1/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 * Copyright (c) 2008 Red Hat Inc.
5 *
6 * DRM core CRTC related functions
7 *
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.
17 *
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
24 * OF THIS SOFTWARE.
25 *
26 * Authors:
27 * Keith Packard
28 * Eric Anholt <eric@anholt.net>
29 * Dave Airlie <airlied@linux.ie>
30 * Jesse Barnes <jesse.barnes@intel.com>
31 */
32#include <linux/err.h>
33#include <linux/spinlock.h>
34#include <linux/ctype.h>
35#include <linux/list.h>
36#include <linux/slab.h>
37#include <linux/export.h>
38#include <linux/errno.h>
39#include <asm/bug.h>
40#include <drm/drmP.h>
41#include <drm/drm_crtc.h>
42#include <drm/drm_edid.h>
43#include <drm/drm_fourcc.h>
44
45#include "drm_crtc_internal.h"
46
47/**
48 * drm_modeset_lock_all - take all modeset locks
49 * @dev: drm device
50 *
51 * This function takes all modeset locks, suitable where a more fine-grained
52 * scheme isn't (yet) implemented. Locks must be dropped with
53 * drm_modeset_unlock_all.
54 */
55void drm_modeset_lock_all(struct drm_device *dev)
56{
57 struct drm_crtc *crtc;
58
59 mutex_lock(&dev->mode_config.mutex);
60
61 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
62 mutex_lock_nest_lock(&crtc->mutex, &dev->mode_config.mutex);
63}
64EXPORT_SYMBOL(drm_modeset_lock_all);
65
66/**
67 * drm_modeset_unlock_all - drop all modeset locks
68 * @dev: device
69 *
70 * This function drop all modeset locks taken by drm_modeset_lock_all.
71 */
72void drm_modeset_unlock_all(struct drm_device *dev)
73{
74 struct drm_crtc *crtc;
75
76 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
77 mutex_unlock(&crtc->mutex);
78
79 mutex_unlock(&dev->mode_config.mutex);
80}
81EXPORT_SYMBOL(drm_modeset_unlock_all);
82
83/**
84 * drm_warn_on_modeset_not_all_locked - check that all modeset locks are locked
85 * @dev: device
86 *
87 * Useful as a debug assert.
88 */
89void drm_warn_on_modeset_not_all_locked(struct drm_device *dev)
90{
91 struct drm_crtc *crtc;
92
93 /* Locking is currently fubar in the panic handler. */
94 if (oops_in_progress)
95 return;
96
97 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
98 WARN_ON(!mutex_is_locked(&crtc->mutex));
99
100 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
101}
102EXPORT_SYMBOL(drm_warn_on_modeset_not_all_locked);
103
104/* Avoid boilerplate. I'm tired of typing. */
105#define DRM_ENUM_NAME_FN(fnname, list) \
106 const char *fnname(int val) \
107 { \
108 int i; \
109 for (i = 0; i < ARRAY_SIZE(list); i++) { \
110 if (list[i].type == val) \
111 return list[i].name; \
112 } \
113 return "(unknown)"; \
114 }
115
116/*
117 * Global properties
118 */
119static const struct drm_prop_enum_list drm_dpms_enum_list[] =
120{ { DRM_MODE_DPMS_ON, "On" },
121 { DRM_MODE_DPMS_STANDBY, "Standby" },
122 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
123 { DRM_MODE_DPMS_OFF, "Off" }
124};
125
126DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
127
128static const struct drm_prop_enum_list drm_plane_type_enum_list[] =
129{
130 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
131 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
132 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
133};
134
135/*
136 * Optional properties
137 */
138static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] =
139{
140 { DRM_MODE_SCALE_NONE, "None" },
141 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
142 { DRM_MODE_SCALE_CENTER, "Center" },
143 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
144};
145
146/*
147 * Non-global properties, but "required" for certain connectors.
148 */
149static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] =
150{
151 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
152 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
153 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
154};
155
156DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
157
158static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] =
159{
160 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
161 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
162 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
163};
164
165DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
166 drm_dvi_i_subconnector_enum_list)
167
168static const struct drm_prop_enum_list drm_tv_select_enum_list[] =
169{
170 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
171 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
172 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
173 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
174 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
175};
176
177DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
178
179static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] =
180{
181 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
182 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
183 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
184 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
185 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
186};
187
188DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
189 drm_tv_subconnector_enum_list)
190
191static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
192 { DRM_MODE_DIRTY_OFF, "Off" },
193 { DRM_MODE_DIRTY_ON, "On" },
194 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
195};
196
197struct drm_conn_prop_enum_list {
198 int type;
199 const char *name;
200 struct ida ida;
201};
202
203/*
204 * Connector and encoder types.
205 */
206static struct drm_conn_prop_enum_list drm_connector_enum_list[] =
207{ { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
208 { DRM_MODE_CONNECTOR_VGA, "VGA" },
209 { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
210 { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
211 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
212 { DRM_MODE_CONNECTOR_Composite, "Composite" },
213 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
214 { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
215 { DRM_MODE_CONNECTOR_Component, "Component" },
216 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
217 { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
218 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
219 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
220 { DRM_MODE_CONNECTOR_TV, "TV" },
221 { DRM_MODE_CONNECTOR_eDP, "eDP" },
222 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
223 { DRM_MODE_CONNECTOR_DSI, "DSI" },
224};
225
226static const struct drm_prop_enum_list drm_encoder_enum_list[] =
227{ { DRM_MODE_ENCODER_NONE, "None" },
228 { DRM_MODE_ENCODER_DAC, "DAC" },
229 { DRM_MODE_ENCODER_TMDS, "TMDS" },
230 { DRM_MODE_ENCODER_LVDS, "LVDS" },
231 { DRM_MODE_ENCODER_TVDAC, "TV" },
232 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
233 { DRM_MODE_ENCODER_DSI, "DSI" },
234};
235
236static const struct drm_prop_enum_list drm_subpixel_enum_list[] =
237{
238 { SubPixelUnknown, "Unknown" },
239 { SubPixelHorizontalRGB, "Horizontal RGB" },
240 { SubPixelHorizontalBGR, "Horizontal BGR" },
241 { SubPixelVerticalRGB, "Vertical RGB" },
242 { SubPixelVerticalBGR, "Vertical BGR" },
243 { SubPixelNone, "None" },
244};
245
246void drm_connector_ida_init(void)
247{
248 int i;
249
250 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
251 ida_init(&drm_connector_enum_list[i].ida);
252}
253
254void drm_connector_ida_destroy(void)
255{
256 int i;
257
258 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
259 ida_destroy(&drm_connector_enum_list[i].ida);
260}
261
262/**
263 * drm_get_encoder_name - return a string for encoder
264 * @encoder: encoder to compute name of
265 *
266 * Note that the buffer used by this function is globally shared and owned by
267 * the function itself.
268 *
269 * FIXME: This isn't really multithreading safe.
270 */
271const char *drm_get_encoder_name(const struct drm_encoder *encoder)
272{
273 static char buf[32];
274
275 snprintf(buf, 32, "%s-%d",
276 drm_encoder_enum_list[encoder->encoder_type].name,
277 encoder->base.id);
278 return buf;
279}
280EXPORT_SYMBOL(drm_get_encoder_name);
281
282/**
283 * drm_get_connector_name - return a string for connector
284 * @connector: connector to compute name of
285 *
286 * Note that the buffer used by this function is globally shared and owned by
287 * the function itself.
288 *
289 * FIXME: This isn't really multithreading safe.
290 */
291const char *drm_get_connector_name(const struct drm_connector *connector)
292{
293 static char buf[32];
294
295 snprintf(buf, 32, "%s-%d",
296 drm_connector_enum_list[connector->connector_type].name,
297 connector->connector_type_id);
298 return buf;
299}
300EXPORT_SYMBOL(drm_get_connector_name);
301
302/**
303 * drm_get_connector_status_name - return a string for connector status
304 * @status: connector status to compute name of
305 *
306 * In contrast to the other drm_get_*_name functions this one here returns a
307 * const pointer and hence is threadsafe.
308 */
309const char *drm_get_connector_status_name(enum drm_connector_status status)
310{
311 if (status == connector_status_connected)
312 return "connected";
313 else if (status == connector_status_disconnected)
314 return "disconnected";
315 else
316 return "unknown";
317}
318EXPORT_SYMBOL(drm_get_connector_status_name);
319
320/**
321 * drm_get_subpixel_order_name - return a string for a given subpixel enum
322 * @order: enum of subpixel_order
323 *
324 * Note you could abuse this and return something out of bounds, but that
325 * would be a caller error. No unscrubbed user data should make it here.
326 */
327const char *drm_get_subpixel_order_name(enum subpixel_order order)
328{
329 return drm_subpixel_enum_list[order].name;
330}
331EXPORT_SYMBOL(drm_get_subpixel_order_name);
332
333static char printable_char(int c)
334{
335 return isascii(c) && isprint(c) ? c : '?';
336}
337
338/**
339 * drm_get_format_name - return a string for drm fourcc format
340 * @format: format to compute name of
341 *
342 * Note that the buffer used by this function is globally shared and owned by
343 * the function itself.
344 *
345 * FIXME: This isn't really multithreading safe.
346 */
347const char *drm_get_format_name(uint32_t format)
348{
349 static char buf[32];
350
351 snprintf(buf, sizeof(buf),
352 "%c%c%c%c %s-endian (0x%08x)",
353 printable_char(format & 0xff),
354 printable_char((format >> 8) & 0xff),
355 printable_char((format >> 16) & 0xff),
356 printable_char((format >> 24) & 0x7f),
357 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
358 format);
359
360 return buf;
361}
362EXPORT_SYMBOL(drm_get_format_name);
363
364/**
365 * drm_mode_object_get - allocate a new modeset identifier
366 * @dev: DRM device
367 * @obj: object pointer, used to generate unique ID
368 * @obj_type: object type
369 *
370 * Create a unique identifier based on @ptr in @dev's identifier space. Used
371 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix
372 * modeset identifiers are _not_ reference counted. Hence don't use this for
373 * reference counted modeset objects like framebuffers.
374 *
375 * Returns:
376 * New unique (relative to other objects in @dev) integer identifier for the
377 * object.
378 */
379int drm_mode_object_get(struct drm_device *dev,
380 struct drm_mode_object *obj, uint32_t obj_type)
381{
382 int ret;
383
384 idr_preload(GFP_KERNEL);
385 mutex_lock(&dev->mode_config.idr_mutex);
386 ret = idr_alloc(&dev->mode_config.crtc_idr, obj, 1, 0, GFP_KERNEL);
387 if (ret >= 0) {
388 /*
389 * Set up the object linking under the protection of the idr
390 * lock so that other users can't see inconsistent state.
391 */
392 obj->id = ret;
393 obj->type = obj_type;
394 }
395 mutex_unlock(&dev->mode_config.idr_mutex);
396 idr_preload_end();
397
398 return ret < 0 ? ret : 0;
399}
400
401/**
402 * drm_mode_object_put - free a modeset identifer
403 * @dev: DRM device
404 * @object: object to free
405 *
406 * Free @id from @dev's unique identifier pool. Note that despite the _get
407 * postfix modeset identifiers are _not_ reference counted. Hence don't use this
408 * for reference counted modeset objects like framebuffers.
409 */
410void drm_mode_object_put(struct drm_device *dev,
411 struct drm_mode_object *object)
412{
413 mutex_lock(&dev->mode_config.idr_mutex);
414 idr_remove(&dev->mode_config.crtc_idr, object->id);
415 mutex_unlock(&dev->mode_config.idr_mutex);
416}
417
418/**
419 * drm_mode_object_find - look up a drm object with static lifetime
420 * @dev: drm device
421 * @id: id of the mode object
422 * @type: type of the mode object
423 *
424 * Note that framebuffers cannot be looked up with this functions - since those
425 * are reference counted, they need special treatment.
426 */
427struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
428 uint32_t id, uint32_t type)
429{
430 struct drm_mode_object *obj = NULL;
431
432 /* Framebuffers are reference counted and need their own lookup
433 * function.*/
434 WARN_ON(type == DRM_MODE_OBJECT_FB);
435
436 mutex_lock(&dev->mode_config.idr_mutex);
437 obj = idr_find(&dev->mode_config.crtc_idr, id);
438 if (!obj || (obj->type != type) || (obj->id != id))
439 obj = NULL;
440 mutex_unlock(&dev->mode_config.idr_mutex);
441
442 return obj;
443}
444EXPORT_SYMBOL(drm_mode_object_find);
445
446/**
447 * drm_framebuffer_init - initialize a framebuffer
448 * @dev: DRM device
449 * @fb: framebuffer to be initialized
450 * @funcs: ... with these functions
451 *
452 * Allocates an ID for the framebuffer's parent mode object, sets its mode
453 * functions & device file and adds it to the master fd list.
454 *
455 * IMPORTANT:
456 * This functions publishes the fb and makes it available for concurrent access
457 * by other users. Which means by this point the fb _must_ be fully set up -
458 * since all the fb attributes are invariant over its lifetime, no further
459 * locking but only correct reference counting is required.
460 *
461 * Returns:
462 * Zero on success, error code on failure.
463 */
464int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
465 const struct drm_framebuffer_funcs *funcs)
466{
467 int ret;
468
469 mutex_lock(&dev->mode_config.fb_lock);
470 kref_init(&fb->refcount);
471 INIT_LIST_HEAD(&fb->filp_head);
472 fb->dev = dev;
473 fb->funcs = funcs;
474
475 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
476 if (ret)
477 goto out;
478
479 /* Grab the idr reference. */
480 drm_framebuffer_reference(fb);
481
482 dev->mode_config.num_fb++;
483 list_add(&fb->head, &dev->mode_config.fb_list);
484out:
485 mutex_unlock(&dev->mode_config.fb_lock);
486
487 return 0;
488}
489EXPORT_SYMBOL(drm_framebuffer_init);
490
491static void drm_framebuffer_free(struct kref *kref)
492{
493 struct drm_framebuffer *fb =
494 container_of(kref, struct drm_framebuffer, refcount);
495 fb->funcs->destroy(fb);
496}
497
498static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
499 uint32_t id)
500{
501 struct drm_mode_object *obj = NULL;
502 struct drm_framebuffer *fb;
503
504 mutex_lock(&dev->mode_config.idr_mutex);
505 obj = idr_find(&dev->mode_config.crtc_idr, id);
506 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
507 fb = NULL;
508 else
509 fb = obj_to_fb(obj);
510 mutex_unlock(&dev->mode_config.idr_mutex);
511
512 return fb;
513}
514
515/**
516 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
517 * @dev: drm device
518 * @id: id of the fb object
519 *
520 * If successful, this grabs an additional reference to the framebuffer -
521 * callers need to make sure to eventually unreference the returned framebuffer
522 * again, using @drm_framebuffer_unreference.
523 */
524struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
525 uint32_t id)
526{
527 struct drm_framebuffer *fb;
528
529 mutex_lock(&dev->mode_config.fb_lock);
530 fb = __drm_framebuffer_lookup(dev, id);
531 if (fb)
532 drm_framebuffer_reference(fb);
533 mutex_unlock(&dev->mode_config.fb_lock);
534
535 return fb;
536}
537EXPORT_SYMBOL(drm_framebuffer_lookup);
538
539/**
540 * drm_framebuffer_unreference - unref a framebuffer
541 * @fb: framebuffer to unref
542 *
543 * This functions decrements the fb's refcount and frees it if it drops to zero.
544 */
545void drm_framebuffer_unreference(struct drm_framebuffer *fb)
546{
547 DRM_DEBUG("FB ID: %d\n", fb->base.id);
548 kref_put(&fb->refcount, drm_framebuffer_free);
549}
550EXPORT_SYMBOL(drm_framebuffer_unreference);
551
552/**
553 * drm_framebuffer_reference - incr the fb refcnt
554 * @fb: framebuffer
555 *
556 * This functions increments the fb's refcount.
557 */
558void drm_framebuffer_reference(struct drm_framebuffer *fb)
559{
560 DRM_DEBUG("FB ID: %d\n", fb->base.id);
561 kref_get(&fb->refcount);
562}
563EXPORT_SYMBOL(drm_framebuffer_reference);
564
565static void drm_framebuffer_free_bug(struct kref *kref)
566{
567 BUG();
568}
569
570static void __drm_framebuffer_unreference(struct drm_framebuffer *fb)
571{
572 DRM_DEBUG("FB ID: %d\n", fb->base.id);
573 kref_put(&fb->refcount, drm_framebuffer_free_bug);
574}
575
576/* dev->mode_config.fb_lock must be held! */
577static void __drm_framebuffer_unregister(struct drm_device *dev,
578 struct drm_framebuffer *fb)
579{
580 mutex_lock(&dev->mode_config.idr_mutex);
581 idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
582 mutex_unlock(&dev->mode_config.idr_mutex);
583
584 fb->base.id = 0;
585
586 __drm_framebuffer_unreference(fb);
587}
588
589/**
590 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
591 * @fb: fb to unregister
592 *
593 * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
594 * those used for fbdev. Note that the caller must hold a reference of it's own,
595 * i.e. the object may not be destroyed through this call (since it'll lead to a
596 * locking inversion).
597 */
598void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
599{
600 struct drm_device *dev = fb->dev;
601
602 mutex_lock(&dev->mode_config.fb_lock);
603 /* Mark fb as reaped and drop idr ref. */
604 __drm_framebuffer_unregister(dev, fb);
605 mutex_unlock(&dev->mode_config.fb_lock);
606}
607EXPORT_SYMBOL(drm_framebuffer_unregister_private);
608
609/**
610 * drm_framebuffer_cleanup - remove a framebuffer object
611 * @fb: framebuffer to remove
612 *
613 * Cleanup framebuffer. This function is intended to be used from the drivers
614 * ->destroy callback. It can also be used to clean up driver private
615 * framebuffers embedded into a larger structure.
616 *
617 * Note that this function does not remove the fb from active usuage - if it is
618 * still used anywhere, hilarity can ensue since userspace could call getfb on
619 * the id and get back -EINVAL. Obviously no concern at driver unload time.
620 *
621 * Also, the framebuffer will not be removed from the lookup idr - for
622 * user-created framebuffers this will happen in in the rmfb ioctl. For
623 * driver-private objects (e.g. for fbdev) drivers need to explicitly call
624 * drm_framebuffer_unregister_private.
625 */
626void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
627{
628 struct drm_device *dev = fb->dev;
629
630 mutex_lock(&dev->mode_config.fb_lock);
631 list_del(&fb->head);
632 dev->mode_config.num_fb--;
633 mutex_unlock(&dev->mode_config.fb_lock);
634}
635EXPORT_SYMBOL(drm_framebuffer_cleanup);
636
637/**
638 * drm_framebuffer_remove - remove and unreference a framebuffer object
639 * @fb: framebuffer to remove
640 *
641 * Scans all the CRTCs and planes in @dev's mode_config. If they're
642 * using @fb, removes it, setting it to NULL. Then drops the reference to the
643 * passed-in framebuffer. Might take the modeset locks.
644 *
645 * Note that this function optimizes the cleanup away if the caller holds the
646 * last reference to the framebuffer. It is also guaranteed to not take the
647 * modeset locks in this case.
648 */
649void drm_framebuffer_remove(struct drm_framebuffer *fb)
650{
651 struct drm_device *dev = fb->dev;
652 struct drm_crtc *crtc;
653 struct drm_plane *plane;
654 struct drm_mode_set set;
655 int ret;
656
657 WARN_ON(!list_empty(&fb->filp_head));
658
659 /*
660 * drm ABI mandates that we remove any deleted framebuffers from active
661 * useage. But since most sane clients only remove framebuffers they no
662 * longer need, try to optimize this away.
663 *
664 * Since we're holding a reference ourselves, observing a refcount of 1
665 * means that we're the last holder and can skip it. Also, the refcount
666 * can never increase from 1 again, so we don't need any barriers or
667 * locks.
668 *
669 * Note that userspace could try to race with use and instate a new
670 * usage _after_ we've cleared all current ones. End result will be an
671 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
672 * in this manner.
673 */
674 if (!kref_exclusive_p(&fb->refcount)) {
675 drm_modeset_lock_all(dev);
676 /* remove from any CRTC */
677 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
678 if (crtc->primary->fb == fb) {
679 /* should turn off the crtc */
680 memset(&set, 0, sizeof(struct drm_mode_set));
681 set.crtc = crtc;
682 set.fb = NULL;
683 ret = drm_mode_set_config_internal(&set);
684 if (ret)
685 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
686 }
687 }
688
689 list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
690 if (plane->fb == fb)
691 drm_plane_force_disable(plane);
692 }
693 drm_modeset_unlock_all(dev);
694 }
695
696 drm_framebuffer_unreference(fb);
697}
698EXPORT_SYMBOL(drm_framebuffer_remove);
699
700/**
701 * drm_crtc_init_with_planes - Initialise a new CRTC object with
702 * specified primary and cursor planes.
703 * @dev: DRM device
704 * @crtc: CRTC object to init
705 * @primary: Primary plane for CRTC
706 * @cursor: Cursor plane for CRTC
707 * @funcs: callbacks for the new CRTC
708 *
709 * Inits a new object created as base part of a driver crtc object.
710 *
711 * Returns:
712 * Zero on success, error code on failure.
713 */
714int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
715 struct drm_plane *primary,
716 void *cursor,
717 const struct drm_crtc_funcs *funcs)
718{
719 int ret;
720
721 crtc->dev = dev;
722 crtc->funcs = funcs;
723 crtc->invert_dimensions = false;
724
725 drm_modeset_lock_all(dev);
726#ifdef __NetBSD__
727 linux_mutex_init(&crtc->mutex);
728#else
729 mutex_init(&crtc->mutex);
730#endif
731 mutex_lock_nest_lock(&crtc->mutex, &dev->mode_config.mutex);
732
733 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
734 if (ret)
735 goto out;
736
737 crtc->base.properties = &crtc->properties;
738
739 list_add_tail(&crtc->head, &dev->mode_config.crtc_list);
740 dev->mode_config.num_crtc++;
741
742 crtc->primary = primary;
743 if (primary)
744 primary->possible_crtcs = 1 << drm_crtc_index(crtc);
745
746 out:
747 drm_modeset_unlock_all(dev);
748
749 return ret;
750}
751EXPORT_SYMBOL(drm_crtc_init_with_planes);
752
753/**
754 * drm_crtc_cleanup - Clean up the core crtc usage
755 * @crtc: CRTC to cleanup
756 *
757 * This function cleans up @crtc and removes it from the DRM mode setting
758 * core. Note that the function does *not* free the crtc structure itself,
759 * this is the responsibility of the caller.
760 */
761void drm_crtc_cleanup(struct drm_crtc *crtc)
762{
763 struct drm_device *dev = crtc->dev;
764
765 kfree(crtc->gamma_store);
766 crtc->gamma_store = NULL;
767
768 drm_mode_object_put(dev, &crtc->base);
769 list_del(&crtc->head);
770 dev->mode_config.num_crtc--;
771
772#ifdef __NetBSD__
773 linux_mutex_destroy(&crtc->mutex);
774#endif
775}
776EXPORT_SYMBOL(drm_crtc_cleanup);
777
778/**
779 * drm_crtc_index - find the index of a registered CRTC
780 * @crtc: CRTC to find index for
781 *
782 * Given a registered CRTC, return the index of that CRTC within a DRM
783 * device's list of CRTCs.
784 */
785unsigned int drm_crtc_index(struct drm_crtc *crtc)
786{
787 unsigned int index = 0;
788 struct drm_crtc *tmp;
789
790 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) {
791 if (tmp == crtc)
792 return index;
793
794 index++;
795 }
796
797 BUG();
798}
799EXPORT_SYMBOL(drm_crtc_index);
800
801/*
802 * drm_mode_remove - remove and free a mode
803 * @connector: connector list to modify
804 * @mode: mode to remove
805 *
806 * Remove @mode from @connector's mode list, then free it.
807 */
808static void drm_mode_remove(struct drm_connector *connector,
809 struct drm_display_mode *mode)
810{
811 list_del(&mode->head);
812 drm_mode_destroy(connector->dev, mode);
813}
814
815/**
816 * drm_connector_init - Init a preallocated connector
817 * @dev: DRM device
818 * @connector: the connector to init
819 * @funcs: callbacks for this connector
820 * @connector_type: user visible type of the connector
821 *
822 * Initialises a preallocated connector. Connectors should be
823 * subclassed as part of driver connector objects.
824 *
825 * Returns:
826 * Zero on success, error code on failure.
827 */
828int drm_connector_init(struct drm_device *dev,
829 struct drm_connector *connector,
830 const struct drm_connector_funcs *funcs,
831 int connector_type)
832{
833 int ret;
834 struct ida *connector_ida =
835 &drm_connector_enum_list[connector_type].ida;
836
837 drm_modeset_lock_all(dev);
838
839 ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR);
840 if (ret)
841 goto out;
842
843 connector->base.properties = &connector->properties;
844 connector->dev = dev;
845 connector->funcs = funcs;
846 connector->connector_type = connector_type;
847 connector->connector_type_id =
848 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
849 if (connector->connector_type_id < 0) {
850 ret = connector->connector_type_id;
851 drm_mode_object_put(dev, &connector->base);
852 goto out;
853 }
854 INIT_LIST_HEAD(&connector->probed_modes);
855 INIT_LIST_HEAD(&connector->modes);
856 connector->edid_blob_ptr = NULL;
857 connector->status = connector_status_unknown;
858
859 list_add_tail(&connector->head, &dev->mode_config.connector_list);
860 dev->mode_config.num_connector++;
861
862 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
863 drm_object_attach_property(&connector->base,
864 dev->mode_config.edid_property,
865 0);
866
867 drm_object_attach_property(&connector->base,
868 dev->mode_config.dpms_property, 0);
869
870 out:
871 drm_modeset_unlock_all(dev);
872
873 return ret;
874}
875EXPORT_SYMBOL(drm_connector_init);
876
877/**
878 * drm_connector_cleanup - cleans up an initialised connector
879 * @connector: connector to cleanup
880 *
881 * Cleans up the connector but doesn't free the object.
882 */
883void drm_connector_cleanup(struct drm_connector *connector)
884{
885 struct drm_device *dev = connector->dev;
886 struct drm_display_mode *mode, *t;
887
888 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
889 drm_mode_remove(connector, mode);
890
891 list_for_each_entry_safe(mode, t, &connector->modes, head)
892 drm_mode_remove(connector, mode);
893
894 ida_remove(&drm_connector_enum_list[connector->connector_type].ida,
895 connector->connector_type_id);
896
897 drm_mode_object_put(dev, &connector->base);
898 list_del(&connector->head);
899 dev->mode_config.num_connector--;
900}
901EXPORT_SYMBOL(drm_connector_cleanup);
902
903/**
904 * drm_connector_unplug_all - unregister connector userspace interfaces
905 * @dev: drm device
906 *
907 * This function unregisters all connector userspace interfaces in sysfs. Should
908 * be call when the device is disconnected, e.g. from an usb driver's
909 * ->disconnect callback.
910 */
911void drm_connector_unplug_all(struct drm_device *dev)
912{
913#ifndef __NetBSD__
914 struct drm_connector *connector;
915
916 /* taking the mode config mutex ends up in a clash with sysfs */
917 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
918 drm_sysfs_connector_remove(connector);
919#endif
920
921}
922EXPORT_SYMBOL(drm_connector_unplug_all);
923
924/**
925 * drm_bridge_init - initialize a drm transcoder/bridge
926 * @dev: drm device
927 * @bridge: transcoder/bridge to set up
928 * @funcs: bridge function table
929 *
930 * Initialises a preallocated bridge. Bridges should be
931 * subclassed as part of driver connector objects.
932 *
933 * Returns:
934 * Zero on success, error code on failure.
935 */
936int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge,
937 const struct drm_bridge_funcs *funcs)
938{
939 int ret;
940
941 drm_modeset_lock_all(dev);
942
943 ret = drm_mode_object_get(dev, &bridge->base, DRM_MODE_OBJECT_BRIDGE);
944 if (ret)
945 goto out;
946
947 bridge->dev = dev;
948 bridge->funcs = funcs;
949
950 list_add_tail(&bridge->head, &dev->mode_config.bridge_list);
951 dev->mode_config.num_bridge++;
952
953 out:
954 drm_modeset_unlock_all(dev);
955 return ret;
956}
957EXPORT_SYMBOL(drm_bridge_init);
958
959/**
960 * drm_bridge_cleanup - cleans up an initialised bridge
961 * @bridge: bridge to cleanup
962 *
963 * Cleans up the bridge but doesn't free the object.
964 */
965void drm_bridge_cleanup(struct drm_bridge *bridge)
966{
967 struct drm_device *dev = bridge->dev;
968
969 drm_modeset_lock_all(dev);
970 drm_mode_object_put(dev, &bridge->base);
971 list_del(&bridge->head);
972 dev->mode_config.num_bridge--;
973 drm_modeset_unlock_all(dev);
974}
975EXPORT_SYMBOL(drm_bridge_cleanup);
976
977/**
978 * drm_encoder_init - Init a preallocated encoder
979 * @dev: drm device
980 * @encoder: the encoder to init
981 * @funcs: callbacks for this encoder
982 * @encoder_type: user visible type of the encoder
983 *
984 * Initialises a preallocated encoder. Encoder should be
985 * subclassed as part of driver encoder objects.
986 *
987 * Returns:
988 * Zero on success, error code on failure.
989 */
990int drm_encoder_init(struct drm_device *dev,
991 struct drm_encoder *encoder,
992 const struct drm_encoder_funcs *funcs,
993 int encoder_type)
994{
995 int ret;
996
997 drm_modeset_lock_all(dev);
998
999 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
1000 if (ret)
1001 goto out;
1002
1003 encoder->dev = dev;
1004 encoder->encoder_type = encoder_type;
1005 encoder->funcs = funcs;
1006
1007 list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
1008 dev->mode_config.num_encoder++;
1009
1010 out:
1011 drm_modeset_unlock_all(dev);
1012
1013 return ret;
1014}
1015EXPORT_SYMBOL(drm_encoder_init);
1016
1017/**
1018 * drm_encoder_cleanup - cleans up an initialised encoder
1019 * @encoder: encoder to cleanup
1020 *
1021 * Cleans up the encoder but doesn't free the object.
1022 */
1023void drm_encoder_cleanup(struct drm_encoder *encoder)
1024{
1025 struct drm_device *dev = encoder->dev;
1026 drm_modeset_lock_all(dev);
1027 drm_mode_object_put(dev, &encoder->base);
1028 list_del(&encoder->head);
1029 dev->mode_config.num_encoder--;
1030 drm_modeset_unlock_all(dev);
1031}
1032EXPORT_SYMBOL(drm_encoder_cleanup);
1033
1034/**
1035 * drm_universal_plane_init - Initialize a new universal plane object
1036 * @dev: DRM device
1037 * @plane: plane object to init
1038 * @possible_crtcs: bitmask of possible CRTCs
1039 * @funcs: callbacks for the new plane
1040 * @formats: array of supported formats (%DRM_FORMAT_*)
1041 * @format_count: number of elements in @formats
1042 * @type: type of plane (overlay, primary, cursor)
1043 *
1044 * Initializes a plane object of type @type.
1045 *
1046 * Returns:
1047 * Zero on success, error code on failure.
1048 */
1049int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
1050 unsigned long possible_crtcs,
1051 const struct drm_plane_funcs *funcs,
1052 const uint32_t *formats, uint32_t format_count,
1053 enum drm_plane_type type)
1054{
1055 int ret;
1056
1057 drm_modeset_lock_all(dev);
1058
1059 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
1060 if (ret)
1061 goto out;
1062
1063 plane->base.properties = &plane->properties;
1064 plane->dev = dev;
1065 plane->funcs = funcs;
1066 plane->format_types = kmalloc(sizeof(uint32_t) * format_count,
1067 GFP_KERNEL);
1068 if (!plane->format_types) {
1069 DRM_DEBUG_KMS("out of memory when allocating plane\n");
1070 drm_mode_object_put(dev, &plane->base);
1071 ret = -ENOMEM;
1072 goto out;
1073 }
1074
1075 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
1076 plane->format_count = format_count;
1077 plane->possible_crtcs = possible_crtcs;
1078 plane->type = type;
1079
1080 list_add_tail(&plane->head, &dev->mode_config.plane_list);
1081 dev->mode_config.num_total_plane++;
1082 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1083 dev->mode_config.num_overlay_plane++;
1084
1085 drm_object_attach_property(&plane->base,
1086 dev->mode_config.plane_type_property,
1087 plane->type);
1088
1089 out:
1090 drm_modeset_unlock_all(dev);
1091
1092 return ret;
1093}
1094EXPORT_SYMBOL(drm_universal_plane_init);
1095
1096/**
1097 * drm_plane_init - Initialize a legacy plane
1098 * @dev: DRM device
1099 * @plane: plane object to init
1100 * @possible_crtcs: bitmask of possible CRTCs
1101 * @funcs: callbacks for the new plane
1102 * @formats: array of supported formats (%DRM_FORMAT_*)
1103 * @format_count: number of elements in @formats
1104 * @is_primary: plane type (primary vs overlay)
1105 *
1106 * Legacy API to initialize a DRM plane.
1107 *
1108 * New drivers should call drm_universal_plane_init() instead.
1109 *
1110 * Returns:
1111 * Zero on success, error code on failure.
1112 */
1113int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
1114 unsigned long possible_crtcs,
1115 const struct drm_plane_funcs *funcs,
1116 const uint32_t *formats, uint32_t format_count,
1117 bool is_primary)
1118{
1119 enum drm_plane_type type;
1120
1121 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
1122 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
1123 formats, format_count, type);
1124}
1125EXPORT_SYMBOL(drm_plane_init);
1126
1127/**
1128 * drm_plane_cleanup - Clean up the core plane usage
1129 * @plane: plane to cleanup
1130 *
1131 * This function cleans up @plane and removes it from the DRM mode setting
1132 * core. Note that the function does *not* free the plane structure itself,
1133 * this is the responsibility of the caller.
1134 */
1135void drm_plane_cleanup(struct drm_plane *plane)
1136{
1137 struct drm_device *dev = plane->dev;
1138
1139 drm_modeset_lock_all(dev);
1140 kfree(plane->format_types);
1141 drm_mode_object_put(dev, &plane->base);
1142
1143 BUG_ON(list_empty(&plane->head));
1144
1145 list_del(&plane->head);
1146 dev->mode_config.num_total_plane--;
1147 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1148 dev->mode_config.num_overlay_plane--;
1149 drm_modeset_unlock_all(dev);
1150}
1151EXPORT_SYMBOL(drm_plane_cleanup);
1152
1153/**
1154 * drm_plane_force_disable - Forcibly disable a plane
1155 * @plane: plane to disable
1156 *
1157 * Forces the plane to be disabled.
1158 *
1159 * Used when the plane's current framebuffer is destroyed,
1160 * and when restoring fbdev mode.
1161 */
1162void drm_plane_force_disable(struct drm_plane *plane)
1163{
1164 int ret;
1165
1166 if (!plane->fb)
1167 return;
1168
1169 ret = plane->funcs->disable_plane(plane);
1170 if (ret)
1171 DRM_ERROR("failed to disable plane with busy fb\n");
1172 /* disconnect the plane from the fb and crtc: */
1173 __drm_framebuffer_unreference(plane->fb);
1174 plane->fb = NULL;
1175 plane->crtc = NULL;
1176}
1177EXPORT_SYMBOL(drm_plane_force_disable);
1178
1179static int drm_mode_create_standard_connector_properties(struct drm_device *dev)
1180{
1181 struct drm_property *edid;
1182 struct drm_property *dpms;
1183
1184 /*
1185 * Standard properties (apply to all connectors)
1186 */
1187 edid = drm_property_create(dev, DRM_MODE_PROP_BLOB |
1188 DRM_MODE_PROP_IMMUTABLE,
1189 "EDID", 0);
1190 dev->mode_config.edid_property = edid;
1191
1192 dpms = drm_property_create_enum(dev, 0,
1193 "DPMS", drm_dpms_enum_list,
1194 ARRAY_SIZE(drm_dpms_enum_list));
1195 dev->mode_config.dpms_property = dpms;
1196
1197 return 0;
1198}
1199
1200static int drm_mode_create_standard_plane_properties(struct drm_device *dev)
1201{
1202 struct drm_property *type;
1203
1204 /*
1205 * Standard properties (apply to all planes)
1206 */
1207 type = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1208 "type", drm_plane_type_enum_list,
1209 ARRAY_SIZE(drm_plane_type_enum_list));
1210 dev->mode_config.plane_type_property = type;
1211
1212 return 0;
1213}
1214
1215/**
1216 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1217 * @dev: DRM device
1218 *
1219 * Called by a driver the first time a DVI-I connector is made.
1220 */
1221int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1222{
1223 struct drm_property *dvi_i_selector;
1224 struct drm_property *dvi_i_subconnector;
1225
1226 if (dev->mode_config.dvi_i_select_subconnector_property)
1227 return 0;
1228
1229 dvi_i_selector =
1230 drm_property_create_enum(dev, 0,
1231 "select subconnector",
1232 drm_dvi_i_select_enum_list,
1233 ARRAY_SIZE(drm_dvi_i_select_enum_list));
1234 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1235
1236 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1237 "subconnector",
1238 drm_dvi_i_subconnector_enum_list,
1239 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1240 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1241
1242 return 0;
1243}
1244EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1245
1246/**
1247 * drm_create_tv_properties - create TV specific connector properties
1248 * @dev: DRM device
1249 * @num_modes: number of different TV formats (modes) supported
1250 * @modes: array of pointers to strings containing name of each format
1251 *
1252 * Called by a driver's TV initialization routine, this function creates
1253 * the TV specific connector properties for a given device. Caller is
1254 * responsible for allocating a list of format names and passing them to
1255 * this routine.
1256 */
1257int drm_mode_create_tv_properties(struct drm_device *dev, int num_modes,
1258 const char *modes[])
1259{
1260 struct drm_property *tv_selector;
1261 struct drm_property *tv_subconnector;
1262 int i;
1263
1264 if (dev->mode_config.tv_select_subconnector_property)
1265 return 0;
1266
1267 /*
1268 * Basic connector properties
1269 */
1270 tv_selector = drm_property_create_enum(dev, 0,
1271 "select subconnector",
1272 drm_tv_select_enum_list,
1273 ARRAY_SIZE(drm_tv_select_enum_list));
1274 dev->mode_config.tv_select_subconnector_property = tv_selector;
1275
1276 tv_subconnector =
1277 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1278 "subconnector",
1279 drm_tv_subconnector_enum_list,
1280 ARRAY_SIZE(drm_tv_subconnector_enum_list));
1281 dev->mode_config.tv_subconnector_property = tv_subconnector;
1282
1283 /*
1284 * Other, TV specific properties: margins & TV modes.
1285 */
1286 dev->mode_config.tv_left_margin_property =
1287 drm_property_create_range(dev, 0, "left margin", 0, 100);
1288
1289 dev->mode_config.tv_right_margin_property =
1290 drm_property_create_range(dev, 0, "right margin", 0, 100);
1291
1292 dev->mode_config.tv_top_margin_property =
1293 drm_property_create_range(dev, 0, "top margin", 0, 100);
1294
1295 dev->mode_config.tv_bottom_margin_property =
1296 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1297
1298 dev->mode_config.tv_mode_property =
1299 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1300 "mode", num_modes);
1301 for (i = 0; i < num_modes; i++)
1302 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
1303 i, modes[i]);
1304
1305 dev->mode_config.tv_brightness_property =
1306 drm_property_create_range(dev, 0, "brightness", 0, 100);
1307
1308 dev->mode_config.tv_contrast_property =
1309 drm_property_create_range(dev, 0, "contrast", 0, 100);
1310
1311 dev->mode_config.tv_flicker_reduction_property =
1312 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1313
1314 dev->mode_config.tv_overscan_property =
1315 drm_property_create_range(dev, 0, "overscan", 0, 100);
1316
1317 dev->mode_config.tv_saturation_property =
1318 drm_property_create_range(dev, 0, "saturation", 0, 100);
1319
1320 dev->mode_config.tv_hue_property =
1321 drm_property_create_range(dev, 0, "hue", 0, 100);
1322
1323 return 0;
1324}
1325EXPORT_SYMBOL(drm_mode_create_tv_properties);
1326
1327/**
1328 * drm_mode_create_scaling_mode_property - create scaling mode property
1329 * @dev: DRM device
1330 *
1331 * Called by a driver the first time it's needed, must be attached to desired
1332 * connectors.
1333 */
1334int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1335{
1336 struct drm_property *scaling_mode;
1337
1338 if (dev->mode_config.scaling_mode_property)
1339 return 0;
1340
1341 scaling_mode =
1342 drm_property_create_enum(dev, 0, "scaling mode",
1343 drm_scaling_mode_enum_list,
1344 ARRAY_SIZE(drm_scaling_mode_enum_list));
1345
1346 dev->mode_config.scaling_mode_property = scaling_mode;
1347
1348 return 0;
1349}
1350EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1351
1352/**
1353 * drm_mode_create_dirty_property - create dirty property
1354 * @dev: DRM device
1355 *
1356 * Called by a driver the first time it's needed, must be attached to desired
1357 * connectors.
1358 */
1359int drm_mode_create_dirty_info_property(struct drm_device *dev)
1360{
1361 struct drm_property *dirty_info;
1362
1363 if (dev->mode_config.dirty_info_property)
1364 return 0;
1365
1366 dirty_info =
1367 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1368 "dirty",
1369 drm_dirty_info_enum_list,
1370 ARRAY_SIZE(drm_dirty_info_enum_list));
1371 dev->mode_config.dirty_info_property = dirty_info;
1372
1373 return 0;
1374}
1375EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
1376
1377static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
1378{
1379 uint32_t total_objects = 0;
1380
1381 total_objects += dev->mode_config.num_crtc;
1382 total_objects += dev->mode_config.num_connector;
1383 total_objects += dev->mode_config.num_encoder;
1384 total_objects += dev->mode_config.num_bridge;
1385
1386 group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL);
1387 if (!group->id_list)
1388 return -ENOMEM;
1389
1390 group->num_crtcs = 0;
1391 group->num_connectors = 0;
1392 group->num_encoders = 0;
1393 group->num_bridges = 0;
1394 return 0;
1395}
1396
1397/*
1398 * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is
1399 * the drm core's responsibility to set up mode control groups.
1400 */
1401int drm_mode_group_init_legacy_group(struct drm_device *dev,
1402 struct drm_mode_group *group)
1403{
1404 struct drm_crtc *crtc;
1405 struct drm_encoder *encoder;
1406 struct drm_connector *connector;
1407 struct drm_bridge *bridge;
1408 int ret;
1409
1410 if ((ret = drm_mode_group_init(dev, group)))
1411 return ret;
1412
1413 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
1414 group->id_list[group->num_crtcs++] = crtc->base.id;
1415
1416 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
1417 group->id_list[group->num_crtcs + group->num_encoders++] =
1418 encoder->base.id;
1419
1420 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1421 group->id_list[group->num_crtcs + group->num_encoders +
1422 group->num_connectors++] = connector->base.id;
1423
1424 list_for_each_entry(bridge, &dev->mode_config.bridge_list, head)
1425 group->id_list[group->num_crtcs + group->num_encoders +
1426 group->num_connectors + group->num_bridges++] =
1427 bridge->base.id;
1428
1429 return 0;
1430}
1431EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
1432
1433/**
1434 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
1435 * @out: drm_mode_modeinfo struct to return to the user
1436 * @in: drm_display_mode to use
1437 *
1438 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
1439 * the user.
1440 */
1441static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out,
1442 const struct drm_display_mode *in)
1443{
1444 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
1445 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
1446 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
1447 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
1448 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
1449 "timing values too large for mode info\n");
1450
1451 out->clock = in->clock;
1452 out->hdisplay = in->hdisplay;
1453 out->hsync_start = in->hsync_start;
1454 out->hsync_end = in->hsync_end;
1455 out->htotal = in->htotal;
1456 out->hskew = in->hskew;
1457 out->vdisplay = in->vdisplay;
1458 out->vsync_start = in->vsync_start;
1459 out->vsync_end = in->vsync_end;
1460 out->vtotal = in->vtotal;
1461 out->vscan = in->vscan;
1462 out->vrefresh = in->vrefresh;
1463 out->flags = in->flags;
1464 out->type = in->type;
1465 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1466 out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1467}
1468
1469/**
1470 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode
1471 * @out: drm_display_mode to return to the user
1472 * @in: drm_mode_modeinfo to use
1473 *
1474 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
1475 * the caller.
1476 *
1477 * Returns:
1478 * Zero on success, errno on failure.
1479 */
1480static int drm_crtc_convert_umode(struct drm_display_mode *out,
1481 const struct drm_mode_modeinfo *in)
1482{
1483 if (in->clock > INT_MAX || in->vrefresh > INT_MAX)
1484 return -ERANGE;
1485
1486 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
1487 return -EINVAL;
1488
1489 out->clock = in->clock;
1490 out->hdisplay = in->hdisplay;
1491 out->hsync_start = in->hsync_start;
1492 out->hsync_end = in->hsync_end;
1493 out->htotal = in->htotal;
1494 out->hskew = in->hskew;
1495 out->vdisplay = in->vdisplay;
1496 out->vsync_start = in->vsync_start;
1497 out->vsync_end = in->vsync_end;
1498 out->vtotal = in->vtotal;
1499 out->vscan = in->vscan;
1500 out->vrefresh = in->vrefresh;
1501 out->flags = in->flags;
1502 out->type = in->type;
1503 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1504 out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1505
1506 return 0;
1507}
1508
1509/**
1510 * drm_mode_getresources - get graphics configuration
1511 * @dev: drm device for the ioctl
1512 * @data: data pointer for the ioctl
1513 * @file_priv: drm file for the ioctl call
1514 *
1515 * Construct a set of configuration description structures and return
1516 * them to the user, including CRTC, connector and framebuffer configuration.
1517 *
1518 * Called by the user via ioctl.
1519 *
1520 * Returns:
1521 * Zero on success, errno on failure.
1522 */
1523int drm_mode_getresources(struct drm_device *dev, void *data,
1524 struct drm_file *file_priv)
1525{
1526 struct drm_mode_card_res *card_res = data;
1527 struct list_head *lh;
1528 struct drm_framebuffer *fb;
1529 struct drm_connector *connector;
1530 struct drm_crtc *crtc;
1531 struct drm_encoder *encoder;
1532 int ret = 0;
1533 int connector_count = 0;
1534 int crtc_count = 0;
1535 int fb_count = 0;
1536 int encoder_count = 0;
1537 int copied = 0, i;
1538 uint32_t __user *fb_id;
1539 uint32_t __user *crtc_id;
1540 uint32_t __user *connector_id;
1541 uint32_t __user *encoder_id;
1542 struct drm_mode_group *mode_group;
1543
1544 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1545 return -EINVAL;
1546
1547
1548 mutex_lock(&file_priv->fbs_lock);
1549 /*
1550 * For the non-control nodes we need to limit the list of resources
1551 * by IDs in the group list for this node
1552 */
1553 list_for_each(lh, &file_priv->fbs)
1554 fb_count++;
1555
1556 /* handle this in 4 parts */
1557 /* FBs */
1558 if (card_res->count_fbs >= fb_count) {
1559 copied = 0;
1560 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
1561 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
1562 if (put_user(fb->base.id, fb_id + copied)) {
1563 mutex_unlock(&file_priv->fbs_lock);
1564 return -EFAULT;
1565 }
1566 copied++;
1567 }
1568 }
1569 card_res->count_fbs = fb_count;
1570 mutex_unlock(&file_priv->fbs_lock);
1571
1572 drm_modeset_lock_all(dev);
1573 if (!drm_is_primary_client(file_priv)) {
1574
1575 mode_group = NULL;
1576 list_for_each(lh, &dev->mode_config.crtc_list)
1577 crtc_count++;
1578
1579 list_for_each(lh, &dev->mode_config.connector_list)
1580 connector_count++;
1581
1582 list_for_each(lh, &dev->mode_config.encoder_list)
1583 encoder_count++;
1584 } else {
1585
1586 mode_group = &file_priv->master->minor->mode_group;
1587 crtc_count = mode_group->num_crtcs;
1588 connector_count = mode_group->num_connectors;
1589 encoder_count = mode_group->num_encoders;
1590 }
1591
1592 card_res->max_height = dev->mode_config.max_height;
1593 card_res->min_height = dev->mode_config.min_height;
1594 card_res->max_width = dev->mode_config.max_width;
1595 card_res->min_width = dev->mode_config.min_width;
1596
1597 /* CRTCs */
1598 if (card_res->count_crtcs >= crtc_count) {
1599 copied = 0;
1600 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
1601 if (!mode_group) {
1602 list_for_each_entry(crtc, &dev->mode_config.crtc_list,
1603 head) {
1604 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
1605 if (put_user(crtc->base.id, crtc_id + copied)) {
1606 ret = -EFAULT;
1607 goto out;
1608 }
1609 copied++;
1610 }
1611 } else {
1612 for (i = 0; i < mode_group->num_crtcs; i++) {
1613 if (put_user(mode_group->id_list[i],
1614 crtc_id + copied)) {
1615 ret = -EFAULT;
1616 goto out;
1617 }
1618 copied++;
1619 }
1620 }
1621 }
1622 card_res->count_crtcs = crtc_count;
1623
1624 /* Encoders */
1625 if (card_res->count_encoders >= encoder_count) {
1626 copied = 0;
1627 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
1628 if (!mode_group) {
1629 list_for_each_entry(encoder,
1630 &dev->mode_config.encoder_list,
1631 head) {
1632 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
1633 drm_get_encoder_name(encoder));
1634 if (put_user(encoder->base.id, encoder_id +
1635 copied)) {
1636 ret = -EFAULT;
1637 goto out;
1638 }
1639 copied++;
1640 }
1641 } else {
1642 for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) {
1643 if (put_user(mode_group->id_list[i],
1644 encoder_id + copied)) {
1645 ret = -EFAULT;
1646 goto out;
1647 }
1648 copied++;
1649 }
1650
1651 }
1652 }
1653 card_res->count_encoders = encoder_count;
1654
1655 /* Connectors */
1656 if (card_res->count_connectors >= connector_count) {
1657 copied = 0;
1658 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
1659 if (!mode_group) {
1660 list_for_each_entry(connector,
1661 &dev->mode_config.connector_list,
1662 head) {
1663 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
1664 connector->base.id,
1665 drm_get_connector_name(connector));
1666 if (put_user(connector->base.id,
1667 connector_id + copied)) {
1668 ret = -EFAULT;
1669 goto out;
1670 }
1671 copied++;
1672 }
1673 } else {
1674 int start = mode_group->num_crtcs +
1675 mode_group->num_encoders;
1676 for (i = start; i < start + mode_group->num_connectors; i++) {
1677 if (put_user(mode_group->id_list[i],
1678 connector_id + copied)) {
1679 ret = -EFAULT;
1680 goto out;
1681 }
1682 copied++;
1683 }
1684 }
1685 }
1686 card_res->count_connectors = connector_count;
1687
1688 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
1689 card_res->count_connectors, card_res->count_encoders);
1690
1691out:
1692 drm_modeset_unlock_all(dev);
1693 return ret;
1694}
1695
1696/**
1697 * drm_mode_getcrtc - get CRTC configuration
1698 * @dev: drm device for the ioctl
1699 * @data: data pointer for the ioctl
1700 * @file_priv: drm file for the ioctl call
1701 *
1702 * Construct a CRTC configuration structure to return to the user.
1703 *
1704 * Called by the user via ioctl.
1705 *
1706 * Returns:
1707 * Zero on success, errno on failure.
1708 */
1709int drm_mode_getcrtc(struct drm_device *dev,
1710 void *data, struct drm_file *file_priv)
1711{
1712 struct drm_mode_crtc *crtc_resp = data;
1713 struct drm_crtc *crtc;
1714 struct drm_mode_object *obj;
1715 int ret = 0;
1716
1717 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1718 return -EINVAL;
1719
1720 drm_modeset_lock_all(dev);
1721
1722 obj = drm_mode_object_find(dev, crtc_resp->crtc_id,
1723 DRM_MODE_OBJECT_CRTC);
1724 if (!obj) {
1725 ret = -ENOENT;
1726 goto out;
1727 }
1728 crtc = obj_to_crtc(obj);
1729
1730 crtc_resp->x = crtc->x;
1731 crtc_resp->y = crtc->y;
1732 crtc_resp->gamma_size = crtc->gamma_size;
1733 if (crtc->primary->fb)
1734 crtc_resp->fb_id = crtc->primary->fb->base.id;
1735 else
1736 crtc_resp->fb_id = 0;
1737
1738 if (crtc->enabled) {
1739
1740 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode);
1741 crtc_resp->mode_valid = 1;
1742
1743 } else {
1744 crtc_resp->mode_valid = 0;
1745 }
1746
1747out:
1748 drm_modeset_unlock_all(dev);
1749 return ret;
1750}
1751
1752static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1753 const struct drm_file *file_priv)
1754{
1755 /*
1756 * If user-space hasn't configured the driver to expose the stereo 3D
1757 * modes, don't expose them.
1758 */
1759 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1760 return false;
1761
1762 return true;
1763}
1764
1765/**
1766 * drm_mode_getconnector - get connector configuration
1767 * @dev: drm device for the ioctl
1768 * @data: data pointer for the ioctl
1769 * @file_priv: drm file for the ioctl call
1770 *
1771 * Construct a connector configuration structure to return to the user.
1772 *
1773 * Called by the user via ioctl.
1774 *
1775 * Returns:
1776 * Zero on success, errno on failure.
1777 */
1778int drm_mode_getconnector(struct drm_device *dev, void *data,
1779 struct drm_file *file_priv)
1780{
1781 struct drm_mode_get_connector *out_resp = data;
1782 struct drm_mode_object *obj;
1783 struct drm_connector *connector;
1784 struct drm_display_mode *mode;
1785 int mode_count = 0;
1786 int props_count = 0;
1787 int encoders_count = 0;
1788 int ret = 0;
1789 int copied = 0;
1790 int i;
1791 struct drm_mode_modeinfo u_mode;
1792 struct drm_mode_modeinfo __user *mode_ptr;
1793 uint32_t __user *prop_ptr;
1794 uint64_t __user *prop_values;
1795 uint32_t __user *encoder_ptr;
1796
1797 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1798 return -EINVAL;
1799
1800 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1801
1802 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
1803
1804 mutex_lock(&dev->mode_config.mutex);
1805
1806 obj = drm_mode_object_find(dev, out_resp->connector_id,
1807 DRM_MODE_OBJECT_CONNECTOR);
1808 if (!obj) {
1809 ret = -ENOENT;
1810 goto out;
1811 }
1812 connector = obj_to_connector(obj);
1813
1814 props_count = connector->properties.count;
1815
1816 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1817 if (connector->encoder_ids[i] != 0) {
1818 encoders_count++;
1819 }
1820 }
1821
1822 if (out_resp->count_modes == 0) {
1823 connector->funcs->fill_modes(connector,
1824 dev->mode_config.max_width,
1825 dev->mode_config.max_height);
1826 }
1827
1828 /* delayed so we get modes regardless of pre-fill_modes state */
1829 list_for_each_entry(mode, &connector->modes, head)
1830 if (drm_mode_expose_to_userspace(mode, file_priv))
1831 mode_count++;
1832
1833 out_resp->connector_id = connector->base.id;
1834 out_resp->connector_type = connector->connector_type;
1835 out_resp->connector_type_id = connector->connector_type_id;
1836 out_resp->mm_width = connector->display_info.width_mm;
1837 out_resp->mm_height = connector->display_info.height_mm;
1838 out_resp->subpixel = connector->display_info.subpixel_order;
1839 out_resp->connection = connector->status;
1840 if (connector->encoder)
1841 out_resp->encoder_id = connector->encoder->base.id;
1842 else
1843 out_resp->encoder_id = 0;
1844
1845 /*
1846 * This ioctl is called twice, once to determine how much space is
1847 * needed, and the 2nd time to fill it.
1848 */
1849 if ((out_resp->count_modes >= mode_count) && mode_count) {
1850 copied = 0;
1851 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1852 list_for_each_entry(mode, &connector->modes, head) {
1853 if (!drm_mode_expose_to_userspace(mode, file_priv))
1854 continue;
1855
1856 drm_crtc_convert_to_umode(&u_mode, mode);
1857 if (copy_to_user(mode_ptr + copied,
1858 &u_mode, sizeof(u_mode))) {
1859 ret = -EFAULT;
1860 goto out;
1861 }
1862 copied++;
1863 }
1864 }
1865 out_resp->count_modes = mode_count;
1866
1867 if ((out_resp->count_props >= props_count) && props_count) {
1868 copied = 0;
1869 prop_ptr = (uint32_t __user *)(unsigned long)(out_resp->props_ptr);
1870 prop_values = (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr);
1871 for (i = 0; i < connector->properties.count; i++) {
1872 if (put_user(connector->properties.ids[i],
1873 prop_ptr + copied)) {
1874 ret = -EFAULT;
1875 goto out;
1876 }
1877
1878 if (put_user(connector->properties.values[i],
1879 prop_values + copied)) {
1880 ret = -EFAULT;
1881 goto out;
1882 }
1883 copied++;
1884 }
1885 }
1886 out_resp->count_props = props_count;
1887
1888 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1889 copied = 0;
1890 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1891 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1892 if (connector->encoder_ids[i] != 0) {
1893 if (put_user(connector->encoder_ids[i],
1894 encoder_ptr + copied)) {
1895 ret = -EFAULT;
1896 goto out;
1897 }
1898 copied++;
1899 }
1900 }
1901 }
1902 out_resp->count_encoders = encoders_count;
1903
1904out:
1905 mutex_unlock(&dev->mode_config.mutex);
1906
1907 return ret;
1908}
1909
1910/**
1911 * drm_mode_getencoder - get encoder configuration
1912 * @dev: drm device for the ioctl
1913 * @data: data pointer for the ioctl
1914 * @file_priv: drm file for the ioctl call
1915 *
1916 * Construct a encoder configuration structure to return to the user.
1917 *
1918 * Called by the user via ioctl.
1919 *
1920 * Returns:
1921 * Zero on success, errno on failure.
1922 */
1923int drm_mode_getencoder(struct drm_device *dev, void *data,
1924 struct drm_file *file_priv)
1925{
1926 struct drm_mode_get_encoder *enc_resp = data;
1927 struct drm_mode_object *obj;
1928 struct drm_encoder *encoder;
1929 int ret = 0;
1930
1931 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1932 return -EINVAL;
1933
1934 drm_modeset_lock_all(dev);
1935 obj = drm_mode_object_find(dev, enc_resp->encoder_id,
1936 DRM_MODE_OBJECT_ENCODER);
1937 if (!obj) {
1938 ret = -ENOENT;
1939 goto out;
1940 }
1941 encoder = obj_to_encoder(obj);
1942
1943 if (encoder->crtc)
1944 enc_resp->crtc_id = encoder->crtc->base.id;
1945 else
1946 enc_resp->crtc_id = 0;
1947 enc_resp->encoder_type = encoder->encoder_type;
1948 enc_resp->encoder_id = encoder->base.id;
1949 enc_resp->possible_crtcs = encoder->possible_crtcs;
1950 enc_resp->possible_clones = encoder->possible_clones;
1951
1952out:
1953 drm_modeset_unlock_all(dev);
1954 return ret;
1955}
1956
1957/**
1958 * drm_mode_getplane_res - enumerate all plane resources
1959 * @dev: DRM device
1960 * @data: ioctl data
1961 * @file_priv: DRM file info
1962 *
1963 * Construct a list of plane ids to return to the user.
1964 *
1965 * Called by the user via ioctl.
1966 *
1967 * Returns:
1968 * Zero on success, errno on failure.
1969 */
1970int drm_mode_getplane_res(struct drm_device *dev, void *data,
1971 struct drm_file *file_priv)
1972{
1973 struct drm_mode_get_plane_res *plane_resp = data;
1974 struct drm_mode_config *config;
1975 struct drm_plane *plane;
1976 uint32_t __user *plane_ptr;
1977 int copied = 0, ret = 0;
1978 unsigned num_planes;
1979
1980 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1981 return -EINVAL;
1982
1983 drm_modeset_lock_all(dev);
1984 config = &dev->mode_config;
1985
1986 if (file_priv->universal_planes)
1987 num_planes = config->num_total_plane;
1988 else
1989 num_planes = config->num_overlay_plane;
1990
1991 /*
1992 * This ioctl is called twice, once to determine how much space is
1993 * needed, and the 2nd time to fill it.
1994 */
1995 if (num_planes &&
1996 (plane_resp->count_planes >= num_planes)) {
1997 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
1998
1999 list_for_each_entry(plane, &config->plane_list, head) {
2000 /*
2001 * Unless userspace set the 'universal planes'
2002 * capability bit, only advertise overlays.
2003 */
2004 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
2005 !file_priv->universal_planes)
2006 continue;
2007
2008 if (put_user(plane->base.id, plane_ptr + copied)) {
2009 ret = -EFAULT;
2010 goto out;
2011 }
2012 copied++;
2013 }
2014 }
2015 plane_resp->count_planes = num_planes;
2016
2017out:
2018 drm_modeset_unlock_all(dev);
2019 return ret;
2020}
2021
2022/**
2023 * drm_mode_getplane - get plane configuration
2024 * @dev: DRM device
2025 * @data: ioctl data
2026 * @file_priv: DRM file info
2027 *
2028 * Construct a plane configuration structure to return to the user.
2029 *
2030 * Called by the user via ioctl.
2031 *
2032 * Returns:
2033 * Zero on success, errno on failure.
2034 */
2035int drm_mode_getplane(struct drm_device *dev, void *data,
2036 struct drm_file *file_priv)
2037{
2038 struct drm_mode_get_plane *plane_resp = data;
2039 struct drm_mode_object *obj;
2040 struct drm_plane *plane;
2041 uint32_t __user *format_ptr;
2042 int ret = 0;
2043
2044 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2045 return -EINVAL;
2046
2047 drm_modeset_lock_all(dev);
2048 obj = drm_mode_object_find(dev, plane_resp->plane_id,
2049 DRM_MODE_OBJECT_PLANE);
2050 if (!obj) {
2051 ret = -ENOENT;
2052 goto out;
2053 }
2054 plane = obj_to_plane(obj);
2055
2056 if (plane->crtc)
2057 plane_resp->crtc_id = plane->crtc->base.id;
2058 else
2059 plane_resp->crtc_id = 0;
2060
2061 if (plane->fb)
2062 plane_resp->fb_id = plane->fb->base.id;
2063 else
2064 plane_resp->fb_id = 0;
2065
2066 plane_resp->plane_id = plane->base.id;
2067 plane_resp->possible_crtcs = plane->possible_crtcs;
2068 plane_resp->gamma_size = 0;
2069
2070 /*
2071 * This ioctl is called twice, once to determine how much space is
2072 * needed, and the 2nd time to fill it.
2073 */
2074 if (plane->format_count &&
2075 (plane_resp->count_format_types >= plane->format_count)) {
2076 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
2077 if (copy_to_user(format_ptr,
2078 plane->format_types,
2079 sizeof(uint32_t) * plane->format_count)) {
2080 ret = -EFAULT;
2081 goto out;
2082 }
2083 }
2084 plane_resp->count_format_types = plane->format_count;
2085
2086out:
2087 drm_modeset_unlock_all(dev);
2088 return ret;
2089}
2090
2091/**
2092 * drm_mode_setplane - configure a plane's configuration
2093 * @dev: DRM device
2094 * @data: ioctl data*
2095 * @file_priv: DRM file info
2096 *
2097 * Set plane configuration, including placement, fb, scaling, and other factors.
2098 * Or pass a NULL fb to disable.
2099 *
2100 * Returns:
2101 * Zero on success, errno on failure.
2102 */
2103int drm_mode_setplane(struct drm_device *dev, void *data,
2104 struct drm_file *file_priv)
2105{
2106 struct drm_mode_set_plane *plane_req = data;
2107 struct drm_mode_object *obj;
2108 struct drm_plane *plane;
2109 struct drm_crtc *crtc;
2110 struct drm_framebuffer *fb = NULL, *old_fb = NULL;
2111 int ret = 0;
2112 unsigned int fb_width, fb_height;
2113 int i;
2114
2115 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2116 return -EINVAL;
2117
2118 /*
2119 * First, find the plane, crtc, and fb objects. If not available,
2120 * we don't bother to call the driver.
2121 */
2122 obj = drm_mode_object_find(dev, plane_req->plane_id,
2123 DRM_MODE_OBJECT_PLANE);
2124 if (!obj) {
2125 DRM_DEBUG_KMS("Unknown plane ID %d\n",
2126 plane_req->plane_id);
2127 return -ENOENT;
2128 }
2129 plane = obj_to_plane(obj);
2130
2131 /* No fb means shut it down */
2132 if (!plane_req->fb_id) {
2133 drm_modeset_lock_all(dev);
2134 old_fb = plane->fb;
2135 plane->funcs->disable_plane(plane);
2136 plane->crtc = NULL;
2137 plane->fb = NULL;
2138 drm_modeset_unlock_all(dev);
2139 goto out;
2140 }
2141
2142 obj = drm_mode_object_find(dev, plane_req->crtc_id,
2143 DRM_MODE_OBJECT_CRTC);
2144 if (!obj) {
2145 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
2146 plane_req->crtc_id);
2147 ret = -ENOENT;
2148 goto out;
2149 }
2150 crtc = obj_to_crtc(obj);
2151
2152 fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
2153 if (!fb) {
2154 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
2155 plane_req->fb_id);
2156 ret = -ENOENT;
2157 goto out;
2158 }
2159
2160 /* Check whether this plane supports the fb pixel format. */
2161 for (i = 0; i < plane->format_count; i++)
2162 if (fb->pixel_format == plane->format_types[i])
2163 break;
2164 if (i == plane->format_count) {
2165 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2166 drm_get_format_name(fb->pixel_format));
2167 ret = -EINVAL;
2168 goto out;
2169 }
2170
2171 fb_width = fb->width << 16;
2172 fb_height = fb->height << 16;
2173
2174 /* Make sure source coordinates are inside the fb. */
2175 if (plane_req->src_w > fb_width ||
2176 plane_req->src_x > fb_width - plane_req->src_w ||
2177 plane_req->src_h > fb_height ||
2178 plane_req->src_y > fb_height - plane_req->src_h) {
2179 DRM_DEBUG_KMS("Invalid source coordinates "
2180 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
2181 plane_req->src_w >> 16,
2182 ((plane_req->src_w & 0xffff) * 15625) >> 10,
2183 plane_req->src_h >> 16,
2184 ((plane_req->src_h & 0xffff) * 15625) >> 10,
2185 plane_req->src_x >> 16,
2186 ((plane_req->src_x & 0xffff) * 15625) >> 10,
2187 plane_req->src_y >> 16,
2188 ((plane_req->src_y & 0xffff) * 15625) >> 10);
2189 ret = -ENOSPC;
2190 goto out;
2191 }
2192
2193 /* Give drivers some help against integer overflows */
2194 if (plane_req->crtc_w > INT_MAX ||
2195 plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w ||
2196 plane_req->crtc_h > INT_MAX ||
2197 plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) {
2198 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
2199 plane_req->crtc_w, plane_req->crtc_h,
2200 plane_req->crtc_x, plane_req->crtc_y);
2201 ret = -ERANGE;
2202 goto out;
2203 }
2204
2205 drm_modeset_lock_all(dev);
2206 ret = plane->funcs->update_plane(plane, crtc, fb,
2207 plane_req->crtc_x, plane_req->crtc_y,
2208 plane_req->crtc_w, plane_req->crtc_h,
2209 plane_req->src_x, plane_req->src_y,
2210 plane_req->src_w, plane_req->src_h);
2211 if (!ret) {
2212 old_fb = plane->fb;
2213 plane->crtc = crtc;
2214 plane->fb = fb;
2215 fb = NULL;
2216 }
2217 drm_modeset_unlock_all(dev);
2218
2219out:
2220 if (fb)
2221 drm_framebuffer_unreference(fb);
2222 if (old_fb)
2223 drm_framebuffer_unreference(old_fb);
2224
2225 return ret;
2226}
2227
2228/**
2229 * drm_mode_set_config_internal - helper to call ->set_config
2230 * @set: modeset config to set
2231 *
2232 * This is a little helper to wrap internal calls to the ->set_config driver
2233 * interface. The only thing it adds is correct refcounting dance.
2234 *
2235 * Returns:
2236 * Zero on success, errno on failure.
2237 */
2238int drm_mode_set_config_internal(struct drm_mode_set *set)
2239{
2240 struct drm_crtc *crtc = set->crtc;
2241 struct drm_framebuffer *fb;
2242 struct drm_crtc *tmp;
2243 int ret;
2244
2245 /*
2246 * NOTE: ->set_config can also disable other crtcs (if we steal all
2247 * connectors from it), hence we need to refcount the fbs across all
2248 * crtcs. Atomic modeset will have saner semantics ...
2249 */
2250 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head)
2251 tmp->old_fb = tmp->primary->fb;
2252
2253 fb = set->fb;
2254
2255 ret = crtc->funcs->set_config(set);
2256 if (ret == 0) {
2257 crtc->primary->crtc = crtc;
2258
2259 /* crtc->fb must be updated by ->set_config, enforces this. */
2260 WARN_ON(fb != crtc->primary->fb);
2261 }
2262
2263 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) {
2264 if (tmp->primary->fb)
2265 drm_framebuffer_reference(tmp->primary->fb);
2266 if (tmp->old_fb)
2267 drm_framebuffer_unreference(tmp->old_fb);
2268 }
2269
2270 return ret;
2271}
2272EXPORT_SYMBOL(drm_mode_set_config_internal);
2273
2274/**
2275 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
2276 * CRTC viewport
2277 * @crtc: CRTC that framebuffer will be displayed on
2278 * @x: x panning
2279 * @y: y panning
2280 * @mode: mode that framebuffer will be displayed under
2281 * @fb: framebuffer to check size of
2282 */
2283int drm_crtc_check_viewport(const struct drm_crtc *crtc,
2284 int x, int y,
2285 const struct drm_display_mode *mode,
2286 const struct drm_framebuffer *fb)
2287
2288{
2289 int hdisplay, vdisplay;
2290
2291 hdisplay = mode->hdisplay;
2292 vdisplay = mode->vdisplay;
2293
2294 if (drm_mode_is_stereo(mode)) {
2295 struct drm_display_mode adjusted = *mode;
2296
2297 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE);
2298 hdisplay = adjusted.crtc_hdisplay;
2299 vdisplay = adjusted.crtc_vdisplay;
2300 }
2301
2302 if (crtc->invert_dimensions)
2303 swap(hdisplay, vdisplay);
2304
2305 if (hdisplay > fb->width ||
2306 vdisplay > fb->height ||
2307 x > fb->width - hdisplay ||
2308 y > fb->height - vdisplay) {
2309 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n",
2310 fb->width, fb->height, hdisplay, vdisplay, x, y,
2311 crtc->invert_dimensions ? " (inverted)" : "");
2312 return -ENOSPC;
2313 }
2314
2315 return 0;
2316}
2317EXPORT_SYMBOL(drm_crtc_check_viewport);
2318
2319/**
2320 * drm_mode_setcrtc - set CRTC configuration
2321 * @dev: drm device for the ioctl
2322 * @data: data pointer for the ioctl
2323 * @file_priv: drm file for the ioctl call
2324 *
2325 * Build a new CRTC configuration based on user request.
2326 *
2327 * Called by the user via ioctl.
2328 *
2329 * Returns:
2330 * Zero on success, errno on failure.
2331 */
2332int drm_mode_setcrtc(struct drm_device *dev, void *data,
2333 struct drm_file *file_priv)
2334{
2335 struct drm_mode_config *config = &dev->mode_config;
2336 struct drm_mode_crtc *crtc_req = data;
2337 struct drm_mode_object *obj;
2338 struct drm_crtc *crtc;
2339 struct drm_connector **connector_set = NULL, *connector;
2340 struct drm_framebuffer *fb = NULL;
2341 struct drm_display_mode *mode = NULL;
2342 struct drm_mode_set set;
2343 uint32_t __user *set_connectors_ptr;
2344 int ret;
2345 int i;
2346
2347 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2348 return -EINVAL;
2349
2350 /* For some reason crtc x/y offsets are signed internally. */
2351 if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX)
2352 return -ERANGE;
2353
2354 drm_modeset_lock_all(dev);
2355 obj = drm_mode_object_find(dev, crtc_req->crtc_id,
2356 DRM_MODE_OBJECT_CRTC);
2357 if (!obj) {
2358 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
2359 ret = -ENOENT;
2360 goto out;
2361 }
2362 crtc = obj_to_crtc(obj);
2363 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
2364
2365 if (crtc_req->mode_valid) {
2366 /* If we have a mode we need a framebuffer. */
2367 /* If we pass -1, set the mode with the currently bound fb */
2368 if (crtc_req->fb_id == -1) {
2369 if (!crtc->primary->fb) {
2370 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
2371 ret = -EINVAL;
2372 goto out;
2373 }
2374 fb = crtc->primary->fb;
2375 /* Make refcounting symmetric with the lookup path. */
2376 drm_framebuffer_reference(fb);
2377 } else {
2378 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
2379 if (!fb) {
2380 DRM_DEBUG_KMS("Unknown FB ID%d\n",
2381 crtc_req->fb_id);
2382 ret = -ENOENT;
2383 goto out;
2384 }
2385 }
2386
2387 mode = drm_mode_create(dev);
2388 if (!mode) {
2389 ret = -ENOMEM;
2390 goto out;
2391 }
2392
2393 ret = drm_crtc_convert_umode(mode, &crtc_req->mode);
2394 if (ret) {
2395 DRM_DEBUG_KMS("Invalid mode\n");
2396 goto out;
2397 }
2398
2399 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
2400
2401 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
2402 mode, fb);
2403 if (ret)
2404 goto out;
2405
2406 }
2407
2408 if (crtc_req->count_connectors == 0 && mode) {
2409 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
2410 ret = -EINVAL;
2411 goto out;
2412 }
2413
2414 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
2415 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
2416 crtc_req->count_connectors);
2417 ret = -EINVAL;
2418 goto out;
2419 }
2420
2421 if (crtc_req->count_connectors > 0) {
2422 u32 out_id;
2423
2424 /* Avoid unbounded kernel memory allocation */
2425 if (crtc_req->count_connectors > config->num_connector) {
2426 ret = -EINVAL;
2427 goto out;
2428 }
2429
2430 connector_set = kmalloc(crtc_req->count_connectors *
2431 sizeof(struct drm_connector *),
2432 GFP_KERNEL);
2433 if (!connector_set) {
2434 ret = -ENOMEM;
2435 goto out;
2436 }
2437
2438 for (i = 0; i < crtc_req->count_connectors; i++) {
2439 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
2440 if (get_user(out_id, &set_connectors_ptr[i])) {
2441 ret = -EFAULT;
2442 goto out;
2443 }
2444
2445 obj = drm_mode_object_find(dev, out_id,
2446 DRM_MODE_OBJECT_CONNECTOR);
2447 if (!obj) {
2448 DRM_DEBUG_KMS("Connector id %d unknown\n",
2449 out_id);
2450 ret = -ENOENT;
2451 goto out;
2452 }
2453 connector = obj_to_connector(obj);
2454 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
2455 connector->base.id,
2456 drm_get_connector_name(connector));
2457
2458 connector_set[i] = connector;
2459 }
2460 }
2461
2462 set.crtc = crtc;
2463 set.x = crtc_req->x;
2464 set.y = crtc_req->y;
2465 set.mode = mode;
2466 set.connectors = connector_set;
2467 set.num_connectors = crtc_req->count_connectors;
2468 set.fb = fb;
2469 ret = drm_mode_set_config_internal(&set);
2470
2471out:
2472 if (fb)
2473 drm_framebuffer_unreference(fb);
2474
2475 kfree(connector_set);
2476 drm_mode_destroy(dev, mode);
2477 drm_modeset_unlock_all(dev);
2478 return ret;
2479}
2480
2481static int drm_mode_cursor_common(struct drm_device *dev,
2482 struct drm_mode_cursor2 *req,
2483 struct drm_file *file_priv)
2484{
2485 struct drm_mode_object *obj;
2486 struct drm_crtc *crtc;
2487 int ret = 0;
2488
2489 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2490 return -EINVAL;
2491
2492 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
2493 return -EINVAL;
2494
2495 obj = drm_mode_object_find(dev, req->crtc_id, DRM_MODE_OBJECT_CRTC);
2496 if (!obj) {
2497 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
2498 return -ENOENT;
2499 }
2500 crtc = obj_to_crtc(obj);
2501
2502 mutex_lock(&crtc->mutex);
2503 if (req->flags & DRM_MODE_CURSOR_BO) {
2504 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
2505 ret = -ENXIO;
2506 goto out;
2507 }
2508 /* Turns off the cursor if handle is 0 */
2509 if (crtc->funcs->cursor_set2)
2510 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
2511 req->width, req->height, req->hot_x, req->hot_y);
2512 else
2513 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
2514 req->width, req->height);
2515 }
2516
2517 if (req->flags & DRM_MODE_CURSOR_MOVE) {
2518 if (crtc->funcs->cursor_move) {
2519 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
2520 } else {
2521 ret = -EFAULT;
2522 goto out;
2523 }
2524 }
2525out:
2526 mutex_unlock(&crtc->mutex);
2527
2528 return ret;
2529
2530}
2531
2532
2533/**
2534 * drm_mode_cursor_ioctl - set CRTC's cursor configuration
2535 * @dev: drm device for the ioctl
2536 * @data: data pointer for the ioctl
2537 * @file_priv: drm file for the ioctl call
2538 *
2539 * Set the cursor configuration based on user request.
2540 *
2541 * Called by the user via ioctl.
2542 *
2543 * Returns:
2544 * Zero on success, errno on failure.
2545 */
2546int drm_mode_cursor_ioctl(struct drm_device *dev,
2547 void *data, struct drm_file *file_priv)
2548{
2549 struct drm_mode_cursor *req = data;
2550 struct drm_mode_cursor2 new_req;
2551
2552 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
2553 new_req.hot_x = new_req.hot_y = 0;
2554
2555 return drm_mode_cursor_common(dev, &new_req, file_priv);
2556}
2557
2558/**
2559 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration
2560 * @dev: drm device for the ioctl
2561 * @data: data pointer for the ioctl
2562 * @file_priv: drm file for the ioctl call
2563 *
2564 * Set the cursor configuration based on user request. This implements the 2nd
2565 * version of the cursor ioctl, which allows userspace to additionally specify
2566 * the hotspot of the pointer.
2567 *
2568 * Called by the user via ioctl.
2569 *
2570 * Returns:
2571 * Zero on success, errno on failure.
2572 */
2573int drm_mode_cursor2_ioctl(struct drm_device *dev,
2574 void *data, struct drm_file *file_priv)
2575{
2576 struct drm_mode_cursor2 *req = data;
2577 return drm_mode_cursor_common(dev, req, file_priv);
2578}
2579
2580/**
2581 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description
2582 * @bpp: bits per pixels
2583 * @depth: bit depth per pixel
2584 *
2585 * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
2586 * Useful in fbdev emulation code, since that deals in those values.
2587 */
2588uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
2589{
2590 uint32_t fmt;
2591
2592 switch (bpp) {
2593 case 8:
2594 fmt = DRM_FORMAT_C8;
2595 break;
2596 case 16:
2597 if (depth == 15)
2598 fmt = DRM_FORMAT_XRGB1555;
2599 else
2600 fmt = DRM_FORMAT_RGB565;
2601 break;
2602 case 24:
2603 fmt = DRM_FORMAT_RGB888;
2604 break;
2605 case 32:
2606 if (depth == 24)
2607 fmt = DRM_FORMAT_XRGB8888;
2608 else if (depth == 30)
2609 fmt = DRM_FORMAT_XRGB2101010;
2610 else
2611 fmt = DRM_FORMAT_ARGB8888;
2612 break;
2613 default:
2614 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
2615 fmt = DRM_FORMAT_XRGB8888;
2616 break;
2617 }
2618
2619 return fmt;
2620}
2621EXPORT_SYMBOL(drm_mode_legacy_fb_format);
2622
2623/**
2624 * drm_mode_addfb - add an FB to the graphics configuration
2625 * @dev: drm device for the ioctl
2626 * @data: data pointer for the ioctl
2627 * @file_priv: drm file for the ioctl call
2628 *
2629 * Add a new FB to the specified CRTC, given a user request. This is the
2630 * original addfb ioclt which only supported RGB formats.
2631 *
2632 * Called by the user via ioctl.
2633 *
2634 * Returns:
2635 * Zero on success, errno on failure.
2636 */
2637int drm_mode_addfb(struct drm_device *dev,
2638 void *data, struct drm_file *file_priv)
2639{
2640 struct drm_mode_fb_cmd *or = data;
2641 static const struct drm_mode_fb_cmd2 zero_fbcmd;
2642 struct drm_mode_fb_cmd2 r = zero_fbcmd;
2643 struct drm_mode_config *config = &dev->mode_config;
2644 struct drm_framebuffer *fb;
2645 int ret = 0;
2646
2647 /* Use new struct with format internally */
2648 r.fb_id = or->fb_id;
2649 r.width = or->width;
2650 r.height = or->height;
2651 r.pitches[0] = or->pitch;
2652 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
2653 r.handles[0] = or->handle;
2654
2655 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2656 return -EINVAL;
2657
2658 if ((config->min_width > r.width) || (r.width > config->max_width))
2659 return -EINVAL;
2660
2661 if ((config->min_height > r.height) || (r.height > config->max_height))
2662 return -EINVAL;
2663
2664 fb = dev->mode_config.funcs->fb_create(dev, file_priv, &r);
2665 if (IS_ERR(fb)) {
2666 DRM_DEBUG_KMS("could not create framebuffer\n");
2667 return PTR_ERR(fb);
2668 }
2669
2670 mutex_lock(&file_priv->fbs_lock);
2671 or->fb_id = fb->base.id;
2672 list_add(&fb->filp_head, &file_priv->fbs);
2673 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
2674 mutex_unlock(&file_priv->fbs_lock);
2675
2676 return ret;
2677}
2678
2679static int format_check(const struct drm_mode_fb_cmd2 *r)
2680{
2681 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
2682
2683 switch (format) {
2684 case DRM_FORMAT_C8:
2685 case DRM_FORMAT_RGB332:
2686 case DRM_FORMAT_BGR233:
2687 case DRM_FORMAT_XRGB4444:
2688 case DRM_FORMAT_XBGR4444:
2689 case DRM_FORMAT_RGBX4444:
2690 case DRM_FORMAT_BGRX4444:
2691 case DRM_FORMAT_ARGB4444:
2692 case DRM_FORMAT_ABGR4444:
2693 case DRM_FORMAT_RGBA4444:
2694 case DRM_FORMAT_BGRA4444:
2695 case DRM_FORMAT_XRGB1555:
2696 case DRM_FORMAT_XBGR1555:
2697 case DRM_FORMAT_RGBX5551:
2698 case DRM_FORMAT_BGRX5551:
2699 case DRM_FORMAT_ARGB1555:
2700 case DRM_FORMAT_ABGR1555:
2701 case DRM_FORMAT_RGBA5551:
2702 case DRM_FORMAT_BGRA5551:
2703 case DRM_FORMAT_RGB565:
2704 case DRM_FORMAT_BGR565:
2705 case DRM_FORMAT_RGB888:
2706 case DRM_FORMAT_BGR888:
2707 case DRM_FORMAT_XRGB8888:
2708 case DRM_FORMAT_XBGR8888:
2709 case DRM_FORMAT_RGBX8888:
2710 case DRM_FORMAT_BGRX8888:
2711 case DRM_FORMAT_ARGB8888:
2712 case DRM_FORMAT_ABGR8888:
2713 case DRM_FORMAT_RGBA8888:
2714 case DRM_FORMAT_BGRA8888:
2715 case DRM_FORMAT_XRGB2101010:
2716 case DRM_FORMAT_XBGR2101010:
2717 case DRM_FORMAT_RGBX1010102:
2718 case DRM_FORMAT_BGRX1010102:
2719 case DRM_FORMAT_ARGB2101010:
2720 case DRM_FORMAT_ABGR2101010:
2721 case DRM_FORMAT_RGBA1010102:
2722 case DRM_FORMAT_BGRA1010102:
2723 case DRM_FORMAT_YUYV:
2724 case DRM_FORMAT_YVYU:
2725 case DRM_FORMAT_UYVY:
2726 case DRM_FORMAT_VYUY:
2727 case DRM_FORMAT_AYUV:
2728 case DRM_FORMAT_NV12:
2729 case DRM_FORMAT_NV21:
2730 case DRM_FORMAT_NV16:
2731 case DRM_FORMAT_NV61:
2732 case DRM_FORMAT_NV24:
2733 case DRM_FORMAT_NV42:
2734 case DRM_FORMAT_YUV410:
2735 case DRM_FORMAT_YVU410:
2736 case DRM_FORMAT_YUV411:
2737 case DRM_FORMAT_YVU411:
2738 case DRM_FORMAT_YUV420:
2739 case DRM_FORMAT_YVU420:
2740 case DRM_FORMAT_YUV422:
2741 case DRM_FORMAT_YVU422:
2742 case DRM_FORMAT_YUV444:
2743 case DRM_FORMAT_YVU444:
2744 return 0;
2745 default:
2746 DRM_DEBUG_KMS("invalid pixel format %s\n",
2747 drm_get_format_name(r->pixel_format));
2748 return -EINVAL;
2749 }
2750}
2751
2752static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
2753{
2754 int ret, hsub, vsub, num_planes, i;
2755
2756 ret = format_check(r);
2757 if (ret) {
2758 DRM_DEBUG_KMS("bad framebuffer format %s\n",
2759 drm_get_format_name(r->pixel_format));
2760 return ret;
2761 }
2762
2763 hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
2764 vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
2765 num_planes = drm_format_num_planes(r->pixel_format);
2766
2767 if (r->width == 0 || r->width % hsub) {
2768 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->height);
2769 return -EINVAL;
2770 }
2771
2772 if (r->height == 0 || r->height % vsub) {
2773 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
2774 return -EINVAL;
2775 }
2776
2777 for (i = 0; i < num_planes; i++) {
2778 unsigned int width = r->width / (i != 0 ? hsub : 1);
2779 unsigned int height = r->height / (i != 0 ? vsub : 1);
2780 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
2781
2782 if (!r->handles[i]) {
2783 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
2784 return -EINVAL;
2785 }
2786
2787 if ((uint64_t) width * cpp > UINT_MAX)
2788 return -ERANGE;
2789
2790 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
2791 return -ERANGE;
2792
2793 if (r->pitches[i] < width * cpp) {
2794 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
2795 return -EINVAL;
2796 }
2797 }
2798
2799 return 0;
2800}
2801
2802/**
2803 * drm_mode_addfb2 - add an FB to the graphics configuration
2804 * @dev: drm device for the ioctl
2805 * @data: data pointer for the ioctl
2806 * @file_priv: drm file for the ioctl call
2807 *
2808 * Add a new FB to the specified CRTC, given a user request with format. This is
2809 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
2810 * and uses fourcc codes as pixel format specifiers.
2811 *
2812 * Called by the user via ioctl.
2813 *
2814 * Returns:
2815 * Zero on success, errno on failure.
2816 */
2817int drm_mode_addfb2(struct drm_device *dev,
2818 void *data, struct drm_file *file_priv)
2819{
2820 struct drm_mode_fb_cmd2 *r = data;
2821 struct drm_mode_config *config = &dev->mode_config;
2822 struct drm_framebuffer *fb;
2823 int ret;
2824
2825 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2826 return -EINVAL;
2827
2828 if (r->flags & ~DRM_MODE_FB_INTERLACED) {
2829 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
2830 return -EINVAL;
2831 }
2832
2833 if ((config->min_width > r->width) || (r->width > config->max_width)) {
2834 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
2835 r->width, config->min_width, config->max_width);
2836 return -EINVAL;
2837 }
2838 if ((config->min_height > r->height) || (r->height > config->max_height)) {
2839 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
2840 r->height, config->min_height, config->max_height);
2841 return -EINVAL;
2842 }
2843
2844 ret = framebuffer_check(r);
2845 if (ret)
2846 return ret;
2847
2848 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
2849 if (IS_ERR(fb)) {
2850 DRM_DEBUG_KMS("could not create framebuffer\n");
2851 return PTR_ERR(fb);
2852 }
2853
2854 mutex_lock(&file_priv->fbs_lock);
2855 r->fb_id = fb->base.id;
2856 list_add(&fb->filp_head, &file_priv->fbs);
2857 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
2858 mutex_unlock(&file_priv->fbs_lock);
2859
2860
2861 return ret;
2862}
2863
2864/**
2865 * drm_mode_rmfb - remove an FB from the configuration
2866 * @dev: drm device for the ioctl
2867 * @data: data pointer for the ioctl
2868 * @file_priv: drm file for the ioctl call
2869 *
2870 * Remove the FB specified by the user.
2871 *
2872 * Called by the user via ioctl.
2873 *
2874 * Returns:
2875 * Zero on success, errno on failure.
2876 */
2877int drm_mode_rmfb(struct drm_device *dev,
2878 void *data, struct drm_file *file_priv)
2879{
2880 struct drm_framebuffer *fb = NULL;
2881 struct drm_framebuffer *fbl = NULL;
2882 uint32_t *id = data;
2883 int found = 0;
2884
2885 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2886 return -EINVAL;
2887
2888 mutex_lock(&file_priv->fbs_lock);
2889 mutex_lock(&dev->mode_config.fb_lock);
2890 fb = __drm_framebuffer_lookup(dev, *id);
2891 if (!fb)
2892 goto fail_lookup;
2893
2894 list_for_each_entry(fbl, &file_priv->fbs, filp_head)
2895 if (fb == fbl)
2896 found = 1;
2897 if (!found)
2898 goto fail_lookup;
2899
2900 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
2901 __drm_framebuffer_unregister(dev, fb);
2902
2903 list_del_init(&fb->filp_head);
2904 mutex_unlock(&dev->mode_config.fb_lock);
2905 mutex_unlock(&file_priv->fbs_lock);
2906
2907 drm_framebuffer_remove(fb);
2908
2909 return 0;
2910
2911fail_lookup:
2912 mutex_unlock(&dev->mode_config.fb_lock);
2913 mutex_unlock(&file_priv->fbs_lock);
2914
2915 return -ENOENT;
2916}
2917
2918/**
2919 * drm_mode_getfb - get FB info
2920 * @dev: drm device for the ioctl
2921 * @data: data pointer for the ioctl
2922 * @file_priv: drm file for the ioctl call
2923 *
2924 * Lookup the FB given its ID and return info about it.
2925 *
2926 * Called by the user via ioctl.
2927 *
2928 * Returns:
2929 * Zero on success, errno on failure.
2930 */
2931int drm_mode_getfb(struct drm_device *dev,
2932 void *data, struct drm_file *file_priv)
2933{
2934 struct drm_mode_fb_cmd *r = data;
2935 struct drm_framebuffer *fb;
2936 int ret;
2937
2938 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2939 return -EINVAL;
2940
2941 fb = drm_framebuffer_lookup(dev, r->fb_id);
2942 if (!fb)
2943 return -ENOENT;
2944
2945 r->height = fb->height;
2946 r->width = fb->width;
2947 r->depth = fb->depth;
2948 r->bpp = fb->bits_per_pixel;
2949 r->pitch = fb->pitches[0];
2950 if (fb->funcs->create_handle) {
2951 if (file_priv->is_master ||
2952#ifdef __NetBSD__
2953 DRM_SUSER() ||
2954#else
2955 capable(CAP_SYS_ADMIN) ||
2956#endif
2957 drm_is_control_client(file_priv)) {
2958 ret = fb->funcs->create_handle(fb, file_priv,
2959 &r->handle);
2960 } else {
2961 /* GET_FB() is an unprivileged ioctl so we must not
2962 * return a buffer-handle to non-master processes! For
2963 * backwards-compatibility reasons, we cannot make
2964 * GET_FB() privileged, so just return an invalid handle
2965 * for non-masters. */
2966 r->handle = 0;
2967 ret = 0;
2968 }
2969 } else {
2970 ret = -ENODEV;
2971 }
2972
2973 drm_framebuffer_unreference(fb);
2974
2975 return ret;
2976}
2977
2978/**
2979 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
2980 * @dev: drm device for the ioctl
2981 * @data: data pointer for the ioctl
2982 * @file_priv: drm file for the ioctl call
2983 *
2984 * Lookup the FB and flush out the damaged area supplied by userspace as a clip
2985 * rectangle list. Generic userspace which does frontbuffer rendering must call
2986 * this ioctl to flush out the changes on manual-update display outputs, e.g.
2987 * usb display-link, mipi manual update panels or edp panel self refresh modes.
2988 *
2989 * Modesetting drivers which always update the frontbuffer do not need to
2990 * implement the corresponding ->dirty framebuffer callback.
2991 *
2992 * Called by the user via ioctl.
2993 *
2994 * Returns:
2995 * Zero on success, errno on failure.
2996 */
2997int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
2998 void *data, struct drm_file *file_priv)
2999{
3000 struct drm_clip_rect __user *clips_ptr;
3001 struct drm_clip_rect *clips = NULL;
3002 struct drm_mode_fb_dirty_cmd *r = data;
3003 struct drm_framebuffer *fb;
3004 unsigned flags;
3005 int num_clips;
3006 int ret;
3007
3008 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3009 return -EINVAL;
3010
3011 fb = drm_framebuffer_lookup(dev, r->fb_id);
3012 if (!fb)
3013 return -ENOENT;
3014
3015 num_clips = r->num_clips;
3016 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
3017
3018 if (!num_clips != !clips_ptr) {
3019 ret = -EINVAL;
3020 goto out_err1;
3021 }
3022
3023 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
3024
3025 /* If userspace annotates copy, clips must come in pairs */
3026 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
3027 ret = -EINVAL;
3028 goto out_err1;
3029 }
3030
3031 if (num_clips && clips_ptr) {
3032 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
3033 ret = -EINVAL;
3034 goto out_err1;
3035 }
3036 clips = kzalloc(num_clips * sizeof(*clips), GFP_KERNEL);
3037 if (!clips) {
3038 ret = -ENOMEM;
3039 goto out_err1;
3040 }
3041
3042 ret = copy_from_user(clips, clips_ptr,
3043 num_clips * sizeof(*clips));
3044 if (ret) {
3045 ret = -EFAULT;
3046 goto out_err2;
3047 }
3048 }
3049
3050 if (fb->funcs->dirty) {
3051 ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
3052 clips, num_clips);
3053 } else {
3054 ret = -ENOSYS;
3055 }
3056
3057out_err2:
3058 kfree(clips);
3059out_err1:
3060 drm_framebuffer_unreference(fb);
3061
3062 return ret;
3063}
3064
3065
3066/**
3067 * drm_fb_release - remove and free the FBs on this file
3068 * @priv: drm file for the ioctl
3069 *
3070 * Destroy all the FBs associated with @filp.
3071 *
3072 * Called by the user via ioctl.
3073 *
3074 * Returns:
3075 * Zero on success, errno on failure.
3076 */
3077void drm_fb_release(struct drm_file *priv)
3078{
3079 struct drm_device *dev = priv->minor->dev;
3080 struct drm_framebuffer *fb, *tfb;
3081
3082 mutex_lock(&priv->fbs_lock);
3083 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
3084
3085 mutex_lock(&dev->mode_config.fb_lock);
3086 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
3087 __drm_framebuffer_unregister(dev, fb);
3088 mutex_unlock(&dev->mode_config.fb_lock);
3089
3090 list_del_init(&fb->filp_head);
3091
3092 /* This will also drop the fpriv->fbs reference. */
3093 drm_framebuffer_remove(fb);
3094 }
3095 mutex_unlock(&priv->fbs_lock);
3096}
3097
3098/**
3099 * drm_property_create - create a new property type
3100 * @dev: drm device
3101 * @flags: flags specifying the property type
3102 * @name: name of the property
3103 * @num_values: number of pre-defined values
3104 *
3105 * This creates a new generic drm property which can then be attached to a drm
3106 * object with drm_object_attach_property. The returned property object must be
3107 * freed with drm_property_destroy.
3108 *
3109 * Returns:
3110 * A pointer to the newly created property on success, NULL on failure.
3111 */
3112struct drm_property *drm_property_create(struct drm_device *dev, int flags,
3113 const char *name, int num_values)
3114{
3115 struct drm_property *property = NULL;
3116 int ret;
3117
3118 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
3119 if (!property)
3120 return NULL;
3121
3122 if (num_values) {
3123 property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL);
3124 if (!property->values)
3125 goto fail;
3126 }
3127
3128 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
3129 if (ret)
3130 goto fail;
3131
3132 property->flags = flags;
3133 property->num_values = num_values;
3134 INIT_LIST_HEAD(&property->enum_blob_list);
3135
3136 if (name) {
3137 strncpy(property->name, name, DRM_PROP_NAME_LEN);
3138 property->name[DRM_PROP_NAME_LEN-1] = '\0';
3139 }
3140
3141 list_add_tail(&property->head, &dev->mode_config.property_list);
3142 return property;
3143fail:
3144 kfree(property->values);
3145 kfree(property);
3146 return NULL;
3147}
3148EXPORT_SYMBOL(drm_property_create);
3149
3150/**
3151 * drm_property_create - create a new enumeration property type
3152 * @dev: drm device
3153 * @flags: flags specifying the property type
3154 * @name: name of the property
3155 * @props: enumeration lists with property values
3156 * @num_values: number of pre-defined values
3157 *
3158 * This creates a new generic drm property which can then be attached to a drm
3159 * object with drm_object_attach_property. The returned property object must be
3160 * freed with drm_property_destroy.
3161 *
3162 * Userspace is only allowed to set one of the predefined values for enumeration
3163 * properties.
3164 *
3165 * Returns:
3166 * A pointer to the newly created property on success, NULL on failure.
3167 */
3168struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
3169 const char *name,
3170 const struct drm_prop_enum_list *props,
3171 int num_values)
3172{
3173 struct drm_property *property;
3174 int i, ret;
3175
3176 flags |= DRM_MODE_PROP_ENUM;
3177
3178 property = drm_property_create(dev, flags, name, num_values);
3179 if (!property)
3180 return NULL;
3181
3182 for (i = 0; i < num_values; i++) {
3183 ret = drm_property_add_enum(property, i,
3184 props[i].type,
3185 props[i].name);
3186 if (ret) {
3187 drm_property_destroy(dev, property);
3188 return NULL;
3189 }
3190 }
3191
3192 return property;
3193}
3194EXPORT_SYMBOL(drm_property_create_enum);
3195
3196/**
3197 * drm_property_create - create a new bitmask property type
3198 * @dev: drm device
3199 * @flags: flags specifying the property type
3200 * @name: name of the property
3201 * @props: enumeration lists with property bitflags
3202 * @num_values: number of pre-defined values
3203 *
3204 * This creates a new generic drm property which can then be attached to a drm
3205 * object with drm_object_attach_property. The returned property object must be
3206 * freed with drm_property_destroy.
3207 *
3208 * Compared to plain enumeration properties userspace is allowed to set any
3209 * or'ed together combination of the predefined property bitflag values
3210 *
3211 * Returns:
3212 * A pointer to the newly created property on success, NULL on failure.
3213 */
3214struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
3215 int flags, const char *name,
3216 const struct drm_prop_enum_list *props,
3217 int num_values)
3218{
3219 struct drm_property *property;
3220 int i, ret;
3221
3222 flags |= DRM_MODE_PROP_BITMASK;
3223
3224 property = drm_property_create(dev, flags, name, num_values);
3225 if (!property)
3226 return NULL;
3227
3228 for (i = 0; i < num_values; i++) {
3229 ret = drm_property_add_enum(property, i,
3230 props[i].type,
3231 props[i].name);
3232 if (ret) {
3233 drm_property_destroy(dev, property);
3234 return NULL;
3235 }
3236 }
3237
3238 return property;
3239}
3240EXPORT_SYMBOL(drm_property_create_bitmask);
3241
3242/**
3243 * drm_property_create - create a new ranged property type
3244 * @dev: drm device
3245 * @flags: flags specifying the property type
3246 * @name: name of the property
3247 * @min: minimum value of the property
3248 * @max: maximum value of the property
3249 *
3250 * This creates a new generic drm property which can then be attached to a drm
3251 * object with drm_object_attach_property. The returned property object must be
3252 * freed with drm_property_destroy.
3253 *
3254 * Userspace is allowed to set any interger value in the (min, max) range
3255 * inclusive.
3256 *
3257 * Returns:
3258 * A pointer to the newly created property on success, NULL on failure.
3259 */
3260struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
3261 const char *name,
3262 uint64_t min, uint64_t max)
3263{
3264 struct drm_property *property;
3265
3266 flags |= DRM_MODE_PROP_RANGE;
3267
3268 property = drm_property_create(dev, flags, name, 2);
3269 if (!property)
3270 return NULL;
3271
3272 property->values[0] = min;
3273 property->values[1] = max;
3274
3275 return property;
3276}
3277EXPORT_SYMBOL(drm_property_create_range);
3278
3279/**
3280 * drm_property_add_enum - add a possible value to an enumeration property
3281 * @property: enumeration property to change
3282 * @index: index of the new enumeration
3283 * @value: value of the new enumeration
3284 * @name: symbolic name of the new enumeration
3285 *
3286 * This functions adds enumerations to a property.
3287 *
3288 * It's use is deprecated, drivers should use one of the more specific helpers
3289 * to directly create the property with all enumerations already attached.
3290 *
3291 * Returns:
3292 * Zero on success, error code on failure.
3293 */
3294int drm_property_add_enum(struct drm_property *property, int index,
3295 uint64_t value, const char *name)
3296{
3297 struct drm_property_enum *prop_enum;
3298
3299 if (!(property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)))
3300 return -EINVAL;
3301
3302 /*
3303 * Bitmask enum properties have the additional constraint of values
3304 * from 0 to 63
3305 */
3306 if ((property->flags & DRM_MODE_PROP_BITMASK) && (value > 63))
3307 return -EINVAL;
3308
3309 if (!list_empty(&property->enum_blob_list)) {
3310 list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
3311 if (prop_enum->value == value) {
3312 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3313 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3314 return 0;
3315 }
3316 }
3317 }
3318
3319 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
3320 if (!prop_enum)
3321 return -ENOMEM;
3322
3323 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3324 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3325 prop_enum->value = value;
3326
3327 property->values[index] = value;
3328 list_add_tail(&prop_enum->head, &property->enum_blob_list);
3329 return 0;
3330}
3331EXPORT_SYMBOL(drm_property_add_enum);
3332
3333/**
3334 * drm_property_destroy - destroy a drm property
3335 * @dev: drm device
3336 * @property: property to destry
3337 *
3338 * This function frees a property including any attached resources like
3339 * enumeration values.
3340 */
3341void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
3342{
3343 struct drm_property_enum *prop_enum, *pt;
3344
3345 list_for_each_entry_safe(prop_enum, pt, &property->enum_blob_list, head) {
3346 list_del(&prop_enum->head);
3347 kfree(prop_enum);
3348 }
3349
3350 if (property->num_values)
3351 kfree(property->values);
3352 drm_mode_object_put(dev, &property->base);
3353 list_del(&property->head);
3354 kfree(property);
3355}
3356EXPORT_SYMBOL(drm_property_destroy);
3357
3358/**
3359 * drm_object_attach_property - attach a property to a modeset object
3360 * @obj: drm modeset object
3361 * @property: property to attach
3362 * @init_val: initial value of the property
3363 *
3364 * This attaches the given property to the modeset object with the given initial
3365 * value. Currently this function cannot fail since the properties are stored in
3366 * a statically sized array.
3367 */
3368void drm_object_attach_property(struct drm_mode_object *obj,
3369 struct drm_property *property,
3370 uint64_t init_val)
3371{
3372 int count = obj->properties->count;
3373
3374 if (count == DRM_OBJECT_MAX_PROPERTY) {
3375 WARN(1, "Failed to attach object property (type: 0x%x). Please "
3376 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
3377 "you see this message on the same object type.\n",
3378 obj->type);
3379 return;
3380 }
3381
3382 obj->properties->ids[count] = property->base.id;
3383 obj->properties->values[count] = init_val;
3384 obj->properties->count++;
3385}
3386EXPORT_SYMBOL(drm_object_attach_property);
3387
3388/**
3389 * drm_object_property_set_value - set the value of a property
3390 * @obj: drm mode object to set property value for
3391 * @property: property to set
3392 * @val: value the property should be set to
3393 *
3394 * This functions sets a given property on a given object. This function only
3395 * changes the software state of the property, it does not call into the
3396 * driver's ->set_property callback.
3397 *
3398 * Returns:
3399 * Zero on success, error code on failure.
3400 */
3401int drm_object_property_set_value(struct drm_mode_object *obj,
3402 struct drm_property *property, uint64_t val)
3403{
3404 int i;
3405
3406 for (i = 0; i < obj->properties->count; i++) {
3407 if (obj->properties->ids[i] == property->base.id) {
3408 obj->properties->values[i] = val;
3409 return 0;
3410 }
3411 }
3412
3413 return -EINVAL;
3414}
3415EXPORT_SYMBOL(drm_object_property_set_value);
3416
3417/**
3418 * drm_object_property_get_value - retrieve the value of a property
3419 * @obj: drm mode object to get property value from
3420 * @property: property to retrieve
3421 * @val: storage for the property value
3422 *
3423 * This function retrieves the softare state of the given property for the given
3424 * property. Since there is no driver callback to retrieve the current property
3425 * value this might be out of sync with the hardware, depending upon the driver
3426 * and property.
3427 *
3428 * Returns:
3429 * Zero on success, error code on failure.
3430 */
3431int drm_object_property_get_value(struct drm_mode_object *obj,
3432 struct drm_property *property, uint64_t *val)
3433{
3434 int i;
3435
3436 for (i = 0; i < obj->properties->count; i++) {
3437 if (obj->properties->ids[i] == property->base.id) {
3438 *val = obj->properties->values[i];
3439 return 0;
3440 }
3441 }
3442
3443 return -EINVAL;
3444}
3445EXPORT_SYMBOL(drm_object_property_get_value);
3446
3447/**
3448 * drm_mode_getproperty_ioctl - get the current value of a connector's property
3449 * @dev: DRM device
3450 * @data: ioctl data
3451 * @file_priv: DRM file info
3452 *
3453 * This function retrieves the current value for an connectors's property.
3454 *
3455 * Called by the user via ioctl.
3456 *
3457 * Returns:
3458 * Zero on success, errno on failure.
3459 */
3460int drm_mode_getproperty_ioctl(struct drm_device *dev,
3461 void *data, struct drm_file *file_priv)
3462{
3463 struct drm_mode_object *obj;
3464 struct drm_mode_get_property *out_resp = data;
3465 struct drm_property *property;
3466 int enum_count = 0;
3467 int blob_count = 0;
3468 int value_count = 0;
3469 int ret = 0, i;
3470 int copied;
3471 struct drm_property_enum *prop_enum;
3472 struct drm_mode_property_enum __user *enum_ptr;
3473 struct drm_property_blob *prop_blob;
3474 uint32_t __user *blob_id_ptr;
3475 uint64_t __user *values_ptr;
3476 uint32_t __user *blob_length_ptr;
3477
3478 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3479 return -EINVAL;
3480
3481 drm_modeset_lock_all(dev);
3482 obj = drm_mode_object_find(dev, out_resp->prop_id, DRM_MODE_OBJECT_PROPERTY);
3483 if (!obj) {
3484 ret = -ENOENT;
3485 goto done;
3486 }
3487 property = obj_to_property(obj);
3488
3489 if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
3490 list_for_each_entry(prop_enum, &property->enum_blob_list, head)
3491 enum_count++;
3492 } else if (property->flags & DRM_MODE_PROP_BLOB) {
3493 list_for_each_entry(prop_blob, &property->enum_blob_list, head)
3494 blob_count++;
3495 }
3496
3497 value_count = property->num_values;
3498
3499 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
3500 out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
3501 out_resp->flags = property->flags;
3502
3503 if ((out_resp->count_values >= value_count) && value_count) {
3504 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
3505 for (i = 0; i < value_count; i++) {
3506 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
3507 ret = -EFAULT;
3508 goto done;
3509 }
3510 }
3511 }
3512 out_resp->count_values = value_count;
3513
3514 if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
3515 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
3516 copied = 0;
3517 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
3518 list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
3519
3520 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
3521 ret = -EFAULT;
3522 goto done;
3523 }
3524
3525 if (copy_to_user(&enum_ptr[copied].name,
3526 &prop_enum->name, DRM_PROP_NAME_LEN)) {
3527 ret = -EFAULT;
3528 goto done;
3529 }
3530 copied++;
3531 }
3532 }
3533 out_resp->count_enum_blobs = enum_count;
3534 }
3535
3536 if (property->flags & DRM_MODE_PROP_BLOB) {
3537 if ((out_resp->count_enum_blobs >= blob_count) && blob_count) {
3538 copied = 0;
3539 blob_id_ptr = (uint32_t __user *)(unsigned long)out_resp->enum_blob_ptr;
3540 blob_length_ptr = (uint32_t __user *)(unsigned long)out_resp->values_ptr;
3541
3542 list_for_each_entry(prop_blob, &property->enum_blob_list, head) {
3543 if (put_user(prop_blob->base.id, blob_id_ptr + copied)) {
3544 ret = -EFAULT;
3545 goto done;
3546 }
3547
3548 if (put_user(prop_blob->length, blob_length_ptr + copied)) {
3549 ret = -EFAULT;
3550 goto done;
3551 }
3552
3553 copied++;
3554 }
3555 }
3556 out_resp->count_enum_blobs = blob_count;
3557 }
3558done:
3559 drm_modeset_unlock_all(dev);
3560 return ret;
3561}
3562
3563static struct drm_property_blob *drm_property_create_blob(struct drm_device *dev, int length,
3564 void *data)
3565{
3566 struct drm_property_blob *blob;
3567 int ret;
3568
3569 if (!length || !data)
3570 return NULL;
3571
3572 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
3573 if (!blob)
3574 return NULL;
3575
3576 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
3577 if (ret) {
3578 kfree(blob);
3579 return NULL;
3580 }
3581
3582 blob->length = length;
3583
3584 memcpy(blob->data, data, length);
3585
3586 list_add_tail(&blob->head, &dev->mode_config.property_blob_list);
3587 return blob;
3588}
3589
3590static void drm_property_destroy_blob(struct drm_device *dev,
3591 struct drm_property_blob *blob)
3592{
3593 drm_mode_object_put(dev, &blob->base);
3594 list_del(&blob->head);
3595 kfree(blob);
3596}
3597
3598/**
3599 * drm_mode_getblob_ioctl - get the contents of a blob property value
3600 * @dev: DRM device
3601 * @data: ioctl data
3602 * @file_priv: DRM file info
3603 *
3604 * This function retrieves the contents of a blob property. The value stored in
3605 * an object's blob property is just a normal modeset object id.
3606 *
3607 * Called by the user via ioctl.
3608 *
3609 * Returns:
3610 * Zero on success, errno on failure.
3611 */
3612int drm_mode_getblob_ioctl(struct drm_device *dev,
3613 void *data, struct drm_file *file_priv)
3614{
3615 struct drm_mode_object *obj;
3616 struct drm_mode_get_blob *out_resp = data;
3617 struct drm_property_blob *blob;
3618 int ret = 0;
3619 void __user *blob_ptr;
3620
3621 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3622 return -EINVAL;
3623
3624 drm_modeset_lock_all(dev);
3625 obj = drm_mode_object_find(dev, out_resp->blob_id, DRM_MODE_OBJECT_BLOB);
3626 if (!obj) {
3627 ret = -ENOENT;
3628 goto done;
3629 }
3630 blob = obj_to_blob(obj);
3631
3632 if (out_resp->length == blob->length) {
3633 blob_ptr = (void __user *)(unsigned long)out_resp->data;
3634 if (copy_to_user(blob_ptr, blob->data, blob->length)){
3635 ret = -EFAULT;
3636 goto done;
3637 }
3638 }
3639 out_resp->length = blob->length;
3640
3641done:
3642 drm_modeset_unlock_all(dev);
3643 return ret;
3644}
3645
3646/**
3647 * drm_mode_connector_update_edid_property - update the edid property of a connector
3648 * @connector: drm connector
3649 * @edid: new value of the edid property
3650 *
3651 * This function creates a new blob modeset object and assigns its id to the
3652 * connector's edid property.
3653 *
3654 * Returns:
3655 * Zero on success, errno on failure.
3656 */
3657int drm_mode_connector_update_edid_property(struct drm_connector *connector,
3658 struct edid *edid)
3659{
3660 struct drm_device *dev = connector->dev;
3661 int ret, size;
3662
3663 if (connector->edid_blob_ptr)
3664 drm_property_destroy_blob(dev, connector->edid_blob_ptr);
3665
3666 /* Delete edid, when there is none. */
3667 if (!edid) {
3668 connector->edid_blob_ptr = NULL;
3669 ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0);
3670 return ret;
3671 }
3672
3673 size = EDID_LENGTH * (1 + edid->extensions);
3674 connector->edid_blob_ptr = drm_property_create_blob(connector->dev,
3675 size, edid);
3676 if (!connector->edid_blob_ptr)
3677 return -EINVAL;
3678
3679 ret = drm_object_property_set_value(&connector->base,
3680 dev->mode_config.edid_property,
3681 connector->edid_blob_ptr->base.id);
3682
3683 return ret;
3684}
3685EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
3686
3687static bool drm_property_change_is_valid(struct drm_property *property,
3688 uint64_t value)
3689{
3690 if (property->flags & DRM_MODE_PROP_IMMUTABLE)
3691 return false;
3692 if (property->flags & DRM_MODE_PROP_RANGE) {
3693 if (value < property->values[0] || value > property->values[1])
3694 return false;
3695 return true;
3696 } else if (property->flags & DRM_MODE_PROP_BITMASK) {
3697 int i;
3698 uint64_t valid_mask = 0;
3699 for (i = 0; i < property->num_values; i++)
3700 valid_mask |= (1ULL << property->values[i]);
3701 return !(value & ~valid_mask);
3702 } else if (property->flags & DRM_MODE_PROP_BLOB) {
3703 /* Only the driver knows */
3704 return true;
3705 } else {
3706 int i;
3707 for (i = 0; i < property->num_values; i++)
3708 if (property->values[i] == value)
3709 return true;
3710 return false;
3711 }
3712}
3713
3714/**
3715 * drm_mode_connector_property_set_ioctl - set the current value of a connector property
3716 * @dev: DRM device
3717 * @data: ioctl data
3718 * @file_priv: DRM file info
3719 *
3720 * This function sets the current value for a connectors's property. It also
3721 * calls into a driver's ->set_property callback to update the hardware state
3722 *
3723 * Called by the user via ioctl.
3724 *
3725 * Returns:
3726 * Zero on success, errno on failure.
3727 */
3728int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
3729 void *data, struct drm_file *file_priv)
3730{
3731 struct drm_mode_connector_set_property *conn_set_prop = data;
3732 struct drm_mode_obj_set_property obj_set_prop = {
3733 .value = conn_set_prop->value,
3734 .prop_id = conn_set_prop->prop_id,
3735 .obj_id = conn_set_prop->connector_id,
3736 .obj_type = DRM_MODE_OBJECT_CONNECTOR
3737 };
3738
3739 /* It does all the locking and checking we need */
3740 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
3741}
3742
3743static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
3744 struct drm_property *property,
3745 uint64_t value)
3746{
3747 int ret = -EINVAL;
3748 struct drm_connector *connector = obj_to_connector(obj);
3749
3750 /* Do DPMS ourselves */
3751 if (property == connector->dev->mode_config.dpms_property) {
3752 if (connector->funcs->dpms)
3753 (*connector->funcs->dpms)(connector, (int)value);
3754 ret = 0;
3755 } else if (connector->funcs->set_property)
3756 ret = connector->funcs->set_property(connector, property, value);
3757
3758 /* store the property value if successful */
3759 if (!ret)
3760 drm_object_property_set_value(&connector->base, property, value);
3761 return ret;
3762}
3763
3764static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
3765 struct drm_property *property,
3766 uint64_t value)
3767{
3768 int ret = -EINVAL;
3769 struct drm_crtc *crtc = obj_to_crtc(obj);
3770
3771 if (crtc->funcs->set_property)
3772 ret = crtc->funcs->set_property(crtc, property, value);
3773 if (!ret)
3774 drm_object_property_set_value(obj, property, value);
3775
3776 return ret;
3777}
3778
3779static int drm_mode_plane_set_obj_prop(struct drm_mode_object *obj,
3780 struct drm_property *property,
3781 uint64_t value)
3782{
3783 int ret = -EINVAL;
3784 struct drm_plane *plane = obj_to_plane(obj);
3785
3786 if (plane->funcs->set_property)
3787 ret = plane->funcs->set_property(plane, property, value);
3788 if (!ret)
3789 drm_object_property_set_value(obj, property, value);
3790
3791 return ret;
3792}
3793
3794/**
3795 * drm_mode_getproperty_ioctl - get the current value of a object's property
3796 * @dev: DRM device
3797 * @data: ioctl data
3798 * @file_priv: DRM file info
3799 *
3800 * This function retrieves the current value for an object's property. Compared
3801 * to the connector specific ioctl this one is extended to also work on crtc and
3802 * plane objects.
3803 *
3804 * Called by the user via ioctl.
3805 *
3806 * Returns:
3807 * Zero on success, errno on failure.
3808 */
3809int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
3810 struct drm_file *file_priv)
3811{
3812 struct drm_mode_obj_get_properties *arg = data;
3813 struct drm_mode_object *obj;
3814 int ret = 0;
3815 int i;
3816 int copied = 0;
3817 int props_count = 0;
3818 uint32_t __user *props_ptr;
3819 uint64_t __user *prop_values_ptr;
3820
3821 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3822 return -EINVAL;
3823
3824 drm_modeset_lock_all(dev);
3825
3826 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
3827 if (!obj) {
3828 ret = -ENOENT;
3829 goto out;
3830 }
3831 if (!obj->properties) {
3832 ret = -EINVAL;
3833 goto out;
3834 }
3835
3836 props_count = obj->properties->count;
3837
3838 /* This ioctl is called twice, once to determine how much space is
3839 * needed, and the 2nd time to fill it. */
3840 if ((arg->count_props >= props_count) && props_count) {
3841 copied = 0;
3842 props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
3843 prop_values_ptr = (uint64_t __user *)(unsigned long)
3844 (arg->prop_values_ptr);
3845 for (i = 0; i < props_count; i++) {
3846 if (put_user(obj->properties->ids[i],
3847 props_ptr + copied)) {
3848 ret = -EFAULT;
3849 goto out;
3850 }
3851 if (put_user(obj->properties->values[i],
3852 prop_values_ptr + copied)) {
3853 ret = -EFAULT;
3854 goto out;
3855 }
3856 copied++;
3857 }
3858 }
3859 arg->count_props = props_count;
3860out:
3861 drm_modeset_unlock_all(dev);
3862 return ret;
3863}
3864
3865/**
3866 * drm_mode_obj_set_property_ioctl - set the current value of an object's property
3867 * @dev: DRM device
3868 * @data: ioctl data
3869 * @file_priv: DRM file info
3870 *
3871 * This function sets the current value for an object's property. It also calls
3872 * into a driver's ->set_property callback to update the hardware state.
3873 * Compared to the connector specific ioctl this one is extended to also work on
3874 * crtc and plane objects.
3875 *
3876 * Called by the user via ioctl.
3877 *
3878 * Returns:
3879 * Zero on success, errno on failure.
3880 */
3881int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
3882 struct drm_file *file_priv)
3883{
3884 struct drm_mode_obj_set_property *arg = data;
3885 struct drm_mode_object *arg_obj;
3886 struct drm_mode_object *prop_obj;
3887 struct drm_property *property;
3888 int ret = -EINVAL;
3889 int i;
3890
3891 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3892 return -EINVAL;
3893
3894 drm_modeset_lock_all(dev);
3895
3896 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
3897 if (!arg_obj) {
3898 ret = -ENOENT;
3899 goto out;
3900 }
3901 if (!arg_obj->properties)
3902 goto out;
3903
3904 for (i = 0; i < arg_obj->properties->count; i++)
3905 if (arg_obj->properties->ids[i] == arg->prop_id)
3906 break;
3907
3908 if (i == arg_obj->properties->count)
3909 goto out;
3910
3911 prop_obj = drm_mode_object_find(dev, arg->prop_id,
3912 DRM_MODE_OBJECT_PROPERTY);
3913 if (!prop_obj) {
3914 ret = -ENOENT;
3915 goto out;
3916 }
3917 property = obj_to_property(prop_obj);
3918
3919 if (!drm_property_change_is_valid(property, arg->value))
3920 goto out;
3921
3922 switch (arg_obj->type) {
3923 case DRM_MODE_OBJECT_CONNECTOR:
3924 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
3925 arg->value);
3926 break;
3927 case DRM_MODE_OBJECT_CRTC:
3928 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
3929 break;
3930 case DRM_MODE_OBJECT_PLANE:
3931 ret = drm_mode_plane_set_obj_prop(arg_obj, property, arg->value);
3932 break;
3933 }
3934
3935out:
3936 drm_modeset_unlock_all(dev);
3937 return ret;
3938}
3939
3940/**
3941 * drm_mode_connector_attach_encoder - attach a connector to an encoder
3942 * @connector: connector to attach
3943 * @encoder: encoder to attach @connector to
3944 *
3945 * This function links up a connector to an encoder. Note that the routing
3946 * restrictions between encoders and crtcs are exposed to userspace through the
3947 * possible_clones and possible_crtcs bitmasks.
3948 *
3949 * Returns:
3950 * Zero on success, errno on failure.
3951 */
3952int drm_mode_connector_attach_encoder(struct drm_connector *connector,
3953 struct drm_encoder *encoder)
3954{
3955 int i;
3956
3957 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
3958 if (connector->encoder_ids[i] == 0) {
3959 connector->encoder_ids[i] = encoder->base.id;
3960 return 0;
3961 }
3962 }
3963 return -ENOMEM;
3964}
3965EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
3966
3967/**
3968 * drm_mode_crtc_set_gamma_size - set the gamma table size
3969 * @crtc: CRTC to set the gamma table size for
3970 * @gamma_size: size of the gamma table
3971 *
3972 * Drivers which support gamma tables should set this to the supported gamma
3973 * table size when initializing the CRTC. Currently the drm core only supports a
3974 * fixed gamma table size.
3975 *
3976 * Returns:
3977 * Zero on success, errno on failure.
3978 */
3979int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
3980 int gamma_size)
3981{
3982 crtc->gamma_size = gamma_size;
3983
3984 crtc->gamma_store = kzalloc(gamma_size * sizeof(uint16_t) * 3, GFP_KERNEL);
3985 if (!crtc->gamma_store) {
3986 crtc->gamma_size = 0;
3987 return -ENOMEM;
3988 }
3989
3990 return 0;
3991}
3992EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
3993
3994/**
3995 * drm_mode_gamma_set_ioctl - set the gamma table
3996 * @dev: DRM device
3997 * @data: ioctl data
3998 * @file_priv: DRM file info
3999 *
4000 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can
4001 * inquire the required gamma table size through drm_mode_gamma_get_ioctl.
4002 *
4003 * Called by the user via ioctl.
4004 *
4005 * Returns:
4006 * Zero on success, errno on failure.
4007 */
4008int drm_mode_gamma_set_ioctl(struct drm_device *dev,
4009 void *data, struct drm_file *file_priv)
4010{
4011 struct drm_mode_crtc_lut *crtc_lut = data;
4012 struct drm_mode_object *obj;
4013 struct drm_crtc *crtc;
4014 void *r_base, *g_base, *b_base;
4015 int size;
4016 int ret = 0;
4017
4018 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4019 return -EINVAL;
4020
4021 drm_modeset_lock_all(dev);
4022 obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
4023 if (!obj) {
4024 ret = -ENOENT;
4025 goto out;
4026 }
4027 crtc = obj_to_crtc(obj);
4028
4029 if (crtc->funcs->gamma_set == NULL) {
4030 ret = -ENOSYS;
4031 goto out;
4032 }
4033
4034 /* memcpy into gamma store */
4035 if (crtc_lut->gamma_size != crtc->gamma_size) {
4036 ret = -EINVAL;
4037 goto out;
4038 }
4039
4040 size = crtc_lut->gamma_size * (sizeof(uint16_t));
4041 r_base = crtc->gamma_store;
4042 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
4043 ret = -EFAULT;
4044 goto out;
4045 }
4046
4047 g_base = (char *)r_base + size;
4048 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
4049 ret = -EFAULT;
4050 goto out;
4051 }
4052
4053 b_base = (char *)g_base + size;
4054 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
4055 ret = -EFAULT;
4056 goto out;
4057 }
4058
4059 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
4060
4061out:
4062 drm_modeset_unlock_all(dev);
4063 return ret;
4064
4065}
4066
4067/**
4068 * drm_mode_gamma_get_ioctl - get the gamma table
4069 * @dev: DRM device
4070 * @data: ioctl data
4071 * @file_priv: DRM file info
4072 *
4073 * Copy the current gamma table into the storage provided. This also provides
4074 * the gamma table size the driver expects, which can be used to size the
4075 * allocated storage.
4076 *
4077 * Called by the user via ioctl.
4078 *
4079 * Returns:
4080 * Zero on success, errno on failure.
4081 */
4082int drm_mode_gamma_get_ioctl(struct drm_device *dev,
4083 void *data, struct drm_file *file_priv)
4084{
4085 struct drm_mode_crtc_lut *crtc_lut = data;
4086 struct drm_mode_object *obj;
4087 struct drm_crtc *crtc;
4088 void *r_base, *g_base, *b_base;
4089 int size;
4090 int ret = 0;
4091
4092 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4093 return -EINVAL;
4094
4095 drm_modeset_lock_all(dev);
4096 obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
4097 if (!obj) {
4098 ret = -ENOENT;
4099 goto out;
4100 }
4101 crtc = obj_to_crtc(obj);
4102
4103 /* memcpy into gamma store */
4104 if (crtc_lut->gamma_size != crtc->gamma_size) {
4105 ret = -EINVAL;
4106 goto out;
4107 }
4108
4109 size = crtc_lut->gamma_size * (sizeof(uint16_t));
4110 r_base = crtc->gamma_store;
4111 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
4112 ret = -EFAULT;
4113 goto out;
4114 }
4115
4116 g_base = (char *)r_base + size;
4117 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
4118 ret = -EFAULT;
4119 goto out;
4120 }
4121
4122 b_base = (char *)g_base + size;
4123 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
4124 ret = -EFAULT;
4125 goto out;
4126 }
4127out:
4128 drm_modeset_unlock_all(dev);
4129 return ret;
4130}
4131
4132/**
4133 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update
4134 * @dev: DRM device
4135 * @data: ioctl data
4136 * @file_priv: DRM file info
4137 *
4138 * This schedules an asynchronous update on a given CRTC, called page flip.
4139 * Optionally a drm event is generated to signal the completion of the event.
4140 * Generic drivers cannot assume that a pageflip with changed framebuffer
4141 * properties (including driver specific metadata like tiling layout) will work,
4142 * but some drivers support e.g. pixel format changes through the pageflip
4143 * ioctl.
4144 *
4145 * Called by the user via ioctl.
4146 *
4147 * Returns:
4148 * Zero on success, errno on failure.
4149 */
4150int drm_mode_page_flip_ioctl(struct drm_device *dev,
4151 void *data, struct drm_file *file_priv)
4152{
4153 struct drm_mode_crtc_page_flip *page_flip = data;
4154 struct drm_mode_object *obj;
4155 struct drm_crtc *crtc;
4156 struct drm_framebuffer *fb = NULL, *old_fb = NULL;
4157 struct drm_pending_vblank_event *e = NULL;
4158 unsigned long flags;
4159 int ret = -EINVAL;
4160
4161 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
4162 page_flip->reserved != 0)
4163 return -EINVAL;
4164
4165 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
4166 return -EINVAL;
4167
4168 obj = drm_mode_object_find(dev, page_flip->crtc_id, DRM_MODE_OBJECT_CRTC);
4169 if (!obj)
4170 return -ENOENT;
4171 crtc = obj_to_crtc(obj);
4172
4173 mutex_lock(&crtc->mutex);
4174 if (crtc->primary->fb == NULL) {
4175 /* The framebuffer is currently unbound, presumably
4176 * due to a hotplug event, that userspace has not
4177 * yet discovered.
4178 */
4179 ret = -EBUSY;
4180 goto out;
4181 }
4182
4183 if (crtc->funcs->page_flip == NULL)
4184 goto out;
4185
4186 fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
4187 if (!fb) {
4188 ret = -ENOENT;
4189 goto out;
4190 }
4191
4192 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb);
4193 if (ret)
4194 goto out;
4195
4196 if (crtc->primary->fb->pixel_format != fb->pixel_format) {
4197 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
4198 ret = -EINVAL;
4199 goto out;
4200 }
4201
4202 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
4203 ret = -ENOMEM;
4204 spin_lock_irqsave(&dev->event_lock, flags);
4205 if (file_priv->event_space < sizeof e->event) {
4206 spin_unlock_irqrestore(&dev->event_lock, flags);
4207 goto out;
4208 }
4209 file_priv->event_space -= sizeof e->event;
4210 spin_unlock_irqrestore(&dev->event_lock, flags);
4211
4212 e = kzalloc(sizeof *e, GFP_KERNEL);
4213 if (e == NULL) {
4214 spin_lock_irqsave(&dev->event_lock, flags);
4215 file_priv->event_space += sizeof e->event;
4216 spin_unlock_irqrestore(&dev->event_lock, flags);
4217 goto out;
4218 }
4219
4220 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
4221 e->event.base.length = sizeof e->event;
4222 e->event.user_data = page_flip->user_data;
4223 e->base.event = &e->event.base;
4224 e->base.file_priv = file_priv;
4225 e->base.destroy =
4226 (void (*) (struct drm_pending_event *)) kfree;
4227 }
4228
4229 old_fb = crtc->primary->fb;
4230 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags);
4231 if (ret) {
4232 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
4233 spin_lock_irqsave(&dev->event_lock, flags);
4234 file_priv->event_space += sizeof e->event;
4235 spin_unlock_irqrestore(&dev->event_lock, flags);
4236 kfree(e);
4237 }
4238 /* Keep the old fb, don't unref it. */
4239 old_fb = NULL;
4240 } else {
4241 /*
4242 * Warn if the driver hasn't properly updated the crtc->fb
4243 * field to reflect that the new framebuffer is now used.
4244 * Failing to do so will screw with the reference counting
4245 * on framebuffers.
4246 */
4247 WARN_ON(crtc->primary->fb != fb);
4248 /* Unref only the old framebuffer. */
4249 fb = NULL;
4250 }
4251
4252out:
4253 if (fb)
4254 drm_framebuffer_unreference(fb);
4255 if (old_fb)
4256 drm_framebuffer_unreference(old_fb);
4257 mutex_unlock(&crtc->mutex);
4258
4259 return ret;
4260}
4261
4262/**
4263 * drm_mode_config_reset - call ->reset callbacks
4264 * @dev: drm device
4265 *
4266 * This functions calls all the crtc's, encoder's and connector's ->reset
4267 * callback. Drivers can use this in e.g. their driver load or resume code to
4268 * reset hardware and software state.
4269 */
4270void drm_mode_config_reset(struct drm_device *dev)
4271{
4272 struct drm_crtc *crtc;
4273 struct drm_encoder *encoder;
4274 struct drm_connector *connector;
4275
4276 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
4277 if (crtc->funcs->reset)
4278 crtc->funcs->reset(crtc);
4279
4280 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
4281 if (encoder->funcs->reset)
4282 encoder->funcs->reset(encoder);
4283
4284 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
4285 connector->status = connector_status_unknown;
4286
4287 if (connector->funcs->reset)
4288 connector->funcs->reset(connector);
4289 }
4290}
4291EXPORT_SYMBOL(drm_mode_config_reset);
4292
4293/**
4294 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer
4295 * @dev: DRM device
4296 * @data: ioctl data
4297 * @file_priv: DRM file info
4298 *
4299 * This creates a new dumb buffer in the driver's backing storage manager (GEM,
4300 * TTM or something else entirely) and returns the resulting buffer handle. This
4301 * handle can then be wrapped up into a framebuffer modeset object.
4302 *
4303 * Note that userspace is not allowed to use such objects for render
4304 * acceleration - drivers must create their own private ioctls for such a use
4305 * case.
4306 *
4307 * Called by the user via ioctl.
4308 *
4309 * Returns:
4310 * Zero on success, errno on failure.
4311 */
4312int drm_mode_create_dumb_ioctl(struct drm_device *dev,
4313 void *data, struct drm_file *file_priv)
4314{
4315 struct drm_mode_create_dumb *args = data;
4316 u32 cpp, stride, size;
4317
4318 if (!dev->driver->dumb_create)
4319 return -ENOSYS;
4320 if (!args->width || !args->height || !args->bpp)
4321 return -EINVAL;
4322
4323 /* overflow checks for 32bit size calculations */
4324 cpp = DIV_ROUND_UP(args->bpp, 8);
4325 if (cpp > 0xffffffffU / args->width)
4326 return -EINVAL;
4327 stride = cpp * args->width;
4328 if (args->height > 0xffffffffU / stride)
4329 return -EINVAL;
4330
4331 /* test for wrap-around */
4332 size = args->height * stride;
4333 if (PAGE_ALIGN(size) == 0)
4334 return -EINVAL;
4335
4336 return dev->driver->dumb_create(file_priv, dev, args);
4337}
4338
4339/**
4340 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer
4341 * @dev: DRM device
4342 * @data: ioctl data
4343 * @file_priv: DRM file info
4344 *
4345 * Allocate an offset in the drm device node's address space to be able to
4346 * memory map a dumb buffer.
4347 *
4348 * Called by the user via ioctl.
4349 *
4350 * Returns:
4351 * Zero on success, errno on failure.
4352 */
4353int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
4354 void *data, struct drm_file *file_priv)
4355{
4356 struct drm_mode_map_dumb *args = data;
4357
4358 /* call driver ioctl to get mmap offset */
4359 if (!dev->driver->dumb_map_offset)
4360 return -ENOSYS;
4361
4362 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
4363}
4364
4365/**
4366 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer
4367 * @dev: DRM device
4368 * @data: ioctl data
4369 * @file_priv: DRM file info
4370 *
4371 * This destroys the userspace handle for the given dumb backing storage buffer.
4372 * Since buffer objects must be reference counted in the kernel a buffer object
4373 * won't be immediately freed if a framebuffer modeset object still uses it.
4374 *
4375 * Called by the user via ioctl.
4376 *
4377 * Returns:
4378 * Zero on success, errno on failure.
4379 */
4380int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
4381 void *data, struct drm_file *file_priv)
4382{
4383 struct drm_mode_destroy_dumb *args = data;
4384
4385 if (!dev->driver->dumb_destroy)
4386 return -ENOSYS;
4387
4388 return dev->driver->dumb_destroy(file_priv, dev, args->handle);
4389}
4390
4391/**
4392 * drm_fb_get_bpp_depth - get the bpp/depth values for format
4393 * @format: pixel format (DRM_FORMAT_*)
4394 * @depth: storage for the depth value
4395 * @bpp: storage for the bpp value
4396 *
4397 * This only supports RGB formats here for compat with code that doesn't use
4398 * pixel formats directly yet.
4399 */
4400void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
4401 int *bpp)
4402{
4403 switch (format) {
4404 case DRM_FORMAT_C8:
4405 case DRM_FORMAT_RGB332:
4406 case DRM_FORMAT_BGR233:
4407 *depth = 8;
4408 *bpp = 8;
4409 break;
4410 case DRM_FORMAT_XRGB1555:
4411 case DRM_FORMAT_XBGR1555:
4412 case DRM_FORMAT_RGBX5551:
4413 case DRM_FORMAT_BGRX5551:
4414 case DRM_FORMAT_ARGB1555:
4415 case DRM_FORMAT_ABGR1555:
4416 case DRM_FORMAT_RGBA5551:
4417 case DRM_FORMAT_BGRA5551:
4418 *depth = 15;
4419 *bpp = 16;
4420 break;
4421 case DRM_FORMAT_RGB565:
4422 case DRM_FORMAT_BGR565:
4423 *depth = 16;
4424 *bpp = 16;
4425 break;
4426 case DRM_FORMAT_RGB888:
4427 case DRM_FORMAT_BGR888:
4428 *depth = 24;
4429 *bpp = 24;
4430 break;
4431 case DRM_FORMAT_XRGB8888:
4432 case DRM_FORMAT_XBGR8888:
4433 case DRM_FORMAT_RGBX8888:
4434 case DRM_FORMAT_BGRX8888:
4435 *depth = 24;
4436 *bpp = 32;
4437 break;
4438 case DRM_FORMAT_XRGB2101010:
4439 case DRM_FORMAT_XBGR2101010:
4440 case DRM_FORMAT_RGBX1010102:
4441 case DRM_FORMAT_BGRX1010102:
4442 case DRM_FORMAT_ARGB2101010:
4443 case DRM_FORMAT_ABGR2101010:
4444 case DRM_FORMAT_RGBA1010102:
4445 case DRM_FORMAT_BGRA1010102:
4446 *depth = 30;
4447 *bpp = 32;
4448 break;
4449 case DRM_FORMAT_ARGB8888:
4450 case DRM_FORMAT_ABGR8888:
4451 case DRM_FORMAT_RGBA8888:
4452 case DRM_FORMAT_BGRA8888:
4453 *depth = 32;
4454 *bpp = 32;
4455 break;
4456 default:
4457 DRM_DEBUG_KMS("unsupported pixel format %s\n",
4458 drm_get_format_name(format));
4459 *depth = 0;
4460 *bpp = 0;
4461 break;
4462 }
4463}
4464EXPORT_SYMBOL(drm_fb_get_bpp_depth);
4465
4466/**
4467 * drm_format_num_planes - get the number of planes for format
4468 * @format: pixel format (DRM_FORMAT_*)
4469 *
4470 * Returns:
4471 * The number of planes used by the specified pixel format.
4472 */
4473int drm_format_num_planes(uint32_t format)
4474{
4475 switch (format) {
4476 case DRM_FORMAT_YUV410:
4477 case DRM_FORMAT_YVU410:
4478 case DRM_FORMAT_YUV411:
4479 case DRM_FORMAT_YVU411:
4480 case DRM_FORMAT_YUV420:
4481 case DRM_FORMAT_YVU420:
4482 case DRM_FORMAT_YUV422:
4483 case DRM_FORMAT_YVU422:
4484 case DRM_FORMAT_YUV444:
4485 case DRM_FORMAT_YVU444:
4486 return 3;
4487 case DRM_FORMAT_NV12:
4488 case DRM_FORMAT_NV21:
4489 case DRM_FORMAT_NV16:
4490 case DRM_FORMAT_NV61:
4491 case DRM_FORMAT_NV24:
4492 case DRM_FORMAT_NV42:
4493 return 2;
4494 default:
4495 return 1;
4496 }
4497}
4498EXPORT_SYMBOL(drm_format_num_planes);
4499
4500/**
4501 * drm_format_plane_cpp - determine the bytes per pixel value
4502 * @format: pixel format (DRM_FORMAT_*)
4503 * @plane: plane index
4504 *
4505 * Returns:
4506 * The bytes per pixel value for the specified plane.
4507 */
4508int drm_format_plane_cpp(uint32_t format, int plane)
4509{
4510 unsigned int depth;
4511 int bpp;
4512
4513 if (plane >= drm_format_num_planes(format))
4514 return 0;
4515
4516 switch (format) {
4517 case DRM_FORMAT_YUYV:
4518 case DRM_FORMAT_YVYU:
4519 case DRM_FORMAT_UYVY:
4520 case DRM_FORMAT_VYUY:
4521 return 2;
4522 case DRM_FORMAT_NV12:
4523 case DRM_FORMAT_NV21:
4524 case DRM_FORMAT_NV16:
4525 case DRM_FORMAT_NV61:
4526 case DRM_FORMAT_NV24:
4527 case DRM_FORMAT_NV42:
4528 return plane ? 2 : 1;
4529 case DRM_FORMAT_YUV410:
4530 case DRM_FORMAT_YVU410:
4531 case DRM_FORMAT_YUV411:
4532 case DRM_FORMAT_YVU411:
4533 case DRM_FORMAT_YUV420:
4534 case DRM_FORMAT_YVU420:
4535 case DRM_FORMAT_YUV422:
4536 case DRM_FORMAT_YVU422:
4537 case DRM_FORMAT_YUV444:
4538 case DRM_FORMAT_YVU444:
4539 return 1;
4540 default:
4541 drm_fb_get_bpp_depth(format, &depth, &bpp);
4542 return bpp >> 3;
4543 }
4544}
4545EXPORT_SYMBOL(drm_format_plane_cpp);
4546
4547/**
4548 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
4549 * @format: pixel format (DRM_FORMAT_*)
4550 *
4551 * Returns:
4552 * The horizontal chroma subsampling factor for the
4553 * specified pixel format.
4554 */
4555int drm_format_horz_chroma_subsampling(uint32_t format)
4556{
4557 switch (format) {
4558 case DRM_FORMAT_YUV411:
4559 case DRM_FORMAT_YVU411:
4560 case DRM_FORMAT_YUV410:
4561 case DRM_FORMAT_YVU410:
4562 return 4;
4563 case DRM_FORMAT_YUYV:
4564 case DRM_FORMAT_YVYU:
4565 case DRM_FORMAT_UYVY:
4566 case DRM_FORMAT_VYUY:
4567 case DRM_FORMAT_NV12:
4568 case DRM_FORMAT_NV21:
4569 case DRM_FORMAT_NV16:
4570 case DRM_FORMAT_NV61:
4571 case DRM_FORMAT_YUV422:
4572 case DRM_FORMAT_YVU422:
4573 case DRM_FORMAT_YUV420:
4574 case DRM_FORMAT_YVU420:
4575 return 2;
4576 default:
4577 return 1;
4578 }
4579}
4580EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
4581
4582/**
4583 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
4584 * @format: pixel format (DRM_FORMAT_*)
4585 *
4586 * Returns:
4587 * The vertical chroma subsampling factor for the
4588 * specified pixel format.
4589 */
4590int drm_format_vert_chroma_subsampling(uint32_t format)
4591{
4592 switch (format) {
4593 case DRM_FORMAT_YUV410:
4594 case DRM_FORMAT_YVU410:
4595 return 4;
4596 case DRM_FORMAT_YUV420:
4597 case DRM_FORMAT_YVU420:
4598 case DRM_FORMAT_NV12:
4599 case DRM_FORMAT_NV21:
4600 return 2;
4601 default:
4602 return 1;
4603 }
4604}
4605EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
4606
4607/**
4608 * drm_mode_config_init - initialize DRM mode_configuration structure
4609 * @dev: DRM device
4610 *
4611 * Initialize @dev's mode_config structure, used for tracking the graphics
4612 * configuration of @dev.
4613 *
4614 * Since this initializes the modeset locks, no locking is possible. Which is no
4615 * problem, since this should happen single threaded at init time. It is the
4616 * driver's problem to ensure this guarantee.
4617 *
4618 */
4619void drm_mode_config_init(struct drm_device *dev)
4620{
4621#ifdef __NetBSD__
4622 linux_mutex_init(&dev->mode_config.mutex);
4623 linux_mutex_init(&dev->mode_config.idr_mutex);
4624 linux_mutex_init(&dev->mode_config.fb_lock);
4625#else
4626 mutex_init(&dev->mode_config.mutex);
4627 mutex_init(&dev->mode_config.idr_mutex);
4628 mutex_init(&dev->mode_config.fb_lock);
4629#endif
4630 INIT_LIST_HEAD(&dev->mode_config.fb_list);
4631 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
4632 INIT_LIST_HEAD(&dev->mode_config.connector_list);
4633 INIT_LIST_HEAD(&dev->mode_config.bridge_list);
4634 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
4635 INIT_LIST_HEAD(&dev->mode_config.property_list);
4636 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
4637 INIT_LIST_HEAD(&dev->mode_config.plane_list);
4638 idr_init(&dev->mode_config.crtc_idr);
4639
4640 drm_modeset_lock_all(dev);
4641 drm_mode_create_standard_connector_properties(dev);
4642 drm_mode_create_standard_plane_properties(dev);
4643 drm_modeset_unlock_all(dev);
4644
4645 /* Just to be sure */
4646 dev->mode_config.num_fb = 0;
4647 dev->mode_config.num_connector = 0;
4648 dev->mode_config.num_crtc = 0;
4649 dev->mode_config.num_encoder = 0;
4650 dev->mode_config.num_overlay_plane = 0;
4651 dev->mode_config.num_total_plane = 0;
4652}
4653EXPORT_SYMBOL(drm_mode_config_init);
4654
4655/**
4656 * drm_mode_config_cleanup - free up DRM mode_config info
4657 * @dev: DRM device
4658 *
4659 * Free up all the connectors and CRTCs associated with this DRM device, then
4660 * free up the framebuffers and associated buffer objects.
4661 *
4662 * Note that since this /should/ happen single-threaded at driver/device
4663 * teardown time, no locking is required. It's the driver's job to ensure that
4664 * this guarantee actually holds true.
4665 *
4666 * FIXME: cleanup any dangling user buffer objects too
4667 */
4668void drm_mode_config_cleanup(struct drm_device *dev)
4669{
4670 struct drm_connector *connector, *ot;
4671 struct drm_crtc *crtc, *ct;
4672 struct drm_encoder *encoder, *enct;
4673 struct drm_bridge *bridge, *brt;
4674 struct drm_framebuffer *fb, *fbt;
4675 struct drm_property *property, *pt;
4676 struct drm_property_blob *blob, *bt;
4677 struct drm_plane *plane, *plt;
4678
4679 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
4680 head) {
4681 encoder->funcs->destroy(encoder);
4682 }
4683
4684 list_for_each_entry_safe(bridge, brt,
4685 &dev->mode_config.bridge_list, head) {
4686 bridge->funcs->destroy(bridge);
4687 }
4688
4689 list_for_each_entry_safe(connector, ot,
4690 &dev->mode_config.connector_list, head) {
4691 connector->funcs->destroy(connector);
4692 }
4693
4694 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
4695 head) {
4696 drm_property_destroy(dev, property);
4697 }
4698
4699 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
4700 head) {
4701 drm_property_destroy_blob(dev, blob);
4702 }
4703
4704 /*
4705 * Single-threaded teardown context, so it's not required to grab the
4706 * fb_lock to protect against concurrent fb_list access. Contrary, it
4707 * would actually deadlock with the drm_framebuffer_cleanup function.
4708 *
4709 * Also, if there are any framebuffers left, that's a driver leak now,
4710 * so politely WARN about this.
4711 */
4712 WARN_ON(!list_empty(&dev->mode_config.fb_list));
4713 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
4714 drm_framebuffer_remove(fb);
4715 }
4716
4717 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
4718 head) {
4719 plane->funcs->destroy(plane);
4720 }
4721
4722 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
4723 crtc->funcs->destroy(crtc);
4724 }
4725
4726 idr_destroy(&dev->mode_config.crtc_idr);
4727
4728#ifdef __NetBSD__
4729 linux_mutex_init(&dev->mode_config.fb_lock);
4730 linux_mutex_init(&dev->mode_config.idr_mutex);
4731 linux_mutex_init(&dev->mode_config.mutex);
4732#endif
4733}
4734EXPORT_SYMBOL(drm_mode_config_cleanup);
4735