2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 * Copyright (c) 2008 Red Hat Inc.
6 * DRM core CRTC related functions
8 * Permission to use, copy, modify, distribute, and sell this software and its
9 * documentation for any purpose is hereby granted without fee, provided that
10 * the above copyright notice appear in all copies and that both that copyright
11 * notice and this permission notice appear in supporting documentation, and
12 * that the name of the copyright holders not be used in advertising or
13 * publicity pertaining to distribution of the software without specific,
14 * written prior permission. The copyright holders make no representations
15 * about the suitability of this software for any purpose. It is provided "as
16 * is" without express or implied warranty.
18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
28 * Eric Anholt <eric@anholt.net>
29 * Dave Airlie <airlied@linux.ie>
30 * Jesse Barnes <jesse.barnes@intel.com>
32 #include <linux/ctype.h>
33 #include <linux/list.h>
34 #include <linux/slab.h>
35 #include <linux/export.h>
37 #include <drm/drm_crtc.h>
38 #include <drm/drm_edid.h>
39 #include <drm/drm_fourcc.h>
40 #include <drm/drm_modeset_lock.h>
41 #include <drm/drm_atomic.h>
43 #include "drm_crtc_internal.h"
44 #include "drm_internal.h"
46 static struct drm_framebuffer *
47 internal_framebuffer_create(struct drm_device *dev,
48 const struct drm_mode_fb_cmd2 *r,
49 struct drm_file *file_priv);
51 /* Avoid boilerplate. I'm tired of typing. */
52 #define DRM_ENUM_NAME_FN(fnname, list) \
53 const char *fnname(int val) \
56 for (i = 0; i < ARRAY_SIZE(list); i++) { \
57 if (list[i].type == val) \
58 return list[i].name; \
66 static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
67 { DRM_MODE_DPMS_ON, "On" },
68 { DRM_MODE_DPMS_STANDBY, "Standby" },
69 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
70 { DRM_MODE_DPMS_OFF, "Off" }
73 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
75 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
76 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
77 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
78 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
84 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
85 { DRM_MODE_SCALE_NONE, "None" },
86 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
87 { DRM_MODE_SCALE_CENTER, "Center" },
88 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
91 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
92 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
93 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
94 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
98 * Non-global properties, but "required" for certain connectors.
100 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
101 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
102 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
103 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
106 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
108 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
109 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
110 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
111 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
114 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
115 drm_dvi_i_subconnector_enum_list)
117 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
118 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
119 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
120 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
121 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
122 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
125 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
127 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
128 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
129 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
130 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
131 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
132 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
135 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
136 drm_tv_subconnector_enum_list)
138 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
139 { DRM_MODE_DIRTY_OFF, "Off" },
140 { DRM_MODE_DIRTY_ON, "On" },
141 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
144 struct drm_conn_prop_enum_list {
151 * Connector and encoder types.
153 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
154 { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
155 { DRM_MODE_CONNECTOR_VGA, "VGA" },
156 { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
157 { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
158 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
159 { DRM_MODE_CONNECTOR_Composite, "Composite" },
160 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
161 { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
162 { DRM_MODE_CONNECTOR_Component, "Component" },
163 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
164 { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
165 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
166 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
167 { DRM_MODE_CONNECTOR_TV, "TV" },
168 { DRM_MODE_CONNECTOR_eDP, "eDP" },
169 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
170 { DRM_MODE_CONNECTOR_DSI, "DSI" },
173 static const struct drm_prop_enum_list drm_encoder_enum_list[] = {
174 { DRM_MODE_ENCODER_NONE, "None" },
175 { DRM_MODE_ENCODER_DAC, "DAC" },
176 { DRM_MODE_ENCODER_TMDS, "TMDS" },
177 { DRM_MODE_ENCODER_LVDS, "LVDS" },
178 { DRM_MODE_ENCODER_TVDAC, "TV" },
179 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
180 { DRM_MODE_ENCODER_DSI, "DSI" },
181 { DRM_MODE_ENCODER_DPMST, "DP MST" },
184 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
185 { SubPixelUnknown, "Unknown" },
186 { SubPixelHorizontalRGB, "Horizontal RGB" },
187 { SubPixelHorizontalBGR, "Horizontal BGR" },
188 { SubPixelVerticalRGB, "Vertical RGB" },
189 { SubPixelVerticalBGR, "Vertical BGR" },
190 { SubPixelNone, "None" },
193 void drm_connector_ida_init(void)
197 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
198 ida_init(&drm_connector_enum_list[i].ida);
201 void drm_connector_ida_destroy(void)
205 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
206 ida_destroy(&drm_connector_enum_list[i].ida);
210 * drm_get_connector_status_name - return a string for connector status
211 * @status: connector status to compute name of
213 * In contrast to the other drm_get_*_name functions this one here returns a
214 * const pointer and hence is threadsafe.
216 const char *drm_get_connector_status_name(enum drm_connector_status status)
218 if (status == connector_status_connected)
220 else if (status == connector_status_disconnected)
221 return "disconnected";
225 EXPORT_SYMBOL(drm_get_connector_status_name);
228 * drm_get_subpixel_order_name - return a string for a given subpixel enum
229 * @order: enum of subpixel_order
231 * Note you could abuse this and return something out of bounds, but that
232 * would be a caller error. No unscrubbed user data should make it here.
234 const char *drm_get_subpixel_order_name(enum subpixel_order order)
236 return drm_subpixel_enum_list[order].name;
238 EXPORT_SYMBOL(drm_get_subpixel_order_name);
240 static char printable_char(int c)
242 return isascii(c) && isprint(c) ? c : '?';
246 * drm_get_format_name - return a string for drm fourcc format
247 * @format: format to compute name of
249 * Note that the buffer used by this function is globally shared and owned by
250 * the function itself.
252 * FIXME: This isn't really multithreading safe.
254 const char *drm_get_format_name(uint32_t format)
258 snprintf(buf, sizeof(buf),
259 "%c%c%c%c %s-endian (0x%08x)",
260 printable_char(format & 0xff),
261 printable_char((format >> 8) & 0xff),
262 printable_char((format >> 16) & 0xff),
263 printable_char((format >> 24) & 0x7f),
264 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
269 EXPORT_SYMBOL(drm_get_format_name);
272 * Internal function to assign a slot in the object idr and optionally
273 * register the object into the idr.
275 static int drm_mode_object_get_reg(struct drm_device *dev,
276 struct drm_mode_object *obj,
282 mutex_lock(&dev->mode_config.idr_mutex);
283 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL);
286 * Set up the object linking under the protection of the idr
287 * lock so that other users can't see inconsistent state.
290 obj->type = obj_type;
292 mutex_unlock(&dev->mode_config.idr_mutex);
294 return ret < 0 ? ret : 0;
298 * drm_mode_object_get - allocate a new modeset identifier
300 * @obj: object pointer, used to generate unique ID
301 * @obj_type: object type
303 * Create a unique identifier based on @ptr in @dev's identifier space. Used
304 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix
305 * modeset identifiers are _not_ reference counted. Hence don't use this for
306 * reference counted modeset objects like framebuffers.
309 * Zero on success, error code on failure.
311 int drm_mode_object_get(struct drm_device *dev,
312 struct drm_mode_object *obj, uint32_t obj_type)
314 return drm_mode_object_get_reg(dev, obj, obj_type, true);
317 static void drm_mode_object_register(struct drm_device *dev,
318 struct drm_mode_object *obj)
320 mutex_lock(&dev->mode_config.idr_mutex);
321 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
322 mutex_unlock(&dev->mode_config.idr_mutex);
326 * drm_mode_object_put - free a modeset identifer
328 * @object: object to free
330 * Free @id from @dev's unique identifier pool. Note that despite the _get
331 * postfix modeset identifiers are _not_ reference counted. Hence don't use this
332 * for reference counted modeset objects like framebuffers.
334 void drm_mode_object_put(struct drm_device *dev,
335 struct drm_mode_object *object)
337 mutex_lock(&dev->mode_config.idr_mutex);
338 idr_remove(&dev->mode_config.crtc_idr, object->id);
339 mutex_unlock(&dev->mode_config.idr_mutex);
342 static struct drm_mode_object *_object_find(struct drm_device *dev,
343 uint32_t id, uint32_t type)
345 struct drm_mode_object *obj = NULL;
347 mutex_lock(&dev->mode_config.idr_mutex);
348 obj = idr_find(&dev->mode_config.crtc_idr, id);
349 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
351 if (obj && obj->id != id)
353 /* don't leak out unref'd fb's */
355 (obj->type == DRM_MODE_OBJECT_FB ||
356 obj->type == DRM_MODE_OBJECT_BLOB))
358 mutex_unlock(&dev->mode_config.idr_mutex);
364 * drm_mode_object_find - look up a drm object with static lifetime
366 * @id: id of the mode object
367 * @type: type of the mode object
369 * Note that framebuffers cannot be looked up with this functions - since those
370 * are reference counted, they need special treatment. Even with
371 * DRM_MODE_OBJECT_ANY (although that will simply return NULL
372 * rather than WARN_ON()).
374 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
375 uint32_t id, uint32_t type)
377 struct drm_mode_object *obj = NULL;
379 /* Framebuffers are reference counted and need their own lookup
381 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB);
382 obj = _object_find(dev, id, type);
385 EXPORT_SYMBOL(drm_mode_object_find);
388 * drm_framebuffer_init - initialize a framebuffer
390 * @fb: framebuffer to be initialized
391 * @funcs: ... with these functions
393 * Allocates an ID for the framebuffer's parent mode object, sets its mode
394 * functions & device file and adds it to the master fd list.
397 * This functions publishes the fb and makes it available for concurrent access
398 * by other users. Which means by this point the fb _must_ be fully set up -
399 * since all the fb attributes are invariant over its lifetime, no further
400 * locking but only correct reference counting is required.
403 * Zero on success, error code on failure.
405 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
406 const struct drm_framebuffer_funcs *funcs)
410 mutex_lock(&dev->mode_config.fb_lock);
411 kref_init(&fb->refcount);
412 INIT_LIST_HEAD(&fb->filp_head);
416 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
420 dev->mode_config.num_fb++;
421 list_add(&fb->head, &dev->mode_config.fb_list);
423 mutex_unlock(&dev->mode_config.fb_lock);
427 EXPORT_SYMBOL(drm_framebuffer_init);
429 /* dev->mode_config.fb_lock must be held! */
430 static void __drm_framebuffer_unregister(struct drm_device *dev,
431 struct drm_framebuffer *fb)
433 mutex_lock(&dev->mode_config.idr_mutex);
434 idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
435 mutex_unlock(&dev->mode_config.idr_mutex);
440 static void drm_framebuffer_free(struct kref *kref)
442 struct drm_framebuffer *fb =
443 container_of(kref, struct drm_framebuffer, refcount);
444 struct drm_device *dev = fb->dev;
447 * The lookup idr holds a weak reference, which has not necessarily been
448 * removed at this point. Check for that.
450 mutex_lock(&dev->mode_config.fb_lock);
452 /* Mark fb as reaped and drop idr ref. */
453 __drm_framebuffer_unregister(dev, fb);
455 mutex_unlock(&dev->mode_config.fb_lock);
457 fb->funcs->destroy(fb);
460 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
463 struct drm_mode_object *obj = NULL;
464 struct drm_framebuffer *fb;
466 mutex_lock(&dev->mode_config.idr_mutex);
467 obj = idr_find(&dev->mode_config.crtc_idr, id);
468 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
472 mutex_unlock(&dev->mode_config.idr_mutex);
478 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
480 * @id: id of the fb object
482 * If successful, this grabs an additional reference to the framebuffer -
483 * callers need to make sure to eventually unreference the returned framebuffer
484 * again, using @drm_framebuffer_unreference.
486 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
489 struct drm_framebuffer *fb;
491 mutex_lock(&dev->mode_config.fb_lock);
492 fb = __drm_framebuffer_lookup(dev, id);
494 if (!kref_get_unless_zero(&fb->refcount))
497 mutex_unlock(&dev->mode_config.fb_lock);
501 EXPORT_SYMBOL(drm_framebuffer_lookup);
504 * drm_framebuffer_unreference - unref a framebuffer
505 * @fb: framebuffer to unref
507 * This functions decrements the fb's refcount and frees it if it drops to zero.
509 void drm_framebuffer_unreference(struct drm_framebuffer *fb)
511 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
512 kref_put(&fb->refcount, drm_framebuffer_free);
514 EXPORT_SYMBOL(drm_framebuffer_unreference);
517 * drm_framebuffer_reference - incr the fb refcnt
520 * This functions increments the fb's refcount.
522 void drm_framebuffer_reference(struct drm_framebuffer *fb)
524 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
525 kref_get(&fb->refcount);
527 EXPORT_SYMBOL(drm_framebuffer_reference);
530 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
531 * @fb: fb to unregister
533 * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
534 * those used for fbdev. Note that the caller must hold a reference of it's own,
535 * i.e. the object may not be destroyed through this call (since it'll lead to a
536 * locking inversion).
538 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
540 struct drm_device *dev;
547 mutex_lock(&dev->mode_config.fb_lock);
548 /* Mark fb as reaped and drop idr ref. */
549 __drm_framebuffer_unregister(dev, fb);
550 mutex_unlock(&dev->mode_config.fb_lock);
552 EXPORT_SYMBOL(drm_framebuffer_unregister_private);
555 * drm_framebuffer_cleanup - remove a framebuffer object
556 * @fb: framebuffer to remove
558 * Cleanup framebuffer. This function is intended to be used from the drivers
559 * ->destroy callback. It can also be used to clean up driver private
560 * framebuffers embedded into a larger structure.
562 * Note that this function does not remove the fb from active usuage - if it is
563 * still used anywhere, hilarity can ensue since userspace could call getfb on
564 * the id and get back -EINVAL. Obviously no concern at driver unload time.
566 * Also, the framebuffer will not be removed from the lookup idr - for
567 * user-created framebuffers this will happen in in the rmfb ioctl. For
568 * driver-private objects (e.g. for fbdev) drivers need to explicitly call
569 * drm_framebuffer_unregister_private.
571 void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
573 struct drm_device *dev = fb->dev;
575 mutex_lock(&dev->mode_config.fb_lock);
577 dev->mode_config.num_fb--;
578 mutex_unlock(&dev->mode_config.fb_lock);
580 EXPORT_SYMBOL(drm_framebuffer_cleanup);
583 * drm_framebuffer_remove - remove and unreference a framebuffer object
584 * @fb: framebuffer to remove
586 * Scans all the CRTCs and planes in @dev's mode_config. If they're
587 * using @fb, removes it, setting it to NULL. Then drops the reference to the
588 * passed-in framebuffer. Might take the modeset locks.
590 * Note that this function optimizes the cleanup away if the caller holds the
591 * last reference to the framebuffer. It is also guaranteed to not take the
592 * modeset locks in this case.
594 void drm_framebuffer_remove(struct drm_framebuffer *fb)
596 struct drm_device *dev;
597 struct drm_crtc *crtc;
598 struct drm_plane *plane;
599 struct drm_mode_set set;
607 WARN_ON(!list_empty(&fb->filp_head));
610 * drm ABI mandates that we remove any deleted framebuffers from active
611 * useage. But since most sane clients only remove framebuffers they no
612 * longer need, try to optimize this away.
614 * Since we're holding a reference ourselves, observing a refcount of 1
615 * means that we're the last holder and can skip it. Also, the refcount
616 * can never increase from 1 again, so we don't need any barriers or
619 * Note that userspace could try to race with use and instate a new
620 * usage _after_ we've cleared all current ones. End result will be an
621 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
624 if (atomic_read(&fb->refcount.refcount) > 1) {
625 drm_modeset_lock_all(dev);
626 /* remove from any CRTC */
627 drm_for_each_crtc(crtc, dev) {
628 if (crtc->primary->fb == fb) {
629 /* should turn off the crtc */
630 memset(&set, 0, sizeof(struct drm_mode_set));
633 ret = drm_mode_set_config_internal(&set);
635 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
639 drm_for_each_plane(plane, dev) {
641 drm_plane_force_disable(plane);
643 drm_modeset_unlock_all(dev);
646 drm_framebuffer_unreference(fb);
648 EXPORT_SYMBOL(drm_framebuffer_remove);
650 DEFINE_WW_CLASS(crtc_ww_class);
652 static unsigned int drm_num_crtcs(struct drm_device *dev)
654 unsigned int num = 0;
655 struct drm_crtc *tmp;
657 drm_for_each_crtc(tmp, dev) {
665 * drm_crtc_init_with_planes - Initialise a new CRTC object with
666 * specified primary and cursor planes.
668 * @crtc: CRTC object to init
669 * @primary: Primary plane for CRTC
670 * @cursor: Cursor plane for CRTC
671 * @funcs: callbacks for the new CRTC
672 * @name: printf style format string for the CRTC name, or NULL for default name
674 * Inits a new object created as base part of a driver crtc object.
677 * Zero on success, error code on failure.
679 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
680 struct drm_plane *primary,
681 struct drm_plane *cursor,
682 const struct drm_crtc_funcs *funcs,
683 const char *name, ...)
685 struct drm_mode_config *config = &dev->mode_config;
688 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
689 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
694 drm_modeset_lock_init(&crtc->mutex);
695 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
703 crtc->name = kvasprintf(GFP_KERNEL, name, ap);
706 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
710 drm_mode_object_put(dev, &crtc->base);
714 crtc->base.properties = &crtc->properties;
716 list_add_tail(&crtc->head, &config->crtc_list);
719 crtc->primary = primary;
720 crtc->cursor = cursor;
722 primary->possible_crtcs = 1 << drm_crtc_index(crtc);
724 cursor->possible_crtcs = 1 << drm_crtc_index(crtc);
726 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
727 drm_object_attach_property(&crtc->base, config->prop_active, 0);
728 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
733 EXPORT_SYMBOL(drm_crtc_init_with_planes);
736 * drm_crtc_cleanup - Clean up the core crtc usage
737 * @crtc: CRTC to cleanup
739 * This function cleans up @crtc and removes it from the DRM mode setting
740 * core. Note that the function does *not* free the crtc structure itself,
741 * this is the responsibility of the caller.
743 void drm_crtc_cleanup(struct drm_crtc *crtc)
745 struct drm_device *dev = crtc->dev;
747 kfree(crtc->gamma_store);
748 crtc->gamma_store = NULL;
750 drm_modeset_lock_fini(&crtc->mutex);
752 drm_mode_object_put(dev, &crtc->base);
753 list_del(&crtc->head);
754 dev->mode_config.num_crtc--;
756 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
757 if (crtc->state && crtc->funcs->atomic_destroy_state)
758 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
762 memset(crtc, 0, sizeof(*crtc));
764 EXPORT_SYMBOL(drm_crtc_cleanup);
767 * drm_crtc_index - find the index of a registered CRTC
768 * @crtc: CRTC to find index for
770 * Given a registered CRTC, return the index of that CRTC within a DRM
771 * device's list of CRTCs.
773 unsigned int drm_crtc_index(struct drm_crtc *crtc)
775 unsigned int index = 0;
776 struct drm_crtc *tmp;
778 drm_for_each_crtc(tmp, crtc->dev) {
787 EXPORT_SYMBOL(drm_crtc_index);
790 * drm_mode_remove - remove and free a mode
791 * @connector: connector list to modify
792 * @mode: mode to remove
794 * Remove @mode from @connector's mode list, then free it.
796 static void drm_mode_remove(struct drm_connector *connector,
797 struct drm_display_mode *mode)
799 list_del(&mode->head);
800 drm_mode_destroy(connector->dev, mode);
804 * drm_display_info_set_bus_formats - set the supported bus formats
805 * @info: display info to store bus formats in
806 * @formats: array containing the supported bus formats
807 * @num_formats: the number of entries in the fmts array
809 * Store the supported bus formats in display info structure.
810 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
811 * a full list of available formats.
813 int drm_display_info_set_bus_formats(struct drm_display_info *info,
815 unsigned int num_formats)
819 if (!formats && num_formats)
822 if (formats && num_formats) {
823 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
829 kfree(info->bus_formats);
830 info->bus_formats = fmts;
831 info->num_bus_formats = num_formats;
835 EXPORT_SYMBOL(drm_display_info_set_bus_formats);
838 * drm_connector_get_cmdline_mode - reads the user's cmdline mode
839 * @connector: connector to quwery
841 * The kernel supports per-connector configration of its consoles through
842 * use of the video= parameter. This function parses that option and
843 * extracts the user's specified mode (or enable/disable status) for a
844 * particular connector. This is typically only used during the early fbdev
847 static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
849 struct drm_cmdline_mode *mode = &connector->cmdline_mode;
852 if (fb_get_options(connector->name, &option))
855 if (!drm_mode_parse_command_line_for_connector(option,
863 switch (mode->force) {
867 case DRM_FORCE_ON_DIGITAL:
876 DRM_INFO("forcing %s connector %s\n", connector->name, s);
877 connector->force = mode->force;
880 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
882 mode->xres, mode->yres,
883 mode->refresh_specified ? mode->refresh : 60,
884 mode->rb ? " reduced blanking" : "",
885 mode->margins ? " with margins" : "",
886 mode->interlace ? " interlaced" : "");
890 * drm_connector_init - Init a preallocated connector
892 * @connector: the connector to init
893 * @funcs: callbacks for this connector
894 * @connector_type: user visible type of the connector
896 * Initialises a preallocated connector. Connectors should be
897 * subclassed as part of driver connector objects.
900 * Zero on success, error code on failure.
902 int drm_connector_init(struct drm_device *dev,
903 struct drm_connector *connector,
904 const struct drm_connector_funcs *funcs,
907 struct drm_mode_config *config = &dev->mode_config;
909 struct ida *connector_ida =
910 &drm_connector_enum_list[connector_type].ida;
912 drm_modeset_lock_all(dev);
914 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false);
918 connector->base.properties = &connector->properties;
919 connector->dev = dev;
920 connector->funcs = funcs;
921 connector->connector_type = connector_type;
922 connector->connector_type_id =
923 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
924 if (connector->connector_type_id < 0) {
925 ret = connector->connector_type_id;
929 kasprintf(GFP_KERNEL, "%s-%d",
930 drm_connector_enum_list[connector_type].name,
931 connector->connector_type_id);
932 if (!connector->name) {
937 INIT_LIST_HEAD(&connector->probed_modes);
938 INIT_LIST_HEAD(&connector->modes);
939 connector->edid_blob_ptr = NULL;
940 connector->status = connector_status_unknown;
942 drm_connector_get_cmdline_mode(connector);
944 /* We should add connectors at the end to avoid upsetting the connector
946 list_add_tail(&connector->head, &config->connector_list);
947 config->num_connector++;
949 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
950 drm_object_attach_property(&connector->base,
951 config->edid_property,
954 drm_object_attach_property(&connector->base,
955 config->dpms_property, 0);
957 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
958 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
961 connector->debugfs_entry = NULL;
965 drm_mode_object_put(dev, &connector->base);
968 drm_modeset_unlock_all(dev);
972 EXPORT_SYMBOL(drm_connector_init);
975 * drm_connector_cleanup - cleans up an initialised connector
976 * @connector: connector to cleanup
978 * Cleans up the connector but doesn't free the object.
980 void drm_connector_cleanup(struct drm_connector *connector)
982 struct drm_device *dev = connector->dev;
983 struct drm_display_mode *mode, *t;
985 if (connector->tile_group) {
986 drm_mode_put_tile_group(dev, connector->tile_group);
987 connector->tile_group = NULL;
990 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
991 drm_mode_remove(connector, mode);
993 list_for_each_entry_safe(mode, t, &connector->modes, head)
994 drm_mode_remove(connector, mode);
996 ida_remove(&drm_connector_enum_list[connector->connector_type].ida,
997 connector->connector_type_id);
999 kfree(connector->display_info.bus_formats);
1000 drm_mode_object_put(dev, &connector->base);
1001 kfree(connector->name);
1002 connector->name = NULL;
1003 list_del(&connector->head);
1004 dev->mode_config.num_connector--;
1006 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
1007 if (connector->state && connector->funcs->atomic_destroy_state)
1008 connector->funcs->atomic_destroy_state(connector,
1011 memset(connector, 0, sizeof(*connector));
1013 EXPORT_SYMBOL(drm_connector_cleanup);
1016 * drm_connector_index - find the index of a registered connector
1017 * @connector: connector to find index for
1019 * Given a registered connector, return the index of that connector within a DRM
1020 * device's list of connectors.
1022 unsigned int drm_connector_index(struct drm_connector *connector)
1024 unsigned int index = 0;
1025 struct drm_connector *tmp;
1026 struct drm_mode_config *config = &connector->dev->mode_config;
1028 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
1030 drm_for_each_connector(tmp, connector->dev) {
1031 if (tmp == connector)
1039 EXPORT_SYMBOL(drm_connector_index);
1042 * drm_connector_register - register a connector
1043 * @connector: the connector to register
1045 * Register userspace interfaces for a connector
1048 * Zero on success, error code on failure.
1050 int drm_connector_register(struct drm_connector *connector)
1054 drm_mode_object_register(connector->dev, &connector->base);
1056 ret = drm_sysfs_connector_add(connector);
1060 ret = drm_debugfs_connector_add(connector);
1062 drm_sysfs_connector_remove(connector);
1068 EXPORT_SYMBOL(drm_connector_register);
1071 * drm_connector_unregister - unregister a connector
1072 * @connector: the connector to unregister
1074 * Unregister userspace interfaces for a connector
1076 void drm_connector_unregister(struct drm_connector *connector)
1078 drm_sysfs_connector_remove(connector);
1079 drm_debugfs_connector_remove(connector);
1081 EXPORT_SYMBOL(drm_connector_unregister);
1085 * drm_connector_unplug_all - unregister connector userspace interfaces
1088 * This function unregisters all connector userspace interfaces in sysfs. Should
1089 * be call when the device is disconnected, e.g. from an usb driver's
1090 * ->disconnect callback.
1092 void drm_connector_unplug_all(struct drm_device *dev)
1094 struct drm_connector *connector;
1096 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */
1097 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1098 drm_connector_unregister(connector);
1101 EXPORT_SYMBOL(drm_connector_unplug_all);
1104 * drm_encoder_init - Init a preallocated encoder
1106 * @encoder: the encoder to init
1107 * @funcs: callbacks for this encoder
1108 * @encoder_type: user visible type of the encoder
1109 * @name: printf style format string for the encoder name, or NULL for default name
1111 * Initialises a preallocated encoder. Encoder should be
1112 * subclassed as part of driver encoder objects.
1115 * Zero on success, error code on failure.
1117 int drm_encoder_init(struct drm_device *dev,
1118 struct drm_encoder *encoder,
1119 const struct drm_encoder_funcs *funcs,
1120 int encoder_type, const char *name, ...)
1124 drm_modeset_lock_all(dev);
1126 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
1131 encoder->encoder_type = encoder_type;
1132 encoder->funcs = funcs;
1137 encoder->name = kvasprintf(GFP_KERNEL, name, ap);
1140 encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
1141 drm_encoder_enum_list[encoder_type].name,
1144 if (!encoder->name) {
1149 list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
1150 dev->mode_config.num_encoder++;
1154 drm_mode_object_put(dev, &encoder->base);
1157 drm_modeset_unlock_all(dev);
1161 EXPORT_SYMBOL(drm_encoder_init);
1164 * drm_encoder_index - find the index of a registered encoder
1165 * @encoder: encoder to find index for
1167 * Given a registered encoder, return the index of that encoder within a DRM
1168 * device's list of encoders.
1170 unsigned int drm_encoder_index(struct drm_encoder *encoder)
1172 unsigned int index = 0;
1173 struct drm_encoder *tmp;
1175 drm_for_each_encoder(tmp, encoder->dev) {
1184 EXPORT_SYMBOL(drm_encoder_index);
1187 * drm_encoder_cleanup - cleans up an initialised encoder
1188 * @encoder: encoder to cleanup
1190 * Cleans up the encoder but doesn't free the object.
1192 void drm_encoder_cleanup(struct drm_encoder *encoder)
1194 struct drm_device *dev = encoder->dev;
1196 drm_modeset_lock_all(dev);
1197 drm_mode_object_put(dev, &encoder->base);
1198 kfree(encoder->name);
1199 list_del(&encoder->head);
1200 dev->mode_config.num_encoder--;
1201 drm_modeset_unlock_all(dev);
1203 memset(encoder, 0, sizeof(*encoder));
1205 EXPORT_SYMBOL(drm_encoder_cleanup);
1207 static unsigned int drm_num_planes(struct drm_device *dev)
1209 unsigned int num = 0;
1210 struct drm_plane *tmp;
1212 drm_for_each_plane(tmp, dev) {
1220 * drm_universal_plane_init - Initialize a new universal plane object
1222 * @plane: plane object to init
1223 * @possible_crtcs: bitmask of possible CRTCs
1224 * @funcs: callbacks for the new plane
1225 * @formats: array of supported formats (%DRM_FORMAT_*)
1226 * @format_count: number of elements in @formats
1227 * @type: type of plane (overlay, primary, cursor)
1228 * @name: printf style format string for the plane name, or NULL for default name
1230 * Initializes a plane object of type @type.
1233 * Zero on success, error code on failure.
1235 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
1236 unsigned long possible_crtcs,
1237 const struct drm_plane_funcs *funcs,
1238 const uint32_t *formats, unsigned int format_count,
1239 enum drm_plane_type type,
1240 const char *name, ...)
1242 struct drm_mode_config *config = &dev->mode_config;
1245 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
1249 drm_modeset_lock_init(&plane->mutex);
1251 plane->base.properties = &plane->properties;
1253 plane->funcs = funcs;
1254 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
1256 if (!plane->format_types) {
1257 DRM_DEBUG_KMS("out of memory when allocating plane\n");
1258 drm_mode_object_put(dev, &plane->base);
1266 plane->name = kvasprintf(GFP_KERNEL, name, ap);
1269 plane->name = kasprintf(GFP_KERNEL, "plane-%d",
1270 drm_num_planes(dev));
1273 kfree(plane->format_types);
1274 drm_mode_object_put(dev, &plane->base);
1278 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
1279 plane->format_count = format_count;
1280 plane->possible_crtcs = possible_crtcs;
1283 list_add_tail(&plane->head, &config->plane_list);
1284 config->num_total_plane++;
1285 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1286 config->num_overlay_plane++;
1288 drm_object_attach_property(&plane->base,
1289 config->plane_type_property,
1292 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
1293 drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
1294 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
1295 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
1296 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
1297 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
1298 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
1299 drm_object_attach_property(&plane->base, config->prop_src_x, 0);
1300 drm_object_attach_property(&plane->base, config->prop_src_y, 0);
1301 drm_object_attach_property(&plane->base, config->prop_src_w, 0);
1302 drm_object_attach_property(&plane->base, config->prop_src_h, 0);
1307 EXPORT_SYMBOL(drm_universal_plane_init);
1310 * drm_plane_init - Initialize a legacy plane
1312 * @plane: plane object to init
1313 * @possible_crtcs: bitmask of possible CRTCs
1314 * @funcs: callbacks for the new plane
1315 * @formats: array of supported formats (%DRM_FORMAT_*)
1316 * @format_count: number of elements in @formats
1317 * @is_primary: plane type (primary vs overlay)
1319 * Legacy API to initialize a DRM plane.
1321 * New drivers should call drm_universal_plane_init() instead.
1324 * Zero on success, error code on failure.
1326 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
1327 unsigned long possible_crtcs,
1328 const struct drm_plane_funcs *funcs,
1329 const uint32_t *formats, unsigned int format_count,
1332 enum drm_plane_type type;
1334 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
1335 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
1336 formats, format_count, type, NULL);
1338 EXPORT_SYMBOL(drm_plane_init);
1341 * drm_plane_cleanup - Clean up the core plane usage
1342 * @plane: plane to cleanup
1344 * This function cleans up @plane and removes it from the DRM mode setting
1345 * core. Note that the function does *not* free the plane structure itself,
1346 * this is the responsibility of the caller.
1348 void drm_plane_cleanup(struct drm_plane *plane)
1350 struct drm_device *dev = plane->dev;
1352 drm_modeset_lock_all(dev);
1353 kfree(plane->format_types);
1354 drm_mode_object_put(dev, &plane->base);
1356 BUG_ON(list_empty(&plane->head));
1358 list_del(&plane->head);
1359 dev->mode_config.num_total_plane--;
1360 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1361 dev->mode_config.num_overlay_plane--;
1362 drm_modeset_unlock_all(dev);
1364 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
1365 if (plane->state && plane->funcs->atomic_destroy_state)
1366 plane->funcs->atomic_destroy_state(plane, plane->state);
1370 memset(plane, 0, sizeof(*plane));
1372 EXPORT_SYMBOL(drm_plane_cleanup);
1375 * drm_plane_index - find the index of a registered plane
1376 * @plane: plane to find index for
1378 * Given a registered plane, return the index of that CRTC within a DRM
1379 * device's list of planes.
1381 unsigned int drm_plane_index(struct drm_plane *plane)
1383 unsigned int index = 0;
1384 struct drm_plane *tmp;
1386 drm_for_each_plane(tmp, plane->dev) {
1395 EXPORT_SYMBOL(drm_plane_index);
1398 * drm_plane_from_index - find the registered plane at an index
1400 * @idx: index of registered plane to find for
1402 * Given a plane index, return the registered plane from DRM device's
1403 * list of planes with matching index.
1406 drm_plane_from_index(struct drm_device *dev, int idx)
1408 struct drm_plane *plane;
1411 drm_for_each_plane(plane, dev) {
1418 EXPORT_SYMBOL(drm_plane_from_index);
1421 * drm_plane_force_disable - Forcibly disable a plane
1422 * @plane: plane to disable
1424 * Forces the plane to be disabled.
1426 * Used when the plane's current framebuffer is destroyed,
1427 * and when restoring fbdev mode.
1429 void drm_plane_force_disable(struct drm_plane *plane)
1436 plane->old_fb = plane->fb;
1437 ret = plane->funcs->disable_plane(plane);
1439 DRM_ERROR("failed to disable plane with busy fb\n");
1440 plane->old_fb = NULL;
1443 /* disconnect the plane from the fb and crtc: */
1444 drm_framebuffer_unreference(plane->old_fb);
1445 plane->old_fb = NULL;
1449 EXPORT_SYMBOL(drm_plane_force_disable);
1451 static int drm_mode_create_standard_properties(struct drm_device *dev)
1453 struct drm_property *prop;
1456 * Standard properties (apply to all connectors)
1458 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
1459 DRM_MODE_PROP_IMMUTABLE,
1463 dev->mode_config.edid_property = prop;
1465 prop = drm_property_create_enum(dev, 0,
1466 "DPMS", drm_dpms_enum_list,
1467 ARRAY_SIZE(drm_dpms_enum_list));
1470 dev->mode_config.dpms_property = prop;
1472 prop = drm_property_create(dev,
1473 DRM_MODE_PROP_BLOB |
1474 DRM_MODE_PROP_IMMUTABLE,
1478 dev->mode_config.path_property = prop;
1480 prop = drm_property_create(dev,
1481 DRM_MODE_PROP_BLOB |
1482 DRM_MODE_PROP_IMMUTABLE,
1486 dev->mode_config.tile_property = prop;
1488 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1489 "type", drm_plane_type_enum_list,
1490 ARRAY_SIZE(drm_plane_type_enum_list));
1493 dev->mode_config.plane_type_property = prop;
1495 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1496 "SRC_X", 0, UINT_MAX);
1499 dev->mode_config.prop_src_x = prop;
1501 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1502 "SRC_Y", 0, UINT_MAX);
1505 dev->mode_config.prop_src_y = prop;
1507 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1508 "SRC_W", 0, UINT_MAX);
1511 dev->mode_config.prop_src_w = prop;
1513 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1514 "SRC_H", 0, UINT_MAX);
1517 dev->mode_config.prop_src_h = prop;
1519 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
1520 "CRTC_X", INT_MIN, INT_MAX);
1523 dev->mode_config.prop_crtc_x = prop;
1525 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
1526 "CRTC_Y", INT_MIN, INT_MAX);
1529 dev->mode_config.prop_crtc_y = prop;
1531 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1532 "CRTC_W", 0, INT_MAX);
1535 dev->mode_config.prop_crtc_w = prop;
1537 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1538 "CRTC_H", 0, INT_MAX);
1541 dev->mode_config.prop_crtc_h = prop;
1543 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
1544 "FB_ID", DRM_MODE_OBJECT_FB);
1547 dev->mode_config.prop_fb_id = prop;
1549 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
1550 "CRTC_ID", DRM_MODE_OBJECT_CRTC);
1553 dev->mode_config.prop_crtc_id = prop;
1555 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
1559 dev->mode_config.prop_active = prop;
1561 prop = drm_property_create(dev,
1562 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
1566 dev->mode_config.prop_mode_id = prop;
1572 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1575 * Called by a driver the first time a DVI-I connector is made.
1577 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1579 struct drm_property *dvi_i_selector;
1580 struct drm_property *dvi_i_subconnector;
1582 if (dev->mode_config.dvi_i_select_subconnector_property)
1586 drm_property_create_enum(dev, 0,
1587 "select subconnector",
1588 drm_dvi_i_select_enum_list,
1589 ARRAY_SIZE(drm_dvi_i_select_enum_list));
1590 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1592 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1594 drm_dvi_i_subconnector_enum_list,
1595 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1596 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1600 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1603 * drm_create_tv_properties - create TV specific connector properties
1605 * @num_modes: number of different TV formats (modes) supported
1606 * @modes: array of pointers to strings containing name of each format
1608 * Called by a driver's TV initialization routine, this function creates
1609 * the TV specific connector properties for a given device. Caller is
1610 * responsible for allocating a list of format names and passing them to
1613 int drm_mode_create_tv_properties(struct drm_device *dev,
1614 unsigned int num_modes,
1615 const char * const modes[])
1617 struct drm_property *tv_selector;
1618 struct drm_property *tv_subconnector;
1621 if (dev->mode_config.tv_select_subconnector_property)
1625 * Basic connector properties
1627 tv_selector = drm_property_create_enum(dev, 0,
1628 "select subconnector",
1629 drm_tv_select_enum_list,
1630 ARRAY_SIZE(drm_tv_select_enum_list));
1634 dev->mode_config.tv_select_subconnector_property = tv_selector;
1637 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1639 drm_tv_subconnector_enum_list,
1640 ARRAY_SIZE(drm_tv_subconnector_enum_list));
1641 if (!tv_subconnector)
1643 dev->mode_config.tv_subconnector_property = tv_subconnector;
1646 * Other, TV specific properties: margins & TV modes.
1648 dev->mode_config.tv_left_margin_property =
1649 drm_property_create_range(dev, 0, "left margin", 0, 100);
1650 if (!dev->mode_config.tv_left_margin_property)
1653 dev->mode_config.tv_right_margin_property =
1654 drm_property_create_range(dev, 0, "right margin", 0, 100);
1655 if (!dev->mode_config.tv_right_margin_property)
1658 dev->mode_config.tv_top_margin_property =
1659 drm_property_create_range(dev, 0, "top margin", 0, 100);
1660 if (!dev->mode_config.tv_top_margin_property)
1663 dev->mode_config.tv_bottom_margin_property =
1664 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1665 if (!dev->mode_config.tv_bottom_margin_property)
1668 dev->mode_config.tv_mode_property =
1669 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1671 if (!dev->mode_config.tv_mode_property)
1674 for (i = 0; i < num_modes; i++)
1675 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
1678 dev->mode_config.tv_brightness_property =
1679 drm_property_create_range(dev, 0, "brightness", 0, 100);
1680 if (!dev->mode_config.tv_brightness_property)
1683 dev->mode_config.tv_contrast_property =
1684 drm_property_create_range(dev, 0, "contrast", 0, 100);
1685 if (!dev->mode_config.tv_contrast_property)
1688 dev->mode_config.tv_flicker_reduction_property =
1689 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1690 if (!dev->mode_config.tv_flicker_reduction_property)
1693 dev->mode_config.tv_overscan_property =
1694 drm_property_create_range(dev, 0, "overscan", 0, 100);
1695 if (!dev->mode_config.tv_overscan_property)
1698 dev->mode_config.tv_saturation_property =
1699 drm_property_create_range(dev, 0, "saturation", 0, 100);
1700 if (!dev->mode_config.tv_saturation_property)
1703 dev->mode_config.tv_hue_property =
1704 drm_property_create_range(dev, 0, "hue", 0, 100);
1705 if (!dev->mode_config.tv_hue_property)
1712 EXPORT_SYMBOL(drm_mode_create_tv_properties);
1715 * drm_mode_create_scaling_mode_property - create scaling mode property
1718 * Called by a driver the first time it's needed, must be attached to desired
1721 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1723 struct drm_property *scaling_mode;
1725 if (dev->mode_config.scaling_mode_property)
1729 drm_property_create_enum(dev, 0, "scaling mode",
1730 drm_scaling_mode_enum_list,
1731 ARRAY_SIZE(drm_scaling_mode_enum_list));
1733 dev->mode_config.scaling_mode_property = scaling_mode;
1737 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1740 * drm_mode_create_aspect_ratio_property - create aspect ratio property
1743 * Called by a driver the first time it's needed, must be attached to desired
1747 * Zero on success, negative errno on failure.
1749 int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1751 if (dev->mode_config.aspect_ratio_property)
1754 dev->mode_config.aspect_ratio_property =
1755 drm_property_create_enum(dev, 0, "aspect ratio",
1756 drm_aspect_ratio_enum_list,
1757 ARRAY_SIZE(drm_aspect_ratio_enum_list));
1759 if (dev->mode_config.aspect_ratio_property == NULL)
1764 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1767 * drm_mode_create_dirty_property - create dirty property
1770 * Called by a driver the first time it's needed, must be attached to desired
1773 int drm_mode_create_dirty_info_property(struct drm_device *dev)
1775 struct drm_property *dirty_info;
1777 if (dev->mode_config.dirty_info_property)
1781 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1783 drm_dirty_info_enum_list,
1784 ARRAY_SIZE(drm_dirty_info_enum_list));
1785 dev->mode_config.dirty_info_property = dirty_info;
1789 EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
1792 * drm_mode_create_suggested_offset_properties - create suggests offset properties
1795 * Create the the suggested x/y offset property for connectors.
1797 int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1799 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1802 dev->mode_config.suggested_x_property =
1803 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1805 dev->mode_config.suggested_y_property =
1806 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1808 if (dev->mode_config.suggested_x_property == NULL ||
1809 dev->mode_config.suggested_y_property == NULL)
1813 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1816 * drm_mode_getresources - get graphics configuration
1817 * @dev: drm device for the ioctl
1818 * @data: data pointer for the ioctl
1819 * @file_priv: drm file for the ioctl call
1821 * Construct a set of configuration description structures and return
1822 * them to the user, including CRTC, connector and framebuffer configuration.
1824 * Called by the user via ioctl.
1827 * Zero on success, negative errno on failure.
1829 int drm_mode_getresources(struct drm_device *dev, void *data,
1830 struct drm_file *file_priv)
1832 struct drm_mode_card_res *card_res = data;
1833 struct list_head *lh;
1834 struct drm_framebuffer *fb;
1835 struct drm_connector *connector;
1836 struct drm_crtc *crtc;
1837 struct drm_encoder *encoder;
1839 int connector_count = 0;
1842 int encoder_count = 0;
1844 uint32_t __user *fb_id;
1845 uint32_t __user *crtc_id;
1846 uint32_t __user *connector_id;
1847 uint32_t __user *encoder_id;
1849 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1853 mutex_lock(&file_priv->fbs_lock);
1855 * For the non-control nodes we need to limit the list of resources
1856 * by IDs in the group list for this node
1858 list_for_each(lh, &file_priv->fbs)
1861 /* handle this in 4 parts */
1863 if (card_res->count_fbs >= fb_count) {
1865 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
1866 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
1867 if (put_user(fb->base.id, fb_id + copied)) {
1868 mutex_unlock(&file_priv->fbs_lock);
1874 card_res->count_fbs = fb_count;
1875 mutex_unlock(&file_priv->fbs_lock);
1877 /* mode_config.mutex protects the connector list against e.g. DP MST
1878 * connector hot-adding. CRTC/Plane lists are invariant. */
1879 mutex_lock(&dev->mode_config.mutex);
1880 drm_for_each_crtc(crtc, dev)
1883 drm_for_each_connector(connector, dev)
1886 drm_for_each_encoder(encoder, dev)
1889 card_res->max_height = dev->mode_config.max_height;
1890 card_res->min_height = dev->mode_config.min_height;
1891 card_res->max_width = dev->mode_config.max_width;
1892 card_res->min_width = dev->mode_config.min_width;
1895 if (card_res->count_crtcs >= crtc_count) {
1897 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
1898 drm_for_each_crtc(crtc, dev) {
1899 DRM_DEBUG_KMS("[CRTC:%d:%s]\n",
1900 crtc->base.id, crtc->name);
1901 if (put_user(crtc->base.id, crtc_id + copied)) {
1908 card_res->count_crtcs = crtc_count;
1911 if (card_res->count_encoders >= encoder_count) {
1913 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
1914 drm_for_each_encoder(encoder, dev) {
1915 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
1917 if (put_user(encoder->base.id, encoder_id +
1925 card_res->count_encoders = encoder_count;
1928 if (card_res->count_connectors >= connector_count) {
1930 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
1931 drm_for_each_connector(connector, dev) {
1932 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
1935 if (put_user(connector->base.id,
1936 connector_id + copied)) {
1943 card_res->count_connectors = connector_count;
1945 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
1946 card_res->count_connectors, card_res->count_encoders);
1949 mutex_unlock(&dev->mode_config.mutex);
1954 * drm_mode_getcrtc - get CRTC configuration
1955 * @dev: drm device for the ioctl
1956 * @data: data pointer for the ioctl
1957 * @file_priv: drm file for the ioctl call
1959 * Construct a CRTC configuration structure to return to the user.
1961 * Called by the user via ioctl.
1964 * Zero on success, negative errno on failure.
1966 int drm_mode_getcrtc(struct drm_device *dev,
1967 void *data, struct drm_file *file_priv)
1969 struct drm_mode_crtc *crtc_resp = data;
1970 struct drm_crtc *crtc;
1972 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1975 crtc = drm_crtc_find(dev, crtc_resp->crtc_id);
1979 drm_modeset_lock_crtc(crtc, crtc->primary);
1980 crtc_resp->gamma_size = crtc->gamma_size;
1981 if (crtc->primary->fb)
1982 crtc_resp->fb_id = crtc->primary->fb->base.id;
1984 crtc_resp->fb_id = 0;
1987 crtc_resp->x = crtc->primary->state->src_x >> 16;
1988 crtc_resp->y = crtc->primary->state->src_y >> 16;
1989 if (crtc->state->enable) {
1990 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
1991 crtc_resp->mode_valid = 1;
1994 crtc_resp->mode_valid = 0;
1997 crtc_resp->x = crtc->x;
1998 crtc_resp->y = crtc->y;
1999 if (crtc->enabled) {
2000 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
2001 crtc_resp->mode_valid = 1;
2004 crtc_resp->mode_valid = 0;
2007 drm_modeset_unlock_crtc(crtc);
2012 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
2013 const struct drm_file *file_priv)
2016 * If user-space hasn't configured the driver to expose the stereo 3D
2017 * modes, don't expose them.
2019 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
2025 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
2027 /* For atomic drivers only state objects are synchronously updated and
2028 * protected by modeset locks, so check those first. */
2029 if (connector->state)
2030 return connector->state->best_encoder;
2031 return connector->encoder;
2034 /* helper for getconnector and getproperties ioctls */
2035 static int get_properties(struct drm_mode_object *obj, bool atomic,
2036 uint32_t __user *prop_ptr, uint64_t __user *prop_values,
2037 uint32_t *arg_count_props)
2042 props_count = obj->properties->count;
2044 props_count -= obj->properties->atomic_count;
2046 if ((*arg_count_props >= props_count) && props_count) {
2047 for (i = 0, copied = 0; copied < props_count; i++) {
2048 struct drm_property *prop = obj->properties->properties[i];
2051 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
2054 ret = drm_object_property_get_value(obj, prop, &val);
2058 if (put_user(prop->base.id, prop_ptr + copied))
2061 if (put_user(val, prop_values + copied))
2067 *arg_count_props = props_count;
2073 * drm_mode_getconnector - get connector configuration
2074 * @dev: drm device for the ioctl
2075 * @data: data pointer for the ioctl
2076 * @file_priv: drm file for the ioctl call
2078 * Construct a connector configuration structure to return to the user.
2080 * Called by the user via ioctl.
2083 * Zero on success, negative errno on failure.
2085 int drm_mode_getconnector(struct drm_device *dev, void *data,
2086 struct drm_file *file_priv)
2088 struct drm_mode_get_connector *out_resp = data;
2089 struct drm_connector *connector;
2090 struct drm_encoder *encoder;
2091 struct drm_display_mode *mode;
2093 int encoders_count = 0;
2097 struct drm_mode_modeinfo u_mode;
2098 struct drm_mode_modeinfo __user *mode_ptr;
2099 uint32_t __user *encoder_ptr;
2101 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2104 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
2106 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
2108 mutex_lock(&dev->mode_config.mutex);
2110 connector = drm_connector_find(dev, out_resp->connector_id);
2116 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
2117 if (connector->encoder_ids[i] != 0)
2120 if (out_resp->count_modes == 0) {
2121 connector->funcs->fill_modes(connector,
2122 dev->mode_config.max_width,
2123 dev->mode_config.max_height);
2126 /* delayed so we get modes regardless of pre-fill_modes state */
2127 list_for_each_entry(mode, &connector->modes, head)
2128 if (drm_mode_expose_to_userspace(mode, file_priv))
2131 out_resp->connector_id = connector->base.id;
2132 out_resp->connector_type = connector->connector_type;
2133 out_resp->connector_type_id = connector->connector_type_id;
2134 out_resp->mm_width = connector->display_info.width_mm;
2135 out_resp->mm_height = connector->display_info.height_mm;
2136 out_resp->subpixel = connector->display_info.subpixel_order;
2137 out_resp->connection = connector->status;
2139 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2140 encoder = drm_connector_get_encoder(connector);
2142 out_resp->encoder_id = encoder->base.id;
2144 out_resp->encoder_id = 0;
2147 * This ioctl is called twice, once to determine how much space is
2148 * needed, and the 2nd time to fill it.
2150 if ((out_resp->count_modes >= mode_count) && mode_count) {
2152 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
2153 list_for_each_entry(mode, &connector->modes, head) {
2154 if (!drm_mode_expose_to_userspace(mode, file_priv))
2157 drm_mode_convert_to_umode(&u_mode, mode);
2158 if (copy_to_user(mode_ptr + copied,
2159 &u_mode, sizeof(u_mode))) {
2166 out_resp->count_modes = mode_count;
2168 ret = get_properties(&connector->base, file_priv->atomic,
2169 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
2170 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
2171 &out_resp->count_props);
2175 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
2177 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
2178 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
2179 if (connector->encoder_ids[i] != 0) {
2180 if (put_user(connector->encoder_ids[i],
2181 encoder_ptr + copied)) {
2189 out_resp->count_encoders = encoders_count;
2192 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2195 mutex_unlock(&dev->mode_config.mutex);
2200 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder)
2202 struct drm_connector *connector;
2203 struct drm_device *dev = encoder->dev;
2204 bool uses_atomic = false;
2206 /* For atomic drivers only state objects are synchronously updated and
2207 * protected by modeset locks, so check those first. */
2208 drm_for_each_connector(connector, dev) {
2209 if (!connector->state)
2214 if (connector->state->best_encoder != encoder)
2217 return connector->state->crtc;
2220 /* Don't return stale data (e.g. pending async disable). */
2224 return encoder->crtc;
2228 * drm_mode_getencoder - get encoder configuration
2229 * @dev: drm device for the ioctl
2230 * @data: data pointer for the ioctl
2231 * @file_priv: drm file for the ioctl call
2233 * Construct a encoder configuration structure to return to the user.
2235 * Called by the user via ioctl.
2238 * Zero on success, negative errno on failure.
2240 int drm_mode_getencoder(struct drm_device *dev, void *data,
2241 struct drm_file *file_priv)
2243 struct drm_mode_get_encoder *enc_resp = data;
2244 struct drm_encoder *encoder;
2245 struct drm_crtc *crtc;
2247 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2250 encoder = drm_encoder_find(dev, enc_resp->encoder_id);
2254 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2255 crtc = drm_encoder_get_crtc(encoder);
2257 enc_resp->crtc_id = crtc->base.id;
2259 enc_resp->crtc_id = 0;
2260 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2262 enc_resp->encoder_type = encoder->encoder_type;
2263 enc_resp->encoder_id = encoder->base.id;
2264 enc_resp->possible_crtcs = encoder->possible_crtcs;
2265 enc_resp->possible_clones = encoder->possible_clones;
2271 * drm_mode_getplane_res - enumerate all plane resources
2274 * @file_priv: DRM file info
2276 * Construct a list of plane ids to return to the user.
2278 * Called by the user via ioctl.
2281 * Zero on success, negative errno on failure.
2283 int drm_mode_getplane_res(struct drm_device *dev, void *data,
2284 struct drm_file *file_priv)
2286 struct drm_mode_get_plane_res *plane_resp = data;
2287 struct drm_mode_config *config;
2288 struct drm_plane *plane;
2289 uint32_t __user *plane_ptr;
2291 unsigned num_planes;
2293 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2296 config = &dev->mode_config;
2298 if (file_priv->universal_planes)
2299 num_planes = config->num_total_plane;
2301 num_planes = config->num_overlay_plane;
2304 * This ioctl is called twice, once to determine how much space is
2305 * needed, and the 2nd time to fill it.
2308 (plane_resp->count_planes >= num_planes)) {
2309 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
2311 /* Plane lists are invariant, no locking needed. */
2312 drm_for_each_plane(plane, dev) {
2314 * Unless userspace set the 'universal planes'
2315 * capability bit, only advertise overlays.
2317 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
2318 !file_priv->universal_planes)
2321 if (put_user(plane->base.id, plane_ptr + copied))
2326 plane_resp->count_planes = num_planes;
2332 * drm_mode_getplane - get plane configuration
2335 * @file_priv: DRM file info
2337 * Construct a plane configuration structure to return to the user.
2339 * Called by the user via ioctl.
2342 * Zero on success, negative errno on failure.
2344 int drm_mode_getplane(struct drm_device *dev, void *data,
2345 struct drm_file *file_priv)
2347 struct drm_mode_get_plane *plane_resp = data;
2348 struct drm_plane *plane;
2349 uint32_t __user *format_ptr;
2351 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2354 plane = drm_plane_find(dev, plane_resp->plane_id);
2358 drm_modeset_lock(&plane->mutex, NULL);
2360 plane_resp->crtc_id = plane->crtc->base.id;
2362 plane_resp->crtc_id = 0;
2365 plane_resp->fb_id = plane->fb->base.id;
2367 plane_resp->fb_id = 0;
2368 drm_modeset_unlock(&plane->mutex);
2370 plane_resp->plane_id = plane->base.id;
2371 plane_resp->possible_crtcs = plane->possible_crtcs;
2372 plane_resp->gamma_size = 0;
2375 * This ioctl is called twice, once to determine how much space is
2376 * needed, and the 2nd time to fill it.
2378 if (plane->format_count &&
2379 (plane_resp->count_format_types >= plane->format_count)) {
2380 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
2381 if (copy_to_user(format_ptr,
2382 plane->format_types,
2383 sizeof(uint32_t) * plane->format_count)) {
2387 plane_resp->count_format_types = plane->format_count;
2393 * drm_plane_check_pixel_format - Check if the plane supports the pixel format
2394 * @plane: plane to check for format support
2395 * @format: the pixel format
2398 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL
2401 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format)
2405 for (i = 0; i < plane->format_count; i++) {
2406 if (format == plane->format_types[i])
2413 static int check_src_coords(uint32_t src_x, uint32_t src_y,
2414 uint32_t src_w, uint32_t src_h,
2415 const struct drm_framebuffer *fb)
2417 unsigned int fb_width, fb_height;
2419 fb_width = fb->width << 16;
2420 fb_height = fb->height << 16;
2422 /* Make sure source coordinates are inside the fb. */
2423 if (src_w > fb_width ||
2424 src_x > fb_width - src_w ||
2425 src_h > fb_height ||
2426 src_y > fb_height - src_h) {
2427 DRM_DEBUG_KMS("Invalid source coordinates "
2428 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
2429 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10,
2430 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10,
2431 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10,
2432 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10);
2440 * setplane_internal - setplane handler for internal callers
2442 * Note that we assume an extra reference has already been taken on fb. If the
2443 * update fails, this reference will be dropped before return; if it succeeds,
2444 * the previous framebuffer (if any) will be unreferenced instead.
2446 * src_{x,y,w,h} are provided in 16.16 fixed point format
2448 static int __setplane_internal(struct drm_plane *plane,
2449 struct drm_crtc *crtc,
2450 struct drm_framebuffer *fb,
2451 int32_t crtc_x, int32_t crtc_y,
2452 uint32_t crtc_w, uint32_t crtc_h,
2453 /* src_{x,y,w,h} values are 16.16 fixed point */
2454 uint32_t src_x, uint32_t src_y,
2455 uint32_t src_w, uint32_t src_h)
2459 /* No fb means shut it down */
2461 plane->old_fb = plane->fb;
2462 ret = plane->funcs->disable_plane(plane);
2467 plane->old_fb = NULL;
2472 /* Check whether this plane is usable on this CRTC */
2473 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
2474 DRM_DEBUG_KMS("Invalid crtc for plane\n");
2479 /* Check whether this plane supports the fb pixel format. */
2480 ret = drm_plane_check_pixel_format(plane, fb->pixel_format);
2482 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2483 drm_get_format_name(fb->pixel_format));
2487 /* Give drivers some help against integer overflows */
2488 if (crtc_w > INT_MAX ||
2489 crtc_x > INT_MAX - (int32_t) crtc_w ||
2491 crtc_y > INT_MAX - (int32_t) crtc_h) {
2492 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
2493 crtc_w, crtc_h, crtc_x, crtc_y);
2498 ret = check_src_coords(src_x, src_y, src_w, src_h, fb);
2502 plane->old_fb = plane->fb;
2503 ret = plane->funcs->update_plane(plane, crtc, fb,
2504 crtc_x, crtc_y, crtc_w, crtc_h,
2505 src_x, src_y, src_w, src_h);
2511 plane->old_fb = NULL;
2516 drm_framebuffer_unreference(fb);
2518 drm_framebuffer_unreference(plane->old_fb);
2519 plane->old_fb = NULL;
2524 static int setplane_internal(struct drm_plane *plane,
2525 struct drm_crtc *crtc,
2526 struct drm_framebuffer *fb,
2527 int32_t crtc_x, int32_t crtc_y,
2528 uint32_t crtc_w, uint32_t crtc_h,
2529 /* src_{x,y,w,h} values are 16.16 fixed point */
2530 uint32_t src_x, uint32_t src_y,
2531 uint32_t src_w, uint32_t src_h)
2535 drm_modeset_lock_all(plane->dev);
2536 ret = __setplane_internal(plane, crtc, fb,
2537 crtc_x, crtc_y, crtc_w, crtc_h,
2538 src_x, src_y, src_w, src_h);
2539 drm_modeset_unlock_all(plane->dev);
2545 * drm_mode_setplane - configure a plane's configuration
2547 * @data: ioctl data*
2548 * @file_priv: DRM file info
2550 * Set plane configuration, including placement, fb, scaling, and other factors.
2551 * Or pass a NULL fb to disable (planes may be disabled without providing a
2555 * Zero on success, negative errno on failure.
2557 int drm_mode_setplane(struct drm_device *dev, void *data,
2558 struct drm_file *file_priv)
2560 struct drm_mode_set_plane *plane_req = data;
2561 struct drm_plane *plane;
2562 struct drm_crtc *crtc = NULL;
2563 struct drm_framebuffer *fb = NULL;
2565 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2569 * First, find the plane, crtc, and fb objects. If not available,
2570 * we don't bother to call the driver.
2572 plane = drm_plane_find(dev, plane_req->plane_id);
2574 DRM_DEBUG_KMS("Unknown plane ID %d\n",
2575 plane_req->plane_id);
2579 if (plane_req->fb_id) {
2580 fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
2582 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
2587 crtc = drm_crtc_find(dev, plane_req->crtc_id);
2589 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
2590 plane_req->crtc_id);
2596 * setplane_internal will take care of deref'ing either the old or new
2597 * framebuffer depending on success.
2599 return setplane_internal(plane, crtc, fb,
2600 plane_req->crtc_x, plane_req->crtc_y,
2601 plane_req->crtc_w, plane_req->crtc_h,
2602 plane_req->src_x, plane_req->src_y,
2603 plane_req->src_w, plane_req->src_h);
2607 * drm_mode_set_config_internal - helper to call ->set_config
2608 * @set: modeset config to set
2610 * This is a little helper to wrap internal calls to the ->set_config driver
2611 * interface. The only thing it adds is correct refcounting dance.
2614 * Zero on success, negative errno on failure.
2616 int drm_mode_set_config_internal(struct drm_mode_set *set)
2618 struct drm_crtc *crtc = set->crtc;
2619 struct drm_framebuffer *fb;
2620 struct drm_crtc *tmp;
2624 * NOTE: ->set_config can also disable other crtcs (if we steal all
2625 * connectors from it), hence we need to refcount the fbs across all
2626 * crtcs. Atomic modeset will have saner semantics ...
2628 drm_for_each_crtc(tmp, crtc->dev)
2629 tmp->primary->old_fb = tmp->primary->fb;
2633 ret = crtc->funcs->set_config(set);
2635 crtc->primary->crtc = crtc;
2636 crtc->primary->fb = fb;
2639 drm_for_each_crtc(tmp, crtc->dev) {
2640 if (tmp->primary->fb)
2641 drm_framebuffer_reference(tmp->primary->fb);
2642 if (tmp->primary->old_fb)
2643 drm_framebuffer_unreference(tmp->primary->old_fb);
2644 tmp->primary->old_fb = NULL;
2649 EXPORT_SYMBOL(drm_mode_set_config_internal);
2652 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode
2653 * @mode: mode to query
2654 * @hdisplay: hdisplay value to fill in
2655 * @vdisplay: vdisplay value to fill in
2657 * The vdisplay value will be doubled if the specified mode is a stereo mode of
2658 * the appropriate layout.
2660 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
2661 int *hdisplay, int *vdisplay)
2663 struct drm_display_mode adjusted;
2665 drm_mode_copy(&adjusted, mode);
2666 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
2667 *hdisplay = adjusted.crtc_hdisplay;
2668 *vdisplay = adjusted.crtc_vdisplay;
2670 EXPORT_SYMBOL(drm_crtc_get_hv_timing);
2673 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
2675 * @crtc: CRTC that framebuffer will be displayed on
2678 * @mode: mode that framebuffer will be displayed under
2679 * @fb: framebuffer to check size of
2681 int drm_crtc_check_viewport(const struct drm_crtc *crtc,
2683 const struct drm_display_mode *mode,
2684 const struct drm_framebuffer *fb)
2687 int hdisplay, vdisplay;
2689 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay);
2692 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) |
2693 BIT(DRM_ROTATE_270)))
2694 swap(hdisplay, vdisplay);
2696 return check_src_coords(x << 16, y << 16,
2697 hdisplay << 16, vdisplay << 16, fb);
2699 EXPORT_SYMBOL(drm_crtc_check_viewport);
2702 * drm_mode_setcrtc - set CRTC configuration
2703 * @dev: drm device for the ioctl
2704 * @data: data pointer for the ioctl
2705 * @file_priv: drm file for the ioctl call
2707 * Build a new CRTC configuration based on user request.
2709 * Called by the user via ioctl.
2712 * Zero on success, negative errno on failure.
2714 int drm_mode_setcrtc(struct drm_device *dev, void *data,
2715 struct drm_file *file_priv)
2717 struct drm_mode_config *config = &dev->mode_config;
2718 struct drm_mode_crtc *crtc_req = data;
2719 struct drm_crtc *crtc;
2720 struct drm_connector **connector_set = NULL, *connector;
2721 struct drm_framebuffer *fb = NULL;
2722 struct drm_display_mode *mode = NULL;
2723 struct drm_mode_set set;
2724 uint32_t __user *set_connectors_ptr;
2728 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2732 * Universal plane src offsets are only 16.16, prevent havoc for
2733 * drivers using universal plane code internally.
2735 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
2738 drm_modeset_lock_all(dev);
2739 crtc = drm_crtc_find(dev, crtc_req->crtc_id);
2741 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
2745 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
2747 if (crtc_req->mode_valid) {
2748 /* If we have a mode we need a framebuffer. */
2749 /* If we pass -1, set the mode with the currently bound fb */
2750 if (crtc_req->fb_id == -1) {
2751 if (!crtc->primary->fb) {
2752 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
2756 fb = crtc->primary->fb;
2757 /* Make refcounting symmetric with the lookup path. */
2758 drm_framebuffer_reference(fb);
2760 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
2762 DRM_DEBUG_KMS("Unknown FB ID%d\n",
2769 mode = drm_mode_create(dev);
2775 ret = drm_mode_convert_umode(mode, &crtc_req->mode);
2777 DRM_DEBUG_KMS("Invalid mode\n");
2781 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
2784 * Check whether the primary plane supports the fb pixel format.
2785 * Drivers not implementing the universal planes API use a
2786 * default formats list provided by the DRM core which doesn't
2787 * match real hardware capabilities. Skip the check in that
2790 if (!crtc->primary->format_default) {
2791 ret = drm_plane_check_pixel_format(crtc->primary,
2794 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2795 drm_get_format_name(fb->pixel_format));
2800 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
2807 if (crtc_req->count_connectors == 0 && mode) {
2808 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
2813 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
2814 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
2815 crtc_req->count_connectors);
2820 if (crtc_req->count_connectors > 0) {
2823 /* Avoid unbounded kernel memory allocation */
2824 if (crtc_req->count_connectors > config->num_connector) {
2829 connector_set = kmalloc_array(crtc_req->count_connectors,
2830 sizeof(struct drm_connector *),
2832 if (!connector_set) {
2837 for (i = 0; i < crtc_req->count_connectors; i++) {
2838 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
2839 if (get_user(out_id, &set_connectors_ptr[i])) {
2844 connector = drm_connector_find(dev, out_id);
2846 DRM_DEBUG_KMS("Connector id %d unknown\n",
2851 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
2855 connector_set[i] = connector;
2860 set.x = crtc_req->x;
2861 set.y = crtc_req->y;
2863 set.connectors = connector_set;
2864 set.num_connectors = crtc_req->count_connectors;
2866 ret = drm_mode_set_config_internal(&set);
2870 drm_framebuffer_unreference(fb);
2872 kfree(connector_set);
2873 drm_mode_destroy(dev, mode);
2874 drm_modeset_unlock_all(dev);
2879 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a
2880 * universal plane handler call
2881 * @crtc: crtc to update cursor for
2882 * @req: data pointer for the ioctl
2883 * @file_priv: drm file for the ioctl call
2885 * Legacy cursor ioctl's work directly with driver buffer handles. To
2886 * translate legacy ioctl calls into universal plane handler calls, we need to
2887 * wrap the native buffer handle in a drm_framebuffer.
2889 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB
2890 * buffer with a pitch of 4*width; the universal plane interface should be used
2891 * directly in cases where the hardware can support other buffer settings and
2892 * userspace wants to make use of these capabilities.
2895 * Zero on success, negative errno on failure.
2897 static int drm_mode_cursor_universal(struct drm_crtc *crtc,
2898 struct drm_mode_cursor2 *req,
2899 struct drm_file *file_priv)
2901 struct drm_device *dev = crtc->dev;
2902 struct drm_framebuffer *fb = NULL;
2903 struct drm_mode_fb_cmd2 fbreq = {
2904 .width = req->width,
2905 .height = req->height,
2906 .pixel_format = DRM_FORMAT_ARGB8888,
2907 .pitches = { req->width * 4 },
2908 .handles = { req->handle },
2910 int32_t crtc_x, crtc_y;
2911 uint32_t crtc_w = 0, crtc_h = 0;
2912 uint32_t src_w = 0, src_h = 0;
2915 BUG_ON(!crtc->cursor);
2916 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL);
2919 * Obtain fb we'll be using (either new or existing) and take an extra
2920 * reference to it if fb != null. setplane will take care of dropping
2921 * the reference if the plane update fails.
2923 if (req->flags & DRM_MODE_CURSOR_BO) {
2925 fb = internal_framebuffer_create(dev, &fbreq, file_priv);
2927 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
2934 fb = crtc->cursor->fb;
2936 drm_framebuffer_reference(fb);
2939 if (req->flags & DRM_MODE_CURSOR_MOVE) {
2943 crtc_x = crtc->cursor_x;
2944 crtc_y = crtc->cursor_y;
2949 crtc_h = fb->height;
2950 src_w = fb->width << 16;
2951 src_h = fb->height << 16;
2955 * setplane_internal will take care of deref'ing either the old or new
2956 * framebuffer depending on success.
2958 ret = __setplane_internal(crtc->cursor, crtc, fb,
2959 crtc_x, crtc_y, crtc_w, crtc_h,
2960 0, 0, src_w, src_h);
2962 /* Update successful; save new cursor position, if necessary */
2963 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
2964 crtc->cursor_x = req->x;
2965 crtc->cursor_y = req->y;
2971 static int drm_mode_cursor_common(struct drm_device *dev,
2972 struct drm_mode_cursor2 *req,
2973 struct drm_file *file_priv)
2975 struct drm_crtc *crtc;
2978 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2981 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
2984 crtc = drm_crtc_find(dev, req->crtc_id);
2986 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
2991 * If this crtc has a universal cursor plane, call that plane's update
2992 * handler rather than using legacy cursor handlers.
2994 drm_modeset_lock_crtc(crtc, crtc->cursor);
2996 ret = drm_mode_cursor_universal(crtc, req, file_priv);
3000 if (req->flags & DRM_MODE_CURSOR_BO) {
3001 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
3005 /* Turns off the cursor if handle is 0 */
3006 if (crtc->funcs->cursor_set2)
3007 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
3008 req->width, req->height, req->hot_x, req->hot_y);
3010 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
3011 req->width, req->height);
3014 if (req->flags & DRM_MODE_CURSOR_MOVE) {
3015 if (crtc->funcs->cursor_move) {
3016 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
3023 drm_modeset_unlock_crtc(crtc);
3031 * drm_mode_cursor_ioctl - set CRTC's cursor configuration
3032 * @dev: drm device for the ioctl
3033 * @data: data pointer for the ioctl
3034 * @file_priv: drm file for the ioctl call
3036 * Set the cursor configuration based on user request.
3038 * Called by the user via ioctl.
3041 * Zero on success, negative errno on failure.
3043 int drm_mode_cursor_ioctl(struct drm_device *dev,
3044 void *data, struct drm_file *file_priv)
3046 struct drm_mode_cursor *req = data;
3047 struct drm_mode_cursor2 new_req;
3049 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
3050 new_req.hot_x = new_req.hot_y = 0;
3052 return drm_mode_cursor_common(dev, &new_req, file_priv);
3056 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration
3057 * @dev: drm device for the ioctl
3058 * @data: data pointer for the ioctl
3059 * @file_priv: drm file for the ioctl call
3061 * Set the cursor configuration based on user request. This implements the 2nd
3062 * version of the cursor ioctl, which allows userspace to additionally specify
3063 * the hotspot of the pointer.
3065 * Called by the user via ioctl.
3068 * Zero on success, negative errno on failure.
3070 int drm_mode_cursor2_ioctl(struct drm_device *dev,
3071 void *data, struct drm_file *file_priv)
3073 struct drm_mode_cursor2 *req = data;
3075 return drm_mode_cursor_common(dev, req, file_priv);
3079 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description
3080 * @bpp: bits per pixels
3081 * @depth: bit depth per pixel
3083 * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
3084 * Useful in fbdev emulation code, since that deals in those values.
3086 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
3092 fmt = DRM_FORMAT_C8;
3096 fmt = DRM_FORMAT_XRGB1555;
3098 fmt = DRM_FORMAT_RGB565;
3101 fmt = DRM_FORMAT_RGB888;
3105 fmt = DRM_FORMAT_XRGB8888;
3106 else if (depth == 30)
3107 fmt = DRM_FORMAT_XRGB2101010;
3109 fmt = DRM_FORMAT_ARGB8888;
3112 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
3113 fmt = DRM_FORMAT_XRGB8888;
3119 EXPORT_SYMBOL(drm_mode_legacy_fb_format);
3122 * drm_mode_addfb - add an FB to the graphics configuration
3123 * @dev: drm device for the ioctl
3124 * @data: data pointer for the ioctl
3125 * @file_priv: drm file for the ioctl call
3127 * Add a new FB to the specified CRTC, given a user request. This is the
3128 * original addfb ioctl which only supported RGB formats.
3130 * Called by the user via ioctl.
3133 * Zero on success, negative errno on failure.
3135 int drm_mode_addfb(struct drm_device *dev,
3136 void *data, struct drm_file *file_priv)
3138 struct drm_mode_fb_cmd *or = data;
3139 struct drm_mode_fb_cmd2 r = {};
3142 /* convert to new format and call new ioctl */
3143 r.fb_id = or->fb_id;
3144 r.width = or->width;
3145 r.height = or->height;
3146 r.pitches[0] = or->pitch;
3147 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
3148 r.handles[0] = or->handle;
3150 ret = drm_mode_addfb2(dev, &r, file_priv);
3154 or->fb_id = r.fb_id;
3159 static int format_check(const struct drm_mode_fb_cmd2 *r)
3161 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
3165 case DRM_FORMAT_RGB332:
3166 case DRM_FORMAT_BGR233:
3167 case DRM_FORMAT_XRGB4444:
3168 case DRM_FORMAT_XBGR4444:
3169 case DRM_FORMAT_RGBX4444:
3170 case DRM_FORMAT_BGRX4444:
3171 case DRM_FORMAT_ARGB4444:
3172 case DRM_FORMAT_ABGR4444:
3173 case DRM_FORMAT_RGBA4444:
3174 case DRM_FORMAT_BGRA4444:
3175 case DRM_FORMAT_XRGB1555:
3176 case DRM_FORMAT_XBGR1555:
3177 case DRM_FORMAT_RGBX5551:
3178 case DRM_FORMAT_BGRX5551:
3179 case DRM_FORMAT_ARGB1555:
3180 case DRM_FORMAT_ABGR1555:
3181 case DRM_FORMAT_RGBA5551:
3182 case DRM_FORMAT_BGRA5551:
3183 case DRM_FORMAT_RGB565:
3184 case DRM_FORMAT_BGR565:
3185 case DRM_FORMAT_RGB888:
3186 case DRM_FORMAT_BGR888:
3187 case DRM_FORMAT_XRGB8888:
3188 case DRM_FORMAT_XBGR8888:
3189 case DRM_FORMAT_RGBX8888:
3190 case DRM_FORMAT_BGRX8888:
3191 case DRM_FORMAT_ARGB8888:
3192 case DRM_FORMAT_ABGR8888:
3193 case DRM_FORMAT_RGBA8888:
3194 case DRM_FORMAT_BGRA8888:
3195 case DRM_FORMAT_XRGB2101010:
3196 case DRM_FORMAT_XBGR2101010:
3197 case DRM_FORMAT_RGBX1010102:
3198 case DRM_FORMAT_BGRX1010102:
3199 case DRM_FORMAT_ARGB2101010:
3200 case DRM_FORMAT_ABGR2101010:
3201 case DRM_FORMAT_RGBA1010102:
3202 case DRM_FORMAT_BGRA1010102:
3203 case DRM_FORMAT_YUYV:
3204 case DRM_FORMAT_YVYU:
3205 case DRM_FORMAT_UYVY:
3206 case DRM_FORMAT_VYUY:
3207 case DRM_FORMAT_AYUV:
3208 case DRM_FORMAT_NV12:
3209 case DRM_FORMAT_NV21:
3210 case DRM_FORMAT_NV16:
3211 case DRM_FORMAT_NV61:
3212 case DRM_FORMAT_NV24:
3213 case DRM_FORMAT_NV42:
3214 case DRM_FORMAT_YUV410:
3215 case DRM_FORMAT_YVU410:
3216 case DRM_FORMAT_YUV411:
3217 case DRM_FORMAT_YVU411:
3218 case DRM_FORMAT_YUV420:
3219 case DRM_FORMAT_YVU420:
3220 case DRM_FORMAT_YUV422:
3221 case DRM_FORMAT_YVU422:
3222 case DRM_FORMAT_YUV444:
3223 case DRM_FORMAT_YVU444:
3226 DRM_DEBUG_KMS("invalid pixel format %s\n",
3227 drm_get_format_name(r->pixel_format));
3232 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
3234 int ret, hsub, vsub, num_planes, i;
3236 ret = format_check(r);
3238 DRM_DEBUG_KMS("bad framebuffer format %s\n",
3239 drm_get_format_name(r->pixel_format));
3243 hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
3244 vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
3245 num_planes = drm_format_num_planes(r->pixel_format);
3247 if (r->width == 0 || r->width % hsub) {
3248 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width);
3252 if (r->height == 0 || r->height % vsub) {
3253 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
3257 for (i = 0; i < num_planes; i++) {
3258 unsigned int width = r->width / (i != 0 ? hsub : 1);
3259 unsigned int height = r->height / (i != 0 ? vsub : 1);
3260 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
3262 if (!r->handles[i]) {
3263 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
3267 if ((uint64_t) width * cpp > UINT_MAX)
3270 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
3273 if (r->pitches[i] < width * cpp) {
3274 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
3278 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {
3279 DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n",
3284 /* modifier specific checks: */
3285 switch (r->modifier[i]) {
3286 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
3287 /* NOTE: the pitch restriction may be lifted later if it turns
3288 * out that no hw has this restriction:
3290 if (r->pixel_format != DRM_FORMAT_NV12 ||
3291 width % 128 || height % 32 ||
3292 r->pitches[i] % 128) {
3293 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i);
3303 for (i = num_planes; i < 4; i++) {
3304 if (r->modifier[i]) {
3305 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i);
3309 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */
3310 if (!(r->flags & DRM_MODE_FB_MODIFIERS))
3313 if (r->handles[i]) {
3314 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i);
3318 if (r->pitches[i]) {
3319 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i);
3323 if (r->offsets[i]) {
3324 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i);
3332 static struct drm_framebuffer *
3333 internal_framebuffer_create(struct drm_device *dev,
3334 const struct drm_mode_fb_cmd2 *r,
3335 struct drm_file *file_priv)
3337 struct drm_mode_config *config = &dev->mode_config;
3338 struct drm_framebuffer *fb;
3341 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) {
3342 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
3343 return ERR_PTR(-EINVAL);
3346 if ((config->min_width > r->width) || (r->width > config->max_width)) {
3347 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
3348 r->width, config->min_width, config->max_width);
3349 return ERR_PTR(-EINVAL);
3351 if ((config->min_height > r->height) || (r->height > config->max_height)) {
3352 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
3353 r->height, config->min_height, config->max_height);
3354 return ERR_PTR(-EINVAL);
3357 if (r->flags & DRM_MODE_FB_MODIFIERS &&
3358 !dev->mode_config.allow_fb_modifiers) {
3359 DRM_DEBUG_KMS("driver does not support fb modifiers\n");
3360 return ERR_PTR(-EINVAL);
3363 ret = framebuffer_check(r);
3365 return ERR_PTR(ret);
3367 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
3369 DRM_DEBUG_KMS("could not create framebuffer\n");
3377 * drm_mode_addfb2 - add an FB to the graphics configuration
3378 * @dev: drm device for the ioctl
3379 * @data: data pointer for the ioctl
3380 * @file_priv: drm file for the ioctl call
3382 * Add a new FB to the specified CRTC, given a user request with format. This is
3383 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
3384 * and uses fourcc codes as pixel format specifiers.
3386 * Called by the user via ioctl.
3389 * Zero on success, negative errno on failure.
3391 int drm_mode_addfb2(struct drm_device *dev,
3392 void *data, struct drm_file *file_priv)
3394 struct drm_mode_fb_cmd2 *r = data;
3395 struct drm_framebuffer *fb;
3397 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3400 fb = internal_framebuffer_create(dev, r, file_priv);
3404 /* Transfer ownership to the filp for reaping on close */
3406 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
3407 mutex_lock(&file_priv->fbs_lock);
3408 r->fb_id = fb->base.id;
3409 list_add(&fb->filp_head, &file_priv->fbs);
3410 mutex_unlock(&file_priv->fbs_lock);
3416 * drm_mode_rmfb - remove an FB from the configuration
3417 * @dev: drm device for the ioctl
3418 * @data: data pointer for the ioctl
3419 * @file_priv: drm file for the ioctl call
3421 * Remove the FB specified by the user.
3423 * Called by the user via ioctl.
3426 * Zero on success, negative errno on failure.
3428 int drm_mode_rmfb(struct drm_device *dev,
3429 void *data, struct drm_file *file_priv)
3431 struct drm_framebuffer *fb = NULL;
3432 struct drm_framebuffer *fbl = NULL;
3433 uint32_t *id = data;
3436 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3439 mutex_lock(&file_priv->fbs_lock);
3440 mutex_lock(&dev->mode_config.fb_lock);
3441 fb = __drm_framebuffer_lookup(dev, *id);
3445 list_for_each_entry(fbl, &file_priv->fbs, filp_head)
3451 list_del_init(&fb->filp_head);
3452 mutex_unlock(&dev->mode_config.fb_lock);
3453 mutex_unlock(&file_priv->fbs_lock);
3455 drm_framebuffer_unreference(fb);
3460 mutex_unlock(&dev->mode_config.fb_lock);
3461 mutex_unlock(&file_priv->fbs_lock);
3467 * drm_mode_getfb - get FB info
3468 * @dev: drm device for the ioctl
3469 * @data: data pointer for the ioctl
3470 * @file_priv: drm file for the ioctl call
3472 * Lookup the FB given its ID and return info about it.
3474 * Called by the user via ioctl.
3477 * Zero on success, negative errno on failure.
3479 int drm_mode_getfb(struct drm_device *dev,
3480 void *data, struct drm_file *file_priv)
3482 struct drm_mode_fb_cmd *r = data;
3483 struct drm_framebuffer *fb;
3486 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3489 fb = drm_framebuffer_lookup(dev, r->fb_id);
3493 r->height = fb->height;
3494 r->width = fb->width;
3495 r->depth = fb->depth;
3496 r->bpp = fb->bits_per_pixel;
3497 r->pitch = fb->pitches[0];
3498 if (fb->funcs->create_handle) {
3499 if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
3500 drm_is_control_client(file_priv)) {
3501 ret = fb->funcs->create_handle(fb, file_priv,
3504 /* GET_FB() is an unprivileged ioctl so we must not
3505 * return a buffer-handle to non-master processes! For
3506 * backwards-compatibility reasons, we cannot make
3507 * GET_FB() privileged, so just return an invalid handle
3508 * for non-masters. */
3516 drm_framebuffer_unreference(fb);
3522 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
3523 * @dev: drm device for the ioctl
3524 * @data: data pointer for the ioctl
3525 * @file_priv: drm file for the ioctl call
3527 * Lookup the FB and flush out the damaged area supplied by userspace as a clip
3528 * rectangle list. Generic userspace which does frontbuffer rendering must call
3529 * this ioctl to flush out the changes on manual-update display outputs, e.g.
3530 * usb display-link, mipi manual update panels or edp panel self refresh modes.
3532 * Modesetting drivers which always update the frontbuffer do not need to
3533 * implement the corresponding ->dirty framebuffer callback.
3535 * Called by the user via ioctl.
3538 * Zero on success, negative errno on failure.
3540 int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
3541 void *data, struct drm_file *file_priv)
3543 struct drm_clip_rect __user *clips_ptr;
3544 struct drm_clip_rect *clips = NULL;
3545 struct drm_mode_fb_dirty_cmd *r = data;
3546 struct drm_framebuffer *fb;
3551 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3554 fb = drm_framebuffer_lookup(dev, r->fb_id);
3558 num_clips = r->num_clips;
3559 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
3561 if (!num_clips != !clips_ptr) {
3566 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
3568 /* If userspace annotates copy, clips must come in pairs */
3569 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
3574 if (num_clips && clips_ptr) {
3575 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
3579 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
3585 ret = copy_from_user(clips, clips_ptr,
3586 num_clips * sizeof(*clips));
3593 if (fb->funcs->dirty) {
3594 ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
3603 drm_framebuffer_unreference(fb);
3610 * drm_fb_release - remove and free the FBs on this file
3611 * @priv: drm file for the ioctl
3613 * Destroy all the FBs associated with @filp.
3615 * Called by the user via ioctl.
3618 * Zero on success, negative errno on failure.
3620 void drm_fb_release(struct drm_file *priv)
3622 struct drm_framebuffer *fb, *tfb;
3625 * When the file gets released that means no one else can access the fb
3626 * list any more, so no need to grab fpriv->fbs_lock. And we need to
3627 * avoid upsetting lockdep since the universal cursor code adds a
3628 * framebuffer while holding mutex locks.
3630 * Note that a real deadlock between fpriv->fbs_lock and the modeset
3631 * locks is impossible here since no one else but this function can get
3634 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
3635 list_del_init(&fb->filp_head);
3637 /* This drops the fpriv->fbs reference. */
3638 drm_framebuffer_unreference(fb);
3643 * drm_property_create - create a new property type
3645 * @flags: flags specifying the property type
3646 * @name: name of the property
3647 * @num_values: number of pre-defined values
3649 * This creates a new generic drm property which can then be attached to a drm
3650 * object with drm_object_attach_property. The returned property object must be
3651 * freed with drm_property_destroy.
3653 * Note that the DRM core keeps a per-device list of properties and that, if
3654 * drm_mode_config_cleanup() is called, it will destroy all properties created
3658 * A pointer to the newly created property on success, NULL on failure.
3660 struct drm_property *drm_property_create(struct drm_device *dev, int flags,
3661 const char *name, int num_values)
3663 struct drm_property *property = NULL;
3666 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
3670 property->dev = dev;
3673 property->values = kcalloc(num_values, sizeof(uint64_t),
3675 if (!property->values)
3679 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
3683 property->flags = flags;
3684 property->num_values = num_values;
3685 INIT_LIST_HEAD(&property->enum_list);
3688 strncpy(property->name, name, DRM_PROP_NAME_LEN);
3689 property->name[DRM_PROP_NAME_LEN-1] = '\0';
3692 list_add_tail(&property->head, &dev->mode_config.property_list);
3694 WARN_ON(!drm_property_type_valid(property));
3698 kfree(property->values);
3702 EXPORT_SYMBOL(drm_property_create);
3705 * drm_property_create_enum - create a new enumeration property type
3707 * @flags: flags specifying the property type
3708 * @name: name of the property
3709 * @props: enumeration lists with property values
3710 * @num_values: number of pre-defined values
3712 * This creates a new generic drm property which can then be attached to a drm
3713 * object with drm_object_attach_property. The returned property object must be
3714 * freed with drm_property_destroy.
3716 * Userspace is only allowed to set one of the predefined values for enumeration
3720 * A pointer to the newly created property on success, NULL on failure.
3722 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
3724 const struct drm_prop_enum_list *props,
3727 struct drm_property *property;
3730 flags |= DRM_MODE_PROP_ENUM;
3732 property = drm_property_create(dev, flags, name, num_values);
3736 for (i = 0; i < num_values; i++) {
3737 ret = drm_property_add_enum(property, i,
3741 drm_property_destroy(dev, property);
3748 EXPORT_SYMBOL(drm_property_create_enum);
3751 * drm_property_create_bitmask - create a new bitmask property type
3753 * @flags: flags specifying the property type
3754 * @name: name of the property
3755 * @props: enumeration lists with property bitflags
3756 * @num_props: size of the @props array
3757 * @supported_bits: bitmask of all supported enumeration values
3759 * This creates a new bitmask drm property which can then be attached to a drm
3760 * object with drm_object_attach_property. The returned property object must be
3761 * freed with drm_property_destroy.
3763 * Compared to plain enumeration properties userspace is allowed to set any
3764 * or'ed together combination of the predefined property bitflag values
3767 * A pointer to the newly created property on success, NULL on failure.
3769 struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
3770 int flags, const char *name,
3771 const struct drm_prop_enum_list *props,
3773 uint64_t supported_bits)
3775 struct drm_property *property;
3776 int i, ret, index = 0;
3777 int num_values = hweight64(supported_bits);
3779 flags |= DRM_MODE_PROP_BITMASK;
3781 property = drm_property_create(dev, flags, name, num_values);
3784 for (i = 0; i < num_props; i++) {
3785 if (!(supported_bits & (1ULL << props[i].type)))
3788 if (WARN_ON(index >= num_values)) {
3789 drm_property_destroy(dev, property);
3793 ret = drm_property_add_enum(property, index++,
3797 drm_property_destroy(dev, property);
3804 EXPORT_SYMBOL(drm_property_create_bitmask);
3806 static struct drm_property *property_create_range(struct drm_device *dev,
3807 int flags, const char *name,
3808 uint64_t min, uint64_t max)
3810 struct drm_property *property;
3812 property = drm_property_create(dev, flags, name, 2);
3816 property->values[0] = min;
3817 property->values[1] = max;
3823 * drm_property_create_range - create a new unsigned ranged property type
3825 * @flags: flags specifying the property type
3826 * @name: name of the property
3827 * @min: minimum value of the property
3828 * @max: maximum value of the property
3830 * This creates a new generic drm property which can then be attached to a drm
3831 * object with drm_object_attach_property. The returned property object must be
3832 * freed with drm_property_destroy.
3834 * Userspace is allowed to set any unsigned integer value in the (min, max)
3838 * A pointer to the newly created property on success, NULL on failure.
3840 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
3842 uint64_t min, uint64_t max)
3844 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags,
3847 EXPORT_SYMBOL(drm_property_create_range);
3850 * drm_property_create_signed_range - create a new signed ranged property type
3852 * @flags: flags specifying the property type
3853 * @name: name of the property
3854 * @min: minimum value of the property
3855 * @max: maximum value of the property
3857 * This creates a new generic drm property which can then be attached to a drm
3858 * object with drm_object_attach_property. The returned property object must be
3859 * freed with drm_property_destroy.
3861 * Userspace is allowed to set any signed integer value in the (min, max)
3865 * A pointer to the newly created property on success, NULL on failure.
3867 struct drm_property *drm_property_create_signed_range(struct drm_device *dev,
3868 int flags, const char *name,
3869 int64_t min, int64_t max)
3871 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags,
3872 name, I642U64(min), I642U64(max));
3874 EXPORT_SYMBOL(drm_property_create_signed_range);
3877 * drm_property_create_object - create a new object property type
3879 * @flags: flags specifying the property type
3880 * @name: name of the property
3881 * @type: object type from DRM_MODE_OBJECT_* defines
3883 * This creates a new generic drm property which can then be attached to a drm
3884 * object with drm_object_attach_property. The returned property object must be
3885 * freed with drm_property_destroy.
3887 * Userspace is only allowed to set this to any property value of the given
3888 * @type. Only useful for atomic properties, which is enforced.
3891 * A pointer to the newly created property on success, NULL on failure.
3893 struct drm_property *drm_property_create_object(struct drm_device *dev,
3894 int flags, const char *name, uint32_t type)
3896 struct drm_property *property;
3898 flags |= DRM_MODE_PROP_OBJECT;
3900 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC)))
3903 property = drm_property_create(dev, flags, name, 1);
3907 property->values[0] = type;
3911 EXPORT_SYMBOL(drm_property_create_object);
3914 * drm_property_create_bool - create a new boolean property type
3916 * @flags: flags specifying the property type
3917 * @name: name of the property
3919 * This creates a new generic drm property which can then be attached to a drm
3920 * object with drm_object_attach_property. The returned property object must be
3921 * freed with drm_property_destroy.
3923 * This is implemented as a ranged property with only {0, 1} as valid values.
3926 * A pointer to the newly created property on success, NULL on failure.
3928 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags,
3931 return drm_property_create_range(dev, flags, name, 0, 1);
3933 EXPORT_SYMBOL(drm_property_create_bool);
3936 * drm_property_add_enum - add a possible value to an enumeration property
3937 * @property: enumeration property to change
3938 * @index: index of the new enumeration
3939 * @value: value of the new enumeration
3940 * @name: symbolic name of the new enumeration
3942 * This functions adds enumerations to a property.
3944 * It's use is deprecated, drivers should use one of the more specific helpers
3945 * to directly create the property with all enumerations already attached.
3948 * Zero on success, error code on failure.
3950 int drm_property_add_enum(struct drm_property *property, int index,
3951 uint64_t value, const char *name)
3953 struct drm_property_enum *prop_enum;
3955 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
3956 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)))
3960 * Bitmask enum properties have the additional constraint of values
3963 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) &&
3967 if (!list_empty(&property->enum_list)) {
3968 list_for_each_entry(prop_enum, &property->enum_list, head) {
3969 if (prop_enum->value == value) {
3970 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3971 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3977 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
3981 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3982 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3983 prop_enum->value = value;
3985 property->values[index] = value;
3986 list_add_tail(&prop_enum->head, &property->enum_list);
3989 EXPORT_SYMBOL(drm_property_add_enum);
3992 * drm_property_destroy - destroy a drm property
3994 * @property: property to destry
3996 * This function frees a property including any attached resources like
3997 * enumeration values.
3999 void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
4001 struct drm_property_enum *prop_enum, *pt;
4003 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) {
4004 list_del(&prop_enum->head);
4008 if (property->num_values)
4009 kfree(property->values);
4010 drm_mode_object_put(dev, &property->base);
4011 list_del(&property->head);
4014 EXPORT_SYMBOL(drm_property_destroy);
4017 * drm_object_attach_property - attach a property to a modeset object
4018 * @obj: drm modeset object
4019 * @property: property to attach
4020 * @init_val: initial value of the property
4022 * This attaches the given property to the modeset object with the given initial
4023 * value. Currently this function cannot fail since the properties are stored in
4024 * a statically sized array.
4026 void drm_object_attach_property(struct drm_mode_object *obj,
4027 struct drm_property *property,
4030 int count = obj->properties->count;
4032 if (count == DRM_OBJECT_MAX_PROPERTY) {
4033 WARN(1, "Failed to attach object property (type: 0x%x). Please "
4034 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
4035 "you see this message on the same object type.\n",
4040 obj->properties->properties[count] = property;
4041 obj->properties->values[count] = init_val;
4042 obj->properties->count++;
4043 if (property->flags & DRM_MODE_PROP_ATOMIC)
4044 obj->properties->atomic_count++;
4046 EXPORT_SYMBOL(drm_object_attach_property);
4049 * drm_object_property_set_value - set the value of a property
4050 * @obj: drm mode object to set property value for
4051 * @property: property to set
4052 * @val: value the property should be set to
4054 * This functions sets a given property on a given object. This function only
4055 * changes the software state of the property, it does not call into the
4056 * driver's ->set_property callback.
4059 * Zero on success, error code on failure.
4061 int drm_object_property_set_value(struct drm_mode_object *obj,
4062 struct drm_property *property, uint64_t val)
4066 for (i = 0; i < obj->properties->count; i++) {
4067 if (obj->properties->properties[i] == property) {
4068 obj->properties->values[i] = val;
4075 EXPORT_SYMBOL(drm_object_property_set_value);
4078 * drm_object_property_get_value - retrieve the value of a property
4079 * @obj: drm mode object to get property value from
4080 * @property: property to retrieve
4081 * @val: storage for the property value
4083 * This function retrieves the softare state of the given property for the given
4084 * property. Since there is no driver callback to retrieve the current property
4085 * value this might be out of sync with the hardware, depending upon the driver
4089 * Zero on success, error code on failure.
4091 int drm_object_property_get_value(struct drm_mode_object *obj,
4092 struct drm_property *property, uint64_t *val)
4096 /* read-only properties bypass atomic mechanism and still store
4097 * their value in obj->properties->values[].. mostly to avoid
4098 * having to deal w/ EDID and similar props in atomic paths:
4100 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) &&
4101 !(property->flags & DRM_MODE_PROP_IMMUTABLE))
4102 return drm_atomic_get_property(obj, property, val);
4104 for (i = 0; i < obj->properties->count; i++) {
4105 if (obj->properties->properties[i] == property) {
4106 *val = obj->properties->values[i];
4113 EXPORT_SYMBOL(drm_object_property_get_value);
4116 * drm_mode_getproperty_ioctl - get the property metadata
4119 * @file_priv: DRM file info
4121 * This function retrieves the metadata for a given property, like the different
4122 * possible values for an enum property or the limits for a range property.
4124 * Blob properties are special
4126 * Called by the user via ioctl.
4129 * Zero on success, negative errno on failure.
4131 int drm_mode_getproperty_ioctl(struct drm_device *dev,
4132 void *data, struct drm_file *file_priv)
4134 struct drm_mode_get_property *out_resp = data;
4135 struct drm_property *property;
4137 int value_count = 0;
4140 struct drm_property_enum *prop_enum;
4141 struct drm_mode_property_enum __user *enum_ptr;
4142 uint64_t __user *values_ptr;
4144 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4147 drm_modeset_lock_all(dev);
4148 property = drm_property_find(dev, out_resp->prop_id);
4154 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
4155 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
4156 list_for_each_entry(prop_enum, &property->enum_list, head)
4160 value_count = property->num_values;
4162 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
4163 out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
4164 out_resp->flags = property->flags;
4166 if ((out_resp->count_values >= value_count) && value_count) {
4167 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
4168 for (i = 0; i < value_count; i++) {
4169 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
4175 out_resp->count_values = value_count;
4177 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
4178 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
4179 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
4181 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
4182 list_for_each_entry(prop_enum, &property->enum_list, head) {
4184 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
4189 if (copy_to_user(&enum_ptr[copied].name,
4190 &prop_enum->name, DRM_PROP_NAME_LEN)) {
4197 out_resp->count_enum_blobs = enum_count;
4201 * NOTE: The idea seems to have been to use this to read all the blob
4202 * property values. But nothing ever added them to the corresponding
4203 * list, userspace always used the special-purpose get_blob ioctl to
4204 * read the value for a blob property. It also doesn't make a lot of
4205 * sense to return values here when everything else is just metadata for
4206 * the property itself.
4208 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
4209 out_resp->count_enum_blobs = 0;
4211 drm_modeset_unlock_all(dev);
4216 * drm_property_create_blob - Create new blob property
4218 * Creates a new blob property for a specified DRM device, optionally
4221 * @dev: DRM device to create property for
4222 * @length: Length to allocate for blob data
4223 * @data: If specified, copies data into blob
4226 * New blob property with a single reference on success, or an ERR_PTR
4229 struct drm_property_blob *
4230 drm_property_create_blob(struct drm_device *dev, size_t length,
4233 struct drm_property_blob *blob;
4236 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob))
4237 return ERR_PTR(-EINVAL);
4239 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
4241 return ERR_PTR(-ENOMEM);
4243 /* This must be explicitly initialised, so we can safely call list_del
4244 * on it in the removal handler, even if it isn't in a file list. */
4245 INIT_LIST_HEAD(&blob->head_file);
4246 blob->length = length;
4250 memcpy(blob->data, data, length);
4252 mutex_lock(&dev->mode_config.blob_lock);
4254 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
4257 mutex_unlock(&dev->mode_config.blob_lock);
4258 return ERR_PTR(-EINVAL);
4261 kref_init(&blob->refcount);
4263 list_add_tail(&blob->head_global,
4264 &dev->mode_config.property_blob_list);
4266 mutex_unlock(&dev->mode_config.blob_lock);
4270 EXPORT_SYMBOL(drm_property_create_blob);
4273 * drm_property_free_blob - Blob property destructor
4275 * Internal free function for blob properties; must not be used directly.
4279 static void drm_property_free_blob(struct kref *kref)
4281 struct drm_property_blob *blob =
4282 container_of(kref, struct drm_property_blob, refcount);
4284 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock));
4286 list_del(&blob->head_global);
4287 list_del(&blob->head_file);
4288 drm_mode_object_put(blob->dev, &blob->base);
4294 * drm_property_unreference_blob - Unreference a blob property
4296 * Drop a reference on a blob property. May free the object.
4298 * @blob: Pointer to blob property
4300 void drm_property_unreference_blob(struct drm_property_blob *blob)
4302 struct drm_device *dev;
4309 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4311 if (kref_put_mutex(&blob->refcount, drm_property_free_blob,
4312 &dev->mode_config.blob_lock))
4313 mutex_unlock(&dev->mode_config.blob_lock);
4315 might_lock(&dev->mode_config.blob_lock);
4317 EXPORT_SYMBOL(drm_property_unreference_blob);
4320 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held
4322 * Drop a reference on a blob property. May free the object. This must be
4323 * called with blob_lock held.
4325 * @blob: Pointer to blob property
4327 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob)
4332 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4334 kref_put(&blob->refcount, drm_property_free_blob);
4338 * drm_property_destroy_user_blobs - destroy all blobs created by this client
4340 * @file_priv: destroy all blobs owned by this file handle
4342 void drm_property_destroy_user_blobs(struct drm_device *dev,
4343 struct drm_file *file_priv)
4345 struct drm_property_blob *blob, *bt;
4347 mutex_lock(&dev->mode_config.blob_lock);
4349 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) {
4350 list_del_init(&blob->head_file);
4351 drm_property_unreference_blob_locked(blob);
4354 mutex_unlock(&dev->mode_config.blob_lock);
4358 * drm_property_reference_blob - Take a reference on an existing property
4360 * Take a new reference on an existing blob property.
4362 * @blob: Pointer to blob property
4364 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob)
4366 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4367 kref_get(&blob->refcount);
4370 EXPORT_SYMBOL(drm_property_reference_blob);
4373 * Like drm_property_lookup_blob, but does not return an additional reference.
4374 * Must be called with blob_lock held.
4376 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev,
4379 struct drm_mode_object *obj = NULL;
4380 struct drm_property_blob *blob;
4382 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock));
4384 mutex_lock(&dev->mode_config.idr_mutex);
4385 obj = idr_find(&dev->mode_config.crtc_idr, id);
4386 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id))
4389 blob = obj_to_blob(obj);
4390 mutex_unlock(&dev->mode_config.idr_mutex);
4396 * drm_property_lookup_blob - look up a blob property and take a reference
4398 * @id: id of the blob property
4400 * If successful, this takes an additional reference to the blob property.
4401 * callers need to make sure to eventually unreference the returned property
4402 * again, using @drm_property_unreference_blob.
4404 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev,
4407 struct drm_property_blob *blob;
4409 mutex_lock(&dev->mode_config.blob_lock);
4410 blob = __drm_property_lookup_blob(dev, id);
4412 if (!kref_get_unless_zero(&blob->refcount))
4415 mutex_unlock(&dev->mode_config.blob_lock);
4419 EXPORT_SYMBOL(drm_property_lookup_blob);
4422 * drm_property_replace_global_blob - atomically replace existing blob property
4424 * @replace: location of blob property pointer to be replaced
4425 * @length: length of data for new blob, or 0 for no data
4426 * @data: content for new blob, or NULL for no data
4427 * @obj_holds_id: optional object for property holding blob ID
4428 * @prop_holds_id: optional property holding blob ID
4429 * @return 0 on success or error on failure
4431 * This function will atomically replace a global property in the blob list,
4432 * optionally updating a property which holds the ID of that property. It is
4433 * guaranteed to be atomic: no caller will be allowed to see intermediate
4434 * results, and either the entire operation will succeed and clean up the
4435 * previous property, or it will fail and the state will be unchanged.
4437 * If length is 0 or data is NULL, no new blob will be created, and the holding
4438 * property, if specified, will be set to 0.
4440 * Access to the replace pointer is assumed to be protected by the caller, e.g.
4441 * by holding the relevant modesetting object lock for its parent.
4443 * For example, a drm_connector has a 'PATH' property, which contains the ID
4444 * of a blob property with the value of the MST path information. Calling this
4445 * function with replace pointing to the connector's path_blob_ptr, length and
4446 * data set for the new path information, obj_holds_id set to the connector's
4447 * base object, and prop_holds_id set to the path property name, will perform
4448 * a completely atomic update. The access to path_blob_ptr is protected by the
4449 * caller holding a lock on the connector.
4451 static int drm_property_replace_global_blob(struct drm_device *dev,
4452 struct drm_property_blob **replace,
4455 struct drm_mode_object *obj_holds_id,
4456 struct drm_property *prop_holds_id)
4458 struct drm_property_blob *new_blob = NULL;
4459 struct drm_property_blob *old_blob = NULL;
4462 WARN_ON(replace == NULL);
4464 old_blob = *replace;
4466 if (length && data) {
4467 new_blob = drm_property_create_blob(dev, length, data);
4468 if (IS_ERR(new_blob))
4469 return PTR_ERR(new_blob);
4472 /* This does not need to be synchronised with blob_lock, as the
4473 * get_properties ioctl locks all modesetting objects, and
4474 * obj_holds_id must be locked before calling here, so we cannot
4475 * have its value out of sync with the list membership modified
4476 * below under blob_lock. */
4478 ret = drm_object_property_set_value(obj_holds_id,
4481 new_blob->base.id : 0);
4486 drm_property_unreference_blob(old_blob);
4487 *replace = new_blob;
4492 drm_property_unreference_blob(new_blob);
4497 * drm_mode_getblob_ioctl - get the contents of a blob property value
4500 * @file_priv: DRM file info
4502 * This function retrieves the contents of a blob property. The value stored in
4503 * an object's blob property is just a normal modeset object id.
4505 * Called by the user via ioctl.
4508 * Zero on success, negative errno on failure.
4510 int drm_mode_getblob_ioctl(struct drm_device *dev,
4511 void *data, struct drm_file *file_priv)
4513 struct drm_mode_get_blob *out_resp = data;
4514 struct drm_property_blob *blob;
4516 void __user *blob_ptr;
4518 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4521 drm_modeset_lock_all(dev);
4522 mutex_lock(&dev->mode_config.blob_lock);
4523 blob = __drm_property_lookup_blob(dev, out_resp->blob_id);
4529 if (out_resp->length == blob->length) {
4530 blob_ptr = (void __user *)(unsigned long)out_resp->data;
4531 if (copy_to_user(blob_ptr, blob->data, blob->length)) {
4536 out_resp->length = blob->length;
4539 mutex_unlock(&dev->mode_config.blob_lock);
4540 drm_modeset_unlock_all(dev);
4545 * drm_mode_createblob_ioctl - create a new blob property
4548 * @file_priv: DRM file info
4550 * This function creates a new blob property with user-defined values. In order
4551 * to give us sensible validation and checking when creating, rather than at
4552 * every potential use, we also require a type to be provided upfront.
4554 * Called by the user via ioctl.
4557 * Zero on success, negative errno on failure.
4559 int drm_mode_createblob_ioctl(struct drm_device *dev,
4560 void *data, struct drm_file *file_priv)
4562 struct drm_mode_create_blob *out_resp = data;
4563 struct drm_property_blob *blob;
4564 void __user *blob_ptr;
4567 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4570 blob = drm_property_create_blob(dev, out_resp->length, NULL);
4572 return PTR_ERR(blob);
4574 blob_ptr = (void __user *)(unsigned long)out_resp->data;
4575 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) {
4580 /* Dropping the lock between create_blob and our access here is safe
4581 * as only the same file_priv can remove the blob; at this point, it is
4582 * not associated with any file_priv. */
4583 mutex_lock(&dev->mode_config.blob_lock);
4584 out_resp->blob_id = blob->base.id;
4585 list_add_tail(&blob->head_file, &file_priv->blobs);
4586 mutex_unlock(&dev->mode_config.blob_lock);
4591 drm_property_unreference_blob(blob);
4596 * drm_mode_destroyblob_ioctl - destroy a user blob property
4599 * @file_priv: DRM file info
4601 * Destroy an existing user-defined blob property.
4603 * Called by the user via ioctl.
4606 * Zero on success, negative errno on failure.
4608 int drm_mode_destroyblob_ioctl(struct drm_device *dev,
4609 void *data, struct drm_file *file_priv)
4611 struct drm_mode_destroy_blob *out_resp = data;
4612 struct drm_property_blob *blob = NULL, *bt;
4616 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4619 mutex_lock(&dev->mode_config.blob_lock);
4620 blob = __drm_property_lookup_blob(dev, out_resp->blob_id);
4626 /* Ensure the property was actually created by this user. */
4627 list_for_each_entry(bt, &file_priv->blobs, head_file) {
4639 /* We must drop head_file here, because we may not be the last
4640 * reference on the blob. */
4641 list_del_init(&blob->head_file);
4642 drm_property_unreference_blob_locked(blob);
4643 mutex_unlock(&dev->mode_config.blob_lock);
4648 mutex_unlock(&dev->mode_config.blob_lock);
4653 * drm_mode_connector_set_path_property - set tile property on connector
4654 * @connector: connector to set property on.
4655 * @path: path to use for property; must not be NULL.
4657 * This creates a property to expose to userspace to specify a
4658 * connector path. This is mainly used for DisplayPort MST where
4659 * connectors have a topology and we want to allow userspace to give
4660 * them more meaningful names.
4663 * Zero on success, negative errno on failure.
4665 int drm_mode_connector_set_path_property(struct drm_connector *connector,
4668 struct drm_device *dev = connector->dev;
4671 ret = drm_property_replace_global_blob(dev,
4672 &connector->path_blob_ptr,
4676 dev->mode_config.path_property);
4679 EXPORT_SYMBOL(drm_mode_connector_set_path_property);
4682 * drm_mode_connector_set_tile_property - set tile property on connector
4683 * @connector: connector to set property on.
4685 * This looks up the tile information for a connector, and creates a
4686 * property for userspace to parse if it exists. The property is of
4687 * the form of 8 integers using ':' as a separator.
4690 * Zero on success, errno on failure.
4692 int drm_mode_connector_set_tile_property(struct drm_connector *connector)
4694 struct drm_device *dev = connector->dev;
4698 if (!connector->has_tile) {
4699 ret = drm_property_replace_global_blob(dev,
4700 &connector->tile_blob_ptr,
4704 dev->mode_config.tile_property);
4708 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
4709 connector->tile_group->id, connector->tile_is_single_monitor,
4710 connector->num_h_tile, connector->num_v_tile,
4711 connector->tile_h_loc, connector->tile_v_loc,
4712 connector->tile_h_size, connector->tile_v_size);
4714 ret = drm_property_replace_global_blob(dev,
4715 &connector->tile_blob_ptr,
4719 dev->mode_config.tile_property);
4722 EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
4725 * drm_mode_connector_update_edid_property - update the edid property of a connector
4726 * @connector: drm connector
4727 * @edid: new value of the edid property
4729 * This function creates a new blob modeset object and assigns its id to the
4730 * connector's edid property.
4733 * Zero on success, negative errno on failure.
4735 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
4736 const struct edid *edid)
4738 struct drm_device *dev = connector->dev;
4742 /* ignore requests to set edid when overridden */
4743 if (connector->override_edid)
4747 size = EDID_LENGTH * (1 + edid->extensions);
4749 ret = drm_property_replace_global_blob(dev,
4750 &connector->edid_blob_ptr,
4754 dev->mode_config.edid_property);
4757 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
4759 /* Some properties could refer to dynamic refcnt'd objects, or things that
4760 * need special locking to handle lifetime issues (ie. to ensure the prop
4761 * value doesn't become invalid part way through the property update due to
4762 * race). The value returned by reference via 'obj' should be passed back
4763 * to drm_property_change_valid_put() after the property is set (and the
4764 * object to which the property is attached has a chance to take it's own
4767 bool drm_property_change_valid_get(struct drm_property *property,
4768 uint64_t value, struct drm_mode_object **ref)
4772 if (property->flags & DRM_MODE_PROP_IMMUTABLE)
4777 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) {
4778 if (value < property->values[0] || value > property->values[1])
4781 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) {
4782 int64_t svalue = U642I64(value);
4784 if (svalue < U642I64(property->values[0]) ||
4785 svalue > U642I64(property->values[1]))
4788 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
4789 uint64_t valid_mask = 0;
4791 for (i = 0; i < property->num_values; i++)
4792 valid_mask |= (1ULL << property->values[i]);
4793 return !(value & ~valid_mask);
4794 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
4795 struct drm_property_blob *blob;
4800 blob = drm_property_lookup_blob(property->dev, value);
4807 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
4808 /* a zero value for an object property translates to null: */
4812 /* handle refcnt'd objects specially: */
4813 if (property->values[0] == DRM_MODE_OBJECT_FB) {
4814 struct drm_framebuffer *fb;
4815 fb = drm_framebuffer_lookup(property->dev, value);
4823 return _object_find(property->dev, value, property->values[0]) != NULL;
4827 for (i = 0; i < property->num_values; i++)
4828 if (property->values[i] == value)
4833 void drm_property_change_valid_put(struct drm_property *property,
4834 struct drm_mode_object *ref)
4839 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
4840 if (property->values[0] == DRM_MODE_OBJECT_FB)
4841 drm_framebuffer_unreference(obj_to_fb(ref));
4842 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
4843 drm_property_unreference_blob(obj_to_blob(ref));
4847 * drm_mode_connector_property_set_ioctl - set the current value of a connector property
4850 * @file_priv: DRM file info
4852 * This function sets the current value for a connectors's property. It also
4853 * calls into a driver's ->set_property callback to update the hardware state
4855 * Called by the user via ioctl.
4858 * Zero on success, negative errno on failure.
4860 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
4861 void *data, struct drm_file *file_priv)
4863 struct drm_mode_connector_set_property *conn_set_prop = data;
4864 struct drm_mode_obj_set_property obj_set_prop = {
4865 .value = conn_set_prop->value,
4866 .prop_id = conn_set_prop->prop_id,
4867 .obj_id = conn_set_prop->connector_id,
4868 .obj_type = DRM_MODE_OBJECT_CONNECTOR
4871 /* It does all the locking and checking we need */
4872 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
4875 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
4876 struct drm_property *property,
4880 struct drm_connector *connector = obj_to_connector(obj);
4882 /* Do DPMS ourselves */
4883 if (property == connector->dev->mode_config.dpms_property) {
4884 ret = (*connector->funcs->dpms)(connector, (int)value);
4885 } else if (connector->funcs->set_property)
4886 ret = connector->funcs->set_property(connector, property, value);
4888 /* store the property value if successful */
4890 drm_object_property_set_value(&connector->base, property, value);
4894 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
4895 struct drm_property *property,
4899 struct drm_crtc *crtc = obj_to_crtc(obj);
4901 if (crtc->funcs->set_property)
4902 ret = crtc->funcs->set_property(crtc, property, value);
4904 drm_object_property_set_value(obj, property, value);
4910 * drm_mode_plane_set_obj_prop - set the value of a property
4911 * @plane: drm plane object to set property value for
4912 * @property: property to set
4913 * @value: value the property should be set to
4915 * This functions sets a given property on a given plane object. This function
4916 * calls the driver's ->set_property callback and changes the software state of
4917 * the property if the callback succeeds.
4920 * Zero on success, error code on failure.
4922 int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
4923 struct drm_property *property,
4927 struct drm_mode_object *obj = &plane->base;
4929 if (plane->funcs->set_property)
4930 ret = plane->funcs->set_property(plane, property, value);
4932 drm_object_property_set_value(obj, property, value);
4936 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
4939 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property
4942 * @file_priv: DRM file info
4944 * This function retrieves the current value for an object's property. Compared
4945 * to the connector specific ioctl this one is extended to also work on crtc and
4948 * Called by the user via ioctl.
4951 * Zero on success, negative errno on failure.
4953 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
4954 struct drm_file *file_priv)
4956 struct drm_mode_obj_get_properties *arg = data;
4957 struct drm_mode_object *obj;
4960 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4963 drm_modeset_lock_all(dev);
4965 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
4970 if (!obj->properties) {
4975 ret = get_properties(obj, file_priv->atomic,
4976 (uint32_t __user *)(unsigned long)(arg->props_ptr),
4977 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
4981 drm_modeset_unlock_all(dev);
4986 * drm_mode_obj_set_property_ioctl - set the current value of an object's property
4989 * @file_priv: DRM file info
4991 * This function sets the current value for an object's property. It also calls
4992 * into a driver's ->set_property callback to update the hardware state.
4993 * Compared to the connector specific ioctl this one is extended to also work on
4994 * crtc and plane objects.
4996 * Called by the user via ioctl.
4999 * Zero on success, negative errno on failure.
5001 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
5002 struct drm_file *file_priv)
5004 struct drm_mode_obj_set_property *arg = data;
5005 struct drm_mode_object *arg_obj;
5006 struct drm_mode_object *prop_obj;
5007 struct drm_property *property;
5008 int i, ret = -EINVAL;
5009 struct drm_mode_object *ref;
5011 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5014 drm_modeset_lock_all(dev);
5016 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
5021 if (!arg_obj->properties)
5024 for (i = 0; i < arg_obj->properties->count; i++)
5025 if (arg_obj->properties->properties[i]->base.id == arg->prop_id)
5028 if (i == arg_obj->properties->count)
5031 prop_obj = drm_mode_object_find(dev, arg->prop_id,
5032 DRM_MODE_OBJECT_PROPERTY);
5037 property = obj_to_property(prop_obj);
5039 if (!drm_property_change_valid_get(property, arg->value, &ref))
5042 switch (arg_obj->type) {
5043 case DRM_MODE_OBJECT_CONNECTOR:
5044 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
5047 case DRM_MODE_OBJECT_CRTC:
5048 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
5050 case DRM_MODE_OBJECT_PLANE:
5051 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj),
5052 property, arg->value);
5056 drm_property_change_valid_put(property, ref);
5059 drm_modeset_unlock_all(dev);
5064 * drm_mode_connector_attach_encoder - attach a connector to an encoder
5065 * @connector: connector to attach
5066 * @encoder: encoder to attach @connector to
5068 * This function links up a connector to an encoder. Note that the routing
5069 * restrictions between encoders and crtcs are exposed to userspace through the
5070 * possible_clones and possible_crtcs bitmasks.
5073 * Zero on success, negative errno on failure.
5075 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
5076 struct drm_encoder *encoder)
5081 * In the past, drivers have attempted to model the static association
5082 * of connector to encoder in simple connector/encoder devices using a
5083 * direct assignment of connector->encoder = encoder. This connection
5084 * is a logical one and the responsibility of the core, so drivers are
5085 * expected not to mess with this.
5087 * Note that the error return should've been enough here, but a large
5088 * majority of drivers ignores the return value, so add in a big WARN
5089 * to get people's attention.
5091 if (WARN_ON(connector->encoder))
5094 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
5095 if (connector->encoder_ids[i] == 0) {
5096 connector->encoder_ids[i] = encoder->base.id;
5102 EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
5105 * drm_mode_crtc_set_gamma_size - set the gamma table size
5106 * @crtc: CRTC to set the gamma table size for
5107 * @gamma_size: size of the gamma table
5109 * Drivers which support gamma tables should set this to the supported gamma
5110 * table size when initializing the CRTC. Currently the drm core only supports a
5111 * fixed gamma table size.
5114 * Zero on success, negative errno on failure.
5116 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
5119 crtc->gamma_size = gamma_size;
5121 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3,
5123 if (!crtc->gamma_store) {
5124 crtc->gamma_size = 0;
5130 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
5133 * drm_mode_gamma_set_ioctl - set the gamma table
5136 * @file_priv: DRM file info
5138 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can
5139 * inquire the required gamma table size through drm_mode_gamma_get_ioctl.
5141 * Called by the user via ioctl.
5144 * Zero on success, negative errno on failure.
5146 int drm_mode_gamma_set_ioctl(struct drm_device *dev,
5147 void *data, struct drm_file *file_priv)
5149 struct drm_mode_crtc_lut *crtc_lut = data;
5150 struct drm_crtc *crtc;
5151 void *r_base, *g_base, *b_base;
5155 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5158 drm_modeset_lock_all(dev);
5159 crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
5165 if (crtc->funcs->gamma_set == NULL) {
5170 /* memcpy into gamma store */
5171 if (crtc_lut->gamma_size != crtc->gamma_size) {
5176 size = crtc_lut->gamma_size * (sizeof(uint16_t));
5177 r_base = crtc->gamma_store;
5178 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
5183 g_base = r_base + size;
5184 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
5189 b_base = g_base + size;
5190 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
5195 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
5198 drm_modeset_unlock_all(dev);
5204 * drm_mode_gamma_get_ioctl - get the gamma table
5207 * @file_priv: DRM file info
5209 * Copy the current gamma table into the storage provided. This also provides
5210 * the gamma table size the driver expects, which can be used to size the
5211 * allocated storage.
5213 * Called by the user via ioctl.
5216 * Zero on success, negative errno on failure.
5218 int drm_mode_gamma_get_ioctl(struct drm_device *dev,
5219 void *data, struct drm_file *file_priv)
5221 struct drm_mode_crtc_lut *crtc_lut = data;
5222 struct drm_crtc *crtc;
5223 void *r_base, *g_base, *b_base;
5227 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5230 drm_modeset_lock_all(dev);
5231 crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
5237 /* memcpy into gamma store */
5238 if (crtc_lut->gamma_size != crtc->gamma_size) {
5243 size = crtc_lut->gamma_size * (sizeof(uint16_t));
5244 r_base = crtc->gamma_store;
5245 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
5250 g_base = r_base + size;
5251 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
5256 b_base = g_base + size;
5257 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
5262 drm_modeset_unlock_all(dev);
5267 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update
5270 * @file_priv: DRM file info
5272 * This schedules an asynchronous update on a given CRTC, called page flip.
5273 * Optionally a drm event is generated to signal the completion of the event.
5274 * Generic drivers cannot assume that a pageflip with changed framebuffer
5275 * properties (including driver specific metadata like tiling layout) will work,
5276 * but some drivers support e.g. pixel format changes through the pageflip
5279 * Called by the user via ioctl.
5282 * Zero on success, negative errno on failure.
5284 int drm_mode_page_flip_ioctl(struct drm_device *dev,
5285 void *data, struct drm_file *file_priv)
5287 struct drm_mode_crtc_page_flip *page_flip = data;
5288 struct drm_crtc *crtc;
5289 struct drm_framebuffer *fb = NULL;
5290 struct drm_pending_vblank_event *e = NULL;
5293 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
5294 page_flip->reserved != 0)
5297 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
5300 crtc = drm_crtc_find(dev, page_flip->crtc_id);
5304 drm_modeset_lock_crtc(crtc, crtc->primary);
5305 if (crtc->primary->fb == NULL) {
5306 /* The framebuffer is currently unbound, presumably
5307 * due to a hotplug event, that userspace has not
5314 if (crtc->funcs->page_flip == NULL)
5317 fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
5324 const struct drm_plane_state *state = crtc->primary->state;
5326 ret = check_src_coords(state->src_x, state->src_y,
5327 state->src_w, state->src_h, fb);
5329 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb);
5334 if (crtc->primary->fb->pixel_format != fb->pixel_format) {
5335 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
5340 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
5341 e = kzalloc(sizeof *e, GFP_KERNEL);
5346 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
5347 e->event.base.length = sizeof(e->event);
5348 e->event.user_data = page_flip->user_data;
5349 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
5356 crtc->primary->old_fb = crtc->primary->fb;
5357 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags);
5359 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT)
5360 drm_event_cancel_free(dev, &e->base);
5361 /* Keep the old fb, don't unref it. */
5362 crtc->primary->old_fb = NULL;
5364 crtc->primary->fb = fb;
5365 /* Unref only the old framebuffer. */
5371 drm_framebuffer_unreference(fb);
5372 if (crtc->primary->old_fb)
5373 drm_framebuffer_unreference(crtc->primary->old_fb);
5374 crtc->primary->old_fb = NULL;
5375 drm_modeset_unlock_crtc(crtc);
5381 * drm_mode_config_reset - call ->reset callbacks
5384 * This functions calls all the crtc's, encoder's and connector's ->reset
5385 * callback. Drivers can use this in e.g. their driver load or resume code to
5386 * reset hardware and software state.
5388 void drm_mode_config_reset(struct drm_device *dev)
5390 struct drm_crtc *crtc;
5391 struct drm_plane *plane;
5392 struct drm_encoder *encoder;
5393 struct drm_connector *connector;
5395 drm_for_each_plane(plane, dev)
5396 if (plane->funcs->reset)
5397 plane->funcs->reset(plane);
5399 drm_for_each_crtc(crtc, dev)
5400 if (crtc->funcs->reset)
5401 crtc->funcs->reset(crtc);
5403 drm_for_each_encoder(encoder, dev)
5404 if (encoder->funcs->reset)
5405 encoder->funcs->reset(encoder);
5407 mutex_lock(&dev->mode_config.mutex);
5408 drm_for_each_connector(connector, dev)
5409 if (connector->funcs->reset)
5410 connector->funcs->reset(connector);
5411 mutex_unlock(&dev->mode_config.mutex);
5413 EXPORT_SYMBOL(drm_mode_config_reset);
5416 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer
5419 * @file_priv: DRM file info
5421 * This creates a new dumb buffer in the driver's backing storage manager (GEM,
5422 * TTM or something else entirely) and returns the resulting buffer handle. This
5423 * handle can then be wrapped up into a framebuffer modeset object.
5425 * Note that userspace is not allowed to use such objects for render
5426 * acceleration - drivers must create their own private ioctls for such a use
5429 * Called by the user via ioctl.
5432 * Zero on success, negative errno on failure.
5434 int drm_mode_create_dumb_ioctl(struct drm_device *dev,
5435 void *data, struct drm_file *file_priv)
5437 struct drm_mode_create_dumb *args = data;
5438 u32 cpp, stride, size;
5440 if (!dev->driver->dumb_create)
5442 if (!args->width || !args->height || !args->bpp)
5445 /* overflow checks for 32bit size calculations */
5446 /* NOTE: DIV_ROUND_UP() can overflow */
5447 cpp = DIV_ROUND_UP(args->bpp, 8);
5448 if (!cpp || cpp > 0xffffffffU / args->width)
5450 stride = cpp * args->width;
5451 if (args->height > 0xffffffffU / stride)
5454 /* test for wrap-around */
5455 size = args->height * stride;
5456 if (PAGE_ALIGN(size) == 0)
5460 * handle, pitch and size are output parameters. Zero them out to
5461 * prevent drivers from accidentally using uninitialized data. Since
5462 * not all existing userspace is clearing these fields properly we
5463 * cannot reject IOCTL with garbage in them.
5469 return dev->driver->dumb_create(file_priv, dev, args);
5473 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer
5476 * @file_priv: DRM file info
5478 * Allocate an offset in the drm device node's address space to be able to
5479 * memory map a dumb buffer.
5481 * Called by the user via ioctl.
5484 * Zero on success, negative errno on failure.
5486 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
5487 void *data, struct drm_file *file_priv)
5489 struct drm_mode_map_dumb *args = data;
5491 /* call driver ioctl to get mmap offset */
5492 if (!dev->driver->dumb_map_offset)
5495 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
5499 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer
5502 * @file_priv: DRM file info
5504 * This destroys the userspace handle for the given dumb backing storage buffer.
5505 * Since buffer objects must be reference counted in the kernel a buffer object
5506 * won't be immediately freed if a framebuffer modeset object still uses it.
5508 * Called by the user via ioctl.
5511 * Zero on success, negative errno on failure.
5513 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
5514 void *data, struct drm_file *file_priv)
5516 struct drm_mode_destroy_dumb *args = data;
5518 if (!dev->driver->dumb_destroy)
5521 return dev->driver->dumb_destroy(file_priv, dev, args->handle);
5525 * drm_fb_get_bpp_depth - get the bpp/depth values for format
5526 * @format: pixel format (DRM_FORMAT_*)
5527 * @depth: storage for the depth value
5528 * @bpp: storage for the bpp value
5530 * This only supports RGB formats here for compat with code that doesn't use
5531 * pixel formats directly yet.
5533 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
5538 case DRM_FORMAT_RGB332:
5539 case DRM_FORMAT_BGR233:
5543 case DRM_FORMAT_XRGB1555:
5544 case DRM_FORMAT_XBGR1555:
5545 case DRM_FORMAT_RGBX5551:
5546 case DRM_FORMAT_BGRX5551:
5547 case DRM_FORMAT_ARGB1555:
5548 case DRM_FORMAT_ABGR1555:
5549 case DRM_FORMAT_RGBA5551:
5550 case DRM_FORMAT_BGRA5551:
5554 case DRM_FORMAT_RGB565:
5555 case DRM_FORMAT_BGR565:
5559 case DRM_FORMAT_RGB888:
5560 case DRM_FORMAT_BGR888:
5564 case DRM_FORMAT_XRGB8888:
5565 case DRM_FORMAT_XBGR8888:
5566 case DRM_FORMAT_RGBX8888:
5567 case DRM_FORMAT_BGRX8888:
5571 case DRM_FORMAT_XRGB2101010:
5572 case DRM_FORMAT_XBGR2101010:
5573 case DRM_FORMAT_RGBX1010102:
5574 case DRM_FORMAT_BGRX1010102:
5575 case DRM_FORMAT_ARGB2101010:
5576 case DRM_FORMAT_ABGR2101010:
5577 case DRM_FORMAT_RGBA1010102:
5578 case DRM_FORMAT_BGRA1010102:
5582 case DRM_FORMAT_ARGB8888:
5583 case DRM_FORMAT_ABGR8888:
5584 case DRM_FORMAT_RGBA8888:
5585 case DRM_FORMAT_BGRA8888:
5590 DRM_DEBUG_KMS("unsupported pixel format %s\n",
5591 drm_get_format_name(format));
5597 EXPORT_SYMBOL(drm_fb_get_bpp_depth);
5600 * drm_format_num_planes - get the number of planes for format
5601 * @format: pixel format (DRM_FORMAT_*)
5604 * The number of planes used by the specified pixel format.
5606 int drm_format_num_planes(uint32_t format)
5609 case DRM_FORMAT_YUV410:
5610 case DRM_FORMAT_YVU410:
5611 case DRM_FORMAT_YUV411:
5612 case DRM_FORMAT_YVU411:
5613 case DRM_FORMAT_YUV420:
5614 case DRM_FORMAT_YVU420:
5615 case DRM_FORMAT_YUV422:
5616 case DRM_FORMAT_YVU422:
5617 case DRM_FORMAT_YUV444:
5618 case DRM_FORMAT_YVU444:
5620 case DRM_FORMAT_NV12:
5621 case DRM_FORMAT_NV21:
5622 case DRM_FORMAT_NV16:
5623 case DRM_FORMAT_NV61:
5624 case DRM_FORMAT_NV24:
5625 case DRM_FORMAT_NV42:
5631 EXPORT_SYMBOL(drm_format_num_planes);
5634 * drm_format_plane_cpp - determine the bytes per pixel value
5635 * @format: pixel format (DRM_FORMAT_*)
5636 * @plane: plane index
5639 * The bytes per pixel value for the specified plane.
5641 int drm_format_plane_cpp(uint32_t format, int plane)
5646 if (plane >= drm_format_num_planes(format))
5650 case DRM_FORMAT_YUYV:
5651 case DRM_FORMAT_YVYU:
5652 case DRM_FORMAT_UYVY:
5653 case DRM_FORMAT_VYUY:
5655 case DRM_FORMAT_NV12:
5656 case DRM_FORMAT_NV21:
5657 case DRM_FORMAT_NV16:
5658 case DRM_FORMAT_NV61:
5659 case DRM_FORMAT_NV24:
5660 case DRM_FORMAT_NV42:
5661 return plane ? 2 : 1;
5662 case DRM_FORMAT_YUV410:
5663 case DRM_FORMAT_YVU410:
5664 case DRM_FORMAT_YUV411:
5665 case DRM_FORMAT_YVU411:
5666 case DRM_FORMAT_YUV420:
5667 case DRM_FORMAT_YVU420:
5668 case DRM_FORMAT_YUV422:
5669 case DRM_FORMAT_YVU422:
5670 case DRM_FORMAT_YUV444:
5671 case DRM_FORMAT_YVU444:
5674 drm_fb_get_bpp_depth(format, &depth, &bpp);
5678 EXPORT_SYMBOL(drm_format_plane_cpp);
5681 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
5682 * @format: pixel format (DRM_FORMAT_*)
5685 * The horizontal chroma subsampling factor for the
5686 * specified pixel format.
5688 int drm_format_horz_chroma_subsampling(uint32_t format)
5691 case DRM_FORMAT_YUV411:
5692 case DRM_FORMAT_YVU411:
5693 case DRM_FORMAT_YUV410:
5694 case DRM_FORMAT_YVU410:
5696 case DRM_FORMAT_YUYV:
5697 case DRM_FORMAT_YVYU:
5698 case DRM_FORMAT_UYVY:
5699 case DRM_FORMAT_VYUY:
5700 case DRM_FORMAT_NV12:
5701 case DRM_FORMAT_NV21:
5702 case DRM_FORMAT_NV16:
5703 case DRM_FORMAT_NV61:
5704 case DRM_FORMAT_YUV422:
5705 case DRM_FORMAT_YVU422:
5706 case DRM_FORMAT_YUV420:
5707 case DRM_FORMAT_YVU420:
5713 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
5716 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
5717 * @format: pixel format (DRM_FORMAT_*)
5720 * The vertical chroma subsampling factor for the
5721 * specified pixel format.
5723 int drm_format_vert_chroma_subsampling(uint32_t format)
5726 case DRM_FORMAT_YUV410:
5727 case DRM_FORMAT_YVU410:
5729 case DRM_FORMAT_YUV420:
5730 case DRM_FORMAT_YVU420:
5731 case DRM_FORMAT_NV12:
5732 case DRM_FORMAT_NV21:
5738 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
5741 * drm_rotation_simplify() - Try to simplify the rotation
5742 * @rotation: Rotation to be simplified
5743 * @supported_rotations: Supported rotations
5745 * Attempt to simplify the rotation to a form that is supported.
5746 * Eg. if the hardware supports everything except DRM_REFLECT_X
5747 * one could call this function like this:
5749 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) |
5750 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) |
5751 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y));
5753 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of
5754 * transforms the hardware supports, this function may not
5755 * be able to produce a supported transform, so the caller should
5756 * check the result afterwards.
5758 unsigned int drm_rotation_simplify(unsigned int rotation,
5759 unsigned int supported_rotations)
5761 if (rotation & ~supported_rotations) {
5762 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y);
5763 rotation = (rotation & DRM_REFLECT_MASK) |
5764 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4);
5769 EXPORT_SYMBOL(drm_rotation_simplify);
5772 * drm_mode_config_init - initialize DRM mode_configuration structure
5775 * Initialize @dev's mode_config structure, used for tracking the graphics
5776 * configuration of @dev.
5778 * Since this initializes the modeset locks, no locking is possible. Which is no
5779 * problem, since this should happen single threaded at init time. It is the
5780 * driver's problem to ensure this guarantee.
5783 void drm_mode_config_init(struct drm_device *dev)
5785 mutex_init(&dev->mode_config.mutex);
5786 drm_modeset_lock_init(&dev->mode_config.connection_mutex);
5787 mutex_init(&dev->mode_config.idr_mutex);
5788 mutex_init(&dev->mode_config.fb_lock);
5789 mutex_init(&dev->mode_config.blob_lock);
5790 INIT_LIST_HEAD(&dev->mode_config.fb_list);
5791 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
5792 INIT_LIST_HEAD(&dev->mode_config.connector_list);
5793 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
5794 INIT_LIST_HEAD(&dev->mode_config.property_list);
5795 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
5796 INIT_LIST_HEAD(&dev->mode_config.plane_list);
5797 idr_init(&dev->mode_config.crtc_idr);
5798 idr_init(&dev->mode_config.tile_idr);
5800 drm_modeset_lock_all(dev);
5801 drm_mode_create_standard_properties(dev);
5802 drm_modeset_unlock_all(dev);
5804 /* Just to be sure */
5805 dev->mode_config.num_fb = 0;
5806 dev->mode_config.num_connector = 0;
5807 dev->mode_config.num_crtc = 0;
5808 dev->mode_config.num_encoder = 0;
5809 dev->mode_config.num_overlay_plane = 0;
5810 dev->mode_config.num_total_plane = 0;
5812 EXPORT_SYMBOL(drm_mode_config_init);
5815 * drm_mode_config_cleanup - free up DRM mode_config info
5818 * Free up all the connectors and CRTCs associated with this DRM device, then
5819 * free up the framebuffers and associated buffer objects.
5821 * Note that since this /should/ happen single-threaded at driver/device
5822 * teardown time, no locking is required. It's the driver's job to ensure that
5823 * this guarantee actually holds true.
5825 * FIXME: cleanup any dangling user buffer objects too
5827 void drm_mode_config_cleanup(struct drm_device *dev)
5829 struct drm_connector *connector, *ot;
5830 struct drm_crtc *crtc, *ct;
5831 struct drm_encoder *encoder, *enct;
5832 struct drm_framebuffer *fb, *fbt;
5833 struct drm_property *property, *pt;
5834 struct drm_property_blob *blob, *bt;
5835 struct drm_plane *plane, *plt;
5837 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
5839 encoder->funcs->destroy(encoder);
5842 list_for_each_entry_safe(connector, ot,
5843 &dev->mode_config.connector_list, head) {
5844 connector->funcs->destroy(connector);
5847 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
5849 drm_property_destroy(dev, property);
5852 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
5854 drm_property_unreference_blob(blob);
5858 * Single-threaded teardown context, so it's not required to grab the
5859 * fb_lock to protect against concurrent fb_list access. Contrary, it
5860 * would actually deadlock with the drm_framebuffer_cleanup function.
5862 * Also, if there are any framebuffers left, that's a driver leak now,
5863 * so politely WARN about this.
5865 WARN_ON(!list_empty(&dev->mode_config.fb_list));
5866 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
5867 drm_framebuffer_free(&fb->refcount);
5870 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
5872 plane->funcs->destroy(plane);
5875 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
5876 crtc->funcs->destroy(crtc);
5879 idr_destroy(&dev->mode_config.tile_idr);
5880 idr_destroy(&dev->mode_config.crtc_idr);
5881 drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
5883 EXPORT_SYMBOL(drm_mode_config_cleanup);
5885 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
5886 unsigned int supported_rotations)
5888 static const struct drm_prop_enum_list props[] = {
5889 { DRM_ROTATE_0, "rotate-0" },
5890 { DRM_ROTATE_90, "rotate-90" },
5891 { DRM_ROTATE_180, "rotate-180" },
5892 { DRM_ROTATE_270, "rotate-270" },
5893 { DRM_REFLECT_X, "reflect-x" },
5894 { DRM_REFLECT_Y, "reflect-y" },
5897 return drm_property_create_bitmask(dev, 0, "rotation",
5898 props, ARRAY_SIZE(props),
5899 supported_rotations);
5901 EXPORT_SYMBOL(drm_mode_create_rotation_property);
5906 * Tile groups are used to represent tiled monitors with a unique
5907 * integer identifier. Tiled monitors using DisplayID v1.3 have
5908 * a unique 8-byte handle, we store this in a tile group, so we
5909 * have a common identifier for all tiles in a monitor group.
5911 static void drm_tile_group_free(struct kref *kref)
5913 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
5914 struct drm_device *dev = tg->dev;
5915 mutex_lock(&dev->mode_config.idr_mutex);
5916 idr_remove(&dev->mode_config.tile_idr, tg->id);
5917 mutex_unlock(&dev->mode_config.idr_mutex);
5922 * drm_mode_put_tile_group - drop a reference to a tile group.
5924 * @tg: tile group to drop reference to.
5926 * drop reference to tile group and free if 0.
5928 void drm_mode_put_tile_group(struct drm_device *dev,
5929 struct drm_tile_group *tg)
5931 kref_put(&tg->refcount, drm_tile_group_free);
5935 * drm_mode_get_tile_group - get a reference to an existing tile group
5937 * @topology: 8-bytes unique per monitor.
5939 * Use the unique bytes to get a reference to an existing tile group.
5942 * tile group or NULL if not found.
5944 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
5947 struct drm_tile_group *tg;
5949 mutex_lock(&dev->mode_config.idr_mutex);
5950 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
5951 if (!memcmp(tg->group_data, topology, 8)) {
5952 if (!kref_get_unless_zero(&tg->refcount))
5954 mutex_unlock(&dev->mode_config.idr_mutex);
5958 mutex_unlock(&dev->mode_config.idr_mutex);
5961 EXPORT_SYMBOL(drm_mode_get_tile_group);
5964 * drm_mode_create_tile_group - create a tile group from a displayid description
5966 * @topology: 8-bytes unique per monitor.
5968 * Create a tile group for the unique monitor, and get a unique
5969 * identifier for the tile group.
5972 * new tile group or error.
5974 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
5977 struct drm_tile_group *tg;
5980 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
5982 return ERR_PTR(-ENOMEM);
5984 kref_init(&tg->refcount);
5985 memcpy(tg->group_data, topology, 8);
5988 mutex_lock(&dev->mode_config.idr_mutex);
5989 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
5997 mutex_unlock(&dev->mode_config.idr_mutex);
6000 EXPORT_SYMBOL(drm_mode_create_tile_group);