supported in YCBCR420 format 2212 * false if not. 2213 */ 2214 bool drm_mode_is_420(const struct drm_display_info *display, 2215 const struct drm_display_mode *mode) 2216 { 2217 return drm_mode_is_420_only(display, mode) || 2218 drm_mode_is_420_also(display, mode); 2219 } 2220 EXPORT_SYMBOL(drm_mode_is_420); 2221