Loading...
Note: File does not exist in v4.6.
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 <drm/drmP.h>
24#include <drm/drm_plane.h>
25
26#include "drm_crtc_internal.h"
27
28/**
29 * DOC: overview
30 *
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.
38 *
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().
42 *
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().
48 *
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".
51 */
52
53static unsigned int drm_num_planes(struct drm_device *dev)
54{
55 unsigned int num = 0;
56 struct drm_plane *tmp;
57
58 drm_for_each_plane(tmp, dev) {
59 num++;
60 }
61
62 return num;
63}
64
65static inline u32 *
66formats_ptr(struct drm_format_modifier_blob *blob)
67{
68 return (u32 *)(((char *)blob) + blob->formats_offset);
69}
70
71static inline struct drm_format_modifier *
72modifiers_ptr(struct drm_format_modifier_blob *blob)
73{
74 return (struct drm_format_modifier *)(((char *)blob) + blob->modifiers_offset);
75}
76
77static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane)
78{
79 const struct drm_mode_config *config = &dev->mode_config;
80 struct drm_property_blob *blob;
81 struct drm_format_modifier *mod;
82 size_t blob_size, formats_size, modifiers_size;
83 struct drm_format_modifier_blob *blob_data;
84 unsigned int i, j;
85
86 formats_size = sizeof(__u32) * plane->format_count;
87 if (WARN_ON(!formats_size)) {
88 /* 0 formats are never expected */
89 return 0;
90 }
91
92 modifiers_size =
93 sizeof(struct drm_format_modifier) * plane->modifier_count;
94
95 blob_size = sizeof(struct drm_format_modifier_blob);
96 /* Modifiers offset is a pointer to a struct with a 64 bit field so it
97 * should be naturally aligned to 8B.
98 */
99 BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8);
100 blob_size += ALIGN(formats_size, 8);
101 blob_size += modifiers_size;
102
103 blob = drm_property_create_blob(dev, blob_size, NULL);
104 if (IS_ERR(blob))
105 return -1;
106
107 blob_data = blob->data;
108 blob_data->version = FORMAT_BLOB_CURRENT;
109 blob_data->count_formats = plane->format_count;
110 blob_data->formats_offset = sizeof(struct drm_format_modifier_blob);
111 blob_data->count_modifiers = plane->modifier_count;
112
113 blob_data->modifiers_offset =
114 ALIGN(blob_data->formats_offset + formats_size, 8);
115
116 memcpy(formats_ptr(blob_data), plane->format_types, formats_size);
117
118 /* If we can't determine support, just bail */
119 if (!plane->funcs->format_mod_supported)
120 goto done;
121
122 mod = modifiers_ptr(blob_data);
123 for (i = 0; i < plane->modifier_count; i++) {
124 for (j = 0; j < plane->format_count; j++) {
125 if (plane->funcs->format_mod_supported(plane,
126 plane->format_types[j],
127 plane->modifiers[i])) {
128
129 mod->formats |= 1ULL << j;
130 }
131 }
132
133 mod->modifier = plane->modifiers[i];
134 mod->offset = 0;
135 mod->pad = 0;
136 mod++;
137 }
138
139done:
140 drm_object_attach_property(&plane->base, config->modifiers_property,
141 blob->base.id);
142
143 return 0;
144}
145
146/**
147 * drm_universal_plane_init - Initialize a new universal plane object
148 * @dev: DRM device
149 * @plane: plane object to init
150 * @possible_crtcs: bitmask of possible CRTCs
151 * @funcs: callbacks for the new plane
152 * @formats: array of supported formats (DRM_FORMAT\_\*)
153 * @format_count: number of elements in @formats
154 * @format_modifiers: array of struct drm_format modifiers terminated by
155 * DRM_FORMAT_MOD_INVALID
156 * @type: type of plane (overlay, primary, cursor)
157 * @name: printf style format string for the plane name, or NULL for default name
158 *
159 * Initializes a plane object of type @type.
160 *
161 * Returns:
162 * Zero on success, error code on failure.
163 */
164int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
165 uint32_t possible_crtcs,
166 const struct drm_plane_funcs *funcs,
167 const uint32_t *formats, unsigned int format_count,
168 const uint64_t *format_modifiers,
169 enum drm_plane_type type,
170 const char *name, ...)
171{
172 struct drm_mode_config *config = &dev->mode_config;
173 unsigned int format_modifier_count = 0;
174 int ret;
175
176 /* plane index is used with 32bit bitmasks */
177 if (WARN_ON(config->num_total_plane >= 32))
178 return -EINVAL;
179
180 ret = drm_mode_object_add(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
181 if (ret)
182 return ret;
183
184 drm_modeset_lock_init(&plane->mutex);
185
186 plane->base.properties = &plane->properties;
187 plane->dev = dev;
188 plane->funcs = funcs;
189 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
190 GFP_KERNEL);
191 if (!plane->format_types) {
192 DRM_DEBUG_KMS("out of memory when allocating plane\n");
193 drm_mode_object_unregister(dev, &plane->base);
194 return -ENOMEM;
195 }
196
197 /*
198 * First driver to need more than 64 formats needs to fix this. Each
199 * format is encoded as a bit and the current code only supports a u64.
200 */
201 if (WARN_ON(format_count > 64))
202 return -EINVAL;
203
204 if (format_modifiers) {
205 const uint64_t *temp_modifiers = format_modifiers;
206 while (*temp_modifiers++ != DRM_FORMAT_MOD_INVALID)
207 format_modifier_count++;
208 }
209
210 plane->modifier_count = format_modifier_count;
211 plane->modifiers = kmalloc_array(format_modifier_count,
212 sizeof(format_modifiers[0]),
213 GFP_KERNEL);
214
215 if (format_modifier_count && !plane->modifiers) {
216 DRM_DEBUG_KMS("out of memory when allocating plane\n");
217 kfree(plane->format_types);
218 drm_mode_object_unregister(dev, &plane->base);
219 return -ENOMEM;
220 }
221
222 if (name) {
223 va_list ap;
224
225 va_start(ap, name);
226 plane->name = kvasprintf(GFP_KERNEL, name, ap);
227 va_end(ap);
228 } else {
229 plane->name = kasprintf(GFP_KERNEL, "plane-%d",
230 drm_num_planes(dev));
231 }
232 if (!plane->name) {
233 kfree(plane->format_types);
234 kfree(plane->modifiers);
235 drm_mode_object_unregister(dev, &plane->base);
236 return -ENOMEM;
237 }
238
239 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
240 plane->format_count = format_count;
241 memcpy(plane->modifiers, format_modifiers,
242 format_modifier_count * sizeof(format_modifiers[0]));
243 plane->possible_crtcs = possible_crtcs;
244 plane->type = type;
245
246 list_add_tail(&plane->head, &config->plane_list);
247 plane->index = config->num_total_plane++;
248
249 drm_object_attach_property(&plane->base,
250 config->plane_type_property,
251 plane->type);
252
253 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
254 drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
255 drm_object_attach_property(&plane->base, config->prop_in_fence_fd, -1);
256 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
257 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
258 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
259 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
260 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
261 drm_object_attach_property(&plane->base, config->prop_src_x, 0);
262 drm_object_attach_property(&plane->base, config->prop_src_y, 0);
263 drm_object_attach_property(&plane->base, config->prop_src_w, 0);
264 drm_object_attach_property(&plane->base, config->prop_src_h, 0);
265 }
266
267 if (config->allow_fb_modifiers)
268 create_in_format_blob(dev, plane);
269
270 return 0;
271}
272EXPORT_SYMBOL(drm_universal_plane_init);
273
274int drm_plane_register_all(struct drm_device *dev)
275{
276 struct drm_plane *plane;
277 int ret = 0;
278
279 drm_for_each_plane(plane, dev) {
280 if (plane->funcs->late_register)
281 ret = plane->funcs->late_register(plane);
282 if (ret)
283 return ret;
284 }
285
286 return 0;
287}
288
289void drm_plane_unregister_all(struct drm_device *dev)
290{
291 struct drm_plane *plane;
292
293 drm_for_each_plane(plane, dev) {
294 if (plane->funcs->early_unregister)
295 plane->funcs->early_unregister(plane);
296 }
297}
298
299/**
300 * drm_plane_init - Initialize a legacy plane
301 * @dev: DRM device
302 * @plane: plane object to init
303 * @possible_crtcs: bitmask of possible CRTCs
304 * @funcs: callbacks for the new plane
305 * @formats: array of supported formats (DRM_FORMAT\_\*)
306 * @format_count: number of elements in @formats
307 * @is_primary: plane type (primary vs overlay)
308 *
309 * Legacy API to initialize a DRM plane.
310 *
311 * New drivers should call drm_universal_plane_init() instead.
312 *
313 * Returns:
314 * Zero on success, error code on failure.
315 */
316int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
317 uint32_t possible_crtcs,
318 const struct drm_plane_funcs *funcs,
319 const uint32_t *formats, unsigned int format_count,
320 bool is_primary)
321{
322 enum drm_plane_type type;
323
324 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
325 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
326 formats, format_count,
327 NULL, type, NULL);
328}
329EXPORT_SYMBOL(drm_plane_init);
330
331/**
332 * drm_plane_cleanup - Clean up the core plane usage
333 * @plane: plane to cleanup
334 *
335 * This function cleans up @plane and removes it from the DRM mode setting
336 * core. Note that the function does *not* free the plane structure itself,
337 * this is the responsibility of the caller.
338 */
339void drm_plane_cleanup(struct drm_plane *plane)
340{
341 struct drm_device *dev = plane->dev;
342
343 drm_modeset_lock_fini(&plane->mutex);
344
345 kfree(plane->format_types);
346 kfree(plane->modifiers);
347 drm_mode_object_unregister(dev, &plane->base);
348
349 BUG_ON(list_empty(&plane->head));
350
351 /* Note that the plane_list is considered to be static; should we
352 * remove the drm_plane at runtime we would have to decrement all
353 * the indices on the drm_plane after us in the plane_list.
354 */
355
356 list_del(&plane->head);
357 dev->mode_config.num_total_plane--;
358
359 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
360 if (plane->state && plane->funcs->atomic_destroy_state)
361 plane->funcs->atomic_destroy_state(plane, plane->state);
362
363 kfree(plane->name);
364
365 memset(plane, 0, sizeof(*plane));
366}
367EXPORT_SYMBOL(drm_plane_cleanup);
368
369/**
370 * drm_plane_from_index - find the registered plane at an index
371 * @dev: DRM device
372 * @idx: index of registered plane to find for
373 *
374 * Given a plane index, return the registered plane from DRM device's
375 * list of planes with matching index. This is the inverse of drm_plane_index().
376 */
377struct drm_plane *
378drm_plane_from_index(struct drm_device *dev, int idx)
379{
380 struct drm_plane *plane;
381
382 drm_for_each_plane(plane, dev)
383 if (idx == plane->index)
384 return plane;
385
386 return NULL;
387}
388EXPORT_SYMBOL(drm_plane_from_index);
389
390/**
391 * drm_plane_force_disable - Forcibly disable a plane
392 * @plane: plane to disable
393 *
394 * Forces the plane to be disabled.
395 *
396 * Used when the plane's current framebuffer is destroyed,
397 * and when restoring fbdev mode.
398 *
399 * Note that this function is not suitable for atomic drivers, since it doesn't
400 * wire through the lock acquisition context properly and hence can't handle
401 * retries or driver private locks. You probably want to use
402 * drm_atomic_helper_disable_plane() or
403 * drm_atomic_helper_disable_planes_on_crtc() instead.
404 */
405void drm_plane_force_disable(struct drm_plane *plane)
406{
407 int ret;
408
409 if (!plane->fb)
410 return;
411
412 WARN_ON(drm_drv_uses_atomic_modeset(plane->dev));
413
414 plane->old_fb = plane->fb;
415 ret = plane->funcs->disable_plane(plane, NULL);
416 if (ret) {
417 DRM_ERROR("failed to disable plane with busy fb\n");
418 plane->old_fb = NULL;
419 return;
420 }
421 /* disconnect the plane from the fb and crtc: */
422 drm_framebuffer_put(plane->old_fb);
423 plane->old_fb = NULL;
424 plane->fb = NULL;
425 plane->crtc = NULL;
426}
427EXPORT_SYMBOL(drm_plane_force_disable);
428
429/**
430 * drm_mode_plane_set_obj_prop - set the value of a property
431 * @plane: drm plane object to set property value for
432 * @property: property to set
433 * @value: value the property should be set to
434 *
435 * This functions sets a given property on a given plane object. This function
436 * calls the driver's ->set_property callback and changes the software state of
437 * the property if the callback succeeds.
438 *
439 * Returns:
440 * Zero on success, error code on failure.
441 */
442int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
443 struct drm_property *property,
444 uint64_t value)
445{
446 int ret = -EINVAL;
447 struct drm_mode_object *obj = &plane->base;
448
449 if (plane->funcs->set_property)
450 ret = plane->funcs->set_property(plane, property, value);
451 if (!ret)
452 drm_object_property_set_value(obj, property, value);
453
454 return ret;
455}
456EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
457
458int drm_mode_getplane_res(struct drm_device *dev, void *data,
459 struct drm_file *file_priv)
460{
461 struct drm_mode_get_plane_res *plane_resp = data;
462 struct drm_mode_config *config;
463 struct drm_plane *plane;
464 uint32_t __user *plane_ptr;
465 int count = 0;
466
467 if (!drm_core_check_feature(dev, DRIVER_MODESET))
468 return -EINVAL;
469
470 config = &dev->mode_config;
471 plane_ptr = u64_to_user_ptr(plane_resp->plane_id_ptr);
472
473 /*
474 * This ioctl is called twice, once to determine how much space is
475 * needed, and the 2nd time to fill it.
476 */
477 drm_for_each_plane(plane, dev) {
478 /*
479 * Unless userspace set the 'universal planes'
480 * capability bit, only advertise overlays.
481 */
482 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
483 !file_priv->universal_planes)
484 continue;
485
486 if (drm_lease_held(file_priv, plane->base.id)) {
487 if (count < plane_resp->count_planes &&
488 put_user(plane->base.id, plane_ptr + count))
489 return -EFAULT;
490 count++;
491 }
492 }
493 plane_resp->count_planes = count;
494
495 return 0;
496}
497
498int drm_mode_getplane(struct drm_device *dev, void *data,
499 struct drm_file *file_priv)
500{
501 struct drm_mode_get_plane *plane_resp = data;
502 struct drm_plane *plane;
503 uint32_t __user *format_ptr;
504
505 if (!drm_core_check_feature(dev, DRIVER_MODESET))
506 return -EINVAL;
507
508 plane = drm_plane_find(dev, file_priv, plane_resp->plane_id);
509 if (!plane)
510 return -ENOENT;
511
512 drm_modeset_lock(&plane->mutex, NULL);
513 if (plane->state && plane->state->crtc && drm_lease_held(file_priv, plane->state->crtc->base.id))
514 plane_resp->crtc_id = plane->state->crtc->base.id;
515 else if (!plane->state && plane->crtc && drm_lease_held(file_priv, plane->crtc->base.id))
516 plane_resp->crtc_id = plane->crtc->base.id;
517 else
518 plane_resp->crtc_id = 0;
519
520 if (plane->state && plane->state->fb)
521 plane_resp->fb_id = plane->state->fb->base.id;
522 else if (!plane->state && plane->fb)
523 plane_resp->fb_id = plane->fb->base.id;
524 else
525 plane_resp->fb_id = 0;
526 drm_modeset_unlock(&plane->mutex);
527
528 plane_resp->plane_id = plane->base.id;
529 plane_resp->possible_crtcs = drm_lease_filter_crtcs(file_priv,
530 plane->possible_crtcs);
531
532 plane_resp->gamma_size = 0;
533
534 /*
535 * This ioctl is called twice, once to determine how much space is
536 * needed, and the 2nd time to fill it.
537 */
538 if (plane->format_count &&
539 (plane_resp->count_format_types >= plane->format_count)) {
540 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
541 if (copy_to_user(format_ptr,
542 plane->format_types,
543 sizeof(uint32_t) * plane->format_count)) {
544 return -EFAULT;
545 }
546 }
547 plane_resp->count_format_types = plane->format_count;
548
549 return 0;
550}
551
552int drm_plane_check_pixel_format(struct drm_plane *plane,
553 u32 format, u64 modifier)
554{
555 unsigned int i;
556
557 for (i = 0; i < plane->format_count; i++) {
558 if (format == plane->format_types[i])
559 break;
560 }
561 if (i == plane->format_count)
562 return -EINVAL;
563
564 if (!plane->modifier_count)
565 return 0;
566
567 for (i = 0; i < plane->modifier_count; i++) {
568 if (modifier == plane->modifiers[i])
569 break;
570 }
571 if (i == plane->modifier_count)
572 return -EINVAL;
573
574 if (plane->funcs->format_mod_supported &&
575 !plane->funcs->format_mod_supported(plane, format, modifier))
576 return -EINVAL;
577
578 return 0;
579}
580
581/*
582 * __setplane_internal - setplane handler for internal callers
583 *
584 * This function will take a reference on the new fb for the plane
585 * on success.
586 *
587 * src_{x,y,w,h} are provided in 16.16 fixed point format
588 */
589static int __setplane_internal(struct drm_plane *plane,
590 struct drm_crtc *crtc,
591 struct drm_framebuffer *fb,
592 int32_t crtc_x, int32_t crtc_y,
593 uint32_t crtc_w, uint32_t crtc_h,
594 /* src_{x,y,w,h} values are 16.16 fixed point */
595 uint32_t src_x, uint32_t src_y,
596 uint32_t src_w, uint32_t src_h,
597 struct drm_modeset_acquire_ctx *ctx)
598{
599 int ret = 0;
600
601 /* No fb means shut it down */
602 if (!fb) {
603 plane->old_fb = plane->fb;
604 ret = plane->funcs->disable_plane(plane, ctx);
605 if (!ret) {
606 plane->crtc = NULL;
607 plane->fb = NULL;
608 } else {
609 plane->old_fb = NULL;
610 }
611 goto out;
612 }
613
614 /* Check whether this plane is usable on this CRTC */
615 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
616 DRM_DEBUG_KMS("Invalid crtc for plane\n");
617 ret = -EINVAL;
618 goto out;
619 }
620
621 /* Check whether this plane supports the fb pixel format. */
622 ret = drm_plane_check_pixel_format(plane, fb->format->format,
623 fb->modifier);
624 if (ret) {
625 struct drm_format_name_buf format_name;
626 DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n",
627 drm_get_format_name(fb->format->format,
628 &format_name),
629 fb->modifier);
630 goto out;
631 }
632
633 /* Give drivers some help against integer overflows */
634 if (crtc_w > INT_MAX ||
635 crtc_x > INT_MAX - (int32_t) crtc_w ||
636 crtc_h > INT_MAX ||
637 crtc_y > INT_MAX - (int32_t) crtc_h) {
638 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
639 crtc_w, crtc_h, crtc_x, crtc_y);
640 ret = -ERANGE;
641 goto out;
642 }
643
644 ret = drm_framebuffer_check_src_coords(src_x, src_y, src_w, src_h, fb);
645 if (ret)
646 goto out;
647
648 plane->old_fb = plane->fb;
649 ret = plane->funcs->update_plane(plane, crtc, fb,
650 crtc_x, crtc_y, crtc_w, crtc_h,
651 src_x, src_y, src_w, src_h, ctx);
652 if (!ret) {
653 plane->crtc = crtc;
654 plane->fb = fb;
655 drm_framebuffer_get(plane->fb);
656 } else {
657 plane->old_fb = NULL;
658 }
659
660out:
661 if (plane->old_fb)
662 drm_framebuffer_put(plane->old_fb);
663 plane->old_fb = NULL;
664
665 return ret;
666}
667
668static int setplane_internal(struct drm_plane *plane,
669 struct drm_crtc *crtc,
670 struct drm_framebuffer *fb,
671 int32_t crtc_x, int32_t crtc_y,
672 uint32_t crtc_w, uint32_t crtc_h,
673 /* src_{x,y,w,h} values are 16.16 fixed point */
674 uint32_t src_x, uint32_t src_y,
675 uint32_t src_w, uint32_t src_h)
676{
677 struct drm_modeset_acquire_ctx ctx;
678 int ret;
679
680 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
681retry:
682 ret = drm_modeset_lock_all_ctx(plane->dev, &ctx);
683 if (ret)
684 goto fail;
685 ret = __setplane_internal(plane, crtc, fb,
686 crtc_x, crtc_y, crtc_w, crtc_h,
687 src_x, src_y, src_w, src_h, &ctx);
688
689fail:
690 if (ret == -EDEADLK) {
691 ret = drm_modeset_backoff(&ctx);
692 if (!ret)
693 goto retry;
694 }
695 drm_modeset_drop_locks(&ctx);
696 drm_modeset_acquire_fini(&ctx);
697
698 return ret;
699}
700
701int drm_mode_setplane(struct drm_device *dev, void *data,
702 struct drm_file *file_priv)
703{
704 struct drm_mode_set_plane *plane_req = data;
705 struct drm_plane *plane;
706 struct drm_crtc *crtc = NULL;
707 struct drm_framebuffer *fb = NULL;
708 int ret;
709
710 if (!drm_core_check_feature(dev, DRIVER_MODESET))
711 return -EINVAL;
712
713 /*
714 * First, find the plane, crtc, and fb objects. If not available,
715 * we don't bother to call the driver.
716 */
717 plane = drm_plane_find(dev, file_priv, plane_req->plane_id);
718 if (!plane) {
719 DRM_DEBUG_KMS("Unknown plane ID %d\n",
720 plane_req->plane_id);
721 return -ENOENT;
722 }
723
724 if (plane_req->fb_id) {
725 fb = drm_framebuffer_lookup(dev, file_priv, plane_req->fb_id);
726 if (!fb) {
727 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
728 plane_req->fb_id);
729 return -ENOENT;
730 }
731
732 crtc = drm_crtc_find(dev, file_priv, plane_req->crtc_id);
733 if (!crtc) {
734 drm_framebuffer_put(fb);
735 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
736 plane_req->crtc_id);
737 return -ENOENT;
738 }
739 }
740
741 ret = setplane_internal(plane, crtc, fb,
742 plane_req->crtc_x, plane_req->crtc_y,
743 plane_req->crtc_w, plane_req->crtc_h,
744 plane_req->src_x, plane_req->src_y,
745 plane_req->src_w, plane_req->src_h);
746
747 if (fb)
748 drm_framebuffer_put(fb);
749
750 return ret;
751}
752
753static int drm_mode_cursor_universal(struct drm_crtc *crtc,
754 struct drm_mode_cursor2 *req,
755 struct drm_file *file_priv,
756 struct drm_modeset_acquire_ctx *ctx)
757{
758 struct drm_device *dev = crtc->dev;
759 struct drm_framebuffer *fb = NULL;
760 struct drm_mode_fb_cmd2 fbreq = {
761 .width = req->width,
762 .height = req->height,
763 .pixel_format = DRM_FORMAT_ARGB8888,
764 .pitches = { req->width * 4 },
765 .handles = { req->handle },
766 };
767 int32_t crtc_x, crtc_y;
768 uint32_t crtc_w = 0, crtc_h = 0;
769 uint32_t src_w = 0, src_h = 0;
770 int ret = 0;
771
772 BUG_ON(!crtc->cursor);
773 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL);
774
775 /*
776 * Obtain fb we'll be using (either new or existing) and take an extra
777 * reference to it if fb != null. setplane will take care of dropping
778 * the reference if the plane update fails.
779 */
780 if (req->flags & DRM_MODE_CURSOR_BO) {
781 if (req->handle) {
782 fb = drm_internal_framebuffer_create(dev, &fbreq, file_priv);
783 if (IS_ERR(fb)) {
784 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
785 return PTR_ERR(fb);
786 }
787 fb->hot_x = req->hot_x;
788 fb->hot_y = req->hot_y;
789 } else {
790 fb = NULL;
791 }
792 } else {
793 fb = crtc->cursor->fb;
794 if (fb)
795 drm_framebuffer_get(fb);
796 }
797
798 if (req->flags & DRM_MODE_CURSOR_MOVE) {
799 crtc_x = req->x;
800 crtc_y = req->y;
801 } else {
802 crtc_x = crtc->cursor_x;
803 crtc_y = crtc->cursor_y;
804 }
805
806 if (fb) {
807 crtc_w = fb->width;
808 crtc_h = fb->height;
809 src_w = fb->width << 16;
810 src_h = fb->height << 16;
811 }
812
813 ret = __setplane_internal(crtc->cursor, crtc, fb,
814 crtc_x, crtc_y, crtc_w, crtc_h,
815 0, 0, src_w, src_h, ctx);
816
817 if (fb)
818 drm_framebuffer_put(fb);
819
820 /* Update successful; save new cursor position, if necessary */
821 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
822 crtc->cursor_x = req->x;
823 crtc->cursor_y = req->y;
824 }
825
826 return ret;
827}
828
829static int drm_mode_cursor_common(struct drm_device *dev,
830 struct drm_mode_cursor2 *req,
831 struct drm_file *file_priv)
832{
833 struct drm_crtc *crtc;
834 struct drm_modeset_acquire_ctx ctx;
835 int ret = 0;
836
837 if (!drm_core_check_feature(dev, DRIVER_MODESET))
838 return -EINVAL;
839
840 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
841 return -EINVAL;
842
843 crtc = drm_crtc_find(dev, file_priv, req->crtc_id);
844 if (!crtc) {
845 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
846 return -ENOENT;
847 }
848
849 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
850retry:
851 ret = drm_modeset_lock(&crtc->mutex, &ctx);
852 if (ret)
853 goto out;
854 /*
855 * If this crtc has a universal cursor plane, call that plane's update
856 * handler rather than using legacy cursor handlers.
857 */
858 if (crtc->cursor) {
859 ret = drm_modeset_lock(&crtc->cursor->mutex, &ctx);
860 if (ret)
861 goto out;
862
863 ret = drm_mode_cursor_universal(crtc, req, file_priv, &ctx);
864 goto out;
865 }
866
867 if (req->flags & DRM_MODE_CURSOR_BO) {
868 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
869 ret = -ENXIO;
870 goto out;
871 }
872 /* Turns off the cursor if handle is 0 */
873 if (crtc->funcs->cursor_set2)
874 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
875 req->width, req->height, req->hot_x, req->hot_y);
876 else
877 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
878 req->width, req->height);
879 }
880
881 if (req->flags & DRM_MODE_CURSOR_MOVE) {
882 if (crtc->funcs->cursor_move) {
883 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
884 } else {
885 ret = -EFAULT;
886 goto out;
887 }
888 }
889out:
890 if (ret == -EDEADLK) {
891 ret = drm_modeset_backoff(&ctx);
892 if (!ret)
893 goto retry;
894 }
895
896 drm_modeset_drop_locks(&ctx);
897 drm_modeset_acquire_fini(&ctx);
898
899 return ret;
900
901}
902
903
904int drm_mode_cursor_ioctl(struct drm_device *dev,
905 void *data, struct drm_file *file_priv)
906{
907 struct drm_mode_cursor *req = data;
908 struct drm_mode_cursor2 new_req;
909
910 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
911 new_req.hot_x = new_req.hot_y = 0;
912
913 return drm_mode_cursor_common(dev, &new_req, file_priv);
914}
915
916/*
917 * Set the cursor configuration based on user request. This implements the 2nd
918 * version of the cursor ioctl, which allows userspace to additionally specify
919 * the hotspot of the pointer.
920 */
921int drm_mode_cursor2_ioctl(struct drm_device *dev,
922 void *data, struct drm_file *file_priv)
923{
924 struct drm_mode_cursor2 *req = data;
925
926 return drm_mode_cursor_common(dev, req, file_priv);
927}
928
929int drm_mode_page_flip_ioctl(struct drm_device *dev,
930 void *data, struct drm_file *file_priv)
931{
932 struct drm_mode_crtc_page_flip_target *page_flip = data;
933 struct drm_crtc *crtc;
934 struct drm_framebuffer *fb = NULL;
935 struct drm_pending_vblank_event *e = NULL;
936 u32 target_vblank = page_flip->sequence;
937 struct drm_modeset_acquire_ctx ctx;
938 int ret = -EINVAL;
939
940 if (!drm_core_check_feature(dev, DRIVER_MODESET))
941 return -EINVAL;
942
943 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS)
944 return -EINVAL;
945
946 if (page_flip->sequence != 0 && !(page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET))
947 return -EINVAL;
948
949 /* Only one of the DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags
950 * can be specified
951 */
952 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) == DRM_MODE_PAGE_FLIP_TARGET)
953 return -EINVAL;
954
955 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
956 return -EINVAL;
957
958 crtc = drm_crtc_find(dev, file_priv, page_flip->crtc_id);
959 if (!crtc)
960 return -ENOENT;
961
962 if (crtc->funcs->page_flip_target) {
963 u32 current_vblank;
964 int r;
965
966 r = drm_crtc_vblank_get(crtc);
967 if (r)
968 return r;
969
970 current_vblank = (u32)drm_crtc_vblank_count(crtc);
971
972 switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) {
973 case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE:
974 if ((int)(target_vblank - current_vblank) > 1) {
975 DRM_DEBUG("Invalid absolute flip target %u, "
976 "must be <= %u\n", target_vblank,
977 current_vblank + 1);
978 drm_crtc_vblank_put(crtc);
979 return -EINVAL;
980 }
981 break;
982 case DRM_MODE_PAGE_FLIP_TARGET_RELATIVE:
983 if (target_vblank != 0 && target_vblank != 1) {
984 DRM_DEBUG("Invalid relative flip target %u, "
985 "must be 0 or 1\n", target_vblank);
986 drm_crtc_vblank_put(crtc);
987 return -EINVAL;
988 }
989 target_vblank += current_vblank;
990 break;
991 default:
992 target_vblank = current_vblank +
993 !(page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC);
994 break;
995 }
996 } else if (crtc->funcs->page_flip == NULL ||
997 (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET)) {
998 return -EINVAL;
999 }
1000
1001 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1002retry:
1003 ret = drm_modeset_lock(&crtc->mutex, &ctx);
1004 if (ret)
1005 goto out;
1006 ret = drm_modeset_lock(&crtc->primary->mutex, &ctx);
1007 if (ret)
1008 goto out;
1009
1010 if (crtc->primary->fb == NULL) {
1011 /* The framebuffer is currently unbound, presumably
1012 * due to a hotplug event, that userspace has not
1013 * yet discovered.
1014 */
1015 ret = -EBUSY;
1016 goto out;
1017 }
1018
1019 fb = drm_framebuffer_lookup(dev, file_priv, page_flip->fb_id);
1020 if (!fb) {
1021 ret = -ENOENT;
1022 goto out;
1023 }
1024
1025 if (crtc->state) {
1026 const struct drm_plane_state *state = crtc->primary->state;
1027
1028 ret = drm_framebuffer_check_src_coords(state->src_x,
1029 state->src_y,
1030 state->src_w,
1031 state->src_h,
1032 fb);
1033 } else {
1034 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb);
1035 }
1036 if (ret)
1037 goto out;
1038
1039 if (crtc->primary->fb->format != fb->format) {
1040 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
1041 ret = -EINVAL;
1042 goto out;
1043 }
1044
1045 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1046 e = kzalloc(sizeof *e, GFP_KERNEL);
1047 if (!e) {
1048 ret = -ENOMEM;
1049 goto out;
1050 }
1051 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1052 e->event.base.length = sizeof(e->event);
1053 e->event.vbl.user_data = page_flip->user_data;
1054 e->event.vbl.crtc_id = crtc->base.id;
1055 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
1056 if (ret) {
1057 kfree(e);
1058 e = NULL;
1059 goto out;
1060 }
1061 }
1062
1063 crtc->primary->old_fb = crtc->primary->fb;
1064 if (crtc->funcs->page_flip_target)
1065 ret = crtc->funcs->page_flip_target(crtc, fb, e,
1066 page_flip->flags,
1067 target_vblank,
1068 &ctx);
1069 else
1070 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags,
1071 &ctx);
1072 if (ret) {
1073 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT)
1074 drm_event_cancel_free(dev, &e->base);
1075 /* Keep the old fb, don't unref it. */
1076 crtc->primary->old_fb = NULL;
1077 } else {
1078 crtc->primary->fb = fb;
1079 /* Unref only the old framebuffer. */
1080 fb = NULL;
1081 }
1082
1083out:
1084 if (fb)
1085 drm_framebuffer_put(fb);
1086 if (crtc->primary->old_fb)
1087 drm_framebuffer_put(crtc->primary->old_fb);
1088 crtc->primary->old_fb = NULL;
1089
1090 if (ret == -EDEADLK) {
1091 ret = drm_modeset_backoff(&ctx);
1092 if (!ret)
1093 goto retry;
1094 }
1095
1096 drm_modeset_drop_locks(&ctx);
1097 drm_modeset_acquire_fini(&ctx);
1098
1099 if (ret && crtc->funcs->page_flip_target)
1100 drm_crtc_vblank_put(crtc);
1101
1102 return ret;
1103}