drivers/gpu/drm/gma500/framebuffer.c

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