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