drivers/gpu/drm/gma500/framebuffer.c

   1 /**************************************************************************
   2  * Copyright (c) 2007-2011, Intel Corporation.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  **************************************************************************/
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/errno.h>
  23 #include <linux/string.h>
  24 #include <linux/mm.h>
  25 #include <linux/tty.h>
  26 #include <linux/slab.h>
  27 #include <linux/delay.h>
  28 #include <linux/fb.h>
  29 #include <linux/init.h>
  30 #include <linux/console.h>
  31
  32 #include <drm/drmP.h>
  33 #include <drm/drm.h>
  34 #include <drm/drm_crtc.h>
  35 #include <drm/drm_fb_helper.h>
  36
  37 #include "psb_drv.h"
  38 #include "psb_intel_reg.h"
  39 #include "psb_intel_drv.h"
  40 #include "framebuffer.h"
  41 #include "gtt.h"
  42
  43 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb);
  44 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
  45                                               struct drm_file *file_priv,
  46                                               unsigned int *handle);
  47
  48 static const struct drm_framebuffer_funcs psb_fb_funcs = {
  49         .destroy = psb_user_framebuffer_destroy,
  50         .create_handle = psb_user_framebuffer_create_handle,
  51 };
  52
  53 #define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
  54
  55 static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
  56                            unsigned blue, unsigned transp,
  57                            struct fb_info *info)
  58 {
  59         struct psb_fbdev *fbdev = info->par;
  60         struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;
  61         uint32_t v;
  62
  63         if (!fb)
  64                 return -ENOMEM;
  65
  66         if (regno > 255)
  67                 return 1;
  68
  69         red = CMAP_TOHW(red, info->var.red.length);
  70         blue = CMAP_TOHW(blue, info->var.blue.length);
  71         green = CMAP_TOHW(green, info->var.green.length);
  72         transp = CMAP_TOHW(transp, info->var.transp.length);
  73
  74         v = (red << info->var.red.offset) |
  75             (green << info->var.green.offset) |
  76             (blue << info->var.blue.offset) |
  77             (transp << info->var.transp.offset);
  78
  79         if (regno < 16) {
  80                 switch (fb->bits_per_pixel) {
  81                 case 16:
  82                         ((uint32_t *) info->pseudo_palette)[regno] = v;
  83                         break;
  84                 case 24:
  85                 case 32:
  86                         ((uint32_t *) info->pseudo_palette)[regno] = v;
  87                         break;
  88                 }
  89         }
  90
  91         return 0;
  92 }
  93
  94 static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
  95 {
  96         struct psb_fbdev *fbdev = info->par;
  97         struct psb_framebuffer *psbfb = &fbdev->pfb;
  98         struct drm_device *dev = psbfb->base.dev;
  99
 100         /*
 101          *      We have to poke our nose in here. The core fb code assumes
 102          *      panning is part of the hardware that can be invoked before
 103          *      the actual fb is mapped. In our case that isn't quite true.
 104          */
 105         if (psbfb->gtt->npage) {
 106                 /* GTT roll shifts in 4K pages, we need to shift the right
 107                    number of pages */
 108                 int pages = info->fix.line_length >> 12;
 109                 psb_gtt_roll(dev, psbfb->gtt, var->yoffset * pages);
 110         }
 111         return 0;
 112 }
 113
 114 void psbfb_suspend(struct drm_device *dev)
 115 {
 116         struct drm_framebuffer *fb = 0;
 117         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 118
 119         console_lock();
 120         mutex_lock(&dev->mode_config.mutex);
 121         list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
 122                 struct fb_info *info = psbfb->fbdev;
 123                 fb_set_suspend(info, 1);
 124                 drm_fb_helper_blank(FB_BLANK_POWERDOWN, info);
 125         }
 126         mutex_unlock(&dev->mode_config.mutex);
 127         console_unlock();
 128 }
 129
 130 void psbfb_resume(struct drm_device *dev)
 131 {
 132         struct drm_framebuffer *fb = 0;
 133         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 134
 135         console_lock();
 136         mutex_lock(&dev->mode_config.mutex);
 137         list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
 138                 struct fb_info *info = psbfb->fbdev;
 139                 fb_set_suspend(info, 0);
 140                 drm_fb_helper_blank(FB_BLANK_UNBLANK, info);
 141         }
 142         mutex_unlock(&dev->mode_config.mutex);
 143         console_unlock();
 144         drm_helper_disable_unused_functions(dev);
 145 }
 146
 147 static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 148 {
 149         struct psb_framebuffer *psbfb = vma->vm_private_data;
 150         struct drm_device *dev = psbfb->base.dev;
 151         struct drm_psb_private *dev_priv = dev->dev_private;
 152         int page_num;
 153         int i;
 154         unsigned long address;
 155         int ret;
 156         unsigned long pfn;
 157         /* FIXME: assumes fb at stolen base which may not be true */
 158         unsigned long phys_addr = (unsigned long)dev_priv->stolen_base;
 159
 160         page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
 161         address = (unsigned long)vmf->virtual_address;
 162
 163         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 164
 165         for (i = 0; i < page_num; i++) {
 166                 pfn = (phys_addr >> PAGE_SHIFT);
 167
 168                 ret = vm_insert_mixed(vma, address, pfn);
 169                 if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
 170                         break;
 171                 else if (unlikely(ret != 0)) {
 172                         ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
 173                         return ret;
 174                 }
 175                 address += PAGE_SIZE;
 176                 phys_addr += PAGE_SIZE;
 177         }
 178         return VM_FAULT_NOPAGE;
 179 }
 180
 181 static void psbfb_vm_open(struct vm_area_struct *vma)
 182 {
 183 }
 184
 185 static void psbfb_vm_close(struct vm_area_struct *vma)
 186 {
 187 }
 188
 189 static struct vm_operations_struct psbfb_vm_ops = {
 190         .fault  = psbfb_vm_fault,
 191         .open   = psbfb_vm_open,
 192         .close  = psbfb_vm_close
 193 };
 194
 195 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 196 {
 197         struct psb_fbdev *fbdev = info->par;
 198         struct psb_framebuffer *psbfb = &fbdev->pfb;
 199
 200         if (vma->vm_pgoff != 0)
 201                 return -EINVAL;
 202         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
 203                 return -EINVAL;
 204
 205         if (!psbfb->addr_space)
 206                 psbfb->addr_space = vma->vm_file->f_mapping;
 207         /*
 208          * If this is a GEM object then info->screen_base is the virtual
 209          * kernel remapping of the object. FIXME: Review if this is
 210          * suitable for our mmap work
 211          */
 212         vma->vm_ops = &psbfb_vm_ops;
 213         vma->vm_private_data = (void *)psbfb;
 214         vma->vm_flags |= VM_RESERVED | VM_IO |
 215                                         VM_MIXEDMAP | VM_DONTEXPAND;
 216         return 0;
 217 }
 218
 219 static int psbfb_ioctl(struct fb_info *info, unsigned int cmd,
 220                                                 unsigned long arg)
 221 {
 222         return -ENOTTY;
 223 }
 224
 225 static struct fb_ops psbfb_ops = {
 226         .owner = THIS_MODULE,
 227         .fb_check_var = drm_fb_helper_check_var,
 228         .fb_set_par = drm_fb_helper_set_par,
 229         .fb_blank = drm_fb_helper_blank,
 230         .fb_setcolreg = psbfb_setcolreg,
 231         .fb_fillrect = cfb_fillrect,
 232         .fb_copyarea = psbfb_copyarea,
 233         .fb_imageblit = cfb_imageblit,
 234         .fb_mmap = psbfb_mmap,
 235         .fb_sync = psbfb_sync,
 236         .fb_ioctl = psbfb_ioctl,
 237 };
 238
 239 static struct fb_ops psbfb_roll_ops = {
 240         .owner = THIS_MODULE,
 241         .fb_check_var = drm_fb_helper_check_var,
 242         .fb_set_par = drm_fb_helper_set_par,
 243         .fb_blank = drm_fb_helper_blank,
 244         .fb_setcolreg = psbfb_setcolreg,
 245         .fb_fillrect = cfb_fillrect,
 246         .fb_copyarea = cfb_copyarea,
 247         .fb_imageblit = cfb_imageblit,
 248         .fb_pan_display = psbfb_pan,
 249         .fb_mmap = psbfb_mmap,
 250         .fb_sync = psbfb_sync,
 251         .fb_ioctl = psbfb_ioctl,
 252 };
 253
 254 static struct fb_ops psbfb_unaccel_ops = {
 255         .owner = THIS_MODULE,
 256         .fb_check_var = drm_fb_helper_check_var,
 257         .fb_set_par = drm_fb_helper_set_par,
 258         .fb_blank = drm_fb_helper_blank,
 259         .fb_setcolreg = psbfb_setcolreg,
 260         .fb_fillrect = cfb_fillrect,
 261         .fb_copyarea = cfb_copyarea,
 262         .fb_imageblit = cfb_imageblit,
 263         .fb_mmap = psbfb_mmap,
 264         .fb_ioctl = psbfb_ioctl,
 265 };
 266
 267 /**
 268  *      psb_framebuffer_init    -       initialize a framebuffer
 269  *      @dev: our DRM device
 270  *      @fb: framebuffer to set up
 271  *      @mode_cmd: mode description
 272  *      @gt: backing object
 273  *
 274  *      Configure and fill in the boilerplate for our frame buffer. Return
 275  *      0 on success or an error code if we fail.
 276  */
 277 static int psb_framebuffer_init(struct drm_device *dev,
 278                                         struct psb_framebuffer *fb,
 279                                         struct drm_mode_fb_cmd2 *mode_cmd,
 280                                         struct gtt_range *gt)
 281 {
 282         u32 bpp, depth;
 283         int ret;
 284
 285         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 286
 287         if (mode_cmd->pitches[0] & 63)
 288                 return -EINVAL;
 289         switch (bpp) {
 290         case 8:
 291         case 16:
 292         case 24:
 293         case 32:
 294                 break;
 295         default:
 296                 return -EINVAL;
 297         }
 298         ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
 299         if (ret) {
 300                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 301                 return ret;
 302         }
 303         drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
 304         fb->gtt = gt;
 305         return 0;
 306 }
 307
 308 /**
 309  *      psb_framebuffer_create  -       create a framebuffer backed by gt
 310  *      @dev: our DRM device
 311  *      @mode_cmd: the description of the requested mode
 312  *      @gt: the backing object
 313  *
 314  *      Create a framebuffer object backed by the gt, and fill in the
 315  *      boilerplate required
 316  *
 317  *      TODO: review object references
 318  */
 319
 320 static struct drm_framebuffer *psb_framebuffer_create
 321                         (struct drm_device *dev,
 322                          struct drm_mode_fb_cmd2 *mode_cmd,
 323                          struct gtt_range *gt)
 324 {
 325         struct psb_framebuffer *fb;
 326         int ret;
 327
 328         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 329         if (!fb)
 330                 return ERR_PTR(-ENOMEM);
 331
 332         ret = psb_framebuffer_init(dev, fb, mode_cmd, gt);
 333         if (ret) {
 334                 kfree(fb);
 335                 return ERR_PTR(ret);
 336         }
 337         return &fb->base;
 338 }
 339
 340 /**
 341  *      psbfb_alloc             -       allocate frame buffer memory
 342  *      @dev: the DRM device
 343  *      @aligned_size: space needed
 344  *      @force: fall back to GEM buffers if need be
 345  *
 346  *      Allocate the frame buffer. In the usual case we get a GTT range that
 347  *      is stolen memory backed and life is simple. If there isn't sufficient
 348  *      we fail as we don't have the virtual mapping space to really vmap it
 349  *      and the kernel console code can't handle non linear framebuffers.
 350  *
 351  *      Re-address this as and if the framebuffer layer grows this ability.
 352  */
 353 static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
 354 {
 355         struct gtt_range *backing;
 356         /* Begin by trying to use stolen memory backing */
 357         backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1);
 358         if (backing) {
 359                 if (drm_gem_private_object_init(dev,
 360                                         &backing->gem, aligned_size) == 0)
 361                         return backing;
 362                 psb_gtt_free_range(dev, backing);
 363         }
 364         return NULL;
 365 }
 366
 367 /**
 368  *      psbfb_create            -       create a framebuffer
 369  *      @fbdev: the framebuffer device
 370  *      @sizes: specification of the layout
 371  *
 372  *      Create a framebuffer to the specifications provided
 373  */
 374 static int psbfb_create(struct psb_fbdev *fbdev,
 375                                 struct drm_fb_helper_surface_size *sizes)
 376 {
 377         struct drm_device *dev = fbdev->psb_fb_helper.dev;
 378         struct drm_psb_private *dev_priv = dev->dev_private;
 379         struct fb_info *info;
 380         struct drm_framebuffer *fb;
 381         struct psb_framebuffer *psbfb = &fbdev->pfb;
 382         struct drm_mode_fb_cmd2 mode_cmd;
 383         struct device *device = &dev->pdev->dev;
 384         int size;
 385         int ret;
 386         struct gtt_range *backing;
 387         u32 bpp, depth;
 388         int gtt_roll = 0;
 389         int pitch_lines = 0;
 390
 391         mode_cmd.width = sizes->surface_width;
 392         mode_cmd.height = sizes->surface_height;
 393         bpp = sizes->surface_bpp;
 394
 395         /* No 24bit packed */
 396         if (bpp == 24)
 397                 bpp = 32;
 398
 399         do {
 400                 /*
 401                  * Acceleration via the GTT requires pitch to be
 402                  * power of two aligned. Preferably page but less
 403                  * is ok with some fonts
 404                  */
 405                 mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines);
 406                 depth = sizes->surface_depth;
 407
 408                 size = mode_cmd.pitches[0] * mode_cmd.height;
 409                 size = ALIGN(size, PAGE_SIZE);
 410
 411                 /* Allocate the fb in the GTT with stolen page backing */
 412                 backing = psbfb_alloc(dev, size);
 413
 414                 if (pitch_lines)
 415                         pitch_lines *= 2;
 416                 else
 417                         pitch_lines = 1;
 418                 gtt_roll++;
 419         } while (backing == NULL && pitch_lines <= 16);
 420
 421         /* The final pitch we accepted if we succeeded */
 422         pitch_lines /= 2;
 423
 424         if (backing == NULL) {
 425                 /*
 426                  *      We couldn't get the space we wanted, fall back to the
 427                  *      display engine requirement instead.  The HW requires
 428                  *      the pitch to be 64 byte aligned
 429                  */
 430
 431                 gtt_roll = 0;   /* Don't use GTT accelerated scrolling */
 432                 pitch_lines = 64;
 433
 434                 mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);
 435
 436                 size = mode_cmd.pitches[0] * mode_cmd.height;
 437                 size = ALIGN(size, PAGE_SIZE);
 438
 439                 /* Allocate the framebuffer in the GTT with stolen page backing */
 440                 backing = psbfb_alloc(dev, size);
 441                 if (backing == NULL)
 442                         return -ENOMEM;
 443         }
 444
 445         mutex_lock(&dev->struct_mutex);
 446
 447         info = framebuffer_alloc(0, device);
 448         if (!info) {
 449                 ret = -ENOMEM;
 450                 goto out_err1;
 451         }
 452         info->par = fbdev;
 453
 454         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 455
 456         ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);
 457         if (ret)
 458                 goto out_unref;
 459
 460         fb = &psbfb->base;
 461         psbfb->fbdev = info;
 462
 463         fbdev->psb_fb_helper.fb = fb;
 464         fbdev->psb_fb_helper.fbdev = info;
 465
 466         strcpy(info->fix.id, "psbfb");
 467
 468         info->flags = FBINFO_DEFAULT;
 469         if (dev_priv->ops->accel_2d && pitch_lines > 8) /* 2D engine */
 470                 info->fbops = &psbfb_ops;
 471         else if (gtt_roll) {    /* GTT rolling seems best */
 472                 info->fbops = &psbfb_roll_ops;
 473                 info->flags |= FBINFO_HWACCEL_YPAN;
 474         } else  /* Software */
 475                 info->fbops = &psbfb_unaccel_ops;
 476
 477         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 478         if (ret) {
 479                 ret = -ENOMEM;
 480                 goto out_unref;
 481         }
 482
 483         info->fix.smem_start = dev->mode_config.fb_base;
 484         info->fix.smem_len = size;
 485         info->fix.ywrapstep = gtt_roll;
 486         info->fix.ypanstep = 0;
 487
 488         /* Accessed stolen memory directly */
 489         info->screen_base = (char *)dev_priv->vram_addr +
 490                                                         backing->offset;
 491         info->screen_size = size;
 492
 493         if (dev_priv->gtt.stolen_size) {
 494                 info->apertures = alloc_apertures(1);
 495                 if (!info->apertures) {
 496                         ret = -ENOMEM;
 497                         goto out_unref;
 498                 }
 499                 info->apertures->ranges[0].base = dev->mode_config.fb_base;
 500                 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
 501         }
 502
 503         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 504         drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
 505                                 sizes->fb_width, sizes->fb_height);
 506
 507         info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
 508         info->fix.mmio_len = pci_resource_len(dev->pdev, 0);
 509
 510         info->pixmap.size = 64 * 1024;
 511         info->pixmap.buf_align = 8;
 512         info->pixmap.access_align = 32;
 513         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 514         info->pixmap.scan_align = 1;
 515
 516         dev_info(dev->dev, "allocated %dx%d fb\n",
 517                                         psbfb->base.width, psbfb->base.height);
 518
 519         mutex_unlock(&dev->struct_mutex);
 520         return 0;
 521 out_unref:
 522         if (backing->stolen)
 523                 psb_gtt_free_range(dev, backing);
 524         else
 525                 drm_gem_object_unreference(&backing->gem);
 526 out_err1:
 527         mutex_unlock(&dev->struct_mutex);
 528         psb_gtt_free_range(dev, backing);
 529         return ret;
 530 }
 531
 532 /**
 533  *      psb_user_framebuffer_create     -       create framebuffer
 534  *      @dev: our DRM device
 535  *      @filp: client file
 536  *      @cmd: mode request
 537  *
 538  *      Create a new framebuffer backed by a userspace GEM object
 539  */
 540 static struct drm_framebuffer *psb_user_framebuffer_create
 541                         (struct drm_device *dev, struct drm_file *filp,
 542                          struct drm_mode_fb_cmd2 *cmd)
 543 {
 544         struct gtt_range *r;
 545         struct drm_gem_object *obj;
 546
 547         /*
 548          *      Find the GEM object and thus the gtt range object that is
 549          *      to back this space
 550          */
 551         obj = drm_gem_object_lookup(dev, filp, cmd->handles[0]);
 552         if (obj == NULL)
 553                 return ERR_PTR(-ENOENT);
 554
 555         /* Let the core code do all the work */
 556         r = container_of(obj, struct gtt_range, gem);
 557         return psb_framebuffer_create(dev, cmd, r);
 558 }
 559
 560 static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 561                                                         u16 blue, int regno)
 562 {
 563 }
 564
 565 static void psbfb_gamma_get(struct drm_crtc *crtc, u16 *red,
 566                                         u16 *green, u16 *blue, int regno)
 567 {
 568 }
 569
 570 static int psbfb_probe(struct drm_fb_helper *helper,
 571                                 struct drm_fb_helper_surface_size *sizes)
 572 {
 573         struct psb_fbdev *psb_fbdev = (struct psb_fbdev *)helper;
 574         int new_fb = 0;
 575         int ret;
 576
 577         if (!helper->fb) {
 578                 ret = psbfb_create(psb_fbdev, sizes);
 579                 if (ret)
 580                         return ret;
 581                 new_fb = 1;
 582         }
 583         return new_fb;
 584 }
 585
 586 struct drm_fb_helper_funcs psb_fb_helper_funcs = {
 587         .gamma_set = psbfb_gamma_set,
 588         .gamma_get = psbfb_gamma_get,
 589         .fb_probe = psbfb_probe,
 590 };
 591
 592 int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
 593 {
 594         struct fb_info *info;
 595         struct psb_framebuffer *psbfb = &fbdev->pfb;
 596
 597         if (fbdev->psb_fb_helper.fbdev) {
 598                 info = fbdev->psb_fb_helper.fbdev;
 599                 unregister_framebuffer(info);
 600                 if (info->cmap.len)
 601                         fb_dealloc_cmap(&info->cmap);
 602                 framebuffer_release(info);
 603         }
 604         drm_fb_helper_fini(&fbdev->psb_fb_helper);
 605         drm_framebuffer_cleanup(&psbfb->base);
 606
 607         if (psbfb->gtt)
 608                 drm_gem_object_unreference(&psbfb->gtt->gem);
 609         return 0;
 610 }
 611
 612 int psb_fbdev_init(struct drm_device *dev)
 613 {
 614         struct psb_fbdev *fbdev;
 615         struct drm_psb_private *dev_priv = dev->dev_private;
 616
 617         fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL);
 618         if (!fbdev) {
 619                 dev_err(dev->dev, "no memory\n");
 620                 return -ENOMEM;
 621         }
 622
 623         dev_priv->fbdev = fbdev;
 624         fbdev->psb_fb_helper.funcs = &psb_fb_helper_funcs;
 625
 626         drm_fb_helper_init(dev, &fbdev->psb_fb_helper, dev_priv->ops->crtcs,
 627                                                         INTELFB_CONN_LIMIT);
 628
 629         drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper);
 630         drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32);
 631         return 0;
 632 }
 633
 634 void psb_fbdev_fini(struct drm_device *dev)
 635 {
 636         struct drm_psb_private *dev_priv = dev->dev_private;
 637
 638         if (!dev_priv->fbdev)
 639                 return;
 640
 641         psb_fbdev_destroy(dev, dev_priv->fbdev);
 642         kfree(dev_priv->fbdev);
 643         dev_priv->fbdev = NULL;
 644 }
 645
 646 static void psbfb_output_poll_changed(struct drm_device *dev)
 647 {
 648         struct drm_psb_private *dev_priv = dev->dev_private;
 649         struct psb_fbdev *fbdev = (struct psb_fbdev *)dev_priv->fbdev;
 650         drm_fb_helper_hotplug_event(&fbdev->psb_fb_helper);
 651 }
 652
 653 /**
 654  *      psb_user_framebuffer_create_handle - add hamdle to a framebuffer
 655  *      @fb: framebuffer
 656  *      @file_priv: our DRM file
 657  *      @handle: returned handle
 658  *
 659  *      Our framebuffer object is a GTT range which also contains a GEM
 660  *      object. We need to turn it into a handle for userspace. GEM will do
 661  *      the work for us
 662  */
 663 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
 664                                               struct drm_file *file_priv,
 665                                               unsigned int *handle)
 666 {
 667         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 668         struct gtt_range *r = psbfb->gtt;
 669         return drm_gem_handle_create(file_priv, &r->gem, handle);
 670 }
 671
 672 /**
 673  *      psb_user_framebuffer_destroy    -       destruct user created fb
 674  *      @fb: framebuffer
 675  *
 676  *      User framebuffers are backed by GEM objects so all we have to do is
 677  *      clean up a bit and drop the reference, GEM will handle the fallout
 678  */
 679 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)
 680 {
 681         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 682         struct gtt_range *r = psbfb->gtt;
 683         struct drm_device *dev = fb->dev;
 684         struct drm_psb_private *dev_priv = dev->dev_private;
 685         struct psb_fbdev *fbdev = dev_priv->fbdev;
 686         struct drm_crtc *crtc;
 687         int reset = 0;
 688
 689         /* Should never get stolen memory for a user fb */
 690         WARN_ON(r->stolen);
 691
 692         /* Check if we are erroneously live */
 693         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 694                 if (crtc->fb == fb)
 695                         reset = 1;
 696
 697         if (reset)
 698                 /*
 699                  * Now force a sane response before we permit the DRM CRTC
 700                  * layer to do stupid things like blank the display. Instead
 701                  * we reset this framebuffer as if the user had forced a reset.
 702                  * We must do this before the cleanup so that the DRM layer
 703                  * doesn't get a chance to stick its oar in where it isn't
 704                  * wanted.
 705                  */
 706                 drm_fb_helper_restore_fbdev_mode(&fbdev->psb_fb_helper);
 707
 708         /* Let DRM do its clean up */
 709         drm_framebuffer_cleanup(fb);
 710         /*  We are no longer using the resource in GEM */
 711         drm_gem_object_unreference_unlocked(&r->gem);
 712         kfree(fb);
 713 }
 714
 715 static const struct drm_mode_config_funcs psb_mode_funcs = {
 716         .fb_create = psb_user_framebuffer_create,
 717         .output_poll_changed = psbfb_output_poll_changed,
 718 };
 719
 720 static int psb_create_backlight_property(struct drm_device *dev)
 721 {
 722         struct drm_psb_private *dev_priv = dev->dev_private;
 723         struct drm_property *backlight;
 724
 725         if (dev_priv->backlight_property)
 726                 return 0;
 727
 728         backlight = drm_property_create(dev, DRM_MODE_PROP_RANGE,
 729                                                         "backlight", 2);
 730         backlight->values[0] = 0;
 731         backlight->values[1] = 100;
 732
 733         dev_priv->backlight_property = backlight;
 734
 735         return 0;
 736 }
 737
 738 static void psb_setup_outputs(struct drm_device *dev)
 739 {
 740         struct drm_psb_private *dev_priv = dev->dev_private;
 741         struct drm_connector *connector;
 742
 743         drm_mode_create_scaling_mode_property(dev);
 744         psb_create_backlight_property(dev);
 745
 746         dev_priv->ops->output_init(dev);
 747
 748         list_for_each_entry(connector, &dev->mode_config.connector_list,
 749                             head) {
 750                 struct psb_intel_encoder *psb_intel_encoder =
 751                         psb_intel_attached_encoder(connector);
 752                 struct drm_encoder *encoder = &psb_intel_encoder->base;
 753                 int crtc_mask = 0, clone_mask = 0;
 754
 755                 /* valid crtcs */
 756                 switch (psb_intel_encoder->type) {
 757                 case INTEL_OUTPUT_ANALOG:
 758                         crtc_mask = (1 << 0);
 759                         clone_mask = (1 << INTEL_OUTPUT_ANALOG);
 760                         break;
 761                 case INTEL_OUTPUT_SDVO:
 762                         crtc_mask = ((1 << 0) | (1 << 1));
 763                         clone_mask = (1 << INTEL_OUTPUT_SDVO);
 764                         break;
 765                 case INTEL_OUTPUT_LVDS:
 766                         if (IS_MRST(dev))
 767                                 crtc_mask = (1 << 0);
 768                         else
 769                                 crtc_mask = (1 << 1);
 770                         clone_mask = (1 << INTEL_OUTPUT_LVDS);
 771                         break;
 772                 case INTEL_OUTPUT_MIPI:
 773                         crtc_mask = (1 << 0);
 774                         clone_mask = (1 << INTEL_OUTPUT_MIPI);
 775                         break;
 776                 case INTEL_OUTPUT_MIPI2:
 777                         crtc_mask = (1 << 2);
 778                         clone_mask = (1 << INTEL_OUTPUT_MIPI2);
 779                         break;
 780                 case INTEL_OUTPUT_HDMI:
 781                         if (IS_MFLD(dev))
 782                                 crtc_mask = (1 << 1);
 783                         else
 784                                 crtc_mask = (1 << 0);
 785                         clone_mask = (1 << INTEL_OUTPUT_HDMI);
 786                         break;
 787                 }
 788                 encoder->possible_crtcs = crtc_mask;
 789                 encoder->possible_clones =
 790                     psb_intel_connector_clones(dev, clone_mask);
 791         }
 792 }
 793
 794 void psb_modeset_init(struct drm_device *dev)
 795 {
 796         struct drm_psb_private *dev_priv = dev->dev_private;
 797         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 798         int i;
 799
 800         drm_mode_config_init(dev);
 801
 802         dev->mode_config.min_width = 0;
 803         dev->mode_config.min_height = 0;
 804
 805         dev->mode_config.funcs = (void *) &psb_mode_funcs;
 806
 807         /* set memory base */
 808         /* Oaktrail and Poulsbo should use BAR 2*/
 809         pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
 810                                         &(dev->mode_config.fb_base));
 811
 812         /* num pipes is 2 for PSB but 1 for Mrst */
 813         for (i = 0; i < dev_priv->num_pipe; i++)
 814                 psb_intel_crtc_init(dev, i, mode_dev);
 815
 816         dev->mode_config.max_width = 2048;
 817         dev->mode_config.max_height = 2048;
 818
 819         psb_setup_outputs(dev);
 820 }
 821
 822 void psb_modeset_cleanup(struct drm_device *dev)
 823 {
 824         mutex_lock(&dev->struct_mutex);
 825
 826         drm_kms_helper_poll_fini(dev);
 827         psb_fbdev_fini(dev);
 828         drm_mode_config_cleanup(dev);
 829
 830         mutex_unlock(&dev->struct_mutex);
 831 }