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>
33 #include <linux/moduleparam.h>
36 #include <drm/drm_crtc.h>
37 #include <drm/drm_fourcc.h>
38 #include <drm/drm_crtc_helper.h>
39 #include <drm/drm_fb_helper.h>
40 #include <drm/drm_edid.h>
42 void drm_helper_move_panel_connectors_to_head(struct drm_device *dev)
44 struct drm_connector *connector, *tmp;
45 struct list_head panel_list;
47 INIT_LIST_HEAD(&panel_list);
49 list_for_each_entry_safe(connector, tmp,
50 &dev->mode_config.connector_list, head) {
51 if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
52 connector->connector_type == DRM_MODE_CONNECTOR_eDP)
53 list_move_tail(&connector->head, &panel_list);
56 list_splice(&panel_list, &dev->mode_config.connector_list);
58 EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head);
60 static bool drm_kms_helper_poll = true;
61 module_param_named(poll, drm_kms_helper_poll, bool, 0600);
63 static void drm_mode_validate_flag(struct drm_connector *connector,
66 struct drm_display_mode *mode;
68 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
71 list_for_each_entry(mode, &connector->modes, head) {
72 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
73 !(flags & DRM_MODE_FLAG_INTERLACE))
74 mode->status = MODE_NO_INTERLACE;
75 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
76 !(flags & DRM_MODE_FLAG_DBLSCAN))
77 mode->status = MODE_NO_DBLESCAN;
84 * drm_helper_probe_single_connector_modes - get complete set of display modes
86 * @maxX: max width for modes
87 * @maxY: max height for modes
90 * Caller must hold mode config lock.
92 * Based on @dev's mode_config layout, scan all the connectors and try to detect
93 * modes on them. Modes will first be added to the connector's probed_modes
94 * list, then culled (based on validity and the @maxX, @maxY parameters) and
95 * put into the normal modes list.
97 * Intended to be used either at bootup time or when major configuration
98 * changes have occurred.
100 * FIXME: take into account monitor limits
103 * Number of modes found on @connector.
105 int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
106 uint32_t maxX, uint32_t maxY)
108 struct drm_device *dev = connector->dev;
109 struct drm_display_mode *mode;
110 struct drm_connector_helper_funcs *connector_funcs =
111 connector->helper_private;
115 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
116 drm_get_connector_name(connector));
117 /* set all modes to the unverified state */
118 list_for_each_entry(mode, &connector->modes, head)
119 mode->status = MODE_UNVERIFIED;
121 if (connector->force) {
122 if (connector->force == DRM_FORCE_ON)
123 connector->status = connector_status_connected;
125 connector->status = connector_status_disconnected;
126 if (connector->funcs->force)
127 connector->funcs->force(connector);
129 connector->status = connector->funcs->detect(connector, true);
130 drm_kms_helper_poll_enable(dev);
133 if (connector->status == connector_status_disconnected) {
134 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
135 connector->base.id, drm_get_connector_name(connector));
136 drm_mode_connector_update_edid_property(connector, NULL);
140 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
141 count = drm_load_edid_firmware(connector);
144 count = (*connector_funcs->get_modes)(connector);
146 if (count == 0 && connector->status == connector_status_connected)
147 count = drm_add_modes_noedid(connector, 1024, 768);
151 drm_mode_connector_list_update(connector);
154 drm_mode_validate_size(dev, &connector->modes, maxX,
157 if (connector->interlace_allowed)
158 mode_flags |= DRM_MODE_FLAG_INTERLACE;
159 if (connector->doublescan_allowed)
160 mode_flags |= DRM_MODE_FLAG_DBLSCAN;
161 drm_mode_validate_flag(connector, mode_flags);
163 list_for_each_entry(mode, &connector->modes, head) {
164 if (mode->status == MODE_OK)
165 mode->status = connector_funcs->mode_valid(connector,
170 drm_mode_prune_invalid(dev, &connector->modes, true);
172 if (list_empty(&connector->modes))
175 drm_mode_sort(&connector->modes);
177 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
178 drm_get_connector_name(connector));
179 list_for_each_entry(mode, &connector->modes, head) {
180 mode->vrefresh = drm_mode_vrefresh(mode);
182 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
183 drm_mode_debug_printmodeline(mode);
188 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
191 * drm_helper_encoder_in_use - check if a given encoder is in use
192 * @encoder: encoder to check
195 * Caller must hold mode config lock.
197 * Walk @encoders's DRM device's mode_config and see if it's in use.
200 * True if @encoder is part of the mode_config, false otherwise.
202 bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
204 struct drm_connector *connector;
205 struct drm_device *dev = encoder->dev;
206 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
207 if (connector->encoder == encoder)
211 EXPORT_SYMBOL(drm_helper_encoder_in_use);
214 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
215 * @crtc: CRTC to check
218 * Caller must hold mode config lock.
220 * Walk @crtc's DRM device's mode_config and see if it's in use.
223 * True if @crtc is part of the mode_config, false otherwise.
225 bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
227 struct drm_encoder *encoder;
228 struct drm_device *dev = crtc->dev;
229 /* FIXME: Locking around list access? */
230 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
231 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
235 EXPORT_SYMBOL(drm_helper_crtc_in_use);
238 drm_encoder_disable(struct drm_encoder *encoder)
240 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
242 if (encoder_funcs->disable)
243 (*encoder_funcs->disable)(encoder);
245 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
249 * drm_helper_disable_unused_functions - disable unused objects
253 * Caller must hold mode config lock.
255 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
256 * by calling its dpms function, which should power it off.
258 void drm_helper_disable_unused_functions(struct drm_device *dev)
260 struct drm_encoder *encoder;
261 struct drm_connector *connector;
262 struct drm_crtc *crtc;
264 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
265 if (!connector->encoder)
267 if (connector->status == connector_status_disconnected)
268 connector->encoder = NULL;
271 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
272 if (!drm_helper_encoder_in_use(encoder)) {
273 drm_encoder_disable(encoder);
274 /* disconnector encoder from any connector */
275 encoder->crtc = NULL;
279 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
280 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
281 crtc->enabled = drm_helper_crtc_in_use(crtc);
282 if (!crtc->enabled) {
283 if (crtc_funcs->disable)
284 (*crtc_funcs->disable)(crtc);
286 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
291 EXPORT_SYMBOL(drm_helper_disable_unused_functions);
294 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
295 * @encoder: encoder to test
296 * @crtc: crtc to test
298 * Return false if @encoder can't be driven by @crtc, true otherwise.
300 static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
301 struct drm_crtc *crtc)
303 struct drm_device *dev;
304 struct drm_crtc *tmp;
307 WARN(!crtc, "checking null crtc?\n");
311 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
317 if (encoder->possible_crtcs & crtc_mask)
323 * Check the CRTC we're going to map each output to vs. its current
324 * CRTC. If they don't match, we have to disable the output and the CRTC
325 * since the driver will have to re-route things.
328 drm_crtc_prepare_encoders(struct drm_device *dev)
330 struct drm_encoder_helper_funcs *encoder_funcs;
331 struct drm_encoder *encoder;
333 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
334 encoder_funcs = encoder->helper_private;
335 /* Disable unused encoders */
336 if (encoder->crtc == NULL)
337 drm_encoder_disable(encoder);
338 /* Disable encoders whose CRTC is about to change */
339 if (encoder_funcs->get_crtc &&
340 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
341 drm_encoder_disable(encoder);
346 * drm_crtc_set_mode - set a mode
347 * @crtc: CRTC to program
349 * @x: horizontal offset into the surface
350 * @y: vertical offset into the surface
353 * Caller must hold mode config lock.
355 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
356 * to fixup or reject the mode prior to trying to set it.
359 * True if the mode was set successfully, or false otherwise.
361 bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
362 struct drm_display_mode *mode,
364 struct drm_framebuffer *old_fb)
366 struct drm_device *dev = crtc->dev;
367 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
368 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
369 struct drm_encoder_helper_funcs *encoder_funcs;
370 int saved_x, saved_y;
371 struct drm_encoder *encoder;
374 crtc->enabled = drm_helper_crtc_in_use(crtc);
378 adjusted_mode = drm_mode_duplicate(dev, mode);
382 saved_hwmode = crtc->hwmode;
383 saved_mode = crtc->mode;
387 /* Update crtc values up front so the driver can rely on them for mode
394 /* Pass our mode to the connectors and the CRTC to give them a chance to
395 * adjust it according to limitations or connector properties, and also
396 * a chance to reject the mode entirely.
398 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
400 if (encoder->crtc != crtc)
402 encoder_funcs = encoder->helper_private;
403 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
405 DRM_DEBUG_KMS("Encoder fixup failed\n");
410 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
411 DRM_DEBUG_KMS("CRTC fixup failed\n");
414 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
416 /* Prepare the encoders and CRTCs before setting the mode. */
417 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
419 if (encoder->crtc != crtc)
421 encoder_funcs = encoder->helper_private;
422 /* Disable the encoders as the first thing we do. */
423 encoder_funcs->prepare(encoder);
426 drm_crtc_prepare_encoders(dev);
428 crtc_funcs->prepare(crtc);
430 /* Set up the DPLL and any encoders state that needs to adjust or depend
433 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
437 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
439 if (encoder->crtc != crtc)
442 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
443 encoder->base.id, drm_get_encoder_name(encoder),
444 mode->base.id, mode->name);
445 encoder_funcs = encoder->helper_private;
446 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
449 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
450 crtc_funcs->commit(crtc);
452 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
454 if (encoder->crtc != crtc)
457 encoder_funcs = encoder->helper_private;
458 encoder_funcs->commit(encoder);
462 /* Store real post-adjustment hardware mode. */
463 crtc->hwmode = *adjusted_mode;
465 /* Calculate and store various constants which
466 * are later needed by vblank and swap-completion
467 * timestamping. They are derived from true hwmode.
469 drm_calc_timestamping_constants(crtc);
471 /* FIXME: add subpixel order */
473 drm_mode_destroy(dev, adjusted_mode);
475 crtc->hwmode = saved_hwmode;
476 crtc->mode = saved_mode;
483 EXPORT_SYMBOL(drm_crtc_helper_set_mode);
487 drm_crtc_helper_disable(struct drm_crtc *crtc)
489 struct drm_device *dev = crtc->dev;
490 struct drm_connector *connector;
491 struct drm_encoder *encoder;
493 /* Decouple all encoders and their attached connectors from this crtc */
494 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
495 if (encoder->crtc != crtc)
498 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
499 if (connector->encoder != encoder)
502 connector->encoder = NULL;
506 drm_helper_disable_unused_functions(dev);
511 * drm_crtc_helper_set_config - set a new config from userspace
512 * @crtc: CRTC to setup
513 * @crtc_info: user provided configuration
514 * @new_mode: new mode to set
515 * @connector_set: set of connectors for the new config
516 * @fb: new framebuffer
519 * Caller must hold mode config lock.
521 * Setup a new configuration, provided by the user in @crtc_info, and enable
527 int drm_crtc_helper_set_config(struct drm_mode_set *set)
529 struct drm_device *dev;
530 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
531 struct drm_encoder *save_encoders, *new_encoder, *encoder;
532 struct drm_framebuffer *old_fb = NULL;
533 bool mode_changed = false; /* if true do a full mode set */
534 bool fb_changed = false; /* if true and !mode_changed just do a flip */
535 struct drm_connector *save_connectors, *connector;
536 int count = 0, ro, fail = 0;
537 struct drm_crtc_helper_funcs *crtc_funcs;
538 struct drm_mode_set save_set;
550 if (!set->crtc->helper_private)
553 crtc_funcs = set->crtc->helper_private;
559 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
560 set->crtc->base.id, set->fb->base.id,
561 (int)set->num_connectors, set->x, set->y);
563 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
564 return drm_crtc_helper_disable(set->crtc);
567 dev = set->crtc->dev;
569 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
571 save_crtcs = kzalloc(dev->mode_config.num_crtc *
572 sizeof(struct drm_crtc), GFP_KERNEL);
576 save_encoders = kzalloc(dev->mode_config.num_encoder *
577 sizeof(struct drm_encoder), GFP_KERNEL);
578 if (!save_encoders) {
583 save_connectors = kzalloc(dev->mode_config.num_connector *
584 sizeof(struct drm_connector), GFP_KERNEL);
585 if (!save_connectors) {
587 kfree(save_encoders);
591 /* Copy data. Note that driver private data is not affected.
592 * Should anything bad happen only the expected state is
593 * restored, not the drivers personal bookkeeping.
596 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
597 save_crtcs[count++] = *crtc;
601 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
602 save_encoders[count++] = *encoder;
606 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
607 save_connectors[count++] = *connector;
610 save_set.crtc = set->crtc;
611 save_set.mode = &set->crtc->mode;
612 save_set.x = set->crtc->x;
613 save_set.y = set->crtc->y;
614 save_set.fb = set->crtc->fb;
616 /* We should be able to check here if the fb has the same properties
617 * and then just flip_or_move it */
618 if (set->crtc->fb != set->fb) {
619 /* If we have no fb then treat it as a full mode set */
620 if (set->crtc->fb == NULL) {
621 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
623 } else if (set->fb == NULL) {
625 } else if (set->fb->depth != set->crtc->fb->depth) {
627 } else if (set->fb->bits_per_pixel !=
628 set->crtc->fb->bits_per_pixel) {
634 if (set->x != set->crtc->x || set->y != set->crtc->y)
637 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
638 DRM_DEBUG_KMS("modes are different, full mode set\n");
639 drm_mode_debug_printmodeline(&set->crtc->mode);
640 drm_mode_debug_printmodeline(set->mode);
644 /* a) traverse passed in connector list and get encoders for them */
646 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
647 struct drm_connector_helper_funcs *connector_funcs =
648 connector->helper_private;
649 new_encoder = connector->encoder;
650 for (ro = 0; ro < set->num_connectors; ro++) {
651 if (set->connectors[ro] == connector) {
652 new_encoder = connector_funcs->best_encoder(connector);
653 /* if we can't get an encoder for a connector
654 we are setting now - then fail */
655 if (new_encoder == NULL)
656 /* don't break so fail path works correct */
662 if (new_encoder != connector->encoder) {
663 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
665 /* If the encoder is reused for another connector, then
666 * the appropriate crtc will be set later.
668 if (connector->encoder)
669 connector->encoder->crtc = NULL;
670 connector->encoder = new_encoder;
680 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
681 if (!connector->encoder)
684 if (connector->encoder->crtc == set->crtc)
687 new_crtc = connector->encoder->crtc;
689 for (ro = 0; ro < set->num_connectors; ro++) {
690 if (set->connectors[ro] == connector)
691 new_crtc = set->crtc;
694 /* Make sure the new CRTC will work with the encoder */
696 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
700 if (new_crtc != connector->encoder->crtc) {
701 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
703 connector->encoder->crtc = new_crtc;
706 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
707 connector->base.id, drm_get_connector_name(connector),
710 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
711 connector->base.id, drm_get_connector_name(connector));
715 /* mode_set_base is not a required function */
716 if (fb_changed && !crtc_funcs->mode_set_base)
720 set->crtc->enabled = drm_helper_crtc_in_use(set->crtc);
721 if (set->crtc->enabled) {
722 DRM_DEBUG_KMS("attempting to set mode from"
724 drm_mode_debug_printmodeline(set->mode);
725 old_fb = set->crtc->fb;
726 set->crtc->fb = set->fb;
727 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
730 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
732 set->crtc->fb = old_fb;
736 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
737 for (i = 0; i < set->num_connectors; i++) {
738 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
739 drm_get_connector_name(set->connectors[i]));
740 set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
743 drm_helper_disable_unused_functions(dev);
744 } else if (fb_changed) {
745 set->crtc->x = set->x;
746 set->crtc->y = set->y;
748 old_fb = set->crtc->fb;
749 if (set->crtc->fb != set->fb)
750 set->crtc->fb = set->fb;
751 ret = crtc_funcs->mode_set_base(set->crtc,
752 set->x, set->y, old_fb);
754 set->crtc->fb = old_fb;
759 kfree(save_connectors);
760 kfree(save_encoders);
765 /* Restore all previous data. */
767 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
768 *crtc = save_crtcs[count++];
772 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
773 *encoder = save_encoders[count++];
777 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
778 *connector = save_connectors[count++];
781 /* Try to restore the config */
783 !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
784 save_set.y, save_set.fb))
785 DRM_ERROR("failed to restore config after modeset failure\n");
787 kfree(save_connectors);
788 kfree(save_encoders);
792 EXPORT_SYMBOL(drm_crtc_helper_set_config);
794 static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
796 int dpms = DRM_MODE_DPMS_OFF;
797 struct drm_connector *connector;
798 struct drm_device *dev = encoder->dev;
800 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
801 if (connector->encoder == encoder)
802 if (connector->dpms < dpms)
803 dpms = connector->dpms;
807 static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
809 int dpms = DRM_MODE_DPMS_OFF;
810 struct drm_connector *connector;
811 struct drm_device *dev = crtc->dev;
813 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
814 if (connector->encoder && connector->encoder->crtc == crtc)
815 if (connector->dpms < dpms)
816 dpms = connector->dpms;
821 * drm_helper_connector_dpms
822 * @connector affected connector
825 * Calls the low-level connector DPMS function, then
826 * calls appropriate encoder and crtc DPMS functions as well
828 void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
830 struct drm_encoder *encoder = connector->encoder;
831 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
834 if (mode == connector->dpms)
837 old_dpms = connector->dpms;
838 connector->dpms = mode;
840 /* from off to on, do crtc then encoder */
841 if (mode < old_dpms) {
843 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
844 if (crtc_funcs->dpms)
845 (*crtc_funcs->dpms) (crtc,
846 drm_helper_choose_crtc_dpms(crtc));
849 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
850 if (encoder_funcs->dpms)
851 (*encoder_funcs->dpms) (encoder,
852 drm_helper_choose_encoder_dpms(encoder));
856 /* from on to off, do encoder then crtc */
857 if (mode > old_dpms) {
859 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
860 if (encoder_funcs->dpms)
861 (*encoder_funcs->dpms) (encoder,
862 drm_helper_choose_encoder_dpms(encoder));
865 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
866 if (crtc_funcs->dpms)
867 (*crtc_funcs->dpms) (crtc,
868 drm_helper_choose_crtc_dpms(crtc));
874 EXPORT_SYMBOL(drm_helper_connector_dpms);
876 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
877 struct drm_mode_fb_cmd2 *mode_cmd)
881 fb->width = mode_cmd->width;
882 fb->height = mode_cmd->height;
883 for (i = 0; i < 4; i++) {
884 fb->pitches[i] = mode_cmd->pitches[i];
885 fb->offsets[i] = mode_cmd->offsets[i];
887 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth,
888 &fb->bits_per_pixel);
889 fb->pixel_format = mode_cmd->pixel_format;
893 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
895 int drm_helper_resume_force_mode(struct drm_device *dev)
897 struct drm_crtc *crtc;
898 struct drm_encoder *encoder;
899 struct drm_encoder_helper_funcs *encoder_funcs;
900 struct drm_crtc_helper_funcs *crtc_funcs;
903 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
908 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
909 crtc->x, crtc->y, crtc->fb);
912 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
914 /* Turn off outputs that were already powered off */
915 if (drm_helper_choose_crtc_dpms(crtc)) {
916 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
918 if(encoder->crtc != crtc)
921 encoder_funcs = encoder->helper_private;
922 if (encoder_funcs->dpms)
923 (*encoder_funcs->dpms) (encoder,
924 drm_helper_choose_encoder_dpms(encoder));
927 crtc_funcs = crtc->helper_private;
928 if (crtc_funcs->dpms)
929 (*crtc_funcs->dpms) (crtc,
930 drm_helper_choose_crtc_dpms(crtc));
933 /* disable the unused connectors while restoring the modesetting */
934 drm_helper_disable_unused_functions(dev);
937 EXPORT_SYMBOL(drm_helper_resume_force_mode);
939 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
940 static void output_poll_execute(struct work_struct *work)
942 struct delayed_work *delayed_work = to_delayed_work(work);
943 struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
944 struct drm_connector *connector;
945 enum drm_connector_status old_status;
946 bool repoll = false, changed = false;
948 if (!drm_kms_helper_poll)
951 mutex_lock(&dev->mode_config.mutex);
952 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
954 /* if this is HPD or polled don't check it -
955 TV out for instance */
956 if (!connector->polled)
959 else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT))
962 old_status = connector->status;
963 /* if we are connected and don't want to poll for disconnect
965 if (old_status == connector_status_connected &&
966 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) &&
967 !(connector->polled & DRM_CONNECTOR_POLL_HPD))
970 connector->status = connector->funcs->detect(connector, false);
971 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
973 drm_get_connector_name(connector),
974 old_status, connector->status);
975 if (old_status != connector->status)
979 mutex_unlock(&dev->mode_config.mutex);
982 /* send a uevent + call fbdev */
983 drm_sysfs_hotplug_event(dev);
984 if (dev->mode_config.funcs->output_poll_changed)
985 dev->mode_config.funcs->output_poll_changed(dev);
989 schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD);
992 void drm_kms_helper_poll_disable(struct drm_device *dev)
994 if (!dev->mode_config.poll_enabled)
996 cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
998 EXPORT_SYMBOL(drm_kms_helper_poll_disable);
1000 void drm_kms_helper_poll_enable(struct drm_device *dev)
1003 struct drm_connector *connector;
1005 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
1008 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
1009 if (connector->polled)
1014 schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
1016 EXPORT_SYMBOL(drm_kms_helper_poll_enable);
1018 void drm_kms_helper_poll_init(struct drm_device *dev)
1020 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
1021 dev->mode_config.poll_enabled = true;
1023 drm_kms_helper_poll_enable(dev);
1025 EXPORT_SYMBOL(drm_kms_helper_poll_init);
1027 void drm_kms_helper_poll_fini(struct drm_device *dev)
1029 drm_kms_helper_poll_disable(dev);
1031 EXPORT_SYMBOL(drm_kms_helper_poll_fini);
1033 void drm_helper_hpd_irq_event(struct drm_device *dev)
1035 if (!dev->mode_config.poll_enabled)
1038 /* kill timer and schedule immediate execution, this doesn't block */
1039 cancel_delayed_work(&dev->mode_config.output_poll_work);
1040 if (drm_kms_helper_poll)
1041 schedule_delayed_work(&dev->mode_config.output_poll_work, 0);
1043 EXPORT_SYMBOL(drm_helper_hpd_irq_event);