sys/external/bsd/drm/dist/libdrm/xf86drmMode.c

   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  */
  10
  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  */
  35
  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>
  43
  44 #include "xf86drmMode.h"
  45 #include "xf86drm.h"
  46 #include <drm.h>
  47 #include <string.h>
  48 #include <dirent.h>
  49 #include <errno.h>
  50
  51 #define U642VOID(x) ((void *)(unsigned long)(x))
  52 #define VOID2U64(x) ((uint64_t)(unsigned long)(x))
  53
  54 /*
  55  * Util functions
  56  */
  57
  58 void* drmAllocCpy(void *array, int count, int entry_size)
  59 {
  60         char *r;
  61         int i;
  62
  63         if (!count || !array || !entry_size)
  64                 return 0;
  65
  66         if (!(r = drmMalloc(count*entry_size)))
  67                 return 0;
  68
  69         for (i = 0; i < count; i++)
  70                 memcpy(r+(entry_size*i), array+(entry_size*i), entry_size);
  71
  72         return r;
  73 }
  74
  75 /*
  76  * A couple of free functions.
  77  */
  78
  79 void drmModeFreeModeInfo(drmModeModeInfoPtr ptr)
  80 {
  81         if (!ptr)
  82                 return;
  83
  84         drmFree(ptr);
  85 }
  86
  87 void drmModeFreeResources(drmModeResPtr ptr)
  88 {
  89         if (!ptr)
  90                 return;
  91
  92         drmFree(ptr);
  93
  94 }
  95
  96 void drmModeFreeFB(drmModeFBPtr ptr)
  97 {
  98         if (!ptr)
  99                 return;
 100
 101         /* we might add more frees later. */
 102         drmFree(ptr);
 103 }
 104
 105 void drmModeFreeCrtc(drmModeCrtcPtr ptr)
 106 {
 107         if (!ptr)
 108                 return;
 109
 110         drmFree(ptr);
 111
 112 }
 113
 114 void drmModeFreeConnector(drmModeConnectorPtr ptr)
 115 {
 116         if (!ptr)
 117                 return;
 118
 119         drmFree(ptr->modes);
 120         drmFree(ptr);
 121
 122 }
 123
 124 void drmModeFreeEncoder(drmModeEncoderPtr ptr)
 125 {
 126         drmFree(ptr);
 127 }
 128
 129 /*
 130  * ModeSetting functions.
 131  */
 132
 133 drmModeResPtr drmModeGetResources(int fd)
 134 {
 135         struct drm_mode_card_res res;
 136         drmModeResPtr r = 0;
 137
 138         memset(&res, 0, sizeof(struct drm_mode_card_res));
 139
 140         if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res))
 141                 return 0;
 142
 143         if (res.count_fbs)
 144                 res.fb_id_ptr = VOID2U64(drmMalloc(res.count_fbs*sizeof(uint32_t)));
 145         if (res.count_crtcs)
 146                 res.crtc_id_ptr = VOID2U64(drmMalloc(res.count_crtcs*sizeof(uint32_t)));
 147         if (res.count_connectors)
 148                 res.connector_id_ptr = VOID2U64(drmMalloc(res.count_connectors*sizeof(uint32_t)));
 149         if (res.count_encoders)
 150                 res.encoder_id_ptr = VOID2U64(drmMalloc(res.count_encoders*sizeof(uint32_t)));
 151
 152         if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res)) {
 153                 r = NULL;
 154                 goto err_allocs;
 155         }
 156
 157         /*
 158          * return
 159          */
 160
 161
 162         if (!(r = drmMalloc(sizeof(*r))))
 163                 return 0;
 164
 165         r->min_width     = res.min_width;
 166         r->max_width     = res.max_width;
 167         r->min_height    = res.min_height;
 168         r->max_height    = res.max_height;
 169         r->count_fbs     = res.count_fbs;
 170         r->count_crtcs   = res.count_crtcs;
 171         r->count_connectors = res.count_connectors;
 172         r->count_encoders = res.count_encoders;
 173         /* TODO we realy should test if these allocs fails. */
 174         r->fbs           = drmAllocCpy(U642VOID(res.fb_id_ptr), res.count_fbs, sizeof(uint32_t));
 175         r->crtcs         = drmAllocCpy(U642VOID(res.crtc_id_ptr), res.count_crtcs, sizeof(uint32_t));
 176         r->connectors       = drmAllocCpy(U642VOID(res.connector_id_ptr), res.count_connectors, sizeof(uint32_t));
 177         r->encoders      = drmAllocCpy(U642VOID(res.encoder_id_ptr), res.count_encoders, sizeof(uint32_t));
 178
 179 err_allocs:
 180         drmFree(U642VOID(res.fb_id_ptr));
 181         drmFree(U642VOID(res.crtc_id_ptr));
 182         drmFree(U642VOID(res.connector_id_ptr));
 183         drmFree(U642VOID(res.encoder_id_ptr));
 184
 185         return r;
 186 }
 187
 188 int drmModeAddFB(int fd, uint32_t width, uint32_t height, uint8_t depth,
 189                  uint8_t bpp, uint32_t pitch, uint32_t bo_handle,
 190                  uint32_t *buf_id)
 191 {
 192         struct drm_mode_fb_cmd f;
 193         int ret;
 194
 195         f.width  = width;
 196         f.height = height;
 197         f.pitch  = pitch;
 198         f.bpp    = bpp;
 199         f.depth  = depth;
 200         f.handle = bo_handle;
 201
 202         if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_ADDFB, &f)))
 203                 return ret;
 204
 205         *buf_id = f.fb_id;
 206         return 0;
 207 }
 208
 209 int drmModeRmFB(int fd, uint32_t bufferId)
 210 {
 211         return drmIoctl(fd, DRM_IOCTL_MODE_RMFB, &bufferId);
 212
 213
 214 }
 215
 216 drmModeFBPtr drmModeGetFB(int fd, uint32_t buf)
 217 {
 218         struct drm_mode_fb_cmd info;
 219         drmModeFBPtr r;
 220
 221         info.fb_id = buf;
 222
 223         if (drmIoctl(fd, DRM_IOCTL_MODE_GETFB, &info))
 224                 return NULL;
 225
 226         if (!(r = drmMalloc(sizeof(*r))))
 227                 return NULL;
 228
 229         r->fb_id = info.fb_id;
 230         r->width = info.width;
 231         r->height = info.height;
 232         r->pitch = info.pitch;
 233         r->bpp = info.bpp;
 234         r->handle = info.handle;
 235         r->depth = info.depth;
 236
 237         return r;
 238 }
 239
 240
 241 /*
 242  * Crtc functions
 243  */
 244
 245 drmModeCrtcPtr drmModeGetCrtc(int fd, uint32_t crtcId)
 246 {
 247         struct drm_mode_crtc crtc;
 248         drmModeCrtcPtr r;
 249
 250         crtc.crtc_id = crtcId;
 251
 252         if (drmIoctl(fd, DRM_IOCTL_MODE_GETCRTC, &crtc))
 253                 return 0;
 254
 255         /*
 256          * return
 257          */
 258
 259         if (!(r = drmMalloc(sizeof(*r))))
 260                 return 0;
 261
 262         r->crtc_id         = crtc.crtc_id;
 263         r->x               = crtc.x;
 264         r->y               = crtc.y;
 265         r->mode_valid      = crtc.mode_valid;
 266         if (r->mode_valid)
 267                 memcpy(&r->mode, &crtc.mode, sizeof(struct drm_mode_modeinfo));
 268         r->buffer_id       = crtc.fb_id;
 269         r->gamma_size      = crtc.gamma_size;
 270         return r;
 271 }
 272
 273
 274 int drmModeSetCrtc(int fd, uint32_t crtcId, uint32_t bufferId,
 275                    uint32_t x, uint32_t y, uint32_t *connectors, int count,
 276                    drmModeModeInfoPtr mode)
 277 {
 278         struct drm_mode_crtc crtc;
 279
 280         crtc.x             = x;
 281         crtc.y             = y;
 282         crtc.crtc_id       = crtcId;
 283         crtc.fb_id         = bufferId;
 284         crtc.set_connectors_ptr = VOID2U64(connectors);
 285         crtc.count_connectors = count;
 286         if (mode) {
 287           memcpy(&crtc.mode, mode, sizeof(struct drm_mode_modeinfo));
 288           crtc.mode_valid = 1;
 289         } else
 290           crtc.mode_valid = 0;
 291
 292         return drmIoctl(fd, DRM_IOCTL_MODE_SETCRTC, &crtc);
 293 }
 294
 295 /*
 296  * Cursor manipulation
 297  */
 298
 299 int drmModeSetCursor(int fd, uint32_t crtcId, uint32_t bo_handle, uint32_t width, uint32_t height)
 300 {
 301         struct drm_mode_cursor arg;
 302
 303         arg.flags = DRM_MODE_CURSOR_BO;
 304         arg.crtc_id = crtcId;
 305         arg.width = width;
 306         arg.height = height;
 307         arg.handle = bo_handle;
 308
 309         return drmIoctl(fd, DRM_IOCTL_MODE_CURSOR, &arg);
 310 }
 311
 312 int drmModeMoveCursor(int fd, uint32_t crtcId, int x, int y)
 313 {
 314         struct drm_mode_cursor arg;
 315
 316         arg.flags = DRM_MODE_CURSOR_MOVE;
 317         arg.crtc_id = crtcId;
 318         arg.x = x;
 319         arg.y = y;
 320
 321         return drmIoctl(fd, DRM_IOCTL_MODE_CURSOR, &arg);
 322 }
 323
 324 /*
 325  * Encoder get
 326  */
 327 drmModeEncoderPtr drmModeGetEncoder(int fd, uint32_t encoder_id)
 328 {
 329         struct drm_mode_get_encoder enc;
 330         drmModeEncoderPtr r = NULL;
 331
 332         enc.encoder_id = encoder_id;
 333         enc.encoder_type = 0;
 334         enc.possible_crtcs = 0;
 335         enc.possible_clones = 0;
 336
 337         if (drmIoctl(fd, DRM_IOCTL_MODE_GETENCODER, &enc))
 338                 return 0;
 339
 340         if (!(r = drmMalloc(sizeof(*r))))
 341                 return 0;
 342
 343         r->encoder_id = enc.encoder_id;
 344         r->crtc_id = enc.crtc_id;
 345         r->encoder_type = enc.encoder_type;
 346         r->possible_crtcs = enc.possible_crtcs;
 347         r->possible_clones = enc.possible_clones;
 348
 349         return r;
 350 }
 351
 352 /*
 353  * Connector manipulation
 354  */
 355
 356 drmModeConnectorPtr drmModeGetConnector(int fd, uint32_t connector_id)
 357 {
 358         struct drm_mode_get_connector conn;
 359         drmModeConnectorPtr r = NULL;
 360
 361         conn.connector_id = connector_id;
 362         conn.connector_type_id = 0;
 363         conn.connector_type  = 0;
 364         conn.count_modes  = 0;
 365         conn.modes_ptr    = 0;
 366         conn.count_props  = 0;
 367         conn.props_ptr    = 0;
 368         conn.prop_values_ptr = 0;
 369         conn.count_encoders  = 0;
 370         conn.encoders_ptr = 0;
 371
 372         if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
 373                 return 0;
 374
 375         if (conn.count_props) {
 376                 conn.props_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint32_t)));
 377                 conn.prop_values_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint64_t)));
 378         }
 379
 380         if (conn.count_modes)
 381                 conn.modes_ptr = VOID2U64(drmMalloc(conn.count_modes*sizeof(struct drm_mode_modeinfo)));
 382
 383         if (conn.count_encoders)
 384                 conn.encoders_ptr = VOID2U64(drmMalloc(conn.count_encoders*sizeof(uint32_t)));
 385
 386         if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
 387                 goto err_allocs;
 388
 389         if(!(r = drmMalloc(sizeof(*r)))) {
 390                 goto err_allocs;
 391         }
 392
 393         r->connector_id = conn.connector_id;
 394         r->encoder_id = conn.encoder_id;
 395         r->connection   = conn.connection;
 396         r->mmWidth      = conn.mm_width;
 397         r->mmHeight     = conn.mm_height;
 398         /* convert subpixel from kernel to userspace */
 399         r->subpixel     = conn.subpixel + 1;
 400         r->count_modes  = conn.count_modes;
 401         /* TODO we should test if these alloc & cpy fails. */
 402         r->count_props  = conn.count_props;
 403         r->props        = drmAllocCpy(U642VOID(conn.props_ptr), conn.count_props, sizeof(uint32_t));
 404         r->prop_values  = drmAllocCpy(U642VOID(conn.prop_values_ptr), conn.count_props, sizeof(uint64_t));
 405         r->modes        = drmAllocCpy(U642VOID(conn.modes_ptr), conn.count_modes, sizeof(struct drm_mode_modeinfo));
 406         r->count_encoders = conn.count_encoders;
 407         r->encoders     = drmAllocCpy(U642VOID(conn.encoders_ptr), conn.count_encoders, sizeof(uint32_t));
 408         r->connector_type  = conn.connector_type;
 409         r->connector_type_id = conn.connector_type_id;
 410
 411         if (!r->props || !r->prop_values || !r->modes || !r->encoders)
 412                 goto err_allocs;
 413
 414 err_allocs:
 415         drmFree(U642VOID(conn.prop_values_ptr));
 416         drmFree(U642VOID(conn.props_ptr));
 417         drmFree(U642VOID(conn.modes_ptr));
 418         drmFree(U642VOID(conn.encoders_ptr));
 419
 420         return r;
 421 }
 422
 423 int drmModeAttachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_info)
 424 {
 425         struct drm_mode_mode_cmd res;
 426
 427         memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
 428         res.connector_id = connector_id;
 429
 430         return drmIoctl(fd, DRM_IOCTL_MODE_ATTACHMODE, &res);
 431 }
 432
 433 int drmModeDetachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_info)
 434 {
 435         struct drm_mode_mode_cmd res;
 436
 437         memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
 438         res.connector_id = connector_id;
 439
 440         return drmIoctl(fd, DRM_IOCTL_MODE_DETACHMODE, &res);
 441 }
 442
 443
 444 drmModePropertyPtr drmModeGetProperty(int fd, uint32_t property_id)
 445 {
 446         struct drm_mode_get_property prop;
 447         drmModePropertyPtr r;
 448
 449         prop.prop_id = property_id;
 450         prop.count_enum_blobs = 0;
 451         prop.count_values = 0;
 452         prop.flags = 0;
 453         prop.enum_blob_ptr = 0;
 454         prop.values_ptr = 0;
 455
 456         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPERTY, &prop))
 457                 return 0;
 458
 459         if (prop.count_values)
 460                 prop.values_ptr = VOID2U64(drmMalloc(prop.count_values * sizeof(uint64_t)));
 461
 462         if (prop.count_enum_blobs && (prop.flags & DRM_MODE_PROP_ENUM))
 463                 prop.enum_blob_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(struct drm_mode_property_enum)));
 464
 465         if (prop.count_enum_blobs && (prop.flags & DRM_MODE_PROP_BLOB)) {
 466                 prop.values_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(uint32_t)));
 467                 prop.enum_blob_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(uint32_t)));
 468         }
 469
 470         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPERTY, &prop)) {
 471                 r = NULL;
 472                 goto err_allocs;
 473         }
 474
 475         if (!(r = drmMalloc(sizeof(*r))))
 476                 return NULL;
 477
 478         r->prop_id = prop.prop_id;
 479         r->count_values = prop.count_values;
 480
 481         r->flags = prop.flags;
 482         if (prop.count_values)
 483                 r->values = drmAllocCpy(U642VOID(prop.values_ptr), prop.count_values, sizeof(uint64_t));
 484         if (prop.flags & DRM_MODE_PROP_ENUM) {
 485                 r->count_enums = prop.count_enum_blobs;
 486                 r->enums = drmAllocCpy(U642VOID(prop.enum_blob_ptr), prop.count_enum_blobs, sizeof(struct drm_mode_property_enum));
 487         } else if (prop.flags & DRM_MODE_PROP_BLOB) {
 488                 r->values = drmAllocCpy(U642VOID(prop.values_ptr), prop.count_enum_blobs, sizeof(uint32_t));
 489                 r->blob_ids = drmAllocCpy(U642VOID(prop.enum_blob_ptr), prop.count_enum_blobs, sizeof(uint32_t));
 490                 r->count_blobs = prop.count_enum_blobs;
 491         }
 492         strncpy(r->name, prop.name, DRM_PROP_NAME_LEN);
 493         r->name[DRM_PROP_NAME_LEN-1] = 0;
 494
 495 err_allocs:
 496         drmFree(U642VOID(prop.values_ptr));
 497         drmFree(U642VOID(prop.enum_blob_ptr));
 498
 499         return r;
 500 }
 501
 502 void drmModeFreeProperty(drmModePropertyPtr ptr)
 503 {
 504         if (!ptr)
 505                 return;
 506
 507         drmFree(ptr->values);
 508         drmFree(ptr->enums);
 509         drmFree(ptr);
 510 }
 511
 512 drmModePropertyBlobPtr drmModeGetPropertyBlob(int fd, uint32_t blob_id)
 513 {
 514         struct drm_mode_get_blob blob;
 515         drmModePropertyBlobPtr r;
 516
 517         blob.length = 0;
 518         blob.data = 0;
 519         blob.blob_id = blob_id;
 520
 521         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob))
 522                 return NULL;
 523
 524         if (blob.length)
 525                 blob.data = VOID2U64(drmMalloc(blob.length));
 526
 527         if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob)) {
 528                 r = NULL;
 529                 goto err_allocs;
 530         }
 531
 532         if (!(r = drmMalloc(sizeof(*r))))
 533                 return NULL;
 534
 535         r->id = blob.blob_id;
 536         r->length = blob.length;
 537         r->data = drmAllocCpy(U642VOID(blob.data), 1, blob.length);
 538
 539 err_allocs:
 540         drmFree(U642VOID(blob.data));
 541         return r;
 542 }
 543
 544 void drmModeFreePropertyBlob(drmModePropertyBlobPtr ptr)
 545 {
 546         if (!ptr)
 547                 return;
 548
 549         drmFree(ptr->data);
 550         drmFree(ptr);
 551 }
 552
 553 int drmModeConnectorSetProperty(int fd, uint32_t connector_id, uint32_t property_id,
 554                              uint64_t value)
 555 {
 556         struct drm_mode_connector_set_property osp;
 557         int ret;
 558
 559         osp.connector_id = connector_id;
 560         osp.prop_id = property_id;
 561         osp.value = value;
 562
 563         if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_SETPROPERTY, &osp)))
 564                 return ret;
 565
 566         return 0;
 567 }
 568
 569 /*
 570  * checks if a modesetting capable driver has attached to the pci id
 571  * returns 0 if modesetting supported.
 572  *  -EINVAL or invalid bus id
 573  *  -ENOSYS if no modesetting support
 574 */
 575 int drmCheckModesettingSupported(const char *busid)
 576 {
 577 #ifdef __linux__
 578         char pci_dev_dir[1024];
 579         int domain, bus, dev, func;
 580         DIR *sysdir;
 581         struct dirent *dent;
 582         int found = 0, ret;
 583
 584         ret = sscanf(busid, "pci:%04x:%02x:%02x.%d", &domain, &bus, &dev, &func);
 585         if (ret != 4)
 586                 return -EINVAL;
 587
 588         sprintf(pci_dev_dir, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/drm",
 589                 domain, bus, dev, func);
 590
 591         sysdir = opendir(pci_dev_dir);
 592         if (sysdir) {
 593                 dent = readdir(sysdir);
 594                 while (dent) {
 595                         if (!strncmp(dent->d_name, "controlD", 8)) {
 596                                 found = 1;
 597                                 break;
 598                         }
 599
 600                         dent = readdir(sysdir);
 601                 }
 602                 closedir(sysdir);
 603                 if (found)
 604                         return 0;
 605         }
 606
 607         sprintf(pci_dev_dir, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/",
 608                 domain, bus, dev, func);
 609
 610         sysdir = opendir(pci_dev_dir);
 611         if (!sysdir)
 612                 return -EINVAL;
 613
 614         dent = readdir(sysdir);
 615         while (dent) {
 616                 if (!strncmp(dent->d_name, "drm:controlD", 12)) {
 617                         found = 1;
 618                         break;
 619                 }
 620
 621                 dent = readdir(sysdir);
 622         }
 623
 624         closedir(sysdir);
 625         if (found)
 626                 return 0;
 627 #endif
 628         return -ENOSYS;
 629
 630 }
 631
 632 int drmModeCrtcGetGamma(int fd, uint32_t crtc_id, uint32_t size,
 633                         uint16_t *red, uint16_t *green, uint16_t *blue)
 634 {
 635         int ret;
 636         struct drm_mode_crtc_lut l;
 637
 638         l.crtc_id = crtc_id;
 639         l.gamma_size = size;
 640         l.red = VOID2U64(red);
 641         l.green = VOID2U64(green);
 642         l.blue = VOID2U64(blue);
 643
 644         if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_GETGAMMA, &l)))
 645                 return ret;
 646
 647         return 0;
 648 }
 649
 650 int drmModeCrtcSetGamma(int fd, uint32_t crtc_id, uint32_t size,
 651                         uint16_t *red, uint16_t *green, uint16_t *blue)
 652 {
 653         int ret;
 654         struct drm_mode_crtc_lut l;
 655
 656         l.crtc_id = crtc_id;
 657         l.gamma_size = size;
 658         l.red = VOID2U64(red);
 659         l.green = VOID2U64(green);
 660         l.blue = VOID2U64(blue);
 661
 662         if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_SETGAMMA, &l)))
 663                 return ret;
 664
 665         return 0;
 666 }