1 /* 2 * Copyright (c) 2006-2009 Red Hat Inc. 3 * Copyright (c) 2006-2008 Intel Corporation 4 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 5 * 6 * DRM framebuffer helper functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Dave Airlie <airlied@linux.ie> 28 * Jesse Barnes <jesse.barnes@intel.com> 29 */ 30 #include <linux/kernel.h> 31 #include <linux/sysrq.h> 32 #include <linux/slab.h> 33 #include <linux/fb.h> 34 #include "drmP.h" 35 #include "drm_crtc.h" 36 #include "drm_fb_helper.h" 37 #include "drm_crtc_helper.h" 38 39 MODULE_AUTHOR("David Airlie, Jesse Barnes"); 40 MODULE_DESCRIPTION("DRM KMS helper"); 41 MODULE_LICENSE("GPL and additional rights"); 42 43 static LIST_HEAD(kernel_fb_helper_list); 44 45 /* simple single crtc case helper function */ 46 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) 47 { 48 struct drm_device *dev = fb_helper->dev; 49 struct drm_connector *connector; 50 int i; 51 52 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 53 struct drm_fb_helper_connector *fb_helper_connector; 54 55 fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); 56 if (!fb_helper_connector) 57 goto fail; 58 59 fb_helper_connector->connector = connector; 60 fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; 61 } 62 return 0; 63 fail: 64 for (i = 0; i < fb_helper->connector_count; i++) { 65 kfree(fb_helper->connector_info[i]); 66 fb_helper->connector_info[i] = NULL; 67 } 68 fb_helper->connector_count = 0; 69 return -ENOMEM; 70 } 71 EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); 72 73 /** 74 * drm_fb_helper_connector_parse_command_line - parse command line for connector 75 * @connector - connector to parse line for 76 * @mode_option - per connector mode option 77 * 78 * This parses the connector specific then generic command lines for 79 * modes and options to configure the connector. 80 * 81 * This uses the same parameters as the fb modedb.c, except for extra 82 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] 83 * 84 * enable/enable Digital/disable bit at the end 85 */ 86 static bool drm_fb_helper_connector_parse_command_line(struct drm_fb_helper_connector *fb_helper_conn, 87 const char *mode_option) 88 { 89 const char *name; 90 unsigned int namelen; 91 int res_specified = 0, bpp_specified = 0, refresh_specified = 0; 92 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0; 93 int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0; 94 int i; 95 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; 96 struct drm_fb_helper_cmdline_mode *cmdline_mode; 97 struct drm_connector *connector; 98 99 if (!fb_helper_conn) 100 return false; 101 connector = fb_helper_conn->connector; 102 103 cmdline_mode = &fb_helper_conn->cmdline_mode; 104 if (!mode_option) 105 mode_option = fb_mode_option; 106 107 if (!mode_option) { 108 cmdline_mode->specified = false; 109 return false; 110 } 111 112 name = mode_option; 113 namelen = strlen(name); 114 for (i = namelen-1; i >= 0; i--) { 115 switch (name[i]) { 116 case '@': 117 namelen = i; 118 if (!refresh_specified && !bpp_specified && 119 !yres_specified) { 120 refresh = simple_strtol(&name[i+1], NULL, 10); 121 refresh_specified = 1; 122 if (cvt || rb) 123 cvt = 0; 124 } else 125 goto done; 126 break; 127 case '-': 128 namelen = i; 129 if (!bpp_specified && !yres_specified) { 130 bpp = simple_strtol(&name[i+1], NULL, 10); 131 bpp_specified = 1; 132 if (cvt || rb) 133 cvt = 0; 134 } else 135 goto done; 136 break; 137 case 'x': 138 if (!yres_specified) { 139 yres = simple_strtol(&name[i+1], NULL, 10); 140 yres_specified = 1; 141 } else 142 goto done; 143 case '0' ... '9': 144 break; 145 case 'M': 146 if (!yres_specified) 147 cvt = 1; 148 break; 149 case 'R': 150 if (cvt) 151 rb = 1; 152 break; 153 case 'm': 154 if (!cvt) 155 margins = 1; 156 break; 157 case 'i': 158 if (!cvt) 159 interlace = 1; 160 break; 161 case 'e': 162 force = DRM_FORCE_ON; 163 break; 164 case 'D': 165 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && 166 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) 167 force = DRM_FORCE_ON; 168 else 169 force = DRM_FORCE_ON_DIGITAL; 170 break; 171 case 'd': 172 force = DRM_FORCE_OFF; 173 break; 174 default: 175 goto done; 176 } 177 } 178 if (i < 0 && yres_specified) { 179 xres = simple_strtol(name, NULL, 10); 180 res_specified = 1; 181 } 182 done: 183 184 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 185 drm_get_connector_name(connector), xres, yres, 186 (refresh) ? refresh : 60, (rb) ? " reduced blanking" : 187 "", (margins) ? " with margins" : "", (interlace) ? 188 " interlaced" : ""); 189 190 if (force) { 191 const char *s; 192 switch (force) { 193 case DRM_FORCE_OFF: s = "OFF"; break; 194 case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break; 195 default: 196 case DRM_FORCE_ON: s = "ON"; break; 197 } 198 199 DRM_INFO("forcing %s connector %s\n", 200 drm_get_connector_name(connector), s); 201 connector->force = force; 202 } 203 204 if (res_specified) { 205 cmdline_mode->specified = true; 206 cmdline_mode->xres = xres; 207 cmdline_mode->yres = yres; 208 } 209 210 if (refresh_specified) { 211 cmdline_mode->refresh_specified = true; 212 cmdline_mode->refresh = refresh; 213 } 214 215 if (bpp_specified) { 216 cmdline_mode->bpp_specified = true; 217 cmdline_mode->bpp = bpp; 218 } 219 cmdline_mode->rb = rb ? true : false; 220 cmdline_mode->cvt = cvt ? true : false; 221 cmdline_mode->interlace = interlace ? true : false; 222 223 return true; 224 } 225 226 static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper) 227 { 228 struct drm_fb_helper_connector *fb_helper_conn; 229 int i; 230 231 for (i = 0; i < fb_helper->connector_count; i++) { 232 char *option = NULL; 233 234 fb_helper_conn = fb_helper->connector_info[i]; 235 236 /* do something on return - turn off connector maybe */ 237 if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option)) 238 continue; 239 240 drm_fb_helper_connector_parse_command_line(fb_helper_conn, option); 241 } 242 return 0; 243 } 244 245 static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) 246 { 247 uint16_t *r_base, *g_base, *b_base; 248 int i; 249 250 r_base = crtc->gamma_store; 251 g_base = r_base + crtc->gamma_size; 252 b_base = g_base + crtc->gamma_size; 253 254 for (i = 0; i < crtc->gamma_size; i++) 255 helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); 256 } 257 258 static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) 259 { 260 uint16_t *r_base, *g_base, *b_base; 261 262 r_base = crtc->gamma_store; 263 g_base = r_base + crtc->gamma_size; 264 b_base = g_base + crtc->gamma_size; 265 266 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 267 } 268 269 int drm_fb_helper_debug_enter(struct fb_info *info) 270 { 271 struct drm_fb_helper *helper = info->par; 272 struct drm_crtc_helper_funcs *funcs; 273 int i; 274 275 if (list_empty(&kernel_fb_helper_list)) 276 return false; 277 278 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { 279 for (i = 0; i < helper->crtc_count; i++) { 280 struct drm_mode_set *mode_set = 281 &helper->crtc_info[i].mode_set; 282 283 if (!mode_set->crtc->enabled) 284 continue; 285 286 funcs = mode_set->crtc->helper_private; 287 drm_fb_helper_save_lut_atomic(mode_set->crtc, helper); 288 funcs->mode_set_base_atomic(mode_set->crtc, 289 mode_set->fb, 290 mode_set->x, 291 mode_set->y, 292 ENTER_ATOMIC_MODE_SET); 293 } 294 } 295 296 return 0; 297 } 298 EXPORT_SYMBOL(drm_fb_helper_debug_enter); 299 300 /* Find the real fb for a given fb helper CRTC */ 301 static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) 302 { 303 struct drm_device *dev = crtc->dev; 304 struct drm_crtc *c; 305 306 list_for_each_entry(c, &dev->mode_config.crtc_list, head) { 307 if (crtc->base.id == c->base.id) 308 return c->fb; 309 } 310 311 return NULL; 312 } 313 314 int drm_fb_helper_debug_leave(struct fb_info *info) 315 { 316 struct drm_fb_helper *helper = info->par; 317 struct drm_crtc *crtc; 318 struct drm_crtc_helper_funcs *funcs; 319 struct drm_framebuffer *fb; 320 int i; 321 322 for (i = 0; i < helper->crtc_count; i++) { 323 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; 324 crtc = mode_set->crtc; 325 funcs = crtc->helper_private; 326 fb = drm_mode_config_fb(crtc); 327 328 if (!crtc->enabled) 329 continue; 330 331 if (!fb) { 332 DRM_ERROR("no fb to restore??\n"); 333 continue; 334 } 335 336 drm_fb_helper_restore_lut_atomic(mode_set->crtc); 337 funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, 338 crtc->y, LEAVE_ATOMIC_MODE_SET); 339 } 340 341 return 0; 342 } 343 EXPORT_SYMBOL(drm_fb_helper_debug_leave); 344 345 bool drm_fb_helper_force_kernel_mode(void) 346 { 347 int i = 0; 348 bool ret, error = false; 349 struct drm_fb_helper *helper; 350 351 if (list_empty(&kernel_fb_helper_list)) 352 return false; 353 354 list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { 355 for (i = 0; i < helper->crtc_count; i++) { 356 struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; 357 ret = drm_crtc_helper_set_config(mode_set); 358 if (ret) 359 error = true; 360 } 361 } 362 return error; 363 } 364 365 int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed, 366 void *panic_str) 367 { 368 printk(KERN_ERR "panic occurred, switching back to text console\n"); 369 return drm_fb_helper_force_kernel_mode(); 370 return 0; 371 } 372 EXPORT_SYMBOL(drm_fb_helper_panic); 373 374 static struct notifier_block paniced = { 375 .notifier_call = drm_fb_helper_panic, 376 }; 377 378 /** 379 * drm_fb_helper_restore - restore the framebuffer console (kernel) config 380 * 381 * Restore's the kernel's fbcon mode, used for lastclose & panic paths. 382 */ 383 void drm_fb_helper_restore(void) 384 { 385 bool ret; 386 ret = drm_fb_helper_force_kernel_mode(); 387 if (ret == true) 388 DRM_ERROR("Failed to restore crtc configuration\n"); 389 } 390 EXPORT_SYMBOL(drm_fb_helper_restore); 391 392 #ifdef CONFIG_MAGIC_SYSRQ 393 static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) 394 { 395 drm_fb_helper_restore(); 396 } 397 static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); 398 399 static void drm_fb_helper_sysrq(int dummy1) 400 { 401 schedule_work(&drm_fb_helper_restore_work); 402 } 403 404 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { 405 .handler = drm_fb_helper_sysrq, 406 .help_msg = "force-fb(V)", 407 .action_msg = "Restore framebuffer console", 408 }; 409 #else 410 static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; 411 #endif 412 413 static void drm_fb_helper_on(struct fb_info *info) 414 { 415 struct drm_fb_helper *fb_helper = info->par; 416 struct drm_device *dev = fb_helper->dev; 417 struct drm_crtc *crtc; 418 struct drm_crtc_helper_funcs *crtc_funcs; 419 struct drm_connector *connector; 420 struct drm_encoder *encoder; 421 int i, j; 422 423 /* 424 * For each CRTC in this fb, turn the crtc on then, 425 * find all associated encoders and turn them on. 426 */ 427 mutex_lock(&dev->mode_config.mutex); 428 for (i = 0; i < fb_helper->crtc_count; i++) { 429 crtc = fb_helper->crtc_info[i].mode_set.crtc; 430 crtc_funcs = crtc->helper_private; 431 432 if (!crtc->enabled) 433 continue; 434 435 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON); 436 437 /* Walk the connectors & encoders on this fb turning them on */ 438 for (j = 0; j < fb_helper->connector_count; j++) { 439 connector = fb_helper->connector_info[j]->connector; 440 connector->dpms = DRM_MODE_DPMS_ON; 441 drm_connector_property_set_value(connector, 442 dev->mode_config.dpms_property, 443 DRM_MODE_DPMS_ON); 444 } 445 /* Found a CRTC on this fb, now find encoders */ 446 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 447 if (encoder->crtc == crtc) { 448 struct drm_encoder_helper_funcs *encoder_funcs; 449 450 encoder_funcs = encoder->helper_private; 451 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON); 452 } 453 } 454 } 455 mutex_unlock(&dev->mode_config.mutex); 456 } 457 458 static void drm_fb_helper_off(struct fb_info *info, int dpms_mode) 459 { 460 struct drm_fb_helper *fb_helper = info->par; 461 struct drm_device *dev = fb_helper->dev; 462 struct drm_crtc *crtc; 463 struct drm_crtc_helper_funcs *crtc_funcs; 464 struct drm_connector *connector; 465 struct drm_encoder *encoder; 466 int i, j; 467 468 /* 469 * For each CRTC in this fb, find all associated encoders 470 * and turn them off, then turn off the CRTC. 471 */ 472 mutex_lock(&dev->mode_config.mutex); 473 for (i = 0; i < fb_helper->crtc_count; i++) { 474 crtc = fb_helper->crtc_info[i].mode_set.crtc; 475 crtc_funcs = crtc->helper_private; 476 477 if (!crtc->enabled) 478 continue; 479 480 /* Walk the connectors on this fb and mark them off */ 481 for (j = 0; j < fb_helper->connector_count; j++) { 482 connector = fb_helper->connector_info[j]->connector; 483 connector->dpms = dpms_mode; 484 drm_connector_property_set_value(connector, 485 dev->mode_config.dpms_property, 486 dpms_mode); 487 } 488 /* Found a CRTC on this fb, now find encoders */ 489 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 490 if (encoder->crtc == crtc) { 491 struct drm_encoder_helper_funcs *encoder_funcs; 492 493 encoder_funcs = encoder->helper_private; 494 encoder_funcs->dpms(encoder, dpms_mode); 495 } 496 } 497 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF); 498 } 499 mutex_unlock(&dev->mode_config.mutex); 500 } 501 502 int drm_fb_helper_blank(int blank, struct fb_info *info) 503 { 504 switch (blank) { 505 /* Display: On; HSync: On, VSync: On */ 506 case FB_BLANK_UNBLANK: 507 drm_fb_helper_on(info); 508 break; 509 /* Display: Off; HSync: On, VSync: On */ 510 case FB_BLANK_NORMAL: 511 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY); 512 break; 513 /* Display: Off; HSync: Off, VSync: On */ 514 case FB_BLANK_HSYNC_SUSPEND: 515 drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY); 516 break; 517 /* Display: Off; HSync: On, VSync: Off */ 518 case FB_BLANK_VSYNC_SUSPEND: 519 drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND); 520 break; 521 /* Display: Off; HSync: Off, VSync: Off */ 522 case FB_BLANK_POWERDOWN: 523 drm_fb_helper_off(info, DRM_MODE_DPMS_OFF); 524 break; 525 } 526 return 0; 527 } 528 EXPORT_SYMBOL(drm_fb_helper_blank); 529 530 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) 531 { 532 int i; 533 534 for (i = 0; i < helper->connector_count; i++) 535 kfree(helper->connector_info[i]); 536 kfree(helper->connector_info); 537 for (i = 0; i < helper->crtc_count; i++) 538 kfree(helper->crtc_info[i].mode_set.connectors); 539 kfree(helper->crtc_info); 540 } 541 542 int drm_fb_helper_init(struct drm_device *dev, 543 struct drm_fb_helper *fb_helper, 544 int crtc_count, int max_conn_count) 545 { 546 struct drm_crtc *crtc; 547 int ret = 0; 548 int i; 549 550 fb_helper->dev = dev; 551 552 INIT_LIST_HEAD(&fb_helper->kernel_fb_list); 553 554 fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); 555 if (!fb_helper->crtc_info) 556 return -ENOMEM; 557 558 fb_helper->crtc_count = crtc_count; 559 fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); 560 if (!fb_helper->connector_info) { 561 kfree(fb_helper->crtc_info); 562 return -ENOMEM; 563 } 564 fb_helper->connector_count = 0; 565 566 for (i = 0; i < crtc_count; i++) { 567 fb_helper->crtc_info[i].mode_set.connectors = 568 kcalloc(max_conn_count, 569 sizeof(struct drm_connector *), 570 GFP_KERNEL); 571 572 if (!fb_helper->crtc_info[i].mode_set.connectors) { 573 ret = -ENOMEM; 574 goto out_free; 575 } 576 fb_helper->crtc_info[i].mode_set.num_connectors = 0; 577 } 578 579 i = 0; 580 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 581 fb_helper->crtc_info[i].crtc_id = crtc->base.id; 582 fb_helper->crtc_info[i].mode_set.crtc = crtc; 583 i++; 584 } 585 fb_helper->conn_limit = max_conn_count; 586 return 0; 587 out_free: 588 drm_fb_helper_crtc_free(fb_helper); 589 return -ENOMEM; 590 } 591 EXPORT_SYMBOL(drm_fb_helper_init); 592 593 void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) 594 { 595 if (!list_empty(&fb_helper->kernel_fb_list)) { 596 list_del(&fb_helper->kernel_fb_list); 597 if (list_empty(&kernel_fb_helper_list)) { 598 printk(KERN_INFO "drm: unregistered panic notifier\n"); 599 atomic_notifier_chain_unregister(&panic_notifier_list, 600 &paniced); 601 unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); 602 } 603 } 604 605 drm_fb_helper_crtc_free(fb_helper); 606 607 } 608 EXPORT_SYMBOL(drm_fb_helper_fini); 609 610 static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, 611 u16 blue, u16 regno, struct fb_info *info) 612 { 613 struct drm_fb_helper *fb_helper = info->par; 614 struct drm_framebuffer *fb = fb_helper->fb; 615 int pindex; 616 617 if (info->fix.visual == FB_VISUAL_TRUECOLOR) { 618 u32 *palette; 619 u32 value; 620 /* place color in psuedopalette */ 621 if (regno > 16) 622 return -EINVAL; 623 palette = (u32 *)info->pseudo_palette; 624 red >>= (16 - info->var.red.length); 625 green >>= (16 - info->var.green.length); 626 blue >>= (16 - info->var.blue.length); 627 value = (red << info->var.red.offset) | 628 (green << info->var.green.offset) | 629 (blue << info->var.blue.offset); 630 palette[regno] = value; 631 return 0; 632 } 633 634 pindex = regno; 635 636 if (fb->bits_per_pixel == 16) { 637 pindex = regno << 3; 638 639 if (fb->depth == 16 && regno > 63) 640 return -EINVAL; 641 if (fb->depth == 15 && regno > 31) 642 return -EINVAL; 643 644 if (fb->depth == 16) { 645 u16 r, g, b; 646 int i; 647 if (regno < 32) { 648 for (i = 0; i < 8; i++) 649 fb_helper->funcs->gamma_set(crtc, red, 650 green, blue, pindex + i); 651 } 652 653 fb_helper->funcs->gamma_get(crtc, &r, 654 &g, &b, 655 pindex >> 1); 656 657 for (i = 0; i < 4; i++) 658 fb_helper->funcs->gamma_set(crtc, r, 659 green, b, 660 (pindex >> 1) + i); 661 } 662 } 663 664 if (fb->depth != 16) 665 fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex); 666 return 0; 667 } 668 669 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) 670 { 671 struct drm_fb_helper *fb_helper = info->par; 672 struct drm_crtc_helper_funcs *crtc_funcs; 673 u16 *red, *green, *blue, *transp; 674 struct drm_crtc *crtc; 675 int i, j, rc = 0; 676 int start; 677 678 for (i = 0; i < fb_helper->crtc_count; i++) { 679 crtc = fb_helper->crtc_info[i].mode_set.crtc; 680 crtc_funcs = crtc->helper_private; 681 682 red = cmap->red; 683 green = cmap->green; 684 blue = cmap->blue; 685 transp = cmap->transp; 686 start = cmap->start; 687 688 for (j = 0; j < cmap->len; j++) { 689 u16 hred, hgreen, hblue, htransp = 0xffff; 690 691 hred = *red++; 692 hgreen = *green++; 693 hblue = *blue++; 694 695 if (transp) 696 htransp = *transp++; 697 698 rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); 699 if (rc) 700 return rc; 701 } 702 crtc_funcs->load_lut(crtc); 703 } 704 return rc; 705 } 706 EXPORT_SYMBOL(drm_fb_helper_setcmap); 707 708 int drm_fb_helper_check_var(struct fb_var_screeninfo *var, 709 struct fb_info *info) 710 { 711 struct drm_fb_helper *fb_helper = info->par; 712 struct drm_framebuffer *fb = fb_helper->fb; 713 int depth; 714 715 if (var->pixclock != 0 || in_dbg_master()) 716 return -EINVAL; 717 718 /* Need to resize the fb object !!! */ 719 if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) { 720 DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb " 721 "object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel, 722 fb->width, fb->height, fb->bits_per_pixel); 723 return -EINVAL; 724 } 725 726 switch (var->bits_per_pixel) { 727 case 16: 728 depth = (var->green.length == 6) ? 16 : 15; 729 break; 730 case 32: 731 depth = (var->transp.length > 0) ? 32 : 24; 732 break; 733 default: 734 depth = var->bits_per_pixel; 735 break; 736 } 737 738 switch (depth) { 739 case 8: 740 var->red.offset = 0; 741 var->green.offset = 0; 742 var->blue.offset = 0; 743 var->red.length = 8; 744 var->green.length = 8; 745 var->blue.length = 8; 746 var->transp.length = 0; 747 var->transp.offset = 0; 748 break; 749 case 15: 750 var->red.offset = 10; 751 var->green.offset = 5; 752 var->blue.offset = 0; 753 var->red.length = 5; 754 var->green.length = 5; 755 var->blue.length = 5; 756 var->transp.length = 1; 757 var->transp.offset = 15; 758 break; 759 case 16: 760 var->red.offset = 11; 761 var->green.offset = 5; 762 var->blue.offset = 0; 763 var->red.length = 5; 764 var->green.length = 6; 765 var->blue.length = 5; 766 var->transp.length = 0; 767 var->transp.offset = 0; 768 break; 769 case 24: 770 var->red.offset = 16; 771 var->green.offset = 8; 772 var->blue.offset = 0; 773 var->red.length = 8; 774 var->green.length = 8; 775 var->blue.length = 8; 776 var->transp.length = 0; 777 var->transp.offset = 0; 778 break; 779 case 32: 780 var->red.offset = 16; 781 var->green.offset = 8; 782 var->blue.offset = 0; 783 var->red.length = 8; 784 var->green.length = 8; 785 var->blue.length = 8; 786 var->transp.length = 8; 787 var->transp.offset = 24; 788 break; 789 default: 790 return -EINVAL; 791 } 792 return 0; 793 } 794 EXPORT_SYMBOL(drm_fb_helper_check_var); 795 796 /* this will let fbcon do the mode init */ 797 int drm_fb_helper_set_par(struct fb_info *info) 798 { 799 struct drm_fb_helper *fb_helper = info->par; 800 struct drm_device *dev = fb_helper->dev; 801 struct fb_var_screeninfo *var = &info->var; 802 struct drm_crtc *crtc; 803 int ret; 804 int i; 805 806 if (var->pixclock != 0) { 807 DRM_ERROR("PIXEL CLOCK SET\n"); 808 return -EINVAL; 809 } 810 811 mutex_lock(&dev->mode_config.mutex); 812 for (i = 0; i < fb_helper->crtc_count; i++) { 813 crtc = fb_helper->crtc_info[i].mode_set.crtc; 814 ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set); 815 if (ret) { 816 mutex_unlock(&dev->mode_config.mutex); 817 return ret; 818 } 819 } 820 mutex_unlock(&dev->mode_config.mutex); 821 822 if (fb_helper->delayed_hotplug) { 823 fb_helper->delayed_hotplug = false; 824 drm_fb_helper_hotplug_event(fb_helper); 825 } 826 return 0; 827 } 828 EXPORT_SYMBOL(drm_fb_helper_set_par); 829 830 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, 831 struct fb_info *info) 832 { 833 struct drm_fb_helper *fb_helper = info->par; 834 struct drm_device *dev = fb_helper->dev; 835 struct drm_mode_set *modeset; 836 struct drm_crtc *crtc; 837 int ret = 0; 838 int i; 839 840 mutex_lock(&dev->mode_config.mutex); 841 for (i = 0; i < fb_helper->crtc_count; i++) { 842 crtc = fb_helper->crtc_info[i].mode_set.crtc; 843 844 modeset = &fb_helper->crtc_info[i].mode_set; 845 846 modeset->x = var->xoffset; 847 modeset->y = var->yoffset; 848 849 if (modeset->num_connectors) { 850 ret = crtc->funcs->set_config(modeset); 851 if (!ret) { 852 info->var.xoffset = var->xoffset; 853 info->var.yoffset = var->yoffset; 854 } 855 } 856 } 857 mutex_unlock(&dev->mode_config.mutex); 858 return ret; 859 } 860 EXPORT_SYMBOL(drm_fb_helper_pan_display); 861 862 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, 863 int preferred_bpp) 864 { 865 int new_fb = 0; 866 int crtc_count = 0; 867 int i; 868 struct fb_info *info; 869 struct drm_fb_helper_surface_size sizes; 870 int gamma_size = 0; 871 872 memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); 873 sizes.surface_depth = 24; 874 sizes.surface_bpp = 32; 875 sizes.fb_width = (unsigned)-1; 876 sizes.fb_height = (unsigned)-1; 877 878 /* if driver picks 8 or 16 by default use that 879 for both depth/bpp */ 880 if (preferred_bpp != sizes.surface_bpp) { 881 sizes.surface_depth = sizes.surface_bpp = preferred_bpp; 882 } 883 /* first up get a count of crtcs now in use and new min/maxes width/heights */ 884 for (i = 0; i < fb_helper->connector_count; i++) { 885 struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; 886 struct drm_fb_helper_cmdline_mode *cmdline_mode; 887 888 cmdline_mode = &fb_helper_conn->cmdline_mode; 889 890 if (cmdline_mode->bpp_specified) { 891 switch (cmdline_mode->bpp) { 892 case 8: 893 sizes.surface_depth = sizes.surface_bpp = 8; 894 break; 895 case 15: 896 sizes.surface_depth = 15; 897 sizes.surface_bpp = 16; 898 break; 899 case 16: 900 sizes.surface_depth = sizes.surface_bpp = 16; 901 break; 902 case 24: 903 sizes.surface_depth = sizes.surface_bpp = 24; 904 break; 905 case 32: 906 sizes.surface_depth = 24; 907 sizes.surface_bpp = 32; 908 break; 909 } 910 break; 911 } 912 } 913 914 crtc_count = 0; 915 for (i = 0; i < fb_helper->crtc_count; i++) { 916 struct drm_display_mode *desired_mode; 917 desired_mode = fb_helper->crtc_info[i].desired_mode; 918 919 if (desired_mode) { 920 if (gamma_size == 0) 921 gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; 922 if (desired_mode->hdisplay < sizes.fb_width) 923 sizes.fb_width = desired_mode->hdisplay; 924 if (desired_mode->vdisplay < sizes.fb_height) 925 sizes.fb_height = desired_mode->vdisplay; 926 if (desired_mode->hdisplay > sizes.surface_width) 927 sizes.surface_width = desired_mode->hdisplay; 928 if (desired_mode->vdisplay > sizes.surface_height) 929 sizes.surface_height = desired_mode->vdisplay; 930 crtc_count++; 931 } 932 } 933 934 if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { 935 /* hmm everyone went away - assume VGA cable just fell out 936 and will come back later. */ 937 DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); 938 sizes.fb_width = sizes.surface_width = 1024; 939 sizes.fb_height = sizes.surface_height = 768; 940 } 941 942 /* push down into drivers */ 943 new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); 944 if (new_fb < 0) 945 return new_fb; 946 947 info = fb_helper->fbdev; 948 949 /* set the fb pointer */ 950 for (i = 0; i < fb_helper->crtc_count; i++) { 951 fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; 952 } 953 954 if (new_fb) { 955 info->var.pixclock = 0; 956 if (register_framebuffer(info) < 0) { 957 return -EINVAL; 958 } 959 960 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, 961 info->fix.id); 962 963 } else { 964 drm_fb_helper_set_par(info); 965 } 966 967 /* Switch back to kernel console on panic */ 968 /* multi card linked list maybe */ 969 if (list_empty(&kernel_fb_helper_list)) { 970 printk(KERN_INFO "drm: registered panic notifier\n"); 971 atomic_notifier_chain_register(&panic_notifier_list, 972 &paniced); 973 register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); 974 } 975 if (new_fb) 976 list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); 977 978 return 0; 979 } 980 EXPORT_SYMBOL(drm_fb_helper_single_fb_probe); 981 982 void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, 983 uint32_t depth) 984 { 985 info->fix.type = FB_TYPE_PACKED_PIXELS; 986 info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : 987 FB_VISUAL_TRUECOLOR; 988 info->fix.mmio_start = 0; 989 info->fix.mmio_len = 0; 990 info->fix.type_aux = 0; 991 info->fix.xpanstep = 1; /* doing it in hw */ 992 info->fix.ypanstep = 1; /* doing it in hw */ 993 info->fix.ywrapstep = 0; 994 info->fix.accel = FB_ACCEL_NONE; 995 info->fix.type_aux = 0; 996 997 info->fix.line_length = pitch; 998 return; 999 } 1000 EXPORT_SYMBOL(drm_fb_helper_fill_fix); 1001 1002 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, 1003 uint32_t fb_width, uint32_t fb_height) 1004 { 1005 struct drm_framebuffer *fb = fb_helper->fb; 1006 info->pseudo_palette = fb_helper->pseudo_palette; 1007 info->var.xres_virtual = fb->width; 1008 info->var.yres_virtual = fb->height; 1009 info->var.bits_per_pixel = fb->bits_per_pixel; 1010 info->var.accel_flags = FB_ACCELF_TEXT; 1011 info->var.xoffset = 0; 1012 info->var.yoffset = 0; 1013 info->var.activate = FB_ACTIVATE_NOW; 1014 info->var.height = -1; 1015 info->var.width = -1; 1016 1017 switch (fb->depth) { 1018 case 8: 1019 info->var.red.offset = 0; 1020 info->var.green.offset = 0; 1021 info->var.blue.offset = 0; 1022 info->var.red.length = 8; /* 8bit DAC */ 1023 info->var.green.length = 8; 1024 info->var.blue.length = 8; 1025 info->var.transp.offset = 0; 1026 info->var.transp.length = 0; 1027 break; 1028 case 15: 1029 info->var.red.offset = 10; 1030 info->var.green.offset = 5; 1031 info->var.blue.offset = 0; 1032 info->var.red.length = 5; 1033 info->var.green.length = 5; 1034 info->var.blue.length = 5; 1035 info->var.transp.offset = 15; 1036 info->var.transp.length = 1; 1037 break; 1038 case 16: 1039 info->var.red.offset = 11; 1040 info->var.green.offset = 5; 1041 info->var.blue.offset = 0; 1042 info->var.red.length = 5; 1043 info->var.green.length = 6; 1044 info->var.blue.length = 5; 1045 info->var.transp.offset = 0; 1046 break; 1047 case 24: 1048 info->var.red.offset = 16; 1049 info->var.green.offset = 8; 1050 info->var.blue.offset = 0; 1051 info->var.red.length = 8; 1052 info->var.green.length = 8; 1053 info->var.blue.length = 8; 1054 info->var.transp.offset = 0; 1055 info->var.transp.length = 0; 1056 break; 1057 case 32: 1058 info->var.red.offset = 16; 1059 info->var.green.offset = 8; 1060 info->var.blue.offset = 0; 1061 info->var.red.length = 8; 1062 info->var.green.length = 8; 1063 info->var.blue.length = 8; 1064 info->var.transp.offset = 24; 1065 info->var.transp.length = 8; 1066 break; 1067 default: 1068 break; 1069 } 1070 1071 info->var.xres = fb_width; 1072 info->var.yres = fb_height; 1073 } 1074 EXPORT_SYMBOL(drm_fb_helper_fill_var); 1075 1076 static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, 1077 uint32_t maxX, 1078 uint32_t maxY) 1079 { 1080 struct drm_connector *connector; 1081 int count = 0; 1082 int i; 1083 1084 for (i = 0; i < fb_helper->connector_count; i++) { 1085 connector = fb_helper->connector_info[i]->connector; 1086 count += connector->funcs->fill_modes(connector, maxX, maxY); 1087 } 1088 1089 return count; 1090 } 1091 1092 static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) 1093 { 1094 struct drm_display_mode *mode; 1095 1096 list_for_each_entry(mode, &fb_connector->connector->modes, head) { 1097 if (drm_mode_width(mode) > width || 1098 drm_mode_height(mode) > height) 1099 continue; 1100 if (mode->type & DRM_MODE_TYPE_PREFERRED) 1101 return mode; 1102 } 1103 return NULL; 1104 } 1105 1106 static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) 1107 { 1108 struct drm_fb_helper_cmdline_mode *cmdline_mode; 1109 cmdline_mode = &fb_connector->cmdline_mode; 1110 return cmdline_mode->specified; 1111 } 1112 1113 static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, 1114 int width, int height) 1115 { 1116 struct drm_fb_helper_cmdline_mode *cmdline_mode; 1117 struct drm_display_mode *mode = NULL; 1118 1119 cmdline_mode = &fb_helper_conn->cmdline_mode; 1120 if (cmdline_mode->specified == false) 1121 return mode; 1122 1123 /* attempt to find a matching mode in the list of modes 1124 * we have gotten so far, if not add a CVT mode that conforms 1125 */ 1126 if (cmdline_mode->rb || cmdline_mode->margins) 1127 goto create_mode; 1128 1129 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { 1130 /* check width/height */ 1131 if (mode->hdisplay != cmdline_mode->xres || 1132 mode->vdisplay != cmdline_mode->yres) 1133 continue; 1134 1135 if (cmdline_mode->refresh_specified) { 1136 if (mode->vrefresh != cmdline_mode->refresh) 1137 continue; 1138 } 1139 1140 if (cmdline_mode->interlace) { 1141 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) 1142 continue; 1143 } 1144 return mode; 1145 } 1146 1147 create_mode: 1148 if (cmdline_mode->cvt) 1149 mode = drm_cvt_mode(fb_helper_conn->connector->dev, 1150 cmdline_mode->xres, cmdline_mode->yres, 1151 cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60, 1152 cmdline_mode->rb, cmdline_mode->interlace, 1153 cmdline_mode->margins); 1154 else 1155 mode = drm_gtf_mode(fb_helper_conn->connector->dev, 1156 cmdline_mode->xres, cmdline_mode->yres, 1157 cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60, 1158 cmdline_mode->interlace, 1159 cmdline_mode->margins); 1160 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 1161 list_add(&mode->head, &fb_helper_conn->connector->modes); 1162 return mode; 1163 } 1164 1165 static bool drm_connector_enabled(struct drm_connector *connector, bool strict) 1166 { 1167 bool enable; 1168 1169 if (strict) { 1170 enable = connector->status == connector_status_connected; 1171 } else { 1172 enable = connector->status != connector_status_disconnected; 1173 } 1174 return enable; 1175 } 1176 1177 static void drm_enable_connectors(struct drm_fb_helper *fb_helper, 1178 bool *enabled) 1179 { 1180 bool any_enabled = false; 1181 struct drm_connector *connector; 1182 int i = 0; 1183 1184 for (i = 0; i < fb_helper->connector_count; i++) { 1185 connector = fb_helper->connector_info[i]->connector; 1186 enabled[i] = drm_connector_enabled(connector, true); 1187 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, 1188 enabled[i] ? "yes" : "no"); 1189 any_enabled |= enabled[i]; 1190 } 1191 1192 if (any_enabled) 1193 return; 1194 1195 for (i = 0; i < fb_helper->connector_count; i++) { 1196 connector = fb_helper->connector_info[i]->connector; 1197 enabled[i] = drm_connector_enabled(connector, false); 1198 } 1199 } 1200 1201 static bool drm_target_cloned(struct drm_fb_helper *fb_helper, 1202 struct drm_display_mode **modes, 1203 bool *enabled, int width, int height) 1204 { 1205 int count, i, j; 1206 bool can_clone = false; 1207 struct drm_fb_helper_connector *fb_helper_conn; 1208 struct drm_display_mode *dmt_mode, *mode; 1209 1210 /* only contemplate cloning in the single crtc case */ 1211 if (fb_helper->crtc_count > 1) 1212 return false; 1213 1214 count = 0; 1215 for (i = 0; i < fb_helper->connector_count; i++) { 1216 if (enabled[i]) 1217 count++; 1218 } 1219 1220 /* only contemplate cloning if more than one connector is enabled */ 1221 if (count <= 1) 1222 return false; 1223 1224 /* check the command line or if nothing common pick 1024x768 */ 1225 can_clone = true; 1226 for (i = 0; i < fb_helper->connector_count; i++) { 1227 if (!enabled[i]) 1228 continue; 1229 fb_helper_conn = fb_helper->connector_info[i]; 1230 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); 1231 if (!modes[i]) { 1232 can_clone = false; 1233 break; 1234 } 1235 for (j = 0; j < i; j++) { 1236 if (!enabled[j]) 1237 continue; 1238 if (!drm_mode_equal(modes[j], modes[i])) 1239 can_clone = false; 1240 } 1241 } 1242 1243 if (can_clone) { 1244 DRM_DEBUG_KMS("can clone using command line\n"); 1245 return true; 1246 } 1247 1248 /* try and find a 1024x768 mode on each connector */ 1249 can_clone = true; 1250 dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60); 1251 1252 for (i = 0; i < fb_helper->connector_count; i++) { 1253 1254 if (!enabled[i]) 1255 continue; 1256 1257 fb_helper_conn = fb_helper->connector_info[i]; 1258 list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { 1259 if (drm_mode_equal(mode, dmt_mode)) 1260 modes[i] = mode; 1261 } 1262 if (!modes[i]) 1263 can_clone = false; 1264 } 1265 1266 if (can_clone) { 1267 DRM_DEBUG_KMS("can clone using 1024x768\n"); 1268 return true; 1269 } 1270 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); 1271 return false; 1272 } 1273 1274 static bool drm_target_preferred(struct drm_fb_helper *fb_helper, 1275 struct drm_display_mode **modes, 1276 bool *enabled, int width, int height) 1277 { 1278 struct drm_fb_helper_connector *fb_helper_conn; 1279 int i; 1280 1281 for (i = 0; i < fb_helper->connector_count; i++) { 1282 fb_helper_conn = fb_helper->connector_info[i]; 1283 1284 if (enabled[i] == false) 1285 continue; 1286 1287 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", 1288 fb_helper_conn->connector->base.id); 1289 1290 /* got for command line mode first */ 1291 modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); 1292 if (!modes[i]) { 1293 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n", 1294 fb_helper_conn->connector->base.id); 1295 modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); 1296 } 1297 /* No preferred modes, pick one off the list */ 1298 if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { 1299 list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) 1300 break; 1301 } 1302 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : 1303 "none"); 1304 } 1305 return true; 1306 } 1307 1308 static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, 1309 struct drm_fb_helper_crtc **best_crtcs, 1310 struct drm_display_mode **modes, 1311 int n, int width, int height) 1312 { 1313 int c, o; 1314 struct drm_device *dev = fb_helper->dev; 1315 struct drm_connector *connector; 1316 struct drm_connector_helper_funcs *connector_funcs; 1317 struct drm_encoder *encoder; 1318 struct drm_fb_helper_crtc *best_crtc; 1319 int my_score, best_score, score; 1320 struct drm_fb_helper_crtc **crtcs, *crtc; 1321 struct drm_fb_helper_connector *fb_helper_conn; 1322 1323 if (n == fb_helper->connector_count) 1324 return 0; 1325 1326 fb_helper_conn = fb_helper->connector_info[n]; 1327 connector = fb_helper_conn->connector; 1328 1329 best_crtcs[n] = NULL; 1330 best_crtc = NULL; 1331 best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); 1332 if (modes[n] == NULL) 1333 return best_score; 1334 1335 crtcs = kzalloc(dev->mode_config.num_connector * 1336 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); 1337 if (!crtcs) 1338 return best_score; 1339 1340 my_score = 1; 1341 if (connector->status == connector_status_connected) 1342 my_score++; 1343 if (drm_has_cmdline_mode(fb_helper_conn)) 1344 my_score++; 1345 if (drm_has_preferred_mode(fb_helper_conn, width, height)) 1346 my_score++; 1347 1348 connector_funcs = connector->helper_private; 1349 encoder = connector_funcs->best_encoder(connector); 1350 if (!encoder) 1351 goto out; 1352 1353 /* select a crtc for this connector and then attempt to configure 1354 remaining connectors */ 1355 for (c = 0; c < fb_helper->crtc_count; c++) { 1356 crtc = &fb_helper->crtc_info[c]; 1357 1358 if ((encoder->possible_crtcs & (1 << c)) == 0) { 1359 continue; 1360 } 1361 1362 for (o = 0; o < n; o++) 1363 if (best_crtcs[o] == crtc) 1364 break; 1365 1366 if (o < n) { 1367 /* ignore cloning unless only a single crtc */ 1368 if (fb_helper->crtc_count > 1) 1369 continue; 1370 1371 if (!drm_mode_equal(modes[o], modes[n])) 1372 continue; 1373 } 1374 1375 crtcs[n] = crtc; 1376 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); 1377 score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, 1378 width, height); 1379 if (score > best_score) { 1380 best_crtc = crtc; 1381 best_score = score; 1382 memcpy(best_crtcs, crtcs, 1383 dev->mode_config.num_connector * 1384 sizeof(struct drm_fb_helper_crtc *)); 1385 } 1386 } 1387 out: 1388 kfree(crtcs); 1389 return best_score; 1390 } 1391 1392 static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) 1393 { 1394 struct drm_device *dev = fb_helper->dev; 1395 struct drm_fb_helper_crtc **crtcs; 1396 struct drm_display_mode **modes; 1397 struct drm_encoder *encoder; 1398 struct drm_mode_set *modeset; 1399 bool *enabled; 1400 int width, height; 1401 int i, ret; 1402 1403 DRM_DEBUG_KMS("\n"); 1404 1405 width = dev->mode_config.max_width; 1406 height = dev->mode_config.max_height; 1407 1408 /* clean out all the encoder/crtc combos */ 1409 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { 1410 encoder->crtc = NULL; 1411 } 1412 1413 crtcs = kcalloc(dev->mode_config.num_connector, 1414 sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); 1415 modes = kcalloc(dev->mode_config.num_connector, 1416 sizeof(struct drm_display_mode *), GFP_KERNEL); 1417 enabled = kcalloc(dev->mode_config.num_connector, 1418 sizeof(bool), GFP_KERNEL); 1419 1420 drm_enable_connectors(fb_helper, enabled); 1421 1422 ret = drm_target_cloned(fb_helper, modes, enabled, width, height); 1423 if (!ret) { 1424 ret = drm_target_preferred(fb_helper, modes, enabled, width, height); 1425 if (!ret) 1426 DRM_ERROR("Unable to find initial modes\n"); 1427 } 1428 1429 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height); 1430 1431 drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); 1432 1433 /* need to set the modesets up here for use later */ 1434 /* fill out the connector<->crtc mappings into the modesets */ 1435 for (i = 0; i < fb_helper->crtc_count; i++) { 1436 modeset = &fb_helper->crtc_info[i].mode_set; 1437 modeset->num_connectors = 0; 1438 } 1439 1440 for (i = 0; i < fb_helper->connector_count; i++) { 1441 struct drm_display_mode *mode = modes[i]; 1442 struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; 1443 modeset = &fb_crtc->mode_set; 1444 1445 if (mode && fb_crtc) { 1446 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n", 1447 mode->name, fb_crtc->mode_set.crtc->base.id); 1448 fb_crtc->desired_mode = mode; 1449 if (modeset->mode) 1450 drm_mode_destroy(dev, modeset->mode); 1451 modeset->mode = drm_mode_duplicate(dev, 1452 fb_crtc->desired_mode); 1453 modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; 1454 } 1455 } 1456 1457 kfree(crtcs); 1458 kfree(modes); 1459 kfree(enabled); 1460 } 1461 1462 /** 1463 * drm_helper_initial_config - setup a sane initial connector configuration 1464 * @dev: DRM device 1465 * 1466 * LOCKING: 1467 * Called at init time, must take mode config lock. 1468 * 1469 * Scan the CRTCs and connectors and try to put together an initial setup. 1470 * At the moment, this is a cloned configuration across all heads with 1471 * a new framebuffer object as the backing store. 1472 * 1473 * RETURNS: 1474 * Zero if everything went ok, nonzero otherwise. 1475 */ 1476 bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) 1477 { 1478 struct drm_device *dev = fb_helper->dev; 1479 int count = 0; 1480 1481 /* disable all the possible outputs/crtcs before entering KMS mode */ 1482 drm_helper_disable_unused_functions(fb_helper->dev); 1483 1484 drm_fb_helper_parse_command_line(fb_helper); 1485 1486 count = drm_fb_helper_probe_connector_modes(fb_helper, 1487 dev->mode_config.max_width, 1488 dev->mode_config.max_height); 1489 /* 1490 * we shouldn't end up with no modes here. 1491 */ 1492 if (count == 0) { 1493 printk(KERN_INFO "No connectors reported connected with modes\n"); 1494 } 1495 drm_setup_crtcs(fb_helper); 1496 1497 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); 1498 } 1499 EXPORT_SYMBOL(drm_fb_helper_initial_config); 1500 1501 bool drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) 1502 { 1503 int count = 0; 1504 u32 max_width, max_height, bpp_sel; 1505 bool bound = false, crtcs_bound = false; 1506 struct drm_crtc *crtc; 1507 1508 if (!fb_helper->fb) 1509 return false; 1510 1511 list_for_each_entry(crtc, &fb_helper->dev->mode_config.crtc_list, head) { 1512 if (crtc->fb) 1513 crtcs_bound = true; 1514 if (crtc->fb == fb_helper->fb) 1515 bound = true; 1516 } 1517 1518 if (!bound && crtcs_bound) { 1519 fb_helper->delayed_hotplug = true; 1520 return false; 1521 } 1522 DRM_DEBUG_KMS("\n"); 1523 1524 max_width = fb_helper->fb->width; 1525 max_height = fb_helper->fb->height; 1526 bpp_sel = fb_helper->fb->bits_per_pixel; 1527 1528 count = drm_fb_helper_probe_connector_modes(fb_helper, max_width, 1529 max_height); 1530 drm_setup_crtcs(fb_helper); 1531 1532 return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); 1533 } 1534 EXPORT_SYMBOL(drm_fb_helper_hotplug_event); 1535 1536 /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) 1537 * but the module doesn't depend on any fb console symbols. At least 1538 * attempt to load fbcon to avoid leaving the system without a usable console. 1539 */ 1540 #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) 1541 static int __init drm_fb_helper_modinit(void) 1542 { 1543 const char *name = "fbcon"; 1544 struct module *fbcon; 1545 1546 mutex_lock(&module_mutex); 1547 fbcon = find_module(name); 1548 mutex_unlock(&module_mutex); 1549 1550 if (!fbcon) 1551 request_module_nowait(name); 1552 return 0; 1553 } 1554 1555 module_init(drm_fb_helper_modinit); 1556 #endif 1557