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"
35 #include "drm_fb_helper.h"
37 static bool drm_kms_helper_poll = true;
38 module_param_named(poll, drm_kms_helper_poll, bool, 0600);
40 static void drm_mode_validate_flag(struct drm_connector *connector,
43 struct drm_display_mode *mode, *t;
45 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
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;
61 * drm_helper_probe_single_connector_modes - get complete set of display modes
63 * @maxX: max width for modes
64 * @maxY: max height for modes
67 * Caller must hold mode config lock.
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.
74 * Intended to be used either at bootup time or when major configuration
75 * changes have occurred.
77 * FIXME: take into account monitor limits
80 * Number of modes found on @connector.
82 int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
83 uint32_t maxX, uint32_t maxY)
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;
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;
98 if (connector->force) {
99 if (connector->force == DRM_FORCE_ON)
100 connector->status = connector_status_connected;
102 connector->status = connector_status_disconnected;
103 if (connector->funcs->force)
104 connector->funcs->force(connector);
106 connector->status = connector->funcs->detect(connector, true);
107 drm_kms_helper_poll_enable(dev);
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);
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);
123 drm_mode_connector_list_update(connector);
126 drm_mode_validate_size(dev, &connector->modes, maxX,
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);
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,
142 drm_mode_prune_invalid(dev, &connector->modes, true);
144 if (list_empty(&connector->modes))
147 drm_mode_sort(&connector->modes);
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);
154 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
155 drm_mode_debug_printmodeline(mode);
160 EXPORT_SYMBOL(drm_helper_probe_single_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_encoder_disable(struct drm_encoder *encoder)
212 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
214 if (encoder_funcs->disable)
215 (*encoder_funcs->disable)(encoder);
217 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
221 * drm_helper_disable_unused_functions - disable unused objects
225 * Caller must hold mode config lock.
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.
230 void drm_helper_disable_unused_functions(struct drm_device *dev)
232 struct drm_encoder *encoder;
233 struct drm_connector *connector;
234 struct drm_crtc *crtc;
236 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
237 if (!connector->encoder)
239 if (connector->status == connector_status_disconnected)
240 connector->encoder = NULL;
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;
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);
258 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
263 EXPORT_SYMBOL(drm_helper_disable_unused_functions);
266 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
267 * @encoder: encoder to test
268 * @crtc: crtc to test
270 * Return false if @encoder can't be driven by @crtc, true otherwise.
272 static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
273 struct drm_crtc *crtc)
275 struct drm_device *dev;
276 struct drm_crtc *tmp;
279 WARN(!crtc, "checking null crtc?\n");
283 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
289 if (encoder->possible_crtcs & crtc_mask)
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.
300 drm_crtc_prepare_encoders(struct drm_device *dev)
302 struct drm_encoder_helper_funcs *encoder_funcs;
303 struct drm_encoder *encoder;
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);
318 * drm_crtc_set_mode - set a mode
319 * @crtc: CRTC to program
325 * Caller must hold mode config lock.
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.
331 * True if the mode was set successfully, or false otherwise.
333 bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
334 struct drm_display_mode *mode,
336 struct drm_framebuffer *old_fb)
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;
346 crtc->enabled = drm_helper_crtc_in_use(crtc);
350 adjusted_mode = drm_mode_duplicate(dev, mode);
352 saved_hwmode = crtc->hwmode;
353 saved_mode = crtc->mode;
357 /* Update crtc values up front so the driver can rely on them for mode
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.
368 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
370 if (encoder->crtc != crtc)
372 encoder_funcs = encoder->helper_private;
373 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
375 DRM_DEBUG_KMS("Encoder fixup failed\n");
380 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
381 DRM_DEBUG_KMS("CRTC fixup failed\n");
384 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
386 /* Prepare the encoders and CRTCs before setting the mode. */
387 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
389 if (encoder->crtc != crtc)
391 encoder_funcs = encoder->helper_private;
392 /* Disable the encoders as the first thing we do. */
393 encoder_funcs->prepare(encoder);
396 drm_crtc_prepare_encoders(dev);
398 crtc_funcs->prepare(crtc);
400 /* Set up the DPLL and any encoders state that needs to adjust or depend
403 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
407 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
409 if (encoder->crtc != crtc)
412 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
413 encoder->base.id, drm_get_encoder_name(encoder),
414 mode->base.id, mode->name);
415 encoder_funcs = encoder->helper_private;
416 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
419 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
420 crtc_funcs->commit(crtc);
422 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
424 if (encoder->crtc != crtc)
427 encoder_funcs = encoder->helper_private;
428 encoder_funcs->commit(encoder);
432 /* Store real post-adjustment hardware mode. */
433 crtc->hwmode = *adjusted_mode;
435 /* Calculate and store various constants which
436 * are later needed by vblank and swap-completion
437 * timestamping. They are derived from true hwmode.
439 drm_calc_timestamping_constants(crtc);
441 /* FIXME: add subpixel order */
443 drm_mode_destroy(dev, adjusted_mode);
445 crtc->hwmode = saved_hwmode;
446 crtc->mode = saved_mode;
453 EXPORT_SYMBOL(drm_crtc_helper_set_mode);
457 * drm_crtc_helper_set_config - set a new config from userspace
458 * @crtc: CRTC to setup
459 * @crtc_info: user provided configuration
460 * @new_mode: new mode to set
461 * @connector_set: set of connectors for the new config
462 * @fb: new framebuffer
465 * Caller must hold mode config lock.
467 * Setup a new configuration, provided by the user in @crtc_info, and enable
473 int drm_crtc_helper_set_config(struct drm_mode_set *set)
475 struct drm_device *dev;
476 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
477 struct drm_encoder *save_encoders, *new_encoder, *encoder;
478 struct drm_framebuffer *old_fb = NULL;
479 bool mode_changed = false; /* if true do a full mode set */
480 bool fb_changed = false; /* if true and !mode_changed just do a flip */
481 struct drm_connector *save_connectors, *connector;
482 int count = 0, ro, fail = 0;
483 struct drm_crtc_helper_funcs *crtc_funcs;
495 if (!set->crtc->helper_private)
498 crtc_funcs = set->crtc->helper_private;
504 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
505 set->crtc->base.id, set->fb->base.id,
506 (int)set->num_connectors, set->x, set->y);
508 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
510 set->num_connectors = 0;
513 dev = set->crtc->dev;
515 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
517 save_crtcs = kzalloc(dev->mode_config.num_crtc *
518 sizeof(struct drm_crtc), GFP_KERNEL);
522 save_encoders = kzalloc(dev->mode_config.num_encoder *
523 sizeof(struct drm_encoder), GFP_KERNEL);
524 if (!save_encoders) {
529 save_connectors = kzalloc(dev->mode_config.num_connector *
530 sizeof(struct drm_connector), GFP_KERNEL);
531 if (!save_connectors) {
533 kfree(save_encoders);
537 /* Copy data. Note that driver private data is not affected.
538 * Should anything bad happen only the expected state is
539 * restored, not the drivers personal bookkeeping.
542 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
543 save_crtcs[count++] = *crtc;
547 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
548 save_encoders[count++] = *encoder;
552 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
553 save_connectors[count++] = *connector;
556 /* We should be able to check here if the fb has the same properties
557 * and then just flip_or_move it */
558 if (set->crtc->fb != set->fb) {
559 /* If we have no fb then treat it as a full mode set */
560 if (set->crtc->fb == NULL) {
561 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
563 } else if (set->fb == NULL) {
565 } else if (set->fb->depth != set->crtc->fb->depth) {
567 } else if (set->fb->bits_per_pixel !=
568 set->crtc->fb->bits_per_pixel) {
574 if (set->x != set->crtc->x || set->y != set->crtc->y)
577 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
578 DRM_DEBUG_KMS("modes are different, full mode set\n");
579 drm_mode_debug_printmodeline(&set->crtc->mode);
580 drm_mode_debug_printmodeline(set->mode);
584 /* a) traverse passed in connector list and get encoders for them */
586 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
587 struct drm_connector_helper_funcs *connector_funcs =
588 connector->helper_private;
589 new_encoder = connector->encoder;
590 for (ro = 0; ro < set->num_connectors; ro++) {
591 if (set->connectors[ro] == connector) {
592 new_encoder = connector_funcs->best_encoder(connector);
593 /* if we can't get an encoder for a connector
594 we are setting now - then fail */
595 if (new_encoder == NULL)
596 /* don't break so fail path works correct */
602 if (new_encoder != connector->encoder) {
603 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
605 /* If the encoder is reused for another connector, then
606 * the appropriate crtc will be set later.
608 if (connector->encoder)
609 connector->encoder->crtc = NULL;
610 connector->encoder = new_encoder;
620 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
621 if (!connector->encoder)
624 if (connector->encoder->crtc == set->crtc)
627 new_crtc = connector->encoder->crtc;
629 for (ro = 0; ro < set->num_connectors; ro++) {
630 if (set->connectors[ro] == connector)
631 new_crtc = set->crtc;
634 /* Make sure the new CRTC will work with the encoder */
636 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
640 if (new_crtc != connector->encoder->crtc) {
641 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
643 connector->encoder->crtc = new_crtc;
646 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
647 connector->base.id, drm_get_connector_name(connector),
650 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
651 connector->base.id, drm_get_connector_name(connector));
655 /* mode_set_base is not a required function */
656 if (fb_changed && !crtc_funcs->mode_set_base)
660 set->crtc->enabled = drm_helper_crtc_in_use(set->crtc);
661 if (set->crtc->enabled) {
662 DRM_DEBUG_KMS("attempting to set mode from"
664 drm_mode_debug_printmodeline(set->mode);
665 old_fb = set->crtc->fb;
666 set->crtc->fb = set->fb;
667 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
670 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
672 set->crtc->fb = old_fb;
676 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
677 for (i = 0; i < set->num_connectors; i++) {
678 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
679 drm_get_connector_name(set->connectors[i]));
680 set->connectors[i]->dpms = DRM_MODE_DPMS_ON;
683 drm_helper_disable_unused_functions(dev);
684 } else if (fb_changed) {
685 set->crtc->x = set->x;
686 set->crtc->y = set->y;
688 old_fb = set->crtc->fb;
689 if (set->crtc->fb != set->fb)
690 set->crtc->fb = set->fb;
691 ret = crtc_funcs->mode_set_base(set->crtc,
692 set->x, set->y, old_fb);
694 set->crtc->fb = old_fb;
699 kfree(save_connectors);
700 kfree(save_encoders);
705 /* Restore all previous data. */
707 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
708 *crtc = save_crtcs[count++];
712 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
713 *encoder = save_encoders[count++];
717 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
718 *connector = save_connectors[count++];
721 kfree(save_connectors);
722 kfree(save_encoders);
726 EXPORT_SYMBOL(drm_crtc_helper_set_config);
728 static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
730 int dpms = DRM_MODE_DPMS_OFF;
731 struct drm_connector *connector;
732 struct drm_device *dev = encoder->dev;
734 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
735 if (connector->encoder == encoder)
736 if (connector->dpms < dpms)
737 dpms = connector->dpms;
741 static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
743 int dpms = DRM_MODE_DPMS_OFF;
744 struct drm_connector *connector;
745 struct drm_device *dev = crtc->dev;
747 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
748 if (connector->encoder && connector->encoder->crtc == crtc)
749 if (connector->dpms < dpms)
750 dpms = connector->dpms;
755 * drm_helper_connector_dpms
756 * @connector affected connector
759 * Calls the low-level connector DPMS function, then
760 * calls appropriate encoder and crtc DPMS functions as well
762 void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
764 struct drm_encoder *encoder = connector->encoder;
765 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
768 if (mode == connector->dpms)
771 old_dpms = connector->dpms;
772 connector->dpms = mode;
774 /* from off to on, do crtc then encoder */
775 if (mode < old_dpms) {
777 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
778 if (crtc_funcs->dpms)
779 (*crtc_funcs->dpms) (crtc,
780 drm_helper_choose_crtc_dpms(crtc));
783 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
784 if (encoder_funcs->dpms)
785 (*encoder_funcs->dpms) (encoder,
786 drm_helper_choose_encoder_dpms(encoder));
790 /* from on to off, do encoder then crtc */
791 if (mode > old_dpms) {
793 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
794 if (encoder_funcs->dpms)
795 (*encoder_funcs->dpms) (encoder,
796 drm_helper_choose_encoder_dpms(encoder));
799 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
800 if (crtc_funcs->dpms)
801 (*crtc_funcs->dpms) (crtc,
802 drm_helper_choose_crtc_dpms(crtc));
808 EXPORT_SYMBOL(drm_helper_connector_dpms);
810 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
811 struct drm_mode_fb_cmd *mode_cmd)
813 fb->width = mode_cmd->width;
814 fb->height = mode_cmd->height;
815 fb->pitch = mode_cmd->pitch;
816 fb->bits_per_pixel = mode_cmd->bpp;
817 fb->depth = mode_cmd->depth;
821 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
823 int drm_helper_resume_force_mode(struct drm_device *dev)
825 struct drm_crtc *crtc;
826 struct drm_encoder *encoder;
827 struct drm_encoder_helper_funcs *encoder_funcs;
828 struct drm_crtc_helper_funcs *crtc_funcs;
831 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
836 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
837 crtc->x, crtc->y, crtc->fb);
840 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
842 /* Turn off outputs that were already powered off */
843 if (drm_helper_choose_crtc_dpms(crtc)) {
844 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
846 if(encoder->crtc != crtc)
849 encoder_funcs = encoder->helper_private;
850 if (encoder_funcs->dpms)
851 (*encoder_funcs->dpms) (encoder,
852 drm_helper_choose_encoder_dpms(encoder));
855 crtc_funcs = crtc->helper_private;
856 if (crtc_funcs->dpms)
857 (*crtc_funcs->dpms) (crtc,
858 drm_helper_choose_crtc_dpms(crtc));
861 /* disable the unused connectors while restoring the modesetting */
862 drm_helper_disable_unused_functions(dev);
865 EXPORT_SYMBOL(drm_helper_resume_force_mode);
867 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
868 static void output_poll_execute(struct work_struct *work)
870 struct delayed_work *delayed_work = to_delayed_work(work);
871 struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
872 struct drm_connector *connector;
873 enum drm_connector_status old_status;
874 bool repoll = false, changed = false;
876 if (!drm_kms_helper_poll)
879 mutex_lock(&dev->mode_config.mutex);
880 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
882 /* if this is HPD or polled don't check it -
883 TV out for instance */
884 if (!connector->polled)
887 else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT))
890 old_status = connector->status;
891 /* if we are connected and don't want to poll for disconnect
893 if (old_status == connector_status_connected &&
894 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) &&
895 !(connector->polled & DRM_CONNECTOR_POLL_HPD))
898 connector->status = connector->funcs->detect(connector, false);
899 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
901 drm_get_connector_name(connector),
902 old_status, connector->status);
903 if (old_status != connector->status)
907 mutex_unlock(&dev->mode_config.mutex);
910 /* send a uevent + call fbdev */
911 drm_sysfs_hotplug_event(dev);
912 if (dev->mode_config.funcs->output_poll_changed)
913 dev->mode_config.funcs->output_poll_changed(dev);
917 queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
920 void drm_kms_helper_poll_disable(struct drm_device *dev)
922 if (!dev->mode_config.poll_enabled)
924 cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
926 EXPORT_SYMBOL(drm_kms_helper_poll_disable);
928 void drm_kms_helper_poll_enable(struct drm_device *dev)
931 struct drm_connector *connector;
933 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
936 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
937 if (connector->polled)
942 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
944 EXPORT_SYMBOL(drm_kms_helper_poll_enable);
946 void drm_kms_helper_poll_init(struct drm_device *dev)
948 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
949 dev->mode_config.poll_enabled = true;
951 drm_kms_helper_poll_enable(dev);
953 EXPORT_SYMBOL(drm_kms_helper_poll_init);
955 void drm_kms_helper_poll_fini(struct drm_device *dev)
957 drm_kms_helper_poll_disable(dev);
959 EXPORT_SYMBOL(drm_kms_helper_poll_fini);
961 void drm_helper_hpd_irq_event(struct drm_device *dev)
963 if (!dev->mode_config.poll_enabled)
966 /* kill timer and schedule immediate execution, this doesn't block */
967 cancel_delayed_work(&dev->mode_config.output_poll_work);
968 if (drm_kms_helper_poll)
969 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
971 EXPORT_SYMBOL(drm_helper_hpd_irq_event);