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1// SPDX-License-Identifier: MIT
2/*
3 * Copyright 2018 Noralf Trønnes
4 * Copyright (c) 2006-2009 Red Hat Inc.
5 * Copyright (c) 2006-2008 Intel Corporation
6 * Jesse Barnes <jesse.barnes@intel.com>
7 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
8 */
9
10#include <linux/module.h>
11#include <linux/mutex.h>
12#include <linux/slab.h>
13
14#include <drm/drm_atomic.h>
15#include <drm/drm_client.h>
16#include <drm/drm_connector.h>
17#include <drm/drm_crtc.h>
18#include <drm/drm_device.h>
19#include <drm/drm_drv.h>
20#include <drm/drm_encoder.h>
21#include <drm/drm_print.h>
22
23#include "drm_crtc_internal.h"
24#include "drm_internal.h"
25
26#define DRM_CLIENT_MAX_CLONED_CONNECTORS 8
27
28struct drm_client_offset {
29 int x, y;
30};
31
32int drm_client_modeset_create(struct drm_client_dev *client)
33{
34 struct drm_device *dev = client->dev;
35 unsigned int num_crtc = dev->mode_config.num_crtc;
36 unsigned int max_connector_count = 1;
37 struct drm_mode_set *modeset;
38 struct drm_crtc *crtc;
39 unsigned int i = 0;
40
41 /* Add terminating zero entry to enable index less iteration */
42 client->modesets = kcalloc(num_crtc + 1, sizeof(*client->modesets), GFP_KERNEL);
43 if (!client->modesets)
44 return -ENOMEM;
45
46 mutex_init(&client->modeset_mutex);
47
48 drm_for_each_crtc(crtc, dev)
49 client->modesets[i++].crtc = crtc;
50
51 /* Cloning is only supported in the single crtc case. */
52 if (num_crtc == 1)
53 max_connector_count = DRM_CLIENT_MAX_CLONED_CONNECTORS;
54
55 for (modeset = client->modesets; modeset->crtc; modeset++) {
56 modeset->connectors = kcalloc(max_connector_count,
57 sizeof(*modeset->connectors), GFP_KERNEL);
58 if (!modeset->connectors)
59 goto err_free;
60 }
61
62 return 0;
63
64err_free:
65 drm_client_modeset_free(client);
66
67 return -ENOMEM;
68}
69
70static void drm_client_modeset_release(struct drm_client_dev *client)
71{
72 struct drm_mode_set *modeset;
73 unsigned int i;
74
75 drm_client_for_each_modeset(modeset, client) {
76 drm_mode_destroy(client->dev, modeset->mode);
77 modeset->mode = NULL;
78 modeset->fb = NULL;
79
80 for (i = 0; i < modeset->num_connectors; i++) {
81 drm_connector_put(modeset->connectors[i]);
82 modeset->connectors[i] = NULL;
83 }
84 modeset->num_connectors = 0;
85 }
86}
87
88void drm_client_modeset_free(struct drm_client_dev *client)
89{
90 struct drm_mode_set *modeset;
91
92 mutex_lock(&client->modeset_mutex);
93
94 drm_client_modeset_release(client);
95
96 drm_client_for_each_modeset(modeset, client)
97 kfree(modeset->connectors);
98
99 mutex_unlock(&client->modeset_mutex);
100
101 mutex_destroy(&client->modeset_mutex);
102 kfree(client->modesets);
103}
104
105static struct drm_mode_set *
106drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc)
107{
108 struct drm_mode_set *modeset;
109
110 drm_client_for_each_modeset(modeset, client)
111 if (modeset->crtc == crtc)
112 return modeset;
113
114 return NULL;
115}
116
117static struct drm_display_mode *
118drm_connector_get_tiled_mode(struct drm_connector *connector)
119{
120 struct drm_display_mode *mode;
121
122 list_for_each_entry(mode, &connector->modes, head) {
123 if (mode->hdisplay == connector->tile_h_size &&
124 mode->vdisplay == connector->tile_v_size)
125 return mode;
126 }
127 return NULL;
128}
129
130static struct drm_display_mode *
131drm_connector_fallback_non_tiled_mode(struct drm_connector *connector)
132{
133 struct drm_display_mode *mode;
134
135 list_for_each_entry(mode, &connector->modes, head) {
136 if (mode->hdisplay == connector->tile_h_size &&
137 mode->vdisplay == connector->tile_v_size)
138 continue;
139 return mode;
140 }
141 return NULL;
142}
143
144static struct drm_display_mode *
145drm_connector_has_preferred_mode(struct drm_connector *connector, int width, int height)
146{
147 struct drm_display_mode *mode;
148
149 list_for_each_entry(mode, &connector->modes, head) {
150 if (mode->hdisplay > width ||
151 mode->vdisplay > height)
152 continue;
153 if (mode->type & DRM_MODE_TYPE_PREFERRED)
154 return mode;
155 }
156 return NULL;
157}
158
159static struct drm_display_mode *
160drm_connector_pick_cmdline_mode(struct drm_connector *connector)
161{
162 struct drm_cmdline_mode *cmdline_mode;
163 struct drm_display_mode *mode;
164 bool prefer_non_interlace;
165
166 cmdline_mode = &connector->cmdline_mode;
167 if (cmdline_mode->specified == false)
168 return NULL;
169
170 /* attempt to find a matching mode in the list of modes
171 * we have gotten so far, if not add a CVT mode that conforms
172 */
173 if (cmdline_mode->rb || cmdline_mode->margins)
174 goto create_mode;
175
176 prefer_non_interlace = !cmdline_mode->interlace;
177again:
178 list_for_each_entry(mode, &connector->modes, head) {
179 /* Check (optional) mode name first */
180 if (!strcmp(mode->name, cmdline_mode->name))
181 return mode;
182
183 /* check width/height */
184 if (mode->hdisplay != cmdline_mode->xres ||
185 mode->vdisplay != cmdline_mode->yres)
186 continue;
187
188 if (cmdline_mode->refresh_specified) {
189 if (drm_mode_vrefresh(mode) != cmdline_mode->refresh)
190 continue;
191 }
192
193 if (cmdline_mode->interlace) {
194 if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
195 continue;
196 } else if (prefer_non_interlace) {
197 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
198 continue;
199 }
200 return mode;
201 }
202
203 if (prefer_non_interlace) {
204 prefer_non_interlace = false;
205 goto again;
206 }
207
208create_mode:
209 mode = drm_mode_create_from_cmdline_mode(connector->dev, cmdline_mode);
210 if (mode)
211 list_add(&mode->head, &connector->modes);
212
213 return mode;
214}
215
216static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
217{
218 bool enable;
219
220 if (connector->display_info.non_desktop)
221 return false;
222
223 if (strict)
224 enable = connector->status == connector_status_connected;
225 else
226 enable = connector->status != connector_status_disconnected;
227
228 return enable;
229}
230
231static void drm_client_connectors_enabled(struct drm_connector **connectors,
232 unsigned int connector_count,
233 bool *enabled)
234{
235 bool any_enabled = false;
236 struct drm_connector *connector;
237 int i = 0;
238
239 for (i = 0; i < connector_count; i++) {
240 connector = connectors[i];
241 enabled[i] = drm_connector_enabled(connector, true);
242 DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
243 connector->display_info.non_desktop ? "non desktop" : enabled[i] ? "yes" : "no");
244
245 any_enabled |= enabled[i];
246 }
247
248 if (any_enabled)
249 return;
250
251 for (i = 0; i < connector_count; i++)
252 enabled[i] = drm_connector_enabled(connectors[i], false);
253}
254
255static bool drm_client_target_cloned(struct drm_device *dev,
256 struct drm_connector **connectors,
257 unsigned int connector_count,
258 struct drm_display_mode **modes,
259 struct drm_client_offset *offsets,
260 bool *enabled, int width, int height)
261{
262 int count, i, j;
263 bool can_clone = false;
264 struct drm_display_mode *dmt_mode, *mode;
265
266 /* only contemplate cloning in the single crtc case */
267 if (dev->mode_config.num_crtc > 1)
268 return false;
269
270 count = 0;
271 for (i = 0; i < connector_count; i++) {
272 if (enabled[i])
273 count++;
274 }
275
276 /* only contemplate cloning if more than one connector is enabled */
277 if (count <= 1)
278 return false;
279
280 /* check the command line or if nothing common pick 1024x768 */
281 can_clone = true;
282 for (i = 0; i < connector_count; i++) {
283 if (!enabled[i])
284 continue;
285 modes[i] = drm_connector_pick_cmdline_mode(connectors[i]);
286 if (!modes[i]) {
287 can_clone = false;
288 break;
289 }
290 for (j = 0; j < i; j++) {
291 if (!enabled[j])
292 continue;
293 if (!drm_mode_match(modes[j], modes[i],
294 DRM_MODE_MATCH_TIMINGS |
295 DRM_MODE_MATCH_CLOCK |
296 DRM_MODE_MATCH_FLAGS |
297 DRM_MODE_MATCH_3D_FLAGS))
298 can_clone = false;
299 }
300 }
301
302 if (can_clone) {
303 DRM_DEBUG_KMS("can clone using command line\n");
304 return true;
305 }
306
307 /* try and find a 1024x768 mode on each connector */
308 can_clone = true;
309 dmt_mode = drm_mode_find_dmt(dev, 1024, 768, 60, false);
310
311 for (i = 0; i < connector_count; i++) {
312 if (!enabled[i])
313 continue;
314
315 list_for_each_entry(mode, &connectors[i]->modes, head) {
316 if (drm_mode_match(mode, dmt_mode,
317 DRM_MODE_MATCH_TIMINGS |
318 DRM_MODE_MATCH_CLOCK |
319 DRM_MODE_MATCH_FLAGS |
320 DRM_MODE_MATCH_3D_FLAGS))
321 modes[i] = mode;
322 }
323 if (!modes[i])
324 can_clone = false;
325 }
326
327 if (can_clone) {
328 DRM_DEBUG_KMS("can clone using 1024x768\n");
329 return true;
330 }
331 DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
332 return false;
333}
334
335static int drm_client_get_tile_offsets(struct drm_connector **connectors,
336 unsigned int connector_count,
337 struct drm_display_mode **modes,
338 struct drm_client_offset *offsets,
339 int idx,
340 int h_idx, int v_idx)
341{
342 struct drm_connector *connector;
343 int i;
344 int hoffset = 0, voffset = 0;
345
346 for (i = 0; i < connector_count; i++) {
347 connector = connectors[i];
348 if (!connector->has_tile)
349 continue;
350
351 if (!modes[i] && (h_idx || v_idx)) {
352 DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i,
353 connector->base.id);
354 continue;
355 }
356 if (connector->tile_h_loc < h_idx)
357 hoffset += modes[i]->hdisplay;
358
359 if (connector->tile_v_loc < v_idx)
360 voffset += modes[i]->vdisplay;
361 }
362 offsets[idx].x = hoffset;
363 offsets[idx].y = voffset;
364 DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx);
365 return 0;
366}
367
368static bool drm_client_target_preferred(struct drm_connector **connectors,
369 unsigned int connector_count,
370 struct drm_display_mode **modes,
371 struct drm_client_offset *offsets,
372 bool *enabled, int width, int height)
373{
374 const u64 mask = BIT_ULL(connector_count) - 1;
375 struct drm_connector *connector;
376 u64 conn_configured = 0;
377 int tile_pass = 0;
378 int num_tiled_conns = 0;
379 int i;
380
381 for (i = 0; i < connector_count; i++) {
382 if (connectors[i]->has_tile &&
383 connectors[i]->status == connector_status_connected)
384 num_tiled_conns++;
385 }
386
387retry:
388 for (i = 0; i < connector_count; i++) {
389 connector = connectors[i];
390
391 if (conn_configured & BIT_ULL(i))
392 continue;
393
394 if (enabled[i] == false) {
395 conn_configured |= BIT_ULL(i);
396 continue;
397 }
398
399 /* first pass over all the untiled connectors */
400 if (tile_pass == 0 && connector->has_tile)
401 continue;
402
403 if (tile_pass == 1) {
404 if (connector->tile_h_loc != 0 ||
405 connector->tile_v_loc != 0)
406 continue;
407
408 } else {
409 if (connector->tile_h_loc != tile_pass - 1 &&
410 connector->tile_v_loc != tile_pass - 1)
411 /* if this tile_pass doesn't cover any of the tiles - keep going */
412 continue;
413
414 /*
415 * find the tile offsets for this pass - need to find
416 * all tiles left and above
417 */
418 drm_client_get_tile_offsets(connectors, connector_count, modes, offsets, i,
419 connector->tile_h_loc, connector->tile_v_loc);
420 }
421 DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
422 connector->base.id);
423
424 /* got for command line mode first */
425 modes[i] = drm_connector_pick_cmdline_mode(connector);
426 if (!modes[i]) {
427 DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n",
428 connector->base.id, connector->tile_group ? connector->tile_group->id : 0);
429 modes[i] = drm_connector_has_preferred_mode(connector, width, height);
430 }
431 /* No preferred modes, pick one off the list */
432 if (!modes[i] && !list_empty(&connector->modes)) {
433 list_for_each_entry(modes[i], &connector->modes, head)
434 break;
435 }
436 /*
437 * In case of tiled mode if all tiles not present fallback to
438 * first available non tiled mode.
439 * After all tiles are present, try to find the tiled mode
440 * for all and if tiled mode not present due to fbcon size
441 * limitations, use first non tiled mode only for
442 * tile 0,0 and set to no mode for all other tiles.
443 */
444 if (connector->has_tile) {
445 if (num_tiled_conns <
446 connector->num_h_tile * connector->num_v_tile ||
447 (connector->tile_h_loc == 0 &&
448 connector->tile_v_loc == 0 &&
449 !drm_connector_get_tiled_mode(connector))) {
450 DRM_DEBUG_KMS("Falling back to non tiled mode on Connector %d\n",
451 connector->base.id);
452 modes[i] = drm_connector_fallback_non_tiled_mode(connector);
453 } else {
454 modes[i] = drm_connector_get_tiled_mode(connector);
455 }
456 }
457
458 DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
459 "none");
460 conn_configured |= BIT_ULL(i);
461 }
462
463 if ((conn_configured & mask) != mask) {
464 tile_pass++;
465 goto retry;
466 }
467 return true;
468}
469
470static bool connector_has_possible_crtc(struct drm_connector *connector,
471 struct drm_crtc *crtc)
472{
473 struct drm_encoder *encoder;
474
475 drm_connector_for_each_possible_encoder(connector, encoder) {
476 if (encoder->possible_crtcs & drm_crtc_mask(crtc))
477 return true;
478 }
479
480 return false;
481}
482
483static int drm_client_pick_crtcs(struct drm_client_dev *client,
484 struct drm_connector **connectors,
485 unsigned int connector_count,
486 struct drm_crtc **best_crtcs,
487 struct drm_display_mode **modes,
488 int n, int width, int height)
489{
490 struct drm_device *dev = client->dev;
491 struct drm_connector *connector;
492 int my_score, best_score, score;
493 struct drm_crtc **crtcs, *crtc;
494 struct drm_mode_set *modeset;
495 int o;
496
497 if (n == connector_count)
498 return 0;
499
500 connector = connectors[n];
501
502 best_crtcs[n] = NULL;
503 best_score = drm_client_pick_crtcs(client, connectors, connector_count,
504 best_crtcs, modes, n + 1, width, height);
505 if (modes[n] == NULL)
506 return best_score;
507
508 crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL);
509 if (!crtcs)
510 return best_score;
511
512 my_score = 1;
513 if (connector->status == connector_status_connected)
514 my_score++;
515 if (connector->cmdline_mode.specified)
516 my_score++;
517 if (drm_connector_has_preferred_mode(connector, width, height))
518 my_score++;
519
520 /*
521 * select a crtc for this connector and then attempt to configure
522 * remaining connectors
523 */
524 drm_client_for_each_modeset(modeset, client) {
525 crtc = modeset->crtc;
526
527 if (!connector_has_possible_crtc(connector, crtc))
528 continue;
529
530 for (o = 0; o < n; o++)
531 if (best_crtcs[o] == crtc)
532 break;
533
534 if (o < n) {
535 /* ignore cloning unless only a single crtc */
536 if (dev->mode_config.num_crtc > 1)
537 continue;
538
539 if (!drm_mode_equal(modes[o], modes[n]))
540 continue;
541 }
542
543 crtcs[n] = crtc;
544 memcpy(crtcs, best_crtcs, n * sizeof(*crtcs));
545 score = my_score + drm_client_pick_crtcs(client, connectors, connector_count,
546 crtcs, modes, n + 1, width, height);
547 if (score > best_score) {
548 best_score = score;
549 memcpy(best_crtcs, crtcs, connector_count * sizeof(*crtcs));
550 }
551 }
552
553 kfree(crtcs);
554 return best_score;
555}
556
557/* Try to read the BIOS display configuration and use it for the initial config */
558static bool drm_client_firmware_config(struct drm_client_dev *client,
559 struct drm_connector **connectors,
560 unsigned int connector_count,
561 struct drm_crtc **crtcs,
562 struct drm_display_mode **modes,
563 struct drm_client_offset *offsets,
564 bool *enabled, int width, int height)
565{
566 const int count = min_t(unsigned int, connector_count, BITS_PER_LONG);
567 unsigned long conn_configured, conn_seq, mask;
568 struct drm_device *dev = client->dev;
569 int i, j;
570 bool *save_enabled;
571 bool fallback = true, ret = true;
572 int num_connectors_enabled = 0;
573 int num_connectors_detected = 0;
574 int num_tiled_conns = 0;
575 struct drm_modeset_acquire_ctx ctx;
576
577 if (!drm_drv_uses_atomic_modeset(dev))
578 return false;
579
580 if (WARN_ON(count <= 0))
581 return false;
582
583 save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
584 if (!save_enabled)
585 return false;
586
587 drm_modeset_acquire_init(&ctx, 0);
588
589 while (drm_modeset_lock_all_ctx(dev, &ctx) != 0)
590 drm_modeset_backoff(&ctx);
591
592 memcpy(save_enabled, enabled, count);
593 mask = GENMASK(count - 1, 0);
594 conn_configured = 0;
595 for (i = 0; i < count; i++) {
596 if (connectors[i]->has_tile &&
597 connectors[i]->status == connector_status_connected)
598 num_tiled_conns++;
599 }
600retry:
601 conn_seq = conn_configured;
602 for (i = 0; i < count; i++) {
603 struct drm_connector *connector;
604 struct drm_encoder *encoder;
605 struct drm_crtc *new_crtc;
606
607 connector = connectors[i];
608
609 if (conn_configured & BIT(i))
610 continue;
611
612 if (conn_seq == 0 && !connector->has_tile)
613 continue;
614
615 if (connector->status == connector_status_connected)
616 num_connectors_detected++;
617
618 if (!enabled[i]) {
619 DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
620 connector->name);
621 conn_configured |= BIT(i);
622 continue;
623 }
624
625 if (connector->force == DRM_FORCE_OFF) {
626 DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
627 connector->name);
628 enabled[i] = false;
629 continue;
630 }
631
632 encoder = connector->state->best_encoder;
633 if (!encoder || WARN_ON(!connector->state->crtc)) {
634 if (connector->force > DRM_FORCE_OFF)
635 goto bail;
636
637 DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
638 connector->name);
639 enabled[i] = false;
640 conn_configured |= BIT(i);
641 continue;
642 }
643
644 num_connectors_enabled++;
645
646 new_crtc = connector->state->crtc;
647
648 /*
649 * Make sure we're not trying to drive multiple connectors
650 * with a single CRTC, since our cloning support may not
651 * match the BIOS.
652 */
653 for (j = 0; j < count; j++) {
654 if (crtcs[j] == new_crtc) {
655 DRM_DEBUG_KMS("fallback: cloned configuration\n");
656 goto bail;
657 }
658 }
659
660 DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
661 connector->name);
662
663 /* go for command line mode first */
664 modes[i] = drm_connector_pick_cmdline_mode(connector);
665
666 /* try for preferred next */
667 if (!modes[i]) {
668 DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
669 connector->name, connector->has_tile);
670 modes[i] = drm_connector_has_preferred_mode(connector, width, height);
671 }
672
673 /* No preferred mode marked by the EDID? Are there any modes? */
674 if (!modes[i] && !list_empty(&connector->modes)) {
675 DRM_DEBUG_KMS("using first mode listed on connector %s\n",
676 connector->name);
677 modes[i] = list_first_entry(&connector->modes,
678 struct drm_display_mode,
679 head);
680 }
681
682 /* last resort: use current mode */
683 if (!modes[i]) {
684 /*
685 * IMPORTANT: We want to use the adjusted mode (i.e.
686 * after the panel fitter upscaling) as the initial
687 * config, not the input mode, which is what crtc->mode
688 * usually contains. But since our current
689 * code puts a mode derived from the post-pfit timings
690 * into crtc->mode this works out correctly.
691 *
692 * This is crtc->mode and not crtc->state->mode for the
693 * fastboot check to work correctly.
694 */
695 DRM_DEBUG_KMS("looking for current mode on connector %s\n",
696 connector->name);
697 modes[i] = &connector->state->crtc->mode;
698 }
699 /*
700 * In case of tiled modes, if all tiles are not present
701 * then fallback to a non tiled mode.
702 */
703 if (connector->has_tile &&
704 num_tiled_conns < connector->num_h_tile * connector->num_v_tile) {
705 DRM_DEBUG_KMS("Falling back to non tiled mode on Connector %d\n",
706 connector->base.id);
707 modes[i] = drm_connector_fallback_non_tiled_mode(connector);
708 }
709 crtcs[i] = new_crtc;
710
711 DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
712 connector->name,
713 connector->state->crtc->base.id,
714 connector->state->crtc->name,
715 modes[i]->hdisplay, modes[i]->vdisplay,
716 modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" : "");
717
718 fallback = false;
719 conn_configured |= BIT(i);
720 }
721
722 if ((conn_configured & mask) != mask && conn_configured != conn_seq)
723 goto retry;
724
725 /*
726 * If the BIOS didn't enable everything it could, fall back to have the
727 * same user experiencing of lighting up as much as possible like the
728 * fbdev helper library.
729 */
730 if (num_connectors_enabled != num_connectors_detected &&
731 num_connectors_enabled < dev->mode_config.num_crtc) {
732 DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
733 DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
734 num_connectors_detected);
735 fallback = true;
736 }
737
738 if (fallback) {
739bail:
740 DRM_DEBUG_KMS("Not using firmware configuration\n");
741 memcpy(enabled, save_enabled, count);
742 ret = false;
743 }
744
745 drm_modeset_drop_locks(&ctx);
746 drm_modeset_acquire_fini(&ctx);
747
748 kfree(save_enabled);
749 return ret;
750}
751
752/**
753 * drm_client_modeset_probe() - Probe for displays
754 * @client: DRM client
755 * @width: Maximum display mode width (optional)
756 * @height: Maximum display mode height (optional)
757 *
758 * This function sets up display pipelines for enabled connectors and stores the
759 * config in the client's modeset array.
760 *
761 * Returns:
762 * Zero on success or negative error code on failure.
763 */
764int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height)
765{
766 struct drm_connector *connector, **connectors = NULL;
767 struct drm_connector_list_iter conn_iter;
768 struct drm_device *dev = client->dev;
769 unsigned int total_modes_count = 0;
770 struct drm_client_offset *offsets;
771 unsigned int connector_count = 0;
772 struct drm_display_mode **modes;
773 struct drm_crtc **crtcs;
774 int i, ret = 0;
775 bool *enabled;
776
777 DRM_DEBUG_KMS("\n");
778
779 if (!width)
780 width = dev->mode_config.max_width;
781 if (!height)
782 height = dev->mode_config.max_height;
783
784 drm_connector_list_iter_begin(dev, &conn_iter);
785 drm_client_for_each_connector_iter(connector, &conn_iter) {
786 struct drm_connector **tmp;
787
788 tmp = krealloc(connectors, (connector_count + 1) * sizeof(*connectors), GFP_KERNEL);
789 if (!tmp) {
790 ret = -ENOMEM;
791 goto free_connectors;
792 }
793
794 connectors = tmp;
795 drm_connector_get(connector);
796 connectors[connector_count++] = connector;
797 }
798 drm_connector_list_iter_end(&conn_iter);
799
800 if (!connector_count)
801 return 0;
802
803 crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL);
804 modes = kcalloc(connector_count, sizeof(*modes), GFP_KERNEL);
805 offsets = kcalloc(connector_count, sizeof(*offsets), GFP_KERNEL);
806 enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL);
807 if (!crtcs || !modes || !enabled || !offsets) {
808 DRM_ERROR("Memory allocation failed\n");
809 ret = -ENOMEM;
810 goto out;
811 }
812
813 mutex_lock(&client->modeset_mutex);
814
815 mutex_lock(&dev->mode_config.mutex);
816 for (i = 0; i < connector_count; i++)
817 total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height);
818 if (!total_modes_count)
819 DRM_DEBUG_KMS("No connectors reported connected with modes\n");
820 drm_client_connectors_enabled(connectors, connector_count, enabled);
821
822 if (!drm_client_firmware_config(client, connectors, connector_count, crtcs,
823 modes, offsets, enabled, width, height)) {
824 memset(modes, 0, connector_count * sizeof(*modes));
825 memset(crtcs, 0, connector_count * sizeof(*crtcs));
826 memset(offsets, 0, connector_count * sizeof(*offsets));
827
828 if (!drm_client_target_cloned(dev, connectors, connector_count, modes,
829 offsets, enabled, width, height) &&
830 !drm_client_target_preferred(connectors, connector_count, modes,
831 offsets, enabled, width, height))
832 DRM_ERROR("Unable to find initial modes\n");
833
834 DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n",
835 width, height);
836
837 drm_client_pick_crtcs(client, connectors, connector_count,
838 crtcs, modes, 0, width, height);
839 }
840 mutex_unlock(&dev->mode_config.mutex);
841
842 drm_client_modeset_release(client);
843
844 for (i = 0; i < connector_count; i++) {
845 struct drm_display_mode *mode = modes[i];
846 struct drm_crtc *crtc = crtcs[i];
847 struct drm_client_offset *offset = &offsets[i];
848
849 if (mode && crtc) {
850 struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc);
851 struct drm_connector *connector = connectors[i];
852
853 DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n",
854 mode->name, crtc->base.id, offset->x, offset->y);
855
856 if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS ||
857 (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) {
858 ret = -EINVAL;
859 break;
860 }
861
862 modeset->mode = drm_mode_duplicate(dev, mode);
863 drm_connector_get(connector);
864 modeset->connectors[modeset->num_connectors++] = connector;
865 modeset->x = offset->x;
866 modeset->y = offset->y;
867 }
868 }
869
870 mutex_unlock(&client->modeset_mutex);
871out:
872 kfree(crtcs);
873 kfree(modes);
874 kfree(offsets);
875 kfree(enabled);
876free_connectors:
877 for (i = 0; i < connector_count; i++)
878 drm_connector_put(connectors[i]);
879 kfree(connectors);
880
881 return ret;
882}
883EXPORT_SYMBOL(drm_client_modeset_probe);
884
885/**
886 * drm_client_rotation() - Check the initial rotation value
887 * @modeset: DRM modeset
888 * @rotation: Returned rotation value
889 *
890 * This function checks if the primary plane in @modeset can hw rotate
891 * to match the rotation needed on its connector.
892 *
893 * Note: Currently only 0 and 180 degrees are supported.
894 *
895 * Return:
896 * True if the plane can do the rotation, false otherwise.
897 */
898bool drm_client_rotation(struct drm_mode_set *modeset, unsigned int *rotation)
899{
900 struct drm_connector *connector = modeset->connectors[0];
901 struct drm_plane *plane = modeset->crtc->primary;
902 struct drm_cmdline_mode *cmdline;
903 u64 valid_mask = 0;
904 unsigned int i;
905
906 if (!modeset->num_connectors)
907 return false;
908
909 switch (connector->display_info.panel_orientation) {
910 case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP:
911 *rotation = DRM_MODE_ROTATE_180;
912 break;
913 case DRM_MODE_PANEL_ORIENTATION_LEFT_UP:
914 *rotation = DRM_MODE_ROTATE_90;
915 break;
916 case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP:
917 *rotation = DRM_MODE_ROTATE_270;
918 break;
919 default:
920 *rotation = DRM_MODE_ROTATE_0;
921 }
922
923 /**
924 * The panel already defined the default rotation
925 * through its orientation. Whatever has been provided
926 * on the command line needs to be added to that.
927 *
928 * Unfortunately, the rotations are at different bit
929 * indices, so the math to add them up are not as
930 * trivial as they could.
931 *
932 * Reflections on the other hand are pretty trivial to deal with, a
933 * simple XOR between the two handle the addition nicely.
934 */
935 cmdline = &connector->cmdline_mode;
936 if (cmdline->specified && cmdline->rotation_reflection) {
937 unsigned int cmdline_rest, panel_rest;
938 unsigned int cmdline_rot, panel_rot;
939 unsigned int sum_rot, sum_rest;
940
941 panel_rot = ilog2(*rotation & DRM_MODE_ROTATE_MASK);
942 cmdline_rot = ilog2(cmdline->rotation_reflection & DRM_MODE_ROTATE_MASK);
943 sum_rot = (panel_rot + cmdline_rot) % 4;
944
945 panel_rest = *rotation & ~DRM_MODE_ROTATE_MASK;
946 cmdline_rest = cmdline->rotation_reflection & ~DRM_MODE_ROTATE_MASK;
947 sum_rest = panel_rest ^ cmdline_rest;
948
949 *rotation = (1 << sum_rot) | sum_rest;
950 }
951
952 /*
953 * TODO: support 90 / 270 degree hardware rotation,
954 * depending on the hardware this may require the framebuffer
955 * to be in a specific tiling format.
956 */
957 if (((*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_0 &&
958 (*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_180) ||
959 !plane->rotation_property)
960 return false;
961
962 for (i = 0; i < plane->rotation_property->num_values; i++)
963 valid_mask |= (1ULL << plane->rotation_property->values[i]);
964
965 if (!(*rotation & valid_mask))
966 return false;
967
968 return true;
969}
970EXPORT_SYMBOL(drm_client_rotation);
971
972static int drm_client_modeset_commit_atomic(struct drm_client_dev *client, bool active, bool check)
973{
974 struct drm_device *dev = client->dev;
975 struct drm_plane *plane;
976 struct drm_atomic_state *state;
977 struct drm_modeset_acquire_ctx ctx;
978 struct drm_mode_set *mode_set;
979 int ret;
980
981 drm_modeset_acquire_init(&ctx, 0);
982
983 state = drm_atomic_state_alloc(dev);
984 if (!state) {
985 ret = -ENOMEM;
986 goto out_ctx;
987 }
988
989 state->acquire_ctx = &ctx;
990retry:
991 drm_for_each_plane(plane, dev) {
992 struct drm_plane_state *plane_state;
993
994 plane_state = drm_atomic_get_plane_state(state, plane);
995 if (IS_ERR(plane_state)) {
996 ret = PTR_ERR(plane_state);
997 goto out_state;
998 }
999
1000 plane_state->rotation = DRM_MODE_ROTATE_0;
1001
1002 /* disable non-primary: */
1003 if (plane->type == DRM_PLANE_TYPE_PRIMARY)
1004 continue;
1005
1006 ret = __drm_atomic_helper_disable_plane(plane, plane_state);
1007 if (ret != 0)
1008 goto out_state;
1009 }
1010
1011 drm_client_for_each_modeset(mode_set, client) {
1012 struct drm_plane *primary = mode_set->crtc->primary;
1013 unsigned int rotation;
1014
1015 if (drm_client_rotation(mode_set, &rotation)) {
1016 struct drm_plane_state *plane_state;
1017
1018 /* Cannot fail as we've already gotten the plane state above */
1019 plane_state = drm_atomic_get_new_plane_state(state, primary);
1020 plane_state->rotation = rotation;
1021 }
1022
1023 ret = __drm_atomic_helper_set_config(mode_set, state);
1024 if (ret != 0)
1025 goto out_state;
1026
1027 /*
1028 * __drm_atomic_helper_set_config() sets active when a
1029 * mode is set, unconditionally clear it if we force DPMS off
1030 */
1031 if (!active) {
1032 struct drm_crtc *crtc = mode_set->crtc;
1033 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
1034
1035 crtc_state->active = false;
1036 }
1037 }
1038
1039 if (check)
1040 ret = drm_atomic_check_only(state);
1041 else
1042 ret = drm_atomic_commit(state);
1043
1044out_state:
1045 if (ret == -EDEADLK)
1046 goto backoff;
1047
1048 drm_atomic_state_put(state);
1049out_ctx:
1050 drm_modeset_drop_locks(&ctx);
1051 drm_modeset_acquire_fini(&ctx);
1052
1053 return ret;
1054
1055backoff:
1056 drm_atomic_state_clear(state);
1057 drm_modeset_backoff(&ctx);
1058
1059 goto retry;
1060}
1061
1062static int drm_client_modeset_commit_legacy(struct drm_client_dev *client)
1063{
1064 struct drm_device *dev = client->dev;
1065 struct drm_mode_set *mode_set;
1066 struct drm_plane *plane;
1067 int ret = 0;
1068
1069 drm_modeset_lock_all(dev);
1070 drm_for_each_plane(plane, dev) {
1071 if (plane->type != DRM_PLANE_TYPE_PRIMARY)
1072 drm_plane_force_disable(plane);
1073
1074 if (plane->rotation_property)
1075 drm_mode_plane_set_obj_prop(plane,
1076 plane->rotation_property,
1077 DRM_MODE_ROTATE_0);
1078 }
1079
1080 drm_client_for_each_modeset(mode_set, client) {
1081 struct drm_crtc *crtc = mode_set->crtc;
1082
1083 if (crtc->funcs->cursor_set2) {
1084 ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0);
1085 if (ret)
1086 goto out;
1087 } else if (crtc->funcs->cursor_set) {
1088 ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0);
1089 if (ret)
1090 goto out;
1091 }
1092
1093 ret = drm_mode_set_config_internal(mode_set);
1094 if (ret)
1095 goto out;
1096 }
1097out:
1098 drm_modeset_unlock_all(dev);
1099
1100 return ret;
1101}
1102
1103/**
1104 * drm_client_modeset_check() - Check modeset configuration
1105 * @client: DRM client
1106 *
1107 * Check modeset configuration.
1108 *
1109 * Returns:
1110 * Zero on success or negative error code on failure.
1111 */
1112int drm_client_modeset_check(struct drm_client_dev *client)
1113{
1114 int ret;
1115
1116 if (!drm_drv_uses_atomic_modeset(client->dev))
1117 return 0;
1118
1119 mutex_lock(&client->modeset_mutex);
1120 ret = drm_client_modeset_commit_atomic(client, true, true);
1121 mutex_unlock(&client->modeset_mutex);
1122
1123 return ret;
1124}
1125EXPORT_SYMBOL(drm_client_modeset_check);
1126
1127/**
1128 * drm_client_modeset_commit_locked() - Force commit CRTC configuration
1129 * @client: DRM client
1130 *
1131 * Commit modeset configuration to crtcs without checking if there is a DRM
1132 * master. The assumption is that the caller already holds an internal DRM
1133 * master reference acquired with drm_master_internal_acquire().
1134 *
1135 * Returns:
1136 * Zero on success or negative error code on failure.
1137 */
1138int drm_client_modeset_commit_locked(struct drm_client_dev *client)
1139{
1140 struct drm_device *dev = client->dev;
1141 int ret;
1142
1143 mutex_lock(&client->modeset_mutex);
1144 if (drm_drv_uses_atomic_modeset(dev))
1145 ret = drm_client_modeset_commit_atomic(client, true, false);
1146 else
1147 ret = drm_client_modeset_commit_legacy(client);
1148 mutex_unlock(&client->modeset_mutex);
1149
1150 return ret;
1151}
1152EXPORT_SYMBOL(drm_client_modeset_commit_locked);
1153
1154/**
1155 * drm_client_modeset_commit() - Commit CRTC configuration
1156 * @client: DRM client
1157 *
1158 * Commit modeset configuration to crtcs.
1159 *
1160 * Returns:
1161 * Zero on success or negative error code on failure.
1162 */
1163int drm_client_modeset_commit(struct drm_client_dev *client)
1164{
1165 struct drm_device *dev = client->dev;
1166 int ret;
1167
1168 if (!drm_master_internal_acquire(dev))
1169 return -EBUSY;
1170
1171 ret = drm_client_modeset_commit_locked(client);
1172
1173 drm_master_internal_release(dev);
1174
1175 return ret;
1176}
1177EXPORT_SYMBOL(drm_client_modeset_commit);
1178
1179static void drm_client_modeset_dpms_legacy(struct drm_client_dev *client, int dpms_mode)
1180{
1181 struct drm_device *dev = client->dev;
1182 struct drm_connector *connector;
1183 struct drm_mode_set *modeset;
1184 int j;
1185
1186 drm_modeset_lock_all(dev);
1187 drm_client_for_each_modeset(modeset, client) {
1188 if (!modeset->crtc->enabled)
1189 continue;
1190
1191 for (j = 0; j < modeset->num_connectors; j++) {
1192 connector = modeset->connectors[j];
1193 connector->funcs->dpms(connector, dpms_mode);
1194 drm_object_property_set_value(&connector->base,
1195 dev->mode_config.dpms_property, dpms_mode);
1196 }
1197 }
1198 drm_modeset_unlock_all(dev);
1199}
1200
1201/**
1202 * drm_client_modeset_dpms() - Set DPMS mode
1203 * @client: DRM client
1204 * @mode: DPMS mode
1205 *
1206 * Note: For atomic drivers @mode is reduced to on/off.
1207 *
1208 * Returns:
1209 * Zero on success or negative error code on failure.
1210 */
1211int drm_client_modeset_dpms(struct drm_client_dev *client, int mode)
1212{
1213 struct drm_device *dev = client->dev;
1214 int ret = 0;
1215
1216 if (!drm_master_internal_acquire(dev))
1217 return -EBUSY;
1218
1219 mutex_lock(&client->modeset_mutex);
1220 if (drm_drv_uses_atomic_modeset(dev))
1221 ret = drm_client_modeset_commit_atomic(client, mode == DRM_MODE_DPMS_ON, false);
1222 else
1223 drm_client_modeset_dpms_legacy(client, mode);
1224 mutex_unlock(&client->modeset_mutex);
1225
1226 drm_master_internal_release(dev);
1227
1228 return ret;
1229}
1230EXPORT_SYMBOL(drm_client_modeset_dpms);