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1/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 *
5 * DRM core CRTC related functions
6 *
7 * Permission to use, copy, modify, distribute, and sell this software and its
8 * documentation for any purpose is hereby granted without fee, provided that
9 * the above copyright notice appear in all copies and that both that copyright
10 * notice and this permission notice appear in supporting documentation, and
11 * that the name of the copyright holders not be used in advertising or
12 * publicity pertaining to distribution of the software without specific,
13 * written prior permission. The copyright holders make no representations
14 * about the suitability of this software for any purpose. It is provided "as
15 * is" without express or implied warranty.
16 *
17 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
19 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
22 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
23 * OF THIS SOFTWARE.
24 *
25 * Authors:
26 * Keith Packard
27 * Eric Anholt <eric@anholt.net>
28 * Dave Airlie <airlied@linux.ie>
29 * Jesse Barnes <jesse.barnes@intel.com>
30 */
31
32#include "drmP.h"
33#include "drm_crtc.h"
34#include "drm_crtc_helper.h"
35#include "drm_fb_helper.h"
36
37static bool drm_kms_helper_poll = true;
38module_param_named(poll, drm_kms_helper_poll, bool, 0600);
39
40static void drm_mode_validate_flag(struct drm_connector *connector,
41 int flags)
42{
43 struct drm_display_mode *mode, *t;
44
45 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
46 return;
47
48 list_for_each_entry_safe(mode, t, &connector->modes, head) {
49 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
50 !(flags & DRM_MODE_FLAG_INTERLACE))
51 mode->status = MODE_NO_INTERLACE;
52 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
53 !(flags & DRM_MODE_FLAG_DBLSCAN))
54 mode->status = MODE_NO_DBLESCAN;
55 }
56
57 return;
58}
59
60/**
61 * drm_helper_probe_single_connector_modes - get complete set of display modes
62 * @dev: DRM device
63 * @maxX: max width for modes
64 * @maxY: max height for modes
65 *
66 * LOCKING:
67 * Caller must hold mode config lock.
68 *
69 * Based on @dev's mode_config layout, scan all the connectors and try to detect
70 * modes on them. Modes will first be added to the connector's probed_modes
71 * list, then culled (based on validity and the @maxX, @maxY parameters) and
72 * put into the normal modes list.
73 *
74 * Intended to be used either at bootup time or when major configuration
75 * changes have occurred.
76 *
77 * FIXME: take into account monitor limits
78 *
79 * RETURNS:
80 * Number of modes found on @connector.
81 */
82int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
83 uint32_t maxX, uint32_t maxY)
84{
85 struct drm_device *dev = connector->dev;
86 struct drm_display_mode *mode, *t;
87 struct drm_connector_helper_funcs *connector_funcs =
88 connector->helper_private;
89 int count = 0;
90 int mode_flags = 0;
91
92 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
93 drm_get_connector_name(connector));
94 /* set all modes to the unverified state */
95 list_for_each_entry_safe(mode, t, &connector->modes, head)
96 mode->status = MODE_UNVERIFIED;
97
98 if (connector->force) {
99 if (connector->force == DRM_FORCE_ON)
100 connector->status = connector_status_connected;
101 else
102 connector->status = connector_status_disconnected;
103 if (connector->funcs->force)
104 connector->funcs->force(connector);
105 } else {
106 connector->status = connector->funcs->detect(connector, true);
107 drm_kms_helper_poll_enable(dev);
108 }
109
110 if (connector->status == connector_status_disconnected) {
111 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
112 connector->base.id, drm_get_connector_name(connector));
113 drm_mode_connector_update_edid_property(connector, NULL);
114 goto prune;
115 }
116
117 count = (*connector_funcs->get_modes)(connector);
118 if (count == 0 && connector->status == connector_status_connected)
119 count = drm_add_modes_noedid(connector, 1024, 768);
120 if (count == 0)
121 goto prune;
122
123 drm_mode_connector_list_update(connector);
124
125 if (maxX && maxY)
126 drm_mode_validate_size(dev, &connector->modes, maxX,
127 maxY, 0);
128
129 if (connector->interlace_allowed)
130 mode_flags |= DRM_MODE_FLAG_INTERLACE;
131 if (connector->doublescan_allowed)
132 mode_flags |= DRM_MODE_FLAG_DBLSCAN;
133 drm_mode_validate_flag(connector, mode_flags);
134
135 list_for_each_entry_safe(mode, t, &connector->modes, head) {
136 if (mode->status == MODE_OK)
137 mode->status = connector_funcs->mode_valid(connector,
138 mode);
139 }
140
141prune:
142 drm_mode_prune_invalid(dev, &connector->modes, true);
143
144 if (list_empty(&connector->modes))
145 return 0;
146
147 drm_mode_sort(&connector->modes);
148
149 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
150 drm_get_connector_name(connector));
151 list_for_each_entry_safe(mode, t, &connector->modes, head) {
152 mode->vrefresh = drm_mode_vrefresh(mode);
153
154 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
155 drm_mode_debug_printmodeline(mode);
156 }
157
158 return count;
159}
160EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
161
162/**
163 * drm_helper_encoder_in_use - check if a given encoder is in use
164 * @encoder: encoder to check
165 *
166 * LOCKING:
167 * Caller must hold mode config lock.
168 *
169 * Walk @encoders's DRM device's mode_config and see if it's in use.
170 *
171 * RETURNS:
172 * True if @encoder is part of the mode_config, false otherwise.
173 */
174bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
175{
176 struct drm_connector *connector;
177 struct drm_device *dev = encoder->dev;
178 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
179 if (connector->encoder == encoder)
180 return true;
181 return false;
182}
183EXPORT_SYMBOL(drm_helper_encoder_in_use);
184
185/**
186 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
187 * @crtc: CRTC to check
188 *
189 * LOCKING:
190 * Caller must hold mode config lock.
191 *
192 * Walk @crtc's DRM device's mode_config and see if it's in use.
193 *
194 * RETURNS:
195 * True if @crtc is part of the mode_config, false otherwise.
196 */
197bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
198{
199 struct drm_encoder *encoder;
200 struct drm_device *dev = crtc->dev;
201 /* FIXME: Locking around list access? */
202 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
203 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
204 return true;
205 return false;
206}
207EXPORT_SYMBOL(drm_helper_crtc_in_use);
208
209static void
210drm_encoder_disable(struct drm_encoder *encoder)
211{
212 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
213
214 if (encoder_funcs->disable)
215 (*encoder_funcs->disable)(encoder);
216 else
217 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
218}
219
220/**
221 * drm_helper_disable_unused_functions - disable unused objects
222 * @dev: DRM device
223 *
224 * LOCKING:
225 * Caller must hold mode config lock.
226 *
227 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
228 * by calling its dpms function, which should power it off.
229 */
230void drm_helper_disable_unused_functions(struct drm_device *dev)
231{
232 struct drm_encoder *encoder;
233 struct drm_connector *connector;
234 struct drm_crtc *crtc;
235
236 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
237 if (!connector->encoder)
238 continue;
239 if (connector->status == connector_status_disconnected)
240 connector->encoder = NULL;
241 }
242
243 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
244 if (!drm_helper_encoder_in_use(encoder)) {
245 drm_encoder_disable(encoder);
246 /* disconnector encoder from any connector */
247 encoder->crtc = NULL;
248 }
249 }
250
251 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
252 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
253 crtc->enabled = drm_helper_crtc_in_use(crtc);
254 if (!crtc->enabled) {
255 if (crtc_funcs->disable)
256 (*crtc_funcs->disable)(crtc);
257 else
258 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
259 crtc->fb = NULL;
260 }
261 }
262}
263EXPORT_SYMBOL(drm_helper_disable_unused_functions);
264
265/**
266 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
267 * @encoder: encoder to test
268 * @crtc: crtc to test
269 *
270 * Return false if @encoder can't be driven by @crtc, true otherwise.
271 */
272static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
273 struct drm_crtc *crtc)
274{
275 struct drm_device *dev;
276 struct drm_crtc *tmp;
277 int crtc_mask = 1;
278
279 WARN(!crtc, "checking null crtc?\n");
280
281 dev = crtc->dev;
282
283 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
284 if (tmp == crtc)
285 break;
286 crtc_mask <<= 1;
287 }
288
289 if (encoder->possible_crtcs & crtc_mask)
290 return true;
291 return false;
292}
293
294/*
295 * Check the CRTC we're going to map each output to vs. its current
296 * CRTC. If they don't match, we have to disable the output and the CRTC
297 * since the driver will have to re-route things.
298 */
299static void
300drm_crtc_prepare_encoders(struct drm_device *dev)
301{
302 struct drm_encoder_helper_funcs *encoder_funcs;
303 struct drm_encoder *encoder;
304
305 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
306 encoder_funcs = encoder->helper_private;
307 /* Disable unused encoders */
308 if (encoder->crtc == NULL)
309 drm_encoder_disable(encoder);
310 /* Disable encoders whose CRTC is about to change */
311 if (encoder_funcs->get_crtc &&
312 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
313 drm_encoder_disable(encoder);
314 }
315}
316
317/**
318 * drm_crtc_set_mode - set a mode
319 * @crtc: CRTC to program
320 * @mode: mode to use
321 * @x: width of mode
322 * @y: height of mode
323 *
324 * LOCKING:
325 * Caller must hold mode config lock.
326 *
327 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
328 * to fixup or reject the mode prior to trying to set it.
329 *
330 * RETURNS:
331 * True if the mode was set successfully, or false otherwise.
332 */
333bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
334 struct drm_display_mode *mode,
335 int x, int y,
336 struct drm_framebuffer *old_fb)
337{
338 struct drm_device *dev = crtc->dev;
339 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
340 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
341 struct drm_encoder_helper_funcs *encoder_funcs;
342 int saved_x, saved_y;
343 struct drm_encoder *encoder;
344 bool ret = true;
345
346 crtc->enabled = drm_helper_crtc_in_use(crtc);
347 if (!crtc->enabled)
348 return true;
349
350 adjusted_mode = drm_mode_duplicate(dev, mode);
351
352 saved_hwmode = crtc->hwmode;
353 saved_mode = crtc->mode;
354 saved_x = crtc->x;
355 saved_y = crtc->y;
356
357 /* Update crtc values up front so the driver can rely on them for mode
358 * setting.
359 */
360 crtc->mode = *mode;
361 crtc->x = x;
362 crtc->y = y;
363
364 /* Pass our mode to the connectors and the CRTC to give them a chance to
365 * adjust it according to limitations or connector properties, and also
366 * a chance to reject the mode entirely.
367 */
368 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
369
370 if (encoder->crtc != crtc)
371 continue;
372 encoder_funcs = encoder->helper_private;
373 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
374 adjusted_mode))) {
375 goto done;
376 }
377 }
378
379 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
380 goto done;
381 }
382 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
383
384 /* Prepare the encoders and CRTCs before setting the mode. */
385 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
386
387 if (encoder->crtc != crtc)
388 continue;
389 encoder_funcs = encoder->helper_private;
390 /* Disable the encoders as the first thing we do. */
391 encoder_funcs->prepare(encoder);
392 }
393
394 drm_crtc_prepare_encoders(dev);
395
396 crtc_funcs->prepare(crtc);
397
398 /* Set up the DPLL and any encoders state that needs to adjust or depend
399 * on the DPLL.
400 */
401 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
402 if (!ret)
403 goto done;
404
405 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
406
407 if (encoder->crtc != crtc)
408 continue;
409
410 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
411 encoder->base.id, drm_get_encoder_name(encoder),
412 mode->base.id, mode->name);
413 encoder_funcs = encoder->helper_private;
414 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
415 }
416
417 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
418 crtc_funcs->commit(crtc);
419
420 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
421
422 if (encoder->crtc != crtc)
423 continue;
424
425 encoder_funcs = encoder->helper_private;
426 encoder_funcs->commit(encoder);
427
428 }
429
430 /* Store real post-adjustment hardware mode. */
431 crtc->hwmode = *adjusted_mode;
432
433 /* Calculate and store various constants which
434 * are later needed by vblank and swap-completion
435 * timestamping. They are derived from true hwmode.
436 */
437 drm_calc_timestamping_constants(crtc);
438
439 /* FIXME: add subpixel order */
440done:
441 drm_mode_destroy(dev, adjusted_mode);
442 if (!ret) {
443 crtc->hwmode = saved_hwmode;
444 crtc->mode = saved_mode;
445 crtc->x = saved_x;
446 crtc->y = saved_y;
447 }
448
449 return ret;
450}
451EXPORT_SYMBOL(drm_crtc_helper_set_mode);
452
453
454/**
455 * drm_crtc_helper_set_config - set a new config from userspace
456 * @crtc: CRTC to setup
457 * @crtc_info: user provided configuration
458 * @new_mode: new mode to set
459 * @connector_set: set of connectors for the new config
460 * @fb: new framebuffer
461 *
462 * LOCKING:
463 * Caller must hold mode config lock.
464 *
465 * Setup a new configuration, provided by the user in @crtc_info, and enable
466 * it.
467 *
468 * RETURNS:
469 * Zero. (FIXME)
470 */
471int drm_crtc_helper_set_config(struct drm_mode_set *set)
472{
473 struct drm_device *dev;
474 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
475 struct drm_encoder *save_encoders, *new_encoder, *encoder;
476 struct drm_framebuffer *old_fb = NULL;
477 bool mode_changed = false; /* if true do a full mode set */
478 bool fb_changed = false; /* if true and !mode_changed just do a flip */
479 struct drm_connector *save_connectors, *connector;
480 int count = 0, ro, fail = 0;
481 struct drm_crtc_helper_funcs *crtc_funcs;
482 int ret = 0;
483 int i;
484
485 DRM_DEBUG_KMS("\n");
486
487 if (!set)
488 return -EINVAL;
489
490 if (!set->crtc)
491 return -EINVAL;
492
493 if (!set->crtc->helper_private)
494 return -EINVAL;
495
496 crtc_funcs = set->crtc->helper_private;
497
498 if (!set->mode)
499 set->fb = NULL;
500
501 if (set->fb) {
502 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
503 set->crtc->base.id, set->fb->base.id,
504 (int)set->num_connectors, set->x, set->y);
505 } else {
506 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
507 set->mode = NULL;
508 set->num_connectors = 0;
509 }
510
511 dev = set->crtc->dev;
512
513 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
514 * connector data. */
515 save_crtcs = kzalloc(dev->mode_config.num_crtc *
516 sizeof(struct drm_crtc), GFP_KERNEL);
517 if (!save_crtcs)
518 return -ENOMEM;
519
520 save_encoders = kzalloc(dev->mode_config.num_encoder *
521 sizeof(struct drm_encoder), GFP_KERNEL);
522 if (!save_encoders) {
523 kfree(save_crtcs);
524 return -ENOMEM;
525 }
526
527 save_connectors = kzalloc(dev->mode_config.num_connector *
528 sizeof(struct drm_connector), GFP_KERNEL);
529 if (!save_connectors) {
530 kfree(save_crtcs);
531 kfree(save_encoders);
532 return -ENOMEM;
533 }
534
535 /* Copy data. Note that driver private data is not affected.
536 * Should anything bad happen only the expected state is
537 * restored, not the drivers personal bookkeeping.
538 */
539 count = 0;
540 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
541 save_crtcs[count++] = *crtc;
542 }
543
544 count = 0;
545 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
546 save_encoders[count++] = *encoder;
547 }
548
549 count = 0;
550 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
551 save_connectors[count++] = *connector;
552 }
553
554 /* We should be able to check here if the fb has the same properties
555 * and then just flip_or_move it */
556 if (set->crtc->fb != set->fb) {
557 /* If we have no fb then treat it as a full mode set */
558 if (set->crtc->fb == NULL) {
559 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
560 mode_changed = true;
561 } else if (set->fb == NULL) {
562 mode_changed = true;
563 } else if (set->fb->depth != set->crtc->fb->depth) {
564 mode_changed = true;
565 } else if (set->fb->bits_per_pixel !=
566 set->crtc->fb->bits_per_pixel) {
567 mode_changed = true;
568 } else
569 fb_changed = true;
570 }
571
572 if (set->x != set->crtc->x || set->y != set->crtc->y)
573 fb_changed = true;
574
575 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
576 DRM_DEBUG_KMS("modes are different, full mode set\n");
577 drm_mode_debug_printmodeline(&set->crtc->mode);
578 drm_mode_debug_printmodeline(set->mode);
579 mode_changed = true;
580 }
581
582 /* a) traverse passed in connector list and get encoders for them */
583 count = 0;
584 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
585 struct drm_connector_helper_funcs *connector_funcs =
586 connector->helper_private;
587 new_encoder = connector->encoder;
588 for (ro = 0; ro < set->num_connectors; ro++) {
589 if (set->connectors[ro] == connector) {
590 new_encoder = connector_funcs->best_encoder(connector);
591 /* if we can't get an encoder for a connector
592 we are setting now - then fail */
593 if (new_encoder == NULL)
594 /* don't break so fail path works correct */
595 fail = 1;
596 break;
597 }
598 }
599
600 if (new_encoder != connector->encoder) {
601 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
602 mode_changed = true;
603 /* If the encoder is reused for another connector, then
604 * the appropriate crtc will be set later.
605 */
606 if (connector->encoder)
607 connector->encoder->crtc = NULL;
608 connector->encoder = new_encoder;
609 }
610 }
611
612 if (fail) {
613 ret = -EINVAL;
614 goto fail;
615 }
616
617 count = 0;
618 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
619 if (!connector->encoder)
620 continue;
621
622 if (connector->encoder->crtc == set->crtc)
623 new_crtc = NULL;
624 else
625 new_crtc = connector->encoder->crtc;
626
627 for (ro = 0; ro < set->num_connectors; ro++) {
628 if (set->connectors[ro] == connector)
629 new_crtc = set->crtc;
630 }
631
632 /* Make sure the new CRTC will work with the encoder */
633 if (new_crtc &&
634 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
635 ret = -EINVAL;
636 goto fail;
637 }
638 if (new_crtc != connector->encoder->crtc) {
639 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
640 mode_changed = true;
641 connector->encoder->crtc = new_crtc;
642 }
643 if (new_crtc) {
644 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
645 connector->base.id, drm_get_connector_name(connector),
646 new_crtc->base.id);
647 } else {
648 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
649 connector->base.id, drm_get_connector_name(connector));
650 }
651 }
652
653 /* mode_set_base is not a required function */
654 if (fb_changed && !crtc_funcs->mode_set_base)
655 mode_changed = true;
656
657 if (mode_changed) {
658 set->crtc->enabled = drm_helper_crtc_in_use(set->crtc);
659 if (set->crtc->enabled) {
660 DRM_DEBUG_KMS("attempting to set mode from"
661 " userspace\n");
662 drm_mode_debug_printmodeline(set->mode);
663 old_fb = set->crtc->fb;
664 set->crtc->fb = set->fb;
665 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
666 set->x, set->y,
667 old_fb)) {
668 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
669 set->crtc->base.id);
670 set->crtc->fb = old_fb;
671 ret = -EINVAL;
672 goto fail;
673 }
674 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
675 for (i = 0; i < set->num_connectors; i++) {
676 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
677 drm_get_connector_name(set->connectors[i]));
678 set->connectors[i]->dpms = DRM_MODE_DPMS_ON;
679 }
680 }
681 drm_helper_disable_unused_functions(dev);
682 } else if (fb_changed) {
683 set->crtc->x = set->x;
684 set->crtc->y = set->y;
685
686 old_fb = set->crtc->fb;
687 if (set->crtc->fb != set->fb)
688 set->crtc->fb = set->fb;
689 ret = crtc_funcs->mode_set_base(set->crtc,
690 set->x, set->y, old_fb);
691 if (ret != 0) {
692 set->crtc->fb = old_fb;
693 goto fail;
694 }
695 }
696
697 kfree(save_connectors);
698 kfree(save_encoders);
699 kfree(save_crtcs);
700 return 0;
701
702fail:
703 /* Restore all previous data. */
704 count = 0;
705 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
706 *crtc = save_crtcs[count++];
707 }
708
709 count = 0;
710 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
711 *encoder = save_encoders[count++];
712 }
713
714 count = 0;
715 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
716 *connector = save_connectors[count++];
717 }
718
719 kfree(save_connectors);
720 kfree(save_encoders);
721 kfree(save_crtcs);
722 return ret;
723}
724EXPORT_SYMBOL(drm_crtc_helper_set_config);
725
726static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
727{
728 int dpms = DRM_MODE_DPMS_OFF;
729 struct drm_connector *connector;
730 struct drm_device *dev = encoder->dev;
731
732 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
733 if (connector->encoder == encoder)
734 if (connector->dpms < dpms)
735 dpms = connector->dpms;
736 return dpms;
737}
738
739static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
740{
741 int dpms = DRM_MODE_DPMS_OFF;
742 struct drm_connector *connector;
743 struct drm_device *dev = crtc->dev;
744
745 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
746 if (connector->encoder && connector->encoder->crtc == crtc)
747 if (connector->dpms < dpms)
748 dpms = connector->dpms;
749 return dpms;
750}
751
752/**
753 * drm_helper_connector_dpms
754 * @connector affected connector
755 * @mode DPMS mode
756 *
757 * Calls the low-level connector DPMS function, then
758 * calls appropriate encoder and crtc DPMS functions as well
759 */
760void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
761{
762 struct drm_encoder *encoder = connector->encoder;
763 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
764 int old_dpms;
765
766 if (mode == connector->dpms)
767 return;
768
769 old_dpms = connector->dpms;
770 connector->dpms = mode;
771
772 /* from off to on, do crtc then encoder */
773 if (mode < old_dpms) {
774 if (crtc) {
775 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
776 if (crtc_funcs->dpms)
777 (*crtc_funcs->dpms) (crtc,
778 drm_helper_choose_crtc_dpms(crtc));
779 }
780 if (encoder) {
781 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
782 if (encoder_funcs->dpms)
783 (*encoder_funcs->dpms) (encoder,
784 drm_helper_choose_encoder_dpms(encoder));
785 }
786 }
787
788 /* from on to off, do encoder then crtc */
789 if (mode > old_dpms) {
790 if (encoder) {
791 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
792 if (encoder_funcs->dpms)
793 (*encoder_funcs->dpms) (encoder,
794 drm_helper_choose_encoder_dpms(encoder));
795 }
796 if (crtc) {
797 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
798 if (crtc_funcs->dpms)
799 (*crtc_funcs->dpms) (crtc,
800 drm_helper_choose_crtc_dpms(crtc));
801 }
802 }
803
804 return;
805}
806EXPORT_SYMBOL(drm_helper_connector_dpms);
807
808int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
809 struct drm_mode_fb_cmd *mode_cmd)
810{
811 fb->width = mode_cmd->width;
812 fb->height = mode_cmd->height;
813 fb->pitch = mode_cmd->pitch;
814 fb->bits_per_pixel = mode_cmd->bpp;
815 fb->depth = mode_cmd->depth;
816
817 return 0;
818}
819EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
820
821int drm_helper_resume_force_mode(struct drm_device *dev)
822{
823 struct drm_crtc *crtc;
824 struct drm_encoder *encoder;
825 struct drm_encoder_helper_funcs *encoder_funcs;
826 struct drm_crtc_helper_funcs *crtc_funcs;
827 int ret;
828
829 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
830
831 if (!crtc->enabled)
832 continue;
833
834 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
835 crtc->x, crtc->y, crtc->fb);
836
837 if (ret == false)
838 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
839
840 /* Turn off outputs that were already powered off */
841 if (drm_helper_choose_crtc_dpms(crtc)) {
842 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
843
844 if(encoder->crtc != crtc)
845 continue;
846
847 encoder_funcs = encoder->helper_private;
848 if (encoder_funcs->dpms)
849 (*encoder_funcs->dpms) (encoder,
850 drm_helper_choose_encoder_dpms(encoder));
851 }
852
853 crtc_funcs = crtc->helper_private;
854 if (crtc_funcs->dpms)
855 (*crtc_funcs->dpms) (crtc,
856 drm_helper_choose_crtc_dpms(crtc));
857 }
858 }
859 /* disable the unused connectors while restoring the modesetting */
860 drm_helper_disable_unused_functions(dev);
861 return 0;
862}
863EXPORT_SYMBOL(drm_helper_resume_force_mode);
864
865#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
866static void output_poll_execute(struct work_struct *work)
867{
868 struct delayed_work *delayed_work = to_delayed_work(work);
869 struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
870 struct drm_connector *connector;
871 enum drm_connector_status old_status;
872 bool repoll = false, changed = false;
873
874 if (!drm_kms_helper_poll)
875 return;
876
877 mutex_lock(&dev->mode_config.mutex);
878 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
879
880 /* if this is HPD or polled don't check it -
881 TV out for instance */
882 if (!connector->polled)
883 continue;
884
885 else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT))
886 repoll = true;
887
888 old_status = connector->status;
889 /* if we are connected and don't want to poll for disconnect
890 skip it */
891 if (old_status == connector_status_connected &&
892 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) &&
893 !(connector->polled & DRM_CONNECTOR_POLL_HPD))
894 continue;
895
896 connector->status = connector->funcs->detect(connector, false);
897 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
898 connector->base.id,
899 drm_get_connector_name(connector),
900 old_status, connector->status);
901 if (old_status != connector->status)
902 changed = true;
903 }
904
905 mutex_unlock(&dev->mode_config.mutex);
906
907 if (changed) {
908 /* send a uevent + call fbdev */
909 drm_sysfs_hotplug_event(dev);
910 if (dev->mode_config.funcs->output_poll_changed)
911 dev->mode_config.funcs->output_poll_changed(dev);
912 }
913
914 if (repoll)
915 queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
916}
917
918void drm_kms_helper_poll_disable(struct drm_device *dev)
919{
920 if (!dev->mode_config.poll_enabled)
921 return;
922 cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
923}
924EXPORT_SYMBOL(drm_kms_helper_poll_disable);
925
926void drm_kms_helper_poll_enable(struct drm_device *dev)
927{
928 bool poll = false;
929 struct drm_connector *connector;
930
931 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
932 return;
933
934 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
935 if (connector->polled)
936 poll = true;
937 }
938
939 if (poll)
940 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
941}
942EXPORT_SYMBOL(drm_kms_helper_poll_enable);
943
944void drm_kms_helper_poll_init(struct drm_device *dev)
945{
946 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
947 dev->mode_config.poll_enabled = true;
948
949 drm_kms_helper_poll_enable(dev);
950}
951EXPORT_SYMBOL(drm_kms_helper_poll_init);
952
953void drm_kms_helper_poll_fini(struct drm_device *dev)
954{
955 drm_kms_helper_poll_disable(dev);
956}
957EXPORT_SYMBOL(drm_kms_helper_poll_fini);
958
959void drm_helper_hpd_irq_event(struct drm_device *dev)
960{
961 if (!dev->mode_config.poll_enabled)
962 return;
963
964 /* kill timer and schedule immediate execution, this doesn't block */
965 cancel_delayed_work(&dev->mode_config.output_poll_work);
966 if (drm_kms_helper_poll)
967 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
968}
969EXPORT_SYMBOL(drm_helper_hpd_irq_event);
1/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 *
5 * DRM core CRTC related functions
6 *
7 * Permission to use, copy, modify, distribute, and sell this software and its
8 * documentation for any purpose is hereby granted without fee, provided that
9 * the above copyright notice appear in all copies and that both that copyright
10 * notice and this permission notice appear in supporting documentation, and
11 * that the name of the copyright holders not be used in advertising or
12 * publicity pertaining to distribution of the software without specific,
13 * written prior permission. The copyright holders make no representations
14 * about the suitability of this software for any purpose. It is provided "as
15 * is" without express or implied warranty.
16 *
17 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
19 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
22 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
23 * OF THIS SOFTWARE.
24 *
25 * Authors:
26 * Keith Packard
27 * Eric Anholt <eric@anholt.net>
28 * Dave Airlie <airlied@linux.ie>
29 * Jesse Barnes <jesse.barnes@intel.com>
30 */
31
32#include <linux/kernel.h>
33#include <linux/export.h>
34#include <linux/moduleparam.h>
35
36#include <drm/drmP.h>
37#include <drm/drm_atomic.h>
38#include <drm/drm_crtc.h>
39#include <drm/drm_fourcc.h>
40#include <drm/drm_crtc_helper.h>
41#include <drm/drm_fb_helper.h>
42#include <drm/drm_plane_helper.h>
43#include <drm/drm_atomic_helper.h>
44#include <drm/drm_edid.h>
45
46/**
47 * DOC: overview
48 *
49 * The CRTC modeset helper library provides a default set_config implementation
50 * in drm_crtc_helper_set_config(). Plus a few other convenience functions using
51 * the same callbacks which drivers can use to e.g. restore the modeset
52 * configuration on resume with drm_helper_resume_force_mode().
53 *
54 * Note that this helper library doesn't track the current power state of CRTCs
55 * and encoders. It can call callbacks like ->dpms() even though the hardware is
56 * already in the desired state. This deficiency has been fixed in the atomic
57 * helpers.
58 *
59 * The driver callbacks are mostly compatible with the atomic modeset helpers,
60 * except for the handling of the primary plane: Atomic helpers require that the
61 * primary plane is implemented as a real standalone plane and not directly tied
62 * to the CRTC state. For easier transition this library provides functions to
63 * implement the old semantics required by the CRTC helpers using the new plane
64 * and atomic helper callbacks.
65 *
66 * Drivers are strongly urged to convert to the atomic helpers (by way of first
67 * converting to the plane helpers). New drivers must not use these functions
68 * but need to implement the atomic interface instead, potentially using the
69 * atomic helpers for that.
70 *
71 * These legacy modeset helpers use the same function table structures as
72 * all other modesetting helpers. See the documentation for struct
73 * &drm_crtc_helper_funcs, struct &drm_encoder_helper_funcs and struct
74 * &drm_connector_helper_funcs.
75 */
76
77/**
78 * drm_helper_encoder_in_use - check if a given encoder is in use
79 * @encoder: encoder to check
80 *
81 * Checks whether @encoder is with the current mode setting output configuration
82 * in use by any connector. This doesn't mean that it is actually enabled since
83 * the DPMS state is tracked separately.
84 *
85 * Returns:
86 * True if @encoder is used, false otherwise.
87 */
88bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
89{
90 struct drm_connector *connector;
91 struct drm_device *dev = encoder->dev;
92
93 /*
94 * We can expect this mutex to be locked if we are not panicking.
95 * Locking is currently fubar in the panic handler.
96 */
97 if (!oops_in_progress) {
98 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
99 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
100 }
101
102 drm_for_each_connector(connector, dev)
103 if (connector->encoder == encoder)
104 return true;
105 return false;
106}
107EXPORT_SYMBOL(drm_helper_encoder_in_use);
108
109/**
110 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
111 * @crtc: CRTC to check
112 *
113 * Checks whether @crtc is with the current mode setting output configuration
114 * in use by any connector. This doesn't mean that it is actually enabled since
115 * the DPMS state is tracked separately.
116 *
117 * Returns:
118 * True if @crtc is used, false otherwise.
119 */
120bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
121{
122 struct drm_encoder *encoder;
123 struct drm_device *dev = crtc->dev;
124
125 /*
126 * We can expect this mutex to be locked if we are not panicking.
127 * Locking is currently fubar in the panic handler.
128 */
129 if (!oops_in_progress)
130 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
131
132 drm_for_each_encoder(encoder, dev)
133 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
134 return true;
135 return false;
136}
137EXPORT_SYMBOL(drm_helper_crtc_in_use);
138
139static void
140drm_encoder_disable(struct drm_encoder *encoder)
141{
142 const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
143
144 if (!encoder_funcs)
145 return;
146
147 drm_bridge_disable(encoder->bridge);
148
149 if (encoder_funcs->disable)
150 (*encoder_funcs->disable)(encoder);
151 else if (encoder_funcs->dpms)
152 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
153
154 drm_bridge_post_disable(encoder->bridge);
155}
156
157static void __drm_helper_disable_unused_functions(struct drm_device *dev)
158{
159 struct drm_encoder *encoder;
160 struct drm_crtc *crtc;
161
162 drm_warn_on_modeset_not_all_locked(dev);
163
164 drm_for_each_encoder(encoder, dev) {
165 if (!drm_helper_encoder_in_use(encoder)) {
166 drm_encoder_disable(encoder);
167 /* disconnect encoder from any connector */
168 encoder->crtc = NULL;
169 }
170 }
171
172 drm_for_each_crtc(crtc, dev) {
173 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
174 crtc->enabled = drm_helper_crtc_in_use(crtc);
175 if (!crtc->enabled) {
176 if (crtc_funcs->disable)
177 (*crtc_funcs->disable)(crtc);
178 else
179 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
180 crtc->primary->fb = NULL;
181 }
182 }
183}
184
185/**
186 * drm_helper_disable_unused_functions - disable unused objects
187 * @dev: DRM device
188 *
189 * This function walks through the entire mode setting configuration of @dev. It
190 * will remove any CRTC links of unused encoders and encoder links of
191 * disconnected connectors. Then it will disable all unused encoders and CRTCs
192 * either by calling their disable callback if available or by calling their
193 * dpms callback with DRM_MODE_DPMS_OFF.
194 *
195 * NOTE:
196 *
197 * This function is part of the legacy modeset helper library and will cause
198 * major confusion with atomic drivers. This is because atomic helpers guarantee
199 * to never call ->disable() hooks on a disabled function, or ->enable() hooks
200 * on an enabled functions. drm_helper_disable_unused_functions() on the other
201 * hand throws such guarantees into the wind and calls disable hooks
202 * unconditionally on unused functions.
203 */
204void drm_helper_disable_unused_functions(struct drm_device *dev)
205{
206 if (drm_core_check_feature(dev, DRIVER_ATOMIC))
207 DRM_ERROR("Called for atomic driver, this is not what you want.\n");
208
209 drm_modeset_lock_all(dev);
210 __drm_helper_disable_unused_functions(dev);
211 drm_modeset_unlock_all(dev);
212}
213EXPORT_SYMBOL(drm_helper_disable_unused_functions);
214
215/*
216 * Check the CRTC we're going to map each output to vs. its current
217 * CRTC. If they don't match, we have to disable the output and the CRTC
218 * since the driver will have to re-route things.
219 */
220static void
221drm_crtc_prepare_encoders(struct drm_device *dev)
222{
223 const struct drm_encoder_helper_funcs *encoder_funcs;
224 struct drm_encoder *encoder;
225
226 drm_for_each_encoder(encoder, dev) {
227 encoder_funcs = encoder->helper_private;
228 if (!encoder_funcs)
229 continue;
230
231 /* Disable unused encoders */
232 if (encoder->crtc == NULL)
233 drm_encoder_disable(encoder);
234 /* Disable encoders whose CRTC is about to change */
235 if (encoder_funcs->get_crtc &&
236 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
237 drm_encoder_disable(encoder);
238 }
239}
240
241/**
242 * drm_crtc_helper_set_mode - internal helper to set a mode
243 * @crtc: CRTC to program
244 * @mode: mode to use
245 * @x: horizontal offset into the surface
246 * @y: vertical offset into the surface
247 * @old_fb: old framebuffer, for cleanup
248 *
249 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
250 * to fixup or reject the mode prior to trying to set it. This is an internal
251 * helper that drivers could e.g. use to update properties that require the
252 * entire output pipe to be disabled and re-enabled in a new configuration. For
253 * example for changing whether audio is enabled on a hdmi link or for changing
254 * panel fitter or dither attributes. It is also called by the
255 * drm_crtc_helper_set_config() helper function to drive the mode setting
256 * sequence.
257 *
258 * Returns:
259 * True if the mode was set successfully, false otherwise.
260 */
261bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
262 struct drm_display_mode *mode,
263 int x, int y,
264 struct drm_framebuffer *old_fb)
265{
266 struct drm_device *dev = crtc->dev;
267 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
268 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
269 const struct drm_encoder_helper_funcs *encoder_funcs;
270 int saved_x, saved_y;
271 bool saved_enabled;
272 struct drm_encoder *encoder;
273 bool ret = true;
274
275 drm_warn_on_modeset_not_all_locked(dev);
276
277 saved_enabled = crtc->enabled;
278 crtc->enabled = drm_helper_crtc_in_use(crtc);
279 if (!crtc->enabled)
280 return true;
281
282 adjusted_mode = drm_mode_duplicate(dev, mode);
283 if (!adjusted_mode) {
284 crtc->enabled = saved_enabled;
285 return false;
286 }
287
288 saved_mode = crtc->mode;
289 saved_hwmode = crtc->hwmode;
290 saved_x = crtc->x;
291 saved_y = crtc->y;
292
293 /* Update crtc values up front so the driver can rely on them for mode
294 * setting.
295 */
296 crtc->mode = *mode;
297 crtc->x = x;
298 crtc->y = y;
299
300 /* Pass our mode to the connectors and the CRTC to give them a chance to
301 * adjust it according to limitations or connector properties, and also
302 * a chance to reject the mode entirely.
303 */
304 drm_for_each_encoder(encoder, dev) {
305
306 if (encoder->crtc != crtc)
307 continue;
308
309 encoder_funcs = encoder->helper_private;
310 if (!encoder_funcs)
311 continue;
312
313 ret = drm_bridge_mode_fixup(encoder->bridge,
314 mode, adjusted_mode);
315 if (!ret) {
316 DRM_DEBUG_KMS("Bridge fixup failed\n");
317 goto done;
318 }
319
320 encoder_funcs = encoder->helper_private;
321 if (encoder_funcs->mode_fixup) {
322 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
323 adjusted_mode))) {
324 DRM_DEBUG_KMS("Encoder fixup failed\n");
325 goto done;
326 }
327 }
328 }
329
330 if (crtc_funcs->mode_fixup) {
331 if (!(ret = crtc_funcs->mode_fixup(crtc, mode,
332 adjusted_mode))) {
333 DRM_DEBUG_KMS("CRTC fixup failed\n");
334 goto done;
335 }
336 }
337 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
338
339 crtc->hwmode = *adjusted_mode;
340
341 /* Prepare the encoders and CRTCs before setting the mode. */
342 drm_for_each_encoder(encoder, dev) {
343
344 if (encoder->crtc != crtc)
345 continue;
346
347 encoder_funcs = encoder->helper_private;
348 if (!encoder_funcs)
349 continue;
350
351 drm_bridge_disable(encoder->bridge);
352
353 /* Disable the encoders as the first thing we do. */
354 if (encoder_funcs->prepare)
355 encoder_funcs->prepare(encoder);
356
357 drm_bridge_post_disable(encoder->bridge);
358 }
359
360 drm_crtc_prepare_encoders(dev);
361
362 crtc_funcs->prepare(crtc);
363
364 /* Set up the DPLL and any encoders state that needs to adjust or depend
365 * on the DPLL.
366 */
367 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
368 if (!ret)
369 goto done;
370
371 drm_for_each_encoder(encoder, dev) {
372
373 if (encoder->crtc != crtc)
374 continue;
375
376 encoder_funcs = encoder->helper_private;
377 if (!encoder_funcs)
378 continue;
379
380 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
381 encoder->base.id, encoder->name,
382 mode->base.id, mode->name);
383 if (encoder_funcs->mode_set)
384 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
385
386 drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode);
387 }
388
389 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
390 crtc_funcs->commit(crtc);
391
392 drm_for_each_encoder(encoder, dev) {
393
394 if (encoder->crtc != crtc)
395 continue;
396
397 encoder_funcs = encoder->helper_private;
398 if (!encoder_funcs)
399 continue;
400
401 drm_bridge_pre_enable(encoder->bridge);
402
403 if (encoder_funcs->commit)
404 encoder_funcs->commit(encoder);
405
406 drm_bridge_enable(encoder->bridge);
407 }
408
409 /* Calculate and store various constants which
410 * are later needed by vblank and swap-completion
411 * timestamping. They are derived from true hwmode.
412 */
413 drm_calc_timestamping_constants(crtc, &crtc->hwmode);
414
415 /* FIXME: add subpixel order */
416done:
417 drm_mode_destroy(dev, adjusted_mode);
418 if (!ret) {
419 crtc->enabled = saved_enabled;
420 crtc->mode = saved_mode;
421 crtc->hwmode = saved_hwmode;
422 crtc->x = saved_x;
423 crtc->y = saved_y;
424 }
425
426 return ret;
427}
428EXPORT_SYMBOL(drm_crtc_helper_set_mode);
429
430static void
431drm_crtc_helper_disable(struct drm_crtc *crtc)
432{
433 struct drm_device *dev = crtc->dev;
434 struct drm_connector *connector;
435 struct drm_encoder *encoder;
436
437 /* Decouple all encoders and their attached connectors from this crtc */
438 drm_for_each_encoder(encoder, dev) {
439 if (encoder->crtc != crtc)
440 continue;
441
442 drm_for_each_connector(connector, dev) {
443 if (connector->encoder != encoder)
444 continue;
445
446 connector->encoder = NULL;
447
448 /*
449 * drm_helper_disable_unused_functions() ought to be
450 * doing this, but since we've decoupled the encoder
451 * from the connector above, the required connection
452 * between them is henceforth no longer available.
453 */
454 connector->dpms = DRM_MODE_DPMS_OFF;
455
456 /* we keep a reference while the encoder is bound */
457 drm_connector_unreference(connector);
458 }
459 }
460
461 __drm_helper_disable_unused_functions(dev);
462}
463
464/**
465 * drm_crtc_helper_set_config - set a new config from userspace
466 * @set: mode set configuration
467 *
468 * The drm_crtc_helper_set_config() helper function implements the set_config
469 * callback of struct &drm_crtc_funcs for drivers using the legacy CRTC helpers.
470 *
471 * It first tries to locate the best encoder for each connector by calling the
472 * connector ->best_encoder() (struct &drm_connector_helper_funcs) helper
473 * operation.
474 *
475 * After locating the appropriate encoders, the helper function will call the
476 * mode_fixup encoder and CRTC helper operations to adjust the requested mode,
477 * or reject it completely in which case an error will be returned to the
478 * application. If the new configuration after mode adjustment is identical to
479 * the current configuration the helper function will return without performing
480 * any other operation.
481 *
482 * If the adjusted mode is identical to the current mode but changes to the
483 * frame buffer need to be applied, the drm_crtc_helper_set_config() function
484 * will call the CRTC ->mode_set_base() (struct &drm_crtc_helper_funcs) helper
485 * operation.
486 *
487 * If the adjusted mode differs from the current mode, or if the
488 * ->mode_set_base() helper operation is not provided, the helper function
489 * performs a full mode set sequence by calling the ->prepare(), ->mode_set()
490 * and ->commit() CRTC and encoder helper operations, in that order.
491 * Alternatively it can also use the dpms and disable helper operations. For
492 * details see struct &drm_crtc_helper_funcs and struct
493 * &drm_encoder_helper_funcs.
494 *
495 * This function is deprecated. New drivers must implement atomic modeset
496 * support, for which this function is unsuitable. Instead drivers should use
497 * drm_atomic_helper_set_config().
498 *
499 * Returns:
500 * Returns 0 on success, negative errno numbers on failure.
501 */
502int drm_crtc_helper_set_config(struct drm_mode_set *set)
503{
504 struct drm_device *dev;
505 struct drm_crtc **save_encoder_crtcs, *new_crtc;
506 struct drm_encoder **save_connector_encoders, *new_encoder, *encoder;
507 bool mode_changed = false; /* if true do a full mode set */
508 bool fb_changed = false; /* if true and !mode_changed just do a flip */
509 struct drm_connector *connector;
510 int count = 0, ro, fail = 0;
511 const struct drm_crtc_helper_funcs *crtc_funcs;
512 struct drm_mode_set save_set;
513 int ret;
514 int i;
515
516 DRM_DEBUG_KMS("\n");
517
518 BUG_ON(!set);
519 BUG_ON(!set->crtc);
520 BUG_ON(!set->crtc->helper_private);
521
522 /* Enforce sane interface api - has been abused by the fb helper. */
523 BUG_ON(!set->mode && set->fb);
524 BUG_ON(set->fb && set->num_connectors == 0);
525
526 crtc_funcs = set->crtc->helper_private;
527
528 if (!set->mode)
529 set->fb = NULL;
530
531 if (set->fb) {
532 DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n",
533 set->crtc->base.id, set->crtc->name,
534 set->fb->base.id,
535 (int)set->num_connectors, set->x, set->y);
536 } else {
537 DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n",
538 set->crtc->base.id, set->crtc->name);
539 drm_crtc_helper_disable(set->crtc);
540 return 0;
541 }
542
543 dev = set->crtc->dev;
544
545 drm_warn_on_modeset_not_all_locked(dev);
546
547 /*
548 * Allocate space for the backup of all (non-pointer) encoder and
549 * connector data.
550 */
551 save_encoder_crtcs = kzalloc(dev->mode_config.num_encoder *
552 sizeof(struct drm_crtc *), GFP_KERNEL);
553 if (!save_encoder_crtcs)
554 return -ENOMEM;
555
556 save_connector_encoders = kzalloc(dev->mode_config.num_connector *
557 sizeof(struct drm_encoder *), GFP_KERNEL);
558 if (!save_connector_encoders) {
559 kfree(save_encoder_crtcs);
560 return -ENOMEM;
561 }
562
563 /*
564 * Copy data. Note that driver private data is not affected.
565 * Should anything bad happen only the expected state is
566 * restored, not the drivers personal bookkeeping.
567 */
568 count = 0;
569 drm_for_each_encoder(encoder, dev) {
570 save_encoder_crtcs[count++] = encoder->crtc;
571 }
572
573 count = 0;
574 drm_for_each_connector(connector, dev) {
575 save_connector_encoders[count++] = connector->encoder;
576 }
577
578 save_set.crtc = set->crtc;
579 save_set.mode = &set->crtc->mode;
580 save_set.x = set->crtc->x;
581 save_set.y = set->crtc->y;
582 save_set.fb = set->crtc->primary->fb;
583
584 /* We should be able to check here if the fb has the same properties
585 * and then just flip_or_move it */
586 if (set->crtc->primary->fb != set->fb) {
587 /* If we have no fb then treat it as a full mode set */
588 if (set->crtc->primary->fb == NULL) {
589 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
590 mode_changed = true;
591 } else if (set->fb->pixel_format !=
592 set->crtc->primary->fb->pixel_format) {
593 mode_changed = true;
594 } else
595 fb_changed = true;
596 }
597
598 if (set->x != set->crtc->x || set->y != set->crtc->y)
599 fb_changed = true;
600
601 if (!drm_mode_equal(set->mode, &set->crtc->mode)) {
602 DRM_DEBUG_KMS("modes are different, full mode set\n");
603 drm_mode_debug_printmodeline(&set->crtc->mode);
604 drm_mode_debug_printmodeline(set->mode);
605 mode_changed = true;
606 }
607
608 /* take a reference on all unbound connectors in set, reuse the
609 * already taken reference for bound connectors
610 */
611 for (ro = 0; ro < set->num_connectors; ro++) {
612 if (set->connectors[ro]->encoder)
613 continue;
614 drm_connector_reference(set->connectors[ro]);
615 }
616
617 /* a) traverse passed in connector list and get encoders for them */
618 count = 0;
619 drm_for_each_connector(connector, dev) {
620 const struct drm_connector_helper_funcs *connector_funcs =
621 connector->helper_private;
622 new_encoder = connector->encoder;
623 for (ro = 0; ro < set->num_connectors; ro++) {
624 if (set->connectors[ro] == connector) {
625 new_encoder = connector_funcs->best_encoder(connector);
626 /* if we can't get an encoder for a connector
627 we are setting now - then fail */
628 if (new_encoder == NULL)
629 /* don't break so fail path works correct */
630 fail = 1;
631
632 if (connector->dpms != DRM_MODE_DPMS_ON) {
633 DRM_DEBUG_KMS("connector dpms not on, full mode switch\n");
634 mode_changed = true;
635 }
636
637 break;
638 }
639 }
640
641 if (new_encoder != connector->encoder) {
642 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
643 mode_changed = true;
644 /* If the encoder is reused for another connector, then
645 * the appropriate crtc will be set later.
646 */
647 if (connector->encoder)
648 connector->encoder->crtc = NULL;
649 connector->encoder = new_encoder;
650 }
651 }
652
653 if (fail) {
654 ret = -EINVAL;
655 goto fail;
656 }
657
658 count = 0;
659 drm_for_each_connector(connector, dev) {
660 if (!connector->encoder)
661 continue;
662
663 if (connector->encoder->crtc == set->crtc)
664 new_crtc = NULL;
665 else
666 new_crtc = connector->encoder->crtc;
667
668 for (ro = 0; ro < set->num_connectors; ro++) {
669 if (set->connectors[ro] == connector)
670 new_crtc = set->crtc;
671 }
672
673 /* Make sure the new CRTC will work with the encoder */
674 if (new_crtc &&
675 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
676 ret = -EINVAL;
677 goto fail;
678 }
679 if (new_crtc != connector->encoder->crtc) {
680 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
681 mode_changed = true;
682 connector->encoder->crtc = new_crtc;
683 }
684 if (new_crtc) {
685 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n",
686 connector->base.id, connector->name,
687 new_crtc->base.id, new_crtc->name);
688 } else {
689 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
690 connector->base.id, connector->name);
691 }
692 }
693
694 /* mode_set_base is not a required function */
695 if (fb_changed && !crtc_funcs->mode_set_base)
696 mode_changed = true;
697
698 if (mode_changed) {
699 if (drm_helper_crtc_in_use(set->crtc)) {
700 DRM_DEBUG_KMS("attempting to set mode from"
701 " userspace\n");
702 drm_mode_debug_printmodeline(set->mode);
703 set->crtc->primary->fb = set->fb;
704 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
705 set->x, set->y,
706 save_set.fb)) {
707 DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n",
708 set->crtc->base.id, set->crtc->name);
709 set->crtc->primary->fb = save_set.fb;
710 ret = -EINVAL;
711 goto fail;
712 }
713 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
714 for (i = 0; i < set->num_connectors; i++) {
715 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
716 set->connectors[i]->name);
717 set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
718 }
719 }
720 __drm_helper_disable_unused_functions(dev);
721 } else if (fb_changed) {
722 set->crtc->x = set->x;
723 set->crtc->y = set->y;
724 set->crtc->primary->fb = set->fb;
725 ret = crtc_funcs->mode_set_base(set->crtc,
726 set->x, set->y, save_set.fb);
727 if (ret != 0) {
728 set->crtc->x = save_set.x;
729 set->crtc->y = save_set.y;
730 set->crtc->primary->fb = save_set.fb;
731 goto fail;
732 }
733 }
734
735 kfree(save_connector_encoders);
736 kfree(save_encoder_crtcs);
737 return 0;
738
739fail:
740 /* Restore all previous data. */
741 count = 0;
742 drm_for_each_encoder(encoder, dev) {
743 encoder->crtc = save_encoder_crtcs[count++];
744 }
745
746 count = 0;
747 drm_for_each_connector(connector, dev) {
748 connector->encoder = save_connector_encoders[count++];
749 }
750
751 /* after fail drop reference on all unbound connectors in set, let
752 * bound connectors keep their reference
753 */
754 for (ro = 0; ro < set->num_connectors; ro++) {
755 if (set->connectors[ro]->encoder)
756 continue;
757 drm_connector_unreference(set->connectors[ro]);
758 }
759
760 /* Try to restore the config */
761 if (mode_changed &&
762 !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
763 save_set.y, save_set.fb))
764 DRM_ERROR("failed to restore config after modeset failure\n");
765
766 kfree(save_connector_encoders);
767 kfree(save_encoder_crtcs);
768 return ret;
769}
770EXPORT_SYMBOL(drm_crtc_helper_set_config);
771
772static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
773{
774 int dpms = DRM_MODE_DPMS_OFF;
775 struct drm_connector *connector;
776 struct drm_device *dev = encoder->dev;
777
778 drm_for_each_connector(connector, dev)
779 if (connector->encoder == encoder)
780 if (connector->dpms < dpms)
781 dpms = connector->dpms;
782 return dpms;
783}
784
785/* Helper which handles bridge ordering around encoder dpms */
786static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode)
787{
788 struct drm_bridge *bridge = encoder->bridge;
789 const struct drm_encoder_helper_funcs *encoder_funcs;
790
791 encoder_funcs = encoder->helper_private;
792 if (!encoder_funcs)
793 return;
794
795 if (mode == DRM_MODE_DPMS_ON)
796 drm_bridge_pre_enable(bridge);
797 else
798 drm_bridge_disable(bridge);
799
800 if (encoder_funcs->dpms)
801 encoder_funcs->dpms(encoder, mode);
802
803 if (mode == DRM_MODE_DPMS_ON)
804 drm_bridge_enable(bridge);
805 else
806 drm_bridge_post_disable(bridge);
807}
808
809static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
810{
811 int dpms = DRM_MODE_DPMS_OFF;
812 struct drm_connector *connector;
813 struct drm_device *dev = crtc->dev;
814
815 drm_for_each_connector(connector, dev)
816 if (connector->encoder && connector->encoder->crtc == crtc)
817 if (connector->dpms < dpms)
818 dpms = connector->dpms;
819 return dpms;
820}
821
822/**
823 * drm_helper_connector_dpms() - connector dpms helper implementation
824 * @connector: affected connector
825 * @mode: DPMS mode
826 *
827 * The drm_helper_connector_dpms() helper function implements the ->dpms()
828 * callback of struct &drm_connector_funcs for drivers using the legacy CRTC helpers.
829 *
830 * This is the main helper function provided by the CRTC helper framework for
831 * implementing the DPMS connector attribute. It computes the new desired DPMS
832 * state for all encoders and CRTCs in the output mesh and calls the ->dpms()
833 * callbacks provided by the driver in struct &drm_crtc_helper_funcs and struct
834 * &drm_encoder_helper_funcs appropriately.
835 *
836 * This function is deprecated. New drivers must implement atomic modeset
837 * support, for which this function is unsuitable. Instead drivers should use
838 * drm_atomic_helper_connector_dpms().
839 *
840 * Returns:
841 * Always returns 0.
842 */
843int drm_helper_connector_dpms(struct drm_connector *connector, int mode)
844{
845 struct drm_encoder *encoder = connector->encoder;
846 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
847 int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF;
848
849 if (mode == connector->dpms)
850 return 0;
851
852 old_dpms = connector->dpms;
853 connector->dpms = mode;
854
855 if (encoder)
856 encoder_dpms = drm_helper_choose_encoder_dpms(encoder);
857
858 /* from off to on, do crtc then encoder */
859 if (mode < old_dpms) {
860 if (crtc) {
861 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
862 if (crtc_funcs->dpms)
863 (*crtc_funcs->dpms) (crtc,
864 drm_helper_choose_crtc_dpms(crtc));
865 }
866 if (encoder)
867 drm_helper_encoder_dpms(encoder, encoder_dpms);
868 }
869
870 /* from on to off, do encoder then crtc */
871 if (mode > old_dpms) {
872 if (encoder)
873 drm_helper_encoder_dpms(encoder, encoder_dpms);
874 if (crtc) {
875 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
876 if (crtc_funcs->dpms)
877 (*crtc_funcs->dpms) (crtc,
878 drm_helper_choose_crtc_dpms(crtc));
879 }
880 }
881
882 return 0;
883}
884EXPORT_SYMBOL(drm_helper_connector_dpms);
885
886/**
887 * drm_helper_resume_force_mode - force-restore mode setting configuration
888 * @dev: drm_device which should be restored
889 *
890 * Drivers which use the mode setting helpers can use this function to
891 * force-restore the mode setting configuration e.g. on resume or when something
892 * else might have trampled over the hw state (like some overzealous old BIOSen
893 * tended to do).
894 *
895 * This helper doesn't provide a error return value since restoring the old
896 * config should never fail due to resource allocation issues since the driver
897 * has successfully set the restored configuration already. Hence this should
898 * boil down to the equivalent of a few dpms on calls, which also don't provide
899 * an error code.
900 *
901 * Drivers where simply restoring an old configuration again might fail (e.g.
902 * due to slight differences in allocating shared resources when the
903 * configuration is restored in a different order than when userspace set it up)
904 * need to use their own restore logic.
905 *
906 * This function is deprecated. New drivers should implement atomic mode-
907 * setting and use the atomic suspend/resume helpers.
908 *
909 * See also:
910 * drm_atomic_helper_suspend(), drm_atomic_helper_resume()
911 */
912void drm_helper_resume_force_mode(struct drm_device *dev)
913{
914 struct drm_crtc *crtc;
915 struct drm_encoder *encoder;
916 const struct drm_crtc_helper_funcs *crtc_funcs;
917 int encoder_dpms;
918 bool ret;
919
920 drm_modeset_lock_all(dev);
921 drm_for_each_crtc(crtc, dev) {
922
923 if (!crtc->enabled)
924 continue;
925
926 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
927 crtc->x, crtc->y, crtc->primary->fb);
928
929 /* Restoring the old config should never fail! */
930 if (ret == false)
931 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
932
933 /* Turn off outputs that were already powered off */
934 if (drm_helper_choose_crtc_dpms(crtc)) {
935 drm_for_each_encoder(encoder, dev) {
936
937 if(encoder->crtc != crtc)
938 continue;
939
940 encoder_dpms = drm_helper_choose_encoder_dpms(
941 encoder);
942
943 drm_helper_encoder_dpms(encoder, encoder_dpms);
944 }
945
946 crtc_funcs = crtc->helper_private;
947 if (crtc_funcs->dpms)
948 (*crtc_funcs->dpms) (crtc,
949 drm_helper_choose_crtc_dpms(crtc));
950 }
951 }
952
953 /* disable the unused connectors while restoring the modesetting */
954 __drm_helper_disable_unused_functions(dev);
955 drm_modeset_unlock_all(dev);
956}
957EXPORT_SYMBOL(drm_helper_resume_force_mode);
958
959/**
960 * drm_helper_crtc_mode_set - mode_set implementation for atomic plane helpers
961 * @crtc: DRM CRTC
962 * @mode: DRM display mode which userspace requested
963 * @adjusted_mode: DRM display mode adjusted by ->mode_fixup callbacks
964 * @x: x offset of the CRTC scanout area on the underlying framebuffer
965 * @y: y offset of the CRTC scanout area on the underlying framebuffer
966 * @old_fb: previous framebuffer
967 *
968 * This function implements a callback useable as the ->mode_set callback
969 * required by the CRTC helpers. Besides the atomic plane helper functions for
970 * the primary plane the driver must also provide the ->mode_set_nofb callback
971 * to set up the CRTC.
972 *
973 * This is a transitional helper useful for converting drivers to the atomic
974 * interfaces.
975 */
976int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
977 struct drm_display_mode *adjusted_mode, int x, int y,
978 struct drm_framebuffer *old_fb)
979{
980 struct drm_crtc_state *crtc_state;
981 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
982 int ret;
983
984 if (crtc->funcs->atomic_duplicate_state)
985 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
986 else {
987 if (!crtc->state)
988 drm_atomic_helper_crtc_reset(crtc);
989
990 crtc_state = drm_atomic_helper_crtc_duplicate_state(crtc);
991 }
992
993 if (!crtc_state)
994 return -ENOMEM;
995
996 crtc_state->planes_changed = true;
997 crtc_state->mode_changed = true;
998 ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
999 if (ret)
1000 goto out;
1001 drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode);
1002
1003 if (crtc_funcs->atomic_check) {
1004 ret = crtc_funcs->atomic_check(crtc, crtc_state);
1005 if (ret)
1006 goto out;
1007 }
1008
1009 swap(crtc->state, crtc_state);
1010
1011 crtc_funcs->mode_set_nofb(crtc);
1012
1013 ret = drm_helper_crtc_mode_set_base(crtc, x, y, old_fb);
1014
1015out:
1016 if (crtc_state) {
1017 if (crtc->funcs->atomic_destroy_state)
1018 crtc->funcs->atomic_destroy_state(crtc, crtc_state);
1019 else
1020 drm_atomic_helper_crtc_destroy_state(crtc, crtc_state);
1021 }
1022
1023 return ret;
1024}
1025EXPORT_SYMBOL(drm_helper_crtc_mode_set);
1026
1027/**
1028 * drm_helper_crtc_mode_set_base - mode_set_base implementation for atomic plane helpers
1029 * @crtc: DRM CRTC
1030 * @x: x offset of the CRTC scanout area on the underlying framebuffer
1031 * @y: y offset of the CRTC scanout area on the underlying framebuffer
1032 * @old_fb: previous framebuffer
1033 *
1034 * This function implements a callback useable as the ->mode_set_base used
1035 * required by the CRTC helpers. The driver must provide the atomic plane helper
1036 * functions for the primary plane.
1037 *
1038 * This is a transitional helper useful for converting drivers to the atomic
1039 * interfaces.
1040 */
1041int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
1042 struct drm_framebuffer *old_fb)
1043{
1044 struct drm_plane_state *plane_state;
1045 struct drm_plane *plane = crtc->primary;
1046
1047 if (plane->funcs->atomic_duplicate_state)
1048 plane_state = plane->funcs->atomic_duplicate_state(plane);
1049 else {
1050 if (!plane->state)
1051 drm_atomic_helper_plane_reset(plane);
1052
1053 plane_state = drm_atomic_helper_plane_duplicate_state(plane);
1054 }
1055 if (!plane_state)
1056 return -ENOMEM;
1057 plane_state->plane = plane;
1058
1059 plane_state->crtc = crtc;
1060 drm_atomic_set_fb_for_plane(plane_state, crtc->primary->fb);
1061 plane_state->crtc_x = 0;
1062 plane_state->crtc_y = 0;
1063 plane_state->crtc_h = crtc->mode.vdisplay;
1064 plane_state->crtc_w = crtc->mode.hdisplay;
1065 plane_state->src_x = x << 16;
1066 plane_state->src_y = y << 16;
1067 plane_state->src_h = crtc->mode.vdisplay << 16;
1068 plane_state->src_w = crtc->mode.hdisplay << 16;
1069
1070 return drm_plane_helper_commit(plane, plane_state, old_fb);
1071}
1072EXPORT_SYMBOL(drm_helper_crtc_mode_set_base);