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>
32 #include <linux/export.h>
36 #include "drm_crtc_helper.h"
37 #include "drm_fb_helper.h"
39 static bool drm_kms_helper_poll = true;
40 module_param_named(poll, drm_kms_helper_poll, bool, 0600);
42 static void drm_mode_validate_flag(struct drm_connector *connector,
45 struct drm_display_mode *mode, *t;
47 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
50 list_for_each_entry_safe(mode, t, &connector->modes, head) {
51 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
52 !(flags & DRM_MODE_FLAG_INTERLACE))
53 mode->status = MODE_NO_INTERLACE;
54 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
55 !(flags & DRM_MODE_FLAG_DBLSCAN))
56 mode->status = MODE_NO_DBLESCAN;
63 * drm_helper_probe_single_connector_modes - get complete set of display modes
65 * @maxX: max width for modes
66 * @maxY: max height for modes
69 * Caller must hold mode config lock.
71 * Based on @dev's mode_config layout, scan all the connectors and try to detect
72 * modes on them. Modes will first be added to the connector's probed_modes
73 * list, then culled (based on validity and the @maxX, @maxY parameters) and
74 * put into the normal modes list.
76 * Intended to be used either at bootup time or when major configuration
77 * changes have occurred.
79 * FIXME: take into account monitor limits
82 * Number of modes found on @connector.
84 int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
85 uint32_t maxX, uint32_t maxY)
87 struct drm_device *dev = connector->dev;
88 struct drm_display_mode *mode, *t;
89 struct drm_connector_helper_funcs *connector_funcs =
90 connector->helper_private;
94 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
95 drm_get_connector_name(connector));
96 /* set all modes to the unverified state */
97 list_for_each_entry_safe(mode, t, &connector->modes, head)
98 mode->status = MODE_UNVERIFIED;
100 if (connector->force) {
101 if (connector->force == DRM_FORCE_ON)
102 connector->status = connector_status_connected;
104 connector->status = connector_status_disconnected;
105 if (connector->funcs->force)
106 connector->funcs->force(connector);
108 connector->status = connector->funcs->detect(connector, true);
109 drm_kms_helper_poll_enable(dev);
112 if (connector->status == connector_status_disconnected) {
113 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
114 connector->base.id, drm_get_connector_name(connector));
115 drm_mode_connector_update_edid_property(connector, NULL);
119 count = (*connector_funcs->get_modes)(connector);
120 if (count == 0 && connector->status == connector_status_connected)
121 count = drm_add_modes_noedid(connector, 1024, 768);
125 drm_mode_connector_list_update(connector);
128 drm_mode_validate_size(dev, &connector->modes, maxX,
131 if (connector->interlace_allowed)
132 mode_flags |= DRM_MODE_FLAG_INTERLACE;
133 if (connector->doublescan_allowed)
134 mode_flags |= DRM_MODE_FLAG_DBLSCAN;
135 drm_mode_validate_flag(connector, mode_flags);
137 list_for_each_entry_safe(mode, t, &connector->modes, head) {
138 if (mode->status == MODE_OK)
139 mode->status = connector_funcs->mode_valid(connector,
144 drm_mode_prune_invalid(dev, &connector->modes, true);
146 if (list_empty(&connector->modes))
149 drm_mode_sort(&connector->modes);
151 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
152 drm_get_connector_name(connector));
153 list_for_each_entry_safe(mode, t, &connector->modes, head) {
154 mode->vrefresh = drm_mode_vrefresh(mode);
156 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
157 drm_mode_debug_printmodeline(mode);
162 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
165 * drm_helper_encoder_in_use - check if a given encoder is in use
166 * @encoder: encoder to check
169 * Caller must hold mode config lock.
171 * Walk @encoders's DRM device's mode_config and see if it's in use.
174 * True if @encoder is part of the mode_config, false otherwise.
176 bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
178 struct drm_connector *connector;
179 struct drm_device *dev = encoder->dev;
180 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
181 if (connector->encoder == encoder)
185 EXPORT_SYMBOL(drm_helper_encoder_in_use);
188 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
189 * @crtc: CRTC to check
192 * Caller must hold mode config lock.
194 * Walk @crtc's DRM device's mode_config and see if it's in use.
197 * True if @crtc is part of the mode_config, false otherwise.
199 bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
201 struct drm_encoder *encoder;
202 struct drm_device *dev = crtc->dev;
203 /* FIXME: Locking around list access? */
204 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
205 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
209 EXPORT_SYMBOL(drm_helper_crtc_in_use);
212 drm_encoder_disable(struct drm_encoder *encoder)
214 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
216 if (encoder_funcs->disable)
217 (*encoder_funcs->disable)(encoder);
219 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
223 * drm_helper_disable_unused_functions - disable unused objects
227 * Caller must hold mode config lock.
229 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
230 * by calling its dpms function, which should power it off.
232 void drm_helper_disable_unused_functions(struct drm_device *dev)
234 struct drm_encoder *encoder;
235 struct drm_connector *connector;
236 struct drm_crtc *crtc;
238 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
239 if (!connector->encoder)
241 if (connector->status == connector_status_disconnected)
242 connector->encoder = NULL;
245 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
246 if (!drm_helper_encoder_in_use(encoder)) {
247 drm_encoder_disable(encoder);
248 /* disconnector encoder from any connector */
249 encoder->crtc = NULL;
253 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
254 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
255 crtc->enabled = drm_helper_crtc_in_use(crtc);
256 if (!crtc->enabled) {
257 if (crtc_funcs->disable)
258 (*crtc_funcs->disable)(crtc);
260 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
265 EXPORT_SYMBOL(drm_helper_disable_unused_functions);
268 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
269 * @encoder: encoder to test
270 * @crtc: crtc to test
272 * Return false if @encoder can't be driven by @crtc, true otherwise.
274 static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
275 struct drm_crtc *crtc)
277 struct drm_device *dev;
278 struct drm_crtc *tmp;
281 WARN(!crtc, "checking null crtc?\n");
285 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
291 if (encoder->possible_crtcs & crtc_mask)
297 * Check the CRTC we're going to map each output to vs. its current
298 * CRTC. If they don't match, we have to disable the output and the CRTC
299 * since the driver will have to re-route things.
302 drm_crtc_prepare_encoders(struct drm_device *dev)
304 struct drm_encoder_helper_funcs *encoder_funcs;
305 struct drm_encoder *encoder;
307 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
308 encoder_funcs = encoder->helper_private;
309 /* Disable unused encoders */
310 if (encoder->crtc == NULL)
311 drm_encoder_disable(encoder);
312 /* Disable encoders whose CRTC is about to change */
313 if (encoder_funcs->get_crtc &&
314 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
315 drm_encoder_disable(encoder);
320 * drm_crtc_set_mode - set a mode
321 * @crtc: CRTC to program
327 * Caller must hold mode config lock.
329 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
330 * to fixup or reject the mode prior to trying to set it.
333 * True if the mode was set successfully, or false otherwise.
335 bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
336 struct drm_display_mode *mode,
338 struct drm_framebuffer *old_fb)
340 struct drm_device *dev = crtc->dev;
341 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
342 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
343 struct drm_encoder_helper_funcs *encoder_funcs;
344 int saved_x, saved_y;
345 struct drm_encoder *encoder;
348 crtc->enabled = drm_helper_crtc_in_use(crtc);
352 adjusted_mode = drm_mode_duplicate(dev, mode);
354 saved_hwmode = crtc->hwmode;
355 saved_mode = crtc->mode;
359 /* Update crtc values up front so the driver can rely on them for mode
366 /* Pass our mode to the connectors and the CRTC to give them a chance to
367 * adjust it according to limitations or connector properties, and also
368 * a chance to reject the mode entirely.
370 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
372 if (encoder->crtc != crtc)
374 encoder_funcs = encoder->helper_private;
375 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
377 DRM_DEBUG_KMS("Encoder fixup failed\n");
382 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
383 DRM_DEBUG_KMS("CRTC fixup failed\n");
386 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
388 /* Prepare the encoders and CRTCs before setting the mode. */
389 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
391 if (encoder->crtc != crtc)
393 encoder_funcs = encoder->helper_private;
394 /* Disable the encoders as the first thing we do. */
395 encoder_funcs->prepare(encoder);
398 drm_crtc_prepare_encoders(dev);
400 crtc_funcs->prepare(crtc);
402 /* Set up the DPLL and any encoders state that needs to adjust or depend
405 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
409 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
411 if (encoder->crtc != crtc)
414 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
415 encoder->base.id, drm_get_encoder_name(encoder),
416 mode->base.id, mode->name);
417 encoder_funcs = encoder->helper_private;
418 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
421 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
422 crtc_funcs->commit(crtc);
424 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
426 if (encoder->crtc != crtc)
429 encoder_funcs = encoder->helper_private;
430 encoder_funcs->commit(encoder);
434 /* Store real post-adjustment hardware mode. */
435 crtc->hwmode = *adjusted_mode;
437 /* Calculate and store various constants which
438 * are later needed by vblank and swap-completion
439 * timestamping. They are derived from true hwmode.
441 drm_calc_timestamping_constants(crtc);
443 /* FIXME: add subpixel order */
445 drm_mode_destroy(dev, adjusted_mode);
447 crtc->hwmode = saved_hwmode;
448 crtc->mode = saved_mode;
455 EXPORT_SYMBOL(drm_crtc_helper_set_mode);
459 * drm_crtc_helper_set_config - set a new config from userspace
460 * @crtc: CRTC to setup
461 * @crtc_info: user provided configuration
462 * @new_mode: new mode to set
463 * @connector_set: set of connectors for the new config
464 * @fb: new framebuffer
467 * Caller must hold mode config lock.
469 * Setup a new configuration, provided by the user in @crtc_info, and enable
475 int drm_crtc_helper_set_config(struct drm_mode_set *set)
477 struct drm_device *dev;
478 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
479 struct drm_encoder *save_encoders, *new_encoder, *encoder;
480 struct drm_framebuffer *old_fb = NULL;
481 bool mode_changed = false; /* if true do a full mode set */
482 bool fb_changed = false; /* if true and !mode_changed just do a flip */
483 struct drm_connector *save_connectors, *connector;
484 int count = 0, ro, fail = 0;
485 struct drm_crtc_helper_funcs *crtc_funcs;
497 if (!set->crtc->helper_private)
500 crtc_funcs = set->crtc->helper_private;
506 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
507 set->crtc->base.id, set->fb->base.id,
508 (int)set->num_connectors, set->x, set->y);
510 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
512 set->num_connectors = 0;
515 dev = set->crtc->dev;
517 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
519 save_crtcs = kzalloc(dev->mode_config.num_crtc *
520 sizeof(struct drm_crtc), GFP_KERNEL);
524 save_encoders = kzalloc(dev->mode_config.num_encoder *
525 sizeof(struct drm_encoder), GFP_KERNEL);
526 if (!save_encoders) {
531 save_connectors = kzalloc(dev->mode_config.num_connector *
532 sizeof(struct drm_connector), GFP_KERNEL);
533 if (!save_connectors) {
535 kfree(save_encoders);
539 /* Copy data. Note that driver private data is not affected.
540 * Should anything bad happen only the expected state is
541 * restored, not the drivers personal bookkeeping.
544 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
545 save_crtcs[count++] = *crtc;
549 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
550 save_encoders[count++] = *encoder;
554 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
555 save_connectors[count++] = *connector;
558 /* We should be able to check here if the fb has the same properties
559 * and then just flip_or_move it */
560 if (set->crtc->fb != set->fb) {
561 /* If we have no fb then treat it as a full mode set */
562 if (set->crtc->fb == NULL) {
563 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
565 } else if (set->fb == NULL) {
567 } else if (set->fb->depth != set->crtc->fb->depth) {
569 } else if (set->fb->bits_per_pixel !=
570 set->crtc->fb->bits_per_pixel) {
576 if (set->x != set->crtc->x || set->y != set->crtc->y)
579 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
580 DRM_DEBUG_KMS("modes are different, full mode set\n");
581 drm_mode_debug_printmodeline(&set->crtc->mode);
582 drm_mode_debug_printmodeline(set->mode);
586 /* a) traverse passed in connector list and get encoders for them */
588 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
589 struct drm_connector_helper_funcs *connector_funcs =
590 connector->helper_private;
591 new_encoder = connector->encoder;
592 for (ro = 0; ro < set->num_connectors; ro++) {
593 if (set->connectors[ro] == connector) {
594 new_encoder = connector_funcs->best_encoder(connector);
595 /* if we can't get an encoder for a connector
596 we are setting now - then fail */
597 if (new_encoder == NULL)
598 /* don't break so fail path works correct */
604 if (new_encoder != connector->encoder) {
605 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
607 /* If the encoder is reused for another connector, then
608 * the appropriate crtc will be set later.
610 if (connector->encoder)
611 connector->encoder->crtc = NULL;
612 connector->encoder = new_encoder;
622 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
623 if (!connector->encoder)
626 if (connector->encoder->crtc == set->crtc)
629 new_crtc = connector->encoder->crtc;
631 for (ro = 0; ro < set->num_connectors; ro++) {
632 if (set->connectors[ro] == connector)
633 new_crtc = set->crtc;
636 /* Make sure the new CRTC will work with the encoder */
638 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
642 if (new_crtc != connector->encoder->crtc) {
643 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
645 connector->encoder->crtc = new_crtc;
648 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
649 connector->base.id, drm_get_connector_name(connector),
652 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
653 connector->base.id, drm_get_connector_name(connector));
657 /* mode_set_base is not a required function */
658 if (fb_changed && !crtc_funcs->mode_set_base)
662 set->crtc->enabled = drm_helper_crtc_in_use(set->crtc);
663 if (set->crtc->enabled) {
664 DRM_DEBUG_KMS("attempting to set mode from"
666 drm_mode_debug_printmodeline(set->mode);
667 old_fb = set->crtc->fb;
668 set->crtc->fb = set->fb;
669 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
672 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
674 set->crtc->fb = old_fb;
678 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
679 for (i = 0; i < set->num_connectors; i++) {
680 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
681 drm_get_connector_name(set->connectors[i]));
682 set->connectors[i]->dpms = DRM_MODE_DPMS_ON;
685 drm_helper_disable_unused_functions(dev);
686 } else if (fb_changed) {
687 set->crtc->x = set->x;
688 set->crtc->y = set->y;
690 old_fb = set->crtc->fb;
691 if (set->crtc->fb != set->fb)
692 set->crtc->fb = set->fb;
693 ret = crtc_funcs->mode_set_base(set->crtc,
694 set->x, set->y, old_fb);
696 set->crtc->fb = old_fb;
701 kfree(save_connectors);
702 kfree(save_encoders);
707 /* Restore all previous data. */
709 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
710 *crtc = save_crtcs[count++];
714 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
715 *encoder = save_encoders[count++];
719 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
720 *connector = save_connectors[count++];
723 kfree(save_connectors);
724 kfree(save_encoders);
728 EXPORT_SYMBOL(drm_crtc_helper_set_config);
730 static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
732 int dpms = DRM_MODE_DPMS_OFF;
733 struct drm_connector *connector;
734 struct drm_device *dev = encoder->dev;
736 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
737 if (connector->encoder == encoder)
738 if (connector->dpms < dpms)
739 dpms = connector->dpms;
743 static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
745 int dpms = DRM_MODE_DPMS_OFF;
746 struct drm_connector *connector;
747 struct drm_device *dev = crtc->dev;
749 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
750 if (connector->encoder && connector->encoder->crtc == crtc)
751 if (connector->dpms < dpms)
752 dpms = connector->dpms;
757 * drm_helper_connector_dpms
758 * @connector affected connector
761 * Calls the low-level connector DPMS function, then
762 * calls appropriate encoder and crtc DPMS functions as well
764 void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
766 struct drm_encoder *encoder = connector->encoder;
767 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
770 if (mode == connector->dpms)
773 old_dpms = connector->dpms;
774 connector->dpms = mode;
776 /* from off to on, do crtc then encoder */
777 if (mode < old_dpms) {
779 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
780 if (crtc_funcs->dpms)
781 (*crtc_funcs->dpms) (crtc,
782 drm_helper_choose_crtc_dpms(crtc));
785 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
786 if (encoder_funcs->dpms)
787 (*encoder_funcs->dpms) (encoder,
788 drm_helper_choose_encoder_dpms(encoder));
792 /* from on to off, do encoder then crtc */
793 if (mode > old_dpms) {
795 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
796 if (encoder_funcs->dpms)
797 (*encoder_funcs->dpms) (encoder,
798 drm_helper_choose_encoder_dpms(encoder));
801 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
802 if (crtc_funcs->dpms)
803 (*crtc_funcs->dpms) (crtc,
804 drm_helper_choose_crtc_dpms(crtc));
810 EXPORT_SYMBOL(drm_helper_connector_dpms);
812 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
813 struct drm_mode_fb_cmd *mode_cmd)
815 fb->width = mode_cmd->width;
816 fb->height = mode_cmd->height;
817 fb->pitch = mode_cmd->pitch;
818 fb->bits_per_pixel = mode_cmd->bpp;
819 fb->depth = mode_cmd->depth;
823 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
825 int drm_helper_resume_force_mode(struct drm_device *dev)
827 struct drm_crtc *crtc;
828 struct drm_encoder *encoder;
829 struct drm_encoder_helper_funcs *encoder_funcs;
830 struct drm_crtc_helper_funcs *crtc_funcs;
833 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
838 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
839 crtc->x, crtc->y, crtc->fb);
842 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
844 /* Turn off outputs that were already powered off */
845 if (drm_helper_choose_crtc_dpms(crtc)) {
846 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
848 if(encoder->crtc != crtc)
851 encoder_funcs = encoder->helper_private;
852 if (encoder_funcs->dpms)
853 (*encoder_funcs->dpms) (encoder,
854 drm_helper_choose_encoder_dpms(encoder));
857 crtc_funcs = crtc->helper_private;
858 if (crtc_funcs->dpms)
859 (*crtc_funcs->dpms) (crtc,
860 drm_helper_choose_crtc_dpms(crtc));
863 /* disable the unused connectors while restoring the modesetting */
864 drm_helper_disable_unused_functions(dev);
867 EXPORT_SYMBOL(drm_helper_resume_force_mode);
869 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
870 static void output_poll_execute(struct work_struct *work)
872 struct delayed_work *delayed_work = to_delayed_work(work);
873 struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
874 struct drm_connector *connector;
875 enum drm_connector_status old_status;
876 bool repoll = false, changed = false;
878 if (!drm_kms_helper_poll)
881 mutex_lock(&dev->mode_config.mutex);
882 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
884 /* if this is HPD or polled don't check it -
885 TV out for instance */
886 if (!connector->polled)
889 else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT))
892 old_status = connector->status;
893 /* if we are connected and don't want to poll for disconnect
895 if (old_status == connector_status_connected &&
896 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) &&
897 !(connector->polled & DRM_CONNECTOR_POLL_HPD))
900 connector->status = connector->funcs->detect(connector, false);
901 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
903 drm_get_connector_name(connector),
904 old_status, connector->status);
905 if (old_status != connector->status)
909 mutex_unlock(&dev->mode_config.mutex);
912 /* send a uevent + call fbdev */
913 drm_sysfs_hotplug_event(dev);
914 if (dev->mode_config.funcs->output_poll_changed)
915 dev->mode_config.funcs->output_poll_changed(dev);
919 queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
922 void drm_kms_helper_poll_disable(struct drm_device *dev)
924 if (!dev->mode_config.poll_enabled)
926 cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
928 EXPORT_SYMBOL(drm_kms_helper_poll_disable);
930 void drm_kms_helper_poll_enable(struct drm_device *dev)
933 struct drm_connector *connector;
935 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
938 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
939 if (connector->polled)
944 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
946 EXPORT_SYMBOL(drm_kms_helper_poll_enable);
948 void drm_kms_helper_poll_init(struct drm_device *dev)
950 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
951 dev->mode_config.poll_enabled = true;
953 drm_kms_helper_poll_enable(dev);
955 EXPORT_SYMBOL(drm_kms_helper_poll_init);
957 void drm_kms_helper_poll_fini(struct drm_device *dev)
959 drm_kms_helper_poll_disable(dev);
961 EXPORT_SYMBOL(drm_kms_helper_poll_fini);
963 void drm_helper_hpd_irq_event(struct drm_device *dev)
965 if (!dev->mode_config.poll_enabled)
968 /* kill timer and schedule immediate execution, this doesn't block */
969 cancel_delayed_work(&dev->mode_config.output_poll_work);
970 if (drm_kms_helper_poll)
971 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
973 EXPORT_SYMBOL(drm_helper_hpd_irq_event);