drivers/staging/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 #include "mdfld_output.h"
  44
  45 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb);
  46 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
  47                                               struct drm_file *file_priv,
  48                                               unsigned int *handle);
  49
  50 static const struct drm_framebuffer_funcs psb_fb_funcs = {
  51         .destroy = psb_user_framebuffer_destroy,
  52         .create_handle = psb_user_framebuffer_create_handle,
  53 };
  54
  55 #define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
  56
  57 static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
  58                            unsigned blue, unsigned transp,
  59                            struct fb_info *info)
  60 {
  61         struct psb_fbdev *fbdev = info->par;
  62         struct drm_framebuffer *fb = fbdev->psb_fb_helper.fb;
  63         uint32_t v;
  64
  65         if (!fb)
  66                 return -ENOMEM;
  67
  68         if (regno > 255)
  69                 return 1;
  70
  71         red = CMAP_TOHW(red, info->var.red.length);
  72         blue = CMAP_TOHW(blue, info->var.blue.length);
  73         green = CMAP_TOHW(green, info->var.green.length);
  74         transp = CMAP_TOHW(transp, info->var.transp.length);
  75
  76         v = (red << info->var.red.offset) |
  77             (green << info->var.green.offset) |
  78             (blue << info->var.blue.offset) |
  79             (transp << info->var.transp.offset);
  80
  81         if (regno < 16) {
  82                 switch (fb->bits_per_pixel) {
  83                 case 16:
  84                         ((uint32_t *) info->pseudo_palette)[regno] = v;
  85                         break;
  86                 case 24:
  87                 case 32:
  88                         ((uint32_t *) info->pseudo_palette)[regno] = v;
  89                         break;
  90                 }
  91         }
  92
  93         return 0;
  94 }
  95
  96 static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
  97 {
  98         struct psb_fbdev *fbdev = info->par;
  99         struct psb_framebuffer *psbfb = &fbdev->pfb;
 100         struct drm_device *dev = psbfb->base.dev;
 101
 102         /*
 103          *      We have to poke our nose in here. The core fb code assumes
 104          *      panning is part of the hardware that can be invoked before
 105          *      the actual fb is mapped. In our case that isn't quite true.
 106          */
 107         if (psbfb->gtt->npage)
 108                 psb_gtt_roll(dev, psbfb->gtt, var->yoffset);
 109         return 0;
 110 }
 111
 112 void psbfb_suspend(struct drm_device *dev)
 113 {
 114         struct drm_framebuffer *fb = 0;
 115         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 116
 117         console_lock();
 118         mutex_lock(&dev->mode_config.mutex);
 119         list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
 120                 struct fb_info *info = psbfb->fbdev;
 121                 fb_set_suspend(info, 1);
 122                 drm_fb_helper_blank(FB_BLANK_POWERDOWN, info);
 123         }
 124         mutex_unlock(&dev->mode_config.mutex);
 125         console_unlock();
 126 }
 127
 128 void psbfb_resume(struct drm_device *dev)
 129 {
 130         struct drm_framebuffer *fb = 0;
 131         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 132
 133         console_lock();
 134         mutex_lock(&dev->mode_config.mutex);
 135         list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
 136                 struct fb_info *info = psbfb->fbdev;
 137                 fb_set_suspend(info, 0);
 138                 drm_fb_helper_blank(FB_BLANK_UNBLANK, info);
 139         }
 140         mutex_unlock(&dev->mode_config.mutex);
 141         console_unlock();
 142         drm_helper_disable_unused_functions(dev);
 143 }
 144
 145 static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 146 {
 147         struct psb_framebuffer *psbfb = vma->vm_private_data;
 148         struct drm_device *dev = psbfb->base.dev;
 149         struct drm_psb_private *dev_priv = dev->dev_private;
 150         int page_num;
 151         int i;
 152         unsigned long address;
 153         int ret;
 154         unsigned long pfn;
 155         /* FIXME: assumes fb at stolen base which may not be true */
 156         unsigned long phys_addr = (unsigned long)dev_priv->stolen_base;
 157
 158         page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
 159         address = (unsigned long)vmf->virtual_address;
 160
 161         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 162
 163         for (i = 0; i < page_num; i++) {
 164                 pfn = (phys_addr >> PAGE_SHIFT);
 165
 166                 ret = vm_insert_mixed(vma, address, pfn);
 167                 if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
 168                         break;
 169                 else if (unlikely(ret != 0)) {
 170                         ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
 171                         return ret;
 172                 }
 173                 address += PAGE_SIZE;
 174                 phys_addr += PAGE_SIZE;
 175         }
 176         return VM_FAULT_NOPAGE;
 177 }
 178
 179 static void psbfb_vm_open(struct vm_area_struct *vma)
 180 {
 181 }
 182
 183 static void psbfb_vm_close(struct vm_area_struct *vma)
 184 {
 185 }
 186
 187 static struct vm_operations_struct psbfb_vm_ops = {
 188         .fault  = psbfb_vm_fault,
 189         .open   = psbfb_vm_open,
 190         .close  = psbfb_vm_close
 191 };
 192
 193 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 194 {
 195         struct psb_fbdev *fbdev = info->par;
 196         struct psb_framebuffer *psbfb = &fbdev->pfb;
 197
 198         if (vma->vm_pgoff != 0)
 199                 return -EINVAL;
 200         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
 201                 return -EINVAL;
 202
 203         if (!psbfb->addr_space)
 204                 psbfb->addr_space = vma->vm_file->f_mapping;
 205         /*
 206          * If this is a GEM object then info->screen_base is the virtual
 207          * kernel remapping of the object. FIXME: Review if this is
 208          * suitable for our mmap work
 209          */
 210         vma->vm_ops = &psbfb_vm_ops;
 211         vma->vm_private_data = (void *)psbfb;
 212         vma->vm_flags |= VM_RESERVED | VM_IO |
 213                                         VM_MIXEDMAP | VM_DONTEXPAND;
 214         return 0;
 215 }
 216
 217 static int psbfb_ioctl(struct fb_info *info, unsigned int cmd,
 218                                                 unsigned long arg)
 219 {
 220         return -ENOTTY;
 221 }
 222
 223 static struct fb_ops psbfb_ops = {
 224         .owner = THIS_MODULE,
 225         .fb_check_var = drm_fb_helper_check_var,
 226         .fb_set_par = drm_fb_helper_set_par,
 227         .fb_blank = drm_fb_helper_blank,
 228         .fb_setcolreg = psbfb_setcolreg,
 229         .fb_fillrect = cfb_fillrect,
 230         .fb_copyarea = psbfb_copyarea,
 231         .fb_imageblit = cfb_imageblit,
 232         .fb_mmap = psbfb_mmap,
 233         .fb_sync = psbfb_sync,
 234         .fb_ioctl = psbfb_ioctl,
 235 };
 236
 237 static struct fb_ops psbfb_roll_ops = {
 238         .owner = THIS_MODULE,
 239         .fb_check_var = drm_fb_helper_check_var,
 240         .fb_set_par = drm_fb_helper_set_par,
 241         .fb_blank = drm_fb_helper_blank,
 242         .fb_setcolreg = psbfb_setcolreg,
 243         .fb_fillrect = cfb_fillrect,
 244         .fb_copyarea = cfb_copyarea,
 245         .fb_imageblit = cfb_imageblit,
 246         .fb_pan_display = psbfb_pan,
 247         .fb_mmap = psbfb_mmap,
 248         .fb_sync = psbfb_sync,
 249         .fb_ioctl = psbfb_ioctl,
 250 };
 251
 252 static struct fb_ops psbfb_unaccel_ops = {
 253         .owner = THIS_MODULE,
 254         .fb_check_var = drm_fb_helper_check_var,
 255         .fb_set_par = drm_fb_helper_set_par,
 256         .fb_blank = drm_fb_helper_blank,
 257         .fb_setcolreg = psbfb_setcolreg,
 258         .fb_fillrect = cfb_fillrect,
 259         .fb_copyarea = cfb_copyarea,
 260         .fb_imageblit = cfb_imageblit,
 261         .fb_mmap = psbfb_mmap,
 262         .fb_ioctl = psbfb_ioctl,
 263 };
 264
 265 /**
 266  *      psb_framebuffer_init    -       initialize a framebuffer
 267  *      @dev: our DRM device
 268  *      @fb: framebuffer to set up
 269  *      @mode_cmd: mode description
 270  *      @gt: backing object
 271  *
 272  *      Configure and fill in the boilerplate for our frame buffer. Return
 273  *      0 on success or an error code if we fail.
 274  */
 275 static int psb_framebuffer_init(struct drm_device *dev,
 276                                         struct psb_framebuffer *fb,
 277                                         struct drm_mode_fb_cmd2 *mode_cmd,
 278                                         struct gtt_range *gt)
 279 {
 280         u32 bpp, depth;
 281         int ret;
 282
 283         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 284
 285         if (mode_cmd->pitches[0] & 63)
 286                 return -EINVAL;
 287         switch (bpp) {
 288         case 8:
 289         case 16:
 290         case 24:
 291         case 32:
 292                 break;
 293         default:
 294                 return -EINVAL;
 295         }
 296         ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
 297         if (ret) {
 298                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 299                 return ret;
 300         }
 301         drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
 302         fb->gtt = gt;
 303         return 0;
 304 }
 305
 306 /**
 307  *      psb_framebuffer_create  -       create a framebuffer backed by gt
 308  *      @dev: our DRM device
 309  *      @mode_cmd: the description of the requested mode
 310  *      @gt: the backing object
 311  *
 312  *      Create a framebuffer object backed by the gt, and fill in the
 313  *      boilerplate required
 314  *
 315  *      TODO: review object references
 316  */
 317
 318 static struct drm_framebuffer *psb_framebuffer_create
 319                         (struct drm_device *dev,
 320                          struct drm_mode_fb_cmd2 *mode_cmd,
 321                          struct gtt_range *gt)
 322 {
 323         struct psb_framebuffer *fb;
 324         int ret;
 325
 326         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 327         if (!fb)
 328                 return ERR_PTR(-ENOMEM);
 329
 330         ret = psb_framebuffer_init(dev, fb, mode_cmd, gt);
 331         if (ret) {
 332                 kfree(fb);
 333                 return ERR_PTR(ret);
 334         }
 335         return &fb->base;
 336 }
 337
 338 /**
 339  *      psbfb_alloc             -       allocate frame buffer memory
 340  *      @dev: the DRM device
 341  *      @aligned_size: space needed
 342  *      @force: fall back to GEM buffers if need be
 343  *
 344  *      Allocate the frame buffer. In the usual case we get a GTT range that
 345  *      is stolen memory backed and life is simple. If there isn't sufficient
 346  *      stolen memory or the system has no stolen memory we allocate a range
 347  *      and back it with a GEM object.
 348  *
 349  *      In this case the GEM object has no handle.
 350  */
 351 static struct gtt_range *psbfb_alloc(struct drm_device *dev,
 352                                                 int aligned_size, int force)
 353 {
 354         struct gtt_range *backing;
 355         /* Begin by trying to use stolen memory backing */
 356         backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1);
 357         if (backing) {
 358                 if (drm_gem_private_object_init(dev,
 359                                         &backing->gem, aligned_size) == 0)
 360                         return backing;
 361                 psb_gtt_free_range(dev, backing);
 362         }
 363         if (!force)
 364                 return NULL;
 365
 366         /* Next try using GEM host memory */
 367         backing = psb_gtt_alloc_range(dev, aligned_size, "fb(gem)", 0);
 368         if (backing == NULL)
 369                 return NULL;
 370
 371         /* Now back it with an object */
 372         if (drm_gem_object_init(dev, &backing->gem, aligned_size) != 0) {
 373                 psb_gtt_free_range(dev, backing);
 374                 return NULL;
 375         }
 376         return backing;
 377 }
 378
 379 /**
 380  *      psbfb_create            -       create a framebuffer
 381  *      @fbdev: the framebuffer device
 382  *      @sizes: specification of the layout
 383  *
 384  *      Create a framebuffer to the specifications provided
 385  */
 386 static int psbfb_create(struct psb_fbdev *fbdev,
 387                                 struct drm_fb_helper_surface_size *sizes)
 388 {
 389         struct drm_device *dev = fbdev->psb_fb_helper.dev;
 390         struct drm_psb_private *dev_priv = dev->dev_private;
 391         struct fb_info *info;
 392         struct drm_framebuffer *fb;
 393         struct psb_framebuffer *psbfb = &fbdev->pfb;
 394         struct drm_mode_fb_cmd2 mode_cmd;
 395         struct device *device = &dev->pdev->dev;
 396         int size;
 397         int ret;
 398         struct gtt_range *backing;
 399         int gtt_roll = 1;
 400         u32 bpp, depth;
 401
 402         mode_cmd.width = sizes->surface_width;
 403         mode_cmd.height = sizes->surface_height;
 404         bpp = sizes->surface_bpp;
 405
 406         /* No 24bit packed */
 407         if (bpp == 24)
 408                 bpp = 32;
 409
 410         /* Acceleration via the GTT requires pitch to be 4096 byte aligned
 411            (ie 1024 or 2048 pixels in normal use) */
 412         mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096);
 413         depth = sizes->surface_depth;
 414
 415         size = mode_cmd.pitches[0] * mode_cmd.height;
 416         size = ALIGN(size, PAGE_SIZE);
 417
 418         /* Allocate the framebuffer in the GTT with stolen page backing */
 419         backing = psbfb_alloc(dev, size, 0);
 420         if (backing == NULL) {
 421                 /*
 422                  *      We couldn't get the space we wanted, fall back to the
 423                  *      display engine requirement instead.  The HW requires
 424                  *      the pitch to be 64 byte aligned
 425                  */
 426
 427                 gtt_roll = 0;   /* Don't use GTT accelerated scrolling */
 428
 429                 mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);
 430                 depth = sizes->surface_depth;
 431
 432                 size = mode_cmd.pitches[0] * mode_cmd.height;
 433                 size = ALIGN(size, PAGE_SIZE);
 434
 435                 /* Allocate the framebuffer in the GTT with stolen page
 436                    backing when there is room */
 437                 backing = psbfb_alloc(dev, size, 1);
 438                 if (backing == NULL)
 439                         return -ENOMEM;
 440         }
 441
 442         mutex_lock(&dev->struct_mutex);
 443
 444         info = framebuffer_alloc(0, device);
 445         if (!info) {
 446                 ret = -ENOMEM;
 447                 goto out_err1;
 448         }
 449         info->par = fbdev;
 450
 451         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 452
 453         ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);
 454         if (ret)
 455                 goto out_unref;
 456
 457         fb = &psbfb->base;
 458         psbfb->fbdev = info;
 459
 460         fbdev->psb_fb_helper.fb = fb;
 461         fbdev->psb_fb_helper.fbdev = info;
 462
 463         strcpy(info->fix.id, "psbfb");
 464
 465         info->flags = FBINFO_DEFAULT;
 466         if (gtt_roll) { /* GTT rolling seems best */
 467                 info->fbops = &psbfb_roll_ops;
 468                 info->flags |= FBINFO_HWACCEL_YPAN;
 469         }
 470         else if (dev_priv->ops->accel_2d)       /* 2D engine */
 471                 info->fbops = &psbfb_ops;
 472         else    /* Software */
 473                 info->fbops = &psbfb_unaccel_ops;
 474
 475         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 476         if (ret) {
 477                 ret = -ENOMEM;
 478                 goto out_unref;
 479         }
 480
 481         info->fix.smem_start = dev->mode_config.fb_base;
 482         info->fix.smem_len = size;
 483         info->fix.ywrapstep = gtt_roll;
 484         info->fix.ypanstep = gtt_roll;
 485
 486         if (backing->stolen) {
 487                 /* Accessed stolen memory directly */
 488                 info->screen_base = (char *)dev_priv->vram_addr +
 489                                                         backing->offset;
 490         } else {
 491                 /* Pin the pages into the GTT and create a mapping to them */
 492                 psb_gtt_pin(backing);
 493                 info->screen_base = vm_map_ram(backing->pages, backing->npage,
 494                                 -1, PAGE_KERNEL);
 495                 if (info->screen_base == NULL) {
 496                         psb_gtt_unpin(backing);
 497                         ret = -ENOMEM;
 498                         goto out_unref;
 499                 }
 500                 psbfb->vm_map = 1;
 501         }
 502         info->screen_size = size;
 503
 504         if (dev_priv->gtt.stolen_size) {
 505                 info->apertures = alloc_apertures(1);
 506                 if (!info->apertures) {
 507                         ret = -ENOMEM;
 508                         goto out_unref;
 509                 }
 510                 info->apertures->ranges[0].base = dev->mode_config.fb_base;
 511                 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
 512         }
 513
 514         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 515         drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
 516                                 sizes->fb_width, sizes->fb_height);
 517
 518         info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
 519         info->fix.mmio_len = pci_resource_len(dev->pdev, 0);
 520
 521         info->pixmap.size = 64 * 1024;
 522         info->pixmap.buf_align = 8;
 523         info->pixmap.access_align = 32;
 524         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 525         info->pixmap.scan_align = 1;
 526
 527         dev_info(dev->dev, "allocated %dx%d fb\n",
 528                                         psbfb->base.width, psbfb->base.height);
 529
 530         mutex_unlock(&dev->struct_mutex);
 531         return 0;
 532 out_unref:
 533         if (backing->stolen)
 534                 psb_gtt_free_range(dev, backing);
 535         else {
 536                 if (psbfb->vm_map)
 537                         vm_unmap_ram(info->screen_base, backing->npage);
 538                 drm_gem_object_unreference(&backing->gem);
 539         }
 540 out_err1:
 541         mutex_unlock(&dev->struct_mutex);
 542         psb_gtt_free_range(dev, backing);
 543         return ret;
 544 }
 545
 546 /**
 547  *      psb_user_framebuffer_create     -       create framebuffer
 548  *      @dev: our DRM device
 549  *      @filp: client file
 550  *      @cmd: mode request
 551  *
 552  *      Create a new framebuffer backed by a userspace GEM object
 553  */
 554 static struct drm_framebuffer *psb_user_framebuffer_create
 555                         (struct drm_device *dev, struct drm_file *filp,
 556                          struct drm_mode_fb_cmd2 *cmd)
 557 {
 558         struct gtt_range *r;
 559         struct drm_gem_object *obj;
 560
 561         /*
 562          *      Find the GEM object and thus the gtt range object that is
 563          *      to back this space
 564          */
 565         obj = drm_gem_object_lookup(dev, filp, cmd->handles[0]);
 566         if (obj == NULL)
 567                 return ERR_PTR(-ENOENT);
 568
 569         /* Let the core code do all the work */
 570         r = container_of(obj, struct gtt_range, gem);
 571         return psb_framebuffer_create(dev, cmd, r);
 572 }
 573
 574 static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 575                                                         u16 blue, int regno)
 576 {
 577 }
 578
 579 static void psbfb_gamma_get(struct drm_crtc *crtc, u16 *red,
 580                                         u16 *green, u16 *blue, int regno)
 581 {
 582 }
 583
 584 static int psbfb_probe(struct drm_fb_helper *helper,
 585                                 struct drm_fb_helper_surface_size *sizes)
 586 {
 587         struct psb_fbdev *psb_fbdev = (struct psb_fbdev *)helper;
 588         int new_fb = 0;
 589         int ret;
 590
 591         if (!helper->fb) {
 592                 ret = psbfb_create(psb_fbdev, sizes);
 593                 if (ret)
 594                         return ret;
 595                 new_fb = 1;
 596         }
 597         return new_fb;
 598 }
 599
 600 struct drm_fb_helper_funcs psb_fb_helper_funcs = {
 601         .gamma_set = psbfb_gamma_set,
 602         .gamma_get = psbfb_gamma_get,
 603         .fb_probe = psbfb_probe,
 604 };
 605
 606 int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
 607 {
 608         struct fb_info *info;
 609         struct psb_framebuffer *psbfb = &fbdev->pfb;
 610
 611         if (fbdev->psb_fb_helper.fbdev) {
 612                 info = fbdev->psb_fb_helper.fbdev;
 613
 614                 /* If this is our base framebuffer then kill any virtual map
 615                    for the framebuffer layer and unpin it */
 616                 if (psbfb->vm_map) {
 617                         vm_unmap_ram(info->screen_base, psbfb->gtt->npage);
 618                         psb_gtt_unpin(psbfb->gtt);
 619                 }
 620                 unregister_framebuffer(info);
 621                 if (info->cmap.len)
 622                         fb_dealloc_cmap(&info->cmap);
 623                 framebuffer_release(info);
 624         }
 625         drm_fb_helper_fini(&fbdev->psb_fb_helper);
 626         drm_framebuffer_cleanup(&psbfb->base);
 627
 628         if (psbfb->gtt)
 629                 drm_gem_object_unreference(&psbfb->gtt->gem);
 630         return 0;
 631 }
 632
 633 int psb_fbdev_init(struct drm_device *dev)
 634 {
 635         struct psb_fbdev *fbdev;
 636         struct drm_psb_private *dev_priv = dev->dev_private;
 637
 638         fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL);
 639         if (!fbdev) {
 640                 dev_err(dev->dev, "no memory\n");
 641                 return -ENOMEM;
 642         }
 643
 644         dev_priv->fbdev = fbdev;
 645         fbdev->psb_fb_helper.funcs = &psb_fb_helper_funcs;
 646
 647         drm_fb_helper_init(dev, &fbdev->psb_fb_helper, dev_priv->ops->crtcs,
 648                                                         INTELFB_CONN_LIMIT);
 649
 650         drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper);
 651         drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32);
 652         return 0;
 653 }
 654
 655 void psb_fbdev_fini(struct drm_device *dev)
 656 {
 657         struct drm_psb_private *dev_priv = dev->dev_private;
 658
 659         if (!dev_priv->fbdev)
 660                 return;
 661
 662         psb_fbdev_destroy(dev, dev_priv->fbdev);
 663         kfree(dev_priv->fbdev);
 664         dev_priv->fbdev = NULL;
 665 }
 666
 667 static void psbfb_output_poll_changed(struct drm_device *dev)
 668 {
 669         struct drm_psb_private *dev_priv = dev->dev_private;
 670         struct psb_fbdev *fbdev = (struct psb_fbdev *)dev_priv->fbdev;
 671         drm_fb_helper_hotplug_event(&fbdev->psb_fb_helper);
 672 }
 673
 674 /**
 675  *      psb_user_framebuffer_create_handle - add hamdle to a framebuffer
 676  *      @fb: framebuffer
 677  *      @file_priv: our DRM file
 678  *      @handle: returned handle
 679  *
 680  *      Our framebuffer object is a GTT range which also contains a GEM
 681  *      object. We need to turn it into a handle for userspace. GEM will do
 682  *      the work for us
 683  */
 684 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
 685                                               struct drm_file *file_priv,
 686                                               unsigned int *handle)
 687 {
 688         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 689         struct gtt_range *r = psbfb->gtt;
 690         return drm_gem_handle_create(file_priv, &r->gem, handle);
 691 }
 692
 693 /**
 694  *      psb_user_framebuffer_destroy    -       destruct user created fb
 695  *      @fb: framebuffer
 696  *
 697  *      User framebuffers are backed by GEM objects so all we have to do is
 698  *      clean up a bit and drop the reference, GEM will handle the fallout
 699  */
 700 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)
 701 {
 702         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 703         struct gtt_range *r = psbfb->gtt;
 704         struct drm_device *dev = fb->dev;
 705         struct drm_psb_private *dev_priv = dev->dev_private;
 706         struct psb_fbdev *fbdev = dev_priv->fbdev;
 707         struct drm_crtc *crtc;
 708         int reset = 0;
 709
 710         /* Should never get stolen memory for a user fb */
 711         WARN_ON(r->stolen);
 712
 713         /* Check if we are erroneously live */
 714         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 715                 if (crtc->fb == fb)
 716                         reset = 1;
 717
 718         if (reset)
 719                 /*
 720                  * Now force a sane response before we permit the DRM CRTC
 721                  * layer to do stupid things like blank the display. Instead
 722                  * we reset this framebuffer as if the user had forced a reset.
 723                  * We must do this before the cleanup so that the DRM layer
 724                  * doesn't get a chance to stick its oar in where it isn't
 725                  * wanted.
 726                  */
 727                 drm_fb_helper_restore_fbdev_mode(&fbdev->psb_fb_helper);
 728
 729         /* Let DRM do its clean up */
 730         drm_framebuffer_cleanup(fb);
 731         /*  We are no longer using the resource in GEM */
 732         drm_gem_object_unreference_unlocked(&r->gem);
 733         kfree(fb);
 734 }
 735
 736 static const struct drm_mode_config_funcs psb_mode_funcs = {
 737         .fb_create = psb_user_framebuffer_create,
 738         .output_poll_changed = psbfb_output_poll_changed,
 739 };
 740
 741 static int psb_create_backlight_property(struct drm_device *dev)
 742 {
 743         struct drm_psb_private *dev_priv = dev->dev_private;
 744         struct drm_property *backlight;
 745
 746         if (dev_priv->backlight_property)
 747                 return 0;
 748
 749         backlight = drm_property_create(dev, DRM_MODE_PROP_RANGE,
 750                                                         "backlight", 2);
 751         backlight->values[0] = 0;
 752         backlight->values[1] = 100;
 753
 754         dev_priv->backlight_property = backlight;
 755
 756         return 0;
 757 }
 758
 759 static void psb_setup_outputs(struct drm_device *dev)
 760 {
 761         struct drm_psb_private *dev_priv = dev->dev_private;
 762         struct drm_connector *connector;
 763
 764         drm_mode_create_scaling_mode_property(dev);
 765         psb_create_backlight_property(dev);
 766
 767         dev_priv->ops->output_init(dev);
 768
 769         list_for_each_entry(connector, &dev->mode_config.connector_list,
 770                             head) {
 771                 struct psb_intel_output *psb_intel_output =
 772                     to_psb_intel_output(connector);
 773                 struct drm_encoder *encoder = &psb_intel_output->enc;
 774                 int crtc_mask = 0, clone_mask = 0;
 775
 776                 /* valid crtcs */
 777                 switch (psb_intel_output->type) {
 778                 case INTEL_OUTPUT_ANALOG:
 779                         crtc_mask = (1 << 0);
 780                         clone_mask = (1 << INTEL_OUTPUT_ANALOG);
 781                         break;
 782                 case INTEL_OUTPUT_SDVO:
 783                         crtc_mask = ((1 << 0) | (1 << 1));
 784                         clone_mask = (1 << INTEL_OUTPUT_SDVO);
 785                         break;
 786                 case INTEL_OUTPUT_LVDS:
 787                         if (IS_MRST(dev))
 788                                 crtc_mask = (1 << 0);
 789                         else
 790                                 crtc_mask = (1 << 1);
 791                         clone_mask = (1 << INTEL_OUTPUT_LVDS);
 792                         break;
 793                 case INTEL_OUTPUT_MIPI:
 794                         crtc_mask = (1 << 0);
 795                         clone_mask = (1 << INTEL_OUTPUT_MIPI);
 796                         break;
 797                 case INTEL_OUTPUT_MIPI2:
 798                         crtc_mask = (1 << 2);
 799                         clone_mask = (1 << INTEL_OUTPUT_MIPI2);
 800                         break;
 801                 case INTEL_OUTPUT_HDMI:
 802                         /* HDMI on crtc 1 for SoC devices and crtc 0 for
 803                            Cedarview. HDMI on Poulsbo is only via external
 804                            logic */
 805                         if (IS_MFLD(dev) || IS_MRST(dev))
 806                                 crtc_mask = (1 << 1);
 807                         else
 808                                 crtc_mask = (1 << 0);   /* Cedarview */
 809                         clone_mask = (1 << INTEL_OUTPUT_HDMI);
 810                         break;
 811                 }
 812                 encoder->possible_crtcs = crtc_mask;
 813                 encoder->possible_clones =
 814                     psb_intel_connector_clones(dev, clone_mask);
 815         }
 816 }
 817
 818 void psb_modeset_init(struct drm_device *dev)
 819 {
 820         struct drm_psb_private *dev_priv =
 821             (struct drm_psb_private *) dev->dev_private;
 822         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 823         int i;
 824
 825         drm_mode_config_init(dev);
 826
 827         dev->mode_config.min_width = 0;
 828         dev->mode_config.min_height = 0;
 829
 830         dev->mode_config.funcs = (void *) &psb_mode_funcs;
 831
 832         /* set memory base */
 833         /* MRST and PSB should use BAR 2*/
 834         pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
 835                                         &(dev->mode_config.fb_base));
 836
 837         /* num pipes is 2 for PSB but 1 for Mrst */
 838         for (i = 0; i < dev_priv->num_pipe; i++)
 839                 psb_intel_crtc_init(dev, i, mode_dev);
 840
 841         dev->mode_config.max_width = 2048;
 842         dev->mode_config.max_height = 2048;
 843
 844         psb_setup_outputs(dev);
 845 }
 846
 847 void psb_modeset_cleanup(struct drm_device *dev)
 848 {
 849         mutex_lock(&dev->struct_mutex);
 850
 851         drm_kms_helper_poll_fini(dev);
 852         psb_fbdev_fini(dev);
 853         drm_mode_config_cleanup(dev);
 854
 855         mutex_unlock(&dev->struct_mutex);
 856 }