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);
132 /* Re-enable polling in case the global poll config changed. */
133 if (drm_kms_helper_poll
!= dev
->mode_config
.poll_running
)
134 drm_kms_helper_poll_enable(dev
);
136 dev
->mode_config
.poll_running
= drm_kms_helper_poll
;
138 if (connector
->status
== connector_status_disconnected
) {
139 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
140 connector
->base
.id
, drm_get_connector_name(connector
));
141 drm_mode_connector_update_edid_property(connector
, NULL
);
145 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
146 count
= drm_load_edid_firmware(connector
);
149 count
= (*connector_funcs
->get_modes
)(connector
);
151 if (count
== 0 && connector
->status
== connector_status_connected
)
152 count
= drm_add_modes_noedid(connector
, 1024, 768);
156 drm_mode_connector_list_update(connector
);
159 drm_mode_validate_size(dev
, &connector
->modes
, maxX
,
162 if (connector
->interlace_allowed
)
163 mode_flags
|= DRM_MODE_FLAG_INTERLACE
;
164 if (connector
->doublescan_allowed
)
165 mode_flags
|= DRM_MODE_FLAG_DBLSCAN
;
166 drm_mode_validate_flag(connector
, mode_flags
);
168 list_for_each_entry(mode
, &connector
->modes
, head
) {
169 if (mode
->status
== MODE_OK
)
170 mode
->status
= connector_funcs
->mode_valid(connector
,
175 drm_mode_prune_invalid(dev
, &connector
->modes
, true);
177 if (list_empty(&connector
->modes
))
180 drm_mode_sort(&connector
->modes
);
182 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector
->base
.id
,
183 drm_get_connector_name(connector
));
184 list_for_each_entry(mode
, &connector
->modes
, head
) {
185 mode
->vrefresh
= drm_mode_vrefresh(mode
);
187 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
188 drm_mode_debug_printmodeline(mode
);
193 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes
);
196 * drm_helper_encoder_in_use - check if a given encoder is in use
197 * @encoder: encoder to check
200 * Caller must hold mode config lock.
202 * Walk @encoders's DRM device's mode_config and see if it's in use.
205 * True if @encoder is part of the mode_config, false otherwise.
207 bool drm_helper_encoder_in_use(struct drm_encoder
*encoder
)
209 struct drm_connector
*connector
;
210 struct drm_device
*dev
= encoder
->dev
;
211 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
212 if (connector
->encoder
== encoder
)
216 EXPORT_SYMBOL(drm_helper_encoder_in_use
);
219 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
220 * @crtc: CRTC to check
223 * Caller must hold mode config lock.
225 * Walk @crtc's DRM device's mode_config and see if it's in use.
228 * True if @crtc is part of the mode_config, false otherwise.
230 bool drm_helper_crtc_in_use(struct drm_crtc
*crtc
)
232 struct drm_encoder
*encoder
;
233 struct drm_device
*dev
= crtc
->dev
;
234 /* FIXME: Locking around list access? */
235 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
)
236 if (encoder
->crtc
== crtc
&& drm_helper_encoder_in_use(encoder
))
240 EXPORT_SYMBOL(drm_helper_crtc_in_use
);
243 drm_encoder_disable(struct drm_encoder
*encoder
)
245 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
247 if (encoder_funcs
->disable
)
248 (*encoder_funcs
->disable
)(encoder
);
250 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
254 * drm_helper_disable_unused_functions - disable unused objects
258 * Caller must hold mode config lock.
260 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
261 * by calling its dpms function, which should power it off.
263 void drm_helper_disable_unused_functions(struct drm_device
*dev
)
265 struct drm_encoder
*encoder
;
266 struct drm_connector
*connector
;
267 struct drm_crtc
*crtc
;
269 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
270 if (!connector
->encoder
)
272 if (connector
->status
== connector_status_disconnected
)
273 connector
->encoder
= NULL
;
276 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
277 if (!drm_helper_encoder_in_use(encoder
)) {
278 drm_encoder_disable(encoder
);
279 /* disconnector encoder from any connector */
280 encoder
->crtc
= NULL
;
284 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
285 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
286 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
287 if (!crtc
->enabled
) {
288 if (crtc_funcs
->disable
)
289 (*crtc_funcs
->disable
)(crtc
);
291 (*crtc_funcs
->dpms
)(crtc
, DRM_MODE_DPMS_OFF
);
296 EXPORT_SYMBOL(drm_helper_disable_unused_functions
);
299 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
300 * @encoder: encoder to test
301 * @crtc: crtc to test
303 * Return false if @encoder can't be driven by @crtc, true otherwise.
305 static bool drm_encoder_crtc_ok(struct drm_encoder
*encoder
,
306 struct drm_crtc
*crtc
)
308 struct drm_device
*dev
;
309 struct drm_crtc
*tmp
;
312 WARN(!crtc
, "checking null crtc?\n");
316 list_for_each_entry(tmp
, &dev
->mode_config
.crtc_list
, head
) {
322 if (encoder
->possible_crtcs
& crtc_mask
)
328 * Check the CRTC we're going to map each output to vs. its current
329 * CRTC. If they don't match, we have to disable the output and the CRTC
330 * since the driver will have to re-route things.
333 drm_crtc_prepare_encoders(struct drm_device
*dev
)
335 struct drm_encoder_helper_funcs
*encoder_funcs
;
336 struct drm_encoder
*encoder
;
338 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
339 encoder_funcs
= encoder
->helper_private
;
340 /* Disable unused encoders */
341 if (encoder
->crtc
== NULL
)
342 drm_encoder_disable(encoder
);
343 /* Disable encoders whose CRTC is about to change */
344 if (encoder_funcs
->get_crtc
&&
345 encoder
->crtc
!= (*encoder_funcs
->get_crtc
)(encoder
))
346 drm_encoder_disable(encoder
);
351 * drm_crtc_set_mode - set a mode
352 * @crtc: CRTC to program
354 * @x: horizontal offset into the surface
355 * @y: vertical offset into the surface
358 * Caller must hold mode config lock.
360 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
361 * to fixup or reject the mode prior to trying to set it.
364 * True if the mode was set successfully, or false otherwise.
366 bool drm_crtc_helper_set_mode(struct drm_crtc
*crtc
,
367 struct drm_display_mode
*mode
,
369 struct drm_framebuffer
*old_fb
)
371 struct drm_device
*dev
= crtc
->dev
;
372 struct drm_display_mode
*adjusted_mode
, saved_mode
, saved_hwmode
;
373 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
374 struct drm_encoder_helper_funcs
*encoder_funcs
;
375 int saved_x
, saved_y
;
376 struct drm_encoder
*encoder
;
379 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
383 adjusted_mode
= drm_mode_duplicate(dev
, mode
);
387 saved_hwmode
= crtc
->hwmode
;
388 saved_mode
= crtc
->mode
;
392 /* Update crtc values up front so the driver can rely on them for mode
399 /* Pass our mode to the connectors and the CRTC to give them a chance to
400 * adjust it according to limitations or connector properties, and also
401 * a chance to reject the mode entirely.
403 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
405 if (encoder
->crtc
!= crtc
)
407 encoder_funcs
= encoder
->helper_private
;
408 if (!(ret
= encoder_funcs
->mode_fixup(encoder
, mode
,
410 DRM_DEBUG_KMS("Encoder fixup failed\n");
415 if (!(ret
= crtc_funcs
->mode_fixup(crtc
, mode
, adjusted_mode
))) {
416 DRM_DEBUG_KMS("CRTC fixup failed\n");
419 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc
->base
.id
);
421 /* Prepare the encoders and CRTCs before setting the mode. */
422 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
424 if (encoder
->crtc
!= crtc
)
426 encoder_funcs
= encoder
->helper_private
;
427 /* Disable the encoders as the first thing we do. */
428 encoder_funcs
->prepare(encoder
);
431 drm_crtc_prepare_encoders(dev
);
433 crtc_funcs
->prepare(crtc
);
435 /* Set up the DPLL and any encoders state that needs to adjust or depend
438 ret
= !crtc_funcs
->mode_set(crtc
, mode
, adjusted_mode
, x
, y
, old_fb
);
442 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
444 if (encoder
->crtc
!= crtc
)
447 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
448 encoder
->base
.id
, drm_get_encoder_name(encoder
),
449 mode
->base
.id
, mode
->name
);
450 encoder_funcs
= encoder
->helper_private
;
451 encoder_funcs
->mode_set(encoder
, mode
, adjusted_mode
);
454 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
455 crtc_funcs
->commit(crtc
);
457 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
459 if (encoder
->crtc
!= crtc
)
462 encoder_funcs
= encoder
->helper_private
;
463 encoder_funcs
->commit(encoder
);
467 /* Store real post-adjustment hardware mode. */
468 crtc
->hwmode
= *adjusted_mode
;
470 /* Calculate and store various constants which
471 * are later needed by vblank and swap-completion
472 * timestamping. They are derived from true hwmode.
474 drm_calc_timestamping_constants(crtc
);
476 /* FIXME: add subpixel order */
478 drm_mode_destroy(dev
, adjusted_mode
);
480 crtc
->hwmode
= saved_hwmode
;
481 crtc
->mode
= saved_mode
;
488 EXPORT_SYMBOL(drm_crtc_helper_set_mode
);
492 drm_crtc_helper_disable(struct drm_crtc
*crtc
)
494 struct drm_device
*dev
= crtc
->dev
;
495 struct drm_connector
*connector
;
496 struct drm_encoder
*encoder
;
498 /* Decouple all encoders and their attached connectors from this crtc */
499 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
500 if (encoder
->crtc
!= crtc
)
503 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
504 if (connector
->encoder
!= encoder
)
507 connector
->encoder
= NULL
;
511 drm_helper_disable_unused_functions(dev
);
516 * drm_crtc_helper_set_config - set a new config from userspace
517 * @crtc: CRTC to setup
518 * @crtc_info: user provided configuration
519 * @new_mode: new mode to set
520 * @connector_set: set of connectors for the new config
521 * @fb: new framebuffer
524 * Caller must hold mode config lock.
526 * Setup a new configuration, provided by the user in @crtc_info, and enable
532 int drm_crtc_helper_set_config(struct drm_mode_set
*set
)
534 struct drm_device
*dev
;
535 struct drm_crtc
*save_crtcs
, *new_crtc
, *crtc
;
536 struct drm_encoder
*save_encoders
, *new_encoder
, *encoder
;
537 struct drm_framebuffer
*old_fb
= NULL
;
538 bool mode_changed
= false; /* if true do a full mode set */
539 bool fb_changed
= false; /* if true and !mode_changed just do a flip */
540 struct drm_connector
*save_connectors
, *connector
;
541 int count
= 0, ro
, fail
= 0;
542 struct drm_crtc_helper_funcs
*crtc_funcs
;
543 struct drm_mode_set save_set
;
555 if (!set
->crtc
->helper_private
)
558 crtc_funcs
= set
->crtc
->helper_private
;
564 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
565 set
->crtc
->base
.id
, set
->fb
->base
.id
,
566 (int)set
->num_connectors
, set
->x
, set
->y
);
568 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set
->crtc
->base
.id
);
569 return drm_crtc_helper_disable(set
->crtc
);
572 dev
= set
->crtc
->dev
;
574 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
576 save_crtcs
= kzalloc(dev
->mode_config
.num_crtc
*
577 sizeof(struct drm_crtc
), GFP_KERNEL
);
581 save_encoders
= kzalloc(dev
->mode_config
.num_encoder
*
582 sizeof(struct drm_encoder
), GFP_KERNEL
);
583 if (!save_encoders
) {
588 save_connectors
= kzalloc(dev
->mode_config
.num_connector
*
589 sizeof(struct drm_connector
), GFP_KERNEL
);
590 if (!save_connectors
) {
592 kfree(save_encoders
);
596 /* Copy data. Note that driver private data is not affected.
597 * Should anything bad happen only the expected state is
598 * restored, not the drivers personal bookkeeping.
601 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
602 save_crtcs
[count
++] = *crtc
;
606 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
607 save_encoders
[count
++] = *encoder
;
611 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
612 save_connectors
[count
++] = *connector
;
615 save_set
.crtc
= set
->crtc
;
616 save_set
.mode
= &set
->crtc
->mode
;
617 save_set
.x
= set
->crtc
->x
;
618 save_set
.y
= set
->crtc
->y
;
619 save_set
.fb
= set
->crtc
->fb
;
621 /* We should be able to check here if the fb has the same properties
622 * and then just flip_or_move it */
623 if (set
->crtc
->fb
!= set
->fb
) {
624 /* If we have no fb then treat it as a full mode set */
625 if (set
->crtc
->fb
== NULL
) {
626 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
628 } else if (set
->fb
== NULL
) {
630 } else if (set
->fb
->depth
!= set
->crtc
->fb
->depth
) {
632 } else if (set
->fb
->bits_per_pixel
!=
633 set
->crtc
->fb
->bits_per_pixel
) {
639 if (set
->x
!= set
->crtc
->x
|| set
->y
!= set
->crtc
->y
)
642 if (set
->mode
&& !drm_mode_equal(set
->mode
, &set
->crtc
->mode
)) {
643 DRM_DEBUG_KMS("modes are different, full mode set\n");
644 drm_mode_debug_printmodeline(&set
->crtc
->mode
);
645 drm_mode_debug_printmodeline(set
->mode
);
649 /* a) traverse passed in connector list and get encoders for them */
651 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
652 struct drm_connector_helper_funcs
*connector_funcs
=
653 connector
->helper_private
;
654 new_encoder
= connector
->encoder
;
655 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
656 if (set
->connectors
[ro
] == connector
) {
657 new_encoder
= connector_funcs
->best_encoder(connector
);
658 /* if we can't get an encoder for a connector
659 we are setting now - then fail */
660 if (new_encoder
== NULL
)
661 /* don't break so fail path works correct */
667 if (new_encoder
!= connector
->encoder
) {
668 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
670 /* If the encoder is reused for another connector, then
671 * the appropriate crtc will be set later.
673 if (connector
->encoder
)
674 connector
->encoder
->crtc
= NULL
;
675 connector
->encoder
= new_encoder
;
685 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
686 if (!connector
->encoder
)
689 if (connector
->encoder
->crtc
== set
->crtc
)
692 new_crtc
= connector
->encoder
->crtc
;
694 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
695 if (set
->connectors
[ro
] == connector
)
696 new_crtc
= set
->crtc
;
699 /* Make sure the new CRTC will work with the encoder */
701 !drm_encoder_crtc_ok(connector
->encoder
, new_crtc
)) {
705 if (new_crtc
!= connector
->encoder
->crtc
) {
706 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
708 connector
->encoder
->crtc
= new_crtc
;
711 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
712 connector
->base
.id
, drm_get_connector_name(connector
),
715 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
716 connector
->base
.id
, drm_get_connector_name(connector
));
720 /* mode_set_base is not a required function */
721 if (fb_changed
&& !crtc_funcs
->mode_set_base
)
725 set
->crtc
->enabled
= drm_helper_crtc_in_use(set
->crtc
);
726 if (set
->crtc
->enabled
) {
727 DRM_DEBUG_KMS("attempting to set mode from"
729 drm_mode_debug_printmodeline(set
->mode
);
730 old_fb
= set
->crtc
->fb
;
731 set
->crtc
->fb
= set
->fb
;
732 if (!drm_crtc_helper_set_mode(set
->crtc
, set
->mode
,
735 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
737 set
->crtc
->fb
= old_fb
;
741 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
742 for (i
= 0; i
< set
->num_connectors
; i
++) {
743 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set
->connectors
[i
]->base
.id
,
744 drm_get_connector_name(set
->connectors
[i
]));
745 set
->connectors
[i
]->funcs
->dpms(set
->connectors
[i
], DRM_MODE_DPMS_ON
);
748 drm_helper_disable_unused_functions(dev
);
749 } else if (fb_changed
) {
750 set
->crtc
->x
= set
->x
;
751 set
->crtc
->y
= set
->y
;
753 old_fb
= set
->crtc
->fb
;
754 if (set
->crtc
->fb
!= set
->fb
)
755 set
->crtc
->fb
= set
->fb
;
756 ret
= crtc_funcs
->mode_set_base(set
->crtc
,
757 set
->x
, set
->y
, old_fb
);
759 set
->crtc
->fb
= old_fb
;
764 kfree(save_connectors
);
765 kfree(save_encoders
);
770 /* Restore all previous data. */
772 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
773 *crtc
= save_crtcs
[count
++];
777 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
778 *encoder
= save_encoders
[count
++];
782 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
783 *connector
= save_connectors
[count
++];
786 /* Try to restore the config */
788 !drm_crtc_helper_set_mode(save_set
.crtc
, save_set
.mode
, save_set
.x
,
789 save_set
.y
, save_set
.fb
))
790 DRM_ERROR("failed to restore config after modeset failure\n");
792 kfree(save_connectors
);
793 kfree(save_encoders
);
797 EXPORT_SYMBOL(drm_crtc_helper_set_config
);
799 static int drm_helper_choose_encoder_dpms(struct drm_encoder
*encoder
)
801 int dpms
= DRM_MODE_DPMS_OFF
;
802 struct drm_connector
*connector
;
803 struct drm_device
*dev
= encoder
->dev
;
805 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
806 if (connector
->encoder
== encoder
)
807 if (connector
->dpms
< dpms
)
808 dpms
= connector
->dpms
;
812 static int drm_helper_choose_crtc_dpms(struct drm_crtc
*crtc
)
814 int dpms
= DRM_MODE_DPMS_OFF
;
815 struct drm_connector
*connector
;
816 struct drm_device
*dev
= crtc
->dev
;
818 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
819 if (connector
->encoder
&& connector
->encoder
->crtc
== crtc
)
820 if (connector
->dpms
< dpms
)
821 dpms
= connector
->dpms
;
826 * drm_helper_connector_dpms
827 * @connector affected connector
830 * Calls the low-level connector DPMS function, then
831 * calls appropriate encoder and crtc DPMS functions as well
833 void drm_helper_connector_dpms(struct drm_connector
*connector
, int mode
)
835 struct drm_encoder
*encoder
= connector
->encoder
;
836 struct drm_crtc
*crtc
= encoder
? encoder
->crtc
: NULL
;
839 if (mode
== connector
->dpms
)
842 old_dpms
= connector
->dpms
;
843 connector
->dpms
= mode
;
845 /* from off to on, do crtc then encoder */
846 if (mode
< old_dpms
) {
848 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
849 if (crtc_funcs
->dpms
)
850 (*crtc_funcs
->dpms
) (crtc
,
851 drm_helper_choose_crtc_dpms(crtc
));
854 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
855 if (encoder_funcs
->dpms
)
856 (*encoder_funcs
->dpms
) (encoder
,
857 drm_helper_choose_encoder_dpms(encoder
));
861 /* from on to off, do encoder then crtc */
862 if (mode
> old_dpms
) {
864 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
865 if (encoder_funcs
->dpms
)
866 (*encoder_funcs
->dpms
) (encoder
,
867 drm_helper_choose_encoder_dpms(encoder
));
870 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
871 if (crtc_funcs
->dpms
)
872 (*crtc_funcs
->dpms
) (crtc
,
873 drm_helper_choose_crtc_dpms(crtc
));
879 EXPORT_SYMBOL(drm_helper_connector_dpms
);
881 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer
*fb
,
882 struct drm_mode_fb_cmd2
*mode_cmd
)
886 fb
->width
= mode_cmd
->width
;
887 fb
->height
= mode_cmd
->height
;
888 for (i
= 0; i
< 4; i
++) {
889 fb
->pitches
[i
] = mode_cmd
->pitches
[i
];
890 fb
->offsets
[i
] = mode_cmd
->offsets
[i
];
892 drm_fb_get_bpp_depth(mode_cmd
->pixel_format
, &fb
->depth
,
893 &fb
->bits_per_pixel
);
894 fb
->pixel_format
= mode_cmd
->pixel_format
;
898 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct
);
900 int drm_helper_resume_force_mode(struct drm_device
*dev
)
902 struct drm_crtc
*crtc
;
903 struct drm_encoder
*encoder
;
904 struct drm_encoder_helper_funcs
*encoder_funcs
;
905 struct drm_crtc_helper_funcs
*crtc_funcs
;
908 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
913 ret
= drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
914 crtc
->x
, crtc
->y
, crtc
->fb
);
917 DRM_ERROR("failed to set mode on crtc %p\n", crtc
);
919 /* Turn off outputs that were already powered off */
920 if (drm_helper_choose_crtc_dpms(crtc
)) {
921 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
923 if(encoder
->crtc
!= crtc
)
926 encoder_funcs
= encoder
->helper_private
;
927 if (encoder_funcs
->dpms
)
928 (*encoder_funcs
->dpms
) (encoder
,
929 drm_helper_choose_encoder_dpms(encoder
));
932 crtc_funcs
= crtc
->helper_private
;
933 if (crtc_funcs
->dpms
)
934 (*crtc_funcs
->dpms
) (crtc
,
935 drm_helper_choose_crtc_dpms(crtc
));
938 /* disable the unused connectors while restoring the modesetting */
939 drm_helper_disable_unused_functions(dev
);
942 EXPORT_SYMBOL(drm_helper_resume_force_mode
);
944 void drm_kms_helper_hotplug_event(struct drm_device
*dev
)
946 /* send a uevent + call fbdev */
947 drm_sysfs_hotplug_event(dev
);
948 if (dev
->mode_config
.funcs
->output_poll_changed
)
949 dev
->mode_config
.funcs
->output_poll_changed(dev
);
951 EXPORT_SYMBOL(drm_kms_helper_hotplug_event
);
953 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
954 static void output_poll_execute(struct work_struct
*work
)
956 struct delayed_work
*delayed_work
= to_delayed_work(work
);
957 struct drm_device
*dev
= container_of(delayed_work
, struct drm_device
, mode_config
.output_poll_work
);
958 struct drm_connector
*connector
;
959 enum drm_connector_status old_status
;
960 bool repoll
= false, changed
= false;
962 if (!drm_kms_helper_poll
)
965 mutex_lock(&dev
->mode_config
.mutex
);
966 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
968 /* Ignore forced connectors. */
969 if (connector
->force
)
972 /* Ignore HPD capable connectors and connectors where we don't
973 * want any hotplug detection at all for polling. */
974 if (!connector
->polled
|| connector
->polled
== DRM_CONNECTOR_POLL_HPD
)
977 else if (connector
->polled
& (DRM_CONNECTOR_POLL_CONNECT
| DRM_CONNECTOR_POLL_DISCONNECT
))
980 old_status
= connector
->status
;
981 /* if we are connected and don't want to poll for disconnect
983 if (old_status
== connector_status_connected
&&
984 !(connector
->polled
& DRM_CONNECTOR_POLL_DISCONNECT
))
987 connector
->status
= connector
->funcs
->detect(connector
, false);
988 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
990 drm_get_connector_name(connector
),
991 old_status
, connector
->status
);
992 if (old_status
!= connector
->status
)
996 mutex_unlock(&dev
->mode_config
.mutex
);
999 drm_kms_helper_hotplug_event(dev
);
1002 schedule_delayed_work(delayed_work
, DRM_OUTPUT_POLL_PERIOD
);
1005 void drm_kms_helper_poll_disable(struct drm_device
*dev
)
1007 if (!dev
->mode_config
.poll_enabled
)
1009 cancel_delayed_work_sync(&dev
->mode_config
.output_poll_work
);
1011 EXPORT_SYMBOL(drm_kms_helper_poll_disable
);
1013 void drm_kms_helper_poll_enable(struct drm_device
*dev
)
1016 struct drm_connector
*connector
;
1018 if (!dev
->mode_config
.poll_enabled
|| !drm_kms_helper_poll
)
1021 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1022 if (connector
->polled
)
1027 schedule_delayed_work(&dev
->mode_config
.output_poll_work
, DRM_OUTPUT_POLL_PERIOD
);
1029 EXPORT_SYMBOL(drm_kms_helper_poll_enable
);
1031 void drm_kms_helper_poll_init(struct drm_device
*dev
)
1033 INIT_DELAYED_WORK(&dev
->mode_config
.output_poll_work
, output_poll_execute
);
1034 dev
->mode_config
.poll_enabled
= true;
1036 drm_kms_helper_poll_enable(dev
);
1038 EXPORT_SYMBOL(drm_kms_helper_poll_init
);
1040 void drm_kms_helper_poll_fini(struct drm_device
*dev
)
1042 drm_kms_helper_poll_disable(dev
);
1044 EXPORT_SYMBOL(drm_kms_helper_poll_fini
);
1046 void drm_helper_hpd_irq_event(struct drm_device
*dev
)
1048 struct drm_connector
*connector
;
1049 enum drm_connector_status old_status
;
1050 bool changed
= false;
1052 if (!dev
->mode_config
.poll_enabled
)
1055 mutex_lock(&dev
->mode_config
.mutex
);
1056 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1058 /* Only handle HPD capable connectors. */
1059 if (!(connector
->polled
& DRM_CONNECTOR_POLL_HPD
))
1062 old_status
= connector
->status
;
1064 connector
->status
= connector
->funcs
->detect(connector
, false);
1065 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
1067 drm_get_connector_name(connector
),
1068 old_status
, connector
->status
);
1069 if (old_status
!= connector
->status
)
1073 mutex_unlock(&dev
->mode_config
.mutex
);
1076 drm_kms_helper_hotplug_event(dev
);
1078 EXPORT_SYMBOL(drm_helper_hpd_irq_event
);