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path: root/drivers/gpu/drm/drm_crtc_helper.c
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-rw-r--r--drivers/gpu/drm/drm_crtc_helper.c826
1 files changed, 826 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
new file mode 100644
index 000000000000..d8a982b71296
--- /dev/null
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -0,0 +1,826 @@
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
36/*
37 * Detailed mode info for 800x600@60Hz
38 */
39static struct drm_display_mode std_mode[] = {
40 { DRM_MODE("800x600", DRM_MODE_TYPE_DEFAULT, 40000, 800, 840,
41 968, 1056, 0, 600, 601, 605, 628, 0,
42 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
43};
44
45/**
46 * drm_helper_probe_connector_modes - get complete set of display modes
47 * @dev: DRM device
48 * @maxX: max width for modes
49 * @maxY: max height for modes
50 *
51 * LOCKING:
52 * Caller must hold mode config lock.
53 *
54 * Based on @dev's mode_config layout, scan all the connectors and try to detect
55 * modes on them. Modes will first be added to the connector's probed_modes
56 * list, then culled (based on validity and the @maxX, @maxY parameters) and
57 * put into the normal modes list.
58 *
59 * Intended to be used either at bootup time or when major configuration
60 * changes have occurred.
61 *
62 * FIXME: take into account monitor limits
63 */
64void drm_helper_probe_single_connector_modes(struct drm_connector *connector,
65 uint32_t maxX, uint32_t maxY)
66{
67 struct drm_device *dev = connector->dev;
68 struct drm_display_mode *mode, *t;
69 struct drm_connector_helper_funcs *connector_funcs =
70 connector->helper_private;
71 int ret;
72
73 DRM_DEBUG("%s\n", drm_get_connector_name(connector));
74 /* set all modes to the unverified state */
75 list_for_each_entry_safe(mode, t, &connector->modes, head)
76 mode->status = MODE_UNVERIFIED;
77
78 connector->status = connector->funcs->detect(connector);
79
80 if (connector->status == connector_status_disconnected) {
81 DRM_DEBUG("%s is disconnected\n",
82 drm_get_connector_name(connector));
83 /* TODO set EDID to NULL */
84 return;
85 }
86
87 ret = (*connector_funcs->get_modes)(connector);
88
89 if (ret) {
90 drm_mode_connector_list_update(connector);
91 }
92
93 if (maxX && maxY)
94 drm_mode_validate_size(dev, &connector->modes, maxX,
95 maxY, 0);
96 list_for_each_entry_safe(mode, t, &connector->modes, head) {
97 if (mode->status == MODE_OK)
98 mode->status = connector_funcs->mode_valid(connector,
99 mode);
100 }
101
102
103 drm_mode_prune_invalid(dev, &connector->modes, true);
104
105 if (list_empty(&connector->modes)) {
106 struct drm_display_mode *stdmode;
107
108 DRM_DEBUG("No valid modes on %s\n",
109 drm_get_connector_name(connector));
110
111 /* Should we do this here ???
112 * When no valid EDID modes are available we end up
113 * here and bailed in the past, now we add a standard
114 * 640x480@60Hz mode and carry on.
115 */
116 stdmode = drm_mode_duplicate(dev, &std_mode[0]);
117 drm_mode_probed_add(connector, stdmode);
118 drm_mode_list_concat(&connector->probed_modes,
119 &connector->modes);
120
121 DRM_DEBUG("Adding standard 640x480 @ 60Hz to %s\n",
122 drm_get_connector_name(connector));
123 }
124
125 drm_mode_sort(&connector->modes);
126
127 DRM_DEBUG("Probed modes for %s\n", drm_get_connector_name(connector));
128 list_for_each_entry_safe(mode, t, &connector->modes, head) {
129 mode->vrefresh = drm_mode_vrefresh(mode);
130
131 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
132 drm_mode_debug_printmodeline(mode);
133 }
134}
135EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
136
137void drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX,
138 uint32_t maxY)
139{
140 struct drm_connector *connector;
141
142 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
143 drm_helper_probe_single_connector_modes(connector, maxX, maxY);
144 }
145}
146EXPORT_SYMBOL(drm_helper_probe_connector_modes);
147
148
149/**
150 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
151 * @crtc: CRTC to check
152 *
153 * LOCKING:
154 * Caller must hold mode config lock.
155 *
156 * Walk @crtc's DRM device's mode_config and see if it's in use.
157 *
158 * RETURNS:
159 * True if @crtc is part of the mode_config, false otherwise.
160 */
161bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
162{
163 struct drm_encoder *encoder;
164 struct drm_device *dev = crtc->dev;
165 /* FIXME: Locking around list access? */
166 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
167 if (encoder->crtc == crtc)
168 return true;
169 return false;
170}
171EXPORT_SYMBOL(drm_helper_crtc_in_use);
172
173/**
174 * drm_disable_unused_functions - disable unused objects
175 * @dev: DRM device
176 *
177 * LOCKING:
178 * Caller must hold mode config lock.
179 *
180 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
181 * by calling its dpms function, which should power it off.
182 */
183void drm_helper_disable_unused_functions(struct drm_device *dev)
184{
185 struct drm_encoder *encoder;
186 struct drm_encoder_helper_funcs *encoder_funcs;
187 struct drm_crtc *crtc;
188
189 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
190 encoder_funcs = encoder->helper_private;
191 if (!encoder->crtc)
192 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
193 }
194
195 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
196 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
197 crtc->enabled = drm_helper_crtc_in_use(crtc);
198 if (!crtc->enabled) {
199 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
200 crtc->fb = NULL;
201 }
202 }
203}
204EXPORT_SYMBOL(drm_helper_disable_unused_functions);
205
206static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *connector, int width, int height)
207{
208 struct drm_display_mode *mode;
209
210 list_for_each_entry(mode, &connector->modes, head) {
211 if (drm_mode_width(mode) > width ||
212 drm_mode_height(mode) > height)
213 continue;
214 if (mode->type & DRM_MODE_TYPE_PREFERRED)
215 return mode;
216 }
217 return NULL;
218}
219
220static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
221{
222 bool enable;
223
224 if (strict) {
225 enable = connector->status == connector_status_connected;
226 } else {
227 enable = connector->status != connector_status_disconnected;
228 }
229 return enable;
230}
231
232static void drm_enable_connectors(struct drm_device *dev, bool *enabled)
233{
234 bool any_enabled = false;
235 struct drm_connector *connector;
236 int i = 0;
237
238 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
239 enabled[i] = drm_connector_enabled(connector, true);
240 any_enabled |= enabled[i];
241 i++;
242 }
243
244 if (any_enabled)
245 return;
246
247 i = 0;
248 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
249 enabled[i] = drm_connector_enabled(connector, false);
250 i++;
251 }
252}
253
254static bool drm_target_preferred(struct drm_device *dev,
255 struct drm_display_mode **modes,
256 bool *enabled, int width, int height)
257{
258 struct drm_connector *connector;
259 int i = 0;
260
261 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
262
263 if (enabled[i] == false) {
264 i++;
265 continue;
266 }
267
268 modes[i] = drm_has_preferred_mode(connector, width, height);
269 if (!modes[i]) {
270 list_for_each_entry(modes[i], &connector->modes, head)
271 break;
272 }
273 i++;
274 }
275 return true;
276}
277
278static int drm_pick_crtcs(struct drm_device *dev,
279 struct drm_crtc **best_crtcs,
280 struct drm_display_mode **modes,
281 int n, int width, int height)
282{
283 int c, o;
284 struct drm_connector *connector;
285 struct drm_connector_helper_funcs *connector_funcs;
286 struct drm_encoder *encoder;
287 struct drm_crtc *best_crtc;
288 int my_score, best_score, score;
289 struct drm_crtc **crtcs, *crtc;
290
291 if (n == dev->mode_config.num_connector)
292 return 0;
293 c = 0;
294 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
295 if (c == n)
296 break;
297 c++;
298 }
299
300 best_crtcs[n] = NULL;
301 best_crtc = NULL;
302 best_score = drm_pick_crtcs(dev, best_crtcs, modes, n+1, width, height);
303 if (modes[n] == NULL)
304 return best_score;
305
306 crtcs = kmalloc(dev->mode_config.num_connector *
307 sizeof(struct drm_crtc *), GFP_KERNEL);
308 if (!crtcs)
309 return best_score;
310
311 my_score = 1;
312 if (connector->status == connector_status_connected)
313 my_score++;
314 if (drm_has_preferred_mode(connector, width, height))
315 my_score++;
316
317 connector_funcs = connector->helper_private;
318 encoder = connector_funcs->best_encoder(connector);
319 if (!encoder)
320 goto out;
321
322 connector->encoder = encoder;
323
324 /* select a crtc for this connector and then attempt to configure
325 remaining connectors */
326 c = 0;
327 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
328
329 if ((connector->encoder->possible_crtcs & (1 << c)) == 0) {
330 c++;
331 continue;
332 }
333
334 for (o = 0; o < n; o++)
335 if (best_crtcs[o] == crtc)
336 break;
337
338 if (o < n) {
339 /* ignore cloning for now */
340 c++;
341 continue;
342 }
343
344 crtcs[n] = crtc;
345 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_crtc *));
346 score = my_score + drm_pick_crtcs(dev, crtcs, modes, n + 1,
347 width, height);
348 if (score > best_score) {
349 best_crtc = crtc;
350 best_score = score;
351 memcpy(best_crtcs, crtcs,
352 dev->mode_config.num_connector *
353 sizeof(struct drm_crtc *));
354 }
355 c++;
356 }
357out:
358 kfree(crtcs);
359 return best_score;
360}
361
362static void drm_setup_crtcs(struct drm_device *dev)
363{
364 struct drm_crtc **crtcs;
365 struct drm_display_mode **modes;
366 struct drm_encoder *encoder;
367 struct drm_connector *connector;
368 bool *enabled;
369 int width, height;
370 int i, ret;
371
372 width = dev->mode_config.max_width;
373 height = dev->mode_config.max_height;
374
375 /* clean out all the encoder/crtc combos */
376 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
377 encoder->crtc = NULL;
378 }
379
380 crtcs = kcalloc(dev->mode_config.num_connector,
381 sizeof(struct drm_crtc *), GFP_KERNEL);
382 modes = kcalloc(dev->mode_config.num_connector,
383 sizeof(struct drm_display_mode *), GFP_KERNEL);
384 enabled = kcalloc(dev->mode_config.num_connector,
385 sizeof(bool), GFP_KERNEL);
386
387 drm_enable_connectors(dev, enabled);
388
389 ret = drm_target_preferred(dev, modes, enabled, width, height);
390 if (!ret)
391 DRM_ERROR("Unable to find initial modes\n");
392
393 drm_pick_crtcs(dev, crtcs, modes, 0, width, height);
394
395 i = 0;
396 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
397 struct drm_display_mode *mode = modes[i];
398 struct drm_crtc *crtc = crtcs[i];
399
400 if (connector->encoder == NULL) {
401 i++;
402 continue;
403 }
404
405 if (mode && crtc) {
406 crtc->desired_mode = mode;
407 connector->encoder->crtc = crtc;
408 } else
409 connector->encoder->crtc = NULL;
410 i++;
411 }
412
413 kfree(crtcs);
414 kfree(modes);
415 kfree(enabled);
416}
417/**
418 * drm_crtc_set_mode - set a mode
419 * @crtc: CRTC to program
420 * @mode: mode to use
421 * @x: width of mode
422 * @y: height of mode
423 *
424 * LOCKING:
425 * Caller must hold mode config lock.
426 *
427 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
428 * to fixup or reject the mode prior to trying to set it.
429 *
430 * RETURNS:
431 * True if the mode was set successfully, or false otherwise.
432 */
433bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
434 struct drm_display_mode *mode,
435 int x, int y,
436 struct drm_framebuffer *old_fb)
437{
438 struct drm_device *dev = crtc->dev;
439 struct drm_display_mode *adjusted_mode, saved_mode;
440 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
441 struct drm_encoder_helper_funcs *encoder_funcs;
442 int saved_x, saved_y;
443 struct drm_encoder *encoder;
444 bool ret = true;
445
446 adjusted_mode = drm_mode_duplicate(dev, mode);
447
448 crtc->enabled = drm_helper_crtc_in_use(crtc);
449
450 if (!crtc->enabled)
451 return true;
452
453 saved_mode = crtc->mode;
454 saved_x = crtc->x;
455 saved_y = crtc->y;
456
457 /* Update crtc values up front so the driver can rely on them for mode
458 * setting.
459 */
460 crtc->mode = *mode;
461 crtc->x = x;
462 crtc->y = y;
463
464 if (drm_mode_equal(&saved_mode, &crtc->mode)) {
465 if (saved_x != crtc->x || saved_y != crtc->y) {
466 crtc_funcs->mode_set_base(crtc, crtc->x, crtc->y,
467 old_fb);
468 goto done;
469 }
470 }
471
472 /* Pass our mode to the connectors and the CRTC to give them a chance to
473 * adjust it according to limitations or connector properties, and also
474 * a chance to reject the mode entirely.
475 */
476 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
477
478 if (encoder->crtc != crtc)
479 continue;
480 encoder_funcs = encoder->helper_private;
481 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
482 adjusted_mode))) {
483 goto done;
484 }
485 }
486
487 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
488 goto done;
489 }
490
491 /* Prepare the encoders and CRTCs before setting the mode. */
492 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
493
494 if (encoder->crtc != crtc)
495 continue;
496 encoder_funcs = encoder->helper_private;
497 /* Disable the encoders as the first thing we do. */
498 encoder_funcs->prepare(encoder);
499 }
500
501 crtc_funcs->prepare(crtc);
502
503 /* Set up the DPLL and any encoders state that needs to adjust or depend
504 * on the DPLL.
505 */
506 crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
507
508 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
509
510 if (encoder->crtc != crtc)
511 continue;
512
513 DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder),
514 mode->name, mode->base.id);
515 encoder_funcs = encoder->helper_private;
516 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
517 }
518
519 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
520 crtc_funcs->commit(crtc);
521
522 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
523
524 if (encoder->crtc != crtc)
525 continue;
526
527 encoder_funcs = encoder->helper_private;
528 encoder_funcs->commit(encoder);
529
530 }
531
532 /* XXX free adjustedmode */
533 drm_mode_destroy(dev, adjusted_mode);
534 /* FIXME: add subpixel order */
535done:
536 if (!ret) {
537 crtc->mode = saved_mode;
538 crtc->x = saved_x;
539 crtc->y = saved_y;
540 }
541
542 return ret;
543}
544EXPORT_SYMBOL(drm_crtc_helper_set_mode);
545
546
547/**
548 * drm_crtc_helper_set_config - set a new config from userspace
549 * @crtc: CRTC to setup
550 * @crtc_info: user provided configuration
551 * @new_mode: new mode to set
552 * @connector_set: set of connectors for the new config
553 * @fb: new framebuffer
554 *
555 * LOCKING:
556 * Caller must hold mode config lock.
557 *
558 * Setup a new configuration, provided by the user in @crtc_info, and enable
559 * it.
560 *
561 * RETURNS:
562 * Zero. (FIXME)
563 */
564int drm_crtc_helper_set_config(struct drm_mode_set *set)
565{
566 struct drm_device *dev;
567 struct drm_crtc **save_crtcs, *new_crtc;
568 struct drm_encoder **save_encoders, *new_encoder;
569 struct drm_framebuffer *old_fb;
570 bool save_enabled;
571 bool changed = false;
572 bool flip_or_move = false;
573 struct drm_connector *connector;
574 int count = 0, ro, fail = 0;
575 struct drm_crtc_helper_funcs *crtc_funcs;
576 int ret = 0;
577
578 DRM_DEBUG("\n");
579
580 if (!set)
581 return -EINVAL;
582
583 if (!set->crtc)
584 return -EINVAL;
585
586 if (!set->crtc->helper_private)
587 return -EINVAL;
588
589 crtc_funcs = set->crtc->helper_private;
590
591 DRM_DEBUG("crtc: %p %d fb: %p connectors: %p num_connectors: %d (x, y) (%i, %i)\n",
592 set->crtc, set->crtc->base.id, set->fb, set->connectors,
593 (int)set->num_connectors, set->x, set->y);
594
595 dev = set->crtc->dev;
596
597 /* save previous config */
598 save_enabled = set->crtc->enabled;
599
600 /* this is meant to be num_connector not num_crtc */
601 save_crtcs = kzalloc(dev->mode_config.num_connector *
602 sizeof(struct drm_crtc *), GFP_KERNEL);
603 if (!save_crtcs)
604 return -ENOMEM;
605
606 save_encoders = kzalloc(dev->mode_config.num_connector *
607 sizeof(struct drm_encoders *), GFP_KERNEL);
608 if (!save_encoders) {
609 kfree(save_crtcs);
610 return -ENOMEM;
611 }
612
613 /* We should be able to check here if the fb has the same properties
614 * and then just flip_or_move it */
615 if (set->crtc->fb != set->fb) {
616 /* if we have no fb then its a change not a flip */
617 if (set->crtc->fb == NULL)
618 changed = true;
619 else
620 flip_or_move = true;
621 }
622
623 if (set->x != set->crtc->x || set->y != set->crtc->y)
624 flip_or_move = true;
625
626 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
627 DRM_DEBUG("modes are different\n");
628 drm_mode_debug_printmodeline(&set->crtc->mode);
629 drm_mode_debug_printmodeline(set->mode);
630 changed = true;
631 }
632
633 /* a) traverse passed in connector list and get encoders for them */
634 count = 0;
635 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
636 struct drm_connector_helper_funcs *connector_funcs =
637 connector->helper_private;
638 save_encoders[count++] = connector->encoder;
639 new_encoder = connector->encoder;
640 for (ro = 0; ro < set->num_connectors; ro++) {
641 if (set->connectors[ro] == connector) {
642 new_encoder = connector_funcs->best_encoder(connector);
643 /* if we can't get an encoder for a connector
644 we are setting now - then fail */
645 if (new_encoder == NULL)
646 /* don't break so fail path works correct */
647 fail = 1;
648 break;
649 }
650 }
651
652 if (new_encoder != connector->encoder) {
653 changed = true;
654 connector->encoder = new_encoder;
655 }
656 }
657
658 if (fail) {
659 ret = -EINVAL;
660 goto fail_no_encoder;
661 }
662
663 count = 0;
664 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
665 if (!connector->encoder)
666 continue;
667
668 save_crtcs[count++] = connector->encoder->crtc;
669
670 if (connector->encoder->crtc == set->crtc)
671 new_crtc = NULL;
672 else
673 new_crtc = connector->encoder->crtc;
674
675 for (ro = 0; ro < set->num_connectors; ro++) {
676 if (set->connectors[ro] == connector)
677 new_crtc = set->crtc;
678 }
679 if (new_crtc != connector->encoder->crtc) {
680 changed = true;
681 connector->encoder->crtc = new_crtc;
682 }
683 }
684
685 /* mode_set_base is not a required function */
686 if (flip_or_move && !crtc_funcs->mode_set_base)
687 changed = true;
688
689 if (changed) {
690 old_fb = set->crtc->fb;
691 set->crtc->fb = set->fb;
692 set->crtc->enabled = (set->mode != NULL);
693 if (set->mode != NULL) {
694 DRM_DEBUG("attempting to set mode from userspace\n");
695 drm_mode_debug_printmodeline(set->mode);
696 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
697 set->x, set->y,
698 old_fb)) {
699 ret = -EINVAL;
700 goto fail_set_mode;
701 }
702 /* TODO are these needed? */
703 set->crtc->desired_x = set->x;
704 set->crtc->desired_y = set->y;
705 set->crtc->desired_mode = set->mode;
706 }
707 drm_helper_disable_unused_functions(dev);
708 } else if (flip_or_move) {
709 old_fb = set->crtc->fb;
710 if (set->crtc->fb != set->fb)
711 set->crtc->fb = set->fb;
712 crtc_funcs->mode_set_base(set->crtc, set->x, set->y, old_fb);
713 }
714
715 kfree(save_encoders);
716 kfree(save_crtcs);
717 return 0;
718
719fail_set_mode:
720 set->crtc->enabled = save_enabled;
721 count = 0;
722 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
723 connector->encoder->crtc = save_crtcs[count++];
724fail_no_encoder:
725 kfree(save_crtcs);
726 count = 0;
727 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
728 connector->encoder = save_encoders[count++];
729 }
730 kfree(save_encoders);
731 return ret;
732}
733EXPORT_SYMBOL(drm_crtc_helper_set_config);
734
735bool drm_helper_plugged_event(struct drm_device *dev)
736{
737 DRM_DEBUG("\n");
738
739 drm_helper_probe_connector_modes(dev, dev->mode_config.max_width,
740 dev->mode_config.max_height);
741
742 drm_setup_crtcs(dev);
743
744 /* alert the driver fb layer */
745 dev->mode_config.funcs->fb_changed(dev);
746
747 /* FIXME: send hotplug event */
748 return true;
749}
750/**
751 * drm_initial_config - setup a sane initial connector configuration
752 * @dev: DRM device
753 * @can_grow: this configuration is growable
754 *
755 * LOCKING:
756 * Called at init time, must take mode config lock.
757 *
758 * Scan the CRTCs and connectors and try to put together an initial setup.
759 * At the moment, this is a cloned configuration across all heads with
760 * a new framebuffer object as the backing store.
761 *
762 * RETURNS:
763 * Zero if everything went ok, nonzero otherwise.
764 */
765bool drm_helper_initial_config(struct drm_device *dev, bool can_grow)
766{
767 int ret = false;
768
769 drm_helper_plugged_event(dev);
770 return ret;
771}
772EXPORT_SYMBOL(drm_helper_initial_config);
773
774/**
775 * drm_hotplug_stage_two
776 * @dev DRM device
777 * @connector hotpluged connector
778 *
779 * LOCKING.
780 * Caller must hold mode config lock, function might grab struct lock.
781 *
782 * Stage two of a hotplug.
783 *
784 * RETURNS:
785 * Zero on success, errno on failure.
786 */
787int drm_helper_hotplug_stage_two(struct drm_device *dev)
788{
789 drm_helper_plugged_event(dev);
790
791 return 0;
792}
793EXPORT_SYMBOL(drm_helper_hotplug_stage_two);
794
795int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
796 struct drm_mode_fb_cmd *mode_cmd)
797{
798 fb->width = mode_cmd->width;
799 fb->height = mode_cmd->height;
800 fb->pitch = mode_cmd->pitch;
801 fb->bits_per_pixel = mode_cmd->bpp;
802 fb->depth = mode_cmd->depth;
803
804 return 0;
805}
806EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
807
808int drm_helper_resume_force_mode(struct drm_device *dev)
809{
810 struct drm_crtc *crtc;
811 int ret;
812
813 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
814
815 if (!crtc->enabled)
816 continue;
817
818 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
819 crtc->x, crtc->y, crtc->fb);
820
821 if (ret == false)
822 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
823 }
824 return 0;
825}
826EXPORT_SYMBOL(drm_helper_resume_force_mode);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-28 06:05:28 -0500