Pileus Git - ~andy/linux/blob - drivers/staging/gma500/psb_fb.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
  36 #include "psb_drv.h"
  37 #include "psb_intel_reg.h"
  38 #include "psb_intel_drv.h"
  39 #include "psb_fb.h"
  40
  41 #include "mdfld_output.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
  95 void psbfb_suspend(struct drm_device *dev)
  96 {
  97         struct drm_framebuffer *fb = 0;
  98         struct psb_framebuffer *psbfb = to_psb_fb(fb);
  99
 100         console_lock();
 101         mutex_lock(&dev->mode_config.mutex);
 102         list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
 103                 struct fb_info *info = psbfb->fbdev;
 104                 fb_set_suspend(info, 1);
 105                 drm_fb_helper_blank(FB_BLANK_POWERDOWN, info);
 106         }
 107         mutex_unlock(&dev->mode_config.mutex);
 108         console_unlock();
 109 }
 110
 111 void psbfb_resume(struct drm_device *dev)
 112 {
 113         struct drm_framebuffer *fb = 0;
 114         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 115
 116         console_lock();
 117         mutex_lock(&dev->mode_config.mutex);
 118         list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
 119                 struct fb_info *info = psbfb->fbdev;
 120                 fb_set_suspend(info, 0);
 121                 drm_fb_helper_blank(FB_BLANK_UNBLANK, info);
 122         }
 123         mutex_unlock(&dev->mode_config.mutex);
 124         console_unlock();
 125         drm_helper_disable_unused_functions(dev);
 126 }
 127
 128 static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 129 {
 130         struct psb_framebuffer *psbfb = vma->vm_private_data;
 131         struct drm_device *dev = psbfb->base.dev;
 132         struct drm_psb_private *dev_priv = dev->dev_private;
 133         int page_num;
 134         int i;
 135         unsigned long address;
 136         int ret;
 137         unsigned long pfn;
 138         /* FIXME: assumes fb at stolen base which may not be true */
 139         unsigned long phys_addr = (unsigned long)dev_priv->stolen_base;
 140
 141         page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
 142         address = (unsigned long)vmf->virtual_address;
 143
 144         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 145
 146         for (i = 0; i < page_num; i++) {
 147                 pfn = (phys_addr >> PAGE_SHIFT);
 148
 149                 ret = vm_insert_mixed(vma, address, pfn);
 150                 if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
 151                         break;
 152                 else if (unlikely(ret != 0)) {
 153                         ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
 154                         return ret;
 155                 }
 156                 address += PAGE_SIZE;
 157                 phys_addr += PAGE_SIZE;
 158         }
 159         return VM_FAULT_NOPAGE;
 160 }
 161
 162 static void psbfb_vm_open(struct vm_area_struct *vma)
 163 {
 164 }
 165
 166 static void psbfb_vm_close(struct vm_area_struct *vma)
 167 {
 168 }
 169
 170 static struct vm_operations_struct psbfb_vm_ops = {
 171         .fault  = psbfb_vm_fault,
 172         .open   = psbfb_vm_open,
 173         .close  = psbfb_vm_close
 174 };
 175
 176 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 177 {
 178         struct psb_fbdev *fbdev = info->par;
 179         struct psb_framebuffer *psbfb = &fbdev->pfb;
 180
 181         if (vma->vm_pgoff != 0)
 182                 return -EINVAL;
 183         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
 184                 return -EINVAL;
 185
 186         if (!psbfb->addr_space)
 187                 psbfb->addr_space = vma->vm_file->f_mapping;
 188         /*
 189          * If this is a GEM object then info->screen_base is the virtual
 190          * kernel remapping of the object. FIXME: Review if this is
 191          * suitable for our mmap work
 192          */
 193         vma->vm_ops = &psbfb_vm_ops;
 194         vma->vm_private_data = (void *)psbfb;
 195         vma->vm_flags |= VM_RESERVED | VM_IO |
 196                                         VM_MIXEDMAP | VM_DONTEXPAND;
 197         return 0;
 198 }
 199
 200 static int psbfb_ioctl(struct fb_info *info, unsigned int cmd,
 201                                                 unsigned long arg)
 202 {
 203         struct psb_fbdev *fbdev = info->par;
 204         struct psb_framebuffer *psbfb = &fbdev->pfb;
 205         struct drm_device *dev = psbfb->base.dev;
 206         struct drm_psb_private *dev_priv = dev->dev_private;
 207         u32 __user *p = (u32 __user *)arg;
 208         u32 l;
 209         u32 buf[32];
 210         switch (cmd) {
 211         case 0x12345678:
 212                 if (!capable(CAP_SYS_RAWIO))
 213                         return -EPERM;
 214                 if (!dev_priv->ops->accel_2d)
 215                         return -EOPNOTSUPP;
 216                 if (get_user(l, p))
 217                         return -EFAULT;
 218                 if (l > 32)
 219                         return -EMSGSIZE;
 220                 if (copy_from_user(buf, p + 1, l * sizeof(u32)))
 221                         return -EFAULT;
 222                 psbfb_2d_submit(dev_priv, buf, l);
 223                 return 0;
 224         default:
 225                 return -ENOTTY;
 226         }
 227 }
 228
 229 static struct fb_ops psbfb_ops = {
 230         .owner = THIS_MODULE,
 231         .fb_check_var = drm_fb_helper_check_var,
 232         .fb_set_par = drm_fb_helper_set_par,
 233         .fb_blank = drm_fb_helper_blank,
 234         .fb_setcolreg = psbfb_setcolreg,
 235         .fb_fillrect = cfb_fillrect,
 236         .fb_copyarea = psbfb_copyarea,
 237         .fb_imageblit = cfb_imageblit,
 238         .fb_mmap = psbfb_mmap,
 239         .fb_sync = psbfb_sync,
 240         .fb_ioctl = psbfb_ioctl,
 241 };
 242
 243 static struct fb_ops psbfb_unaccel_ops = {
 244         .owner = THIS_MODULE,
 245         .fb_check_var = drm_fb_helper_check_var,
 246         .fb_set_par = drm_fb_helper_set_par,
 247         .fb_blank = drm_fb_helper_blank,
 248         .fb_setcolreg = psbfb_setcolreg,
 249         .fb_fillrect = cfb_fillrect,
 250         .fb_copyarea = cfb_copyarea,
 251         .fb_imageblit = cfb_imageblit,
 252         .fb_mmap = psbfb_mmap,
 253         .fb_ioctl = psbfb_ioctl,
 254 };
 255
 256 /**
 257  *      psb_framebuffer_init    -       initialize a framebuffer
 258  *      @dev: our DRM device
 259  *      @fb: framebuffer to set up
 260  *      @mode_cmd: mode description
 261  *      @gt: backing object
 262  *
 263  *      Configure and fill in the boilerplate for our frame buffer. Return
 264  *      0 on success or an error code if we fail.
 265  */
 266 static int psb_framebuffer_init(struct drm_device *dev,
 267                                         struct psb_framebuffer *fb,
 268                                         struct drm_mode_fb_cmd *mode_cmd,
 269                                         struct gtt_range *gt)
 270 {
 271         int ret;
 272
 273         if (mode_cmd->pitch & 63)
 274                 return -EINVAL;
 275         switch (mode_cmd->bpp) {
 276         case 8:
 277         case 16:
 278         case 24:
 279         case 32:
 280                 break;
 281         default:
 282                 return -EINVAL;
 283         }
 284         ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
 285         if (ret) {
 286                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 287                 return ret;
 288         }
 289         drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
 290         fb->gtt = gt;
 291         return 0;
 292 }
 293
 294 /**
 295  *      psb_framebuffer_create  -       create a framebuffer backed by gt
 296  *      @dev: our DRM device
 297  *      @mode_cmd: the description of the requested mode
 298  *      @gt: the backing object
 299  *
 300  *      Create a framebuffer object backed by the gt, and fill in the
 301  *      boilerplate required
 302  *
 303  *      TODO: review object references
 304  */
 305
 306 static struct drm_framebuffer *psb_framebuffer_create
 307                         (struct drm_device *dev,
 308                          struct drm_mode_fb_cmd *mode_cmd,
 309                          struct gtt_range *gt)
 310 {
 311         struct psb_framebuffer *fb;
 312         int ret;
 313
 314         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 315         if (!fb)
 316                 return ERR_PTR(-ENOMEM);
 317
 318         ret = psb_framebuffer_init(dev, fb, mode_cmd, gt);
 319         if (ret) {
 320                 kfree(fb);
 321                 return ERR_PTR(ret);
 322         }
 323         return &fb->base;
 324 }
 325
 326 /**
 327  *      psbfb_alloc             -       allocate frame buffer memory
 328  *      @dev: the DRM device
 329  *      @aligned_size: space needed
 330  *
 331  *      Allocate the frame buffer. In the usual case we get a GTT range that
 332  *      is stolen memory backed and life is simple. If there isn't sufficient
 333  *      stolen memory or the system has no stolen memory we allocate a range
 334  *      and back it with a GEM object.
 335  *
 336  *      In this case the GEM object has no handle.
 337  *
 338  *      FIXME: console speed up - allocate twice the space if room and use
 339  *      hardware scrolling for acceleration.
 340  */
 341 static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
 342 {
 343         struct gtt_range *backing;
 344         /* Begin by trying to use stolen memory backing */
 345         backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1);
 346         if (backing) {
 347                 if (drm_gem_private_object_init(dev,
 348                                         &backing->gem, aligned_size) == 0)
 349                         return backing;
 350                 psb_gtt_free_range(dev, backing);
 351         }
 352         /* Next try using GEM host memory */
 353         backing = psb_gtt_alloc_range(dev, aligned_size, "fb(gem)", 0);
 354         if (backing == NULL)
 355                 return NULL;
 356
 357         /* Now back it with an object */
 358         if (drm_gem_object_init(dev, &backing->gem, aligned_size) != 0) {
 359                 psb_gtt_free_range(dev, backing);
 360                 return NULL;
 361         }
 362         return backing;
 363 }
 364
 365 /**
 366  *      psbfb_create            -       create a framebuffer
 367  *      @fbdev: the framebuffer device
 368  *      @sizes: specification of the layout
 369  *
 370  *      Create a framebuffer to the specifications provided
 371  */
 372 static int psbfb_create(struct psb_fbdev *fbdev,
 373                                 struct drm_fb_helper_surface_size *sizes)
 374 {
 375         struct drm_device *dev = fbdev->psb_fb_helper.dev;
 376         struct drm_psb_private *dev_priv = dev->dev_private;
 377         struct fb_info *info;
 378         struct drm_framebuffer *fb;
 379         struct psb_framebuffer *psbfb = &fbdev->pfb;
 380         struct drm_mode_fb_cmd mode_cmd;
 381         struct device *device = &dev->pdev->dev;
 382         int size;
 383         int ret;
 384         struct gtt_range *backing;
 385
 386         mode_cmd.width = sizes->surface_width;
 387         mode_cmd.height = sizes->surface_height;
 388         mode_cmd.bpp = sizes->surface_bpp;
 389
 390         /* No 24bit packed */
 391         if (mode_cmd.bpp == 24)
 392                 mode_cmd.bpp = 32;
 393
 394         /* HW requires pitch to be 64 byte aligned */
 395         mode_cmd.pitch =  ALIGN(mode_cmd.width * ((mode_cmd.bpp + 7) / 8), 64);
 396         mode_cmd.depth = sizes->surface_depth;
 397
 398         size = mode_cmd.pitch * mode_cmd.height;
 399         size = ALIGN(size, PAGE_SIZE);
 400
 401         /* Allocate the framebuffer in the GTT with stolen page backing */
 402         backing = psbfb_alloc(dev, size);
 403         if (backing == NULL)
 404                 return -ENOMEM;
 405
 406         mutex_lock(&dev->struct_mutex);
 407
 408         info = framebuffer_alloc(0, device);
 409         if (!info) {
 410                 ret = -ENOMEM;
 411                 goto out_err1;
 412         }
 413         info->par = fbdev;
 414
 415         ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);
 416         if (ret)
 417                 goto out_unref;
 418
 419         fb = &psbfb->base;
 420         psbfb->fbdev = info;
 421
 422         fbdev->psb_fb_helper.fb = fb;
 423         fbdev->psb_fb_helper.fbdev = info;
 424
 425         strcpy(info->fix.id, "psbfb");
 426
 427         info->flags = FBINFO_DEFAULT;
 428         /* No 2D engine */
 429         if (!dev_priv->ops->accel_2d)
 430                 info->fbops = &psbfb_unaccel_ops;
 431         else
 432                 info->fbops = &psbfb_ops;
 433
 434         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 435         if (ret) {
 436                 ret = -ENOMEM;
 437                 goto out_unref;
 438         }
 439
 440         info->fix.smem_start = dev->mode_config.fb_base;
 441         info->fix.smem_len = size;
 442
 443         if (backing->stolen) {
 444                 /* Accessed stolen memory directly */
 445                 info->screen_base = (char *)dev_priv->vram_addr +
 446                                                         backing->offset;
 447         } else {
 448                 /* Pin the pages into the GTT and create a mapping to them */
 449                 psb_gtt_pin(backing);
 450                 info->screen_base = vm_map_ram(backing->pages, backing->npage,
 451                                 -1, PAGE_KERNEL);
 452                 if (info->screen_base == NULL) {
 453                         psb_gtt_unpin(backing);
 454                         ret = -ENOMEM;
 455                         goto out_unref;
 456                 }
 457                 psbfb->vm_map = 1;
 458         }
 459         info->screen_size = size;
 460
 461         if (dev_priv->pg->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->pg->stolen_size;
 469         }
 470
 471         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 472         drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
 473                                 sizes->fb_width, sizes->fb_height);
 474
 475         info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
 476         info->fix.mmio_len = pci_resource_len(dev->pdev, 0);
 477
 478         info->pixmap.size = 64 * 1024;
 479         info->pixmap.buf_align = 8;
 480         info->pixmap.access_align = 32;
 481         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 482         info->pixmap.scan_align = 1;
 483
 484         dev_info(dev->dev, "allocated %dx%d fb\n",
 485                                         psbfb->base.width, psbfb->base.height);
 486
 487         mutex_unlock(&dev->struct_mutex);
 488         return 0;
 489 out_unref:
 490         if (backing->stolen)
 491                 psb_gtt_free_range(dev, backing);
 492         else {
 493                 if (psbfb->vm_map)
 494                         vm_unmap_ram(info->screen_base, backing->npage);
 495                 drm_gem_object_unreference(&backing->gem);
 496         }
 497 out_err1:
 498         mutex_unlock(&dev->struct_mutex);
 499         psb_gtt_free_range(dev, backing);
 500         return ret;
 501 }
 502
 503 /**
 504  *      psb_user_framebuffer_create     -       create framebuffer
 505  *      @dev: our DRM device
 506  *      @filp: client file
 507  *      @cmd: mode request
 508  *
 509  *      Create a new framebuffer backed by a userspace GEM object
 510  */
 511 static struct drm_framebuffer *psb_user_framebuffer_create
 512                         (struct drm_device *dev, struct drm_file *filp,
 513                          struct drm_mode_fb_cmd *cmd)
 514 {
 515         struct gtt_range *r;
 516         struct drm_gem_object *obj;
 517
 518         /*
 519          *      Find the GEM object and thus the gtt range object that is
 520          *      to back this space
 521          */
 522         obj = drm_gem_object_lookup(dev, filp, cmd->handle);
 523         if (obj == NULL)
 524                 return ERR_PTR(-ENOENT);
 525
 526         /* Let the core code do all the work */
 527         r = container_of(obj, struct gtt_range, gem);
 528         return psb_framebuffer_create(dev, cmd, r);
 529 }
 530
 531 static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 532                                                         u16 blue, int regno)
 533 {
 534 }
 535
 536 static void psbfb_gamma_get(struct drm_crtc *crtc, u16 *red,
 537                                         u16 *green, u16 *blue, int regno)
 538 {
 539 }
 540
 541 static int psbfb_probe(struct drm_fb_helper *helper,
 542                                 struct drm_fb_helper_surface_size *sizes)
 543 {
 544         struct psb_fbdev *psb_fbdev = (struct psb_fbdev *)helper;
 545         int new_fb = 0;
 546         int ret;
 547
 548         if (!helper->fb) {
 549                 ret = psbfb_create(psb_fbdev, sizes);
 550                 if (ret)
 551                         return ret;
 552                 new_fb = 1;
 553         }
 554         return new_fb;
 555 }
 556
 557 struct drm_fb_helper_funcs psb_fb_helper_funcs = {
 558         .gamma_set = psbfb_gamma_set,
 559         .gamma_get = psbfb_gamma_get,
 560         .fb_probe = psbfb_probe,
 561 };
 562
 563 int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
 564 {
 565         struct fb_info *info;
 566         struct psb_framebuffer *psbfb = &fbdev->pfb;
 567
 568         if (fbdev->psb_fb_helper.fbdev) {
 569                 info = fbdev->psb_fb_helper.fbdev;
 570
 571                 /* If this is our base framebuffer then kill any virtual map
 572                    for the framebuffer layer and unpin it */
 573                 if (psbfb->vm_map) {
 574                         vm_unmap_ram(info->screen_base, psbfb->gtt->npage);
 575                         psb_gtt_unpin(psbfb->gtt);
 576                 }
 577                 unregister_framebuffer(info);
 578                 if (info->cmap.len)
 579                         fb_dealloc_cmap(&info->cmap);
 580                 framebuffer_release(info);
 581         }
 582         drm_fb_helper_fini(&fbdev->psb_fb_helper);
 583         drm_framebuffer_cleanup(&psbfb->base);
 584
 585         if (psbfb->gtt)
 586                 drm_gem_object_unreference(&psbfb->gtt->gem);
 587         return 0;
 588 }
 589
 590 int psb_fbdev_init(struct drm_device *dev)
 591 {
 592         struct psb_fbdev *fbdev;
 593         struct drm_psb_private *dev_priv = dev->dev_private;
 594         int num_crtc;
 595
 596         fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL);
 597         if (!fbdev) {
 598                 dev_err(dev->dev, "no memory\n");
 599                 return -ENOMEM;
 600         }
 601
 602         dev_priv->fbdev = fbdev;
 603         fbdev->psb_fb_helper.funcs = &psb_fb_helper_funcs;
 604
 605         /* FIXME: check Medfield */
 606         num_crtc = 2;
 607
 608         drm_fb_helper_init(dev, &fbdev->psb_fb_helper, num_crtc,
 609                                                         INTELFB_CONN_LIMIT);
 610
 611         drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper);
 612         drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32);
 613         return 0;
 614 }
 615
 616 void psb_fbdev_fini(struct drm_device *dev)
 617 {
 618         struct drm_psb_private *dev_priv = dev->dev_private;
 619
 620         if (!dev_priv->fbdev)
 621                 return;
 622
 623         psb_fbdev_destroy(dev, dev_priv->fbdev);
 624         kfree(dev_priv->fbdev);
 625         dev_priv->fbdev = NULL;
 626 }
 627
 628 static void psbfb_output_poll_changed(struct drm_device *dev)
 629 {
 630         struct drm_psb_private *dev_priv = dev->dev_private;
 631         struct psb_fbdev *fbdev = (struct psb_fbdev *)dev_priv->fbdev;
 632         drm_fb_helper_hotplug_event(&fbdev->psb_fb_helper);
 633 }
 634
 635 /**
 636  *      psb_user_framebuffer_create_handle - add hamdle to a framebuffer
 637  *      @fb: framebuffer
 638  *      @file_priv: our DRM file
 639  *      @handle: returned handle
 640  *
 641  *      Our framebuffer object is a GTT range which also contains a GEM
 642  *      object. We need to turn it into a handle for userspace. GEM will do
 643  *      the work for us
 644  */
 645 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
 646                                               struct drm_file *file_priv,
 647                                               unsigned int *handle)
 648 {
 649         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 650         struct gtt_range *r = psbfb->gtt;
 651         return drm_gem_handle_create(file_priv, &r->gem, handle);
 652 }
 653
 654 /**
 655  *      psb_user_framebuffer_destroy    -       destruct user created fb
 656  *      @fb: framebuffer
 657  *
 658  *      User framebuffers are backed by GEM objects so all we have to do is
 659  *      clean up a bit and drop the reference, GEM will handle the fallout
 660  */
 661 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)
 662 {
 663         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 664         struct gtt_range *r = psbfb->gtt;
 665         struct drm_device *dev = fb->dev;
 666         struct drm_psb_private *dev_priv = dev->dev_private;
 667         struct psb_fbdev *fbdev = dev_priv->fbdev;
 668         struct drm_crtc *crtc;
 669         int reset = 0;
 670
 671         /* Should never get stolen memory for a user fb */
 672         WARN_ON(r->stolen);
 673
 674         /* Check if we are erroneously live */
 675         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 676                 if (crtc->fb == fb)
 677                         reset = 1;
 678
 679         if (reset)
 680                 /*
 681                  * Now force a sane response before we permit the DRM CRTC
 682                  * layer to do stupid things like blank the display. Instead
 683                  * we reset this framebuffer as if the user had forced a reset.
 684                  * We must do this before the cleanup so that the DRM layer
 685                  * doesn't get a chance to stick its oar in where it isn't
 686                  * wanted.
 687                  */
 688                 drm_fb_helper_restore_fbdev_mode(&fbdev->psb_fb_helper);
 689
 690         /* Let DRM do its clean up */
 691         drm_framebuffer_cleanup(fb);
 692         /*  We are no longer using the resource in GEM */
 693         drm_gem_object_unreference_unlocked(&r->gem);
 694         kfree(fb);
 695 }
 696
 697 static const struct drm_mode_config_funcs psb_mode_funcs = {
 698         .fb_create = psb_user_framebuffer_create,
 699         .output_poll_changed = psbfb_output_poll_changed,
 700 };
 701
 702 static int psb_create_backlight_property(struct drm_device *dev)
 703 {
 704         struct drm_psb_private *dev_priv = dev->dev_private;
 705         struct drm_property *backlight;
 706
 707         if (dev_priv->backlight_property)
 708                 return 0;
 709
 710         backlight = drm_property_create(dev, DRM_MODE_PROP_RANGE,
 711                                                         "backlight", 2);
 712         backlight->values[0] = 0;
 713         backlight->values[1] = 100;
 714
 715         dev_priv->backlight_property = backlight;
 716
 717         return 0;
 718 }
 719
 720 static void psb_setup_outputs(struct drm_device *dev)
 721 {
 722         struct drm_psb_private *dev_priv = dev->dev_private;
 723         struct drm_connector *connector;
 724
 725         drm_mode_create_scaling_mode_property(dev);
 726         psb_create_backlight_property(dev);
 727
 728         dev_priv->ops->output_init(dev);
 729
 730         list_for_each_entry(connector, &dev->mode_config.connector_list,
 731                             head) {
 732                 struct psb_intel_output *psb_intel_output =
 733                     to_psb_intel_output(connector);
 734                 struct drm_encoder *encoder = &psb_intel_output->enc;
 735                 int crtc_mask = 0, clone_mask = 0;
 736
 737                 /* valid crtcs */
 738                 switch (psb_intel_output->type) {
 739                 case INTEL_OUTPUT_SDVO:
 740                         crtc_mask = ((1 << 0) | (1 << 1));
 741                         clone_mask = (1 << INTEL_OUTPUT_SDVO);
 742                         break;
 743                 case INTEL_OUTPUT_LVDS:
 744                         if (IS_MRST(dev))
 745                                 crtc_mask = (1 << 0);
 746                         else
 747                                 crtc_mask = (1 << 1);
 748                         clone_mask = (1 << INTEL_OUTPUT_LVDS);
 749                         break;
 750                 case INTEL_OUTPUT_MIPI:
 751                         crtc_mask = (1 << 0);
 752                         clone_mask = (1 << INTEL_OUTPUT_MIPI);
 753                         break;
 754                 case INTEL_OUTPUT_MIPI2:
 755                         crtc_mask = (1 << 2);
 756                         clone_mask = (1 << INTEL_OUTPUT_MIPI2);
 757                         break;
 758                 case INTEL_OUTPUT_HDMI:
 759                         crtc_mask = (1 << 1);
 760                         clone_mask = (1 << INTEL_OUTPUT_HDMI);
 761                         break;
 762                 }
 763                 encoder->possible_crtcs = crtc_mask;
 764                 encoder->possible_clones =
 765                     psb_intel_connector_clones(dev, clone_mask);
 766         }
 767 }
 768
 769 void psb_modeset_init(struct drm_device *dev)
 770 {
 771         struct drm_psb_private *dev_priv =
 772             (struct drm_psb_private *) dev->dev_private;
 773         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 774         int i;
 775
 776         drm_mode_config_init(dev);
 777
 778         dev->mode_config.min_width = 0;
 779         dev->mode_config.min_height = 0;
 780
 781         dev->mode_config.funcs = (void *) &psb_mode_funcs;
 782
 783         /* set memory base */
 784         /* MRST and PSB should use BAR 2*/
 785         pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
 786                                         &(dev->mode_config.fb_base));
 787
 788         /* num pipes is 2 for PSB but 1 for Mrst */
 789         for (i = 0; i < dev_priv->num_pipe; i++)
 790                 psb_intel_crtc_init(dev, i, mode_dev);
 791
 792         dev->mode_config.max_width = 2048;
 793         dev->mode_config.max_height = 2048;
 794
 795         psb_setup_outputs(dev);
 796 }
 797
 798 void psb_modeset_cleanup(struct drm_device *dev)
 799 {
 800         mutex_lock(&dev->struct_mutex);
 801
 802         drm_kms_helper_poll_fini(dev);
 803         psb_fbdev_fini(dev);
 804         drm_mode_config_cleanup(dev);
 805
 806         mutex_unlock(&dev->struct_mutex);
 807 }