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>
37 #include "drm_fourcc.h"
38 #include "drm_crtc_helper.h"
39 #include "drm_fb_helper.h"
42 static bool drm_kms_helper_poll = true;
43 module_param_named(poll, drm_kms_helper_poll, bool, 0600);
45 static void drm_mode_validate_flag(struct drm_connector *connector,
48 struct drm_display_mode *mode;
50 if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
53 list_for_each_entry(mode, &connector->modes, head) {
54 if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
55 !(flags & DRM_MODE_FLAG_INTERLACE))
56 mode->status = MODE_NO_INTERLACE;
57 if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
58 !(flags & DRM_MODE_FLAG_DBLSCAN))
59 mode->status = MODE_NO_DBLESCAN;
66 * drm_helper_probe_single_connector_modes - get complete set of display modes
68 * @maxX: max width for modes
69 * @maxY: max height for modes
72 * Caller must hold mode config lock.
74 * Based on @dev's mode_config layout, scan all the connectors and try to detect
75 * modes on them. Modes will first be added to the connector's probed_modes
76 * list, then culled (based on validity and the @maxX, @maxY parameters) and
77 * put into the normal modes list.
79 * Intended to be used either at bootup time or when major configuration
80 * changes have occurred.
82 * FIXME: take into account monitor limits
85 * Number of modes found on @connector.
87 int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
88 uint32_t maxX, uint32_t maxY)
90 struct drm_device *dev = connector->dev;
91 struct drm_display_mode *mode;
92 struct drm_connector_helper_funcs *connector_funcs =
93 connector->helper_private;
97 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
98 drm_get_connector_name(connector));
99 /* set all modes to the unverified state */
100 list_for_each_entry(mode, &connector->modes, head)
101 mode->status = MODE_UNVERIFIED;
103 if (connector->force) {
104 if (connector->force == DRM_FORCE_ON)
105 connector->status = connector_status_connected;
107 connector->status = connector_status_disconnected;
108 if (connector->funcs->force)
109 connector->funcs->force(connector);
111 connector->status = connector->funcs->detect(connector, true);
112 drm_kms_helper_poll_enable(dev);
115 if (connector->status == connector_status_disconnected) {
116 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
117 connector->base.id, drm_get_connector_name(connector));
118 drm_mode_connector_update_edid_property(connector, NULL);
122 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
123 count = drm_load_edid_firmware(connector);
126 count = (*connector_funcs->get_modes)(connector);
128 if (count == 0 && connector->status == connector_status_connected)
129 count = drm_add_modes_noedid(connector, 1024, 768);
133 drm_mode_connector_list_update(connector);
136 drm_mode_validate_size(dev, &connector->modes, maxX,
139 if (connector->interlace_allowed)
140 mode_flags |= DRM_MODE_FLAG_INTERLACE;
141 if (connector->doublescan_allowed)
142 mode_flags |= DRM_MODE_FLAG_DBLSCAN;
143 drm_mode_validate_flag(connector, mode_flags);
145 list_for_each_entry(mode, &connector->modes, head) {
146 if (mode->status == MODE_OK)
147 mode->status = connector_funcs->mode_valid(connector,
152 drm_mode_prune_invalid(dev, &connector->modes, true);
154 if (list_empty(&connector->modes))
157 drm_mode_sort(&connector->modes);
159 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
160 drm_get_connector_name(connector));
161 list_for_each_entry(mode, &connector->modes, head) {
162 mode->vrefresh = drm_mode_vrefresh(mode);
164 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
165 drm_mode_debug_printmodeline(mode);
170 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
173 * drm_helper_encoder_in_use - check if a given encoder is in use
174 * @encoder: encoder to check
177 * Caller must hold mode config lock.
179 * Walk @encoders's DRM device's mode_config and see if it's in use.
182 * True if @encoder is part of the mode_config, false otherwise.
184 bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
186 struct drm_connector *connector;
187 struct drm_device *dev = encoder->dev;
188 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
189 if (connector->encoder == encoder)
193 EXPORT_SYMBOL(drm_helper_encoder_in_use);
196 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
197 * @crtc: CRTC to check
200 * Caller must hold mode config lock.
202 * Walk @crtc's DRM device's mode_config and see if it's in use.
205 * True if @crtc is part of the mode_config, false otherwise.
207 bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
209 struct drm_encoder *encoder;
210 struct drm_device *dev = crtc->dev;
211 /* FIXME: Locking around list access? */
212 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
213 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
217 EXPORT_SYMBOL(drm_helper_crtc_in_use);
220 drm_encoder_disable(struct drm_encoder *encoder)
222 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
224 if (encoder_funcs->disable)
225 (*encoder_funcs->disable)(encoder);
227 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
231 * drm_helper_disable_unused_functions - disable unused objects
235 * Caller must hold mode config lock.
237 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
238 * by calling its dpms function, which should power it off.
240 void drm_helper_disable_unused_functions(struct drm_device *dev)
242 struct drm_encoder *encoder;
243 struct drm_connector *connector;
244 struct drm_crtc *crtc;
246 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
247 if (!connector->encoder)
249 if (connector->status == connector_status_disconnected)
250 connector->encoder = NULL;
253 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
254 if (!drm_helper_encoder_in_use(encoder)) {
255 drm_encoder_disable(encoder);
256 /* disconnector encoder from any connector */
257 encoder->crtc = NULL;
261 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
262 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
263 crtc->enabled = drm_helper_crtc_in_use(crtc);
264 if (!crtc->enabled) {
265 if (crtc_funcs->disable)
266 (*crtc_funcs->disable)(crtc);
268 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
273 EXPORT_SYMBOL(drm_helper_disable_unused_functions);
276 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
277 * @encoder: encoder to test
278 * @crtc: crtc to test
280 * Return false if @encoder can't be driven by @crtc, true otherwise.
282 static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
283 struct drm_crtc *crtc)
285 struct drm_device *dev;
286 struct drm_crtc *tmp;
289 WARN(!crtc, "checking null crtc?\n");
293 list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
299 if (encoder->possible_crtcs & crtc_mask)
305 * Check the CRTC we're going to map each output to vs. its current
306 * CRTC. If they don't match, we have to disable the output and the CRTC
307 * since the driver will have to re-route things.
310 drm_crtc_prepare_encoders(struct drm_device *dev)
312 struct drm_encoder_helper_funcs *encoder_funcs;
313 struct drm_encoder *encoder;
315 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
316 encoder_funcs = encoder->helper_private;
317 /* Disable unused encoders */
318 if (encoder->crtc == NULL)
319 drm_encoder_disable(encoder);
320 /* Disable encoders whose CRTC is about to change */
321 if (encoder_funcs->get_crtc &&
322 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
323 drm_encoder_disable(encoder);
328 * drm_crtc_set_mode - set a mode
329 * @crtc: CRTC to program
335 * Caller must hold mode config lock.
337 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
338 * to fixup or reject the mode prior to trying to set it.
341 * True if the mode was set successfully, or false otherwise.
343 bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
344 struct drm_display_mode *mode,
346 struct drm_framebuffer *old_fb)
348 struct drm_device *dev = crtc->dev;
349 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
350 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
351 struct drm_encoder_helper_funcs *encoder_funcs;
352 int saved_x, saved_y;
353 struct drm_encoder *encoder;
356 crtc->enabled = drm_helper_crtc_in_use(crtc);
360 adjusted_mode = drm_mode_duplicate(dev, mode);
364 saved_hwmode = crtc->hwmode;
365 saved_mode = crtc->mode;
369 /* Update crtc values up front so the driver can rely on them for mode
376 /* Pass our mode to the connectors and the CRTC to give them a chance to
377 * adjust it according to limitations or connector properties, and also
378 * a chance to reject the mode entirely.
380 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
382 if (encoder->crtc != crtc)
384 encoder_funcs = encoder->helper_private;
385 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
387 DRM_DEBUG_KMS("Encoder fixup failed\n");
392 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
393 DRM_DEBUG_KMS("CRTC fixup failed\n");
396 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
398 /* Prepare the encoders and CRTCs before setting the mode. */
399 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
401 if (encoder->crtc != crtc)
403 encoder_funcs = encoder->helper_private;
404 /* Disable the encoders as the first thing we do. */
405 encoder_funcs->prepare(encoder);
408 drm_crtc_prepare_encoders(dev);
410 crtc_funcs->prepare(crtc);
412 /* Set up the DPLL and any encoders state that needs to adjust or depend
415 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
419 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
421 if (encoder->crtc != crtc)
424 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
425 encoder->base.id, drm_get_encoder_name(encoder),
426 mode->base.id, mode->name);
427 encoder_funcs = encoder->helper_private;
428 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
431 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
432 crtc_funcs->commit(crtc);
434 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
436 if (encoder->crtc != crtc)
439 encoder_funcs = encoder->helper_private;
440 encoder_funcs->commit(encoder);
444 /* Store real post-adjustment hardware mode. */
445 crtc->hwmode = *adjusted_mode;
447 /* Calculate and store various constants which
448 * are later needed by vblank and swap-completion
449 * timestamping. They are derived from true hwmode.
451 drm_calc_timestamping_constants(crtc);
453 /* FIXME: add subpixel order */
455 drm_mode_destroy(dev, adjusted_mode);
457 crtc->hwmode = saved_hwmode;
458 crtc->mode = saved_mode;
465 EXPORT_SYMBOL(drm_crtc_helper_set_mode);
469 drm_crtc_helper_disable(struct drm_crtc *crtc)
471 struct drm_device *dev = crtc->dev;
472 struct drm_connector *connector;
473 struct drm_encoder *encoder;
475 /* Decouple all encoders and their attached connectors from this crtc */
476 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
477 if (encoder->crtc != crtc)
480 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
481 if (connector->encoder != encoder)
484 connector->encoder = NULL;
488 drm_helper_disable_unused_functions(dev);
493 * drm_crtc_helper_set_config - set a new config from userspace
494 * @crtc: CRTC to setup
495 * @crtc_info: user provided configuration
496 * @new_mode: new mode to set
497 * @connector_set: set of connectors for the new config
498 * @fb: new framebuffer
501 * Caller must hold mode config lock.
503 * Setup a new configuration, provided by the user in @crtc_info, and enable
509 int drm_crtc_helper_set_config(struct drm_mode_set *set)
511 struct drm_device *dev;
512 struct drm_crtc *save_crtcs, *new_crtc, *crtc;
513 struct drm_encoder *save_encoders, *new_encoder, *encoder;
514 struct drm_framebuffer *old_fb = NULL;
515 bool mode_changed = false; /* if true do a full mode set */
516 bool fb_changed = false; /* if true and !mode_changed just do a flip */
517 struct drm_connector *save_connectors, *connector;
518 int count = 0, ro, fail = 0;
519 struct drm_crtc_helper_funcs *crtc_funcs;
520 struct drm_mode_set save_set;
532 if (!set->crtc->helper_private)
535 crtc_funcs = set->crtc->helper_private;
541 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
542 set->crtc->base.id, set->fb->base.id,
543 (int)set->num_connectors, set->x, set->y);
545 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
546 return drm_crtc_helper_disable(set->crtc);
549 dev = set->crtc->dev;
551 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
553 save_crtcs = kzalloc(dev->mode_config.num_crtc *
554 sizeof(struct drm_crtc), GFP_KERNEL);
558 save_encoders = kzalloc(dev->mode_config.num_encoder *
559 sizeof(struct drm_encoder), GFP_KERNEL);
560 if (!save_encoders) {
565 save_connectors = kzalloc(dev->mode_config.num_connector *
566 sizeof(struct drm_connector), GFP_KERNEL);
567 if (!save_connectors) {
569 kfree(save_encoders);
573 /* Copy data. Note that driver private data is not affected.
574 * Should anything bad happen only the expected state is
575 * restored, not the drivers personal bookkeeping.
578 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
579 save_crtcs[count++] = *crtc;
583 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
584 save_encoders[count++] = *encoder;
588 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
589 save_connectors[count++] = *connector;
592 save_set.crtc = set->crtc;
593 save_set.mode = &set->crtc->mode;
594 save_set.x = set->crtc->x;
595 save_set.y = set->crtc->y;
596 save_set.fb = set->crtc->fb;
598 /* We should be able to check here if the fb has the same properties
599 * and then just flip_or_move it */
600 if (set->crtc->fb != set->fb) {
601 /* If we have no fb then treat it as a full mode set */
602 if (set->crtc->fb == NULL) {
603 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
605 } else if (set->fb == NULL) {
607 } else if (set->fb->depth != set->crtc->fb->depth) {
609 } else if (set->fb->bits_per_pixel !=
610 set->crtc->fb->bits_per_pixel) {
616 if (set->x != set->crtc->x || set->y != set->crtc->y)
619 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
620 DRM_DEBUG_KMS("modes are different, full mode set\n");
621 drm_mode_debug_printmodeline(&set->crtc->mode);
622 drm_mode_debug_printmodeline(set->mode);
626 /* a) traverse passed in connector list and get encoders for them */
628 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
629 struct drm_connector_helper_funcs *connector_funcs =
630 connector->helper_private;
631 new_encoder = connector->encoder;
632 for (ro = 0; ro < set->num_connectors; ro++) {
633 if (set->connectors[ro] == connector) {
634 new_encoder = connector_funcs->best_encoder(connector);
635 /* if we can't get an encoder for a connector
636 we are setting now - then fail */
637 if (new_encoder == NULL)
638 /* don't break so fail path works correct */
644 if (new_encoder != connector->encoder) {
645 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
647 /* If the encoder is reused for another connector, then
648 * the appropriate crtc will be set later.
650 if (connector->encoder)
651 connector->encoder->crtc = NULL;
652 connector->encoder = new_encoder;
662 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
663 if (!connector->encoder)
666 if (connector->encoder->crtc == set->crtc)
669 new_crtc = connector->encoder->crtc;
671 for (ro = 0; ro < set->num_connectors; ro++) {
672 if (set->connectors[ro] == connector)
673 new_crtc = set->crtc;
676 /* Make sure the new CRTC will work with the encoder */
678 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
682 if (new_crtc != connector->encoder->crtc) {
683 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
685 connector->encoder->crtc = new_crtc;
688 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
689 connector->base.id, drm_get_connector_name(connector),
692 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
693 connector->base.id, drm_get_connector_name(connector));
697 /* mode_set_base is not a required function */
698 if (fb_changed && !crtc_funcs->mode_set_base)
702 set->crtc->enabled = drm_helper_crtc_in_use(set->crtc);
703 if (set->crtc->enabled) {
704 DRM_DEBUG_KMS("attempting to set mode from"
706 drm_mode_debug_printmodeline(set->mode);
707 old_fb = set->crtc->fb;
708 set->crtc->fb = set->fb;
709 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
712 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
714 set->crtc->fb = old_fb;
718 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
719 for (i = 0; i < set->num_connectors; i++) {
720 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
721 drm_get_connector_name(set->connectors[i]));
722 set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
725 drm_helper_disable_unused_functions(dev);
726 } else if (fb_changed) {
727 set->crtc->x = set->x;
728 set->crtc->y = set->y;
730 old_fb = set->crtc->fb;
731 if (set->crtc->fb != set->fb)
732 set->crtc->fb = set->fb;
733 ret = crtc_funcs->mode_set_base(set->crtc,
734 set->x, set->y, old_fb);
736 set->crtc->fb = old_fb;
741 kfree(save_connectors);
742 kfree(save_encoders);
747 /* Restore all previous data. */
749 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
750 *crtc = save_crtcs[count++];
754 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
755 *encoder = save_encoders[count++];
759 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
760 *connector = save_connectors[count++];
763 /* Try to restore the config */
765 !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
766 save_set.y, save_set.fb))
767 DRM_ERROR("failed to restore config after modeset failure\n");
769 kfree(save_connectors);
770 kfree(save_encoders);
774 EXPORT_SYMBOL(drm_crtc_helper_set_config);
776 static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
778 int dpms = DRM_MODE_DPMS_OFF;
779 struct drm_connector *connector;
780 struct drm_device *dev = encoder->dev;
782 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
783 if (connector->encoder == encoder)
784 if (connector->dpms < dpms)
785 dpms = connector->dpms;
789 static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
791 int dpms = DRM_MODE_DPMS_OFF;
792 struct drm_connector *connector;
793 struct drm_device *dev = crtc->dev;
795 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
796 if (connector->encoder && connector->encoder->crtc == crtc)
797 if (connector->dpms < dpms)
798 dpms = connector->dpms;
803 * drm_helper_connector_dpms
804 * @connector affected connector
807 * Calls the low-level connector DPMS function, then
808 * calls appropriate encoder and crtc DPMS functions as well
810 void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
812 struct drm_encoder *encoder = connector->encoder;
813 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
816 if (mode == connector->dpms)
819 old_dpms = connector->dpms;
820 connector->dpms = mode;
822 /* from off to on, do crtc then encoder */
823 if (mode < old_dpms) {
825 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
826 if (crtc_funcs->dpms)
827 (*crtc_funcs->dpms) (crtc,
828 drm_helper_choose_crtc_dpms(crtc));
831 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
832 if (encoder_funcs->dpms)
833 (*encoder_funcs->dpms) (encoder,
834 drm_helper_choose_encoder_dpms(encoder));
838 /* from on to off, do encoder then crtc */
839 if (mode > old_dpms) {
841 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
842 if (encoder_funcs->dpms)
843 (*encoder_funcs->dpms) (encoder,
844 drm_helper_choose_encoder_dpms(encoder));
847 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
848 if (crtc_funcs->dpms)
849 (*crtc_funcs->dpms) (crtc,
850 drm_helper_choose_crtc_dpms(crtc));
856 EXPORT_SYMBOL(drm_helper_connector_dpms);
858 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
859 struct drm_mode_fb_cmd2 *mode_cmd)
863 fb->width = mode_cmd->width;
864 fb->height = mode_cmd->height;
865 for (i = 0; i < 4; i++) {
866 fb->pitches[i] = mode_cmd->pitches[i];
867 fb->offsets[i] = mode_cmd->offsets[i];
869 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth,
870 &fb->bits_per_pixel);
871 fb->pixel_format = mode_cmd->pixel_format;
875 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
877 int drm_helper_resume_force_mode(struct drm_device *dev)
879 struct drm_crtc *crtc;
880 struct drm_encoder *encoder;
881 struct drm_encoder_helper_funcs *encoder_funcs;
882 struct drm_crtc_helper_funcs *crtc_funcs;
885 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
890 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
891 crtc->x, crtc->y, crtc->fb);
894 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
896 /* Turn off outputs that were already powered off */
897 if (drm_helper_choose_crtc_dpms(crtc)) {
898 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
900 if(encoder->crtc != crtc)
903 encoder_funcs = encoder->helper_private;
904 if (encoder_funcs->dpms)
905 (*encoder_funcs->dpms) (encoder,
906 drm_helper_choose_encoder_dpms(encoder));
909 crtc_funcs = crtc->helper_private;
910 if (crtc_funcs->dpms)
911 (*crtc_funcs->dpms) (crtc,
912 drm_helper_choose_crtc_dpms(crtc));
915 /* disable the unused connectors while restoring the modesetting */
916 drm_helper_disable_unused_functions(dev);
919 EXPORT_SYMBOL(drm_helper_resume_force_mode);
921 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
922 static void output_poll_execute(struct work_struct *work)
924 struct delayed_work *delayed_work = to_delayed_work(work);
925 struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
926 struct drm_connector *connector;
927 enum drm_connector_status old_status;
928 bool repoll = false, changed = false;
930 if (!drm_kms_helper_poll)
933 mutex_lock(&dev->mode_config.mutex);
934 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
936 /* if this is HPD or polled don't check it -
937 TV out for instance */
938 if (!connector->polled)
941 else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT))
944 old_status = connector->status;
945 /* if we are connected and don't want to poll for disconnect
947 if (old_status == connector_status_connected &&
948 !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) &&
949 !(connector->polled & DRM_CONNECTOR_POLL_HPD))
952 connector->status = connector->funcs->detect(connector, false);
953 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
955 drm_get_connector_name(connector),
956 old_status, connector->status);
957 if (old_status != connector->status)
961 mutex_unlock(&dev->mode_config.mutex);
964 /* send a uevent + call fbdev */
965 drm_sysfs_hotplug_event(dev);
966 if (dev->mode_config.funcs->output_poll_changed)
967 dev->mode_config.funcs->output_poll_changed(dev);
971 queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD);
974 void drm_kms_helper_poll_disable(struct drm_device *dev)
976 if (!dev->mode_config.poll_enabled)
978 cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
980 EXPORT_SYMBOL(drm_kms_helper_poll_disable);
982 void drm_kms_helper_poll_enable(struct drm_device *dev)
985 struct drm_connector *connector;
987 if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
990 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
991 if (connector->polled)
996 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
998 EXPORT_SYMBOL(drm_kms_helper_poll_enable);
1000 void drm_kms_helper_poll_init(struct drm_device *dev)
1002 INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
1003 dev->mode_config.poll_enabled = true;
1005 drm_kms_helper_poll_enable(dev);
1007 EXPORT_SYMBOL(drm_kms_helper_poll_init);
1009 void drm_kms_helper_poll_fini(struct drm_device *dev)
1011 drm_kms_helper_poll_disable(dev);
1013 EXPORT_SYMBOL(drm_kms_helper_poll_fini);
1015 void drm_helper_hpd_irq_event(struct drm_device *dev)
1017 if (!dev->mode_config.poll_enabled)
1020 /* kill timer and schedule immediate execution, this doesn't block */
1021 cancel_delayed_work(&dev->mode_config.output_poll_work);
1022 if (drm_kms_helper_poll)
1023 queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
1025 EXPORT_SYMBOL(drm_helper_hpd_irq_event);
1029 * drm_format_num_planes - get the number of planes for format
1030 * @format: pixel format (DRM_FORMAT_*)
1033 * The number of planes used by the specified pixel format.
1035 int drm_format_num_planes(uint32_t format)
1038 case DRM_FORMAT_YUV410:
1039 case DRM_FORMAT_YVU410:
1040 case DRM_FORMAT_YUV411:
1041 case DRM_FORMAT_YVU411:
1042 case DRM_FORMAT_YUV420:
1043 case DRM_FORMAT_YVU420:
1044 case DRM_FORMAT_YUV422:
1045 case DRM_FORMAT_YVU422:
1046 case DRM_FORMAT_YUV444:
1047 case DRM_FORMAT_YVU444:
1049 case DRM_FORMAT_NV12:
1050 case DRM_FORMAT_NV21:
1051 case DRM_FORMAT_NV16:
1052 case DRM_FORMAT_NV61:
1058 EXPORT_SYMBOL(drm_format_num_planes);