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
;
124 bool verbose_prune
= true;
125 enum drm_connector_status old_status
;
127 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector
->base
.id
,
128 drm_get_connector_name(connector
));
129 /* set all modes to the unverified state */
130 list_for_each_entry(mode
, &connector
->modes
, head
)
131 mode
->status
= MODE_UNVERIFIED
;
133 if (connector
->force
) {
134 if (connector
->force
== DRM_FORCE_ON
)
135 connector
->status
= connector_status_connected
;
137 connector
->status
= connector_status_disconnected
;
138 if (connector
->funcs
->force
)
139 connector
->funcs
->force(connector
);
141 old_status
= connector
->status
;
143 connector
->status
= connector
->funcs
->detect(connector
, true);
146 * Normally either the driver's hpd code or the poll loop should
147 * pick up any changes and fire the hotplug event. But if
148 * userspace sneaks in a probe, we might miss a change. Hence
149 * check here, and if anything changed start the hotplug code.
151 if (old_status
!= connector
->status
) {
152 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
154 drm_get_connector_name(connector
),
155 old_status
, connector
->status
);
158 * The hotplug event code might call into the fb
159 * helpers, and so expects that we do not hold any
160 * locks. Fire up the poll struct instead, it will
161 * disable itself again.
163 dev
->mode_config
.delayed_event
= true;
164 schedule_delayed_work(&dev
->mode_config
.output_poll_work
,
169 /* Re-enable polling in case the global poll config changed. */
170 if (drm_kms_helper_poll
!= dev
->mode_config
.poll_running
)
171 drm_kms_helper_poll_enable(dev
);
173 dev
->mode_config
.poll_running
= drm_kms_helper_poll
;
175 if (connector
->status
== connector_status_disconnected
) {
176 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
177 connector
->base
.id
, drm_get_connector_name(connector
));
178 drm_mode_connector_update_edid_property(connector
, NULL
);
179 verbose_prune
= false;
183 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
184 count
= drm_load_edid_firmware(connector
);
187 count
= (*connector_funcs
->get_modes
)(connector
);
189 if (count
== 0 && connector
->status
== connector_status_connected
)
190 count
= drm_add_modes_noedid(connector
, 1024, 768);
194 drm_mode_connector_list_update(connector
);
197 drm_mode_validate_size(dev
, &connector
->modes
, maxX
,
200 if (connector
->interlace_allowed
)
201 mode_flags
|= DRM_MODE_FLAG_INTERLACE
;
202 if (connector
->doublescan_allowed
)
203 mode_flags
|= DRM_MODE_FLAG_DBLSCAN
;
204 drm_mode_validate_flag(connector
, mode_flags
);
206 list_for_each_entry(mode
, &connector
->modes
, head
) {
207 if (mode
->status
== MODE_OK
)
208 mode
->status
= connector_funcs
->mode_valid(connector
,
213 drm_mode_prune_invalid(dev
, &connector
->modes
, verbose_prune
);
215 if (list_empty(&connector
->modes
))
218 list_for_each_entry(mode
, &connector
->modes
, head
)
219 mode
->vrefresh
= drm_mode_vrefresh(mode
);
221 drm_mode_sort(&connector
->modes
);
223 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector
->base
.id
,
224 drm_get_connector_name(connector
));
225 list_for_each_entry(mode
, &connector
->modes
, head
) {
226 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
227 drm_mode_debug_printmodeline(mode
);
232 EXPORT_SYMBOL(drm_helper_probe_single_connector_modes
);
235 * drm_helper_encoder_in_use - check if a given encoder is in use
236 * @encoder: encoder to check
239 * Caller must hold mode config lock.
241 * Walk @encoders's DRM device's mode_config and see if it's in use.
244 * True if @encoder is part of the mode_config, false otherwise.
246 bool drm_helper_encoder_in_use(struct drm_encoder
*encoder
)
248 struct drm_connector
*connector
;
249 struct drm_device
*dev
= encoder
->dev
;
250 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
251 if (connector
->encoder
== encoder
)
255 EXPORT_SYMBOL(drm_helper_encoder_in_use
);
258 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
259 * @crtc: CRTC to check
262 * Caller must hold mode config lock.
264 * Walk @crtc's DRM device's mode_config and see if it's in use.
267 * True if @crtc is part of the mode_config, false otherwise.
269 bool drm_helper_crtc_in_use(struct drm_crtc
*crtc
)
271 struct drm_encoder
*encoder
;
272 struct drm_device
*dev
= crtc
->dev
;
273 /* FIXME: Locking around list access? */
274 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
)
275 if (encoder
->crtc
== crtc
&& drm_helper_encoder_in_use(encoder
))
279 EXPORT_SYMBOL(drm_helper_crtc_in_use
);
282 drm_encoder_disable(struct drm_encoder
*encoder
)
284 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
286 if (encoder_funcs
->disable
)
287 (*encoder_funcs
->disable
)(encoder
);
289 (*encoder_funcs
->dpms
)(encoder
, DRM_MODE_DPMS_OFF
);
293 * drm_helper_disable_unused_functions - disable unused objects
297 * Caller must hold mode config lock.
299 * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
300 * by calling its dpms function, which should power it off.
302 void drm_helper_disable_unused_functions(struct drm_device
*dev
)
304 struct drm_encoder
*encoder
;
305 struct drm_connector
*connector
;
306 struct drm_crtc
*crtc
;
308 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
309 if (!connector
->encoder
)
311 if (connector
->status
== connector_status_disconnected
)
312 connector
->encoder
= NULL
;
315 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
316 if (!drm_helper_encoder_in_use(encoder
)) {
317 drm_encoder_disable(encoder
);
318 /* disconnector encoder from any connector */
319 encoder
->crtc
= NULL
;
323 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
324 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
325 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
326 if (!crtc
->enabled
) {
327 if (crtc_funcs
->disable
)
328 (*crtc_funcs
->disable
)(crtc
);
330 (*crtc_funcs
->dpms
)(crtc
, DRM_MODE_DPMS_OFF
);
335 EXPORT_SYMBOL(drm_helper_disable_unused_functions
);
338 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
339 * @encoder: encoder to test
340 * @crtc: crtc to test
342 * Return false if @encoder can't be driven by @crtc, true otherwise.
344 static bool drm_encoder_crtc_ok(struct drm_encoder
*encoder
,
345 struct drm_crtc
*crtc
)
347 struct drm_device
*dev
;
348 struct drm_crtc
*tmp
;
351 WARN(!crtc
, "checking null crtc?\n");
355 list_for_each_entry(tmp
, &dev
->mode_config
.crtc_list
, head
) {
361 if (encoder
->possible_crtcs
& crtc_mask
)
367 * Check the CRTC we're going to map each output to vs. its current
368 * CRTC. If they don't match, we have to disable the output and the CRTC
369 * since the driver will have to re-route things.
372 drm_crtc_prepare_encoders(struct drm_device
*dev
)
374 struct drm_encoder_helper_funcs
*encoder_funcs
;
375 struct drm_encoder
*encoder
;
377 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
378 encoder_funcs
= encoder
->helper_private
;
379 /* Disable unused encoders */
380 if (encoder
->crtc
== NULL
)
381 drm_encoder_disable(encoder
);
382 /* Disable encoders whose CRTC is about to change */
383 if (encoder_funcs
->get_crtc
&&
384 encoder
->crtc
!= (*encoder_funcs
->get_crtc
)(encoder
))
385 drm_encoder_disable(encoder
);
390 * drm_crtc_helper_set_mode - internal helper to set a mode
391 * @crtc: CRTC to program
393 * @x: horizontal offset into the surface
394 * @y: vertical offset into the surface
395 * @old_fb: old framebuffer, for cleanup
398 * Caller must hold mode config lock.
400 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
401 * to fixup or reject the mode prior to trying to set it. This is an internal
402 * helper that drivers could e.g. use to update properties that require the
403 * entire output pipe to be disabled and re-enabled in a new configuration. For
404 * example for changing whether audio is enabled on a hdmi link or for changing
405 * panel fitter or dither attributes. It is also called by the
406 * drm_crtc_helper_set_config() helper function to drive the mode setting
410 * True if the mode was set successfully, or false otherwise.
412 bool drm_crtc_helper_set_mode(struct drm_crtc
*crtc
,
413 struct drm_display_mode
*mode
,
415 struct drm_framebuffer
*old_fb
)
417 struct drm_device
*dev
= crtc
->dev
;
418 struct drm_display_mode
*adjusted_mode
, saved_mode
, saved_hwmode
;
419 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
420 struct drm_encoder_helper_funcs
*encoder_funcs
;
421 int saved_x
, saved_y
;
422 struct drm_encoder
*encoder
;
425 crtc
->enabled
= drm_helper_crtc_in_use(crtc
);
429 adjusted_mode
= drm_mode_duplicate(dev
, mode
);
433 saved_hwmode
= crtc
->hwmode
;
434 saved_mode
= crtc
->mode
;
438 /* Update crtc values up front so the driver can rely on them for mode
445 /* Pass our mode to the connectors and the CRTC to give them a chance to
446 * adjust it according to limitations or connector properties, and also
447 * a chance to reject the mode entirely.
449 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
451 if (encoder
->crtc
!= crtc
)
453 encoder_funcs
= encoder
->helper_private
;
454 if (!(ret
= encoder_funcs
->mode_fixup(encoder
, mode
,
456 DRM_DEBUG_KMS("Encoder fixup failed\n");
461 if (!(ret
= crtc_funcs
->mode_fixup(crtc
, mode
, adjusted_mode
))) {
462 DRM_DEBUG_KMS("CRTC fixup failed\n");
465 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc
->base
.id
);
467 /* Prepare the encoders and CRTCs before setting the mode. */
468 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
470 if (encoder
->crtc
!= crtc
)
472 encoder_funcs
= encoder
->helper_private
;
473 /* Disable the encoders as the first thing we do. */
474 encoder_funcs
->prepare(encoder
);
477 drm_crtc_prepare_encoders(dev
);
479 crtc_funcs
->prepare(crtc
);
481 /* Set up the DPLL and any encoders state that needs to adjust or depend
484 ret
= !crtc_funcs
->mode_set(crtc
, mode
, adjusted_mode
, x
, y
, old_fb
);
488 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
490 if (encoder
->crtc
!= crtc
)
493 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
494 encoder
->base
.id
, drm_get_encoder_name(encoder
),
495 mode
->base
.id
, mode
->name
);
496 encoder_funcs
= encoder
->helper_private
;
497 encoder_funcs
->mode_set(encoder
, mode
, adjusted_mode
);
500 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
501 crtc_funcs
->commit(crtc
);
503 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
505 if (encoder
->crtc
!= crtc
)
508 encoder_funcs
= encoder
->helper_private
;
509 encoder_funcs
->commit(encoder
);
513 /* Store real post-adjustment hardware mode. */
514 crtc
->hwmode
= *adjusted_mode
;
516 /* Calculate and store various constants which
517 * are later needed by vblank and swap-completion
518 * timestamping. They are derived from true hwmode.
520 drm_calc_timestamping_constants(crtc
);
522 /* FIXME: add subpixel order */
524 drm_mode_destroy(dev
, adjusted_mode
);
526 crtc
->hwmode
= saved_hwmode
;
527 crtc
->mode
= saved_mode
;
534 EXPORT_SYMBOL(drm_crtc_helper_set_mode
);
538 drm_crtc_helper_disable(struct drm_crtc
*crtc
)
540 struct drm_device
*dev
= crtc
->dev
;
541 struct drm_connector
*connector
;
542 struct drm_encoder
*encoder
;
544 /* Decouple all encoders and their attached connectors from this crtc */
545 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
546 if (encoder
->crtc
!= crtc
)
549 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
550 if (connector
->encoder
!= encoder
)
553 connector
->encoder
= NULL
;
557 drm_helper_disable_unused_functions(dev
);
562 * drm_crtc_helper_set_config - set a new config from userspace
563 * @set: mode set configuration
566 * Caller must hold mode config lock.
568 * Setup a new configuration, provided by the upper layers (either an ioctl call
569 * from userspace or internally e.g. from the fbdev suppport code) in @set, and
570 * enable it. This is the main helper functions for drivers that implement
571 * kernel mode setting with the crtc helper functions and the assorted
572 * ->prepare(), ->modeset() and ->commit() helper callbacks.
575 * Returns 0 on success, -ERRNO on failure.
577 int drm_crtc_helper_set_config(struct drm_mode_set
*set
)
579 struct drm_device
*dev
;
580 struct drm_crtc
*save_crtcs
, *new_crtc
, *crtc
;
581 struct drm_encoder
*save_encoders
, *new_encoder
, *encoder
;
582 struct drm_framebuffer
*old_fb
= NULL
;
583 bool mode_changed
= false; /* if true do a full mode set */
584 bool fb_changed
= false; /* if true and !mode_changed just do a flip */
585 struct drm_connector
*save_connectors
, *connector
;
586 int count
= 0, ro
, fail
= 0;
587 struct drm_crtc_helper_funcs
*crtc_funcs
;
588 struct drm_mode_set save_set
;
596 BUG_ON(!set
->crtc
->helper_private
);
598 /* Enforce sane interface api - has been abused by the fb helper. */
599 BUG_ON(!set
->mode
&& set
->fb
);
600 BUG_ON(set
->fb
&& set
->num_connectors
== 0);
602 crtc_funcs
= set
->crtc
->helper_private
;
608 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
609 set
->crtc
->base
.id
, set
->fb
->base
.id
,
610 (int)set
->num_connectors
, set
->x
, set
->y
);
612 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set
->crtc
->base
.id
);
613 return drm_crtc_helper_disable(set
->crtc
);
616 dev
= set
->crtc
->dev
;
618 /* Allocate space for the backup of all (non-pointer) crtc, encoder and
620 save_crtcs
= kzalloc(dev
->mode_config
.num_crtc
*
621 sizeof(struct drm_crtc
), GFP_KERNEL
);
625 save_encoders
= kzalloc(dev
->mode_config
.num_encoder
*
626 sizeof(struct drm_encoder
), GFP_KERNEL
);
627 if (!save_encoders
) {
632 save_connectors
= kzalloc(dev
->mode_config
.num_connector
*
633 sizeof(struct drm_connector
), GFP_KERNEL
);
634 if (!save_connectors
) {
636 kfree(save_encoders
);
640 /* Copy data. Note that driver private data is not affected.
641 * Should anything bad happen only the expected state is
642 * restored, not the drivers personal bookkeeping.
645 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
646 save_crtcs
[count
++] = *crtc
;
650 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
651 save_encoders
[count
++] = *encoder
;
655 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
656 save_connectors
[count
++] = *connector
;
659 save_set
.crtc
= set
->crtc
;
660 save_set
.mode
= &set
->crtc
->mode
;
661 save_set
.x
= set
->crtc
->x
;
662 save_set
.y
= set
->crtc
->y
;
663 save_set
.fb
= set
->crtc
->fb
;
665 /* We should be able to check here if the fb has the same properties
666 * and then just flip_or_move it */
667 if (set
->crtc
->fb
!= set
->fb
) {
668 /* If we have no fb then treat it as a full mode set */
669 if (set
->crtc
->fb
== NULL
) {
670 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
672 } else if (set
->fb
== NULL
) {
674 } else if (set
->fb
->pixel_format
!=
675 set
->crtc
->fb
->pixel_format
) {
681 if (set
->x
!= set
->crtc
->x
|| set
->y
!= set
->crtc
->y
)
684 if (set
->mode
&& !drm_mode_equal(set
->mode
, &set
->crtc
->mode
)) {
685 DRM_DEBUG_KMS("modes are different, full mode set\n");
686 drm_mode_debug_printmodeline(&set
->crtc
->mode
);
687 drm_mode_debug_printmodeline(set
->mode
);
691 /* a) traverse passed in connector list and get encoders for them */
693 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
694 struct drm_connector_helper_funcs
*connector_funcs
=
695 connector
->helper_private
;
696 new_encoder
= connector
->encoder
;
697 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
698 if (set
->connectors
[ro
] == connector
) {
699 new_encoder
= connector_funcs
->best_encoder(connector
);
700 /* if we can't get an encoder for a connector
701 we are setting now - then fail */
702 if (new_encoder
== NULL
)
703 /* don't break so fail path works correct */
709 if (new_encoder
!= connector
->encoder
) {
710 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
712 /* If the encoder is reused for another connector, then
713 * the appropriate crtc will be set later.
715 if (connector
->encoder
)
716 connector
->encoder
->crtc
= NULL
;
717 connector
->encoder
= new_encoder
;
727 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
728 if (!connector
->encoder
)
731 if (connector
->encoder
->crtc
== set
->crtc
)
734 new_crtc
= connector
->encoder
->crtc
;
736 for (ro
= 0; ro
< set
->num_connectors
; ro
++) {
737 if (set
->connectors
[ro
] == connector
)
738 new_crtc
= set
->crtc
;
741 /* Make sure the new CRTC will work with the encoder */
743 !drm_encoder_crtc_ok(connector
->encoder
, new_crtc
)) {
747 if (new_crtc
!= connector
->encoder
->crtc
) {
748 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
750 connector
->encoder
->crtc
= new_crtc
;
753 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
754 connector
->base
.id
, drm_get_connector_name(connector
),
757 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
758 connector
->base
.id
, drm_get_connector_name(connector
));
762 /* mode_set_base is not a required function */
763 if (fb_changed
&& !crtc_funcs
->mode_set_base
)
767 set
->crtc
->enabled
= drm_helper_crtc_in_use(set
->crtc
);
768 if (set
->crtc
->enabled
) {
769 DRM_DEBUG_KMS("attempting to set mode from"
771 drm_mode_debug_printmodeline(set
->mode
);
772 old_fb
= set
->crtc
->fb
;
773 set
->crtc
->fb
= set
->fb
;
774 if (!drm_crtc_helper_set_mode(set
->crtc
, set
->mode
,
777 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
779 set
->crtc
->fb
= old_fb
;
784 drm_helper_disable_unused_functions(dev
);
785 } else if (fb_changed
) {
786 set
->crtc
->x
= set
->x
;
787 set
->crtc
->y
= set
->y
;
789 old_fb
= set
->crtc
->fb
;
790 if (set
->crtc
->fb
!= set
->fb
)
791 set
->crtc
->fb
= set
->fb
;
792 ret
= crtc_funcs
->mode_set_base(set
->crtc
,
793 set
->x
, set
->y
, old_fb
);
795 set
->crtc
->fb
= old_fb
;
801 * crtc set_config helpers implicit set the crtc and all connected
802 * encoders to DPMS on for a full mode set. But for just an fb update it
803 * doesn't do that. To not confuse userspace, do an explicit DPMS_ON
804 * unconditionally. This will also ensure driver internal dpms state is
807 if (set
->crtc
->enabled
) {
808 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
809 for (i
= 0; i
< set
->num_connectors
; i
++) {
810 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set
->connectors
[i
]->base
.id
,
811 drm_get_connector_name(set
->connectors
[i
]));
812 set
->connectors
[i
]->funcs
->dpms(set
->connectors
[i
], DRM_MODE_DPMS_ON
);
816 kfree(save_connectors
);
817 kfree(save_encoders
);
822 /* Restore all previous data. */
824 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
825 *crtc
= save_crtcs
[count
++];
829 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
830 *encoder
= save_encoders
[count
++];
834 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
835 *connector
= save_connectors
[count
++];
838 /* Try to restore the config */
840 !drm_crtc_helper_set_mode(save_set
.crtc
, save_set
.mode
, save_set
.x
,
841 save_set
.y
, save_set
.fb
))
842 DRM_ERROR("failed to restore config after modeset failure\n");
844 kfree(save_connectors
);
845 kfree(save_encoders
);
849 EXPORT_SYMBOL(drm_crtc_helper_set_config
);
851 static int drm_helper_choose_encoder_dpms(struct drm_encoder
*encoder
)
853 int dpms
= DRM_MODE_DPMS_OFF
;
854 struct drm_connector
*connector
;
855 struct drm_device
*dev
= encoder
->dev
;
857 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
858 if (connector
->encoder
== encoder
)
859 if (connector
->dpms
< dpms
)
860 dpms
= connector
->dpms
;
864 static int drm_helper_choose_crtc_dpms(struct drm_crtc
*crtc
)
866 int dpms
= DRM_MODE_DPMS_OFF
;
867 struct drm_connector
*connector
;
868 struct drm_device
*dev
= crtc
->dev
;
870 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
)
871 if (connector
->encoder
&& connector
->encoder
->crtc
== crtc
)
872 if (connector
->dpms
< dpms
)
873 dpms
= connector
->dpms
;
878 * drm_helper_connector_dpms() - connector dpms helper implementation
879 * @connector: affected connector
882 * This is the main helper function provided by the crtc helper framework for
883 * implementing the DPMS connector attribute. It computes the new desired DPMS
884 * state for all encoders and crtcs in the output mesh and calls the ->dpms()
885 * callback provided by the driver appropriately.
887 void drm_helper_connector_dpms(struct drm_connector
*connector
, int mode
)
889 struct drm_encoder
*encoder
= connector
->encoder
;
890 struct drm_crtc
*crtc
= encoder
? encoder
->crtc
: NULL
;
893 if (mode
== connector
->dpms
)
896 old_dpms
= connector
->dpms
;
897 connector
->dpms
= mode
;
899 /* from off to on, do crtc then encoder */
900 if (mode
< old_dpms
) {
902 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
903 if (crtc_funcs
->dpms
)
904 (*crtc_funcs
->dpms
) (crtc
,
905 drm_helper_choose_crtc_dpms(crtc
));
908 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
909 if (encoder_funcs
->dpms
)
910 (*encoder_funcs
->dpms
) (encoder
,
911 drm_helper_choose_encoder_dpms(encoder
));
915 /* from on to off, do encoder then crtc */
916 if (mode
> old_dpms
) {
918 struct drm_encoder_helper_funcs
*encoder_funcs
= encoder
->helper_private
;
919 if (encoder_funcs
->dpms
)
920 (*encoder_funcs
->dpms
) (encoder
,
921 drm_helper_choose_encoder_dpms(encoder
));
924 struct drm_crtc_helper_funcs
*crtc_funcs
= crtc
->helper_private
;
925 if (crtc_funcs
->dpms
)
926 (*crtc_funcs
->dpms
) (crtc
,
927 drm_helper_choose_crtc_dpms(crtc
));
933 EXPORT_SYMBOL(drm_helper_connector_dpms
);
935 int drm_helper_mode_fill_fb_struct(struct drm_framebuffer
*fb
,
936 struct drm_mode_fb_cmd2
*mode_cmd
)
940 fb
->width
= mode_cmd
->width
;
941 fb
->height
= mode_cmd
->height
;
942 for (i
= 0; i
< 4; i
++) {
943 fb
->pitches
[i
] = mode_cmd
->pitches
[i
];
944 fb
->offsets
[i
] = mode_cmd
->offsets
[i
];
946 drm_fb_get_bpp_depth(mode_cmd
->pixel_format
, &fb
->depth
,
947 &fb
->bits_per_pixel
);
948 fb
->pixel_format
= mode_cmd
->pixel_format
;
952 EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct
);
954 int drm_helper_resume_force_mode(struct drm_device
*dev
)
956 struct drm_crtc
*crtc
;
957 struct drm_encoder
*encoder
;
958 struct drm_encoder_helper_funcs
*encoder_funcs
;
959 struct drm_crtc_helper_funcs
*crtc_funcs
;
962 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
967 ret
= drm_crtc_helper_set_mode(crtc
, &crtc
->mode
,
968 crtc
->x
, crtc
->y
, crtc
->fb
);
971 DRM_ERROR("failed to set mode on crtc %p\n", crtc
);
973 /* Turn off outputs that were already powered off */
974 if (drm_helper_choose_crtc_dpms(crtc
)) {
975 list_for_each_entry(encoder
, &dev
->mode_config
.encoder_list
, head
) {
977 if(encoder
->crtc
!= crtc
)
980 encoder_funcs
= encoder
->helper_private
;
981 if (encoder_funcs
->dpms
)
982 (*encoder_funcs
->dpms
) (encoder
,
983 drm_helper_choose_encoder_dpms(encoder
));
986 crtc_funcs
= crtc
->helper_private
;
987 if (crtc_funcs
->dpms
)
988 (*crtc_funcs
->dpms
) (crtc
,
989 drm_helper_choose_crtc_dpms(crtc
));
992 /* disable the unused connectors while restoring the modesetting */
993 drm_helper_disable_unused_functions(dev
);
996 EXPORT_SYMBOL(drm_helper_resume_force_mode
);
998 void drm_kms_helper_hotplug_event(struct drm_device
*dev
)
1000 /* send a uevent + call fbdev */
1001 drm_sysfs_hotplug_event(dev
);
1002 if (dev
->mode_config
.funcs
->output_poll_changed
)
1003 dev
->mode_config
.funcs
->output_poll_changed(dev
);
1005 EXPORT_SYMBOL(drm_kms_helper_hotplug_event
);
1007 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
1008 static void output_poll_execute(struct work_struct
*work
)
1010 struct delayed_work
*delayed_work
= to_delayed_work(work
);
1011 struct drm_device
*dev
= container_of(delayed_work
, struct drm_device
, mode_config
.output_poll_work
);
1012 struct drm_connector
*connector
;
1013 enum drm_connector_status old_status
;
1014 bool repoll
= false, changed
;
1016 /* Pick up any changes detected by the probe functions. */
1017 changed
= dev
->mode_config
.delayed_event
;
1018 dev
->mode_config
.delayed_event
= false;
1020 if (!drm_kms_helper_poll
)
1023 mutex_lock(&dev
->mode_config
.mutex
);
1024 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1026 /* Ignore forced connectors. */
1027 if (connector
->force
)
1030 /* Ignore HPD capable connectors and connectors where we don't
1031 * want any hotplug detection at all for polling. */
1032 if (!connector
->polled
|| connector
->polled
== DRM_CONNECTOR_POLL_HPD
)
1037 old_status
= connector
->status
;
1038 /* if we are connected and don't want to poll for disconnect
1040 if (old_status
== connector_status_connected
&&
1041 !(connector
->polled
& DRM_CONNECTOR_POLL_DISCONNECT
))
1044 connector
->status
= connector
->funcs
->detect(connector
, false);
1045 if (old_status
!= connector
->status
) {
1046 const char *old
, *new;
1048 old
= drm_get_connector_status_name(old_status
);
1049 new = drm_get_connector_status_name(connector
->status
);
1051 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] "
1052 "status updated from %s to %s\n",
1054 drm_get_connector_name(connector
),
1061 mutex_unlock(&dev
->mode_config
.mutex
);
1064 drm_kms_helper_hotplug_event(dev
);
1067 schedule_delayed_work(delayed_work
, DRM_OUTPUT_POLL_PERIOD
);
1070 void drm_kms_helper_poll_disable(struct drm_device
*dev
)
1072 if (!dev
->mode_config
.poll_enabled
)
1074 cancel_delayed_work_sync(&dev
->mode_config
.output_poll_work
);
1076 EXPORT_SYMBOL(drm_kms_helper_poll_disable
);
1078 void drm_kms_helper_poll_enable(struct drm_device
*dev
)
1081 struct drm_connector
*connector
;
1083 if (!dev
->mode_config
.poll_enabled
|| !drm_kms_helper_poll
)
1086 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1087 if (connector
->polled
& (DRM_CONNECTOR_POLL_CONNECT
|
1088 DRM_CONNECTOR_POLL_DISCONNECT
))
1093 schedule_delayed_work(&dev
->mode_config
.output_poll_work
, DRM_OUTPUT_POLL_PERIOD
);
1095 EXPORT_SYMBOL(drm_kms_helper_poll_enable
);
1097 void drm_kms_helper_poll_init(struct drm_device
*dev
)
1099 INIT_DELAYED_WORK(&dev
->mode_config
.output_poll_work
, output_poll_execute
);
1100 dev
->mode_config
.poll_enabled
= true;
1102 drm_kms_helper_poll_enable(dev
);
1104 EXPORT_SYMBOL(drm_kms_helper_poll_init
);
1106 void drm_kms_helper_poll_fini(struct drm_device
*dev
)
1108 drm_kms_helper_poll_disable(dev
);
1110 EXPORT_SYMBOL(drm_kms_helper_poll_fini
);
1112 void drm_helper_hpd_irq_event(struct drm_device
*dev
)
1114 struct drm_connector
*connector
;
1115 enum drm_connector_status old_status
;
1116 bool changed
= false;
1118 if (!dev
->mode_config
.poll_enabled
)
1121 mutex_lock(&dev
->mode_config
.mutex
);
1122 list_for_each_entry(connector
, &dev
->mode_config
.connector_list
, head
) {
1124 /* Only handle HPD capable connectors. */
1125 if (!(connector
->polled
& DRM_CONNECTOR_POLL_HPD
))
1128 old_status
= connector
->status
;
1130 connector
->status
= connector
->funcs
->detect(connector
, false);
1131 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
1133 drm_get_connector_name(connector
),
1134 drm_get_connector_status_name(old_status
),
1135 drm_get_connector_status_name(connector
->status
));
1136 if (old_status
!= connector
->status
)
1140 mutex_unlock(&dev
->mode_config
.mutex
);
1143 drm_kms_helper_hotplug_event(dev
);
1145 EXPORT_SYMBOL(drm_helper_hpd_irq_event
);