include/drm/drm_fb_helper.h

   1 /*
   2  * Copyright (c) 2006-2009 Red Hat Inc.
   3  * Copyright (c) 2006-2008 Intel Corporation
   4  * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
   5  *
   6  * DRM framebuffer helper functions
   7  *
   8  * Permission to use, copy, modify, distribute, and sell this software and its
   9  * documentation for any purpose is hereby granted without fee, provided that
  10  * the above copyright notice appear in all copies and that both that copyright
  11  * notice and this permission notice appear in supporting documentation, and
  12  * that the name of the copyright holders not be used in advertising or
  13  * publicity pertaining to distribution of the software without specific,
  14  * written prior permission.  The copyright holders make no representations
  15  * about the suitability of this software for any purpose.  It is provided "as
  16  * is" without express or implied warranty.
  17  *
  18  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  19  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  20  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  21  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  22  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  23  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  24  * OF THIS SOFTWARE.
  25  *
  26  * Authors:
  27  *      Dave Airlie <airlied@linux.ie>
  28  *      Jesse Barnes <jesse.barnes@intel.com>
  29  */
  30 #ifndef DRM_FB_HELPER_H
  31 #define DRM_FB_HELPER_H
  32
  33 struct drm_fb_helper;
  34
  35 #include <drm/drm_client.h>
  36 #include <drm/drm_crtc.h>
  37 #include <drm/drm_device.h>
  38 #include <linux/kgdb.h>
  39 #include <linux/vgaarb.h>
  40
  41 enum mode_set_atomic {
  42         LEAVE_ATOMIC_MODE_SET,
  43         ENTER_ATOMIC_MODE_SET,
  44 };
  45
  46 struct drm_fb_offset {
  47         int x, y;
  48 };
  49
  50 struct drm_fb_helper_crtc {
  51         struct drm_mode_set mode_set;
  52         struct drm_display_mode *desired_mode;
  53         int x, y;
  54         int rotation;
  55 };
  56
  57 /**
  58  * struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size
  59  * @fb_width: fbdev width
  60  * @fb_height: fbdev height
  61  * @surface_width: scanout buffer width
  62  * @surface_height: scanout buffer height
  63  * @surface_bpp: scanout buffer bpp
  64  * @surface_depth: scanout buffer depth
  65  *
  66  * Note that the scanout surface width/height may be larger than the fbdev
  67  * width/height.  In case of multiple displays, the scanout surface is sized
  68  * according to the largest width/height (so it is large enough for all CRTCs
  69  * to scanout).  But the fbdev width/height is sized to the minimum width/
  70  * height of all the displays.  This ensures that fbcon fits on the smallest
  71  * of the attached displays. fb_width/fb_height is used by
  72  * drm_fb_helper_fill_info() to fill out the &fb_info.var structure.
  73  */
  74 struct drm_fb_helper_surface_size {
  75         u32 fb_width;
  76         u32 fb_height;
  77         u32 surface_width;
  78         u32 surface_height;
  79         u32 surface_bpp;
  80         u32 surface_depth;
  81 };
  82
  83 /**
  84  * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
  85  *
  86  * Driver callbacks used by the fbdev emulation helper library.
  87  */
  88 struct drm_fb_helper_funcs {
  89         /**
  90          * @fb_probe:
  91          *
  92          * Driver callback to allocate and initialize the fbdev info structure.
  93          * Furthermore it also needs to allocate the DRM framebuffer used to
  94          * back the fbdev.
  95          *
  96          * This callback is mandatory.
  97          *
  98          * RETURNS:
  99          *
 100          * The driver should return 0 on success and a negative error code on
 101          * failure.
 102          */
 103         int (*fb_probe)(struct drm_fb_helper *helper,
 104                         struct drm_fb_helper_surface_size *sizes);
 105
 106         /**
 107          * @initial_config:
 108          *
 109          * Driver callback to setup an initial fbdev display configuration.
 110          * Drivers can use this callback to tell the fbdev emulation what the
 111          * preferred initial configuration is. This is useful to implement
 112          * smooth booting where the fbdev (and subsequently all userspace) never
 113          * changes the mode, but always inherits the existing configuration.
 114          *
 115          * This callback is optional.
 116          *
 117          * RETURNS:
 118          *
 119          * The driver should return true if a suitable initial configuration has
 120          * been filled out and false when the fbdev helper should fall back to
 121          * the default probing logic.
 122          */
 123         bool (*initial_config)(struct drm_fb_helper *fb_helper,
 124                                struct drm_fb_helper_crtc **crtcs,
 125                                struct drm_display_mode **modes,
 126                                struct drm_fb_offset *offsets,
 127                                bool *enabled, int width, int height);
 128 };
 129
 130 struct drm_fb_helper_connector {
 131         struct drm_connector *connector;
 132 };
 133
 134 /**
 135  * struct drm_fb_helper - main structure to emulate fbdev on top of KMS
 136  * @fb: Scanout framebuffer object
 137  * @dev: DRM device
 138  * @crtc_count: number of possible CRTCs
 139  * @crtc_info: per-CRTC helper state (mode, x/y offset, etc)
 140  * @connector_count: number of connected connectors
 141  * @connector_info_alloc_count: size of connector_info
 142  * @funcs: driver callbacks for fb helper
 143  * @fbdev: emulated fbdev device info struct
 144  * @pseudo_palette: fake palette of 16 colors
 145  * @dirty_clip: clip rectangle used with deferred_io to accumulate damage to
 146  *              the screen buffer
 147  * @dirty_lock: spinlock protecting @dirty_clip
 148  * @dirty_work: worker used to flush the framebuffer
 149  * @resume_work: worker used during resume if the console lock is already taken
 150  *
 151  * This is the main structure used by the fbdev helpers. Drivers supporting
 152  * fbdev emulation should embedded this into their overall driver structure.
 153  * Drivers must also fill out a &struct drm_fb_helper_funcs with a few
 154  * operations.
 155  */
 156 struct drm_fb_helper {
 157         /**
 158          * @client:
 159          *
 160          * DRM client used by the generic fbdev emulation.
 161          */
 162         struct drm_client_dev client;
 163
 164         /**
 165          * @buffer:
 166          *
 167          * Framebuffer used by the generic fbdev emulation.
 168          */
 169         struct drm_client_buffer *buffer;
 170
 171         struct drm_framebuffer *fb;
 172         struct drm_device *dev;
 173         int crtc_count;
 174         struct drm_fb_helper_crtc *crtc_info;
 175         int connector_count;
 176         int connector_info_alloc_count;
 177         /**
 178          * @sw_rotations:
 179          * Bitmask of all rotations requested for panel-orientation which
 180          * could not be handled in hardware. If only one bit is set
 181          * fbdev->fbcon_rotate_hint gets set to the requested rotation.
 182          */
 183         int sw_rotations;
 184         /**
 185          * @connector_info:
 186          *
 187          * Array of per-connector information. Do not iterate directly, but use
 188          * drm_fb_helper_for_each_connector.
 189          */
 190         struct drm_fb_helper_connector **connector_info;
 191         const struct drm_fb_helper_funcs *funcs;
 192         struct fb_info *fbdev;
 193         u32 pseudo_palette[17];
 194         struct drm_clip_rect dirty_clip;
 195         spinlock_t dirty_lock;
 196         struct work_struct dirty_work;
 197         struct work_struct resume_work;
 198
 199         /**
 200          * @lock:
 201          *
 202          * Top-level FBDEV helper lock. This protects all internal data
 203          * structures and lists, such as @connector_info and @crtc_info.
 204          *
 205          * FIXME: fbdev emulation locking is a mess and long term we want to
 206          * protect all helper internal state with this lock as well as reduce
 207          * core KMS locking as much as possible.
 208          */
 209         struct mutex lock;
 210
 211         /**
 212          * @kernel_fb_list:
 213          *
 214          * Entry on the global kernel_fb_helper_list, used for kgdb entry/exit.
 215          */
 216         struct list_head kernel_fb_list;
 217
 218         /**
 219          * @delayed_hotplug:
 220          *
 221          * A hotplug was received while fbdev wasn't in control of the DRM
 222          * device, i.e. another KMS master was active. The output configuration
 223          * needs to be reprobe when fbdev is in control again.
 224          */
 225         bool delayed_hotplug;
 226
 227         /**
 228          * @deferred_setup:
 229          *
 230          * If no outputs are connected (disconnected or unknown) the FB helper
 231          * code will defer setup until at least one of the outputs shows up.
 232          * This field keeps track of the status so that setup can be retried
 233          * at every hotplug event until it succeeds eventually.
 234          *
 235          * Protected by @lock.
 236          */
 237         bool deferred_setup;
 238
 239         /**
 240          * @preferred_bpp:
 241          *
 242          * Temporary storage for the driver's preferred BPP setting passed to
 243          * FB helper initialization. This needs to be tracked so that deferred
 244          * FB helper setup can pass this on.
 245          *
 246          * See also: @deferred_setup
 247          */
 248         int preferred_bpp;
 249 };
 250
 251 static inline struct drm_fb_helper *
 252 drm_fb_helper_from_client(struct drm_client_dev *client)
 253 {
 254         return container_of(client, struct drm_fb_helper, client);
 255 }
 256
 257 /**
 258  * define DRM_FB_HELPER_DEFAULT_OPS - helper define for drm drivers
 259  *
 260  * Helper define to register default implementations of drm_fb_helper
 261  * functions. To be used in struct fb_ops of drm drivers.
 262  */
 263 #define DRM_FB_HELPER_DEFAULT_OPS \
 264         .fb_check_var   = drm_fb_helper_check_var, \
 265         .fb_set_par     = drm_fb_helper_set_par, \
 266         .fb_setcmap     = drm_fb_helper_setcmap, \
 267         .fb_blank       = drm_fb_helper_blank, \
 268         .fb_pan_display = drm_fb_helper_pan_display, \
 269         .fb_debug_enter = drm_fb_helper_debug_enter, \
 270         .fb_debug_leave = drm_fb_helper_debug_leave, \
 271         .fb_ioctl       = drm_fb_helper_ioctl
 272
 273 #ifdef CONFIG_DRM_FBDEV_EMULATION
 274 void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,
 275                            const struct drm_fb_helper_funcs *funcs);
 276 int drm_fb_helper_init(struct drm_device *dev,
 277                        struct drm_fb_helper *helper, int max_conn);
 278 void drm_fb_helper_fini(struct drm_fb_helper *helper);
 279 int drm_fb_helper_blank(int blank, struct fb_info *info);
 280 int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
 281                               struct fb_info *info);
 282 int drm_fb_helper_set_par(struct fb_info *info);
 283 int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
 284                             struct fb_info *info);
 285
 286 int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper);
 287
 288 struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper);
 289 void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper);
 290 void drm_fb_helper_fill_info(struct fb_info *info,
 291                              struct drm_fb_helper *fb_helper,
 292                              struct drm_fb_helper_surface_size *sizes);
 293
 294 void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper);
 295
 296 void drm_fb_helper_deferred_io(struct fb_info *info,
 297                                struct list_head *pagelist);
 298 int drm_fb_helper_defio_init(struct drm_fb_helper *fb_helper);
 299
 300 ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
 301                                size_t count, loff_t *ppos);
 302 ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
 303                                 size_t count, loff_t *ppos);
 304
 305 void drm_fb_helper_sys_fillrect(struct fb_info *info,
 306                                 const struct fb_fillrect *rect);
 307 void drm_fb_helper_sys_copyarea(struct fb_info *info,
 308                                 const struct fb_copyarea *area);
 309 void drm_fb_helper_sys_imageblit(struct fb_info *info,
 310                                  const struct fb_image *image);
 311
 312 void drm_fb_helper_cfb_fillrect(struct fb_info *info,
 313                                 const struct fb_fillrect *rect);
 314 void drm_fb_helper_cfb_copyarea(struct fb_info *info,
 315                                 const struct fb_copyarea *area);
 316 void drm_fb_helper_cfb_imageblit(struct fb_info *info,
 317                                  const struct fb_image *image);
 318
 319 void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend);
 320 void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper,
 321                                         bool suspend);
 322
 323 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
 324
 325 int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,
 326                         unsigned long arg);
 327
 328 int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
 329 int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
 330 int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
 331 int drm_fb_helper_debug_enter(struct fb_info *info);
 332 int drm_fb_helper_debug_leave(struct fb_info *info);
 333 struct drm_display_mode *
 334 drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
 335                         int width, int height);
 336 struct drm_display_mode *
 337 drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn);
 338
 339 int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector);
 340 int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
 341                                        struct drm_connector *connector);
 342
 343 int drm_fb_helper_fbdev_setup(struct drm_device *dev,
 344                               struct drm_fb_helper *fb_helper,
 345                               const struct drm_fb_helper_funcs *funcs,
 346                               unsigned int preferred_bpp,
 347                               unsigned int max_conn_count);
 348 void drm_fb_helper_fbdev_teardown(struct drm_device *dev);
 349
 350 void drm_fb_helper_lastclose(struct drm_device *dev);
 351 void drm_fb_helper_output_poll_changed(struct drm_device *dev);
 352
 353 int drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper,
 354                                 struct drm_fb_helper_surface_size *sizes);
 355 int drm_fbdev_generic_setup(struct drm_device *dev, unsigned int preferred_bpp);
 356 #else
 357 static inline void drm_fb_helper_prepare(struct drm_device *dev,
 358                                         struct drm_fb_helper *helper,
 359                                         const struct drm_fb_helper_funcs *funcs)
 360 {
 361 }
 362
 363 static inline int drm_fb_helper_init(struct drm_device *dev,
 364                        struct drm_fb_helper *helper,
 365                        int max_conn)
 366 {
 367         /* So drivers can use it to free the struct */
 368         helper->dev = dev;
 369         dev->fb_helper = helper;
 370
 371         return 0;
 372 }
 373
 374 static inline void drm_fb_helper_fini(struct drm_fb_helper *helper)
 375 {
 376         if (helper && helper->dev)
 377                 helper->dev->fb_helper = NULL;
 378 }
 379
 380 static inline int drm_fb_helper_blank(int blank, struct fb_info *info)
 381 {
 382         return 0;
 383 }
 384
 385 static inline int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
 386                                             struct fb_info *info)
 387 {
 388         return 0;
 389 }
 390
 391 static inline int drm_fb_helper_set_par(struct fb_info *info)
 392 {
 393         return 0;
 394 }
 395
 396 static inline int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
 397                                           struct fb_info *info)
 398 {
 399         return 0;
 400 }
 401
 402 static inline int
 403 drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper)
 404 {
 405         return 0;
 406 }
 407
 408 static inline struct fb_info *
 409 drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper)
 410 {
 411         return NULL;
 412 }
 413
 414 static inline void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper)
 415 {
 416 }
 417
 418 static inline void
 419 drm_fb_helper_fill_info(struct fb_info *info,
 420                         struct drm_fb_helper *fb_helper,
 421                         struct drm_fb_helper_surface_size *sizes)
 422 {
 423 }
 424
 425 static inline int drm_fb_helper_setcmap(struct fb_cmap *cmap,
 426                                         struct fb_info *info)
 427 {
 428         return 0;
 429 }
 430
 431 static inline int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,
 432                                       unsigned long arg)
 433 {
 434         return 0;
 435 }
 436
 437 static inline void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper)
 438 {
 439 }
 440
 441 static inline void drm_fb_helper_deferred_io(struct fb_info *info,
 442                                              struct list_head *pagelist)
 443 {
 444 }
 445
 446 static inline int drm_fb_helper_defio_init(struct drm_fb_helper *fb_helper)
 447 {
 448         return -ENODEV;
 449 }
 450
 451 static inline ssize_t drm_fb_helper_sys_read(struct fb_info *info,
 452                                              char __user *buf, size_t count,
 453                                              loff_t *ppos)
 454 {
 455         return -ENODEV;
 456 }
 457
 458 static inline ssize_t drm_fb_helper_sys_write(struct fb_info *info,
 459                                               const char __user *buf,
 460                                               size_t count, loff_t *ppos)
 461 {
 462         return -ENODEV;
 463 }
 464
 465 static inline void drm_fb_helper_sys_fillrect(struct fb_info *info,
 466                                               const struct fb_fillrect *rect)
 467 {
 468 }
 469
 470 static inline void drm_fb_helper_sys_copyarea(struct fb_info *info,
 471                                               const struct fb_copyarea *area)
 472 {
 473 }
 474
 475 static inline void drm_fb_helper_sys_imageblit(struct fb_info *info,
 476                                                const struct fb_image *image)
 477 {
 478 }
 479
 480 static inline void drm_fb_helper_cfb_fillrect(struct fb_info *info,
 481                                               const struct fb_fillrect *rect)
 482 {
 483 }
 484
 485 static inline void drm_fb_helper_cfb_copyarea(struct fb_info *info,
 486                                               const struct fb_copyarea *area)
 487 {
 488 }
 489
 490 static inline void drm_fb_helper_cfb_imageblit(struct fb_info *info,
 491                                                const struct fb_image *image)
 492 {
 493 }
 494
 495 static inline void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper,
 496                                              bool suspend)
 497 {
 498 }
 499
 500 static inline void
 501 drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, bool suspend)
 502 {
 503 }
 504
 505 static inline int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
 506 {
 507         return 0;
 508 }
 509
 510 static inline int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper,
 511                                                int bpp_sel)
 512 {
 513         return 0;
 514 }
 515
 516 static inline int
 517 drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
 518 {
 519         return 0;
 520 }
 521
 522 static inline int drm_fb_helper_debug_enter(struct fb_info *info)
 523 {
 524         return 0;
 525 }
 526
 527 static inline int drm_fb_helper_debug_leave(struct fb_info *info)
 528 {
 529         return 0;
 530 }
 531
 532 static inline struct drm_display_mode *
 533 drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
 534                        int width, int height)
 535 {
 536         return NULL;
 537 }
 538
 539 static inline struct drm_display_mode *
 540 drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
 541                       int width, int height)
 542 {
 543         return NULL;
 544 }
 545
 546 static inline int
 547 drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
 548                                 struct drm_connector *connector)
 549 {
 550         return 0;
 551 }
 552
 553 static inline int
 554 drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
 555                                    struct drm_connector *connector)
 556 {
 557         return 0;
 558 }
 559
 560 static inline int
 561 drm_fb_helper_fbdev_setup(struct drm_device *dev,
 562                           struct drm_fb_helper *fb_helper,
 563                           const struct drm_fb_helper_funcs *funcs,
 564                           unsigned int preferred_bpp,
 565                           unsigned int max_conn_count)
 566 {
 567         /* So drivers can use it to free the struct */
 568         dev->fb_helper = fb_helper;
 569
 570         return 0;
 571 }
 572
 573 static inline void drm_fb_helper_fbdev_teardown(struct drm_device *dev)
 574 {
 575         dev->fb_helper = NULL;
 576 }
 577
 578 static inline void drm_fb_helper_lastclose(struct drm_device *dev)
 579 {
 580 }
 581
 582 static inline void drm_fb_helper_output_poll_changed(struct drm_device *dev)
 583 {
 584 }
 585
 586 static inline int
 587 drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper,
 588                             struct drm_fb_helper_surface_size *sizes)
 589 {
 590         return 0;
 591 }
 592
 593 static inline int
 594 drm_fbdev_generic_setup(struct drm_device *dev, unsigned int preferred_bpp)
 595 {
 596         return 0;
 597 }
 598
 599 #endif
 600
 601 /**
 602  * drm_fb_helper_remove_conflicting_framebuffers - remove firmware-configured framebuffers
 603  * @a: memory range, users of which are to be removed
 604  * @name: requesting driver name
 605  * @primary: also kick vga16fb if present
 606  *
 607  * This function removes framebuffer devices (initialized by firmware/bootloader)
 608  * which use memory range described by @a. If @a is NULL all such devices are
 609  * removed.
 610  */
 611 static inline int
 612 drm_fb_helper_remove_conflicting_framebuffers(struct apertures_struct *a,
 613                                               const char *name, bool primary)
 614 {
 615 #if IS_REACHABLE(CONFIG_FB)
 616         return remove_conflicting_framebuffers(a, name, primary);
 617 #else
 618         return 0;
 619 #endif
 620 }
 621
 622 /**
 623  * drm_fb_helper_remove_conflicting_pci_framebuffers - remove firmware-configured framebuffers for PCI devices
 624  * @pdev: PCI device
 625  * @resource_id: index of PCI BAR configuring framebuffer memory
 626  * @name: requesting driver name
 627  *
 628  * This function removes framebuffer devices (eg. initialized by firmware)
 629  * using memory range configured for @pdev's BAR @resource_id.
 630  *
 631  * The function assumes that PCI device with shadowed ROM drives a primary
 632  * display and so kicks out vga16fb.
 633  */
 634 static inline int
 635 drm_fb_helper_remove_conflicting_pci_framebuffers(struct pci_dev *pdev,
 636                                                   int resource_id,
 637                                                   const char *name)
 638 {
 639         int ret = 0;
 640
 641         /*
 642          * WARNING: Apparently we must kick fbdev drivers before vgacon,
 643          * otherwise the vga fbdev driver falls over.
 644          */
 645 #if IS_REACHABLE(CONFIG_FB)
 646         ret = remove_conflicting_pci_framebuffers(pdev, resource_id, name);
 647 #endif
 648         if (ret == 0)
 649                 ret = vga_remove_vgacon(pdev);
 650         return ret;
 651 }
 652
 653 #endif