2 * Copyright (c) 2016 Intel Corporation
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5 * documentation for any purpose is hereby granted without fee, provided that
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23 #include <linux/slab.h>
24 #include <linux/uaccess.h>
26 #include <drm/drm_plane.h>
27 #include <drm/drm_drv.h>
28 #include <drm/drm_print.h>
29 #include <drm/drm_framebuffer.h>
30 #include <drm/drm_file.h>
31 #include <drm/drm_crtc.h>
32 #include <drm/drm_fourcc.h>
33 #include <drm/drm_managed.h>
34 #include <drm/drm_vblank.h>
36 #include "drm_crtc_internal.h"
41 * A plane represents an image source that can be blended with or overlaid on
42 * top of a CRTC during the scanout process. Planes take their input data from a
43 * &drm_framebuffer object. The plane itself specifies the cropping and scaling
44 * of that image, and where it is placed on the visible area of a display
45 * pipeline, represented by &drm_crtc. A plane can also have additional
46 * properties that specify how the pixels are positioned and blended, like
47 * rotation or Z-position. All these properties are stored in &drm_plane_state.
49 * Unless explicitly specified (via CRTC property or otherwise), the active area
50 * of a CRTC will be black by default. This means portions of the active area
51 * which are not covered by a plane will be black, and alpha blending of any
52 * planes with the CRTC background will blend with black at the lowest zpos.
54 * To create a plane, a KMS drivers allocates and zeroes an instances of
55 * &struct drm_plane (possibly as part of a larger structure) and registers it
56 * with a call to drm_universal_plane_init().
58 * Each plane has a type, see enum drm_plane_type. A plane can be compatible
59 * with multiple CRTCs, see &drm_plane.possible_crtcs.
61 * Each CRTC must have a unique primary plane userspace can attach to enable
62 * the CRTC. In other words, userspace must be able to attach a different
63 * primary plane to each CRTC at the same time. Primary planes can still be
64 * compatible with multiple CRTCs. There must be exactly as many primary planes
67 * Legacy uAPI doesn't expose the primary and cursor planes directly. DRM core
68 * relies on the driver to set the primary and optionally the cursor plane used
69 * for legacy IOCTLs. This is done by calling drm_crtc_init_with_planes(). All
70 * drivers must provide one primary plane per CRTC to avoid surprising legacy
75 * DOC: standard plane properties
77 * DRM planes have a few standardized properties:
80 * Immutable property describing the type of the plane.
82 * For user-space which has enabled the &DRM_CLIENT_CAP_ATOMIC capability,
83 * the plane type is just a hint and is mostly superseded by atomic
84 * test-only commits. The type hint can still be used to come up more
85 * easily with a plane configuration accepted by the driver.
87 * The value of this property can be one of the following:
90 * To light up a CRTC, attaching a primary plane is the most likely to
91 * work if it covers the whole CRTC and doesn't have scaling or
94 * Drivers may support more features for the primary plane, user-space
95 * can find out with test-only atomic commits.
97 * Some primary planes are implicitly used by the kernel in the legacy
98 * IOCTLs &DRM_IOCTL_MODE_SETCRTC and &DRM_IOCTL_MODE_PAGE_FLIP.
99 * Therefore user-space must not mix explicit usage of any primary
100 * plane (e.g. through an atomic commit) with these legacy IOCTLs.
103 * To enable this plane, using a framebuffer configured without scaling
104 * or cropping and with the following properties is the most likely to
107 * - If the driver provides the capabilities &DRM_CAP_CURSOR_WIDTH and
108 * &DRM_CAP_CURSOR_HEIGHT, create the framebuffer with this size.
109 * Otherwise, create a framebuffer with the size 64x64.
110 * - If the driver doesn't support modifiers, create a framebuffer with
111 * a linear layout. Otherwise, use the IN_FORMATS plane property.
113 * Drivers may support more features for the cursor plane, user-space
114 * can find out with test-only atomic commits.
116 * Some cursor planes are implicitly used by the kernel in the legacy
117 * IOCTLs &DRM_IOCTL_MODE_CURSOR and &DRM_IOCTL_MODE_CURSOR2.
118 * Therefore user-space must not mix explicit usage of any cursor
119 * plane (e.g. through an atomic commit) with these legacy IOCTLs.
121 * Some drivers may support cursors even if no cursor plane is exposed.
122 * In this case, the legacy cursor IOCTLs can be used to configure the
126 * Neither primary nor cursor.
128 * Overlay planes are the only planes exposed when the
129 * &DRM_CLIENT_CAP_UNIVERSAL_PLANES capability is disabled.
132 * Blob property which contains the set of buffer format and modifier
133 * pairs supported by this plane. The blob is a struct
134 * drm_format_modifier_blob. Without this property the plane doesn't
135 * support buffers with modifiers. Userspace cannot change this property.
137 * Note that userspace can check the &DRM_CAP_ADDFB2_MODIFIERS driver
138 * capability for general modifier support. If this flag is set then every
139 * plane will have the IN_FORMATS property, even when it only supports
140 * DRM_FORMAT_MOD_LINEAR. Before linux kernel release v5.1 there have been
141 * various bugs in this area with inconsistencies between the capability
142 * flag and per-plane properties.
145 static unsigned int drm_num_planes(struct drm_device *dev)
147 unsigned int num = 0;
148 struct drm_plane *tmp;
150 drm_for_each_plane(tmp, dev) {
158 formats_ptr(struct drm_format_modifier_blob *blob)
160 return (u32 *)(((char *)blob) + blob->formats_offset);
163 static inline struct drm_format_modifier *
164 modifiers_ptr(struct drm_format_modifier_blob *blob)
166 return (struct drm_format_modifier *)(((char *)blob) + blob->modifiers_offset);
169 static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane)
171 const struct drm_mode_config *config = &dev->mode_config;
172 struct drm_property_blob *blob;
173 struct drm_format_modifier *mod;
174 size_t blob_size, formats_size, modifiers_size;
175 struct drm_format_modifier_blob *blob_data;
178 formats_size = sizeof(__u32) * plane->format_count;
179 if (WARN_ON(!formats_size)) {
180 /* 0 formats are never expected */
185 sizeof(struct drm_format_modifier) * plane->modifier_count;
187 blob_size = sizeof(struct drm_format_modifier_blob);
188 /* Modifiers offset is a pointer to a struct with a 64 bit field so it
189 * should be naturally aligned to 8B.
191 BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8);
192 blob_size += ALIGN(formats_size, 8);
193 blob_size += modifiers_size;
195 blob = drm_property_create_blob(dev, blob_size, NULL);
199 blob_data = blob->data;
200 blob_data->version = FORMAT_BLOB_CURRENT;
201 blob_data->count_formats = plane->format_count;
202 blob_data->formats_offset = sizeof(struct drm_format_modifier_blob);
203 blob_data->count_modifiers = plane->modifier_count;
205 blob_data->modifiers_offset =
206 ALIGN(blob_data->formats_offset + formats_size, 8);
208 memcpy(formats_ptr(blob_data), plane->format_types, formats_size);
210 mod = modifiers_ptr(blob_data);
211 for (i = 0; i < plane->modifier_count; i++) {
212 for (j = 0; j < plane->format_count; j++) {
213 if (!plane->funcs->format_mod_supported ||
214 plane->funcs->format_mod_supported(plane,
215 plane->format_types[j],
216 plane->modifiers[i])) {
217 mod->formats |= 1ULL << j;
221 mod->modifier = plane->modifiers[i];
227 drm_object_attach_property(&plane->base, config->modifiers_property,
234 static int __drm_universal_plane_init(struct drm_device *dev,
235 struct drm_plane *plane,
236 uint32_t possible_crtcs,
237 const struct drm_plane_funcs *funcs,
238 const uint32_t *formats,
239 unsigned int format_count,
240 const uint64_t *format_modifiers,
241 enum drm_plane_type type,
242 const char *name, va_list ap)
244 struct drm_mode_config *config = &dev->mode_config;
245 static const uint64_t default_modifiers[] = {
246 DRM_FORMAT_MOD_LINEAR,
248 unsigned int format_modifier_count = 0;
251 /* plane index is used with 32bit bitmasks */
252 if (WARN_ON(config->num_total_plane >= 32))
256 * First driver to need more than 64 formats needs to fix this. Each
257 * format is encoded as a bit and the current code only supports a u64.
259 if (WARN_ON(format_count > 64))
262 WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
263 (!funcs->atomic_destroy_state ||
264 !funcs->atomic_duplicate_state));
266 ret = drm_mode_object_add(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
270 drm_modeset_lock_init(&plane->mutex);
272 plane->base.properties = &plane->properties;
274 plane->funcs = funcs;
275 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
277 if (!plane->format_types) {
278 DRM_DEBUG_KMS("out of memory when allocating plane\n");
279 drm_mode_object_unregister(dev, &plane->base);
283 if (format_modifiers) {
284 const uint64_t *temp_modifiers = format_modifiers;
286 while (*temp_modifiers++ != DRM_FORMAT_MOD_INVALID)
287 format_modifier_count++;
289 if (!dev->mode_config.fb_modifiers_not_supported) {
290 format_modifiers = default_modifiers;
291 format_modifier_count = ARRAY_SIZE(default_modifiers);
295 /* autoset the cap and check for consistency across all planes */
296 drm_WARN_ON(dev, config->fb_modifiers_not_supported &&
297 format_modifier_count);
299 plane->modifier_count = format_modifier_count;
300 plane->modifiers = kmalloc_array(format_modifier_count,
301 sizeof(format_modifiers[0]),
304 if (format_modifier_count && !plane->modifiers) {
305 DRM_DEBUG_KMS("out of memory when allocating plane\n");
306 kfree(plane->format_types);
307 drm_mode_object_unregister(dev, &plane->base);
312 plane->name = kvasprintf(GFP_KERNEL, name, ap);
314 plane->name = kasprintf(GFP_KERNEL, "plane-%d",
315 drm_num_planes(dev));
318 kfree(plane->format_types);
319 kfree(plane->modifiers);
320 drm_mode_object_unregister(dev, &plane->base);
324 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
325 plane->format_count = format_count;
326 memcpy(plane->modifiers, format_modifiers,
327 format_modifier_count * sizeof(format_modifiers[0]));
328 plane->possible_crtcs = possible_crtcs;
331 list_add_tail(&plane->head, &config->plane_list);
332 plane->index = config->num_total_plane++;
334 drm_object_attach_property(&plane->base,
335 config->plane_type_property,
338 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
339 drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
340 drm_object_attach_property(&plane->base, config->prop_in_fence_fd, -1);
341 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
342 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
343 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
344 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
345 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
346 drm_object_attach_property(&plane->base, config->prop_src_x, 0);
347 drm_object_attach_property(&plane->base, config->prop_src_y, 0);
348 drm_object_attach_property(&plane->base, config->prop_src_w, 0);
349 drm_object_attach_property(&plane->base, config->prop_src_h, 0);
352 if (format_modifier_count)
353 create_in_format_blob(dev, plane);
359 * drm_universal_plane_init - Initialize a new universal plane object
361 * @plane: plane object to init
362 * @possible_crtcs: bitmask of possible CRTCs
363 * @funcs: callbacks for the new plane
364 * @formats: array of supported formats (DRM_FORMAT\_\*)
365 * @format_count: number of elements in @formats
366 * @format_modifiers: array of struct drm_format modifiers terminated by
367 * DRM_FORMAT_MOD_INVALID
368 * @type: type of plane (overlay, primary, cursor)
369 * @name: printf style format string for the plane name, or NULL for default name
371 * Initializes a plane object of type @type. The &drm_plane_funcs.destroy hook
372 * should call drm_plane_cleanup() and kfree() the plane structure. The plane
373 * structure should not be allocated with devm_kzalloc().
375 * Note: consider using drmm_universal_plane_alloc() instead of
376 * drm_universal_plane_init() to let the DRM managed resource infrastructure
377 * take care of cleanup and deallocation.
379 * Drivers that only support the DRM_FORMAT_MOD_LINEAR modifier support may set
380 * @format_modifiers to NULL. The plane will advertise the linear modifier.
383 * Zero on success, error code on failure.
385 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
386 uint32_t possible_crtcs,
387 const struct drm_plane_funcs *funcs,
388 const uint32_t *formats, unsigned int format_count,
389 const uint64_t *format_modifiers,
390 enum drm_plane_type type,
391 const char *name, ...)
396 WARN_ON(!funcs->destroy);
399 ret = __drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
400 formats, format_count, format_modifiers,
405 EXPORT_SYMBOL(drm_universal_plane_init);
407 static void drmm_universal_plane_alloc_release(struct drm_device *dev, void *ptr)
409 struct drm_plane *plane = ptr;
411 if (WARN_ON(!plane->dev))
414 drm_plane_cleanup(plane);
417 void *__drmm_universal_plane_alloc(struct drm_device *dev, size_t size,
418 size_t offset, uint32_t possible_crtcs,
419 const struct drm_plane_funcs *funcs,
420 const uint32_t *formats, unsigned int format_count,
421 const uint64_t *format_modifiers,
422 enum drm_plane_type type,
423 const char *name, ...)
426 struct drm_plane *plane;
430 if (WARN_ON(!funcs || funcs->destroy))
431 return ERR_PTR(-EINVAL);
433 container = drmm_kzalloc(dev, size, GFP_KERNEL);
435 return ERR_PTR(-ENOMEM);
437 plane = container + offset;
440 ret = __drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
441 formats, format_count, format_modifiers,
447 ret = drmm_add_action_or_reset(dev, drmm_universal_plane_alloc_release,
454 EXPORT_SYMBOL(__drmm_universal_plane_alloc);
456 void *__drm_universal_plane_alloc(struct drm_device *dev, size_t size,
457 size_t offset, uint32_t possible_crtcs,
458 const struct drm_plane_funcs *funcs,
459 const uint32_t *formats, unsigned int format_count,
460 const uint64_t *format_modifiers,
461 enum drm_plane_type type,
462 const char *name, ...)
465 struct drm_plane *plane;
469 if (drm_WARN_ON(dev, !funcs))
470 return ERR_PTR(-EINVAL);
472 container = kzalloc(size, GFP_KERNEL);
474 return ERR_PTR(-ENOMEM);
476 plane = container + offset;
479 ret = __drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
480 formats, format_count, format_modifiers,
492 EXPORT_SYMBOL(__drm_universal_plane_alloc);
494 int drm_plane_register_all(struct drm_device *dev)
496 unsigned int num_planes = 0;
497 unsigned int num_zpos = 0;
498 struct drm_plane *plane;
501 drm_for_each_plane(plane, dev) {
502 if (plane->funcs->late_register)
503 ret = plane->funcs->late_register(plane);
507 if (plane->zpos_property)
512 drm_WARN(dev, num_zpos && num_planes != num_zpos,
513 "Mixing planes with and without zpos property is invalid\n");
518 void drm_plane_unregister_all(struct drm_device *dev)
520 struct drm_plane *plane;
522 drm_for_each_plane(plane, dev) {
523 if (plane->funcs->early_unregister)
524 plane->funcs->early_unregister(plane);
529 * drm_plane_cleanup - Clean up the core plane usage
530 * @plane: plane to cleanup
532 * This function cleans up @plane and removes it from the DRM mode setting
533 * core. Note that the function does *not* free the plane structure itself,
534 * this is the responsibility of the caller.
536 void drm_plane_cleanup(struct drm_plane *plane)
538 struct drm_device *dev = plane->dev;
540 drm_modeset_lock_fini(&plane->mutex);
542 kfree(plane->format_types);
543 kfree(plane->modifiers);
544 drm_mode_object_unregister(dev, &plane->base);
546 BUG_ON(list_empty(&plane->head));
548 /* Note that the plane_list is considered to be static; should we
549 * remove the drm_plane at runtime we would have to decrement all
550 * the indices on the drm_plane after us in the plane_list.
553 list_del(&plane->head);
554 dev->mode_config.num_total_plane--;
556 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
557 if (plane->state && plane->funcs->atomic_destroy_state)
558 plane->funcs->atomic_destroy_state(plane, plane->state);
562 memset(plane, 0, sizeof(*plane));
564 EXPORT_SYMBOL(drm_plane_cleanup);
567 * drm_plane_from_index - find the registered plane at an index
569 * @idx: index of registered plane to find for
571 * Given a plane index, return the registered plane from DRM device's
572 * list of planes with matching index. This is the inverse of drm_plane_index().
575 drm_plane_from_index(struct drm_device *dev, int idx)
577 struct drm_plane *plane;
579 drm_for_each_plane(plane, dev)
580 if (idx == plane->index)
585 EXPORT_SYMBOL(drm_plane_from_index);
588 * drm_plane_force_disable - Forcibly disable a plane
589 * @plane: plane to disable
591 * Forces the plane to be disabled.
593 * Used when the plane's current framebuffer is destroyed,
594 * and when restoring fbdev mode.
596 * Note that this function is not suitable for atomic drivers, since it doesn't
597 * wire through the lock acquisition context properly and hence can't handle
598 * retries or driver private locks. You probably want to use
599 * drm_atomic_helper_disable_plane() or
600 * drm_atomic_helper_disable_planes_on_crtc() instead.
602 void drm_plane_force_disable(struct drm_plane *plane)
609 WARN_ON(drm_drv_uses_atomic_modeset(plane->dev));
611 plane->old_fb = plane->fb;
612 ret = plane->funcs->disable_plane(plane, NULL);
614 DRM_ERROR("failed to disable plane with busy fb\n");
615 plane->old_fb = NULL;
618 /* disconnect the plane from the fb and crtc: */
619 drm_framebuffer_put(plane->old_fb);
620 plane->old_fb = NULL;
624 EXPORT_SYMBOL(drm_plane_force_disable);
627 * drm_mode_plane_set_obj_prop - set the value of a property
628 * @plane: drm plane object to set property value for
629 * @property: property to set
630 * @value: value the property should be set to
632 * This functions sets a given property on a given plane object. This function
633 * calls the driver's ->set_property callback and changes the software state of
634 * the property if the callback succeeds.
637 * Zero on success, error code on failure.
639 int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
640 struct drm_property *property,
644 struct drm_mode_object *obj = &plane->base;
646 if (plane->funcs->set_property)
647 ret = plane->funcs->set_property(plane, property, value);
649 drm_object_property_set_value(obj, property, value);
653 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
655 int drm_mode_getplane_res(struct drm_device *dev, void *data,
656 struct drm_file *file_priv)
658 struct drm_mode_get_plane_res *plane_resp = data;
659 struct drm_plane *plane;
660 uint32_t __user *plane_ptr;
663 if (!drm_core_check_feature(dev, DRIVER_MODESET))
666 plane_ptr = u64_to_user_ptr(plane_resp->plane_id_ptr);
669 * This ioctl is called twice, once to determine how much space is
670 * needed, and the 2nd time to fill it.
672 drm_for_each_plane(plane, dev) {
674 * Unless userspace set the 'universal planes'
675 * capability bit, only advertise overlays.
677 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
678 !file_priv->universal_planes)
682 * If we're running on a virtualized driver then,
683 * unless userspace advertizes support for the
684 * virtualized cursor plane, disable cursor planes
685 * because they'll be broken due to missing cursor
688 if (plane->type == DRM_PLANE_TYPE_CURSOR &&
689 drm_core_check_feature(dev, DRIVER_CURSOR_HOTSPOT) &&
691 !file_priv->supports_virtualized_cursor_plane)
694 if (drm_lease_held(file_priv, plane->base.id)) {
695 if (count < plane_resp->count_planes &&
696 put_user(plane->base.id, plane_ptr + count))
701 plane_resp->count_planes = count;
706 int drm_mode_getplane(struct drm_device *dev, void *data,
707 struct drm_file *file_priv)
709 struct drm_mode_get_plane *plane_resp = data;
710 struct drm_plane *plane;
711 uint32_t __user *format_ptr;
713 if (!drm_core_check_feature(dev, DRIVER_MODESET))
716 plane = drm_plane_find(dev, file_priv, plane_resp->plane_id);
720 drm_modeset_lock(&plane->mutex, NULL);
721 if (plane->state && plane->state->crtc && drm_lease_held(file_priv, plane->state->crtc->base.id))
722 plane_resp->crtc_id = plane->state->crtc->base.id;
723 else if (!plane->state && plane->crtc && drm_lease_held(file_priv, plane->crtc->base.id))
724 plane_resp->crtc_id = plane->crtc->base.id;
726 plane_resp->crtc_id = 0;
728 if (plane->state && plane->state->fb)
729 plane_resp->fb_id = plane->state->fb->base.id;
730 else if (!plane->state && plane->fb)
731 plane_resp->fb_id = plane->fb->base.id;
733 plane_resp->fb_id = 0;
734 drm_modeset_unlock(&plane->mutex);
736 plane_resp->plane_id = plane->base.id;
737 plane_resp->possible_crtcs = drm_lease_filter_crtcs(file_priv,
738 plane->possible_crtcs);
740 plane_resp->gamma_size = 0;
743 * This ioctl is called twice, once to determine how much space is
744 * needed, and the 2nd time to fill it.
746 if (plane->format_count &&
747 (plane_resp->count_format_types >= plane->format_count)) {
748 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
749 if (copy_to_user(format_ptr,
751 sizeof(uint32_t) * plane->format_count)) {
755 plane_resp->count_format_types = plane->format_count;
760 int drm_plane_check_pixel_format(struct drm_plane *plane,
761 u32 format, u64 modifier)
765 for (i = 0; i < plane->format_count; i++) {
766 if (format == plane->format_types[i])
769 if (i == plane->format_count)
772 if (plane->funcs->format_mod_supported) {
773 if (!plane->funcs->format_mod_supported(plane, format, modifier))
776 if (!plane->modifier_count)
779 for (i = 0; i < plane->modifier_count; i++) {
780 if (modifier == plane->modifiers[i])
783 if (i == plane->modifier_count)
790 static int __setplane_check(struct drm_plane *plane,
791 struct drm_crtc *crtc,
792 struct drm_framebuffer *fb,
793 int32_t crtc_x, int32_t crtc_y,
794 uint32_t crtc_w, uint32_t crtc_h,
795 uint32_t src_x, uint32_t src_y,
796 uint32_t src_w, uint32_t src_h)
800 /* Check whether this plane is usable on this CRTC */
801 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
802 DRM_DEBUG_KMS("Invalid crtc for plane\n");
806 /* Check whether this plane supports the fb pixel format. */
807 ret = drm_plane_check_pixel_format(plane, fb->format->format,
810 DRM_DEBUG_KMS("Invalid pixel format %p4cc, modifier 0x%llx\n",
811 &fb->format->format, fb->modifier);
815 /* Give drivers some help against integer overflows */
816 if (crtc_w > INT_MAX ||
817 crtc_x > INT_MAX - (int32_t) crtc_w ||
819 crtc_y > INT_MAX - (int32_t) crtc_h) {
820 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
821 crtc_w, crtc_h, crtc_x, crtc_y);
825 ret = drm_framebuffer_check_src_coords(src_x, src_y, src_w, src_h, fb);
833 * drm_any_plane_has_format - Check whether any plane supports this format and modifier combination
835 * @format: pixel format (DRM_FORMAT_*)
836 * @modifier: data layout modifier
839 * Whether at least one plane supports the specified format and modifier combination.
841 bool drm_any_plane_has_format(struct drm_device *dev,
842 u32 format, u64 modifier)
844 struct drm_plane *plane;
846 drm_for_each_plane(plane, dev) {
847 if (drm_plane_check_pixel_format(plane, format, modifier) == 0)
853 EXPORT_SYMBOL(drm_any_plane_has_format);
856 * __setplane_internal - setplane handler for internal callers
858 * This function will take a reference on the new fb for the plane
861 * src_{x,y,w,h} are provided in 16.16 fixed point format
863 static int __setplane_internal(struct drm_plane *plane,
864 struct drm_crtc *crtc,
865 struct drm_framebuffer *fb,
866 int32_t crtc_x, int32_t crtc_y,
867 uint32_t crtc_w, uint32_t crtc_h,
868 /* src_{x,y,w,h} values are 16.16 fixed point */
869 uint32_t src_x, uint32_t src_y,
870 uint32_t src_w, uint32_t src_h,
871 struct drm_modeset_acquire_ctx *ctx)
875 WARN_ON(drm_drv_uses_atomic_modeset(plane->dev));
877 /* No fb means shut it down */
879 plane->old_fb = plane->fb;
880 ret = plane->funcs->disable_plane(plane, ctx);
885 plane->old_fb = NULL;
890 ret = __setplane_check(plane, crtc, fb,
891 crtc_x, crtc_y, crtc_w, crtc_h,
892 src_x, src_y, src_w, src_h);
896 plane->old_fb = plane->fb;
897 ret = plane->funcs->update_plane(plane, crtc, fb,
898 crtc_x, crtc_y, crtc_w, crtc_h,
899 src_x, src_y, src_w, src_h, ctx);
903 drm_framebuffer_get(plane->fb);
905 plane->old_fb = NULL;
910 drm_framebuffer_put(plane->old_fb);
911 plane->old_fb = NULL;
916 static int __setplane_atomic(struct drm_plane *plane,
917 struct drm_crtc *crtc,
918 struct drm_framebuffer *fb,
919 int32_t crtc_x, int32_t crtc_y,
920 uint32_t crtc_w, uint32_t crtc_h,
921 uint32_t src_x, uint32_t src_y,
922 uint32_t src_w, uint32_t src_h,
923 struct drm_modeset_acquire_ctx *ctx)
927 WARN_ON(!drm_drv_uses_atomic_modeset(plane->dev));
929 /* No fb means shut it down */
931 return plane->funcs->disable_plane(plane, ctx);
934 * FIXME: This is redundant with drm_atomic_plane_check(),
935 * but the legacy cursor/"async" .update_plane() tricks
936 * don't call that so we still need this here. Should remove
937 * this when all .update_plane() implementations have been
938 * fixed to call drm_atomic_plane_check().
940 ret = __setplane_check(plane, crtc, fb,
941 crtc_x, crtc_y, crtc_w, crtc_h,
942 src_x, src_y, src_w, src_h);
946 return plane->funcs->update_plane(plane, crtc, fb,
947 crtc_x, crtc_y, crtc_w, crtc_h,
948 src_x, src_y, src_w, src_h, ctx);
951 static int setplane_internal(struct drm_plane *plane,
952 struct drm_crtc *crtc,
953 struct drm_framebuffer *fb,
954 int32_t crtc_x, int32_t crtc_y,
955 uint32_t crtc_w, uint32_t crtc_h,
956 /* src_{x,y,w,h} values are 16.16 fixed point */
957 uint32_t src_x, uint32_t src_y,
958 uint32_t src_w, uint32_t src_h)
960 struct drm_modeset_acquire_ctx ctx;
963 DRM_MODESET_LOCK_ALL_BEGIN(plane->dev, ctx,
964 DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
966 if (drm_drv_uses_atomic_modeset(plane->dev))
967 ret = __setplane_atomic(plane, crtc, fb,
968 crtc_x, crtc_y, crtc_w, crtc_h,
969 src_x, src_y, src_w, src_h, &ctx);
971 ret = __setplane_internal(plane, crtc, fb,
972 crtc_x, crtc_y, crtc_w, crtc_h,
973 src_x, src_y, src_w, src_h, &ctx);
975 DRM_MODESET_LOCK_ALL_END(plane->dev, ctx, ret);
980 int drm_mode_setplane(struct drm_device *dev, void *data,
981 struct drm_file *file_priv)
983 struct drm_mode_set_plane *plane_req = data;
984 struct drm_plane *plane;
985 struct drm_crtc *crtc = NULL;
986 struct drm_framebuffer *fb = NULL;
989 if (!drm_core_check_feature(dev, DRIVER_MODESET))
993 * First, find the plane, crtc, and fb objects. If not available,
994 * we don't bother to call the driver.
996 plane = drm_plane_find(dev, file_priv, plane_req->plane_id);
998 DRM_DEBUG_KMS("Unknown plane ID %d\n",
999 plane_req->plane_id);
1003 if (plane_req->fb_id) {
1004 fb = drm_framebuffer_lookup(dev, file_priv, plane_req->fb_id);
1006 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
1011 crtc = drm_crtc_find(dev, file_priv, plane_req->crtc_id);
1013 drm_framebuffer_put(fb);
1014 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
1015 plane_req->crtc_id);
1020 ret = setplane_internal(plane, crtc, fb,
1021 plane_req->crtc_x, plane_req->crtc_y,
1022 plane_req->crtc_w, plane_req->crtc_h,
1023 plane_req->src_x, plane_req->src_y,
1024 plane_req->src_w, plane_req->src_h);
1027 drm_framebuffer_put(fb);
1032 static int drm_mode_cursor_universal(struct drm_crtc *crtc,
1033 struct drm_mode_cursor2 *req,
1034 struct drm_file *file_priv,
1035 struct drm_modeset_acquire_ctx *ctx)
1037 struct drm_device *dev = crtc->dev;
1038 struct drm_plane *plane = crtc->cursor;
1039 struct drm_framebuffer *fb = NULL;
1040 struct drm_mode_fb_cmd2 fbreq = {
1041 .width = req->width,
1042 .height = req->height,
1043 .pixel_format = DRM_FORMAT_ARGB8888,
1044 .pitches = { req->width * 4 },
1045 .handles = { req->handle },
1047 int32_t crtc_x, crtc_y;
1048 uint32_t crtc_w = 0, crtc_h = 0;
1049 uint32_t src_w = 0, src_h = 0;
1053 WARN_ON(plane->crtc != crtc && plane->crtc != NULL);
1056 * Obtain fb we'll be using (either new or existing) and take an extra
1057 * reference to it if fb != null. setplane will take care of dropping
1058 * the reference if the plane update fails.
1060 if (req->flags & DRM_MODE_CURSOR_BO) {
1062 fb = drm_internal_framebuffer_create(dev, &fbreq, file_priv);
1064 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
1068 fb->hot_x = req->hot_x;
1069 fb->hot_y = req->hot_y;
1075 fb = plane->state->fb;
1080 drm_framebuffer_get(fb);
1083 if (req->flags & DRM_MODE_CURSOR_MOVE) {
1087 crtc_x = crtc->cursor_x;
1088 crtc_y = crtc->cursor_y;
1093 crtc_h = fb->height;
1094 src_w = fb->width << 16;
1095 src_h = fb->height << 16;
1098 if (drm_drv_uses_atomic_modeset(dev))
1099 ret = __setplane_atomic(plane, crtc, fb,
1100 crtc_x, crtc_y, crtc_w, crtc_h,
1101 0, 0, src_w, src_h, ctx);
1103 ret = __setplane_internal(plane, crtc, fb,
1104 crtc_x, crtc_y, crtc_w, crtc_h,
1105 0, 0, src_w, src_h, ctx);
1108 drm_framebuffer_put(fb);
1110 /* Update successful; save new cursor position, if necessary */
1111 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
1112 crtc->cursor_x = req->x;
1113 crtc->cursor_y = req->y;
1119 static int drm_mode_cursor_common(struct drm_device *dev,
1120 struct drm_mode_cursor2 *req,
1121 struct drm_file *file_priv)
1123 struct drm_crtc *crtc;
1124 struct drm_modeset_acquire_ctx ctx;
1127 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1130 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
1133 crtc = drm_crtc_find(dev, file_priv, req->crtc_id);
1135 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
1139 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1141 ret = drm_modeset_lock(&crtc->mutex, &ctx);
1145 * If this crtc has a universal cursor plane, call that plane's update
1146 * handler rather than using legacy cursor handlers.
1149 ret = drm_modeset_lock(&crtc->cursor->mutex, &ctx);
1153 if (!drm_lease_held(file_priv, crtc->cursor->base.id)) {
1158 ret = drm_mode_cursor_universal(crtc, req, file_priv, &ctx);
1162 if (req->flags & DRM_MODE_CURSOR_BO) {
1163 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
1167 /* Turns off the cursor if handle is 0 */
1168 if (crtc->funcs->cursor_set2)
1169 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
1170 req->width, req->height, req->hot_x, req->hot_y);
1172 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
1173 req->width, req->height);
1176 if (req->flags & DRM_MODE_CURSOR_MOVE) {
1177 if (crtc->funcs->cursor_move) {
1178 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
1185 if (ret == -EDEADLK) {
1186 ret = drm_modeset_backoff(&ctx);
1191 drm_modeset_drop_locks(&ctx);
1192 drm_modeset_acquire_fini(&ctx);
1199 int drm_mode_cursor_ioctl(struct drm_device *dev,
1200 void *data, struct drm_file *file_priv)
1202 struct drm_mode_cursor *req = data;
1203 struct drm_mode_cursor2 new_req;
1205 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
1206 new_req.hot_x = new_req.hot_y = 0;
1208 return drm_mode_cursor_common(dev, &new_req, file_priv);
1212 * Set the cursor configuration based on user request. This implements the 2nd
1213 * version of the cursor ioctl, which allows userspace to additionally specify
1214 * the hotspot of the pointer.
1216 int drm_mode_cursor2_ioctl(struct drm_device *dev,
1217 void *data, struct drm_file *file_priv)
1219 struct drm_mode_cursor2 *req = data;
1221 return drm_mode_cursor_common(dev, req, file_priv);
1224 int drm_mode_page_flip_ioctl(struct drm_device *dev,
1225 void *data, struct drm_file *file_priv)
1227 struct drm_mode_crtc_page_flip_target *page_flip = data;
1228 struct drm_crtc *crtc;
1229 struct drm_plane *plane;
1230 struct drm_framebuffer *fb = NULL, *old_fb;
1231 struct drm_pending_vblank_event *e = NULL;
1232 u32 target_vblank = page_flip->sequence;
1233 struct drm_modeset_acquire_ctx ctx;
1236 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1239 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS)
1242 if (page_flip->sequence != 0 && !(page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET))
1245 /* Only one of the DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags
1248 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) == DRM_MODE_PAGE_FLIP_TARGET)
1251 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
1254 crtc = drm_crtc_find(dev, file_priv, page_flip->crtc_id);
1258 plane = crtc->primary;
1260 if (!drm_lease_held(file_priv, plane->base.id))
1263 if (crtc->funcs->page_flip_target) {
1267 r = drm_crtc_vblank_get(crtc);
1271 current_vblank = (u32)drm_crtc_vblank_count(crtc);
1273 switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) {
1274 case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE:
1275 if ((int)(target_vblank - current_vblank) > 1) {
1276 DRM_DEBUG("Invalid absolute flip target %u, "
1277 "must be <= %u\n", target_vblank,
1278 current_vblank + 1);
1279 drm_crtc_vblank_put(crtc);
1283 case DRM_MODE_PAGE_FLIP_TARGET_RELATIVE:
1284 if (target_vblank != 0 && target_vblank != 1) {
1285 DRM_DEBUG("Invalid relative flip target %u, "
1286 "must be 0 or 1\n", target_vblank);
1287 drm_crtc_vblank_put(crtc);
1290 target_vblank += current_vblank;
1293 target_vblank = current_vblank +
1294 !(page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC);
1297 } else if (crtc->funcs->page_flip == NULL ||
1298 (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET)) {
1302 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1304 ret = drm_modeset_lock(&crtc->mutex, &ctx);
1307 ret = drm_modeset_lock(&plane->mutex, &ctx);
1312 old_fb = plane->state->fb;
1316 if (old_fb == NULL) {
1317 /* The framebuffer is currently unbound, presumably
1318 * due to a hotplug event, that userspace has not
1325 fb = drm_framebuffer_lookup(dev, file_priv, page_flip->fb_id);
1332 const struct drm_plane_state *state = plane->state;
1334 ret = drm_framebuffer_check_src_coords(state->src_x,
1340 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y,
1347 * Only check the FOURCC format code, excluding modifiers. This is
1348 * enough for all legacy drivers. Atomic drivers have their own
1349 * checks in their ->atomic_check implementation, which will
1350 * return -EINVAL if any hw or driver constraint is violated due
1351 * to modifier changes.
1353 if (old_fb->format->format != fb->format->format) {
1354 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
1359 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1360 e = kzalloc(sizeof *e, GFP_KERNEL);
1366 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1367 e->event.base.length = sizeof(e->event);
1368 e->event.vbl.user_data = page_flip->user_data;
1369 e->event.vbl.crtc_id = crtc->base.id;
1371 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
1379 plane->old_fb = plane->fb;
1380 if (crtc->funcs->page_flip_target)
1381 ret = crtc->funcs->page_flip_target(crtc, fb, e,
1386 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags,
1389 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT)
1390 drm_event_cancel_free(dev, &e->base);
1391 /* Keep the old fb, don't unref it. */
1392 plane->old_fb = NULL;
1394 if (!plane->state) {
1396 drm_framebuffer_get(fb);
1402 drm_framebuffer_put(fb);
1405 drm_framebuffer_put(plane->old_fb);
1406 plane->old_fb = NULL;
1408 if (ret == -EDEADLK) {
1409 ret = drm_modeset_backoff(&ctx);
1414 drm_modeset_drop_locks(&ctx);
1415 drm_modeset_acquire_fini(&ctx);
1417 if (ret && crtc->funcs->page_flip_target)
1418 drm_crtc_vblank_put(crtc);
1424 * DOC: damage tracking
1426 * FB_DAMAGE_CLIPS is an optional plane property which provides a means to
1427 * specify a list of damage rectangles on a plane in framebuffer coordinates of
1428 * the framebuffer attached to the plane. In current context damage is the area
1429 * of plane framebuffer that has changed since last plane update (also called
1430 * page-flip), irrespective of whether currently attached framebuffer is same as
1431 * framebuffer attached during last plane update or not.
1433 * FB_DAMAGE_CLIPS is a hint to kernel which could be helpful for some drivers
1434 * to optimize internally especially for virtual devices where each framebuffer
1435 * change needs to be transmitted over network, usb, etc.
1437 * Since FB_DAMAGE_CLIPS is a hint so it is an optional property. User-space can
1438 * ignore damage clips property and in that case driver will do a full plane
1439 * update. In case damage clips are provided then it is guaranteed that the area
1440 * inside damage clips will be updated to plane. For efficiency driver can do
1441 * full update or can update more than specified in damage clips. Since driver
1442 * is free to read more, user-space must always render the entire visible
1443 * framebuffer. Otherwise there can be corruptions. Also, if a user-space
1444 * provides damage clips which doesn't encompass the actual damage to
1445 * framebuffer (since last plane update) can result in incorrect rendering.
1447 * FB_DAMAGE_CLIPS is a blob property with the layout of blob data is simply an
1448 * array of &drm_mode_rect. Unlike plane &drm_plane_state.src coordinates,
1449 * damage clips are not in 16.16 fixed point. Similar to plane src in
1450 * framebuffer, damage clips cannot be negative. In damage clip, x1/y1 are
1451 * inclusive and x2/y2 are exclusive. While kernel does not error for overlapped
1452 * damage clips, it is strongly discouraged.
1454 * Drivers that are interested in damage interface for plane should enable
1455 * FB_DAMAGE_CLIPS property by calling drm_plane_enable_fb_damage_clips().
1456 * Drivers implementing damage can use drm_atomic_helper_damage_iter_init() and
1457 * drm_atomic_helper_damage_iter_next() helper iterator function to get damage
1458 * rectangles clipped to &drm_plane_state.src.
1462 * drm_plane_enable_fb_damage_clips - Enables plane fb damage clips property.
1463 * @plane: Plane on which to enable damage clips property.
1465 * This function lets driver to enable the damage clips property on a plane.
1467 void drm_plane_enable_fb_damage_clips(struct drm_plane *plane)
1469 struct drm_device *dev = plane->dev;
1470 struct drm_mode_config *config = &dev->mode_config;
1472 drm_object_attach_property(&plane->base, config->prop_fb_damage_clips,
1475 EXPORT_SYMBOL(drm_plane_enable_fb_damage_clips);
1478 * drm_plane_get_damage_clips_count - Returns damage clips count.
1479 * @state: Plane state.
1481 * Simple helper to get the number of &drm_mode_rect clips set by user-space
1482 * during plane update.
1484 * Return: Number of clips in plane fb_damage_clips blob property.
1487 drm_plane_get_damage_clips_count(const struct drm_plane_state *state)
1489 return (state && state->fb_damage_clips) ?
1490 state->fb_damage_clips->length/sizeof(struct drm_mode_rect) : 0;
1492 EXPORT_SYMBOL(drm_plane_get_damage_clips_count);
1494 struct drm_mode_rect *
1495 __drm_plane_get_damage_clips(const struct drm_plane_state *state)
1497 return (struct drm_mode_rect *)((state && state->fb_damage_clips) ?
1498 state->fb_damage_clips->data : NULL);
1502 * drm_plane_get_damage_clips - Returns damage clips.
1503 * @state: Plane state.
1505 * Note that this function returns uapi type &drm_mode_rect. Drivers might want
1506 * to use the helper functions drm_atomic_helper_damage_iter_init() and
1507 * drm_atomic_helper_damage_iter_next() or drm_atomic_helper_damage_merged() if
1508 * the driver can only handle a single damage region at most.
1510 * Return: Damage clips in plane fb_damage_clips blob property.
1512 struct drm_mode_rect *
1513 drm_plane_get_damage_clips(const struct drm_plane_state *state)
1515 struct drm_device *dev = state->plane->dev;
1516 struct drm_mode_config *config = &dev->mode_config;
1518 /* check that drm_plane_enable_fb_damage_clips() was called */
1519 if (!drm_mode_obj_find_prop_id(&state->plane->base,
1520 config->prop_fb_damage_clips->base.id))
1521 drm_warn_once(dev, "drm_plane_enable_fb_damage_clips() not called\n");
1523 return __drm_plane_get_damage_clips(state);
1525 EXPORT_SYMBOL(drm_plane_get_damage_clips);
1527 struct drm_property *
1528 drm_create_scaling_filter_prop(struct drm_device *dev,
1529 unsigned int supported_filters)
1531 struct drm_property *prop;
1532 static const struct drm_prop_enum_list props[] = {
1533 { DRM_SCALING_FILTER_DEFAULT, "Default" },
1534 { DRM_SCALING_FILTER_NEAREST_NEIGHBOR, "Nearest Neighbor" },
1536 unsigned int valid_mode_mask = BIT(DRM_SCALING_FILTER_DEFAULT) |
1537 BIT(DRM_SCALING_FILTER_NEAREST_NEIGHBOR);
1540 if (WARN_ON((supported_filters & ~valid_mode_mask) ||
1541 ((supported_filters & BIT(DRM_SCALING_FILTER_DEFAULT)) == 0)))
1542 return ERR_PTR(-EINVAL);
1544 prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
1546 hweight32(supported_filters));
1548 return ERR_PTR(-ENOMEM);
1550 for (i = 0; i < ARRAY_SIZE(props); i++) {
1553 if (!(BIT(props[i].type) & supported_filters))
1556 ret = drm_property_add_enum(prop, props[i].type,
1560 drm_property_destroy(dev, prop);
1562 return ERR_PTR(ret);
1570 * drm_plane_create_scaling_filter_property - create a new scaling filter
1574 * @supported_filters: bitmask of supported scaling filters, must include
1575 * BIT(DRM_SCALING_FILTER_DEFAULT).
1577 * This function lets driver to enable the scaling filter property on a given
1581 * Zero for success or -errno
1583 int drm_plane_create_scaling_filter_property(struct drm_plane *plane,
1584 unsigned int supported_filters)
1586 struct drm_property *prop =
1587 drm_create_scaling_filter_prop(plane->dev, supported_filters);
1590 return PTR_ERR(prop);
1592 drm_object_attach_property(&plane->base, prop,
1593 DRM_SCALING_FILTER_DEFAULT);
1594 plane->scaling_filter_property = prop;
1598 EXPORT_SYMBOL(drm_plane_create_scaling_filter_property);