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
drmAllocCpy(void * array,int count,int entry_size)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
drmModeFreeModeInfo(drmModeModeInfoPtr ptr)79 void drmModeFreeModeInfo(drmModeModeInfoPtr ptr)
80 {
81 if (!ptr)
82 return;
83
84 drmFree(ptr);
85 }
86
drmModeFreeResources(drmModeResPtr ptr)87 void drmModeFreeResources(drmModeResPtr ptr)
88 {
89 if (!ptr)
90 return;
91
92 drmFree(ptr);
93
94 }
95
drmModeFreeFB(drmModeFBPtr ptr)96 void drmModeFreeFB(drmModeFBPtr ptr)
97 {
98 if (!ptr)
99 return;
100
101 /* we might add more frees later. */
102 drmFree(ptr);
103 }
104
drmModeFreeCrtc(drmModeCrtcPtr ptr)105 void drmModeFreeCrtc(drmModeCrtcPtr ptr)
106 {
107 if (!ptr)
108 return;
109
110 drmFree(ptr);
111
112 }
113
drmModeFreeConnector(drmModeConnectorPtr ptr)114 void drmModeFreeConnector(drmModeConnectorPtr ptr)
115 {
116 if (!ptr)
117 return;
118
119 drmFree(ptr->encoders);
120 drmFree(ptr->prop_values);
121 drmFree(ptr->props);
122 drmFree(ptr->modes);
123 drmFree(ptr);
124
125 }
126
drmModeFreeEncoder(drmModeEncoderPtr ptr)127 void drmModeFreeEncoder(drmModeEncoderPtr ptr)
128 {
129 drmFree(ptr);
130 }
131
132 /*
133 * ModeSetting functions.
134 */
135
drmModeGetResources(int fd)136 drmModeResPtr drmModeGetResources(int fd)
137 {
138 struct drm_mode_card_res res;
139 drmModeResPtr r = 0;
140
141 memset(&res, 0, sizeof(struct drm_mode_card_res));
142
143 if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res))
144 return 0;
145
146 if (res.count_fbs)
147 res.fb_id_ptr = VOID2U64(drmMalloc(res.count_fbs*sizeof(uint32_t)));
148 if (res.count_crtcs)
149 res.crtc_id_ptr = VOID2U64(drmMalloc(res.count_crtcs*sizeof(uint32_t)));
150 if (res.count_connectors)
151 res.connector_id_ptr = VOID2U64(drmMalloc(res.count_connectors*sizeof(uint32_t)));
152 if (res.count_encoders)
153 res.encoder_id_ptr = VOID2U64(drmMalloc(res.count_encoders*sizeof(uint32_t)));
154
155 if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res)) {
156 r = NULL;
157 goto err_allocs;
158 }
159
160 /*
161 * return
162 */
163
164
165 if (!(r = drmMalloc(sizeof(*r))))
166 return 0;
167
168 r->min_width = res.min_width;
169 r->max_width = res.max_width;
170 r->min_height = res.min_height;
171 r->max_height = res.max_height;
172 r->count_fbs = res.count_fbs;
173 r->count_crtcs = res.count_crtcs;
174 r->count_connectors = res.count_connectors;
175 r->count_encoders = res.count_encoders;
176 /* TODO we realy should test if these allocs fails. */
177 r->fbs = drmAllocCpy(U642VOID(res.fb_id_ptr), res.count_fbs, sizeof(uint32_t));
178 r->crtcs = drmAllocCpy(U642VOID(res.crtc_id_ptr), res.count_crtcs, sizeof(uint32_t));
179 r->connectors = drmAllocCpy(U642VOID(res.connector_id_ptr), res.count_connectors, sizeof(uint32_t));
180 r->encoders = drmAllocCpy(U642VOID(res.encoder_id_ptr), res.count_encoders, sizeof(uint32_t));
181
182 err_allocs:
183 drmFree(U642VOID(res.fb_id_ptr));
184 drmFree(U642VOID(res.crtc_id_ptr));
185 drmFree(U642VOID(res.connector_id_ptr));
186 drmFree(U642VOID(res.encoder_id_ptr));
187
188 return r;
189 }
190
drmModeAddFB(int fd,uint32_t width,uint32_t height,uint8_t depth,uint8_t bpp,uint32_t pitch,uint32_t bo_handle,uint32_t * buf_id)191 int drmModeAddFB(int fd, uint32_t width, uint32_t height, uint8_t depth,
192 uint8_t bpp, uint32_t pitch, uint32_t bo_handle,
193 uint32_t *buf_id)
194 {
195 struct drm_mode_fb_cmd f;
196 int ret;
197
198 f.width = width;
199 f.height = height;
200 f.pitch = pitch;
201 f.bpp = bpp;
202 f.depth = depth;
203 f.handle = bo_handle;
204
205 if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_ADDFB, &f)))
206 return ret;
207
208 *buf_id = f.fb_id;
209 return 0;
210 }
211
drmModeRmFB(int fd,uint32_t bufferId)212 int drmModeRmFB(int fd, uint32_t bufferId)
213 {
214 return drmIoctl(fd, DRM_IOCTL_MODE_RMFB, &bufferId);
215
216
217 }
218
drmModeGetFB(int fd,uint32_t buf)219 drmModeFBPtr drmModeGetFB(int fd, uint32_t buf)
220 {
221 struct drm_mode_fb_cmd info;
222 drmModeFBPtr r;
223
224 info.fb_id = buf;
225
226 if (drmIoctl(fd, DRM_IOCTL_MODE_GETFB, &info))
227 return NULL;
228
229 if (!(r = drmMalloc(sizeof(*r))))
230 return NULL;
231
232 r->fb_id = info.fb_id;
233 r->width = info.width;
234 r->height = info.height;
235 r->pitch = info.pitch;
236 r->bpp = info.bpp;
237 r->handle = info.handle;
238 r->depth = info.depth;
239
240 return r;
241 }
242
243
244 /*
245 * Crtc functions
246 */
247
drmModeGetCrtc(int fd,uint32_t crtcId)248 drmModeCrtcPtr drmModeGetCrtc(int fd, uint32_t crtcId)
249 {
250 struct drm_mode_crtc crtc;
251 drmModeCrtcPtr r;
252
253 crtc.crtc_id = crtcId;
254
255 if (drmIoctl(fd, DRM_IOCTL_MODE_GETCRTC, &crtc))
256 return 0;
257
258 /*
259 * return
260 */
261
262 if (!(r = drmMalloc(sizeof(*r))))
263 return 0;
264
265 r->crtc_id = crtc.crtc_id;
266 r->x = crtc.x;
267 r->y = crtc.y;
268 r->mode_valid = crtc.mode_valid;
269 if (r->mode_valid)
270 memcpy(&r->mode, &crtc.mode, sizeof(struct drm_mode_modeinfo));
271 r->buffer_id = crtc.fb_id;
272 r->gamma_size = crtc.gamma_size;
273 return r;
274 }
275
276
drmModeSetCrtc(int fd,uint32_t crtcId,uint32_t bufferId,uint32_t x,uint32_t y,uint32_t * connectors,int count,drmModeModeInfoPtr mode)277 int drmModeSetCrtc(int fd, uint32_t crtcId, uint32_t bufferId,
278 uint32_t x, uint32_t y, uint32_t *connectors, int count,
279 drmModeModeInfoPtr mode)
280 {
281 struct drm_mode_crtc crtc;
282
283 crtc.x = x;
284 crtc.y = y;
285 crtc.crtc_id = crtcId;
286 crtc.fb_id = bufferId;
287 crtc.set_connectors_ptr = VOID2U64(connectors);
288 crtc.count_connectors = count;
289 if (mode) {
290 memcpy(&crtc.mode, mode, sizeof(struct drm_mode_modeinfo));
291 crtc.mode_valid = 1;
292 } else
293 crtc.mode_valid = 0;
294
295 return drmIoctl(fd, DRM_IOCTL_MODE_SETCRTC, &crtc);
296 }
297
298 /*
299 * Cursor manipulation
300 */
301
drmModeSetCursor(int fd,uint32_t crtcId,uint32_t bo_handle,uint32_t width,uint32_t height)302 int drmModeSetCursor(int fd, uint32_t crtcId, uint32_t bo_handle, uint32_t width, uint32_t height)
303 {
304 struct drm_mode_cursor arg;
305
306 arg.flags = DRM_MODE_CURSOR_BO;
307 arg.crtc_id = crtcId;
308 arg.width = width;
309 arg.height = height;
310 arg.handle = bo_handle;
311
312 return drmIoctl(fd, DRM_IOCTL_MODE_CURSOR, &arg);
313 }
314
drmModeMoveCursor(int fd,uint32_t crtcId,int x,int y)315 int drmModeMoveCursor(int fd, uint32_t crtcId, int x, int y)
316 {
317 struct drm_mode_cursor arg;
318
319 arg.flags = DRM_MODE_CURSOR_MOVE;
320 arg.crtc_id = crtcId;
321 arg.x = x;
322 arg.y = y;
323
324 return drmIoctl(fd, DRM_IOCTL_MODE_CURSOR, &arg);
325 }
326
327 /*
328 * Encoder get
329 */
drmModeGetEncoder(int fd,uint32_t encoder_id)330 drmModeEncoderPtr drmModeGetEncoder(int fd, uint32_t encoder_id)
331 {
332 struct drm_mode_get_encoder enc;
333 drmModeEncoderPtr r = NULL;
334
335 enc.encoder_id = encoder_id;
336 enc.encoder_type = 0;
337 enc.possible_crtcs = 0;
338 enc.possible_clones = 0;
339
340 if (drmIoctl(fd, DRM_IOCTL_MODE_GETENCODER, &enc))
341 return 0;
342
343 if (!(r = drmMalloc(sizeof(*r))))
344 return 0;
345
346 r->encoder_id = enc.encoder_id;
347 r->crtc_id = enc.crtc_id;
348 r->encoder_type = enc.encoder_type;
349 r->possible_crtcs = enc.possible_crtcs;
350 r->possible_clones = enc.possible_clones;
351
352 return r;
353 }
354
355 /*
356 * Connector manipulation
357 */
358
drmModeGetConnector(int fd,uint32_t connector_id)359 drmModeConnectorPtr drmModeGetConnector(int fd, uint32_t connector_id)
360 {
361 struct drm_mode_get_connector conn, counts;
362 drmModeConnectorPtr r = NULL;
363
364 retry:
365 memset(&conn, 0, sizeof(struct drm_mode_get_connector));
366 conn.connector_id = connector_id;
367
368 if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
369 return 0;
370
371 counts = conn;
372
373 if (conn.count_props) {
374 conn.props_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint32_t)));
375 if (!conn.props_ptr)
376 goto err_allocs;
377 conn.prop_values_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint64_t)));
378 if (!conn.prop_values_ptr)
379 goto err_allocs;
380 }
381
382 if (conn.count_modes) {
383 conn.modes_ptr = VOID2U64(drmMalloc(conn.count_modes*sizeof(struct drm_mode_modeinfo)));
384 if (!conn.modes_ptr)
385 goto err_allocs;
386 }
387
388 if (conn.count_encoders) {
389 conn.encoders_ptr = VOID2U64(drmMalloc(conn.count_encoders*sizeof(uint32_t)));
390 if (!conn.encoders_ptr)
391 goto err_allocs;
392 }
393
394 if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
395 goto err_allocs;
396
397 /* The number of available connectors and etc may have changed with a
398 * hotplug event in between the ioctls, in which case the field is
399 * silently ignored by the kernel.
400 */
401 if (counts.count_props < conn.count_props ||
402 counts.count_modes < conn.count_modes ||
403 counts.count_encoders < conn.count_encoders) {
404 drmFree(U642VOID(conn.props_ptr));
405 drmFree(U642VOID(conn.prop_values_ptr));
406 drmFree(U642VOID(conn.modes_ptr));
407 drmFree(U642VOID(conn.encoders_ptr));
408
409 goto retry;
410 }
411
412 if(!(r = drmMalloc(sizeof(*r)))) {
413 goto err_allocs;
414 }
415
416 r->connector_id = conn.connector_id;
417 r->encoder_id = conn.encoder_id;
418 r->connection = conn.connection;
419 r->mmWidth = conn.mm_width;
420 r->mmHeight = conn.mm_height;
421 /* convert subpixel from kernel to userspace */
422 r->subpixel = conn.subpixel + 1;
423 r->count_modes = conn.count_modes;
424 r->count_props = conn.count_props;
425 r->props = drmAllocCpy(U642VOID(conn.props_ptr), conn.count_props, sizeof(uint32_t));
426 r->prop_values = drmAllocCpy(U642VOID(conn.prop_values_ptr), conn.count_props, sizeof(uint64_t));
427 r->modes = drmAllocCpy(U642VOID(conn.modes_ptr), conn.count_modes, sizeof(struct drm_mode_modeinfo));
428 r->count_encoders = conn.count_encoders;
429 r->encoders = drmAllocCpy(U642VOID(conn.encoders_ptr), conn.count_encoders, sizeof(uint32_t));
430 r->connector_type = conn.connector_type;
431 r->connector_type_id = conn.connector_type_id;
432
433 if ((r->count_props && !r->props) ||
434 (r->count_props && !r->prop_values) ||
435 (r->count_modes && !r->modes) ||
436 (r->count_encoders && !r->encoders)) {
437 drmFree(r->props);
438 drmFree(r->prop_values);
439 drmFree(r->modes);
440 drmFree(r->encoders);
441 drmFree(r);
442 r = 0;
443 }
444
445 err_allocs:
446 drmFree(U642VOID(conn.prop_values_ptr));
447 drmFree(U642VOID(conn.props_ptr));
448 drmFree(U642VOID(conn.modes_ptr));
449 drmFree(U642VOID(conn.encoders_ptr));
450
451 return r;
452 }
453
drmModeAttachMode(int fd,uint32_t connector_id,drmModeModeInfoPtr mode_info)454 int drmModeAttachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_info)
455 {
456 struct drm_mode_mode_cmd res;
457
458 memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
459 res.connector_id = connector_id;
460
461 return drmIoctl(fd, DRM_IOCTL_MODE_ATTACHMODE, &res);
462 }
463
drmModeDetachMode(int fd,uint32_t connector_id,drmModeModeInfoPtr mode_info)464 int drmModeDetachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_info)
465 {
466 struct drm_mode_mode_cmd res;
467
468 memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
469 res.connector_id = connector_id;
470
471 return drmIoctl(fd, DRM_IOCTL_MODE_DETACHMODE, &res);
472 }
473
474
drmModeGetProperty(int fd,uint32_t property_id)475 drmModePropertyPtr drmModeGetProperty(int fd, uint32_t property_id)
476 {
477 struct drm_mode_get_property prop;
478 drmModePropertyPtr r;
479
480 prop.prop_id = property_id;
481 prop.count_enum_blobs = 0;
482 prop.count_values = 0;
483 prop.flags = 0;
484 prop.enum_blob_ptr = 0;
485 prop.values_ptr = 0;
486
487 if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPERTY, &prop))
488 return 0;
489
490 if (prop.count_values)
491 prop.values_ptr = VOID2U64(drmMalloc(prop.count_values * sizeof(uint64_t)));
492
493 if (prop.count_enum_blobs && (prop.flags & DRM_MODE_PROP_ENUM))
494 prop.enum_blob_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(struct drm_mode_property_enum)));
495
496 if (prop.count_enum_blobs && (prop.flags & DRM_MODE_PROP_BLOB)) {
497 prop.values_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(uint32_t)));
498 prop.enum_blob_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(uint32_t)));
499 }
500
501 if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPERTY, &prop)) {
502 r = NULL;
503 goto err_allocs;
504 }
505
506 if (!(r = drmMalloc(sizeof(*r))))
507 return NULL;
508
509 r->prop_id = prop.prop_id;
510 r->count_values = prop.count_values;
511
512 r->flags = prop.flags;
513 if (prop.count_values)
514 r->values = drmAllocCpy(U642VOID(prop.values_ptr), prop.count_values, sizeof(uint64_t));
515 if (prop.flags & DRM_MODE_PROP_ENUM) {
516 r->count_enums = prop.count_enum_blobs;
517 r->enums = drmAllocCpy(U642VOID(prop.enum_blob_ptr), prop.count_enum_blobs, sizeof(struct drm_mode_property_enum));
518 } else if (prop.flags & DRM_MODE_PROP_BLOB) {
519 r->values = drmAllocCpy(U642VOID(prop.values_ptr), prop.count_enum_blobs, sizeof(uint32_t));
520 r->blob_ids = drmAllocCpy(U642VOID(prop.enum_blob_ptr), prop.count_enum_blobs, sizeof(uint32_t));
521 r->count_blobs = prop.count_enum_blobs;
522 }
523 strncpy(r->name, prop.name, DRM_PROP_NAME_LEN);
524 r->name[DRM_PROP_NAME_LEN-1] = 0;
525
526 err_allocs:
527 drmFree(U642VOID(prop.values_ptr));
528 drmFree(U642VOID(prop.enum_blob_ptr));
529
530 return r;
531 }
532
drmModeFreeProperty(drmModePropertyPtr ptr)533 void drmModeFreeProperty(drmModePropertyPtr ptr)
534 {
535 if (!ptr)
536 return;
537
538 drmFree(ptr->values);
539 drmFree(ptr->enums);
540 drmFree(ptr);
541 }
542
drmModeGetPropertyBlob(int fd,uint32_t blob_id)543 drmModePropertyBlobPtr drmModeGetPropertyBlob(int fd, uint32_t blob_id)
544 {
545 struct drm_mode_get_blob blob;
546 drmModePropertyBlobPtr r;
547
548 blob.length = 0;
549 blob.data = 0;
550 blob.blob_id = blob_id;
551
552 if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob))
553 return NULL;
554
555 if (blob.length)
556 blob.data = VOID2U64(drmMalloc(blob.length));
557
558 if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob)) {
559 r = NULL;
560 goto err_allocs;
561 }
562
563 if (!(r = drmMalloc(sizeof(*r))))
564 return NULL;
565
566 r->id = blob.blob_id;
567 r->length = blob.length;
568 r->data = drmAllocCpy(U642VOID(blob.data), 1, blob.length);
569
570 err_allocs:
571 drmFree(U642VOID(blob.data));
572 return r;
573 }
574
drmModeFreePropertyBlob(drmModePropertyBlobPtr ptr)575 void drmModeFreePropertyBlob(drmModePropertyBlobPtr ptr)
576 {
577 if (!ptr)
578 return;
579
580 drmFree(ptr->data);
581 drmFree(ptr);
582 }
583
drmModeConnectorSetProperty(int fd,uint32_t connector_id,uint32_t property_id,uint64_t value)584 int drmModeConnectorSetProperty(int fd, uint32_t connector_id, uint32_t property_id,
585 uint64_t value)
586 {
587 struct drm_mode_connector_set_property osp;
588 int ret;
589
590 osp.connector_id = connector_id;
591 osp.prop_id = property_id;
592 osp.value = value;
593
594 if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_SETPROPERTY, &osp)))
595 return ret;
596
597 return 0;
598 }
599
600 /*
601 * checks if a modesetting capable driver has attached to the pci id
602 * returns 0 if modesetting supported.
603 * -EINVAL or invalid bus id
604 * -ENOSYS if no modesetting support
605 */
drmCheckModesettingSupported(const char * busid)606 int drmCheckModesettingSupported(const char *busid)
607 {
608 #ifdef __linux__
609 char pci_dev_dir[1024];
610 int domain, bus, dev, func;
611 DIR *sysdir;
612 struct dirent *dent;
613 int found = 0, ret;
614
615 ret = sscanf(busid, "pci:%04x:%02x:%02x.%d", &domain, &bus, &dev, &func);
616 if (ret != 4)
617 return -EINVAL;
618
619 sprintf(pci_dev_dir, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/drm",
620 domain, bus, dev, func);
621
622 sysdir = opendir(pci_dev_dir);
623 if (sysdir) {
624 dent = readdir(sysdir);
625 while (dent) {
626 if (!strncmp(dent->d_name, "controlD", 8)) {
627 found = 1;
628 break;
629 }
630
631 dent = readdir(sysdir);
632 }
633 closedir(sysdir);
634 if (found)
635 return 0;
636 }
637
638 sprintf(pci_dev_dir, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/",
639 domain, bus, dev, func);
640
641 sysdir = opendir(pci_dev_dir);
642 if (!sysdir)
643 return -EINVAL;
644
645 dent = readdir(sysdir);
646 while (dent) {
647 if (!strncmp(dent->d_name, "drm:controlD", 12)) {
648 found = 1;
649 break;
650 }
651
652 dent = readdir(sysdir);
653 }
654
655 closedir(sysdir);
656 if (found)
657 return 0;
658 #endif
659 return -ENOSYS;
660
661 }
662
drmModeCrtcGetGamma(int fd,uint32_t crtc_id,uint32_t size,uint16_t * red,uint16_t * green,uint16_t * blue)663 int drmModeCrtcGetGamma(int fd, uint32_t crtc_id, uint32_t size,
664 uint16_t *red, uint16_t *green, uint16_t *blue)
665 {
666 int ret;
667 struct drm_mode_crtc_lut l;
668
669 l.crtc_id = crtc_id;
670 l.gamma_size = size;
671 l.red = VOID2U64(red);
672 l.green = VOID2U64(green);
673 l.blue = VOID2U64(blue);
674
675 if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_GETGAMMA, &l)))
676 return ret;
677
678 return 0;
679 }
680
drmModeCrtcSetGamma(int fd,uint32_t crtc_id,uint32_t size,uint16_t * red,uint16_t * green,uint16_t * blue)681 int drmModeCrtcSetGamma(int fd, uint32_t crtc_id, uint32_t size,
682 uint16_t *red, uint16_t *green, uint16_t *blue)
683 {
684 int ret;
685 struct drm_mode_crtc_lut l;
686
687 l.crtc_id = crtc_id;
688 l.gamma_size = size;
689 l.red = VOID2U64(red);
690 l.green = VOID2U64(green);
691 l.blue = VOID2U64(blue);
692
693 if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_SETGAMMA, &l)))
694 return ret;
695
696 return 0;
697 }
698