kernel/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         unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
 125                                   psbfb->gtt->offset;
 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_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
 182         return 0;
 183 }
 184
 185 static int psbfb_ioctl(struct fb_info *info, unsigned int cmd,
 186                                                 unsigned long arg)
 187 {
 188         return -ENOTTY;
 189 }
 190
 191 static struct fb_ops psbfb_ops = {
 192         .owner = THIS_MODULE,
 193         .fb_check_var = drm_fb_helper_check_var,
 194         .fb_set_par = drm_fb_helper_set_par,
 195         .fb_blank = drm_fb_helper_blank,
 196         .fb_setcolreg = psbfb_setcolreg,
 197         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 198         .fb_copyarea = psbfb_copyarea,
 199         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 200         .fb_mmap = psbfb_mmap,
 201         .fb_sync = psbfb_sync,
 202         .fb_ioctl = psbfb_ioctl,
 203 };
 204
 205 static struct fb_ops psbfb_roll_ops = {
 206         .owner = THIS_MODULE,
 207         .fb_check_var = drm_fb_helper_check_var,
 208         .fb_set_par = drm_fb_helper_set_par,
 209         .fb_blank = drm_fb_helper_blank,
 210         .fb_setcolreg = psbfb_setcolreg,
 211         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 212         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 213         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 214         .fb_pan_display = psbfb_pan,
 215         .fb_mmap = psbfb_mmap,
 216         .fb_ioctl = psbfb_ioctl,
 217 };
 218
 219 static struct fb_ops psbfb_unaccel_ops = {
 220         .owner = THIS_MODULE,
 221         .fb_check_var = drm_fb_helper_check_var,
 222         .fb_set_par = drm_fb_helper_set_par,
 223         .fb_blank = drm_fb_helper_blank,
 224         .fb_setcolreg = psbfb_setcolreg,
 225         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 226         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 227         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 228         .fb_mmap = psbfb_mmap,
 229         .fb_ioctl = psbfb_ioctl,
 230 };
 231
 232 /**
 233  *      psb_framebuffer_init    -       initialize a framebuffer
 234  *      @dev: our DRM device
 235  *      @fb: framebuffer to set up
 236  *      @mode_cmd: mode description
 237  *      @gt: backing object
 238  *
 239  *      Configure and fill in the boilerplate for our frame buffer. Return
 240  *      0 on success or an error code if we fail.
 241  */
 242 static int psb_framebuffer_init(struct drm_device *dev,
 243                                         struct psb_framebuffer *fb,
 244                                         struct drm_mode_fb_cmd2 *mode_cmd,
 245                                         struct gtt_range *gt)
 246 {
 247         u32 bpp, depth;
 248         int ret;
 249
 250         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 251
 252         if (mode_cmd->pitches[0] & 63)
 253                 return -EINVAL;
 254         switch (bpp) {
 255         case 8:
 256         case 16:
 257         case 24:
 258         case 32:
 259                 break;
 260         default:
 261                 return -EINVAL;
 262         }
 263         drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
 264         fb->gtt = gt;
 265         ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);
 266         if (ret) {
 267                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 268                 return ret;
 269         }
 270         return 0;
 271 }
 272
 273 /**
 274  *      psb_framebuffer_create  -       create a framebuffer backed by gt
 275  *      @dev: our DRM device
 276  *      @mode_cmd: the description of the requested mode
 277  *      @gt: the backing object
 278  *
 279  *      Create a framebuffer object backed by the gt, and fill in the
 280  *      boilerplate required
 281  *
 282  *      TODO: review object references
 283  */
 284
 285 static struct drm_framebuffer *psb_framebuffer_create
 286                         (struct drm_device *dev,
 287                          struct drm_mode_fb_cmd2 *mode_cmd,
 288                          struct gtt_range *gt)
 289 {
 290         struct psb_framebuffer *fb;
 291         int ret;
 292
 293         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 294         if (!fb)
 295                 return ERR_PTR(-ENOMEM);
 296
 297         ret = psb_framebuffer_init(dev, fb, mode_cmd, gt);
 298         if (ret) {
 299                 kfree(fb);
 300                 return ERR_PTR(ret);
 301         }
 302         return &fb->base;
 303 }
 304
 305 /**
 306  *      psbfb_alloc             -       allocate frame buffer memory
 307  *      @dev: the DRM device
 308  *      @aligned_size: space needed
 309  *      @force: fall back to GEM buffers if need be
 310  *
 311  *      Allocate the frame buffer. In the usual case we get a GTT range that
 312  *      is stolen memory backed and life is simple. If there isn't sufficient
 313  *      we fail as we don't have the virtual mapping space to really vmap it
 314  *      and the kernel console code can't handle non linear framebuffers.
 315  *
 316  *      Re-address this as and if the framebuffer layer grows this ability.
 317  */
 318 static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
 319 {
 320         struct gtt_range *backing;
 321         /* Begin by trying to use stolen memory backing */
 322         backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1, PAGE_SIZE);
 323         if (backing) {
 324                 drm_gem_private_object_init(dev, &backing->gem, aligned_size);
 325                 return backing;
 326         }
 327         return NULL;
 328 }
 329
 330 /**
 331  *      psbfb_create            -       create a framebuffer
 332  *      @fbdev: the framebuffer device
 333  *      @sizes: specification of the layout
 334  *
 335  *      Create a framebuffer to the specifications provided
 336  */
 337 static int psbfb_create(struct psb_fbdev *fbdev,
 338                                 struct drm_fb_helper_surface_size *sizes)
 339 {
 340         struct drm_device *dev = fbdev->psb_fb_helper.dev;
 341         struct drm_psb_private *dev_priv = dev->dev_private;
 342         struct fb_info *info;
 343         struct drm_framebuffer *fb;
 344         struct psb_framebuffer *psbfb = &fbdev->pfb;
 345         struct drm_mode_fb_cmd2 mode_cmd;
 346         int size;
 347         int ret;
 348         struct gtt_range *backing;
 349         u32 bpp, depth;
 350         int gtt_roll = 0;
 351         int pitch_lines = 0;
 352
 353         mode_cmd.width = sizes->surface_width;
 354         mode_cmd.height = sizes->surface_height;
 355         bpp = sizes->surface_bpp;
 356         depth = sizes->surface_depth;
 357
 358         /* No 24bit packed */
 359         if (bpp == 24)
 360                 bpp = 32;
 361
 362         do {
 363                 /*
 364                  * Acceleration via the GTT requires pitch to be
 365                  * power of two aligned. Preferably page but less
 366                  * is ok with some fonts
 367                  */
 368                 mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines);
 369
 370                 size = mode_cmd.pitches[0] * mode_cmd.height;
 371                 size = ALIGN(size, PAGE_SIZE);
 372
 373                 /* Allocate the fb in the GTT with stolen page backing */
 374                 backing = psbfb_alloc(dev, size);
 375
 376                 if (pitch_lines)
 377                         pitch_lines *= 2;
 378                 else
 379                         pitch_lines = 1;
 380                 gtt_roll++;
 381         } while (backing == NULL && pitch_lines <= 16);
 382
 383         /* The final pitch we accepted if we succeeded */
 384         pitch_lines /= 2;
 385
 386         if (backing == NULL) {
 387                 /*
 388                  *      We couldn't get the space we wanted, fall back to the
 389                  *      display engine requirement instead.  The HW requires
 390                  *      the pitch to be 64 byte aligned
 391                  */
 392
 393                 gtt_roll = 0;   /* Don't use GTT accelerated scrolling */
 394                 pitch_lines = 64;
 395
 396                 mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);
 397
 398                 size = mode_cmd.pitches[0] * 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
 407         memset(dev_priv->vram_addr + backing->offset, 0, size);
 408
 409         mutex_lock(&dev->struct_mutex);
 410
 411         info = drm_fb_helper_alloc_fbi(&fbdev->psb_fb_helper);
 412         if (IS_ERR(info)) {
 413                 ret = PTR_ERR(info);
 414                 goto out_err1;
 415         }
 416         info->par = fbdev;
 417
 418         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 419
 420         ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);
 421         if (ret)
 422                 goto out_unref;
 423
 424         fb = &psbfb->base;
 425         psbfb->fbdev = info;
 426
 427         fbdev->psb_fb_helper.fb = fb;
 428
 429         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 430         strcpy(info->fix.id, "psbdrmfb");
 431
 432         info->flags = FBINFO_DEFAULT;
 433         if (dev_priv->ops->accel_2d && pitch_lines > 8) /* 2D engine */
 434                 info->fbops = &psbfb_ops;
 435         else if (gtt_roll) {    /* GTT rolling seems best */
 436                 info->fbops = &psbfb_roll_ops;
 437                 info->flags |= FBINFO_HWACCEL_YPAN;
 438         } else  /* Software */
 439                 info->fbops = &psbfb_unaccel_ops;
 440
 441         info->fix.smem_start = dev->mode_config.fb_base;
 442         info->fix.smem_len = size;
 443         info->fix.ywrapstep = gtt_roll;
 444         info->fix.ypanstep = 0;
 445
 446         /* Accessed stolen memory directly */
 447         info->screen_base = dev_priv->vram_addr + backing->offset;
 448         info->screen_size = size;
 449
 450         if (dev_priv->gtt.stolen_size) {
 451                 info->apertures->ranges[0].base = dev->mode_config.fb_base;
 452                 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
 453         }
 454
 455         drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
 456                                 sizes->fb_width, sizes->fb_height);
 457
 458         info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
 459         info->fix.mmio_len = pci_resource_len(dev->pdev, 0);
 460
 461         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 462
 463         dev_dbg(dev->dev, "allocated %dx%d fb\n",
 464                                         psbfb->base.width, psbfb->base.height);
 465
 466         mutex_unlock(&dev->struct_mutex);
 467         return 0;
 468 out_unref:
 469         if (backing->stolen)
 470                 psb_gtt_free_range(dev, backing);
 471         else
 472                 drm_gem_object_unreference(&backing->gem);
 473
 474         drm_fb_helper_release_fbi(&fbdev->psb_fb_helper);
 475 out_err1:
 476         mutex_unlock(&dev->struct_mutex);
 477         psb_gtt_free_range(dev, backing);
 478         return ret;
 479 }
 480
 481 /**
 482  *      psb_user_framebuffer_create     -       create framebuffer
 483  *      @dev: our DRM device
 484  *      @filp: client file
 485  *      @cmd: mode request
 486  *
 487  *      Create a new framebuffer backed by a userspace GEM object
 488  */
 489 static struct drm_framebuffer *psb_user_framebuffer_create
 490                         (struct drm_device *dev, struct drm_file *filp,
 491                          struct drm_mode_fb_cmd2 *cmd)
 492 {
 493         struct gtt_range *r;
 494         struct drm_gem_object *obj;
 495
 496         /*
 497          *      Find the GEM object and thus the gtt range object that is
 498          *      to back this space
 499          */
 500         obj = drm_gem_object_lookup(dev, filp, cmd->handles[0]);
 501         if (obj == NULL)
 502                 return ERR_PTR(-ENOENT);
 503
 504         /* Let the core code do all the work */
 505         r = container_of(obj, struct gtt_range, gem);
 506         return psb_framebuffer_create(dev, cmd, r);
 507 }
 508
 509 static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 510                                                         u16 blue, int regno)
 511 {
 512         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 513
 514         gma_crtc->lut_r[regno] = red >> 8;
 515         gma_crtc->lut_g[regno] = green >> 8;
 516         gma_crtc->lut_b[regno] = blue >> 8;
 517 }
 518
 519 static void psbfb_gamma_get(struct drm_crtc *crtc, u16 *red,
 520                                         u16 *green, u16 *blue, int regno)
 521 {
 522         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 523
 524         *red = gma_crtc->lut_r[regno] << 8;
 525         *green = gma_crtc->lut_g[regno] << 8;
 526         *blue = gma_crtc->lut_b[regno] << 8;
 527 }
 528
 529 static int psbfb_probe(struct drm_fb_helper *helper,
 530                                 struct drm_fb_helper_surface_size *sizes)
 531 {
 532         struct psb_fbdev *psb_fbdev =
 533                 container_of(helper, struct psb_fbdev, psb_fb_helper);
 534         struct drm_device *dev = psb_fbdev->psb_fb_helper.dev;
 535         struct drm_psb_private *dev_priv = dev->dev_private;
 536         int bytespp;
 537
 538         bytespp = sizes->surface_bpp / 8;
 539         if (bytespp == 3)       /* no 24bit packed */
 540                 bytespp = 4;
 541
 542         /* If the mode will not fit in 32bit then switch to 16bit to get
 543            a console on full resolution. The X mode setting server will
 544            allocate its own 32bit GEM framebuffer */
 545         if (ALIGN(sizes->fb_width * bytespp, 64) * sizes->fb_height >
 546                         dev_priv->vram_stolen_size) {
 547                 sizes->surface_bpp = 16;
 548                 sizes->surface_depth = 16;
 549         }
 550
 551         return psbfb_create(psb_fbdev, sizes);
 552 }
 553
 554 static const struct drm_fb_helper_funcs psb_fb_helper_funcs = {
 555         .gamma_set = psbfb_gamma_set,
 556         .gamma_get = psbfb_gamma_get,
 557         .fb_probe = psbfb_probe,
 558 };
 559
 560 static int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
 561 {
 562         struct psb_framebuffer *psbfb = &fbdev->pfb;
 563
 564         drm_fb_helper_unregister_fbi(&fbdev->psb_fb_helper);
 565         drm_fb_helper_release_fbi(&fbdev->psb_fb_helper);
 566
 567         drm_fb_helper_fini(&fbdev->psb_fb_helper);
 568         drm_framebuffer_unregister_private(&psbfb->base);
 569         drm_framebuffer_cleanup(&psbfb->base);
 570
 571         if (psbfb->gtt)
 572                 drm_gem_object_unreference(&psbfb->gtt->gem);
 573         return 0;
 574 }
 575
 576 int psb_fbdev_init(struct drm_device *dev)
 577 {
 578         struct psb_fbdev *fbdev;
 579         struct drm_psb_private *dev_priv = dev->dev_private;
 580         int ret;
 581
 582         fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL);
 583         if (!fbdev) {
 584                 dev_err(dev->dev, "no memory\n");
 585                 return -ENOMEM;
 586         }
 587
 588         dev_priv->fbdev = fbdev;
 589
 590         drm_fb_helper_prepare(dev, &fbdev->psb_fb_helper, &psb_fb_helper_funcs);
 591
 592         ret = drm_fb_helper_init(dev, &fbdev->psb_fb_helper,
 593                                  dev_priv->ops->crtcs, INTELFB_CONN_LIMIT);
 594         if (ret)
 595                 goto free;
 596
 597         ret = drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper);
 598         if (ret)
 599                 goto fini;
 600
 601         /* disable all the possible outputs/crtcs before entering KMS mode */
 602         drm_helper_disable_unused_functions(dev);
 603
 604         ret = drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32);
 605         if (ret)
 606                 goto fini;
 607
 608         return 0;
 609
 610 fini:
 611         drm_fb_helper_fini(&fbdev->psb_fb_helper);
 612 free:
 613         kfree(fbdev);
 614         return ret;
 615 }
 616
 617 static void psb_fbdev_fini(struct drm_device *dev)
 618 {
 619         struct drm_psb_private *dev_priv = dev->dev_private;
 620
 621         if (!dev_priv->fbdev)
 622                 return;
 623
 624         psb_fbdev_destroy(dev, dev_priv->fbdev);
 625         kfree(dev_priv->fbdev);
 626         dev_priv->fbdev = NULL;
 627 }
 628
 629 static void psbfb_output_poll_changed(struct drm_device *dev)
 630 {
 631         struct drm_psb_private *dev_priv = dev->dev_private;
 632         struct psb_fbdev *fbdev = (struct psb_fbdev *)dev_priv->fbdev;
 633         drm_fb_helper_hotplug_event(&fbdev->psb_fb_helper);
 634 }
 635
 636 /**
 637  *      psb_user_framebuffer_create_handle - add hamdle to a framebuffer
 638  *      @fb: framebuffer
 639  *      @file_priv: our DRM file
 640  *      @handle: returned handle
 641  *
 642  *      Our framebuffer object is a GTT range which also contains a GEM
 643  *      object. We need to turn it into a handle for userspace. GEM will do
 644  *      the work for us
 645  */
 646 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
 647                                               struct drm_file *file_priv,
 648                                               unsigned int *handle)
 649 {
 650         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 651         struct gtt_range *r = psbfb->gtt;
 652         return drm_gem_handle_create(file_priv, &r->gem, handle);
 653 }
 654
 655 /**
 656  *      psb_user_framebuffer_destroy    -       destruct user created fb
 657  *      @fb: framebuffer
 658  *
 659  *      User framebuffers are backed by GEM objects so all we have to do is
 660  *      clean up a bit and drop the reference, GEM will handle the fallout
 661  */
 662 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb)
 663 {
 664         struct psb_framebuffer *psbfb = to_psb_fb(fb);
 665         struct gtt_range *r = psbfb->gtt;
 666
 667         /* Let DRM do its clean up */
 668         drm_framebuffer_cleanup(fb);
 669         /*  We are no longer using the resource in GEM */
 670         drm_gem_object_unreference_unlocked(&r->gem);
 671         kfree(fb);
 672 }
 673
 674 static const struct drm_mode_config_funcs psb_mode_funcs = {
 675         .fb_create = psb_user_framebuffer_create,
 676         .output_poll_changed = psbfb_output_poll_changed,
 677 };
 678
 679 static int psb_create_backlight_property(struct drm_device *dev)
 680 {
 681         struct drm_psb_private *dev_priv = dev->dev_private;
 682         struct drm_property *backlight;
 683
 684         if (dev_priv->backlight_property)
 685                 return 0;
 686
 687         backlight = drm_property_create_range(dev, 0, "backlight", 0, 100);
 688
 689         dev_priv->backlight_property = backlight;
 690
 691         return 0;
 692 }
 693
 694 static void psb_setup_outputs(struct drm_device *dev)
 695 {
 696         struct drm_psb_private *dev_priv = dev->dev_private;
 697         struct drm_connector *connector;
 698
 699         drm_mode_create_scaling_mode_property(dev);
 700         psb_create_backlight_property(dev);
 701
 702         dev_priv->ops->output_init(dev);
 703
 704         list_for_each_entry(connector, &dev->mode_config.connector_list,
 705                             head) {
 706                 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 707                 struct drm_encoder *encoder = &gma_encoder->base;
 708                 int crtc_mask = 0, clone_mask = 0;
 709
 710                 /* valid crtcs */
 711                 switch (gma_encoder->type) {
 712                 case INTEL_OUTPUT_ANALOG:
 713                         crtc_mask = (1 << 0);
 714                         clone_mask = (1 << INTEL_OUTPUT_ANALOG);
 715                         break;
 716                 case INTEL_OUTPUT_SDVO:
 717                         crtc_mask = dev_priv->ops->sdvo_mask;
 718                         clone_mask = (1 << INTEL_OUTPUT_SDVO);
 719                         break;
 720                 case INTEL_OUTPUT_LVDS:
 721                         crtc_mask = dev_priv->ops->lvds_mask;
 722                         clone_mask = (1 << INTEL_OUTPUT_LVDS);
 723                         break;
 724                 case INTEL_OUTPUT_MIPI:
 725                         crtc_mask = (1 << 0);
 726                         clone_mask = (1 << INTEL_OUTPUT_MIPI);
 727                         break;
 728                 case INTEL_OUTPUT_MIPI2:
 729                         crtc_mask = (1 << 2);
 730                         clone_mask = (1 << INTEL_OUTPUT_MIPI2);
 731                         break;
 732                 case INTEL_OUTPUT_HDMI:
 733                         crtc_mask = dev_priv->ops->hdmi_mask;
 734                         clone_mask = (1 << INTEL_OUTPUT_HDMI);
 735                         break;
 736                 case INTEL_OUTPUT_DISPLAYPORT:
 737                         crtc_mask = (1 << 0) | (1 << 1);
 738                         clone_mask = (1 << INTEL_OUTPUT_DISPLAYPORT);
 739                         break;
 740                 case INTEL_OUTPUT_EDP:
 741                         crtc_mask = (1 << 1);
 742                         clone_mask = (1 << INTEL_OUTPUT_EDP);
 743                 }
 744                 encoder->possible_crtcs = crtc_mask;
 745                 encoder->possible_clones =
 746                     gma_connector_clones(dev, clone_mask);
 747         }
 748 }
 749
 750 void psb_modeset_init(struct drm_device *dev)
 751 {
 752         struct drm_psb_private *dev_priv = dev->dev_private;
 753         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 754         int i;
 755
 756         drm_mode_config_init(dev);
 757
 758         dev->mode_config.min_width = 0;
 759         dev->mode_config.min_height = 0;
 760
 761         dev->mode_config.funcs = &psb_mode_funcs;
 762
 763         /* set memory base */
 764         /* Oaktrail and Poulsbo should use BAR 2*/
 765         pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
 766                                         &(dev->mode_config.fb_base));
 767
 768         /* num pipes is 2 for PSB but 1 for Mrst */
 769         for (i = 0; i < dev_priv->num_pipe; i++)
 770                 psb_intel_crtc_init(dev, i, mode_dev);
 771
 772         dev->mode_config.max_width = 4096;
 773         dev->mode_config.max_height = 4096;
 774
 775         psb_setup_outputs(dev);
 776
 777         if (dev_priv->ops->errata)
 778                 dev_priv->ops->errata(dev);
 779
 780         dev_priv->modeset = true;
 781 }
 782
 783 void psb_modeset_cleanup(struct drm_device *dev)
 784 {
 785         struct drm_psb_private *dev_priv = dev->dev_private;
 786         if (dev_priv->modeset) {
 787                 mutex_lock(&dev->struct_mutex);
 788
 789                 drm_kms_helper_poll_fini(dev);
 790                 psb_fbdev_fini(dev);
 791                 drm_mode_config_cleanup(dev);
 792
 793                 mutex_unlock(&dev->struct_mutex);
 794         }
 795 }