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
);
107 drm_helper_hpd_irq_event(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
);
119 count
= drm_add_modes_noedid(connector
, 1024, 768);
124 drm_mode_connector_list_update(connector
);
127 drm_mode_validate_size(dev
, &connector
->modes
, maxX
,
130 if (connector
->interlace_allowed
)
131 mode_flags
|= DRM_MODE_FLAG_INTERLACE
;
132 if (connector
->doublescan_allowed
)
133 mode_flags
|= DRM_MODE_FLAG_DBLSCAN
;
134 drm_mode_validate_flag(connector
, mode_flags
);
136 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
137 if (mode
->status
== MODE_OK
)
138 mode
->status
= connector_funcs
->mode_valid(connector
,
143 drm_mode_prune_invalid(dev
, &connector
->modes
, true);
145 if (list_empty(&connector
->modes
))
148 drm_mode_sort(&connector
->modes
);
150 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector
->base
.id
,
151 drm_get_connector_name(connector
));
152 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
153 mode
->vrefresh
= drm_mode_vrefresh(mode
);
155 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
156 drm_mode_debug_printmodeline(mode
);
161 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes
);
164 * drm_helper_encoder_in_use - check if a given encoder is in use
165 * @encoder: encoder to check
168 * Caller must hold mode config lock.
170 * Walk @encoders's DRM device's mode_config and see if it's in use.
173 * True if @encoder is part of the mode_config, false otherwise.
175 bool drm_helper_encoder_in_use(struct drm_encoder
*encoder
)
177 struct drm_connector
*connector
;
178 struct drm_device
*dev
= encoder
->dev
;
179 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
180 if (connector
->encoder
== encoder
)
184 EXPORT_SYMBOL(drm_helper_encoder_in_use
);
187 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
188 * @crtc: CRTC to check
191 * Caller must hold mode config lock.
193 * Walk @crtc's DRM device's mode_config and see if it's in use.
196 * True if @crtc is part of the mode_config, false otherwise.
198 bool drm_helper_crtc_in_use(struct drm_crtc
*crtc
)
200 struct drm_encoder
*encoder
;
201 struct drm_device
*dev
= crtc
->dev
;
202 /* FIXME: Locking around list access? */
203 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
)
204 if (encoder
->crtc
== crtc
&& drm_helper_encoder_in_use(encoder
))
208 EXPORT_SYMBOL(drm_helper_crtc_in_use
);
211 drm_encoder_disable(struct drm_encoder
*encoder
)
213 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
215 if (encoder_funcs
->disable
)
216 (*encoder_funcs
->disable
)(encoder
);
218 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
222 * drm_helper_disable_unused_functions - disable unused objects
226 * Caller must hold mode config lock.
228 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
229 * by calling its dpms function, which should power it off.
231 void drm_helper_disable_unused_functions(struct drm_device
*dev
)
233 struct drm_encoder
*encoder
;
234 struct drm_connector
*connector
;
235 struct drm_crtc
*crtc
;
237 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
238 if (!connector
->encoder
)
240 if (connector
->status
== connector_status_disconnected
)
241 connector
->encoder
= NULL
;
244 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
245 if (!drm_helper_encoder_in_use(encoder
)) {
246 drm_encoder_disable(encoder
);
247 /* disconnector encoder from any connector */
248 encoder
->crtc
= NULL
;
252 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
253 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
254 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
255 if (!crtc
->enabled
) {
256 if (crtc_funcs
->disable
)
257 (*crtc_funcs
->disable
)(crtc
);
259 (*crtc_funcs
->dpms
)(crtc
, DRM_MODE_DPMS_OFF
);
264 EXPORT_SYMBOL(drm_helper_disable_unused_functions
);
267 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
268 * @encoder: encoder to test
269 * @crtc: crtc to test
271 * Return false if @encoder can't be driven by @crtc, true otherwise.
273 static bool drm_encoder_crtc_ok(struct drm_encoder
*encoder
,
274 struct drm_crtc
*crtc
)
276 struct drm_device
*dev
;
277 struct drm_crtc
*tmp
;
280 WARN(!crtc
, "checking null crtc?");
284 list_for_each_entry(tmp
, &dev
->mode_config
.crtc_list
, head
) {
290 if (encoder
->possible_crtcs
& crtc_mask
)
296 * Check the CRTC we're going to map each output to vs. its current
297 * CRTC. If they don't match, we have to disable the output and the CRTC
298 * since the driver will have to re-route things.
301 drm_crtc_prepare_encoders(struct drm_device
*dev
)
303 struct drm_encoder_helper_funcs
*encoder_funcs
;
304 struct drm_encoder
*encoder
;
306 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
307 encoder_funcs
= encoder
->helper_private
;
308 /* Disable unused encoders */
309 if (encoder
->crtc
== NULL
)
310 drm_encoder_disable(encoder
);
311 /* Disable encoders whose CRTC is about to change */
312 if (encoder_funcs
->get_crtc
&&
313 encoder
->crtc
!= (*encoder_funcs
->get_crtc
)(encoder
))
314 drm_encoder_disable(encoder
);
319 * drm_crtc_set_mode - set a mode
320 * @crtc: CRTC to program
326 * Caller must hold mode config lock.
328 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
329 * to fixup or reject the mode prior to trying to set it.
332 * True if the mode was set successfully, or false otherwise.
334 bool drm_crtc_helper_set_mode(struct drm_crtc
*crtc
,
335 struct drm_display_mode
*mode
,
337 struct drm_framebuffer
*old_fb
)
339 struct drm_device
*dev
= crtc
->dev
;
340 struct drm_display_mode
*adjusted_mode
, saved_mode
;
341 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
342 struct drm_encoder_helper_funcs
*encoder_funcs
;
343 int saved_x
, saved_y
;
344 struct drm_encoder
*encoder
;
347 adjusted_mode
= drm_mode_duplicate(dev
, mode
);
349 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
354 saved_mode
= crtc
->mode
;
358 /* Update crtc values up front so the driver can rely on them for mode
365 /* Pass our mode to the connectors and the CRTC to give them a chance to
366 * adjust it according to limitations or connector properties, and also
367 * a chance to reject the mode entirely.
369 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
371 if (encoder
->crtc
!= crtc
)
373 encoder_funcs
= encoder
->helper_private
;
374 if (!(ret
= encoder_funcs
->mode_fixup(encoder
, mode
,
380 if (!(ret
= crtc_funcs
->mode_fixup(crtc
, mode
, adjusted_mode
))) {
383 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc
->base
.id
);
385 /* Prepare the encoders and CRTCs before setting the mode. */
386 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
388 if (encoder
->crtc
!= crtc
)
390 encoder_funcs
= encoder
->helper_private
;
391 /* Disable the encoders as the first thing we do. */
392 encoder_funcs
->prepare(encoder
);
395 drm_crtc_prepare_encoders(dev
);
397 crtc_funcs
->prepare(crtc
);
399 /* Set up the DPLL and any encoders state that needs to adjust or depend
402 ret
= !crtc_funcs
->mode_set(crtc
, mode
, adjusted_mode
, x
, y
, old_fb
);
406 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
408 if (encoder
->crtc
!= crtc
)
411 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
412 encoder
->base
.id
, drm_get_encoder_name(encoder
),
413 mode
->base
.id
, mode
->name
);
414 encoder_funcs
= encoder
->helper_private
;
415 encoder_funcs
->mode_set(encoder
, mode
, adjusted_mode
);
418 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
419 crtc_funcs
->commit(crtc
);
421 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
423 if (encoder
->crtc
!= crtc
)
426 encoder_funcs
= encoder
->helper_private
;
427 encoder_funcs
->commit(encoder
);
431 /* XXX free adjustedmode */
432 drm_mode_destroy(dev
, adjusted_mode
);
433 /* FIXME: add subpixel order */
436 crtc
->mode
= saved_mode
;
443 EXPORT_SYMBOL(drm_crtc_helper_set_mode
);
447 * drm_crtc_helper_set_config - set a new config from userspace
448 * @crtc: CRTC to setup
449 * @crtc_info: user provided configuration
450 * @new_mode: new mode to set
451 * @connector_set: set of connectors for the new config
452 * @fb: new framebuffer
455 * Caller must hold mode config lock.
457 * Setup a new configuration, provided by the user in @crtc_info, and enable
463 int drm_crtc_helper_set_config(struct drm_mode_set
*set
)
465 struct drm_device
*dev
;
466 struct drm_crtc
*save_crtcs
, *new_crtc
, *crtc
;
467 struct drm_encoder
*save_encoders
, *new_encoder
, *encoder
;
468 struct drm_framebuffer
*old_fb
= NULL
;
469 bool mode_changed
= false; /* if true do a full mode set */
470 bool fb_changed
= false; /* if true and !mode_changed just do a flip */
471 struct drm_connector
*save_connectors
, *connector
;
472 int count
= 0, ro
, fail
= 0;
473 struct drm_crtc_helper_funcs
*crtc_funcs
;
484 if (!set
->crtc
->helper_private
)
487 crtc_funcs
= set
->crtc
->helper_private
;
490 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
491 set
->crtc
->base
.id
, set
->fb
->base
.id
,
492 (int)set
->num_connectors
, set
->x
, set
->y
);
494 DRM_DEBUG_KMS("[CRTC:%d] [NOFB] #connectors=%d (x y) (%i %i)\n",
495 set
->crtc
->base
.id
, (int)set
->num_connectors
,
499 dev
= set
->crtc
->dev
;
501 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
503 save_crtcs
= kzalloc(dev
->mode_config
.num_crtc
*
504 sizeof(struct drm_crtc
), GFP_KERNEL
);
508 save_encoders
= kzalloc(dev
->mode_config
.num_encoder
*
509 sizeof(struct drm_encoder
), GFP_KERNEL
);
510 if (!save_encoders
) {
515 save_connectors
= kzalloc(dev
->mode_config
.num_connector
*
516 sizeof(struct drm_connector
), GFP_KERNEL
);
517 if (!save_connectors
) {
519 kfree(save_encoders
);
523 /* Copy data. Note that driver private data is not affected.
524 * Should anything bad happen only the expected state is
525 * restored, not the drivers personal bookkeeping.
528 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
529 save_crtcs
[count
++] = *crtc
;
533 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
534 save_encoders
[count
++] = *encoder
;
538 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
539 save_connectors
[count
++] = *connector
;
542 /* We should be able to check here if the fb has the same properties
543 * and then just flip_or_move it */
544 if (set
->crtc
->fb
!= set
->fb
) {
545 /* If we have no fb then treat it as a full mode set */
546 if (set
->crtc
->fb
== NULL
) {
547 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
549 } else if (set
->fb
== NULL
) {
555 if (set
->x
!= set
->crtc
->x
|| set
->y
!= set
->crtc
->y
)
558 if (set
->mode
&& !drm_mode_equal(set
->mode
, &set
->crtc
->mode
)) {
559 DRM_DEBUG_KMS("modes are different, full mode set\n");
560 drm_mode_debug_printmodeline(&set
->crtc
->mode
);
561 drm_mode_debug_printmodeline(set
->mode
);
565 /* a) traverse passed in connector list and get encoders for them */
567 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
568 struct drm_connector_helper_funcs
*connector_funcs
=
569 connector
->helper_private
;
570 new_encoder
= connector
->encoder
;
571 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
572 if (set
->connectors
[ro
] == connector
) {
573 new_encoder
= connector_funcs
->best_encoder(connector
);
574 /* if we can't get an encoder for a connector
575 we are setting now - then fail */
576 if (new_encoder
== NULL
)
577 /* don't break so fail path works correct */
583 if (new_encoder
!= connector
->encoder
) {
584 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
586 /* If the encoder is reused for another connector, then
587 * the appropriate crtc will be set later.
589 if (connector
->encoder
)
590 connector
->encoder
->crtc
= NULL
;
591 connector
->encoder
= new_encoder
;
601 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
602 if (!connector
->encoder
)
605 if (connector
->encoder
->crtc
== set
->crtc
)
608 new_crtc
= connector
->encoder
->crtc
;
610 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
611 if (set
->connectors
[ro
] == connector
)
612 new_crtc
= set
->crtc
;
615 /* Make sure the new CRTC will work with the encoder */
617 !drm_encoder_crtc_ok(connector
->encoder
, new_crtc
)) {
621 if (new_crtc
!= connector
->encoder
->crtc
) {
622 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
624 connector
->encoder
->crtc
= new_crtc
;
627 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
628 connector
->base
.id
, drm_get_connector_name(connector
),
631 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
632 connector
->base
.id
, drm_get_connector_name(connector
));
636 /* mode_set_base is not a required function */
637 if (fb_changed
&& !crtc_funcs
->mode_set_base
)
641 old_fb
= set
->crtc
->fb
;
642 set
->crtc
->fb
= set
->fb
;
643 set
->crtc
->enabled
= (set
->mode
!= NULL
);
644 if (set
->mode
!= NULL
) {
645 DRM_DEBUG_KMS("attempting to set mode from"
647 drm_mode_debug_printmodeline(set
->mode
);
648 if (!drm_crtc_helper_set_mode(set
->crtc
, set
->mode
,
651 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
657 drm_helper_disable_unused_functions(dev
);
658 } else if (fb_changed
) {
659 set
->crtc
->x
= set
->x
;
660 set
->crtc
->y
= set
->y
;
662 old_fb
= set
->crtc
->fb
;
663 if (set
->crtc
->fb
!= set
->fb
)
664 set
->crtc
->fb
= set
->fb
;
665 ret
= crtc_funcs
->mode_set_base(set
->crtc
,
666 set
->x
, set
->y
, old_fb
);
671 kfree(save_connectors
);
672 kfree(save_encoders
);
677 /* Restore all previous data. */
679 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
680 *crtc
= save_crtcs
[count
++];
684 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
685 *encoder
= save_encoders
[count
++];
689 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
690 *connector
= save_connectors
[count
++];
693 kfree(save_connectors
);
694 kfree(save_encoders
);
698 EXPORT_SYMBOL(drm_crtc_helper_set_config
);
700 static int drm_helper_choose_encoder_dpms(struct drm_encoder
*encoder
)
702 int dpms
= DRM_MODE_DPMS_OFF
;
703 struct drm_connector
*connector
;
704 struct drm_device
*dev
= encoder
->dev
;
706 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
707 if (connector
->encoder
== encoder
)
708 if (connector
->dpms
< dpms
)
709 dpms
= connector
->dpms
;
713 static int drm_helper_choose_crtc_dpms(struct drm_crtc
*crtc
)
715 int dpms
= DRM_MODE_DPMS_OFF
;
716 struct drm_connector
*connector
;
717 struct drm_device
*dev
= crtc
->dev
;
719 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
720 if (connector
->encoder
&& connector
->encoder
->crtc
== crtc
)
721 if (connector
->dpms
< dpms
)
722 dpms
= connector
->dpms
;
727 * drm_helper_connector_dpms
728 * @connector affected connector
731 * Calls the low-level connector DPMS function, then
732 * calls appropriate encoder and crtc DPMS functions as well
734 void drm_helper_connector_dpms(struct drm_connector
*connector
, int mode
)
736 struct drm_encoder
*encoder
= connector
->encoder
;
737 struct drm_crtc
*crtc
= encoder
? encoder
->crtc
: NULL
;
740 if (mode
== connector
->dpms
)
743 old_dpms
= connector
->dpms
;
744 connector
->dpms
= mode
;
746 /* from off to on, do crtc then encoder */
747 if (mode
< old_dpms
) {
749 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
750 if (crtc_funcs
->dpms
)
751 (*crtc_funcs
->dpms
) (crtc
,
752 drm_helper_choose_crtc_dpms(crtc
));
755 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
756 if (encoder_funcs
->dpms
)
757 (*encoder_funcs
->dpms
) (encoder
,
758 drm_helper_choose_encoder_dpms(encoder
));
762 /* from on to off, do encoder then crtc */
763 if (mode
> old_dpms
) {
765 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
766 if (encoder_funcs
->dpms
)
767 (*encoder_funcs
->dpms
) (encoder
,
768 drm_helper_choose_encoder_dpms(encoder
));
771 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
772 if (crtc_funcs
->dpms
)
773 (*crtc_funcs
->dpms
) (crtc
,
774 drm_helper_choose_crtc_dpms(crtc
));
780 EXPORT_SYMBOL(drm_helper_connector_dpms
);
782 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer
*fb
,
783 struct drm_mode_fb_cmd
*mode_cmd
)
785 fb
->width
= mode_cmd
->width
;
786 fb
->height
= mode_cmd
->height
;
787 fb
->pitch
= mode_cmd
->pitch
;
788 fb
->bits_per_pixel
= mode_cmd
->bpp
;
789 fb
->depth
= mode_cmd
->depth
;
793 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct
);
795 int drm_helper_resume_force_mode(struct drm_device
*dev
)
797 struct drm_crtc
*crtc
;
798 struct drm_encoder
*encoder
;
799 struct drm_encoder_helper_funcs
*encoder_funcs
;
800 struct drm_crtc_helper_funcs
*crtc_funcs
;
803 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
808 ret
= drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
809 crtc
->x
, crtc
->y
, crtc
->fb
);
812 DRM_ERROR("failed to set mode on crtc %p\n", crtc
);
814 /* Turn off outputs that were already powered off */
815 if (drm_helper_choose_crtc_dpms(crtc
)) {
816 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
818 if(encoder
->crtc
!= crtc
)
821 encoder_funcs
= encoder
->helper_private
;
822 if (encoder_funcs
->dpms
)
823 (*encoder_funcs
->dpms
) (encoder
,
824 drm_helper_choose_encoder_dpms(encoder
));
827 crtc_funcs
= crtc
->helper_private
;
828 if (crtc_funcs
->dpms
)
829 (*crtc_funcs
->dpms
) (crtc
,
830 drm_helper_choose_crtc_dpms(crtc
));
833 /* disable the unused connectors while restoring the modesetting */
834 drm_helper_disable_unused_functions(dev
);
837 EXPORT_SYMBOL(drm_helper_resume_force_mode
);
839 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
840 static void output_poll_execute(struct work_struct
*work
)
842 struct delayed_work
*delayed_work
= to_delayed_work(work
);
843 struct drm_device
*dev
= container_of(delayed_work
, struct drm_device
, mode_config
.output_poll_work
);
844 struct drm_connector
*connector
;
845 enum drm_connector_status old_status
, status
;
846 bool repoll
= false, changed
= false;
848 if (!drm_kms_helper_poll
)
851 mutex_lock(&dev
->mode_config
.mutex
);
852 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
854 /* if this is HPD or polled don't check it -
855 TV out for instance */
856 if (!connector
->polled
)
859 else if (connector
->polled
& (DRM_CONNECTOR_POLL_CONNECT
| DRM_CONNECTOR_POLL_DISCONNECT
))
862 old_status
= connector
->status
;
863 /* if we are connected and don't want to poll for disconnect
865 if (old_status
== connector_status_connected
&&
866 !(connector
->polled
& DRM_CONNECTOR_POLL_DISCONNECT
) &&
867 !(connector
->polled
& DRM_CONNECTOR_POLL_HPD
))
870 status
= connector
->funcs
->detect(connector
);
871 if (old_status
!= status
)
875 mutex_unlock(&dev
->mode_config
.mutex
);
878 /* send a uevent + call fbdev */
879 drm_sysfs_hotplug_event(dev
);
880 if (dev
->mode_config
.funcs
->output_poll_changed
)
881 dev
->mode_config
.funcs
->output_poll_changed(dev
);
885 queue_delayed_work(system_nrt_wq
, delayed_work
, DRM_OUTPUT_POLL_PERIOD
);
888 void drm_kms_helper_poll_disable(struct drm_device
*dev
)
890 if (!dev
->mode_config
.poll_enabled
)
892 cancel_delayed_work_sync(&dev
->mode_config
.output_poll_work
);
894 EXPORT_SYMBOL(drm_kms_helper_poll_disable
);
896 void drm_kms_helper_poll_enable(struct drm_device
*dev
)
899 struct drm_connector
*connector
;
901 if (!dev
->mode_config
.poll_enabled
|| !drm_kms_helper_poll
)
904 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
905 if (connector
->polled
)
910 queue_delayed_work(system_nrt_wq
, &dev
->mode_config
.output_poll_work
, DRM_OUTPUT_POLL_PERIOD
);
912 EXPORT_SYMBOL(drm_kms_helper_poll_enable
);
914 void drm_kms_helper_poll_init(struct drm_device
*dev
)
916 INIT_DELAYED_WORK(&dev
->mode_config
.output_poll_work
, output_poll_execute
);
917 dev
->mode_config
.poll_enabled
= true;
919 drm_kms_helper_poll_enable(dev
);
921 EXPORT_SYMBOL(drm_kms_helper_poll_init
);
923 void drm_kms_helper_poll_fini(struct drm_device
*dev
)
925 drm_kms_helper_poll_disable(dev
);
927 EXPORT_SYMBOL(drm_kms_helper_poll_fini
);
929 void drm_helper_hpd_irq_event(struct drm_device
*dev
)
931 if (!dev
->mode_config
.poll_enabled
)
934 /* kill timer and schedule immediate execution, this doesn't block */
935 cancel_delayed_work(&dev
->mode_config
.output_poll_work
);
936 if (drm_kms_helper_poll
)
937 queue_delayed_work(system_nrt_wq
, &dev
->mode_config
.output_poll_work
, 0);
939 EXPORT_SYMBOL(drm_helper_hpd_irq_event
);