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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/export.h>
33#include <linux/moduleparam.h>
34
35#include "drmP.h"
36#include "drm_crtc.h"
37#include "drm_fourcc.h"
38#include "drm_crtc_helper.h"
39#include "drm_fb_helper.h"
40#include "drm_edid.h"
41
42static bool drm_kms_helper_poll = true;
43module_param_named(poll, drm_kms_helper_poll, bool, 0600);
44
45static void drm_mode_validate_flag(struct drm_connector *connector,
46 int flags)
47{
48 struct drm_display_mode *mode;
49
50 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
51 return;
52
53 list_for_each_entry(mode, &connector->modes, head) {
54 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
55 !(flags & DRM_MODE_FLAG_INTERLACE))
56 mode->status = MODE_NO_INTERLACE;
57 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
58 !(flags & DRM_MODE_FLAG_DBLSCAN))
59 mode->status = MODE_NO_DBLESCAN;
60 }
61
62 return;
63}
64
65/**
66 * drm_helper_probe_single_connector_modes - get complete set of display modes
67 * @dev: DRM device
68 * @maxX: max width for modes
69 * @maxY: max height for modes
70 *
71 * LOCKING:
72 * Caller must hold mode config lock.
73 *
74 * Based on @dev's mode_config layout, scan all the connectors and try to detect
75 * modes on them. Modes will first be added to the connector's probed_modes
76 * list, then culled (based on validity and the @maxX, @maxY parameters) and
77 * put into the normal modes list.
78 *
79 * Intended to be used either at bootup time or when major configuration
80 * changes have occurred.
81 *
82 * FIXME: take into account monitor limits
83 *
84 * RETURNS:
85 * Number of modes found on @connector.
86 */
87int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
88 uint32_t maxX, uint32_t maxY)
89{
90 struct drm_device *dev = connector->dev;
91 struct drm_display_mode *mode;
92 struct drm_connector_helper_funcs *connector_funcs =
93 connector->helper_private;
94 int count = 0;
95 int mode_flags = 0;
96
97 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
98 drm_get_connector_name(connector));
99 /* set all modes to the unverified state */
100 list_for_each_entry(mode, &connector->modes, head)
101 mode->status = MODE_UNVERIFIED;
102
103 if (connector->force) {
104 if (connector->force == DRM_FORCE_ON)
105 connector->status = connector_status_connected;
106 else
107 connector->status = connector_status_disconnected;
108 if (connector->funcs->force)
109 connector->funcs->force(connector);
110 } else {
111 connector->status = connector->funcs->detect(connector, true);
112 drm_kms_helper_poll_enable(dev);
113 }
114
115 if (connector->status == connector_status_disconnected) {
116 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
117 connector->base.id, drm_get_connector_name(connector));
118 drm_mode_connector_update_edid_property(connector, NULL);
119 goto prune;
120 }
121
122#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
123 count = drm_load_edid_firmware(connector);
124 if (count == 0)
125#endif
126 count = (*connector_funcs->get_modes)(connector);
127
128 if (count == 0 && connector->status == connector_status_connected)
129 count = drm_add_modes_noedid(connector, 1024, 768);
130 if (count == 0)
131 goto prune;
132
133 drm_mode_connector_list_update(connector);
134
135 if (maxX && maxY)
136 drm_mode_validate_size(dev, &connector->modes, maxX,
137 maxY, 0);
138
139 if (connector->interlace_allowed)
140 mode_flags |= DRM_MODE_FLAG_INTERLACE;
141 if (connector->doublescan_allowed)
142 mode_flags |= DRM_MODE_FLAG_DBLSCAN;
143 drm_mode_validate_flag(connector, mode_flags);
144
145 list_for_each_entry(mode, &connector->modes, head) {
146 if (mode->status == MODE_OK)
147 mode->status = connector_funcs->mode_valid(connector,
148 mode);
149 }
150
151prune:
152 drm_mode_prune_invalid(dev, &connector->modes, true);
153
154 if (list_empty(&connector->modes))
155 return 0;
156
157 drm_mode_sort(&connector->modes);
158
159 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
160 drm_get_connector_name(connector));
161 list_for_each_entry(mode, &connector->modes, head) {
162 mode->vrefresh = drm_mode_vrefresh(mode);
163
164 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
165 drm_mode_debug_printmodeline(mode);
166 }
167
168 return count;
169}
170EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
171
172/**
173 * drm_helper_encoder_in_use - check if a given encoder is in use
174 * @encoder: encoder to check
175 *
176 * LOCKING:
177 * Caller must hold mode config lock.
178 *
179 * Walk @encoders's DRM device's mode_config and see if it's in use.
180 *
181 * RETURNS:
182 * True if @encoder is part of the mode_config, false otherwise.
183 */
184bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
185{
186 struct drm_connector *connector;
187 struct drm_device *dev = encoder->dev;
188 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
189 if (connector->encoder == encoder)
190 return true;
191 return false;
192}
193EXPORT_SYMBOL(drm_helper_encoder_in_use);
194
195/**
196 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
197 * @crtc: CRTC to check
198 *
199 * LOCKING:
200 * Caller must hold mode config lock.
201 *
202 * Walk @crtc's DRM device's mode_config and see if it's in use.
203 *
204 * RETURNS:
205 * True if @crtc is part of the mode_config, false otherwise.
206 */
207bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
208{
209 struct drm_encoder *encoder;
210 struct drm_device *dev = crtc->dev;
211 /* FIXME: Locking around list access? */
212 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
213 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
214 return true;
215 return false;
216}
217EXPORT_SYMBOL(drm_helper_crtc_in_use);
218
219static void
220drm_encoder_disable(struct drm_encoder *encoder)
221{
222 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
223
224 if (encoder_funcs->disable)
225 (*encoder_funcs->disable)(encoder);
226 else
227 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
228}
229
230/**
231 * drm_helper_disable_unused_functions - disable unused objects
232 * @dev: DRM device
233 *
234 * LOCKING:
235 * Caller must hold mode config lock.
236 *
237 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
238 * by calling its dpms function, which should power it off.
239 */
240void drm_helper_disable_unused_functions(struct drm_device *dev)
241{
242 struct drm_encoder *encoder;
243 struct drm_connector *connector;
244 struct drm_crtc *crtc;
245
246 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
247 if (!connector->encoder)
248 continue;
249 if (connector->status == connector_status_disconnected)
250 connector->encoder = NULL;
251 }
252
253 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
254 if (!drm_helper_encoder_in_use(encoder)) {
255 drm_encoder_disable(encoder);
256 /* disconnector encoder from any connector */
257 encoder->crtc = NULL;
258 }
259 }
260
261 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
262 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
263 crtc->enabled = drm_helper_crtc_in_use(crtc);
264 if (!crtc->enabled) {
265 if (crtc_funcs->disable)
266 (*crtc_funcs->disable)(crtc);
267 else
268 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
269 crtc->fb = NULL;
270 }
271 }
272}
273EXPORT_SYMBOL(drm_helper_disable_unused_functions);
274
275/**
276 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
277 * @encoder: encoder to test
278 * @crtc: crtc to test
279 *
280 * Return false if @encoder can't be driven by @crtc, true otherwise.
281 */
282static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
283 struct drm_crtc *crtc)
284{
285 struct drm_device *dev;
286 struct drm_crtc *tmp;
287 int crtc_mask = 1;
288
289 WARN(!crtc, "checking null crtc?\n");
290
291 dev = crtc->dev;
292
293 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
294 if (tmp == crtc)
295 break;
296 crtc_mask <<= 1;
297 }
298
299 if (encoder->possible_crtcs & crtc_mask)
300 return true;
301 return false;
302}
303
304/*
305 * Check the CRTC we're going to map each output to vs. its current
306 * CRTC. If they don't match, we have to disable the output and the CRTC
307 * since the driver will have to re-route things.
308 */
309static void
310drm_crtc_prepare_encoders(struct drm_device *dev)
311{
312 struct drm_encoder_helper_funcs *encoder_funcs;
313 struct drm_encoder *encoder;
314
315 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
316 encoder_funcs = encoder->helper_private;
317 /* Disable unused encoders */
318 if (encoder->crtc == NULL)
319 drm_encoder_disable(encoder);
320 /* Disable encoders whose CRTC is about to change */
321 if (encoder_funcs->get_crtc &&
322 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
323 drm_encoder_disable(encoder);
324 }
325}
326
327/**
328 * drm_crtc_set_mode - set a mode
329 * @crtc: CRTC to program
330 * @mode: mode to use
331 * @x: width of mode
332 * @y: height of mode
333 *
334 * LOCKING:
335 * Caller must hold mode config lock.
336 *
337 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
338 * to fixup or reject the mode prior to trying to set it.
339 *
340 * RETURNS:
341 * True if the mode was set successfully, or false otherwise.
342 */
343bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
344 struct drm_display_mode *mode,
345 int x, int y,
346 struct drm_framebuffer *old_fb)
347{
348 struct drm_device *dev = crtc->dev;
349 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
350 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
351 struct drm_encoder_helper_funcs *encoder_funcs;
352 int saved_x, saved_y;
353 struct drm_encoder *encoder;
354 bool ret = true;
355
356 crtc->enabled = drm_helper_crtc_in_use(crtc);
357 if (!crtc->enabled)
358 return true;
359
360 adjusted_mode = drm_mode_duplicate(dev, mode);
361 if (!adjusted_mode)
362 return false;
363
364 saved_hwmode = crtc->hwmode;
365 saved_mode = crtc->mode;
366 saved_x = crtc->x;
367 saved_y = crtc->y;
368
369 /* Update crtc values up front so the driver can rely on them for mode
370 * setting.
371 */
372 crtc->mode = *mode;
373 crtc->x = x;
374 crtc->y = y;
375
376 /* Pass our mode to the connectors and the CRTC to give them a chance to
377 * adjust it according to limitations or connector properties, and also
378 * a chance to reject the mode entirely.
379 */
380 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
381
382 if (encoder->crtc != crtc)
383 continue;
384 encoder_funcs = encoder->helper_private;
385 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
386 adjusted_mode))) {
387 DRM_DEBUG_KMS("Encoder fixup failed\n");
388 goto done;
389 }
390 }
391
392 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
393 DRM_DEBUG_KMS("CRTC fixup failed\n");
394 goto done;
395 }
396 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
397
398 /* Prepare the encoders and CRTCs before setting the mode. */
399 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
400
401 if (encoder->crtc != crtc)
402 continue;
403 encoder_funcs = encoder->helper_private;
404 /* Disable the encoders as the first thing we do. */
405 encoder_funcs->prepare(encoder);
406 }
407
408 drm_crtc_prepare_encoders(dev);
409
410 crtc_funcs->prepare(crtc);
411
412 /* Set up the DPLL and any encoders state that needs to adjust or depend
413 * on the DPLL.
414 */
415 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
416 if (!ret)
417 goto done;
418
419 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
420
421 if (encoder->crtc != crtc)
422 continue;
423
424 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
425 encoder->base.id, drm_get_encoder_name(encoder),
426 mode->base.id, mode->name);
427 encoder_funcs = encoder->helper_private;
428 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
429 }
430
431 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
432 crtc_funcs->commit(crtc);
433
434 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
435
436 if (encoder->crtc != crtc)
437 continue;
438
439 encoder_funcs = encoder->helper_private;
440 encoder_funcs->commit(encoder);
441
442 }
443
444 /* Store real post-adjustment hardware mode. */
445 crtc->hwmode = *adjusted_mode;
446
447 /* Calculate and store various constants which
448 * are later needed by vblank and swap-completion
449 * timestamping. They are derived from true hwmode.
450 */
451 drm_calc_timestamping_constants(crtc);
452
453 /* FIXME: add subpixel order */
454done:
455 drm_mode_destroy(dev, adjusted_mode);
456 if (!ret) {
457 crtc->hwmode = saved_hwmode;
458 crtc->mode = saved_mode;
459 crtc->x = saved_x;
460 crtc->y = saved_y;
461 }
462
463 return ret;
464}
465EXPORT_SYMBOL(drm_crtc_helper_set_mode);
466
467
468static int
469drm_crtc_helper_disable(struct drm_crtc *crtc)
470{
471 struct drm_device *dev = crtc->dev;
472 struct drm_connector *connector;
473 struct drm_encoder *encoder;
474
475 /* Decouple all encoders and their attached connectors from this crtc */
476 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
477 if (encoder->crtc != crtc)
478 continue;
479
480 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
481 if (connector->encoder != encoder)
482 continue;
483
484 connector->encoder = NULL;
485 }
486 }
487
488 drm_helper_disable_unused_functions(dev);
489 return 0;
490}
491
492/**
493 * drm_crtc_helper_set_config - set a new config from userspace
494 * @crtc: CRTC to setup
495 * @crtc_info: user provided configuration
496 * @new_mode: new mode to set
497 * @connector_set: set of connectors for the new config
498 * @fb: new framebuffer
499 *
500 * LOCKING:
501 * Caller must hold mode config lock.
502 *
503 * Setup a new configuration, provided by the user in @crtc_info, and enable
504 * it.
505 *
506 * RETURNS:
507 * Zero. (FIXME)
508 */
509int drm_crtc_helper_set_config(struct drm_mode_set *set)
510{
511 struct drm_device *dev;
512 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
513 struct drm_encoder *save_encoders, *new_encoder, *encoder;
514 struct drm_framebuffer *old_fb = NULL;
515 bool mode_changed = false; /* if true do a full mode set */
516 bool fb_changed = false; /* if true and !mode_changed just do a flip */
517 struct drm_connector *save_connectors, *connector;
518 int count = 0, ro, fail = 0;
519 struct drm_crtc_helper_funcs *crtc_funcs;
520 struct drm_mode_set save_set;
521 int ret;
522 int i;
523
524 DRM_DEBUG_KMS("\n");
525
526 if (!set)
527 return -EINVAL;
528
529 if (!set->crtc)
530 return -EINVAL;
531
532 if (!set->crtc->helper_private)
533 return -EINVAL;
534
535 crtc_funcs = set->crtc->helper_private;
536
537 if (!set->mode)
538 set->fb = NULL;
539
540 if (set->fb) {
541 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
542 set->crtc->base.id, set->fb->base.id,
543 (int)set->num_connectors, set->x, set->y);
544 } else {
545 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
546 return drm_crtc_helper_disable(set->crtc);
547 }
548
549 dev = set->crtc->dev;
550
551 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
552 * connector data. */
553 save_crtcs = kzalloc(dev->mode_config.num_crtc *
554 sizeof(struct drm_crtc), GFP_KERNEL);
555 if (!save_crtcs)
556 return -ENOMEM;
557
558 save_encoders = kzalloc(dev->mode_config.num_encoder *
559 sizeof(struct drm_encoder), GFP_KERNEL);
560 if (!save_encoders) {
561 kfree(save_crtcs);
562 return -ENOMEM;
563 }
564
565 save_connectors = kzalloc(dev->mode_config.num_connector *
566 sizeof(struct drm_connector), GFP_KERNEL);
567 if (!save_connectors) {
568 kfree(save_crtcs);
569 kfree(save_encoders);
570 return -ENOMEM;
571 }
572
573 /* Copy data. Note that driver private data is not affected.
574 * Should anything bad happen only the expected state is
575 * restored, not the drivers personal bookkeeping.
576 */
577 count = 0;
578 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
579 save_crtcs[count++] = *crtc;
580 }
581
582 count = 0;
583 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
584 save_encoders[count++] = *encoder;
585 }
586
587 count = 0;
588 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
589 save_connectors[count++] = *connector;
590 }
591
592 save_set.crtc = set->crtc;
593 save_set.mode = &set->crtc->mode;
594 save_set.x = set->crtc->x;
595 save_set.y = set->crtc->y;
596 save_set.fb = set->crtc->fb;
597
598 /* We should be able to check here if the fb has the same properties
599 * and then just flip_or_move it */
600 if (set->crtc->fb != set->fb) {
601 /* If we have no fb then treat it as a full mode set */
602 if (set->crtc->fb == NULL) {
603 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
604 mode_changed = true;
605 } else if (set->fb == NULL) {
606 mode_changed = true;
607 } else if (set->fb->depth != set->crtc->fb->depth) {
608 mode_changed = true;
609 } else if (set->fb->bits_per_pixel !=
610 set->crtc->fb->bits_per_pixel) {
611 mode_changed = true;
612 } else
613 fb_changed = true;
614 }
615
616 if (set->x != set->crtc->x || set->y != set->crtc->y)
617 fb_changed = true;
618
619 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
620 DRM_DEBUG_KMS("modes are different, full mode set\n");
621 drm_mode_debug_printmodeline(&set->crtc->mode);
622 drm_mode_debug_printmodeline(set->mode);
623 mode_changed = true;
624 }
625
626 /* a) traverse passed in connector list and get encoders for them */
627 count = 0;
628 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
629 struct drm_connector_helper_funcs *connector_funcs =
630 connector->helper_private;
631 new_encoder = connector->encoder;
632 for (ro = 0; ro < set->num_connectors; ro++) {
633 if (set->connectors[ro] == connector) {
634 new_encoder = connector_funcs->best_encoder(connector);
635 /* if we can't get an encoder for a connector
636 we are setting now - then fail */
637 if (new_encoder == NULL)
638 /* don't break so fail path works correct */
639 fail = 1;
640 break;
641 }
642 }
643
644 if (new_encoder != connector->encoder) {
645 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
646 mode_changed = true;
647 /* If the encoder is reused for another connector, then
648 * the appropriate crtc will be set later.
649 */
650 if (connector->encoder)
651 connector->encoder->crtc = NULL;
652 connector->encoder = new_encoder;
653 }
654 }
655
656 if (fail) {
657 ret = -EINVAL;
658 goto fail;
659 }
660
661 count = 0;
662 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
663 if (!connector->encoder)
664 continue;
665
666 if (connector->encoder->crtc == set->crtc)
667 new_crtc = NULL;
668 else
669 new_crtc = connector->encoder->crtc;
670
671 for (ro = 0; ro < set->num_connectors; ro++) {
672 if (set->connectors[ro] == connector)
673 new_crtc = set->crtc;
674 }
675
676 /* Make sure the new CRTC will work with the encoder */
677 if (new_crtc &&
678 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
679 ret = -EINVAL;
680 goto fail;
681 }
682 if (new_crtc != connector->encoder->crtc) {
683 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
684 mode_changed = true;
685 connector->encoder->crtc = new_crtc;
686 }
687 if (new_crtc) {
688 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
689 connector->base.id, drm_get_connector_name(connector),
690 new_crtc->base.id);
691 } else {
692 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
693 connector->base.id, drm_get_connector_name(connector));
694 }
695 }
696
697 /* mode_set_base is not a required function */
698 if (fb_changed && !crtc_funcs->mode_set_base)
699 mode_changed = true;
700
701 if (mode_changed) {
702 set->crtc->enabled = drm_helper_crtc_in_use(set->crtc);
703 if (set->crtc->enabled) {
704 DRM_DEBUG_KMS("attempting to set mode from"
705 " userspace\n");
706 drm_mode_debug_printmodeline(set->mode);
707 old_fb = set->crtc->fb;
708 set->crtc->fb = set->fb;
709 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
710 set->x, set->y,
711 old_fb)) {
712 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
713 set->crtc->base.id);
714 set->crtc->fb = old_fb;
715 ret = -EINVAL;
716 goto fail;
717 }
718 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
719 for (i = 0; i < set->num_connectors; i++) {
720 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
721 drm_get_connector_name(set->connectors[i]));
722 set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
723 }
724 }
725 drm_helper_disable_unused_functions(dev);
726 } else if (fb_changed) {
727 set->crtc->x = set->x;
728 set->crtc->y = set->y;
729
730 old_fb = set->crtc->fb;
731 if (set->crtc->fb != set->fb)
732 set->crtc->fb = set->fb;
733 ret = crtc_funcs->mode_set_base(set->crtc,
734 set->x, set->y, old_fb);
735 if (ret != 0) {
736 set->crtc->fb = old_fb;
737 goto fail;
738 }
739 }
740
741 kfree(save_connectors);
742 kfree(save_encoders);
743 kfree(save_crtcs);
744 return 0;
745
746fail:
747 /* Restore all previous data. */
748 count = 0;
749 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
750 *crtc = save_crtcs[count++];
751 }
752
753 count = 0;
754 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
755 *encoder = save_encoders[count++];
756 }
757
758 count = 0;
759 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
760 *connector = save_connectors[count++];
761 }
762
763 /* Try to restore the config */
764 if (mode_changed &&
765 !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
766 save_set.y, save_set.fb))
767 DRM_ERROR("failed to restore config after modeset failure\n");
768
769 kfree(save_connectors);
770 kfree(save_encoders);
771 kfree(save_crtcs);
772 return ret;
773}
774EXPORT_SYMBOL(drm_crtc_helper_set_config);
775
776static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
777{
778 int dpms = DRM_MODE_DPMS_OFF;
779 struct drm_connector *connector;
780 struct drm_device *dev = encoder->dev;
781
782 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
783 if (connector->encoder == encoder)
784 if (connector->dpms < dpms)
785 dpms = connector->dpms;
786 return dpms;
787}
788
789static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
790{
791 int dpms = DRM_MODE_DPMS_OFF;
792 struct drm_connector *connector;
793 struct drm_device *dev = crtc->dev;
794
795 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
796 if (connector->encoder && connector->encoder->crtc == crtc)
797 if (connector->dpms < dpms)
798 dpms = connector->dpms;
799 return dpms;
800}
801
802/**
803 * drm_helper_connector_dpms
804 * @connector affected connector
805 * @mode DPMS mode
806 *
807 * Calls the low-level connector DPMS function, then
808 * calls appropriate encoder and crtc DPMS functions as well
809 */
810void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
811{
812 struct drm_encoder *encoder = connector->encoder;
813 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
814 int old_dpms;
815
816 if (mode == connector->dpms)
817 return;
818
819 old_dpms = connector->dpms;
820 connector->dpms = mode;
821
822 /* from off to on, do crtc then encoder */
823 if (mode < old_dpms) {
824 if (crtc) {
825 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
826 if (crtc_funcs->dpms)
827 (*crtc_funcs->dpms) (crtc,
828 drm_helper_choose_crtc_dpms(crtc));
829 }
830 if (encoder) {
831 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
832 if (encoder_funcs->dpms)
833 (*encoder_funcs->dpms) (encoder,
834 drm_helper_choose_encoder_dpms(encoder));
835 }
836 }
837
838 /* from on to off, do encoder then crtc */
839 if (mode > old_dpms) {
840 if (encoder) {
841 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
842 if (encoder_funcs->dpms)
843 (*encoder_funcs->dpms) (encoder,
844 drm_helper_choose_encoder_dpms(encoder));
845 }
846 if (crtc) {
847 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
848 if (crtc_funcs->dpms)
849 (*crtc_funcs->dpms) (crtc,
850 drm_helper_choose_crtc_dpms(crtc));
851 }
852 }
853
854 return;
855}
856EXPORT_SYMBOL(drm_helper_connector_dpms);
857
858int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
859 struct drm_mode_fb_cmd2 *mode_cmd)
860{
861 int i;
862
863 fb->width = mode_cmd->width;
864 fb->height = mode_cmd->height;
865 for (i = 0; i < 4; i++) {
866 fb->pitches[i] = mode_cmd->pitches[i];
867 fb->offsets[i] = mode_cmd->offsets[i];
868 }
869 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth,
870 &fb->bits_per_pixel);
871 fb->pixel_format = mode_cmd->pixel_format;
872
873 return 0;
874}
875EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
876
877int drm_helper_resume_force_mode(struct drm_device *dev)
878{
879 struct drm_crtc *crtc;
880 struct drm_encoder *encoder;
881 struct drm_encoder_helper_funcs *encoder_funcs;
882 struct drm_crtc_helper_funcs *crtc_funcs;
883 int ret;
884
885 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
886
887 if (!crtc->enabled)
888 continue;
889
890 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
891 crtc->x, crtc->y, crtc->fb);
892
893 if (ret == false)
894 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
895
896 /* Turn off outputs that were already powered off */
897 if (drm_helper_choose_crtc_dpms(crtc)) {
898 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
899
900 if(encoder->crtc != crtc)
901 continue;
902
903 encoder_funcs = encoder->helper_private;
904 if (encoder_funcs->dpms)
905 (*encoder_funcs->dpms) (encoder,
906 drm_helper_choose_encoder_dpms(encoder));
907 }
908
909 crtc_funcs = crtc->helper_private;
910 if (crtc_funcs->dpms)
911 (*crtc_funcs->dpms) (crtc,
912 drm_helper_choose_crtc_dpms(crtc));
913 }
914 }
915 /* disable the unused connectors while restoring the modesetting */
916 drm_helper_disable_unused_functions(dev);
917 return 0;
918}
919EXPORT_SYMBOL(drm_helper_resume_force_mode);
920
921#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
922static void output_poll_execute(struct work_struct *work)
923{
924 struct delayed_work *delayed_work = to_delayed_work(work);
925 struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
926 struct drm_connector *connector;
927 enum drm_connector_status old_status;
928 bool repoll = false, changed = false;
929
930 if (!drm_kms_helper_poll)
931 return;
932
933 mutex_lock(&dev->mode_config.mutex);
934 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
935
936 /* if this is HPD or polled don't check it -
937 TV out for instance */
938 if (!connector->polled)
939 continue;
940
941 else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT))
942 repoll = true;
943
944 old_status = connector->status;
945 /* if we are connected and don't want to poll for disconnect
946 skip it */
947 if (old_status == connector_status_connected &&
948 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) &&
949 !(connector->polled & DRM_CONNECTOR_POLL_HPD))
950 continue;
951
952 connector->status = connector->funcs->detect(connector, false);
953 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
954 connector->base.id,
955 drm_get_connector_name(connector),
956 old_status, connector->status);
957 if (old_status != connector->status)
958 changed = true;
959 }
960
961 mutex_unlock(&dev->mode_config.mutex);
962
963 if (changed) {
964 /* send a uevent + call fbdev */
965 drm_sysfs_hotplug_event(dev);
966 if (dev->mode_config.funcs->output_poll_changed)
967 dev->mode_config.funcs->output_poll_changed(dev);
968 }
969
970 if (repoll)
971 queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
972}
973
974void drm_kms_helper_poll_disable(struct drm_device *dev)
975{
976 if (!dev->mode_config.poll_enabled)
977 return;
978 cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
979}
980EXPORT_SYMBOL(drm_kms_helper_poll_disable);
981
982void drm_kms_helper_poll_enable(struct drm_device *dev)
983{
984 bool poll = false;
985 struct drm_connector *connector;
986
987 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
988 return;
989
990 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
991 if (connector->polled)
992 poll = true;
993 }
994
995 if (poll)
996 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
997}
998EXPORT_SYMBOL(drm_kms_helper_poll_enable);
999
1000void drm_kms_helper_poll_init(struct drm_device *dev)
1001{
1002 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
1003 dev->mode_config.poll_enabled = true;
1004
1005 drm_kms_helper_poll_enable(dev);
1006}
1007EXPORT_SYMBOL(drm_kms_helper_poll_init);
1008
1009void drm_kms_helper_poll_fini(struct drm_device *dev)
1010{
1011 drm_kms_helper_poll_disable(dev);
1012}
1013EXPORT_SYMBOL(drm_kms_helper_poll_fini);
1014
1015void drm_helper_hpd_irq_event(struct drm_device *dev)
1016{
1017 if (!dev->mode_config.poll_enabled)
1018 return;
1019
1020 /* kill timer and schedule immediate execution, this doesn't block */
1021 cancel_delayed_work(&dev->mode_config.output_poll_work);
1022 if (drm_kms_helper_poll)
1023 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
1024}
1025EXPORT_SYMBOL(drm_helper_hpd_irq_event);