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1 /*
2  * \file xf86drmMode.c
3  * Header for DRM modesetting interface.
4  *
5  * \author Jakob Bornecrantz <wallbraker@gmail.com>
6  *
7  * \par Acknowledgements:
8  * Feb 2007, Dave Airlie <airlied@linux.ie>
9  */
11 /*
12  * Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
13  * Copyright (c) 2007-2008 Dave Airlie <airlied@linux.ie>
14  * Copyright (c) 2007-2008 Jakob Bornecrantz <wallbraker@gmail.com>
15  *
16  * Permission is hereby granted, free of charge, to any person obtaining a
17  * copy of this software and associated documentation files (the "Software"),
18  * to deal in the Software without restriction, including without limitation
19  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20  * and/or sell copies of the Software, and to permit persons to whom the
21  * Software is furnished to do so, subject to the following conditions:
22  *
23  * The above copyright notice and this permission notice shall be included in
24  * all copies or substantial portions of the Software.
25  *
26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
29  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
30  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
31  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
32  * IN THE SOFTWARE.
33  *
34  */
36 /*
37  * TODO the types we are after are defined in diffrent headers on diffrent
38  * platforms find which headers to include to get uint32_t
39  */
40 #include <stdint.h>
41 #include <sys/ioctl.h>
42 #include <stdio.h>
44 #include "xf86drmMode.h"
45 #include "xf86drm.h"
46 #include <drm.h>
47 #include <string.h>
48 #include <dirent.h>
49 #include <unistd.h>
50 #include <errno.h>
52 #define U642VOID(x) ((void *)(unsigned long)(x))
53 #define VOID2U64(x) ((uint64_t)(unsigned long)(x))
55 /*
56  * Util functions
57  */
59 void* drmAllocCpy(void *array, int count, int entry_size)
60 {
61         char *r;
62         int i;
64         if (!count || !array || !entry_size)
65                 return 0;
67         if (!(r = drmMalloc(count*entry_size)))
68                 return 0;
70         for (i = 0; i < count; i++)
71                 memcpy(r+(entry_size*i), array+(entry_size*i), entry_size);
73         return r;
74 }
76 /*
77  * A couple of free functions.
78  */
80 void drmModeFreeModeInfo(drmModeModeInfoPtr ptr)
81 {
82         if (!ptr)
83                 return;
85         drmFree(ptr);
86 }
88 void drmModeFreeResources(drmModeResPtr ptr)
89 {
90         if (!ptr)
91                 return;
93         drmFree(ptr);
95 }
97 void drmModeFreeFB(drmModeFBPtr ptr)
98 {
99         if (!ptr)
100                 return;
102         /* we might add more frees later. */
103         drmFree(ptr);
106 void drmModeFreeCrtc(drmModeCrtcPtr ptr)
108         if (!ptr)
109                 return;
111         drmFree(ptr);
115 void drmModeFreeConnector(drmModeConnectorPtr ptr)
117         if (!ptr)
118                 return;
120         drmFree(ptr->encoders);
121         drmFree(ptr->prop_values);
122         drmFree(ptr->props);
123         drmFree(ptr->modes);
124         drmFree(ptr);
128 void drmModeFreeEncoder(drmModeEncoderPtr ptr)
130         drmFree(ptr);
133 /*
134  * ModeSetting functions.
135  */
137 drmModeResPtr drmModeGetResources(int fd)
139         struct drm_mode_card_res res, counts;
140         drmModeResPtr r = 0;
142 retry:
143         memset(&res, 0, sizeof(struct drm_mode_card_res));
144         if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res))
145                 return 0;
147         counts = res;
149         if (res.count_fbs) {
150                 res.fb_id_ptr = VOID2U64(drmMalloc(res.count_fbs*sizeof(uint32_t)));
151                 if (!res.fb_id_ptr)
152                         goto err_allocs;
153         }
154         if (res.count_crtcs) {
155                 res.crtc_id_ptr = VOID2U64(drmMalloc(res.count_crtcs*sizeof(uint32_t)));
156                 if (!res.crtc_id_ptr)
157                         goto err_allocs;
158         }
159         if (res.count_connectors) {
160                 res.connector_id_ptr = VOID2U64(drmMalloc(res.count_connectors*sizeof(uint32_t)));
161                 if (!res.connector_id_ptr)
162                         goto err_allocs;
163         }
164         if (res.count_encoders) {
165                 res.encoder_id_ptr = VOID2U64(drmMalloc(res.count_encoders*sizeof(uint32_t)));
166                 if (!res.encoder_id_ptr)
167                         goto err_allocs;
168         }
170         if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res))
171                 goto err_allocs;
173         /* The number of available connectors and etc may have changed with a
174          * hotplug event in between the ioctls, in which case the field is
175          * silently ignored by the kernel.
176          */
177         if (counts.count_fbs < res.count_fbs ||
178             counts.count_crtcs < res.count_crtcs ||
179             counts.count_connectors < res.count_connectors ||
180             counts.count_encoders < res.count_encoders)
181         {
182                 drmFree(U642VOID(res.fb_id_ptr));
183                 drmFree(U642VOID(res.crtc_id_ptr));
184                 drmFree(U642VOID(res.connector_id_ptr));
185                 drmFree(U642VOID(res.encoder_id_ptr));
187                 goto retry;
188         }
190         /*
191          * return
192          */
193         if (!(r = drmMalloc(sizeof(*r))))
194                 goto err_allocs;
196         r->min_width     = res.min_width;
197         r->max_width     = res.max_width;
198         r->min_height    = res.min_height;
199         r->max_height    = res.max_height;
200         r->count_fbs     = res.count_fbs;
201         r->count_crtcs   = res.count_crtcs;
202         r->count_connectors = res.count_connectors;
203         r->count_encoders = res.count_encoders;
205         r->fbs        = drmAllocCpy(U642VOID(res.fb_id_ptr), res.count_fbs, sizeof(uint32_t));
206         r->crtcs      = drmAllocCpy(U642VOID(res.crtc_id_ptr), res.count_crtcs, sizeof(uint32_t));
207         r->connectors = drmAllocCpy(U642VOID(res.connector_id_ptr), res.count_connectors, sizeof(uint32_t));
208         r->encoders   = drmAllocCpy(U642VOID(res.encoder_id_ptr), res.count_encoders, sizeof(uint32_t));
209         if ((res.count_fbs && !r->fbs) ||
210             (res.count_crtcs && !r->crtcs) ||
211             (res.count_connectors && !r->connectors) ||
212             (res.count_encoders && !r->encoders))
213         {
214                 drmFree(r->fbs);
215                 drmFree(r->crtcs);
216                 drmFree(r->connectors);
217                 drmFree(r->encoders);
218                 drmFree(r);
219                 r = 0;
220         }
222 err_allocs:
223         drmFree(U642VOID(res.fb_id_ptr));
224         drmFree(U642VOID(res.crtc_id_ptr));
225         drmFree(U642VOID(res.connector_id_ptr));
226         drmFree(U642VOID(res.encoder_id_ptr));
228         return r;
231 int drmModeAddFB(int fd, uint32_t width, uint32_t height, uint8_t depth,
232                  uint8_t bpp, uint32_t pitch, uint32_t bo_handle,
233                  uint32_t *buf_id)
235         struct drm_mode_fb_cmd f;
236         int ret;
238         f.width  = width;
239         f.height = height;
240         f.pitch  = pitch;
241         f.bpp    = bpp;
242         f.depth  = depth;
243         f.handle = bo_handle;
245         if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_ADDFB, &f)))
246                 return ret;
248         *buf_id = f.fb_id;
249         return 0;
252 int drmModeRmFB(int fd, uint32_t bufferId)
254         return drmIoctl(fd, DRM_IOCTL_MODE_RMFB, &bufferId);
259 drmModeFBPtr drmModeGetFB(int fd, uint32_t buf)
261         struct drm_mode_fb_cmd info;
262         drmModeFBPtr r;
264         info.fb_id = buf;
266         if (drmIoctl(fd, DRM_IOCTL_MODE_GETFB, &info))
267                 return NULL;
269         if (!(r = drmMalloc(sizeof(*r))))
270                 return NULL;
272         r->fb_id = info.fb_id;
273         r->width = info.width;
274         r->height = info.height;
275         r->pitch = info.pitch;
276         r->bpp = info.bpp;
277         r->handle = info.handle;
278         r->depth = info.depth;
280         return r;
283 int drmModeDirtyFB(int fd, uint32_t bufferId,
284                    drmModeClipPtr clips, uint32_t num_clips)
286         struct drm_mode_fb_dirty_cmd dirty = { 0 };
288         dirty.fb_id = bufferId;
289         dirty.clips_ptr = VOID2U64(clips);
290         dirty.num_clips = num_clips;
292         return drmIoctl(fd, DRM_IOCTL_MODE_DIRTYFB, &dirty);
296 /*
297  * Crtc functions
298  */
300 drmModeCrtcPtr drmModeGetCrtc(int fd, uint32_t crtcId)
302         struct drm_mode_crtc crtc;
303         drmModeCrtcPtr r;
305         crtc.crtc_id = crtcId;
307         if (drmIoctl(fd, DRM_IOCTL_MODE_GETCRTC, &crtc))
308                 return 0;
310         /*
311          * return
312          */
314         if (!(r = drmMalloc(sizeof(*r))))
315                 return 0;
317         r->crtc_id         = crtc.crtc_id;
318         r->x               = crtc.x;
319         r->y               = crtc.y;
320         r->mode_valid      = crtc.mode_valid;
321         if (r->mode_valid)
322                 memcpy(&r->mode, &crtc.mode, sizeof(struct drm_mode_modeinfo));
323         r->buffer_id       = crtc.fb_id;
324         r->gamma_size      = crtc.gamma_size;
325         return r;
329 int drmModeSetCrtc(int fd, uint32_t crtcId, uint32_t bufferId,
330                    uint32_t x, uint32_t y, uint32_t *connectors, int count,
331                    drmModeModeInfoPtr mode)
333         struct drm_mode_crtc crtc;
335         crtc.x             = x;
336         crtc.y             = y;
337         crtc.crtc_id       = crtcId;
338         crtc.fb_id         = bufferId;
339         crtc.set_connectors_ptr = VOID2U64(connectors);
340         crtc.count_connectors = count;
341         if (mode) {
342           memcpy(&crtc.mode, mode, sizeof(struct drm_mode_modeinfo));
343           crtc.mode_valid = 1;
344         } else
345           crtc.mode_valid = 0;
347         return drmIoctl(fd, DRM_IOCTL_MODE_SETCRTC, &crtc);
350 /*
351  * Cursor manipulation
352  */
354 int drmModeSetCursor(int fd, uint32_t crtcId, uint32_t bo_handle, uint32_t width, uint32_t height)
356         struct drm_mode_cursor arg;
358         arg.flags = DRM_MODE_CURSOR_BO;
359         arg.crtc_id = crtcId;
360         arg.width = width;
361         arg.height = height;
362         arg.handle = bo_handle;
364         return drmIoctl(fd, DRM_IOCTL_MODE_CURSOR, &arg);
367 int drmModeMoveCursor(int fd, uint32_t crtcId, int x, int y)
369         struct drm_mode_cursor arg;
371         arg.flags = DRM_MODE_CURSOR_MOVE;
372         arg.crtc_id = crtcId;
373         arg.x = x;
374         arg.y = y;
376         return drmIoctl(fd, DRM_IOCTL_MODE_CURSOR, &arg);
379 /*
380  * Encoder get
381  */
382 drmModeEncoderPtr drmModeGetEncoder(int fd, uint32_t encoder_id)
384         struct drm_mode_get_encoder enc;
385         drmModeEncoderPtr r = NULL;
387         enc.encoder_id = encoder_id;
388         enc.encoder_type = 0;
389         enc.possible_crtcs = 0;
390         enc.possible_clones = 0;
392         if (drmIoctl(fd, DRM_IOCTL_MODE_GETENCODER, &enc))
393                 return 0;
395         if (!(r = drmMalloc(sizeof(*r))))
396                 return 0;
398         r->encoder_id = enc.encoder_id;
399         r->crtc_id = enc.crtc_id;
400         r->encoder_type = enc.encoder_type;
401         r->possible_crtcs = enc.possible_crtcs;
402         r->possible_clones = enc.possible_clones;
404         return r;
407 /*
408  * Connector manipulation
409  */
411 drmModeConnectorPtr drmModeGetConnector(int fd, uint32_t connector_id)
413         struct drm_mode_get_connector conn, counts;
414         drmModeConnectorPtr r = NULL;
416 retry:
417         memset(&conn, 0, sizeof(struct drm_mode_get_connector));
418         conn.connector_id = connector_id;
420         if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
421                 return 0;
423         counts = conn;
425         if (conn.count_props) {
426                 conn.props_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint32_t)));
427                 if (!conn.props_ptr)
428                         goto err_allocs;
429                 conn.prop_values_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint64_t)));
430                 if (!conn.prop_values_ptr)
431                         goto err_allocs;
432         }
434         if (conn.count_modes) {
435                 conn.modes_ptr = VOID2U64(drmMalloc(conn.count_modes*sizeof(struct drm_mode_modeinfo)));
436                 if (!conn.modes_ptr)
437                         goto err_allocs;
438         }
440         if (conn.count_encoders) {
441                 conn.encoders_ptr = VOID2U64(drmMalloc(conn.count_encoders*sizeof(uint32_t)));
442                 if (!conn.encoders_ptr)
443                         goto err_allocs;
444         }
446         if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
447                 goto err_allocs;
449         /* The number of available connectors and etc may have changed with a
450          * hotplug event in between the ioctls, in which case the field is
451          * silently ignored by the kernel.
452          */
453         if (counts.count_props < conn.count_props ||
454             counts.count_modes < conn.count_modes ||
455             counts.count_encoders < conn.count_encoders) {
456                 drmFree(U642VOID(conn.props_ptr));
457                 drmFree(U642VOID(conn.prop_values_ptr));
458                 drmFree(U642VOID(conn.modes_ptr));
459                 drmFree(U642VOID(conn.encoders_ptr));
461                 goto retry;
462         }
464         if(!(r = drmMalloc(sizeof(*r)))) {
465                 goto err_allocs;
466         }
468         r->connector_id = conn.connector_id;
469         r->encoder_id = conn.encoder_id;
470         r->connection   = conn.connection;
471         r->mmWidth      = conn.mm_width;
472         r->mmHeight     = conn.mm_height;
473         /* convert subpixel from kernel to userspace */
474         r->subpixel     = conn.subpixel + 1;
475         r->count_modes  = conn.count_modes;
476         r->count_props  = conn.count_props;
477         r->props        = drmAllocCpy(U642VOID(conn.props_ptr), conn.count_props, sizeof(uint32_t));
478         r->prop_values  = drmAllocCpy(U642VOID(conn.prop_values_ptr), conn.count_props, sizeof(uint64_t));
479         r->modes        = drmAllocCpy(U642VOID(conn.modes_ptr), conn.count_modes, sizeof(struct drm_mode_modeinfo));
480         r->count_encoders = conn.count_encoders;
481         r->encoders     = drmAllocCpy(U642VOID(conn.encoders_ptr), conn.count_encoders, sizeof(uint32_t));
482         r->connector_type  = conn.connector_type;
483         r->connector_type_id = conn.connector_type_id;
485         if ((r->count_props && !r->props) ||
486             (r->count_props && !r->prop_values) ||
487             (r->count_modes && !r->modes) ||
488             (r->count_encoders && !r->encoders)) {
489                 drmFree(r->props);
490                 drmFree(r->prop_values);
491                 drmFree(r->modes);
492                 drmFree(r->encoders);
493                 drmFree(r);
494                 r = 0;
495         }
497 err_allocs:
498         drmFree(U642VOID(conn.prop_values_ptr));
499         drmFree(U642VOID(conn.props_ptr));
500         drmFree(U642VOID(conn.modes_ptr));
501         drmFree(U642VOID(conn.encoders_ptr));
503         return r;
506 int drmModeAttachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_info)
508         struct drm_mode_mode_cmd res;
510         memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
511         res.connector_id = connector_id;
513         return drmIoctl(fd, DRM_IOCTL_MODE_ATTACHMODE, &res);
516 int drmModeDetachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_info)
518         struct drm_mode_mode_cmd res;
520         memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
521         res.connector_id = connector_id;
523         return drmIoctl(fd, DRM_IOCTL_MODE_DETACHMODE, &res);
527 drmModePropertyPtr drmModeGetProperty(int fd, uint32_t property_id)
529         struct drm_mode_get_property prop;
530         drmModePropertyPtr r;
532         prop.prop_id = property_id;
533         prop.count_enum_blobs = 0;
534         prop.count_values = 0;
535         prop.flags = 0;
536         prop.enum_blob_ptr = 0;
537         prop.values_ptr = 0;
539         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPERTY, &prop))
540                 return 0;
542         if (prop.count_values)
543                 prop.values_ptr = VOID2U64(drmMalloc(prop.count_values * sizeof(uint64_t)));
545         if (prop.count_enum_blobs && (prop.flags & DRM_MODE_PROP_ENUM))
546                 prop.enum_blob_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(struct drm_mode_property_enum)));
548         if (prop.count_enum_blobs && (prop.flags & DRM_MODE_PROP_BLOB)) {
549                 prop.values_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(uint32_t)));
550                 prop.enum_blob_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(uint32_t)));
551         }
553         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPERTY, &prop)) {
554                 r = NULL;
555                 goto err_allocs;
556         }
558         if (!(r = drmMalloc(sizeof(*r))))
559                 return NULL;
561         r->prop_id = prop.prop_id;
562         r->count_values = prop.count_values;
564         r->flags = prop.flags;
565         if (prop.count_values)
566                 r->values = drmAllocCpy(U642VOID(prop.values_ptr), prop.count_values, sizeof(uint64_t));
567         if (prop.flags & DRM_MODE_PROP_ENUM) {
568                 r->count_enums = prop.count_enum_blobs;
569                 r->enums = drmAllocCpy(U642VOID(prop.enum_blob_ptr), prop.count_enum_blobs, sizeof(struct drm_mode_property_enum));
570         } else if (prop.flags & DRM_MODE_PROP_BLOB) {
571                 r->values = drmAllocCpy(U642VOID(prop.values_ptr), prop.count_enum_blobs, sizeof(uint32_t));
572                 r->blob_ids = drmAllocCpy(U642VOID(prop.enum_blob_ptr), prop.count_enum_blobs, sizeof(uint32_t));
573                 r->count_blobs = prop.count_enum_blobs;
574         }
575         strncpy(r->name, prop.name, DRM_PROP_NAME_LEN);
576         r->name[DRM_PROP_NAME_LEN-1] = 0;
578 err_allocs:
579         drmFree(U642VOID(prop.values_ptr));
580         drmFree(U642VOID(prop.enum_blob_ptr));
582         return r;
585 void drmModeFreeProperty(drmModePropertyPtr ptr)
587         if (!ptr)
588                 return;
590         drmFree(ptr->values);
591         drmFree(ptr->enums);
592         drmFree(ptr);
595 drmModePropertyBlobPtr drmModeGetPropertyBlob(int fd, uint32_t blob_id)
597         struct drm_mode_get_blob blob;
598         drmModePropertyBlobPtr r;
600         blob.length = 0;
601         blob.data = 0;
602         blob.blob_id = blob_id;
604         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob))
605                 return NULL;
607         if (blob.length)
608                 blob.data = VOID2U64(drmMalloc(blob.length));
610         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob)) {
611                 r = NULL;
612                 goto err_allocs;
613         }
615         if (!(r = drmMalloc(sizeof(*r))))
616                 return NULL;
618         r->id = blob.blob_id;
619         r->length = blob.length;
620         r->data = drmAllocCpy(U642VOID(blob.data), 1, blob.length);
622 err_allocs:
623         drmFree(U642VOID(blob.data));
624         return r;
627 void drmModeFreePropertyBlob(drmModePropertyBlobPtr ptr)
629         if (!ptr)
630                 return;
632         drmFree(ptr->data);
633         drmFree(ptr);
636 int drmModeConnectorSetProperty(int fd, uint32_t connector_id, uint32_t property_id,
637                              uint64_t value)
639         struct drm_mode_connector_set_property osp;
640         int ret;
642         osp.connector_id = connector_id;
643         osp.prop_id = property_id;
644         osp.value = value;
646         if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_SETPROPERTY, &osp)))
647                 return ret;
649         return 0;
652 /*
653  * checks if a modesetting capable driver has attached to the pci id
654  * returns 0 if modesetting supported.
655  *  -EINVAL or invalid bus id
656  *  -ENOSYS if no modesetting support
657 */
658 int drmCheckModesettingSupported(const char *busid)
660 #ifdef __linux__
661         char pci_dev_dir[1024];
662         int domain, bus, dev, func;
663         DIR *sysdir;
664         struct dirent *dent;
665         int found = 0, ret;
667         ret = sscanf(busid, "pci:%04x:%02x:%02x.%d", &domain, &bus, &dev, &func);
668         if (ret != 4)
669                 return -EINVAL;
671         sprintf(pci_dev_dir, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/drm",
672                 domain, bus, dev, func);
674         sysdir = opendir(pci_dev_dir);
675         if (sysdir) {
676                 dent = readdir(sysdir);
677                 while (dent) {
678                         if (!strncmp(dent->d_name, "controlD", 8)) {
679                                 found = 1;
680                                 break;
681                         }
683                         dent = readdir(sysdir);
684                 }
685                 closedir(sysdir);
686                 if (found)
687                         return 0;
688         }
690         sprintf(pci_dev_dir, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/",
691                 domain, bus, dev, func);
693         sysdir = opendir(pci_dev_dir);
694         if (!sysdir)
695                 return -EINVAL;
697         dent = readdir(sysdir);
698         while (dent) {
699                 if (!strncmp(dent->d_name, "drm:controlD", 12)) {
700                         found = 1;
701                         break;
702                 }
704                 dent = readdir(sysdir);
705         }
707         closedir(sysdir);
708         if (found)
709                 return 0;
710 #endif
711         return -ENOSYS;
715 int drmModeCrtcGetGamma(int fd, uint32_t crtc_id, uint32_t size,
716                         uint16_t *red, uint16_t *green, uint16_t *blue)
718         int ret;
719         struct drm_mode_crtc_lut l;
721         l.crtc_id = crtc_id;
722         l.gamma_size = size;
723         l.red = VOID2U64(red);
724         l.green = VOID2U64(green);
725         l.blue = VOID2U64(blue);
727         if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_GETGAMMA, &l)))
728                 return ret;
730         return 0;
733 int drmModeCrtcSetGamma(int fd, uint32_t crtc_id, uint32_t size,
734                         uint16_t *red, uint16_t *green, uint16_t *blue)
736         int ret;
737         struct drm_mode_crtc_lut l;
739         l.crtc_id = crtc_id;
740         l.gamma_size = size;
741         l.red = VOID2U64(red);
742         l.green = VOID2U64(green);
743         l.blue = VOID2U64(blue);
745         if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_SETGAMMA, &l)))
746                 return ret;
748         return 0;
751 int drmHandleEvent(int fd, drmEventContextPtr evctx)
753         char buffer[1024];
754         int len, i;
755         struct drm_event *e;
756         struct drm_event_vblank *vblank;
757         
758         /* The DRM read semantics guarantees that we always get only
759          * complete events. */
761         len = read(fd, buffer, sizeof buffer);
762         if (len == 0)
763                 return 0;
764         if (len < sizeof *e)
765                 return -1;
767         i = 0;
768         while (i < len) {
769                 e = (struct drm_event *) &buffer[i];
770                 switch (e->type) {
771                 case DRM_EVENT_VBLANK:
772                         if (evctx->version < 1 ||
773                             evctx->vblank_handler == NULL)
774                                 break;
775                         vblank = (struct drm_event_vblank *) e;
776                         evctx->vblank_handler(fd,
777                                               vblank->sequence, 
778                                               vblank->tv_sec,
779                                               vblank->tv_usec,
780                                               U642VOID (vblank->user_data));
781                         break;
782                 case DRM_EVENT_FLIP_COMPLETE:
783                         if (evctx->version < 2 ||
784                             evctx->page_flip_handler == NULL)
785                                 break;
786                         vblank = (struct drm_event_vblank *) e;
787                         evctx->page_flip_handler(fd,
788                                                  vblank->sequence,
789                                                  vblank->tv_sec,
790                                                  vblank->tv_usec,
791                                                  U642VOID (vblank->user_data));
792                         break;
793                 default:
794                         break;
795                 }
796                 i += e->length;
797         }
799         return 0;
802 int drmModePageFlip(int fd, uint32_t crtc_id, uint32_t fb_id,
803                     uint32_t flags, void *user_data)
805         struct drm_mode_crtc_page_flip flip;
807         flip.fb_id = fb_id;
808         flip.crtc_id = crtc_id;
809         flip.user_data = VOID2U64(user_data);
810         flip.flags = flags;
811         flip.reserved = 0;
813         return drmIoctl(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip);