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23 #ifndef __DRM_PLANE_H__
24 #define __DRM_PLANE_H__
26 #include <linux/list.h>
27 #include <linux/ctype.h>
28 #include <drm/drm_mode_object.h>
29 #include <drm/drm_color_mgmt.h>
33 struct drm_modeset_acquire_ctx;
36 * struct drm_plane_state - mutable plane state
37 * @plane: backpointer to the plane
38 * @crtc_w: width of visible portion of plane on crtc
39 * @crtc_h: height of visible portion of plane on crtc
40 * @src_x: left position of visible portion of plane within
42 * @src_y: upper position of visible portion of plane within
44 * @src_w: width of visible portion of plane (in 16.16)
45 * @src_h: height of visible portion of plane (in 16.16)
46 * @rotation: rotation of the plane
47 * @zpos: priority of the given plane on crtc (optional)
48 * Note that multiple active planes on the same crtc can have an identical
49 * zpos value. The rule to solving the conflict is to compare the plane
50 * object IDs; the plane with a higher ID must be stacked on top of a
51 * plane with a lower ID.
52 * @normalized_zpos: normalized value of zpos: unique, range from 0 to N-1
53 * where N is the number of active planes for given crtc. Note that
54 * the driver must call drm_atomic_normalize_zpos() to update this before
56 * @src: clipped source coordinates of the plane (in 16.16)
57 * @dst: clipped destination coordinates of the plane
58 * @state: backpointer to global drm_atomic_state
60 struct drm_plane_state {
61 struct drm_plane *plane;
66 * Currently bound CRTC, NULL if disabled. Do not this write directly,
67 * use drm_atomic_set_crtc_for_plane()
69 struct drm_crtc *crtc;
74 * Currently bound framebuffer. Do not write this directly, use
75 * drm_atomic_set_fb_for_plane()
77 struct drm_framebuffer *fb;
82 * Optional fence to wait for before scanning out @fb. Do not write this
83 * directly, use drm_atomic_set_fence_for_plane()
85 struct dma_fence *fence;
90 * Left position of visible portion of plane on crtc, signed dest
91 * location allows it to be partially off screen.
98 * Upper position of visible portion of plane on crtc, signed dest
99 * location allows it to be partially off screen.
103 uint32_t crtc_w, crtc_h;
105 /* Source values are 16.16 fixed point */
106 uint32_t src_x, src_y;
107 uint32_t src_h, src_w;
110 unsigned int rotation;
114 unsigned int normalized_zpos;
119 * Color encoding for non RGB formats
121 enum drm_color_encoding color_encoding;
126 * Color range for non RGB formats
128 enum drm_color_range color_range;
130 /* Clipped coordinates */
131 struct drm_rect src, dst;
136 * Visibility of the plane. This can be false even if fb!=NULL and
137 * crtc!=NULL, due to clipping.
142 * @commit: Tracks the pending commit to prevent use-after-free conditions,
143 * and for async plane updates.
147 struct drm_crtc_commit *commit;
149 struct drm_atomic_state *state;
152 static inline struct drm_rect
153 drm_plane_state_src(const struct drm_plane_state *state)
155 struct drm_rect src = {
158 .x2 = state->src_x + state->src_w,
159 .y2 = state->src_y + state->src_h,
164 static inline struct drm_rect
165 drm_plane_state_dest(const struct drm_plane_state *state)
167 struct drm_rect dest = {
170 .x2 = state->crtc_x + state->crtc_w,
171 .y2 = state->crtc_y + state->crtc_h,
177 * struct drm_plane_funcs - driver plane control functions
179 struct drm_plane_funcs {
183 * This is the legacy entry point to enable and configure the plane for
184 * the given CRTC and framebuffer. It is never called to disable the
185 * plane, i.e. the passed-in crtc and fb paramters are never NULL.
187 * The source rectangle in frame buffer memory coordinates is given by
188 * the src_x, src_y, src_w and src_h parameters (as 16.16 fixed point
189 * values). Devices that don't support subpixel plane coordinates can
190 * ignore the fractional part.
192 * The destination rectangle in CRTC coordinates is given by the
193 * crtc_x, crtc_y, crtc_w and crtc_h parameters (as integer values).
194 * Devices scale the source rectangle to the destination rectangle. If
195 * scaling is not supported, and the source rectangle size doesn't match
196 * the destination rectangle size, the driver must return a
197 * -<errorname>EINVAL</errorname> error.
199 * Drivers implementing atomic modeset should use
200 * drm_atomic_helper_update_plane() to implement this hook.
204 * 0 on success or a negative error code on failure.
206 int (*update_plane)(struct drm_plane *plane,
207 struct drm_crtc *crtc, struct drm_framebuffer *fb,
208 int crtc_x, int crtc_y,
209 unsigned int crtc_w, unsigned int crtc_h,
210 uint32_t src_x, uint32_t src_y,
211 uint32_t src_w, uint32_t src_h,
212 struct drm_modeset_acquire_ctx *ctx);
217 * This is the legacy entry point to disable the plane. The DRM core
218 * calls this method in response to a DRM_IOCTL_MODE_SETPLANE IOCTL call
219 * with the frame buffer ID set to 0. Disabled planes must not be
220 * processed by the CRTC.
222 * Drivers implementing atomic modeset should use
223 * drm_atomic_helper_disable_plane() to implement this hook.
227 * 0 on success or a negative error code on failure.
229 int (*disable_plane)(struct drm_plane *plane,
230 struct drm_modeset_acquire_ctx *ctx);
235 * Clean up plane resources. This is only called at driver unload time
236 * through drm_mode_config_cleanup() since a plane cannot be hotplugged
239 void (*destroy)(struct drm_plane *plane);
244 * Reset plane hardware and software state to off. This function isn't
245 * called by the core directly, only through drm_mode_config_reset().
246 * It's not a helper hook only for historical reasons.
248 * Atomic drivers can use drm_atomic_helper_plane_reset() to reset
249 * atomic state using this hook.
251 void (*reset)(struct drm_plane *plane);
256 * This is the legacy entry point to update a property attached to the
259 * This callback is optional if the driver does not support any legacy
260 * driver-private properties. For atomic drivers it is not used because
261 * property handling is done entirely in the DRM core.
265 * 0 on success or a negative error code on failure.
267 int (*set_property)(struct drm_plane *plane,
268 struct drm_property *property, uint64_t val);
271 * @atomic_duplicate_state:
273 * Duplicate the current atomic state for this plane and return it.
274 * The core and helpers guarantee that any atomic state duplicated with
275 * this hook and still owned by the caller (i.e. not transferred to the
276 * driver by calling &drm_mode_config_funcs.atomic_commit) will be
277 * cleaned up by calling the @atomic_destroy_state hook in this
280 * Atomic drivers which don't subclass &struct drm_plane_state should use
281 * drm_atomic_helper_plane_duplicate_state(). Drivers that subclass the
282 * state structure to extend it with driver-private state should use
283 * __drm_atomic_helper_plane_duplicate_state() to make sure shared state is
284 * duplicated in a consistent fashion across drivers.
286 * It is an error to call this hook before &drm_plane.state has been
287 * initialized correctly.
291 * If the duplicate state references refcounted resources this hook must
292 * acquire a reference for each of them. The driver must release these
293 * references again in @atomic_destroy_state.
297 * Duplicated atomic state or NULL when the allocation failed.
299 struct drm_plane_state *(*atomic_duplicate_state)(struct drm_plane *plane);
302 * @atomic_destroy_state:
304 * Destroy a state duplicated with @atomic_duplicate_state and release
305 * or unreference all resources it references
307 void (*atomic_destroy_state)(struct drm_plane *plane,
308 struct drm_plane_state *state);
311 * @atomic_set_property:
313 * Decode a driver-private property value and store the decoded value
314 * into the passed-in state structure. Since the atomic core decodes all
315 * standardized properties (even for extensions beyond the core set of
316 * properties which might not be implemented by all drivers) this
317 * requires drivers to subclass the state structure.
319 * Such driver-private properties should really only be implemented for
320 * truly hardware/vendor specific state. Instead it is preferred to
321 * standardize atomic extension and decode the properties used to expose
322 * such an extension in the core.
324 * Do not call this function directly, use
325 * drm_atomic_plane_set_property() instead.
327 * This callback is optional if the driver does not support any
328 * driver-private atomic properties.
332 * This function is called in the state assembly phase of atomic
333 * modesets, which can be aborted for any reason (including on
334 * userspace's request to just check whether a configuration would be
335 * possible). Drivers MUST NOT touch any persistent state (hardware or
336 * software) or data structures except the passed in @state parameter.
338 * Also since userspace controls in which order properties are set this
339 * function must not do any input validation (since the state update is
340 * incomplete and hence likely inconsistent). Instead any such input
341 * validation must be done in the various atomic_check callbacks.
345 * 0 if the property has been found, -EINVAL if the property isn't
346 * implemented by the driver (which shouldn't ever happen, the core only
347 * asks for properties attached to this plane). No other validation is
348 * allowed by the driver. The core already checks that the property
349 * value is within the range (integer, valid enum value, ...) the driver
350 * set when registering the property.
352 int (*atomic_set_property)(struct drm_plane *plane,
353 struct drm_plane_state *state,
354 struct drm_property *property,
358 * @atomic_get_property:
360 * Reads out the decoded driver-private property. This is used to
361 * implement the GETPLANE IOCTL.
363 * Do not call this function directly, use
364 * drm_atomic_plane_get_property() instead.
366 * This callback is optional if the driver does not support any
367 * driver-private atomic properties.
371 * 0 on success, -EINVAL if the property isn't implemented by the
372 * driver (which should never happen, the core only asks for
373 * properties attached to this plane).
375 int (*atomic_get_property)(struct drm_plane *plane,
376 const struct drm_plane_state *state,
377 struct drm_property *property,
382 * This optional hook can be used to register additional userspace
383 * interfaces attached to the plane like debugfs interfaces.
384 * It is called late in the driver load sequence from drm_dev_register().
385 * Everything added from this callback should be unregistered in
386 * the early_unregister callback.
390 * 0 on success, or a negative error code on failure.
392 int (*late_register)(struct drm_plane *plane);
397 * This optional hook should be used to unregister the additional
398 * userspace interfaces attached to the plane from
399 * @late_register. It is called from drm_dev_unregister(),
400 * early in the driver unload sequence to disable userspace access
401 * before data structures are torndown.
403 void (*early_unregister)(struct drm_plane *plane);
406 * @atomic_print_state:
408 * If driver subclasses &struct drm_plane_state, it should implement
409 * this optional hook for printing additional driver specific state.
411 * Do not call this directly, use drm_atomic_plane_print_state()
414 void (*atomic_print_state)(struct drm_printer *p,
415 const struct drm_plane_state *state);
418 * @format_mod_supported:
420 * This optional hook is used for the DRM to determine if the given
421 * format/modifier combination is valid for the plane. This allows the
422 * DRM to generate the correct format bitmask (which formats apply to
427 * True if the given modifier is valid for that format on the plane.
430 bool (*format_mod_supported)(struct drm_plane *plane, uint32_t format,
435 * enum drm_plane_type - uapi plane type enumeration
437 * For historical reasons not all planes are made the same. This enumeration is
438 * used to tell the different types of planes apart to implement the different
439 * uapi semantics for them. For userspace which is universal plane aware and
440 * which is using that atomic IOCTL there's no difference between these planes
441 * (beyong what the driver and hardware can support of course).
443 * For compatibility with legacy userspace, only overlay planes are made
444 * available to userspace by default. Userspace clients may set the
445 * DRM_CLIENT_CAP_UNIVERSAL_PLANES client capability bit to indicate that they
446 * wish to receive a universal plane list containing all plane types. See also
447 * drm_for_each_legacy_plane().
449 * WARNING: The values of this enum is UABI since they're exposed in the "type"
452 enum drm_plane_type {
454 * @DRM_PLANE_TYPE_OVERLAY:
456 * Overlay planes represent all non-primary, non-cursor planes. Some
457 * drivers refer to these types of planes as "sprites" internally.
459 DRM_PLANE_TYPE_OVERLAY,
462 * @DRM_PLANE_TYPE_PRIMARY:
464 * Primary planes represent a "main" plane for a CRTC. Primary planes
465 * are the planes operated upon by CRTC modesetting and flipping
466 * operations described in the &drm_crtc_funcs.page_flip and
467 * &drm_crtc_funcs.set_config hooks.
469 DRM_PLANE_TYPE_PRIMARY,
472 * @DRM_PLANE_TYPE_CURSOR:
474 * Cursor planes represent a "cursor" plane for a CRTC. Cursor planes
475 * are the planes operated upon by the DRM_IOCTL_MODE_CURSOR and
476 * DRM_IOCTL_MODE_CURSOR2 IOCTLs.
478 DRM_PLANE_TYPE_CURSOR,
483 * struct drm_plane - central DRM plane control structure
484 * @dev: DRM device this plane belongs to
485 * @head: for list management
486 * @name: human readable name, can be overwritten by the driver
487 * @base: base mode object
488 * @possible_crtcs: pipes this plane can be bound to
489 * @format_types: array of formats supported by this plane
490 * @format_count: number of formats supported
491 * @format_default: driver hasn't supplied supported formats for the plane
492 * @modifiers: array of modifiers supported by this plane
493 * @modifier_count: number of modifiers supported
494 * @old_fb: Temporary tracking of the old fb while a modeset is ongoing. Used by
495 * drm_mode_set_config_internal() to implement correct refcounting.
496 * @funcs: helper functions
497 * @properties: property tracking for this plane
498 * @type: type of plane (overlay, primary, cursor)
499 * @zpos_property: zpos property for this plane
500 * @rotation_property: rotation property for this plane
501 * @helper_private: mid-layer private data
504 struct drm_device *dev;
505 struct list_head head;
512 * Protects modeset plane state, together with the &drm_crtc.mutex of
513 * CRTC this plane is linked to (when active, getting activated or
516 * For atomic drivers specifically this protects @state.
518 struct drm_modeset_lock mutex;
520 struct drm_mode_object base;
522 uint32_t possible_crtcs;
523 uint32_t *format_types;
524 unsigned int format_count;
528 unsigned int modifier_count;
531 * @crtc: Currently bound CRTC, only really meaningful for non-atomic
532 * drivers. Atomic drivers should instead check &drm_plane_state.crtc.
534 struct drm_crtc *crtc;
537 * @fb: Currently bound framebuffer, only really meaningful for
538 * non-atomic drivers. Atomic drivers should instead check
539 * &drm_plane_state.fb.
541 struct drm_framebuffer *fb;
543 struct drm_framebuffer *old_fb;
545 const struct drm_plane_funcs *funcs;
547 struct drm_object_properties properties;
549 enum drm_plane_type type;
552 * @index: Position inside the mode_config.list, can be used as an array
553 * index. It is invariant over the lifetime of the plane.
557 const struct drm_plane_helper_funcs *helper_private;
562 * Current atomic state for this plane.
564 * This is protected by @mutex. Note that nonblocking atomic commits
565 * access the current plane state without taking locks. Either by going
566 * through the &struct drm_atomic_state pointers, see
567 * for_each_oldnew_plane_in_state(), for_each_old_plane_in_state() and
568 * for_each_new_plane_in_state(). Or through careful ordering of atomic
569 * commit operations as implemented in the atomic helpers, see
570 * &struct drm_crtc_commit.
572 struct drm_plane_state *state;
574 struct drm_property *zpos_property;
575 struct drm_property *rotation_property;
578 * @color_encoding_property:
580 * Optional "COLOR_ENCODING" enum property for specifying
581 * color encoding for non RGB formats.
582 * See drm_plane_create_color_properties().
584 struct drm_property *color_encoding_property;
586 * @color_range_property:
588 * Optional "COLOR_RANGE" enum property for specifying
589 * color range for non RGB formats.
590 * See drm_plane_create_color_properties().
592 struct drm_property *color_range_property;
595 #define obj_to_plane(x) container_of(x, struct drm_plane, base)
598 int drm_universal_plane_init(struct drm_device *dev,
599 struct drm_plane *plane,
600 uint32_t possible_crtcs,
601 const struct drm_plane_funcs *funcs,
602 const uint32_t *formats,
603 unsigned int format_count,
604 const uint64_t *format_modifiers,
605 enum drm_plane_type type,
606 const char *name, ...);
607 int drm_plane_init(struct drm_device *dev,
608 struct drm_plane *plane,
609 uint32_t possible_crtcs,
610 const struct drm_plane_funcs *funcs,
611 const uint32_t *formats, unsigned int format_count,
613 void drm_plane_cleanup(struct drm_plane *plane);
616 * drm_plane_index - find the index of a registered plane
617 * @plane: plane to find index for
619 * Given a registered plane, return the index of that plane within a DRM
620 * device's list of planes.
622 static inline unsigned int drm_plane_index(struct drm_plane *plane)
626 struct drm_plane * drm_plane_from_index(struct drm_device *dev, int idx);
627 void drm_plane_force_disable(struct drm_plane *plane);
629 int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
630 struct drm_property *property,
634 * drm_plane_find - find a &drm_plane
636 * @file_priv: drm file to check for lease against.
639 * Returns the plane with @id, NULL if it doesn't exist. Simple wrapper around
640 * drm_mode_object_find().
642 static inline struct drm_plane *drm_plane_find(struct drm_device *dev,
643 struct drm_file *file_priv,
646 struct drm_mode_object *mo;
647 mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_PLANE);
648 return mo ? obj_to_plane(mo) : NULL;
652 * drm_for_each_plane_mask - iterate over planes specified by bitmask
653 * @plane: the loop cursor
654 * @dev: the DRM device
655 * @plane_mask: bitmask of plane indices
657 * Iterate over all planes specified by bitmask.
659 #define drm_for_each_plane_mask(plane, dev, plane_mask) \
660 list_for_each_entry((plane), &(dev)->mode_config.plane_list, head) \
661 for_each_if ((plane_mask) & (1 << drm_plane_index(plane)))
664 * drm_for_each_legacy_plane - iterate over all planes for legacy userspace
665 * @plane: the loop cursor
666 * @dev: the DRM device
668 * Iterate over all legacy planes of @dev, excluding primary and cursor planes.
669 * This is useful for implementing userspace apis when userspace is not
670 * universal plane aware. See also &enum drm_plane_type.
672 #define drm_for_each_legacy_plane(plane, dev) \
673 list_for_each_entry(plane, &(dev)->mode_config.plane_list, head) \
674 for_each_if (plane->type == DRM_PLANE_TYPE_OVERLAY)
677 * drm_for_each_plane - iterate over all planes
678 * @plane: the loop cursor
679 * @dev: the DRM device
681 * Iterate over all planes of @dev, include primary and cursor planes.
683 #define drm_for_each_plane(plane, dev) \
684 list_for_each_entry(plane, &(dev)->mode_config.plane_list, head)