2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
5 * DRM core CRTC related functions
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.
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
27 * Eric Anholt <eric@anholt.net>
28 * Dave Airlie <airlied@linux.ie>
29 * Jesse Barnes <jesse.barnes@intel.com>
34 #include "drm_crtc_helper.h"
36 static void drm_mode_validate_flag(struct drm_connector *connector,
39 struct drm_display_mode *mode, *t;
41 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
44 list_for_each_entry_safe(mode, t, &connector->modes, head) {
45 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
46 !(flags & DRM_MODE_FLAG_INTERLACE))
47 mode->status = MODE_NO_INTERLACE;
48 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
49 !(flags & DRM_MODE_FLAG_DBLSCAN))
50 mode->status = MODE_NO_DBLESCAN;
57 * drm_helper_probe_connector_modes - get complete set of display modes
59 * @maxX: max width for modes
60 * @maxY: max height for modes
63 * Caller must hold mode config lock.
65 * Based on @dev's mode_config layout, scan all the connectors and try to detect
66 * modes on them. Modes will first be added to the connector's probed_modes
67 * list, then culled (based on validity and the @maxX, @maxY parameters) and
68 * put into the normal modes list.
70 * Intended to be used either at bootup time or when major configuration
71 * changes have occurred.
73 * FIXME: take into account monitor limits
76 * Number of modes found on @connector.
78 int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
79 uint32_t maxX, uint32_t maxY)
81 struct drm_device *dev = connector->dev;
82 struct drm_display_mode *mode, *t;
83 struct drm_connector_helper_funcs *connector_funcs =
84 connector->helper_private;
88 DRM_DEBUG_KMS("%s\n", drm_get_connector_name(connector));
89 /* set all modes to the unverified state */
90 list_for_each_entry_safe(mode, t, &connector->modes, head)
91 mode->status = MODE_UNVERIFIED;
93 connector->status = connector->funcs->detect(connector);
95 if (connector->status == connector_status_disconnected) {
96 DRM_DEBUG_KMS("%s is disconnected\n",
97 drm_get_connector_name(connector));
101 count = (*connector_funcs->get_modes)(connector);
103 count = drm_add_modes_noedid(connector, 800, 600);
108 drm_mode_connector_list_update(connector);
111 drm_mode_validate_size(dev, &connector->modes, maxX,
114 if (connector->interlace_allowed)
115 mode_flags |= DRM_MODE_FLAG_INTERLACE;
116 if (connector->doublescan_allowed)
117 mode_flags |= DRM_MODE_FLAG_DBLSCAN;
118 drm_mode_validate_flag(connector, mode_flags);
120 list_for_each_entry_safe(mode, t, &connector->modes, head) {
121 if (mode->status == MODE_OK)
122 mode->status = connector_funcs->mode_valid(connector,
127 drm_mode_prune_invalid(dev, &connector->modes, true);
129 if (list_empty(&connector->modes))
132 drm_mode_sort(&connector->modes);
134 DRM_DEBUG_KMS("Probed modes for %s\n",
135 drm_get_connector_name(connector));
136 list_for_each_entry_safe(mode, t, &connector->modes, head) {
137 mode->vrefresh = drm_mode_vrefresh(mode);
139 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
140 drm_mode_debug_printmodeline(mode);
145 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
147 int drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX,
150 struct drm_connector *connector;
153 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
154 count += drm_helper_probe_single_connector_modes(connector,
160 EXPORT_SYMBOL(drm_helper_probe_connector_modes);
163 * drm_helper_encoder_in_use - check if a given encoder is in use
164 * @encoder: encoder to check
167 * Caller must hold mode config lock.
169 * Walk @encoders's DRM device's mode_config and see if it's in use.
172 * True if @encoder is part of the mode_config, false otherwise.
174 bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
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)
183 EXPORT_SYMBOL(drm_helper_encoder_in_use);
186 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
187 * @crtc: CRTC to check
190 * Caller must hold mode config lock.
192 * Walk @crtc's DRM device's mode_config and see if it's in use.
195 * True if @crtc is part of the mode_config, false otherwise.
197 bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
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))
207 EXPORT_SYMBOL(drm_helper_crtc_in_use);
210 * drm_disable_unused_functions - disable unused objects
214 * Caller must hold mode config lock.
216 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
217 * by calling its dpms function, which should power it off.
219 void drm_helper_disable_unused_functions(struct drm_device *dev)
221 struct drm_encoder *encoder;
222 struct drm_connector *connector;
223 struct drm_encoder_helper_funcs *encoder_funcs;
224 struct drm_crtc *crtc;
226 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
227 if (!connector->encoder)
229 if (connector->status == connector_status_disconnected)
230 connector->encoder = NULL;
233 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
234 encoder_funcs = encoder->helper_private;
235 if (!drm_helper_encoder_in_use(encoder)) {
236 if (encoder_funcs->disable)
237 (*encoder_funcs->disable)(encoder);
239 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
240 /* disconnector encoder from any connector */
241 encoder->crtc = NULL;
245 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
246 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
247 crtc->enabled = drm_helper_crtc_in_use(crtc);
248 if (!crtc->enabled) {
249 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
254 EXPORT_SYMBOL(drm_helper_disable_unused_functions);
256 static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *connector, int width, int height)
258 struct drm_display_mode *mode;
260 list_for_each_entry(mode, &connector->modes, head) {
261 if (drm_mode_width(mode) > width ||
262 drm_mode_height(mode) > height)
264 if (mode->type & DRM_MODE_TYPE_PREFERRED)
270 static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
275 enable = connector->status == connector_status_connected;
277 enable = connector->status != connector_status_disconnected;
282 static void drm_enable_connectors(struct drm_device *dev, bool *enabled)
284 bool any_enabled = false;
285 struct drm_connector *connector;
288 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
289 enabled[i] = drm_connector_enabled(connector, true);
290 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
291 enabled[i] ? "yes" : "no");
292 any_enabled |= enabled[i];
300 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
301 enabled[i] = drm_connector_enabled(connector, false);
306 static bool drm_target_preferred(struct drm_device *dev,
307 struct drm_display_mode **modes,
308 bool *enabled, int width, int height)
310 struct drm_connector *connector;
313 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
315 if (enabled[i] == false) {
320 DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
323 modes[i] = drm_has_preferred_mode(connector, width, height);
324 /* No preferred modes, pick one off the list */
325 if (!modes[i] && !list_empty(&connector->modes)) {
326 list_for_each_entry(modes[i], &connector->modes, head)
329 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
336 static int drm_pick_crtcs(struct drm_device *dev,
337 struct drm_crtc **best_crtcs,
338 struct drm_display_mode **modes,
339 int n, int width, int height)
342 struct drm_connector *connector;
343 struct drm_connector_helper_funcs *connector_funcs;
344 struct drm_encoder *encoder;
345 struct drm_crtc *best_crtc;
346 int my_score, best_score, score;
347 struct drm_crtc **crtcs, *crtc;
349 if (n == dev->mode_config.num_connector)
352 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
358 best_crtcs[n] = NULL;
360 best_score = drm_pick_crtcs(dev, best_crtcs, modes, n+1, width, height);
361 if (modes[n] == NULL)
364 crtcs = kmalloc(dev->mode_config.num_connector *
365 sizeof(struct drm_crtc *), GFP_KERNEL);
370 if (connector->status == connector_status_connected)
372 if (drm_has_preferred_mode(connector, width, height))
375 connector_funcs = connector->helper_private;
376 encoder = connector_funcs->best_encoder(connector);
380 connector->encoder = encoder;
382 /* select a crtc for this connector and then attempt to configure
383 remaining connectors */
385 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
387 if ((encoder->possible_crtcs & (1 << c)) == 0) {
392 for (o = 0; o < n; o++)
393 if (best_crtcs[o] == crtc)
397 /* ignore cloning for now */
403 memcpy(crtcs, best_crtcs, n * sizeof(struct drm_crtc *));
404 score = my_score + drm_pick_crtcs(dev, crtcs, modes, n + 1,
406 if (score > best_score) {
409 memcpy(best_crtcs, crtcs,
410 dev->mode_config.num_connector *
411 sizeof(struct drm_crtc *));
420 static void drm_setup_crtcs(struct drm_device *dev)
422 struct drm_crtc **crtcs;
423 struct drm_display_mode **modes;
424 struct drm_encoder *encoder;
425 struct drm_connector *connector;
432 width = dev->mode_config.max_width;
433 height = dev->mode_config.max_height;
435 /* clean out all the encoder/crtc combos */
436 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
437 encoder->crtc = NULL;
440 crtcs = kcalloc(dev->mode_config.num_connector,
441 sizeof(struct drm_crtc *), GFP_KERNEL);
442 modes = kcalloc(dev->mode_config.num_connector,
443 sizeof(struct drm_display_mode *), GFP_KERNEL);
444 enabled = kcalloc(dev->mode_config.num_connector,
445 sizeof(bool), GFP_KERNEL);
447 drm_enable_connectors(dev, enabled);
449 ret = drm_target_preferred(dev, modes, enabled, width, height);
451 DRM_ERROR("Unable to find initial modes\n");
453 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
455 drm_pick_crtcs(dev, crtcs, modes, 0, width, height);
458 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
459 struct drm_display_mode *mode = modes[i];
460 struct drm_crtc *crtc = crtcs[i];
462 if (connector->encoder == NULL) {
468 DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
469 mode->name, crtc->base.id);
470 crtc->desired_mode = mode;
471 connector->encoder->crtc = crtc;
473 connector->encoder->crtc = NULL;
474 connector->encoder = NULL;
485 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
486 * @encoder: encoder to test
487 * @crtc: crtc to test
489 * Return false if @encoder can't be driven by @crtc, true otherwise.
491 static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
492 struct drm_crtc *crtc)
494 struct drm_device *dev;
495 struct drm_crtc *tmp;
498 WARN(!crtc, "checking null crtc?");
502 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
508 if (encoder->possible_crtcs & crtc_mask)
514 * Check the CRTC we're going to map each output to vs. its current
515 * CRTC. If they don't match, we have to disable the output and the CRTC
516 * since the driver will have to re-route things.
519 drm_crtc_prepare_encoders(struct drm_device *dev)
521 struct drm_encoder_helper_funcs *encoder_funcs;
522 struct drm_encoder *encoder;
524 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
525 encoder_funcs = encoder->helper_private;
526 /* Disable unused encoders */
527 if (encoder->crtc == NULL)
528 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
529 /* Disable encoders whose CRTC is about to change */
530 if (encoder_funcs->get_crtc &&
531 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
532 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
537 * drm_crtc_set_mode - set a mode
538 * @crtc: CRTC to program
544 * Caller must hold mode config lock.
546 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
547 * to fixup or reject the mode prior to trying to set it.
550 * True if the mode was set successfully, or false otherwise.
552 bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
553 struct drm_display_mode *mode,
555 struct drm_framebuffer *old_fb)
557 struct drm_device *dev = crtc->dev;
558 struct drm_display_mode *adjusted_mode, saved_mode;
559 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
560 struct drm_encoder_helper_funcs *encoder_funcs;
561 int saved_x, saved_y;
562 struct drm_encoder *encoder;
565 adjusted_mode = drm_mode_duplicate(dev, mode);
567 crtc->enabled = drm_helper_crtc_in_use(crtc);
572 saved_mode = crtc->mode;
576 /* Update crtc values up front so the driver can rely on them for mode
583 /* Pass our mode to the connectors and the CRTC to give them a chance to
584 * adjust it according to limitations or connector properties, and also
585 * a chance to reject the mode entirely.
587 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
589 if (encoder->crtc != crtc)
591 encoder_funcs = encoder->helper_private;
592 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
598 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
602 /* Prepare the encoders and CRTCs before setting the mode. */
603 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
605 if (encoder->crtc != crtc)
607 encoder_funcs = encoder->helper_private;
608 /* Disable the encoders as the first thing we do. */
609 encoder_funcs->prepare(encoder);
612 drm_crtc_prepare_encoders(dev);
614 crtc_funcs->prepare(crtc);
616 /* Set up the DPLL and any encoders state that needs to adjust or depend
619 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
623 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
625 if (encoder->crtc != crtc)
628 DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder),
629 mode->name, mode->base.id);
630 encoder_funcs = encoder->helper_private;
631 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
634 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
635 crtc_funcs->commit(crtc);
637 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
639 if (encoder->crtc != crtc)
642 encoder_funcs = encoder->helper_private;
643 encoder_funcs->commit(encoder);
647 /* XXX free adjustedmode */
648 drm_mode_destroy(dev, adjusted_mode);
649 /* FIXME: add subpixel order */
652 crtc->mode = saved_mode;
659 EXPORT_SYMBOL(drm_crtc_helper_set_mode);
663 * drm_crtc_helper_set_config - set a new config from userspace
664 * @crtc: CRTC to setup
665 * @crtc_info: user provided configuration
666 * @new_mode: new mode to set
667 * @connector_set: set of connectors for the new config
668 * @fb: new framebuffer
671 * Caller must hold mode config lock.
673 * Setup a new configuration, provided by the user in @crtc_info, and enable
679 int drm_crtc_helper_set_config(struct drm_mode_set *set)
681 struct drm_device *dev;
682 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
683 struct drm_encoder *save_encoders, *new_encoder, *encoder;
684 struct drm_framebuffer *old_fb = NULL;
685 bool mode_changed = false; /* if true do a full mode set */
686 bool fb_changed = false; /* if true and !mode_changed just do a flip */
687 struct drm_connector *save_connectors, *connector;
688 int count = 0, ro, fail = 0;
689 struct drm_crtc_helper_funcs *crtc_funcs;
700 if (!set->crtc->helper_private)
703 crtc_funcs = set->crtc->helper_private;
705 DRM_DEBUG_KMS("crtc: %p %d fb: %p connectors: %p num_connectors:"
706 " %d (x, y) (%i, %i)\n",
707 set->crtc, set->crtc->base.id, set->fb, set->connectors,
708 (int)set->num_connectors, set->x, set->y);
710 dev = set->crtc->dev;
712 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
714 save_crtcs = kzalloc(dev->mode_config.num_crtc *
715 sizeof(struct drm_crtc), GFP_KERNEL);
719 save_encoders = kzalloc(dev->mode_config.num_encoder *
720 sizeof(struct drm_encoder), GFP_KERNEL);
721 if (!save_encoders) {
726 save_connectors = kzalloc(dev->mode_config.num_connector *
727 sizeof(struct drm_connector), GFP_KERNEL);
728 if (!save_connectors) {
730 kfree(save_encoders);
734 /* Copy data. Note that driver private data is not affected.
735 * Should anything bad happen only the expected state is
736 * restored, not the drivers personal bookkeeping.
739 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
740 save_crtcs[count++] = *crtc;
744 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
745 save_encoders[count++] = *encoder;
749 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
750 save_connectors[count++] = *connector;
753 /* We should be able to check here if the fb has the same properties
754 * and then just flip_or_move it */
755 if (set->crtc->fb != set->fb) {
756 /* If we have no fb then treat it as a full mode set */
757 if (set->crtc->fb == NULL) {
758 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
760 } else if (set->fb == NULL) {
762 } else if ((set->fb->bits_per_pixel !=
763 set->crtc->fb->bits_per_pixel) ||
764 set->fb->depth != set->crtc->fb->depth)
770 if (set->x != set->crtc->x || set->y != set->crtc->y)
773 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
774 DRM_DEBUG_KMS("modes are different, full mode set\n");
775 drm_mode_debug_printmodeline(&set->crtc->mode);
776 drm_mode_debug_printmodeline(set->mode);
780 /* a) traverse passed in connector list and get encoders for them */
782 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
783 struct drm_connector_helper_funcs *connector_funcs =
784 connector->helper_private;
785 new_encoder = connector->encoder;
786 for (ro = 0; ro < set->num_connectors; ro++) {
787 if (set->connectors[ro] == connector) {
788 new_encoder = connector_funcs->best_encoder(connector);
789 /* if we can't get an encoder for a connector
790 we are setting now - then fail */
791 if (new_encoder == NULL)
792 /* don't break so fail path works correct */
798 if (new_encoder != connector->encoder) {
799 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
801 /* If the encoder is reused for another connector, then
802 * the appropriate crtc will be set later.
804 if (connector->encoder)
805 connector->encoder->crtc = NULL;
806 connector->encoder = new_encoder;
816 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
817 if (!connector->encoder)
820 if (connector->encoder->crtc == set->crtc)
823 new_crtc = connector->encoder->crtc;
825 for (ro = 0; ro < set->num_connectors; ro++) {
826 if (set->connectors[ro] == connector)
827 new_crtc = set->crtc;
830 /* Make sure the new CRTC will work with the encoder */
832 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
836 if (new_crtc != connector->encoder->crtc) {
837 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
839 connector->encoder->crtc = new_crtc;
841 DRM_DEBUG_KMS("setting connector %d crtc to %p\n",
842 connector->base.id, new_crtc);
845 /* mode_set_base is not a required function */
846 if (fb_changed && !crtc_funcs->mode_set_base)
850 old_fb = set->crtc->fb;
851 set->crtc->fb = set->fb;
852 set->crtc->enabled = (set->mode != NULL);
853 if (set->mode != NULL) {
854 DRM_DEBUG_KMS("attempting to set mode from"
856 drm_mode_debug_printmodeline(set->mode);
857 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
860 DRM_ERROR("failed to set mode on crtc %p\n",
865 /* TODO are these needed? */
866 set->crtc->desired_x = set->x;
867 set->crtc->desired_y = set->y;
868 set->crtc->desired_mode = set->mode;
870 drm_helper_disable_unused_functions(dev);
871 } else if (fb_changed) {
872 set->crtc->x = set->x;
873 set->crtc->y = set->y;
875 old_fb = set->crtc->fb;
876 if (set->crtc->fb != set->fb)
877 set->crtc->fb = set->fb;
878 ret = crtc_funcs->mode_set_base(set->crtc,
879 set->x, set->y, old_fb);
884 kfree(save_connectors);
885 kfree(save_encoders);
890 /* Restore all previous data. */
892 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
893 *crtc = save_crtcs[count++];
897 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
898 *encoder = save_encoders[count++];
902 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
903 *connector = save_connectors[count++];
906 kfree(save_connectors);
907 kfree(save_encoders);
911 EXPORT_SYMBOL(drm_crtc_helper_set_config);
913 bool drm_helper_plugged_event(struct drm_device *dev)
917 drm_helper_probe_connector_modes(dev, dev->mode_config.max_width,
918 dev->mode_config.max_height);
920 drm_setup_crtcs(dev);
922 /* alert the driver fb layer */
923 dev->mode_config.funcs->fb_changed(dev);
925 /* FIXME: send hotplug event */
929 * drm_initial_config - setup a sane initial connector configuration
933 * Called at init time, must take mode config lock.
935 * Scan the CRTCs and connectors and try to put together an initial setup.
936 * At the moment, this is a cloned configuration across all heads with
937 * a new framebuffer object as the backing store.
940 * Zero if everything went ok, nonzero otherwise.
942 bool drm_helper_initial_config(struct drm_device *dev)
946 count = drm_helper_probe_connector_modes(dev,
947 dev->mode_config.max_width,
948 dev->mode_config.max_height);
951 * we shouldn't end up with no modes here.
953 WARN(!count, "Connected connector with 0 modes\n");
955 drm_setup_crtcs(dev);
957 /* alert the driver fb layer */
958 dev->mode_config.funcs->fb_changed(dev);
962 EXPORT_SYMBOL(drm_helper_initial_config);
964 static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
966 int dpms = DRM_MODE_DPMS_OFF;
967 struct drm_connector *connector;
968 struct drm_device *dev = encoder->dev;
970 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
971 if (connector->encoder == encoder)
972 if (connector->dpms < dpms)
973 dpms = connector->dpms;
977 static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
979 int dpms = DRM_MODE_DPMS_OFF;
980 struct drm_connector *connector;
981 struct drm_device *dev = crtc->dev;
983 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
984 if (connector->encoder && connector->encoder->crtc == crtc)
985 if (connector->dpms < dpms)
986 dpms = connector->dpms;
991 * drm_helper_connector_dpms
992 * @connector affected connector
995 * Calls the low-level connector DPMS function, then
996 * calls appropriate encoder and crtc DPMS functions as well
998 void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
1000 struct drm_encoder *encoder = connector->encoder;
1001 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
1004 if (mode == connector->dpms)
1007 old_dpms = connector->dpms;
1008 connector->dpms = mode;
1010 /* from off to on, do crtc then encoder */
1011 if (mode < old_dpms) {
1013 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
1014 if (crtc_funcs->dpms)
1015 (*crtc_funcs->dpms) (crtc,
1016 drm_helper_choose_crtc_dpms(crtc));
1019 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
1020 if (encoder_funcs->dpms)
1021 (*encoder_funcs->dpms) (encoder,
1022 drm_helper_choose_encoder_dpms(encoder));
1026 /* from on to off, do encoder then crtc */
1027 if (mode > old_dpms) {
1029 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
1030 if (encoder_funcs->dpms)
1031 (*encoder_funcs->dpms) (encoder,
1032 drm_helper_choose_encoder_dpms(encoder));
1035 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
1036 if (crtc_funcs->dpms)
1037 (*crtc_funcs->dpms) (crtc,
1038 drm_helper_choose_crtc_dpms(crtc));
1044 EXPORT_SYMBOL(drm_helper_connector_dpms);
1047 * drm_hotplug_stage_two
1049 * @connector hotpluged connector
1052 * Caller must hold mode config lock, function might grab struct lock.
1054 * Stage two of a hotplug.
1057 * Zero on success, errno on failure.
1059 int drm_helper_hotplug_stage_two(struct drm_device *dev)
1061 drm_helper_plugged_event(dev);
1065 EXPORT_SYMBOL(drm_helper_hotplug_stage_two);
1067 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
1068 struct drm_mode_fb_cmd *mode_cmd)
1070 fb->width = mode_cmd->width;
1071 fb->height = mode_cmd->height;
1072 fb->pitch = mode_cmd->pitch;
1073 fb->bits_per_pixel = mode_cmd->bpp;
1074 fb->depth = mode_cmd->depth;
1078 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
1080 int drm_helper_resume_force_mode(struct drm_device *dev)
1082 struct drm_crtc *crtc;
1085 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1090 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
1091 crtc->x, crtc->y, crtc->fb);
1094 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
1096 /* disable the unused connectors while restoring the modesetting */
1097 drm_helper_disable_unused_functions(dev);
1100 EXPORT_SYMBOL(drm_helper_resume_force_mode);