1 // SPDX-License-Identifier: GPL-2.0-only 2 /************************************************************************** 3 * Copyright (c) 2007-2011, Intel Corporation. 4 * All Rights Reserved. 5 * 6 **************************************************************************/ 7 8 #include <linux/console.h> 9 #include <linux/delay.h> 10 #include <linux/errno.h> 11 #include <linux/init.h> 12 #include <linux/kernel.h> 13 #include <linux/mm.h> 14 #include <linux/module.h> 15 #include <linux/pfn_t.h> 16 #include <linux/slab.h> 17 #include <linux/string.h> 18 #include <linux/tty.h> 19 20 #include <drm/drm.h> 21 #include <drm/drm_crtc.h> 22 #include <drm/drm_fb_helper.h> 23 #include <drm/drm_fourcc.h> 24 #include <drm/drm_gem_framebuffer_helper.h> 25 26 #include "framebuffer.h" 27 #include "gtt.h" 28 #include "psb_drv.h" 29 #include "psb_intel_drv.h" 30 #include "psb_intel_reg.h" 31 32 static const struct drm_framebuffer_funcs psb_fb_funcs = { 33 .destroy = drm_gem_fb_destroy, 34 .create_handle = drm_gem_fb_create_handle, 35 }; 36 37 #define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16) 38 39 static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green, 40 unsigned blue, unsigned transp, 41 struct fb_info *info) 42 { 43 struct psb_fbdev *fbdev = info->par; 44 struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb; 45 uint32_t v; 46 47 if (!fb) 48 return -ENOMEM; 49 50 if (regno > 255) 51 return 1; 52 53 red = CMAP_TOHW(red, info->var.red.length); 54 blue = CMAP_TOHW(blue, info->var.blue.length); 55 green = CMAP_TOHW(green, info->var.green.length); 56 transp = CMAP_TOHW(transp, info->var.transp.length); 57 58 v = (red << info->var.red.offset) | 59 (green << info->var.green.offset) | 60 (blue << info->var.blue.offset) | 61 (transp << info->var.transp.offset); 62 63 if (regno < 16) { 64 switch (fb->format->cpp[0] * 8) { 65 case 16: 66 ((uint32_t *) info->pseudo_palette)[regno] = v; 67 break; 68 case 24: 69 case 32: 70 ((uint32_t *) info->pseudo_palette)[regno] = v; 71 break; 72 } 73 } 74 75 return 0; 76 } 77 78 static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info) 79 { 80 struct psb_fbdev *fbdev = info->par; 81 struct psb_framebuffer *psbfb = &fbdev->pfb; 82 struct drm_device *dev = psbfb->base.dev; 83 struct gtt_range *gtt = to_gtt_range(psbfb->base.obj[0]); 84 85 /* 86 * We have to poke our nose in here. The core fb code assumes 87 * panning is part of the hardware that can be invoked before 88 * the actual fb is mapped. In our case that isn't quite true. 89 */ 90 if (gtt->npage) { 91 /* GTT roll shifts in 4K pages, we need to shift the right 92 number of pages */ 93 int pages = info->fix.line_length >> 12; 94 psb_gtt_roll(dev, gtt, var->yoffset * pages); 95 } 96 return 0; 97 } 98 99 static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf) 100 { 101 struct vm_area_struct *vma = vmf->vma; 102 struct psb_framebuffer *psbfb = vma->vm_private_data; 103 struct drm_device *dev = psbfb->base.dev; 104 struct drm_psb_private *dev_priv = dev->dev_private; 105 struct gtt_range *gtt = to_gtt_range(psbfb->base.obj[0]); 106 int page_num; 107 int i; 108 unsigned long address; 109 vm_fault_t ret = VM_FAULT_SIGBUS; 110 unsigned long pfn; 111 unsigned long phys_addr = (unsigned long)dev_priv->stolen_base + 112 gtt->offset; 113 114 page_num = vma_pages(vma); 115 address = vmf->address - (vmf->pgoff << PAGE_SHIFT); 116 117 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 118 119 for (i = 0; i < page_num; i++) { 120 pfn = (phys_addr >> PAGE_SHIFT); 121 122 ret = vmf_insert_mixed(vma, address, 123 __pfn_to_pfn_t(pfn, PFN_DEV)); 124 if (unlikely(ret & VM_FAULT_ERROR)) 125 break; 126 address += PAGE_SIZE; 127 phys_addr += PAGE_SIZE; 128 } 129 return ret; 130 } 131 132 static void psbfb_vm_open(struct vm_area_struct *vma) 133 { 134 } 135 136 static void psbfb_vm_close(struct vm_area_struct *vma) 137 { 138 } 139 140 static const struct vm_operations_struct psbfb_vm_ops = { 141 .fault = psbfb_vm_fault, 142 .open = psbfb_vm_open, 143 .close = psbfb_vm_close 144 }; 145 146 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma) 147 { 148 struct psb_fbdev *fbdev = info->par; 149 struct psb_framebuffer *psbfb = &fbdev->pfb; 150 151 if (vma->vm_pgoff != 0) 152 return -EINVAL; 153 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) 154 return -EINVAL; 155 156 if (!psbfb->addr_space) 157 psbfb->addr_space = vma->vm_file->f_mapping; 158 /* 159 * If this is a GEM object then info->screen_base is the virtual 160 * kernel remapping of the object. FIXME: Review if this is 161 * suitable for our mmap work 162 */ 163 vma->vm_ops = &psbfb_vm_ops; 164 vma->vm_private_data = (void *)psbfb; 165 vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP; 166 return 0; 167 } 168 169 static struct fb_ops psbfb_ops = { 170 .owner = THIS_MODULE, 171 DRM_FB_HELPER_DEFAULT_OPS, 172 .fb_setcolreg = psbfb_setcolreg, 173 .fb_fillrect = drm_fb_helper_cfb_fillrect, 174 .fb_copyarea = psbfb_copyarea, 175 .fb_imageblit = drm_fb_helper_cfb_imageblit, 176 .fb_mmap = psbfb_mmap, 177 .fb_sync = psbfb_sync, 178 }; 179 180 static struct fb_ops psbfb_roll_ops = { 181 .owner = THIS_MODULE, 182 DRM_FB_HELPER_DEFAULT_OPS, 183 .fb_setcolreg = psbfb_setcolreg, 184 .fb_fillrect = drm_fb_helper_cfb_fillrect, 185 .fb_copyarea = drm_fb_helper_cfb_copyarea, 186 .fb_imageblit = drm_fb_helper_cfb_imageblit, 187 .fb_pan_display = psbfb_pan, 188 .fb_mmap = psbfb_mmap, 189 }; 190 191 static struct fb_ops psbfb_unaccel_ops = { 192 .owner = THIS_MODULE, 193 DRM_FB_HELPER_DEFAULT_OPS, 194 .fb_setcolreg = psbfb_setcolreg, 195 .fb_fillrect = drm_fb_helper_cfb_fillrect, 196 .fb_copyarea = drm_fb_helper_cfb_copyarea, 197 .fb_imageblit = drm_fb_helper_cfb_imageblit, 198 .fb_mmap = psbfb_mmap, 199 }; 200 201 /** 202 * psb_framebuffer_init - initialize a framebuffer 203 * @dev: our DRM device 204 * @fb: framebuffer to set up 205 * @mode_cmd: mode description 206 * @gt: backing object 207 * 208 * Configure and fill in the boilerplate for our frame buffer. Return 209 * 0 on success or an error code if we fail. 210 */ 211 static int psb_framebuffer_init(struct drm_device *dev, 212 struct psb_framebuffer *fb, 213 const struct drm_mode_fb_cmd2 *mode_cmd, 214 struct gtt_range *gt) 215 { 216 const struct drm_format_info *info; 217 int ret; 218 219 /* 220 * Reject unknown formats, YUV formats, and formats with more than 221 * 4 bytes per pixel. 222 */ 223 info = drm_get_format_info(dev, mode_cmd); 224 if (!info || !info->depth || info->cpp[0] > 4) 225 return -EINVAL; 226 227 if (mode_cmd->pitches[0] & 63) 228 return -EINVAL; 229 230 drm_helper_mode_fill_fb_struct(dev, &fb->base, mode_cmd); 231 fb->base.obj[0] = >->gem; 232 ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs); 233 if (ret) { 234 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 235 return ret; 236 } 237 return 0; 238 } 239 240 /** 241 * psb_framebuffer_create - create a framebuffer backed by gt 242 * @dev: our DRM device 243 * @mode_cmd: the description of the requested mode 244 * @gt: the backing object 245 * 246 * Create a framebuffer object backed by the gt, and fill in the 247 * boilerplate required 248 * 249 * TODO: review object references 250 */ 251 252 static struct drm_framebuffer *psb_framebuffer_create 253 (struct drm_device *dev, 254 const struct drm_mode_fb_cmd2 *mode_cmd, 255 struct gtt_range *gt) 256 { 257 struct psb_framebuffer *fb; 258 int ret; 259 260 fb = kzalloc(sizeof(*fb), GFP_KERNEL); 261 if (!fb) 262 return ERR_PTR(-ENOMEM); 263 264 ret = psb_framebuffer_init(dev, fb, mode_cmd, gt); 265 if (ret) { 266 kfree(fb); 267 return ERR_PTR(ret); 268 } 269 return &fb->base; 270 } 271 272 /** 273 * psbfb_alloc - allocate frame buffer memory 274 * @dev: the DRM device 275 * @aligned_size: space needed 276 * 277 * Allocate the frame buffer. In the usual case we get a GTT range that 278 * is stolen memory backed and life is simple. If there isn't sufficient 279 * we fail as we don't have the virtual mapping space to really vmap it 280 * and the kernel console code can't handle non linear framebuffers. 281 * 282 * Re-address this as and if the framebuffer layer grows this ability. 283 */ 284 static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size) 285 { 286 struct gtt_range *backing; 287 /* Begin by trying to use stolen memory backing */ 288 backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1, PAGE_SIZE); 289 if (backing) { 290 drm_gem_private_object_init(dev, &backing->gem, aligned_size); 291 return backing; 292 } 293 return NULL; 294 } 295 296 /** 297 * psbfb_create - create a framebuffer 298 * @fbdev: the framebuffer device 299 * @sizes: specification of the layout 300 * 301 * Create a framebuffer to the specifications provided 302 */ 303 static int psbfb_create(struct psb_fbdev *fbdev, 304 struct drm_fb_helper_surface_size *sizes) 305 { 306 struct drm_device *dev = fbdev->psb_fb_helper.dev; 307 struct drm_psb_private *dev_priv = dev->dev_private; 308 struct fb_info *info; 309 struct drm_framebuffer *fb; 310 struct psb_framebuffer *psbfb = &fbdev->pfb; 311 struct drm_mode_fb_cmd2 mode_cmd; 312 int size; 313 int ret; 314 struct gtt_range *backing; 315 u32 bpp, depth; 316 int gtt_roll = 0; 317 int pitch_lines = 0; 318 319 mode_cmd.width = sizes->surface_width; 320 mode_cmd.height = sizes->surface_height; 321 bpp = sizes->surface_bpp; 322 depth = sizes->surface_depth; 323 324 /* No 24bit packed */ 325 if (bpp == 24) 326 bpp = 32; 327 328 do { 329 /* 330 * Acceleration via the GTT requires pitch to be 331 * power of two aligned. Preferably page but less 332 * is ok with some fonts 333 */ 334 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines); 335 336 size = mode_cmd.pitches[0] * mode_cmd.height; 337 size = ALIGN(size, PAGE_SIZE); 338 339 /* Allocate the fb in the GTT with stolen page backing */ 340 backing = psbfb_alloc(dev, size); 341 342 if (pitch_lines) 343 pitch_lines *= 2; 344 else 345 pitch_lines = 1; 346 gtt_roll++; 347 } while (backing == NULL && pitch_lines <= 16); 348 349 /* The final pitch we accepted if we succeeded */ 350 pitch_lines /= 2; 351 352 if (backing == NULL) { 353 /* 354 * We couldn't get the space we wanted, fall back to the 355 * display engine requirement instead. The HW requires 356 * the pitch to be 64 byte aligned 357 */ 358 359 gtt_roll = 0; /* Don't use GTT accelerated scrolling */ 360 pitch_lines = 64; 361 362 mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64); 363 364 size = mode_cmd.pitches[0] * mode_cmd.height; 365 size = ALIGN(size, PAGE_SIZE); 366 367 /* Allocate the framebuffer in the GTT with stolen page backing */ 368 backing = psbfb_alloc(dev, size); 369 if (backing == NULL) 370 return -ENOMEM; 371 } 372 373 memset(dev_priv->vram_addr + backing->offset, 0, size); 374 375 info = drm_fb_helper_alloc_fbi(&fbdev->psb_fb_helper); 376 if (IS_ERR(info)) { 377 ret = PTR_ERR(info); 378 goto out; 379 } 380 381 mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth); 382 383 ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing); 384 if (ret) 385 goto out; 386 387 fb = &psbfb->base; 388 psbfb->fbdev = info; 389 390 fbdev->psb_fb_helper.fb = fb; 391 392 if (dev_priv->ops->accel_2d && pitch_lines > 8) /* 2D engine */ 393 info->fbops = &psbfb_ops; 394 else if (gtt_roll) { /* GTT rolling seems best */ 395 info->fbops = &psbfb_roll_ops; 396 info->flags |= FBINFO_HWACCEL_YPAN; 397 } else /* Software */ 398 info->fbops = &psbfb_unaccel_ops; 399 400 info->fix.smem_start = dev->mode_config.fb_base; 401 info->fix.smem_len = size; 402 info->fix.ywrapstep = gtt_roll; 403 info->fix.ypanstep = 0; 404 405 /* Accessed stolen memory directly */ 406 info->screen_base = dev_priv->vram_addr + backing->offset; 407 info->screen_size = size; 408 409 if (dev_priv->gtt.stolen_size) { 410 info->apertures->ranges[0].base = dev->mode_config.fb_base; 411 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size; 412 } 413 414 drm_fb_helper_fill_info(info, &fbdev->psb_fb_helper, sizes); 415 416 info->fix.mmio_start = pci_resource_start(dev->pdev, 0); 417 info->fix.mmio_len = pci_resource_len(dev->pdev, 0); 418 419 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */ 420 421 dev_dbg(dev->dev, "allocated %dx%d fb\n", 422 psbfb->base.width, psbfb->base.height); 423 424 return 0; 425 out: 426 psb_gtt_free_range(dev, backing); 427 return ret; 428 } 429 430 /** 431 * psb_user_framebuffer_create - create framebuffer 432 * @dev: our DRM device 433 * @filp: client file 434 * @cmd: mode request 435 * 436 * Create a new framebuffer backed by a userspace GEM object 437 */ 438 static struct drm_framebuffer *psb_user_framebuffer_create 439 (struct drm_device *dev, struct drm_file *filp, 440 const struct drm_mode_fb_cmd2 *cmd) 441 { 442 struct gtt_range *r; 443 struct drm_gem_object *obj; 444 445 /* 446 * Find the GEM object and thus the gtt range object that is 447 * to back this space 448 */ 449 obj = drm_gem_object_lookup(filp, cmd->handles[0]); 450 if (obj == NULL) 451 return ERR_PTR(-ENOENT); 452 453 /* Let the core code do all the work */ 454 r = container_of(obj, struct gtt_range, gem); 455 return psb_framebuffer_create(dev, cmd, r); 456 } 457 458 static int psbfb_probe(struct drm_fb_helper *helper, 459 struct drm_fb_helper_surface_size *sizes) 460 { 461 struct psb_fbdev *psb_fbdev = 462 container_of(helper, struct psb_fbdev, psb_fb_helper); 463 struct drm_device *dev = psb_fbdev->psb_fb_helper.dev; 464 struct drm_psb_private *dev_priv = dev->dev_private; 465 int bytespp; 466 467 bytespp = sizes->surface_bpp / 8; 468 if (bytespp == 3) /* no 24bit packed */ 469 bytespp = 4; 470 471 /* If the mode will not fit in 32bit then switch to 16bit to get 472 a console on full resolution. The X mode setting server will 473 allocate its own 32bit GEM framebuffer */ 474 if (ALIGN(sizes->fb_width * bytespp, 64) * sizes->fb_height > 475 dev_priv->vram_stolen_size) { 476 sizes->surface_bpp = 16; 477 sizes->surface_depth = 16; 478 } 479 480 return psbfb_create(psb_fbdev, sizes); 481 } 482 483 static const struct drm_fb_helper_funcs psb_fb_helper_funcs = { 484 .fb_probe = psbfb_probe, 485 }; 486 487 static int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev) 488 { 489 struct psb_framebuffer *psbfb = &fbdev->pfb; 490 491 drm_fb_helper_unregister_fbi(&fbdev->psb_fb_helper); 492 493 drm_fb_helper_fini(&fbdev->psb_fb_helper); 494 drm_framebuffer_unregister_private(&psbfb->base); 495 drm_framebuffer_cleanup(&psbfb->base); 496 497 if (psbfb->base.obj[0]) 498 drm_gem_object_put_unlocked(psbfb->base.obj[0]); 499 return 0; 500 } 501 502 int psb_fbdev_init(struct drm_device *dev) 503 { 504 struct psb_fbdev *fbdev; 505 struct drm_psb_private *dev_priv = dev->dev_private; 506 int ret; 507 508 fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL); 509 if (!fbdev) { 510 dev_err(dev->dev, "no memory\n"); 511 return -ENOMEM; 512 } 513 514 dev_priv->fbdev = fbdev; 515 516 drm_fb_helper_prepare(dev, &fbdev->psb_fb_helper, &psb_fb_helper_funcs); 517 518 ret = drm_fb_helper_init(dev, &fbdev->psb_fb_helper, 519 INTELFB_CONN_LIMIT); 520 if (ret) 521 goto free; 522 523 ret = drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper); 524 if (ret) 525 goto fini; 526 527 /* disable all the possible outputs/crtcs before entering KMS mode */ 528 drm_helper_disable_unused_functions(dev); 529 530 ret = drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32); 531 if (ret) 532 goto fini; 533 534 return 0; 535 536 fini: 537 drm_fb_helper_fini(&fbdev->psb_fb_helper); 538 free: 539 kfree(fbdev); 540 return ret; 541 } 542 543 static void psb_fbdev_fini(struct drm_device *dev) 544 { 545 struct drm_psb_private *dev_priv = dev->dev_private; 546 547 if (!dev_priv->fbdev) 548 return; 549 550 psb_fbdev_destroy(dev, dev_priv->fbdev); 551 kfree(dev_priv->fbdev); 552 dev_priv->fbdev = NULL; 553 } 554 555 static const struct drm_mode_config_funcs psb_mode_funcs = { 556 .fb_create = psb_user_framebuffer_create, 557 .output_poll_changed = drm_fb_helper_output_poll_changed, 558 }; 559 560 static void psb_setup_outputs(struct drm_device *dev) 561 { 562 struct drm_psb_private *dev_priv = dev->dev_private; 563 struct drm_connector *connector; 564 565 drm_mode_create_scaling_mode_property(dev); 566 567 /* It is ok for this to fail - we just don't get backlight control */ 568 if (!dev_priv->backlight_property) 569 dev_priv->backlight_property = drm_property_create_range(dev, 0, 570 "backlight", 0, 100); 571 dev_priv->ops->output_init(dev); 572 573 list_for_each_entry(connector, &dev->mode_config.connector_list, 574 head) { 575 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 576 struct drm_encoder *encoder = &gma_encoder->base; 577 int crtc_mask = 0, clone_mask = 0; 578 579 /* valid crtcs */ 580 switch (gma_encoder->type) { 581 case INTEL_OUTPUT_ANALOG: 582 crtc_mask = (1 << 0); 583 clone_mask = (1 << INTEL_OUTPUT_ANALOG); 584 break; 585 case INTEL_OUTPUT_SDVO: 586 crtc_mask = dev_priv->ops->sdvo_mask; 587 clone_mask = (1 << INTEL_OUTPUT_SDVO); 588 break; 589 case INTEL_OUTPUT_LVDS: 590 crtc_mask = dev_priv->ops->lvds_mask; 591 clone_mask = (1 << INTEL_OUTPUT_LVDS); 592 break; 593 case INTEL_OUTPUT_MIPI: 594 crtc_mask = (1 << 0); 595 clone_mask = (1 << INTEL_OUTPUT_MIPI); 596 break; 597 case INTEL_OUTPUT_MIPI2: 598 crtc_mask = (1 << 2); 599 clone_mask = (1 << INTEL_OUTPUT_MIPI2); 600 break; 601 case INTEL_OUTPUT_HDMI: 602 crtc_mask = dev_priv->ops->hdmi_mask; 603 clone_mask = (1 << INTEL_OUTPUT_HDMI); 604 break; 605 case INTEL_OUTPUT_DISPLAYPORT: 606 crtc_mask = (1 << 0) | (1 << 1); 607 clone_mask = (1 << INTEL_OUTPUT_DISPLAYPORT); 608 break; 609 case INTEL_OUTPUT_EDP: 610 crtc_mask = (1 << 1); 611 clone_mask = (1 << INTEL_OUTPUT_EDP); 612 } 613 encoder->possible_crtcs = crtc_mask; 614 encoder->possible_clones = 615 gma_connector_clones(dev, clone_mask); 616 } 617 } 618 619 void psb_modeset_init(struct drm_device *dev) 620 { 621 struct drm_psb_private *dev_priv = dev->dev_private; 622 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 623 int i; 624 625 drm_mode_config_init(dev); 626 627 dev->mode_config.min_width = 0; 628 dev->mode_config.min_height = 0; 629 630 dev->mode_config.funcs = &psb_mode_funcs; 631 632 /* set memory base */ 633 /* Oaktrail and Poulsbo should use BAR 2*/ 634 pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *) 635 &(dev->mode_config.fb_base)); 636 637 /* num pipes is 2 for PSB but 1 for Mrst */ 638 for (i = 0; i < dev_priv->num_pipe; i++) 639 psb_intel_crtc_init(dev, i, mode_dev); 640 641 dev->mode_config.max_width = 4096; 642 dev->mode_config.max_height = 4096; 643 644 psb_setup_outputs(dev); 645 646 if (dev_priv->ops->errata) 647 dev_priv->ops->errata(dev); 648 649 dev_priv->modeset = true; 650 } 651 652 void psb_modeset_cleanup(struct drm_device *dev) 653 { 654 struct drm_psb_private *dev_priv = dev->dev_private; 655 if (dev_priv->modeset) { 656 drm_kms_helper_poll_fini(dev); 657 psb_fbdev_fini(dev); 658 drm_mode_config_cleanup(dev); 659 } 660 } 661