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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/export.h>
24#include <linux/slab.h>
25#include <linux/uaccess.h>
26
27#include <drm/drm_plane.h>
28#include <drm/drm_drv.h>
29#include <drm/drm_print.h>
30#include <drm/drm_framebuffer.h>
31#include <drm/drm_file.h>
32#include <drm/drm_crtc.h>
33#include <drm/drm_fourcc.h>
34#include <drm/drm_managed.h>
35#include <drm/drm_vblank.h>
36
37#include "drm_crtc_internal.h"
38
39/**
40 * DOC: overview
41 *
42 * A plane represents an image source that can be blended with or overlaid on
43 * top of a CRTC during the scanout process. Planes take their input data from a
44 * &drm_framebuffer object. The plane itself specifies the cropping and scaling
45 * of that image, and where it is placed on the visible area of a display
46 * pipeline, represented by &drm_crtc. A plane can also have additional
47 * properties that specify how the pixels are positioned and blended, like
48 * rotation or Z-position. All these properties are stored in &drm_plane_state.
49 *
50 * Unless explicitly specified (via CRTC property or otherwise), the active area
51 * of a CRTC will be black by default. This means portions of the active area
52 * which are not covered by a plane will be black, and alpha blending of any
53 * planes with the CRTC background will blend with black at the lowest zpos.
54 *
55 * To create a plane, a KMS drivers allocates and zeroes an instances of
56 * &struct drm_plane (possibly as part of a larger structure) and registers it
57 * with a call to drm_universal_plane_init().
58 *
59 * Each plane has a type, see enum drm_plane_type. A plane can be compatible
60 * with multiple CRTCs, see &drm_plane.possible_crtcs.
61 *
62 * Each CRTC must have a unique primary plane userspace can attach to enable
63 * the CRTC. In other words, userspace must be able to attach a different
64 * primary plane to each CRTC at the same time. Primary planes can still be
65 * compatible with multiple CRTCs. There must be exactly as many primary planes
66 * as there are CRTCs.
67 *
68 * Legacy uAPI doesn't expose the primary and cursor planes directly. DRM core
69 * relies on the driver to set the primary and optionally the cursor plane used
70 * for legacy IOCTLs. This is done by calling drm_crtc_init_with_planes(). All
71 * drivers must provide one primary plane per CRTC to avoid surprising legacy
72 * userspace too much.
73 */
74
75/**
76 * DOC: standard plane properties
77 *
78 * DRM planes have a few standardized properties:
79 *
80 * type:
81 * Immutable property describing the type of the plane.
82 *
83 * For user-space which has enabled the &DRM_CLIENT_CAP_ATOMIC capability,
84 * the plane type is just a hint and is mostly superseded by atomic
85 * test-only commits. The type hint can still be used to come up more
86 * easily with a plane configuration accepted by the driver.
87 *
88 * The value of this property can be one of the following:
89 *
90 * "Primary":
91 * To light up a CRTC, attaching a primary plane is the most likely to
92 * work if it covers the whole CRTC and doesn't have scaling or
93 * cropping set up.
94 *
95 * Drivers may support more features for the primary plane, user-space
96 * can find out with test-only atomic commits.
97 *
98 * Some primary planes are implicitly used by the kernel in the legacy
99 * IOCTLs &DRM_IOCTL_MODE_SETCRTC and &DRM_IOCTL_MODE_PAGE_FLIP.
100 * Therefore user-space must not mix explicit usage of any primary
101 * plane (e.g. through an atomic commit) with these legacy IOCTLs.
102 *
103 * "Cursor":
104 * To enable this plane, using a framebuffer configured without scaling
105 * or cropping and with the following properties is the most likely to
106 * work:
107 *
108 * - If the driver provides the capabilities &DRM_CAP_CURSOR_WIDTH and
109 * &DRM_CAP_CURSOR_HEIGHT, create the framebuffer with this size.
110 * Otherwise, create a framebuffer with the size 64x64.
111 * - If the driver doesn't support modifiers, create a framebuffer with
112 * a linear layout. Otherwise, use the IN_FORMATS plane property.
113 *
114 * Drivers may support more features for the cursor plane, user-space
115 * can find out with test-only atomic commits.
116 *
117 * Some cursor planes are implicitly used by the kernel in the legacy
118 * IOCTLs &DRM_IOCTL_MODE_CURSOR and &DRM_IOCTL_MODE_CURSOR2.
119 * Therefore user-space must not mix explicit usage of any cursor
120 * plane (e.g. through an atomic commit) with these legacy IOCTLs.
121 *
122 * Some drivers may support cursors even if no cursor plane is exposed.
123 * In this case, the legacy cursor IOCTLs can be used to configure the
124 * cursor.
125 *
126 * "Overlay":
127 * Neither primary nor cursor.
128 *
129 * Overlay planes are the only planes exposed when the
130 * &DRM_CLIENT_CAP_UNIVERSAL_PLANES capability is disabled.
131 *
132 * IN_FORMATS:
133 * Blob property which contains the set of buffer format and modifier
134 * pairs supported by this plane. The blob is a struct
135 * drm_format_modifier_blob. Without this property the plane doesn't
136 * support buffers with modifiers. Userspace cannot change this property.
137 *
138 * Note that userspace can check the &DRM_CAP_ADDFB2_MODIFIERS driver
139 * capability for general modifier support. If this flag is set then every
140 * plane will have the IN_FORMATS property, even when it only supports
141 * DRM_FORMAT_MOD_LINEAR. Before linux kernel release v5.1 there have been
142 * various bugs in this area with inconsistencies between the capability
143 * flag and per-plane properties.
144 *
145 * IN_FORMATS_ASYNC:
146 * Blob property which contains the set of buffer format and modifier
147 * pairs supported by this plane for asynchronous flips. The blob is a struct
148 * drm_format_modifier_blob. Userspace cannot change this property. This is an
149 * optional property and if not present then user should expect a failure in
150 * atomic ioctl when the modifier/format is not supported by that plane under
151 * asynchronous flip.
152 *
153 * SIZE_HINTS:
154 * Blob property which contains the set of recommended plane size
155 * which can used for simple "cursor like" use cases (eg. no scaling).
156 * Using these hints frees userspace from extensive probing of
157 * supported plane sizes through atomic/setcursor ioctls.
158 *
159 * The blob contains an array of struct drm_plane_size_hint, in
160 * order of preference. For optimal usage userspace should pick
161 * the first size that satisfies its own requirements.
162 *
163 * Drivers should only attach this property to planes that
164 * support a very limited set of sizes.
165 *
166 * Note that property value 0 (ie. no blob) is reserved for potential
167 * future use. Current userspace is expected to ignore the property
168 * if the value is 0, and fall back to some other means (eg.
169 * &DRM_CAP_CURSOR_WIDTH and &DRM_CAP_CURSOR_HEIGHT) to determine
170 * the appropriate plane size to use.
171 */
172
173static unsigned int drm_num_planes(struct drm_device *dev)
174{
175 unsigned int num = 0;
176 struct drm_plane *tmp;
177
178 drm_for_each_plane(tmp, dev) {
179 num++;
180 }
181
182 return num;
183}
184
185static inline u32 *
186formats_ptr(struct drm_format_modifier_blob *blob)
187{
188 return (u32 *)(((char *)blob) + blob->formats_offset);
189}
190
191static inline struct drm_format_modifier *
192modifiers_ptr(struct drm_format_modifier_blob *blob)
193{
194 return (struct drm_format_modifier *)(((char *)blob) + blob->modifiers_offset);
195}
196
197static struct drm_property_blob *create_in_format_blob(struct drm_device *dev,
198 struct drm_plane *plane,
199 bool (*format_mod_supported)
200 (struct drm_plane *plane,
201 u32 format,
202 u64 modifier))
203{
204 struct drm_property_blob *blob;
205 struct drm_format_modifier *mod;
206 size_t blob_size, formats_size, modifiers_size;
207 struct drm_format_modifier_blob *blob_data;
208 unsigned int i, j;
209
210 formats_size = sizeof(__u32) * plane->format_count;
211 if (WARN_ON(!formats_size)) {
212 /* 0 formats are never expected */
213 return ERR_PTR(-EINVAL);
214 }
215
216 modifiers_size =
217 sizeof(struct drm_format_modifier) * plane->modifier_count;
218
219 blob_size = sizeof(struct drm_format_modifier_blob);
220 /* Modifiers offset is a pointer to a struct with a 64 bit field so it
221 * should be naturally aligned to 8B.
222 */
223 BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8);
224 blob_size += ALIGN(formats_size, 8);
225 blob_size += modifiers_size;
226
227 blob = drm_property_create_blob(dev, blob_size, NULL);
228 if (IS_ERR(blob))
229 return blob;
230
231 blob_data = blob->data;
232 blob_data->version = FORMAT_BLOB_CURRENT;
233 blob_data->count_formats = plane->format_count;
234 blob_data->formats_offset = sizeof(struct drm_format_modifier_blob);
235 blob_data->count_modifiers = plane->modifier_count;
236
237 blob_data->modifiers_offset =
238 ALIGN(blob_data->formats_offset + formats_size, 8);
239
240 memcpy(formats_ptr(blob_data), plane->format_types, formats_size);
241
242 mod = modifiers_ptr(blob_data);
243 for (i = 0; i < plane->modifier_count; i++) {
244 for (j = 0; j < plane->format_count; j++) {
245 if (!format_mod_supported ||
246 format_mod_supported(plane,
247 plane->format_types[j],
248 plane->modifiers[i])) {
249 mod->formats |= 1ULL << j;
250 }
251 }
252
253 mod->modifier = plane->modifiers[i];
254 mod->offset = 0;
255 mod->pad = 0;
256 mod++;
257 }
258
259 return blob;
260}
261
262/**
263 * DOC: hotspot properties
264 *
265 * HOTSPOT_X: property to set mouse hotspot x offset.
266 * HOTSPOT_Y: property to set mouse hotspot y offset.
267 *
268 * When the plane is being used as a cursor image to display a mouse pointer,
269 * the "hotspot" is the offset within the cursor image where mouse events
270 * are expected to go.
271 *
272 * Positive values move the hotspot from the top-left corner of the cursor
273 * plane towards the right and bottom.
274 *
275 * Most display drivers do not need this information because the
276 * hotspot is not actually connected to anything visible on screen.
277 * However, this is necessary for display drivers like the para-virtualized
278 * drivers (eg qxl, vbox, virtio, vmwgfx), that are attached to a user console
279 * with a mouse pointer. Since these consoles are often being remoted over a
280 * network, they would otherwise have to wait to display the pointer movement to
281 * the user until a full network round-trip has occurred. New mouse events have
282 * to be sent from the user's console, over the network to the virtual input
283 * devices, forwarded to the desktop for processing, and then the cursor plane's
284 * position can be updated and sent back to the user's console over the network.
285 * Instead, with the hotspot information, the console can anticipate the new
286 * location, and draw the mouse cursor there before the confirmation comes in.
287 * To do that correctly, the user's console must be able predict how the
288 * desktop will process mouse events, which normally requires the desktop's
289 * mouse topology information, ie where each CRTC sits in the mouse coordinate
290 * space. This is typically sent to the para-virtualized drivers using some
291 * driver-specific method, and the driver then forwards it to the console by
292 * way of the virtual display device or hypervisor.
293 *
294 * The assumption is generally made that there is only one cursor plane being
295 * used this way at a time, and that the desktop is feeding all mouse devices
296 * into the same global pointer. Para-virtualized drivers that require this
297 * should only be exposing a single cursor plane, or find some other way
298 * to coordinate with a userspace desktop that supports multiple pointers.
299 * If the hotspot properties are set, the cursor plane is therefore assumed to be
300 * used only for displaying a mouse cursor image, and the position of the combined
301 * cursor plane + offset can therefore be used for coordinating with input from a
302 * mouse device.
303 *
304 * The cursor will then be drawn either at the location of the plane in the CRTC
305 * console, or as a free-floating cursor plane on the user's console
306 * corresponding to their desktop mouse position.
307 *
308 * DRM clients which would like to work correctly on drivers which expose
309 * hotspot properties should advertise DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT.
310 * Setting this property on drivers which do not special case
311 * cursor planes will return EOPNOTSUPP, which can be used by userspace to
312 * gauge requirements of the hardware/drivers they're running on. Advertising
313 * DRM_CLIENT_CAP_CURSOR_PLANE_HOTSPOT implies that the userspace client will be
314 * correctly setting the hotspot properties.
315 */
316
317/**
318 * drm_plane_create_hotspot_properties - creates the mouse hotspot
319 * properties and attaches them to the given cursor plane
320 *
321 * @plane: drm cursor plane
322 *
323 * This function enables the mouse hotspot property on a given
324 * cursor plane. Look at the documentation for hotspot properties
325 * to get a better understanding for what they're used for.
326 *
327 * RETURNS:
328 * Zero for success or -errno
329 */
330static int drm_plane_create_hotspot_properties(struct drm_plane *plane)
331{
332 struct drm_property *prop_x;
333 struct drm_property *prop_y;
334
335 drm_WARN_ON(plane->dev,
336 !drm_core_check_feature(plane->dev,
337 DRIVER_CURSOR_HOTSPOT));
338
339 prop_x = drm_property_create_signed_range(plane->dev, 0, "HOTSPOT_X",
340 INT_MIN, INT_MAX);
341 if (!prop_x)
342 return -ENOMEM;
343
344 prop_y = drm_property_create_signed_range(plane->dev, 0, "HOTSPOT_Y",
345 INT_MIN, INT_MAX);
346 if (!prop_y) {
347 drm_property_destroy(plane->dev, prop_x);
348 return -ENOMEM;
349 }
350
351 drm_object_attach_property(&plane->base, prop_x, 0);
352 drm_object_attach_property(&plane->base, prop_y, 0);
353 plane->hotspot_x_property = prop_x;
354 plane->hotspot_y_property = prop_y;
355
356 return 0;
357}
358
359__printf(9, 0)
360static int __drm_universal_plane_init(struct drm_device *dev,
361 struct drm_plane *plane,
362 uint32_t possible_crtcs,
363 const struct drm_plane_funcs *funcs,
364 const uint32_t *formats,
365 unsigned int format_count,
366 const uint64_t *format_modifiers,
367 enum drm_plane_type type,
368 const char *name, va_list ap)
369{
370 struct drm_mode_config *config = &dev->mode_config;
371 struct drm_property_blob *blob;
372 static const uint64_t default_modifiers[] = {
373 DRM_FORMAT_MOD_LINEAR,
374 };
375 unsigned int format_modifier_count = 0;
376 int ret;
377
378 /* plane index is used with 32bit bitmasks */
379 if (WARN_ON(config->num_total_plane >= 32))
380 return -EINVAL;
381
382 /*
383 * First driver to need more than 64 formats needs to fix this. Each
384 * format is encoded as a bit and the current code only supports a u64.
385 */
386 if (WARN_ON(format_count > 64))
387 return -EINVAL;
388
389 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
390 (!funcs->atomic_destroy_state ||
391 !funcs->atomic_duplicate_state));
392
393 ret = drm_mode_object_add(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
394 if (ret)
395 return ret;
396
397 drm_modeset_lock_init(&plane->mutex);
398
399 plane->base.properties = &plane->properties;
400 plane->dev = dev;
401 plane->funcs = funcs;
402 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
403 GFP_KERNEL);
404 if (!plane->format_types) {
405 DRM_DEBUG_KMS("out of memory when allocating plane\n");
406 drm_mode_object_unregister(dev, &plane->base);
407 return -ENOMEM;
408 }
409
410 if (format_modifiers) {
411 const uint64_t *temp_modifiers = format_modifiers;
412
413 while (*temp_modifiers++ != DRM_FORMAT_MOD_INVALID)
414 format_modifier_count++;
415 } else {
416 if (!dev->mode_config.fb_modifiers_not_supported) {
417 format_modifiers = default_modifiers;
418 format_modifier_count = ARRAY_SIZE(default_modifiers);
419 }
420 }
421
422 /* autoset the cap and check for consistency across all planes */
423 drm_WARN_ON(dev, config->fb_modifiers_not_supported &&
424 format_modifier_count);
425
426 plane->modifier_count = format_modifier_count;
427 plane->modifiers = kmalloc_array(format_modifier_count,
428 sizeof(*plane->modifiers),
429 GFP_KERNEL);
430
431 if (format_modifier_count && !plane->modifiers) {
432 DRM_DEBUG_KMS("out of memory when allocating plane\n");
433 kfree(plane->format_types);
434 drm_mode_object_unregister(dev, &plane->base);
435 return -ENOMEM;
436 }
437
438 if (name) {
439 plane->name = kvasprintf(GFP_KERNEL, name, ap);
440 } else {
441 plane->name = kasprintf(GFP_KERNEL, "plane-%d",
442 drm_num_planes(dev));
443 }
444 if (!plane->name) {
445 kfree(plane->format_types);
446 kfree(plane->modifiers);
447 drm_mode_object_unregister(dev, &plane->base);
448 return -ENOMEM;
449 }
450
451 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
452 plane->format_count = format_count;
453 memcpy(plane->modifiers, format_modifiers,
454 format_modifier_count * sizeof(format_modifiers[0]));
455 plane->possible_crtcs = possible_crtcs;
456 plane->type = type;
457
458 list_add_tail(&plane->head, &config->plane_list);
459 plane->index = config->num_total_plane++;
460
461 drm_object_attach_property(&plane->base,
462 config->plane_type_property,
463 plane->type);
464
465 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
466 drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
467 drm_object_attach_property(&plane->base, config->prop_in_fence_fd, -1);
468 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
469 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
470 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
471 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
472 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
473 drm_object_attach_property(&plane->base, config->prop_src_x, 0);
474 drm_object_attach_property(&plane->base, config->prop_src_y, 0);
475 drm_object_attach_property(&plane->base, config->prop_src_w, 0);
476 drm_object_attach_property(&plane->base, config->prop_src_h, 0);
477 }
478 if (drm_core_check_feature(dev, DRIVER_CURSOR_HOTSPOT) &&
479 type == DRM_PLANE_TYPE_CURSOR) {
480 drm_plane_create_hotspot_properties(plane);
481 }
482
483 if (format_modifier_count) {
484 blob = create_in_format_blob(dev, plane,
485 plane->funcs->format_mod_supported);
486 if (!IS_ERR(blob))
487 drm_object_attach_property(&plane->base,
488 config->modifiers_property,
489 blob->base.id);
490 }
491
492 if (plane->funcs->format_mod_supported_async) {
493 blob = create_in_format_blob(dev, plane,
494 plane->funcs->format_mod_supported_async);
495 if (!IS_ERR(blob))
496 drm_object_attach_property(&plane->base,
497 config->async_modifiers_property,
498 blob->base.id);
499 }
500
501
502 return 0;
503}
504
505/**
506 * drm_universal_plane_init - Initialize a new universal plane object
507 * @dev: DRM device
508 * @plane: plane object to init
509 * @possible_crtcs: bitmask of possible CRTCs
510 * @funcs: callbacks for the new plane
511 * @formats: array of supported formats (DRM_FORMAT\_\*)
512 * @format_count: number of elements in @formats
513 * @format_modifiers: array of struct drm_format modifiers terminated by
514 * DRM_FORMAT_MOD_INVALID
515 * @type: type of plane (overlay, primary, cursor)
516 * @name: printf style format string for the plane name, or NULL for default name
517 *
518 * Initializes a plane object of type @type. The &drm_plane_funcs.destroy hook
519 * should call drm_plane_cleanup() and kfree() the plane structure. The plane
520 * structure should not be allocated with devm_kzalloc().
521 *
522 * Note: consider using drmm_universal_plane_alloc() instead of
523 * drm_universal_plane_init() to let the DRM managed resource infrastructure
524 * take care of cleanup and deallocation.
525 *
526 * Drivers that only support the DRM_FORMAT_MOD_LINEAR modifier support may set
527 * @format_modifiers to NULL. The plane will advertise the linear modifier.
528 *
529 * Returns:
530 * Zero on success, error code on failure.
531 */
532int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
533 uint32_t possible_crtcs,
534 const struct drm_plane_funcs *funcs,
535 const uint32_t *formats, unsigned int format_count,
536 const uint64_t *format_modifiers,
537 enum drm_plane_type type,
538 const char *name, ...)
539{
540 va_list ap;
541 int ret;
542
543 WARN_ON(!funcs->destroy);
544
545 va_start(ap, name);
546 ret = __drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
547 formats, format_count, format_modifiers,
548 type, name, ap);
549 va_end(ap);
550 return ret;
551}
552EXPORT_SYMBOL(drm_universal_plane_init);
553
554static void drmm_universal_plane_alloc_release(struct drm_device *dev, void *ptr)
555{
556 struct drm_plane *plane = ptr;
557
558 if (WARN_ON(!plane->dev))
559 return;
560
561 drm_plane_cleanup(plane);
562}
563
564void *__drmm_universal_plane_alloc(struct drm_device *dev, size_t size,
565 size_t offset, uint32_t possible_crtcs,
566 const struct drm_plane_funcs *funcs,
567 const uint32_t *formats, unsigned int format_count,
568 const uint64_t *format_modifiers,
569 enum drm_plane_type type,
570 const char *name, ...)
571{
572 void *container;
573 struct drm_plane *plane;
574 va_list ap;
575 int ret;
576
577 if (WARN_ON(!funcs || funcs->destroy))
578 return ERR_PTR(-EINVAL);
579
580 container = drmm_kzalloc(dev, size, GFP_KERNEL);
581 if (!container)
582 return ERR_PTR(-ENOMEM);
583
584 plane = container + offset;
585
586 va_start(ap, name);
587 ret = __drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
588 formats, format_count, format_modifiers,
589 type, name, ap);
590 va_end(ap);
591 if (ret)
592 return ERR_PTR(ret);
593
594 ret = drmm_add_action_or_reset(dev, drmm_universal_plane_alloc_release,
595 plane);
596 if (ret)
597 return ERR_PTR(ret);
598
599 return container;
600}
601EXPORT_SYMBOL(__drmm_universal_plane_alloc);
602
603void *__drm_universal_plane_alloc(struct drm_device *dev, size_t size,
604 size_t offset, uint32_t possible_crtcs,
605 const struct drm_plane_funcs *funcs,
606 const uint32_t *formats, unsigned int format_count,
607 const uint64_t *format_modifiers,
608 enum drm_plane_type type,
609 const char *name, ...)
610{
611 void *container;
612 struct drm_plane *plane;
613 va_list ap;
614 int ret;
615
616 if (drm_WARN_ON(dev, !funcs))
617 return ERR_PTR(-EINVAL);
618
619 container = kzalloc(size, GFP_KERNEL);
620 if (!container)
621 return ERR_PTR(-ENOMEM);
622
623 plane = container + offset;
624
625 va_start(ap, name);
626 ret = __drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
627 formats, format_count, format_modifiers,
628 type, name, ap);
629 va_end(ap);
630 if (ret)
631 goto err_kfree;
632
633 return container;
634
635err_kfree:
636 kfree(container);
637 return ERR_PTR(ret);
638}
639EXPORT_SYMBOL(__drm_universal_plane_alloc);
640
641int drm_plane_register_all(struct drm_device *dev)
642{
643 unsigned int num_planes = 0;
644 unsigned int num_zpos = 0;
645 struct drm_plane *plane;
646 int ret = 0;
647
648 drm_for_each_plane(plane, dev) {
649 if (plane->funcs->late_register)
650 ret = plane->funcs->late_register(plane);
651 if (ret)
652 return ret;
653
654 if (plane->zpos_property)
655 num_zpos++;
656 num_planes++;
657 }
658
659 drm_WARN(dev, num_zpos && num_planes != num_zpos,
660 "Mixing planes with and without zpos property is invalid\n");
661
662 return 0;
663}
664
665void drm_plane_unregister_all(struct drm_device *dev)
666{
667 struct drm_plane *plane;
668
669 drm_for_each_plane(plane, dev) {
670 if (plane->funcs->early_unregister)
671 plane->funcs->early_unregister(plane);
672 }
673}
674
675/**
676 * drm_plane_cleanup - Clean up the core plane usage
677 * @plane: plane to cleanup
678 *
679 * This function cleans up @plane and removes it from the DRM mode setting
680 * core. Note that the function does *not* free the plane structure itself,
681 * this is the responsibility of the caller.
682 */
683void drm_plane_cleanup(struct drm_plane *plane)
684{
685 struct drm_device *dev = plane->dev;
686
687 drm_modeset_lock_fini(&plane->mutex);
688
689 kfree(plane->format_types);
690 kfree(plane->modifiers);
691 drm_mode_object_unregister(dev, &plane->base);
692
693 BUG_ON(list_empty(&plane->head));
694
695 /* Note that the plane_list is considered to be static; should we
696 * remove the drm_plane at runtime we would have to decrement all
697 * the indices on the drm_plane after us in the plane_list.
698 */
699
700 list_del(&plane->head);
701 dev->mode_config.num_total_plane--;
702
703 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
704 if (plane->state && plane->funcs->atomic_destroy_state)
705 plane->funcs->atomic_destroy_state(plane, plane->state);
706
707 kfree(plane->name);
708
709 memset(plane, 0, sizeof(*plane));
710}
711EXPORT_SYMBOL(drm_plane_cleanup);
712
713/**
714 * drm_plane_from_index - find the registered plane at an index
715 * @dev: DRM device
716 * @idx: index of registered plane to find for
717 *
718 * Given a plane index, return the registered plane from DRM device's
719 * list of planes with matching index. This is the inverse of drm_plane_index().
720 */
721struct drm_plane *
722drm_plane_from_index(struct drm_device *dev, int idx)
723{
724 struct drm_plane *plane;
725
726 drm_for_each_plane(plane, dev)
727 if (idx == plane->index)
728 return plane;
729
730 return NULL;
731}
732EXPORT_SYMBOL(drm_plane_from_index);
733
734/**
735 * drm_plane_force_disable - Forcibly disable a plane
736 * @plane: plane to disable
737 *
738 * Forces the plane to be disabled.
739 *
740 * Used when the plane's current framebuffer is destroyed,
741 * and when restoring fbdev mode.
742 *
743 * Note that this function is not suitable for atomic drivers, since it doesn't
744 * wire through the lock acquisition context properly and hence can't handle
745 * retries or driver private locks. You probably want to use
746 * drm_atomic_helper_disable_plane() or
747 * drm_atomic_helper_disable_planes_on_crtc() instead.
748 */
749void drm_plane_force_disable(struct drm_plane *plane)
750{
751 int ret;
752
753 if (!plane->fb)
754 return;
755
756 WARN_ON(drm_drv_uses_atomic_modeset(plane->dev));
757
758 plane->old_fb = plane->fb;
759 ret = plane->funcs->disable_plane(plane, NULL);
760 if (ret) {
761 DRM_ERROR("failed to disable plane with busy fb\n");
762 plane->old_fb = NULL;
763 return;
764 }
765 /* disconnect the plane from the fb and crtc: */
766 drm_framebuffer_put(plane->old_fb);
767 plane->old_fb = NULL;
768 plane->fb = NULL;
769 plane->crtc = NULL;
770}
771EXPORT_SYMBOL(drm_plane_force_disable);
772
773/**
774 * drm_mode_plane_set_obj_prop - set the value of a property
775 * @plane: drm plane object to set property value for
776 * @property: property to set
777 * @value: value the property should be set to
778 *
779 * This functions sets a given property on a given plane object. This function
780 * calls the driver's ->set_property callback and changes the software state of
781 * the property if the callback succeeds.
782 *
783 * Returns:
784 * Zero on success, error code on failure.
785 */
786int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
787 struct drm_property *property,
788 uint64_t value)
789{
790 int ret = -EINVAL;
791 struct drm_mode_object *obj = &plane->base;
792
793 if (plane->funcs->set_property)
794 ret = plane->funcs->set_property(plane, property, value);
795 if (!ret)
796 drm_object_property_set_value(obj, property, value);
797
798 return ret;
799}
800EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
801
802int drm_mode_getplane_res(struct drm_device *dev, void *data,
803 struct drm_file *file_priv)
804{
805 struct drm_mode_get_plane_res *plane_resp = data;
806 struct drm_plane *plane;
807 uint32_t __user *plane_ptr;
808 int count = 0;
809
810 if (!drm_core_check_feature(dev, DRIVER_MODESET))
811 return -EOPNOTSUPP;
812
813 plane_ptr = u64_to_user_ptr(plane_resp->plane_id_ptr);
814
815 /*
816 * This ioctl is called twice, once to determine how much space is
817 * needed, and the 2nd time to fill it.
818 */
819 drm_for_each_plane(plane, dev) {
820 /*
821 * Unless userspace set the 'universal planes'
822 * capability bit, only advertise overlays.
823 */
824 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
825 !file_priv->universal_planes)
826 continue;
827
828 /*
829 * If we're running on a virtualized driver then,
830 * unless userspace advertizes support for the
831 * virtualized cursor plane, disable cursor planes
832 * because they'll be broken due to missing cursor
833 * hotspot info.
834 */
835 if (plane->type == DRM_PLANE_TYPE_CURSOR &&
836 drm_core_check_feature(dev, DRIVER_CURSOR_HOTSPOT) &&
837 file_priv->atomic &&
838 !file_priv->supports_virtualized_cursor_plane)
839 continue;
840
841 if (drm_lease_held(file_priv, plane->base.id)) {
842 if (count < plane_resp->count_planes &&
843 put_user(plane->base.id, plane_ptr + count))
844 return -EFAULT;
845 count++;
846 }
847 }
848 plane_resp->count_planes = count;
849
850 return 0;
851}
852
853int drm_mode_getplane(struct drm_device *dev, void *data,
854 struct drm_file *file_priv)
855{
856 struct drm_mode_get_plane *plane_resp = data;
857 struct drm_plane *plane;
858 uint32_t __user *format_ptr;
859
860 if (!drm_core_check_feature(dev, DRIVER_MODESET))
861 return -EOPNOTSUPP;
862
863 plane = drm_plane_find(dev, file_priv, plane_resp->plane_id);
864 if (!plane)
865 return -ENOENT;
866
867 drm_modeset_lock(&plane->mutex, NULL);
868 if (plane->state && plane->state->crtc && drm_lease_held(file_priv, plane->state->crtc->base.id))
869 plane_resp->crtc_id = plane->state->crtc->base.id;
870 else if (!plane->state && plane->crtc && drm_lease_held(file_priv, plane->crtc->base.id))
871 plane_resp->crtc_id = plane->crtc->base.id;
872 else
873 plane_resp->crtc_id = 0;
874
875 if (plane->state && plane->state->fb)
876 plane_resp->fb_id = plane->state->fb->base.id;
877 else if (!plane->state && plane->fb)
878 plane_resp->fb_id = plane->fb->base.id;
879 else
880 plane_resp->fb_id = 0;
881 drm_modeset_unlock(&plane->mutex);
882
883 plane_resp->plane_id = plane->base.id;
884 plane_resp->possible_crtcs = drm_lease_filter_crtcs(file_priv,
885 plane->possible_crtcs);
886
887 plane_resp->gamma_size = 0;
888
889 /*
890 * This ioctl is called twice, once to determine how much space is
891 * needed, and the 2nd time to fill it.
892 */
893 if (plane->format_count &&
894 (plane_resp->count_format_types >= plane->format_count)) {
895 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
896 if (copy_to_user(format_ptr,
897 plane->format_types,
898 sizeof(uint32_t) * plane->format_count)) {
899 return -EFAULT;
900 }
901 }
902 plane_resp->count_format_types = plane->format_count;
903
904 return 0;
905}
906
907/**
908 * drm_plane_has_format - Check whether the plane supports this format and modifier combination
909 * @plane: drm plane
910 * @format: pixel format (DRM_FORMAT_*)
911 * @modifier: data layout modifier
912 *
913 * Returns:
914 * Whether the plane supports the specified format and modifier combination.
915 */
916bool drm_plane_has_format(struct drm_plane *plane,
917 u32 format, u64 modifier)
918{
919 unsigned int i;
920
921 for (i = 0; i < plane->format_count; i++) {
922 if (format == plane->format_types[i])
923 break;
924 }
925 if (i == plane->format_count)
926 return false;
927
928 if (plane->funcs->format_mod_supported) {
929 if (!plane->funcs->format_mod_supported(plane, format, modifier))
930 return false;
931 } else {
932 if (!plane->modifier_count)
933 return true;
934
935 for (i = 0; i < plane->modifier_count; i++) {
936 if (modifier == plane->modifiers[i])
937 break;
938 }
939 if (i == plane->modifier_count)
940 return false;
941 }
942
943 return true;
944}
945EXPORT_SYMBOL(drm_plane_has_format);
946
947static int __setplane_check(struct drm_plane *plane,
948 struct drm_crtc *crtc,
949 struct drm_framebuffer *fb,
950 int32_t crtc_x, int32_t crtc_y,
951 uint32_t crtc_w, uint32_t crtc_h,
952 uint32_t src_x, uint32_t src_y,
953 uint32_t src_w, uint32_t src_h)
954{
955 int ret;
956
957 /* Check whether this plane is usable on this CRTC */
958 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
959 DRM_DEBUG_KMS("Invalid crtc for plane\n");
960 return -EINVAL;
961 }
962
963 /* Check whether this plane supports the fb pixel format. */
964 if (!drm_plane_has_format(plane, fb->format->format, fb->modifier)) {
965 DRM_DEBUG_KMS("Invalid pixel format %p4cc, modifier 0x%llx\n",
966 &fb->format->format, fb->modifier);
967 return -EINVAL;
968 }
969
970 /* Give drivers some help against integer overflows */
971 if (crtc_w > INT_MAX ||
972 crtc_x > INT_MAX - (int32_t) crtc_w ||
973 crtc_h > INT_MAX ||
974 crtc_y > INT_MAX - (int32_t) crtc_h) {
975 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
976 crtc_w, crtc_h, crtc_x, crtc_y);
977 return -ERANGE;
978 }
979
980 ret = drm_framebuffer_check_src_coords(src_x, src_y, src_w, src_h, fb);
981 if (ret)
982 return ret;
983
984 return 0;
985}
986
987/**
988 * drm_any_plane_has_format - Check whether any plane supports this format and modifier combination
989 * @dev: DRM device
990 * @format: pixel format (DRM_FORMAT_*)
991 * @modifier: data layout modifier
992 *
993 * Returns:
994 * Whether at least one plane supports the specified format and modifier combination.
995 */
996bool drm_any_plane_has_format(struct drm_device *dev,
997 u32 format, u64 modifier)
998{
999 struct drm_plane *plane;
1000
1001 drm_for_each_plane(plane, dev) {
1002 if (drm_plane_has_format(plane, format, modifier))
1003 return true;
1004 }
1005
1006 return false;
1007}
1008EXPORT_SYMBOL(drm_any_plane_has_format);
1009
1010/*
1011 * __setplane_internal - setplane handler for internal callers
1012 *
1013 * This function will take a reference on the new fb for the plane
1014 * on success.
1015 *
1016 * src_{x,y,w,h} are provided in 16.16 fixed point format
1017 */
1018static int __setplane_internal(struct drm_plane *plane,
1019 struct drm_crtc *crtc,
1020 struct drm_framebuffer *fb,
1021 int32_t crtc_x, int32_t crtc_y,
1022 uint32_t crtc_w, uint32_t crtc_h,
1023 /* src_{x,y,w,h} values are 16.16 fixed point */
1024 uint32_t src_x, uint32_t src_y,
1025 uint32_t src_w, uint32_t src_h,
1026 struct drm_modeset_acquire_ctx *ctx)
1027{
1028 int ret = 0;
1029
1030 WARN_ON(drm_drv_uses_atomic_modeset(plane->dev));
1031
1032 /* No fb means shut it down */
1033 if (!fb) {
1034 plane->old_fb = plane->fb;
1035 ret = plane->funcs->disable_plane(plane, ctx);
1036 if (!ret) {
1037 plane->crtc = NULL;
1038 plane->fb = NULL;
1039 } else {
1040 plane->old_fb = NULL;
1041 }
1042 goto out;
1043 }
1044
1045 ret = __setplane_check(plane, crtc, fb,
1046 crtc_x, crtc_y, crtc_w, crtc_h,
1047 src_x, src_y, src_w, src_h);
1048 if (ret)
1049 goto out;
1050
1051 plane->old_fb = plane->fb;
1052 ret = plane->funcs->update_plane(plane, crtc, fb,
1053 crtc_x, crtc_y, crtc_w, crtc_h,
1054 src_x, src_y, src_w, src_h, ctx);
1055 if (!ret) {
1056 plane->crtc = crtc;
1057 plane->fb = fb;
1058 drm_framebuffer_get(plane->fb);
1059 } else {
1060 plane->old_fb = NULL;
1061 }
1062
1063out:
1064 if (plane->old_fb)
1065 drm_framebuffer_put(plane->old_fb);
1066 plane->old_fb = NULL;
1067
1068 return ret;
1069}
1070
1071static int __setplane_atomic(struct drm_plane *plane,
1072 struct drm_crtc *crtc,
1073 struct drm_framebuffer *fb,
1074 int32_t crtc_x, int32_t crtc_y,
1075 uint32_t crtc_w, uint32_t crtc_h,
1076 uint32_t src_x, uint32_t src_y,
1077 uint32_t src_w, uint32_t src_h,
1078 struct drm_modeset_acquire_ctx *ctx)
1079{
1080 int ret;
1081
1082 WARN_ON(!drm_drv_uses_atomic_modeset(plane->dev));
1083
1084 /* No fb means shut it down */
1085 if (!fb)
1086 return plane->funcs->disable_plane(plane, ctx);
1087
1088 /*
1089 * FIXME: This is redundant with drm_atomic_plane_check(),
1090 * but the legacy cursor/"async" .update_plane() tricks
1091 * don't call that so we still need this here. Should remove
1092 * this when all .update_plane() implementations have been
1093 * fixed to call drm_atomic_plane_check().
1094 */
1095 ret = __setplane_check(plane, crtc, fb,
1096 crtc_x, crtc_y, crtc_w, crtc_h,
1097 src_x, src_y, src_w, src_h);
1098 if (ret)
1099 return ret;
1100
1101 return plane->funcs->update_plane(plane, crtc, fb,
1102 crtc_x, crtc_y, crtc_w, crtc_h,
1103 src_x, src_y, src_w, src_h, ctx);
1104}
1105
1106static int setplane_internal(struct drm_plane *plane,
1107 struct drm_crtc *crtc,
1108 struct drm_framebuffer *fb,
1109 int32_t crtc_x, int32_t crtc_y,
1110 uint32_t crtc_w, uint32_t crtc_h,
1111 /* src_{x,y,w,h} values are 16.16 fixed point */
1112 uint32_t src_x, uint32_t src_y,
1113 uint32_t src_w, uint32_t src_h)
1114{
1115 struct drm_modeset_acquire_ctx ctx;
1116 int ret;
1117
1118 DRM_MODESET_LOCK_ALL_BEGIN(plane->dev, ctx,
1119 DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
1120
1121 if (drm_drv_uses_atomic_modeset(plane->dev))
1122 ret = __setplane_atomic(plane, crtc, fb,
1123 crtc_x, crtc_y, crtc_w, crtc_h,
1124 src_x, src_y, src_w, src_h, &ctx);
1125 else
1126 ret = __setplane_internal(plane, crtc, fb,
1127 crtc_x, crtc_y, crtc_w, crtc_h,
1128 src_x, src_y, src_w, src_h, &ctx);
1129
1130 DRM_MODESET_LOCK_ALL_END(plane->dev, ctx, ret);
1131
1132 return ret;
1133}
1134
1135int drm_mode_setplane(struct drm_device *dev, void *data,
1136 struct drm_file *file_priv)
1137{
1138 struct drm_mode_set_plane *plane_req = data;
1139 struct drm_plane *plane;
1140 struct drm_crtc *crtc = NULL;
1141 struct drm_framebuffer *fb = NULL;
1142 int ret;
1143
1144 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1145 return -EOPNOTSUPP;
1146
1147 /*
1148 * First, find the plane, crtc, and fb objects. If not available,
1149 * we don't bother to call the driver.
1150 */
1151 plane = drm_plane_find(dev, file_priv, plane_req->plane_id);
1152 if (!plane) {
1153 DRM_DEBUG_KMS("Unknown plane ID %d\n",
1154 plane_req->plane_id);
1155 return -ENOENT;
1156 }
1157
1158 if (plane_req->fb_id) {
1159 fb = drm_framebuffer_lookup(dev, file_priv, plane_req->fb_id);
1160 if (!fb) {
1161 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
1162 plane_req->fb_id);
1163 return -ENOENT;
1164 }
1165
1166 crtc = drm_crtc_find(dev, file_priv, plane_req->crtc_id);
1167 if (!crtc) {
1168 drm_framebuffer_put(fb);
1169 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
1170 plane_req->crtc_id);
1171 return -ENOENT;
1172 }
1173 }
1174
1175 ret = setplane_internal(plane, crtc, fb,
1176 plane_req->crtc_x, plane_req->crtc_y,
1177 plane_req->crtc_w, plane_req->crtc_h,
1178 plane_req->src_x, plane_req->src_y,
1179 plane_req->src_w, plane_req->src_h);
1180
1181 if (fb)
1182 drm_framebuffer_put(fb);
1183
1184 return ret;
1185}
1186
1187static int drm_mode_cursor_universal(struct drm_crtc *crtc,
1188 struct drm_mode_cursor2 *req,
1189 struct drm_file *file_priv,
1190 struct drm_modeset_acquire_ctx *ctx)
1191{
1192 struct drm_device *dev = crtc->dev;
1193 struct drm_plane *plane = crtc->cursor;
1194 struct drm_framebuffer *fb = NULL;
1195 struct drm_mode_fb_cmd2 fbreq = {
1196 .width = req->width,
1197 .height = req->height,
1198 .pixel_format = DRM_FORMAT_ARGB8888,
1199 .pitches = { req->width * 4 },
1200 .handles = { req->handle },
1201 };
1202 int32_t crtc_x, crtc_y;
1203 uint32_t crtc_w = 0, crtc_h = 0;
1204 uint32_t src_w = 0, src_h = 0;
1205 int ret = 0;
1206
1207 BUG_ON(!plane);
1208 WARN_ON(plane->crtc != crtc && plane->crtc != NULL);
1209
1210 /*
1211 * Obtain fb we'll be using (either new or existing) and take an extra
1212 * reference to it if fb != null. setplane will take care of dropping
1213 * the reference if the plane update fails.
1214 */
1215 if (req->flags & DRM_MODE_CURSOR_BO) {
1216 if (req->handle) {
1217 fb = drm_internal_framebuffer_create(dev, &fbreq, file_priv);
1218 if (IS_ERR(fb)) {
1219 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
1220 return PTR_ERR(fb);
1221 }
1222
1223 if (plane->hotspot_x_property && plane->state)
1224 plane->state->hotspot_x = req->hot_x;
1225 if (plane->hotspot_y_property && plane->state)
1226 plane->state->hotspot_y = req->hot_y;
1227 } else {
1228 fb = NULL;
1229 }
1230 } else {
1231 if (plane->state)
1232 fb = plane->state->fb;
1233 else
1234 fb = plane->fb;
1235
1236 if (fb)
1237 drm_framebuffer_get(fb);
1238 }
1239
1240 if (req->flags & DRM_MODE_CURSOR_MOVE) {
1241 crtc_x = req->x;
1242 crtc_y = req->y;
1243 } else {
1244 crtc_x = crtc->cursor_x;
1245 crtc_y = crtc->cursor_y;
1246 }
1247
1248 if (fb) {
1249 crtc_w = fb->width;
1250 crtc_h = fb->height;
1251 src_w = fb->width << 16;
1252 src_h = fb->height << 16;
1253 }
1254
1255 if (drm_drv_uses_atomic_modeset(dev))
1256 ret = __setplane_atomic(plane, crtc, fb,
1257 crtc_x, crtc_y, crtc_w, crtc_h,
1258 0, 0, src_w, src_h, ctx);
1259 else
1260 ret = __setplane_internal(plane, crtc, fb,
1261 crtc_x, crtc_y, crtc_w, crtc_h,
1262 0, 0, src_w, src_h, ctx);
1263
1264 if (fb)
1265 drm_framebuffer_put(fb);
1266
1267 /* Update successful; save new cursor position, if necessary */
1268 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
1269 crtc->cursor_x = req->x;
1270 crtc->cursor_y = req->y;
1271 }
1272
1273 return ret;
1274}
1275
1276static int drm_mode_cursor_common(struct drm_device *dev,
1277 struct drm_mode_cursor2 *req,
1278 struct drm_file *file_priv)
1279{
1280 struct drm_crtc *crtc;
1281 struct drm_modeset_acquire_ctx ctx;
1282 int ret = 0;
1283
1284 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1285 return -EOPNOTSUPP;
1286
1287 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
1288 return -EINVAL;
1289
1290 crtc = drm_crtc_find(dev, file_priv, req->crtc_id);
1291 if (!crtc) {
1292 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
1293 return -ENOENT;
1294 }
1295
1296 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1297retry:
1298 ret = drm_modeset_lock(&crtc->mutex, &ctx);
1299 if (ret)
1300 goto out;
1301 /*
1302 * If this crtc has a universal cursor plane, call that plane's update
1303 * handler rather than using legacy cursor handlers.
1304 */
1305 if (crtc->cursor) {
1306 ret = drm_modeset_lock(&crtc->cursor->mutex, &ctx);
1307 if (ret)
1308 goto out;
1309
1310 if (!drm_lease_held(file_priv, crtc->cursor->base.id)) {
1311 ret = -EACCES;
1312 goto out;
1313 }
1314
1315 ret = drm_mode_cursor_universal(crtc, req, file_priv, &ctx);
1316 goto out;
1317 }
1318
1319 if (req->flags & DRM_MODE_CURSOR_BO) {
1320 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
1321 ret = -ENXIO;
1322 goto out;
1323 }
1324 /* Turns off the cursor if handle is 0 */
1325 if (crtc->funcs->cursor_set2)
1326 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
1327 req->width, req->height, req->hot_x, req->hot_y);
1328 else
1329 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
1330 req->width, req->height);
1331 }
1332
1333 if (req->flags & DRM_MODE_CURSOR_MOVE) {
1334 if (crtc->funcs->cursor_move) {
1335 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
1336 } else {
1337 ret = -EFAULT;
1338 goto out;
1339 }
1340 }
1341out:
1342 if (ret == -EDEADLK) {
1343 ret = drm_modeset_backoff(&ctx);
1344 if (!ret)
1345 goto retry;
1346 }
1347
1348 drm_modeset_drop_locks(&ctx);
1349 drm_modeset_acquire_fini(&ctx);
1350
1351 return ret;
1352
1353}
1354
1355
1356int drm_mode_cursor_ioctl(struct drm_device *dev,
1357 void *data, struct drm_file *file_priv)
1358{
1359 struct drm_mode_cursor *req = data;
1360 struct drm_mode_cursor2 new_req;
1361
1362 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
1363 new_req.hot_x = new_req.hot_y = 0;
1364
1365 return drm_mode_cursor_common(dev, &new_req, file_priv);
1366}
1367
1368/*
1369 * Set the cursor configuration based on user request. This implements the 2nd
1370 * version of the cursor ioctl, which allows userspace to additionally specify
1371 * the hotspot of the pointer.
1372 */
1373int drm_mode_cursor2_ioctl(struct drm_device *dev,
1374 void *data, struct drm_file *file_priv)
1375{
1376 struct drm_mode_cursor2 *req = data;
1377
1378 return drm_mode_cursor_common(dev, req, file_priv);
1379}
1380
1381int drm_mode_page_flip_ioctl(struct drm_device *dev,
1382 void *data, struct drm_file *file_priv)
1383{
1384 struct drm_mode_crtc_page_flip_target *page_flip = data;
1385 struct drm_crtc *crtc;
1386 struct drm_plane *plane;
1387 struct drm_framebuffer *fb = NULL, *old_fb;
1388 struct drm_pending_vblank_event *e = NULL;
1389 u32 target_vblank = page_flip->sequence;
1390 struct drm_modeset_acquire_ctx ctx;
1391 int ret = -EINVAL;
1392
1393 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1394 return -EOPNOTSUPP;
1395
1396 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS)
1397 return -EINVAL;
1398
1399 if (page_flip->sequence != 0 && !(page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET))
1400 return -EINVAL;
1401
1402 /* Only one of the DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags
1403 * can be specified
1404 */
1405 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) == DRM_MODE_PAGE_FLIP_TARGET)
1406 return -EINVAL;
1407
1408 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
1409 return -EINVAL;
1410
1411 crtc = drm_crtc_find(dev, file_priv, page_flip->crtc_id);
1412 if (!crtc)
1413 return -ENOENT;
1414
1415 plane = crtc->primary;
1416
1417 if (!drm_lease_held(file_priv, plane->base.id))
1418 return -EACCES;
1419
1420 if (crtc->funcs->page_flip_target) {
1421 u32 current_vblank;
1422 int r;
1423
1424 r = drm_crtc_vblank_get(crtc);
1425 if (r)
1426 return r;
1427
1428 current_vblank = (u32)drm_crtc_vblank_count(crtc);
1429
1430 switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) {
1431 case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE:
1432 if ((int)(target_vblank - current_vblank) > 1) {
1433 DRM_DEBUG("Invalid absolute flip target %u, "
1434 "must be <= %u\n", target_vblank,
1435 current_vblank + 1);
1436 drm_crtc_vblank_put(crtc);
1437 return -EINVAL;
1438 }
1439 break;
1440 case DRM_MODE_PAGE_FLIP_TARGET_RELATIVE:
1441 if (target_vblank != 0 && target_vblank != 1) {
1442 DRM_DEBUG("Invalid relative flip target %u, "
1443 "must be 0 or 1\n", target_vblank);
1444 drm_crtc_vblank_put(crtc);
1445 return -EINVAL;
1446 }
1447 target_vblank += current_vblank;
1448 break;
1449 default:
1450 target_vblank = current_vblank +
1451 !(page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC);
1452 break;
1453 }
1454 } else if (crtc->funcs->page_flip == NULL ||
1455 (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET)) {
1456 return -EINVAL;
1457 }
1458
1459 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1460retry:
1461 ret = drm_modeset_lock(&crtc->mutex, &ctx);
1462 if (ret)
1463 goto out;
1464 ret = drm_modeset_lock(&plane->mutex, &ctx);
1465 if (ret)
1466 goto out;
1467
1468 if (plane->state)
1469 old_fb = plane->state->fb;
1470 else
1471 old_fb = plane->fb;
1472
1473 if (old_fb == NULL) {
1474 /* The framebuffer is currently unbound, presumably
1475 * due to a hotplug event, that userspace has not
1476 * yet discovered.
1477 */
1478 ret = -EBUSY;
1479 goto out;
1480 }
1481
1482 fb = drm_framebuffer_lookup(dev, file_priv, page_flip->fb_id);
1483 if (!fb) {
1484 ret = -ENOENT;
1485 goto out;
1486 }
1487
1488 if (plane->state) {
1489 const struct drm_plane_state *state = plane->state;
1490
1491 ret = drm_framebuffer_check_src_coords(state->src_x,
1492 state->src_y,
1493 state->src_w,
1494 state->src_h,
1495 fb);
1496 } else {
1497 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y,
1498 &crtc->mode, fb);
1499 }
1500 if (ret)
1501 goto out;
1502
1503 /*
1504 * Only check the FOURCC format code, excluding modifiers. This is
1505 * enough for all legacy drivers. Atomic drivers have their own
1506 * checks in their ->atomic_check implementation, which will
1507 * return -EINVAL if any hw or driver constraint is violated due
1508 * to modifier changes.
1509 */
1510 if (old_fb->format->format != fb->format->format) {
1511 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
1512 ret = -EINVAL;
1513 goto out;
1514 }
1515
1516 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1517 e = kzalloc_obj(*e);
1518 if (!e) {
1519 ret = -ENOMEM;
1520 goto out;
1521 }
1522
1523 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1524 e->event.base.length = sizeof(e->event);
1525 e->event.vbl.user_data = page_flip->user_data;
1526 e->event.vbl.crtc_id = crtc->base.id;
1527
1528 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
1529 if (ret) {
1530 kfree(e);
1531 e = NULL;
1532 goto out;
1533 }
1534 }
1535
1536 plane->old_fb = plane->fb;
1537 if (crtc->funcs->page_flip_target)
1538 ret = crtc->funcs->page_flip_target(crtc, fb, e,
1539 page_flip->flags,
1540 target_vblank,
1541 &ctx);
1542 else
1543 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags,
1544 &ctx);
1545 if (ret) {
1546 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT)
1547 drm_event_cancel_free(dev, &e->base);
1548 /* Keep the old fb, don't unref it. */
1549 plane->old_fb = NULL;
1550 } else {
1551 if (!plane->state) {
1552 plane->fb = fb;
1553 drm_framebuffer_get(fb);
1554 }
1555 }
1556
1557out:
1558 if (fb)
1559 drm_framebuffer_put(fb);
1560 fb = NULL;
1561 if (plane->old_fb)
1562 drm_framebuffer_put(plane->old_fb);
1563 plane->old_fb = NULL;
1564
1565 if (ret == -EDEADLK) {
1566 ret = drm_modeset_backoff(&ctx);
1567 if (!ret)
1568 goto retry;
1569 }
1570
1571 drm_modeset_drop_locks(&ctx);
1572 drm_modeset_acquire_fini(&ctx);
1573
1574 if (ret && crtc->funcs->page_flip_target)
1575 drm_crtc_vblank_put(crtc);
1576
1577 return ret;
1578}
1579
1580/**
1581 * DOC: damage tracking
1582 *
1583 * FB_DAMAGE_CLIPS is an optional plane property which provides a means to
1584 * specify a list of damage rectangles on a plane in framebuffer coordinates of
1585 * the framebuffer attached to the plane. In current context damage is the area
1586 * of plane framebuffer that has changed since last plane update (also called
1587 * page-flip), irrespective of whether currently attached framebuffer is same as
1588 * framebuffer attached during last plane update or not.
1589 *
1590 * FB_DAMAGE_CLIPS is a hint to kernel which could be helpful for some drivers
1591 * to optimize internally especially for virtual devices where each framebuffer
1592 * change needs to be transmitted over network, usb, etc.
1593 *
1594 * Since FB_DAMAGE_CLIPS is a hint so it is an optional property. User-space can
1595 * ignore damage clips property and in that case driver will do a full plane
1596 * update. In case damage clips are provided then it is guaranteed that the area
1597 * inside damage clips will be updated to plane. For efficiency driver can do
1598 * full update or can update more than specified in damage clips. Since driver
1599 * is free to read more, user-space must always render the entire visible
1600 * framebuffer. Otherwise there can be corruptions. Also, if a user-space
1601 * provides damage clips which doesn't encompass the actual damage to
1602 * framebuffer (since last plane update) can result in incorrect rendering.
1603 *
1604 * FB_DAMAGE_CLIPS is a blob property with the layout of blob data is simply an
1605 * array of &drm_mode_rect. Unlike plane &drm_plane_state.src coordinates,
1606 * damage clips are not in 16.16 fixed point. Similar to plane src in
1607 * framebuffer, damage clips cannot be negative. In damage clip, x1/y1 are
1608 * inclusive and x2/y2 are exclusive. While kernel does not error for overlapped
1609 * damage clips, it is strongly discouraged.
1610 *
1611 * Drivers that are interested in damage interface for plane should enable
1612 * FB_DAMAGE_CLIPS property by calling drm_plane_enable_fb_damage_clips().
1613 * Drivers implementing damage can use drm_atomic_helper_damage_iter_init() and
1614 * drm_atomic_helper_damage_iter_next() helper iterator function to get damage
1615 * rectangles clipped to &drm_plane_state.src.
1616 *
1617 * Note that there are two types of damage handling: frame damage and buffer
1618 * damage, the type of damage handling implemented depends on a driver's upload
1619 * target. Drivers implementing a per-plane or per-CRTC upload target need to
1620 * handle frame damage, while drivers implementing a per-buffer upload target
1621 * need to handle buffer damage.
1622 *
1623 * The existing damage helpers only support the frame damage type, there is no
1624 * buffer age support or similar damage accumulation algorithm implemented yet.
1625 *
1626 * Only drivers handling frame damage can use the mentioned damage helpers to
1627 * iterate over the damaged regions. Drivers that handle buffer damage, must set
1628 * &drm_plane_state.ignore_damage_clips for drm_atomic_helper_damage_iter_init()
1629 * to know that damage clips should be ignored and return &drm_plane_state.src
1630 * as the damage rectangle, to force a full plane update.
1631 *
1632 * Drivers with a per-buffer upload target could compare the &drm_plane_state.fb
1633 * of the old and new plane states to determine if the framebuffer attached to a
1634 * plane has changed or not since the last plane update. If &drm_plane_state.fb
1635 * has changed, then &drm_plane_state.ignore_damage_clips must be set to true.
1636 *
1637 * That is because drivers with a per-plane upload target, expect the backing
1638 * storage buffer to not change for a given plane. If the upload buffer changes
1639 * between page flips, the new upload buffer has to be updated as a whole. This
1640 * can be improved in the future if support for frame damage is added to the DRM
1641 * damage helpers, similarly to how user-space already handle this case as it is
1642 * explained in the following documents:
1643 *
1644 * https://registry.khronos.org/EGL/extensions/KHR/EGL_KHR_swap_buffers_with_damage.txt
1645 * https://emersion.fr/blog/2019/intro-to-damage-tracking/
1646 */
1647
1648/**
1649 * drm_plane_enable_fb_damage_clips - Enables plane fb damage clips property.
1650 * @plane: Plane on which to enable damage clips property.
1651 *
1652 * This function lets driver to enable the damage clips property on a plane.
1653 */
1654void drm_plane_enable_fb_damage_clips(struct drm_plane *plane)
1655{
1656 struct drm_device *dev = plane->dev;
1657 struct drm_mode_config *config = &dev->mode_config;
1658
1659 drm_object_attach_property(&plane->base, config->prop_fb_damage_clips,
1660 0);
1661}
1662EXPORT_SYMBOL(drm_plane_enable_fb_damage_clips);
1663
1664/**
1665 * drm_plane_get_damage_clips_count - Returns damage clips count.
1666 * @state: Plane state.
1667 *
1668 * Simple helper to get the number of &drm_mode_rect clips set by user-space
1669 * during plane update.
1670 *
1671 * Return: Number of clips in plane fb_damage_clips blob property.
1672 */
1673unsigned int
1674drm_plane_get_damage_clips_count(const struct drm_plane_state *state)
1675{
1676 return (state && state->fb_damage_clips) ?
1677 state->fb_damage_clips->length/sizeof(struct drm_mode_rect) : 0;
1678}
1679EXPORT_SYMBOL(drm_plane_get_damage_clips_count);
1680
1681struct drm_mode_rect *
1682__drm_plane_get_damage_clips(const struct drm_plane_state *state)
1683{
1684 return (struct drm_mode_rect *)((state && state->fb_damage_clips) ?
1685 state->fb_damage_clips->data : NULL);
1686}
1687
1688/**
1689 * drm_plane_get_damage_clips - Returns damage clips.
1690 * @state: Plane state.
1691 *
1692 * Note that this function returns uapi type &drm_mode_rect. Drivers might want
1693 * to use the helper functions drm_atomic_helper_damage_iter_init() and
1694 * drm_atomic_helper_damage_iter_next() or drm_atomic_helper_damage_merged() if
1695 * the driver can only handle a single damage region at most.
1696 *
1697 * Return: Damage clips in plane fb_damage_clips blob property.
1698 */
1699struct drm_mode_rect *
1700drm_plane_get_damage_clips(const struct drm_plane_state *state)
1701{
1702 struct drm_device *dev = state->plane->dev;
1703 struct drm_mode_config *config = &dev->mode_config;
1704
1705 /* check that drm_plane_enable_fb_damage_clips() was called */
1706 if (!drm_mode_obj_find_prop_id(&state->plane->base,
1707 config->prop_fb_damage_clips->base.id))
1708 drm_warn_once(dev, "drm_plane_enable_fb_damage_clips() not called\n");
1709
1710 return __drm_plane_get_damage_clips(state);
1711}
1712EXPORT_SYMBOL(drm_plane_get_damage_clips);
1713
1714struct drm_property *
1715drm_create_scaling_filter_prop(struct drm_device *dev,
1716 unsigned int supported_filters)
1717{
1718 struct drm_property *prop;
1719 static const struct drm_prop_enum_list props[] = {
1720 { DRM_SCALING_FILTER_DEFAULT, "Default" },
1721 { DRM_SCALING_FILTER_NEAREST_NEIGHBOR, "Nearest Neighbor" },
1722 };
1723 unsigned int valid_mode_mask = BIT(DRM_SCALING_FILTER_DEFAULT) |
1724 BIT(DRM_SCALING_FILTER_NEAREST_NEIGHBOR);
1725 int i;
1726
1727 if (WARN_ON((supported_filters & ~valid_mode_mask) ||
1728 ((supported_filters & BIT(DRM_SCALING_FILTER_DEFAULT)) == 0)))
1729 return ERR_PTR(-EINVAL);
1730
1731 prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
1732 "SCALING_FILTER",
1733 hweight32(supported_filters));
1734 if (!prop)
1735 return ERR_PTR(-ENOMEM);
1736
1737 for (i = 0; i < ARRAY_SIZE(props); i++) {
1738 int ret;
1739
1740 if (!(BIT(props[i].type) & supported_filters))
1741 continue;
1742
1743 ret = drm_property_add_enum(prop, props[i].type,
1744 props[i].name);
1745
1746 if (ret) {
1747 drm_property_destroy(dev, prop);
1748
1749 return ERR_PTR(ret);
1750 }
1751 }
1752
1753 return prop;
1754}
1755
1756/**
1757 * drm_plane_create_scaling_filter_property - create a new scaling filter
1758 * property
1759 *
1760 * @plane: drm plane
1761 * @supported_filters: bitmask of supported scaling filters, must include
1762 * BIT(DRM_SCALING_FILTER_DEFAULT).
1763 *
1764 * This function lets driver to enable the scaling filter property on a given
1765 * plane.
1766 *
1767 * RETURNS:
1768 * Zero for success or -errno
1769 */
1770int drm_plane_create_scaling_filter_property(struct drm_plane *plane,
1771 unsigned int supported_filters)
1772{
1773 struct drm_property *prop =
1774 drm_create_scaling_filter_prop(plane->dev, supported_filters);
1775
1776 if (IS_ERR(prop))
1777 return PTR_ERR(prop);
1778
1779 drm_object_attach_property(&plane->base, prop,
1780 DRM_SCALING_FILTER_DEFAULT);
1781 plane->scaling_filter_property = prop;
1782
1783 return 0;
1784}
1785EXPORT_SYMBOL(drm_plane_create_scaling_filter_property);
1786
1787/**
1788 * drm_plane_add_size_hints_property - create a size hints property
1789 *
1790 * @plane: drm plane
1791 * @hints: size hints
1792 * @num_hints: number of size hints
1793 *
1794 * Create a size hints property for the plane.
1795 *
1796 * RETURNS:
1797 * Zero for success or -errno
1798 */
1799int drm_plane_add_size_hints_property(struct drm_plane *plane,
1800 const struct drm_plane_size_hint *hints,
1801 int num_hints)
1802{
1803 struct drm_device *dev = plane->dev;
1804 struct drm_mode_config *config = &dev->mode_config;
1805 struct drm_property_blob *blob;
1806
1807 /* extending to other plane types needs actual thought */
1808 if (drm_WARN_ON(dev, plane->type != DRM_PLANE_TYPE_CURSOR))
1809 return -EINVAL;
1810
1811 blob = drm_property_create_blob(dev,
1812 array_size(sizeof(hints[0]), num_hints),
1813 hints);
1814 if (IS_ERR(blob))
1815 return PTR_ERR(blob);
1816
1817 drm_object_attach_property(&plane->base, config->size_hints_property,
1818 blob->base.id);
1819
1820 return 0;
1821}
1822EXPORT_SYMBOL(drm_plane_add_size_hints_property);
1823
1824/**
1825 * drm_plane_create_color_pipeline_property - create a new color pipeline
1826 * property
1827 *
1828 * @plane: drm plane
1829 * @pipelines: list of pipelines
1830 * @num_pipelines: number of pipelines
1831 *
1832 * Create the COLOR_PIPELINE plane property to specific color pipelines on
1833 * the plane.
1834 *
1835 * RETURNS:
1836 * Zero for success or -errno
1837 */
1838int drm_plane_create_color_pipeline_property(struct drm_plane *plane,
1839 const struct drm_prop_enum_list *pipelines,
1840 int num_pipelines)
1841{
1842 struct drm_prop_enum_list *all_pipelines;
1843 struct drm_property *prop;
1844 int len = 0;
1845 int i;
1846
1847 all_pipelines = kzalloc_objs(*all_pipelines, num_pipelines + 1);
1848
1849 if (!all_pipelines) {
1850 drm_err(plane->dev, "failed to allocate color pipeline\n");
1851 return -ENOMEM;
1852 }
1853
1854 /* Create default Bypass color pipeline */
1855 all_pipelines[len].type = 0;
1856 all_pipelines[len].name = "Bypass";
1857 len++;
1858
1859 /* Add all other color pipelines */
1860 for (i = 0; i < num_pipelines; i++, len++) {
1861 all_pipelines[len].type = pipelines[i].type;
1862 all_pipelines[len].name = pipelines[i].name;
1863 }
1864
1865 prop = drm_property_create_enum(plane->dev, DRM_MODE_PROP_ATOMIC,
1866 "COLOR_PIPELINE",
1867 all_pipelines, len);
1868 if (!prop) {
1869 kfree(all_pipelines);
1870 return -ENOMEM;
1871 }
1872
1873 drm_object_attach_property(&plane->base, prop, 0);
1874 plane->color_pipeline_property = prop;
1875
1876 kfree(all_pipelines);
1877 return 0;
1878}
1879EXPORT_SYMBOL(drm_plane_create_color_pipeline_property);