3507 lines
108 KiB
C
3507 lines
108 KiB
C
/*
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* Copyright (C) 2014 Red Hat
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* Copyright (C) 2014 Intel Corp.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Rob Clark <robdclark@gmail.com>
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* Daniel Vetter <daniel.vetter@ffwll.ch>
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*/
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#include <linux/dma-fence.h>
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#include <linux/ktime.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_atomic_uapi.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_damage_helper.h>
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#include <drm/drm_device.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_plane_helper.h>
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#include <drm/drm_print.h>
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#include <drm/drm_self_refresh_helper.h>
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#include <drm/drm_vblank.h>
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#include <drm/drm_writeback.h>
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#include "drm_crtc_helper_internal.h"
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#include "drm_crtc_internal.h"
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/**
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* DOC: overview
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*
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* This helper library provides implementations of check and commit functions on
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* top of the CRTC modeset helper callbacks and the plane helper callbacks. It
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* also provides convenience implementations for the atomic state handling
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* callbacks for drivers which don't need to subclass the drm core structures to
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* add their own additional internal state.
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*
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* This library also provides default implementations for the check callback in
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* drm_atomic_helper_check() and for the commit callback with
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* drm_atomic_helper_commit(). But the individual stages and callbacks are
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* exposed to allow drivers to mix and match and e.g. use the plane helpers only
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* together with a driver private modeset implementation.
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*
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* This library also provides implementations for all the legacy driver
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* interfaces on top of the atomic interface. See drm_atomic_helper_set_config(),
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* drm_atomic_helper_disable_plane(), and the various functions to implement
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* set_property callbacks. New drivers must not implement these functions
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* themselves but must use the provided helpers.
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*
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* The atomic helper uses the same function table structures as all other
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* modesetting helpers. See the documentation for &struct drm_crtc_helper_funcs,
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* struct &drm_encoder_helper_funcs and &struct drm_connector_helper_funcs. It
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* also shares the &struct drm_plane_helper_funcs function table with the plane
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* helpers.
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*/
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static void
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drm_atomic_helper_plane_changed(struct drm_atomic_state *state,
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struct drm_plane_state *old_plane_state,
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struct drm_plane_state *plane_state,
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struct drm_plane *plane)
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{
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struct drm_crtc_state *crtc_state;
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if (old_plane_state->crtc) {
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crtc_state = drm_atomic_get_new_crtc_state(state,
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old_plane_state->crtc);
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if (WARN_ON(!crtc_state))
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return;
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crtc_state->planes_changed = true;
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}
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if (plane_state->crtc) {
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crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc);
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if (WARN_ON(!crtc_state))
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return;
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crtc_state->planes_changed = true;
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}
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}
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static int handle_conflicting_encoders(struct drm_atomic_state *state,
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bool disable_conflicting_encoders)
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{
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struct drm_connector_state *new_conn_state;
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struct drm_connector *connector;
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struct drm_connector_list_iter conn_iter;
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struct drm_encoder *encoder;
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unsigned encoder_mask = 0;
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int i, ret = 0;
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/*
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* First loop, find all newly assigned encoders from the connectors
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* part of the state. If the same encoder is assigned to multiple
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* connectors bail out.
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*/
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for_each_new_connector_in_state(state, connector, new_conn_state, i) {
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const struct drm_connector_helper_funcs *funcs = connector->helper_private;
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struct drm_encoder *new_encoder;
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if (!new_conn_state->crtc)
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continue;
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if (funcs->atomic_best_encoder)
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new_encoder = funcs->atomic_best_encoder(connector,
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state);
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else if (funcs->best_encoder)
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new_encoder = funcs->best_encoder(connector);
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else
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new_encoder = drm_connector_get_single_encoder(connector);
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if (new_encoder) {
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if (encoder_mask & drm_encoder_mask(new_encoder)) {
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DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n",
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new_encoder->base.id, new_encoder->name,
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connector->base.id, connector->name);
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return -EINVAL;
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}
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encoder_mask |= drm_encoder_mask(new_encoder);
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}
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}
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if (!encoder_mask)
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return 0;
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/*
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* Second loop, iterate over all connectors not part of the state.
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*
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* If a conflicting encoder is found and disable_conflicting_encoders
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* is not set, an error is returned. Userspace can provide a solution
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* through the atomic ioctl.
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*
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* If the flag is set conflicting connectors are removed from the CRTC
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* and the CRTC is disabled if no encoder is left. This preserves
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* compatibility with the legacy set_config behavior.
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*/
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drm_connector_list_iter_begin(state->dev, &conn_iter);
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drm_for_each_connector_iter(connector, &conn_iter) {
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struct drm_crtc_state *crtc_state;
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if (drm_atomic_get_new_connector_state(state, connector))
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continue;
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encoder = connector->state->best_encoder;
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if (!encoder || !(encoder_mask & drm_encoder_mask(encoder)))
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continue;
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if (!disable_conflicting_encoders) {
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DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n",
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encoder->base.id, encoder->name,
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connector->state->crtc->base.id,
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connector->state->crtc->name,
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connector->base.id, connector->name);
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ret = -EINVAL;
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goto out;
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}
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new_conn_state = drm_atomic_get_connector_state(state, connector);
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if (IS_ERR(new_conn_state)) {
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ret = PTR_ERR(new_conn_state);
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goto out;
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}
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DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n",
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encoder->base.id, encoder->name,
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new_conn_state->crtc->base.id, new_conn_state->crtc->name,
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connector->base.id, connector->name);
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crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
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ret = drm_atomic_set_crtc_for_connector(new_conn_state, NULL);
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if (ret)
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goto out;
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if (!crtc_state->connector_mask) {
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ret = drm_atomic_set_mode_prop_for_crtc(crtc_state,
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NULL);
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if (ret < 0)
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goto out;
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crtc_state->active = false;
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}
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}
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out:
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drm_connector_list_iter_end(&conn_iter);
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return ret;
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}
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static void
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set_best_encoder(struct drm_atomic_state *state,
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struct drm_connector_state *conn_state,
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struct drm_encoder *encoder)
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{
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struct drm_crtc_state *crtc_state;
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struct drm_crtc *crtc;
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if (conn_state->best_encoder) {
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/* Unset the encoder_mask in the old crtc state. */
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crtc = conn_state->connector->state->crtc;
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/* A NULL crtc is an error here because we should have
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* duplicated a NULL best_encoder when crtc was NULL.
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* As an exception restoring duplicated atomic state
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* during resume is allowed, so don't warn when
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* best_encoder is equal to encoder we intend to set.
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*/
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WARN_ON(!crtc && encoder != conn_state->best_encoder);
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if (crtc) {
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crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
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crtc_state->encoder_mask &=
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~drm_encoder_mask(conn_state->best_encoder);
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}
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}
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if (encoder) {
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crtc = conn_state->crtc;
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WARN_ON(!crtc);
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if (crtc) {
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crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
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crtc_state->encoder_mask |=
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drm_encoder_mask(encoder);
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}
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}
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conn_state->best_encoder = encoder;
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}
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static void
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steal_encoder(struct drm_atomic_state *state,
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struct drm_encoder *encoder)
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{
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struct drm_crtc_state *crtc_state;
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struct drm_connector *connector;
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struct drm_connector_state *old_connector_state, *new_connector_state;
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int i;
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for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) {
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struct drm_crtc *encoder_crtc;
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if (new_connector_state->best_encoder != encoder)
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continue;
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encoder_crtc = old_connector_state->crtc;
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DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n",
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encoder->base.id, encoder->name,
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encoder_crtc->base.id, encoder_crtc->name);
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set_best_encoder(state, new_connector_state, NULL);
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crtc_state = drm_atomic_get_new_crtc_state(state, encoder_crtc);
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crtc_state->connectors_changed = true;
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return;
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}
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}
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static int
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update_connector_routing(struct drm_atomic_state *state,
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struct drm_connector *connector,
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struct drm_connector_state *old_connector_state,
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struct drm_connector_state *new_connector_state)
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{
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const struct drm_connector_helper_funcs *funcs;
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struct drm_encoder *new_encoder;
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struct drm_crtc_state *crtc_state;
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DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n",
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connector->base.id,
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connector->name);
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if (old_connector_state->crtc != new_connector_state->crtc) {
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if (old_connector_state->crtc) {
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crtc_state = drm_atomic_get_new_crtc_state(state, old_connector_state->crtc);
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crtc_state->connectors_changed = true;
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}
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if (new_connector_state->crtc) {
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crtc_state = drm_atomic_get_new_crtc_state(state, new_connector_state->crtc);
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crtc_state->connectors_changed = true;
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}
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}
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if (!new_connector_state->crtc) {
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DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n",
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connector->base.id,
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connector->name);
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set_best_encoder(state, new_connector_state, NULL);
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return 0;
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}
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crtc_state = drm_atomic_get_new_crtc_state(state,
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new_connector_state->crtc);
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/*
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* For compatibility with legacy users, we want to make sure that
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* we allow DPMS On->Off modesets on unregistered connectors. Modesets
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* which would result in anything else must be considered invalid, to
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* avoid turning on new displays on dead connectors.
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*
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* Since the connector can be unregistered at any point during an
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* atomic check or commit, this is racy. But that's OK: all we care
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* about is ensuring that userspace can't do anything but shut off the
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* display on a connector that was destroyed after it's been notified,
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* not before.
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*
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* Additionally, we also want to ignore connector registration when
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* we're trying to restore an atomic state during system resume since
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* there's a chance the connector may have been destroyed during the
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* process, but it's better to ignore that then cause
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* drm_atomic_helper_resume() to fail.
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*/
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if (!state->duplicated && drm_connector_is_unregistered(connector) &&
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crtc_state->active) {
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DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] is not registered\n",
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connector->base.id, connector->name);
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return -EINVAL;
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}
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funcs = connector->helper_private;
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if (funcs->atomic_best_encoder)
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new_encoder = funcs->atomic_best_encoder(connector, state);
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else if (funcs->best_encoder)
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new_encoder = funcs->best_encoder(connector);
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else
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new_encoder = drm_connector_get_single_encoder(connector);
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if (!new_encoder) {
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DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n",
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connector->base.id,
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connector->name);
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return -EINVAL;
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}
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if (!drm_encoder_crtc_ok(new_encoder, new_connector_state->crtc)) {
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DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d:%s]\n",
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new_encoder->base.id,
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new_encoder->name,
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new_connector_state->crtc->base.id,
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new_connector_state->crtc->name);
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return -EINVAL;
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}
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if (new_encoder == new_connector_state->best_encoder) {
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set_best_encoder(state, new_connector_state, new_encoder);
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DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n",
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connector->base.id,
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connector->name,
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new_encoder->base.id,
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new_encoder->name,
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new_connector_state->crtc->base.id,
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new_connector_state->crtc->name);
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return 0;
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}
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steal_encoder(state, new_encoder);
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set_best_encoder(state, new_connector_state, new_encoder);
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crtc_state->connectors_changed = true;
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DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n",
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connector->base.id,
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connector->name,
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new_encoder->base.id,
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new_encoder->name,
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new_connector_state->crtc->base.id,
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new_connector_state->crtc->name);
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return 0;
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}
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static int
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mode_fixup(struct drm_atomic_state *state)
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{
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struct drm_crtc *crtc;
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struct drm_crtc_state *new_crtc_state;
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struct drm_connector *connector;
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struct drm_connector_state *new_conn_state;
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int i;
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int ret;
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for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
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if (!new_crtc_state->mode_changed &&
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!new_crtc_state->connectors_changed)
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continue;
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drm_mode_copy(&new_crtc_state->adjusted_mode, &new_crtc_state->mode);
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}
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for_each_new_connector_in_state(state, connector, new_conn_state, i) {
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const struct drm_encoder_helper_funcs *funcs;
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struct drm_encoder *encoder;
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struct drm_bridge *bridge;
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WARN_ON(!!new_conn_state->best_encoder != !!new_conn_state->crtc);
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if (!new_conn_state->crtc || !new_conn_state->best_encoder)
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continue;
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new_crtc_state =
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drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
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|
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/*
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* Each encoder has at most one connector (since we always steal
|
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* it away), so we won't call ->mode_fixup twice.
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*/
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encoder = new_conn_state->best_encoder;
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funcs = encoder->helper_private;
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bridge = drm_bridge_chain_get_first_bridge(encoder);
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ret = drm_atomic_bridge_chain_check(bridge,
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new_crtc_state,
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new_conn_state);
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if (ret) {
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DRM_DEBUG_ATOMIC("Bridge atomic check failed\n");
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return ret;
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}
|
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|
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if (funcs && funcs->atomic_check) {
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ret = funcs->atomic_check(encoder, new_crtc_state,
|
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new_conn_state);
|
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if (ret) {
|
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DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n",
|
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encoder->base.id, encoder->name);
|
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return ret;
|
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}
|
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} else if (funcs && funcs->mode_fixup) {
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ret = funcs->mode_fixup(encoder, &new_crtc_state->mode,
|
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&new_crtc_state->adjusted_mode);
|
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if (!ret) {
|
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DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n",
|
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encoder->base.id, encoder->name);
|
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return -EINVAL;
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}
|
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}
|
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}
|
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|
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for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
|
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const struct drm_crtc_helper_funcs *funcs;
|
|
|
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if (!new_crtc_state->enable)
|
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continue;
|
|
|
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if (!new_crtc_state->mode_changed &&
|
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!new_crtc_state->connectors_changed)
|
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continue;
|
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|
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funcs = crtc->helper_private;
|
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if (!funcs || !funcs->mode_fixup)
|
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continue;
|
|
|
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ret = funcs->mode_fixup(crtc, &new_crtc_state->mode,
|
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&new_crtc_state->adjusted_mode);
|
|
if (!ret) {
|
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DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n",
|
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crtc->base.id, crtc->name);
|
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return -EINVAL;
|
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}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum drm_mode_status mode_valid_path(struct drm_connector *connector,
|
|
struct drm_encoder *encoder,
|
|
struct drm_crtc *crtc,
|
|
const struct drm_display_mode *mode)
|
|
{
|
|
struct drm_bridge *bridge;
|
|
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;
|
|
}
|
|
|
|
bridge = drm_bridge_chain_get_first_bridge(encoder);
|
|
ret = drm_bridge_chain_mode_valid(bridge, &connector->display_info,
|
|
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;
|
|
const 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 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.
|
|
* &drm_crtc_state.no_vblank is set from the result of drm_dev_has_vblank().
|
|
* 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 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;
|
|
}
|
|
|
|
if (drm_dev_has_vblank(dev))
|
|
new_crtc_state->no_vblank = false;
|
|
else
|
|
new_crtc_state->no_vblank = true;
|
|
}
|
|
|
|
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, 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 whose CRTC changes its
|
|
* 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, state);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Iterate over all connectors again, and add all affected bridges to
|
|
* the state.
|
|
*/
|
|
for_each_oldnew_connector_in_state(state, connector,
|
|
old_connector_state,
|
|
new_connector_state, i) {
|
|
struct drm_encoder *encoder;
|
|
|
|
encoder = old_connector_state->best_encoder;
|
|
ret = drm_atomic_add_encoder_bridges(state, encoder);
|
|
if (ret)
|
|
return ret;
|
|
|
|
encoder = new_connector_state->best_encoder;
|
|
ret = drm_atomic_add_encoder_bridges(state, encoder);
|
|
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, 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, 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);
|
|
|
|
drm_self_refresh_helper_alter_state(state);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_check);
|
|
|
|
static bool
|
|
crtc_needs_disable(struct drm_crtc_state *old_state,
|
|
struct drm_crtc_state *new_state)
|
|
{
|
|
/*
|
|
* No new_state means the CRTC is off, so the only criteria is whether
|
|
* it's currently active or in self refresh mode.
|
|
*/
|
|
if (!new_state)
|
|
return drm_atomic_crtc_effectively_active(old_state);
|
|
|
|
/*
|
|
* We need to run through the crtc_funcs->disable() function if the CRTC
|
|
* is currently on, if it's transitioning to self refresh mode, or if
|
|
* it's in self refresh mode and needs to be fully disabled.
|
|
*/
|
|
return old_state->active ||
|
|
(old_state->self_refresh_active && !new_state->enable) ||
|
|
new_state->self_refresh_active;
|
|
}
|
|
|
|
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;
|
|
struct drm_bridge *bridge;
|
|
|
|
/* 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 (new_conn_state->crtc)
|
|
new_crtc_state = drm_atomic_get_new_crtc_state(
|
|
old_state,
|
|
new_conn_state->crtc);
|
|
else
|
|
new_crtc_state = NULL;
|
|
|
|
if (!crtc_needs_disable(old_crtc_state, new_crtc_state) ||
|
|
!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.
|
|
*/
|
|
bridge = drm_bridge_chain_get_first_bridge(encoder);
|
|
drm_atomic_bridge_chain_disable(bridge, old_state);
|
|
|
|
/* Right function depends upon target state. */
|
|
if (funcs) {
|
|
if (funcs->atomic_disable)
|
|
funcs->atomic_disable(encoder, old_state);
|
|
else 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_atomic_bridge_chain_post_disable(bridge, old_state);
|
|
}
|
|
|
|
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 (!crtc_needs_disable(old_crtc_state, new_crtc_state))
|
|
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_state);
|
|
else if (funcs->disable)
|
|
funcs->disable(crtc);
|
|
else if (funcs->dpms)
|
|
funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
|
|
|
|
if (!drm_dev_has_vblank(dev))
|
|
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.
|
|
*
|
|
* 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;
|
|
}
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state);
|
|
|
|
/**
|
|
* drm_atomic_helper_calc_timestamping_constants - update vblank timestamping constants
|
|
* @state: atomic state object
|
|
*
|
|
* Updates the timestamping constants used for precise vblank timestamps
|
|
* by calling drm_calc_timestamping_constants() for all enabled crtcs in @state.
|
|
*/
|
|
void drm_atomic_helper_calc_timestamping_constants(struct drm_atomic_state *state)
|
|
{
|
|
struct drm_crtc_state *new_crtc_state;
|
|
struct drm_crtc *crtc;
|
|
int i;
|
|
|
|
for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
|
|
if (new_crtc_state->enable)
|
|
drm_calc_timestamping_constants(crtc,
|
|
&new_crtc_state->adjusted_mode);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_calc_timestamping_constants);
|
|
|
|
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;
|
|
struct drm_bridge *bridge;
|
|
|
|
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);
|
|
}
|
|
|
|
bridge = drm_bridge_chain_get_first_bridge(encoder);
|
|
drm_bridge_chain_mode_set(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);
|
|
drm_atomic_helper_calc_timestamping_constants(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, old_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_state);
|
|
else if (funcs->commit)
|
|
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;
|
|
struct drm_bridge *bridge;
|
|
|
|
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.
|
|
*/
|
|
bridge = drm_bridge_chain_get_first_bridge(encoder);
|
|
drm_atomic_bridge_chain_pre_enable(bridge, old_state);
|
|
|
|
if (funcs) {
|
|
if (funcs->atomic_enable)
|
|
funcs->atomic_enable(encoder, old_state);
|
|
else if (funcs->enable)
|
|
funcs->enable(encoder);
|
|
else if (funcs->commit)
|
|
funcs->commit(encoder);
|
|
}
|
|
|
|
drm_atomic_bridge_chain_enable(bridge, old_state);
|
|
}
|
|
|
|
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 affected
|
|
* 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(100));
|
|
|
|
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 affected
|
|
* 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 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;
|
|
struct drm_crtc_state *new_crtc_state;
|
|
struct drm_crtc *crtc;
|
|
ktime_t start;
|
|
s64 commit_time_ms;
|
|
unsigned int i, new_self_refresh_mask = 0;
|
|
|
|
funcs = dev->mode_config.helper_private;
|
|
|
|
/*
|
|
* We're measuring the _entire_ commit, so the time will vary depending
|
|
* on how many fences and objects are involved. For the purposes of self
|
|
* refresh, this is desirable since it'll give us an idea of how
|
|
* congested things are. This will inform our decision on how often we
|
|
* should enter self refresh after idle.
|
|
*
|
|
* These times will be averaged out in the self refresh helpers to avoid
|
|
* overreacting over one outlier frame
|
|
*/
|
|
start = ktime_get();
|
|
|
|
drm_atomic_helper_wait_for_fences(dev, old_state, false);
|
|
|
|
drm_atomic_helper_wait_for_dependencies(old_state);
|
|
|
|
/*
|
|
* We cannot safely access new_crtc_state after
|
|
* drm_atomic_helper_commit_hw_done() so figure out which crtc's have
|
|
* self-refresh active beforehand:
|
|
*/
|
|
for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i)
|
|
if (new_crtc_state->self_refresh_active)
|
|
new_self_refresh_mask |= BIT(i);
|
|
|
|
if (funcs && funcs->atomic_commit_tail)
|
|
funcs->atomic_commit_tail(old_state);
|
|
else
|
|
drm_atomic_helper_commit_tail(old_state);
|
|
|
|
commit_time_ms = ktime_ms_delta(ktime_get(), start);
|
|
if (commit_time_ms > 0)
|
|
drm_self_refresh_helper_update_avg_times(old_state,
|
|
(unsigned long)commit_time_ms,
|
|
new_self_refresh_mask);
|
|
|
|
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;
|
|
|
|
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)) {
|
|
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] inflight previous commit preventing async commit\n",
|
|
plane->base.id, plane->name);
|
|
return -EBUSY;
|
|
}
|
|
|
|
return funcs->atomic_async_check(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.
|
|
*
|
|
* TODO: Implement full swap instead of doing in-place changes.
|
|
*/
|
|
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) {
|
|
struct drm_framebuffer *new_fb = plane_state->fb;
|
|
struct drm_framebuffer *old_fb = plane->state->fb;
|
|
|
|
funcs = plane->helper_private;
|
|
funcs->atomic_async_update(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 != new_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);
|
|
|
|
/*
|
|
* Make sure the FBs have been swapped so that cleanups in the
|
|
* new_state performs a cleanup in the old FB.
|
|
*/
|
|
WARN_ON_ONCE(plane_state->fb != old_fb);
|
|
}
|
|
}
|
|
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 its 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 artificially 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 should use struct &drm_crtc_commit to sequence
|
|
* different operations against each another. Locks, especially struct
|
|
* &drm_modeset_lock, should not be held in worker threads or any other
|
|
* asynchronous context used to commit the hardware state.
|
|
*
|
|
* drm_atomic_helper_commit() implements the recommended sequence for
|
|
* nonblocking commits, using drm_atomic_helper_setup_commit() internally:
|
|
*
|
|
* 1. Run drm_atomic_helper_prepare_planes(). Since this can fail and we
|
|
* need to propagate out of memory/VRAM errors to userspace, it must be called
|
|
* synchronously.
|
|
*
|
|
* 2. Synchronize with any outstanding nonblocking commit worker threads which
|
|
* might be affected by the new state update. This is handled by
|
|
* drm_atomic_helper_setup_commit().
|
|
*
|
|
* Asynchronous workers need to have sufficient parallelism to be able to run
|
|
* different atomic commits on different CRTCs in parallel. The simplest way to
|
|
* achieve 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.
|
|
*
|
|
* IMPORTANT: A &drm_atomic_state update for multiple CRTCs is sequenced
|
|
* against all CRTCs therein. Therefore for atomic state updates which only flip
|
|
* planes the driver must not get the struct &drm_crtc_state of unrelated CRTCs
|
|
* in its atomic check code: This would prevent committing of atomic updates to
|
|
* multiple CRTCs in parallel. In general, adding additional state structures
|
|
* should be avoided as much as possible, because this reduces parallelism in
|
|
* (nonblocking) commits, both due to locking and due to commit sequencing
|
|
* requirements.
|
|
*
|
|
* 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. Note that commit
|
|
* workers do not hold any locks; their access is only coordinated through
|
|
* ordering. If workers would access state only through the pointers in the
|
|
* free-standing state objects (currently not the case for any driver) then even
|
|
* multiple pending commits could be in-flight at the same time.
|
|
*
|
|
* 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 scheduled work should synchronize against other workers
|
|
* using the &drm_crtc_commit infrastructure as needed. See
|
|
* drm_atomic_helper_setup_commit() for more details.
|
|
*/
|
|
|
|
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);
|
|
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] busy with a previous commit\n",
|
|
crtc->base.id, crtc->name);
|
|
|
|
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.
|
|
*
|
|
* Drivers that need to extend the commit setup to private objects can use the
|
|
* &drm_mode_config_helper_funcs.atomic_commit_setup 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 its 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;
|
|
const struct drm_mode_config_helper_funcs *funcs;
|
|
int i, ret;
|
|
|
|
funcs = state->dev->mode_config.helper_private;
|
|
|
|
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)) {
|
|
DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] busy with a previous commit\n",
|
|
conn->base.id, conn->name);
|
|
|
|
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)) {
|
|
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] busy with a previous commit\n",
|
|
plane->base.id, plane->name);
|
|
|
|
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);
|
|
}
|
|
|
|
if (funcs && funcs->atomic_commit_setup)
|
|
return funcs->atomic_commit_setup(state);
|
|
|
|
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;
|
|
int i;
|
|
long ret;
|
|
|
|
for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) {
|
|
ret = drm_crtc_commit_wait(old_crtc_state->commit);
|
|
if (ret)
|
|
DRM_ERROR("[CRTC:%d:%s] commit wait timed out\n",
|
|
crtc->base.id, crtc->name);
|
|
}
|
|
|
|
for_each_old_connector_in_state(old_state, conn, old_conn_state, i) {
|
|
ret = drm_crtc_commit_wait(old_conn_state->commit);
|
|
if (ret)
|
|
DRM_ERROR("[CONNECTOR:%d:%s] commit wait timed out\n",
|
|
conn->base.id, conn->name);
|
|
}
|
|
|
|
for_each_old_plane_in_state(old_state, plane, old_plane_state, i) {
|
|
ret = drm_crtc_commit_wait(old_plane_state->commit);
|
|
if (ret)
|
|
DRM_ERROR("[PLANE:%d:%s] commit wait 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 fakes 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(). In addition to writeback
|
|
* connectors, this function can also fake VBLANK events for CRTCs without
|
|
* VBLANK interrupt.
|
|
*
|
|
* 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_connector *connector;
|
|
struct drm_connector_state *new_conn_state;
|
|
struct drm_plane *plane;
|
|
struct drm_plane_state *new_plane_state;
|
|
int ret, i, j;
|
|
|
|
for_each_new_connector_in_state(state, connector, new_conn_state, i) {
|
|
if (!new_conn_state->writeback_job)
|
|
continue;
|
|
|
|
ret = drm_writeback_prepare_job(new_conn_state->writeback_job);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
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_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_state);
|
|
} else if (new_plane_state->crtc || disabling) {
|
|
funcs->atomic_update(plane, old_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_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_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_state);
|
|
else if (new_plane_state->crtc ||
|
|
drm_atomic_plane_disabling(old_plane_state, new_plane_state))
|
|
plane_funcs->atomic_update(plane, old_state);
|
|
}
|
|
|
|
if (crtc_funcs && crtc_funcs->atomic_flush)
|
|
crtc_funcs->atomic_flush(crtc, old_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);
|
|
|
|
/**
|
|
* 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)
|
|
goto fail;
|
|
|
|
ret = drm_atomic_commit(state);
|
|
|
|
fail:
|
|
drm_atomic_state_put(state);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_set_config);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
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;
|
|
}
|
|
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);
|
|
if (ret)
|
|
DRM_ERROR("Disabling all crtc's during unload failed with %i\n", ret);
|
|
|
|
DRM_MODESET_LOCK_ALL_END(dev, 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;
|
|
state->duplicated = true;
|
|
|
|
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(dev, 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(dev, 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->async_flip = flags & DRM_MODE_PAGE_FLIP_ASYNC;
|
|
|
|
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_bridge_propagate_bus_fmt() - Propagate output format to
|
|
* the input end of a bridge
|
|
* @bridge: bridge control structure
|
|
* @bridge_state: new bridge state
|
|
* @crtc_state: new CRTC state
|
|
* @conn_state: new connector state
|
|
* @output_fmt: tested output bus format
|
|
* @num_input_fmts: will contain the size of the returned array
|
|
*
|
|
* This helper is a pluggable implementation of the
|
|
* &drm_bridge_funcs.atomic_get_input_bus_fmts operation for bridges that don't
|
|
* modify the bus configuration between their input and their output. It
|
|
* returns an array of input formats with a single element set to @output_fmt.
|
|
*
|
|
* RETURNS:
|
|
* a valid format array of size @num_input_fmts, or NULL if the allocation
|
|
* failed
|
|
*/
|
|
u32 *
|
|
drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge,
|
|
struct drm_bridge_state *bridge_state,
|
|
struct drm_crtc_state *crtc_state,
|
|
struct drm_connector_state *conn_state,
|
|
u32 output_fmt,
|
|
unsigned int *num_input_fmts)
|
|
{
|
|
u32 *input_fmts;
|
|
|
|
input_fmts = kzalloc(sizeof(*input_fmts), GFP_KERNEL);
|
|
if (!input_fmts) {
|
|
*num_input_fmts = 0;
|
|
return NULL;
|
|
}
|
|
|
|
*num_input_fmts = 1;
|
|
input_fmts[0] = output_fmt;
|
|
return input_fmts;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_bridge_propagate_bus_fmt);
|