2 * Copyright (c) 2016 Intel Corporation
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.
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
24 #include <drm/drm_plane.h>
26 #include "drm_crtc_internal.h"
31 * A plane represents an image source that can be blended with or overlayed on
32 * top of a CRTC during the scanout process. Planes take their input data from a
33 * &drm_framebuffer object. The plane itself specifies the cropping and scaling
34 * of that image, and where it is placed on the visible are of a display
35 * pipeline, represented by &drm_crtc. A plane can also have additional
36 * properties that specify how the pixels are positioned and blended, like
37 * rotation or Z-position. All these properties are stored in &drm_plane_state.
39 * To create a plane, a KMS drivers allocates and zeroes an instances of
40 * struct &drm_plane (possibly as part of a larger structure) and registers it
41 * with a call to drm_universal_plane_init().
43 * Cursor and overlay planes are optional. All drivers should provide one
44 * primary plane per CRTC to avoid surprising userspace too much. See enum
45 * &drm_plane_type for a more in-depth discussion of these special uapi-relevant
46 * plane types. Special planes are associated with their CRTC by calling
47 * drm_crtc_init_with_planes().
49 * The type of a plane is exposed in the immutable "type" enumeration property,
50 * which has one of the following values: "Overlay", "Primary", "Cursor".
53 static unsigned int drm_num_planes(struct drm_device *dev)
56 struct drm_plane *tmp;
58 drm_for_each_plane(tmp, dev) {
66 * drm_universal_plane_init - Initialize a new universal plane object
68 * @plane: plane object to init
69 * @possible_crtcs: bitmask of possible CRTCs
70 * @funcs: callbacks for the new plane
71 * @formats: array of supported formats (DRM_FORMAT\_\*)
72 * @format_count: number of elements in @formats
73 * @type: type of plane (overlay, primary, cursor)
74 * @name: printf style format string for the plane name, or NULL for default name
76 * Initializes a plane object of type @type.
79 * Zero on success, error code on failure.
81 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
82 unsigned long possible_crtcs,
83 const struct drm_plane_funcs *funcs,
84 const uint32_t *formats, unsigned int format_count,
85 enum drm_plane_type type,
86 const char *name, ...)
88 struct drm_mode_config *config = &dev->mode_config;
91 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
95 drm_modeset_lock_init(&plane->mutex);
97 plane->base.properties = &plane->properties;
100 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
102 if (!plane->format_types) {
103 DRM_DEBUG_KMS("out of memory when allocating plane\n");
104 drm_mode_object_unregister(dev, &plane->base);
112 plane->name = kvasprintf(GFP_KERNEL, name, ap);
115 plane->name = kasprintf(GFP_KERNEL, "plane-%d",
116 drm_num_planes(dev));
119 kfree(plane->format_types);
120 drm_mode_object_unregister(dev, &plane->base);
124 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
125 plane->format_count = format_count;
126 plane->possible_crtcs = possible_crtcs;
129 list_add_tail(&plane->head, &config->plane_list);
130 plane->index = config->num_total_plane++;
131 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
132 config->num_overlay_plane++;
134 drm_object_attach_property(&plane->base,
135 config->plane_type_property,
138 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
139 drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
140 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
141 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
142 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
143 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
144 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
145 drm_object_attach_property(&plane->base, config->prop_src_x, 0);
146 drm_object_attach_property(&plane->base, config->prop_src_y, 0);
147 drm_object_attach_property(&plane->base, config->prop_src_w, 0);
148 drm_object_attach_property(&plane->base, config->prop_src_h, 0);
153 EXPORT_SYMBOL(drm_universal_plane_init);
155 int drm_plane_register_all(struct drm_device *dev)
157 struct drm_plane *plane;
160 drm_for_each_plane(plane, dev) {
161 if (plane->funcs->late_register)
162 ret = plane->funcs->late_register(plane);
170 void drm_plane_unregister_all(struct drm_device *dev)
172 struct drm_plane *plane;
174 drm_for_each_plane(plane, dev) {
175 if (plane->funcs->early_unregister)
176 plane->funcs->early_unregister(plane);
181 * drm_plane_init - Initialize a legacy plane
183 * @plane: plane object to init
184 * @possible_crtcs: bitmask of possible CRTCs
185 * @funcs: callbacks for the new plane
186 * @formats: array of supported formats (DRM_FORMAT\_\*)
187 * @format_count: number of elements in @formats
188 * @is_primary: plane type (primary vs overlay)
190 * Legacy API to initialize a DRM plane.
192 * New drivers should call drm_universal_plane_init() instead.
195 * Zero on success, error code on failure.
197 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
198 unsigned long possible_crtcs,
199 const struct drm_plane_funcs *funcs,
200 const uint32_t *formats, unsigned int format_count,
203 enum drm_plane_type type;
205 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
206 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
207 formats, format_count, type, NULL);
209 EXPORT_SYMBOL(drm_plane_init);
212 * drm_plane_cleanup - Clean up the core plane usage
213 * @plane: plane to cleanup
215 * This function cleans up @plane and removes it from the DRM mode setting
216 * core. Note that the function does *not* free the plane structure itself,
217 * this is the responsibility of the caller.
219 void drm_plane_cleanup(struct drm_plane *plane)
221 struct drm_device *dev = plane->dev;
223 drm_modeset_lock_all(dev);
224 kfree(plane->format_types);
225 drm_mode_object_unregister(dev, &plane->base);
227 BUG_ON(list_empty(&plane->head));
229 /* Note that the plane_list is considered to be static; should we
230 * remove the drm_plane at runtime we would have to decrement all
231 * the indices on the drm_plane after us in the plane_list.
234 list_del(&plane->head);
235 dev->mode_config.num_total_plane--;
236 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
237 dev->mode_config.num_overlay_plane--;
238 drm_modeset_unlock_all(dev);
240 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
241 if (plane->state && plane->funcs->atomic_destroy_state)
242 plane->funcs->atomic_destroy_state(plane, plane->state);
246 memset(plane, 0, sizeof(*plane));
248 EXPORT_SYMBOL(drm_plane_cleanup);
251 * drm_plane_from_index - find the registered plane at an index
253 * @idx: index of registered plane to find for
255 * Given a plane index, return the registered plane from DRM device's
256 * list of planes with matching index.
259 drm_plane_from_index(struct drm_device *dev, int idx)
261 struct drm_plane *plane;
263 drm_for_each_plane(plane, dev)
264 if (idx == plane->index)
269 EXPORT_SYMBOL(drm_plane_from_index);
272 * drm_plane_force_disable - Forcibly disable a plane
273 * @plane: plane to disable
275 * Forces the plane to be disabled.
277 * Used when the plane's current framebuffer is destroyed,
278 * and when restoring fbdev mode.
280 void drm_plane_force_disable(struct drm_plane *plane)
287 plane->old_fb = plane->fb;
288 ret = plane->funcs->disable_plane(plane);
290 DRM_ERROR("failed to disable plane with busy fb\n");
291 plane->old_fb = NULL;
294 /* disconnect the plane from the fb and crtc: */
295 drm_framebuffer_unreference(plane->old_fb);
296 plane->old_fb = NULL;
300 EXPORT_SYMBOL(drm_plane_force_disable);
303 * drm_mode_plane_set_obj_prop - set the value of a property
304 * @plane: drm plane object to set property value for
305 * @property: property to set
306 * @value: value the property should be set to
308 * This functions sets a given property on a given plane object. This function
309 * calls the driver's ->set_property callback and changes the software state of
310 * the property if the callback succeeds.
313 * Zero on success, error code on failure.
315 int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
316 struct drm_property *property,
320 struct drm_mode_object *obj = &plane->base;
322 if (plane->funcs->set_property)
323 ret = plane->funcs->set_property(plane, property, value);
325 drm_object_property_set_value(obj, property, value);
329 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
331 int drm_mode_getplane_res(struct drm_device *dev, void *data,
332 struct drm_file *file_priv)
334 struct drm_mode_get_plane_res *plane_resp = data;
335 struct drm_mode_config *config;
336 struct drm_plane *plane;
337 uint32_t __user *plane_ptr;
341 if (!drm_core_check_feature(dev, DRIVER_MODESET))
344 config = &dev->mode_config;
346 if (file_priv->universal_planes)
347 num_planes = config->num_total_plane;
349 num_planes = config->num_overlay_plane;
352 * This ioctl is called twice, once to determine how much space is
353 * needed, and the 2nd time to fill it.
356 (plane_resp->count_planes >= num_planes)) {
357 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
359 /* Plane lists are invariant, no locking needed. */
360 drm_for_each_plane(plane, dev) {
362 * Unless userspace set the 'universal planes'
363 * capability bit, only advertise overlays.
365 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
366 !file_priv->universal_planes)
369 if (put_user(plane->base.id, plane_ptr + copied))
374 plane_resp->count_planes = num_planes;
379 int drm_mode_getplane(struct drm_device *dev, void *data,
380 struct drm_file *file_priv)
382 struct drm_mode_get_plane *plane_resp = data;
383 struct drm_plane *plane;
384 uint32_t __user *format_ptr;
386 if (!drm_core_check_feature(dev, DRIVER_MODESET))
389 plane = drm_plane_find(dev, plane_resp->plane_id);
393 drm_modeset_lock(&plane->mutex, NULL);
395 plane_resp->crtc_id = plane->crtc->base.id;
397 plane_resp->crtc_id = 0;
400 plane_resp->fb_id = plane->fb->base.id;
402 plane_resp->fb_id = 0;
403 drm_modeset_unlock(&plane->mutex);
405 plane_resp->plane_id = plane->base.id;
406 plane_resp->possible_crtcs = plane->possible_crtcs;
407 plane_resp->gamma_size = 0;
410 * This ioctl is called twice, once to determine how much space is
411 * needed, and the 2nd time to fill it.
413 if (plane->format_count &&
414 (plane_resp->count_format_types >= plane->format_count)) {
415 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
416 if (copy_to_user(format_ptr,
418 sizeof(uint32_t) * plane->format_count)) {
422 plane_resp->count_format_types = plane->format_count;
427 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format)
431 for (i = 0; i < plane->format_count; i++) {
432 if (format == plane->format_types[i])
440 * setplane_internal - setplane handler for internal callers
442 * Note that we assume an extra reference has already been taken on fb. If the
443 * update fails, this reference will be dropped before return; if it succeeds,
444 * the previous framebuffer (if any) will be unreferenced instead.
446 * src_{x,y,w,h} are provided in 16.16 fixed point format
448 static int __setplane_internal(struct drm_plane *plane,
449 struct drm_crtc *crtc,
450 struct drm_framebuffer *fb,
451 int32_t crtc_x, int32_t crtc_y,
452 uint32_t crtc_w, uint32_t crtc_h,
453 /* src_{x,y,w,h} values are 16.16 fixed point */
454 uint32_t src_x, uint32_t src_y,
455 uint32_t src_w, uint32_t src_h)
459 /* No fb means shut it down */
461 plane->old_fb = plane->fb;
462 ret = plane->funcs->disable_plane(plane);
467 plane->old_fb = NULL;
472 /* Check whether this plane is usable on this CRTC */
473 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
474 DRM_DEBUG_KMS("Invalid crtc for plane\n");
479 /* Check whether this plane supports the fb pixel format. */
480 ret = drm_plane_check_pixel_format(plane, fb->pixel_format);
482 char *format_name = drm_get_format_name(fb->pixel_format);
483 DRM_DEBUG_KMS("Invalid pixel format %s\n", format_name);
488 /* Give drivers some help against integer overflows */
489 if (crtc_w > INT_MAX ||
490 crtc_x > INT_MAX - (int32_t) crtc_w ||
492 crtc_y > INT_MAX - (int32_t) crtc_h) {
493 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
494 crtc_w, crtc_h, crtc_x, crtc_y);
499 ret = drm_framebuffer_check_src_coords(src_x, src_y, src_w, src_h, fb);
503 plane->old_fb = plane->fb;
504 ret = plane->funcs->update_plane(plane, crtc, fb,
505 crtc_x, crtc_y, crtc_w, crtc_h,
506 src_x, src_y, src_w, src_h);
512 plane->old_fb = NULL;
517 drm_framebuffer_unreference(fb);
519 drm_framebuffer_unreference(plane->old_fb);
520 plane->old_fb = NULL;
525 static int setplane_internal(struct drm_plane *plane,
526 struct drm_crtc *crtc,
527 struct drm_framebuffer *fb,
528 int32_t crtc_x, int32_t crtc_y,
529 uint32_t crtc_w, uint32_t crtc_h,
530 /* src_{x,y,w,h} values are 16.16 fixed point */
531 uint32_t src_x, uint32_t src_y,
532 uint32_t src_w, uint32_t src_h)
536 drm_modeset_lock_all(plane->dev);
537 ret = __setplane_internal(plane, crtc, fb,
538 crtc_x, crtc_y, crtc_w, crtc_h,
539 src_x, src_y, src_w, src_h);
540 drm_modeset_unlock_all(plane->dev);
545 int drm_mode_setplane(struct drm_device *dev, void *data,
546 struct drm_file *file_priv)
548 struct drm_mode_set_plane *plane_req = data;
549 struct drm_plane *plane;
550 struct drm_crtc *crtc = NULL;
551 struct drm_framebuffer *fb = NULL;
553 if (!drm_core_check_feature(dev, DRIVER_MODESET))
557 * First, find the plane, crtc, and fb objects. If not available,
558 * we don't bother to call the driver.
560 plane = drm_plane_find(dev, plane_req->plane_id);
562 DRM_DEBUG_KMS("Unknown plane ID %d\n",
563 plane_req->plane_id);
567 if (plane_req->fb_id) {
568 fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
570 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
575 crtc = drm_crtc_find(dev, plane_req->crtc_id);
577 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
584 * setplane_internal will take care of deref'ing either the old or new
585 * framebuffer depending on success.
587 return setplane_internal(plane, crtc, fb,
588 plane_req->crtc_x, plane_req->crtc_y,
589 plane_req->crtc_w, plane_req->crtc_h,
590 plane_req->src_x, plane_req->src_y,
591 plane_req->src_w, plane_req->src_h);
594 static int drm_mode_cursor_universal(struct drm_crtc *crtc,
595 struct drm_mode_cursor2 *req,
596 struct drm_file *file_priv)
598 struct drm_device *dev = crtc->dev;
599 struct drm_framebuffer *fb = NULL;
600 struct drm_mode_fb_cmd2 fbreq = {
602 .height = req->height,
603 .pixel_format = DRM_FORMAT_ARGB8888,
604 .pitches = { req->width * 4 },
605 .handles = { req->handle },
607 int32_t crtc_x, crtc_y;
608 uint32_t crtc_w = 0, crtc_h = 0;
609 uint32_t src_w = 0, src_h = 0;
612 BUG_ON(!crtc->cursor);
613 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL);
616 * Obtain fb we'll be using (either new or existing) and take an extra
617 * reference to it if fb != null. setplane will take care of dropping
618 * the reference if the plane update fails.
620 if (req->flags & DRM_MODE_CURSOR_BO) {
622 fb = drm_internal_framebuffer_create(dev, &fbreq, file_priv);
624 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
627 fb->hot_x = req->hot_x;
628 fb->hot_y = req->hot_y;
633 fb = crtc->cursor->fb;
635 drm_framebuffer_reference(fb);
638 if (req->flags & DRM_MODE_CURSOR_MOVE) {
642 crtc_x = crtc->cursor_x;
643 crtc_y = crtc->cursor_y;
649 src_w = fb->width << 16;
650 src_h = fb->height << 16;
654 * setplane_internal will take care of deref'ing either the old or new
655 * framebuffer depending on success.
657 ret = __setplane_internal(crtc->cursor, crtc, fb,
658 crtc_x, crtc_y, crtc_w, crtc_h,
661 /* Update successful; save new cursor position, if necessary */
662 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
663 crtc->cursor_x = req->x;
664 crtc->cursor_y = req->y;
670 static int drm_mode_cursor_common(struct drm_device *dev,
671 struct drm_mode_cursor2 *req,
672 struct drm_file *file_priv)
674 struct drm_crtc *crtc;
677 if (!drm_core_check_feature(dev, DRIVER_MODESET))
680 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
683 crtc = drm_crtc_find(dev, req->crtc_id);
685 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
690 * If this crtc has a universal cursor plane, call that plane's update
691 * handler rather than using legacy cursor handlers.
693 drm_modeset_lock_crtc(crtc, crtc->cursor);
695 ret = drm_mode_cursor_universal(crtc, req, file_priv);
699 if (req->flags & DRM_MODE_CURSOR_BO) {
700 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
704 /* Turns off the cursor if handle is 0 */
705 if (crtc->funcs->cursor_set2)
706 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
707 req->width, req->height, req->hot_x, req->hot_y);
709 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
710 req->width, req->height);
713 if (req->flags & DRM_MODE_CURSOR_MOVE) {
714 if (crtc->funcs->cursor_move) {
715 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
722 drm_modeset_unlock_crtc(crtc);
729 int drm_mode_cursor_ioctl(struct drm_device *dev,
730 void *data, struct drm_file *file_priv)
732 struct drm_mode_cursor *req = data;
733 struct drm_mode_cursor2 new_req;
735 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
736 new_req.hot_x = new_req.hot_y = 0;
738 return drm_mode_cursor_common(dev, &new_req, file_priv);
742 * Set the cursor configuration based on user request. This implements the 2nd
743 * version of the cursor ioctl, which allows userspace to additionally specify
744 * the hotspot of the pointer.
746 int drm_mode_cursor2_ioctl(struct drm_device *dev,
747 void *data, struct drm_file *file_priv)
749 struct drm_mode_cursor2 *req = data;
751 return drm_mode_cursor_common(dev, req, file_priv);
754 int drm_mode_page_flip_ioctl(struct drm_device *dev,
755 void *data, struct drm_file *file_priv)
757 struct drm_mode_crtc_page_flip_target *page_flip = data;
758 struct drm_crtc *crtc;
759 struct drm_framebuffer *fb = NULL;
760 struct drm_pending_vblank_event *e = NULL;
761 u32 target_vblank = page_flip->sequence;
764 if (!drm_core_check_feature(dev, DRIVER_MODESET))
767 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS)
770 if (page_flip->sequence != 0 && !(page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET))
773 /* Only one of the DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags
776 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) == DRM_MODE_PAGE_FLIP_TARGET)
779 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
782 crtc = drm_crtc_find(dev, page_flip->crtc_id);
786 if (crtc->funcs->page_flip_target) {
790 r = drm_crtc_vblank_get(crtc);
794 current_vblank = drm_crtc_vblank_count(crtc);
796 switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) {
797 case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE:
798 if ((int)(target_vblank - current_vblank) > 1) {
799 DRM_DEBUG("Invalid absolute flip target %u, "
800 "must be <= %u\n", target_vblank,
802 drm_crtc_vblank_put(crtc);
806 case DRM_MODE_PAGE_FLIP_TARGET_RELATIVE:
807 if (target_vblank != 0 && target_vblank != 1) {
808 DRM_DEBUG("Invalid relative flip target %u, "
809 "must be 0 or 1\n", target_vblank);
810 drm_crtc_vblank_put(crtc);
813 target_vblank += current_vblank;
816 target_vblank = current_vblank +
817 !(page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC);
820 } else if (crtc->funcs->page_flip == NULL ||
821 (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET)) {
825 drm_modeset_lock_crtc(crtc, crtc->primary);
826 if (crtc->primary->fb == NULL) {
827 /* The framebuffer is currently unbound, presumably
828 * due to a hotplug event, that userspace has not
835 fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
842 const struct drm_plane_state *state = crtc->primary->state;
844 ret = drm_framebuffer_check_src_coords(state->src_x,
850 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb);
855 if (crtc->primary->fb->pixel_format != fb->pixel_format) {
856 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
861 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
862 e = kzalloc(sizeof *e, GFP_KERNEL);
867 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
868 e->event.base.length = sizeof(e->event);
869 e->event.user_data = page_flip->user_data;
870 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
877 crtc->primary->old_fb = crtc->primary->fb;
878 if (crtc->funcs->page_flip_target)
879 ret = crtc->funcs->page_flip_target(crtc, fb, e,
883 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags);
885 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT)
886 drm_event_cancel_free(dev, &e->base);
887 /* Keep the old fb, don't unref it. */
888 crtc->primary->old_fb = NULL;
890 crtc->primary->fb = fb;
891 /* Unref only the old framebuffer. */
896 if (ret && crtc->funcs->page_flip_target)
897 drm_crtc_vblank_put(crtc);
899 drm_framebuffer_unreference(fb);
900 if (crtc->primary->old_fb)
901 drm_framebuffer_unreference(crtc->primary->old_fb);
902 crtc->primary->old_fb = NULL;
903 drm_modeset_unlock_crtc(crtc);