1 /* 2 * Copyright (c) 2016 Intel Corporation 3 * 4 * Permission to use, copy, modify, distribute, and sell this software and its 5 * documentation for any purpose is hereby granted without fee, provided that 6 * the above copyright notice appear in all copies and that both that copyright 7 * notice and this permission notice appear in supporting documentation, and 8 * that the name of the copyright holders not be used in advertising or 9 * publicity pertaining to distribution of the software without specific, 10 * written prior permission. The copyright holders make no representations 11 * about the suitability of this software for any purpose. It is provided "as 12 * is" without express or implied warranty. 13 * 14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 20 * OF THIS SOFTWARE. 21 */ 22 23 #ifndef __DRM_PLANE_H__ 24 #define __DRM_PLANE_H__ 25 26 #include <linux/list.h> 27 #include <linux/ctype.h> 28 #include <drm/drm_mode_object.h> 29 30 struct drm_crtc; 31 struct drm_printer; 32 struct drm_modeset_acquire_ctx; 33 34 /** 35 * struct drm_plane_state - mutable plane state 36 * @plane: backpointer to the plane 37 * @crtc_w: width of visible portion of plane on crtc 38 * @crtc_h: height of visible portion of plane on crtc 39 * @src_x: left position of visible portion of plane within 40 * plane (in 16.16) 41 * @src_y: upper position of visible portion of plane within 42 * plane (in 16.16) 43 * @src_w: width of visible portion of plane (in 16.16) 44 * @src_h: height of visible portion of plane (in 16.16) 45 * @rotation: rotation of the plane 46 * @zpos: priority of the given plane on crtc (optional) 47 * Note that multiple active planes on the same crtc can have an identical 48 * zpos value. The rule to solving the conflict is to compare the plane 49 * object IDs; the plane with a higher ID must be stacked on top of a 50 * plane with a lower ID. 51 * @normalized_zpos: normalized value of zpos: unique, range from 0 to N-1 52 * where N is the number of active planes for given crtc. Note that 53 * the driver must call drm_atomic_normalize_zpos() to update this before 54 * it can be trusted. 55 * @src: clipped source coordinates of the plane (in 16.16) 56 * @dst: clipped destination coordinates of the plane 57 * @state: backpointer to global drm_atomic_state 58 */ 59 struct drm_plane_state { 60 struct drm_plane *plane; 61 62 /** 63 * @crtc: 64 * 65 * Currently bound CRTC, NULL if disabled. Do not this write directly, 66 * use drm_atomic_set_crtc_for_plane() 67 */ 68 struct drm_crtc *crtc; 69 70 /** 71 * @fb: 72 * 73 * Currently bound framebuffer. Do not write this directly, use 74 * drm_atomic_set_fb_for_plane() 75 */ 76 struct drm_framebuffer *fb; 77 78 /** 79 * @fence: 80 * 81 * Optional fence to wait for before scanning out @fb. Do not write this 82 * directly, use drm_atomic_set_fence_for_plane() 83 */ 84 struct dma_fence *fence; 85 86 /** 87 * @crtc_x: 88 * 89 * Left position of visible portion of plane on crtc, signed dest 90 * location allows it to be partially off screen. 91 */ 92 93 int32_t crtc_x; 94 /** 95 * @crtc_y: 96 * 97 * Upper position of visible portion of plane on crtc, signed dest 98 * location allows it to be partially off screen. 99 */ 100 int32_t crtc_y; 101 102 uint32_t crtc_w, crtc_h; 103 104 /* Source values are 16.16 fixed point */ 105 uint32_t src_x, src_y; 106 uint32_t src_h, src_w; 107 108 /* Plane rotation */ 109 unsigned int rotation; 110 111 /* Plane zpos */ 112 unsigned int zpos; 113 unsigned int normalized_zpos; 114 115 /* Clipped coordinates */ 116 struct drm_rect src, dst; 117 118 /** 119 * @visible: 120 * 121 * Visibility of the plane. This can be false even if fb!=NULL and 122 * crtc!=NULL, due to clipping. 123 */ 124 bool visible; 125 126 struct drm_atomic_state *state; 127 }; 128 129 static inline struct drm_rect 130 drm_plane_state_src(const struct drm_plane_state *state) 131 { 132 struct drm_rect src = { 133 .x1 = state->src_x, 134 .y1 = state->src_y, 135 .x2 = state->src_x + state->src_w, 136 .y2 = state->src_y + state->src_h, 137 }; 138 return src; 139 } 140 141 static inline struct drm_rect 142 drm_plane_state_dest(const struct drm_plane_state *state) 143 { 144 struct drm_rect dest = { 145 .x1 = state->crtc_x, 146 .y1 = state->crtc_y, 147 .x2 = state->crtc_x + state->crtc_w, 148 .y2 = state->crtc_y + state->crtc_h, 149 }; 150 return dest; 151 } 152 153 /** 154 * struct drm_plane_funcs - driver plane control functions 155 */ 156 struct drm_plane_funcs { 157 /** 158 * @update_plane: 159 * 160 * This is the legacy entry point to enable and configure the plane for 161 * the given CRTC and framebuffer. It is never called to disable the 162 * plane, i.e. the passed-in crtc and fb paramters are never NULL. 163 * 164 * The source rectangle in frame buffer memory coordinates is given by 165 * the src_x, src_y, src_w and src_h parameters (as 16.16 fixed point 166 * values). Devices that don't support subpixel plane coordinates can 167 * ignore the fractional part. 168 * 169 * The destination rectangle in CRTC coordinates is given by the 170 * crtc_x, crtc_y, crtc_w and crtc_h parameters (as integer values). 171 * Devices scale the source rectangle to the destination rectangle. If 172 * scaling is not supported, and the source rectangle size doesn't match 173 * the destination rectangle size, the driver must return a 174 * -<errorname>EINVAL</errorname> error. 175 * 176 * Drivers implementing atomic modeset should use 177 * drm_atomic_helper_update_plane() to implement this hook. 178 * 179 * RETURNS: 180 * 181 * 0 on success or a negative error code on failure. 182 */ 183 int (*update_plane)(struct drm_plane *plane, 184 struct drm_crtc *crtc, struct drm_framebuffer *fb, 185 int crtc_x, int crtc_y, 186 unsigned int crtc_w, unsigned int crtc_h, 187 uint32_t src_x, uint32_t src_y, 188 uint32_t src_w, uint32_t src_h, 189 struct drm_modeset_acquire_ctx *ctx); 190 191 /** 192 * @disable_plane: 193 * 194 * This is the legacy entry point to disable the plane. The DRM core 195 * calls this method in response to a DRM_IOCTL_MODE_SETPLANE IOCTL call 196 * with the frame buffer ID set to 0. Disabled planes must not be 197 * processed by the CRTC. 198 * 199 * Drivers implementing atomic modeset should use 200 * drm_atomic_helper_disable_plane() to implement this hook. 201 * 202 * RETURNS: 203 * 204 * 0 on success or a negative error code on failure. 205 */ 206 int (*disable_plane)(struct drm_plane *plane, 207 struct drm_modeset_acquire_ctx *ctx); 208 209 /** 210 * @destroy: 211 * 212 * Clean up plane resources. This is only called at driver unload time 213 * through drm_mode_config_cleanup() since a plane cannot be hotplugged 214 * in DRM. 215 */ 216 void (*destroy)(struct drm_plane *plane); 217 218 /** 219 * @reset: 220 * 221 * Reset plane hardware and software state to off. This function isn't 222 * called by the core directly, only through drm_mode_config_reset(). 223 * It's not a helper hook only for historical reasons. 224 * 225 * Atomic drivers can use drm_atomic_helper_plane_reset() to reset 226 * atomic state using this hook. 227 */ 228 void (*reset)(struct drm_plane *plane); 229 230 /** 231 * @set_property: 232 * 233 * This is the legacy entry point to update a property attached to the 234 * plane. 235 * 236 * This callback is optional if the driver does not support any legacy 237 * driver-private properties. For atomic drivers it is not used because 238 * property handling is done entirely in the DRM core. 239 * 240 * RETURNS: 241 * 242 * 0 on success or a negative error code on failure. 243 */ 244 int (*set_property)(struct drm_plane *plane, 245 struct drm_property *property, uint64_t val); 246 247 /** 248 * @atomic_duplicate_state: 249 * 250 * Duplicate the current atomic state for this plane and return it. 251 * The core and helpers guarantee that any atomic state duplicated with 252 * this hook and still owned by the caller (i.e. not transferred to the 253 * driver by calling &drm_mode_config_funcs.atomic_commit) will be 254 * cleaned up by calling the @atomic_destroy_state hook in this 255 * structure. 256 * 257 * Atomic drivers which don't subclass &struct drm_plane_state should use 258 * drm_atomic_helper_plane_duplicate_state(). Drivers that subclass the 259 * state structure to extend it with driver-private state should use 260 * __drm_atomic_helper_plane_duplicate_state() to make sure shared state is 261 * duplicated in a consistent fashion across drivers. 262 * 263 * It is an error to call this hook before &drm_plane.state has been 264 * initialized correctly. 265 * 266 * NOTE: 267 * 268 * If the duplicate state references refcounted resources this hook must 269 * acquire a reference for each of them. The driver must release these 270 * references again in @atomic_destroy_state. 271 * 272 * RETURNS: 273 * 274 * Duplicated atomic state or NULL when the allocation failed. 275 */ 276 struct drm_plane_state *(*atomic_duplicate_state)(struct drm_plane *plane); 277 278 /** 279 * @atomic_destroy_state: 280 * 281 * Destroy a state duplicated with @atomic_duplicate_state and release 282 * or unreference all resources it references 283 */ 284 void (*atomic_destroy_state)(struct drm_plane *plane, 285 struct drm_plane_state *state); 286 287 /** 288 * @atomic_set_property: 289 * 290 * Decode a driver-private property value and store the decoded value 291 * into the passed-in state structure. Since the atomic core decodes all 292 * standardized properties (even for extensions beyond the core set of 293 * properties which might not be implemented by all drivers) this 294 * requires drivers to subclass the state structure. 295 * 296 * Such driver-private properties should really only be implemented for 297 * truly hardware/vendor specific state. Instead it is preferred to 298 * standardize atomic extension and decode the properties used to expose 299 * such an extension in the core. 300 * 301 * Do not call this function directly, use 302 * drm_atomic_plane_set_property() instead. 303 * 304 * This callback is optional if the driver does not support any 305 * driver-private atomic properties. 306 * 307 * NOTE: 308 * 309 * This function is called in the state assembly phase of atomic 310 * modesets, which can be aborted for any reason (including on 311 * userspace's request to just check whether a configuration would be 312 * possible). Drivers MUST NOT touch any persistent state (hardware or 313 * software) or data structures except the passed in @state parameter. 314 * 315 * Also since userspace controls in which order properties are set this 316 * function must not do any input validation (since the state update is 317 * incomplete and hence likely inconsistent). Instead any such input 318 * validation must be done in the various atomic_check callbacks. 319 * 320 * RETURNS: 321 * 322 * 0 if the property has been found, -EINVAL if the property isn't 323 * implemented by the driver (which shouldn't ever happen, the core only 324 * asks for properties attached to this plane). No other validation is 325 * allowed by the driver. The core already checks that the property 326 * value is within the range (integer, valid enum value, ...) the driver 327 * set when registering the property. 328 */ 329 int (*atomic_set_property)(struct drm_plane *plane, 330 struct drm_plane_state *state, 331 struct drm_property *property, 332 uint64_t val); 333 334 /** 335 * @atomic_get_property: 336 * 337 * Reads out the decoded driver-private property. This is used to 338 * implement the GETPLANE IOCTL. 339 * 340 * Do not call this function directly, use 341 * drm_atomic_plane_get_property() instead. 342 * 343 * This callback is optional if the driver does not support any 344 * driver-private atomic properties. 345 * 346 * RETURNS: 347 * 348 * 0 on success, -EINVAL if the property isn't implemented by the 349 * driver (which should never happen, the core only asks for 350 * properties attached to this plane). 351 */ 352 int (*atomic_get_property)(struct drm_plane *plane, 353 const struct drm_plane_state *state, 354 struct drm_property *property, 355 uint64_t *val); 356 /** 357 * @late_register: 358 * 359 * This optional hook can be used to register additional userspace 360 * interfaces attached to the plane like debugfs interfaces. 361 * It is called late in the driver load sequence from drm_dev_register(). 362 * Everything added from this callback should be unregistered in 363 * the early_unregister callback. 364 * 365 * Returns: 366 * 367 * 0 on success, or a negative error code on failure. 368 */ 369 int (*late_register)(struct drm_plane *plane); 370 371 /** 372 * @early_unregister: 373 * 374 * This optional hook should be used to unregister the additional 375 * userspace interfaces attached to the plane from 376 * @late_register. It is called from drm_dev_unregister(), 377 * early in the driver unload sequence to disable userspace access 378 * before data structures are torndown. 379 */ 380 void (*early_unregister)(struct drm_plane *plane); 381 382 /** 383 * @atomic_print_state: 384 * 385 * If driver subclasses &struct drm_plane_state, it should implement 386 * this optional hook for printing additional driver specific state. 387 * 388 * Do not call this directly, use drm_atomic_plane_print_state() 389 * instead. 390 */ 391 void (*atomic_print_state)(struct drm_printer *p, 392 const struct drm_plane_state *state); 393 394 /** 395 * @format_mod_supported: 396 * 397 * This optional hook is used for the DRM to determine if the given 398 * format/modifier combination is valid for the plane. This allows the 399 * DRM to generate the correct format bitmask (which formats apply to 400 * which modifier). 401 * 402 * Returns: 403 * 404 * True if the given modifier is valid for that format on the plane. 405 * False otherwise. 406 */ 407 bool (*format_mod_supported)(struct drm_plane *plane, uint32_t format, 408 uint64_t modifier); 409 }; 410 411 /** 412 * enum drm_plane_type - uapi plane type enumeration 413 * 414 * For historical reasons not all planes are made the same. This enumeration is 415 * used to tell the different types of planes apart to implement the different 416 * uapi semantics for them. For userspace which is universal plane aware and 417 * which is using that atomic IOCTL there's no difference between these planes 418 * (beyong what the driver and hardware can support of course). 419 * 420 * For compatibility with legacy userspace, only overlay planes are made 421 * available to userspace by default. Userspace clients may set the 422 * DRM_CLIENT_CAP_UNIVERSAL_PLANES client capability bit to indicate that they 423 * wish to receive a universal plane list containing all plane types. See also 424 * drm_for_each_legacy_plane(). 425 * 426 * WARNING: The values of this enum is UABI since they're exposed in the "type" 427 * property. 428 */ 429 enum drm_plane_type { 430 /** 431 * @DRM_PLANE_TYPE_OVERLAY: 432 * 433 * Overlay planes represent all non-primary, non-cursor planes. Some 434 * drivers refer to these types of planes as "sprites" internally. 435 */ 436 DRM_PLANE_TYPE_OVERLAY, 437 438 /** 439 * @DRM_PLANE_TYPE_PRIMARY: 440 * 441 * Primary planes represent a "main" plane for a CRTC. Primary planes 442 * are the planes operated upon by CRTC modesetting and flipping 443 * operations described in the &drm_crtc_funcs.page_flip and 444 * &drm_crtc_funcs.set_config hooks. 445 */ 446 DRM_PLANE_TYPE_PRIMARY, 447 448 /** 449 * @DRM_PLANE_TYPE_CURSOR: 450 * 451 * Cursor planes represent a "cursor" plane for a CRTC. Cursor planes 452 * are the planes operated upon by the DRM_IOCTL_MODE_CURSOR and 453 * DRM_IOCTL_MODE_CURSOR2 IOCTLs. 454 */ 455 DRM_PLANE_TYPE_CURSOR, 456 }; 457 458 459 /** 460 * struct drm_plane - central DRM plane control structure 461 * @dev: DRM device this plane belongs to 462 * @head: for list management 463 * @name: human readable name, can be overwritten by the driver 464 * @base: base mode object 465 * @possible_crtcs: pipes this plane can be bound to 466 * @format_types: array of formats supported by this plane 467 * @format_count: number of formats supported 468 * @format_default: driver hasn't supplied supported formats for the plane 469 * @crtc: currently bound CRTC 470 * @fb: currently bound fb 471 * @old_fb: Temporary tracking of the old fb while a modeset is ongoing. Used by 472 * drm_mode_set_config_internal() to implement correct refcounting. 473 * @funcs: helper functions 474 * @properties: property tracking for this plane 475 * @type: type of plane (overlay, primary, cursor) 476 * @zpos_property: zpos property for this plane 477 * @rotation_property: rotation property for this plane 478 * @helper_private: mid-layer private data 479 */ 480 struct drm_plane { 481 struct drm_device *dev; 482 struct list_head head; 483 484 char *name; 485 486 /** 487 * @mutex: 488 * 489 * Protects modeset plane state, together with the &drm_crtc.mutex of 490 * CRTC this plane is linked to (when active, getting activated or 491 * getting disabled). 492 * 493 * For atomic drivers specifically this protects @state. 494 */ 495 struct drm_modeset_lock mutex; 496 497 struct drm_mode_object base; 498 499 uint32_t possible_crtcs; 500 uint32_t *format_types; 501 unsigned int format_count; 502 bool format_default; 503 504 uint64_t *modifiers; 505 unsigned int modifier_count; 506 507 struct drm_crtc *crtc; 508 struct drm_framebuffer *fb; 509 510 struct drm_framebuffer *old_fb; 511 512 const struct drm_plane_funcs *funcs; 513 514 struct drm_object_properties properties; 515 516 enum drm_plane_type type; 517 518 /** 519 * @index: Position inside the mode_config.list, can be used as an array 520 * index. It is invariant over the lifetime of the plane. 521 */ 522 unsigned index; 523 524 const struct drm_plane_helper_funcs *helper_private; 525 526 /** 527 * @state: 528 * 529 * Current atomic state for this plane. 530 * 531 * This is protected by @mutex. Note that nonblocking atomic commits 532 * access the current plane state without taking locks. Either by going 533 * through the &struct drm_atomic_state pointers, see 534 * for_each_plane_in_state(), for_each_oldnew_plane_in_state(), 535 * for_each_old_plane_in_state() and for_each_new_plane_in_state(). Or 536 * through careful ordering of atomic commit operations as implemented 537 * in the atomic helpers, see &struct drm_crtc_commit. 538 */ 539 struct drm_plane_state *state; 540 541 struct drm_property *zpos_property; 542 struct drm_property *rotation_property; 543 }; 544 545 #define obj_to_plane(x) container_of(x, struct drm_plane, base) 546 547 __printf(9, 10) 548 int drm_universal_plane_init(struct drm_device *dev, 549 struct drm_plane *plane, 550 uint32_t possible_crtcs, 551 const struct drm_plane_funcs *funcs, 552 const uint32_t *formats, 553 unsigned int format_count, 554 const uint64_t *format_modifiers, 555 enum drm_plane_type type, 556 const char *name, ...); 557 int drm_plane_init(struct drm_device *dev, 558 struct drm_plane *plane, 559 uint32_t possible_crtcs, 560 const struct drm_plane_funcs *funcs, 561 const uint32_t *formats, unsigned int format_count, 562 bool is_primary); 563 void drm_plane_cleanup(struct drm_plane *plane); 564 565 /** 566 * drm_plane_index - find the index of a registered plane 567 * @plane: plane to find index for 568 * 569 * Given a registered plane, return the index of that plane within a DRM 570 * device's list of planes. 571 */ 572 static inline unsigned int drm_plane_index(struct drm_plane *plane) 573 { 574 return plane->index; 575 } 576 struct drm_plane * drm_plane_from_index(struct drm_device *dev, int idx); 577 void drm_plane_force_disable(struct drm_plane *plane); 578 579 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 580 struct drm_property *property, 581 uint64_t value); 582 583 /** 584 * drm_plane_find - find a &drm_plane 585 * @dev: DRM device 586 * @id: plane id 587 * 588 * Returns the plane with @id, NULL if it doesn't exist. Simple wrapper around 589 * drm_mode_object_find(). 590 */ 591 static inline struct drm_plane *drm_plane_find(struct drm_device *dev, 592 uint32_t id) 593 { 594 struct drm_mode_object *mo; 595 mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_PLANE); 596 return mo ? obj_to_plane(mo) : NULL; 597 } 598 599 /** 600 * drm_for_each_plane_mask - iterate over planes specified by bitmask 601 * @plane: the loop cursor 602 * @dev: the DRM device 603 * @plane_mask: bitmask of plane indices 604 * 605 * Iterate over all planes specified by bitmask. 606 */ 607 #define drm_for_each_plane_mask(plane, dev, plane_mask) \ 608 list_for_each_entry((plane), &(dev)->mode_config.plane_list, head) \ 609 for_each_if ((plane_mask) & (1 << drm_plane_index(plane))) 610 611 /** 612 * drm_for_each_legacy_plane - iterate over all planes for legacy userspace 613 * @plane: the loop cursor 614 * @dev: the DRM device 615 * 616 * Iterate over all legacy planes of @dev, excluding primary and cursor planes. 617 * This is useful for implementing userspace apis when userspace is not 618 * universal plane aware. See also &enum drm_plane_type. 619 */ 620 #define drm_for_each_legacy_plane(plane, dev) \ 621 list_for_each_entry(plane, &(dev)->mode_config.plane_list, head) \ 622 for_each_if (plane->type == DRM_PLANE_TYPE_OVERLAY) 623 624 /** 625 * drm_for_each_plane - iterate over all planes 626 * @plane: the loop cursor 627 * @dev: the DRM device 628 * 629 * Iterate over all planes of @dev, include primary and cursor planes. 630 */ 631 #define drm_for_each_plane(plane, dev) \ 632 list_for_each_entry(plane, &(dev)->mode_config.plane_list, head) 633 634 635 #endif 636