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