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/pfn_t.h>
  25 #include <linux/mm.h>
  26 #include <linux/tty.h>
  27 #include <linux/slab.h>
  28 #include <linux/delay.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 static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 115 {
 116         struct psb_framebuffer *psbfb = vma->vm_private_data;
 117         struct drm_device *dev = psbfb->base.dev;
 118         struct drm_psb_private *dev_priv = dev->dev_private;
 119         int page_num;
 120         int i;
 121         unsigned long address;
 122         int ret;
 123         unsigned long pfn;
 124         unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
 125                                   psbfb->gtt->offset;
 126
 127         page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
 128         address = (unsigned long)vmf->virtual_address - (vmf->pgoff << PAGE_SHIFT);
 129
 130         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 131
 132         for (i = 0; i < page_num; i++) {
 133                 pfn = (phys_addr >> PAGE_SHIFT);
 134
 135                 ret = vm_insert_mixed(vma, address,
 136                                 __pfn_to_pfn_t(pfn, PFN_DEV));
 137                 if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
 138                         break;
 139                 else if (unlikely(ret != 0)) {
 140                         ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
 141                         return ret;
 142                 }
 143                 address += PAGE_SIZE;
 144                 phys_addr += PAGE_SIZE;
 145         }
 146         return VM_FAULT_NOPAGE;
 147 }
 148
 149 static void psbfb_vm_open(struct vm_area_struct *vma)
 150 {
 151 }
 152
 153 static void psbfb_vm_close(struct vm_area_struct *vma)
 154 {
 155 }
 156
 157 static const struct vm_operations_struct psbfb_vm_ops = {
 158         .fault  = psbfb_vm_fault,
 159         .open   = psbfb_vm_open,
 160         .close  = psbfb_vm_close
 161 };
 162
 163 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 164 {
 165         struct psb_fbdev *fbdev = info->par;
 166         struct psb_framebuffer *psbfb = &fbdev->pfb;
 167
 168         if (vma->vm_pgoff != 0)
 169                 return -EINVAL;
 170         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
 171                 return -EINVAL;
 172
 173         if (!psbfb->addr_space)
 174                 psbfb->addr_space = vma->vm_file->f_mapping;
 175         /*
 176          * If this is a GEM object then info->screen_base is the virtual
 177          * kernel remapping of the object. FIXME: Review if this is
 178          * suitable for our mmap work
 179          */
 180         vma->vm_ops = &psbfb_vm_ops;
 181         vma->vm_private_data = (void *)psbfb;
 182         vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
 183         return 0;
 184 }
 185
 186 static struct fb_ops psbfb_ops = {
 187         .owner = THIS_MODULE,
 188         .fb_check_var = drm_fb_helper_check_var,
 189         .fb_set_par = drm_fb_helper_set_par,
 190         .fb_blank = drm_fb_helper_blank,
 191         .fb_setcolreg = psbfb_setcolreg,
 192         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 193         .fb_copyarea = psbfb_copyarea,
 194         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 195         .fb_mmap = psbfb_mmap,
 196         .fb_sync = psbfb_sync,
 197 };
 198
 199 static struct fb_ops psbfb_roll_ops = {
 200         .owner = THIS_MODULE,
 201         .fb_check_var = drm_fb_helper_check_var,
 202         .fb_set_par = drm_fb_helper_set_par,
 203         .fb_blank = drm_fb_helper_blank,
 204         .fb_setcolreg = psbfb_setcolreg,
 205         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 206         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 207         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 208         .fb_pan_display = psbfb_pan,
 209         .fb_mmap = psbfb_mmap,
 210 };
 211
 212 static struct fb_ops psbfb_unaccel_ops = {
 213         .owner = THIS_MODULE,
 214         .fb_check_var = drm_fb_helper_check_var,
 215         .fb_set_par = drm_fb_helper_set_par,
 216         .fb_blank = drm_fb_helper_blank,
 217         .fb_setcolreg = psbfb_setcolreg,
 218         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 219         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 220         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 221         .fb_mmap = psbfb_mmap,
 222 };
 223
 224 /**
 225  *      psb_framebuffer_init    -       initialize a framebuffer
 226  *      @dev: our DRM device
 227  *      @fb: framebuffer to set up
 228  *      @mode_cmd: mode description
 229  *      @gt: backing object
 230  *
 231  *      Configure and fill in the boilerplate for our frame buffer. Return
 232  *      0 on success or an error code if we fail.
 233  */
 234 static int psb_framebuffer_init(struct drm_device *dev,
 235                                         struct psb_framebuffer *fb,
 236                                         const struct drm_mode_fb_cmd2 *mode_cmd,
 237                                         struct gtt_range *gt)
 238 {
 239         u32 bpp, depth;
 240         int ret;
 241
 242         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 243
 244         if (mode_cmd->pitches[0] & 63)
 245                 return -EINVAL;
 246         switch (bpp) {
 247         case 8:
 248         case 16:
 249         case 24:
 250         case 32:
 251                 break;
 252         default:
 253                 return -EINVAL;
 254         }
 255         drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
 256         fb->gtt = gt;
 257         ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
 258         if (ret) {
 259                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 260                 return ret;
 261         }
 262         return 0;
 263 }
 264
 265 /**
 266  *      psb_framebuffer_create  -       create a framebuffer backed by gt
 267  *      @dev: our DRM device
 268  *      @mode_cmd: the description of the requested mode
 269  *      @gt: the backing object
 270  *
 271  *      Create a framebuffer object backed by the gt, and fill in the
 272  *      boilerplate required
 273  *
 274  *      TODO: review object references
 275  */
 276
 277 static struct drm_framebuffer *psb_framebuffer_create
 278                         (struct drm_device *dev,
 279                          const struct drm_mode_fb_cmd2 *mode_cmd,
 280                          struct gtt_range *gt)
 281 {
 282         struct psb_framebuffer *fb;
 283         int ret;
 284
 285         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 286         if (!fb)
 287                 return ERR_PTR(-ENOMEM);
 288
 289         ret = psb_framebuffer_init(dev, fb, mode_cmd, gt);
 290         if (ret) {
 291                 kfree(fb);
 292                 return ERR_PTR(ret);
 293         }
 294         return &fb->base;
 295 }
 296
 297 /**
 298  *      psbfb_alloc             -       allocate frame buffer memory
 299  *      @dev: the DRM device
 300  *      @aligned_size: space needed
 301  *      @force: fall back to GEM buffers if need be
 302  *
 303  *      Allocate the frame buffer. In the usual case we get a GTT range that
 304  *      is stolen memory backed and life is simple. If there isn't sufficient
 305  *      we fail as we don't have the virtual mapping space to really vmap it
 306  *      and the kernel console code can't handle non linear framebuffers.
 307  *
 308  *      Re-address this as and if the framebuffer layer grows this ability.
 309  */
 310 static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
 311 {
 312         struct gtt_range *backing;
 313         /* Begin by trying to use stolen memory backing */
 314         backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1, PAGE_SIZE);
 315         if (backing) {
 316                 drm_gem_private_object_init(dev, &backing->gem, aligned_size);
 317                 return backing;
 318         }
 319         return NULL;
 320 }
 321
 322 /**
 323  *      psbfb_create            -       create a framebuffer
 324  *      @fbdev: the framebuffer device
 325  *      @sizes: specification of the layout
 326  *
 327  *      Create a framebuffer to the specifications provided
 328  */
 329 static int psbfb_create(struct psb_fbdev *fbdev,
 330                                 struct drm_fb_helper_surface_size *sizes)
 331 {
 332         struct drm_device *dev = fbdev->psb_fb_helper.dev;
 333         struct drm_psb_private *dev_priv = dev->dev_private;
 334         struct fb_info *info;
 335         struct drm_framebuffer *fb;
 336         struct psb_framebuffer *psbfb = &fbdev->pfb;
 337         struct drm_mode_fb_cmd2 mode_cmd;
 338         int size;
 339         int ret;
 340         struct gtt_range *backing;
 341         u32 bpp, depth;
 342         int gtt_roll = 0;
 343         int pitch_lines = 0;
 344
 345         mode_cmd.width = sizes->surface_width;
 346         mode_cmd.height = sizes->surface_height;
 347         bpp = sizes->surface_bpp;
 348         depth = sizes->surface_depth;
 349
 350         /* No 24bit packed */
 351         if (bpp == 24)
 352                 bpp = 32;
 353
 354         do {
 355                 /*
 356                  * Acceleration via the GTT requires pitch to be
 357                  * power of two aligned. Preferably page but less
 358                  * is ok with some fonts
 359                  */
 360                 mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines);
 361
 362                 size = mode_cmd.pitches[0] * mode_cmd.height;
 363                 size = ALIGN(size, PAGE_SIZE);
 364
 365                 /* Allocate the fb in the GTT with stolen page backing */
 366                 backing = psbfb_alloc(dev, size);
 367
 368                 if (pitch_lines)
 369                         pitch_lines *= 2;
 370                 else
 371                         pitch_lines = 1;
 372                 gtt_roll++;
 373         } while (backing == NULL && pitch_lines <= 16);
 374
 375         /* The final pitch we accepted if we succeeded */
 376         pitch_lines /= 2;
 377
 378         if (backing == NULL) {
 379                 /*
 380                  *      We couldn't get the space we wanted, fall back to the
 381                  *      display engine requirement instead.  The HW requires
 382                  *      the pitch to be 64 byte aligned
 383                  */
 384
 385                 gtt_roll = 0;   /* Don't use GTT accelerated scrolling */
 386                 pitch_lines = 64;
 387
 388                 mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);
 389
 390                 size = mode_cmd.pitches[0] * mode_cmd.height;
 391                 size = ALIGN(size, PAGE_SIZE);
 392
 393                 /* Allocate the framebuffer in the GTT with stolen page backing */
 394                 backing = psbfb_alloc(dev, size);
 395                 if (backing == NULL)
 396                         return -ENOMEM;
 397         }
 398
 399         memset(dev_priv->vram_addr + backing->offset, 0, size);
 400
 401         info = drm_fb_helper_alloc_fbi(&fbdev->psb_fb_helper);
 402         if (IS_ERR(info)) {
 403                 ret = PTR_ERR(info);
 404                 goto err_free_range;
 405         }
 406         info->par = fbdev;
 407
 408         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 409
 410         ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);
 411         if (ret)
 412                 goto err_release;
 413
 414         fb = &psbfb->base;
 415         psbfb->fbdev = info;
 416
 417         fbdev->psb_fb_helper.fb = fb;
 418
 419         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 420         strcpy(info->fix.id, "psbdrmfb");
 421
 422         info->flags = FBINFO_DEFAULT;
 423         if (dev_priv->ops->accel_2d && pitch_lines > 8) /* 2D engine */
 424                 info->fbops = &psbfb_ops;
 425         else if (gtt_roll) {    /* GTT rolling seems best */
 426                 info->fbops = &psbfb_roll_ops;
 427                 info->flags |= FBINFO_HWACCEL_YPAN;
 428         } else  /* Software */
 429                 info->fbops = &psbfb_unaccel_ops;
 430
 431         info->fix.smem_start = dev->mode_config.fb_base;
 432         info->fix.smem_len = size;
 433         info->fix.ywrapstep = gtt_roll;
 434         info->fix.ypanstep = 0;
 435
 436         /* Accessed stolen memory directly */
 437         info->screen_base = dev_priv->vram_addr + backing->offset;
 438         info->screen_size = size;
 439
 440         if (dev_priv->gtt.stolen_size) {
 441                 info->apertures->ranges[0].base = dev->mode_config.fb_base;
 442                 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
 443         }
 444
 445         drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
 446                                 sizes->fb_width, sizes->fb_height);
 447
 448         info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
 449         info->fix.mmio_len = pci_resource_len(dev->pdev, 0);
 450
 451         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 452
 453         dev_dbg(dev->dev, "allocated %dx%d fb\n",
 454                                         psbfb->base.width, psbfb->base.height);
 455
 456         return 0;
 457 err_release:
 458         drm_fb_helper_release_fbi(&fbdev->psb_fb_helper);
 459 err_free_range:
 460         psb_gtt_free_range(dev, backing);
 461         return ret;
 462 }
 463
 464 /**
 465  *      psb_user_framebuffer_create     -       create framebuffer
 466  *      @dev: our DRM device
 467  *      @filp: client file
 468  *      @cmd: mode request
 469  *
 470  *      Create a new framebuffer backed by a userspace GEM object
 471  */
 472 static struct drm_framebuffer *psb_user_framebuffer_create
 473                         (struct drm_device *dev, struct drm_file *filp,
 474                          const struct drm_mode_fb_cmd2 *cmd)
 475 {
 476         struct gtt_range *r;
 477         struct drm_gem_object *obj;
 478
 479         /*
 480          *      Find the GEM object and thus the gtt range object that is
 481          *      to back this space
 482          */
 483         obj = drm_gem_object_lookup(filp, cmd->handles[0]);
 484         if (obj == NULL)
 485                 return ERR_PTR(-ENOENT);
 486
 487         /* Let the core code do all the work */
 488         r = container_of(obj, struct gtt_range, gem);
 489         return psb_framebuffer_create(dev, cmd, r);
 490 }
 491
 492 static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 493                                                         u16 blue, int regno)
 494 {
 495         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 496
 497         gma_crtc->lut_r[regno] = red >> 8;
 498         gma_crtc->lut_g[regno] = green >> 8;
 499         gma_crtc->lut_b[regno] = blue >> 8;
 500 }
 501
 502 static void psbfb_gamma_get(struct drm_crtc *crtc, u16 *red,
 503                                         u16 *green, u16 *blue, int regno)
 504 {
 505         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 506
 507         *red = gma_crtc->lut_r[regno] << 8;
 508         *green = gma_crtc->lut_g[regno] << 8;
 509         *blue = gma_crtc->lut_b[regno] << 8;
 510 }
 511
 512 static int psbfb_probe(struct drm_fb_helper *helper,
 513                                 struct drm_fb_helper_surface_size *sizes)
 514 {
 515         struct psb_fbdev *psb_fbdev =
 516                 container_of(helper, struct psb_fbdev, psb_fb_helper);
 517         struct drm_device *dev = psb_fbdev->psb_fb_helper.dev;
 518         struct drm_psb_private *dev_priv = dev->dev_private;
 519         unsigned int fb_size;
 520         int bytespp;
 521
 522         bytespp = sizes->surface_bpp / 8;
 523         if (bytespp == 3)       /* no 24bit packed */
 524                 bytespp = 4;
 525
 526         /* If the mode will not fit in 32bit then switch to 16bit to get
 527            a console on full resolution. The X mode setting server will
 528            allocate its own 32bit GEM framebuffer */
 529         fb_size = ALIGN(sizes->surface_width * bytespp, 64) *
 530                   sizes->surface_height;
 531         fb_size = ALIGN(fb_size, PAGE_SIZE);
 532
 533         if (fb_size > dev_priv->vram_stolen_size) {
 534                 sizes->surface_bpp = 16;
 535                 sizes->surface_depth = 16;
 536         }
 537
 538         return psbfb_create(psb_fbdev, sizes);
 539 }
 540
 541 static const struct drm_fb_helper_funcs psb_fb_helper_funcs = {
 542         .gamma_set = psbfb_gamma_set,
 543         .gamma_get = psbfb_gamma_get,
 544         .fb_probe = psbfb_probe,
 545 };
 546
 547 static int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
 548 {
 549         struct psb_framebuffer *psbfb = &fbdev->pfb;
 550
 551         drm_fb_helper_unregister_fbi(&fbdev->psb_fb_helper);
 552         drm_fb_helper_release_fbi(&fbdev->psb_fb_helper);
 553
 554         drm_fb_helper_fini(&fbdev->psb_fb_helper);
 555         drm_framebuffer_unregister_private(&psbfb->base);
 556         drm_framebuffer_cleanup(&psbfb->base);
 557
 558         if (psbfb->gtt)
 559                 drm_gem_object_unreference_unlocked(&psbfb->gtt->gem);
 560         return 0;
 561 }
 562
 563 int psb_fbdev_init(struct drm_device *dev)
 564 {
 565         struct psb_fbdev *fbdev;
 566         struct drm_psb_private *dev_priv = dev->dev_private;
 567         int ret;
 568
 569         fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL);
 570         if (!fbdev) {
 571                 dev_err(dev->dev, "no memory\n");
 572                 return -ENOMEM;
 573         }
 574
 575         dev_priv->fbdev = fbdev;
 576
 577         drm_fb_helper_prepare(dev, &fbdev->psb_fb_helper, &psb_fb_helper_funcs);
 578
 579         ret = drm_fb_helper_init(dev, &fbdev->psb_fb_helper,
 580                                  dev_priv->ops->crtcs, INTELFB_CONN_LIMIT);
 581         if (ret)
 582                 goto free;
 583
 584         ret = drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper);
 585         if (ret)
 586                 goto fini;
 587
 588         /* disable all the possible outputs/crtcs before entering KMS mode */
 589         drm_helper_disable_unused_functions(dev);
 590
 591         ret = drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32);
 592         if (ret)
 593                 goto fini;
 594
 595         return 0;
 596
 597 fini:
 598         drm_fb_helper_fini(&fbdev->psb_fb_helper);
 599 free:
 600         kfree(fbdev);
 601         return ret;
 602 }
 603
 604 static void psb_fbdev_fini(struct drm_device *dev)
 605 {
 606         struct drm_psb_private *dev_priv = dev->dev_private;
 607
 608         if (!dev_priv->fbdev)
 609                 return;
 610
 611         psb_fbdev_destroy(dev, dev_priv->fbdev);
 612         kfree(dev_priv->fbdev);
 613         dev_priv->fbdev = NULL;
 614 }
 615
 616 static void psbfb_output_poll_changed(struct drm_device *dev)
 617 {
 618         struct drm_psb_private *dev_priv = dev->dev_private;
 619         struct psb_fbdev *fbdev = (struct psb_fbdev *)dev_priv->fbdev;
 620         drm_fb_helper_hotplug_event(&fbdev->psb_fb_helper);
 621 }
 622
 623 /**
 624  *      psb_user_framebuffer_create_handle - add hamdle to a framebuffer
 625  *      @fb: framebuffer
 626  *      @file_priv: our DRM file
 627  *      @handle: returned handle
 628  *
 629  *      Our framebuffer object is a GTT range which also contains a GEM
 630  *      object. We need to turn it into a handle for userspace. GEM will do
 631  *      the work for us
 632  */
 633 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
 634                                               struct drm_file *file_priv,
 635                                               unsigned int *handle)
 636 {
 637         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 638         struct gtt_range *r = psbfb->gtt;
 639         return drm_gem_handle_create(file_priv, &r->gem, handle);
 640 }
 641
 642 /**
 643  *      psb_user_framebuffer_destroy    -       destruct user created fb
 644  *      @fb: framebuffer
 645  *
 646  *      User framebuffers are backed by GEM objects so all we have to do is
 647  *      clean up a bit and drop the reference, GEM will handle the fallout
 648  */
 649 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)
 650 {
 651         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 652         struct gtt_range *r = psbfb->gtt;
 653
 654         /* Let DRM do its clean up */
 655         drm_framebuffer_cleanup(fb);
 656         /*  We are no longer using the resource in GEM */
 657         drm_gem_object_unreference_unlocked(&r->gem);
 658         kfree(fb);
 659 }
 660
 661 static const struct drm_mode_config_funcs psb_mode_funcs = {
 662         .fb_create = psb_user_framebuffer_create,
 663         .output_poll_changed = psbfb_output_poll_changed,
 664 };
 665
 666 static void psb_setup_outputs(struct drm_device *dev)
 667 {
 668         struct drm_psb_private *dev_priv = dev->dev_private;
 669         struct drm_connector *connector;
 670
 671         drm_mode_create_scaling_mode_property(dev);
 672
 673         /* It is ok for this to fail - we just don't get backlight control */
 674         if (!dev_priv->backlight_property)
 675                 dev_priv->backlight_property = drm_property_create_range(dev, 0,
 676                                                         "backlight", 0, 100);
 677         dev_priv->ops->output_init(dev);
 678
 679         list_for_each_entry(connector, &dev->mode_config.connector_list,
 680                             head) {
 681                 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 682                 struct drm_encoder *encoder = &gma_encoder->base;
 683                 int crtc_mask = 0, clone_mask = 0;
 684
 685                 /* valid crtcs */
 686                 switch (gma_encoder->type) {
 687                 case INTEL_OUTPUT_ANALOG:
 688                         crtc_mask = (1 << 0);
 689                         clone_mask = (1 << INTEL_OUTPUT_ANALOG);
 690                         break;
 691                 case INTEL_OUTPUT_SDVO:
 692                         crtc_mask = dev_priv->ops->sdvo_mask;
 693                         clone_mask = (1 << INTEL_OUTPUT_SDVO);
 694                         break;
 695                 case INTEL_OUTPUT_LVDS:
 696                         crtc_mask = dev_priv->ops->lvds_mask;
 697                         clone_mask = (1 << INTEL_OUTPUT_LVDS);
 698                         break;
 699                 case INTEL_OUTPUT_MIPI:
 700                         crtc_mask = (1 << 0);
 701                         clone_mask = (1 << INTEL_OUTPUT_MIPI);
 702                         break;
 703                 case INTEL_OUTPUT_MIPI2:
 704                         crtc_mask = (1 << 2);
 705                         clone_mask = (1 << INTEL_OUTPUT_MIPI2);
 706                         break;
 707                 case INTEL_OUTPUT_HDMI:
 708                         crtc_mask = dev_priv->ops->hdmi_mask;
 709                         clone_mask = (1 << INTEL_OUTPUT_HDMI);
 710                         break;
 711                 case INTEL_OUTPUT_DISPLAYPORT:
 712                         crtc_mask = (1 << 0) | (1 << 1);
 713                         clone_mask = (1 << INTEL_OUTPUT_DISPLAYPORT);
 714                         break;
 715                 case INTEL_OUTPUT_EDP:
 716                         crtc_mask = (1 << 1);
 717                         clone_mask = (1 << INTEL_OUTPUT_EDP);
 718                 }
 719                 encoder->possible_crtcs = crtc_mask;
 720                 encoder->possible_clones =
 721                     gma_connector_clones(dev, clone_mask);
 722         }
 723 }
 724
 725 void psb_modeset_init(struct drm_device *dev)
 726 {
 727         struct drm_psb_private *dev_priv = dev->dev_private;
 728         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 729         int i;
 730
 731         drm_mode_config_init(dev);
 732
 733         dev->mode_config.min_width = 0;
 734         dev->mode_config.min_height = 0;
 735
 736         dev->mode_config.funcs = &psb_mode_funcs;
 737
 738         /* set memory base */
 739         /* Oaktrail and Poulsbo should use BAR 2*/
 740         pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
 741                                         &(dev->mode_config.fb_base));
 742
 743         /* num pipes is 2 for PSB but 1 for Mrst */
 744         for (i = 0; i < dev_priv->num_pipe; i++)
 745                 psb_intel_crtc_init(dev, i, mode_dev);
 746
 747         dev->mode_config.max_width = 4096;
 748         dev->mode_config.max_height = 4096;
 749
 750         psb_setup_outputs(dev);
 751
 752         if (dev_priv->ops->errata)
 753                 dev_priv->ops->errata(dev);
 754
 755         dev_priv->modeset = true;
 756 }
 757
 758 void psb_modeset_cleanup(struct drm_device *dev)
 759 {
 760         struct drm_psb_private *dev_priv = dev->dev_private;
 761         if (dev_priv->modeset) {
 762                 drm_kms_helper_poll_fini(dev);
 763                 psb_fbdev_fini(dev);
 764                 drm_mode_config_cleanup(dev);
 765         }
 766 }