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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#include <linux/slab.h>
24#include <linux/uaccess.h>
25
26#include <drm/drm_plane.h>
27#include <drm/drm_drv.h>
28#include <drm/drm_print.h>
29#include <drm/drm_framebuffer.h>
30#include <drm/drm_file.h>
31#include <drm/drm_crtc.h>
32#include <drm/drm_fourcc.h>
33#include <drm/drm_managed.h>
34#include <drm/drm_vblank.h>
35
36#include "drm_crtc_internal.h"
37
38/**
39 * DOC: overview
40 *
41 * A plane represents an image source that can be blended with or overlayed on
42 * top of a CRTC during the scanout process. Planes take their input data from a
43 * &drm_framebuffer object. The plane itself specifies the cropping and scaling
44 * of that image, and where it is placed on the visible area of a display
45 * pipeline, represented by &drm_crtc. A plane can also have additional
46 * properties that specify how the pixels are positioned and blended, like
47 * rotation or Z-position. All these properties are stored in &drm_plane_state.
48 *
49 * To create a plane, a KMS drivers allocates and zeroes an instances of
50 * &struct drm_plane (possibly as part of a larger structure) and registers it
51 * with a call to drm_universal_plane_init().
52 *
53 * Each plane has a type, see enum drm_plane_type. A plane can be compatible
54 * with multiple CRTCs, see &drm_plane.possible_crtcs.
55 *
56 * Each CRTC must have a unique primary plane userspace can attach to enable
57 * the CRTC. In other words, userspace must be able to attach a different
58 * primary plane to each CRTC at the same time. Primary planes can still be
59 * compatible with multiple CRTCs. There must be exactly as many primary planes
60 * as there are CRTCs.
61 *
62 * Legacy uAPI doesn't expose the primary and cursor planes directly. DRM core
63 * relies on the driver to set the primary and optionally the cursor plane used
64 * for legacy IOCTLs. This is done by calling drm_crtc_init_with_planes(). All
65 * drivers must provide one primary plane per CRTC to avoid surprising legacy
66 * userspace too much.
67 */
68
69/**
70 * DOC: standard plane properties
71 *
72 * DRM planes have a few standardized properties:
73 *
74 * type:
75 * Immutable property describing the type of the plane.
76 *
77 * For user-space which has enabled the &DRM_CLIENT_CAP_ATOMIC capability,
78 * the plane type is just a hint and is mostly superseded by atomic
79 * test-only commits. The type hint can still be used to come up more
80 * easily with a plane configuration accepted by the driver.
81 *
82 * The value of this property can be one of the following:
83 *
84 * "Primary":
85 * To light up a CRTC, attaching a primary plane is the most likely to
86 * work if it covers the whole CRTC and doesn't have scaling or
87 * cropping set up.
88 *
89 * Drivers may support more features for the primary plane, user-space
90 * can find out with test-only atomic commits.
91 *
92 * Some primary planes are implicitly used by the kernel in the legacy
93 * IOCTLs &DRM_IOCTL_MODE_SETCRTC and &DRM_IOCTL_MODE_PAGE_FLIP.
94 * Therefore user-space must not mix explicit usage of any primary
95 * plane (e.g. through an atomic commit) with these legacy IOCTLs.
96 *
97 * "Cursor":
98 * To enable this plane, using a framebuffer configured without scaling
99 * or cropping and with the following properties is the most likely to
100 * work:
101 *
102 * - If the driver provides the capabilities &DRM_CAP_CURSOR_WIDTH and
103 * &DRM_CAP_CURSOR_HEIGHT, create the framebuffer with this size.
104 * Otherwise, create a framebuffer with the size 64x64.
105 * - If the driver doesn't support modifiers, create a framebuffer with
106 * a linear layout. Otherwise, use the IN_FORMATS plane property.
107 *
108 * Drivers may support more features for the cursor plane, user-space
109 * can find out with test-only atomic commits.
110 *
111 * Some cursor planes are implicitly used by the kernel in the legacy
112 * IOCTLs &DRM_IOCTL_MODE_CURSOR and &DRM_IOCTL_MODE_CURSOR2.
113 * Therefore user-space must not mix explicit usage of any cursor
114 * plane (e.g. through an atomic commit) with these legacy IOCTLs.
115 *
116 * Some drivers may support cursors even if no cursor plane is exposed.
117 * In this case, the legacy cursor IOCTLs can be used to configure the
118 * cursor.
119 *
120 * "Overlay":
121 * Neither primary nor cursor.
122 *
123 * Overlay planes are the only planes exposed when the
124 * &DRM_CLIENT_CAP_UNIVERSAL_PLANES capability is disabled.
125 *
126 * IN_FORMATS:
127 * Blob property which contains the set of buffer format and modifier
128 * pairs supported by this plane. The blob is a struct
129 * drm_format_modifier_blob. Without this property the plane doesn't
130 * support buffers with modifiers. Userspace cannot change this property.
131 *
132 * Note that userspace can check the &DRM_CAP_ADDFB2_MODIFIERS driver
133 * capability for general modifier support. If this flag is set then every
134 * plane will have the IN_FORMATS property, even when it only supports
135 * DRM_FORMAT_MOD_LINEAR. Before linux kernel release v5.1 there have been
136 * various bugs in this area with inconsistencies between the capability
137 * flag and per-plane properties.
138 */
139
140static unsigned int drm_num_planes(struct drm_device *dev)
141{
142 unsigned int num = 0;
143 struct drm_plane *tmp;
144
145 drm_for_each_plane(tmp, dev) {
146 num++;
147 }
148
149 return num;
150}
151
152static inline u32 *
153formats_ptr(struct drm_format_modifier_blob *blob)
154{
155 return (u32 *)(((char *)blob) + blob->formats_offset);
156}
157
158static inline struct drm_format_modifier *
159modifiers_ptr(struct drm_format_modifier_blob *blob)
160{
161 return (struct drm_format_modifier *)(((char *)blob) + blob->modifiers_offset);
162}
163
164static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane)
165{
166 const struct drm_mode_config *config = &dev->mode_config;
167 struct drm_property_blob *blob;
168 struct drm_format_modifier *mod;
169 size_t blob_size, formats_size, modifiers_size;
170 struct drm_format_modifier_blob *blob_data;
171 unsigned int i, j;
172
173 formats_size = sizeof(__u32) * plane->format_count;
174 if (WARN_ON(!formats_size)) {
175 /* 0 formats are never expected */
176 return 0;
177 }
178
179 modifiers_size =
180 sizeof(struct drm_format_modifier) * plane->modifier_count;
181
182 blob_size = sizeof(struct drm_format_modifier_blob);
183 /* Modifiers offset is a pointer to a struct with a 64 bit field so it
184 * should be naturally aligned to 8B.
185 */
186 BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8);
187 blob_size += ALIGN(formats_size, 8);
188 blob_size += modifiers_size;
189
190 blob = drm_property_create_blob(dev, blob_size, NULL);
191 if (IS_ERR(blob))
192 return -1;
193
194 blob_data = blob->data;
195 blob_data->version = FORMAT_BLOB_CURRENT;
196 blob_data->count_formats = plane->format_count;
197 blob_data->formats_offset = sizeof(struct drm_format_modifier_blob);
198 blob_data->count_modifiers = plane->modifier_count;
199
200 blob_data->modifiers_offset =
201 ALIGN(blob_data->formats_offset + formats_size, 8);
202
203 memcpy(formats_ptr(blob_data), plane->format_types, formats_size);
204
205 /* If we can't determine support, just bail */
206 if (!plane->funcs->format_mod_supported)
207 goto done;
208
209 mod = modifiers_ptr(blob_data);
210 for (i = 0; i < plane->modifier_count; i++) {
211 for (j = 0; j < plane->format_count; j++) {
212 if (plane->funcs->format_mod_supported(plane,
213 plane->format_types[j],
214 plane->modifiers[i])) {
215
216 mod->formats |= 1ULL << j;
217 }
218 }
219
220 mod->modifier = plane->modifiers[i];
221 mod->offset = 0;
222 mod->pad = 0;
223 mod++;
224 }
225
226done:
227 drm_object_attach_property(&plane->base, config->modifiers_property,
228 blob->base.id);
229
230 return 0;
231}
232
233__printf(9, 0)
234static int __drm_universal_plane_init(struct drm_device *dev,
235 struct drm_plane *plane,
236 uint32_t possible_crtcs,
237 const struct drm_plane_funcs *funcs,
238 const uint32_t *formats,
239 unsigned int format_count,
240 const uint64_t *format_modifiers,
241 enum drm_plane_type type,
242 const char *name, va_list ap)
243{
244 struct drm_mode_config *config = &dev->mode_config;
245 unsigned int format_modifier_count = 0;
246 int ret;
247
248 /* plane index is used with 32bit bitmasks */
249 if (WARN_ON(config->num_total_plane >= 32))
250 return -EINVAL;
251
252 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
253 (!funcs->atomic_destroy_state ||
254 !funcs->atomic_duplicate_state));
255
256 ret = drm_mode_object_add(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
257 if (ret)
258 return ret;
259
260 drm_modeset_lock_init(&plane->mutex);
261
262 plane->base.properties = &plane->properties;
263 plane->dev = dev;
264 plane->funcs = funcs;
265 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
266 GFP_KERNEL);
267 if (!plane->format_types) {
268 DRM_DEBUG_KMS("out of memory when allocating plane\n");
269 drm_mode_object_unregister(dev, &plane->base);
270 return -ENOMEM;
271 }
272
273 /*
274 * First driver to need more than 64 formats needs to fix this. Each
275 * format is encoded as a bit and the current code only supports a u64.
276 */
277 if (WARN_ON(format_count > 64))
278 return -EINVAL;
279
280 if (format_modifiers) {
281 const uint64_t *temp_modifiers = format_modifiers;
282
283 while (*temp_modifiers++ != DRM_FORMAT_MOD_INVALID)
284 format_modifier_count++;
285 }
286
287 /* autoset the cap and check for consistency across all planes */
288 if (format_modifier_count) {
289 drm_WARN_ON(dev, !config->allow_fb_modifiers &&
290 !list_empty(&config->plane_list));
291 config->allow_fb_modifiers = true;
292 } else {
293 drm_WARN_ON(dev, config->allow_fb_modifiers);
294 }
295
296 plane->modifier_count = format_modifier_count;
297 plane->modifiers = kmalloc_array(format_modifier_count,
298 sizeof(format_modifiers[0]),
299 GFP_KERNEL);
300
301 if (format_modifier_count && !plane->modifiers) {
302 DRM_DEBUG_KMS("out of memory when allocating plane\n");
303 kfree(plane->format_types);
304 drm_mode_object_unregister(dev, &plane->base);
305 return -ENOMEM;
306 }
307
308 if (name) {
309 plane->name = kvasprintf(GFP_KERNEL, name, ap);
310 } else {
311 plane->name = kasprintf(GFP_KERNEL, "plane-%d",
312 drm_num_planes(dev));
313 }
314 if (!plane->name) {
315 kfree(plane->format_types);
316 kfree(plane->modifiers);
317 drm_mode_object_unregister(dev, &plane->base);
318 return -ENOMEM;
319 }
320
321 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
322 plane->format_count = format_count;
323 memcpy(plane->modifiers, format_modifiers,
324 format_modifier_count * sizeof(format_modifiers[0]));
325 plane->possible_crtcs = possible_crtcs;
326 plane->type = type;
327
328 list_add_tail(&plane->head, &config->plane_list);
329 plane->index = config->num_total_plane++;
330
331 drm_object_attach_property(&plane->base,
332 config->plane_type_property,
333 plane->type);
334
335 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
336 drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
337 drm_object_attach_property(&plane->base, config->prop_in_fence_fd, -1);
338 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
339 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
340 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
341 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
342 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
343 drm_object_attach_property(&plane->base, config->prop_src_x, 0);
344 drm_object_attach_property(&plane->base, config->prop_src_y, 0);
345 drm_object_attach_property(&plane->base, config->prop_src_w, 0);
346 drm_object_attach_property(&plane->base, config->prop_src_h, 0);
347 }
348
349 if (config->allow_fb_modifiers)
350 create_in_format_blob(dev, plane);
351
352 return 0;
353}
354
355/**
356 * drm_universal_plane_init - Initialize a new universal plane object
357 * @dev: DRM device
358 * @plane: plane object to init
359 * @possible_crtcs: bitmask of possible CRTCs
360 * @funcs: callbacks for the new plane
361 * @formats: array of supported formats (DRM_FORMAT\_\*)
362 * @format_count: number of elements in @formats
363 * @format_modifiers: array of struct drm_format modifiers terminated by
364 * DRM_FORMAT_MOD_INVALID
365 * @type: type of plane (overlay, primary, cursor)
366 * @name: printf style format string for the plane name, or NULL for default name
367 *
368 * Initializes a plane object of type @type. The &drm_plane_funcs.destroy hook
369 * should call drm_plane_cleanup() and kfree() the plane structure. The plane
370 * structure should not be allocated with devm_kzalloc().
371 *
372 * Note: consider using drmm_universal_plane_alloc() instead of
373 * drm_universal_plane_init() to let the DRM managed resource infrastructure
374 * take care of cleanup and deallocation.
375 *
376 * Drivers supporting modifiers must set @format_modifiers on all their planes,
377 * even those that only support DRM_FORMAT_MOD_LINEAR.
378 *
379 * Returns:
380 * Zero on success, error code on failure.
381 */
382int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
383 uint32_t possible_crtcs,
384 const struct drm_plane_funcs *funcs,
385 const uint32_t *formats, unsigned int format_count,
386 const uint64_t *format_modifiers,
387 enum drm_plane_type type,
388 const char *name, ...)
389{
390 va_list ap;
391 int ret;
392
393 WARN_ON(!funcs->destroy);
394
395 va_start(ap, name);
396 ret = __drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
397 formats, format_count, format_modifiers,
398 type, name, ap);
399 va_end(ap);
400 return ret;
401}
402EXPORT_SYMBOL(drm_universal_plane_init);
403
404static void drmm_universal_plane_alloc_release(struct drm_device *dev, void *ptr)
405{
406 struct drm_plane *plane = ptr;
407
408 if (WARN_ON(!plane->dev))
409 return;
410
411 drm_plane_cleanup(plane);
412}
413
414void *__drmm_universal_plane_alloc(struct drm_device *dev, size_t size,
415 size_t offset, uint32_t possible_crtcs,
416 const struct drm_plane_funcs *funcs,
417 const uint32_t *formats, unsigned int format_count,
418 const uint64_t *format_modifiers,
419 enum drm_plane_type type,
420 const char *name, ...)
421{
422 void *container;
423 struct drm_plane *plane;
424 va_list ap;
425 int ret;
426
427 if (WARN_ON(!funcs || funcs->destroy))
428 return ERR_PTR(-EINVAL);
429
430 container = drmm_kzalloc(dev, size, GFP_KERNEL);
431 if (!container)
432 return ERR_PTR(-ENOMEM);
433
434 plane = container + offset;
435
436 va_start(ap, name);
437 ret = __drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
438 formats, format_count, format_modifiers,
439 type, name, ap);
440 va_end(ap);
441 if (ret)
442 return ERR_PTR(ret);
443
444 ret = drmm_add_action_or_reset(dev, drmm_universal_plane_alloc_release,
445 plane);
446 if (ret)
447 return ERR_PTR(ret);
448
449 return container;
450}
451EXPORT_SYMBOL(__drmm_universal_plane_alloc);
452
453int drm_plane_register_all(struct drm_device *dev)
454{
455 unsigned int num_planes = 0;
456 unsigned int num_zpos = 0;
457 struct drm_plane *plane;
458 int ret = 0;
459
460 drm_for_each_plane(plane, dev) {
461 if (plane->funcs->late_register)
462 ret = plane->funcs->late_register(plane);
463 if (ret)
464 return ret;
465
466 if (plane->zpos_property)
467 num_zpos++;
468 num_planes++;
469 }
470
471 drm_WARN(dev, num_zpos && num_planes != num_zpos,
472 "Mixing planes with and without zpos property is invalid\n");
473
474 return 0;
475}
476
477void drm_plane_unregister_all(struct drm_device *dev)
478{
479 struct drm_plane *plane;
480
481 drm_for_each_plane(plane, dev) {
482 if (plane->funcs->early_unregister)
483 plane->funcs->early_unregister(plane);
484 }
485}
486
487/**
488 * drm_plane_init - Initialize a legacy plane
489 * @dev: DRM device
490 * @plane: plane object to init
491 * @possible_crtcs: bitmask of possible CRTCs
492 * @funcs: callbacks for the new plane
493 * @formats: array of supported formats (DRM_FORMAT\_\*)
494 * @format_count: number of elements in @formats
495 * @is_primary: plane type (primary vs overlay)
496 *
497 * Legacy API to initialize a DRM plane.
498 *
499 * New drivers should call drm_universal_plane_init() instead.
500 *
501 * Returns:
502 * Zero on success, error code on failure.
503 */
504int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
505 uint32_t possible_crtcs,
506 const struct drm_plane_funcs *funcs,
507 const uint32_t *formats, unsigned int format_count,
508 bool is_primary)
509{
510 enum drm_plane_type type;
511
512 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
513 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
514 formats, format_count,
515 NULL, type, NULL);
516}
517EXPORT_SYMBOL(drm_plane_init);
518
519/**
520 * drm_plane_cleanup - Clean up the core plane usage
521 * @plane: plane to cleanup
522 *
523 * This function cleans up @plane and removes it from the DRM mode setting
524 * core. Note that the function does *not* free the plane structure itself,
525 * this is the responsibility of the caller.
526 */
527void drm_plane_cleanup(struct drm_plane *plane)
528{
529 struct drm_device *dev = plane->dev;
530
531 drm_modeset_lock_fini(&plane->mutex);
532
533 kfree(plane->format_types);
534 kfree(plane->modifiers);
535 drm_mode_object_unregister(dev, &plane->base);
536
537 BUG_ON(list_empty(&plane->head));
538
539 /* Note that the plane_list is considered to be static; should we
540 * remove the drm_plane at runtime we would have to decrement all
541 * the indices on the drm_plane after us in the plane_list.
542 */
543
544 list_del(&plane->head);
545 dev->mode_config.num_total_plane--;
546
547 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
548 if (plane->state && plane->funcs->atomic_destroy_state)
549 plane->funcs->atomic_destroy_state(plane, plane->state);
550
551 kfree(plane->name);
552
553 memset(plane, 0, sizeof(*plane));
554}
555EXPORT_SYMBOL(drm_plane_cleanup);
556
557/**
558 * drm_plane_from_index - find the registered plane at an index
559 * @dev: DRM device
560 * @idx: index of registered plane to find for
561 *
562 * Given a plane index, return the registered plane from DRM device's
563 * list of planes with matching index. This is the inverse of drm_plane_index().
564 */
565struct drm_plane *
566drm_plane_from_index(struct drm_device *dev, int idx)
567{
568 struct drm_plane *plane;
569
570 drm_for_each_plane(plane, dev)
571 if (idx == plane->index)
572 return plane;
573
574 return NULL;
575}
576EXPORT_SYMBOL(drm_plane_from_index);
577
578/**
579 * drm_plane_force_disable - Forcibly disable a plane
580 * @plane: plane to disable
581 *
582 * Forces the plane to be disabled.
583 *
584 * Used when the plane's current framebuffer is destroyed,
585 * and when restoring fbdev mode.
586 *
587 * Note that this function is not suitable for atomic drivers, since it doesn't
588 * wire through the lock acquisition context properly and hence can't handle
589 * retries or driver private locks. You probably want to use
590 * drm_atomic_helper_disable_plane() or
591 * drm_atomic_helper_disable_planes_on_crtc() instead.
592 */
593void drm_plane_force_disable(struct drm_plane *plane)
594{
595 int ret;
596
597 if (!plane->fb)
598 return;
599
600 WARN_ON(drm_drv_uses_atomic_modeset(plane->dev));
601
602 plane->old_fb = plane->fb;
603 ret = plane->funcs->disable_plane(plane, NULL);
604 if (ret) {
605 DRM_ERROR("failed to disable plane with busy fb\n");
606 plane->old_fb = NULL;
607 return;
608 }
609 /* disconnect the plane from the fb and crtc: */
610 drm_framebuffer_put(plane->old_fb);
611 plane->old_fb = NULL;
612 plane->fb = NULL;
613 plane->crtc = NULL;
614}
615EXPORT_SYMBOL(drm_plane_force_disable);
616
617/**
618 * drm_mode_plane_set_obj_prop - set the value of a property
619 * @plane: drm plane object to set property value for
620 * @property: property to set
621 * @value: value the property should be set to
622 *
623 * This functions sets a given property on a given plane object. This function
624 * calls the driver's ->set_property callback and changes the software state of
625 * the property if the callback succeeds.
626 *
627 * Returns:
628 * Zero on success, error code on failure.
629 */
630int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
631 struct drm_property *property,
632 uint64_t value)
633{
634 int ret = -EINVAL;
635 struct drm_mode_object *obj = &plane->base;
636
637 if (plane->funcs->set_property)
638 ret = plane->funcs->set_property(plane, property, value);
639 if (!ret)
640 drm_object_property_set_value(obj, property, value);
641
642 return ret;
643}
644EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
645
646int drm_mode_getplane_res(struct drm_device *dev, void *data,
647 struct drm_file *file_priv)
648{
649 struct drm_mode_get_plane_res *plane_resp = data;
650 struct drm_plane *plane;
651 uint32_t __user *plane_ptr;
652 int count = 0;
653
654 if (!drm_core_check_feature(dev, DRIVER_MODESET))
655 return -EOPNOTSUPP;
656
657 plane_ptr = u64_to_user_ptr(plane_resp->plane_id_ptr);
658
659 /*
660 * This ioctl is called twice, once to determine how much space is
661 * needed, and the 2nd time to fill it.
662 */
663 drm_for_each_plane(plane, dev) {
664 /*
665 * Unless userspace set the 'universal planes'
666 * capability bit, only advertise overlays.
667 */
668 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
669 !file_priv->universal_planes)
670 continue;
671
672 if (drm_lease_held(file_priv, plane->base.id)) {
673 if (count < plane_resp->count_planes &&
674 put_user(plane->base.id, plane_ptr + count))
675 return -EFAULT;
676 count++;
677 }
678 }
679 plane_resp->count_planes = count;
680
681 return 0;
682}
683
684int drm_mode_getplane(struct drm_device *dev, void *data,
685 struct drm_file *file_priv)
686{
687 struct drm_mode_get_plane *plane_resp = data;
688 struct drm_plane *plane;
689 uint32_t __user *format_ptr;
690
691 if (!drm_core_check_feature(dev, DRIVER_MODESET))
692 return -EOPNOTSUPP;
693
694 plane = drm_plane_find(dev, file_priv, plane_resp->plane_id);
695 if (!plane)
696 return -ENOENT;
697
698 drm_modeset_lock(&plane->mutex, NULL);
699 if (plane->state && plane->state->crtc && drm_lease_held(file_priv, plane->state->crtc->base.id))
700 plane_resp->crtc_id = plane->state->crtc->base.id;
701 else if (!plane->state && plane->crtc && drm_lease_held(file_priv, plane->crtc->base.id))
702 plane_resp->crtc_id = plane->crtc->base.id;
703 else
704 plane_resp->crtc_id = 0;
705
706 if (plane->state && plane->state->fb)
707 plane_resp->fb_id = plane->state->fb->base.id;
708 else if (!plane->state && plane->fb)
709 plane_resp->fb_id = plane->fb->base.id;
710 else
711 plane_resp->fb_id = 0;
712 drm_modeset_unlock(&plane->mutex);
713
714 plane_resp->plane_id = plane->base.id;
715 plane_resp->possible_crtcs = drm_lease_filter_crtcs(file_priv,
716 plane->possible_crtcs);
717
718 plane_resp->gamma_size = 0;
719
720 /*
721 * This ioctl is called twice, once to determine how much space is
722 * needed, and the 2nd time to fill it.
723 */
724 if (plane->format_count &&
725 (plane_resp->count_format_types >= plane->format_count)) {
726 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
727 if (copy_to_user(format_ptr,
728 plane->format_types,
729 sizeof(uint32_t) * plane->format_count)) {
730 return -EFAULT;
731 }
732 }
733 plane_resp->count_format_types = plane->format_count;
734
735 return 0;
736}
737
738int drm_plane_check_pixel_format(struct drm_plane *plane,
739 u32 format, u64 modifier)
740{
741 unsigned int i;
742
743 for (i = 0; i < plane->format_count; i++) {
744 if (format == plane->format_types[i])
745 break;
746 }
747 if (i == plane->format_count)
748 return -EINVAL;
749
750 if (plane->funcs->format_mod_supported) {
751 if (!plane->funcs->format_mod_supported(plane, format, modifier))
752 return -EINVAL;
753 } else {
754 if (!plane->modifier_count)
755 return 0;
756
757 for (i = 0; i < plane->modifier_count; i++) {
758 if (modifier == plane->modifiers[i])
759 break;
760 }
761 if (i == plane->modifier_count)
762 return -EINVAL;
763 }
764
765 return 0;
766}
767
768static int __setplane_check(struct drm_plane *plane,
769 struct drm_crtc *crtc,
770 struct drm_framebuffer *fb,
771 int32_t crtc_x, int32_t crtc_y,
772 uint32_t crtc_w, uint32_t crtc_h,
773 uint32_t src_x, uint32_t src_y,
774 uint32_t src_w, uint32_t src_h)
775{
776 int ret;
777
778 /* Check whether this plane is usable on this CRTC */
779 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
780 DRM_DEBUG_KMS("Invalid crtc for plane\n");
781 return -EINVAL;
782 }
783
784 /* Check whether this plane supports the fb pixel format. */
785 ret = drm_plane_check_pixel_format(plane, fb->format->format,
786 fb->modifier);
787 if (ret) {
788 DRM_DEBUG_KMS("Invalid pixel format %p4cc, modifier 0x%llx\n",
789 &fb->format->format, fb->modifier);
790 return ret;
791 }
792
793 /* Give drivers some help against integer overflows */
794 if (crtc_w > INT_MAX ||
795 crtc_x > INT_MAX - (int32_t) crtc_w ||
796 crtc_h > INT_MAX ||
797 crtc_y > INT_MAX - (int32_t) crtc_h) {
798 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
799 crtc_w, crtc_h, crtc_x, crtc_y);
800 return -ERANGE;
801 }
802
803 ret = drm_framebuffer_check_src_coords(src_x, src_y, src_w, src_h, fb);
804 if (ret)
805 return ret;
806
807 return 0;
808}
809
810/**
811 * drm_any_plane_has_format - Check whether any plane supports this format and modifier combination
812 * @dev: DRM device
813 * @format: pixel format (DRM_FORMAT_*)
814 * @modifier: data layout modifier
815 *
816 * Returns:
817 * Whether at least one plane supports the specified format and modifier combination.
818 */
819bool drm_any_plane_has_format(struct drm_device *dev,
820 u32 format, u64 modifier)
821{
822 struct drm_plane *plane;
823
824 drm_for_each_plane(plane, dev) {
825 if (drm_plane_check_pixel_format(plane, format, modifier) == 0)
826 return true;
827 }
828
829 return false;
830}
831EXPORT_SYMBOL(drm_any_plane_has_format);
832
833/*
834 * __setplane_internal - setplane handler for internal callers
835 *
836 * This function will take a reference on the new fb for the plane
837 * on success.
838 *
839 * src_{x,y,w,h} are provided in 16.16 fixed point format
840 */
841static int __setplane_internal(struct drm_plane *plane,
842 struct drm_crtc *crtc,
843 struct drm_framebuffer *fb,
844 int32_t crtc_x, int32_t crtc_y,
845 uint32_t crtc_w, uint32_t crtc_h,
846 /* src_{x,y,w,h} values are 16.16 fixed point */
847 uint32_t src_x, uint32_t src_y,
848 uint32_t src_w, uint32_t src_h,
849 struct drm_modeset_acquire_ctx *ctx)
850{
851 int ret = 0;
852
853 WARN_ON(drm_drv_uses_atomic_modeset(plane->dev));
854
855 /* No fb means shut it down */
856 if (!fb) {
857 plane->old_fb = plane->fb;
858 ret = plane->funcs->disable_plane(plane, ctx);
859 if (!ret) {
860 plane->crtc = NULL;
861 plane->fb = NULL;
862 } else {
863 plane->old_fb = NULL;
864 }
865 goto out;
866 }
867
868 ret = __setplane_check(plane, crtc, fb,
869 crtc_x, crtc_y, crtc_w, crtc_h,
870 src_x, src_y, src_w, src_h);
871 if (ret)
872 goto out;
873
874 plane->old_fb = plane->fb;
875 ret = plane->funcs->update_plane(plane, crtc, fb,
876 crtc_x, crtc_y, crtc_w, crtc_h,
877 src_x, src_y, src_w, src_h, ctx);
878 if (!ret) {
879 plane->crtc = crtc;
880 plane->fb = fb;
881 drm_framebuffer_get(plane->fb);
882 } else {
883 plane->old_fb = NULL;
884 }
885
886out:
887 if (plane->old_fb)
888 drm_framebuffer_put(plane->old_fb);
889 plane->old_fb = NULL;
890
891 return ret;
892}
893
894static int __setplane_atomic(struct drm_plane *plane,
895 struct drm_crtc *crtc,
896 struct drm_framebuffer *fb,
897 int32_t crtc_x, int32_t crtc_y,
898 uint32_t crtc_w, uint32_t crtc_h,
899 uint32_t src_x, uint32_t src_y,
900 uint32_t src_w, uint32_t src_h,
901 struct drm_modeset_acquire_ctx *ctx)
902{
903 int ret;
904
905 WARN_ON(!drm_drv_uses_atomic_modeset(plane->dev));
906
907 /* No fb means shut it down */
908 if (!fb)
909 return plane->funcs->disable_plane(plane, ctx);
910
911 /*
912 * FIXME: This is redundant with drm_atomic_plane_check(),
913 * but the legacy cursor/"async" .update_plane() tricks
914 * don't call that so we still need this here. Should remove
915 * this when all .update_plane() implementations have been
916 * fixed to call drm_atomic_plane_check().
917 */
918 ret = __setplane_check(plane, crtc, fb,
919 crtc_x, crtc_y, crtc_w, crtc_h,
920 src_x, src_y, src_w, src_h);
921 if (ret)
922 return ret;
923
924 return plane->funcs->update_plane(plane, crtc, fb,
925 crtc_x, crtc_y, crtc_w, crtc_h,
926 src_x, src_y, src_w, src_h, ctx);
927}
928
929static int setplane_internal(struct drm_plane *plane,
930 struct drm_crtc *crtc,
931 struct drm_framebuffer *fb,
932 int32_t crtc_x, int32_t crtc_y,
933 uint32_t crtc_w, uint32_t crtc_h,
934 /* src_{x,y,w,h} values are 16.16 fixed point */
935 uint32_t src_x, uint32_t src_y,
936 uint32_t src_w, uint32_t src_h)
937{
938 struct drm_modeset_acquire_ctx ctx;
939 int ret;
940
941 DRM_MODESET_LOCK_ALL_BEGIN(plane->dev, ctx,
942 DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
943
944 if (drm_drv_uses_atomic_modeset(plane->dev))
945 ret = __setplane_atomic(plane, crtc, fb,
946 crtc_x, crtc_y, crtc_w, crtc_h,
947 src_x, src_y, src_w, src_h, &ctx);
948 else
949 ret = __setplane_internal(plane, crtc, fb,
950 crtc_x, crtc_y, crtc_w, crtc_h,
951 src_x, src_y, src_w, src_h, &ctx);
952
953 DRM_MODESET_LOCK_ALL_END(plane->dev, ctx, ret);
954
955 return ret;
956}
957
958int drm_mode_setplane(struct drm_device *dev, void *data,
959 struct drm_file *file_priv)
960{
961 struct drm_mode_set_plane *plane_req = data;
962 struct drm_plane *plane;
963 struct drm_crtc *crtc = NULL;
964 struct drm_framebuffer *fb = NULL;
965 int ret;
966
967 if (!drm_core_check_feature(dev, DRIVER_MODESET))
968 return -EOPNOTSUPP;
969
970 /*
971 * First, find the plane, crtc, and fb objects. If not available,
972 * we don't bother to call the driver.
973 */
974 plane = drm_plane_find(dev, file_priv, plane_req->plane_id);
975 if (!plane) {
976 DRM_DEBUG_KMS("Unknown plane ID %d\n",
977 plane_req->plane_id);
978 return -ENOENT;
979 }
980
981 if (plane_req->fb_id) {
982 fb = drm_framebuffer_lookup(dev, file_priv, plane_req->fb_id);
983 if (!fb) {
984 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
985 plane_req->fb_id);
986 return -ENOENT;
987 }
988
989 crtc = drm_crtc_find(dev, file_priv, plane_req->crtc_id);
990 if (!crtc) {
991 drm_framebuffer_put(fb);
992 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
993 plane_req->crtc_id);
994 return -ENOENT;
995 }
996 }
997
998 ret = setplane_internal(plane, crtc, fb,
999 plane_req->crtc_x, plane_req->crtc_y,
1000 plane_req->crtc_w, plane_req->crtc_h,
1001 plane_req->src_x, plane_req->src_y,
1002 plane_req->src_w, plane_req->src_h);
1003
1004 if (fb)
1005 drm_framebuffer_put(fb);
1006
1007 return ret;
1008}
1009
1010static int drm_mode_cursor_universal(struct drm_crtc *crtc,
1011 struct drm_mode_cursor2 *req,
1012 struct drm_file *file_priv,
1013 struct drm_modeset_acquire_ctx *ctx)
1014{
1015 struct drm_device *dev = crtc->dev;
1016 struct drm_plane *plane = crtc->cursor;
1017 struct drm_framebuffer *fb = NULL;
1018 struct drm_mode_fb_cmd2 fbreq = {
1019 .width = req->width,
1020 .height = req->height,
1021 .pixel_format = DRM_FORMAT_ARGB8888,
1022 .pitches = { req->width * 4 },
1023 .handles = { req->handle },
1024 };
1025 int32_t crtc_x, crtc_y;
1026 uint32_t crtc_w = 0, crtc_h = 0;
1027 uint32_t src_w = 0, src_h = 0;
1028 int ret = 0;
1029
1030 BUG_ON(!plane);
1031 WARN_ON(plane->crtc != crtc && plane->crtc != NULL);
1032
1033 /*
1034 * Obtain fb we'll be using (either new or existing) and take an extra
1035 * reference to it if fb != null. setplane will take care of dropping
1036 * the reference if the plane update fails.
1037 */
1038 if (req->flags & DRM_MODE_CURSOR_BO) {
1039 if (req->handle) {
1040 fb = drm_internal_framebuffer_create(dev, &fbreq, file_priv);
1041 if (IS_ERR(fb)) {
1042 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
1043 return PTR_ERR(fb);
1044 }
1045
1046 fb->hot_x = req->hot_x;
1047 fb->hot_y = req->hot_y;
1048 } else {
1049 fb = NULL;
1050 }
1051 } else {
1052 if (plane->state)
1053 fb = plane->state->fb;
1054 else
1055 fb = plane->fb;
1056
1057 if (fb)
1058 drm_framebuffer_get(fb);
1059 }
1060
1061 if (req->flags & DRM_MODE_CURSOR_MOVE) {
1062 crtc_x = req->x;
1063 crtc_y = req->y;
1064 } else {
1065 crtc_x = crtc->cursor_x;
1066 crtc_y = crtc->cursor_y;
1067 }
1068
1069 if (fb) {
1070 crtc_w = fb->width;
1071 crtc_h = fb->height;
1072 src_w = fb->width << 16;
1073 src_h = fb->height << 16;
1074 }
1075
1076 if (drm_drv_uses_atomic_modeset(dev))
1077 ret = __setplane_atomic(plane, crtc, fb,
1078 crtc_x, crtc_y, crtc_w, crtc_h,
1079 0, 0, src_w, src_h, ctx);
1080 else
1081 ret = __setplane_internal(plane, crtc, fb,
1082 crtc_x, crtc_y, crtc_w, crtc_h,
1083 0, 0, src_w, src_h, ctx);
1084
1085 if (fb)
1086 drm_framebuffer_put(fb);
1087
1088 /* Update successful; save new cursor position, if necessary */
1089 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
1090 crtc->cursor_x = req->x;
1091 crtc->cursor_y = req->y;
1092 }
1093
1094 return ret;
1095}
1096
1097static int drm_mode_cursor_common(struct drm_device *dev,
1098 struct drm_mode_cursor2 *req,
1099 struct drm_file *file_priv)
1100{
1101 struct drm_crtc *crtc;
1102 struct drm_modeset_acquire_ctx ctx;
1103 int ret = 0;
1104
1105 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1106 return -EOPNOTSUPP;
1107
1108 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
1109 return -EINVAL;
1110
1111 crtc = drm_crtc_find(dev, file_priv, req->crtc_id);
1112 if (!crtc) {
1113 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
1114 return -ENOENT;
1115 }
1116
1117 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1118retry:
1119 ret = drm_modeset_lock(&crtc->mutex, &ctx);
1120 if (ret)
1121 goto out;
1122 /*
1123 * If this crtc has a universal cursor plane, call that plane's update
1124 * handler rather than using legacy cursor handlers.
1125 */
1126 if (crtc->cursor) {
1127 ret = drm_modeset_lock(&crtc->cursor->mutex, &ctx);
1128 if (ret)
1129 goto out;
1130
1131 if (!drm_lease_held(file_priv, crtc->cursor->base.id)) {
1132 ret = -EACCES;
1133 goto out;
1134 }
1135
1136 ret = drm_mode_cursor_universal(crtc, req, file_priv, &ctx);
1137 goto out;
1138 }
1139
1140 if (req->flags & DRM_MODE_CURSOR_BO) {
1141 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
1142 ret = -ENXIO;
1143 goto out;
1144 }
1145 /* Turns off the cursor if handle is 0 */
1146 if (crtc->funcs->cursor_set2)
1147 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
1148 req->width, req->height, req->hot_x, req->hot_y);
1149 else
1150 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
1151 req->width, req->height);
1152 }
1153
1154 if (req->flags & DRM_MODE_CURSOR_MOVE) {
1155 if (crtc->funcs->cursor_move) {
1156 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
1157 } else {
1158 ret = -EFAULT;
1159 goto out;
1160 }
1161 }
1162out:
1163 if (ret == -EDEADLK) {
1164 ret = drm_modeset_backoff(&ctx);
1165 if (!ret)
1166 goto retry;
1167 }
1168
1169 drm_modeset_drop_locks(&ctx);
1170 drm_modeset_acquire_fini(&ctx);
1171
1172 return ret;
1173
1174}
1175
1176
1177int drm_mode_cursor_ioctl(struct drm_device *dev,
1178 void *data, struct drm_file *file_priv)
1179{
1180 struct drm_mode_cursor *req = data;
1181 struct drm_mode_cursor2 new_req;
1182
1183 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
1184 new_req.hot_x = new_req.hot_y = 0;
1185
1186 return drm_mode_cursor_common(dev, &new_req, file_priv);
1187}
1188
1189/*
1190 * Set the cursor configuration based on user request. This implements the 2nd
1191 * version of the cursor ioctl, which allows userspace to additionally specify
1192 * the hotspot of the pointer.
1193 */
1194int drm_mode_cursor2_ioctl(struct drm_device *dev,
1195 void *data, struct drm_file *file_priv)
1196{
1197 struct drm_mode_cursor2 *req = data;
1198
1199 return drm_mode_cursor_common(dev, req, file_priv);
1200}
1201
1202int drm_mode_page_flip_ioctl(struct drm_device *dev,
1203 void *data, struct drm_file *file_priv)
1204{
1205 struct drm_mode_crtc_page_flip_target *page_flip = data;
1206 struct drm_crtc *crtc;
1207 struct drm_plane *plane;
1208 struct drm_framebuffer *fb = NULL, *old_fb;
1209 struct drm_pending_vblank_event *e = NULL;
1210 u32 target_vblank = page_flip->sequence;
1211 struct drm_modeset_acquire_ctx ctx;
1212 int ret = -EINVAL;
1213
1214 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1215 return -EOPNOTSUPP;
1216
1217 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS)
1218 return -EINVAL;
1219
1220 if (page_flip->sequence != 0 && !(page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET))
1221 return -EINVAL;
1222
1223 /* Only one of the DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags
1224 * can be specified
1225 */
1226 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) == DRM_MODE_PAGE_FLIP_TARGET)
1227 return -EINVAL;
1228
1229 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
1230 return -EINVAL;
1231
1232 crtc = drm_crtc_find(dev, file_priv, page_flip->crtc_id);
1233 if (!crtc)
1234 return -ENOENT;
1235
1236 plane = crtc->primary;
1237
1238 if (!drm_lease_held(file_priv, plane->base.id))
1239 return -EACCES;
1240
1241 if (crtc->funcs->page_flip_target) {
1242 u32 current_vblank;
1243 int r;
1244
1245 r = drm_crtc_vblank_get(crtc);
1246 if (r)
1247 return r;
1248
1249 current_vblank = (u32)drm_crtc_vblank_count(crtc);
1250
1251 switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) {
1252 case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE:
1253 if ((int)(target_vblank - current_vblank) > 1) {
1254 DRM_DEBUG("Invalid absolute flip target %u, "
1255 "must be <= %u\n", target_vblank,
1256 current_vblank + 1);
1257 drm_crtc_vblank_put(crtc);
1258 return -EINVAL;
1259 }
1260 break;
1261 case DRM_MODE_PAGE_FLIP_TARGET_RELATIVE:
1262 if (target_vblank != 0 && target_vblank != 1) {
1263 DRM_DEBUG("Invalid relative flip target %u, "
1264 "must be 0 or 1\n", target_vblank);
1265 drm_crtc_vblank_put(crtc);
1266 return -EINVAL;
1267 }
1268 target_vblank += current_vblank;
1269 break;
1270 default:
1271 target_vblank = current_vblank +
1272 !(page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC);
1273 break;
1274 }
1275 } else if (crtc->funcs->page_flip == NULL ||
1276 (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET)) {
1277 return -EINVAL;
1278 }
1279
1280 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1281retry:
1282 ret = drm_modeset_lock(&crtc->mutex, &ctx);
1283 if (ret)
1284 goto out;
1285 ret = drm_modeset_lock(&plane->mutex, &ctx);
1286 if (ret)
1287 goto out;
1288
1289 if (plane->state)
1290 old_fb = plane->state->fb;
1291 else
1292 old_fb = plane->fb;
1293
1294 if (old_fb == NULL) {
1295 /* The framebuffer is currently unbound, presumably
1296 * due to a hotplug event, that userspace has not
1297 * yet discovered.
1298 */
1299 ret = -EBUSY;
1300 goto out;
1301 }
1302
1303 fb = drm_framebuffer_lookup(dev, file_priv, page_flip->fb_id);
1304 if (!fb) {
1305 ret = -ENOENT;
1306 goto out;
1307 }
1308
1309 if (plane->state) {
1310 const struct drm_plane_state *state = plane->state;
1311
1312 ret = drm_framebuffer_check_src_coords(state->src_x,
1313 state->src_y,
1314 state->src_w,
1315 state->src_h,
1316 fb);
1317 } else {
1318 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y,
1319 &crtc->mode, fb);
1320 }
1321 if (ret)
1322 goto out;
1323
1324 /*
1325 * Only check the FOURCC format code, excluding modifiers. This is
1326 * enough for all legacy drivers. Atomic drivers have their own
1327 * checks in their ->atomic_check implementation, which will
1328 * return -EINVAL if any hw or driver constraint is violated due
1329 * to modifier changes.
1330 */
1331 if (old_fb->format->format != fb->format->format) {
1332 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
1333 ret = -EINVAL;
1334 goto out;
1335 }
1336
1337 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1338 e = kzalloc(sizeof *e, GFP_KERNEL);
1339 if (!e) {
1340 ret = -ENOMEM;
1341 goto out;
1342 }
1343
1344 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1345 e->event.base.length = sizeof(e->event);
1346 e->event.vbl.user_data = page_flip->user_data;
1347 e->event.vbl.crtc_id = crtc->base.id;
1348
1349 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
1350 if (ret) {
1351 kfree(e);
1352 e = NULL;
1353 goto out;
1354 }
1355 }
1356
1357 plane->old_fb = plane->fb;
1358 if (crtc->funcs->page_flip_target)
1359 ret = crtc->funcs->page_flip_target(crtc, fb, e,
1360 page_flip->flags,
1361 target_vblank,
1362 &ctx);
1363 else
1364 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags,
1365 &ctx);
1366 if (ret) {
1367 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT)
1368 drm_event_cancel_free(dev, &e->base);
1369 /* Keep the old fb, don't unref it. */
1370 plane->old_fb = NULL;
1371 } else {
1372 if (!plane->state) {
1373 plane->fb = fb;
1374 drm_framebuffer_get(fb);
1375 }
1376 }
1377
1378out:
1379 if (fb)
1380 drm_framebuffer_put(fb);
1381 if (plane->old_fb)
1382 drm_framebuffer_put(plane->old_fb);
1383 plane->old_fb = NULL;
1384
1385 if (ret == -EDEADLK) {
1386 ret = drm_modeset_backoff(&ctx);
1387 if (!ret)
1388 goto retry;
1389 }
1390
1391 drm_modeset_drop_locks(&ctx);
1392 drm_modeset_acquire_fini(&ctx);
1393
1394 if (ret && crtc->funcs->page_flip_target)
1395 drm_crtc_vblank_put(crtc);
1396
1397 return ret;
1398}
1399
1400struct drm_property *
1401drm_create_scaling_filter_prop(struct drm_device *dev,
1402 unsigned int supported_filters)
1403{
1404 struct drm_property *prop;
1405 static const struct drm_prop_enum_list props[] = {
1406 { DRM_SCALING_FILTER_DEFAULT, "Default" },
1407 { DRM_SCALING_FILTER_NEAREST_NEIGHBOR, "Nearest Neighbor" },
1408 };
1409 unsigned int valid_mode_mask = BIT(DRM_SCALING_FILTER_DEFAULT) |
1410 BIT(DRM_SCALING_FILTER_NEAREST_NEIGHBOR);
1411 int i;
1412
1413 if (WARN_ON((supported_filters & ~valid_mode_mask) ||
1414 ((supported_filters & BIT(DRM_SCALING_FILTER_DEFAULT)) == 0)))
1415 return ERR_PTR(-EINVAL);
1416
1417 prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
1418 "SCALING_FILTER",
1419 hweight32(supported_filters));
1420 if (!prop)
1421 return ERR_PTR(-ENOMEM);
1422
1423 for (i = 0; i < ARRAY_SIZE(props); i++) {
1424 int ret;
1425
1426 if (!(BIT(props[i].type) & supported_filters))
1427 continue;
1428
1429 ret = drm_property_add_enum(prop, props[i].type,
1430 props[i].name);
1431
1432 if (ret) {
1433 drm_property_destroy(dev, prop);
1434
1435 return ERR_PTR(ret);
1436 }
1437 }
1438
1439 return prop;
1440}
1441
1442/**
1443 * drm_plane_create_scaling_filter_property - create a new scaling filter
1444 * property
1445 *
1446 * @plane: drm plane
1447 * @supported_filters: bitmask of supported scaling filters, must include
1448 * BIT(DRM_SCALING_FILTER_DEFAULT).
1449 *
1450 * This function lets driver to enable the scaling filter property on a given
1451 * plane.
1452 *
1453 * RETURNS:
1454 * Zero for success or -errno
1455 */
1456int drm_plane_create_scaling_filter_property(struct drm_plane *plane,
1457 unsigned int supported_filters)
1458{
1459 struct drm_property *prop =
1460 drm_create_scaling_filter_prop(plane->dev, supported_filters);
1461
1462 if (IS_ERR(prop))
1463 return PTR_ERR(prop);
1464
1465 drm_object_attach_property(&plane->base, prop,
1466 DRM_SCALING_FILTER_DEFAULT);
1467 plane->scaling_filter_property = prop;
1468
1469 return 0;
1470}
1471EXPORT_SYMBOL(drm_plane_create_scaling_filter_property);