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