![Rob Clark](/assets/img/avatar_default.png)
Add functions to check core plane/crtc state. v2: comments, int-overflow checks, call from core rather than helpers to be sure drivers can't find a way to bypass core checks Signed-off-by: Rob Clark <robdclark@gmail.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2031 lines
53 KiB
C
2031 lines
53 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 <drm/drmP.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_plane_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include <linux/fence.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 expose
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* 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, drm_atomic_helper_disable_plane and the
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* various functions to implement set_property callbacks. New drivers must not
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* implement these functions themselves but must use the provided 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 *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 (plane->state->crtc) {
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crtc_state = state->crtc_states[drm_crtc_index(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 =
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state->crtc_states[drm_crtc_index(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 struct drm_crtc *
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get_current_crtc_for_encoder(struct drm_device *dev,
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struct drm_encoder *encoder)
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{
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struct drm_mode_config *config = &dev->mode_config;
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struct drm_connector *connector;
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WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
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list_for_each_entry(connector, &config->connector_list, head) {
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if (connector->state->best_encoder != encoder)
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continue;
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return connector->state->crtc;
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}
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return NULL;
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}
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static int
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steal_encoder(struct drm_atomic_state *state,
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struct drm_encoder *encoder,
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struct drm_crtc *encoder_crtc)
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{
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struct drm_mode_config *config = &state->dev->mode_config;
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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 *connector_state;
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int ret;
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/*
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* We can only steal an encoder coming from a connector, which means we
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* must already hold the connection_mutex.
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*/
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WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
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DRM_DEBUG_KMS("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n",
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encoder->base.id, encoder->name,
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encoder_crtc->base.id);
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crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc);
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if (IS_ERR(crtc_state))
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return PTR_ERR(crtc_state);
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crtc_state->mode_changed = true;
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list_for_each_entry(connector, &config->connector_list, head) {
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if (connector->state->best_encoder != encoder)
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continue;
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DRM_DEBUG_KMS("Stealing encoder from [CONNECTOR:%d:%s]\n",
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connector->base.id,
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connector->name);
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connector_state = drm_atomic_get_connector_state(state,
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connector);
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if (IS_ERR(connector_state))
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return PTR_ERR(connector_state);
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ret = drm_atomic_set_crtc_for_connector(connector_state, NULL);
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if (ret)
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return ret;
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connector_state->best_encoder = NULL;
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}
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return 0;
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}
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static int
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update_connector_routing(struct drm_atomic_state *state, int conn_idx)
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{
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struct drm_connector_helper_funcs *funcs;
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struct drm_encoder *new_encoder;
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struct drm_crtc *encoder_crtc;
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struct drm_connector *connector;
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struct drm_connector_state *connector_state;
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struct drm_crtc_state *crtc_state;
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int idx, ret;
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connector = state->connectors[conn_idx];
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connector_state = state->connector_states[conn_idx];
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if (!connector)
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return 0;
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DRM_DEBUG_KMS("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 (connector->state->crtc != connector_state->crtc) {
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if (connector->state->crtc) {
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idx = drm_crtc_index(connector->state->crtc);
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crtc_state = state->crtc_states[idx];
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crtc_state->mode_changed = true;
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}
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if (connector_state->crtc) {
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idx = drm_crtc_index(connector_state->crtc);
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crtc_state = state->crtc_states[idx];
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crtc_state->mode_changed = true;
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}
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}
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if (!connector_state->crtc) {
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DRM_DEBUG_KMS("Disabling [CONNECTOR:%d:%s]\n",
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connector->base.id,
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connector->name);
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connector_state->best_encoder = NULL;
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return 0;
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}
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funcs = connector->helper_private;
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new_encoder = funcs->best_encoder(connector);
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if (!new_encoder) {
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DRM_DEBUG_KMS("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 (new_encoder == connector_state->best_encoder) {
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DRM_DEBUG_KMS("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\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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connector_state->crtc->base.id);
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return 0;
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}
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encoder_crtc = get_current_crtc_for_encoder(state->dev,
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new_encoder);
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if (encoder_crtc) {
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ret = steal_encoder(state, new_encoder, encoder_crtc);
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if (ret) {
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DRM_DEBUG_KMS("Encoder stealing failed for [CONNECTOR:%d:%s]\n",
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connector->base.id,
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connector->name);
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return ret;
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}
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}
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connector_state->best_encoder = new_encoder;
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idx = drm_crtc_index(connector_state->crtc);
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crtc_state = state->crtc_states[idx];
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crtc_state->mode_changed = true;
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DRM_DEBUG_KMS("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\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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connector_state->crtc->base.id);
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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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int ncrtcs = state->dev->mode_config.num_crtc;
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struct drm_crtc_state *crtc_state;
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struct drm_connector_state *conn_state;
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int i;
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bool ret;
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for (i = 0; i < ncrtcs; i++) {
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crtc_state = state->crtc_states[i];
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if (!crtc_state || !crtc_state->mode_changed)
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continue;
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drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode);
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}
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for (i = 0; i < state->num_connector; i++) {
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struct drm_encoder_helper_funcs *funcs;
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struct drm_encoder *encoder;
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conn_state = state->connector_states[i];
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if (!conn_state)
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continue;
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WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc);
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if (!conn_state->crtc || !conn_state->best_encoder)
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continue;
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crtc_state =
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state->crtc_states[drm_crtc_index(conn_state->crtc)];
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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 = conn_state->best_encoder;
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funcs = encoder->helper_private;
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if (encoder->bridge && encoder->bridge->funcs->mode_fixup) {
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ret = encoder->bridge->funcs->mode_fixup(
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encoder->bridge, &crtc_state->mode,
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&crtc_state->adjusted_mode);
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if (!ret) {
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DRM_DEBUG_KMS("Bridge fixup failed\n");
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return -EINVAL;
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}
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}
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ret = funcs->mode_fixup(encoder, &crtc_state->mode,
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&crtc_state->adjusted_mode);
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if (!ret) {
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DRM_DEBUG_KMS("[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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for (i = 0; i < ncrtcs; i++) {
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struct drm_crtc_helper_funcs *funcs;
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struct drm_crtc *crtc;
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crtc_state = state->crtc_states[i];
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crtc = state->crtcs[i];
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if (!crtc_state || !crtc_state->mode_changed)
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continue;
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funcs = crtc->helper_private;
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ret = funcs->mode_fixup(crtc, &crtc_state->mode,
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&crtc_state->adjusted_mode);
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if (!ret) {
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DRM_DEBUG_KMS("[CRTC:%d] fixup failed\n",
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crtc->base.id);
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return -EINVAL;
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}
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}
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return 0;
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}
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/**
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* drm_atomic_helper_check - validate state object for modeset changes
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* @dev: DRM device
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* @state: the driver state object
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*
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* Check the state object to see if the requested state is physically possible.
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* This does all the crtc and connector related computations for an atomic
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* update. It computes and updates crtc_state->mode_changed, adds any additional
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* connectors needed for full modesets and calls down into ->mode_fixup
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* functions of the driver backend.
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*
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* IMPORTANT:
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*
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* Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a
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* plane update can't be done without a full modeset) _must_ call this function
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* afterwards after that change. It is permitted to call this function multiple
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* times for the same update, e.g. when the ->atomic_check functions depend upon
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* the adjusted dotclock for fifo space allocation and watermark computation.
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*
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* RETURNS
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* Zero for success or -errno
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*/
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int
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drm_atomic_helper_check_modeset(struct drm_device *dev,
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struct drm_atomic_state *state)
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{
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int ncrtcs = dev->mode_config.num_crtc;
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struct drm_crtc *crtc;
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struct drm_crtc_state *crtc_state;
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int i, ret;
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for (i = 0; i < ncrtcs; i++) {
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crtc = state->crtcs[i];
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crtc_state = state->crtc_states[i];
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if (!crtc)
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continue;
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if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) {
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DRM_DEBUG_KMS("[CRTC:%d] mode changed\n",
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crtc->base.id);
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crtc_state->mode_changed = true;
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}
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if (crtc->state->enable != crtc_state->enable) {
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DRM_DEBUG_KMS("[CRTC:%d] enable changed\n",
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crtc->base.id);
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crtc_state->mode_changed = true;
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}
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}
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for (i = 0; i < state->num_connector; i++) {
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/*
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* This only sets crtc->mode_changed for routing changes,
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* drivers must set crtc->mode_changed themselves when connector
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* properties need to be updated.
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*/
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ret = update_connector_routing(state, i);
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if (ret)
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return ret;
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}
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/*
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* After all the routing has been prepared we need to add in any
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* connector which is itself unchanged, but who's crtc changes it's
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* configuration. This must be done before calling mode_fixup in case a
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* crtc only changed its mode but has the same set of connectors.
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*/
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for (i = 0; i < ncrtcs; i++) {
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int num_connectors;
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crtc = state->crtcs[i];
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crtc_state = state->crtc_states[i];
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if (!crtc || !crtc_state->mode_changed)
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continue;
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DRM_DEBUG_KMS("[CRTC:%d] needs full modeset, enable: %c\n",
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crtc->base.id,
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crtc_state->enable ? 'y' : 'n');
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ret = drm_atomic_add_affected_connectors(state, crtc);
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if (ret != 0)
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return ret;
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num_connectors = drm_atomic_connectors_for_crtc(state,
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crtc);
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if (crtc_state->enable != !!num_connectors) {
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DRM_DEBUG_KMS("[CRTC:%d] enabled/connectors mismatch\n",
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crtc->base.id);
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return -EINVAL;
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}
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}
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return mode_fixup(state);
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}
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EXPORT_SYMBOL(drm_atomic_helper_check_modeset);
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/**
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* drm_atomic_helper_check - validate state object for modeset changes
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* @dev: DRM device
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* @state: the driver state object
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*
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* Check the state object to see if the requested state is physically possible.
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* This does all the plane update related checks using by calling into the
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* ->atomic_check hooks provided by the driver.
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*
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* RETURNS
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* Zero for success or -errno
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*/
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int
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drm_atomic_helper_check_planes(struct drm_device *dev,
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struct drm_atomic_state *state)
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{
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int nplanes = dev->mode_config.num_total_plane;
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int ncrtcs = dev->mode_config.num_crtc;
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int i, ret = 0;
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for (i = 0; i < nplanes; i++) {
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struct drm_plane_helper_funcs *funcs;
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struct drm_plane *plane = state->planes[i];
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struct drm_plane_state *plane_state = state->plane_states[i];
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if (!plane)
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continue;
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funcs = plane->helper_private;
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drm_atomic_helper_plane_changed(state, plane_state, plane);
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if (!funcs || !funcs->atomic_check)
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continue;
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ret = funcs->atomic_check(plane, plane_state);
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if (ret) {
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DRM_DEBUG_KMS("[PLANE:%d] atomic driver check failed\n",
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plane->base.id);
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return ret;
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}
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}
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for (i = 0; i < ncrtcs; i++) {
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struct drm_crtc_helper_funcs *funcs;
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struct drm_crtc *crtc = state->crtcs[i];
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if (!crtc)
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continue;
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funcs = crtc->helper_private;
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if (!funcs || !funcs->atomic_check)
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continue;
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ret = funcs->atomic_check(crtc, state->crtc_states[i]);
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if (ret) {
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DRM_DEBUG_KMS("[CRTC:%d] atomic driver check failed\n",
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crtc->base.id);
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return ret;
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}
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}
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return ret;
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}
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EXPORT_SYMBOL(drm_atomic_helper_check_planes);
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/**
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* drm_atomic_helper_check - validate state object
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* @dev: DRM device
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* @state: the driver state object
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*
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* Check the state object to see if the requested state is physically possible.
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* Only crtcs and planes have check callbacks, so for any additional (global)
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* checking that a driver needs it can simply wrap that around this function.
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* Drivers without such needs can directly use this as their ->atomic_check()
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* callback.
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*
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* This just wraps the two parts of the state checking for planes and modeset
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* state in the default order: First it calls drm_atomic_helper_check_modeset()
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* and then drm_atomic_helper_check_planes(). The assumption is that the
|
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* ->atomic_check functions depend upon an updated adjusted_mode.clock to
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* e.g. properly compute watermarks.
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*
|
|
* 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;
|
|
|
|
ret = drm_atomic_helper_check_planes(dev, state);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_check);
|
|
|
|
static void
|
|
disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
{
|
|
int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
int i;
|
|
|
|
for (i = 0; i < old_state->num_connector; i++) {
|
|
struct drm_connector_state *old_conn_state;
|
|
struct drm_connector *connector;
|
|
struct drm_encoder_helper_funcs *funcs;
|
|
struct drm_encoder *encoder;
|
|
|
|
old_conn_state = old_state->connector_states[i];
|
|
connector = old_state->connectors[i];
|
|
|
|
/* Shut down everything that's in the changeset and currently
|
|
* still on. So need to check the old, saved state. */
|
|
if (!old_conn_state || !old_conn_state->crtc)
|
|
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;
|
|
|
|
/*
|
|
* Each encoder has at most one connector (since we always steal
|
|
* it away), so we won't call call disable hooks twice.
|
|
*/
|
|
if (encoder->bridge)
|
|
encoder->bridge->funcs->disable(encoder->bridge);
|
|
|
|
/* Right function depends upon target state. */
|
|
if (connector->state->crtc)
|
|
funcs->prepare(encoder);
|
|
else if (funcs->disable)
|
|
funcs->disable(encoder);
|
|
else
|
|
funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
|
|
|
|
if (encoder->bridge)
|
|
encoder->bridge->funcs->post_disable(encoder->bridge);
|
|
}
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
struct drm_crtc *crtc;
|
|
|
|
crtc = old_state->crtcs[i];
|
|
|
|
/* Shut down everything that needs a full modeset. */
|
|
if (!crtc || !crtc->state->mode_changed)
|
|
continue;
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
/* Right function depends upon target state. */
|
|
if (crtc->state->enable)
|
|
funcs->prepare(crtc);
|
|
else if (funcs->disable)
|
|
funcs->disable(crtc);
|
|
else
|
|
funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
|
|
}
|
|
}
|
|
|
|
static void
|
|
set_routing_links(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
{
|
|
int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
int i;
|
|
|
|
/* clear out existing links */
|
|
for (i = 0; i < old_state->num_connector; i++) {
|
|
struct drm_connector *connector;
|
|
|
|
connector = old_state->connectors[i];
|
|
|
|
if (!connector || !connector->encoder)
|
|
continue;
|
|
|
|
WARN_ON(!connector->encoder->crtc);
|
|
|
|
connector->encoder->crtc = NULL;
|
|
connector->encoder = NULL;
|
|
}
|
|
|
|
/* set new links */
|
|
for (i = 0; i < old_state->num_connector; i++) {
|
|
struct drm_connector *connector;
|
|
|
|
connector = old_state->connectors[i];
|
|
|
|
if (!connector || !connector->state->crtc)
|
|
continue;
|
|
|
|
if (WARN_ON(!connector->state->best_encoder))
|
|
continue;
|
|
|
|
connector->encoder = connector->state->best_encoder;
|
|
connector->encoder->crtc = connector->state->crtc;
|
|
}
|
|
|
|
/* set legacy state in the crtc structure */
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
struct drm_crtc *crtc;
|
|
|
|
crtc = old_state->crtcs[i];
|
|
|
|
if (!crtc)
|
|
continue;
|
|
|
|
crtc->mode = crtc->state->mode;
|
|
crtc->enabled = crtc->state->enable;
|
|
crtc->x = crtc->primary->state->src_x >> 16;
|
|
crtc->y = crtc->primary->state->src_y >> 16;
|
|
}
|
|
}
|
|
|
|
static void
|
|
crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
{
|
|
int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
int i;
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
struct drm_crtc *crtc;
|
|
|
|
crtc = old_state->crtcs[i];
|
|
|
|
if (!crtc || !crtc->state->mode_changed)
|
|
continue;
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
if (crtc->state->enable)
|
|
funcs->mode_set_nofb(crtc);
|
|
}
|
|
|
|
for (i = 0; i < old_state->num_connector; i++) {
|
|
struct drm_connector *connector;
|
|
struct drm_crtc_state *new_crtc_state;
|
|
struct drm_encoder_helper_funcs *funcs;
|
|
struct drm_encoder *encoder;
|
|
struct drm_display_mode *mode, *adjusted_mode;
|
|
|
|
connector = old_state->connectors[i];
|
|
|
|
if (!connector || !connector->state->best_encoder)
|
|
continue;
|
|
|
|
encoder = connector->state->best_encoder;
|
|
funcs = encoder->helper_private;
|
|
new_crtc_state = connector->state->crtc->state;
|
|
mode = &new_crtc_state->mode;
|
|
adjusted_mode = &new_crtc_state->adjusted_mode;
|
|
|
|
/*
|
|
* Each encoder has at most one connector (since we always steal
|
|
* it away), so we won't call call mode_set hooks twice.
|
|
*/
|
|
funcs->mode_set(encoder, mode, adjusted_mode);
|
|
|
|
if (encoder->bridge && encoder->bridge->funcs->mode_set)
|
|
encoder->bridge->funcs->mode_set(encoder->bridge,
|
|
mode, adjusted_mode);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_helper_commit_pre_planes - modeset commit before plane updates
|
|
* @dev: DRM device
|
|
* @state: atomic state
|
|
*
|
|
* This function commits the modeset changes that need to be committed before
|
|
* updating planes. It shuts down all the outputs that need to be shut down and
|
|
* prepares them (if required) with the new mode.
|
|
*/
|
|
void drm_atomic_helper_commit_pre_planes(struct drm_device *dev,
|
|
struct drm_atomic_state *state)
|
|
{
|
|
disable_outputs(dev, state);
|
|
set_routing_links(dev, state);
|
|
crtc_set_mode(dev, state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit_pre_planes);
|
|
|
|
/**
|
|
* drm_atomic_helper_commit_post_planes - modeset commit after plane updates
|
|
* @dev: DRM device
|
|
* @old_state: atomic state object with old state structures
|
|
*
|
|
* This function commits the modeset changes that need to be committed after
|
|
* updating planes: It enables all the outputs with the new configuration which
|
|
* had to be turned off for the update.
|
|
*/
|
|
void drm_atomic_helper_commit_post_planes(struct drm_device *dev,
|
|
struct drm_atomic_state *old_state)
|
|
{
|
|
int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
int i;
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
struct drm_crtc *crtc;
|
|
|
|
crtc = old_state->crtcs[i];
|
|
|
|
/* Need to filter out CRTCs where only planes change. */
|
|
if (!crtc || !crtc->state->mode_changed)
|
|
continue;
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
if (crtc->state->enable)
|
|
funcs->commit(crtc);
|
|
}
|
|
|
|
for (i = 0; i < old_state->num_connector; i++) {
|
|
struct drm_connector *connector;
|
|
struct drm_encoder_helper_funcs *funcs;
|
|
struct drm_encoder *encoder;
|
|
|
|
connector = old_state->connectors[i];
|
|
|
|
if (!connector || !connector->state->best_encoder)
|
|
continue;
|
|
|
|
encoder = connector->state->best_encoder;
|
|
funcs = encoder->helper_private;
|
|
|
|
/*
|
|
* Each encoder has at most one connector (since we always steal
|
|
* it away), so we won't call call enable hooks twice.
|
|
*/
|
|
if (encoder->bridge)
|
|
encoder->bridge->funcs->pre_enable(encoder->bridge);
|
|
|
|
funcs->commit(encoder);
|
|
|
|
if (encoder->bridge)
|
|
encoder->bridge->funcs->enable(encoder->bridge);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit_post_planes);
|
|
|
|
static void wait_for_fences(struct drm_device *dev,
|
|
struct drm_atomic_state *state)
|
|
{
|
|
int nplanes = dev->mode_config.num_total_plane;
|
|
int i;
|
|
|
|
for (i = 0; i < nplanes; i++) {
|
|
struct drm_plane *plane = state->planes[i];
|
|
|
|
if (!plane || !plane->state->fence)
|
|
continue;
|
|
|
|
WARN_ON(!plane->state->fb);
|
|
|
|
fence_wait(plane->state->fence, false);
|
|
fence_put(plane->state->fence);
|
|
plane->state->fence = NULL;
|
|
}
|
|
}
|
|
|
|
static bool framebuffer_changed(struct drm_device *dev,
|
|
struct drm_atomic_state *old_state,
|
|
struct drm_crtc *crtc)
|
|
{
|
|
struct drm_plane *plane;
|
|
struct drm_plane_state *old_plane_state;
|
|
int nplanes = old_state->dev->mode_config.num_total_plane;
|
|
int i;
|
|
|
|
for (i = 0; i < nplanes; i++) {
|
|
plane = old_state->planes[i];
|
|
old_plane_state = old_state->plane_states[i];
|
|
|
|
if (!plane)
|
|
continue;
|
|
|
|
if (plane->state->crtc != crtc &&
|
|
old_plane_state->crtc != crtc)
|
|
continue;
|
|
|
|
if (plane->state->fb != old_plane_state->fb)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs
|
|
* @dev: DRM device
|
|
* @old_state: atomic state object with old state structures
|
|
*
|
|
* Helper to, after atomic commit, wait for vblanks on all effected
|
|
* crtcs (ie. before cleaning up old framebuffers using
|
|
* drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the
|
|
* framebuffers have actually changed to optimize for the legacy cursor and
|
|
* plane update use-case.
|
|
*/
|
|
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;
|
|
int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
int i, ret;
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
crtc = old_state->crtcs[i];
|
|
old_crtc_state = old_state->crtc_states[i];
|
|
|
|
if (!crtc)
|
|
continue;
|
|
|
|
/* No one cares about the old state, so abuse it for tracking
|
|
* and store whether we hold a vblank reference (and should do a
|
|
* vblank wait) in the ->enable boolean. */
|
|
old_crtc_state->enable = false;
|
|
|
|
if (!crtc->state->enable)
|
|
continue;
|
|
|
|
if (!framebuffer_changed(dev, old_state, crtc))
|
|
continue;
|
|
|
|
ret = drm_crtc_vblank_get(crtc);
|
|
if (ret != 0)
|
|
continue;
|
|
|
|
old_crtc_state->enable = true;
|
|
old_crtc_state->last_vblank_count = drm_vblank_count(dev, i);
|
|
}
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
crtc = old_state->crtcs[i];
|
|
old_crtc_state = old_state->crtc_states[i];
|
|
|
|
if (!crtc || !old_crtc_state->enable)
|
|
continue;
|
|
|
|
ret = wait_event_timeout(dev->vblank[i].queue,
|
|
old_crtc_state->last_vblank_count !=
|
|
drm_vblank_count(dev, i),
|
|
msecs_to_jiffies(50));
|
|
|
|
drm_crtc_vblank_put(crtc);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks);
|
|
|
|
/**
|
|
* drm_atomic_helper_commit - commit validated state object
|
|
* @dev: DRM device
|
|
* @state: the driver state object
|
|
* @async: asynchronous commit
|
|
*
|
|
* This function commits a with drm_atomic_helper_check() pre-validated state
|
|
* object. This can still fail when e.g. the framebuffer reservation fails. For
|
|
* now this doesn't implement asynchronous commits.
|
|
*
|
|
* RETURNS
|
|
* Zero for success or -errno.
|
|
*/
|
|
int drm_atomic_helper_commit(struct drm_device *dev,
|
|
struct drm_atomic_state *state,
|
|
bool async)
|
|
{
|
|
int ret;
|
|
|
|
if (async)
|
|
return -EBUSY;
|
|
|
|
ret = drm_atomic_helper_prepare_planes(dev, state);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
drm_atomic_helper_swap_state(dev, state);
|
|
|
|
/*
|
|
* Everything below can be run asynchronously without the need to grab
|
|
* any modeset locks at all under one conditions: 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.
|
|
*/
|
|
|
|
wait_for_fences(dev, state);
|
|
|
|
drm_atomic_helper_commit_pre_planes(dev, state);
|
|
|
|
drm_atomic_helper_commit_planes(dev, state);
|
|
|
|
drm_atomic_helper_commit_post_planes(dev, state);
|
|
|
|
drm_atomic_helper_wait_for_vblanks(dev, state);
|
|
|
|
drm_atomic_helper_cleanup_planes(dev, state);
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit);
|
|
|
|
/**
|
|
* DOC: implementing async commit
|
|
*
|
|
* For now the atomic helpers don't support async commit directly. If there is
|
|
* real need it could be added though, using the dma-buf fence infrastructure
|
|
* for generic synchronization with outstanding rendering.
|
|
*
|
|
* For now drivers have to implement async commit themselves, with the following
|
|
* sequence being the recommended one:
|
|
*
|
|
* 1. Run drm_atomic_helper_prepare_planes() first. This is the only function
|
|
* which commit needs to call which can fail, so we want to run it first and
|
|
* synchronously.
|
|
*
|
|
* 2. Synchronize with any outstanding asynchronous commit worker threads which
|
|
* might be affected the new state update. This can be done by either cancelling
|
|
* or flushing the work items, depending upon whether the driver can deal with
|
|
* cancelled updates. Note that it is important to ensure that the framebuffer
|
|
* cleanup is still done when cancelling.
|
|
*
|
|
* For sufficient parallelism it is recommended to have a work item per crtc
|
|
* (for updates which don't touch global state) and a global one. Then we only
|
|
* need to synchronize with the crtc work items for changed crtcs and the global
|
|
* work item, which allows nice concurrent updates on disjoint sets of crtcs.
|
|
*
|
|
* 3. The software state is updated synchronously with
|
|
* drm_atomic_helper_swap_state. Doing this under the protection of all modeset
|
|
* locks means concurrent callers never see inconsistent state. And doing this
|
|
* while it's guaranteed that no relevant async worker runs means that async
|
|
* workers do not need grab any locks. Actually they must not grab locks, for
|
|
* otherwise the work flushing will deadlock.
|
|
*
|
|
* 4. Schedule a work item to do all subsequent steps, using the split-out
|
|
* commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and
|
|
* then cleaning up the framebuffers after the old framebuffer is no longer
|
|
* being displayed.
|
|
*/
|
|
|
|
/**
|
|
* drm_atomic_helper_prepare_planes - prepare plane resources after commit
|
|
* @dev: DRM device
|
|
* @state: atomic state object with old state structures
|
|
*
|
|
* This function prepares plane state, specifically framebuffers, for the new
|
|
* configuration. If any failure is encountered this function will call
|
|
* ->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)
|
|
{
|
|
int nplanes = dev->mode_config.num_total_plane;
|
|
int ret, i;
|
|
|
|
for (i = 0; i < nplanes; i++) {
|
|
struct drm_plane_helper_funcs *funcs;
|
|
struct drm_plane *plane = state->planes[i];
|
|
struct drm_framebuffer *fb;
|
|
|
|
if (!plane)
|
|
continue;
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
fb = state->plane_states[i]->fb;
|
|
|
|
if (fb && funcs->prepare_fb) {
|
|
ret = funcs->prepare_fb(plane, fb);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
for (i--; i >= 0; i--) {
|
|
struct drm_plane_helper_funcs *funcs;
|
|
struct drm_plane *plane = state->planes[i];
|
|
struct drm_framebuffer *fb;
|
|
|
|
if (!plane)
|
|
continue;
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
fb = state->plane_states[i]->fb;
|
|
|
|
if (fb && funcs->cleanup_fb)
|
|
funcs->cleanup_fb(plane, fb);
|
|
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_prepare_planes);
|
|
|
|
/**
|
|
* drm_atomic_helper_commit_planes - commit plane state
|
|
* @dev: DRM device
|
|
* @old_state: atomic state object with old state structures
|
|
*
|
|
* 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.
|
|
*/
|
|
void drm_atomic_helper_commit_planes(struct drm_device *dev,
|
|
struct drm_atomic_state *old_state)
|
|
{
|
|
int nplanes = dev->mode_config.num_total_plane;
|
|
int ncrtcs = dev->mode_config.num_crtc;
|
|
int i;
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
struct drm_crtc *crtc = old_state->crtcs[i];
|
|
|
|
if (!crtc)
|
|
continue;
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
if (!funcs || !funcs->atomic_begin)
|
|
continue;
|
|
|
|
funcs->atomic_begin(crtc);
|
|
}
|
|
|
|
for (i = 0; i < nplanes; i++) {
|
|
struct drm_plane_helper_funcs *funcs;
|
|
struct drm_plane *plane = old_state->planes[i];
|
|
struct drm_plane_state *old_plane_state;
|
|
|
|
if (!plane)
|
|
continue;
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
if (!funcs || !funcs->atomic_update)
|
|
continue;
|
|
|
|
old_plane_state = old_state->plane_states[i];
|
|
|
|
funcs->atomic_update(plane, old_plane_state);
|
|
}
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
struct drm_crtc *crtc = old_state->crtcs[i];
|
|
|
|
if (!crtc)
|
|
continue;
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
if (!funcs || !funcs->atomic_flush)
|
|
continue;
|
|
|
|
funcs->atomic_flush(crtc);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit_planes);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
int nplanes = dev->mode_config.num_total_plane;
|
|
int i;
|
|
|
|
for (i = 0; i < nplanes; i++) {
|
|
struct drm_plane_helper_funcs *funcs;
|
|
struct drm_plane *plane = old_state->planes[i];
|
|
struct drm_framebuffer *old_fb;
|
|
|
|
if (!plane)
|
|
continue;
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
old_fb = old_state->plane_states[i]->fb;
|
|
|
|
if (old_fb && funcs->cleanup_fb)
|
|
funcs->cleanup_fb(plane, old_fb);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes);
|
|
|
|
/**
|
|
* drm_atomic_helper_swap_state - store atomic state into current sw state
|
|
* @dev: DRM device
|
|
* @state: atomic state
|
|
*
|
|
* 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 swaped 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.
|
|
*/
|
|
void drm_atomic_helper_swap_state(struct drm_device *dev,
|
|
struct drm_atomic_state *state)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < dev->mode_config.num_connector; i++) {
|
|
struct drm_connector *connector = state->connectors[i];
|
|
|
|
if (!connector)
|
|
continue;
|
|
|
|
connector->state->state = state;
|
|
swap(state->connector_states[i], connector->state);
|
|
connector->state->state = NULL;
|
|
}
|
|
|
|
for (i = 0; i < dev->mode_config.num_crtc; i++) {
|
|
struct drm_crtc *crtc = state->crtcs[i];
|
|
|
|
if (!crtc)
|
|
continue;
|
|
|
|
crtc->state->state = state;
|
|
swap(state->crtc_states[i], crtc->state);
|
|
crtc->state->state = NULL;
|
|
}
|
|
|
|
for (i = 0; i < dev->mode_config.num_total_plane; i++) {
|
|
struct drm_plane *plane = state->planes[i];
|
|
|
|
if (!plane)
|
|
continue;
|
|
|
|
plane->state->state = state;
|
|
swap(state->plane_states[i], plane->state);
|
|
plane->state->state = NULL;
|
|
}
|
|
}
|
|
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
|
|
*
|
|
* 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_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 = drm_modeset_legacy_acquire_ctx(crtc);
|
|
retry:
|
|
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_h = crtc_h;
|
|
plane_state->crtc_w = crtc_w;
|
|
plane_state->src_x = src_x;
|
|
plane_state->src_y = src_y;
|
|
plane_state->src_h = src_h;
|
|
plane_state->src_w = src_w;
|
|
|
|
ret = drm_atomic_commit(state);
|
|
if (ret != 0)
|
|
goto fail;
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
return 0;
|
|
fail:
|
|
if (ret == -EDEADLK)
|
|
goto backoff;
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
return ret;
|
|
backoff:
|
|
drm_atomic_state_clear(state);
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
/*
|
|
* Someone might have exchanged the framebuffer while we dropped locks
|
|
* in the backoff code. We need to fix up the fb refcount tracking the
|
|
* core does for us.
|
|
*/
|
|
plane->old_fb = plane->fb;
|
|
|
|
goto retry;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_update_plane);
|
|
|
|
/**
|
|
* drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic
|
|
* @plane: plane to disable
|
|
*
|
|
* 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_atomic_state *state;
|
|
struct drm_plane_state *plane_state;
|
|
int ret = 0;
|
|
|
|
/*
|
|
* FIXME: Without plane->crtc set we can't get at the implicit legacy
|
|
* acquire context. The real fix will be to wire the acquire ctx through
|
|
* everywhere we need it, but meanwhile prevent chaos by just skipping
|
|
* this noop. The critical case is the cursor ioctls which a) only grab
|
|
* crtc/cursor-plane locks (so we need the crtc to get at the right
|
|
* acquire context) and b) can try to disable the plane multiple times.
|
|
*/
|
|
if (!plane->crtc)
|
|
return 0;
|
|
|
|
state = drm_atomic_state_alloc(plane->dev);
|
|
if (!state)
|
|
return -ENOMEM;
|
|
|
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc);
|
|
retry:
|
|
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, NULL);
|
|
if (ret != 0)
|
|
goto fail;
|
|
drm_atomic_set_fb_for_plane(plane_state, NULL);
|
|
plane_state->crtc_x = 0;
|
|
plane_state->crtc_y = 0;
|
|
plane_state->crtc_h = 0;
|
|
plane_state->crtc_w = 0;
|
|
plane_state->src_x = 0;
|
|
plane_state->src_y = 0;
|
|
plane_state->src_h = 0;
|
|
plane_state->src_w = 0;
|
|
|
|
ret = drm_atomic_commit(state);
|
|
if (ret != 0)
|
|
goto fail;
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
return 0;
|
|
fail:
|
|
if (ret == -EDEADLK)
|
|
goto backoff;
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
return ret;
|
|
backoff:
|
|
drm_atomic_state_clear(state);
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
/*
|
|
* Someone might have exchanged the framebuffer while we dropped locks
|
|
* in the backoff code. We need to fix up the fb refcount tracking the
|
|
* core does for us.
|
|
*/
|
|
plane->old_fb = plane->fb;
|
|
|
|
goto retry;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_disable_plane);
|
|
|
|
static int update_output_state(struct drm_atomic_state *state,
|
|
struct drm_mode_set *set)
|
|
{
|
|
struct drm_device *dev = set->crtc->dev;
|
|
struct drm_connector_state *conn_state;
|
|
int ncrtcs = state->dev->mode_config.num_crtc;
|
|
int ret, i, j;
|
|
|
|
ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
|
|
state->acquire_ctx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* First grab all affected connector/crtc states. */
|
|
for (i = 0; i < set->num_connectors; i++) {
|
|
conn_state = drm_atomic_get_connector_state(state,
|
|
set->connectors[i]);
|
|
if (IS_ERR(conn_state))
|
|
return PTR_ERR(conn_state);
|
|
}
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
struct drm_crtc *crtc = state->crtcs[i];
|
|
|
|
if (!crtc)
|
|
continue;
|
|
|
|
ret = drm_atomic_add_affected_connectors(state, crtc);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
/* Then recompute connector->crtc links and crtc enabling state. */
|
|
for (i = 0; i < state->num_connector; i++) {
|
|
struct drm_connector *connector;
|
|
|
|
connector = state->connectors[i];
|
|
conn_state = state->connector_states[i];
|
|
|
|
if (!connector)
|
|
continue;
|
|
|
|
if (conn_state->crtc == set->crtc) {
|
|
ret = drm_atomic_set_crtc_for_connector(conn_state,
|
|
NULL);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
for (j = 0; j < set->num_connectors; j++) {
|
|
if (set->connectors[j] == connector) {
|
|
ret = drm_atomic_set_crtc_for_connector(conn_state,
|
|
set->crtc);
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
struct drm_crtc *crtc = state->crtcs[i];
|
|
struct drm_crtc_state *crtc_state = state->crtc_states[i];
|
|
|
|
if (!crtc)
|
|
continue;
|
|
|
|
/* Don't update ->enable for the CRTC in the set_config request,
|
|
* since a mismatch would indicate a bug in the upper layers.
|
|
* The actual modeset code later on will catch any
|
|
* inconsistencies here. */
|
|
if (crtc == set->crtc)
|
|
continue;
|
|
|
|
crtc_state->enable =
|
|
drm_atomic_connectors_for_crtc(state, crtc);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_helper_set_config - set a new config from userspace
|
|
* @set: mode set configuration
|
|
*
|
|
* Provides a default crtc set_config handler using the atomic driver interface.
|
|
*
|
|
* Returns:
|
|
* Returns 0 on success, negative errno numbers on failure.
|
|
*/
|
|
int drm_atomic_helper_set_config(struct drm_mode_set *set)
|
|
{
|
|
struct drm_atomic_state *state;
|
|
struct drm_crtc *crtc = set->crtc;
|
|
struct drm_crtc_state *crtc_state;
|
|
struct drm_plane_state *primary_state;
|
|
int ret = 0;
|
|
|
|
state = drm_atomic_state_alloc(crtc->dev);
|
|
if (!state)
|
|
return -ENOMEM;
|
|
|
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
|
|
retry:
|
|
crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
if (IS_ERR(crtc_state)) {
|
|
ret = PTR_ERR(crtc_state);
|
|
goto fail;
|
|
}
|
|
|
|
primary_state = drm_atomic_get_plane_state(state, crtc->primary);
|
|
if (IS_ERR(primary_state)) {
|
|
ret = PTR_ERR(primary_state);
|
|
goto fail;
|
|
}
|
|
|
|
if (!set->mode) {
|
|
WARN_ON(set->fb);
|
|
WARN_ON(set->num_connectors);
|
|
|
|
crtc_state->enable = false;
|
|
|
|
ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
|
|
if (ret != 0)
|
|
goto fail;
|
|
|
|
drm_atomic_set_fb_for_plane(primary_state, NULL);
|
|
|
|
goto commit;
|
|
}
|
|
|
|
WARN_ON(!set->fb);
|
|
WARN_ON(!set->num_connectors);
|
|
|
|
crtc_state->enable = true;
|
|
drm_mode_copy(&crtc_state->mode, set->mode);
|
|
|
|
ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
|
|
if (ret != 0)
|
|
goto fail;
|
|
drm_atomic_set_fb_for_plane(primary_state, set->fb);
|
|
primary_state->crtc_x = 0;
|
|
primary_state->crtc_y = 0;
|
|
primary_state->crtc_h = set->mode->vdisplay;
|
|
primary_state->crtc_w = set->mode->hdisplay;
|
|
primary_state->src_x = set->x << 16;
|
|
primary_state->src_y = set->y << 16;
|
|
primary_state->src_h = set->mode->vdisplay << 16;
|
|
primary_state->src_w = set->mode->hdisplay << 16;
|
|
|
|
commit:
|
|
ret = update_output_state(state, set);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = drm_atomic_commit(state);
|
|
if (ret != 0)
|
|
goto fail;
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
return 0;
|
|
fail:
|
|
if (ret == -EDEADLK)
|
|
goto backoff;
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
return ret;
|
|
backoff:
|
|
drm_atomic_state_clear(state);
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
/*
|
|
* Someone might have exchanged the framebuffer while we dropped locks
|
|
* in the backoff code. We need to fix up the fb refcount tracking the
|
|
* core does for us.
|
|
*/
|
|
crtc->primary->old_fb = crtc->primary->fb;
|
|
|
|
goto retry;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_set_config);
|
|
|
|
/**
|
|
* drm_atomic_helper_crtc_set_property - helper for crtc prorties
|
|
* @crtc: DRM crtc
|
|
* @property: DRM property
|
|
* @val: value of property
|
|
*
|
|
* Provides a default plane disablle handler using the atomic driver interface.
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, error code on failure
|
|
*/
|
|
int
|
|
drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
|
|
struct drm_property *property,
|
|
uint64_t val)
|
|
{
|
|
struct drm_atomic_state *state;
|
|
struct drm_crtc_state *crtc_state;
|
|
int ret = 0;
|
|
|
|
state = drm_atomic_state_alloc(crtc->dev);
|
|
if (!state)
|
|
return -ENOMEM;
|
|
|
|
/* ->set_property is always called with all locks held. */
|
|
state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
|
|
retry:
|
|
crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
if (IS_ERR(crtc_state)) {
|
|
ret = PTR_ERR(crtc_state);
|
|
goto fail;
|
|
}
|
|
|
|
ret = drm_atomic_crtc_set_property(crtc, crtc_state,
|
|
property, val);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = drm_atomic_commit(state);
|
|
if (ret != 0)
|
|
goto fail;
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
return 0;
|
|
fail:
|
|
if (ret == -EDEADLK)
|
|
goto backoff;
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
return ret;
|
|
backoff:
|
|
drm_atomic_state_clear(state);
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
goto retry;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property);
|
|
|
|
/**
|
|
* drm_atomic_helper_plane_set_property - helper for plane prorties
|
|
* @plane: DRM plane
|
|
* @property: DRM property
|
|
* @val: value of property
|
|
*
|
|
* Provides a default plane disable handler using the atomic driver interface.
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, error code on failure
|
|
*/
|
|
int
|
|
drm_atomic_helper_plane_set_property(struct drm_plane *plane,
|
|
struct drm_property *property,
|
|
uint64_t val)
|
|
{
|
|
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;
|
|
|
|
/* ->set_property is always called with all locks held. */
|
|
state->acquire_ctx = plane->dev->mode_config.acquire_ctx;
|
|
retry:
|
|
plane_state = drm_atomic_get_plane_state(state, plane);
|
|
if (IS_ERR(plane_state)) {
|
|
ret = PTR_ERR(plane_state);
|
|
goto fail;
|
|
}
|
|
|
|
ret = drm_atomic_plane_set_property(plane, plane_state,
|
|
property, val);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = drm_atomic_commit(state);
|
|
if (ret != 0)
|
|
goto fail;
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
return 0;
|
|
fail:
|
|
if (ret == -EDEADLK)
|
|
goto backoff;
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
return ret;
|
|
backoff:
|
|
drm_atomic_state_clear(state);
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
goto retry;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_plane_set_property);
|
|
|
|
/**
|
|
* drm_atomic_helper_connector_set_property - helper for connector prorties
|
|
* @connector: DRM connector
|
|
* @property: DRM property
|
|
* @val: value of property
|
|
*
|
|
* Provides a default plane disablle handler using the atomic driver interface.
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, error code on failure
|
|
*/
|
|
int
|
|
drm_atomic_helper_connector_set_property(struct drm_connector *connector,
|
|
struct drm_property *property,
|
|
uint64_t val)
|
|
{
|
|
struct drm_atomic_state *state;
|
|
struct drm_connector_state *connector_state;
|
|
int ret = 0;
|
|
|
|
state = drm_atomic_state_alloc(connector->dev);
|
|
if (!state)
|
|
return -ENOMEM;
|
|
|
|
/* ->set_property is always called with all locks held. */
|
|
state->acquire_ctx = connector->dev->mode_config.acquire_ctx;
|
|
retry:
|
|
connector_state = drm_atomic_get_connector_state(state, connector);
|
|
if (IS_ERR(connector_state)) {
|
|
ret = PTR_ERR(connector_state);
|
|
goto fail;
|
|
}
|
|
|
|
ret = drm_atomic_connector_set_property(connector, connector_state,
|
|
property, val);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = drm_atomic_commit(state);
|
|
if (ret != 0)
|
|
goto fail;
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
return 0;
|
|
fail:
|
|
if (ret == -EDEADLK)
|
|
goto backoff;
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
return ret;
|
|
backoff:
|
|
drm_atomic_state_clear(state);
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
goto retry;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_connector_set_property);
|
|
|
|
/**
|
|
* 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
|
|
*
|
|
* Provides a default page flip implementation using the atomic driver interface.
|
|
*
|
|
* Note that for now so called async page flips (i.e. updates which are not
|
|
* synchronized to vblank) are not supported, since the atomic interfaces have
|
|
* no provisions for this yet.
|
|
*
|
|
* Returns:
|
|
* Returns 0 on success, negative errno numbers on failure.
|
|
*/
|
|
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_plane *plane = crtc->primary;
|
|
struct drm_atomic_state *state;
|
|
struct drm_plane_state *plane_state;
|
|
struct drm_crtc_state *crtc_state;
|
|
int ret = 0;
|
|
|
|
if (flags & DRM_MODE_PAGE_FLIP_ASYNC)
|
|
return -EINVAL;
|
|
|
|
state = drm_atomic_state_alloc(plane->dev);
|
|
if (!state)
|
|
return -ENOMEM;
|
|
|
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
|
|
retry:
|
|
crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
if (IS_ERR(crtc_state)) {
|
|
ret = PTR_ERR(crtc_state);
|
|
goto fail;
|
|
}
|
|
crtc_state->event = event;
|
|
|
|
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);
|
|
|
|
ret = drm_atomic_async_commit(state);
|
|
if (ret != 0)
|
|
goto fail;
|
|
|
|
/* TODO: ->page_flip is the only driver callback where the core
|
|
* doesn't update plane->fb. For now patch it up here. */
|
|
plane->fb = plane->state->fb;
|
|
|
|
/* Driver takes ownership of state on successful async commit. */
|
|
return 0;
|
|
fail:
|
|
if (ret == -EDEADLK)
|
|
goto backoff;
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
return ret;
|
|
backoff:
|
|
drm_atomic_state_clear(state);
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
/*
|
|
* Someone might have exchanged the framebuffer while we dropped locks
|
|
* in the backoff code. We need to fix up the fb refcount tracking the
|
|
* core does for us.
|
|
*/
|
|
plane->old_fb = plane->fb;
|
|
|
|
goto retry;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_page_flip);
|
|
|
|
/**
|
|
* DOC: atomic state reset and initialization
|
|
*
|
|
* Both the drm core and the atomic helpers assume that there is always the full
|
|
* and correct atomic software state for all connectors, CRTCs and planes
|
|
* available. Which is a bit a problem on driver load and also after system
|
|
* suspend. One way to solve this is to have a hardware state read-out
|
|
* infrastructure which reconstructs the full software state (e.g. the i915
|
|
* driver).
|
|
*
|
|
* The simpler solution is to just reset the software state to everything off,
|
|
* which is easiest to do by calling drm_mode_config_reset(). To facilitate this
|
|
* the atomic helpers provide default reset implementations for all hooks.
|
|
*/
|
|
|
|
/**
|
|
* drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs
|
|
* @crtc: drm CRTC
|
|
*
|
|
* Resets the atomic state for @crtc by freeing the state pointer (which might
|
|
* be NULL, e.g. at driver load time) and allocating a new empty state object.
|
|
*/
|
|
void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc)
|
|
{
|
|
kfree(crtc->state);
|
|
crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL);
|
|
|
|
if (crtc->state)
|
|
crtc->state->crtc = crtc;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_crtc_reset);
|
|
|
|
/**
|
|
* drm_atomic_helper_crtc_duplicate_state - default state duplicate hook
|
|
* @crtc: drm CRTC
|
|
*
|
|
* Default CRTC state duplicate hook for drivers which don't have their own
|
|
* subclassed CRTC state structure.
|
|
*/
|
|
struct drm_crtc_state *
|
|
drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc)
|
|
{
|
|
struct drm_crtc_state *state;
|
|
|
|
if (WARN_ON(!crtc->state))
|
|
return NULL;
|
|
|
|
state = kmemdup(crtc->state, sizeof(*crtc->state), GFP_KERNEL);
|
|
|
|
if (state) {
|
|
state->mode_changed = false;
|
|
state->planes_changed = false;
|
|
state->event = NULL;
|
|
}
|
|
|
|
return state;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state);
|
|
|
|
/**
|
|
* drm_atomic_helper_crtc_destroy_state - default state destroy hook
|
|
* @crtc: drm CRTC
|
|
* @state: CRTC state object to release
|
|
*
|
|
* Default CRTC state destroy hook for drivers which don't have their own
|
|
* subclassed CRTC state structure.
|
|
*/
|
|
void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
|
|
struct drm_crtc_state *state)
|
|
{
|
|
kfree(state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state);
|
|
|
|
/**
|
|
* drm_atomic_helper_plane_reset - default ->reset hook for planes
|
|
* @plane: drm plane
|
|
*
|
|
* Resets the atomic state for @plane by freeing the state pointer (which might
|
|
* be NULL, e.g. at driver load time) and allocating a new empty state object.
|
|
*/
|
|
void drm_atomic_helper_plane_reset(struct drm_plane *plane)
|
|
{
|
|
if (plane->state && plane->state->fb)
|
|
drm_framebuffer_unreference(plane->state->fb);
|
|
|
|
kfree(plane->state);
|
|
plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL);
|
|
|
|
if (plane->state)
|
|
plane->state->plane = plane;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_plane_reset);
|
|
|
|
/**
|
|
* drm_atomic_helper_plane_duplicate_state - default state duplicate hook
|
|
* @plane: drm plane
|
|
*
|
|
* Default plane state duplicate hook for drivers which don't have their own
|
|
* subclassed plane state structure.
|
|
*/
|
|
struct drm_plane_state *
|
|
drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane)
|
|
{
|
|
struct drm_plane_state *state;
|
|
|
|
if (WARN_ON(!plane->state))
|
|
return NULL;
|
|
|
|
state = kmemdup(plane->state, sizeof(*plane->state), GFP_KERNEL);
|
|
|
|
if (state && state->fb)
|
|
drm_framebuffer_reference(state->fb);
|
|
|
|
return state;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state);
|
|
|
|
/**
|
|
* drm_atomic_helper_plane_destroy_state - default state destroy hook
|
|
* @plane: drm plane
|
|
* @state: plane state object to release
|
|
*
|
|
* Default plane state destroy hook for drivers which don't have their own
|
|
* subclassed plane state structure.
|
|
*/
|
|
void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
|
|
struct drm_plane_state *state)
|
|
{
|
|
if (state->fb)
|
|
drm_framebuffer_unreference(state->fb);
|
|
|
|
kfree(state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state);
|
|
|
|
/**
|
|
* drm_atomic_helper_connector_reset - default ->reset hook for connectors
|
|
* @connector: drm connector
|
|
*
|
|
* Resets the atomic state for @connector by freeing the state pointer (which
|
|
* might be NULL, e.g. at driver load time) and allocating a new empty state
|
|
* object.
|
|
*/
|
|
void drm_atomic_helper_connector_reset(struct drm_connector *connector)
|
|
{
|
|
kfree(connector->state);
|
|
connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL);
|
|
|
|
if (connector->state)
|
|
connector->state->connector = connector;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_connector_reset);
|
|
|
|
/**
|
|
* drm_atomic_helper_connector_duplicate_state - default state duplicate hook
|
|
* @connector: drm connector
|
|
*
|
|
* Default connector state duplicate hook for drivers which don't have their own
|
|
* subclassed connector state structure.
|
|
*/
|
|
struct drm_connector_state *
|
|
drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector)
|
|
{
|
|
if (WARN_ON(!connector->state))
|
|
return NULL;
|
|
|
|
return kmemdup(connector->state, sizeof(*connector->state), GFP_KERNEL);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state);
|
|
|
|
/**
|
|
* drm_atomic_helper_connector_destroy_state - default state destroy hook
|
|
* @connector: drm connector
|
|
* @state: connector state object to release
|
|
*
|
|
* Default connector state destroy hook for drivers which don't have their own
|
|
* subclassed connector state structure.
|
|
*/
|
|
void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
|
|
struct drm_connector_state *state)
|
|
{
|
|
kfree(state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state);
|