drivers/gpu/drm/i915/intel_fb.c

   1 /*
   2  * Copyright © 2007 David Airlie
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *     David Airlie
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/errno.h>
  30 #include <linux/string.h>
  31 #include <linux/mm.h>
  32 #include <linux/tty.h>
  33 #include <linux/slab.h>
  34 #include <linux/sysrq.h>
  35 #include <linux/delay.h>
  36 #include <linux/fb.h>
  37 #include <linux/init.h>
  38
  39 #include "drmP.h"
  40 #include "drm.h"
  41 #include "drm_crtc.h"
  42 #include "intel_drv.h"
  43 #include "i915_drm.h"
  44 #include "i915_drv.h"
  45
  46 struct intelfb_par {
  47         struct drm_device *dev;
  48         struct drm_display_mode *our_mode;
  49         struct intel_framebuffer *intel_fb;
  50         int crtc_count;
  51         /* crtc currently bound to this */
  52         uint32_t crtc_ids[2];
  53 };
  54
  55 static int intelfb_setcolreg(unsigned regno, unsigned red, unsigned green,
  56                         unsigned blue, unsigned transp,
  57                         struct fb_info *info)
  58 {
  59         struct intelfb_par *par = info->par;
  60         struct drm_device *dev = par->dev;
  61         struct drm_crtc *crtc;
  62         int i;
  63
  64         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
  65                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
  66                 struct drm_mode_set *modeset = &intel_crtc->mode_set;
  67                 struct drm_framebuffer *fb = modeset->fb;
  68
  69                 for (i = 0; i < par->crtc_count; i++)
  70                         if (crtc->base.id == par->crtc_ids[i])
  71                                 break;
  72
  73                 if (i == par->crtc_count)
  74                         continue;
  75
  76
  77                 if (regno > 255)
  78                         return 1;
  79
  80                 if (fb->depth == 8) {
  81                         intel_crtc_fb_gamma_set(crtc, red, green, blue, regno);
  82                         return 0;
  83                 }
  84
  85                 if (regno < 16) {
  86                         switch (fb->depth) {
  87                         case 15:
  88                                 fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
  89                                         ((green & 0xf800) >>  6) |
  90                                         ((blue & 0xf800) >> 11);
  91                                 break;
  92                         case 16:
  93                                 fb->pseudo_palette[regno] = (red & 0xf800) |
  94                                         ((green & 0xfc00) >>  5) |
  95                                         ((blue  & 0xf800) >> 11);
  96                                 break;
  97                         case 24:
  98                         case 32:
  99                                 fb->pseudo_palette[regno] = ((red & 0xff00) << 8) |
 100                                         (green & 0xff00) |
 101                                         ((blue  & 0xff00) >> 8);
 102                                 break;
 103                         }
 104                 }
 105         }
 106         return 0;
 107 }
 108
 109 static int intelfb_check_var(struct fb_var_screeninfo *var,
 110                         struct fb_info *info)
 111 {
 112         struct intelfb_par *par = info->par;
 113         struct intel_framebuffer *intel_fb = par->intel_fb;
 114         struct drm_framebuffer *fb = &intel_fb->base;
 115         int depth;
 116
 117         if (var->pixclock == -1 || !var->pixclock)
 118                 return -EINVAL;
 119
 120         /* Need to resize the fb object !!! */
 121         if (var->xres > fb->width || var->yres > fb->height) {
 122                 DRM_ERROR("Requested width/height is greater than current fb object %dx%d > %dx%d\n",var->xres,var->yres,fb->width,fb->height);
 123                 DRM_ERROR("Need resizing code.\n");
 124                 return -EINVAL;
 125         }
 126
 127         switch (var->bits_per_pixel) {
 128         case 16:
 129                 depth = (var->green.length == 6) ? 16 : 15;
 130                 break;
 131         case 32:
 132                 depth = (var->transp.length > 0) ? 32 : 24;
 133                 break;
 134         default:
 135                 depth = var->bits_per_pixel;
 136                 break;
 137         }
 138
 139         switch (depth) {
 140         case 8:
 141                 var->red.offset = 0;
 142                 var->green.offset = 0;
 143                 var->blue.offset = 0;
 144                 var->red.length = 8;
 145                 var->green.length = 8;
 146                 var->blue.length = 8;
 147                 var->transp.length = 0;
 148                 var->transp.offset = 0;
 149                 break;
 150         case 15:
 151                 var->red.offset = 10;
 152                 var->green.offset = 5;
 153                 var->blue.offset = 0;
 154                 var->red.length = 5;
 155                 var->green.length = 5;
 156                 var->blue.length = 5;
 157                 var->transp.length = 1;
 158                 var->transp.offset = 15;
 159                 break;
 160         case 16:
 161                 var->red.offset = 11;
 162                 var->green.offset = 5;
 163                 var->blue.offset = 0;
 164                 var->red.length = 5;
 165                 var->green.length = 6;
 166                 var->blue.length = 5;
 167                 var->transp.length = 0;
 168                 var->transp.offset = 0;
 169                 break;
 170         case 24:
 171                 var->red.offset = 16;
 172                 var->green.offset = 8;
 173                 var->blue.offset = 0;
 174                 var->red.length = 8;
 175                 var->green.length = 8;
 176                 var->blue.length = 8;
 177                 var->transp.length = 0;
 178                 var->transp.offset = 0;
 179                 break;
 180         case 32:
 181                 var->red.offset = 16;
 182                 var->green.offset = 8;
 183                 var->blue.offset = 0;
 184                 var->red.length = 8;
 185                 var->green.length = 8;
 186                 var->blue.length = 8;
 187                 var->transp.length = 8;
 188                 var->transp.offset = 24;
 189                 break;
 190         default:
 191                 return -EINVAL;
 192         }
 193
 194         return 0;
 195 }
 196
 197 /* this will let fbcon do the mode init */
 198 /* FIXME: take mode config lock? */
 199 static int intelfb_set_par(struct fb_info *info)
 200 {
 201         struct intelfb_par *par = info->par;
 202         struct drm_device *dev = par->dev;
 203         struct fb_var_screeninfo *var = &info->var;
 204         int i;
 205
 206         DRM_DEBUG("%d %d\n", var->xres, var->pixclock);
 207
 208         if (var->pixclock != -1) {
 209
 210                 DRM_ERROR("PIXEL CLOCK SET\n");
 211                 return -EINVAL;
 212         } else {
 213                 struct drm_crtc *crtc;
 214                 int ret;
 215
 216                 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 217                         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 218
 219                         for (i = 0; i < par->crtc_count; i++)
 220                                 if (crtc->base.id == par->crtc_ids[i])
 221                                         break;
 222
 223                         if (i == par->crtc_count)
 224                                 continue;
 225
 226                         if (crtc->fb == intel_crtc->mode_set.fb) {
 227                                 mutex_lock(&dev->mode_config.mutex);
 228                                 ret = crtc->funcs->set_config(&intel_crtc->mode_set);
 229                                 mutex_unlock(&dev->mode_config.mutex);
 230                                 if (ret)
 231                                         return ret;
 232                         }
 233                 }
 234                 return 0;
 235         }
 236 }
 237
 238 static int intelfb_pan_display(struct fb_var_screeninfo *var,
 239                                 struct fb_info *info)
 240 {
 241         struct intelfb_par *par = info->par;
 242         struct drm_device *dev = par->dev;
 243         struct drm_mode_set *modeset;
 244         struct drm_crtc *crtc;
 245         struct intel_crtc *intel_crtc;
 246         int ret = 0;
 247         int i;
 248
 249         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 250                 for (i = 0; i < par->crtc_count; i++)
 251                         if (crtc->base.id == par->crtc_ids[i])
 252                                 break;
 253
 254                 if (i == par->crtc_count)
 255                         continue;
 256
 257                 intel_crtc = to_intel_crtc(crtc);
 258                 modeset = &intel_crtc->mode_set;
 259
 260                 modeset->x = var->xoffset;
 261                 modeset->y = var->yoffset;
 262
 263                 if (modeset->num_connectors) {
 264                         mutex_lock(&dev->mode_config.mutex);
 265                         ret = crtc->funcs->set_config(modeset);
 266                         mutex_unlock(&dev->mode_config.mutex);
 267                         if (!ret) {
 268                                 info->var.xoffset = var->xoffset;
 269                                 info->var.yoffset = var->yoffset;
 270                         }
 271                 }
 272         }
 273
 274         return ret;
 275 }
 276
 277 static void intelfb_on(struct fb_info *info)
 278 {
 279         struct intelfb_par *par = info->par;
 280         struct drm_device *dev = par->dev;
 281         struct drm_crtc *crtc;
 282         struct drm_encoder *encoder;
 283         int i;
 284
 285         /*
 286          * For each CRTC in this fb, find all associated encoders
 287          * and turn them off, then turn off the CRTC.
 288          */
 289         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 290                 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 291
 292                 for (i = 0; i < par->crtc_count; i++)
 293                         if (crtc->base.id == par->crtc_ids[i])
 294                                 break;
 295
 296                 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 297
 298                 /* Found a CRTC on this fb, now find encoders */
 299                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 300                         if (encoder->crtc == crtc) {
 301                                 struct drm_encoder_helper_funcs *encoder_funcs;
 302                                 encoder_funcs = encoder->helper_private;
 303                                 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
 304                         }
 305                 }
 306         }
 307 }
 308
 309 static void intelfb_off(struct fb_info *info, int dpms_mode)
 310 {
 311         struct intelfb_par *par = info->par;
 312         struct drm_device *dev = par->dev;
 313         struct drm_crtc *crtc;
 314         struct drm_encoder *encoder;
 315         int i;
 316
 317         /*
 318          * For each CRTC in this fb, find all associated encoders
 319          * and turn them off, then turn off the CRTC.
 320          */
 321         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 322                 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 323
 324                 for (i = 0; i < par->crtc_count; i++)
 325                         if (crtc->base.id == par->crtc_ids[i])
 326                                 break;
 327
 328                 /* Found a CRTC on this fb, now find encoders */
 329                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 330                         if (encoder->crtc == crtc) {
 331                                 struct drm_encoder_helper_funcs *encoder_funcs;
 332                                 encoder_funcs = encoder->helper_private;
 333                                 encoder_funcs->dpms(encoder, dpms_mode);
 334                         }
 335                 }
 336                 if (dpms_mode == DRM_MODE_DPMS_OFF)
 337                         crtc_funcs->dpms(crtc, dpms_mode);
 338         }
 339 }
 340
 341 static int intelfb_blank(int blank, struct fb_info *info)
 342 {
 343         switch (blank) {
 344         case FB_BLANK_UNBLANK:
 345                 intelfb_on(info);
 346                 break;
 347         case FB_BLANK_NORMAL:
 348                 intelfb_off(info, DRM_MODE_DPMS_STANDBY);
 349                 break;
 350         case FB_BLANK_HSYNC_SUSPEND:
 351                 intelfb_off(info, DRM_MODE_DPMS_STANDBY);
 352                 break;
 353         case FB_BLANK_VSYNC_SUSPEND:
 354                 intelfb_off(info, DRM_MODE_DPMS_SUSPEND);
 355                 break;
 356         case FB_BLANK_POWERDOWN:
 357                 intelfb_off(info, DRM_MODE_DPMS_OFF);
 358                 break;
 359         }
 360         return 0;
 361 }
 362
 363 static struct fb_ops intelfb_ops = {
 364         .owner = THIS_MODULE,
 365         .fb_check_var = intelfb_check_var,
 366         .fb_set_par = intelfb_set_par,
 367         .fb_setcolreg = intelfb_setcolreg,
 368         .fb_fillrect = cfb_fillrect,
 369         .fb_copyarea = cfb_copyarea,
 370         .fb_imageblit = cfb_imageblit,
 371         .fb_pan_display = intelfb_pan_display,
 372         .fb_blank = intelfb_blank,
 373 };
 374
 375 /**
 376  * Curretly it is assumed that the old framebuffer is reused.
 377  *
 378  * LOCKING
 379  * caller should hold the mode config lock.
 380  *
 381  */
 382 int intelfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
 383 {
 384         struct fb_info *info;
 385         struct drm_framebuffer *fb;
 386         struct drm_display_mode *mode = crtc->desired_mode;
 387
 388         fb = crtc->fb;
 389         if (!fb)
 390                 return 1;
 391
 392         info = fb->fbdev;
 393         if (!info)
 394                 return 1;
 395
 396         if (!mode)
 397                 return 1;
 398
 399         info->var.xres = mode->hdisplay;
 400         info->var.right_margin = mode->hsync_start - mode->hdisplay;
 401         info->var.hsync_len = mode->hsync_end - mode->hsync_start;
 402         info->var.left_margin = mode->htotal - mode->hsync_end;
 403         info->var.yres = mode->vdisplay;
 404         info->var.lower_margin = mode->vsync_start - mode->vdisplay;
 405         info->var.vsync_len = mode->vsync_end - mode->vsync_start;
 406         info->var.upper_margin = mode->vtotal - mode->vsync_end;
 407         info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
 408         /* avoid overflow */
 409         info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
 410
 411         return 0;
 412 }
 413 EXPORT_SYMBOL(intelfb_resize);
 414
 415 static struct drm_mode_set kernelfb_mode;
 416
 417 static int intelfb_panic(struct notifier_block *n, unsigned long ununsed,
 418                          void *panic_str)
 419 {
 420         DRM_ERROR("panic occurred, switching back to text console\n");
 421
 422         intelfb_restore();
 423         return 0;
 424 }
 425
 426 static struct notifier_block paniced = {
 427         .notifier_call = intelfb_panic,
 428 };
 429
 430 static int intelfb_create(struct drm_device *dev, uint32_t fb_width,
 431                           uint32_t fb_height, uint32_t surface_width,
 432                           uint32_t surface_height,
 433                           struct intel_framebuffer **intel_fb_p)
 434 {
 435         struct fb_info *info;
 436         struct intelfb_par *par;
 437         struct drm_framebuffer *fb;
 438         struct intel_framebuffer *intel_fb;
 439         struct drm_mode_fb_cmd mode_cmd;
 440         struct drm_gem_object *fbo = NULL;
 441         struct drm_i915_gem_object *obj_priv;
 442         struct device *device = &dev->pdev->dev;
 443         int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
 444
 445         mode_cmd.width = surface_width;
 446         mode_cmd.height = surface_height;
 447
 448         mode_cmd.bpp = 32;
 449         mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
 450         mode_cmd.depth = 24;
 451
 452         size = mode_cmd.pitch * mode_cmd.height;
 453         size = ALIGN(size, PAGE_SIZE);
 454         fbo = drm_gem_object_alloc(dev, size);
 455         if (!fbo) {
 456                 DRM_ERROR("failed to allocate framebuffer\n");
 457                 ret = -ENOMEM;
 458                 goto out;
 459         }
 460         obj_priv = fbo->driver_private;
 461
 462         mutex_lock(&dev->struct_mutex);
 463
 464         ret = i915_gem_object_pin(fbo, PAGE_SIZE);
 465         if (ret) {
 466                 DRM_ERROR("failed to pin fb: %d\n", ret);
 467                 goto out_unref;
 468         }
 469
 470         /* Flush everything out, we'll be doing GTT only from now on */
 471         i915_gem_object_set_to_gtt_domain(fbo, 1);
 472
 473         ret = intel_framebuffer_create(dev, &mode_cmd, &fb, fbo);
 474         if (ret) {
 475                 DRM_ERROR("failed to allocate fb.\n");
 476                 goto out_unpin;
 477         }
 478
 479         list_add(&fb->filp_head, &dev->mode_config.fb_kernel_list);
 480
 481         intel_fb = to_intel_framebuffer(fb);
 482         *intel_fb_p = intel_fb;
 483
 484         info = framebuffer_alloc(sizeof(struct intelfb_par), device);
 485         if (!info) {
 486                 ret = -ENOMEM;
 487                 goto out_unpin;
 488         }
 489
 490         par = info->par;
 491
 492         strcpy(info->fix.id, "inteldrmfb");
 493         info->fix.type = FB_TYPE_PACKED_PIXELS;
 494         info->fix.visual = FB_VISUAL_TRUECOLOR;
 495         info->fix.type_aux = 0;
 496         info->fix.xpanstep = 1; /* doing it in hw */
 497         info->fix.ypanstep = 1; /* doing it in hw */
 498         info->fix.ywrapstep = 0;
 499         info->fix.accel = FB_ACCEL_I830;
 500         info->fix.type_aux = 0;
 501
 502         info->flags = FBINFO_DEFAULT;
 503
 504         info->fbops = &intelfb_ops;
 505
 506         info->fix.line_length = fb->pitch;
 507
 508         /* setup aperture base/size for vesafb takeover */
 509         info->aperture_base = dev->mode_config.fb_base;
 510         if (IS_I9XX(dev))
 511                 info->aperture_size = pci_resource_len(dev->pdev, 2);
 512         else
 513                 info->aperture_size = pci_resource_len(dev->pdev, 0);
 514
 515         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
 516         info->fix.smem_len = size;
 517
 518         info->flags = FBINFO_DEFAULT;
 519
 520         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
 521                                        size);
 522         if (!info->screen_base) {
 523                 ret = -ENOSPC;
 524                 goto out_unpin;
 525         }
 526         info->screen_size = size;
 527
 528 //      memset(info->screen_base, 0, size);
 529
 530         info->pseudo_palette = fb->pseudo_palette;
 531         info->var.xres_virtual = fb->width;
 532         info->var.yres_virtual = fb->height;
 533         info->var.bits_per_pixel = fb->bits_per_pixel;
 534         info->var.xoffset = 0;
 535         info->var.yoffset = 0;
 536         info->var.activate = FB_ACTIVATE_NOW;
 537         info->var.height = -1;
 538         info->var.width = -1;
 539
 540         info->var.xres = fb_width;
 541         info->var.yres = fb_height;
 542
 543         /* FIXME: we really shouldn't expose mmio space at all */
 544         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
 545         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
 546
 547         info->pixmap.size = 64*1024;
 548         info->pixmap.buf_align = 8;
 549         info->pixmap.access_align = 32;
 550         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 551         info->pixmap.scan_align = 1;
 552
 553         switch(fb->depth) {
 554         case 8:
 555                 info->var.red.offset = 0;
 556                 info->var.green.offset = 0;
 557                 info->var.blue.offset = 0;
 558                 info->var.red.length = 8; /* 8bit DAC */
 559                 info->var.green.length = 8;
 560                 info->var.blue.length = 8;
 561                 info->var.transp.offset = 0;
 562                 info->var.transp.length = 0;
 563                 break;
 564         case 15:
 565                 info->var.red.offset = 10;
 566                 info->var.green.offset = 5;
 567                 info->var.blue.offset = 0;
 568                 info->var.red.length = 5;
 569                 info->var.green.length = 5;
 570                 info->var.blue.length = 5;
 571                 info->var.transp.offset = 15;
 572                 info->var.transp.length = 1;
 573                 break;
 574         case 16:
 575                 info->var.red.offset = 11;
 576                 info->var.green.offset = 5;
 577                 info->var.blue.offset = 0;
 578                 info->var.red.length = 5;
 579                 info->var.green.length = 6;
 580                 info->var.blue.length = 5;
 581                 info->var.transp.offset = 0;
 582                 break;
 583         case 24:
 584                 info->var.red.offset = 16;
 585                 info->var.green.offset = 8;
 586                 info->var.blue.offset = 0;
 587                 info->var.red.length = 8;
 588                 info->var.green.length = 8;
 589                 info->var.blue.length = 8;
 590                 info->var.transp.offset = 0;
 591                 info->var.transp.length = 0;
 592                 break;
 593         case 32:
 594                 info->var.red.offset = 16;
 595                 info->var.green.offset = 8;
 596                 info->var.blue.offset = 0;
 597                 info->var.red.length = 8;
 598                 info->var.green.length = 8;
 599                 info->var.blue.length = 8;
 600                 info->var.transp.offset = 24;
 601                 info->var.transp.length = 8;
 602                 break;
 603         default:
 604                 break;
 605         }
 606
 607         fb->fbdev = info;
 608
 609         par->intel_fb = intel_fb;
 610         par->dev = dev;
 611
 612         /* To allow resizeing without swapping buffers */
 613         DRM_DEBUG("allocated %dx%d fb: 0x%08x, bo %p\n", intel_fb->base.width,
 614                   intel_fb->base.height, obj_priv->gtt_offset, fbo);
 615
 616         mutex_unlock(&dev->struct_mutex);
 617         return 0;
 618
 619 out_unpin:
 620         i915_gem_object_unpin(fbo);
 621 out_unref:
 622         drm_gem_object_unreference(fbo);
 623         mutex_unlock(&dev->struct_mutex);
 624 out:
 625         return ret;
 626 }
 627
 628 static int intelfb_multi_fb_probe_crtc(struct drm_device *dev, struct drm_crtc *crtc)
 629 {
 630         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 631         struct intel_framebuffer *intel_fb;
 632         struct drm_framebuffer *fb;
 633         struct drm_connector *connector;
 634         struct fb_info *info;
 635         struct intelfb_par *par;
 636         struct drm_mode_set *modeset;
 637         unsigned int width, height;
 638         int new_fb = 0;
 639         int ret, i, conn_count;
 640
 641         if (!drm_helper_crtc_in_use(crtc))
 642                 return 0;
 643
 644         if (!crtc->desired_mode)
 645                 return 0;
 646
 647         width = crtc->desired_mode->hdisplay;
 648         height = crtc->desired_mode->vdisplay;
 649
 650         /* is there an fb bound to this crtc already */
 651         if (!intel_crtc->mode_set.fb) {
 652                 ret = intelfb_create(dev, width, height, width, height, &intel_fb);
 653                 if (ret)
 654                         return -EINVAL;
 655                 new_fb = 1;
 656         } else {
 657                 fb = intel_crtc->mode_set.fb;
 658                 intel_fb = to_intel_framebuffer(fb);
 659                 if ((intel_fb->base.width < width) || (intel_fb->base.height < height))
 660                         return -EINVAL;
 661         }
 662
 663         info = intel_fb->base.fbdev;
 664         par = info->par;
 665
 666         modeset = &intel_crtc->mode_set;
 667         modeset->fb = &intel_fb->base;
 668         conn_count = 0;
 669         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 670                 if (connector->encoder)
 671                         if (connector->encoder->crtc == modeset->crtc) {
 672                                 modeset->connectors[conn_count] = connector;
 673                                 conn_count++;
 674                                 if (conn_count > INTELFB_CONN_LIMIT)
 675                                         BUG();
 676                         }
 677         }
 678
 679         for (i = conn_count; i < INTELFB_CONN_LIMIT; i++)
 680                 modeset->connectors[i] = NULL;
 681
 682         par->crtc_ids[0] = crtc->base.id;
 683
 684         modeset->num_connectors = conn_count;
 685         if (modeset->crtc->desired_mode) {
 686                 if (modeset->mode)
 687                         drm_mode_destroy(dev, modeset->mode);
 688                 modeset->mode = drm_mode_duplicate(dev,
 689                                                    modeset->crtc->desired_mode);
 690         }
 691
 692         par->crtc_count = 1;
 693
 694         if (new_fb) {
 695                 info->var.pixclock = -1;
 696                 if (register_framebuffer(info) < 0)
 697                         return -EINVAL;
 698         } else
 699                 intelfb_set_par(info);
 700
 701         DRM_INFO("fb%d: %s frame buffer device\n", info->node,
 702                info->fix.id);
 703
 704         /* Switch back to kernel console on panic */
 705         kernelfb_mode = *modeset;
 706         atomic_notifier_chain_register(&panic_notifier_list, &paniced);
 707         DRM_DEBUG("registered panic notifier\n");
 708
 709         return 0;
 710 }
 711
 712 static int intelfb_multi_fb_probe(struct drm_device *dev)
 713 {
 714
 715         struct drm_crtc *crtc;
 716         int ret = 0;
 717
 718         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 719                 ret = intelfb_multi_fb_probe_crtc(dev, crtc);
 720                 if (ret)
 721                         return ret;
 722         }
 723         return ret;
 724 }
 725
 726 static int intelfb_single_fb_probe(struct drm_device *dev)
 727 {
 728         struct drm_crtc *crtc;
 729         struct drm_connector *connector;
 730         unsigned int fb_width = (unsigned)-1, fb_height = (unsigned)-1;
 731         unsigned int surface_width = 0, surface_height = 0;
 732         int new_fb = 0;
 733         int crtc_count = 0;
 734         int ret, i, conn_count = 0;
 735         struct intel_framebuffer *intel_fb;
 736         struct fb_info *info;
 737         struct intelfb_par *par;
 738         struct drm_mode_set *modeset = NULL;
 739
 740         DRM_DEBUG("\n");
 741
 742         /* Get a count of crtcs now in use and new min/maxes width/heights */
 743         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 744                 if (!drm_helper_crtc_in_use(crtc))
 745                         continue;
 746
 747                 crtc_count++;
 748                 if (!crtc->desired_mode)
 749                         continue;
 750
 751                 /* Smallest mode determines console size... */
 752                 if (crtc->desired_mode->hdisplay < fb_width)
 753                         fb_width = crtc->desired_mode->hdisplay;
 754
 755                 if (crtc->desired_mode->vdisplay < fb_height)
 756                         fb_height = crtc->desired_mode->vdisplay;
 757
 758                 /* ... but largest for memory allocation dimensions */
 759                 if (crtc->desired_mode->hdisplay > surface_width)
 760                         surface_width = crtc->desired_mode->hdisplay;
 761
 762                 if (crtc->desired_mode->vdisplay > surface_height)
 763                         surface_height = crtc->desired_mode->vdisplay;
 764         }
 765
 766         if (crtc_count == 0 || fb_width == -1 || fb_height == -1) {
 767                 /* hmm everyone went away - assume VGA cable just fell out
 768                    and will come back later. */
 769                 DRM_DEBUG("no CRTCs available?\n");
 770                 return 0;
 771         }
 772
 773 //fail
 774         /* Find the fb for our new config */
 775         if (list_empty(&dev->mode_config.fb_kernel_list)) {
 776                 DRM_DEBUG("creating new fb (console size %dx%d, "
 777                           "buffer size %dx%d)\n", fb_width, fb_height,
 778                           surface_width, surface_height);
 779                 ret = intelfb_create(dev, fb_width, fb_height, surface_width,
 780                                      surface_height, &intel_fb);
 781                 if (ret)
 782                         return -EINVAL;
 783                 new_fb = 1;
 784         } else {
 785                 struct drm_framebuffer *fb;
 786
 787                 fb = list_first_entry(&dev->mode_config.fb_kernel_list,
 788                                       struct drm_framebuffer, filp_head);
 789                 intel_fb = to_intel_framebuffer(fb);
 790
 791                 /* if someone hotplugs something bigger than we have already
 792                  * allocated, we are pwned.  As really we can't resize an
 793                  * fbdev that is in the wild currently due to fbdev not really
 794                  * being designed for the lower layers moving stuff around
 795                  * under it.
 796                  * - so in the grand style of things - punt.
 797                  */
 798                 if ((fb->width < surface_width) ||
 799                     (fb->height < surface_height)) {
 800                         DRM_ERROR("fb not large enough for console\n");
 801                         return -EINVAL;
 802                 }
 803         }
 804 // fail
 805
 806         info = intel_fb->base.fbdev;
 807         par = info->par;
 808
 809         crtc_count = 0;
 810         /*
 811          * For each CRTC, set up the connector list for the CRTC's mode
 812          * set configuration.
 813          */
 814         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 815                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 816
 817                 modeset = &intel_crtc->mode_set;
 818                 modeset->fb = &intel_fb->base;
 819                 conn_count = 0;
 820                 list_for_each_entry(connector, &dev->mode_config.connector_list,
 821                                     head) {
 822                         if (!connector->encoder)
 823                                 continue;
 824
 825                         if(connector->encoder->crtc == modeset->crtc) {
 826                                 modeset->connectors[conn_count++] = connector;
 827                                 if (conn_count > INTELFB_CONN_LIMIT)
 828                                         BUG();
 829                         }
 830                 }
 831
 832                 /* Zero out remaining connector pointers */
 833                 for (i = conn_count; i < INTELFB_CONN_LIMIT; i++)
 834                         modeset->connectors[i] = NULL;
 835
 836                 par->crtc_ids[crtc_count++] = crtc->base.id;
 837
 838                 modeset->num_connectors = conn_count;
 839                 if (modeset->crtc->desired_mode) {
 840                         if (modeset->mode)
 841                                 drm_mode_destroy(dev, modeset->mode);
 842                         modeset->mode = drm_mode_duplicate(dev,
 843                                                            modeset->crtc->desired_mode);
 844                 }
 845         }
 846         par->crtc_count = crtc_count;
 847
 848         if (new_fb) {
 849                 info->var.pixclock = -1;
 850                 if (register_framebuffer(info) < 0)
 851                         return -EINVAL;
 852         } else
 853                 intelfb_set_par(info);
 854
 855         DRM_INFO("fb%d: %s frame buffer device\n", info->node,
 856                info->fix.id);
 857
 858         /* Switch back to kernel console on panic */
 859         kernelfb_mode = *modeset;
 860         atomic_notifier_chain_register(&panic_notifier_list, &paniced);
 861         DRM_DEBUG("registered panic notifier\n");
 862
 863         return 0;
 864 }
 865
 866 /**
 867  * intelfb_restore - restore the framebuffer console (kernel) config
 868  *
 869  * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
 870  */
 871 void intelfb_restore(void)
 872 {
 873         int ret;
 874         if ((ret = drm_crtc_helper_set_config(&kernelfb_mode)) != 0) {
 875                 DRM_ERROR("Failed to restore crtc configuration: %d\n",
 876                           ret);
 877         }
 878 }
 879
 880 static void intelfb_restore_work_fn(struct work_struct *ignored)
 881 {
 882         intelfb_restore();
 883 }
 884 static DECLARE_WORK(intelfb_restore_work, intelfb_restore_work_fn);
 885
 886 static void intelfb_sysrq(int dummy1, struct tty_struct *dummy3)
 887 {
 888         schedule_work(&intelfb_restore_work);
 889 }
 890
 891 static struct sysrq_key_op sysrq_intelfb_restore_op = {
 892         .handler = intelfb_sysrq,
 893         .help_msg = "force-fb(V)",
 894         .action_msg = "Restore framebuffer console",
 895 };
 896
 897 int intelfb_probe(struct drm_device *dev)
 898 {
 899         int ret;
 900
 901         DRM_DEBUG("\n");
 902
 903         /* something has changed in the lower levels of hell - deal with it
 904            here */
 905
 906         /* two modes : a) 1 fb to rule all crtcs.
 907                        b) one fb per crtc.
 908            two actions 1) new connected device
 909                        2) device removed.
 910            case a/1 : if the fb surface isn't big enough - resize the surface fb.
 911                       if the fb size isn't big enough - resize fb into surface.
 912                       if everything big enough configure the new crtc/etc.
 913            case a/2 : undo the configuration
 914                       possibly resize down the fb to fit the new configuration.
 915            case b/1 : see if it is on a new crtc - setup a new fb and add it.
 916            case b/2 : teardown the new fb.
 917         */
 918
 919         /* mode a first */
 920         /* search for an fb */
 921         if (i915_fbpercrtc == 1) {
 922                 ret = intelfb_multi_fb_probe(dev);
 923         } else {
 924                 ret = intelfb_single_fb_probe(dev);
 925         }
 926
 927         register_sysrq_key('v', &sysrq_intelfb_restore_op);
 928
 929         return ret;
 930 }
 931 EXPORT_SYMBOL(intelfb_probe);
 932
 933 int intelfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
 934 {
 935         struct fb_info *info;
 936
 937         if (!fb)
 938                 return -EINVAL;
 939
 940         info = fb->fbdev;
 941
 942         if (info) {
 943                 unregister_framebuffer(info);
 944                 iounmap(info->screen_base);
 945                 framebuffer_release(info);
 946         }
 947
 948         atomic_notifier_chain_unregister(&panic_notifier_list, &paniced);
 949         memset(&kernelfb_mode, 0, sizeof(struct drm_mode_set));
 950         return 0;
 951 }
 952 EXPORT_SYMBOL(intelfb_remove);
 953 MODULE_LICENSE("GPL and additional rights");