Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
[sfrench/cifs-2.6.git] / drivers / gpu / drm / drm_crtc.c
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/list.h>
33 #include "drm.h"
34 #include "drmP.h"
35 #include "drm_crtc.h"
36
37 struct drm_prop_enum_list {
38         int type;
39         char *name;
40 };
41
42 /* Avoid boilerplate.  I'm tired of typing. */
43 #define DRM_ENUM_NAME_FN(fnname, list)                          \
44         char *fnname(int val)                                   \
45         {                                                       \
46                 int i;                                          \
47                 for (i = 0; i < ARRAY_SIZE(list); i++) {        \
48                         if (list[i].type == val)                \
49                                 return list[i].name;            \
50                 }                                               \
51                 return "(unknown)";                             \
52         }
53
54 /*
55  * Global properties
56  */
57 static struct drm_prop_enum_list drm_dpms_enum_list[] =
58 {       { DRM_MODE_DPMS_ON, "On" },
59         { DRM_MODE_DPMS_STANDBY, "Standby" },
60         { DRM_MODE_DPMS_SUSPEND, "Suspend" },
61         { DRM_MODE_DPMS_OFF, "Off" }
62 };
63
64 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
65
66 /*
67  * Optional properties
68  */
69 static struct drm_prop_enum_list drm_scaling_mode_enum_list[] =
70 {
71         { DRM_MODE_SCALE_NONE, "None" },
72         { DRM_MODE_SCALE_FULLSCREEN, "Full" },
73         { DRM_MODE_SCALE_CENTER, "Center" },
74         { DRM_MODE_SCALE_ASPECT, "Full aspect" },
75 };
76
77 static struct drm_prop_enum_list drm_dithering_mode_enum_list[] =
78 {
79         { DRM_MODE_DITHERING_OFF, "Off" },
80         { DRM_MODE_DITHERING_ON, "On" },
81 };
82
83 /*
84  * Non-global properties, but "required" for certain connectors.
85  */
86 static struct drm_prop_enum_list drm_dvi_i_select_enum_list[] =
87 {
88         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
89         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
90         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
91 };
92
93 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
94
95 static struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] =
96 {
97         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
98         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
99         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
100 };
101
102 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
103                  drm_dvi_i_subconnector_enum_list)
104
105 static struct drm_prop_enum_list drm_tv_select_enum_list[] =
106 {
107         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
108         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
109         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
110         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
111         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
112 };
113
114 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
115
116 static struct drm_prop_enum_list drm_tv_subconnector_enum_list[] =
117 {
118         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
119         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
120         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
121         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
122         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
123 };
124
125 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
126                  drm_tv_subconnector_enum_list)
127
128 static struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
129         { DRM_MODE_DIRTY_OFF,      "Off"      },
130         { DRM_MODE_DIRTY_ON,       "On"       },
131         { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
132 };
133
134 DRM_ENUM_NAME_FN(drm_get_dirty_info_name,
135                  drm_dirty_info_enum_list)
136
137 struct drm_conn_prop_enum_list {
138         int type;
139         char *name;
140         int count;
141 };
142
143 /*
144  * Connector and encoder types.
145  */
146 static struct drm_conn_prop_enum_list drm_connector_enum_list[] =
147 {       { DRM_MODE_CONNECTOR_Unknown, "Unknown", 0 },
148         { DRM_MODE_CONNECTOR_VGA, "VGA", 0 },
149         { DRM_MODE_CONNECTOR_DVII, "DVI-I", 0 },
150         { DRM_MODE_CONNECTOR_DVID, "DVI-D", 0 },
151         { DRM_MODE_CONNECTOR_DVIA, "DVI-A", 0 },
152         { DRM_MODE_CONNECTOR_Composite, "Composite", 0 },
153         { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO", 0 },
154         { DRM_MODE_CONNECTOR_LVDS, "LVDS", 0 },
155         { DRM_MODE_CONNECTOR_Component, "Component", 0 },
156         { DRM_MODE_CONNECTOR_9PinDIN, "9-pin DIN", 0 },
157         { DRM_MODE_CONNECTOR_DisplayPort, "DisplayPort", 0 },
158         { DRM_MODE_CONNECTOR_HDMIA, "HDMI Type A", 0 },
159         { DRM_MODE_CONNECTOR_HDMIB, "HDMI Type B", 0 },
160         { DRM_MODE_CONNECTOR_TV, "TV", 0 },
161         { DRM_MODE_CONNECTOR_eDP, "Embedded DisplayPort", 0 },
162 };
163
164 static struct drm_prop_enum_list drm_encoder_enum_list[] =
165 {       { DRM_MODE_ENCODER_NONE, "None" },
166         { DRM_MODE_ENCODER_DAC, "DAC" },
167         { DRM_MODE_ENCODER_TMDS, "TMDS" },
168         { DRM_MODE_ENCODER_LVDS, "LVDS" },
169         { DRM_MODE_ENCODER_TVDAC, "TV" },
170 };
171
172 char *drm_get_encoder_name(struct drm_encoder *encoder)
173 {
174         static char buf[32];
175
176         snprintf(buf, 32, "%s-%d",
177                  drm_encoder_enum_list[encoder->encoder_type].name,
178                  encoder->base.id);
179         return buf;
180 }
181 EXPORT_SYMBOL(drm_get_encoder_name);
182
183 char *drm_get_connector_name(struct drm_connector *connector)
184 {
185         static char buf[32];
186
187         snprintf(buf, 32, "%s-%d",
188                  drm_connector_enum_list[connector->connector_type].name,
189                  connector->connector_type_id);
190         return buf;
191 }
192 EXPORT_SYMBOL(drm_get_connector_name);
193
194 char *drm_get_connector_status_name(enum drm_connector_status status)
195 {
196         if (status == connector_status_connected)
197                 return "connected";
198         else if (status == connector_status_disconnected)
199                 return "disconnected";
200         else
201                 return "unknown";
202 }
203
204 /**
205  * drm_mode_object_get - allocate a new identifier
206  * @dev: DRM device
207  * @ptr: object pointer, used to generate unique ID
208  * @type: object type
209  *
210  * LOCKING:
211  *
212  * Create a unique identifier based on @ptr in @dev's identifier space.  Used
213  * for tracking modes, CRTCs and connectors.
214  *
215  * RETURNS:
216  * New unique (relative to other objects in @dev) integer identifier for the
217  * object.
218  */
219 static int drm_mode_object_get(struct drm_device *dev,
220                                struct drm_mode_object *obj, uint32_t obj_type)
221 {
222         int new_id = 0;
223         int ret;
224
225 again:
226         if (idr_pre_get(&dev->mode_config.crtc_idr, GFP_KERNEL) == 0) {
227                 DRM_ERROR("Ran out memory getting a mode number\n");
228                 return -EINVAL;
229         }
230
231         mutex_lock(&dev->mode_config.idr_mutex);
232         ret = idr_get_new_above(&dev->mode_config.crtc_idr, obj, 1, &new_id);
233         mutex_unlock(&dev->mode_config.idr_mutex);
234         if (ret == -EAGAIN)
235                 goto again;
236
237         obj->id = new_id;
238         obj->type = obj_type;
239         return 0;
240 }
241
242 /**
243  * drm_mode_object_put - free an identifer
244  * @dev: DRM device
245  * @id: ID to free
246  *
247  * LOCKING:
248  * Caller must hold DRM mode_config lock.
249  *
250  * Free @id from @dev's unique identifier pool.
251  */
252 static void drm_mode_object_put(struct drm_device *dev,
253                                 struct drm_mode_object *object)
254 {
255         mutex_lock(&dev->mode_config.idr_mutex);
256         idr_remove(&dev->mode_config.crtc_idr, object->id);
257         mutex_unlock(&dev->mode_config.idr_mutex);
258 }
259
260 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
261                 uint32_t id, uint32_t type)
262 {
263         struct drm_mode_object *obj = NULL;
264
265         mutex_lock(&dev->mode_config.idr_mutex);
266         obj = idr_find(&dev->mode_config.crtc_idr, id);
267         if (!obj || (obj->type != type) || (obj->id != id))
268                 obj = NULL;
269         mutex_unlock(&dev->mode_config.idr_mutex);
270
271         return obj;
272 }
273 EXPORT_SYMBOL(drm_mode_object_find);
274
275 /**
276  * drm_framebuffer_init - initialize a framebuffer
277  * @dev: DRM device
278  *
279  * LOCKING:
280  * Caller must hold mode config lock.
281  *
282  * Allocates an ID for the framebuffer's parent mode object, sets its mode
283  * functions & device file and adds it to the master fd list.
284  *
285  * RETURNS:
286  * Zero on success, error code on failure.
287  */
288 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
289                          const struct drm_framebuffer_funcs *funcs)
290 {
291         int ret;
292
293         ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
294         if (ret) {
295                 return ret;
296         }
297
298         fb->dev = dev;
299         fb->funcs = funcs;
300         dev->mode_config.num_fb++;
301         list_add(&fb->head, &dev->mode_config.fb_list);
302
303         return 0;
304 }
305 EXPORT_SYMBOL(drm_framebuffer_init);
306
307 /**
308  * drm_framebuffer_cleanup - remove a framebuffer object
309  * @fb: framebuffer to remove
310  *
311  * LOCKING:
312  * Caller must hold mode config lock.
313  *
314  * Scans all the CRTCs in @dev's mode_config.  If they're using @fb, removes
315  * it, setting it to NULL.
316  */
317 void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
318 {
319         struct drm_device *dev = fb->dev;
320         struct drm_crtc *crtc;
321         struct drm_mode_set set;
322         int ret;
323
324         /* remove from any CRTC */
325         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
326                 if (crtc->fb == fb) {
327                         /* should turn off the crtc */
328                         memset(&set, 0, sizeof(struct drm_mode_set));
329                         set.crtc = crtc;
330                         set.fb = NULL;
331                         ret = crtc->funcs->set_config(&set);
332                         if (ret)
333                                 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
334                 }
335         }
336
337         drm_mode_object_put(dev, &fb->base);
338         list_del(&fb->head);
339         dev->mode_config.num_fb--;
340 }
341 EXPORT_SYMBOL(drm_framebuffer_cleanup);
342
343 /**
344  * drm_crtc_init - Initialise a new CRTC object
345  * @dev: DRM device
346  * @crtc: CRTC object to init
347  * @funcs: callbacks for the new CRTC
348  *
349  * LOCKING:
350  * Caller must hold mode config lock.
351  *
352  * Inits a new object created as base part of an driver crtc object.
353  */
354 void drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
355                    const struct drm_crtc_funcs *funcs)
356 {
357         crtc->dev = dev;
358         crtc->funcs = funcs;
359
360         mutex_lock(&dev->mode_config.mutex);
361         drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
362
363         list_add_tail(&crtc->head, &dev->mode_config.crtc_list);
364         dev->mode_config.num_crtc++;
365         mutex_unlock(&dev->mode_config.mutex);
366 }
367 EXPORT_SYMBOL(drm_crtc_init);
368
369 /**
370  * drm_crtc_cleanup - Cleans up the core crtc usage.
371  * @crtc: CRTC to cleanup
372  *
373  * LOCKING:
374  * Caller must hold mode config lock.
375  *
376  * Cleanup @crtc. Removes from drm modesetting space
377  * does NOT free object, caller does that.
378  */
379 void drm_crtc_cleanup(struct drm_crtc *crtc)
380 {
381         struct drm_device *dev = crtc->dev;
382
383         if (crtc->gamma_store) {
384                 kfree(crtc->gamma_store);
385                 crtc->gamma_store = NULL;
386         }
387
388         drm_mode_object_put(dev, &crtc->base);
389         list_del(&crtc->head);
390         dev->mode_config.num_crtc--;
391 }
392 EXPORT_SYMBOL(drm_crtc_cleanup);
393
394 /**
395  * drm_mode_probed_add - add a mode to a connector's probed mode list
396  * @connector: connector the new mode
397  * @mode: mode data
398  *
399  * LOCKING:
400  * Caller must hold mode config lock.
401  *
402  * Add @mode to @connector's mode list for later use.
403  */
404 void drm_mode_probed_add(struct drm_connector *connector,
405                          struct drm_display_mode *mode)
406 {
407         list_add(&mode->head, &connector->probed_modes);
408 }
409 EXPORT_SYMBOL(drm_mode_probed_add);
410
411 /**
412  * drm_mode_remove - remove and free a mode
413  * @connector: connector list to modify
414  * @mode: mode to remove
415  *
416  * LOCKING:
417  * Caller must hold mode config lock.
418  *
419  * Remove @mode from @connector's mode list, then free it.
420  */
421 void drm_mode_remove(struct drm_connector *connector,
422                      struct drm_display_mode *mode)
423 {
424         list_del(&mode->head);
425         kfree(mode);
426 }
427 EXPORT_SYMBOL(drm_mode_remove);
428
429 /**
430  * drm_connector_init - Init a preallocated connector
431  * @dev: DRM device
432  * @connector: the connector to init
433  * @funcs: callbacks for this connector
434  * @name: user visible name of the connector
435  *
436  * LOCKING:
437  * Caller must hold @dev's mode_config lock.
438  *
439  * Initialises a preallocated connector. Connectors should be
440  * subclassed as part of driver connector objects.
441  */
442 void drm_connector_init(struct drm_device *dev,
443                      struct drm_connector *connector,
444                      const struct drm_connector_funcs *funcs,
445                      int connector_type)
446 {
447         mutex_lock(&dev->mode_config.mutex);
448
449         connector->dev = dev;
450         connector->funcs = funcs;
451         drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR);
452         connector->connector_type = connector_type;
453         connector->connector_type_id =
454                 ++drm_connector_enum_list[connector_type].count; /* TODO */
455         INIT_LIST_HEAD(&connector->user_modes);
456         INIT_LIST_HEAD(&connector->probed_modes);
457         INIT_LIST_HEAD(&connector->modes);
458         connector->edid_blob_ptr = NULL;
459
460         list_add_tail(&connector->head, &dev->mode_config.connector_list);
461         dev->mode_config.num_connector++;
462
463         drm_connector_attach_property(connector,
464                                       dev->mode_config.edid_property, 0);
465
466         drm_connector_attach_property(connector,
467                                       dev->mode_config.dpms_property, 0);
468
469         mutex_unlock(&dev->mode_config.mutex);
470 }
471 EXPORT_SYMBOL(drm_connector_init);
472
473 /**
474  * drm_connector_cleanup - cleans up an initialised connector
475  * @connector: connector to cleanup
476  *
477  * LOCKING:
478  * Caller must hold @dev's mode_config lock.
479  *
480  * Cleans up the connector but doesn't free the object.
481  */
482 void drm_connector_cleanup(struct drm_connector *connector)
483 {
484         struct drm_device *dev = connector->dev;
485         struct drm_display_mode *mode, *t;
486
487         list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
488                 drm_mode_remove(connector, mode);
489
490         list_for_each_entry_safe(mode, t, &connector->modes, head)
491                 drm_mode_remove(connector, mode);
492
493         list_for_each_entry_safe(mode, t, &connector->user_modes, head)
494                 drm_mode_remove(connector, mode);
495
496         kfree(connector->fb_helper_private);
497         mutex_lock(&dev->mode_config.mutex);
498         drm_mode_object_put(dev, &connector->base);
499         list_del(&connector->head);
500         mutex_unlock(&dev->mode_config.mutex);
501 }
502 EXPORT_SYMBOL(drm_connector_cleanup);
503
504 void drm_encoder_init(struct drm_device *dev,
505                       struct drm_encoder *encoder,
506                       const struct drm_encoder_funcs *funcs,
507                       int encoder_type)
508 {
509         mutex_lock(&dev->mode_config.mutex);
510
511         encoder->dev = dev;
512
513         drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
514         encoder->encoder_type = encoder_type;
515         encoder->funcs = funcs;
516
517         list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
518         dev->mode_config.num_encoder++;
519
520         mutex_unlock(&dev->mode_config.mutex);
521 }
522 EXPORT_SYMBOL(drm_encoder_init);
523
524 void drm_encoder_cleanup(struct drm_encoder *encoder)
525 {
526         struct drm_device *dev = encoder->dev;
527         mutex_lock(&dev->mode_config.mutex);
528         drm_mode_object_put(dev, &encoder->base);
529         list_del(&encoder->head);
530         mutex_unlock(&dev->mode_config.mutex);
531 }
532 EXPORT_SYMBOL(drm_encoder_cleanup);
533
534 /**
535  * drm_mode_create - create a new display mode
536  * @dev: DRM device
537  *
538  * LOCKING:
539  * Caller must hold DRM mode_config lock.
540  *
541  * Create a new drm_display_mode, give it an ID, and return it.
542  *
543  * RETURNS:
544  * Pointer to new mode on success, NULL on error.
545  */
546 struct drm_display_mode *drm_mode_create(struct drm_device *dev)
547 {
548         struct drm_display_mode *nmode;
549
550         nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
551         if (!nmode)
552                 return NULL;
553
554         drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE);
555         return nmode;
556 }
557 EXPORT_SYMBOL(drm_mode_create);
558
559 /**
560  * drm_mode_destroy - remove a mode
561  * @dev: DRM device
562  * @mode: mode to remove
563  *
564  * LOCKING:
565  * Caller must hold mode config lock.
566  *
567  * Free @mode's unique identifier, then free it.
568  */
569 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
570 {
571         drm_mode_object_put(dev, &mode->base);
572
573         kfree(mode);
574 }
575 EXPORT_SYMBOL(drm_mode_destroy);
576
577 static int drm_mode_create_standard_connector_properties(struct drm_device *dev)
578 {
579         struct drm_property *edid;
580         struct drm_property *dpms;
581         int i;
582
583         /*
584          * Standard properties (apply to all connectors)
585          */
586         edid = drm_property_create(dev, DRM_MODE_PROP_BLOB |
587                                    DRM_MODE_PROP_IMMUTABLE,
588                                    "EDID", 0);
589         dev->mode_config.edid_property = edid;
590
591         dpms = drm_property_create(dev, DRM_MODE_PROP_ENUM,
592                                    "DPMS", ARRAY_SIZE(drm_dpms_enum_list));
593         for (i = 0; i < ARRAY_SIZE(drm_dpms_enum_list); i++)
594                 drm_property_add_enum(dpms, i, drm_dpms_enum_list[i].type,
595                                       drm_dpms_enum_list[i].name);
596         dev->mode_config.dpms_property = dpms;
597
598         return 0;
599 }
600
601 /**
602  * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
603  * @dev: DRM device
604  *
605  * Called by a driver the first time a DVI-I connector is made.
606  */
607 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
608 {
609         struct drm_property *dvi_i_selector;
610         struct drm_property *dvi_i_subconnector;
611         int i;
612
613         if (dev->mode_config.dvi_i_select_subconnector_property)
614                 return 0;
615
616         dvi_i_selector =
617                 drm_property_create(dev, DRM_MODE_PROP_ENUM,
618                                     "select subconnector",
619                                     ARRAY_SIZE(drm_dvi_i_select_enum_list));
620         for (i = 0; i < ARRAY_SIZE(drm_dvi_i_select_enum_list); i++)
621                 drm_property_add_enum(dvi_i_selector, i,
622                                       drm_dvi_i_select_enum_list[i].type,
623                                       drm_dvi_i_select_enum_list[i].name);
624         dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
625
626         dvi_i_subconnector =
627                 drm_property_create(dev, DRM_MODE_PROP_ENUM |
628                                     DRM_MODE_PROP_IMMUTABLE,
629                                     "subconnector",
630                                     ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
631         for (i = 0; i < ARRAY_SIZE(drm_dvi_i_subconnector_enum_list); i++)
632                 drm_property_add_enum(dvi_i_subconnector, i,
633                                       drm_dvi_i_subconnector_enum_list[i].type,
634                                       drm_dvi_i_subconnector_enum_list[i].name);
635         dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
636
637         return 0;
638 }
639 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
640
641 /**
642  * drm_create_tv_properties - create TV specific connector properties
643  * @dev: DRM device
644  * @num_modes: number of different TV formats (modes) supported
645  * @modes: array of pointers to strings containing name of each format
646  *
647  * Called by a driver's TV initialization routine, this function creates
648  * the TV specific connector properties for a given device.  Caller is
649  * responsible for allocating a list of format names and passing them to
650  * this routine.
651  */
652 int drm_mode_create_tv_properties(struct drm_device *dev, int num_modes,
653                                   char *modes[])
654 {
655         struct drm_property *tv_selector;
656         struct drm_property *tv_subconnector;
657         int i;
658
659         if (dev->mode_config.tv_select_subconnector_property)
660                 return 0;
661
662         /*
663          * Basic connector properties
664          */
665         tv_selector = drm_property_create(dev, DRM_MODE_PROP_ENUM,
666                                           "select subconnector",
667                                           ARRAY_SIZE(drm_tv_select_enum_list));
668         for (i = 0; i < ARRAY_SIZE(drm_tv_select_enum_list); i++)
669                 drm_property_add_enum(tv_selector, i,
670                                       drm_tv_select_enum_list[i].type,
671                                       drm_tv_select_enum_list[i].name);
672         dev->mode_config.tv_select_subconnector_property = tv_selector;
673
674         tv_subconnector =
675                 drm_property_create(dev, DRM_MODE_PROP_ENUM |
676                                     DRM_MODE_PROP_IMMUTABLE, "subconnector",
677                                     ARRAY_SIZE(drm_tv_subconnector_enum_list));
678         for (i = 0; i < ARRAY_SIZE(drm_tv_subconnector_enum_list); i++)
679                 drm_property_add_enum(tv_subconnector, i,
680                                       drm_tv_subconnector_enum_list[i].type,
681                                       drm_tv_subconnector_enum_list[i].name);
682         dev->mode_config.tv_subconnector_property = tv_subconnector;
683
684         /*
685          * Other, TV specific properties: margins & TV modes.
686          */
687         dev->mode_config.tv_left_margin_property =
688                 drm_property_create(dev, DRM_MODE_PROP_RANGE,
689                                     "left margin", 2);
690         dev->mode_config.tv_left_margin_property->values[0] = 0;
691         dev->mode_config.tv_left_margin_property->values[1] = 100;
692
693         dev->mode_config.tv_right_margin_property =
694                 drm_property_create(dev, DRM_MODE_PROP_RANGE,
695                                     "right margin", 2);
696         dev->mode_config.tv_right_margin_property->values[0] = 0;
697         dev->mode_config.tv_right_margin_property->values[1] = 100;
698
699         dev->mode_config.tv_top_margin_property =
700                 drm_property_create(dev, DRM_MODE_PROP_RANGE,
701                                     "top margin", 2);
702         dev->mode_config.tv_top_margin_property->values[0] = 0;
703         dev->mode_config.tv_top_margin_property->values[1] = 100;
704
705         dev->mode_config.tv_bottom_margin_property =
706                 drm_property_create(dev, DRM_MODE_PROP_RANGE,
707                                     "bottom margin", 2);
708         dev->mode_config.tv_bottom_margin_property->values[0] = 0;
709         dev->mode_config.tv_bottom_margin_property->values[1] = 100;
710
711         dev->mode_config.tv_mode_property =
712                 drm_property_create(dev, DRM_MODE_PROP_ENUM,
713                                     "mode", num_modes);
714         for (i = 0; i < num_modes; i++)
715                 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
716                                       i, modes[i]);
717
718         dev->mode_config.tv_brightness_property =
719                 drm_property_create(dev, DRM_MODE_PROP_RANGE,
720                                     "brightness", 2);
721         dev->mode_config.tv_brightness_property->values[0] = 0;
722         dev->mode_config.tv_brightness_property->values[1] = 100;
723
724         dev->mode_config.tv_contrast_property =
725                 drm_property_create(dev, DRM_MODE_PROP_RANGE,
726                                     "contrast", 2);
727         dev->mode_config.tv_contrast_property->values[0] = 0;
728         dev->mode_config.tv_contrast_property->values[1] = 100;
729
730         dev->mode_config.tv_flicker_reduction_property =
731                 drm_property_create(dev, DRM_MODE_PROP_RANGE,
732                                     "flicker reduction", 2);
733         dev->mode_config.tv_flicker_reduction_property->values[0] = 0;
734         dev->mode_config.tv_flicker_reduction_property->values[1] = 100;
735
736         dev->mode_config.tv_overscan_property =
737                 drm_property_create(dev, DRM_MODE_PROP_RANGE,
738                                     "overscan", 2);
739         dev->mode_config.tv_overscan_property->values[0] = 0;
740         dev->mode_config.tv_overscan_property->values[1] = 100;
741
742         dev->mode_config.tv_saturation_property =
743                 drm_property_create(dev, DRM_MODE_PROP_RANGE,
744                                     "saturation", 2);
745         dev->mode_config.tv_saturation_property->values[0] = 0;
746         dev->mode_config.tv_saturation_property->values[1] = 100;
747
748         dev->mode_config.tv_hue_property =
749                 drm_property_create(dev, DRM_MODE_PROP_RANGE,
750                                     "hue", 2);
751         dev->mode_config.tv_hue_property->values[0] = 0;
752         dev->mode_config.tv_hue_property->values[1] = 100;
753
754         return 0;
755 }
756 EXPORT_SYMBOL(drm_mode_create_tv_properties);
757
758 /**
759  * drm_mode_create_scaling_mode_property - create scaling mode property
760  * @dev: DRM device
761  *
762  * Called by a driver the first time it's needed, must be attached to desired
763  * connectors.
764  */
765 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
766 {
767         struct drm_property *scaling_mode;
768         int i;
769
770         if (dev->mode_config.scaling_mode_property)
771                 return 0;
772
773         scaling_mode =
774                 drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
775                                     ARRAY_SIZE(drm_scaling_mode_enum_list));
776         for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++)
777                 drm_property_add_enum(scaling_mode, i,
778                                       drm_scaling_mode_enum_list[i].type,
779                                       drm_scaling_mode_enum_list[i].name);
780
781         dev->mode_config.scaling_mode_property = scaling_mode;
782
783         return 0;
784 }
785 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
786
787 /**
788  * drm_mode_create_dithering_property - create dithering property
789  * @dev: DRM device
790  *
791  * Called by a driver the first time it's needed, must be attached to desired
792  * connectors.
793  */
794 int drm_mode_create_dithering_property(struct drm_device *dev)
795 {
796         struct drm_property *dithering_mode;
797         int i;
798
799         if (dev->mode_config.dithering_mode_property)
800                 return 0;
801
802         dithering_mode =
803                 drm_property_create(dev, DRM_MODE_PROP_ENUM, "dithering",
804                                     ARRAY_SIZE(drm_dithering_mode_enum_list));
805         for (i = 0; i < ARRAY_SIZE(drm_dithering_mode_enum_list); i++)
806                 drm_property_add_enum(dithering_mode, i,
807                                       drm_dithering_mode_enum_list[i].type,
808                                       drm_dithering_mode_enum_list[i].name);
809         dev->mode_config.dithering_mode_property = dithering_mode;
810
811         return 0;
812 }
813 EXPORT_SYMBOL(drm_mode_create_dithering_property);
814
815 /**
816  * drm_mode_create_dirty_property - create dirty property
817  * @dev: DRM device
818  *
819  * Called by a driver the first time it's needed, must be attached to desired
820  * connectors.
821  */
822 int drm_mode_create_dirty_info_property(struct drm_device *dev)
823 {
824         struct drm_property *dirty_info;
825         int i;
826
827         if (dev->mode_config.dirty_info_property)
828                 return 0;
829
830         dirty_info =
831                 drm_property_create(dev, DRM_MODE_PROP_ENUM |
832                                     DRM_MODE_PROP_IMMUTABLE,
833                                     "dirty",
834                                     ARRAY_SIZE(drm_dirty_info_enum_list));
835         for (i = 0; i < ARRAY_SIZE(drm_dirty_info_enum_list); i++)
836                 drm_property_add_enum(dirty_info, i,
837                                       drm_dirty_info_enum_list[i].type,
838                                       drm_dirty_info_enum_list[i].name);
839         dev->mode_config.dirty_info_property = dirty_info;
840
841         return 0;
842 }
843 EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
844
845 /**
846  * drm_mode_config_init - initialize DRM mode_configuration structure
847  * @dev: DRM device
848  *
849  * LOCKING:
850  * None, should happen single threaded at init time.
851  *
852  * Initialize @dev's mode_config structure, used for tracking the graphics
853  * configuration of @dev.
854  */
855 void drm_mode_config_init(struct drm_device *dev)
856 {
857         mutex_init(&dev->mode_config.mutex);
858         mutex_init(&dev->mode_config.idr_mutex);
859         INIT_LIST_HEAD(&dev->mode_config.fb_list);
860         INIT_LIST_HEAD(&dev->mode_config.fb_kernel_list);
861         INIT_LIST_HEAD(&dev->mode_config.crtc_list);
862         INIT_LIST_HEAD(&dev->mode_config.connector_list);
863         INIT_LIST_HEAD(&dev->mode_config.encoder_list);
864         INIT_LIST_HEAD(&dev->mode_config.property_list);
865         INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
866         idr_init(&dev->mode_config.crtc_idr);
867
868         mutex_lock(&dev->mode_config.mutex);
869         drm_mode_create_standard_connector_properties(dev);
870         mutex_unlock(&dev->mode_config.mutex);
871
872         /* Just to be sure */
873         dev->mode_config.num_fb = 0;
874         dev->mode_config.num_connector = 0;
875         dev->mode_config.num_crtc = 0;
876         dev->mode_config.num_encoder = 0;
877 }
878 EXPORT_SYMBOL(drm_mode_config_init);
879
880 int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
881 {
882         uint32_t total_objects = 0;
883
884         total_objects += dev->mode_config.num_crtc;
885         total_objects += dev->mode_config.num_connector;
886         total_objects += dev->mode_config.num_encoder;
887
888         if (total_objects == 0)
889                 return -EINVAL;
890
891         group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL);
892         if (!group->id_list)
893                 return -ENOMEM;
894
895         group->num_crtcs = 0;
896         group->num_connectors = 0;
897         group->num_encoders = 0;
898         return 0;
899 }
900
901 int drm_mode_group_init_legacy_group(struct drm_device *dev,
902                                      struct drm_mode_group *group)
903 {
904         struct drm_crtc *crtc;
905         struct drm_encoder *encoder;
906         struct drm_connector *connector;
907         int ret;
908
909         if ((ret = drm_mode_group_init(dev, group)))
910                 return ret;
911
912         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
913                 group->id_list[group->num_crtcs++] = crtc->base.id;
914
915         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
916                 group->id_list[group->num_crtcs + group->num_encoders++] =
917                 encoder->base.id;
918
919         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
920                 group->id_list[group->num_crtcs + group->num_encoders +
921                                group->num_connectors++] = connector->base.id;
922
923         return 0;
924 }
925
926 /**
927  * drm_mode_config_cleanup - free up DRM mode_config info
928  * @dev: DRM device
929  *
930  * LOCKING:
931  * Caller must hold mode config lock.
932  *
933  * Free up all the connectors and CRTCs associated with this DRM device, then
934  * free up the framebuffers and associated buffer objects.
935  *
936  * FIXME: cleanup any dangling user buffer objects too
937  */
938 void drm_mode_config_cleanup(struct drm_device *dev)
939 {
940         struct drm_connector *connector, *ot;
941         struct drm_crtc *crtc, *ct;
942         struct drm_encoder *encoder, *enct;
943         struct drm_framebuffer *fb, *fbt;
944         struct drm_property *property, *pt;
945
946         list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
947                                  head) {
948                 encoder->funcs->destroy(encoder);
949         }
950
951         list_for_each_entry_safe(connector, ot,
952                                  &dev->mode_config.connector_list, head) {
953                 connector->funcs->destroy(connector);
954         }
955
956         list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
957                                  head) {
958                 drm_property_destroy(dev, property);
959         }
960
961         list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
962                 fb->funcs->destroy(fb);
963         }
964
965         list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
966                 crtc->funcs->destroy(crtc);
967         }
968
969 }
970 EXPORT_SYMBOL(drm_mode_config_cleanup);
971
972 /**
973  * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
974  * @out: drm_mode_modeinfo struct to return to the user
975  * @in: drm_display_mode to use
976  *
977  * LOCKING:
978  * None.
979  *
980  * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
981  * the user.
982  */
983 void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out,
984                                struct drm_display_mode *in)
985 {
986         out->clock = in->clock;
987         out->hdisplay = in->hdisplay;
988         out->hsync_start = in->hsync_start;
989         out->hsync_end = in->hsync_end;
990         out->htotal = in->htotal;
991         out->hskew = in->hskew;
992         out->vdisplay = in->vdisplay;
993         out->vsync_start = in->vsync_start;
994         out->vsync_end = in->vsync_end;
995         out->vtotal = in->vtotal;
996         out->vscan = in->vscan;
997         out->vrefresh = in->vrefresh;
998         out->flags = in->flags;
999         out->type = in->type;
1000         strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1001         out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1002 }
1003
1004 /**
1005  * drm_crtc_convert_to_umode - convert a modeinfo into a drm_display_mode
1006  * @out: drm_display_mode to return to the user
1007  * @in: drm_mode_modeinfo to use
1008  *
1009  * LOCKING:
1010  * None.
1011  *
1012  * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
1013  * the caller.
1014  */
1015 void drm_crtc_convert_umode(struct drm_display_mode *out,
1016                             struct drm_mode_modeinfo *in)
1017 {
1018         out->clock = in->clock;
1019         out->hdisplay = in->hdisplay;
1020         out->hsync_start = in->hsync_start;
1021         out->hsync_end = in->hsync_end;
1022         out->htotal = in->htotal;
1023         out->hskew = in->hskew;
1024         out->vdisplay = in->vdisplay;
1025         out->vsync_start = in->vsync_start;
1026         out->vsync_end = in->vsync_end;
1027         out->vtotal = in->vtotal;
1028         out->vscan = in->vscan;
1029         out->vrefresh = in->vrefresh;
1030         out->flags = in->flags;
1031         out->type = in->type;
1032         strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1033         out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1034 }
1035
1036 /**
1037  * drm_mode_getresources - get graphics configuration
1038  * @inode: inode from the ioctl
1039  * @filp: file * from the ioctl
1040  * @cmd: cmd from ioctl
1041  * @arg: arg from ioctl
1042  *
1043  * LOCKING:
1044  * Takes mode config lock.
1045  *
1046  * Construct a set of configuration description structures and return
1047  * them to the user, including CRTC, connector and framebuffer configuration.
1048  *
1049  * Called by the user via ioctl.
1050  *
1051  * RETURNS:
1052  * Zero on success, errno on failure.
1053  */
1054 int drm_mode_getresources(struct drm_device *dev, void *data,
1055                           struct drm_file *file_priv)
1056 {
1057         struct drm_mode_card_res *card_res = data;
1058         struct list_head *lh;
1059         struct drm_framebuffer *fb;
1060         struct drm_connector *connector;
1061         struct drm_crtc *crtc;
1062         struct drm_encoder *encoder;
1063         int ret = 0;
1064         int connector_count = 0;
1065         int crtc_count = 0;
1066         int fb_count = 0;
1067         int encoder_count = 0;
1068         int copied = 0, i;
1069         uint32_t __user *fb_id;
1070         uint32_t __user *crtc_id;
1071         uint32_t __user *connector_id;
1072         uint32_t __user *encoder_id;
1073         struct drm_mode_group *mode_group;
1074
1075         mutex_lock(&dev->mode_config.mutex);
1076
1077         /*
1078          * For the non-control nodes we need to limit the list of resources
1079          * by IDs in the group list for this node
1080          */
1081         list_for_each(lh, &file_priv->fbs)
1082                 fb_count++;
1083
1084         mode_group = &file_priv->master->minor->mode_group;
1085         if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1086
1087                 list_for_each(lh, &dev->mode_config.crtc_list)
1088                         crtc_count++;
1089
1090                 list_for_each(lh, &dev->mode_config.connector_list)
1091                         connector_count++;
1092
1093                 list_for_each(lh, &dev->mode_config.encoder_list)
1094                         encoder_count++;
1095         } else {
1096
1097                 crtc_count = mode_group->num_crtcs;
1098                 connector_count = mode_group->num_connectors;
1099                 encoder_count = mode_group->num_encoders;
1100         }
1101
1102         card_res->max_height = dev->mode_config.max_height;
1103         card_res->min_height = dev->mode_config.min_height;
1104         card_res->max_width = dev->mode_config.max_width;
1105         card_res->min_width = dev->mode_config.min_width;
1106
1107         /* handle this in 4 parts */
1108         /* FBs */
1109         if (card_res->count_fbs >= fb_count) {
1110                 copied = 0;
1111                 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
1112                 list_for_each_entry(fb, &file_priv->fbs, head) {
1113                         if (put_user(fb->base.id, fb_id + copied)) {
1114                                 ret = -EFAULT;
1115                                 goto out;
1116                         }
1117                         copied++;
1118                 }
1119         }
1120         card_res->count_fbs = fb_count;
1121
1122         /* CRTCs */
1123         if (card_res->count_crtcs >= crtc_count) {
1124                 copied = 0;
1125                 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
1126                 if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1127                         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
1128                                             head) {
1129                                 DRM_DEBUG_KMS("CRTC ID is %d\n", crtc->base.id);
1130                                 if (put_user(crtc->base.id, crtc_id + copied)) {
1131                                         ret = -EFAULT;
1132                                         goto out;
1133                                 }
1134                                 copied++;
1135                         }
1136                 } else {
1137                         for (i = 0; i < mode_group->num_crtcs; i++) {
1138                                 if (put_user(mode_group->id_list[i],
1139                                              crtc_id + copied)) {
1140                                         ret = -EFAULT;
1141                                         goto out;
1142                                 }
1143                                 copied++;
1144                         }
1145                 }
1146         }
1147         card_res->count_crtcs = crtc_count;
1148
1149         /* Encoders */
1150         if (card_res->count_encoders >= encoder_count) {
1151                 copied = 0;
1152                 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
1153                 if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1154                         list_for_each_entry(encoder,
1155                                             &dev->mode_config.encoder_list,
1156                                             head) {
1157                                 DRM_DEBUG_KMS("ENCODER ID is %d\n",
1158                                           encoder->base.id);
1159                                 if (put_user(encoder->base.id, encoder_id +
1160                                              copied)) {
1161                                         ret = -EFAULT;
1162                                         goto out;
1163                                 }
1164                                 copied++;
1165                         }
1166                 } else {
1167                         for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) {
1168                                 if (put_user(mode_group->id_list[i],
1169                                              encoder_id + copied)) {
1170                                         ret = -EFAULT;
1171                                         goto out;
1172                                 }
1173                                 copied++;
1174                         }
1175
1176                 }
1177         }
1178         card_res->count_encoders = encoder_count;
1179
1180         /* Connectors */
1181         if (card_res->count_connectors >= connector_count) {
1182                 copied = 0;
1183                 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
1184                 if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1185                         list_for_each_entry(connector,
1186                                             &dev->mode_config.connector_list,
1187                                             head) {
1188                                 DRM_DEBUG_KMS("CONNECTOR ID is %d\n",
1189                                           connector->base.id);
1190                                 if (put_user(connector->base.id,
1191                                              connector_id + copied)) {
1192                                         ret = -EFAULT;
1193                                         goto out;
1194                                 }
1195                                 copied++;
1196                         }
1197                 } else {
1198                         int start = mode_group->num_crtcs +
1199                                 mode_group->num_encoders;
1200                         for (i = start; i < start + mode_group->num_connectors; i++) {
1201                                 if (put_user(mode_group->id_list[i],
1202                                              connector_id + copied)) {
1203                                         ret = -EFAULT;
1204                                         goto out;
1205                                 }
1206                                 copied++;
1207                         }
1208                 }
1209         }
1210         card_res->count_connectors = connector_count;
1211
1212         DRM_DEBUG_KMS("Counted %d %d %d\n", card_res->count_crtcs,
1213                   card_res->count_connectors, card_res->count_encoders);
1214
1215 out:
1216         mutex_unlock(&dev->mode_config.mutex);
1217         return ret;
1218 }
1219
1220 /**
1221  * drm_mode_getcrtc - get CRTC configuration
1222  * @inode: inode from the ioctl
1223  * @filp: file * from the ioctl
1224  * @cmd: cmd from ioctl
1225  * @arg: arg from ioctl
1226  *
1227  * LOCKING:
1228  * Caller? (FIXME)
1229  *
1230  * Construct a CRTC configuration structure to return to the user.
1231  *
1232  * Called by the user via ioctl.
1233  *
1234  * RETURNS:
1235  * Zero on success, errno on failure.
1236  */
1237 int drm_mode_getcrtc(struct drm_device *dev,
1238                      void *data, struct drm_file *file_priv)
1239 {
1240         struct drm_mode_crtc *crtc_resp = data;
1241         struct drm_crtc *crtc;
1242         struct drm_mode_object *obj;
1243         int ret = 0;
1244
1245         mutex_lock(&dev->mode_config.mutex);
1246
1247         obj = drm_mode_object_find(dev, crtc_resp->crtc_id,
1248                                    DRM_MODE_OBJECT_CRTC);
1249         if (!obj) {
1250                 ret = -EINVAL;
1251                 goto out;
1252         }
1253         crtc = obj_to_crtc(obj);
1254
1255         crtc_resp->x = crtc->x;
1256         crtc_resp->y = crtc->y;
1257         crtc_resp->gamma_size = crtc->gamma_size;
1258         if (crtc->fb)
1259                 crtc_resp->fb_id = crtc->fb->base.id;
1260         else
1261                 crtc_resp->fb_id = 0;
1262
1263         if (crtc->enabled) {
1264
1265                 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode);
1266                 crtc_resp->mode_valid = 1;
1267
1268         } else {
1269                 crtc_resp->mode_valid = 0;
1270         }
1271
1272 out:
1273         mutex_unlock(&dev->mode_config.mutex);
1274         return ret;
1275 }
1276
1277 /**
1278  * drm_mode_getconnector - get connector configuration
1279  * @inode: inode from the ioctl
1280  * @filp: file * from the ioctl
1281  * @cmd: cmd from ioctl
1282  * @arg: arg from ioctl
1283  *
1284  * LOCKING:
1285  * Caller? (FIXME)
1286  *
1287  * Construct a connector configuration structure to return to the user.
1288  *
1289  * Called by the user via ioctl.
1290  *
1291  * RETURNS:
1292  * Zero on success, errno on failure.
1293  */
1294 int drm_mode_getconnector(struct drm_device *dev, void *data,
1295                           struct drm_file *file_priv)
1296 {
1297         struct drm_mode_get_connector *out_resp = data;
1298         struct drm_mode_object *obj;
1299         struct drm_connector *connector;
1300         struct drm_display_mode *mode;
1301         int mode_count = 0;
1302         int props_count = 0;
1303         int encoders_count = 0;
1304         int ret = 0;
1305         int copied = 0;
1306         int i;
1307         struct drm_mode_modeinfo u_mode;
1308         struct drm_mode_modeinfo __user *mode_ptr;
1309         uint32_t __user *prop_ptr;
1310         uint64_t __user *prop_values;
1311         uint32_t __user *encoder_ptr;
1312
1313         memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1314
1315         DRM_DEBUG_KMS("connector id %d:\n", out_resp->connector_id);
1316
1317         mutex_lock(&dev->mode_config.mutex);
1318
1319         obj = drm_mode_object_find(dev, out_resp->connector_id,
1320                                    DRM_MODE_OBJECT_CONNECTOR);
1321         if (!obj) {
1322                 ret = -EINVAL;
1323                 goto out;
1324         }
1325         connector = obj_to_connector(obj);
1326
1327         for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
1328                 if (connector->property_ids[i] != 0) {
1329                         props_count++;
1330                 }
1331         }
1332
1333         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1334                 if (connector->encoder_ids[i] != 0) {
1335                         encoders_count++;
1336                 }
1337         }
1338
1339         if (out_resp->count_modes == 0) {
1340                 connector->funcs->fill_modes(connector,
1341                                              dev->mode_config.max_width,
1342                                              dev->mode_config.max_height);
1343         }
1344
1345         /* delayed so we get modes regardless of pre-fill_modes state */
1346         list_for_each_entry(mode, &connector->modes, head)
1347                 mode_count++;
1348
1349         out_resp->connector_id = connector->base.id;
1350         out_resp->connector_type = connector->connector_type;
1351         out_resp->connector_type_id = connector->connector_type_id;
1352         out_resp->mm_width = connector->display_info.width_mm;
1353         out_resp->mm_height = connector->display_info.height_mm;
1354         out_resp->subpixel = connector->display_info.subpixel_order;
1355         out_resp->connection = connector->status;
1356         if (connector->encoder)
1357                 out_resp->encoder_id = connector->encoder->base.id;
1358         else
1359                 out_resp->encoder_id = 0;
1360
1361         /*
1362          * This ioctl is called twice, once to determine how much space is
1363          * needed, and the 2nd time to fill it.
1364          */
1365         if ((out_resp->count_modes >= mode_count) && mode_count) {
1366                 copied = 0;
1367                 mode_ptr = (struct drm_mode_modeinfo *)(unsigned long)out_resp->modes_ptr;
1368                 list_for_each_entry(mode, &connector->modes, head) {
1369                         drm_crtc_convert_to_umode(&u_mode, mode);
1370                         if (copy_to_user(mode_ptr + copied,
1371                                          &u_mode, sizeof(u_mode))) {
1372                                 ret = -EFAULT;
1373                                 goto out;
1374                         }
1375                         copied++;
1376                 }
1377         }
1378         out_resp->count_modes = mode_count;
1379
1380         if ((out_resp->count_props >= props_count) && props_count) {
1381                 copied = 0;
1382                 prop_ptr = (uint32_t *)(unsigned long)(out_resp->props_ptr);
1383                 prop_values = (uint64_t *)(unsigned long)(out_resp->prop_values_ptr);
1384                 for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
1385                         if (connector->property_ids[i] != 0) {
1386                                 if (put_user(connector->property_ids[i],
1387                                              prop_ptr + copied)) {
1388                                         ret = -EFAULT;
1389                                         goto out;
1390                                 }
1391
1392                                 if (put_user(connector->property_values[i],
1393                                              prop_values + copied)) {
1394                                         ret = -EFAULT;
1395                                         goto out;
1396                                 }
1397                                 copied++;
1398                         }
1399                 }
1400         }
1401         out_resp->count_props = props_count;
1402
1403         if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1404                 copied = 0;
1405                 encoder_ptr = (uint32_t *)(unsigned long)(out_resp->encoders_ptr);
1406                 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1407                         if (connector->encoder_ids[i] != 0) {
1408                                 if (put_user(connector->encoder_ids[i],
1409                                              encoder_ptr + copied)) {
1410                                         ret = -EFAULT;
1411                                         goto out;
1412                                 }
1413                                 copied++;
1414                         }
1415                 }
1416         }
1417         out_resp->count_encoders = encoders_count;
1418
1419 out:
1420         mutex_unlock(&dev->mode_config.mutex);
1421         return ret;
1422 }
1423
1424 int drm_mode_getencoder(struct drm_device *dev, void *data,
1425                         struct drm_file *file_priv)
1426 {
1427         struct drm_mode_get_encoder *enc_resp = data;
1428         struct drm_mode_object *obj;
1429         struct drm_encoder *encoder;
1430         int ret = 0;
1431
1432         mutex_lock(&dev->mode_config.mutex);
1433         obj = drm_mode_object_find(dev, enc_resp->encoder_id,
1434                                    DRM_MODE_OBJECT_ENCODER);
1435         if (!obj) {
1436                 ret = -EINVAL;
1437                 goto out;
1438         }
1439         encoder = obj_to_encoder(obj);
1440
1441         if (encoder->crtc)
1442                 enc_resp->crtc_id = encoder->crtc->base.id;
1443         else
1444                 enc_resp->crtc_id = 0;
1445         enc_resp->encoder_type = encoder->encoder_type;
1446         enc_resp->encoder_id = encoder->base.id;
1447         enc_resp->possible_crtcs = encoder->possible_crtcs;
1448         enc_resp->possible_clones = encoder->possible_clones;
1449
1450 out:
1451         mutex_unlock(&dev->mode_config.mutex);
1452         return ret;
1453 }
1454
1455 /**
1456  * drm_mode_setcrtc - set CRTC configuration
1457  * @inode: inode from the ioctl
1458  * @filp: file * from the ioctl
1459  * @cmd: cmd from ioctl
1460  * @arg: arg from ioctl
1461  *
1462  * LOCKING:
1463  * Caller? (FIXME)
1464  *
1465  * Build a new CRTC configuration based on user request.
1466  *
1467  * Called by the user via ioctl.
1468  *
1469  * RETURNS:
1470  * Zero on success, errno on failure.
1471  */
1472 int drm_mode_setcrtc(struct drm_device *dev, void *data,
1473                      struct drm_file *file_priv)
1474 {
1475         struct drm_mode_config *config = &dev->mode_config;
1476         struct drm_mode_crtc *crtc_req = data;
1477         struct drm_mode_object *obj;
1478         struct drm_crtc *crtc, *crtcfb;
1479         struct drm_connector **connector_set = NULL, *connector;
1480         struct drm_framebuffer *fb = NULL;
1481         struct drm_display_mode *mode = NULL;
1482         struct drm_mode_set set;
1483         uint32_t __user *set_connectors_ptr;
1484         int ret = 0;
1485         int i;
1486
1487         mutex_lock(&dev->mode_config.mutex);
1488         obj = drm_mode_object_find(dev, crtc_req->crtc_id,
1489                                    DRM_MODE_OBJECT_CRTC);
1490         if (!obj) {
1491                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
1492                 ret = -EINVAL;
1493                 goto out;
1494         }
1495         crtc = obj_to_crtc(obj);
1496
1497         if (crtc_req->mode_valid) {
1498                 /* If we have a mode we need a framebuffer. */
1499                 /* If we pass -1, set the mode with the currently bound fb */
1500                 if (crtc_req->fb_id == -1) {
1501                         list_for_each_entry(crtcfb,
1502                                             &dev->mode_config.crtc_list, head) {
1503                                 if (crtcfb == crtc) {
1504                                         DRM_DEBUG_KMS("Using current fb for "
1505                                                         "setmode\n");
1506                                         fb = crtc->fb;
1507                                 }
1508                         }
1509                 } else {
1510                         obj = drm_mode_object_find(dev, crtc_req->fb_id,
1511                                                    DRM_MODE_OBJECT_FB);
1512                         if (!obj) {
1513                                 DRM_DEBUG_KMS("Unknown FB ID%d\n",
1514                                                 crtc_req->fb_id);
1515                                 ret = -EINVAL;
1516                                 goto out;
1517                         }
1518                         fb = obj_to_fb(obj);
1519                 }
1520
1521                 mode = drm_mode_create(dev);
1522                 drm_crtc_convert_umode(mode, &crtc_req->mode);
1523                 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1524         }
1525
1526         if (crtc_req->count_connectors == 0 && mode) {
1527                 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
1528                 ret = -EINVAL;
1529                 goto out;
1530         }
1531
1532         if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
1533                 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
1534                           crtc_req->count_connectors);
1535                 ret = -EINVAL;
1536                 goto out;
1537         }
1538
1539         if (crtc_req->count_connectors > 0) {
1540                 u32 out_id;
1541
1542                 /* Avoid unbounded kernel memory allocation */
1543                 if (crtc_req->count_connectors > config->num_connector) {
1544                         ret = -EINVAL;
1545                         goto out;
1546                 }
1547
1548                 connector_set = kmalloc(crtc_req->count_connectors *
1549                                         sizeof(struct drm_connector *),
1550                                         GFP_KERNEL);
1551                 if (!connector_set) {
1552                         ret = -ENOMEM;
1553                         goto out;
1554                 }
1555
1556                 for (i = 0; i < crtc_req->count_connectors; i++) {
1557                         set_connectors_ptr = (uint32_t *)(unsigned long)crtc_req->set_connectors_ptr;
1558                         if (get_user(out_id, &set_connectors_ptr[i])) {
1559                                 ret = -EFAULT;
1560                                 goto out;
1561                         }
1562
1563                         obj = drm_mode_object_find(dev, out_id,
1564                                                    DRM_MODE_OBJECT_CONNECTOR);
1565                         if (!obj) {
1566                                 DRM_DEBUG_KMS("Connector id %d unknown\n",
1567                                                 out_id);
1568                                 ret = -EINVAL;
1569                                 goto out;
1570                         }
1571                         connector = obj_to_connector(obj);
1572
1573                         connector_set[i] = connector;
1574                 }
1575         }
1576
1577         set.crtc = crtc;
1578         set.x = crtc_req->x;
1579         set.y = crtc_req->y;
1580         set.mode = mode;
1581         set.connectors = connector_set;
1582         set.num_connectors = crtc_req->count_connectors;
1583         set.fb = fb;
1584         ret = crtc->funcs->set_config(&set);
1585
1586 out:
1587         kfree(connector_set);
1588         mutex_unlock(&dev->mode_config.mutex);
1589         return ret;
1590 }
1591
1592 int drm_mode_cursor_ioctl(struct drm_device *dev,
1593                         void *data, struct drm_file *file_priv)
1594 {
1595         struct drm_mode_cursor *req = data;
1596         struct drm_mode_object *obj;
1597         struct drm_crtc *crtc;
1598         int ret = 0;
1599
1600         if (!req->flags) {
1601                 DRM_ERROR("no operation set\n");
1602                 return -EINVAL;
1603         }
1604
1605         mutex_lock(&dev->mode_config.mutex);
1606         obj = drm_mode_object_find(dev, req->crtc_id, DRM_MODE_OBJECT_CRTC);
1607         if (!obj) {
1608                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
1609                 ret = -EINVAL;
1610                 goto out;
1611         }
1612         crtc = obj_to_crtc(obj);
1613
1614         if (req->flags & DRM_MODE_CURSOR_BO) {
1615                 if (!crtc->funcs->cursor_set) {
1616                         DRM_ERROR("crtc does not support cursor\n");
1617                         ret = -ENXIO;
1618                         goto out;
1619                 }
1620                 /* Turns off the cursor if handle is 0 */
1621                 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
1622                                               req->width, req->height);
1623         }
1624
1625         if (req->flags & DRM_MODE_CURSOR_MOVE) {
1626                 if (crtc->funcs->cursor_move) {
1627                         ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
1628                 } else {
1629                         DRM_ERROR("crtc does not support cursor\n");
1630                         ret = -EFAULT;
1631                         goto out;
1632                 }
1633         }
1634 out:
1635         mutex_unlock(&dev->mode_config.mutex);
1636         return ret;
1637 }
1638
1639 /**
1640  * drm_mode_addfb - add an FB to the graphics configuration
1641  * @inode: inode from the ioctl
1642  * @filp: file * from the ioctl
1643  * @cmd: cmd from ioctl
1644  * @arg: arg from ioctl
1645  *
1646  * LOCKING:
1647  * Takes mode config lock.
1648  *
1649  * Add a new FB to the specified CRTC, given a user request.
1650  *
1651  * Called by the user via ioctl.
1652  *
1653  * RETURNS:
1654  * Zero on success, errno on failure.
1655  */
1656 int drm_mode_addfb(struct drm_device *dev,
1657                    void *data, struct drm_file *file_priv)
1658 {
1659         struct drm_mode_fb_cmd *r = data;
1660         struct drm_mode_config *config = &dev->mode_config;
1661         struct drm_framebuffer *fb;
1662         int ret = 0;
1663
1664         if ((config->min_width > r->width) || (r->width > config->max_width)) {
1665                 DRM_ERROR("mode new framebuffer width not within limits\n");
1666                 return -EINVAL;
1667         }
1668         if ((config->min_height > r->height) || (r->height > config->max_height)) {
1669                 DRM_ERROR("mode new framebuffer height not within limits\n");
1670                 return -EINVAL;
1671         }
1672
1673         mutex_lock(&dev->mode_config.mutex);
1674
1675         /* TODO check buffer is sufficently large */
1676         /* TODO setup destructor callback */
1677
1678         fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
1679         if (!fb) {
1680                 DRM_ERROR("could not create framebuffer\n");
1681                 ret = -EINVAL;
1682                 goto out;
1683         }
1684
1685         r->fb_id = fb->base.id;
1686         list_add(&fb->filp_head, &file_priv->fbs);
1687
1688 out:
1689         mutex_unlock(&dev->mode_config.mutex);
1690         return ret;
1691 }
1692
1693 /**
1694  * drm_mode_rmfb - remove an FB from the configuration
1695  * @inode: inode from the ioctl
1696  * @filp: file * from the ioctl
1697  * @cmd: cmd from ioctl
1698  * @arg: arg from ioctl
1699  *
1700  * LOCKING:
1701  * Takes mode config lock.
1702  *
1703  * Remove the FB specified by the user.
1704  *
1705  * Called by the user via ioctl.
1706  *
1707  * RETURNS:
1708  * Zero on success, errno on failure.
1709  */
1710 int drm_mode_rmfb(struct drm_device *dev,
1711                    void *data, struct drm_file *file_priv)
1712 {
1713         struct drm_mode_object *obj;
1714         struct drm_framebuffer *fb = NULL;
1715         struct drm_framebuffer *fbl = NULL;
1716         uint32_t *id = data;
1717         int ret = 0;
1718         int found = 0;
1719
1720         mutex_lock(&dev->mode_config.mutex);
1721         obj = drm_mode_object_find(dev, *id, DRM_MODE_OBJECT_FB);
1722         /* TODO check that we realy get a framebuffer back. */
1723         if (!obj) {
1724                 DRM_ERROR("mode invalid framebuffer id\n");
1725                 ret = -EINVAL;
1726                 goto out;
1727         }
1728         fb = obj_to_fb(obj);
1729
1730         list_for_each_entry(fbl, &file_priv->fbs, filp_head)
1731                 if (fb == fbl)
1732                         found = 1;
1733
1734         if (!found) {
1735                 DRM_ERROR("tried to remove a fb that we didn't own\n");
1736                 ret = -EINVAL;
1737                 goto out;
1738         }
1739
1740         /* TODO release all crtc connected to the framebuffer */
1741         /* TODO unhock the destructor from the buffer object */
1742
1743         list_del(&fb->filp_head);
1744         fb->funcs->destroy(fb);
1745
1746 out:
1747         mutex_unlock(&dev->mode_config.mutex);
1748         return ret;
1749 }
1750
1751 /**
1752  * drm_mode_getfb - get FB info
1753  * @inode: inode from the ioctl
1754  * @filp: file * from the ioctl
1755  * @cmd: cmd from ioctl
1756  * @arg: arg from ioctl
1757  *
1758  * LOCKING:
1759  * Caller? (FIXME)
1760  *
1761  * Lookup the FB given its ID and return info about it.
1762  *
1763  * Called by the user via ioctl.
1764  *
1765  * RETURNS:
1766  * Zero on success, errno on failure.
1767  */
1768 int drm_mode_getfb(struct drm_device *dev,
1769                    void *data, struct drm_file *file_priv)
1770 {
1771         struct drm_mode_fb_cmd *r = data;
1772         struct drm_mode_object *obj;
1773         struct drm_framebuffer *fb;
1774         int ret = 0;
1775
1776         mutex_lock(&dev->mode_config.mutex);
1777         obj = drm_mode_object_find(dev, r->fb_id, DRM_MODE_OBJECT_FB);
1778         if (!obj) {
1779                 DRM_ERROR("invalid framebuffer id\n");
1780                 ret = -EINVAL;
1781                 goto out;
1782         }
1783         fb = obj_to_fb(obj);
1784
1785         r->height = fb->height;
1786         r->width = fb->width;
1787         r->depth = fb->depth;
1788         r->bpp = fb->bits_per_pixel;
1789         r->pitch = fb->pitch;
1790         fb->funcs->create_handle(fb, file_priv, &r->handle);
1791
1792 out:
1793         mutex_unlock(&dev->mode_config.mutex);
1794         return ret;
1795 }
1796
1797 int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
1798                            void *data, struct drm_file *file_priv)
1799 {
1800         struct drm_clip_rect __user *clips_ptr;
1801         struct drm_clip_rect *clips = NULL;
1802         struct drm_mode_fb_dirty_cmd *r = data;
1803         struct drm_mode_object *obj;
1804         struct drm_framebuffer *fb;
1805         unsigned flags;
1806         int num_clips;
1807         int ret = 0;
1808
1809         mutex_lock(&dev->mode_config.mutex);
1810         obj = drm_mode_object_find(dev, r->fb_id, DRM_MODE_OBJECT_FB);
1811         if (!obj) {
1812                 DRM_ERROR("invalid framebuffer id\n");
1813                 ret = -EINVAL;
1814                 goto out_err1;
1815         }
1816         fb = obj_to_fb(obj);
1817
1818         num_clips = r->num_clips;
1819         clips_ptr = (struct drm_clip_rect *)(unsigned long)r->clips_ptr;
1820
1821         if (!num_clips != !clips_ptr) {
1822                 ret = -EINVAL;
1823                 goto out_err1;
1824         }
1825
1826         flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
1827
1828         /* If userspace annotates copy, clips must come in pairs */
1829         if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
1830                 ret = -EINVAL;
1831                 goto out_err1;
1832         }
1833
1834         if (num_clips && clips_ptr) {
1835                 clips = kzalloc(num_clips * sizeof(*clips), GFP_KERNEL);
1836                 if (!clips) {
1837                         ret = -ENOMEM;
1838                         goto out_err1;
1839                 }
1840
1841                 ret = copy_from_user(clips, clips_ptr,
1842                                      num_clips * sizeof(*clips));
1843                 if (ret)
1844                         goto out_err2;
1845         }
1846
1847         if (fb->funcs->dirty) {
1848                 ret = fb->funcs->dirty(fb, flags, r->color, clips, num_clips);
1849         } else {
1850                 ret = -ENOSYS;
1851                 goto out_err2;
1852         }
1853
1854 out_err2:
1855         kfree(clips);
1856 out_err1:
1857         mutex_unlock(&dev->mode_config.mutex);
1858         return ret;
1859 }
1860
1861
1862 /**
1863  * drm_fb_release - remove and free the FBs on this file
1864  * @filp: file * from the ioctl
1865  *
1866  * LOCKING:
1867  * Takes mode config lock.
1868  *
1869  * Destroy all the FBs associated with @filp.
1870  *
1871  * Called by the user via ioctl.
1872  *
1873  * RETURNS:
1874  * Zero on success, errno on failure.
1875  */
1876 void drm_fb_release(struct drm_file *priv)
1877 {
1878         struct drm_device *dev = priv->minor->dev;
1879         struct drm_framebuffer *fb, *tfb;
1880
1881         mutex_lock(&dev->mode_config.mutex);
1882         list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
1883                 list_del(&fb->filp_head);
1884                 fb->funcs->destroy(fb);
1885         }
1886         mutex_unlock(&dev->mode_config.mutex);
1887 }
1888
1889 /**
1890  * drm_mode_attachmode - add a mode to the user mode list
1891  * @dev: DRM device
1892  * @connector: connector to add the mode to
1893  * @mode: mode to add
1894  *
1895  * Add @mode to @connector's user mode list.
1896  */
1897 static int drm_mode_attachmode(struct drm_device *dev,
1898                                struct drm_connector *connector,
1899                                struct drm_display_mode *mode)
1900 {
1901         int ret = 0;
1902
1903         list_add_tail(&mode->head, &connector->user_modes);
1904         return ret;
1905 }
1906
1907 int drm_mode_attachmode_crtc(struct drm_device *dev, struct drm_crtc *crtc,
1908                              struct drm_display_mode *mode)
1909 {
1910         struct drm_connector *connector;
1911         int ret = 0;
1912         struct drm_display_mode *dup_mode;
1913         int need_dup = 0;
1914         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
1915                 if (!connector->encoder)
1916                         break;
1917                 if (connector->encoder->crtc == crtc) {
1918                         if (need_dup)
1919                                 dup_mode = drm_mode_duplicate(dev, mode);
1920                         else
1921                                 dup_mode = mode;
1922                         ret = drm_mode_attachmode(dev, connector, dup_mode);
1923                         if (ret)
1924                                 return ret;
1925                         need_dup = 1;
1926                 }
1927         }
1928         return 0;
1929 }
1930 EXPORT_SYMBOL(drm_mode_attachmode_crtc);
1931
1932 static int drm_mode_detachmode(struct drm_device *dev,
1933                                struct drm_connector *connector,
1934                                struct drm_display_mode *mode)
1935 {
1936         int found = 0;
1937         int ret = 0;
1938         struct drm_display_mode *match_mode, *t;
1939
1940         list_for_each_entry_safe(match_mode, t, &connector->user_modes, head) {
1941                 if (drm_mode_equal(match_mode, mode)) {
1942                         list_del(&match_mode->head);
1943                         drm_mode_destroy(dev, match_mode);
1944                         found = 1;
1945                         break;
1946                 }
1947         }
1948
1949         if (!found)
1950                 ret = -EINVAL;
1951
1952         return ret;
1953 }
1954
1955 int drm_mode_detachmode_crtc(struct drm_device *dev, struct drm_display_mode *mode)
1956 {
1957         struct drm_connector *connector;
1958
1959         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
1960                 drm_mode_detachmode(dev, connector, mode);
1961         }
1962         return 0;
1963 }
1964 EXPORT_SYMBOL(drm_mode_detachmode_crtc);
1965
1966 /**
1967  * drm_fb_attachmode - Attach a user mode to an connector
1968  * @inode: inode from the ioctl
1969  * @filp: file * from the ioctl
1970  * @cmd: cmd from ioctl
1971  * @arg: arg from ioctl
1972  *
1973  * This attaches a user specified mode to an connector.
1974  * Called by the user via ioctl.
1975  *
1976  * RETURNS:
1977  * Zero on success, errno on failure.
1978  */
1979 int drm_mode_attachmode_ioctl(struct drm_device *dev,
1980                               void *data, struct drm_file *file_priv)
1981 {
1982         struct drm_mode_mode_cmd *mode_cmd = data;
1983         struct drm_connector *connector;
1984         struct drm_display_mode *mode;
1985         struct drm_mode_object *obj;
1986         struct drm_mode_modeinfo *umode = &mode_cmd->mode;
1987         int ret = 0;
1988
1989         mutex_lock(&dev->mode_config.mutex);
1990
1991         obj = drm_mode_object_find(dev, mode_cmd->connector_id, DRM_MODE_OBJECT_CONNECTOR);
1992         if (!obj) {
1993                 ret = -EINVAL;
1994                 goto out;
1995         }
1996         connector = obj_to_connector(obj);
1997
1998         mode = drm_mode_create(dev);
1999         if (!mode) {
2000                 ret = -ENOMEM;
2001                 goto out;
2002         }
2003
2004         drm_crtc_convert_umode(mode, umode);
2005
2006         ret = drm_mode_attachmode(dev, connector, mode);
2007 out:
2008         mutex_unlock(&dev->mode_config.mutex);
2009         return ret;
2010 }
2011
2012
2013 /**
2014  * drm_fb_detachmode - Detach a user specified mode from an connector
2015  * @inode: inode from the ioctl
2016  * @filp: file * from the ioctl
2017  * @cmd: cmd from ioctl
2018  * @arg: arg from ioctl
2019  *
2020  * Called by the user via ioctl.
2021  *
2022  * RETURNS:
2023  * Zero on success, errno on failure.
2024  */
2025 int drm_mode_detachmode_ioctl(struct drm_device *dev,
2026                               void *data, struct drm_file *file_priv)
2027 {
2028         struct drm_mode_object *obj;
2029         struct drm_mode_mode_cmd *mode_cmd = data;
2030         struct drm_connector *connector;
2031         struct drm_display_mode mode;
2032         struct drm_mode_modeinfo *umode = &mode_cmd->mode;
2033         int ret = 0;
2034
2035         mutex_lock(&dev->mode_config.mutex);
2036
2037         obj = drm_mode_object_find(dev, mode_cmd->connector_id, DRM_MODE_OBJECT_CONNECTOR);
2038         if (!obj) {
2039                 ret = -EINVAL;
2040                 goto out;
2041         }
2042         connector = obj_to_connector(obj);
2043
2044         drm_crtc_convert_umode(&mode, umode);
2045         ret = drm_mode_detachmode(dev, connector, &mode);
2046 out:
2047         mutex_unlock(&dev->mode_config.mutex);
2048         return ret;
2049 }
2050
2051 struct drm_property *drm_property_create(struct drm_device *dev, int flags,
2052                                          const char *name, int num_values)
2053 {
2054         struct drm_property *property = NULL;
2055
2056         property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
2057         if (!property)
2058                 return NULL;
2059
2060         if (num_values) {
2061                 property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL);
2062                 if (!property->values)
2063                         goto fail;
2064         }
2065
2066         drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
2067         property->flags = flags;
2068         property->num_values = num_values;
2069         INIT_LIST_HEAD(&property->enum_blob_list);
2070
2071         if (name)
2072                 strncpy(property->name, name, DRM_PROP_NAME_LEN);
2073
2074         list_add_tail(&property->head, &dev->mode_config.property_list);
2075         return property;
2076 fail:
2077         kfree(property);
2078         return NULL;
2079 }
2080 EXPORT_SYMBOL(drm_property_create);
2081
2082 int drm_property_add_enum(struct drm_property *property, int index,
2083                           uint64_t value, const char *name)
2084 {
2085         struct drm_property_enum *prop_enum;
2086
2087         if (!(property->flags & DRM_MODE_PROP_ENUM))
2088                 return -EINVAL;
2089
2090         if (!list_empty(&property->enum_blob_list)) {
2091                 list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
2092                         if (prop_enum->value == value) {
2093                                 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
2094                                 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
2095                                 return 0;
2096                         }
2097                 }
2098         }
2099
2100         prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
2101         if (!prop_enum)
2102                 return -ENOMEM;
2103
2104         strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
2105         prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
2106         prop_enum->value = value;
2107
2108         property->values[index] = value;
2109         list_add_tail(&prop_enum->head, &property->enum_blob_list);
2110         return 0;
2111 }
2112 EXPORT_SYMBOL(drm_property_add_enum);
2113
2114 void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
2115 {
2116         struct drm_property_enum *prop_enum, *pt;
2117
2118         list_for_each_entry_safe(prop_enum, pt, &property->enum_blob_list, head) {
2119                 list_del(&prop_enum->head);
2120                 kfree(prop_enum);
2121         }
2122
2123         if (property->num_values)
2124                 kfree(property->values);
2125         drm_mode_object_put(dev, &property->base);
2126         list_del(&property->head);
2127         kfree(property);
2128 }
2129 EXPORT_SYMBOL(drm_property_destroy);
2130
2131 int drm_connector_attach_property(struct drm_connector *connector,
2132                                struct drm_property *property, uint64_t init_val)
2133 {
2134         int i;
2135
2136         for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
2137                 if (connector->property_ids[i] == 0) {
2138                         connector->property_ids[i] = property->base.id;
2139                         connector->property_values[i] = init_val;
2140                         break;
2141                 }
2142         }
2143
2144         if (i == DRM_CONNECTOR_MAX_PROPERTY)
2145                 return -EINVAL;
2146         return 0;
2147 }
2148 EXPORT_SYMBOL(drm_connector_attach_property);
2149
2150 int drm_connector_property_set_value(struct drm_connector *connector,
2151                                   struct drm_property *property, uint64_t value)
2152 {
2153         int i;
2154
2155         for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
2156                 if (connector->property_ids[i] == property->base.id) {
2157                         connector->property_values[i] = value;
2158                         break;
2159                 }
2160         }
2161
2162         if (i == DRM_CONNECTOR_MAX_PROPERTY)
2163                 return -EINVAL;
2164         return 0;
2165 }
2166 EXPORT_SYMBOL(drm_connector_property_set_value);
2167
2168 int drm_connector_property_get_value(struct drm_connector *connector,
2169                                   struct drm_property *property, uint64_t *val)
2170 {
2171         int i;
2172
2173         for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
2174                 if (connector->property_ids[i] == property->base.id) {
2175                         *val = connector->property_values[i];
2176                         break;
2177                 }
2178         }
2179
2180         if (i == DRM_CONNECTOR_MAX_PROPERTY)
2181                 return -EINVAL;
2182         return 0;
2183 }
2184 EXPORT_SYMBOL(drm_connector_property_get_value);
2185
2186 int drm_mode_getproperty_ioctl(struct drm_device *dev,
2187                                void *data, struct drm_file *file_priv)
2188 {
2189         struct drm_mode_object *obj;
2190         struct drm_mode_get_property *out_resp = data;
2191         struct drm_property *property;
2192         int enum_count = 0;
2193         int blob_count = 0;
2194         int value_count = 0;
2195         int ret = 0, i;
2196         int copied;
2197         struct drm_property_enum *prop_enum;
2198         struct drm_mode_property_enum __user *enum_ptr;
2199         struct drm_property_blob *prop_blob;
2200         uint32_t *blob_id_ptr;
2201         uint64_t __user *values_ptr;
2202         uint32_t __user *blob_length_ptr;
2203
2204         mutex_lock(&dev->mode_config.mutex);
2205         obj = drm_mode_object_find(dev, out_resp->prop_id, DRM_MODE_OBJECT_PROPERTY);
2206         if (!obj) {
2207                 ret = -EINVAL;
2208                 goto done;
2209         }
2210         property = obj_to_property(obj);
2211
2212         if (property->flags & DRM_MODE_PROP_ENUM) {
2213                 list_for_each_entry(prop_enum, &property->enum_blob_list, head)
2214                         enum_count++;
2215         } else if (property->flags & DRM_MODE_PROP_BLOB) {
2216                 list_for_each_entry(prop_blob, &property->enum_blob_list, head)
2217                         blob_count++;
2218         }
2219
2220         value_count = property->num_values;
2221
2222         strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
2223         out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
2224         out_resp->flags = property->flags;
2225
2226         if ((out_resp->count_values >= value_count) && value_count) {
2227                 values_ptr = (uint64_t *)(unsigned long)out_resp->values_ptr;
2228                 for (i = 0; i < value_count; i++) {
2229                         if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
2230                                 ret = -EFAULT;
2231                                 goto done;
2232                         }
2233                 }
2234         }
2235         out_resp->count_values = value_count;
2236
2237         if (property->flags & DRM_MODE_PROP_ENUM) {
2238                 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
2239                         copied = 0;
2240                         enum_ptr = (struct drm_mode_property_enum *)(unsigned long)out_resp->enum_blob_ptr;
2241                         list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
2242
2243                                 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
2244                                         ret = -EFAULT;
2245                                         goto done;
2246                                 }
2247
2248                                 if (copy_to_user(&enum_ptr[copied].name,
2249                                                  &prop_enum->name, DRM_PROP_NAME_LEN)) {
2250                                         ret = -EFAULT;
2251                                         goto done;
2252                                 }
2253                                 copied++;
2254                         }
2255                 }
2256                 out_resp->count_enum_blobs = enum_count;
2257         }
2258
2259         if (property->flags & DRM_MODE_PROP_BLOB) {
2260                 if ((out_resp->count_enum_blobs >= blob_count) && blob_count) {
2261                         copied = 0;
2262                         blob_id_ptr = (uint32_t *)(unsigned long)out_resp->enum_blob_ptr;
2263                         blob_length_ptr = (uint32_t *)(unsigned long)out_resp->values_ptr;
2264
2265                         list_for_each_entry(prop_blob, &property->enum_blob_list, head) {
2266                                 if (put_user(prop_blob->base.id, blob_id_ptr + copied)) {
2267                                         ret = -EFAULT;
2268                                         goto done;
2269                                 }
2270
2271                                 if (put_user(prop_blob->length, blob_length_ptr + copied)) {
2272                                         ret = -EFAULT;
2273                                         goto done;
2274                                 }
2275
2276                                 copied++;
2277                         }
2278                 }
2279                 out_resp->count_enum_blobs = blob_count;
2280         }
2281 done:
2282         mutex_unlock(&dev->mode_config.mutex);
2283         return ret;
2284 }
2285
2286 static struct drm_property_blob *drm_property_create_blob(struct drm_device *dev, int length,
2287                                                           void *data)
2288 {
2289         struct drm_property_blob *blob;
2290
2291         if (!length || !data)
2292                 return NULL;
2293
2294         blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
2295         if (!blob)
2296                 return NULL;
2297
2298         blob->data = (void *)((char *)blob + sizeof(struct drm_property_blob));
2299         blob->length = length;
2300
2301         memcpy(blob->data, data, length);
2302
2303         drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
2304
2305         list_add_tail(&blob->head, &dev->mode_config.property_blob_list);
2306         return blob;
2307 }
2308
2309 static void drm_property_destroy_blob(struct drm_device *dev,
2310                                struct drm_property_blob *blob)
2311 {
2312         drm_mode_object_put(dev, &blob->base);
2313         list_del(&blob->head);
2314         kfree(blob);
2315 }
2316
2317 int drm_mode_getblob_ioctl(struct drm_device *dev,
2318                            void *data, struct drm_file *file_priv)
2319 {
2320         struct drm_mode_object *obj;
2321         struct drm_mode_get_blob *out_resp = data;
2322         struct drm_property_blob *blob;
2323         int ret = 0;
2324         void *blob_ptr;
2325
2326         mutex_lock(&dev->mode_config.mutex);
2327         obj = drm_mode_object_find(dev, out_resp->blob_id, DRM_MODE_OBJECT_BLOB);
2328         if (!obj) {
2329                 ret = -EINVAL;
2330                 goto done;
2331         }
2332         blob = obj_to_blob(obj);
2333
2334         if (out_resp->length == blob->length) {
2335                 blob_ptr = (void *)(unsigned long)out_resp->data;
2336                 if (copy_to_user(blob_ptr, blob->data, blob->length)){
2337                         ret = -EFAULT;
2338                         goto done;
2339                 }
2340         }
2341         out_resp->length = blob->length;
2342
2343 done:
2344         mutex_unlock(&dev->mode_config.mutex);
2345         return ret;
2346 }
2347
2348 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
2349                                             struct edid *edid)
2350 {
2351         struct drm_device *dev = connector->dev;
2352         int ret = 0;
2353
2354         if (connector->edid_blob_ptr)
2355                 drm_property_destroy_blob(dev, connector->edid_blob_ptr);
2356
2357         /* Delete edid, when there is none. */
2358         if (!edid) {
2359                 connector->edid_blob_ptr = NULL;
2360                 ret = drm_connector_property_set_value(connector, dev->mode_config.edid_property, 0);
2361                 return ret;
2362         }
2363
2364         connector->edid_blob_ptr = drm_property_create_blob(connector->dev, 128, edid);
2365
2366         ret = drm_connector_property_set_value(connector,
2367                                                dev->mode_config.edid_property,
2368                                                connector->edid_blob_ptr->base.id);
2369
2370         return ret;
2371 }
2372 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
2373
2374 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
2375                                        void *data, struct drm_file *file_priv)
2376 {
2377         struct drm_mode_connector_set_property *out_resp = data;
2378         struct drm_mode_object *obj;
2379         struct drm_property *property;
2380         struct drm_connector *connector;
2381         int ret = -EINVAL;
2382         int i;
2383
2384         mutex_lock(&dev->mode_config.mutex);
2385
2386         obj = drm_mode_object_find(dev, out_resp->connector_id, DRM_MODE_OBJECT_CONNECTOR);
2387         if (!obj) {
2388                 goto out;
2389         }
2390         connector = obj_to_connector(obj);
2391
2392         for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
2393                 if (connector->property_ids[i] == out_resp->prop_id)
2394                         break;
2395         }
2396
2397         if (i == DRM_CONNECTOR_MAX_PROPERTY) {
2398                 goto out;
2399         }
2400
2401         obj = drm_mode_object_find(dev, out_resp->prop_id, DRM_MODE_OBJECT_PROPERTY);
2402         if (!obj) {
2403                 goto out;
2404         }
2405         property = obj_to_property(obj);
2406
2407         if (property->flags & DRM_MODE_PROP_IMMUTABLE)
2408                 goto out;
2409
2410         if (property->flags & DRM_MODE_PROP_RANGE) {
2411                 if (out_resp->value < property->values[0])
2412                         goto out;
2413
2414                 if (out_resp->value > property->values[1])
2415                         goto out;
2416         } else {
2417                 int found = 0;
2418                 for (i = 0; i < property->num_values; i++) {
2419                         if (property->values[i] == out_resp->value) {
2420                                 found = 1;
2421                                 break;
2422                         }
2423                 }
2424                 if (!found) {
2425                         goto out;
2426                 }
2427         }
2428
2429         /* Do DPMS ourselves */
2430         if (property == connector->dev->mode_config.dpms_property) {
2431                 if (connector->funcs->dpms)
2432                         (*connector->funcs->dpms)(connector, (int) out_resp->value);
2433                 ret = 0;
2434         } else if (connector->funcs->set_property)
2435                 ret = connector->funcs->set_property(connector, property, out_resp->value);
2436
2437         /* store the property value if successful */
2438         if (!ret)
2439                 drm_connector_property_set_value(connector, property, out_resp->value);
2440 out:
2441         mutex_unlock(&dev->mode_config.mutex);
2442         return ret;
2443 }
2444
2445 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
2446                                       struct drm_encoder *encoder)
2447 {
2448         int i;
2449
2450         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
2451                 if (connector->encoder_ids[i] == 0) {
2452                         connector->encoder_ids[i] = encoder->base.id;
2453                         return 0;
2454                 }
2455         }
2456         return -ENOMEM;
2457 }
2458 EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
2459
2460 void drm_mode_connector_detach_encoder(struct drm_connector *connector,
2461                                     struct drm_encoder *encoder)
2462 {
2463         int i;
2464         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
2465                 if (connector->encoder_ids[i] == encoder->base.id) {
2466                         connector->encoder_ids[i] = 0;
2467                         if (connector->encoder == encoder)
2468                                 connector->encoder = NULL;
2469                         break;
2470                 }
2471         }
2472 }
2473 EXPORT_SYMBOL(drm_mode_connector_detach_encoder);
2474
2475 bool drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
2476                                   int gamma_size)
2477 {
2478         crtc->gamma_size = gamma_size;
2479
2480         crtc->gamma_store = kzalloc(gamma_size * sizeof(uint16_t) * 3, GFP_KERNEL);
2481         if (!crtc->gamma_store) {
2482                 crtc->gamma_size = 0;
2483                 return false;
2484         }
2485
2486         return true;
2487 }
2488 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
2489
2490 int drm_mode_gamma_set_ioctl(struct drm_device *dev,
2491                              void *data, struct drm_file *file_priv)
2492 {
2493         struct drm_mode_crtc_lut *crtc_lut = data;
2494         struct drm_mode_object *obj;
2495         struct drm_crtc *crtc;
2496         void *r_base, *g_base, *b_base;
2497         int size;
2498         int ret = 0;
2499
2500         mutex_lock(&dev->mode_config.mutex);
2501         obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
2502         if (!obj) {
2503                 ret = -EINVAL;
2504                 goto out;
2505         }
2506         crtc = obj_to_crtc(obj);
2507
2508         /* memcpy into gamma store */
2509         if (crtc_lut->gamma_size != crtc->gamma_size) {
2510                 ret = -EINVAL;
2511                 goto out;
2512         }
2513
2514         size = crtc_lut->gamma_size * (sizeof(uint16_t));
2515         r_base = crtc->gamma_store;
2516         if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
2517                 ret = -EFAULT;
2518                 goto out;
2519         }
2520
2521         g_base = r_base + size;
2522         if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
2523                 ret = -EFAULT;
2524                 goto out;
2525         }
2526
2527         b_base = g_base + size;
2528         if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
2529                 ret = -EFAULT;
2530                 goto out;
2531         }
2532
2533         crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size);
2534
2535 out:
2536         mutex_unlock(&dev->mode_config.mutex);
2537         return ret;
2538
2539 }
2540
2541 int drm_mode_gamma_get_ioctl(struct drm_device *dev,
2542                              void *data, struct drm_file *file_priv)
2543 {
2544         struct drm_mode_crtc_lut *crtc_lut = data;
2545         struct drm_mode_object *obj;
2546         struct drm_crtc *crtc;
2547         void *r_base, *g_base, *b_base;
2548         int size;
2549         int ret = 0;
2550
2551         mutex_lock(&dev->mode_config.mutex);
2552         obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
2553         if (!obj) {
2554                 ret = -EINVAL;
2555                 goto out;
2556         }
2557         crtc = obj_to_crtc(obj);
2558
2559         /* memcpy into gamma store */
2560         if (crtc_lut->gamma_size != crtc->gamma_size) {
2561                 ret = -EINVAL;
2562                 goto out;
2563         }
2564
2565         size = crtc_lut->gamma_size * (sizeof(uint16_t));
2566         r_base = crtc->gamma_store;
2567         if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
2568                 ret = -EFAULT;
2569                 goto out;
2570         }
2571
2572         g_base = r_base + size;
2573         if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
2574                 ret = -EFAULT;
2575                 goto out;
2576         }
2577
2578         b_base = g_base + size;
2579         if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
2580                 ret = -EFAULT;
2581                 goto out;
2582         }
2583 out:
2584         mutex_unlock(&dev->mode_config.mutex);
2585         return ret;
2586 }
2587
2588 int drm_mode_page_flip_ioctl(struct drm_device *dev,
2589                              void *data, struct drm_file *file_priv)
2590 {
2591         struct drm_mode_crtc_page_flip *page_flip = data;
2592         struct drm_mode_object *obj;
2593         struct drm_crtc *crtc;
2594         struct drm_framebuffer *fb;
2595         struct drm_pending_vblank_event *e = NULL;
2596         unsigned long flags;
2597         int ret = -EINVAL;
2598
2599         if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
2600             page_flip->reserved != 0)
2601                 return -EINVAL;
2602
2603         mutex_lock(&dev->mode_config.mutex);
2604         obj = drm_mode_object_find(dev, page_flip->crtc_id, DRM_MODE_OBJECT_CRTC);
2605         if (!obj)
2606                 goto out;
2607         crtc = obj_to_crtc(obj);
2608
2609         if (crtc->funcs->page_flip == NULL)
2610                 goto out;
2611
2612         obj = drm_mode_object_find(dev, page_flip->fb_id, DRM_MODE_OBJECT_FB);
2613         if (!obj)
2614                 goto out;
2615         fb = obj_to_fb(obj);
2616
2617         if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
2618                 ret = -ENOMEM;
2619                 spin_lock_irqsave(&dev->event_lock, flags);
2620                 if (file_priv->event_space < sizeof e->event) {
2621                         spin_unlock_irqrestore(&dev->event_lock, flags);
2622                         goto out;
2623                 }
2624                 file_priv->event_space -= sizeof e->event;
2625                 spin_unlock_irqrestore(&dev->event_lock, flags);
2626
2627                 e = kzalloc(sizeof *e, GFP_KERNEL);
2628                 if (e == NULL) {
2629                         spin_lock_irqsave(&dev->event_lock, flags);
2630                         file_priv->event_space += sizeof e->event;
2631                         spin_unlock_irqrestore(&dev->event_lock, flags);
2632                         goto out;
2633                 }
2634
2635                 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
2636                 e->event.base.length = sizeof e->event;
2637                 e->event.user_data = page_flip->user_data;
2638                 e->base.event = &e->event.base;
2639                 e->base.file_priv = file_priv;
2640                 e->base.destroy =
2641                         (void (*) (struct drm_pending_event *)) kfree;
2642         }
2643
2644         ret = crtc->funcs->page_flip(crtc, fb, e);
2645         if (ret) {
2646                 spin_lock_irqsave(&dev->event_lock, flags);
2647                 file_priv->event_space += sizeof e->event;
2648                 spin_unlock_irqrestore(&dev->event_lock, flags);
2649                 kfree(e);
2650         }
2651
2652 out:
2653         mutex_unlock(&dev->mode_config.mutex);
2654         return ret;
2655 }