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 = cfb_fillrect,
 198         .fb_copyarea = psbfb_copyarea,
 199         .fb_imageblit = 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 = cfb_fillrect,
 212         .fb_copyarea = cfb_copyarea,
 213         .fb_imageblit = 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 = cfb_fillrect,
 226         .fb_copyarea = cfb_copyarea,
 227         .fb_imageblit = 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         struct device *device = &dev->pdev->dev;
 347         int size;
 348         int ret;
 349         struct gtt_range *backing;
 350         u32 bpp, depth;
 351         int gtt_roll = 0;
 352         int pitch_lines = 0;
 353
 354         mode_cmd.width = sizes->surface_width;
 355         mode_cmd.height = sizes->surface_height;
 356         bpp = sizes->surface_bpp;
 357         depth = sizes->surface_depth;
 358
 359         /* No 24bit packed */
 360         if (bpp == 24)
 361                 bpp = 32;
 362
 363         do {
 364                 /*
 365                  * Acceleration via the GTT requires pitch to be
 366                  * power of two aligned. Preferably page but less
 367                  * is ok with some fonts
 368                  */
 369                 mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines);
 370
 371                 size = mode_cmd.pitches[0] * mode_cmd.height;
 372                 size = ALIGN(size, PAGE_SIZE);
 373
 374                 /* Allocate the fb in the GTT with stolen page backing */
 375                 backing = psbfb_alloc(dev, size);
 376
 377                 if (pitch_lines)
 378                         pitch_lines *= 2;
 379                 else
 380                         pitch_lines = 1;
 381                 gtt_roll++;
 382         } while (backing == NULL && pitch_lines <= 16);
 383
 384         /* The final pitch we accepted if we succeeded */
 385         pitch_lines /= 2;
 386
 387         if (backing == NULL) {
 388                 /*
 389                  *      We couldn't get the space we wanted, fall back to the
 390                  *      display engine requirement instead.  The HW requires
 391                  *      the pitch to be 64 byte aligned
 392                  */
 393
 394                 gtt_roll = 0;   /* Don't use GTT accelerated scrolling */
 395                 pitch_lines = 64;
 396
 397                 mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);
 398
 399                 size = mode_cmd.pitches[0] * mode_cmd.height;
 400                 size = ALIGN(size, PAGE_SIZE);
 401
 402                 /* Allocate the framebuffer in the GTT with stolen page backing */
 403                 backing = psbfb_alloc(dev, size);
 404                 if (backing == NULL)
 405                         return -ENOMEM;
 406         }
 407
 408         memset(dev_priv->vram_addr + backing->offset, 0, size);
 409
 410         mutex_lock(&dev->struct_mutex);
 411
 412         info = framebuffer_alloc(0, device);
 413         if (!info) {
 414                 ret = -ENOMEM;
 415                 goto out_err1;
 416         }
 417         info->par = fbdev;
 418
 419         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
 420
 421         ret = psb_framebuffer_init(dev, psbfb, &mode_cmd, backing);
 422         if (ret)
 423                 goto out_unref;
 424
 425         fb = &psbfb->base;
 426         psbfb->fbdev = info;
 427
 428         fbdev->psb_fb_helper.fb = fb;
 429         fbdev->psb_fb_helper.fbdev = info;
 430
 431         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 432         strcpy(info->fix.id, "psbdrmfb");
 433
 434         info->flags = FBINFO_DEFAULT;
 435         if (dev_priv->ops->accel_2d && pitch_lines > 8) /* 2D engine */
 436                 info->fbops = &psbfb_ops;
 437         else if (gtt_roll) {    /* GTT rolling seems best */
 438                 info->fbops = &psbfb_roll_ops;
 439                 info->flags |= FBINFO_HWACCEL_YPAN;
 440         } else  /* Software */
 441                 info->fbops = &psbfb_unaccel_ops;
 442
 443         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 444         if (ret) {
 445                 ret = -ENOMEM;
 446                 goto out_unref;
 447         }
 448
 449         info->fix.smem_start = dev->mode_config.fb_base;
 450         info->fix.smem_len = size;
 451         info->fix.ywrapstep = gtt_roll;
 452         info->fix.ypanstep = 0;
 453
 454         /* Accessed stolen memory directly */
 455         info->screen_base = dev_priv->vram_addr + backing->offset;
 456         info->screen_size = size;
 457
 458         if (dev_priv->gtt.stolen_size) {
 459                 info->apertures = alloc_apertures(1);
 460                 if (!info->apertures) {
 461                         ret = -ENOMEM;
 462                         goto out_unref;
 463                 }
 464                 info->apertures->ranges[0].base = dev->mode_config.fb_base;
 465                 info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
 466         }
 467
 468         drm_fb_helper_fill_var(info, &fbdev->psb_fb_helper,
 469                                 sizes->fb_width, sizes->fb_height);
 470
 471         info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
 472         info->fix.mmio_len = pci_resource_len(dev->pdev, 0);
 473
 474         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 475
 476         dev_dbg(dev->dev, "allocated %dx%d fb\n",
 477                                         psbfb->base.width, psbfb->base.height);
 478
 479         mutex_unlock(&dev->struct_mutex);
 480         return 0;
 481 out_unref:
 482         if (backing->stolen)
 483                 psb_gtt_free_range(dev, backing);
 484         else
 485                 drm_gem_object_unreference(&backing->gem);
 486 out_err1:
 487         mutex_unlock(&dev->struct_mutex);
 488         psb_gtt_free_range(dev, backing);
 489         return ret;
 490 }
 491
 492 /**
 493  *      psb_user_framebuffer_create     -       create framebuffer
 494  *      @dev: our DRM device
 495  *      @filp: client file
 496  *      @cmd: mode request
 497  *
 498  *      Create a new framebuffer backed by a userspace GEM object
 499  */
 500 static struct drm_framebuffer *psb_user_framebuffer_create
 501                         (struct drm_device *dev, struct drm_file *filp,
 502                          struct drm_mode_fb_cmd2 *cmd)
 503 {
 504         struct gtt_range *r;
 505         struct drm_gem_object *obj;
 506
 507         /*
 508          *      Find the GEM object and thus the gtt range object that is
 509          *      to back this space
 510          */
 511         obj = drm_gem_object_lookup(dev, filp, cmd->handles[0]);
 512         if (obj == NULL)
 513                 return ERR_PTR(-ENOENT);
 514
 515         /* Let the core code do all the work */
 516         r = container_of(obj, struct gtt_range, gem);
 517         return psb_framebuffer_create(dev, cmd, r);
 518 }
 519
 520 static void psbfb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 521                                                         u16 blue, int regno)
 522 {
 523         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 524
 525         gma_crtc->lut_r[regno] = red >> 8;
 526         gma_crtc->lut_g[regno] = green >> 8;
 527         gma_crtc->lut_b[regno] = blue >> 8;
 528 }
 529
 530 static void psbfb_gamma_get(struct drm_crtc *crtc, u16 *red,
 531                                         u16 *green, u16 *blue, int regno)
 532 {
 533         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 534
 535         *red = gma_crtc->lut_r[regno] << 8;
 536         *green = gma_crtc->lut_g[regno] << 8;
 537         *blue = gma_crtc->lut_b[regno] << 8;
 538 }
 539
 540 static int psbfb_probe(struct drm_fb_helper *helper,
 541                                 struct drm_fb_helper_surface_size *sizes)
 542 {
 543         struct psb_fbdev *psb_fbdev =
 544                 container_of(helper, struct psb_fbdev, psb_fb_helper);
 545         struct drm_device *dev = psb_fbdev->psb_fb_helper.dev;
 546         struct drm_psb_private *dev_priv = dev->dev_private;
 547         int bytespp;
 548
 549         bytespp = sizes->surface_bpp / 8;
 550         if (bytespp == 3)       /* no 24bit packed */
 551                 bytespp = 4;
 552
 553         /* If the mode will not fit in 32bit then switch to 16bit to get
 554            a console on full resolution. The X mode setting server will
 555            allocate its own 32bit GEM framebuffer */
 556         if (ALIGN(sizes->fb_width * bytespp, 64) * sizes->fb_height >
 557                         dev_priv->vram_stolen_size) {
 558                 sizes->surface_bpp = 16;
 559                 sizes->surface_depth = 16;
 560         }
 561
 562         return psbfb_create(psb_fbdev, sizes);
 563 }
 564
 565 static const struct drm_fb_helper_funcs psb_fb_helper_funcs = {
 566         .gamma_set = psbfb_gamma_set,
 567         .gamma_get = psbfb_gamma_get,
 568         .fb_probe = psbfb_probe,
 569 };
 570
 571 static int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
 572 {
 573         struct fb_info *info;
 574         struct psb_framebuffer *psbfb = &fbdev->pfb;
 575
 576         if (fbdev->psb_fb_helper.fbdev) {
 577                 info = fbdev->psb_fb_helper.fbdev;
 578                 unregister_framebuffer(info);
 579                 if (info->cmap.len)
 580                         fb_dealloc_cmap(&info->cmap);
 581                 framebuffer_release(info);
 582         }
 583         drm_fb_helper_fini(&fbdev->psb_fb_helper);
 584         drm_framebuffer_unregister_private(&psbfb->base);
 585         drm_framebuffer_cleanup(&psbfb->base);
 586
 587         if (psbfb->gtt)
 588                 drm_gem_object_unreference(&psbfb->gtt->gem);
 589         return 0;
 590 }
 591
 592 int psb_fbdev_init(struct drm_device *dev)
 593 {
 594         struct psb_fbdev *fbdev;
 595         struct drm_psb_private *dev_priv = dev->dev_private;
 596         int ret;
 597
 598         fbdev = kzalloc(sizeof(struct psb_fbdev), GFP_KERNEL);
 599         if (!fbdev) {
 600                 dev_err(dev->dev, "no memory\n");
 601                 return -ENOMEM;
 602         }
 603
 604         dev_priv->fbdev = fbdev;
 605
 606         drm_fb_helper_prepare(dev, &fbdev->psb_fb_helper, &psb_fb_helper_funcs);
 607
 608         ret = drm_fb_helper_init(dev, &fbdev->psb_fb_helper,
 609                                  dev_priv->ops->crtcs, INTELFB_CONN_LIMIT);
 610         if (ret)
 611                 goto free;
 612
 613         ret = drm_fb_helper_single_add_all_connectors(&fbdev->psb_fb_helper);
 614         if (ret)
 615                 goto fini;
 616
 617         /* disable all the possible outputs/crtcs before entering KMS mode */
 618         drm_helper_disable_unused_functions(dev);
 619
 620         ret = drm_fb_helper_initial_config(&fbdev->psb_fb_helper, 32);
 621         if (ret)
 622                 goto fini;
 623
 624         return 0;
 625
 626 fini:
 627         drm_fb_helper_fini(&fbdev->psb_fb_helper);
 628 free:
 629         kfree(fbdev);
 630         return ret;
 631 }
 632
 633 static 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
 683         /* Let DRM do its clean up */
 684         drm_framebuffer_cleanup(fb);
 685         /*  We are no longer using the resource in GEM */
 686         drm_gem_object_unreference_unlocked(&r->gem);
 687         kfree(fb);
 688 }
 689
 690 static const struct drm_mode_config_funcs psb_mode_funcs = {
 691         .fb_create = psb_user_framebuffer_create,
 692         .output_poll_changed = psbfb_output_poll_changed,
 693 };
 694
 695 static int psb_create_backlight_property(struct drm_device *dev)
 696 {
 697         struct drm_psb_private *dev_priv = dev->dev_private;
 698         struct drm_property *backlight;
 699
 700         if (dev_priv->backlight_property)
 701                 return 0;
 702
 703         backlight = drm_property_create_range(dev, 0, "backlight", 0, 100);
 704
 705         dev_priv->backlight_property = backlight;
 706
 707         return 0;
 708 }
 709
 710 static void psb_setup_outputs(struct drm_device *dev)
 711 {
 712         struct drm_psb_private *dev_priv = dev->dev_private;
 713         struct drm_connector *connector;
 714
 715         drm_mode_create_scaling_mode_property(dev);
 716         psb_create_backlight_property(dev);
 717
 718         dev_priv->ops->output_init(dev);
 719
 720         list_for_each_entry(connector, &dev->mode_config.connector_list,
 721                             head) {
 722                 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 723                 struct drm_encoder *encoder = &gma_encoder->base;
 724                 int crtc_mask = 0, clone_mask = 0;
 725
 726                 /* valid crtcs */
 727                 switch (gma_encoder->type) {
 728                 case INTEL_OUTPUT_ANALOG:
 729                         crtc_mask = (1 << 0);
 730                         clone_mask = (1 << INTEL_OUTPUT_ANALOG);
 731                         break;
 732                 case INTEL_OUTPUT_SDVO:
 733                         crtc_mask = dev_priv->ops->sdvo_mask;
 734                         clone_mask = (1 << INTEL_OUTPUT_SDVO);
 735                         break;
 736                 case INTEL_OUTPUT_LVDS:
 737                         crtc_mask = dev_priv->ops->lvds_mask;
 738                         clone_mask = (1 << INTEL_OUTPUT_LVDS);
 739                         break;
 740                 case INTEL_OUTPUT_MIPI:
 741                         crtc_mask = (1 << 0);
 742                         clone_mask = (1 << INTEL_OUTPUT_MIPI);
 743                         break;
 744                 case INTEL_OUTPUT_MIPI2:
 745                         crtc_mask = (1 << 2);
 746                         clone_mask = (1 << INTEL_OUTPUT_MIPI2);
 747                         break;
 748                 case INTEL_OUTPUT_HDMI:
 749                         crtc_mask = dev_priv->ops->hdmi_mask;
 750                         clone_mask = (1 << INTEL_OUTPUT_HDMI);
 751                         break;
 752                 case INTEL_OUTPUT_DISPLAYPORT:
 753                         crtc_mask = (1 << 0) | (1 << 1);
 754                         clone_mask = (1 << INTEL_OUTPUT_DISPLAYPORT);
 755                         break;
 756                 case INTEL_OUTPUT_EDP:
 757                         crtc_mask = (1 << 1);
 758                         clone_mask = (1 << INTEL_OUTPUT_EDP);
 759                 }
 760                 encoder->possible_crtcs = crtc_mask;
 761                 encoder->possible_clones =
 762                     gma_connector_clones(dev, clone_mask);
 763         }
 764 }
 765
 766 void psb_modeset_init(struct drm_device *dev)
 767 {
 768         struct drm_psb_private *dev_priv = dev->dev_private;
 769         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 770         int i;
 771
 772         drm_mode_config_init(dev);
 773
 774         dev->mode_config.min_width = 0;
 775         dev->mode_config.min_height = 0;
 776
 777         dev->mode_config.funcs = &psb_mode_funcs;
 778
 779         /* set memory base */
 780         /* Oaktrail and Poulsbo should use BAR 2*/
 781         pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
 782                                         &(dev->mode_config.fb_base));
 783
 784         /* num pipes is 2 for PSB but 1 for Mrst */
 785         for (i = 0; i < dev_priv->num_pipe; i++)
 786                 psb_intel_crtc_init(dev, i, mode_dev);
 787
 788         dev->mode_config.max_width = 4096;
 789         dev->mode_config.max_height = 4096;
 790
 791         psb_setup_outputs(dev);
 792
 793         if (dev_priv->ops->errata)
 794                 dev_priv->ops->errata(dev);
 795
 796         dev_priv->modeset = true;
 797 }
 798
 799 void psb_modeset_cleanup(struct drm_device *dev)
 800 {
 801         struct drm_psb_private *dev_priv = dev->dev_private;
 802         if (dev_priv->modeset) {
 803                 mutex_lock(&dev->struct_mutex);
 804
 805                 drm_kms_helper_poll_fini(dev);
 806                 psb_fbdev_fini(dev);
 807                 drm_mode_config_cleanup(dev);
 808
 809                 mutex_unlock(&dev->struct_mutex);
 810         }
 811 }