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>
43 * drm_helper_move_panel_connectors_to_head() - move panels to the front in the
45 * @dev: drm device to operate on
47 * Some userspace presumes that the first connected connector is the main
48 * display, where it's supposed to display e.g. the login screen. For
49 * laptops, this should be the main panel. Use this function to sort all
50 * (eDP/LVDS) panels to the front of the connector list, instead of
51 * painstakingly trying to initialize them in the right order.
53 void drm_helper_move_panel_connectors_to_head(struct drm_device
*dev
)
55 struct drm_connector
*connector
, *tmp
;
56 struct list_head panel_list
;
58 INIT_LIST_HEAD(&panel_list
);
60 list_for_each_entry_safe(connector
, tmp
,
61 &dev
->mode_config
.connector_list
, head
) {
62 if (connector
->connector_type
== DRM_MODE_CONNECTOR_LVDS
||
63 connector
->connector_type
== DRM_MODE_CONNECTOR_eDP
)
64 list_move_tail(&connector
->head
, &panel_list
);
67 list_splice(&panel_list
, &dev
->mode_config
.connector_list
);
69 EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head
);
71 static bool drm_kms_helper_poll
= true;
72 module_param_named(poll
, drm_kms_helper_poll
, bool, 0600);
74 static void drm_mode_validate_flag(struct drm_connector
*connector
,
77 struct drm_display_mode
*mode
;
79 if (flags
== (DRM_MODE_FLAG_DBLSCAN
| DRM_MODE_FLAG_INTERLACE
))
82 list_for_each_entry(mode
, &connector
->modes
, head
) {
83 if ((mode
->flags
& DRM_MODE_FLAG_INTERLACE
) &&
84 !(flags
& DRM_MODE_FLAG_INTERLACE
))
85 mode
->status
= MODE_NO_INTERLACE
;
86 if ((mode
->flags
& DRM_MODE_FLAG_DBLSCAN
) &&
87 !(flags
& DRM_MODE_FLAG_DBLSCAN
))
88 mode
->status
= MODE_NO_DBLESCAN
;
95 * drm_helper_probe_single_connector_modes - get complete set of display modes
96 * @connector: connector to probe
97 * @maxX: max width for modes
98 * @maxY: max height for modes
101 * Caller must hold mode config lock.
103 * Based on the helper callbacks implemented by @connector try to detect all
104 * valid modes. Modes will first be added to the connector's probed_modes list,
105 * then culled (based on validity and the @maxX, @maxY parameters) and put into
106 * the normal modes list.
108 * Intended to be use as a generic implementation of the ->probe() @connector
109 * callback for drivers that use the crtc helpers for output mode filtering and
113 * Number of modes found on @connector.
115 int drm_helper_probe_single_connector_modes(struct drm_connector
*connector
,
116 uint32_t maxX
, uint32_t maxY
)
118 struct drm_device
*dev
= connector
->dev
;
119 struct drm_display_mode
*mode
;
120 struct drm_connector_helper_funcs
*connector_funcs
=
121 connector
->helper_private
;
125 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector
->base
.id
,
126 drm_get_connector_name(connector
));
127 /* set all modes to the unverified state */
128 list_for_each_entry(mode
, &connector
->modes
, head
)
129 mode
->status
= MODE_UNVERIFIED
;
131 if (connector
->force
) {
132 if (connector
->force
== DRM_FORCE_ON
)
133 connector
->status
= connector_status_connected
;
135 connector
->status
= connector_status_disconnected
;
136 if (connector
->funcs
->force
)
137 connector
->funcs
->force(connector
);
139 connector
->status
= connector
->funcs
->detect(connector
, true);
142 /* Re-enable polling in case the global poll config changed. */
143 if (drm_kms_helper_poll
!= dev
->mode_config
.poll_running
)
144 drm_kms_helper_poll_enable(dev
);
146 dev
->mode_config
.poll_running
= drm_kms_helper_poll
;
148 if (connector
->status
== connector_status_disconnected
) {
149 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
150 connector
->base
.id
, drm_get_connector_name(connector
));
151 drm_mode_connector_update_edid_property(connector
, NULL
);
155 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
156 count
= drm_load_edid_firmware(connector
);
159 count
= (*connector_funcs
->get_modes
)(connector
);
161 if (count
== 0 && connector
->status
== connector_status_connected
)
162 count
= drm_add_modes_noedid(connector
, 1024, 768);
166 drm_mode_connector_list_update(connector
);
169 drm_mode_validate_size(dev
, &connector
->modes
, maxX
,
172 if (connector
->interlace_allowed
)
173 mode_flags
|= DRM_MODE_FLAG_INTERLACE
;
174 if (connector
->doublescan_allowed
)
175 mode_flags
|= DRM_MODE_FLAG_DBLSCAN
;
176 drm_mode_validate_flag(connector
, mode_flags
);
178 list_for_each_entry(mode
, &connector
->modes
, head
) {
179 if (mode
->status
== MODE_OK
)
180 mode
->status
= connector_funcs
->mode_valid(connector
,
185 drm_mode_prune_invalid(dev
, &connector
->modes
, true);
187 if (list_empty(&connector
->modes
))
190 drm_mode_sort(&connector
->modes
);
192 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector
->base
.id
,
193 drm_get_connector_name(connector
));
194 list_for_each_entry(mode
, &connector
->modes
, head
) {
195 mode
->vrefresh
= drm_mode_vrefresh(mode
);
197 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
198 drm_mode_debug_printmodeline(mode
);
203 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes
);
206 * drm_helper_encoder_in_use - check if a given encoder is in use
207 * @encoder: encoder to check
210 * Caller must hold mode config lock.
212 * Walk @encoders's DRM device's mode_config and see if it's in use.
215 * True if @encoder is part of the mode_config, false otherwise.
217 bool drm_helper_encoder_in_use(struct drm_encoder
*encoder
)
219 struct drm_connector
*connector
;
220 struct drm_device
*dev
= encoder
->dev
;
221 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
222 if (connector
->encoder
== encoder
)
226 EXPORT_SYMBOL(drm_helper_encoder_in_use
);
229 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
230 * @crtc: CRTC to check
233 * Caller must hold mode config lock.
235 * Walk @crtc's DRM device's mode_config and see if it's in use.
238 * True if @crtc is part of the mode_config, false otherwise.
240 bool drm_helper_crtc_in_use(struct drm_crtc
*crtc
)
242 struct drm_encoder
*encoder
;
243 struct drm_device
*dev
= crtc
->dev
;
244 /* FIXME: Locking around list access? */
245 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
)
246 if (encoder
->crtc
== crtc
&& drm_helper_encoder_in_use(encoder
))
250 EXPORT_SYMBOL(drm_helper_crtc_in_use
);
253 drm_encoder_disable(struct drm_encoder
*encoder
)
255 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
257 if (encoder_funcs
->disable
)
258 (*encoder_funcs
->disable
)(encoder
);
260 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
264 * drm_helper_disable_unused_functions - disable unused objects
268 * Caller must hold mode config lock.
270 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
271 * by calling its dpms function, which should power it off.
273 void drm_helper_disable_unused_functions(struct drm_device
*dev
)
275 struct drm_encoder
*encoder
;
276 struct drm_connector
*connector
;
277 struct drm_crtc
*crtc
;
279 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
280 if (!connector
->encoder
)
282 if (connector
->status
== connector_status_disconnected
)
283 connector
->encoder
= NULL
;
286 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
287 if (!drm_helper_encoder_in_use(encoder
)) {
288 drm_encoder_disable(encoder
);
289 /* disconnector encoder from any connector */
290 encoder
->crtc
= NULL
;
294 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
295 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
296 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
297 if (!crtc
->enabled
) {
298 if (crtc_funcs
->disable
)
299 (*crtc_funcs
->disable
)(crtc
);
301 (*crtc_funcs
->dpms
)(crtc
, DRM_MODE_DPMS_OFF
);
306 EXPORT_SYMBOL(drm_helper_disable_unused_functions
);
309 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
310 * @encoder: encoder to test
311 * @crtc: crtc to test
313 * Return false if @encoder can't be driven by @crtc, true otherwise.
315 static bool drm_encoder_crtc_ok(struct drm_encoder
*encoder
,
316 struct drm_crtc
*crtc
)
318 struct drm_device
*dev
;
319 struct drm_crtc
*tmp
;
322 WARN(!crtc
, "checking null crtc?\n");
326 list_for_each_entry(tmp
, &dev
->mode_config
.crtc_list
, head
) {
332 if (encoder
->possible_crtcs
& crtc_mask
)
338 * Check the CRTC we're going to map each output to vs. its current
339 * CRTC. If they don't match, we have to disable the output and the CRTC
340 * since the driver will have to re-route things.
343 drm_crtc_prepare_encoders(struct drm_device
*dev
)
345 struct drm_encoder_helper_funcs
*encoder_funcs
;
346 struct drm_encoder
*encoder
;
348 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
349 encoder_funcs
= encoder
->helper_private
;
350 /* Disable unused encoders */
351 if (encoder
->crtc
== NULL
)
352 drm_encoder_disable(encoder
);
353 /* Disable encoders whose CRTC is about to change */
354 if (encoder_funcs
->get_crtc
&&
355 encoder
->crtc
!= (*encoder_funcs
->get_crtc
)(encoder
))
356 drm_encoder_disable(encoder
);
361 * drm_crtc_helper_set_mode - internal helper to set a mode
362 * @crtc: CRTC to program
364 * @x: horizontal offset into the surface
365 * @y: vertical offset into the surface
366 * @old_fb: old framebuffer, for cleanup
369 * Caller must hold mode config lock.
371 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
372 * to fixup or reject the mode prior to trying to set it. This is an internal
373 * helper that drivers could e.g. use to update properties that require the
374 * entire output pipe to be disabled and re-enabled in a new configuration. For
375 * example for changing whether audio is enabled on a hdmi link or for changing
376 * panel fitter or dither attributes. It is also called by the
377 * drm_crtc_helper_set_config() helper function to drive the mode setting
381 * True if the mode was set successfully, or false otherwise.
383 bool drm_crtc_helper_set_mode(struct drm_crtc
*crtc
,
384 struct drm_display_mode
*mode
,
386 struct drm_framebuffer
*old_fb
)
388 struct drm_device
*dev
= crtc
->dev
;
389 struct drm_display_mode
*adjusted_mode
, saved_mode
, saved_hwmode
;
390 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
391 struct drm_encoder_helper_funcs
*encoder_funcs
;
392 int saved_x
, saved_y
;
393 struct drm_encoder
*encoder
;
396 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
400 adjusted_mode
= drm_mode_duplicate(dev
, mode
);
404 saved_hwmode
= crtc
->hwmode
;
405 saved_mode
= crtc
->mode
;
409 /* Update crtc values up front so the driver can rely on them for mode
416 /* Pass our mode to the connectors and the CRTC to give them a chance to
417 * adjust it according to limitations or connector properties, and also
418 * a chance to reject the mode entirely.
420 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
422 if (encoder
->crtc
!= crtc
)
424 encoder_funcs
= encoder
->helper_private
;
425 if (!(ret
= encoder_funcs
->mode_fixup(encoder
, mode
,
427 DRM_DEBUG_KMS("Encoder fixup failed\n");
432 if (!(ret
= crtc_funcs
->mode_fixup(crtc
, mode
, adjusted_mode
))) {
433 DRM_DEBUG_KMS("CRTC fixup failed\n");
436 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc
->base
.id
);
438 /* Prepare the encoders and CRTCs before setting the mode. */
439 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
441 if (encoder
->crtc
!= crtc
)
443 encoder_funcs
= encoder
->helper_private
;
444 /* Disable the encoders as the first thing we do. */
445 encoder_funcs
->prepare(encoder
);
448 drm_crtc_prepare_encoders(dev
);
450 crtc_funcs
->prepare(crtc
);
452 /* Set up the DPLL and any encoders state that needs to adjust or depend
455 ret
= !crtc_funcs
->mode_set(crtc
, mode
, adjusted_mode
, x
, y
, old_fb
);
459 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
461 if (encoder
->crtc
!= crtc
)
464 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
465 encoder
->base
.id
, drm_get_encoder_name(encoder
),
466 mode
->base
.id
, mode
->name
);
467 encoder_funcs
= encoder
->helper_private
;
468 encoder_funcs
->mode_set(encoder
, mode
, adjusted_mode
);
471 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
472 crtc_funcs
->commit(crtc
);
474 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
476 if (encoder
->crtc
!= crtc
)
479 encoder_funcs
= encoder
->helper_private
;
480 encoder_funcs
->commit(encoder
);
484 /* Store real post-adjustment hardware mode. */
485 crtc
->hwmode
= *adjusted_mode
;
487 /* Calculate and store various constants which
488 * are later needed by vblank and swap-completion
489 * timestamping. They are derived from true hwmode.
491 drm_calc_timestamping_constants(crtc
);
493 /* FIXME: add subpixel order */
495 drm_mode_destroy(dev
, adjusted_mode
);
497 crtc
->hwmode
= saved_hwmode
;
498 crtc
->mode
= saved_mode
;
505 EXPORT_SYMBOL(drm_crtc_helper_set_mode
);
509 drm_crtc_helper_disable(struct drm_crtc
*crtc
)
511 struct drm_device
*dev
= crtc
->dev
;
512 struct drm_connector
*connector
;
513 struct drm_encoder
*encoder
;
515 /* Decouple all encoders and their attached connectors from this crtc */
516 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
517 if (encoder
->crtc
!= crtc
)
520 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
521 if (connector
->encoder
!= encoder
)
524 connector
->encoder
= NULL
;
528 drm_helper_disable_unused_functions(dev
);
533 * drm_crtc_helper_set_config - set a new config from userspace
534 * @set: mode set configuration
537 * Caller must hold mode config lock.
539 * Setup a new configuration, provided by the upper layers (either an ioctl call
540 * from userspace or internally e.g. from the fbdev suppport code) in @set, and
541 * enable it. This is the main helper functions for drivers that implement
542 * kernel mode setting with the crtc helper functions and the assorted
543 * ->prepare(), ->modeset() and ->commit() helper callbacks.
546 * Returns 0 on success, -ERRNO on failure.
548 int drm_crtc_helper_set_config(struct drm_mode_set
*set
)
550 struct drm_device
*dev
;
551 struct drm_crtc
*save_crtcs
, *new_crtc
, *crtc
;
552 struct drm_encoder
*save_encoders
, *new_encoder
, *encoder
;
553 struct drm_framebuffer
*old_fb
= NULL
;
554 bool mode_changed
= false; /* if true do a full mode set */
555 bool fb_changed
= false; /* if true and !mode_changed just do a flip */
556 struct drm_connector
*save_connectors
, *connector
;
557 int count
= 0, ro
, fail
= 0;
558 struct drm_crtc_helper_funcs
*crtc_funcs
;
559 struct drm_mode_set save_set
;
571 if (!set
->crtc
->helper_private
)
574 crtc_funcs
= set
->crtc
->helper_private
;
580 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
581 set
->crtc
->base
.id
, set
->fb
->base
.id
,
582 (int)set
->num_connectors
, set
->x
, set
->y
);
584 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set
->crtc
->base
.id
);
585 return drm_crtc_helper_disable(set
->crtc
);
588 dev
= set
->crtc
->dev
;
590 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
592 save_crtcs
= kzalloc(dev
->mode_config
.num_crtc
*
593 sizeof(struct drm_crtc
), GFP_KERNEL
);
597 save_encoders
= kzalloc(dev
->mode_config
.num_encoder
*
598 sizeof(struct drm_encoder
), GFP_KERNEL
);
599 if (!save_encoders
) {
604 save_connectors
= kzalloc(dev
->mode_config
.num_connector
*
605 sizeof(struct drm_connector
), GFP_KERNEL
);
606 if (!save_connectors
) {
608 kfree(save_encoders
);
612 /* Copy data. Note that driver private data is not affected.
613 * Should anything bad happen only the expected state is
614 * restored, not the drivers personal bookkeeping.
617 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
618 save_crtcs
[count
++] = *crtc
;
622 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
623 save_encoders
[count
++] = *encoder
;
627 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
628 save_connectors
[count
++] = *connector
;
631 save_set
.crtc
= set
->crtc
;
632 save_set
.mode
= &set
->crtc
->mode
;
633 save_set
.x
= set
->crtc
->x
;
634 save_set
.y
= set
->crtc
->y
;
635 save_set
.fb
= set
->crtc
->fb
;
637 /* We should be able to check here if the fb has the same properties
638 * and then just flip_or_move it */
639 if (set
->crtc
->fb
!= set
->fb
) {
640 /* If we have no fb then treat it as a full mode set */
641 if (set
->crtc
->fb
== NULL
) {
642 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
644 } else if (set
->fb
== NULL
) {
646 } else if (set
->fb
->depth
!= set
->crtc
->fb
->depth
) {
648 } else if (set
->fb
->bits_per_pixel
!=
649 set
->crtc
->fb
->bits_per_pixel
) {
655 if (set
->x
!= set
->crtc
->x
|| set
->y
!= set
->crtc
->y
)
658 if (set
->mode
&& !drm_mode_equal(set
->mode
, &set
->crtc
->mode
)) {
659 DRM_DEBUG_KMS("modes are different, full mode set\n");
660 drm_mode_debug_printmodeline(&set
->crtc
->mode
);
661 drm_mode_debug_printmodeline(set
->mode
);
665 /* a) traverse passed in connector list and get encoders for them */
667 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
668 struct drm_connector_helper_funcs
*connector_funcs
=
669 connector
->helper_private
;
670 new_encoder
= connector
->encoder
;
671 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
672 if (set
->connectors
[ro
] == connector
) {
673 new_encoder
= connector_funcs
->best_encoder(connector
);
674 /* if we can't get an encoder for a connector
675 we are setting now - then fail */
676 if (new_encoder
== NULL
)
677 /* don't break so fail path works correct */
683 if (new_encoder
!= connector
->encoder
) {
684 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
686 /* If the encoder is reused for another connector, then
687 * the appropriate crtc will be set later.
689 if (connector
->encoder
)
690 connector
->encoder
->crtc
= NULL
;
691 connector
->encoder
= new_encoder
;
701 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
702 if (!connector
->encoder
)
705 if (connector
->encoder
->crtc
== set
->crtc
)
708 new_crtc
= connector
->encoder
->crtc
;
710 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
711 if (set
->connectors
[ro
] == connector
)
712 new_crtc
= set
->crtc
;
715 /* Make sure the new CRTC will work with the encoder */
717 !drm_encoder_crtc_ok(connector
->encoder
, new_crtc
)) {
721 if (new_crtc
!= connector
->encoder
->crtc
) {
722 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
724 connector
->encoder
->crtc
= new_crtc
;
727 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
728 connector
->base
.id
, drm_get_connector_name(connector
),
731 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
732 connector
->base
.id
, drm_get_connector_name(connector
));
736 /* mode_set_base is not a required function */
737 if (fb_changed
&& !crtc_funcs
->mode_set_base
)
741 set
->crtc
->enabled
= drm_helper_crtc_in_use(set
->crtc
);
742 if (set
->crtc
->enabled
) {
743 DRM_DEBUG_KMS("attempting to set mode from"
745 drm_mode_debug_printmodeline(set
->mode
);
746 old_fb
= set
->crtc
->fb
;
747 set
->crtc
->fb
= set
->fb
;
748 if (!drm_crtc_helper_set_mode(set
->crtc
, set
->mode
,
751 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
753 set
->crtc
->fb
= old_fb
;
757 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
758 for (i
= 0; i
< set
->num_connectors
; i
++) {
759 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set
->connectors
[i
]->base
.id
,
760 drm_get_connector_name(set
->connectors
[i
]));
761 set
->connectors
[i
]->funcs
->dpms(set
->connectors
[i
], DRM_MODE_DPMS_ON
);
764 drm_helper_disable_unused_functions(dev
);
765 } else if (fb_changed
) {
766 set
->crtc
->x
= set
->x
;
767 set
->crtc
->y
= set
->y
;
769 old_fb
= set
->crtc
->fb
;
770 if (set
->crtc
->fb
!= set
->fb
)
771 set
->crtc
->fb
= set
->fb
;
772 ret
= crtc_funcs
->mode_set_base(set
->crtc
,
773 set
->x
, set
->y
, old_fb
);
775 set
->crtc
->fb
= old_fb
;
780 kfree(save_connectors
);
781 kfree(save_encoders
);
786 /* Restore all previous data. */
788 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
789 *crtc
= save_crtcs
[count
++];
793 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
794 *encoder
= save_encoders
[count
++];
798 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
799 *connector
= save_connectors
[count
++];
802 /* Try to restore the config */
804 !drm_crtc_helper_set_mode(save_set
.crtc
, save_set
.mode
, save_set
.x
,
805 save_set
.y
, save_set
.fb
))
806 DRM_ERROR("failed to restore config after modeset failure\n");
808 kfree(save_connectors
);
809 kfree(save_encoders
);
813 EXPORT_SYMBOL(drm_crtc_helper_set_config
);
815 static int drm_helper_choose_encoder_dpms(struct drm_encoder
*encoder
)
817 int dpms
= DRM_MODE_DPMS_OFF
;
818 struct drm_connector
*connector
;
819 struct drm_device
*dev
= encoder
->dev
;
821 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
822 if (connector
->encoder
== encoder
)
823 if (connector
->dpms
< dpms
)
824 dpms
= connector
->dpms
;
828 static int drm_helper_choose_crtc_dpms(struct drm_crtc
*crtc
)
830 int dpms
= DRM_MODE_DPMS_OFF
;
831 struct drm_connector
*connector
;
832 struct drm_device
*dev
= crtc
->dev
;
834 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
835 if (connector
->encoder
&& connector
->encoder
->crtc
== crtc
)
836 if (connector
->dpms
< dpms
)
837 dpms
= connector
->dpms
;
842 * drm_helper_connector_dpms() - connector dpms helper implementation
843 * @connector: affected connector
846 * This is the main helper function provided by the crtc helper framework for
847 * implementing the DPMS connector attribute. It computes the new desired DPMS
848 * state for all encoders and crtcs in the output mesh and calls the ->dpms()
849 * callback provided by the driver appropriately.
851 void drm_helper_connector_dpms(struct drm_connector
*connector
, int mode
)
853 struct drm_encoder
*encoder
= connector
->encoder
;
854 struct drm_crtc
*crtc
= encoder
? encoder
->crtc
: NULL
;
857 if (mode
== connector
->dpms
)
860 old_dpms
= connector
->dpms
;
861 connector
->dpms
= mode
;
863 /* from off to on, do crtc then encoder */
864 if (mode
< old_dpms
) {
866 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
867 if (crtc_funcs
->dpms
)
868 (*crtc_funcs
->dpms
) (crtc
,
869 drm_helper_choose_crtc_dpms(crtc
));
872 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
873 if (encoder_funcs
->dpms
)
874 (*encoder_funcs
->dpms
) (encoder
,
875 drm_helper_choose_encoder_dpms(encoder
));
879 /* from on to off, do encoder then crtc */
880 if (mode
> old_dpms
) {
882 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
883 if (encoder_funcs
->dpms
)
884 (*encoder_funcs
->dpms
) (encoder
,
885 drm_helper_choose_encoder_dpms(encoder
));
888 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
889 if (crtc_funcs
->dpms
)
890 (*crtc_funcs
->dpms
) (crtc
,
891 drm_helper_choose_crtc_dpms(crtc
));
897 EXPORT_SYMBOL(drm_helper_connector_dpms
);
899 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer
*fb
,
900 struct drm_mode_fb_cmd2
*mode_cmd
)
904 fb
->width
= mode_cmd
->width
;
905 fb
->height
= mode_cmd
->height
;
906 for (i
= 0; i
< 4; i
++) {
907 fb
->pitches
[i
] = mode_cmd
->pitches
[i
];
908 fb
->offsets
[i
] = mode_cmd
->offsets
[i
];
910 drm_fb_get_bpp_depth(mode_cmd
->pixel_format
, &fb
->depth
,
911 &fb
->bits_per_pixel
);
912 fb
->pixel_format
= mode_cmd
->pixel_format
;
916 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct
);
918 int drm_helper_resume_force_mode(struct drm_device
*dev
)
920 struct drm_crtc
*crtc
;
921 struct drm_encoder
*encoder
;
922 struct drm_encoder_helper_funcs
*encoder_funcs
;
923 struct drm_crtc_helper_funcs
*crtc_funcs
;
926 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
931 ret
= drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
932 crtc
->x
, crtc
->y
, crtc
->fb
);
935 DRM_ERROR("failed to set mode on crtc %p\n", crtc
);
937 /* Turn off outputs that were already powered off */
938 if (drm_helper_choose_crtc_dpms(crtc
)) {
939 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
941 if(encoder
->crtc
!= crtc
)
944 encoder_funcs
= encoder
->helper_private
;
945 if (encoder_funcs
->dpms
)
946 (*encoder_funcs
->dpms
) (encoder
,
947 drm_helper_choose_encoder_dpms(encoder
));
950 crtc_funcs
= crtc
->helper_private
;
951 if (crtc_funcs
->dpms
)
952 (*crtc_funcs
->dpms
) (crtc
,
953 drm_helper_choose_crtc_dpms(crtc
));
956 /* disable the unused connectors while restoring the modesetting */
957 drm_helper_disable_unused_functions(dev
);
960 EXPORT_SYMBOL(drm_helper_resume_force_mode
);
962 void drm_kms_helper_hotplug_event(struct drm_device
*dev
)
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
);
969 EXPORT_SYMBOL(drm_kms_helper_hotplug_event
);
971 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
972 static void output_poll_execute(struct work_struct
*work
)
974 struct delayed_work
*delayed_work
= to_delayed_work(work
);
975 struct drm_device
*dev
= container_of(delayed_work
, struct drm_device
, mode_config
.output_poll_work
);
976 struct drm_connector
*connector
;
977 enum drm_connector_status old_status
;
978 bool repoll
= false, changed
= false;
980 if (!drm_kms_helper_poll
)
983 mutex_lock(&dev
->mode_config
.mutex
);
984 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
986 /* Ignore forced connectors. */
987 if (connector
->force
)
990 /* Ignore HPD capable connectors and connectors where we don't
991 * want any hotplug detection at all for polling. */
992 if (!connector
->polled
|| connector
->polled
== DRM_CONNECTOR_POLL_HPD
)
997 old_status
= connector
->status
;
998 /* if we are connected and don't want to poll for disconnect
1000 if (old_status
== connector_status_connected
&&
1001 !(connector
->polled
& DRM_CONNECTOR_POLL_DISCONNECT
))
1004 connector
->status
= connector
->funcs
->detect(connector
, false);
1005 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
1007 drm_get_connector_name(connector
),
1008 old_status
, connector
->status
);
1009 if (old_status
!= connector
->status
)
1013 mutex_unlock(&dev
->mode_config
.mutex
);
1016 drm_kms_helper_hotplug_event(dev
);
1019 schedule_delayed_work(delayed_work
, DRM_OUTPUT_POLL_PERIOD
);
1022 void drm_kms_helper_poll_disable(struct drm_device
*dev
)
1024 if (!dev
->mode_config
.poll_enabled
)
1026 cancel_delayed_work_sync(&dev
->mode_config
.output_poll_work
);
1028 EXPORT_SYMBOL(drm_kms_helper_poll_disable
);
1030 void drm_kms_helper_poll_enable(struct drm_device
*dev
)
1033 struct drm_connector
*connector
;
1035 if (!dev
->mode_config
.poll_enabled
|| !drm_kms_helper_poll
)
1038 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1039 if (connector
->polled
& (DRM_CONNECTOR_POLL_CONNECT
|
1040 DRM_CONNECTOR_POLL_DISCONNECT
))
1045 schedule_delayed_work(&dev
->mode_config
.output_poll_work
, DRM_OUTPUT_POLL_PERIOD
);
1047 EXPORT_SYMBOL(drm_kms_helper_poll_enable
);
1049 void drm_kms_helper_poll_init(struct drm_device
*dev
)
1051 INIT_DELAYED_WORK(&dev
->mode_config
.output_poll_work
, output_poll_execute
);
1052 dev
->mode_config
.poll_enabled
= true;
1054 drm_kms_helper_poll_enable(dev
);
1056 EXPORT_SYMBOL(drm_kms_helper_poll_init
);
1058 void drm_kms_helper_poll_fini(struct drm_device
*dev
)
1060 drm_kms_helper_poll_disable(dev
);
1062 EXPORT_SYMBOL(drm_kms_helper_poll_fini
);
1064 void drm_helper_hpd_irq_event(struct drm_device
*dev
)
1066 struct drm_connector
*connector
;
1067 enum drm_connector_status old_status
;
1068 bool changed
= false;
1070 if (!dev
->mode_config
.poll_enabled
)
1073 mutex_lock(&dev
->mode_config
.mutex
);
1074 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1076 /* Only handle HPD capable connectors. */
1077 if (!(connector
->polled
& DRM_CONNECTOR_POLL_HPD
))
1080 old_status
= connector
->status
;
1082 connector
->status
= connector
->funcs
->detect(connector
, false);
1083 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
1085 drm_get_connector_name(connector
),
1086 old_status
, connector
->status
);
1087 if (old_status
!= connector
->status
)
1091 mutex_unlock(&dev
->mode_config
.mutex
);
1094 drm_kms_helper_hotplug_event(dev
);
1096 EXPORT_SYMBOL(drm_helper_hpd_irq_event
);