| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Daniel Vetter | 5699 | 49.15% | 63 | 32.31% |
| Maarten Lankhorst | 2366 | 20.40% | 37 | 18.97% |
| Ville Syrjälä | 691 | 5.96% | 19 | 9.74% |
| Ander Conselvan de Oliveira | 385 | 3.32% | 2 | 1.03% |
| Thierry Reding | 316 | 2.73% | 8 | 4.10% |
| Boris Brezillon | 313 | 2.70% | 9 | 4.62% |
| Gustavo Padovan | 303 | 2.61% | 3 | 1.54% |
| Jose Abreu | 287 | 2.47% | 1 | 0.51% |
| Rob Clark | 228 | 1.97% | 7 | 3.59% |
| Andrey Grodzovsky | 145 | 1.25% | 2 | 1.03% |
| Jyri Sarha | 114 | 0.98% | 1 | 0.51% |
| Brian Starkey | 96 | 0.83% | 2 | 1.03% |
| Liu Ying | 80 | 0.69% | 4 | 2.05% |
| Laurent Pinchart | 75 | 0.65% | 7 | 3.59% |
| Maxime Ripard | 68 | 0.59% | 1 | 0.51% |
| Leo (Sunpeng) Li | 59 | 0.51% | 2 | 1.03% |
| Sean Paul | 48 | 0.41% | 4 | 2.05% |
| Stephen Chandler Paul | 44 | 0.38% | 1 | 0.51% |
| Manasi D Navare | 34 | 0.29% | 1 | 0.51% |
| Noralf Trönnes | 32 | 0.28% | 2 | 1.03% |
| Peter Ujfalusi | 27 | 0.23% | 1 | 0.51% |
| Daniel Stone | 27 | 0.23% | 1 | 0.51% |
| Dhinakaran Pandiyan | 24 | 0.21% | 1 | 0.51% |
| Philipp Zabel | 23 | 0.20% | 1 | 0.51% |
| Radhakrishna Sripada | 16 | 0.14% | 1 | 0.51% |
| Russell King | 16 | 0.14% | 1 | 0.51% |
| Chris Wilson | 16 | 0.14% | 2 | 1.03% |
| Nicholas Kazlauskas | 15 | 0.13% | 1 | 0.51% |
| Deepak Rawat | 10 | 0.09% | 1 | 0.51% |
| Andrzej Hajda | 8 | 0.07% | 1 | 0.51% |
| Inki Dae | 7 | 0.06% | 1 | 0.51% |
| Archit Taneja | 6 | 0.05% | 1 | 0.51% |
| Tvrtko A. Ursulin | 5 | 0.04% | 1 | 0.51% |
| Linus Torvalds | 5 | 0.04% | 1 | 0.51% |
| Marek Szyprowski | 3 | 0.03% | 1 | 0.51% |
| John Hunter | 3 | 0.03% | 1 | 0.51% |
| Dan Carpenter | 1 | 0.01% | 1 | 0.51% |
| Wei Yongjun | 1 | 0.01% | 1 | 0.51% |
| Total | 11596 | 195 |
/* * Copyright (C) 2014 Red Hat * Copyright (C) 2014 Intel Corp. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: * Rob Clark <robdclark@gmail.com> * Daniel Vetter <daniel.vetter@ffwll.ch> */ #include <drm/drmP.h> #include <drm/drm_atomic.h> #include <drm/drm_atomic_uapi.h> #include <drm/drm_plane_helper.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_writeback.h> #include <drm/drm_damage_helper.h> #include <linux/dma-fence.h> #include "drm_crtc_helper_internal.h" #include "drm_crtc_internal.h" /** * DOC: overview * * This helper library provides implementations of check and commit functions on * top of the CRTC modeset helper callbacks and the plane helper callbacks. It * also provides convenience implementations for the atomic state handling * callbacks for drivers which don't need to subclass the drm core structures to * add their own additional internal state. * * This library also provides default implementations for the check callback in * drm_atomic_helper_check() and for the commit callback with * drm_atomic_helper_commit(). But the individual stages and callbacks are * exposed to allow drivers to mix and match and e.g. use the plane helpers only * together with a driver private modeset implementation. * * This library also provides implementations for all the legacy driver * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the * various functions to implement set_property callbacks. New drivers must not * implement these functions themselves but must use the provided helpers. * * The atomic helper uses the same function table structures as all other * modesetting helpers. See the documentation for &struct drm_crtc_helper_funcs, * struct &drm_encoder_helper_funcs and &struct drm_connector_helper_funcs. It * also shares the &struct drm_plane_helper_funcs function table with the plane * helpers. */ static void drm_atomic_helper_plane_changed(struct drm_atomic_state *state, struct drm_plane_state *old_plane_state, struct drm_plane_state *plane_state, struct drm_plane *plane) { struct drm_crtc_state *crtc_state; if (old_plane_state->crtc) { crtc_state = drm_atomic_get_new_crtc_state(state, old_plane_state->crtc); if (WARN_ON(!crtc_state)) return; crtc_state->planes_changed = true; } if (plane_state->crtc) { crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc); if (WARN_ON(!crtc_state)) return; crtc_state->planes_changed = true; } } /* * For connectors that support multiple encoders, either the * .atomic_best_encoder() or .best_encoder() operation must be implemented. */ static struct drm_encoder * pick_single_encoder_for_connector(struct drm_connector *connector) { WARN_ON(connector->encoder_ids[1]); return drm_encoder_find(connector->dev, NULL, connector->encoder_ids[0]); } static int handle_conflicting_encoders(struct drm_atomic_state *state, bool disable_conflicting_encoders) { struct drm_connector_state *new_conn_state; struct drm_connector *connector; struct drm_connector_list_iter conn_iter; struct drm_encoder *encoder; unsigned encoder_mask = 0; int i, ret = 0; /* * First loop, find all newly assigned encoders from the connectors * part of the state. If the same encoder is assigned to multiple * connectors bail out. */ for_each_new_connector_in_state(state, connector, new_conn_state, i) { const struct drm_connector_helper_funcs *funcs = connector->helper_private; struct drm_encoder *new_encoder; if (!new_conn_state->crtc) continue; if (funcs->atomic_best_encoder) new_encoder = funcs->atomic_best_encoder(connector, new_conn_state); else if (funcs->best_encoder) new_encoder = funcs->best_encoder(connector); else new_encoder = pick_single_encoder_for_connector(connector); if (new_encoder) { if (encoder_mask & drm_encoder_mask(new_encoder)) { DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", new_encoder->base.id, new_encoder->name, connector->base.id, connector->name); return -EINVAL; } encoder_mask |= drm_encoder_mask(new_encoder); } } if (!encoder_mask) return 0; /* * Second loop, iterate over all connectors not part of the state. * * If a conflicting encoder is found and disable_conflicting_encoders * is not set, an error is returned. Userspace can provide a solution * through the atomic ioctl. * * If the flag is set conflicting connectors are removed from the crtc * and the crtc is disabled if no encoder is left. This preserves * compatibility with the legacy set_config behavior. */ drm_connector_list_iter_begin(state->dev, &conn_iter); drm_for_each_connector_iter(connector, &conn_iter) { struct drm_crtc_state *crtc_state; if (drm_atomic_get_new_connector_state(state, connector)) continue; encoder = connector->state->best_encoder; if (!encoder || !(encoder_mask & drm_encoder_mask(encoder))) continue; if (!disable_conflicting_encoders) { DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", encoder->base.id, encoder->name, connector->state->crtc->base.id, connector->state->crtc->name, connector->base.id, connector->name); ret = -EINVAL; goto out; } new_conn_state = drm_atomic_get_connector_state(state, connector); if (IS_ERR(new_conn_state)) { ret = PTR_ERR(new_conn_state); goto out; } DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n", encoder->base.id, encoder->name, new_conn_state->crtc->base.id, new_conn_state->crtc->name, connector->base.id, connector->name); crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); ret = drm_atomic_set_crtc_for_connector(new_conn_state, NULL); if (ret) goto out; if (!crtc_state->connector_mask) { ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, NULL); if (ret < 0) goto out; crtc_state->active = false; } } out: drm_connector_list_iter_end(&conn_iter); return ret; } static void set_best_encoder(struct drm_atomic_state *state, struct drm_connector_state *conn_state, struct drm_encoder *encoder) { struct drm_crtc_state *crtc_state; struct drm_crtc *crtc; if (conn_state->best_encoder) { /* Unset the encoder_mask in the old crtc state. */ crtc = conn_state->connector->state->crtc; /* A NULL crtc is an error here because we should have * duplicated a NULL best_encoder when crtc was NULL. * As an exception restoring duplicated atomic state * during resume is allowed, so don't warn when * best_encoder is equal to encoder we intend to set. */ WARN_ON(!crtc && encoder != conn_state->best_encoder); if (crtc) { crtc_state = drm_atomic_get_new_crtc_state(state, crtc); crtc_state->encoder_mask &= ~drm_encoder_mask(conn_state->best_encoder); } } if (encoder) { crtc = conn_state->crtc; WARN_ON(!crtc); if (crtc) { crtc_state = drm_atomic_get_new_crtc_state(state, crtc); crtc_state->encoder_mask |= drm_encoder_mask(encoder); } } conn_state->best_encoder = encoder; } static void steal_encoder(struct drm_atomic_state *state, struct drm_encoder *encoder) { struct drm_crtc_state *crtc_state; struct drm_connector *connector; struct drm_connector_state *old_connector_state, *new_connector_state; int i; for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { struct drm_crtc *encoder_crtc; if (new_connector_state->best_encoder != encoder) continue; encoder_crtc = old_connector_state->crtc; DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", encoder->base.id, encoder->name, encoder_crtc->base.id, encoder_crtc->name); set_best_encoder(state, new_connector_state, NULL); crtc_state = drm_atomic_get_new_crtc_state(state, encoder_crtc); crtc_state->connectors_changed = true; return; } } static int update_connector_routing(struct drm_atomic_state *state, struct drm_connector *connector, struct drm_connector_state *old_connector_state, struct drm_connector_state *new_connector_state) { const struct drm_connector_helper_funcs *funcs; struct drm_encoder *new_encoder; struct drm_crtc_state *crtc_state; DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", connector->base.id, connector->name); if (old_connector_state->crtc != new_connector_state->crtc) { if (old_connector_state->crtc) { crtc_state = drm_atomic_get_new_crtc_state(state, old_connector_state->crtc); crtc_state->connectors_changed = true; } if (new_connector_state->crtc) { crtc_state = drm_atomic_get_new_crtc_state(state, new_connector_state->crtc); crtc_state->connectors_changed = true; } } if (!new_connector_state->crtc) { DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", connector->base.id, connector->name); set_best_encoder(state, new_connector_state, NULL); return 0; } crtc_state = drm_atomic_get_new_crtc_state(state, new_connector_state->crtc); /* * For compatibility with legacy users, we want to make sure that * we allow DPMS On->Off modesets on unregistered connectors. Modesets * which would result in anything else must be considered invalid, to * avoid turning on new displays on dead connectors. * * Since the connector can be unregistered at any point during an * atomic check or commit, this is racy. But that's OK: all we care * about is ensuring that userspace can't do anything but shut off the * display on a connector that was destroyed after its been notified, * not before. */ if (drm_connector_is_unregistered(connector) && crtc_state->active) { DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] is not registered\n", connector->base.id, connector->name); return -EINVAL; } funcs = connector->helper_private; if (funcs->atomic_best_encoder) new_encoder = funcs->atomic_best_encoder(connector, new_connector_state); else if (funcs->best_encoder) new_encoder = funcs->best_encoder(connector); else new_encoder = pick_single_encoder_for_connector(connector); if (!new_encoder) { DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", connector->base.id, connector->name); return -EINVAL; } if (!drm_encoder_crtc_ok(new_encoder, new_connector_state->crtc)) { DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d:%s]\n", new_encoder->base.id, new_encoder->name, new_connector_state->crtc->base.id, new_connector_state->crtc->name); return -EINVAL; } if (new_encoder == new_connector_state->best_encoder) { set_best_encoder(state, new_connector_state, new_encoder); DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", connector->base.id, connector->name, new_encoder->base.id, new_encoder->name, new_connector_state->crtc->base.id, new_connector_state->crtc->name); return 0; } steal_encoder(state, new_encoder); set_best_encoder(state, new_connector_state, new_encoder); crtc_state->connectors_changed = true; DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", connector->base.id, connector->name, new_encoder->base.id, new_encoder->name, new_connector_state->crtc->base.id, new_connector_state->crtc->name); return 0; } static int mode_fixup(struct drm_atomic_state *state) { struct drm_crtc *crtc; struct drm_crtc_state *new_crtc_state; struct drm_connector *connector; struct drm_connector_state *new_conn_state; int i; int ret; for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { if (!new_crtc_state->mode_changed && !new_crtc_state->connectors_changed) continue; drm_mode_copy(&new_crtc_state->adjusted_mode, &new_crtc_state->mode); } for_each_new_connector_in_state(state, connector, new_conn_state, i) { const struct drm_encoder_helper_funcs *funcs; struct drm_encoder *encoder; WARN_ON(!!new_conn_state->best_encoder != !!new_conn_state->crtc); if (!new_conn_state->crtc || !new_conn_state->best_encoder) continue; new_crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); /* * Each encoder has at most one connector (since we always steal * it away), so we won't call ->mode_fixup twice. */ encoder = new_conn_state->best_encoder; funcs = encoder->helper_private; ret = drm_bridge_mode_fixup(encoder->bridge, &new_crtc_state->mode, &new_crtc_state->adjusted_mode); if (!ret) { DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); return -EINVAL; } if (funcs && funcs->atomic_check) { ret = funcs->atomic_check(encoder, new_crtc_state, new_conn_state); if (ret) { DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", encoder->base.id, encoder->name); return ret; } } else if (funcs && funcs->mode_fixup) { ret = funcs->mode_fixup(encoder, &new_crtc_state->mode, &new_crtc_state->adjusted_mode); if (!ret) { DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", encoder->base.id, encoder->name); return -EINVAL; } } } for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { const struct drm_crtc_helper_funcs *funcs; if (!new_crtc_state->enable) continue; if (!new_crtc_state->mode_changed && !new_crtc_state->connectors_changed) continue; funcs = crtc->helper_private; if (!funcs->mode_fixup) continue; ret = funcs->mode_fixup(crtc, &new_crtc_state->mode, &new_crtc_state->adjusted_mode); if (!ret) { DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", crtc->base.id, crtc->name); return -EINVAL; } } return 0; } static enum drm_mode_status mode_valid_path(struct drm_connector *connector, struct drm_encoder *encoder, struct drm_crtc *crtc, struct drm_display_mode *mode) { enum drm_mode_status ret; ret = drm_encoder_mode_valid(encoder, mode); if (ret != MODE_OK) { DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] mode_valid() failed\n", encoder->base.id, encoder->name); return ret; } ret = drm_bridge_mode_valid(encoder->bridge, mode); if (ret != MODE_OK) { DRM_DEBUG_ATOMIC("[BRIDGE] mode_valid() failed\n"); return ret; } ret = drm_crtc_mode_valid(crtc, mode); if (ret != MODE_OK) { DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode_valid() failed\n", crtc->base.id, crtc->name); return ret; } return ret; } static int mode_valid(struct drm_atomic_state *state) { struct drm_connector_state *conn_state; struct drm_connector *connector; int i; for_each_new_connector_in_state(state, connector, conn_state, i) { struct drm_encoder *encoder = conn_state->best_encoder; struct drm_crtc *crtc = conn_state->crtc; struct drm_crtc_state *crtc_state; enum drm_mode_status mode_status; struct drm_display_mode *mode; if (!crtc || !encoder) continue; crtc_state = drm_atomic_get_new_crtc_state(state, crtc); if (!crtc_state) continue; if (!crtc_state->mode_changed && !crtc_state->connectors_changed) continue; mode = &crtc_state->mode; mode_status = mode_valid_path(connector, encoder, crtc, mode); if (mode_status != MODE_OK) return -EINVAL; } return 0; } /** * drm_atomic_helper_check_modeset - validate state object for modeset changes * @dev: DRM device * @state: the driver state object * * Check the state object to see if the requested state is physically possible. * This does all the crtc and connector related computations for an atomic * update and adds any additional connectors needed for full modesets. It calls * the various per-object callbacks in the follow order: * * 1. &drm_connector_helper_funcs.atomic_best_encoder for determining the new encoder. * 2. &drm_connector_helper_funcs.atomic_check to validate the connector state. * 3. If it's determined a modeset is needed then all connectors on the affected crtc * crtc are added and &drm_connector_helper_funcs.atomic_check is run on them. * 4. &drm_encoder_helper_funcs.mode_valid, &drm_bridge_funcs.mode_valid and * &drm_crtc_helper_funcs.mode_valid are called on the affected components. * 5. &drm_bridge_funcs.mode_fixup is called on all encoder bridges. * 6. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state. * This function is only called when the encoder will be part of a configured crtc, * it must not be used for implementing connector property validation. * If this function is NULL, &drm_atomic_encoder_helper_funcs.mode_fixup is called * instead. * 7. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with crtc constraints. * * &drm_crtc_state.mode_changed is set when the input mode is changed. * &drm_crtc_state.connectors_changed is set when a connector is added or * removed from the crtc. &drm_crtc_state.active_changed is set when * &drm_crtc_state.active changes, which is used for DPMS. * See also: drm_atomic_crtc_needs_modeset() * * IMPORTANT: * * Drivers which set &drm_crtc_state.mode_changed (e.g. in their * &drm_plane_helper_funcs.atomic_check hooks if a plane update can't be done * without a full modeset) _must_ call this function afterwards after that * change. It is permitted to call this function multiple times for the same * update, e.g. when the &drm_crtc_helper_funcs.atomic_check functions depend * upon the adjusted dotclock for fifo space allocation and watermark * computation. * * RETURNS: * Zero for success or -errno */ int drm_atomic_helper_check_modeset(struct drm_device *dev, struct drm_atomic_state *state) { struct drm_crtc *crtc; struct drm_crtc_state *old_crtc_state, *new_crtc_state; struct drm_connector *connector; struct drm_connector_state *old_connector_state, *new_connector_state; int i, ret; unsigned connectors_mask = 0; for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { bool has_connectors = !!new_crtc_state->connector_mask; WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); if (!drm_mode_equal(&old_crtc_state->mode, &new_crtc_state->mode)) { DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", crtc->base.id, crtc->name); new_crtc_state->mode_changed = true; } if (old_crtc_state->enable != new_crtc_state->enable) { DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", crtc->base.id, crtc->name); /* * For clarity this assignment is done here, but * enable == 0 is only true when there are no * connectors and a NULL mode. * * The other way around is true as well. enable != 0 * iff connectors are attached and a mode is set. */ new_crtc_state->mode_changed = true; new_crtc_state->connectors_changed = true; } if (old_crtc_state->active != new_crtc_state->active) { DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", crtc->base.id, crtc->name); new_crtc_state->active_changed = true; } if (new_crtc_state->enable != has_connectors) { DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", crtc->base.id, crtc->name); return -EINVAL; } } ret = handle_conflicting_encoders(state, false); if (ret) return ret; for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { const struct drm_connector_helper_funcs *funcs = connector->helper_private; WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); /* * This only sets crtc->connectors_changed for routing changes, * drivers must set crtc->connectors_changed themselves when * connector properties need to be updated. */ ret = update_connector_routing(state, connector, old_connector_state, new_connector_state); if (ret) return ret; if (old_connector_state->crtc) { new_crtc_state = drm_atomic_get_new_crtc_state(state, old_connector_state->crtc); if (old_connector_state->link_status != new_connector_state->link_status) new_crtc_state->connectors_changed = true; if (old_connector_state->max_requested_bpc != new_connector_state->max_requested_bpc) new_crtc_state->connectors_changed = true; } if (funcs->atomic_check) ret = funcs->atomic_check(connector, new_connector_state); if (ret) return ret; connectors_mask |= BIT(i); } /* * After all the routing has been prepared we need to add in any * connector which is itself unchanged, but who's crtc changes it's * configuration. This must be done before calling mode_fixup in case a * crtc only changed its mode but has the same set of connectors. */ for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) continue; DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", crtc->base.id, crtc->name, new_crtc_state->enable ? 'y' : 'n', new_crtc_state->active ? 'y' : 'n'); ret = drm_atomic_add_affected_connectors(state, crtc); if (ret != 0) return ret; ret = drm_atomic_add_affected_planes(state, crtc); if (ret != 0) return ret; } /* * Iterate over all connectors again, to make sure atomic_check() * has been called on them when a modeset is forced. */ for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { const struct drm_connector_helper_funcs *funcs = connector->helper_private; if (connectors_mask & BIT(i)) continue; if (funcs->atomic_check) ret = funcs->atomic_check(connector, new_connector_state); if (ret) return ret; } ret = mode_valid(state); if (ret) return ret; return mode_fixup(state); } EXPORT_SYMBOL(drm_atomic_helper_check_modeset); /** * drm_atomic_helper_check_plane_state() - Check plane state for validity * @plane_state: plane state to check * @crtc_state: crtc state to check * @min_scale: minimum @src:@dest scaling factor in 16.16 fixed point * @max_scale: maximum @src:@dest scaling factor in 16.16 fixed point * @can_position: is it legal to position the plane such that it * doesn't cover the entire crtc? This will generally * only be false for primary planes. * @can_update_disabled: can the plane be updated while the crtc * is disabled? * * Checks that a desired plane update is valid, and updates various * bits of derived state (clipped coordinates etc.). Drivers that provide * their own plane handling rather than helper-provided implementations may * still wish to call this function to avoid duplication of error checking * code. * * RETURNS: * Zero if update appears valid, error code on failure */ int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state, const struct drm_crtc_state *crtc_state, int min_scale, int max_scale, bool can_position, bool can_update_disabled) { struct drm_framebuffer *fb = plane_state->fb; struct drm_rect *src = &plane_state->src; struct drm_rect *dst = &plane_state->dst; unsigned int rotation = plane_state->rotation; struct drm_rect clip = {}; int hscale, vscale; WARN_ON(plane_state->crtc && plane_state->crtc != crtc_state->crtc); *src = drm_plane_state_src(plane_state); *dst = drm_plane_state_dest(plane_state); if (!fb) { plane_state->visible = false; return 0; } /* crtc should only be NULL when disabling (i.e., !fb) */ if (WARN_ON(!plane_state->crtc)) { plane_state->visible = false; return 0; } if (!crtc_state->enable && !can_update_disabled) { DRM_DEBUG_KMS("Cannot update plane of a disabled CRTC.\n"); return -EINVAL; } drm_rect_rotate(src, fb->width << 16, fb->height << 16, rotation); /* Check scaling */ hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale); vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale); if (hscale < 0 || vscale < 0) { DRM_DEBUG_KMS("Invalid scaling of plane\n"); drm_rect_debug_print("src: ", &plane_state->src, true); drm_rect_debug_print("dst: ", &plane_state->dst, false); return -ERANGE; } if (crtc_state->enable) drm_mode_get_hv_timing(&crtc_state->mode, &clip.x2, &clip.y2); plane_state->visible = drm_rect_clip_scaled(src, dst, &clip); drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16, rotation); if (!plane_state->visible) /* * Plane isn't visible; some drivers can handle this * so we just return success here. Drivers that can't * (including those that use the primary plane helper's * update function) will return an error from their * update_plane handler. */ return 0; if (!can_position && !drm_rect_equals(dst, &clip)) { DRM_DEBUG_KMS("Plane must cover entire CRTC\n"); drm_rect_debug_print("dst: ", dst, false); drm_rect_debug_print("clip: ", &clip, false); return -EINVAL; } return 0; } EXPORT_SYMBOL(drm_atomic_helper_check_plane_state); /** * drm_atomic_helper_check_planes - validate state object for planes changes * @dev: DRM device * @state: the driver state object * * Check the state object to see if the requested state is physically possible. * This does all the plane update related checks using by calling into the * &drm_crtc_helper_funcs.atomic_check and &drm_plane_helper_funcs.atomic_check * hooks provided by the driver. * * It also sets &drm_crtc_state.planes_changed to indicate that a crtc has * updated planes. * * RETURNS: * Zero for success or -errno */ int drm_atomic_helper_check_planes(struct drm_device *dev, struct drm_atomic_state *state) { struct drm_crtc *crtc; struct drm_crtc_state *new_crtc_state; struct drm_plane *plane; struct drm_plane_state *new_plane_state, *old_plane_state; int i, ret = 0; for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { const struct drm_plane_helper_funcs *funcs; WARN_ON(!drm_modeset_is_locked(&plane->mutex)); funcs = plane->helper_private; drm_atomic_helper_plane_changed(state, old_plane_state, new_plane_state, plane); drm_atomic_helper_check_plane_damage(state, new_plane_state); if (!funcs || !funcs->atomic_check) continue; ret = funcs->atomic_check(plane, new_plane_state); if (ret) { DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", plane->base.id, plane->name); return ret; } } for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { const struct drm_crtc_helper_funcs *funcs; funcs = crtc->helper_private; if (!funcs || !funcs->atomic_check) continue; ret = funcs->atomic_check(crtc, new_crtc_state); if (ret) { DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", crtc->base.id, crtc->name); return ret; } } return ret; } EXPORT_SYMBOL(drm_atomic_helper_check_planes); /** * drm_atomic_helper_check - validate state object * @dev: DRM device * @state: the driver state object * * Check the state object to see if the requested state is physically possible. * Only crtcs and planes have check callbacks, so for any additional (global) * checking that a driver needs it can simply wrap that around this function. * Drivers without such needs can directly use this as their * &drm_mode_config_funcs.atomic_check callback. * * This just wraps the two parts of the state checking for planes and modeset * state in the default order: First it calls drm_atomic_helper_check_modeset() * and then drm_atomic_helper_check_planes(). The assumption is that the * @drm_plane_helper_funcs.atomic_check and @drm_crtc_helper_funcs.atomic_check * functions depend upon an updated adjusted_mode.clock to e.g. properly compute * watermarks. * * Note that zpos normalization will add all enable planes to the state which * might not desired for some drivers. * For example enable/disable of a cursor plane which have fixed zpos value * would trigger all other enabled planes to be forced to the state change. * * RETURNS: * Zero for success or -errno */ int drm_atomic_helper_check(struct drm_device *dev, struct drm_atomic_state *state) { int ret; ret = drm_atomic_helper_check_modeset(dev, state); if (ret) return ret; if (dev->mode_config.normalize_zpos) { ret = drm_atomic_normalize_zpos(dev, state); if (ret) return ret; } ret = drm_atomic_helper_check_planes(dev, state); if (ret) return ret; if (state->legacy_cursor_update) state->async_update = !drm_atomic_helper_async_check(dev, state); return ret; } EXPORT_SYMBOL(drm_atomic_helper_check); static void disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) { struct drm_connector *connector; struct drm_connector_state *old_conn_state, *new_conn_state; struct drm_crtc *crtc; struct drm_crtc_state *old_crtc_state, *new_crtc_state; int i; for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) { const struct drm_encoder_helper_funcs *funcs; struct drm_encoder *encoder; /* Shut down everything that's in the changeset and currently * still on. So need to check the old, saved state. */ if (!old_conn_state->crtc) continue; old_crtc_state = drm_atomic_get_old_crtc_state(old_state, old_conn_state->crtc); if (!old_crtc_state->active || !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) continue; encoder = old_conn_state->best_encoder; /* We shouldn't get this far if we didn't previously have * an encoder.. but WARN_ON() rather than explode. */ if (WARN_ON(!encoder)) continue; funcs = encoder->helper_private; DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", encoder->base.id, encoder->name); /* * Each encoder has at most one connector (since we always steal * it away), so we won't call disable hooks twice. */ drm_bridge_disable(encoder->bridge); /* Right function depends upon target state. */ if (funcs) { if (new_conn_state->crtc && funcs->prepare) funcs->prepare(encoder); else if (funcs->disable) funcs->disable(encoder); else if (funcs->dpms) funcs->dpms(encoder, DRM_MODE_DPMS_OFF); } drm_bridge_post_disable(encoder->bridge); } for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { const struct drm_crtc_helper_funcs *funcs; int ret; /* Shut down everything that needs a full modeset. */ if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) continue; if (!old_crtc_state->active) continue; funcs = crtc->helper_private; DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", crtc->base.id, crtc->name); /* Right function depends upon target state. */ if (new_crtc_state->enable && funcs->prepare) funcs->prepare(crtc); else if (funcs->atomic_disable) funcs->atomic_disable(crtc, old_crtc_state); else if (funcs->disable) funcs->disable(crtc); else funcs->dpms(crtc, DRM_MODE_DPMS_OFF); if (!(dev->irq_enabled && dev->num_crtcs)) continue; ret = drm_crtc_vblank_get(crtc); WARN_ONCE(ret != -EINVAL, "driver forgot to call drm_crtc_vblank_off()\n"); if (ret == 0) drm_crtc_vblank_put(crtc); } } /** * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state * @dev: DRM device * @old_state: atomic state object with old state structures * * This function updates all the various legacy modeset state pointers in * connectors, encoders and crtcs. It also updates the timestamping constants * used for precise vblank timestamps by calling * drm_calc_timestamping_constants(). * * Drivers can use this for building their own atomic commit if they don't have * a pure helper-based modeset implementation. * * Since these updates are not synchronized with lockings, only code paths * called from &drm_mode_config_helper_funcs.atomic_commit_tail can look at the * legacy state filled out by this helper. Defacto this means this helper and * the legacy state pointers are only really useful for transitioning an * existing driver to the atomic world. */ void drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, struct drm_atomic_state *old_state) { struct drm_connector *connector; struct drm_connector_state *old_conn_state, *new_conn_state; struct drm_crtc *crtc; struct drm_crtc_state *new_crtc_state; int i; /* clear out existing links and update dpms */ for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) { if (connector->encoder) { WARN_ON(!connector->encoder->crtc); connector->encoder->crtc = NULL; connector->encoder = NULL; } crtc = new_conn_state->crtc; if ((!crtc && old_conn_state->crtc) || (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { int mode = DRM_MODE_DPMS_OFF; if (crtc && crtc->state->active) mode = DRM_MODE_DPMS_ON; connector->dpms = mode; } } /* set new links */ for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { if (!new_conn_state->crtc) continue; if (WARN_ON(!new_conn_state->best_encoder)) continue; connector->encoder = new_conn_state->best_encoder; connector->encoder->crtc = new_conn_state->crtc; } /* set legacy state in the crtc structure */ for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { struct drm_plane *primary = crtc->primary; struct drm_plane_state *new_plane_state; crtc->mode = new_crtc_state->mode; crtc->enabled = new_crtc_state->enable; new_plane_state = drm_atomic_get_new_plane_state(old_state, primary); if (new_plane_state && new_plane_state->crtc == crtc) { crtc->x = new_plane_state->src_x >> 16; crtc->y = new_plane_state->src_y >> 16; } if (new_crtc_state->enable) drm_calc_timestamping_constants(crtc, &new_crtc_state->adjusted_mode); } } EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); static void crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) { struct drm_crtc *crtc; struct drm_crtc_state *new_crtc_state; struct drm_connector *connector; struct drm_connector_state *new_conn_state; int i; for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { const struct drm_crtc_helper_funcs *funcs; if (!new_crtc_state->mode_changed) continue; funcs = crtc->helper_private; if (new_crtc_state->enable && funcs->mode_set_nofb) { DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", crtc->base.id, crtc->name); funcs->mode_set_nofb(crtc); } } for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { const struct drm_encoder_helper_funcs *funcs; struct drm_encoder *encoder; struct drm_display_mode *mode, *adjusted_mode; if (!new_conn_state->best_encoder) continue; encoder = new_conn_state->best_encoder; funcs = encoder->helper_private; new_crtc_state = new_conn_state->crtc->state; mode = &new_crtc_state->mode; adjusted_mode = &new_crtc_state->adjusted_mode; if (!new_crtc_state->mode_changed) continue; DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", encoder->base.id, encoder->name); /* * Each encoder has at most one connector (since we always steal * it away), so we won't call mode_set hooks twice. */ if (funcs && funcs->atomic_mode_set) { funcs->atomic_mode_set(encoder, new_crtc_state, new_conn_state); } else if (funcs && funcs->mode_set) { funcs->mode_set(encoder, mode, adjusted_mode); } drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); } } /** * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs * @dev: DRM device * @old_state: atomic state object with old state structures * * This function shuts down all the outputs that need to be shut down and * prepares them (if required) with the new mode. * * For compatibility with legacy crtc helpers this should be called before * drm_atomic_helper_commit_planes(), which is what the default commit function * does. But drivers with different needs can group the modeset commits together * and do the plane commits at the end. This is useful for drivers doing runtime * PM since planes updates then only happen when the CRTC is actually enabled. */ void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, struct drm_atomic_state *old_state) { disable_outputs(dev, old_state); drm_atomic_helper_update_legacy_modeset_state(dev, old_state); crtc_set_mode(dev, old_state); } EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); static void drm_atomic_helper_commit_writebacks(struct drm_device *dev, struct drm_atomic_state *old_state) { struct drm_connector *connector; struct drm_connector_state *new_conn_state; int i; for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { const struct drm_connector_helper_funcs *funcs; funcs = connector->helper_private; if (!funcs->atomic_commit) continue; if (new_conn_state->writeback_job && new_conn_state->writeback_job->fb) { WARN_ON(connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK); funcs->atomic_commit(connector, new_conn_state); } } } /** * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs * @dev: DRM device * @old_state: atomic state object with old state structures * * This function enables all the outputs with the new configuration which had to * be turned off for the update. * * For compatibility with legacy crtc helpers this should be called after * drm_atomic_helper_commit_planes(), which is what the default commit function * does. But drivers with different needs can group the modeset commits together * and do the plane commits at the end. This is useful for drivers doing runtime * PM since planes updates then only happen when the CRTC is actually enabled. */ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, struct drm_atomic_state *old_state) { struct drm_crtc *crtc; struct drm_crtc_state *old_crtc_state; struct drm_crtc_state *new_crtc_state; struct drm_connector *connector; struct drm_connector_state *new_conn_state; int i; for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { const struct drm_crtc_helper_funcs *funcs; /* Need to filter out CRTCs where only planes change. */ if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) continue; if (!new_crtc_state->active) continue; funcs = crtc->helper_private; if (new_crtc_state->enable) { DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", crtc->base.id, crtc->name); if (funcs->atomic_enable) funcs->atomic_enable(crtc, old_crtc_state); else funcs->commit(crtc); } } for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { const struct drm_encoder_helper_funcs *funcs; struct drm_encoder *encoder; if (!new_conn_state->best_encoder) continue; if (!new_conn_state->crtc->state->active || !drm_atomic_crtc_needs_modeset(new_conn_state->crtc->state)) continue; encoder = new_conn_state->best_encoder; funcs = encoder->helper_private; DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", encoder->base.id, encoder->name); /* * Each encoder has at most one connector (since we always steal * it away), so we won't call enable hooks twice. */ drm_bridge_pre_enable(encoder->bridge); if (funcs) { if (funcs->enable) funcs->enable(encoder); else if (funcs->commit) funcs->commit(encoder); } drm_bridge_enable(encoder->bridge); } drm_atomic_helper_commit_writebacks(dev, old_state); } EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); /** * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state * @dev: DRM device * @state: atomic state object with old state structures * @pre_swap: If true, do an interruptible wait, and @state is the new state. * Otherwise @state is the old state. * * For implicit sync, driver should fish the exclusive fence out from the * incoming fb's and stash it in the drm_plane_state. This is called after * drm_atomic_helper_swap_state() so it uses the current plane state (and * just uses the atomic state to find the changed planes) * * Note that @pre_swap is needed since the point where we block for fences moves * around depending upon whether an atomic commit is blocking or * non-blocking. For non-blocking commit all waiting needs to happen after * drm_atomic_helper_swap_state() is called, but for blocking commits we want * to wait **before** we do anything that can't be easily rolled back. That is * before we call drm_atomic_helper_swap_state(). * * Returns zero if success or < 0 if dma_fence_wait() fails. */ int drm_atomic_helper_wait_for_fences(struct drm_device *dev, struct drm_atomic_state *state, bool pre_swap) { struct drm_plane *plane; struct drm_plane_state *new_plane_state; int i, ret; for_each_new_plane_in_state(state, plane, new_plane_state, i) { if (!new_plane_state->fence) continue; WARN_ON(!new_plane_state->fb); /* * If waiting for fences pre-swap (ie: nonblock), userspace can * still interrupt the operation. Instead of blocking until the * timer expires, make the wait interruptible. */ ret = dma_fence_wait(new_plane_state->fence, pre_swap); if (ret) return ret; dma_fence_put(new_plane_state->fence); new_plane_state->fence = NULL; } return 0; } EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); /** * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs * @dev: DRM device * @old_state: atomic state object with old state structures * * Helper to, after atomic commit, wait for vblanks on all effected * crtcs (ie. before cleaning up old framebuffers using * drm_atomic_helper_cleanup_planes()). It will only wait on CRTCs where the * framebuffers have actually changed to optimize for the legacy cursor and * plane update use-case. * * Drivers using the nonblocking commit tracking support initialized by calling * drm_atomic_helper_setup_commit() should look at * drm_atomic_helper_wait_for_flip_done() as an alternative. */ void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, struct drm_atomic_state *old_state) { struct drm_crtc *crtc; struct drm_crtc_state *old_crtc_state, *new_crtc_state; int i, ret; unsigned crtc_mask = 0; /* * Legacy cursor ioctls are completely unsynced, and userspace * relies on that (by doing tons of cursor updates). */ if (old_state->legacy_cursor_update) return; for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { if (!new_crtc_state->active) continue; ret = drm_crtc_vblank_get(crtc); if (ret != 0) continue; crtc_mask |= drm_crtc_mask(crtc); old_state->crtcs[i].last_vblank_count = drm_crtc_vblank_count(crtc); } for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { if (!(crtc_mask & drm_crtc_mask(crtc))) continue; ret = wait_event_timeout(dev->vblank[i].queue, old_state->crtcs[i].last_vblank_count != drm_crtc_vblank_count(crtc), msecs_to_jiffies(50)); WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n", crtc->base.id, crtc->name); drm_crtc_vblank_put(crtc); } } EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); /** * drm_atomic_helper_wait_for_flip_done - wait for all page flips to be done * @dev: DRM device * @old_state: atomic state object with old state structures * * Helper to, after atomic commit, wait for page flips on all effected * crtcs (ie. before cleaning up old framebuffers using * drm_atomic_helper_cleanup_planes()). Compared to * drm_atomic_helper_wait_for_vblanks() this waits for the completion of on all * CRTCs, assuming that cursors-only updates are signalling their completion * immediately (or using a different path). * * This requires that drivers use the nonblocking commit tracking support * initialized using drm_atomic_helper_setup_commit(). */ void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev, struct drm_atomic_state *old_state) { struct drm_crtc *crtc; int i; for (i = 0; i < dev->mode_config.num_crtc; i++) { struct drm_crtc_commit *commit = old_state->crtcs[i].commit; int ret; crtc = old_state->crtcs[i].ptr; if (!crtc || !commit) continue; ret = wait_for_completion_timeout(&commit->flip_done, 10 * HZ); if (ret == 0) DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", crtc->base.id, crtc->name); } if (old_state->fake_commit) complete_all(&old_state->fake_commit->flip_done); } EXPORT_SYMBOL(drm_atomic_helper_wait_for_flip_done); /** * drm_atomic_helper_commit_tail - commit atomic update to hardware * @old_state: atomic state object with old state structures * * This is the default implementation for the * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers * that do not support runtime_pm or do not need the CRTC to be * enabled to perform a commit. Otherwise, see * drm_atomic_helper_commit_tail_rpm(). * * Note that the default ordering of how the various stages are called is to * match the legacy modeset helper library closest. */ void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state) { struct drm_device *dev = old_state->dev; drm_atomic_helper_commit_modeset_disables(dev, old_state); drm_atomic_helper_commit_planes(dev, old_state, 0); drm_atomic_helper_commit_modeset_enables(dev, old_state); drm_atomic_helper_fake_vblank(old_state); drm_atomic_helper_commit_hw_done(old_state); drm_atomic_helper_wait_for_vblanks(dev, old_state); drm_atomic_helper_cleanup_planes(dev, old_state); } EXPORT_SYMBOL(drm_atomic_helper_commit_tail); /** * drm_atomic_helper_commit_tail_rpm - commit atomic update to hardware * @old_state: new modeset state to be committed * * This is an alternative implementation for the * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers * that support runtime_pm or need the CRTC to be enabled to perform a * commit. Otherwise, one should use the default implementation * drm_atomic_helper_commit_tail(). */ void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state) { struct drm_device *dev = old_state->dev; drm_atomic_helper_commit_modeset_disables(dev, old_state); drm_atomic_helper_commit_modeset_enables(dev, old_state); drm_atomic_helper_commit_planes(dev, old_state, DRM_PLANE_COMMIT_ACTIVE_ONLY); drm_atomic_helper_fake_vblank(old_state); drm_atomic_helper_commit_hw_done(old_state); drm_atomic_helper_wait_for_vblanks(dev, old_state); drm_atomic_helper_cleanup_planes(dev, old_state); } EXPORT_SYMBOL(drm_atomic_helper_commit_tail_rpm); static void commit_tail(struct drm_atomic_state *old_state) { struct drm_device *dev = old_state->dev; const struct drm_mode_config_helper_funcs *funcs; funcs = dev->mode_config.helper_private; drm_atomic_helper_wait_for_fences(dev, old_state, false); drm_atomic_helper_wait_for_dependencies(old_state); if (funcs && funcs->atomic_commit_tail) funcs->atomic_commit_tail(old_state); else drm_atomic_helper_commit_tail(old_state); drm_atomic_helper_commit_cleanup_done(old_state); drm_atomic_state_put(old_state); } static void commit_work(struct work_struct *work) { struct drm_atomic_state *state = container_of(work, struct drm_atomic_state, commit_work); commit_tail(state); } /** * drm_atomic_helper_async_check - check if state can be commited asynchronously * @dev: DRM device * @state: the driver state object * * This helper will check if it is possible to commit the state asynchronously. * Async commits are not supposed to swap the states like normal sync commits * but just do in-place changes on the current state. * * It will return 0 if the commit can happen in an asynchronous fashion or error * if not. Note that error just mean it can't be commited asynchronously, if it * fails the commit should be treated like a normal synchronous commit. */ int drm_atomic_helper_async_check(struct drm_device *dev, struct drm_atomic_state *state) { struct drm_crtc *crtc; struct drm_crtc_state *crtc_state; struct drm_plane *plane = NULL; struct drm_plane_state *old_plane_state = NULL; struct drm_plane_state *new_plane_state = NULL; const struct drm_plane_helper_funcs *funcs; int i, n_planes = 0; for_each_new_crtc_in_state(state, crtc, crtc_state, i) { if (drm_atomic_crtc_needs_modeset(crtc_state)) return -EINVAL; } for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) n_planes++; /* FIXME: we support only single plane updates for now */ if (n_planes != 1) return -EINVAL; if (!new_plane_state->crtc || old_plane_state->crtc != new_plane_state->crtc) return -EINVAL; /* * FIXME: Since prepare_fb and cleanup_fb are always called on * the new_plane_state for async updates we need to block framebuffer * changes. This prevents use of a fb that's been cleaned up and * double cleanups from occuring. */ if (old_plane_state->fb != new_plane_state->fb) return -EINVAL; funcs = plane->helper_private; if (!funcs->atomic_async_update) return -EINVAL; if (new_plane_state->fence) return -EINVAL; /* * Don't do an async update if there is an outstanding commit modifying * the plane. This prevents our async update's changes from getting * overridden by a previous synchronous update's state. */ if (old_plane_state->commit && !try_wait_for_completion(&old_plane_state->commit->hw_done)) return -EBUSY; return funcs->atomic_async_check(plane, new_plane_state); } EXPORT_SYMBOL(drm_atomic_helper_async_check); /** * drm_atomic_helper_async_commit - commit state asynchronously * @dev: DRM device * @state: the driver state object * * This function commits a state asynchronously, i.e., not vblank * synchronized. It should be used on a state only when * drm_atomic_async_check() succeeds. Async commits are not supposed to swap * the states like normal sync commits, but just do in-place changes on the * current state. */ void drm_atomic_helper_async_commit(struct drm_device *dev, struct drm_atomic_state *state) { struct drm_plane *plane; struct drm_plane_state *plane_state; const struct drm_plane_helper_funcs *funcs; int i; for_each_new_plane_in_state(state, plane, plane_state, i) { funcs = plane->helper_private; funcs->atomic_async_update(plane, plane_state); /* * ->atomic_async_update() is supposed to update the * plane->state in-place, make sure at least common * properties have been properly updated. */ WARN_ON_ONCE(plane->state->fb != plane_state->fb); WARN_ON_ONCE(plane->state->crtc_x != plane_state->crtc_x); WARN_ON_ONCE(plane->state->crtc_y != plane_state->crtc_y); WARN_ON_ONCE(plane->state->src_x != plane_state->src_x); WARN_ON_ONCE(plane->state->src_y != plane_state->src_y); } } EXPORT_SYMBOL(drm_atomic_helper_async_commit); /** * drm_atomic_helper_commit - commit validated state object * @dev: DRM device * @state: the driver state object * @nonblock: whether nonblocking behavior is requested. * * This function commits a with drm_atomic_helper_check() pre-validated state * object. This can still fail when e.g. the framebuffer reservation fails. This * function implements nonblocking commits, using * drm_atomic_helper_setup_commit() and related functions. * * Committing the actual hardware state is done through the * &drm_mode_config_helper_funcs.atomic_commit_tail callback, or it's default * implementation drm_atomic_helper_commit_tail(). * * RETURNS: * Zero for success or -errno. */ int drm_atomic_helper_commit(struct drm_device *dev, struct drm_atomic_state *state, bool nonblock) { int ret; if (state->async_update) { ret = drm_atomic_helper_prepare_planes(dev, state); if (ret) return ret; drm_atomic_helper_async_commit(dev, state); drm_atomic_helper_cleanup_planes(dev, state); return 0; } ret = drm_atomic_helper_setup_commit(state, nonblock); if (ret) return ret; INIT_WORK(&state->commit_work, commit_work); ret = drm_atomic_helper_prepare_planes(dev, state); if (ret) return ret; if (!nonblock) { ret = drm_atomic_helper_wait_for_fences(dev, state, true); if (ret) goto err; } /* * This is the point of no return - everything below never fails except * when the hw goes bonghits. Which means we can commit the new state on * the software side now. */ ret = drm_atomic_helper_swap_state(state, true); if (ret) goto err; /* * Everything below can be run asynchronously without the need to grab * any modeset locks at all under one condition: It must be guaranteed * that the asynchronous work has either been cancelled (if the driver * supports it, which at least requires that the framebuffers get * cleaned up with drm_atomic_helper_cleanup_planes()) or completed * before the new state gets committed on the software side with * drm_atomic_helper_swap_state(). * * This scheme allows new atomic state updates to be prepared and * checked in parallel to the asynchronous completion of the previous * update. Which is important since compositors need to figure out the * composition of the next frame right after having submitted the * current layout. * * NOTE: Commit work has multiple phases, first hardware commit, then * cleanup. We want them to overlap, hence need system_unbound_wq to * make sure work items don't artifically stall on each another. */ drm_atomic_state_get(state); if (nonblock) queue_work(system_unbound_wq, &state->commit_work); else commit_tail(state); return 0; err: drm_atomic_helper_cleanup_planes(dev, state); return ret; } EXPORT_SYMBOL(drm_atomic_helper_commit); /** * DOC: implementing nonblocking commit * * Nonblocking atomic commits have to be implemented in the following sequence: * * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function * which commit needs to call which can fail, so we want to run it first and * synchronously. * * 2. Synchronize with any outstanding nonblocking commit worker threads which * might be affected the new state update. This can be done by either cancelling * or flushing the work items, depending upon whether the driver can deal with * cancelled updates. Note that it is important to ensure that the framebuffer * cleanup is still done when cancelling. * * Asynchronous workers need to have sufficient parallelism to be able to run * different atomic commits on different CRTCs in parallel. The simplest way to * achive this is by running them on the &system_unbound_wq work queue. Note * that drivers are not required to split up atomic commits and run an * individual commit in parallel - userspace is supposed to do that if it cares. * But it might be beneficial to do that for modesets, since those necessarily * must be done as one global operation, and enabling or disabling a CRTC can * take a long time. But even that is not required. * * 3. The software state is updated synchronously with * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset * locks means concurrent callers never see inconsistent state. And doing this * while it's guaranteed that no relevant nonblocking worker runs means that * nonblocking workers do not need grab any locks. Actually they must not grab * locks, for otherwise the work flushing will deadlock. * * 4. Schedule a work item to do all subsequent steps, using the split-out * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and * then cleaning up the framebuffers after the old framebuffer is no longer * being displayed. * * The above scheme is implemented in the atomic helper libraries in * drm_atomic_helper_commit() using a bunch of helper functions. See * drm_atomic_helper_setup_commit() for a starting point. */ static int stall_checks(struct drm_crtc *crtc, bool nonblock) { struct drm_crtc_commit *commit, *stall_commit = NULL; bool completed = true; int i; long ret = 0; spin_lock(&crtc->commit_lock); i = 0; list_for_each_entry(commit, &crtc->commit_list, commit_entry) { if (i == 0) { completed = try_wait_for_completion(&commit->flip_done); /* Userspace is not allowed to get ahead of the previous * commit with nonblocking ones. */ if (!completed && nonblock) { spin_unlock(&crtc->commit_lock); return -EBUSY; } } else if (i == 1) { stall_commit = drm_crtc_commit_get(commit); break; } i++; } spin_unlock(&crtc->commit_lock); if (!stall_commit) return 0; /* We don't want to let commits get ahead of cleanup work too much, * stalling on 2nd previous commit means triple-buffer won't ever stall. */ ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done, 10*HZ); if (ret == 0) DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n", crtc->base.id, crtc->name); drm_crtc_commit_put(stall_commit); return ret < 0 ? ret : 0; } static void release_crtc_commit(struct completion *completion) { struct drm_crtc_commit *commit = container_of(completion, typeof(*commit), flip_done); drm_crtc_commit_put(commit); } static void init_commit(struct drm_crtc_commit *commit, struct drm_crtc *crtc) { init_completion(&commit->flip_done); init_completion(&commit->hw_done); init_completion(&commit->cleanup_done); INIT_LIST_HEAD(&commit->commit_entry); kref_init(&commit->ref); commit->crtc = crtc; } static struct drm_crtc_commit * crtc_or_fake_commit(struct drm_atomic_state *state, struct drm_crtc *crtc) { if (crtc) { struct drm_crtc_state *new_crtc_state; new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc); return new_crtc_state->commit; } if (!state->fake_commit) { state->fake_commit = kzalloc(sizeof(*state->fake_commit), GFP_KERNEL); if (!state->fake_commit) return NULL; init_commit(state->fake_commit, NULL); } return state->fake_commit; } /** * drm_atomic_helper_setup_commit - setup possibly nonblocking commit * @state: new modeset state to be committed * @nonblock: whether nonblocking behavior is requested. * * This function prepares @state to be used by the atomic helper's support for * nonblocking commits. Drivers using the nonblocking commit infrastructure * should always call this function from their * &drm_mode_config_funcs.atomic_commit hook. * * To be able to use this support drivers need to use a few more helper * functions. drm_atomic_helper_wait_for_dependencies() must be called before * actually committing the hardware state, and for nonblocking commits this call * must be placed in the async worker. See also drm_atomic_helper_swap_state() * and it's stall parameter, for when a driver's commit hooks look at the * &drm_crtc.state, &drm_plane.state or &drm_connector.state pointer directly. * * Completion of the hardware commit step must be signalled using * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed * to read or change any permanent software or hardware modeset state. The only * exception is state protected by other means than &drm_modeset_lock locks. * Only the free standing @state with pointers to the old state structures can * be inspected, e.g. to clean up old buffers using * drm_atomic_helper_cleanup_planes(). * * At the very end, before cleaning up @state drivers must call * drm_atomic_helper_commit_cleanup_done(). * * This is all implemented by in drm_atomic_helper_commit(), giving drivers a * complete and easy-to-use default implementation of the atomic_commit() hook. * * The tracking of asynchronously executed and still pending commits is done * using the core structure &drm_crtc_commit. * * By default there's no need to clean up resources allocated by this function * explicitly: drm_atomic_state_default_clear() will take care of that * automatically. * * Returns: * * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast, * -ENOMEM on allocation failures and -EINTR when a signal is pending. */ int drm_atomic_helper_setup_commit(struct drm_atomic_state *state, bool nonblock) { struct drm_crtc *crtc; struct drm_crtc_state *old_crtc_state, *new_crtc_state; struct drm_connector *conn; struct drm_connector_state *old_conn_state, *new_conn_state; struct drm_plane *plane; struct drm_plane_state *old_plane_state, *new_plane_state; struct drm_crtc_commit *commit; int i, ret; for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { commit = kzalloc(sizeof(*commit), GFP_KERNEL); if (!commit) return -ENOMEM; init_commit(commit, crtc); new_crtc_state->commit = commit; ret = stall_checks(crtc, nonblock); if (ret) return ret; /* Drivers only send out events when at least either current or * new CRTC state is active. Complete right away if everything * stays off. */ if (!old_crtc_state->active && !new_crtc_state->active) { complete_all(&commit->flip_done); continue; } /* Legacy cursor updates are fully unsynced. */ if (state->legacy_cursor_update) { complete_all(&commit->flip_done); continue; } if (!new_crtc_state->event) { commit->event = kzalloc(sizeof(*commit->event), GFP_KERNEL); if (!commit->event) return -ENOMEM; new_crtc_state->event = commit->event; } new_crtc_state->event->base.completion = &commit->flip_done; new_crtc_state->event->base.completion_release = release_crtc_commit; drm_crtc_commit_get(commit); commit->abort_completion = true; state->crtcs[i].commit = commit; drm_crtc_commit_get(commit); } for_each_oldnew_connector_in_state(state, conn, old_conn_state, new_conn_state, i) { /* Userspace is not allowed to get ahead of the previous * commit with nonblocking ones. */ if (nonblock && old_conn_state->commit && !try_wait_for_completion(&old_conn_state->commit->flip_done)) return -EBUSY; /* Always track connectors explicitly for e.g. link retraining. */ commit = crtc_or_fake_commit(state, new_conn_state->crtc ?: old_conn_state->crtc); if (!commit) return -ENOMEM; new_conn_state->commit = drm_crtc_commit_get(commit); } for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { /* Userspace is not allowed to get ahead of the previous * commit with nonblocking ones. */ if (nonblock && old_plane_state->commit && !try_wait_for_completion(&old_plane_state->commit->flip_done)) return -EBUSY; /* Always track planes explicitly for async pageflip support. */ commit = crtc_or_fake_commit(state, new_plane_state->crtc ?: old_plane_state->crtc); if (!commit) return -ENOMEM; new_plane_state->commit = drm_crtc_commit_get(commit); } return 0; } EXPORT_SYMBOL(drm_atomic_helper_setup_commit); /** * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits * @old_state: atomic state object with old state structures * * This function waits for all preceeding commits that touch the same CRTC as * @old_state to both be committed to the hardware (as signalled by * drm_atomic_helper_commit_hw_done) and executed by the hardware (as signalled * by calling drm_crtc_send_vblank_event() on the &drm_crtc_state.event). * * This is part of the atomic helper support for nonblocking commits, see * drm_atomic_helper_setup_commit() for an overview. */ void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state) { struct drm_crtc *crtc; struct drm_crtc_state *old_crtc_state; struct drm_plane *plane; struct drm_plane_state *old_plane_state; struct drm_connector *conn; struct drm_connector_state *old_conn_state; struct drm_crtc_commit *commit; int i; long ret; for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { commit = old_crtc_state->commit; if (!commit) continue; ret = wait_for_completion_timeout(&commit->hw_done, 10*HZ); if (ret == 0) DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", crtc->base.id, crtc->name); /* Currently no support for overwriting flips, hence * stall for previous one to execute completely. */ ret = wait_for_completion_timeout(&commit->flip_done, 10*HZ); if (ret == 0) DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", crtc->base.id, crtc->name); } for_each_old_connector_in_state(old_state, conn, old_conn_state, i) { commit = old_conn_state->commit; if (!commit) continue; ret = wait_for_completion_timeout(&commit->hw_done, 10*HZ); if (ret == 0) DRM_ERROR("[CONNECTOR:%d:%s] hw_done timed out\n", conn->base.id, conn->name); /* Currently no support for overwriting flips, hence * stall for previous one to execute completely. */ ret = wait_for_completion_timeout(&commit->flip_done, 10*HZ); if (ret == 0) DRM_ERROR("[CONNECTOR:%d:%s] flip_done timed out\n", conn->base.id, conn->name); } for_each_old_plane_in_state(old_state, plane, old_plane_state, i) { commit = old_plane_state->commit; if (!commit) continue; ret = wait_for_completion_timeout(&commit->hw_done, 10*HZ); if (ret == 0) DRM_ERROR("[PLANE:%d:%s] hw_done timed out\n", plane->base.id, plane->name); /* Currently no support for overwriting flips, hence * stall for previous one to execute completely. */ ret = wait_for_completion_timeout(&commit->flip_done, 10*HZ); if (ret == 0) DRM_ERROR("[PLANE:%d:%s] flip_done timed out\n", plane->base.id, plane->name); } } EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies); /** * drm_atomic_helper_fake_vblank - fake VBLANK events if needed * @old_state: atomic state object with old state structures * * This function walks all CRTCs and fake VBLANK events on those with * &drm_crtc_state.no_vblank set to true and &drm_crtc_state.event != NULL. * The primary use of this function is writeback connectors working in oneshot * mode and faking VBLANK events. In this case they only fake the VBLANK event * when a job is queued, and any change to the pipeline that does not touch the * connector is leading to timeouts when calling * drm_atomic_helper_wait_for_vblanks() or * drm_atomic_helper_wait_for_flip_done(). * * This is part of the atomic helper support for nonblocking commits, see * drm_atomic_helper_setup_commit() for an overview. */ void drm_atomic_helper_fake_vblank(struct drm_atomic_state *old_state) { struct drm_crtc_state *new_crtc_state; struct drm_crtc *crtc; int i; for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { unsigned long flags; if (!new_crtc_state->no_vblank) continue; spin_lock_irqsave(&old_state->dev->event_lock, flags); if (new_crtc_state->event) { drm_crtc_send_vblank_event(crtc, new_crtc_state->event); new_crtc_state->event = NULL; } spin_unlock_irqrestore(&old_state->dev->event_lock, flags); } } EXPORT_SYMBOL(drm_atomic_helper_fake_vblank); /** * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit * @old_state: atomic state object with old state structures * * This function is used to signal completion of the hardware commit step. After * this step the driver is not allowed to read or change any permanent software * or hardware modeset state. The only exception is state protected by other * means than &drm_modeset_lock locks. * * Drivers should try to postpone any expensive or delayed cleanup work after * this function is called. * * This is part of the atomic helper support for nonblocking commits, see * drm_atomic_helper_setup_commit() for an overview. */ void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state) { struct drm_crtc *crtc; struct drm_crtc_state *old_crtc_state, *new_crtc_state; struct drm_crtc_commit *commit; int i; for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { commit = new_crtc_state->commit; if (!commit) continue; /* * copy new_crtc_state->commit to old_crtc_state->commit, * it's unsafe to touch new_crtc_state after hw_done, * but we still need to do so in cleanup_done(). */ if (old_crtc_state->commit) drm_crtc_commit_put(old_crtc_state->commit); old_crtc_state->commit = drm_crtc_commit_get(commit); /* backend must have consumed any event by now */ WARN_ON(new_crtc_state->event); complete_all(&commit->hw_done); } if (old_state->fake_commit) { complete_all(&old_state->fake_commit->hw_done); complete_all(&old_state->fake_commit->flip_done); } } EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done); /** * drm_atomic_helper_commit_cleanup_done - signal completion of commit * @old_state: atomic state object with old state structures * * This signals completion of the atomic update @old_state, including any * cleanup work. If used, it must be called right before calling * drm_atomic_state_put(). * * This is part of the atomic helper support for nonblocking commits, see * drm_atomic_helper_setup_commit() for an overview. */ void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state) { struct drm_crtc *crtc; struct drm_crtc_state *old_crtc_state; struct drm_crtc_commit *commit; int i; for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { commit = old_crtc_state->commit; if (WARN_ON(!commit)) continue; complete_all(&commit->cleanup_done); WARN_ON(!try_wait_for_completion(&commit->hw_done)); spin_lock(&crtc->commit_lock); list_del(&commit->commit_entry); spin_unlock(&crtc->commit_lock); } if (old_state->fake_commit) { complete_all(&old_state->fake_commit->cleanup_done); WARN_ON(!try_wait_for_completion(&old_state->fake_commit->hw_done)); } } EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done); /** * drm_atomic_helper_prepare_planes - prepare plane resources before commit * @dev: DRM device * @state: atomic state object with new state structures * * This function prepares plane state, specifically framebuffers, for the new * configuration, by calling &drm_plane_helper_funcs.prepare_fb. If any failure * is encountered this function will call &drm_plane_helper_funcs.cleanup_fb on * any already successfully prepared framebuffer. * * Returns: * 0 on success, negative error code on failure. */ int drm_atomic_helper_prepare_planes(struct drm_device *dev, struct drm_atomic_state *state) { struct drm_plane *plane; struct drm_plane_state *new_plane_state; int ret, i, j; for_each_new_plane_in_state(state, plane, new_plane_state, i) { const struct drm_plane_helper_funcs *funcs; funcs = plane->helper_private; if (funcs->prepare_fb) { ret = funcs->prepare_fb(plane, new_plane_state); if (ret) goto fail; } } return 0; fail: for_each_new_plane_in_state(state, plane, new_plane_state, j) { const struct drm_plane_helper_funcs *funcs; if (j >= i) continue; funcs = plane->helper_private; if (funcs->cleanup_fb) funcs->cleanup_fb(plane, new_plane_state); } return ret; } EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); static bool plane_crtc_active(const struct drm_plane_state *state) { return state->crtc && state->crtc->state->active; } /** * drm_atomic_helper_commit_planes - commit plane state * @dev: DRM device * @old_state: atomic state object with old state structures * @flags: flags for committing plane state * * This function commits the new plane state using the plane and atomic helper * functions for planes and crtcs. It assumes that the atomic state has already * been pushed into the relevant object state pointers, since this step can no * longer fail. * * It still requires the global state object @old_state to know which planes and * crtcs need to be updated though. * * Note that this function does all plane updates across all CRTCs in one step. * If the hardware can't support this approach look at * drm_atomic_helper_commit_planes_on_crtc() instead. * * Plane parameters can be updated by applications while the associated CRTC is * disabled. The DRM/KMS core will store the parameters in the plane state, * which will be available to the driver when the CRTC is turned on. As a result * most drivers don't need to be immediately notified of plane updates for a * disabled CRTC. * * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in * @flags in order not to receive plane update notifications related to a * disabled CRTC. This avoids the need to manually ignore plane updates in * driver code when the driver and/or hardware can't or just don't need to deal * with updates on disabled CRTCs, for example when supporting runtime PM. * * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant * display controllers require to disable a CRTC's planes when the CRTC is * disabled. This function would skip the &drm_plane_helper_funcs.atomic_disable * call for a plane if the CRTC of the old plane state needs a modesetting * operation. Of course, the drivers need to disable the planes in their CRTC * disable callbacks since no one else would do that. * * The drm_atomic_helper_commit() default implementation doesn't set the * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers. * This should not be copied blindly by drivers. */ void drm_atomic_helper_commit_planes(struct drm_device *dev, struct drm_atomic_state *old_state, uint32_t flags) { struct drm_crtc *crtc; struct drm_crtc_state *old_crtc_state, *new_crtc_state; struct drm_plane *plane; struct drm_plane_state *old_plane_state, *new_plane_state; int i; bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY; bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET; for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { const struct drm_crtc_helper_funcs *funcs; funcs = crtc->helper_private; if (!funcs || !funcs->atomic_begin) continue; if (active_only && !new_crtc_state->active) continue; funcs->atomic_begin(crtc, old_crtc_state); } for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) { const struct drm_plane_helper_funcs *funcs; bool disabling; funcs = plane->helper_private; if (!funcs) continue; disabling = drm_atomic_plane_disabling(old_plane_state, new_plane_state); if (active_only) { /* * Skip planes related to inactive CRTCs. If the plane * is enabled use the state of the current CRTC. If the * plane is being disabled use the state of the old * CRTC to avoid skipping planes being disabled on an * active CRTC. */ if (!disabling && !plane_crtc_active(new_plane_state)) continue; if (disabling && !plane_crtc_active(old_plane_state)) continue; } /* * Special-case disabling the plane if drivers support it. */ if (disabling && funcs->atomic_disable) { struct drm_crtc_state *crtc_state; crtc_state = old_plane_state->crtc->state; if (drm_atomic_crtc_needs_modeset(crtc_state) && no_disable) continue; funcs->atomic_disable(plane, old_plane_state); } else if (new_plane_state->crtc || disabling) { funcs->atomic_update(plane, old_plane_state); } } for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { const struct drm_crtc_helper_funcs *funcs; funcs = crtc->helper_private; if (!funcs || !funcs->atomic_flush) continue; if (active_only && !new_crtc_state->active) continue; funcs->atomic_flush(crtc, old_crtc_state); } } EXPORT_SYMBOL(drm_atomic_helper_commit_planes); /** * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc * @old_crtc_state: atomic state object with the old crtc state * * This function commits the new plane state using the plane and atomic helper * functions for planes on the specific crtc. It assumes that the atomic state * has already been pushed into the relevant object state pointers, since this * step can no longer fail. * * This function is useful when plane updates should be done crtc-by-crtc * instead of one global step like drm_atomic_helper_commit_planes() does. * * This function can only be savely used when planes are not allowed to move * between different CRTCs because this function doesn't handle inter-CRTC * depencies. Callers need to ensure that either no such depencies exist, * resolve them through ordering of commit calls or through some other means. */ void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) { const struct drm_crtc_helper_funcs *crtc_funcs; struct drm_crtc *crtc = old_crtc_state->crtc; struct drm_atomic_state *old_state = old_crtc_state->state; struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); struct drm_plane *plane; unsigned plane_mask; plane_mask = old_crtc_state->plane_mask; plane_mask |= new_crtc_state->plane_mask; crtc_funcs = crtc->helper_private; if (crtc_funcs && crtc_funcs->atomic_begin) crtc_funcs->atomic_begin(crtc, old_crtc_state); drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(old_state, plane); struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(old_state, plane); const struct drm_plane_helper_funcs *plane_funcs; plane_funcs = plane->helper_private; if (!old_plane_state || !plane_funcs) continue; WARN_ON(new_plane_state->crtc && new_plane_state->crtc != crtc); if (drm_atomic_plane_disabling(old_plane_state, new_plane_state) && plane_funcs->atomic_disable) plane_funcs->atomic_disable(plane, old_plane_state); else if (new_plane_state->crtc || drm_atomic_plane_disabling(old_plane_state, new_plane_state)) plane_funcs->atomic_update(plane, old_plane_state); } if (crtc_funcs && crtc_funcs->atomic_flush) crtc_funcs->atomic_flush(crtc, old_crtc_state); } EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); /** * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes * @old_crtc_state: atomic state object with the old CRTC state * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks * * Disables all planes associated with the given CRTC. This can be * used for instance in the CRTC helper atomic_disable callback to disable * all planes. * * If the atomic-parameter is set the function calls the CRTC's * atomic_begin hook before and atomic_flush hook after disabling the * planes. * * It is a bug to call this function without having implemented the * &drm_plane_helper_funcs.atomic_disable plane hook. */ void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state, bool atomic) { struct drm_crtc *crtc = old_crtc_state->crtc; const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; struct drm_plane *plane; if (atomic && crtc_funcs && crtc_funcs->atomic_begin) crtc_funcs->atomic_begin(crtc, NULL); drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) { const struct drm_plane_helper_funcs *plane_funcs = plane->helper_private; if (!plane_funcs) continue; WARN_ON(!plane_funcs->atomic_disable); if (plane_funcs->atomic_disable) plane_funcs->atomic_disable(plane, NULL); } if (atomic && crtc_funcs && crtc_funcs->atomic_flush) crtc_funcs->atomic_flush(crtc, NULL); } EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); /** * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit * @dev: DRM device * @old_state: atomic state object with old state structures * * This function cleans up plane state, specifically framebuffers, from the old * configuration. Hence the old configuration must be perserved in @old_state to * be able to call this function. * * This function must also be called on the new state when the atomic update * fails at any point after calling drm_atomic_helper_prepare_planes(). */ void drm_atomic_helper_cleanup_planes(struct drm_device *dev, struct drm_atomic_state *old_state) { struct drm_plane *plane; struct drm_plane_state *old_plane_state, *new_plane_state; int i; for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) { const struct drm_plane_helper_funcs *funcs; struct drm_plane_state *plane_state; /* * This might be called before swapping when commit is aborted, * in which case we have to cleanup the new state. */ if (old_plane_state == plane->state) plane_state = new_plane_state; else plane_state = old_plane_state; funcs = plane->helper_private; if (funcs->cleanup_fb) funcs->cleanup_fb(plane, plane_state); } } EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); /** * drm_atomic_helper_swap_state - store atomic state into current sw state * @state: atomic state * @stall: stall for preceeding commits * * This function stores the atomic state into the current state pointers in all * driver objects. It should be called after all failing steps have been done * and succeeded, but before the actual hardware state is committed. * * For cleanup and error recovery the current state for all changed objects will * be swapped into @state. * * With that sequence it fits perfectly into the plane prepare/cleanup sequence: * * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. * * 2. Do any other steps that might fail. * * 3. Put the staged state into the current state pointers with this function. * * 4. Actually commit the hardware state. * * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 * contains the old state. Also do any other cleanup required with that state. * * @stall must be set when nonblocking commits for this driver directly access * the &drm_plane.state, &drm_crtc.state or &drm_connector.state pointer. With * the current atomic helpers this is almost always the case, since the helpers * don't pass the right state structures to the callbacks. * * Returns: * * Returns 0 on success. Can return -ERESTARTSYS when @stall is true and the * waiting for the previous commits has been interrupted. */ int drm_atomic_helper_swap_state(struct drm_atomic_state *state, bool stall) { int i, ret; struct drm_connector *connector; struct drm_connector_state *old_conn_state, *new_conn_state; struct drm_crtc *crtc; struct drm_crtc_state *old_crtc_state, *new_crtc_state; struct drm_plane *plane; struct drm_plane_state *old_plane_state, *new_plane_state; struct drm_crtc_commit *commit; struct drm_private_obj *obj; struct drm_private_state *old_obj_state, *new_obj_state; if (stall) { /* * We have to stall for hw_done here before * drm_atomic_helper_wait_for_dependencies() because flip * depth > 1 is not yet supported by all drivers. As long as * obj->state is directly dereferenced anywhere in the drivers * atomic_commit_tail function, then it's unsafe to swap state * before drm_atomic_helper_commit_hw_done() is called. */ for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) { commit = old_crtc_state->commit; if (!commit) continue; ret = wait_for_completion_interruptible(&commit->hw_done); if (ret) return ret; } for_each_old_connector_in_state(state, connector, old_conn_state, i) { commit = old_conn_state->commit; if (!commit) continue; ret = wait_for_completion_interruptible(&commit->hw_done); if (ret) return ret; } for_each_old_plane_in_state(state, plane, old_plane_state, i) { commit = old_plane_state->commit; if (!commit) continue; ret = wait_for_completion_interruptible(&commit->hw_done); if (ret) return ret; } } for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) { WARN_ON(connector->state != old_conn_state); old_conn_state->state = state; new_conn_state->state = NULL; state->connectors[i].state = old_conn_state; connector->state = new_conn_state; } for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { WARN_ON(crtc->state != old_crtc_state); old_crtc_state->state = state; new_crtc_state->state = NULL; state->crtcs[i].state = old_crtc_state; crtc->state = new_crtc_state; if (new_crtc_state->commit) { spin_lock(&crtc->commit_lock); list_add(&new_crtc_state->commit->commit_entry, &crtc->commit_list); spin_unlock(&crtc->commit_lock); new_crtc_state->commit->event = NULL; } } for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { WARN_ON(plane->state != old_plane_state); old_plane_state->state = state; new_plane_state->state = NULL; state->planes[i].state = old_plane_state; plane->state = new_plane_state; } for_each_oldnew_private_obj_in_state(state, obj, old_obj_state, new_obj_state, i) { WARN_ON(obj->state != old_obj_state); old_obj_state->state = state; new_obj_state->state = NULL; state->private_objs[i].state = old_obj_state; obj->state = new_obj_state; } return 0; } EXPORT_SYMBOL(drm_atomic_helper_swap_state); /** * drm_atomic_helper_update_plane - Helper for primary plane update using atomic * @plane: plane object to update * @crtc: owning CRTC of owning plane * @fb: framebuffer to flip onto plane * @crtc_x: x offset of primary plane on crtc * @crtc_y: y offset of primary plane on crtc * @crtc_w: width of primary plane rectangle on crtc * @crtc_h: height of primary plane rectangle on crtc * @src_x: x offset of @fb for panning * @src_y: y offset of @fb for panning * @src_w: width of source rectangle in @fb * @src_h: height of source rectangle in @fb * @ctx: lock acquire context * * Provides a default plane update handler using the atomic driver interface. * * RETURNS: * Zero on success, error code on failure */ int drm_atomic_helper_update_plane(struct drm_plane *plane, struct drm_crtc *crtc, struct drm_framebuffer *fb, int crtc_x, int crtc_y, unsigned int crtc_w, unsigned int crtc_h, uint32_t src_x, uint32_t src_y, uint32_t src_w, uint32_t src_h, struct drm_modeset_acquire_ctx *ctx) { struct drm_atomic_state *state; struct drm_plane_state *plane_state; int ret = 0; state = drm_atomic_state_alloc(plane->dev); if (!state) return -ENOMEM; state->acquire_ctx = ctx; plane_state = drm_atomic_get_plane_state(state, plane); if (IS_ERR(plane_state)) { ret = PTR_ERR(plane_state); goto fail; } ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); if (ret != 0) goto fail; drm_atomic_set_fb_for_plane(plane_state, fb); plane_state->crtc_x = crtc_x; plane_state->crtc_y = crtc_y; plane_state->crtc_w = crtc_w; plane_state->crtc_h = crtc_h; plane_state->src_x = src_x; plane_state->src_y = src_y; plane_state->src_w = src_w; plane_state->src_h = src_h; if (plane == crtc->cursor) state->legacy_cursor_update = true; ret = drm_atomic_commit(state); fail: drm_atomic_state_put(state); return ret; } EXPORT_SYMBOL(drm_atomic_helper_update_plane); /** * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic * @plane: plane to disable * @ctx: lock acquire context * * Provides a default plane disable handler using the atomic driver interface. * * RETURNS: * Zero on success, error code on failure */ int drm_atomic_helper_disable_plane(struct drm_plane *plane, struct drm_modeset_acquire_ctx *ctx) { struct drm_atomic_state *state; struct drm_plane_state *plane_state; int ret = 0; state = drm_atomic_state_alloc(plane->dev); if (!state) return -ENOMEM; state->acquire_ctx = ctx; plane_state = drm_atomic_get_plane_state(state, plane); if (IS_ERR(plane_state)) { ret = PTR_ERR(plane_state); goto fail; } if (plane_state->crtc && plane_state->crtc->cursor == plane) plane_state->state->legacy_cursor_update = true; ret = __drm_atomic_helper_disable_plane(plane, plane_state); if (ret != 0) goto fail; ret = drm_atomic_commit(state); fail: drm_atomic_state_put(state); return ret; } EXPORT_SYMBOL(drm_atomic_helper_disable_plane); /* just used from fb-helper and atomic-helper: */ int __drm_atomic_helper_disable_plane(struct drm_plane *plane, struct drm_plane_state *plane_state) { int ret; ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); if (ret != 0) return ret; drm_atomic_set_fb_for_plane(plane_state, NULL); plane_state->crtc_x = 0; plane_state->crtc_y = 0; plane_state->crtc_w = 0; plane_state->crtc_h = 0; plane_state->src_x = 0; plane_state->src_y = 0; plane_state->src_w = 0; plane_state->src_h = 0; return 0; } static int update_output_state(struct drm_atomic_state *state, struct drm_mode_set *set) { struct drm_device *dev = set->crtc->dev; struct drm_crtc *crtc; struct drm_crtc_state *new_crtc_state; struct drm_connector *connector; struct drm_connector_state *new_conn_state; int ret, i; ret = drm_modeset_lock(&dev->mode_config.connection_mutex, state->acquire_ctx); if (ret) return ret; /* First disable all connectors on the target crtc. */ ret = drm_atomic_add_affected_connectors(state, set->crtc); if (ret) return ret; for_each_new_connector_in_state(state, connector, new_conn_state, i) { if (new_conn_state->crtc == set->crtc) { ret = drm_atomic_set_crtc_for_connector(new_conn_state, NULL); if (ret) return ret; /* Make sure legacy setCrtc always re-trains */ new_conn_state->link_status = DRM_LINK_STATUS_GOOD; } } /* Then set all connectors from set->connectors on the target crtc */ for (i = 0; i < set->num_connectors; i++) { new_conn_state = drm_atomic_get_connector_state(state, set->connectors[i]); if (IS_ERR(new_conn_state)) return PTR_ERR(new_conn_state); ret = drm_atomic_set_crtc_for_connector(new_conn_state, set->crtc); if (ret) return ret; } for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { /* Don't update ->enable for the CRTC in the set_config request, * since a mismatch would indicate a bug in the upper layers. * The actual modeset code later on will catch any * inconsistencies here. */ if (crtc == set->crtc) continue; if (!new_crtc_state->connector_mask) { ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state, NULL); if (ret < 0) return ret; new_crtc_state->active = false; } } return 0; } /** * drm_atomic_helper_set_config - set a new config from userspace * @set: mode set configuration * @ctx: lock acquisition context * * Provides a default crtc set_config handler using the atomic driver interface. * * NOTE: For backwards compatibility with old userspace this automatically * resets the "link-status" property to GOOD, to force any link * re-training. The SETCRTC ioctl does not define whether an update does * need a full modeset or just a plane update, hence we're allowed to do * that. See also drm_connector_set_link_status_property(). * * Returns: * Returns 0 on success, negative errno numbers on failure. */ int drm_atomic_helper_set_config(struct drm_mode_set *set, struct drm_modeset_acquire_ctx *ctx) { struct drm_atomic_state *state; struct drm_crtc *crtc = set->crtc; int ret = 0; state = drm_atomic_state_alloc(crtc->dev); if (!state) return -ENOMEM; state->acquire_ctx = ctx; ret = __drm_atomic_helper_set_config(set, state); if (ret != 0) goto fail; ret = handle_conflicting_encoders(state, true); if (ret) return ret; ret = drm_atomic_commit(state); fail: drm_atomic_state_put(state); return ret; } EXPORT_SYMBOL(drm_atomic_helper_set_config); /* just used from fb-helper and atomic-helper: */ int __drm_atomic_helper_set_config(struct drm_mode_set *set, struct drm_atomic_state *state) { struct drm_crtc_state *crtc_state; struct drm_plane_state *primary_state; struct drm_crtc *crtc = set->crtc; int hdisplay, vdisplay; int ret; crtc_state = drm_atomic_get_crtc_state(state, crtc); if (IS_ERR(crtc_state)) return PTR_ERR(crtc_state); primary_state = drm_atomic_get_plane_state(state, crtc->primary); if (IS_ERR(primary_state)) return PTR_ERR(primary_state); if (!set->mode) { WARN_ON(set->fb); WARN_ON(set->num_connectors); ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); if (ret != 0) return ret; crtc_state->active = false; ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); if (ret != 0) return ret; drm_atomic_set_fb_for_plane(primary_state, NULL); goto commit; } WARN_ON(!set->fb); WARN_ON(!set->num_connectors); ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); if (ret != 0) return ret; crtc_state->active = true; ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); if (ret != 0) return ret; drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay); drm_atomic_set_fb_for_plane(primary_state, set->fb); primary_state->crtc_x = 0; primary_state->crtc_y = 0; primary_state->crtc_w = hdisplay; primary_state->crtc_h = vdisplay; primary_state->src_x = set->x << 16; primary_state->src_y = set->y << 16; if (drm_rotation_90_or_270(primary_state->rotation)) { primary_state->src_w = vdisplay << 16; primary_state->src_h = hdisplay << 16; } else { primary_state->src_w = hdisplay << 16; primary_state->src_h = vdisplay << 16; } commit: ret = update_output_state(state, set); if (ret) return ret; return 0; } static int __drm_atomic_helper_disable_all(struct drm_device *dev, struct drm_modeset_acquire_ctx *ctx, bool clean_old_fbs) { struct drm_atomic_state *state; struct drm_connector_state *conn_state; struct drm_connector *conn; struct drm_plane_state *plane_state; struct drm_plane *plane; struct drm_crtc_state *crtc_state; struct drm_crtc *crtc; int ret, i; state = drm_atomic_state_alloc(dev); if (!state) return -ENOMEM; state->acquire_ctx = ctx; drm_for_each_crtc(crtc, dev) { crtc_state = drm_atomic_get_crtc_state(state, crtc); if (IS_ERR(crtc_state)) { ret = PTR_ERR(crtc_state); goto free; } crtc_state->active = false; ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, NULL); if (ret < 0) goto free; ret = drm_atomic_add_affected_planes(state, crtc); if (ret < 0) goto free; ret = drm_atomic_add_affected_connectors(state, crtc); if (ret < 0) goto free; } for_each_new_connector_in_state(state, conn, conn_state, i) { ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); if (ret < 0) goto free; } for_each_new_plane_in_state(state, plane, plane_state, i) { ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); if (ret < 0) goto free; drm_atomic_set_fb_for_plane(plane_state, NULL); } ret = drm_atomic_commit(state); free: drm_atomic_state_put(state); return ret; } /** * drm_atomic_helper_disable_all - disable all currently active outputs * @dev: DRM device * @ctx: lock acquisition context * * Loops through all connectors, finding those that aren't turned off and then * turns them off by setting their DPMS mode to OFF and deactivating the CRTC * that they are connected to. * * This is used for example in suspend/resume to disable all currently active * functions when suspending. If you just want to shut down everything at e.g. * driver unload, look at drm_atomic_helper_shutdown(). * * Note that if callers haven't already acquired all modeset locks this might * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). * * Returns: * 0 on success or a negative error code on failure. * * See also: * drm_atomic_helper_suspend(), drm_atomic_helper_resume() and * drm_atomic_helper_shutdown(). */ int drm_atomic_helper_disable_all(struct drm_device *dev, struct drm_modeset_acquire_ctx *ctx) { return __drm_atomic_helper_disable_all(dev, ctx, false); } EXPORT_SYMBOL(drm_atomic_helper_disable_all); /** * drm_atomic_helper_shutdown - shutdown all CRTC * @dev: DRM device * * This shuts down all CRTC, which is useful for driver unloading. Shutdown on * suspend should instead be handled with drm_atomic_helper_suspend(), since * that also takes a snapshot of the modeset state to be restored on resume. * * This is just a convenience wrapper around drm_atomic_helper_disable_all(), * and it is the atomic version of drm_crtc_force_disable_all(). */ void drm_atomic_helper_shutdown(struct drm_device *dev) { struct drm_modeset_acquire_ctx ctx; int ret; DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret); ret = __drm_atomic_helper_disable_all(dev, &ctx, true); if (ret) DRM_ERROR("Disabling all crtc's during unload failed with %i\n", ret); DRM_MODESET_LOCK_ALL_END(ctx, ret); } EXPORT_SYMBOL(drm_atomic_helper_shutdown); /** * drm_atomic_helper_duplicate_state - duplicate an atomic state object * @dev: DRM device * @ctx: lock acquisition context * * Makes a copy of the current atomic state by looping over all objects and * duplicating their respective states. This is used for example by suspend/ * resume support code to save the state prior to suspend such that it can * be restored upon resume. * * Note that this treats atomic state as persistent between save and restore. * Drivers must make sure that this is possible and won't result in confusion * or erroneous behaviour. * * Note that if callers haven't already acquired all modeset locks this might * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). * * Returns: * A pointer to the copy of the atomic state object on success or an * ERR_PTR()-encoded error code on failure. * * See also: * drm_atomic_helper_suspend(), drm_atomic_helper_resume() */ struct drm_atomic_state * drm_atomic_helper_duplicate_state(struct drm_device *dev, struct drm_modeset_acquire_ctx *ctx) { struct drm_atomic_state *state; struct drm_connector *conn; struct drm_connector_list_iter conn_iter; struct drm_plane *plane; struct drm_crtc *crtc; int err = 0; state = drm_atomic_state_alloc(dev); if (!state) return ERR_PTR(-ENOMEM); state->acquire_ctx = ctx; drm_for_each_crtc(crtc, dev) { struct drm_crtc_state *crtc_state; crtc_state = drm_atomic_get_crtc_state(state, crtc); if (IS_ERR(crtc_state)) { err = PTR_ERR(crtc_state); goto free; } } drm_for_each_plane(plane, dev) { struct drm_plane_state *plane_state; plane_state = drm_atomic_get_plane_state(state, plane); if (IS_ERR(plane_state)) { err = PTR_ERR(plane_state); goto free; } } drm_connector_list_iter_begin(dev, &conn_iter); drm_for_each_connector_iter(conn, &conn_iter) { struct drm_connector_state *conn_state; conn_state = drm_atomic_get_connector_state(state, conn); if (IS_ERR(conn_state)) { err = PTR_ERR(conn_state); drm_connector_list_iter_end(&conn_iter); goto free; } } drm_connector_list_iter_end(&conn_iter); /* clear the acquire context so that it isn't accidentally reused */ state->acquire_ctx = NULL; free: if (err < 0) { drm_atomic_state_put(state); state = ERR_PTR(err); } return state; } EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); /** * drm_atomic_helper_suspend - subsystem-level suspend helper * @dev: DRM device * * Duplicates the current atomic state, disables all active outputs and then * returns a pointer to the original atomic state to the caller. Drivers can * pass this pointer to the drm_atomic_helper_resume() helper upon resume to * restore the output configuration that was active at the time the system * entered suspend. * * Note that it is potentially unsafe to use this. The atomic state object * returned by this function is assumed to be persistent. Drivers must ensure * that this holds true. Before calling this function, drivers must make sure * to suspend fbdev emulation so that nothing can be using the device. * * Returns: * A pointer to a copy of the state before suspend on success or an ERR_PTR()- * encoded error code on failure. Drivers should store the returned atomic * state object and pass it to the drm_atomic_helper_resume() helper upon * resume. * * See also: * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), * drm_atomic_helper_resume(), drm_atomic_helper_commit_duplicated_state() */ struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) { struct drm_modeset_acquire_ctx ctx; struct drm_atomic_state *state; int err; /* This can never be returned, but it makes the compiler happy */ state = ERR_PTR(-EINVAL); DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err); state = drm_atomic_helper_duplicate_state(dev, &ctx); if (IS_ERR(state)) goto unlock; err = drm_atomic_helper_disable_all(dev, &ctx); if (err < 0) { drm_atomic_state_put(state); state = ERR_PTR(err); goto unlock; } unlock: DRM_MODESET_LOCK_ALL_END(ctx, err); if (err) return ERR_PTR(err); return state; } EXPORT_SYMBOL(drm_atomic_helper_suspend); /** * drm_atomic_helper_commit_duplicated_state - commit duplicated state * @state: duplicated atomic state to commit * @ctx: pointer to acquire_ctx to use for commit. * * The state returned by drm_atomic_helper_duplicate_state() and * drm_atomic_helper_suspend() is partially invalid, and needs to * be fixed up before commit. * * Returns: * 0 on success or a negative error code on failure. * * See also: * drm_atomic_helper_suspend() */ int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state, struct drm_modeset_acquire_ctx *ctx) { int i, ret; struct drm_plane *plane; struct drm_plane_state *new_plane_state; struct drm_connector *connector; struct drm_connector_state *new_conn_state; struct drm_crtc *crtc; struct drm_crtc_state *new_crtc_state; state->acquire_ctx = ctx; for_each_new_plane_in_state(state, plane, new_plane_state, i) state->planes[i].old_state = plane->state; for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) state->crtcs[i].old_state = crtc->state; for_each_new_connector_in_state(state, connector, new_conn_state, i) state->connectors[i].old_state = connector->state; ret = drm_atomic_commit(state); state->acquire_ctx = NULL; return ret; } EXPORT_SYMBOL(drm_atomic_helper_commit_duplicated_state); /** * drm_atomic_helper_resume - subsystem-level resume helper * @dev: DRM device * @state: atomic state to resume to * * Calls drm_mode_config_reset() to synchronize hardware and software states, * grabs all modeset locks and commits the atomic state object. This can be * used in conjunction with the drm_atomic_helper_suspend() helper to * implement suspend/resume for drivers that support atomic mode-setting. * * Returns: * 0 on success or a negative error code on failure. * * See also: * drm_atomic_helper_suspend() */ int drm_atomic_helper_resume(struct drm_device *dev, struct drm_atomic_state *state) { struct drm_modeset_acquire_ctx ctx; int err; drm_mode_config_reset(dev); DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err); err = drm_atomic_helper_commit_duplicated_state(state, &ctx); DRM_MODESET_LOCK_ALL_END(ctx, err); drm_atomic_state_put(state); return err; } EXPORT_SYMBOL(drm_atomic_helper_resume); static int page_flip_common(struct drm_atomic_state *state, struct drm_crtc *crtc, struct drm_framebuffer *fb, struct drm_pending_vblank_event *event, uint32_t flags) { struct drm_plane *plane = crtc->primary; struct drm_plane_state *plane_state; struct drm_crtc_state *crtc_state; int ret = 0; crtc_state = drm_atomic_get_crtc_state(state, crtc); if (IS_ERR(crtc_state)) return PTR_ERR(crtc_state); crtc_state->event = event; crtc_state->pageflip_flags = flags; plane_state = drm_atomic_get_plane_state(state, plane); if (IS_ERR(plane_state)) return PTR_ERR(plane_state); ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); if (ret != 0) return ret; drm_atomic_set_fb_for_plane(plane_state, fb); /* Make sure we don't accidentally do a full modeset. */ state->allow_modeset = false; if (!crtc_state->active) { DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled, rejecting legacy flip\n", crtc->base.id, crtc->name); return -EINVAL; } return ret; } /** * drm_atomic_helper_page_flip - execute a legacy page flip * @crtc: DRM crtc * @fb: DRM framebuffer * @event: optional DRM event to signal upon completion * @flags: flip flags for non-vblank sync'ed updates * @ctx: lock acquisition context * * Provides a default &drm_crtc_funcs.page_flip implementation * using the atomic driver interface. * * Returns: * Returns 0 on success, negative errno numbers on failure. * * See also: * drm_atomic_helper_page_flip_target() */ int drm_atomic_helper_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, struct drm_pending_vblank_event *event, uint32_t flags, struct drm_modeset_acquire_ctx *ctx) { struct drm_plane *plane = crtc->primary; struct drm_atomic_state *state; int ret = 0; state = drm_atomic_state_alloc(plane->dev); if (!state) return -ENOMEM; state->acquire_ctx = ctx; ret = page_flip_common(state, crtc, fb, event, flags); if (ret != 0) goto fail; ret = drm_atomic_nonblocking_commit(state); fail: drm_atomic_state_put(state); return ret; } EXPORT_SYMBOL(drm_atomic_helper_page_flip); /** * drm_atomic_helper_page_flip_target - do page flip on target vblank period. * @crtc: DRM crtc * @fb: DRM framebuffer * @event: optional DRM event to signal upon completion * @flags: flip flags for non-vblank sync'ed updates * @target: specifying the target vblank period when the flip to take effect * @ctx: lock acquisition context * * Provides a default &drm_crtc_funcs.page_flip_target implementation. * Similar to drm_atomic_helper_page_flip() with extra parameter to specify * target vblank period to flip. * * Returns: * Returns 0 on success, negative errno numbers on failure. */ int drm_atomic_helper_page_flip_target(struct drm_crtc *crtc, struct drm_framebuffer *fb, struct drm_pending_vblank_event *event, uint32_t flags, uint32_t target, struct drm_modeset_acquire_ctx *ctx) { struct drm_plane *plane = crtc->primary; struct drm_atomic_state *state; struct drm_crtc_state *crtc_state; int ret = 0; state = drm_atomic_state_alloc(plane->dev); if (!state) return -ENOMEM; state->acquire_ctx = ctx; ret = page_flip_common(state, crtc, fb, event, flags); if (ret != 0) goto fail; crtc_state = drm_atomic_get_new_crtc_state(state, crtc); if (WARN_ON(!crtc_state)) { ret = -EINVAL; goto fail; } crtc_state->target_vblank = target; ret = drm_atomic_nonblocking_commit(state); fail: drm_atomic_state_put(state); return ret; } EXPORT_SYMBOL(drm_atomic_helper_page_flip_target); /** * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table * @crtc: CRTC object * @red: red correction table * @green: green correction table * @blue: green correction table * @size: size of the tables * @ctx: lock acquire context * * Implements support for legacy gamma correction table for drivers * that support color management through the DEGAMMA_LUT/GAMMA_LUT * properties. See drm_crtc_enable_color_mgmt() and the containing chapter for * how the atomic color management and gamma tables work. */ int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, u16 *blue, uint32_t size, struct drm_modeset_acquire_ctx *ctx) { struct drm_device *dev = crtc->dev; struct drm_atomic_state *state; struct drm_crtc_state *crtc_state; struct drm_property_blob *blob = NULL; struct drm_color_lut *blob_data; int i, ret = 0; bool replaced; state = drm_atomic_state_alloc(crtc->dev); if (!state) return -ENOMEM; blob = drm_property_create_blob(dev, sizeof(struct drm_color_lut) * size, NULL); if (IS_ERR(blob)) { ret = PTR_ERR(blob); blob = NULL; goto fail; } /* Prepare GAMMA_LUT with the legacy values. */ blob_data = blob->data; for (i = 0; i < size; i++) { blob_data[i].red = red[i]; blob_data[i].green = green[i]; blob_data[i].blue = blue[i]; } state->acquire_ctx = ctx; crtc_state = drm_atomic_get_crtc_state(state, crtc); if (IS_ERR(crtc_state)) { ret = PTR_ERR(crtc_state); goto fail; } /* Reset DEGAMMA_LUT and CTM properties. */ replaced = drm_property_replace_blob(&crtc_state->degamma_lut, NULL); replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL); replaced |= drm_property_replace_blob(&crtc_state->gamma_lut, blob); crtc_state->color_mgmt_changed |= replaced; ret = drm_atomic_commit(state); fail: drm_atomic_state_put(state); drm_property_blob_put(blob); return ret; } EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set);
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