1 /* 2 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 4 * Copyright (c) 2009-2010, Code Aurora Forum. 5 * Copyright 2016 Intel Corp. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the next 15 * paragraph) shall be included in all copies or substantial portions of the 16 * Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 24 * OTHER DEALINGS IN THE SOFTWARE. 25 */ 26 27 #ifndef _DRM_DRV_H_ 28 #define _DRM_DRV_H_ 29 30 #include <linux/list.h> 31 #include <linux/irqreturn.h> 32 33 #include <drm/drm_device.h> 34 35 struct drm_file; 36 struct drm_gem_object; 37 struct drm_master; 38 struct drm_minor; 39 struct dma_buf_attachment; 40 struct drm_display_mode; 41 struct drm_mode_create_dumb; 42 struct drm_printer; 43 44 /** 45 * enum drm_driver_feature - feature flags 46 * 47 * See &drm_driver.driver_features, drm_device.driver_features and 48 * drm_core_check_feature(). 49 */ 50 enum drm_driver_feature { 51 /** 52 * @DRIVER_GEM: 53 * 54 * Driver use the GEM memory manager. This should be set for all modern 55 * drivers. 56 */ 57 DRIVER_GEM = BIT(0), 58 /** 59 * @DRIVER_MODESET: 60 * 61 * Driver supports mode setting interfaces (KMS). 62 */ 63 DRIVER_MODESET = BIT(1), 64 /** 65 * @DRIVER_RENDER: 66 * 67 * Driver supports dedicated render nodes. See also the :ref:`section on 68 * render nodes <drm_render_node>` for details. 69 */ 70 DRIVER_RENDER = BIT(3), 71 /** 72 * @DRIVER_ATOMIC: 73 * 74 * Driver supports the full atomic modesetting userspace API. Drivers 75 * which only use atomic internally, but do not the support the full 76 * userspace API (e.g. not all properties converted to atomic, or 77 * multi-plane updates are not guaranteed to be tear-free) should not 78 * set this flag. 79 */ 80 DRIVER_ATOMIC = BIT(4), 81 /** 82 * @DRIVER_SYNCOBJ: 83 * 84 * Driver supports &drm_syncobj for explicit synchronization of command 85 * submission. 86 */ 87 DRIVER_SYNCOBJ = BIT(5), 88 /** 89 * @DRIVER_SYNCOBJ_TIMELINE: 90 * 91 * Driver supports the timeline flavor of &drm_syncobj for explicit 92 * synchronization of command submission. 93 */ 94 DRIVER_SYNCOBJ_TIMELINE = BIT(6), 95 96 /* IMPORTANT: Below are all the legacy flags, add new ones above. */ 97 98 /** 99 * @DRIVER_USE_AGP: 100 * 101 * Set up DRM AGP support, see drm_agp_init(), the DRM core will manage 102 * AGP resources. New drivers don't need this. 103 */ 104 DRIVER_USE_AGP = BIT(25), 105 /** 106 * @DRIVER_LEGACY: 107 * 108 * Denote a legacy driver using shadow attach. Do not use. 109 */ 110 DRIVER_LEGACY = BIT(26), 111 /** 112 * @DRIVER_PCI_DMA: 113 * 114 * Driver is capable of PCI DMA, mapping of PCI DMA buffers to userspace 115 * will be enabled. Only for legacy drivers. Do not use. 116 */ 117 DRIVER_PCI_DMA = BIT(27), 118 /** 119 * @DRIVER_SG: 120 * 121 * Driver can perform scatter/gather DMA, allocation and mapping of 122 * scatter/gather buffers will be enabled. Only for legacy drivers. Do 123 * not use. 124 */ 125 DRIVER_SG = BIT(28), 126 127 /** 128 * @DRIVER_HAVE_DMA: 129 * 130 * Driver supports DMA, the userspace DMA API will be supported. Only 131 * for legacy drivers. Do not use. 132 */ 133 DRIVER_HAVE_DMA = BIT(29), 134 /** 135 * @DRIVER_HAVE_IRQ: 136 * 137 * Legacy irq support. Only for legacy drivers. Do not use. 138 * 139 * New drivers can either use the drm_irq_install() and 140 * drm_irq_uninstall() helper functions, or roll their own irq support 141 * code by calling request_irq() directly. 142 */ 143 DRIVER_HAVE_IRQ = BIT(30), 144 /** 145 * @DRIVER_KMS_LEGACY_CONTEXT: 146 * 147 * Used only by nouveau for backwards compatibility with existing 148 * userspace. Do not use. 149 */ 150 DRIVER_KMS_LEGACY_CONTEXT = BIT(31), 151 }; 152 153 /** 154 * struct drm_driver - DRM driver structure 155 * 156 * This structure represent the common code for a family of cards. There will be 157 * one &struct drm_device for each card present in this family. It contains lots 158 * of vfunc entries, and a pile of those probably should be moved to more 159 * appropriate places like &drm_mode_config_funcs or into a new operations 160 * structure for GEM drivers. 161 */ 162 struct drm_driver { 163 /** 164 * @load: 165 * 166 * Backward-compatible driver callback to complete 167 * initialization steps after the driver is registered. For 168 * this reason, may suffer from race conditions and its use is 169 * deprecated for new drivers. It is therefore only supported 170 * for existing drivers not yet converted to the new scheme. 171 * See drm_dev_init() and drm_dev_register() for proper and 172 * race-free way to set up a &struct drm_device. 173 * 174 * This is deprecated, do not use! 175 * 176 * Returns: 177 * 178 * Zero on success, non-zero value on failure. 179 */ 180 int (*load) (struct drm_device *, unsigned long flags); 181 182 /** 183 * @open: 184 * 185 * Driver callback when a new &struct drm_file is opened. Useful for 186 * setting up driver-private data structures like buffer allocators, 187 * execution contexts or similar things. Such driver-private resources 188 * must be released again in @postclose. 189 * 190 * Since the display/modeset side of DRM can only be owned by exactly 191 * one &struct drm_file (see &drm_file.is_master and &drm_device.master) 192 * there should never be a need to set up any modeset related resources 193 * in this callback. Doing so would be a driver design bug. 194 * 195 * Returns: 196 * 197 * 0 on success, a negative error code on failure, which will be 198 * promoted to userspace as the result of the open() system call. 199 */ 200 int (*open) (struct drm_device *, struct drm_file *); 201 202 /** 203 * @postclose: 204 * 205 * One of the driver callbacks when a new &struct drm_file is closed. 206 * Useful for tearing down driver-private data structures allocated in 207 * @open like buffer allocators, execution contexts or similar things. 208 * 209 * Since the display/modeset side of DRM can only be owned by exactly 210 * one &struct drm_file (see &drm_file.is_master and &drm_device.master) 211 * there should never be a need to tear down any modeset related 212 * resources in this callback. Doing so would be a driver design bug. 213 */ 214 void (*postclose) (struct drm_device *, struct drm_file *); 215 216 /** 217 * @lastclose: 218 * 219 * Called when the last &struct drm_file has been closed and there's 220 * currently no userspace client for the &struct drm_device. 221 * 222 * Modern drivers should only use this to force-restore the fbdev 223 * framebuffer using drm_fb_helper_restore_fbdev_mode_unlocked(). 224 * Anything else would indicate there's something seriously wrong. 225 * Modern drivers can also use this to execute delayed power switching 226 * state changes, e.g. in conjunction with the :ref:`vga_switcheroo` 227 * infrastructure. 228 * 229 * This is called after @postclose hook has been called. 230 * 231 * NOTE: 232 * 233 * All legacy drivers use this callback to de-initialize the hardware. 234 * This is purely because of the shadow-attach model, where the DRM 235 * kernel driver does not really own the hardware. Instead ownershipe is 236 * handled with the help of userspace through an inheritedly racy dance 237 * to set/unset the VT into raw mode. 238 * 239 * Legacy drivers initialize the hardware in the @firstopen callback, 240 * which isn't even called for modern drivers. 241 */ 242 void (*lastclose) (struct drm_device *); 243 244 /** 245 * @unload: 246 * 247 * Reverse the effects of the driver load callback. Ideally, 248 * the clean up performed by the driver should happen in the 249 * reverse order of the initialization. Similarly to the load 250 * hook, this handler is deprecated and its usage should be 251 * dropped in favor of an open-coded teardown function at the 252 * driver layer. See drm_dev_unregister() and drm_dev_put() 253 * for the proper way to remove a &struct drm_device. 254 * 255 * The unload() hook is called right after unregistering 256 * the device. 257 * 258 */ 259 void (*unload) (struct drm_device *); 260 261 /** 262 * @release: 263 * 264 * Optional callback for destroying device data after the final 265 * reference is released, i.e. the device is being destroyed. 266 * 267 * This is deprecated, clean up all memory allocations associated with a 268 * &drm_device using drmm_add_action(), drmm_kmalloc() and related 269 * managed resources functions. 270 */ 271 void (*release) (struct drm_device *); 272 273 /** 274 * @irq_handler: 275 * 276 * Interrupt handler called when using drm_irq_install(). Not used by 277 * drivers which implement their own interrupt handling. 278 */ 279 irqreturn_t(*irq_handler) (int irq, void *arg); 280 281 /** 282 * @irq_preinstall: 283 * 284 * Optional callback used by drm_irq_install() which is called before 285 * the interrupt handler is registered. This should be used to clear out 286 * any pending interrupts (from e.g. firmware based drives) and reset 287 * the interrupt handling registers. 288 */ 289 void (*irq_preinstall) (struct drm_device *dev); 290 291 /** 292 * @irq_postinstall: 293 * 294 * Optional callback used by drm_irq_install() which is called after 295 * the interrupt handler is registered. This should be used to enable 296 * interrupt generation in the hardware. 297 */ 298 int (*irq_postinstall) (struct drm_device *dev); 299 300 /** 301 * @irq_uninstall: 302 * 303 * Optional callback used by drm_irq_uninstall() which is called before 304 * the interrupt handler is unregistered. This should be used to disable 305 * interrupt generation in the hardware. 306 */ 307 void (*irq_uninstall) (struct drm_device *dev); 308 309 /** 310 * @master_set: 311 * 312 * Called whenever the minor master is set. Only used by vmwgfx. 313 */ 314 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv, 315 bool from_open); 316 /** 317 * @master_drop: 318 * 319 * Called whenever the minor master is dropped. Only used by vmwgfx. 320 */ 321 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv); 322 323 /** 324 * @debugfs_init: 325 * 326 * Allows drivers to create driver-specific debugfs files. 327 */ 328 void (*debugfs_init)(struct drm_minor *minor); 329 330 /** 331 * @gem_free_object_unlocked: deconstructor for drm_gem_objects 332 * 333 * This is deprecated and should not be used by new drivers. Use 334 * &drm_gem_object_funcs.free instead. 335 */ 336 void (*gem_free_object_unlocked) (struct drm_gem_object *obj); 337 338 /** 339 * @gem_open_object: 340 * 341 * This callback is deprecated in favour of &drm_gem_object_funcs.open. 342 * 343 * Driver hook called upon gem handle creation 344 */ 345 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *); 346 347 /** 348 * @gem_close_object: 349 * 350 * This callback is deprecated in favour of &drm_gem_object_funcs.close. 351 * 352 * Driver hook called upon gem handle release 353 */ 354 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *); 355 356 /** 357 * @gem_print_info: 358 * 359 * This callback is deprecated in favour of 360 * &drm_gem_object_funcs.print_info. 361 * 362 * If driver subclasses struct &drm_gem_object, it can implement this 363 * optional hook for printing additional driver specific info. 364 * 365 * drm_printf_indent() should be used in the callback passing it the 366 * indent argument. 367 * 368 * This callback is called from drm_gem_print_info(). 369 */ 370 void (*gem_print_info)(struct drm_printer *p, unsigned int indent, 371 const struct drm_gem_object *obj); 372 373 /** 374 * @gem_create_object: constructor for gem objects 375 * 376 * Hook for allocating the GEM object struct, for use by the CMA and 377 * SHMEM GEM helpers. 378 */ 379 struct drm_gem_object *(*gem_create_object)(struct drm_device *dev, 380 size_t size); 381 /** 382 * @prime_handle_to_fd: 383 * 384 * Main PRIME export function. Should be implemented with 385 * drm_gem_prime_handle_to_fd() for GEM based drivers. 386 * 387 * For an in-depth discussion see :ref:`PRIME buffer sharing 388 * documentation <prime_buffer_sharing>`. 389 */ 390 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv, 391 uint32_t handle, uint32_t flags, int *prime_fd); 392 /** 393 * @prime_fd_to_handle: 394 * 395 * Main PRIME import function. Should be implemented with 396 * drm_gem_prime_fd_to_handle() for GEM based drivers. 397 * 398 * For an in-depth discussion see :ref:`PRIME buffer sharing 399 * documentation <prime_buffer_sharing>`. 400 */ 401 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv, 402 int prime_fd, uint32_t *handle); 403 /** 404 * @gem_prime_export: 405 * 406 * Export hook for GEM drivers. Deprecated in favour of 407 * &drm_gem_object_funcs.export. 408 */ 409 struct dma_buf * (*gem_prime_export)(struct drm_gem_object *obj, 410 int flags); 411 /** 412 * @gem_prime_import: 413 * 414 * Import hook for GEM drivers. 415 * 416 * This defaults to drm_gem_prime_import() if not set. 417 */ 418 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev, 419 struct dma_buf *dma_buf); 420 421 /** 422 * @gem_prime_pin: 423 * 424 * Deprecated hook in favour of &drm_gem_object_funcs.pin. 425 */ 426 int (*gem_prime_pin)(struct drm_gem_object *obj); 427 428 /** 429 * @gem_prime_unpin: 430 * 431 * Deprecated hook in favour of &drm_gem_object_funcs.unpin. 432 */ 433 void (*gem_prime_unpin)(struct drm_gem_object *obj); 434 435 436 /** 437 * @gem_prime_get_sg_table: 438 * 439 * Deprecated hook in favour of &drm_gem_object_funcs.get_sg_table. 440 */ 441 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj); 442 443 /** 444 * @gem_prime_import_sg_table: 445 * 446 * Optional hook used by the PRIME helper functions 447 * drm_gem_prime_import() respectively drm_gem_prime_import_dev(). 448 */ 449 struct drm_gem_object *(*gem_prime_import_sg_table)( 450 struct drm_device *dev, 451 struct dma_buf_attachment *attach, 452 struct sg_table *sgt); 453 /** 454 * @gem_prime_vmap: 455 * 456 * Deprecated vmap hook for GEM drivers. Please use 457 * &drm_gem_object_funcs.vmap instead. 458 */ 459 void *(*gem_prime_vmap)(struct drm_gem_object *obj); 460 461 /** 462 * @gem_prime_vunmap: 463 * 464 * Deprecated vunmap hook for GEM drivers. Please use 465 * &drm_gem_object_funcs.vunmap instead. 466 */ 467 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr); 468 469 /** 470 * @gem_prime_mmap: 471 * 472 * mmap hook for GEM drivers, used to implement dma-buf mmap in the 473 * PRIME helpers. 474 * 475 * FIXME: There's way too much duplication going on here, and also moved 476 * to &drm_gem_object_funcs. 477 */ 478 int (*gem_prime_mmap)(struct drm_gem_object *obj, 479 struct vm_area_struct *vma); 480 481 /** 482 * @dumb_create: 483 * 484 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 485 * TTM or something else entirely) and returns the resulting buffer handle. This 486 * handle can then be wrapped up into a framebuffer modeset object. 487 * 488 * Note that userspace is not allowed to use such objects for render 489 * acceleration - drivers must create their own private ioctls for such a use 490 * case. 491 * 492 * Width, height and depth are specified in the &drm_mode_create_dumb 493 * argument. The callback needs to fill the handle, pitch and size for 494 * the created buffer. 495 * 496 * Called by the user via ioctl. 497 * 498 * Returns: 499 * 500 * Zero on success, negative errno on failure. 501 */ 502 int (*dumb_create)(struct drm_file *file_priv, 503 struct drm_device *dev, 504 struct drm_mode_create_dumb *args); 505 /** 506 * @dumb_map_offset: 507 * 508 * Allocate an offset in the drm device node's address space to be able to 509 * memory map a dumb buffer. 510 * 511 * The default implementation is drm_gem_create_mmap_offset(). GEM based 512 * drivers must not overwrite this. 513 * 514 * Called by the user via ioctl. 515 * 516 * Returns: 517 * 518 * Zero on success, negative errno on failure. 519 */ 520 int (*dumb_map_offset)(struct drm_file *file_priv, 521 struct drm_device *dev, uint32_t handle, 522 uint64_t *offset); 523 /** 524 * @dumb_destroy: 525 * 526 * This destroys the userspace handle for the given dumb backing storage buffer. 527 * Since buffer objects must be reference counted in the kernel a buffer object 528 * won't be immediately freed if a framebuffer modeset object still uses it. 529 * 530 * Called by the user via ioctl. 531 * 532 * The default implementation is drm_gem_dumb_destroy(). GEM based drivers 533 * must not overwrite this. 534 * 535 * Returns: 536 * 537 * Zero on success, negative errno on failure. 538 */ 539 int (*dumb_destroy)(struct drm_file *file_priv, 540 struct drm_device *dev, 541 uint32_t handle); 542 543 /** 544 * @gem_vm_ops: Driver private ops for this object 545 * 546 * For GEM drivers this is deprecated in favour of 547 * &drm_gem_object_funcs.vm_ops. 548 */ 549 const struct vm_operations_struct *gem_vm_ops; 550 551 /** @major: driver major number */ 552 int major; 553 /** @minor: driver minor number */ 554 int minor; 555 /** @patchlevel: driver patch level */ 556 int patchlevel; 557 /** @name: driver name */ 558 char *name; 559 /** @desc: driver description */ 560 char *desc; 561 /** @date: driver date */ 562 char *date; 563 564 /** 565 * @driver_features: 566 * Driver features, see &enum drm_driver_feature. Drivers can disable 567 * some features on a per-instance basis using 568 * &drm_device.driver_features. 569 */ 570 u32 driver_features; 571 572 /** 573 * @ioctls: 574 * 575 * Array of driver-private IOCTL description entries. See the chapter on 576 * :ref:`IOCTL support in the userland interfaces 577 * chapter<drm_driver_ioctl>` for the full details. 578 */ 579 580 const struct drm_ioctl_desc *ioctls; 581 /** @num_ioctls: Number of entries in @ioctls. */ 582 int num_ioctls; 583 584 /** 585 * @fops: 586 * 587 * File operations for the DRM device node. See the discussion in 588 * :ref:`file operations<drm_driver_fops>` for in-depth coverage and 589 * some examples. 590 */ 591 const struct file_operations *fops; 592 593 /* Everything below here is for legacy driver, never use! */ 594 /* private: */ 595 596 /* List of devices hanging off this driver with stealth attach. */ 597 struct list_head legacy_dev_list; 598 int (*firstopen) (struct drm_device *); 599 void (*preclose) (struct drm_device *, struct drm_file *file_priv); 600 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv); 601 int (*dma_quiescent) (struct drm_device *); 602 int (*context_dtor) (struct drm_device *dev, int context); 603 u32 (*get_vblank_counter)(struct drm_device *dev, unsigned int pipe); 604 int (*enable_vblank)(struct drm_device *dev, unsigned int pipe); 605 void (*disable_vblank)(struct drm_device *dev, unsigned int pipe); 606 int dev_priv_size; 607 }; 608 609 int drm_dev_init(struct drm_device *dev, 610 struct drm_driver *driver, 611 struct device *parent); 612 int devm_drm_dev_init(struct device *parent, 613 struct drm_device *dev, 614 struct drm_driver *driver); 615 616 void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver, 617 size_t size, size_t offset); 618 619 /** 620 * devm_drm_dev_alloc - Resource managed allocation of a &drm_device instance 621 * @parent: Parent device object 622 * @driver: DRM driver 623 * @type: the type of the struct which contains struct &drm_device 624 * @member: the name of the &drm_device within @type. 625 * 626 * This allocates and initialize a new DRM device. No device registration is done. 627 * Call drm_dev_register() to advertice the device to user space and register it 628 * with other core subsystems. This should be done last in the device 629 * initialization sequence to make sure userspace can't access an inconsistent 630 * state. 631 * 632 * The initial ref-count of the object is 1. Use drm_dev_get() and 633 * drm_dev_put() to take and drop further ref-counts. 634 * 635 * It is recommended that drivers embed &struct drm_device into their own device 636 * structure. 637 * 638 * Note that this manages the lifetime of the resulting &drm_device 639 * automatically using devres. The DRM device initialized with this function is 640 * automatically put on driver detach using drm_dev_put(). 641 * 642 * RETURNS: 643 * Pointer to new DRM device, or ERR_PTR on failure. 644 */ 645 #define devm_drm_dev_alloc(parent, driver, type, member) \ 646 ((type *) __devm_drm_dev_alloc(parent, driver, sizeof(type), \ 647 offsetof(type, member))) 648 649 struct drm_device *drm_dev_alloc(struct drm_driver *driver, 650 struct device *parent); 651 int drm_dev_register(struct drm_device *dev, unsigned long flags); 652 void drm_dev_unregister(struct drm_device *dev); 653 654 void drm_dev_get(struct drm_device *dev); 655 void drm_dev_put(struct drm_device *dev); 656 void drm_put_dev(struct drm_device *dev); 657 bool drm_dev_enter(struct drm_device *dev, int *idx); 658 void drm_dev_exit(int idx); 659 void drm_dev_unplug(struct drm_device *dev); 660 661 /** 662 * drm_dev_is_unplugged - is a DRM device unplugged 663 * @dev: DRM device 664 * 665 * This function can be called to check whether a hotpluggable is unplugged. 666 * Unplugging itself is singalled through drm_dev_unplug(). If a device is 667 * unplugged, these two functions guarantee that any store before calling 668 * drm_dev_unplug() is visible to callers of this function after it completes 669 * 670 * WARNING: This function fundamentally races against drm_dev_unplug(). It is 671 * recommended that drivers instead use the underlying drm_dev_enter() and 672 * drm_dev_exit() function pairs. 673 */ 674 static inline bool drm_dev_is_unplugged(struct drm_device *dev) 675 { 676 int idx; 677 678 if (drm_dev_enter(dev, &idx)) { 679 drm_dev_exit(idx); 680 return false; 681 } 682 683 return true; 684 } 685 686 /** 687 * drm_core_check_all_features - check driver feature flags mask 688 * @dev: DRM device to check 689 * @features: feature flag(s) mask 690 * 691 * This checks @dev for driver features, see &drm_driver.driver_features, 692 * &drm_device.driver_features, and the various &enum drm_driver_feature flags. 693 * 694 * Returns true if all features in the @features mask are supported, false 695 * otherwise. 696 */ 697 static inline bool drm_core_check_all_features(const struct drm_device *dev, 698 u32 features) 699 { 700 u32 supported = dev->driver->driver_features & dev->driver_features; 701 702 return features && (supported & features) == features; 703 } 704 705 /** 706 * drm_core_check_feature - check driver feature flags 707 * @dev: DRM device to check 708 * @feature: feature flag 709 * 710 * This checks @dev for driver features, see &drm_driver.driver_features, 711 * &drm_device.driver_features, and the various &enum drm_driver_feature flags. 712 * 713 * Returns true if the @feature is supported, false otherwise. 714 */ 715 static inline bool drm_core_check_feature(const struct drm_device *dev, 716 enum drm_driver_feature feature) 717 { 718 return drm_core_check_all_features(dev, feature); 719 } 720 721 /** 722 * drm_drv_uses_atomic_modeset - check if the driver implements 723 * atomic_commit() 724 * @dev: DRM device 725 * 726 * This check is useful if drivers do not have DRIVER_ATOMIC set but 727 * have atomic modesetting internally implemented. 728 */ 729 static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev) 730 { 731 return drm_core_check_feature(dev, DRIVER_ATOMIC) || 732 (dev->mode_config.funcs && dev->mode_config.funcs->atomic_commit != NULL); 733 } 734 735 736 int drm_dev_set_unique(struct drm_device *dev, const char *name); 737 738 739 #endif 740