nouveau_fbcon.c revision 1.11
1 /* $NetBSD: nouveau_fbcon.c,v 1.11 2021/08/07 16:19:17 thorpej Exp $ */ 2 3 /* 4 * Copyright 2007 David Airlie 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 23 * DEALINGS IN THE SOFTWARE. 24 * 25 * Authors: 26 * David Airlie 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: nouveau_fbcon.c,v 1.11 2021/08/07 16:19:17 thorpej Exp $"); 31 32 #include <linux/module.h> 33 #include <linux/kernel.h> 34 #include <linux/errno.h> 35 #include <linux/string.h> 36 #include <linux/mm.h> 37 #include <linux/tty.h> 38 #include <linux/sysrq.h> 39 #include <linux/delay.h> 40 #include <linux/fb.h> 41 #include <linux/init.h> 42 #include <linux/screen_info.h> 43 #include <linux/vga_switcheroo.h> 44 #include <linux/console.h> 45 46 #include <drm/drmP.h> 47 #include <drm/drm_crtc.h> 48 #include <drm/drm_crtc_helper.h> 49 #include <drm/drm_fb_helper.h> 50 51 #include "nouveau_drm.h" 52 #include "nouveau_gem.h" 53 #include "nouveau_bo.h" 54 #include "nouveau_fbcon.h" 55 #include "nouveau_chan.h" 56 57 #include "nouveau_crtc.h" 58 59 #ifdef __NetBSD__ 60 #include "nouveaufb.h" 61 #endif 62 63 #ifdef __NetBSD__ /* XXX nouveau fbaccel */ 64 int nouveau_nofbaccel = 1; 65 #else 66 MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration"); 67 int nouveau_nofbaccel = 0; 68 module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400); 69 70 static void 71 nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect) 72 { 73 struct nouveau_fbdev *fbcon = info->par; 74 struct nouveau_drm *drm = nouveau_drm(fbcon->dev); 75 struct nvif_device *device = &drm->device; 76 int ret; 77 78 if (info->state != FBINFO_STATE_RUNNING) 79 return; 80 81 ret = -ENODEV; 82 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) && 83 mutex_trylock(&drm->client.mutex)) { 84 if (device->info.family < NV_DEVICE_INFO_V0_TESLA) 85 ret = nv04_fbcon_fillrect(info, rect); 86 else 87 if (device->info.family < NV_DEVICE_INFO_V0_FERMI) 88 ret = nv50_fbcon_fillrect(info, rect); 89 else 90 ret = nvc0_fbcon_fillrect(info, rect); 91 mutex_unlock(&drm->client.mutex); 92 } 93 94 if (ret == 0) 95 return; 96 97 if (ret != -ENODEV) 98 nouveau_fbcon_gpu_lockup(info); 99 drm_fb_helper_cfb_fillrect(info, rect); 100 } 101 102 static void 103 nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image) 104 { 105 struct nouveau_fbdev *fbcon = info->par; 106 struct nouveau_drm *drm = nouveau_drm(fbcon->dev); 107 struct nvif_device *device = &drm->device; 108 int ret; 109 110 if (info->state != FBINFO_STATE_RUNNING) 111 return; 112 113 ret = -ENODEV; 114 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) && 115 mutex_trylock(&drm->client.mutex)) { 116 if (device->info.family < NV_DEVICE_INFO_V0_TESLA) 117 ret = nv04_fbcon_copyarea(info, image); 118 else 119 if (device->info.family < NV_DEVICE_INFO_V0_FERMI) 120 ret = nv50_fbcon_copyarea(info, image); 121 else 122 ret = nvc0_fbcon_copyarea(info, image); 123 mutex_unlock(&drm->client.mutex); 124 } 125 126 if (ret == 0) 127 return; 128 129 if (ret != -ENODEV) 130 nouveau_fbcon_gpu_lockup(info); 131 drm_fb_helper_cfb_copyarea(info, image); 132 } 133 134 static void 135 nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image) 136 { 137 struct nouveau_fbdev *fbcon = info->par; 138 struct nouveau_drm *drm = nouveau_drm(fbcon->dev); 139 struct nvif_device *device = &drm->device; 140 int ret; 141 142 if (info->state != FBINFO_STATE_RUNNING) 143 return; 144 145 ret = -ENODEV; 146 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) && 147 mutex_trylock(&drm->client.mutex)) { 148 if (device->info.family < NV_DEVICE_INFO_V0_TESLA) 149 ret = nv04_fbcon_imageblit(info, image); 150 else 151 if (device->info.family < NV_DEVICE_INFO_V0_FERMI) 152 ret = nv50_fbcon_imageblit(info, image); 153 else 154 ret = nvc0_fbcon_imageblit(info, image); 155 mutex_unlock(&drm->client.mutex); 156 } 157 158 if (ret == 0) 159 return; 160 161 if (ret != -ENODEV) 162 nouveau_fbcon_gpu_lockup(info); 163 drm_fb_helper_cfb_imageblit(info, image); 164 } 165 166 static int 167 nouveau_fbcon_sync(struct fb_info *info) 168 { 169 struct nouveau_fbdev *fbcon = info->par; 170 struct nouveau_drm *drm = nouveau_drm(fbcon->dev); 171 struct nouveau_channel *chan = drm->channel; 172 int ret; 173 174 if (!chan || !chan->accel_done || in_interrupt() || 175 info->state != FBINFO_STATE_RUNNING || 176 info->flags & FBINFO_HWACCEL_DISABLED) 177 return 0; 178 179 if (!mutex_trylock(&drm->client.mutex)) 180 return 0; 181 182 ret = nouveau_channel_idle(chan); 183 mutex_unlock(&drm->client.mutex); 184 if (ret) { 185 nouveau_fbcon_gpu_lockup(info); 186 return 0; 187 } 188 189 chan->accel_done = false; 190 return 0; 191 } 192 193 static int 194 nouveau_fbcon_open(struct fb_info *info, int user) 195 { 196 struct nouveau_fbdev *fbcon = info->par; 197 struct nouveau_drm *drm = nouveau_drm(fbcon->dev); 198 int ret = pm_runtime_get_sync(drm->dev->dev); 199 if (ret < 0 && ret != -EACCES) 200 return ret; 201 return 0; 202 } 203 204 static int 205 nouveau_fbcon_release(struct fb_info *info, int user) 206 { 207 struct nouveau_fbdev *fbcon = info->par; 208 struct nouveau_drm *drm = nouveau_drm(fbcon->dev); 209 pm_runtime_put(drm->dev->dev); 210 return 0; 211 } 212 213 static struct fb_ops nouveau_fbcon_ops = { 214 .owner = THIS_MODULE, 215 .fb_open = nouveau_fbcon_open, 216 .fb_release = nouveau_fbcon_release, 217 .fb_check_var = drm_fb_helper_check_var, 218 .fb_set_par = drm_fb_helper_set_par, 219 .fb_fillrect = nouveau_fbcon_fillrect, 220 .fb_copyarea = nouveau_fbcon_copyarea, 221 .fb_imageblit = nouveau_fbcon_imageblit, 222 .fb_sync = nouveau_fbcon_sync, 223 .fb_pan_display = drm_fb_helper_pan_display, 224 .fb_blank = drm_fb_helper_blank, 225 .fb_setcmap = drm_fb_helper_setcmap, 226 .fb_debug_enter = drm_fb_helper_debug_enter, 227 .fb_debug_leave = drm_fb_helper_debug_leave, 228 }; 229 230 static struct fb_ops nouveau_fbcon_sw_ops = { 231 .owner = THIS_MODULE, 232 .fb_open = nouveau_fbcon_open, 233 .fb_release = nouveau_fbcon_release, 234 .fb_check_var = drm_fb_helper_check_var, 235 .fb_set_par = drm_fb_helper_set_par, 236 .fb_fillrect = drm_fb_helper_cfb_fillrect, 237 .fb_copyarea = drm_fb_helper_cfb_copyarea, 238 .fb_imageblit = drm_fb_helper_cfb_imageblit, 239 .fb_pan_display = drm_fb_helper_pan_display, 240 .fb_blank = drm_fb_helper_blank, 241 .fb_setcmap = drm_fb_helper_setcmap, 242 .fb_debug_enter = drm_fb_helper_debug_enter, 243 .fb_debug_leave = drm_fb_helper_debug_leave, 244 }; 245 #endif /* XXX nouveau fbaccel */ 246 247 void 248 nouveau_fbcon_accel_save_disable(struct drm_device *dev) 249 { 250 #ifndef __NetBSD__ /* XXX nouveau fbaccel */ 251 struct nouveau_drm *drm = nouveau_drm(dev); 252 if (drm->fbcon) { 253 drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags; 254 drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED; 255 } 256 #endif 257 } 258 259 void 260 nouveau_fbcon_accel_restore(struct drm_device *dev) 261 { 262 #ifndef __NetBSD__ /* XXX nouveau fbaccel */ 263 struct nouveau_drm *drm = nouveau_drm(dev); 264 if (drm->fbcon) { 265 drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags; 266 } 267 #endif 268 } 269 270 static void 271 nouveau_fbcon_accel_fini(struct drm_device *dev) 272 { 273 struct nouveau_drm *drm = nouveau_drm(dev); 274 struct nouveau_fbdev *fbcon = drm->fbcon; 275 if (fbcon && drm->channel) { 276 console_lock(); 277 #ifndef __NetBSD__ /* XXX nouveau fbaccel */ 278 fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED; 279 #endif 280 console_unlock(); 281 nouveau_channel_idle(drm->channel); 282 nvif_object_fini(&fbcon->twod); 283 nvif_object_fini(&fbcon->blit); 284 nvif_object_fini(&fbcon->gdi); 285 nvif_object_fini(&fbcon->patt); 286 nvif_object_fini(&fbcon->rop); 287 nvif_object_fini(&fbcon->clip); 288 nvif_object_fini(&fbcon->surf2d); 289 } 290 } 291 292 #ifndef __NetBSD__ /* XXX nouveau fbaccel */ 293 static void 294 nouveau_fbcon_accel_init(struct drm_device *dev) 295 { 296 struct nouveau_drm *drm = nouveau_drm(dev); 297 struct nouveau_fbdev *fbcon = drm->fbcon; 298 struct fb_info *info = fbcon->helper.fbdev; 299 int ret; 300 301 if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA) 302 ret = nv04_fbcon_accel_init(info); 303 else 304 if (drm->device.info.family < NV_DEVICE_INFO_V0_FERMI) 305 ret = nv50_fbcon_accel_init(info); 306 else 307 ret = nvc0_fbcon_accel_init(info); 308 309 if (ret == 0) 310 info->fbops = &nouveau_fbcon_ops; 311 } 312 #endif 313 314 static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, 315 u16 blue, int regno) 316 { 317 struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc); 318 319 nv_crtc->lut.r[regno] = red; 320 nv_crtc->lut.g[regno] = green; 321 nv_crtc->lut.b[regno] = blue; 322 } 323 324 static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, 325 u16 *blue, int regno) 326 { 327 struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc); 328 329 *red = nv_crtc->lut.r[regno]; 330 *green = nv_crtc->lut.g[regno]; 331 *blue = nv_crtc->lut.b[regno]; 332 } 333 334 static void 335 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon) 336 { 337 #ifdef __NetBSD__ /* XXX nouveau fbaccel */ 338 struct nouveau_bo *const nvbo = fbcon->nouveau_fb.nvbo; 339 340 (void)memset(__UNVOLATILE(nvbo_kmap_obj_iovirtual(nvbo)), 0, 341 nvbo->bo.num_pages << PAGE_SHIFT); 342 #else 343 struct fb_info *info = fbcon->helper.fbdev; 344 struct fb_fillrect rect; 345 346 /* Clear the entire fbcon. The drm will program every connector 347 * with it's preferred mode. If the sizes differ, one display will 348 * quite likely have garbage around the console. 349 */ 350 rect.dx = rect.dy = 0; 351 rect.width = info->var.xres_virtual; 352 rect.height = info->var.yres_virtual; 353 rect.color = 0; 354 rect.rop = ROP_COPY; 355 info->fbops->fb_fillrect(info, &rect); 356 #endif 357 } 358 359 #ifdef __NetBSD__ 360 static int 361 nouveau_fbcon_print(void *aux, const char *pnp) 362 { 363 if (pnp) 364 aprint_normal("nouveaufbbus at %s", pnp); 365 366 return (UNCONF); 367 } 368 #endif 369 370 static int 371 nouveau_fbcon_create(struct drm_fb_helper *helper, 372 struct drm_fb_helper_surface_size *sizes) 373 { 374 struct nouveau_fbdev *fbcon = 375 container_of(helper, struct nouveau_fbdev, helper); 376 struct drm_device *dev = fbcon->dev; 377 struct nouveau_drm *drm = nouveau_drm(dev); 378 struct nvif_device *device = &drm->device; 379 #ifndef __NetBSD__ 380 struct fb_info *info; 381 #endif 382 struct drm_framebuffer *fb; 383 struct nouveau_framebuffer *nouveau_fb; 384 struct nouveau_channel *chan; 385 struct nouveau_bo *nvbo; 386 struct drm_mode_fb_cmd2 mode_cmd; 387 int size, ret; 388 389 mode_cmd.width = sizes->surface_width; 390 mode_cmd.height = sizes->surface_height; 391 392 mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3); 393 mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256); 394 395 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 396 sizes->surface_depth); 397 398 size = mode_cmd.pitches[0] * mode_cmd.height; 399 size = roundup(size, PAGE_SIZE); 400 401 ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM, 402 0, 0x0000, &nvbo); 403 if (ret) { 404 NV_ERROR(drm, "failed to allocate framebuffer\n"); 405 goto out; 406 } 407 408 ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM, false); 409 if (ret) { 410 NV_ERROR(drm, "failed to pin fb: %d\n", ret); 411 goto out_unref; 412 } 413 414 ret = nouveau_bo_map(nvbo); 415 if (ret) { 416 NV_ERROR(drm, "failed to map fb: %d\n", ret); 417 goto out_unpin; 418 } 419 420 chan = nouveau_nofbaccel ? NULL : drm->channel; 421 if (chan && device->info.family >= NV_DEVICE_INFO_V0_TESLA) { 422 ret = nouveau_bo_vma_add(nvbo, drm->client.vm, 423 &fbcon->nouveau_fb.vma); 424 if (ret) { 425 NV_ERROR(drm, "failed to map fb into chan: %d\n", ret); 426 chan = NULL; 427 } 428 } 429 430 #ifdef __NetBSD__ 431 nouveau_framebuffer_init(dev, &fbcon->nouveau_fb, &mode_cmd, nvbo); 432 nouveau_fb = &fbcon->nouveau_fb; 433 fb = &nouveau_fb->base; 434 435 nouveau_fbcon_zfill(dev, fbcon); 436 437 struct nouveaufb_attach_args nfa; 438 439 memset(&nfa, 0, sizeof(nfa)); 440 nfa.nfa_fb_helper = helper; 441 nfa.nfa_fb_sizes = *sizes; 442 nfa.nfa_fb_ptr = nvbo_kmap_obj_iovirtual(nvbo); 443 nfa.nfa_fb_linebytes = mode_cmd.pitches[0]; 444 445 helper->fbdev = config_found(dev->dev, &nfa, nouveau_fbcon_print, 446 CFARGS(.iattr = "nouveaufbbus")); 447 if (helper->fbdev == NULL) { 448 goto out_unlock; 449 } 450 451 helper->fb = fb; 452 453 return 0; 454 #else 455 mutex_lock(&dev->struct_mutex); 456 457 info = drm_fb_helper_alloc_fbi(helper); 458 if (IS_ERR(info)) { 459 ret = PTR_ERR(info); 460 goto out_unlock; 461 } 462 info->skip_vt_switch = 1; 463 464 info->par = fbcon; 465 466 nouveau_framebuffer_init(dev, &fbcon->nouveau_fb, &mode_cmd, nvbo); 467 468 nouveau_fb = &fbcon->nouveau_fb; 469 fb = &nouveau_fb->base; 470 471 /* setup helper */ 472 fbcon->helper.fb = fb; 473 474 strcpy(info->fix.id, "nouveaufb"); 475 if (!chan) 476 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED; 477 else 478 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA | 479 FBINFO_HWACCEL_FILLRECT | 480 FBINFO_HWACCEL_IMAGEBLIT; 481 info->flags |= FBINFO_CAN_FORCE_OUTPUT; 482 info->fbops = &nouveau_fbcon_sw_ops; 483 info->fix.smem_start = nvbo->bo.mem.bus.base + 484 nvbo->bo.mem.bus.offset; 485 info->fix.smem_len = size; 486 487 info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo); 488 info->screen_size = size; 489 490 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth); 491 drm_fb_helper_fill_var(info, &fbcon->helper, sizes->fb_width, sizes->fb_height); 492 493 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 494 495 mutex_unlock(&dev->struct_mutex); 496 497 if (chan) 498 nouveau_fbcon_accel_init(dev); 499 nouveau_fbcon_zfill(dev, fbcon); 500 501 /* To allow resizeing without swapping buffers */ 502 NV_INFO(drm, "allocated %dx%d fb: 0x%jx, bo %p\n", 503 nouveau_fb->base.width, nouveau_fb->base.height, 504 (uintmax_t)nvbo->bo.offset, nvbo); 505 506 vga_switcheroo_client_fb_set(dev->pdev, info); 507 return 0; 508 #endif /* defined(__NetBSD__) */ 509 510 out_unlock: 511 #ifndef __NetBSD__ 512 mutex_unlock(&dev->struct_mutex); 513 #endif 514 if (chan) 515 nouveau_bo_vma_del(nvbo, &fbcon->nouveau_fb.vma); 516 nouveau_bo_unmap(nvbo); 517 out_unpin: 518 nouveau_bo_unpin(nvbo); 519 out_unref: 520 nouveau_gem_object_del(&nvbo->gem); 521 out: 522 return ret; 523 } 524 525 void 526 nouveau_fbcon_output_poll_changed(struct drm_device *dev) 527 { 528 struct nouveau_drm *drm = nouveau_drm(dev); 529 if (drm->fbcon) 530 drm_fb_helper_hotplug_event(&drm->fbcon->helper); 531 } 532 533 static int 534 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon) 535 { 536 struct nouveau_framebuffer *nouveau_fb = &fbcon->nouveau_fb; 537 538 #ifdef __NetBSD__ 539 if (fbcon->helper.fbdev) { 540 int ret; 541 542 /* XXX errno NetBSD->Linux */ 543 ret = -config_detach(fbcon->helper.fbdev, DETACH_FORCE); 544 if (ret) 545 DRM_ERROR("failed to detach nouveaufb: %d\n", ret); 546 fbcon->helper.fbdev = NULL; 547 } 548 #else 549 drm_fb_helper_unregister_fbi(&fbcon->helper); 550 drm_fb_helper_release_fbi(&fbcon->helper); 551 #endif 552 553 if (nouveau_fb->nvbo) { 554 nouveau_bo_unmap(nouveau_fb->nvbo); 555 nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma); 556 nouveau_bo_unpin(nouveau_fb->nvbo); 557 drm_gem_object_unreference_unlocked(&nouveau_fb->nvbo->gem); 558 nouveau_fb->nvbo = NULL; 559 } 560 drm_fb_helper_fini(&fbcon->helper); 561 drm_framebuffer_unregister_private(&nouveau_fb->base); 562 drm_framebuffer_cleanup(&nouveau_fb->base); 563 return 0; 564 } 565 566 #ifndef __NetBSD__ /* XXX nouveau fbaccel */ 567 void nouveau_fbcon_gpu_lockup(struct fb_info *info) 568 { 569 struct nouveau_fbdev *fbcon = info->par; 570 struct nouveau_drm *drm = nouveau_drm(fbcon->dev); 571 572 NV_ERROR(drm, "GPU lockup - switching to software fbcon\n"); 573 info->flags |= FBINFO_HWACCEL_DISABLED; 574 } 575 #endif 576 577 static const struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = { 578 .gamma_set = nouveau_fbcon_gamma_set, 579 .gamma_get = nouveau_fbcon_gamma_get, 580 .fb_probe = nouveau_fbcon_create, 581 }; 582 583 void 584 nouveau_fbcon_set_suspend(struct drm_device *dev, int state) 585 { 586 struct nouveau_drm *drm = nouveau_drm(dev); 587 if (drm->fbcon) { 588 console_lock(); 589 if (state == FBINFO_STATE_RUNNING) 590 nouveau_fbcon_accel_restore(dev); 591 drm_fb_helper_set_suspend(&drm->fbcon->helper, state); 592 if (state != FBINFO_STATE_RUNNING) 593 nouveau_fbcon_accel_save_disable(dev); 594 console_unlock(); 595 } 596 } 597 598 int 599 nouveau_fbcon_init(struct drm_device *dev) 600 { 601 struct nouveau_drm *drm = nouveau_drm(dev); 602 struct nouveau_fbdev *fbcon; 603 int preferred_bpp; 604 int ret; 605 606 if (!dev->mode_config.num_crtc || 607 (dev->pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA) 608 return 0; 609 610 fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL); 611 if (!fbcon) 612 return -ENOMEM; 613 614 fbcon->dev = dev; 615 drm->fbcon = fbcon; 616 617 drm_fb_helper_prepare(dev, &fbcon->helper, &nouveau_fbcon_helper_funcs); 618 619 ret = drm_fb_helper_init(dev, &fbcon->helper, 620 dev->mode_config.num_crtc, 4); 621 if (ret) 622 goto free; 623 624 ret = drm_fb_helper_single_add_all_connectors(&fbcon->helper); 625 if (ret) 626 goto fini; 627 628 if (drm->device.info.ram_size <= 32 * 1024 * 1024) 629 preferred_bpp = 8; 630 else 631 if (drm->device.info.ram_size <= 64 * 1024 * 1024) 632 preferred_bpp = 16; 633 else 634 preferred_bpp = 32; 635 636 /* disable all the possible outputs/crtcs before entering KMS mode */ 637 drm_helper_disable_unused_functions(dev); 638 639 ret = drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp); 640 if (ret) 641 goto fini; 642 643 #ifndef __NetBSD__ 644 if (fbcon->helper.fbdev) 645 fbcon->helper.fbdev->pixmap.buf_align = 4; 646 #endif 647 return 0; 648 649 fini: 650 drm_fb_helper_fini(&fbcon->helper); 651 free: 652 kfree(fbcon); 653 return ret; 654 } 655 656 void 657 nouveau_fbcon_fini(struct drm_device *dev) 658 { 659 struct nouveau_drm *drm = nouveau_drm(dev); 660 661 if (!drm->fbcon) 662 return; 663 664 nouveau_fbcon_accel_fini(dev); 665 nouveau_fbcon_destroy(dev, drm->fbcon); 666 kfree(drm->fbcon); 667 drm->fbcon = NULL; 668 } 669
Indexes created Mon Oct 20 20:10:13 GMT 2025