2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
5 * DRM core CRTC related functions
7 * Permission to use, copy, modify, distribute, and sell this software and its
8 * documentation for any purpose is hereby granted without fee, provided that
9 * the above copyright notice appear in all copies and that both that copyright
10 * notice and this permission notice appear in supporting documentation, and
11 * that the name of the copyright holders not be used in advertising or
12 * publicity pertaining to distribution of the software without specific,
13 * written prior permission. The copyright holders make no representations
14 * about the suitability of this software for any purpose. It is provided "as
15 * is" without express or implied warranty.
17 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
19 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
22 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
27 * Eric Anholt <eric@anholt.net>
28 * Dave Airlie <airlied@linux.ie>
29 * Jesse Barnes <jesse.barnes@intel.com>
34 #include "drm_crtc_helper.h"
35 #include "drm_fb_helper.h"
37 static bool drm_kms_helper_poll
= true;
38 module_param_named(poll
, drm_kms_helper_poll
, bool, 0600);
40 static void drm_mode_validate_flag(struct drm_connector
*connector
,
43 struct drm_display_mode
*mode
, *t
;
45 if (flags
== (DRM_MODE_FLAG_DBLSCAN
| DRM_MODE_FLAG_INTERLACE
))
48 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
49 if ((mode
->flags
& DRM_MODE_FLAG_INTERLACE
) &&
50 !(flags
& DRM_MODE_FLAG_INTERLACE
))
51 mode
->status
= MODE_NO_INTERLACE
;
52 if ((mode
->flags
& DRM_MODE_FLAG_DBLSCAN
) &&
53 !(flags
& DRM_MODE_FLAG_DBLSCAN
))
54 mode
->status
= MODE_NO_DBLESCAN
;
61 * drm_helper_probe_single_connector_modes - get complete set of display modes
63 * @maxX: max width for modes
64 * @maxY: max height for modes
67 * Caller must hold mode config lock.
69 * Based on @dev's mode_config layout, scan all the connectors and try to detect
70 * modes on them. Modes will first be added to the connector's probed_modes
71 * list, then culled (based on validity and the @maxX, @maxY parameters) and
72 * put into the normal modes list.
74 * Intended to be used either at bootup time or when major configuration
75 * changes have occurred.
77 * FIXME: take into account monitor limits
80 * Number of modes found on @connector.
82 int drm_helper_probe_single_connector_modes(struct drm_connector
*connector
,
83 uint32_t maxX
, uint32_t maxY
)
85 struct drm_device
*dev
= connector
->dev
;
86 struct drm_display_mode
*mode
, *t
;
87 struct drm_connector_helper_funcs
*connector_funcs
=
88 connector
->helper_private
;
92 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector
->base
.id
,
93 drm_get_connector_name(connector
));
94 /* set all modes to the unverified state */
95 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
)
96 mode
->status
= MODE_UNVERIFIED
;
98 if (connector
->force
) {
99 if (connector
->force
== DRM_FORCE_ON
)
100 connector
->status
= connector_status_connected
;
102 connector
->status
= connector_status_disconnected
;
103 if (connector
->funcs
->force
)
104 connector
->funcs
->force(connector
);
106 connector
->status
= connector
->funcs
->detect(connector
, true);
107 drm_kms_helper_poll_enable(dev
);
110 if (connector
->status
== connector_status_disconnected
) {
111 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
112 connector
->base
.id
, drm_get_connector_name(connector
));
113 drm_mode_connector_update_edid_property(connector
, NULL
);
117 count
= (*connector_funcs
->get_modes
)(connector
);
118 if (count
== 0 && connector
->status
== connector_status_connected
)
119 count
= drm_add_modes_noedid(connector
, 1024, 768);
123 drm_mode_connector_list_update(connector
);
126 drm_mode_validate_size(dev
, &connector
->modes
, maxX
,
129 if (connector
->interlace_allowed
)
130 mode_flags
|= DRM_MODE_FLAG_INTERLACE
;
131 if (connector
->doublescan_allowed
)
132 mode_flags
|= DRM_MODE_FLAG_DBLSCAN
;
133 drm_mode_validate_flag(connector
, mode_flags
);
135 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
136 if (mode
->status
== MODE_OK
)
137 mode
->status
= connector_funcs
->mode_valid(connector
,
142 drm_mode_prune_invalid(dev
, &connector
->modes
, true);
144 if (list_empty(&connector
->modes
))
147 drm_mode_sort(&connector
->modes
);
149 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector
->base
.id
,
150 drm_get_connector_name(connector
));
151 list_for_each_entry_safe(mode
, t
, &connector
->modes
, head
) {
152 mode
->vrefresh
= drm_mode_vrefresh(mode
);
154 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
155 drm_mode_debug_printmodeline(mode
);
160 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes
);
163 * drm_helper_encoder_in_use - check if a given encoder is in use
164 * @encoder: encoder to check
167 * Caller must hold mode config lock.
169 * Walk @encoders's DRM device's mode_config and see if it's in use.
172 * True if @encoder is part of the mode_config, false otherwise.
174 bool drm_helper_encoder_in_use(struct drm_encoder
*encoder
)
176 struct drm_connector
*connector
;
177 struct drm_device
*dev
= encoder
->dev
;
178 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
179 if (connector
->encoder
== encoder
)
183 EXPORT_SYMBOL(drm_helper_encoder_in_use
);
186 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
187 * @crtc: CRTC to check
190 * Caller must hold mode config lock.
192 * Walk @crtc's DRM device's mode_config and see if it's in use.
195 * True if @crtc is part of the mode_config, false otherwise.
197 bool drm_helper_crtc_in_use(struct drm_crtc
*crtc
)
199 struct drm_encoder
*encoder
;
200 struct drm_device
*dev
= crtc
->dev
;
201 /* FIXME: Locking around list access? */
202 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
)
203 if (encoder
->crtc
== crtc
&& drm_helper_encoder_in_use(encoder
))
207 EXPORT_SYMBOL(drm_helper_crtc_in_use
);
210 drm_encoder_disable(struct drm_encoder
*encoder
)
212 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
214 if (encoder_funcs
->disable
)
215 (*encoder_funcs
->disable
)(encoder
);
217 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
221 * drm_helper_disable_unused_functions - disable unused objects
225 * Caller must hold mode config lock.
227 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
228 * by calling its dpms function, which should power it off.
230 void drm_helper_disable_unused_functions(struct drm_device
*dev
)
232 struct drm_encoder
*encoder
;
233 struct drm_connector
*connector
;
234 struct drm_crtc
*crtc
;
236 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
237 if (!connector
->encoder
)
239 if (connector
->status
== connector_status_disconnected
)
240 connector
->encoder
= NULL
;
243 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
244 if (!drm_helper_encoder_in_use(encoder
)) {
245 drm_encoder_disable(encoder
);
246 /* disconnector encoder from any connector */
247 encoder
->crtc
= NULL
;
251 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
252 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
253 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
254 if (!crtc
->enabled
) {
255 if (crtc_funcs
->disable
)
256 (*crtc_funcs
->disable
)(crtc
);
258 (*crtc_funcs
->dpms
)(crtc
, DRM_MODE_DPMS_OFF
);
263 EXPORT_SYMBOL(drm_helper_disable_unused_functions
);
266 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
267 * @encoder: encoder to test
268 * @crtc: crtc to test
270 * Return false if @encoder can't be driven by @crtc, true otherwise.
272 static bool drm_encoder_crtc_ok(struct drm_encoder
*encoder
,
273 struct drm_crtc
*crtc
)
275 struct drm_device
*dev
;
276 struct drm_crtc
*tmp
;
279 WARN(!crtc
, "checking null crtc?\n");
283 list_for_each_entry(tmp
, &dev
->mode_config
.crtc_list
, head
) {
289 if (encoder
->possible_crtcs
& crtc_mask
)
295 * Check the CRTC we're going to map each output to vs. its current
296 * CRTC. If they don't match, we have to disable the output and the CRTC
297 * since the driver will have to re-route things.
300 drm_crtc_prepare_encoders(struct drm_device
*dev
)
302 struct drm_encoder_helper_funcs
*encoder_funcs
;
303 struct drm_encoder
*encoder
;
305 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
306 encoder_funcs
= encoder
->helper_private
;
307 /* Disable unused encoders */
308 if (encoder
->crtc
== NULL
)
309 drm_encoder_disable(encoder
);
310 /* Disable encoders whose CRTC is about to change */
311 if (encoder_funcs
->get_crtc
&&
312 encoder
->crtc
!= (*encoder_funcs
->get_crtc
)(encoder
))
313 drm_encoder_disable(encoder
);
318 * drm_crtc_set_mode - set a mode
319 * @crtc: CRTC to program
325 * Caller must hold mode config lock.
327 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
328 * to fixup or reject the mode prior to trying to set it.
331 * True if the mode was set successfully, or false otherwise.
333 bool drm_crtc_helper_set_mode(struct drm_crtc
*crtc
,
334 struct drm_display_mode
*mode
,
336 struct drm_framebuffer
*old_fb
)
338 struct drm_device
*dev
= crtc
->dev
;
339 struct drm_display_mode
*adjusted_mode
, saved_mode
, saved_hwmode
;
340 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
341 struct drm_encoder_helper_funcs
*encoder_funcs
;
342 int saved_x
, saved_y
;
343 struct drm_encoder
*encoder
;
346 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
350 adjusted_mode
= drm_mode_duplicate(dev
, mode
);
352 saved_hwmode
= crtc
->hwmode
;
353 saved_mode
= crtc
->mode
;
357 /* Update crtc values up front so the driver can rely on them for mode
364 /* Pass our mode to the connectors and the CRTC to give them a chance to
365 * adjust it according to limitations or connector properties, and also
366 * a chance to reject the mode entirely.
368 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
370 if (encoder
->crtc
!= crtc
)
372 encoder_funcs
= encoder
->helper_private
;
373 if (!(ret
= encoder_funcs
->mode_fixup(encoder
, mode
,
375 DRM_DEBUG_KMS("Encoder fixup failed\n");
380 if (!(ret
= crtc_funcs
->mode_fixup(crtc
, mode
, adjusted_mode
))) {
381 DRM_DEBUG_KMS("CRTC fixup failed\n");
384 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc
->base
.id
);
386 /* Prepare the encoders and CRTCs before setting the mode. */
387 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
389 if (encoder
->crtc
!= crtc
)
391 encoder_funcs
= encoder
->helper_private
;
392 /* Disable the encoders as the first thing we do. */
393 encoder_funcs
->prepare(encoder
);
396 drm_crtc_prepare_encoders(dev
);
398 crtc_funcs
->prepare(crtc
);
400 /* Set up the DPLL and any encoders state that needs to adjust or depend
403 ret
= !crtc_funcs
->mode_set(crtc
, mode
, adjusted_mode
, x
, y
, old_fb
);
407 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
409 if (encoder
->crtc
!= crtc
)
412 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
413 encoder
->base
.id
, drm_get_encoder_name(encoder
),
414 mode
->base
.id
, mode
->name
);
415 encoder_funcs
= encoder
->helper_private
;
416 encoder_funcs
->mode_set(encoder
, mode
, adjusted_mode
);
419 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
420 crtc_funcs
->commit(crtc
);
422 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
424 if (encoder
->crtc
!= crtc
)
427 encoder_funcs
= encoder
->helper_private
;
428 encoder_funcs
->commit(encoder
);
432 /* Store real post-adjustment hardware mode. */
433 crtc
->hwmode
= *adjusted_mode
;
435 /* Calculate and store various constants which
436 * are later needed by vblank and swap-completion
437 * timestamping. They are derived from true hwmode.
439 drm_calc_timestamping_constants(crtc
);
441 /* FIXME: add subpixel order */
443 drm_mode_destroy(dev
, adjusted_mode
);
445 crtc
->hwmode
= saved_hwmode
;
446 crtc
->mode
= saved_mode
;
453 EXPORT_SYMBOL(drm_crtc_helper_set_mode
);
457 * drm_crtc_helper_set_config - set a new config from userspace
458 * @crtc: CRTC to setup
459 * @crtc_info: user provided configuration
460 * @new_mode: new mode to set
461 * @connector_set: set of connectors for the new config
462 * @fb: new framebuffer
465 * Caller must hold mode config lock.
467 * Setup a new configuration, provided by the user in @crtc_info, and enable
473 int drm_crtc_helper_set_config(struct drm_mode_set
*set
)
475 struct drm_device
*dev
;
476 struct drm_crtc
*save_crtcs
, *new_crtc
, *crtc
;
477 struct drm_encoder
*save_encoders
, *new_encoder
, *encoder
;
478 struct drm_framebuffer
*old_fb
= NULL
;
479 bool mode_changed
= false; /* if true do a full mode set */
480 bool fb_changed
= false; /* if true and !mode_changed just do a flip */
481 struct drm_connector
*save_connectors
, *connector
;
482 int count
= 0, ro
, fail
= 0;
483 struct drm_crtc_helper_funcs
*crtc_funcs
;
495 if (!set
->crtc
->helper_private
)
498 crtc_funcs
= set
->crtc
->helper_private
;
504 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
505 set
->crtc
->base
.id
, set
->fb
->base
.id
,
506 (int)set
->num_connectors
, set
->x
, set
->y
);
508 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set
->crtc
->base
.id
);
510 set
->num_connectors
= 0;
513 dev
= set
->crtc
->dev
;
515 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
517 save_crtcs
= kzalloc(dev
->mode_config
.num_crtc
*
518 sizeof(struct drm_crtc
), GFP_KERNEL
);
522 save_encoders
= kzalloc(dev
->mode_config
.num_encoder
*
523 sizeof(struct drm_encoder
), GFP_KERNEL
);
524 if (!save_encoders
) {
529 save_connectors
= kzalloc(dev
->mode_config
.num_connector
*
530 sizeof(struct drm_connector
), GFP_KERNEL
);
531 if (!save_connectors
) {
533 kfree(save_encoders
);
537 /* Copy data. Note that driver private data is not affected.
538 * Should anything bad happen only the expected state is
539 * restored, not the drivers personal bookkeeping.
542 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
543 save_crtcs
[count
++] = *crtc
;
547 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
548 save_encoders
[count
++] = *encoder
;
552 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
553 save_connectors
[count
++] = *connector
;
556 /* We should be able to check here if the fb has the same properties
557 * and then just flip_or_move it */
558 if (set
->crtc
->fb
!= set
->fb
) {
559 /* If we have no fb then treat it as a full mode set */
560 if (set
->crtc
->fb
== NULL
) {
561 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
563 } else if (set
->fb
== NULL
) {
565 } else if (set
->fb
->depth
!= set
->crtc
->fb
->depth
) {
567 } else if (set
->fb
->bits_per_pixel
!=
568 set
->crtc
->fb
->bits_per_pixel
) {
574 if (set
->x
!= set
->crtc
->x
|| set
->y
!= set
->crtc
->y
)
577 if (set
->mode
&& !drm_mode_equal(set
->mode
, &set
->crtc
->mode
)) {
578 DRM_DEBUG_KMS("modes are different, full mode set\n");
579 drm_mode_debug_printmodeline(&set
->crtc
->mode
);
580 drm_mode_debug_printmodeline(set
->mode
);
584 /* a) traverse passed in connector list and get encoders for them */
586 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
587 struct drm_connector_helper_funcs
*connector_funcs
=
588 connector
->helper_private
;
589 new_encoder
= connector
->encoder
;
590 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
591 if (set
->connectors
[ro
] == connector
) {
592 new_encoder
= connector_funcs
->best_encoder(connector
);
593 /* if we can't get an encoder for a connector
594 we are setting now - then fail */
595 if (new_encoder
== NULL
)
596 /* don't break so fail path works correct */
602 if (new_encoder
!= connector
->encoder
) {
603 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
605 /* If the encoder is reused for another connector, then
606 * the appropriate crtc will be set later.
608 if (connector
->encoder
)
609 connector
->encoder
->crtc
= NULL
;
610 connector
->encoder
= new_encoder
;
620 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
621 if (!connector
->encoder
)
624 if (connector
->encoder
->crtc
== set
->crtc
)
627 new_crtc
= connector
->encoder
->crtc
;
629 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
630 if (set
->connectors
[ro
] == connector
)
631 new_crtc
= set
->crtc
;
634 /* Make sure the new CRTC will work with the encoder */
636 !drm_encoder_crtc_ok(connector
->encoder
, new_crtc
)) {
640 if (new_crtc
!= connector
->encoder
->crtc
) {
641 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
643 connector
->encoder
->crtc
= new_crtc
;
646 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
647 connector
->base
.id
, drm_get_connector_name(connector
),
650 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
651 connector
->base
.id
, drm_get_connector_name(connector
));
655 /* mode_set_base is not a required function */
656 if (fb_changed
&& !crtc_funcs
->mode_set_base
)
660 set
->crtc
->enabled
= drm_helper_crtc_in_use(set
->crtc
);
661 if (set
->crtc
->enabled
) {
662 DRM_DEBUG_KMS("attempting to set mode from"
664 drm_mode_debug_printmodeline(set
->mode
);
665 old_fb
= set
->crtc
->fb
;
666 set
->crtc
->fb
= set
->fb
;
667 if (!drm_crtc_helper_set_mode(set
->crtc
, set
->mode
,
670 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
672 set
->crtc
->fb
= old_fb
;
676 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
677 for (i
= 0; i
< set
->num_connectors
; i
++) {
678 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set
->connectors
[i
]->base
.id
,
679 drm_get_connector_name(set
->connectors
[i
]));
680 set
->connectors
[i
]->dpms
= DRM_MODE_DPMS_ON
;
683 drm_helper_disable_unused_functions(dev
);
684 } else if (fb_changed
) {
685 set
->crtc
->x
= set
->x
;
686 set
->crtc
->y
= set
->y
;
688 old_fb
= set
->crtc
->fb
;
689 if (set
->crtc
->fb
!= set
->fb
)
690 set
->crtc
->fb
= set
->fb
;
691 ret
= crtc_funcs
->mode_set_base(set
->crtc
,
692 set
->x
, set
->y
, old_fb
);
694 set
->crtc
->fb
= old_fb
;
699 kfree(save_connectors
);
700 kfree(save_encoders
);
705 /* Restore all previous data. */
707 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
708 *crtc
= save_crtcs
[count
++];
712 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
713 *encoder
= save_encoders
[count
++];
717 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
718 *connector
= save_connectors
[count
++];
721 kfree(save_connectors
);
722 kfree(save_encoders
);
726 EXPORT_SYMBOL(drm_crtc_helper_set_config
);
728 static int drm_helper_choose_encoder_dpms(struct drm_encoder
*encoder
)
730 int dpms
= DRM_MODE_DPMS_OFF
;
731 struct drm_connector
*connector
;
732 struct drm_device
*dev
= encoder
->dev
;
734 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
735 if (connector
->encoder
== encoder
)
736 if (connector
->dpms
< dpms
)
737 dpms
= connector
->dpms
;
741 static int drm_helper_choose_crtc_dpms(struct drm_crtc
*crtc
)
743 int dpms
= DRM_MODE_DPMS_OFF
;
744 struct drm_connector
*connector
;
745 struct drm_device
*dev
= crtc
->dev
;
747 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
748 if (connector
->encoder
&& connector
->encoder
->crtc
== crtc
)
749 if (connector
->dpms
< dpms
)
750 dpms
= connector
->dpms
;
755 * drm_helper_connector_dpms
756 * @connector affected connector
759 * Calls the low-level connector DPMS function, then
760 * calls appropriate encoder and crtc DPMS functions as well
762 void drm_helper_connector_dpms(struct drm_connector
*connector
, int mode
)
764 struct drm_encoder
*encoder
= connector
->encoder
;
765 struct drm_crtc
*crtc
= encoder
? encoder
->crtc
: NULL
;
768 if (mode
== connector
->dpms
)
771 old_dpms
= connector
->dpms
;
772 connector
->dpms
= mode
;
774 /* from off to on, do crtc then encoder */
775 if (mode
< old_dpms
) {
777 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
778 if (crtc_funcs
->dpms
)
779 (*crtc_funcs
->dpms
) (crtc
,
780 drm_helper_choose_crtc_dpms(crtc
));
783 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
784 if (encoder_funcs
->dpms
)
785 (*encoder_funcs
->dpms
) (encoder
,
786 drm_helper_choose_encoder_dpms(encoder
));
790 /* from on to off, do encoder then crtc */
791 if (mode
> old_dpms
) {
793 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
794 if (encoder_funcs
->dpms
)
795 (*encoder_funcs
->dpms
) (encoder
,
796 drm_helper_choose_encoder_dpms(encoder
));
799 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
800 if (crtc_funcs
->dpms
)
801 (*crtc_funcs
->dpms
) (crtc
,
802 drm_helper_choose_crtc_dpms(crtc
));
808 EXPORT_SYMBOL(drm_helper_connector_dpms
);
810 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer
*fb
,
811 struct drm_mode_fb_cmd
*mode_cmd
)
813 fb
->width
= mode_cmd
->width
;
814 fb
->height
= mode_cmd
->height
;
815 fb
->pitch
= mode_cmd
->pitch
;
816 fb
->bits_per_pixel
= mode_cmd
->bpp
;
817 fb
->depth
= mode_cmd
->depth
;
821 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct
);
823 int drm_helper_resume_force_mode(struct drm_device
*dev
)
825 struct drm_crtc
*crtc
;
826 struct drm_encoder
*encoder
;
827 struct drm_encoder_helper_funcs
*encoder_funcs
;
828 struct drm_crtc_helper_funcs
*crtc_funcs
;
831 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
836 ret
= drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
837 crtc
->x
, crtc
->y
, crtc
->fb
);
840 DRM_ERROR("failed to set mode on crtc %p\n", crtc
);
842 /* Turn off outputs that were already powered off */
843 if (drm_helper_choose_crtc_dpms(crtc
)) {
844 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
846 if(encoder
->crtc
!= crtc
)
849 encoder_funcs
= encoder
->helper_private
;
850 if (encoder_funcs
->dpms
)
851 (*encoder_funcs
->dpms
) (encoder
,
852 drm_helper_choose_encoder_dpms(encoder
));
855 crtc_funcs
= crtc
->helper_private
;
856 if (crtc_funcs
->dpms
)
857 (*crtc_funcs
->dpms
) (crtc
,
858 drm_helper_choose_crtc_dpms(crtc
));
861 /* disable the unused connectors while restoring the modesetting */
862 drm_helper_disable_unused_functions(dev
);
865 EXPORT_SYMBOL(drm_helper_resume_force_mode
);
867 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
868 static void output_poll_execute(struct work_struct
*work
)
870 struct delayed_work
*delayed_work
= to_delayed_work(work
);
871 struct drm_device
*dev
= container_of(delayed_work
, struct drm_device
, mode_config
.output_poll_work
);
872 struct drm_connector
*connector
;
873 enum drm_connector_status old_status
;
874 bool repoll
= false, changed
= false;
876 if (!drm_kms_helper_poll
)
879 mutex_lock(&dev
->mode_config
.mutex
);
880 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
882 /* if this is HPD or polled don't check it -
883 TV out for instance */
884 if (!connector
->polled
)
887 else if (connector
->polled
& (DRM_CONNECTOR_POLL_CONNECT
| DRM_CONNECTOR_POLL_DISCONNECT
))
890 old_status
= connector
->status
;
891 /* if we are connected and don't want to poll for disconnect
893 if (old_status
== connector_status_connected
&&
894 !(connector
->polled
& DRM_CONNECTOR_POLL_DISCONNECT
) &&
895 !(connector
->polled
& DRM_CONNECTOR_POLL_HPD
))
898 connector
->status
= connector
->funcs
->detect(connector
, false);
899 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
901 drm_get_connector_name(connector
),
902 old_status
, connector
->status
);
903 if (old_status
!= connector
->status
)
907 mutex_unlock(&dev
->mode_config
.mutex
);
910 /* send a uevent + call fbdev */
911 drm_sysfs_hotplug_event(dev
);
912 if (dev
->mode_config
.funcs
->output_poll_changed
)
913 dev
->mode_config
.funcs
->output_poll_changed(dev
);
917 queue_delayed_work(system_nrt_wq
, delayed_work
, DRM_OUTPUT_POLL_PERIOD
);
920 void drm_kms_helper_poll_disable(struct drm_device
*dev
)
922 if (!dev
->mode_config
.poll_enabled
)
924 cancel_delayed_work_sync(&dev
->mode_config
.output_poll_work
);
926 EXPORT_SYMBOL(drm_kms_helper_poll_disable
);
928 void drm_kms_helper_poll_enable(struct drm_device
*dev
)
931 struct drm_connector
*connector
;
933 if (!dev
->mode_config
.poll_enabled
|| !drm_kms_helper_poll
)
936 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
937 if (connector
->polled
)
942 queue_delayed_work(system_nrt_wq
, &dev
->mode_config
.output_poll_work
, DRM_OUTPUT_POLL_PERIOD
);
944 EXPORT_SYMBOL(drm_kms_helper_poll_enable
);
946 void drm_kms_helper_poll_init(struct drm_device
*dev
)
948 INIT_DELAYED_WORK(&dev
->mode_config
.output_poll_work
, output_poll_execute
);
949 dev
->mode_config
.poll_enabled
= true;
951 drm_kms_helper_poll_enable(dev
);
953 EXPORT_SYMBOL(drm_kms_helper_poll_init
);
955 void drm_kms_helper_poll_fini(struct drm_device
*dev
)
957 drm_kms_helper_poll_disable(dev
);
959 EXPORT_SYMBOL(drm_kms_helper_poll_fini
);
961 void drm_helper_hpd_irq_event(struct drm_device
*dev
)
963 if (!dev
->mode_config
.poll_enabled
)
966 /* kill timer and schedule immediate execution, this doesn't block */
967 cancel_delayed_work(&dev
->mode_config
.output_poll_work
);
968 if (drm_kms_helper_poll
)
969 queue_delayed_work(system_nrt_wq
, &dev
->mode_config
.output_poll_work
, 0);
971 EXPORT_SYMBOL(drm_helper_hpd_irq_event
);