1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
27 #include <sys/ioctl.h>
29 #include <sys/types.h>
30 #include <systemd/sd-bus.h>
31 #include <systemd/sd-event.h>
34 /* Yuck! DRM headers need system headers included first.. but we have to
35 * include it before shared/missing.h to avoid redefining ioctl bits */
37 #include <drm_fourcc.h>
43 #include "grdev-internal.h"
45 #include "udev-util.h"
48 #define GRDRM_MAX_TRIES (16)
50 typedef struct grdrm_object grdrm_object;
51 typedef struct grdrm_plane grdrm_plane;
52 typedef struct grdrm_connector grdrm_connector;
53 typedef struct grdrm_encoder grdrm_encoder;
54 typedef struct grdrm_crtc grdrm_crtc;
56 typedef struct grdrm_fb grdrm_fb;
57 typedef struct grdrm_pipe grdrm_pipe;
58 typedef struct grdrm_card grdrm_card;
59 typedef struct unmanaged_card unmanaged_card;
60 typedef struct managed_card managed_card;
79 void (*free_fn) (grdrm_object *object);
102 struct grdrm_connector {
108 uint32_t used_encoder;
115 uint32_t max_encoders;
119 struct drm_mode_modeinfo *modes;
123 uint64_t *prop_values;
127 struct grdrm_encoder {
148 uint32_t fb_offset_x;
149 uint32_t fb_offset_y;
152 uint32_t n_used_connectors;
153 uint32_t max_used_connectors;
154 uint32_t *used_connectors;
157 struct drm_mode_modeinfo mode;
167 uint32_t n_connectors;
168 uint32_t *connectors;
171 struct drm_mode_modeinfo mode;
175 struct drm_mode_modeinfo mode;
176 uint32_t n_connectors;
177 uint32_t max_connectors;
178 uint32_t *connectors;
186 #define GRDRM_OBJECT_INIT(_card, _id, _index, _type, _free_fn) ((grdrm_object){ \
191 .free_fn = (_free_fn), \
194 grdrm_object *grdrm_find_object(grdrm_card *card, uint32_t id);
195 int grdrm_object_add(grdrm_object *object);
196 grdrm_object *grdrm_object_free(grdrm_object *object);
198 DEFINE_TRIVIAL_CLEANUP_FUNC(grdrm_object*, grdrm_object_free);
200 int grdrm_plane_new(grdrm_plane **out, grdrm_card *card, uint32_t id, uint32_t index);
201 int grdrm_connector_new(grdrm_connector **out, grdrm_card *card, uint32_t id, uint32_t index);
202 int grdrm_encoder_new(grdrm_encoder **out, grdrm_card *card, uint32_t id, uint32_t index);
203 int grdrm_crtc_new(grdrm_crtc **out, grdrm_card *card, uint32_t id, uint32_t index);
205 #define plane_from_object(_obj) container_of((_obj), grdrm_plane, object)
206 #define connector_from_object(_obj) container_of((_obj), grdrm_connector, object)
207 #define encoder_from_object(_obj) container_of((_obj), grdrm_encoder, object)
208 #define crtc_from_object(_obj) container_of((_obj), grdrm_crtc, object)
224 static int grdrm_fb_new(grdrm_fb **out, grdrm_card *card, const struct drm_mode_modeinfo *mode);
225 grdrm_fb *grdrm_fb_free(grdrm_fb *fb);
227 DEFINE_TRIVIAL_CLEANUP_FUNC(grdrm_fb*, grdrm_fb_free);
229 #define fb_from_base(_fb) container_of((_fb), grdrm_fb, base)
241 #define grdrm_pipe_from_base(_e) container_of((_e), grdrm_pipe, base)
243 #define GRDRM_PIPE_NAME_MAX (GRDRM_CARD_NAME_MAX + 1 + DECIMAL_STR_MAX(uint32_t))
245 static const grdev_pipe_vtable grdrm_pipe_vtable;
247 static int grdrm_pipe_new(grdrm_pipe **out, grdrm_crtc *crtc, struct drm_mode_modeinfo *mode, size_t n_fbs);
257 sd_event_source *fd_src;
261 uint32_t n_connectors;
266 bool async_hotplug : 1;
271 bool cap_monotonic : 1;
274 struct unmanaged_card {
279 struct managed_card {
283 sd_bus_slot *slot_pause_device;
284 sd_bus_slot *slot_resume_device;
285 sd_bus_slot *slot_take_device;
287 bool requested : 1; /* TakeDevice() was sent */
288 bool acquired : 1; /* TakeDevice() was successful */
289 bool master : 1; /* we are DRM-Master */
292 #define grdrm_card_from_base(_e) container_of((_e), grdrm_card, base)
293 #define unmanaged_card_from_base(_e) \
294 container_of(grdrm_card_from_base(_e), unmanaged_card, card)
295 #define managed_card_from_base(_e) \
296 container_of(grdrm_card_from_base(_e), managed_card, card)
298 #define GRDRM_CARD_INIT(_vtable, _session) ((grdrm_card){ \
299 .base = GRDEV_CARD_INIT((_vtable), (_session)), \
304 #define GRDRM_CARD_NAME_MAX (6 + DECIMAL_STR_MAX(unsigned) * 2)
306 static const grdev_card_vtable unmanaged_card_vtable;
307 static const grdev_card_vtable managed_card_vtable;
309 static int grdrm_card_open(grdrm_card *card, int dev_fd);
310 static void grdrm_card_close(grdrm_card *card);
311 static bool grdrm_card_async(grdrm_card *card, int r);
314 * The page-flip event of the kernel provides 64bit of arbitrary user-data. As
315 * drivers tend to drop events on intermediate deep mode-sets or because we
316 * might receive events during session activation, we try to avoid allocaing
317 * dynamic data on those events. Instead, we safe the CRTC id plus a 32bit
318 * counter in there. This way, we only get 32bit counters, not 64bit, but that
319 * should be more than enough. On the bright side, we no longer care whether we
320 * lose events. No memory leaks will occur.
321 * Modern DRM drivers might be fixed to no longer leak events, but we want to
322 * be safe. And associating dynamically allocated data with those events is
323 * kinda ugly, anyway.
326 static uint64_t grdrm_encode_vblank_data(uint32_t id, uint32_t counter) {
327 return id | ((uint64_t)counter << 32);
330 static void grdrm_decode_vblank_data(uint64_t data, uint32_t *out_id, uint32_t *out_counter) {
332 *out_id = data & 0xffffffffU;
334 *out_counter = (data >> 32) & 0xffffffffU;
337 static bool grdrm_modes_compatible(const struct drm_mode_modeinfo *a, const struct drm_mode_modeinfo *b) {
341 /* Test whether both modes are compatible according to our internal
342 * assumptions on modes. This comparison is highly dependent on how
343 * we treat modes in grdrm. If we export mode details, we need to
344 * make this comparison much stricter. */
346 if (a->hdisplay != b->hdisplay)
348 if (a->vdisplay != b->vdisplay)
350 if (a->vrefresh != b->vrefresh)
360 grdrm_object *grdrm_find_object(grdrm_card *card, uint32_t id) {
361 assert_return(card, NULL);
363 return id > 0 ? hashmap_get(card->object_map, UINT32_TO_PTR(id)) : NULL;
366 int grdrm_object_add(grdrm_object *object) {
370 assert(object->card);
371 assert(object->id > 0);
372 assert(IN_SET(object->type, GRDRM_TYPE_CRTC, GRDRM_TYPE_ENCODER, GRDRM_TYPE_CONNECTOR, GRDRM_TYPE_PLANE));
373 assert(object->free_fn);
375 if (object->index >= 32)
376 log_debug("grdrm: %s: object index exceeds 32bit masks: type=%u, index=%" PRIu32,
377 object->card->base.name, object->type, object->index);
379 r = hashmap_put(object->card->object_map, UINT32_TO_PTR(object->id), object);
386 grdrm_object *grdrm_object_free(grdrm_object *object) {
390 assert(object->card);
391 assert(object->id > 0);
392 assert(IN_SET(object->type, GRDRM_TYPE_CRTC, GRDRM_TYPE_ENCODER, GRDRM_TYPE_CONNECTOR, GRDRM_TYPE_PLANE));
393 assert(object->free_fn);
395 hashmap_remove_value(object->card->object_map, UINT32_TO_PTR(object->id), object);
397 object->free_fn(object);
405 static void plane_free(grdrm_object *object) {
406 grdrm_plane *plane = plane_from_object(object);
408 free(plane->kern.formats);
409 free(plane->kern.crtcs);
413 int grdrm_plane_new(grdrm_plane **out, grdrm_card *card, uint32_t id, uint32_t index) {
414 _cleanup_(grdrm_object_freep) grdrm_object *object = NULL;
420 plane = new0(grdrm_plane, 1);
424 object = &plane->object;
425 *object = GRDRM_OBJECT_INIT(card, id, index, GRDRM_TYPE_PLANE, plane_free);
427 plane->kern.max_crtcs = 32;
428 plane->kern.crtcs = new0(uint32_t, plane->kern.max_crtcs);
429 if (!plane->kern.crtcs)
432 plane->kern.max_formats = 32;
433 plane->kern.formats = new0(uint32_t, plane->kern.max_formats);
434 if (!plane->kern.formats)
437 r = grdrm_object_add(object);
447 static int grdrm_plane_resync(grdrm_plane *plane) {
448 grdrm_card *card = plane->object.card;
454 for (tries = 0; tries < GRDRM_MAX_TRIES; ++tries) {
455 struct drm_mode_get_plane res;
456 grdrm_object *object;
457 bool resized = false;
461 res.plane_id = plane->object.id;
462 res.format_type_ptr = PTR_TO_UINT64(plane->kern.formats);
463 res.count_format_types = plane->kern.max_formats;
465 r = ioctl(card->fd, DRM_IOCTL_MODE_GETPLANE, &res);
469 card->async_hotplug = true;
471 log_debug("grdrm: %s: plane %u removed during resync", card->base.name, plane->object.id);
473 log_debug("grdrm: %s: cannot retrieve plane %u: %m", card->base.name, plane->object.id);
479 plane->kern.n_crtcs = 0;
480 memzero(plane->kern.crtcs, sizeof(uint32_t) * plane->kern.max_crtcs);
482 HASHMAP_FOREACH(object, card->object_map, iter) {
483 if (object->type != GRDRM_TYPE_CRTC || object->index >= 32)
485 if (!(res.possible_crtcs & (1 << object->index)))
487 if (plane->kern.n_crtcs >= 32) {
488 log_debug("grdrm: %s: possible_crtcs of plane %" PRIu32 " exceeds 32bit mask",
489 card->base.name, plane->object.id);
493 plane->kern.crtcs[plane->kern.n_crtcs++] = object->id;
496 if (res.count_format_types > plane->kern.max_formats) {
499 max = ALIGN_POWER2(res.count_format_types);
500 if (!max || max > UINT16_MAX) {
501 log_debug("grdrm: %s: excessive plane resource limit: %" PRIu32, card->base.name, max);
505 t = realloc(plane->kern.formats, sizeof(*t) * max);
509 plane->kern.formats = t;
510 plane->kern.max_formats = max;
517 plane->kern.n_formats = res.count_format_types;
518 plane->kern.used_crtc = res.crtc_id;
519 plane->kern.used_fb = res.fb_id;
520 plane->kern.gamma_size = res.gamma_size;
525 if (tries >= GRDRM_MAX_TRIES) {
526 log_debug("grdrm: %s: plane %u not settled for retrieval", card->base.name, plane->object.id);
537 static void connector_free(grdrm_object *object) {
538 grdrm_connector *connector = connector_from_object(object);
540 free(connector->kern.prop_values);
541 free(connector->kern.prop_ids);
542 free(connector->kern.modes);
543 free(connector->kern.encoders);
547 int grdrm_connector_new(grdrm_connector **out, grdrm_card *card, uint32_t id, uint32_t index) {
548 _cleanup_(grdrm_object_freep) grdrm_object *object = NULL;
549 grdrm_connector *connector;
554 connector = new0(grdrm_connector, 1);
558 object = &connector->object;
559 *object = GRDRM_OBJECT_INIT(card, id, index, GRDRM_TYPE_CONNECTOR, connector_free);
561 connector->kern.max_encoders = 32;
562 connector->kern.encoders = new0(uint32_t, connector->kern.max_encoders);
563 if (!connector->kern.encoders)
566 connector->kern.max_modes = 32;
567 connector->kern.modes = new0(struct drm_mode_modeinfo, connector->kern.max_modes);
568 if (!connector->kern.modes)
571 connector->kern.max_props = 32;
572 connector->kern.prop_ids = new0(uint32_t, connector->kern.max_props);
573 connector->kern.prop_values = new0(uint64_t, connector->kern.max_props);
574 if (!connector->kern.prop_ids || !connector->kern.prop_values)
577 r = grdrm_object_add(object);
587 static int grdrm_connector_resync(grdrm_connector *connector) {
588 grdrm_card *card = connector->object.card;
594 for (tries = 0; tries < GRDRM_MAX_TRIES; ++tries) {
595 struct drm_mode_get_connector res;
596 bool resized = false;
600 res.connector_id = connector->object.id;
601 res.encoders_ptr = PTR_TO_UINT64(connector->kern.encoders);
602 res.props_ptr = PTR_TO_UINT64(connector->kern.prop_ids);
603 res.prop_values_ptr = PTR_TO_UINT64(connector->kern.prop_values);
604 res.count_encoders = connector->kern.max_encoders;
605 res.count_props = connector->kern.max_props;
607 /* The kernel reads modes from the EDID information only if we
608 * pass count_modes==0. This is a legacy hack for libdrm (which
609 * called every ioctl twice). Now we have to adopt.. *sigh*.
610 * If we never received an hotplug event, there's no reason to
611 * sync modes. EDID reads are heavy, so skip that if not
615 res.modes_ptr = PTR_TO_UINT64(connector->kern.modes);
616 res.count_modes = connector->kern.max_modes;
622 r = ioctl(card->fd, DRM_IOCTL_MODE_GETCONNECTOR, &res);
626 card->async_hotplug = true;
628 log_debug("grdrm: %s: connector %u removed during resync", card->base.name, connector->object.id);
630 log_debug("grdrm: %s: cannot retrieve connector %u: %m", card->base.name, connector->object.id);
636 if (res.count_encoders > connector->kern.max_encoders) {
639 max = ALIGN_POWER2(res.count_encoders);
640 if (!max || max > UINT16_MAX) {
641 log_debug("grdrm: %s: excessive connector resource limit: %" PRIu32, card->base.name, max);
645 t = realloc(connector->kern.encoders, sizeof(*t) * max);
649 connector->kern.encoders = t;
650 connector->kern.max_encoders = max;
654 if (res.count_modes > connector->kern.max_modes) {
655 struct drm_mode_modeinfo *t;
657 max = ALIGN_POWER2(res.count_modes);
658 if (!max || max > UINT16_MAX) {
659 log_debug("grdrm: %s: excessive connector resource limit: %" PRIu32, card->base.name, max);
663 t = realloc(connector->kern.modes, sizeof(*t) * max);
667 connector->kern.modes = t;
668 connector->kern.max_modes = max;
672 if (res.count_props > connector->kern.max_props) {
676 max = ALIGN_POWER2(res.count_props);
677 if (!max || max > UINT16_MAX) {
678 log_debug("grdrm: %s: excessive connector resource limit: %" PRIu32, card->base.name, max);
682 tids = realloc(connector->kern.prop_ids, sizeof(*tids) * max);
685 connector->kern.prop_ids = tids;
687 tvals = realloc(connector->kern.prop_values, sizeof(*tvals) * max);
690 connector->kern.prop_values = tvals;
692 connector->kern.max_props = max;
699 connector->kern.n_encoders = res.count_encoders;
700 connector->kern.n_props = res.count_props;
701 connector->kern.type = res.connector_type;
702 connector->kern.type_id = res.connector_type_id;
703 connector->kern.used_encoder = res.encoder_id;
704 connector->kern.connection = res.connection;
705 connector->kern.mm_width = res.mm_width;
706 connector->kern.mm_height = res.mm_height;
707 connector->kern.subpixel = res.subpixel;
708 if (res.modes_ptr == PTR_TO_UINT64(connector->kern.modes))
709 connector->kern.n_modes = res.count_modes;
714 if (tries >= GRDRM_MAX_TRIES) {
715 log_debug("grdrm: %s: connector %u not settled for retrieval", card->base.name, connector->object.id);
726 static void encoder_free(grdrm_object *object) {
727 grdrm_encoder *encoder = encoder_from_object(object);
729 free(encoder->kern.clones);
730 free(encoder->kern.crtcs);
734 int grdrm_encoder_new(grdrm_encoder **out, grdrm_card *card, uint32_t id, uint32_t index) {
735 _cleanup_(grdrm_object_freep) grdrm_object *object = NULL;
736 grdrm_encoder *encoder;
741 encoder = new0(grdrm_encoder, 1);
745 object = &encoder->object;
746 *object = GRDRM_OBJECT_INIT(card, id, index, GRDRM_TYPE_ENCODER, encoder_free);
748 encoder->kern.max_crtcs = 32;
749 encoder->kern.crtcs = new0(uint32_t, encoder->kern.max_crtcs);
750 if (!encoder->kern.crtcs)
753 encoder->kern.max_clones = 32;
754 encoder->kern.clones = new0(uint32_t, encoder->kern.max_clones);
755 if (!encoder->kern.clones)
758 r = grdrm_object_add(object);
768 static int grdrm_encoder_resync(grdrm_encoder *encoder) {
769 grdrm_card *card = encoder->object.card;
770 struct drm_mode_get_encoder res;
771 grdrm_object *object;
778 res.encoder_id = encoder->object.id;
780 r = ioctl(card->fd, DRM_IOCTL_MODE_GETENCODER, &res);
784 card->async_hotplug = true;
786 log_debug("grdrm: %s: encoder %u removed during resync", card->base.name, encoder->object.id);
788 log_debug("grdrm: %s: cannot retrieve encoder %u: %m", card->base.name, encoder->object.id);
794 encoder->kern.type = res.encoder_type;
795 encoder->kern.used_crtc = res.crtc_id;
797 encoder->kern.n_crtcs = 0;
798 memzero(encoder->kern.crtcs, sizeof(uint32_t) * encoder->kern.max_crtcs);
800 HASHMAP_FOREACH(object, card->object_map, iter) {
801 if (object->type != GRDRM_TYPE_CRTC || object->index >= 32)
803 if (!(res.possible_crtcs & (1 << object->index)))
805 if (encoder->kern.n_crtcs >= 32) {
806 log_debug("grdrm: %s: possible_crtcs exceeds 32bit mask", card->base.name);
810 encoder->kern.crtcs[encoder->kern.n_crtcs++] = object->id;
813 encoder->kern.n_clones = 0;
814 memzero(encoder->kern.clones, sizeof(uint32_t) * encoder->kern.max_clones);
816 HASHMAP_FOREACH(object, card->object_map, iter) {
817 if (object->type != GRDRM_TYPE_ENCODER || object->index >= 32)
819 if (!(res.possible_clones & (1 << object->index)))
821 if (encoder->kern.n_clones >= 32) {
822 log_debug("grdrm: %s: possible_encoders exceeds 32bit mask", card->base.name);
826 encoder->kern.clones[encoder->kern.n_clones++] = object->id;
836 static void crtc_free(grdrm_object *object) {
837 grdrm_crtc *crtc = crtc_from_object(object);
840 grdev_pipe_free(&crtc->pipe->base);
841 free(crtc->set.connectors);
842 free(crtc->old.connectors);
843 free(crtc->kern.used_connectors);
847 int grdrm_crtc_new(grdrm_crtc **out, grdrm_card *card, uint32_t id, uint32_t index) {
848 _cleanup_(grdrm_object_freep) grdrm_object *object = NULL;
854 crtc = new0(grdrm_crtc, 1);
858 object = &crtc->object;
859 *object = GRDRM_OBJECT_INIT(card, id, index, GRDRM_TYPE_CRTC, crtc_free);
861 crtc->kern.max_used_connectors = 32;
862 crtc->kern.used_connectors = new0(uint32_t, crtc->kern.max_used_connectors);
863 if (!crtc->kern.used_connectors)
866 crtc->old.connectors = new0(uint32_t, crtc->kern.max_used_connectors);
867 if (!crtc->old.connectors)
870 r = grdrm_object_add(object);
880 static int grdrm_crtc_resync(grdrm_crtc *crtc) {
881 grdrm_card *card = crtc->object.card;
882 struct drm_mode_crtc res = { .crtc_id = crtc->object.id };
887 /* make sure we can cache any combination later */
888 if (card->n_connectors > crtc->kern.max_used_connectors) {
891 max = ALIGN_POWER2(card->n_connectors);
895 t = realloc_multiply(crtc->kern.used_connectors, sizeof(*t), max);
899 crtc->kern.used_connectors = t;
900 crtc->kern.max_used_connectors = max;
902 if (!crtc->old.set) {
903 crtc->old.connectors = calloc(sizeof(*t), max);
904 if (!crtc->old.connectors)
909 /* GETCRTC doesn't return connectors. We have to read all
910 * encoder-state and deduce the setup ourselves.. */
911 crtc->kern.n_used_connectors = 0;
913 r = ioctl(card->fd, DRM_IOCTL_MODE_GETCRTC, &res);
917 card->async_hotplug = true;
919 log_debug("grdrm: %s: crtc %u removed during resync", card->base.name, crtc->object.id);
921 log_debug("grdrm: %s: cannot retrieve crtc %u: %m", card->base.name, crtc->object.id);
927 crtc->kern.used_fb = res.fb_id;
928 crtc->kern.fb_offset_x = res.x;
929 crtc->kern.fb_offset_y = res.y;
930 crtc->kern.gamma_size = res.gamma_size;
931 crtc->kern.mode_set = res.mode_valid;
932 crtc->kern.mode = res.mode;
937 static void grdrm_crtc_assign(grdrm_crtc *crtc, grdrm_connector *connector) {
938 uint32_t n_connectors;
942 assert(!crtc->object.assigned);
943 assert(!connector || !connector->object.assigned);
945 /* always mark both as assigned; even if assignments cannot be set */
946 crtc->object.assigned = true;
948 connector->object.assigned = true;
950 /* we will support hw clone mode in the future */
951 n_connectors = connector ? 1 : 0;
953 /* bail out if configuration is preserved */
954 if (crtc->set.n_connectors == n_connectors &&
955 (n_connectors == 0 || crtc->set.connectors[0] == connector->object.id))
958 crtc->applied = false;
959 crtc->set.n_connectors = 0;
961 if (n_connectors > crtc->set.max_connectors) {
964 max = ALIGN_POWER2(n_connectors);
970 t = realloc(crtc->set.connectors, sizeof(*t) * max);
976 crtc->set.connectors = t;
977 crtc->set.max_connectors = max;
981 struct drm_mode_modeinfo *m, *pref = NULL;
984 for (i = 0; i < connector->kern.n_modes; ++i) {
985 m = &connector->kern.modes[i];
987 /* ignore 3D modes by default */
988 if (m->flags & DRM_MODE_FLAG_3D_MASK)
996 /* use PREFERRED over non-PREFERRED */
997 if ((pref->type & DRM_MODE_TYPE_PREFERRED) &&
998 !(m->type & DRM_MODE_TYPE_PREFERRED))
1001 /* use DRIVER over non-PREFERRED|DRIVER */
1002 if ((pref->type & DRM_MODE_TYPE_DRIVER) &&
1003 !(m->type & (DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED)))
1006 /* always prefer higher resolution */
1007 if (pref->hdisplay > m->hdisplay ||
1008 (pref->hdisplay == m->hdisplay && pref->vdisplay > m->vdisplay))
1015 crtc->set.mode = *pref;
1016 crtc->set.n_connectors = 1;
1017 crtc->set.connectors[0] = connector->object.id;
1018 log_debug("grdrm: %s: assigned connector %" PRIu32 " to crtc %" PRIu32 " with mode %s",
1019 crtc->object.card->base.name, connector->object.id, crtc->object.id, pref->name);
1021 log_debug("grdrm: %s: connector %" PRIu32 " to be assigned but has no valid mode",
1022 crtc->object.card->base.name, connector->object.id);
1029 log_debug("grdrm: %s: cannot assign crtc %" PRIu32 ": %s",
1030 crtc->object.card->base.name, crtc->object.id, strerror(-r));
1033 static void grdrm_crtc_expose(grdrm_crtc *crtc) {
1040 assert(crtc->object.assigned);
1042 if (crtc->set.n_connectors < 1) {
1044 grdev_pipe_free(&crtc->pipe->base);
1051 if (pipe->base.width != crtc->set.mode.hdisplay ||
1052 pipe->base.height != crtc->set.mode.vdisplay ||
1053 pipe->base.vrefresh != crtc->set.mode.vrefresh) {
1054 grdev_pipe_free(&pipe->base);
1061 pipe->base.front = NULL;
1062 pipe->base.back = NULL;
1063 for (i = 0; i < pipe->base.max_fbs; ++i) {
1064 fb = fb_from_base(pipe->base.fbs[i]);
1065 if (fb->id == crtc->kern.used_fb)
1066 pipe->base.front = &fb->base;
1067 else if (!fb->flipid)
1068 pipe->base.back = &fb->base;
1071 r = grdrm_pipe_new(&pipe, crtc, &crtc->set.mode, 2);
1073 log_debug("grdrm: %s: cannot create pipe for crtc %" PRIu32 ": %s",
1074 crtc->object.card->base.name, crtc->object.id, strerror(-r));
1078 for (i = 0; i < pipe->base.max_fbs; ++i) {
1079 r = grdrm_fb_new(&fb, crtc->object.card, &crtc->set.mode);
1081 log_debug("grdrm: %s: cannot allocate framebuffer for crtc %" PRIu32 ": %s",
1082 crtc->object.card->base.name, crtc->object.id, strerror(-r));
1083 grdev_pipe_free(&pipe->base);
1087 pipe->base.fbs[i] = &fb->base;
1090 pipe->base.front = NULL;
1091 pipe->base.back = pipe->base.fbs[0];
1095 grdev_pipe_ready(&crtc->pipe->base, true);
1098 static void grdrm_crtc_commit_deep(grdrm_crtc *crtc, grdev_fb **slot) {
1099 struct drm_mode_crtc set_crtc = { .crtc_id = crtc->object.id };
1100 grdrm_card *card = crtc->object.card;
1101 grdrm_pipe *pipe = crtc->pipe;
1102 grdrm_fb *fb = fb_from_base(*slot);
1111 set_crtc.set_connectors_ptr = PTR_TO_UINT64(crtc->set.connectors);
1112 set_crtc.count_connectors = crtc->set.n_connectors;
1113 set_crtc.fb_id = fb->id;
1116 set_crtc.mode_valid = 1;
1117 set_crtc.mode = crtc->set.mode;
1119 r = ioctl(card->fd, DRM_IOCTL_MODE_SETCRTC, &set_crtc);
1122 log_debug("grdrm: %s: cannot set crtc %" PRIu32 ": %m",
1123 card->base.name, crtc->object.id);
1125 grdrm_card_async(card, r);
1129 if (!crtc->applied) {
1130 log_debug("grdrm: %s: crtc %" PRIu32 " applied via deep modeset",
1131 card->base.name, crtc->object.id);
1132 crtc->applied = true;
1136 pipe->base.front = &fb->base;
1139 pipe->base.flipping = false;
1140 pipe->base.flip = false;
1142 /* We cannot schedule dummy page-flips on pipes, hence, the
1143 * application would have to schedule their own frame-timers.
1144 * To avoid duplicating that everywhere, we schedule our own
1145 * timer and raise a fake FRAME event when it fires. */
1146 grdev_pipe_schedule(&pipe->base, 1);
1148 if (!pipe->base.back) {
1149 for (i = 0; i < pipe->base.max_fbs; ++i) {
1150 if (!pipe->base.fbs[i])
1153 fb = fb_from_base(pipe->base.fbs[i]);
1154 if (&fb->base == pipe->base.front)
1158 pipe->base.back = &fb->base;
1164 static int grdrm_crtc_commit_flip(grdrm_crtc *crtc, grdev_fb **slot) {
1165 struct drm_mode_crtc_page_flip page_flip = { .crtc_id = crtc->object.id };
1166 grdrm_card *card = crtc->object.card;
1167 grdrm_pipe *pipe = crtc->pipe;
1168 grdrm_fb *fb = fb_from_base(*slot);
1178 if (!crtc->applied && !grdrm_modes_compatible(&crtc->kern.mode, &crtc->set.mode))
1181 cnt = ++pipe->counter ? : ++pipe->counter;
1182 page_flip.fb_id = fb->id;
1183 page_flip.flags = DRM_MODE_PAGE_FLIP_EVENT;
1184 page_flip.user_data = grdrm_encode_vblank_data(crtc->object.id, cnt);
1186 r = ioctl(card->fd, DRM_IOCTL_MODE_PAGE_FLIP, &page_flip);
1189 /* Avoid excessive logging on EINVAL; it is currently not
1190 * possible to see whether cards support page-flipping, so
1191 * avoid logging on each frame. */
1193 log_debug("grdrm: %s: cannot schedule page-flip on crtc %" PRIu32 ": %m",
1194 card->base.name, crtc->object.id);
1196 if (grdrm_card_async(card, r))
1202 if (!crtc->applied) {
1203 log_debug("grdrm: %s: crtc %" PRIu32 " applied via page flip",
1204 card->base.name, crtc->object.id);
1205 crtc->applied = true;
1208 pipe->base.flipping = true;
1209 pipe->base.flip = false;
1210 pipe->counter = cnt;
1214 /* Raise fake FRAME event if it takes longer than 2
1215 * frames to receive the pageflip event. We assume the
1216 * queue ran over or some other error happened. */
1217 grdev_pipe_schedule(&pipe->base, 2);
1219 if (!pipe->base.back) {
1220 for (i = 0; i < pipe->base.max_fbs; ++i) {
1221 if (!pipe->base.fbs[i])
1224 fb = fb_from_base(pipe->base.fbs[i]);
1225 if (&fb->base == pipe->base.front)
1230 pipe->base.back = &fb->base;
1238 static void grdrm_crtc_commit(grdrm_crtc *crtc) {
1239 struct drm_mode_crtc set_crtc = { .crtc_id = crtc->object.id };
1240 grdrm_card *card = crtc->object.card;
1246 assert(crtc->object.assigned);
1250 /* If a crtc is not assigned any connector, we want any
1251 * previous setup to be cleared, so make sure the CRTC is
1252 * disabled. Otherwise, there might be content on the CRTC
1253 * while we run, which is not what we want.
1254 * If you want to avoid modesets on specific CRTCs, you should
1255 * still keep their assignment, but never enable the resulting
1256 * pipe. This way, we wouldn't touch it at all. */
1257 if (!crtc->applied) {
1258 crtc->applied = true;
1259 r = ioctl(card->fd, DRM_IOCTL_MODE_SETCRTC, &set_crtc);
1262 log_debug("grdrm: %s: cannot shutdown crtc %" PRIu32 ": %m",
1263 card->base.name, crtc->object.id);
1265 grdrm_card_async(card, r);
1269 log_debug("grdrm: %s: crtc %" PRIu32 " applied via shutdown",
1270 card->base.name, crtc->object.id);
1276 /* we always fully ignore disabled pipes */
1277 if (!pipe->base.enabled)
1280 assert(crtc->set.n_connectors > 0);
1282 if (pipe->base.flip)
1283 slot = &pipe->base.back;
1284 else if (!crtc->applied)
1285 slot = &pipe->base.front;
1292 r = grdrm_crtc_commit_flip(crtc, slot);
1294 /* in case we couldn't page-flip, perform deep modeset */
1295 grdrm_crtc_commit_deep(crtc, slot);
1299 static void grdrm_crtc_restore(grdrm_crtc *crtc) {
1300 struct drm_mode_crtc set_crtc = { .crtc_id = crtc->object.id };
1301 grdrm_card *card = crtc->object.card;
1307 set_crtc.set_connectors_ptr = PTR_TO_UINT64(crtc->old.connectors);
1308 set_crtc.count_connectors = crtc->old.n_connectors;
1309 set_crtc.fb_id = crtc->old.fb;
1310 set_crtc.x = crtc->old.fb_x;
1311 set_crtc.y = crtc->old.fb_y;
1312 set_crtc.gamma_size = crtc->old.gamma;
1313 set_crtc.mode_valid = crtc->old.mode_set;
1314 set_crtc.mode = crtc->old.mode;
1316 r = ioctl(card->fd, DRM_IOCTL_MODE_SETCRTC, &set_crtc);
1319 log_debug("grdrm: %s: cannot restore crtc %" PRIu32 ": %m",
1320 card->base.name, crtc->object.id);
1322 grdrm_card_async(card, r);
1327 ++crtc->pipe->counter;
1328 crtc->pipe->base.front = NULL;
1329 crtc->pipe->base.flipping = false;
1332 log_debug("grdrm: %s: crtc %" PRIu32 " restored", card->base.name, crtc->object.id);
1335 static void grdrm_crtc_flip_complete(grdrm_crtc *crtc, uint32_t counter, struct drm_event_vblank *event) {
1336 bool flipped = false;
1338 grdrm_fb *back = NULL;
1348 /* We got a page-flip event. To be safe, we reset all FBs on the same
1349 * pipe that have smaller flipids than the flip we got as we know they
1350 * are executed in order. We need to do this to guarantee
1351 * queue-overflows or other missed events don't cause starvation.
1352 * Furthermore, if we find the exact FB this event is for, *and* this
1353 * is the most recent event, we mark it as front FB and raise a
1356 for (i = 0; i < pipe->base.max_fbs; ++i) {
1359 if (!pipe->base.fbs[i])
1362 fb = fb_from_base(pipe->base.fbs[i]);
1363 if (counter != 0 && counter == pipe->counter && fb->flipid == counter) {
1364 pipe->base.front = &fb->base;
1368 if (counter - fb->flipid < UINT16_MAX) {
1371 } else if (fb->flipid == 0) {
1376 if (!pipe->base.back)
1377 pipe->base.back = &back->base;
1380 crtc->pipe->base.flipping = false;
1381 grdev_pipe_frame(&pipe->base);
1389 static int grdrm_fb_new(grdrm_fb **out, grdrm_card *card, const struct drm_mode_modeinfo *mode) {
1390 _cleanup_(grdrm_fb_freep) grdrm_fb *fb = NULL;
1391 struct drm_mode_create_dumb create_dumb = { };
1392 struct drm_mode_map_dumb map_dumb = { };
1393 struct drm_mode_fb_cmd2 add_fb = { };
1397 assert_return(out, -EINVAL);
1398 assert_return(card, -EINVAL);
1400 fb = new0(grdrm_fb, 1);
1404 /* TODO: we should choose a compatible format of the previous CRTC
1405 * setting to allow page-flip to it. Only choose fallback if the
1406 * previous setting was crap (non xrgb32'ish). */
1409 fb->base.format = DRM_FORMAT_XRGB8888;
1410 fb->base.width = mode->hdisplay;
1411 fb->base.height = mode->vdisplay;
1413 for (i = 0; i < ELEMENTSOF(fb->base.maps); ++i)
1414 fb->base.maps[i] = MAP_FAILED;
1416 create_dumb.width = fb->base.width;
1417 create_dumb.height = fb->base.height;
1418 create_dumb.bpp = 32;
1420 r = ioctl(card->fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
1423 log_debug("grdrm: %s: cannot create dumb buffer %" PRIu32 "x%" PRIu32": %m",
1424 card->base.name, fb->base.width, fb->base.height);
1428 fb->handles[0] = create_dumb.handle;
1429 fb->base.strides[0] = create_dumb.pitch;
1430 fb->sizes[0] = create_dumb.size;
1432 map_dumb.handle = fb->handles[0];
1434 r = ioctl(card->fd, DRM_IOCTL_MODE_MAP_DUMB, &map_dumb);
1437 log_debug("grdrm: %s: cannot map dumb buffer %" PRIu32 "x%" PRIu32": %m",
1438 card->base.name, fb->base.width, fb->base.height);
1442 fb->base.maps[0] = mmap(0, fb->sizes[0], PROT_WRITE, MAP_SHARED, card->fd, map_dumb.offset);
1443 if (fb->base.maps[0] == MAP_FAILED) {
1445 log_debug("grdrm: %s: cannot memory-map dumb buffer %" PRIu32 "x%" PRIu32": %m",
1446 card->base.name, fb->base.width, fb->base.height);
1450 memzero(fb->base.maps[0], fb->sizes[0]);
1452 add_fb.width = fb->base.width;
1453 add_fb.height = fb->base.height;
1454 add_fb.pixel_format = fb->base.format;
1456 memcpy(add_fb.handles, fb->handles, sizeof(fb->handles));
1457 memcpy(add_fb.pitches, fb->base.strides, sizeof(fb->base.strides));
1458 memcpy(add_fb.offsets, fb->offsets, sizeof(fb->offsets));
1460 r = ioctl(card->fd, DRM_IOCTL_MODE_ADDFB2, &add_fb);
1463 log_debug("grdrm: %s: cannot add framebuffer %" PRIu32 "x%" PRIu32": %m",
1464 card->base.name, fb->base.width, fb->base.height);
1468 fb->id = add_fb.fb_id;
1475 grdrm_fb *grdrm_fb_free(grdrm_fb *fb) {
1483 if (fb->id > 0 && fb->card->fd >= 0)
1484 ioctl(fb->card->fd, DRM_IOCTL_MODE_RMFB, fb->id);
1486 for (i = 0; i < ELEMENTSOF(fb->handles); ++i) {
1487 struct drm_mode_destroy_dumb destroy_dumb = { };
1489 if (fb->base.maps[i] != MAP_FAILED)
1490 munmap(fb->base.maps[i], fb->sizes[i]);
1492 if (fb->handles[i] > 0 && fb->card->fd >= 0) {
1493 destroy_dumb.handle = fb->handles[i];
1494 ioctl(fb->card->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb);
1507 static void grdrm_pipe_name(char *out, grdrm_crtc *crtc) {
1508 /* @out must be at least of size GRDRM_PIPE_NAME_MAX */
1509 sprintf(out, "%s/%" PRIu32, crtc->object.card->base.name, crtc->object.id);
1512 static int grdrm_pipe_new(grdrm_pipe **out, grdrm_crtc *crtc, struct drm_mode_modeinfo *mode, size_t n_fbs) {
1513 _cleanup_(grdev_pipe_freep) grdev_pipe *basepipe = NULL;
1514 grdrm_card *card = crtc->object.card;
1515 char name[GRDRM_PIPE_NAME_MAX];
1519 assert_return(crtc, -EINVAL);
1520 assert_return(grdev_is_drm_card(&card->base), -EINVAL);
1522 pipe = new0(grdrm_pipe, 1);
1526 basepipe = &pipe->base;
1527 pipe->base = GRDEV_PIPE_INIT(&grdrm_pipe_vtable, &card->base);
1529 pipe->base.width = mode->hdisplay;
1530 pipe->base.height = mode->vdisplay;
1531 pipe->base.vrefresh = mode->vrefresh ? : 25;
1533 grdrm_pipe_name(name, crtc);
1534 r = grdev_pipe_add(&pipe->base, name, n_fbs);
1544 static void grdrm_pipe_free(grdev_pipe *basepipe) {
1545 grdrm_pipe *pipe = grdrm_pipe_from_base(basepipe);
1550 for (i = 0; i < pipe->base.max_fbs; ++i)
1551 if (pipe->base.fbs[i])
1552 grdrm_fb_free(fb_from_base(pipe->base.fbs[i]));
1557 static const grdev_pipe_vtable grdrm_pipe_vtable = {
1558 .free = grdrm_pipe_free,
1565 static void grdrm_name(char *out, dev_t devnum) {
1566 /* @out must be at least of size GRDRM_CARD_NAME_MAX */
1567 sprintf(out, "drm/%u:%u", major(devnum), minor(devnum));
1570 static void grdrm_card_print(grdrm_card *card) {
1571 grdrm_object *object;
1573 grdrm_encoder *encoder;
1574 grdrm_connector *connector;
1580 log_debug("grdrm: %s: state dump", card->base.name);
1582 log_debug(" crtcs:");
1583 HASHMAP_FOREACH(object, card->object_map, iter) {
1584 if (object->type != GRDRM_TYPE_CRTC)
1587 crtc = crtc_from_object(object);
1588 log_debug(" (id: %u index: %d)", object->id, object->index);
1590 if (crtc->kern.mode_set)
1591 log_debug(" mode: %dx%d", crtc->kern.mode.hdisplay, crtc->kern.mode.vdisplay);
1593 log_debug(" mode: <none>");
1596 log_debug(" encoders:");
1597 HASHMAP_FOREACH(object, card->object_map, iter) {
1598 if (object->type != GRDRM_TYPE_ENCODER)
1601 encoder = encoder_from_object(object);
1602 log_debug(" (id: %u index: %d)", object->id, object->index);
1604 if (encoder->kern.used_crtc)
1605 log_debug(" crtc: %u", encoder->kern.used_crtc);
1607 log_debug(" crtc: <none>");
1609 buf = malloc((DECIMAL_STR_MAX(uint32_t) + 1) * encoder->kern.n_crtcs + 1);
1614 for (i = 0; i < encoder->kern.n_crtcs; ++i)
1615 p += sprintf(p, " %" PRIu32, encoder->kern.crtcs[i]);
1617 log_debug(" possible crtcs:%s", buf);
1621 buf = malloc((DECIMAL_STR_MAX(uint32_t) + 1) * encoder->kern.n_clones + 1);
1626 for (i = 0; i < encoder->kern.n_clones; ++i)
1627 p += sprintf(p, " %" PRIu32, encoder->kern.clones[i]);
1629 log_debug(" possible clones:%s", buf);
1634 log_debug(" connectors:");
1635 HASHMAP_FOREACH(object, card->object_map, iter) {
1636 if (object->type != GRDRM_TYPE_CONNECTOR)
1639 connector = connector_from_object(object);
1640 log_debug(" (id: %u index: %d)", object->id, object->index);
1641 log_debug(" type: %" PRIu32 "-%" PRIu32 " connection: %" PRIu32 " subpixel: %" PRIu32 " extents: %" PRIu32 "x%" PRIu32,
1642 connector->kern.type, connector->kern.type_id, connector->kern.connection, connector->kern.subpixel,
1643 connector->kern.mm_width, connector->kern.mm_height);
1645 if (connector->kern.used_encoder)
1646 log_debug(" encoder: %" PRIu32, connector->kern.used_encoder);
1648 log_debug(" encoder: <none>");
1650 buf = malloc((DECIMAL_STR_MAX(uint32_t) + 1) * connector->kern.n_encoders + 1);
1655 for (i = 0; i < connector->kern.n_encoders; ++i)
1656 p += sprintf(p, " %" PRIu32, connector->kern.encoders[i]);
1658 log_debug(" possible encoders:%s", buf);
1662 for (i = 0; i < connector->kern.n_modes; ++i) {
1663 struct drm_mode_modeinfo *mode = &connector->kern.modes[i];
1664 log_debug(" mode: %" PRIu32 "x%" PRIu32, mode->hdisplay, mode->vdisplay);
1668 log_debug(" planes:");
1669 HASHMAP_FOREACH(object, card->object_map, iter) {
1670 if (object->type != GRDRM_TYPE_PLANE)
1673 plane = plane_from_object(object);
1674 log_debug(" (id: %u index: %d)", object->id, object->index);
1675 log_debug(" gamma-size: %" PRIu32, plane->kern.gamma_size);
1677 if (plane->kern.used_crtc)
1678 log_debug(" crtc: %" PRIu32, plane->kern.used_crtc);
1680 log_debug(" crtc: <none>");
1682 buf = malloc((DECIMAL_STR_MAX(uint32_t) + 1) * plane->kern.n_crtcs + 1);
1687 for (i = 0; i < plane->kern.n_crtcs; ++i)
1688 p += sprintf(p, " %" PRIu32, plane->kern.crtcs[i]);
1690 log_debug(" possible crtcs:%s", buf);
1694 buf = malloc((DECIMAL_STR_MAX(unsigned int) + 3) * plane->kern.n_formats + 1);
1699 for (i = 0; i < plane->kern.n_formats; ++i)
1700 p += sprintf(p, " 0x%x", (unsigned int)plane->kern.formats[i]);
1702 log_debug(" possible formats:%s", buf);
1708 static int grdrm_card_resync(grdrm_card *card) {
1709 _cleanup_free_ uint32_t *crtc_ids = NULL, *encoder_ids = NULL, *connector_ids = NULL, *plane_ids = NULL;
1710 uint32_t allocated = 0;
1711 grdrm_object *object;
1718 card->async_hotplug = false;
1721 /* mark existing objects for possible removal */
1722 HASHMAP_FOREACH(object, card->object_map, iter)
1723 object->present = false;
1725 for (tries = 0; tries < GRDRM_MAX_TRIES; ++tries) {
1726 struct drm_mode_get_plane_res pres;
1727 struct drm_mode_card_res res;
1730 if (allocated < card->max_ids) {
1733 free(connector_ids);
1735 crtc_ids = new0(uint32_t, card->max_ids);
1736 encoder_ids = new0(uint32_t, card->max_ids);
1737 connector_ids = new0(uint32_t, card->max_ids);
1738 plane_ids = new0(uint32_t, card->max_ids);
1740 if (!crtc_ids || !encoder_ids || !connector_ids || !plane_ids)
1743 allocated = card->max_ids;
1747 res.crtc_id_ptr = PTR_TO_UINT64(crtc_ids);
1748 res.connector_id_ptr = PTR_TO_UINT64(connector_ids);
1749 res.encoder_id_ptr = PTR_TO_UINT64(encoder_ids);
1750 res.count_crtcs = allocated;
1751 res.count_encoders = allocated;
1752 res.count_connectors = allocated;
1754 r = ioctl(card->fd, DRM_IOCTL_MODE_GETRESOURCES, &res);
1757 log_debug("grdrm: %s: cannot retrieve drm resources: %m", card->base.name);
1762 pres.plane_id_ptr = PTR_TO_UINT64(plane_ids);
1763 pres.count_planes = allocated;
1765 r = ioctl(card->fd, DRM_IOCTL_MODE_GETPLANERESOURCES, &pres);
1768 log_debug("grdrm: %s: cannot retrieve drm plane-resources: %m", card->base.name);
1772 max = MAX(MAX(res.count_crtcs, res.count_encoders),
1773 MAX(res.count_connectors, pres.count_planes));
1774 if (max > allocated) {
1777 n = ALIGN_POWER2(max);
1778 if (!n || n > UINT16_MAX) {
1779 log_debug("grdrm: %s: excessive DRM resource limit: %" PRIu32, card->base.name, max);
1783 /* retry with resized buffers */
1788 /* mark available objects as present */
1790 for (i = 0; i < res.count_crtcs; ++i) {
1791 object = grdrm_find_object(card, crtc_ids[i]);
1792 if (object && object->type == GRDRM_TYPE_CRTC) {
1793 object->present = true;
1799 for (i = 0; i < res.count_encoders; ++i) {
1800 object = grdrm_find_object(card, encoder_ids[i]);
1801 if (object && object->type == GRDRM_TYPE_ENCODER) {
1802 object->present = true;
1808 for (i = 0; i < res.count_connectors; ++i) {
1809 object = grdrm_find_object(card, connector_ids[i]);
1810 if (object && object->type == GRDRM_TYPE_CONNECTOR) {
1811 object->present = true;
1813 connector_ids[i] = 0;
1817 for (i = 0; i < pres.count_planes; ++i) {
1818 object = grdrm_find_object(card, plane_ids[i]);
1819 if (object && object->type == GRDRM_TYPE_PLANE) {
1820 object->present = true;
1826 /* drop removed objects */
1828 HASHMAP_FOREACH(object, card->object_map, iter)
1829 if (!object->present)
1830 grdrm_object_free(object);
1832 /* add new objects */
1834 card->n_crtcs = res.count_crtcs;
1835 for (i = 0; i < res.count_crtcs; ++i) {
1836 if (crtc_ids[i] < 1)
1839 r = grdrm_crtc_new(NULL, card, crtc_ids[i], i);
1844 card->n_encoders = res.count_encoders;
1845 for (i = 0; i < res.count_encoders; ++i) {
1846 if (encoder_ids[i] < 1)
1849 r = grdrm_encoder_new(NULL, card, encoder_ids[i], i);
1854 card->n_connectors = res.count_connectors;
1855 for (i = 0; i < res.count_connectors; ++i) {
1856 if (connector_ids[i] < 1)
1859 r = grdrm_connector_new(NULL, card, connector_ids[i], i);
1864 card->n_planes = pres.count_planes;
1865 for (i = 0; i < pres.count_planes; ++i) {
1866 if (plane_ids[i] < 1)
1869 r = grdrm_plane_new(NULL, card, plane_ids[i], i);
1874 /* re-sync objects after object_map is synced */
1876 HASHMAP_FOREACH(object, card->object_map, iter) {
1877 switch (object->type) {
1878 case GRDRM_TYPE_CRTC:
1879 r = grdrm_crtc_resync(crtc_from_object(object));
1881 case GRDRM_TYPE_ENCODER:
1882 r = grdrm_encoder_resync(encoder_from_object(object));
1884 case GRDRM_TYPE_CONNECTOR:
1885 r = grdrm_connector_resync(connector_from_object(object));
1887 case GRDRM_TYPE_PLANE:
1888 r = grdrm_plane_resync(plane_from_object(object));
1891 assert_not_reached("grdrm: invalid object type");
1898 if (card->async_hotplug)
1902 /* if modeset objects change during sync, start over */
1903 if (card->async_hotplug) {
1904 card->async_hotplug = false;
1908 /* cache crtc/connector relationship */
1909 HASHMAP_FOREACH(object, card->object_map, iter) {
1910 grdrm_connector *connector;
1911 grdrm_encoder *encoder;
1914 if (object->type != GRDRM_TYPE_CONNECTOR)
1917 connector = connector_from_object(object);
1918 if (connector->kern.connection != 1 || connector->kern.used_encoder < 1)
1921 object = grdrm_find_object(card, connector->kern.used_encoder);
1922 if (!object || object->type != GRDRM_TYPE_ENCODER)
1925 encoder = encoder_from_object(object);
1926 if (encoder->kern.used_crtc < 1)
1929 object = grdrm_find_object(card, encoder->kern.used_crtc);
1930 if (!object || object->type != GRDRM_TYPE_CRTC)
1933 crtc = crtc_from_object(object);
1934 assert(crtc->kern.n_used_connectors < crtc->kern.max_used_connectors);
1935 crtc->kern.used_connectors[crtc->kern.n_used_connectors++] = connector->object.id;
1938 /* cache old crtc settings for later restore */
1939 HASHMAP_FOREACH(object, card->object_map, iter) {
1942 if (object->type != GRDRM_TYPE_CRTC)
1945 crtc = crtc_from_object(object);
1947 /* Save data if it is the first time we refresh the CRTC. This data can
1948 * be used optionally to restore any previous configuration. For
1949 * instance, it allows us to restore VT configurations after we close
1950 * our session again. */
1951 if (!crtc->old.set) {
1952 crtc->old.fb = crtc->kern.used_fb;
1953 crtc->old.fb_x = crtc->kern.fb_offset_x;
1954 crtc->old.fb_y = crtc->kern.fb_offset_y;
1955 crtc->old.gamma = crtc->kern.gamma_size;
1956 crtc->old.n_connectors = crtc->kern.n_used_connectors;
1957 if (crtc->old.n_connectors)
1958 memcpy(crtc->old.connectors, crtc->kern.used_connectors, sizeof(uint32_t) * crtc->old.n_connectors);
1959 crtc->old.mode_set = crtc->kern.mode_set;
1960 crtc->old.mode = crtc->kern.mode;
1961 crtc->old.set = true;
1965 /* everything synced */
1969 if (tries >= GRDRM_MAX_TRIES) {
1971 * Ugh! We were unable to sync the DRM card state due to heavy
1972 * hotplugging. This should never happen, so print a debug
1973 * message and bail out. The next uevent will trigger
1977 log_debug("grdrm: %s: hotplug-storm when syncing card", card->base.name);
1984 static bool card_configure_crtc(grdrm_crtc *crtc, grdrm_connector *connector) {
1985 grdrm_card *card = crtc->object.card;
1986 grdrm_encoder *encoder;
1987 grdrm_object *object;
1990 if (crtc->object.assigned || connector->object.assigned)
1992 if (connector->kern.connection != 1)
1995 for (i = 0; i < connector->kern.n_encoders; ++i) {
1996 object = grdrm_find_object(card, connector->kern.encoders[i]);
1997 if (!object || object->type != GRDRM_TYPE_ENCODER)
2000 encoder = encoder_from_object(object);
2001 for (j = 0; j < encoder->kern.n_crtcs; ++j) {
2002 if (encoder->kern.crtcs[j] == crtc->object.id) {
2003 grdrm_crtc_assign(crtc, connector);
2012 static void grdrm_card_configure(grdrm_card *card) {
2014 * Modeset Configuration
2015 * This is where we update our modeset configuration and assign
2016 * connectors to CRTCs. This means, each connector that we want to
2017 * enable needs a CRTC, disabled (or unavailable) connectors are left
2018 * alone in the dark. Once all CRTCs are assigned, the remaining CRTCs
2020 * Sounds trivial, but there're several caveats:
2022 * * Multiple connectors can be driven by the same CRTC. This is
2023 * known as 'hardware clone mode'. Advantage over software clone
2024 * mode is that only a single CRTC is needed to drive multiple
2025 * displays. However, few hardware supports this and it's a huge
2026 * headache to configure on dynamic demands. Therefore, we only
2027 * support it if configured statically beforehand.
2029 * * CRTCs are not created equal. Some might be much more poweful
2030 * than others, including more advanced plane support. So far, our
2031 * CRTC selection is random. You need to supply static
2032 * configuration if you want special setups. So far, there is no
2033 * proper way to do advanced CRTC selection on dynamic demands. It
2034 * is not really clear which demands require what CRTC, so, like
2035 * everyone else, we do random CRTC selection unless explicitly
2038 * * Each Connector has a list of possible encoders that can drive
2039 * it, and each encoder has a list of possible CRTCs. If this graph
2040 * is a tree, assignment is trivial. However, if not, we cannot
2041 * reliably decide on configurations beforehand. The encoder is
2042 * always selected by the kernel, so we have to actually set a mode
2043 * to know which encoder is used. There is no way to ask the kernel
2044 * whether a given configuration is possible. This will change with
2045 * atomic-modesetting, but until then, we keep our configurations
2046 * simple and assume they work all just fine. If one fails
2047 * unexpectedly, we print a warning and disable it.
2049 * Configuring a card consists of several steps:
2051 * 1) First of all, we apply any user-configuration. If a user wants
2052 * a fixed configuration, we apply it and preserve it.
2053 * So far, we don't support user configuration files, so this step
2056 * 2) Secondly, we need to apply any quirks from hwdb. Some hardware
2057 * might only support limited configurations or require special
2058 * CRTC/Connector mappings. We read this from hwdb and apply it, if
2060 * So far, we don't support this as there is no known quirk, so
2061 * this step is skipped.
2063 * 3) As deep modesets are expensive, we try to avoid them if
2064 * possible. Therefore, we read the current configuration from the
2065 * kernel and try to preserve it, if compatible with our demands.
2066 * If not, we break it and reassign it in a following step.
2068 * 4) The main step involves configuring all remaining objects. By
2069 * default, all available connectors are enabled, except for those
2070 * disabled by user-configuration. We lookup a suitable CRTC for
2071 * each connector and assign them. As there might be more
2072 * connectors than CRTCs, we apply some ordering so users can
2073 * select which connectors are more important right now.
2074 * So far, we only apply the default ordering, more might be added
2078 grdrm_object *object;
2082 /* clear assignments */
2083 HASHMAP_FOREACH(object, card->object_map, i)
2084 object->assigned = false;
2086 /* preserve existing configurations */
2087 HASHMAP_FOREACH(object, card->object_map, i) {
2088 if (object->type != GRDRM_TYPE_CRTC || object->assigned)
2091 crtc = crtc_from_object(object);
2093 if (crtc->applied) {
2094 /* If our mode is set, preserve it. If no connector is
2095 * set, modeset either failed or the pipe is unused. In
2096 * both cases, leave it alone. It might be tried again
2097 * below in case there're remaining connectors.
2098 * Otherwise, try restoring the assignments. If they
2099 * are no longer valid, leave the pipe untouched. */
2101 if (crtc->set.n_connectors < 1)
2104 assert(crtc->set.n_connectors == 1);
2106 object = grdrm_find_object(card, crtc->set.connectors[0]);
2107 if (!object || object->type != GRDRM_TYPE_CONNECTOR)
2110 card_configure_crtc(crtc, connector_from_object(object));
2111 } else if (crtc->kern.mode_set && crtc->kern.n_used_connectors != 1) {
2112 /* If our mode is not set on the pipe, we know the kern
2113 * information is valid. Try keeping it. If it's not
2114 * possible, leave the pipe untouched for later
2117 object = grdrm_find_object(card, crtc->kern.used_connectors[0]);
2118 if (!object || object->type != GRDRM_TYPE_CONNECTOR)
2121 card_configure_crtc(crtc, connector_from_object(object));
2125 /* assign remaining objects */
2126 HASHMAP_FOREACH(object, card->object_map, i) {
2127 if (object->type != GRDRM_TYPE_CRTC || object->assigned)
2130 crtc = crtc_from_object(object);
2132 HASHMAP_FOREACH(object, card->object_map, j) {
2133 if (object->type != GRDRM_TYPE_CONNECTOR)
2136 if (card_configure_crtc(crtc, connector_from_object(object)))
2140 if (!crtc->object.assigned)
2141 grdrm_crtc_assign(crtc, NULL);
2144 /* expose configuration */
2145 HASHMAP_FOREACH(object, card->object_map, i) {
2146 if (object->type != GRDRM_TYPE_CRTC)
2149 grdrm_crtc_expose(crtc_from_object(object));
2153 static void grdrm_card_hotplug(grdrm_card *card) {
2161 log_debug("grdrm: %s/%s: reconfigure card", card->base.session->name, card->base.name);
2163 card->ready = false;
2164 r = grdrm_card_resync(card);
2166 log_debug("grdrm: %s/%s: cannot re-sync card: %s",
2167 card->base.session->name, card->base.name, strerror(-r));
2171 grdev_session_pin(card->base.session);
2173 /* debug statement to print card information */
2175 grdrm_card_print(card);
2177 grdrm_card_configure(card);
2179 card->hotplug = false;
2181 grdev_session_unpin(card->base.session);
2184 static int grdrm_card_io_fn(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
2185 grdrm_card *card = userdata;
2186 struct drm_event_vblank *vblank;
2187 struct drm_event *event;
2188 uint32_t id, counter;
2189 grdrm_object *object;
2193 if (revents & (EPOLLHUP | EPOLLERR)) {
2194 /* Immediately close device on HUP; no need to flush pending
2195 * data.. there're no events we care about here. */
2196 log_debug("grdrm: %s/%s: HUP", card->base.session->name, card->base.name);
2197 grdrm_card_close(card);
2201 if (revents & (EPOLLIN)) {
2202 l = read(card->fd, buf, sizeof(buf));
2204 if (errno == EAGAIN || errno == EINTR)
2207 log_debug("grdrm: %s/%s: read error: %m", card->base.session->name, card->base.name);
2208 grdrm_card_close(card);
2210 } else if ((size_t)l < sizeof(*event)) {
2211 log_debug("grdrm: %s/%s: short read of %zd bytes", card->base.session->name, card->base.name, l);
2215 for (i = 0; i < l; i += event->length) {
2216 event = (void*)&buf[i];
2218 if (i + event->length > l) {
2219 log_debug("grdrm: %s/%s: truncated event", card->base.session->name, card->base.name);
2223 switch (event->type) {
2224 case DRM_EVENT_FLIP_COMPLETE:
2225 vblank = (void*)event;
2226 if (event->length < sizeof(*vblank)) {
2227 log_debug("grdrm: %s/%s: truncated vblank event", card->base.session->name, card->base.name);
2231 grdrm_decode_vblank_data(vblank->user_data, &id, &counter);
2232 object = grdrm_find_object(card, id);
2233 if (!object || object->type != GRDRM_TYPE_CRTC)
2236 grdrm_crtc_flip_complete(crtc_from_object(object), counter, vblank);
2245 static int grdrm_card_add(grdrm_card *card, const char *name) {
2247 assert(card->fd < 0);
2249 card->object_map = hashmap_new(&trivial_hash_ops);
2250 if (!card->object_map)
2253 return grdev_card_add(&card->base, name);
2256 static void grdrm_card_destroy(grdrm_card *card) {
2258 assert(!card->running);
2259 assert(card->fd < 0);
2260 assert(hashmap_size(card->object_map) == 0);
2262 hashmap_free(card->object_map);
2265 static void grdrm_card_commit(grdev_card *basecard) {
2266 grdrm_card *card = grdrm_card_from_base(basecard);
2267 grdrm_object *object;
2270 HASHMAP_FOREACH(object, card->object_map, iter) {
2274 if (object->type != GRDRM_TYPE_CRTC)
2277 grdrm_crtc_commit(crtc_from_object(object));
2281 static void grdrm_card_restore(grdev_card *basecard) {
2282 grdrm_card *card = grdrm_card_from_base(basecard);
2283 grdrm_object *object;
2286 HASHMAP_FOREACH(object, card->object_map, iter) {
2290 if (object->type != GRDRM_TYPE_CRTC)
2293 grdrm_crtc_restore(crtc_from_object(object));
2297 static void grdrm_card_enable(grdrm_card *card) {
2300 if (card->fd < 0 || card->running)
2303 /* ignore cards without DUMB_BUFFER capability */
2304 if (!card->cap_dumb)
2307 assert(card->fd_src);
2309 log_debug("grdrm: %s/%s: enable", card->base.session->name, card->base.name);
2311 card->running = true;
2312 sd_event_source_set_enabled(card->fd_src, SD_EVENT_ON);
2313 grdrm_card_hotplug(card);
2316 static void grdrm_card_disable(grdrm_card *card) {
2317 grdrm_object *object;
2322 if (card->fd < 0 || !card->running)
2325 assert(card->fd_src);
2327 log_debug("grdrm: %s/%s: disable", card->base.session->name, card->base.name);
2329 card->running = false;
2330 card->ready = false;
2331 sd_event_source_set_enabled(card->fd_src, SD_EVENT_OFF);
2333 /* stop all pipes */
2334 HASHMAP_FOREACH(object, card->object_map, iter) {
2337 if (object->type != GRDRM_TYPE_CRTC)
2340 crtc = crtc_from_object(object);
2341 crtc->applied = false;
2343 grdev_pipe_ready(&crtc->pipe->base, false);
2347 static int grdrm_card_open(grdrm_card *card, int dev_fd) {
2348 _cleanup_(grdev_session_unpinp) grdev_session *pin = NULL;
2349 _cleanup_close_ int fd = dev_fd;
2350 struct drm_get_cap cap;
2354 assert(dev_fd >= 0);
2355 assert(card->fd != dev_fd);
2357 pin = grdev_session_pin(card->base.session);
2358 grdrm_card_close(card);
2360 log_debug("grdrm: %s/%s: open", card->base.session->name, card->base.name);
2362 r = fd_nonblock(fd, true);
2366 r = fd_cloexec(fd, true);
2370 flags = fcntl(fd, F_GETFL, 0);
2373 if ((flags & O_ACCMODE) != O_RDWR)
2376 r = sd_event_add_io(card->base.session->context->event,
2379 EPOLLHUP | EPOLLERR | EPOLLIN,
2385 sd_event_source_set_enabled(card->fd_src, SD_EVENT_OFF);
2387 card->hotplug = true;
2391 /* cache DUMB_BUFFER capability */
2392 cap.capability = DRM_CAP_DUMB_BUFFER;
2394 r = ioctl(card->fd, DRM_IOCTL_GET_CAP, &cap);
2395 card->cap_dumb = r >= 0 && cap.value;
2397 log_debug("grdrm: %s/%s: cannot retrieve DUMB_BUFFER capability: %s",
2398 card->base.session->name, card->base.name, strerror(-r));
2399 else if (!card->cap_dumb)
2400 log_debug("grdrm: %s/%s: DUMB_BUFFER capability not supported",
2401 card->base.session->name, card->base.name);
2403 /* cache TIMESTAMP_MONOTONIC capability */
2404 cap.capability = DRM_CAP_TIMESTAMP_MONOTONIC;
2406 r = ioctl(card->fd, DRM_IOCTL_GET_CAP, &cap);
2407 card->cap_monotonic = r >= 0 && cap.value;
2409 log_debug("grdrm: %s/%s: cannot retrieve TIMESTAMP_MONOTONIC capability: %s",
2410 card->base.session->name, card->base.name, strerror(-r));
2411 else if (!card->cap_monotonic)
2412 log_debug("grdrm: %s/%s: TIMESTAMP_MONOTONIC is disabled globally, fix this NOW!",
2413 card->base.session->name, card->base.name);
2418 static void grdrm_card_close(grdrm_card *card) {
2419 grdrm_object *object;
2424 log_debug("grdrm: %s/%s: close", card->base.session->name, card->base.name);
2426 grdrm_card_disable(card);
2428 card->fd_src = sd_event_source_unref(card->fd_src);
2429 card->fd = safe_close(card->fd);
2431 grdev_session_pin(card->base.session);
2432 while ((object = hashmap_first(card->object_map)))
2433 grdrm_object_free(object);
2434 grdev_session_unpin(card->base.session);
2437 static bool grdrm_card_async(grdrm_card *card, int r) {
2440 /* If we get EACCES on runtime DRM calls, we lost DRM-Master
2441 * (or we did something terribly wrong). Immediately disable
2442 * the card, so we stop all pipes and wait to be activated
2444 grdrm_card_disable(card);
2447 /* DRM objects can be hotplugged at any time. If an object is
2448 * removed that we use, we remember that state so a following
2449 * call can test for this.
2450 * Note that we also get a uevent as followup, this will resync
2451 * the whole device. */
2452 card->async_hotplug = true;
2456 return !card->ready;
2461 * The unmanaged DRM card opens the device node for a given DRM device
2462 * directly (/dev/dri/cardX) and thus needs sufficient privileges. It opens
2463 * the device only if we really require it and releases it as soon as we're
2464 * disabled or closed.
2465 * The unmanaged element can be used in all situations where you have direct
2466 * access to DRM device nodes. Unlike managed DRM elements, it can be used
2467 * outside of user sessions and in emergency situations where logind is not
2471 static void unmanaged_card_enable(grdev_card *basecard) {
2472 unmanaged_card *cu = unmanaged_card_from_base(basecard);
2475 if (cu->card.fd < 0) {
2476 /* try open on activation if it failed during allocation */
2477 fd = open(cu->devnode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
2479 /* not fatal; simply ignore the device */
2480 log_debug("grdrm: %s/%s: cannot open node %s: %m",
2481 basecard->session->name, basecard->name, cu->devnode);
2485 /* we might already be DRM-Master by open(); that's fine */
2487 r = grdrm_card_open(&cu->card, fd);
2489 log_debug("grdrm: %s/%s: cannot open: %s",
2490 basecard->session->name, basecard->name, strerror(-r));
2495 r = ioctl(cu->card.fd, DRM_IOCTL_SET_MASTER, 0);
2497 log_debug("grdrm: %s/%s: cannot acquire DRM-Master: %m",
2498 basecard->session->name, basecard->name);
2502 grdrm_card_enable(&cu->card);
2505 static void unmanaged_card_disable(grdev_card *basecard) {
2506 unmanaged_card *cu = unmanaged_card_from_base(basecard);
2508 grdrm_card_disable(&cu->card);
2511 static int unmanaged_card_new(grdev_card **out, grdev_session *session, struct udev_device *ud) {
2512 _cleanup_(grdev_card_freep) grdev_card *basecard = NULL;
2513 char name[GRDRM_CARD_NAME_MAX];
2515 const char *devnode;
2519 assert_return(session, -EINVAL);
2520 assert_return(ud, -EINVAL);
2522 devnode = udev_device_get_devnode(ud);
2523 devnum = udev_device_get_devnum(ud);
2524 if (!devnode || devnum == 0)
2527 grdrm_name(name, devnum);
2529 cu = new0(unmanaged_card, 1);
2533 basecard = &cu->card.base;
2534 cu->card = GRDRM_CARD_INIT(&unmanaged_card_vtable, session);
2536 cu->devnode = strdup(devnode);
2540 r = grdrm_card_add(&cu->card, name);
2544 /* try to open but ignore errors */
2545 fd = open(cu->devnode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
2547 /* not fatal; allow uaccess based control on activation */
2548 log_debug("grdrm: %s/%s: cannot open node %s: %m",
2549 basecard->session->name, basecard->name, cu->devnode);
2551 /* We might get DRM-Master implicitly on open(); drop it immediately
2552 * so we acquire it only once we're actually enabled. */
2553 ioctl(fd, DRM_IOCTL_DROP_MASTER, 0);
2555 r = grdrm_card_open(&cu->card, fd);
2557 log_debug("grdrm: %s/%s: cannot open: %s",
2558 basecard->session->name, basecard->name, strerror(-r));
2567 static void unmanaged_card_free(grdev_card *basecard) {
2568 unmanaged_card *cu = unmanaged_card_from_base(basecard);
2570 assert(!basecard->enabled);
2572 grdrm_card_close(&cu->card);
2573 grdrm_card_destroy(&cu->card);
2578 static const grdev_card_vtable unmanaged_card_vtable = {
2579 .free = unmanaged_card_free,
2580 .enable = unmanaged_card_enable,
2581 .disable = unmanaged_card_disable,
2582 .commit = grdrm_card_commit,
2583 .restore = grdrm_card_restore,
2588 * The managed DRM card uses systemd-logind to acquire DRM devices. This
2589 * means, we do not open the device node /dev/dri/cardX directly. Instead,
2590 * logind passes us a file-descriptor whenever our session is activated. Thus,
2591 * we don't need access to the device node directly.
2592 * Furthermore, whenever the session is put asleep, logind revokes the
2593 * file-descriptor so we loose access to the device.
2594 * Managed DRM cards should be preferred over unmanaged DRM cards whenever
2595 * you run inside a user session with exclusive device access.
2598 static void managed_card_enable(grdev_card *card) {
2599 managed_card *cm = managed_card_from_base(card);
2601 /* If the device is manually re-enabled, we try to resume our card
2602 * management. Note that we have no control over DRM-Master and the fd,
2603 * so we have to take over the state from the last logind event. */
2606 grdrm_card_enable(&cm->card);
2609 static void managed_card_disable(grdev_card *card) {
2610 managed_card *cm = managed_card_from_base(card);
2612 /* If the device is manually disabled, we keep the FD but put our card
2613 * management asleep. This way, we can wake up at any time, but don't
2614 * touch the device while asleep. */
2616 grdrm_card_disable(&cm->card);
2619 static int managed_card_pause_device_fn(sd_bus *bus,
2620 sd_bus_message *signal,
2622 sd_bus_error *ret_error) {
2623 managed_card *cm = userdata;
2624 grdev_session *session = cm->card.base.session;
2625 uint32_t major, minor;
2630 * We get PauseDevice() signals from logind whenever a device we
2631 * requested was, or is about to be, paused. Arguments are major/minor
2632 * number of the device and the mode of the operation.
2633 * In case the event is not about our device, we ignore it. Otherwise,
2634 * we treat it as asynchronous DRM-DROP-MASTER. Note that we might have
2635 * already handled an EACCES error from a modeset ioctl, in which case
2636 * we already disabled the device.
2638 * @mode can be one of the following:
2639 * "pause": The device is about to be paused. We must react
2640 * immediately and respond with PauseDeviceComplete(). Once
2641 * we replied, logind will pause the device. Note that
2642 * logind might apply any kind of timeout and force pause
2643 * the device if we don't respond in a timely manner. In
2644 * this case, we will receive a second PauseDevice event
2645 * with @mode set to "force" (or similar).
2646 * "force": The device was disabled forecfully by logind. DRM-Master
2647 * was already dropped. This is just an asynchronous
2648 * notification so we can put the device asleep (in case
2649 * we didn't already notice the dropped DRM-Master).
2650 * "gone": This is like "force" but is sent if the device was
2651 * paused due to a device-removal event.
2653 * We always handle PauseDevice signals as "force" as we properly
2654 * support asynchronously dropping DRM-Master, anyway. But in case
2655 * logind sent mode "pause", we also call PauseDeviceComplete() to
2656 * immediately acknowledge the request.
2659 r = sd_bus_message_read(signal, "uus", &major, &minor, &mode);
2661 log_debug("grdrm: %s/%s: erroneous PauseDevice signal",
2662 session->name, cm->card.base.name);
2666 /* not our device? */
2667 if (makedev(major, minor) != cm->devnum)
2671 grdrm_card_disable(&cm->card);
2673 if (streq(mode, "pause")) {
2674 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
2677 * Sending PauseDeviceComplete() is racy if logind triggers the
2678 * timeout. That is, if we take too long and logind pauses the
2679 * device by sending a forced PauseDevice, our
2680 * PauseDeviceComplete call will be stray. That's fine, though.
2681 * logind ignores such stray calls. Only if logind also sent a
2682 * further PauseDevice() signal, it might match our call
2683 * incorrectly to the newer PauseDevice(). That's fine, too, as
2684 * we handle that event asynchronously, anyway. Therefore,
2685 * whatever happens, we're fine. Yay!
2688 r = sd_bus_message_new_method_call(session->context->sysbus,
2690 "org.freedesktop.login1",
2692 "org.freedesktop.login1.Session",
2693 "PauseDeviceComplete");
2695 r = sd_bus_message_append(m, "uu", major, minor);
2697 r = sd_bus_send(session->context->sysbus, m, NULL);
2701 log_debug("grdrm: %s/%s: cannot send PauseDeviceComplete: %s",
2702 session->name, cm->card.base.name, strerror(-r));
2708 static int managed_card_resume_device_fn(sd_bus *bus,
2709 sd_bus_message *signal,
2711 sd_bus_error *ret_error) {
2712 managed_card *cm = userdata;
2713 grdev_session *session = cm->card.base.session;
2714 uint32_t major, minor;
2718 * We get ResumeDevice signals whenever logind resumed a previously
2719 * paused device. The arguments contain the major/minor number of the
2720 * related device and a new file-descriptor for the freshly opened
2722 * If the signal is not about our device, we simply ignore it.
2723 * Otherwise, we immediately resume the device. Note that we drop the
2724 * new file-descriptor as we already have one from TakeDevice(). logind
2725 * preserves the file-context across pause/resume for DRM but only
2726 * drops/acquires DRM-Master accordingly. This way, our context (like
2727 * DRM-FBs and BOs) is preserved.
2730 r = sd_bus_message_read(signal, "uuh", &major, &minor, &fd);
2732 log_debug("grdrm: %s/%s: erroneous ResumeDevice signal",
2733 session->name, cm->card.base.name);
2737 /* not our device? */
2738 if (makedev(major, minor) != cm->devnum)
2741 if (cm->card.fd < 0) {
2742 /* This shouldn't happen. We should already own an FD from
2743 * TakeDevice(). However, lets be safe and use this FD in case
2744 * we really don't have one. There is no harm in doing this
2745 * and our code works fine this way. */
2746 fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
2748 log_debug("grdrm: %s/%s: cannot duplicate fd: %m",
2749 session->name, cm->card.base.name);
2753 r = grdrm_card_open(&cm->card, fd);
2755 log_debug("grdrm: %s/%s: cannot open: %s",
2756 session->name, cm->card.base.name, strerror(-r));
2762 if (cm->card.base.enabled)
2763 grdrm_card_enable(&cm->card);
2768 static int managed_card_setup_bus(managed_card *cm) {
2769 grdev_session *session = cm->card.base.session;
2770 _cleanup_free_ char *match = NULL;
2773 match = strjoin("type='signal',"
2774 "sender='org.freedesktop.login1',"
2775 "interface='org.freedesktop.login1.Session',"
2776 "member='PauseDevice',"
2777 "path='", session->path, "'",
2782 r = sd_bus_add_match(session->context->sysbus,
2783 &cm->slot_pause_device,
2785 managed_card_pause_device_fn,
2791 match = strjoin("type='signal',"
2792 "sender='org.freedesktop.login1',"
2793 "interface='org.freedesktop.login1.Session',"
2794 "member='ResumeDevice',"
2795 "path='", session->path, "'",
2800 r = sd_bus_add_match(session->context->sysbus,
2801 &cm->slot_resume_device,
2803 managed_card_resume_device_fn,
2811 static int managed_card_take_device_fn(sd_bus *bus,
2812 sd_bus_message *reply,
2814 sd_bus_error *ret_error) {
2815 managed_card *cm = userdata;
2816 grdev_session *session = cm->card.base.session;
2819 cm->slot_take_device = sd_bus_slot_unref(cm->slot_take_device);
2821 if (sd_bus_message_is_method_error(reply, NULL)) {
2822 const sd_bus_error *error = sd_bus_message_get_error(reply);
2824 log_debug("grdrm: %s/%s: TakeDevice failed: %s: %s",
2825 session->name, cm->card.base.name, error->name, error->message);
2829 cm->acquired = true;
2831 r = sd_bus_message_read(reply, "hb", &fd, &paused);
2833 log_debug("grdrm: %s/%s: erroneous TakeDevice reply",
2834 session->name, cm->card.base.name);
2838 fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
2840 log_debug("grdrm: %s/%s: cannot duplicate fd: %m",
2841 session->name, cm->card.base.name);
2845 r = grdrm_card_open(&cm->card, fd);
2847 log_debug("grdrm: %s/%s: cannot open: %s",
2848 session->name, cm->card.base.name, strerror(-r));
2852 if (!paused && cm->card.base.enabled)
2853 grdrm_card_enable(&cm->card);
2858 static void managed_card_take_device(managed_card *cm) {
2859 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
2860 grdev_session *session = cm->card.base.session;
2863 r = sd_bus_message_new_method_call(session->context->sysbus,
2865 "org.freedesktop.login1",
2867 "org.freedesktop.login1.Session",
2872 r = sd_bus_message_append(m, "uu", major(cm->devnum), minor(cm->devnum));
2876 r = sd_bus_call_async(session->context->sysbus,
2877 &cm->slot_take_device,
2879 managed_card_take_device_fn,
2885 cm->requested = true;
2889 log_debug("grdrm: %s/%s: cannot send TakeDevice request: %s",
2890 session->name, cm->card.base.name, strerror(-r));
2893 static void managed_card_release_device(managed_card *cm) {
2894 _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
2895 grdev_session *session = cm->card.base.session;
2899 * If TakeDevice() is pending or was successful, make sure to
2900 * release the device again. We don't care for return-values,
2901 * so send it without waiting or callbacks.
2902 * If a failed TakeDevice() is pending, but someone else took
2903 * the device on the same bus-connection, we might incorrectly
2904 * release their device. This is an unlikely race, though.
2905 * Furthermore, you really shouldn't have two users of the
2906 * controller-API on the same session, on the same devices, *AND* on
2907 * the same bus-connection. So we don't care for that race..
2910 grdrm_card_close(&cm->card);
2911 cm->requested = false;
2913 if (!cm->acquired && !cm->slot_take_device)
2916 cm->slot_take_device = sd_bus_slot_unref(cm->slot_take_device);
2917 cm->acquired = false;
2919 r = sd_bus_message_new_method_call(session->context->sysbus,
2921 "org.freedesktop.login1",
2923 "org.freedesktop.login1.Session",
2926 r = sd_bus_message_append(m, "uu", major(cm->devnum), minor(cm->devnum));
2928 r = sd_bus_send(session->context->sysbus, m, NULL);
2931 if (r < 0 && r != -ENOTCONN)
2932 log_debug("grdrm: %s/%s: cannot send ReleaseDevice: %s",
2933 session->name, cm->card.base.name, strerror(-r));
2936 static int managed_card_new(grdev_card **out, grdev_session *session, struct udev_device *ud) {
2937 _cleanup_(grdev_card_freep) grdev_card *basecard = NULL;
2938 char name[GRDRM_CARD_NAME_MAX];
2943 assert_return(session, -EINVAL);
2944 assert_return(session->managed, -EINVAL);
2945 assert_return(session->context->sysbus, -EINVAL);
2946 assert_return(ud, -EINVAL);
2948 devnum = udev_device_get_devnum(ud);
2952 grdrm_name(name, devnum);
2954 cm = new0(managed_card, 1);
2958 basecard = &cm->card.base;
2959 cm->card = GRDRM_CARD_INIT(&managed_card_vtable, session);
2960 cm->devnum = devnum;
2962 r = managed_card_setup_bus(cm);
2966 r = grdrm_card_add(&cm->card, name);
2970 managed_card_take_device(cm);
2978 static void managed_card_free(grdev_card *basecard) {
2979 managed_card *cm = managed_card_from_base(basecard);
2981 assert(!basecard->enabled);
2983 managed_card_release_device(cm);
2984 cm->slot_resume_device = sd_bus_slot_unref(cm->slot_resume_device);
2985 cm->slot_pause_device = sd_bus_slot_unref(cm->slot_pause_device);
2986 grdrm_card_destroy(&cm->card);
2990 static const grdev_card_vtable managed_card_vtable = {
2991 .free = managed_card_free,
2992 .enable = managed_card_enable,
2993 .disable = managed_card_disable,
2994 .commit = grdrm_card_commit,
2995 .restore = grdrm_card_restore,
2999 * Generic Constructor
3000 * Instead of relying on the caller to choose between managed and unmanaged
3001 * DRM devices, the grdev_drm_new() constructor does that for you (by
3002 * looking at session->managed).
3005 bool grdev_is_drm_card(grdev_card *basecard) {
3006 return basecard && (basecard->vtable == &unmanaged_card_vtable ||
3007 basecard->vtable == &managed_card_vtable);
3010 grdev_card *grdev_find_drm_card(grdev_session *session, dev_t devnum) {
3011 char name[GRDRM_CARD_NAME_MAX];
3013 assert_return(session, NULL);
3014 assert_return(devnum != 0, NULL);
3016 grdrm_name(name, devnum);
3017 return grdev_find_card(session, name);
3020 int grdev_drm_card_new(grdev_card **out, grdev_session *session, struct udev_device *ud) {
3021 assert_return(session, -EINVAL);
3022 assert_return(ud, -EINVAL);
3024 return session->managed ? managed_card_new(out, session, ud) : unmanaged_card_new(out, session, ud);
3027 void grdev_drm_card_hotplug(grdev_card *basecard, struct udev_device *ud) {
3028 const char *p, *action;
3033 assert(grdev_is_drm_card(basecard));
3036 card = grdrm_card_from_base(basecard);
3038 action = udev_device_get_action(ud);
3039 if (!action || streq(action, "add") || streq(action, "remove")) {
3040 /* If we get add/remove events on DRM nodes without devnum, we
3041 * got hotplugged DRM objects so refresh the device. */
3042 devnum = udev_device_get_devnum(ud);
3044 card->hotplug = true;
3045 grdrm_card_hotplug(card);
3047 } else if (streq_ptr(action, "change")) {
3048 /* A change event with HOTPLUG=1 is sent whenever a connector
3049 * changed state. Refresh the device to update our state. */
3050 p = udev_device_get_property_value(ud, "HOTPLUG");
3051 if (streq_ptr(p, "1")) {
3052 card->hotplug = true;
3053 grdrm_card_hotplug(card);