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 void psbfb_suspend(struct drm_device *dev)
 115 {
 116         struct drm_framebuffer *fb;
 117
 118         console_lock();
 119         mutex_lock(&dev->mode_config.mutex);
 120         list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
 121                 struct psb_framebuffer *psbfb = to_psb_fb(fb);
 122                 struct fb_info *info = psbfb->fbdev;
 123                 fb_set_suspend(info, 1);
 124                 drm_fb_helper_blank(FB_BLANK_POWERDOWN, info);
 125         }
 126         mutex_unlock(&dev->mode_config.mutex);
 127         console_unlock();
 128 }
 129
 130 void psbfb_resume(struct drm_device *dev)
 131 {
 132         struct drm_framebuffer *fb;
 133
 134         console_lock();
 135         mutex_lock(&dev->mode_config.mutex);
 136         list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
 137                 struct psb_framebuffer *psbfb = to_psb_fb(fb);
 138                 struct fb_info *info = psbfb->fbdev;
 139                 fb_set_suspend(info, 0);
 140                 drm_fb_helper_blank(FB_BLANK_UNBLANK, info);
 141         }
 142         mutex_unlock(&dev->mode_config.mutex);
 143         console_unlock();
 144         drm_helper_disable_unused_functions(dev);
 145 }
 146
 147 static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 148 {
 149         struct psb_framebuffer *psbfb = vma->vm_private_data;
 150         struct drm_device *dev = psbfb->base.dev;
 151         struct drm_psb_private *dev_priv = dev->dev_private;
 152         int page_num;
 153         int i;
 154         unsigned long address;
 155         int ret;
 156         unsigned long pfn;
 157         /* FIXME: assumes fb at stolen base which may not be true */
 158         unsigned long phys_addr = (unsigned long)dev_priv->stolen_base;
 159
 160         page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
 161         address = (unsigned long)vmf->virtual_address;
 162
 163         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 164
 165         for (i = 0; i < page_num; i++) {
 166                 pfn = (phys_addr >> PAGE_SHIFT);
 167
 168                 ret = vm_insert_mixed(vma, address, pfn);
 169                 if (unlikely((ret == -EBUSY) || (ret != 0 && i > 0)))
 170                         break;
 171                 else if (unlikely(ret != 0)) {
 172                         ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
 173                         return ret;
 174                 }
 175                 address += PAGE_SIZE;
 176                 phys_addr += PAGE_SIZE;
 177         }
 178         return VM_FAULT_NOPAGE;
 179 }
 180
 181 static void psbfb_vm_open(struct vm_area_struct *vma)
 182 {
 183 }
 184
 185 static void psbfb_vm_close(struct vm_area_struct *vma)
 186 {
 187 }
 188
 189 static struct vm_operations_struct psbfb_vm_ops = {
 190         .fault  = psbfb_vm_fault,
 191         .open   = psbfb_vm_open,
 192         .close  = psbfb_vm_close
 193 };
 194
 195 static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 196 {
 197         struct psb_fbdev *fbdev = info->par;
 198         struct psb_framebuffer *psbfb = &fbdev->pfb;
 199
 200         if (vma->vm_pgoff != 0)
 201                 return -EINVAL;
 202         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
 203                 return -EINVAL;
 204
 205         if (!psbfb->addr_space)
 206                 psbfb->addr_space = vma->vm_file->f_mapping;
 207         /*
 208          * If this is a GEM object then info->screen_base is the virtual
 209          * kernel remapping of the object. FIXME: Review if this is
 210          * suitable for our mmap work
 211          */
 212         vma->vm_ops = &psbfb_vm_ops;
 213         vma->vm_private_data = (void *)psbfb;
 214         vma->vm_flags |= VM_RESERVED | VM_IO |
 215                                         VM_MIXEDMAP | VM_DONTEXPAND;
 216         return 0;
 217 }
 218
 219 static int psbfb_ioctl(struct fb_info *info, unsigned int cmd,
 220                                                 unsigned long arg)
 221 {
 222         return -ENOTTY;
 223 }
 224
 225 static struct fb_ops psbfb_ops = {
 226         .owner = THIS_MODULE,
 227         .fb_check_var = drm_fb_helper_check_var,
 228         .fb_set_par = drm_fb_helper_set_par,
 229         .fb_blank = drm_fb_helper_blank,
 230         .fb_setcolreg = psbfb_setcolreg,
 231         .fb_fillrect = cfb_fillrect,
 232         .fb_copyarea = psbfb_copyarea,
 233         .fb_imageblit = cfb_imageblit,
 234         .fb_mmap = psbfb_mmap,
 235         .fb_sync = psbfb_sync,
 236         .fb_ioctl = psbfb_ioctl,
 237 };
 238
 239 static struct fb_ops psbfb_roll_ops = {
 240         .owner = THIS_MODULE,
 241         .fb_check_var = drm_fb_helper_check_var,
 242         .fb_set_par = drm_fb_helper_set_par,
 243         .fb_blank = drm_fb_helper_blank,
 244         .fb_setcolreg = psbfb_setcolreg,
 245         .fb_fillrect = cfb_fillrect,
 246         .fb_copyarea = cfb_copyarea,
 247         .fb_imageblit = cfb_imageblit,
 248         .fb_pan_display = psbfb_pan,
 249         .fb_mmap = psbfb_mmap,
 250         .fb_ioctl = psbfb_ioctl,
 251 };
 252
 253 static struct fb_ops psbfb_unaccel_ops = {
 254         .owner = THIS_MODULE,
 255         .fb_check_var = drm_fb_helper_check_var,
 256         .fb_set_par = drm_fb_helper_set_par,
 257         .fb_blank = drm_fb_helper_blank,
 258         .fb_setcolreg = psbfb_setcolreg,
 259         .fb_fillrect = cfb_fillrect,
 260         .fb_copyarea = cfb_copyarea,
 261         .fb_imageblit = cfb_imageblit,
 262         .fb_mmap = psbfb_mmap,
 263         .fb_ioctl = psbfb_ioctl,
 264 };
 265
 266 /**
 267  *      psb_framebuffer_init    -       initialize a framebuffer
 268  *      @dev: our DRM device
 269  *      @fb: framebuffer to set up
 270  *      @mode_cmd: mode description
 271  *      @gt: backing object
 272  *
 273  *      Configure and fill in the boilerplate for our frame buffer. Return
 274  *      0 on success or an error code if we fail.
 275  */
 276 static int psb_framebuffer_init(struct drm_device *dev,
 277                                         struct psb_framebuffer *fb,
 278                                         struct drm_mode_fb_cmd2 *mode_cmd,
 279                                         struct gtt_range *gt)
 280 {
 281         u32 bpp, depth;
 282         int ret;
 283
 284         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 285
 286         if (mode_cmd->pitches[0] & 63)
 287                 return -EINVAL;
 288         switch (bpp) {
 289         case 8:
 290         case 16:
 291         case 24:
 292         case 32:
 293                 break;
 294         default:
 295                 return -EINVAL;
 296         }
 297         ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
 298         if (ret) {
 299                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 300                 return ret;
 301         }
 302         drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
 303         fb->gtt = gt;
 304         return 0;
 305 }
 306
 307 /**
 308  *      psb_framebuffer_create  -       create a framebuffer backed by gt
 309  *      @dev: our DRM device
 310  *      @mode_cmd: the description of the requested mode
 311  *      @gt: the backing object
 312  *
 313  *      Create a framebuffer object backed by the gt, and fill in the
 314  *      boilerplate required
 315  *
 316  *      TODO: review object references
 317  */
 318
 319 static struct drm_framebuffer *psb_framebuffer_create
 320                         (struct drm_device *dev,
 321                          struct drm_mode_fb_cmd2 *mode_cmd,
 322                          struct gtt_range *gt)
 323 {
 324         struct psb_framebuffer *fb;
 325         int ret;
 326
 327         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 328         if (!fb)
 329                 return ERR_PTR(-ENOMEM);
 330
 331         ret = psb_framebuffer_init(dev, fb, mode_cmd, gt);
 332         if (ret) {
 333                 kfree(fb);
 334                 return ERR_PTR(ret);
 335         }
 336         return &fb->base;
 337 }
 338
 339 /**
 340  *      psbfb_alloc             -       allocate frame buffer memory
 341  *      @dev: the DRM device
 342  *      @aligned_size: space needed
 343  *      @force: fall back to GEM buffers if need be
 344  *
 345  *      Allocate the frame buffer. In the usual case we get a GTT range that
 346  *      is stolen memory backed and life is simple. If there isn't sufficient
 347  *      we fail as we don't have the virtual mapping space to really vmap it
 348  *      and the kernel console code can't handle non linear framebuffers.
 349  *
 350  *      Re-address this as and if the framebuffer layer grows this ability.
 351  */
 352 static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
 353 {
 354         struct gtt_range *backing;
 355         /* Begin by trying to use stolen memory backing */
 356         backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1);
 357         if (backing) {
 358                 if (drm_gem_private_object_init(dev,
 359                                         &backing->gem, aligned_size) == 0)
 360                         return backing;
 361                 psb_gtt_free_range(dev, backing);
 362         }
 363         return NULL;
 364 }
 365
 366 /**
 367  *      psbfb_create            -       create a framebuffer
 368  *      @fbdev: the framebuffer device
 369  *      @sizes: specification of the layout
 370  *
 371  *      Create a framebuffer to the specifications provided
 372  */
 373 static int psbfb_create(struct psb_fbdev *fbdev,
 374                                 struct drm_fb_helper_surface_size *sizes)
 375 {
 376         struct drm_device *dev = fbdev->psb_fb_helper.dev;
 377         struct drm_psb_private *dev_priv = dev->dev_private;
 378         struct fb_info *info;
 379         struct drm_framebuffer *fb;
 380         struct psb_framebuffer *psbfb = &fbdev->pfb;
 381         struct drm_mode_fb_cmd2 mode_cmd;
 382         struct device *device = &dev->pdev->dev;
 383         int size;
 384         int ret;
 385         struct gtt_range *backing;
 386         u32 bpp, depth;
 387         int gtt_roll = 0;
 388         int pitch_lines = 0;
 389
 390         mode_cmd.width = sizes->surface_width;
 391         mode_cmd.height = sizes->surface_height;
 392         bpp = sizes->surface_bpp;
 393
 394         /* No 24bit packed */
 395         if (bpp == 24)
 396                 bpp = 32;
 397
 398         do {
 399                 /*
 400                  * Acceleration via the GTT requires pitch to be
 401                  * power of two aligned. Preferably page but less
 402                  * is ok with some fonts
 403                  */
 404                 mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines);
 405                 depth = sizes->surface_depth;
 406
 407                 size = mode_cmd.pitches[0] * mode_cmd.height;
 408                 size = ALIGN(size, PAGE_SIZE);
 409
 410                 /* Allocate the fb in the GTT with stolen page backing */
 411                 backing = psbfb_alloc(dev, size);
 412
 413                 if (pitch_lines)
 414                         pitch_lines *= 2;
 415                 else
 416                         pitch_lines = 1;
 417                 gtt_roll++;
 418         } while (backing == NULL && pitch_lines <= 16);
 419
 420         /* The final pitch we accepted if we succeeded */
 421         pitch_lines /= 2;
 422
 423         if (backing == NULL) {
 424                 /*
 425                  *      We couldn't get the space we wanted, fall back to the
 426                  *      display engine requirement instead.  The HW requires
 427                  *      the pitch to be 64 byte aligned
 428                  */
 429
 430                 gtt_roll = 0;   /* Don't use GTT accelerated scrolling */
 431                 pitch_lines = 64;
 432
 433                 mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);
 434
 435                 size = mode_cmd.pitches[0] * mode_cmd.height;
 436                 size = ALIGN(size, PAGE_SIZE);
 437
 438                 /* Allocate the framebuffer in the GTT with stolen page backing */
 439                 backing = psbfb_alloc(dev, size);
 440                 if (backing == NULL)
 441                         return -ENOMEM;
 442         }
 443
 444         mutex_lock(&dev->struct_mutex);
 445
 446         info = framebuffer_alloc(0, device);
 447         if (!info) {
 448                 ret = -ENOMEM;
 449                 goto out_err1;
 450         }
 451         info->par = fbdev;
 452
 453         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 454
 455         ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);
 456         if (ret)
 457                 goto out_unref;
 458
 459         fb = &psbfb->base;
 460         psbfb->fbdev = info;
 461
 462         fbdev->psb_fb_helper.fb = fb;
 463         fbdev->psb_fb_helper.fbdev = info;
 464
 465         strcpy(info->fix.id, "psbfb");
 466
 467         info->flags = FBINFO_DEFAULT;
 468         if (dev_priv->ops->accel_2d && pitch_lines > 8) /* 2D engine */
 469                 info->fbops = &psbfb_ops;
 470         else if (gtt_roll) {    /* GTT rolling seems best */
 471                 info->fbops = &psbfb_roll_ops;
 472                 info->flags |= FBINFO_HWACCEL_YPAN;
 473         } else  /* Software */
 474                 info->fbops = &psbfb_unaccel_ops;
 475
 476         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 477         if (ret) {
 478                 ret = -ENOMEM;
 479                 goto out_unref;
 480         }
 481
 482         info->fix.smem_start = dev->mode_config.fb_base;
 483         info->fix.smem_len = size;
 484         info->fix.ywrapstep = gtt_roll;
 485         info->fix.ypanstep = 0;
 486
 487         /* Accessed stolen memory directly */
 488         info->screen_base = (char *)dev_priv->vram_addr +
 489                                                         backing->offset;
 490         info->screen_size = size;
 491
 492         if (dev_priv->gtt.stolen_size) {
 493                 info->apertures = alloc_apertures(1);
 494                 if (!info->apertures) {
 495                         ret = -ENOMEM;
 496                         goto out_unref;
 497                 }
 498                 info->apertures->ranges[0].base = dev->mode_config.fb_base;
 499                 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
 500         }
 501
 502         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 503         drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
 504                                 sizes->fb_width, sizes->fb_height);
 505
 506         info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
 507         info->fix.mmio_len = pci_resource_len(dev->pdev, 0);
 508
 509         info->pixmap.size = 64 * 1024;
 510         info->pixmap.buf_align = 8;
 511         info->pixmap.access_align = 32;
 512         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 513         info->pixmap.scan_align = 1;
 514
 515         dev_info(dev->dev, "allocated %dx%d fb\n",
 516                                         psbfb->base.width, psbfb->base.height);
 517
 518         mutex_unlock(&dev->struct_mutex);
 519         return 0;
 520 out_unref:
 521         if (backing->stolen)
 522                 psb_gtt_free_range(dev, backing);
 523         else
 524                 drm_gem_object_unreference(&backing->gem);
 525 out_err1:
 526         mutex_unlock(&dev->struct_mutex);
 527         psb_gtt_free_range(dev, backing);
 528         return ret;
 529 }
 530
 531 /**
 532  *      psb_user_framebuffer_create     -       create framebuffer
 533  *      @dev: our DRM device
 534  *      @filp: client file
 535  *      @cmd: mode request
 536  *
 537  *      Create a new framebuffer backed by a userspace GEM object
 538  */
 539 static struct drm_framebuffer *psb_user_framebuffer_create
 540                         (struct drm_device *dev, struct drm_file *filp,
 541                          struct drm_mode_fb_cmd2 *cmd)
 542 {
 543         struct gtt_range *r;
 544         struct drm_gem_object *obj;
 545
 546         /*
 547          *      Find the GEM object and thus the gtt range object that is
 548          *      to back this space
 549          */
 550         obj = drm_gem_object_lookup(dev, filp, cmd->handles[0]);
 551         if (obj == NULL)
 552                 return ERR_PTR(-ENOENT);
 553
 554         /* Let the core code do all the work */
 555         r = container_of(obj, struct gtt_range, gem);
 556         return psb_framebuffer_create(dev, cmd, r);
 557 }
 558
 559 static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 560                                                         u16 blue, int regno)
 561 {
 562 }
 563
 564 static void psbfb_gamma_get(struct drm_crtc *crtc, u16 *red,
 565                                         u16 *green, u16 *blue, int regno)
 566 {
 567 }
 568
 569 static int psbfb_probe(struct drm_fb_helper *helper,
 570                                 struct drm_fb_helper_surface_size *sizes)
 571 {
 572         struct psb_fbdev *psb_fbdev = (struct psb_fbdev *)helper;
 573         int new_fb = 0;
 574         int ret;
 575
 576         if (!helper->fb) {
 577                 ret = psbfb_create(psb_fbdev, sizes);
 578                 if (ret)
 579                         return ret;
 580                 new_fb = 1;
 581         }
 582         return new_fb;
 583 }
 584
 585 struct drm_fb_helper_funcs psb_fb_helper_funcs = {
 586         .gamma_set = psbfb_gamma_set,
 587         .gamma_get = psbfb_gamma_get,
 588         .fb_probe = psbfb_probe,
 589 };
 590
 591 int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
 592 {
 593         struct fb_info *info;
 594         struct psb_framebuffer *psbfb = &fbdev->pfb;
 595
 596         if (fbdev->psb_fb_helper.fbdev) {
 597                 info = fbdev->psb_fb_helper.fbdev;
 598                 unregister_framebuffer(info);
 599                 if (info->cmap.len)
 600                         fb_dealloc_cmap(&info->cmap);
 601                 framebuffer_release(info);
 602         }
 603         drm_fb_helper_fini(&fbdev->psb_fb_helper);
 604         drm_framebuffer_cleanup(&psbfb->base);
 605
 606         if (psbfb->gtt)
 607                 drm_gem_object_unreference(&psbfb->gtt->gem);
 608         return 0;
 609 }
 610
 611 int psb_fbdev_init(struct drm_device *dev)
 612 {
 613         struct psb_fbdev *fbdev;
 614         struct drm_psb_private *dev_priv = dev->dev_private;
 615
 616         fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL);
 617         if (!fbdev) {
 618                 dev_err(dev->dev, "no memory\n");
 619                 return -ENOMEM;
 620         }
 621
 622         dev_priv->fbdev = fbdev;
 623         fbdev->psb_fb_helper.funcs = &psb_fb_helper_funcs;
 624
 625         drm_fb_helper_init(dev, &fbdev->psb_fb_helper, dev_priv->ops->crtcs,
 626                                                         INTELFB_CONN_LIMIT);
 627
 628         drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper);
 629         drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32);
 630         return 0;
 631 }
 632
 633 void psb_fbdev_fini(struct drm_device *dev)
 634 {
 635         struct drm_psb_private *dev_priv = dev->dev_private;
 636
 637         if (!dev_priv->fbdev)
 638                 return;
 639
 640         psb_fbdev_destroy(dev, dev_priv->fbdev);
 641         kfree(dev_priv->fbdev);
 642         dev_priv->fbdev = NULL;
 643 }
 644
 645 static void psbfb_output_poll_changed(struct drm_device *dev)
 646 {
 647         struct drm_psb_private *dev_priv = dev->dev_private;
 648         struct psb_fbdev *fbdev = (struct psb_fbdev *)dev_priv->fbdev;
 649         drm_fb_helper_hotplug_event(&fbdev->psb_fb_helper);
 650 }
 651
 652 /**
 653  *      psb_user_framebuffer_create_handle - add hamdle to a framebuffer
 654  *      @fb: framebuffer
 655  *      @file_priv: our DRM file
 656  *      @handle: returned handle
 657  *
 658  *      Our framebuffer object is a GTT range which also contains a GEM
 659  *      object. We need to turn it into a handle for userspace. GEM will do
 660  *      the work for us
 661  */
 662 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
 663                                               struct drm_file *file_priv,
 664                                               unsigned int *handle)
 665 {
 666         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 667         struct gtt_range *r = psbfb->gtt;
 668         return drm_gem_handle_create(file_priv, &r->gem, handle);
 669 }
 670
 671 /**
 672  *      psb_user_framebuffer_destroy    -       destruct user created fb
 673  *      @fb: framebuffer
 674  *
 675  *      User framebuffers are backed by GEM objects so all we have to do is
 676  *      clean up a bit and drop the reference, GEM will handle the fallout
 677  */
 678 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)
 679 {
 680         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 681         struct gtt_range *r = psbfb->gtt;
 682         struct drm_device *dev = fb->dev;
 683         struct drm_psb_private *dev_priv = dev->dev_private;
 684         struct psb_fbdev *fbdev = dev_priv->fbdev;
 685         struct drm_crtc *crtc;
 686         int reset = 0;
 687
 688         /* Should never get stolen memory for a user fb */
 689         WARN_ON(r->stolen);
 690
 691         /* Check if we are erroneously live */
 692         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 693                 if (crtc->fb == fb)
 694                         reset = 1;
 695
 696         if (reset)
 697                 /*
 698                  * Now force a sane response before we permit the DRM CRTC
 699                  * layer to do stupid things like blank the display. Instead
 700                  * we reset this framebuffer as if the user had forced a reset.
 701                  * We must do this before the cleanup so that the DRM layer
 702                  * doesn't get a chance to stick its oar in where it isn't
 703                  * wanted.
 704                  */
 705                 drm_fb_helper_restore_fbdev_mode(&fbdev->psb_fb_helper);
 706
 707         /* Let DRM do its clean up */
 708         drm_framebuffer_cleanup(fb);
 709         /*  We are no longer using the resource in GEM */
 710         drm_gem_object_unreference_unlocked(&r->gem);
 711         kfree(fb);
 712 }
 713
 714 static const struct drm_mode_config_funcs psb_mode_funcs = {
 715         .fb_create = psb_user_framebuffer_create,
 716         .output_poll_changed = psbfb_output_poll_changed,
 717 };
 718
 719 static int psb_create_backlight_property(struct drm_device *dev)
 720 {
 721         struct drm_psb_private *dev_priv = dev->dev_private;
 722         struct drm_property *backlight;
 723
 724         if (dev_priv->backlight_property)
 725                 return 0;
 726
 727         backlight = drm_property_create(dev, DRM_MODE_PROP_RANGE,
 728                                                         "backlight", 2);
 729         backlight->values[0] = 0;
 730         backlight->values[1] = 100;
 731
 732         dev_priv->backlight_property = backlight;
 733
 734         return 0;
 735 }
 736
 737 static void psb_setup_outputs(struct drm_device *dev)
 738 {
 739         struct drm_psb_private *dev_priv = dev->dev_private;
 740         struct drm_connector *connector;
 741
 742         drm_mode_create_scaling_mode_property(dev);
 743         psb_create_backlight_property(dev);
 744
 745         dev_priv->ops->output_init(dev);
 746
 747         list_for_each_entry(connector, &dev->mode_config.connector_list,
 748                             head) {
 749                 struct psb_intel_encoder *psb_intel_encoder =
 750                         psb_intel_attached_encoder(connector);
 751                 struct drm_encoder *encoder = &psb_intel_encoder->base;
 752                 int crtc_mask = 0, clone_mask = 0;
 753
 754                 /* valid crtcs */
 755                 switch (psb_intel_encoder->type) {
 756                 case INTEL_OUTPUT_ANALOG:
 757                         crtc_mask = (1 << 0);
 758                         clone_mask = (1 << INTEL_OUTPUT_ANALOG);
 759                         break;
 760                 case INTEL_OUTPUT_SDVO:
 761                         crtc_mask = ((1 << 0) | (1 << 1));
 762                         clone_mask = (1 << INTEL_OUTPUT_SDVO);
 763                         break;
 764                 case INTEL_OUTPUT_LVDS:
 765                         if (IS_MRST(dev))
 766                                 crtc_mask = (1 << 0);
 767                         else
 768                                 crtc_mask = (1 << 1);
 769                         clone_mask = (1 << INTEL_OUTPUT_LVDS);
 770                         break;
 771                 case INTEL_OUTPUT_MIPI:
 772                         crtc_mask = (1 << 0);
 773                         clone_mask = (1 << INTEL_OUTPUT_MIPI);
 774                         break;
 775                 case INTEL_OUTPUT_MIPI2:
 776                         crtc_mask = (1 << 2);
 777                         clone_mask = (1 << INTEL_OUTPUT_MIPI2);
 778                         break;
 779                 case INTEL_OUTPUT_HDMI:
 780                         if (IS_MFLD(dev))
 781                                 crtc_mask = (1 << 1);
 782                         else
 783                                 crtc_mask = (1 << 0);
 784                         clone_mask = (1 << INTEL_OUTPUT_HDMI);
 785                         break;
 786                 }
 787                 encoder->possible_crtcs = crtc_mask;
 788                 encoder->possible_clones =
 789                     psb_intel_connector_clones(dev, clone_mask);
 790         }
 791 }
 792
 793 void psb_modeset_init(struct drm_device *dev)
 794 {
 795         struct drm_psb_private *dev_priv = dev->dev_private;
 796         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 797         int i;
 798
 799         drm_mode_config_init(dev);
 800
 801         dev->mode_config.min_width = 0;
 802         dev->mode_config.min_height = 0;
 803
 804         dev->mode_config.funcs = (void *) &psb_mode_funcs;
 805
 806         /* set memory base */
 807         /* Oaktrail and Poulsbo should use BAR 2*/
 808         pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
 809                                         &(dev->mode_config.fb_base));
 810
 811         /* num pipes is 2 for PSB but 1 for Mrst */
 812         for (i = 0; i < dev_priv->num_pipe; i++)
 813                 psb_intel_crtc_init(dev, i, mode_dev);
 814
 815         dev->mode_config.max_width = 2048;
 816         dev->mode_config.max_height = 2048;
 817
 818         psb_setup_outputs(dev);
 819 }
 820
 821 void psb_modeset_cleanup(struct drm_device *dev)
 822 {
 823         mutex_lock(&dev->struct_mutex);
 824
 825         drm_kms_helper_poll_fini(dev);
 826         psb_fbdev_fini(dev);
 827         drm_mode_config_cleanup(dev);
 828
 829         mutex_unlock(&dev->struct_mutex);
 830 }