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![Daniel Vetter](/assets/img/avatar_default.png)
It's not obvious at first sight that this is a fastpath, make that clearer with a goto. Fallout from a discussion with Liviu on irc. v2: Drop bogus hunks that crept in. v3: Make it compile. Cc: Liviu.Dudau@arm.com Acked-by: Liviu.Dudau@arm.com Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1465986266-2831-1-git-send-email-daniel.vetter@ffwll.ch
3408 lines
97 KiB
C
3408 lines
97 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
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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(), 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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* 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 *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 = drm_atomic_get_existing_crtc_state(state,
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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_existing_crtc_state(state,
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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 *conn_state;
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struct drm_connector *connector;
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struct drm_encoder *encoder;
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unsigned encoder_mask = 0;
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int i, ret;
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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_connector_in_state(state, connector, 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 (!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, conn_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_atomic_helper_best_encoder(connector);
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if (new_encoder) {
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if (encoder_mask & (1 << drm_encoder_index(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 |= 1 << drm_encoder_index(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_for_each_connector(connector, state->dev) {
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struct drm_crtc_state *crtc_state;
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if (drm_atomic_get_existing_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 & (1 << drm_encoder_index(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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return -EINVAL;
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}
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conn_state = drm_atomic_get_connector_state(state, connector);
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if (IS_ERR(conn_state))
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return PTR_ERR(conn_state);
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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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conn_state->crtc->base.id, conn_state->crtc->name,
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connector->base.id, connector->name);
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crtc_state = drm_atomic_get_existing_crtc_state(state, conn_state->crtc);
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ret = drm_atomic_set_crtc_for_connector(conn_state, NULL);
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if (ret)
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return ret;
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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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return ret;
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crtc_state->active = false;
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}
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}
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return 0;
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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_existing_crtc_state(state, crtc);
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crtc_state->encoder_mask &=
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~(1 << drm_encoder_index(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_existing_crtc_state(state, crtc);
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crtc_state->encoder_mask |=
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1 << drm_encoder_index(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 *connector_state;
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int i;
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for_each_connector_in_state(state, connector, connector_state, i) {
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struct drm_crtc *encoder_crtc;
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if (connector_state->best_encoder != encoder)
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continue;
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encoder_crtc = 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, connector_state, NULL);
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crtc_state = drm_atomic_get_existing_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 *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 (connector->state->crtc != connector_state->crtc) {
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if (connector->state->crtc) {
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crtc_state = drm_atomic_get_existing_crtc_state(state, connector->state->crtc);
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crtc_state->connectors_changed = true;
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}
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if (connector_state->crtc) {
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crtc_state = drm_atomic_get_existing_crtc_state(state, 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 (!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, connector_state, NULL);
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return 0;
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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,
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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_atomic_helper_best_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, connector_state->crtc)) {
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DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n",
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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 -EINVAL;
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}
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if (new_encoder == connector_state->best_encoder) {
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set_best_encoder(state, 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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connector_state->crtc->base.id,
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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, connector_state, new_encoder);
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crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc);
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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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connector_state->crtc->base.id,
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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 *crtc_state;
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struct drm_connector *connector;
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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_each_crtc_in_state(state, crtc, crtc_state, i) {
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if (!crtc_state->mode_changed &&
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!crtc_state->connectors_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_each_connector_in_state(state, connector, 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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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 = drm_atomic_get_existing_crtc_state(state,
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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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ret = drm_bridge_mode_fixup(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_ATOMIC("Bridge fixup failed\n");
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return -EINVAL;
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}
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if (funcs && funcs->atomic_check) {
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ret = funcs->atomic_check(encoder, crtc_state,
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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, &crtc_state->mode,
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&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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for_each_crtc_in_state(state, crtc, crtc_state, i) {
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const struct drm_crtc_helper_funcs *funcs;
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if (!crtc_state->enable)
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continue;
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if (!crtc_state->mode_changed &&
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!crtc_state->connectors_changed)
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continue;
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funcs = crtc->helper_private;
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if (!funcs->mode_fixup)
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continue;
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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_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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}
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}
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return 0;
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}
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|
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/**
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* drm_atomic_helper_check_modeset - 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 and adds any additional connectors needed for full modesets and calls
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* down into ->mode_fixup functions of the driver backend.
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*
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* crtc_state->mode_changed is set when the input mode is changed.
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* crtc_state->connectors_changed is set when a connector is added or
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* removed from the crtc.
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* crtc_state->active_changed is set when crtc_state->active changes,
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* which is used for dpms.
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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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struct drm_crtc *crtc;
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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 i, ret;
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for_each_crtc_in_state(state, crtc, crtc_state, i) {
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if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) {
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DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n",
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crtc->base.id, crtc->name);
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crtc_state->mode_changed = true;
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}
|
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|
|
if (crtc->state->enable != 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.
|
|
*/
|
|
crtc_state->mode_changed = true;
|
|
crtc_state->connectors_changed = true;
|
|
}
|
|
}
|
|
|
|
ret = handle_conflicting_encoders(state, state->legacy_set_config);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for_each_connector_in_state(state, connector, connector_state, i) {
|
|
/*
|
|
* This only sets crtc->mode_changed for routing changes,
|
|
* drivers must set crtc->mode_changed themselves when connector
|
|
* properties need to be updated.
|
|
*/
|
|
ret = update_connector_routing(state, connector,
|
|
connector_state);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* After all the routing has been prepared we need to add in any
|
|
* connector which is itself unchanged, but who's crtc changes it's
|
|
* configuration. This must be done before calling mode_fixup in case a
|
|
* crtc only changed its mode but has the same set of connectors.
|
|
*/
|
|
for_each_crtc_in_state(state, crtc, crtc_state, i) {
|
|
bool has_connectors =
|
|
!!crtc_state->connector_mask;
|
|
|
|
/*
|
|
* We must set ->active_changed after walking connectors for
|
|
* otherwise an update that only changes active would result in
|
|
* a full modeset because update_connector_routing force that.
|
|
*/
|
|
if (crtc->state->active != crtc_state->active) {
|
|
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n",
|
|
crtc->base.id, crtc->name);
|
|
crtc_state->active_changed = true;
|
|
}
|
|
|
|
if (!drm_atomic_crtc_needs_modeset(crtc_state))
|
|
continue;
|
|
|
|
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n",
|
|
crtc->base.id, crtc->name,
|
|
crtc_state->enable ? 'y' : 'n',
|
|
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;
|
|
|
|
if (crtc_state->enable != has_connectors) {
|
|
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n",
|
|
crtc->base.id, crtc->name);
|
|
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
return mode_fixup(state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_check_modeset);
|
|
|
|
/**
|
|
* 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
|
|
* ->atomic_check hooks provided by the driver.
|
|
*
|
|
* It also sets 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 *crtc_state;
|
|
struct drm_plane *plane;
|
|
struct drm_plane_state *plane_state;
|
|
int i, ret = 0;
|
|
|
|
for_each_plane_in_state(state, plane, plane_state, i) {
|
|
const struct drm_plane_helper_funcs *funcs;
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
drm_atomic_helper_plane_changed(state, plane_state, plane);
|
|
|
|
if (!funcs || !funcs->atomic_check)
|
|
continue;
|
|
|
|
ret = funcs->atomic_check(plane, plane_state);
|
|
if (ret) {
|
|
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n",
|
|
plane->base.id, plane->name);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
for_each_crtc_in_state(state, crtc, 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, 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 ->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
|
|
* ->atomic_check functions depend upon an updated adjusted_mode.clock to
|
|
* e.g. properly compute watermarks.
|
|
*
|
|
* 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)
|
|
{
|
|
struct drm_connector *connector;
|
|
struct drm_connector_state *old_conn_state;
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *old_crtc_state;
|
|
int i;
|
|
|
|
for_each_connector_in_state(old_state, connector, old_conn_state, i) {
|
|
const struct drm_encoder_helper_funcs *funcs;
|
|
struct drm_encoder *encoder;
|
|
|
|
/* Shut down everything that's in the changeset and currently
|
|
* still on. So need to check the old, saved state. */
|
|
if (!old_conn_state->crtc)
|
|
continue;
|
|
|
|
old_crtc_state = drm_atomic_get_existing_crtc_state(old_state,
|
|
old_conn_state->crtc);
|
|
|
|
if (!old_crtc_state->active ||
|
|
!drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state))
|
|
continue;
|
|
|
|
encoder = old_conn_state->best_encoder;
|
|
|
|
/* We shouldn't get this far if we didn't previously have
|
|
* an encoder.. but WARN_ON() rather than explode.
|
|
*/
|
|
if (WARN_ON(!encoder))
|
|
continue;
|
|
|
|
funcs = encoder->helper_private;
|
|
|
|
DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n",
|
|
encoder->base.id, encoder->name);
|
|
|
|
/*
|
|
* Each encoder has at most one connector (since we always steal
|
|
* it away), so we won't call disable hooks twice.
|
|
*/
|
|
drm_bridge_disable(encoder->bridge);
|
|
|
|
/* Right function depends upon target state. */
|
|
if (funcs) {
|
|
if (connector->state->crtc && funcs->prepare)
|
|
funcs->prepare(encoder);
|
|
else if (funcs->disable)
|
|
funcs->disable(encoder);
|
|
else if (funcs->dpms)
|
|
funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
|
|
}
|
|
|
|
drm_bridge_post_disable(encoder->bridge);
|
|
}
|
|
|
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
|
|
const struct drm_crtc_helper_funcs *funcs;
|
|
|
|
/* Shut down everything that needs a full modeset. */
|
|
if (!drm_atomic_crtc_needs_modeset(crtc->state))
|
|
continue;
|
|
|
|
if (!old_crtc_state->active)
|
|
continue;
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n",
|
|
crtc->base.id, crtc->name);
|
|
|
|
|
|
/* Right function depends upon target state. */
|
|
if (crtc->state->enable && funcs->prepare)
|
|
funcs->prepare(crtc);
|
|
else if (funcs->disable)
|
|
funcs->disable(crtc);
|
|
else
|
|
funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state
|
|
* @dev: DRM device
|
|
* @old_state: atomic state object with old state structures
|
|
*
|
|
* This function updates all the various legacy modeset state pointers in
|
|
* connectors, encoders and crtcs. It also updates the timestamping constants
|
|
* used for precise vblank timestamps by calling
|
|
* drm_calc_timestamping_constants().
|
|
*
|
|
* Drivers can use this for building their own atomic commit if they don't have
|
|
* a pure helper-based modeset implementation.
|
|
*/
|
|
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;
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *old_crtc_state;
|
|
int i;
|
|
|
|
/* clear out existing links and update dpms */
|
|
for_each_connector_in_state(old_state, connector, old_conn_state, i) {
|
|
if (connector->encoder) {
|
|
WARN_ON(!connector->encoder->crtc);
|
|
|
|
connector->encoder->crtc = NULL;
|
|
connector->encoder = NULL;
|
|
}
|
|
|
|
crtc = connector->state->crtc;
|
|
if ((!crtc && old_conn_state->crtc) ||
|
|
(crtc && drm_atomic_crtc_needs_modeset(crtc->state))) {
|
|
struct drm_property *dpms_prop =
|
|
dev->mode_config.dpms_property;
|
|
int mode = DRM_MODE_DPMS_OFF;
|
|
|
|
if (crtc && crtc->state->active)
|
|
mode = DRM_MODE_DPMS_ON;
|
|
|
|
connector->dpms = mode;
|
|
drm_object_property_set_value(&connector->base,
|
|
dpms_prop, mode);
|
|
}
|
|
}
|
|
|
|
/* set new links */
|
|
for_each_connector_in_state(old_state, connector, old_conn_state, i) {
|
|
if (!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_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
|
|
struct drm_plane *primary = crtc->primary;
|
|
|
|
crtc->mode = crtc->state->mode;
|
|
crtc->enabled = crtc->state->enable;
|
|
|
|
if (drm_atomic_get_existing_plane_state(old_state, primary) &&
|
|
primary->state->crtc == crtc) {
|
|
crtc->x = primary->state->src_x >> 16;
|
|
crtc->y = primary->state->src_y >> 16;
|
|
}
|
|
|
|
if (crtc->state->enable)
|
|
drm_calc_timestamping_constants(crtc,
|
|
&crtc->state->adjusted_mode);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state);
|
|
|
|
static void
|
|
crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
{
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *old_crtc_state;
|
|
struct drm_connector *connector;
|
|
struct drm_connector_state *old_conn_state;
|
|
int i;
|
|
|
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
|
|
const struct drm_crtc_helper_funcs *funcs;
|
|
|
|
if (!crtc->state->mode_changed)
|
|
continue;
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
if (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_connector_in_state(old_state, connector, old_conn_state, i) {
|
|
const struct drm_encoder_helper_funcs *funcs;
|
|
struct drm_crtc_state *new_crtc_state;
|
|
struct drm_encoder *encoder;
|
|
struct drm_display_mode *mode, *adjusted_mode;
|
|
|
|
if (!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;
|
|
|
|
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->mode_set)
|
|
funcs->mode_set(encoder, mode, adjusted_mode);
|
|
|
|
drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs
|
|
* @dev: DRM device
|
|
* @old_state: atomic state object with old state structures
|
|
*
|
|
* This function shuts down all the outputs that need to be shut down and
|
|
* prepares them (if required) with the new mode.
|
|
*
|
|
* For compatibility with legacy crtc helpers this should be called before
|
|
* drm_atomic_helper_commit_planes(), which is what the default commit function
|
|
* does. But drivers with different needs can group the modeset commits together
|
|
* and do the plane commits at the end. This is useful for drivers doing runtime
|
|
* PM since planes updates then only happen when the CRTC is actually enabled.
|
|
*/
|
|
void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
|
|
struct drm_atomic_state *old_state)
|
|
{
|
|
disable_outputs(dev, old_state);
|
|
|
|
drm_atomic_helper_update_legacy_modeset_state(dev, old_state);
|
|
|
|
crtc_set_mode(dev, old_state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables);
|
|
|
|
/**
|
|
* 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_connector *connector;
|
|
struct drm_connector_state *old_conn_state;
|
|
int i;
|
|
|
|
for_each_crtc_in_state(old_state, crtc, old_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(crtc->state))
|
|
continue;
|
|
|
|
if (!crtc->state->active)
|
|
continue;
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
if (crtc->state->enable) {
|
|
DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n",
|
|
crtc->base.id, crtc->name);
|
|
|
|
if (funcs->enable)
|
|
funcs->enable(crtc);
|
|
else
|
|
funcs->commit(crtc);
|
|
}
|
|
}
|
|
|
|
for_each_connector_in_state(old_state, connector, old_conn_state, i) {
|
|
const struct drm_encoder_helper_funcs *funcs;
|
|
struct drm_encoder *encoder;
|
|
|
|
if (!connector->state->best_encoder)
|
|
continue;
|
|
|
|
if (!connector->state->crtc->state->active ||
|
|
!drm_atomic_crtc_needs_modeset(connector->state->crtc->state))
|
|
continue;
|
|
|
|
encoder = connector->state->best_encoder;
|
|
funcs = encoder->helper_private;
|
|
|
|
DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n",
|
|
encoder->base.id, encoder->name);
|
|
|
|
/*
|
|
* Each encoder has at most one connector (since we always steal
|
|
* it away), so we won't call enable hooks twice.
|
|
*/
|
|
drm_bridge_pre_enable(encoder->bridge);
|
|
|
|
if (funcs) {
|
|
if (funcs->enable)
|
|
funcs->enable(encoder);
|
|
else if (funcs->commit)
|
|
funcs->commit(encoder);
|
|
}
|
|
|
|
drm_bridge_enable(encoder->bridge);
|
|
}
|
|
}
|
|
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
|
|
*
|
|
* 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)
|
|
*/
|
|
void drm_atomic_helper_wait_for_fences(struct drm_device *dev,
|
|
struct drm_atomic_state *state)
|
|
{
|
|
struct drm_plane *plane;
|
|
struct drm_plane_state *plane_state;
|
|
int i;
|
|
|
|
for_each_plane_in_state(state, plane, plane_state, i) {
|
|
if (!plane->state->fence)
|
|
continue;
|
|
|
|
WARN_ON(!plane->state->fb);
|
|
|
|
fence_wait(plane->state->fence, false);
|
|
fence_put(plane->state->fence);
|
|
plane->state->fence = NULL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences);
|
|
|
|
/**
|
|
* drm_atomic_helper_framebuffer_changed - check if framebuffer has changed
|
|
* @dev: DRM device
|
|
* @old_state: atomic state object with old state structures
|
|
* @crtc: DRM crtc
|
|
*
|
|
* Checks whether the framebuffer used for this CRTC changes as a result of
|
|
* the atomic update. This is useful for drivers which cannot use
|
|
* drm_atomic_helper_wait_for_vblanks() and need to reimplement its
|
|
* functionality.
|
|
*
|
|
* Returns:
|
|
* true if the framebuffer changed.
|
|
*/
|
|
bool drm_atomic_helper_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 i;
|
|
|
|
for_each_plane_in_state(old_state, plane, old_plane_state, i) {
|
|
if (plane->state->crtc != crtc &&
|
|
old_plane_state->crtc != crtc)
|
|
continue;
|
|
|
|
if (plane->state->fb != old_plane_state->fb)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_framebuffer_changed);
|
|
|
|
/**
|
|
* 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 i, ret;
|
|
|
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
|
|
/* 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;
|
|
|
|
/* Legacy cursor ioctls are completely unsynced, and userspace
|
|
* relies on that (by doing tons of cursor updates). */
|
|
if (old_state->legacy_cursor_update)
|
|
continue;
|
|
|
|
if (!drm_atomic_helper_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_crtc_vblank_count(crtc);
|
|
}
|
|
|
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
|
|
if (!old_crtc_state->enable)
|
|
continue;
|
|
|
|
ret = wait_event_timeout(dev->vblank[i].queue,
|
|
old_crtc_state->last_vblank_count !=
|
|
drm_crtc_vblank_count(crtc),
|
|
msecs_to_jiffies(50));
|
|
|
|
WARN(!ret, "[CRTC:%d] vblank wait timed out\n", crtc->base.id);
|
|
|
|
drm_crtc_vblank_put(crtc);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks);
|
|
|
|
/**
|
|
* drm_atomic_helper_commit_tail - commit atomic update to hardware
|
|
* @state: new modeset state to be committed
|
|
*
|
|
* This is the default implemenation for the ->atomic_commit_tail() hook of the
|
|
* &drm_mode_config_helper_funcs vtable.
|
|
*
|
|
* Note that the default ordering of how the various stages are called is to
|
|
* match the legacy modeset helper library closest. One peculiarity of that is
|
|
* that it doesn't mesh well with runtime PM at all.
|
|
*
|
|
* For drivers supporting runtime PM the recommended sequence is instead ::
|
|
*
|
|
* drm_atomic_helper_commit_modeset_disables(dev, state);
|
|
*
|
|
* drm_atomic_helper_commit_modeset_enables(dev, state);
|
|
*
|
|
* drm_atomic_helper_commit_planes(dev, state, true);
|
|
*
|
|
* for committing the atomic update to hardware. See the kerneldoc entries for
|
|
* these three functions for more details.
|
|
*/
|
|
void drm_atomic_helper_commit_tail(struct drm_atomic_state *state)
|
|
{
|
|
struct drm_device *dev = state->dev;
|
|
|
|
drm_atomic_helper_commit_modeset_disables(dev, state);
|
|
|
|
drm_atomic_helper_commit_planes(dev, state, false);
|
|
|
|
drm_atomic_helper_commit_modeset_enables(dev, state);
|
|
|
|
drm_atomic_helper_commit_hw_done(state);
|
|
|
|
drm_atomic_helper_wait_for_vblanks(dev, state);
|
|
|
|
drm_atomic_helper_cleanup_planes(dev, state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit_tail);
|
|
|
|
static void commit_tail(struct drm_atomic_state *state)
|
|
{
|
|
struct drm_device *dev = state->dev;
|
|
struct drm_mode_config_helper_funcs *funcs;
|
|
|
|
funcs = dev->mode_config.helper_private;
|
|
|
|
drm_atomic_helper_wait_for_fences(dev, state);
|
|
|
|
drm_atomic_helper_wait_for_dependencies(state);
|
|
|
|
if (funcs && funcs->atomic_commit_tail)
|
|
funcs->atomic_commit_tail(state);
|
|
else
|
|
drm_atomic_helper_commit_tail(state);
|
|
|
|
drm_atomic_helper_commit_cleanup_done(state);
|
|
|
|
drm_atomic_state_free(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_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.
|
|
*
|
|
* Note that right now this function does not support nonblocking commits, hence
|
|
* driver writers must implement their own version for now.
|
|
*
|
|
* Committing the actual hardware state is done through the
|
|
* ->atomic_commit_tail() callback of the &drm_mode_config_helper_funcs vtable,
|
|
* or it's default implementation drm_atomic_helper_commit_tail().
|
|
*
|
|
* RETURNS:
|
|
* Zero for success or -errno.
|
|
*/
|
|
int drm_atomic_helper_commit(struct drm_device *dev,
|
|
struct drm_atomic_state *state,
|
|
bool nonblock)
|
|
{
|
|
int ret;
|
|
|
|
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;
|
|
|
|
/*
|
|
* 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(state, true);
|
|
|
|
/*
|
|
* Everything below can be run asynchronously without the need to grab
|
|
* any modeset locks at all under one condition: It must be guaranteed
|
|
* that the asynchronous work has either been cancelled (if the driver
|
|
* supports it, which at least requires that the framebuffers get
|
|
* cleaned up with drm_atomic_helper_cleanup_planes()) or completed
|
|
* before the new state gets committed on the software side with
|
|
* drm_atomic_helper_swap_state().
|
|
*
|
|
* This scheme allows new atomic state updates to be prepared and
|
|
* checked in parallel to the asynchronous completion of the previous
|
|
* update. Which is important since compositors need to figure out the
|
|
* composition of the next frame right after having submitted the
|
|
* current layout.
|
|
*
|
|
* NOTE: Commit work has multiple phases, first hardware commit, then
|
|
* cleanup. We want them to overlap, hence need system_unbound_wq to
|
|
* make sure work items don't artifically stall on each another.
|
|
*/
|
|
|
|
if (nonblock)
|
|
queue_work(system_unbound_wq, &state->commit_work);
|
|
else
|
|
commit_tail(state);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit);
|
|
|
|
/**
|
|
* DOC: implementing nonblocking commit
|
|
*
|
|
* Nonblocking atomic commits have to be implemented in the following sequence:
|
|
*
|
|
* 1. Run drm_atomic_helper_prepare_planes() first. This is the only function
|
|
* which commit needs to call which can fail, so we want to run it first and
|
|
* synchronously.
|
|
*
|
|
* 2. Synchronize with any outstanding nonblocking commit worker threads which
|
|
* might be affected the new state update. This can be done by either cancelling
|
|
* or flushing the work items, depending upon whether the driver can deal with
|
|
* cancelled updates. Note that it is important to ensure that the framebuffer
|
|
* cleanup is still done when cancelling.
|
|
*
|
|
* Asynchronous workers need to have sufficient parallelism to be able to run
|
|
* different atomic commits on different CRTCs in parallel. The simplest way to
|
|
* achive this is by running them on the &system_unbound_wq work queue. Note
|
|
* that drivers are not required to split up atomic commits and run an
|
|
* individual commit in parallel - userspace is supposed to do that if it cares.
|
|
* But it might be beneficial to do that for modesets, since those necessarily
|
|
* must be done as one global operation, and enabling or disabling a CRTC can
|
|
* take a long time. But even that is not required.
|
|
*
|
|
* 3. The software state is updated synchronously with
|
|
* drm_atomic_helper_swap_state(). Doing this under the protection of all modeset
|
|
* locks means concurrent callers never see inconsistent state. And doing this
|
|
* while it's guaranteed that no relevant nonblocking worker runs means that
|
|
* nonblocking workers do not need grab any locks. Actually they must not grab
|
|
* locks, for otherwise the work flushing will deadlock.
|
|
*
|
|
* 4. Schedule a work item to do all subsequent steps, using the split-out
|
|
* commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and
|
|
* then cleaning up the framebuffers after the old framebuffer is no longer
|
|
* being displayed.
|
|
*
|
|
* The above scheme is implemented in the atomic helper libraries in
|
|
* drm_atomic_helper_commit() using a bunch of helper functions. See
|
|
* drm_atomic_helper_setup_commit() for a starting point.
|
|
*/
|
|
|
|
static int stall_checks(struct drm_crtc *crtc, bool nonblock)
|
|
{
|
|
struct drm_crtc_commit *commit, *stall_commit = NULL;
|
|
bool completed = true;
|
|
int i;
|
|
long ret = 0;
|
|
|
|
spin_lock(&crtc->commit_lock);
|
|
i = 0;
|
|
list_for_each_entry(commit, &crtc->commit_list, commit_entry) {
|
|
if (i == 0) {
|
|
completed = try_wait_for_completion(&commit->flip_done);
|
|
/* Userspace is not allowed to get ahead of the previous
|
|
* commit with nonblocking ones. */
|
|
if (!completed && nonblock) {
|
|
spin_unlock(&crtc->commit_lock);
|
|
return -EBUSY;
|
|
}
|
|
} else if (i == 1) {
|
|
stall_commit = commit;
|
|
drm_crtc_commit_get(stall_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;
|
|
}
|
|
|
|
/**
|
|
* 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 ->atomic_commit hook.
|
|
*
|
|
* To be able to use this support drivers need to use a few more helper
|
|
* functions. drm_atomic_helper_wait_for_dependencies() must be called before
|
|
* actually committing the hardware state, and for nonblocking commits this call
|
|
* must be placed in the async worker. See also drm_atomic_helper_swap_state()
|
|
* and it's stall parameter, for when a driver's commit hooks look at the
|
|
* ->state pointers of struct &drm_crtc, &drm_plane or &drm_connector 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 esay-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 *crtc_state;
|
|
struct drm_crtc_commit *commit;
|
|
int i, ret;
|
|
|
|
for_each_crtc_in_state(state, crtc, crtc_state, i) {
|
|
commit = kzalloc(sizeof(*commit), GFP_KERNEL);
|
|
if (!commit)
|
|
return -ENOMEM;
|
|
|
|
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;
|
|
|
|
state->crtcs[i].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 (!crtc->state->active && !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 (!crtc_state->event) {
|
|
commit->event = kzalloc(sizeof(*commit->event),
|
|
GFP_KERNEL);
|
|
if (!commit->event)
|
|
return -ENOMEM;
|
|
|
|
crtc_state->event = commit->event;
|
|
}
|
|
|
|
crtc_state->event->base.completion = &commit->flip_done;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_setup_commit);
|
|
|
|
|
|
static struct drm_crtc_commit *preceeding_commit(struct drm_crtc *crtc)
|
|
{
|
|
struct drm_crtc_commit *commit;
|
|
int i = 0;
|
|
|
|
list_for_each_entry(commit, &crtc->commit_list, commit_entry) {
|
|
/* skip the first entry, that's the current commit */
|
|
if (i == 1)
|
|
return commit;
|
|
i++;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits
|
|
* @state: new modeset state to be committed
|
|
*
|
|
* This function waits for all preceeding commits that touch the same CRTC as
|
|
* @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_vblank_send_event on the event member of
|
|
* &drm_crtc_state).
|
|
*
|
|
* 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 *state)
|
|
{
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *crtc_state;
|
|
struct drm_crtc_commit *commit;
|
|
int i;
|
|
long ret;
|
|
|
|
for_each_crtc_in_state(state, crtc, crtc_state, i) {
|
|
spin_lock(&crtc->commit_lock);
|
|
commit = preceeding_commit(crtc);
|
|
if (commit)
|
|
drm_crtc_commit_get(commit);
|
|
spin_unlock(&crtc->commit_lock);
|
|
|
|
if (!commit)
|
|
continue;
|
|
|
|
ret = wait_for_completion_timeout(&commit->hw_done,
|
|
10*HZ);
|
|
if (ret == 0)
|
|
DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n",
|
|
crtc->base.id, crtc->name);
|
|
|
|
/* Currently no support for overwriting flips, hence
|
|
* stall for previous one to execute completely. */
|
|
ret = wait_for_completion_timeout(&commit->flip_done,
|
|
10*HZ);
|
|
if (ret == 0)
|
|
DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n",
|
|
crtc->base.id, crtc->name);
|
|
|
|
drm_crtc_commit_put(commit);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies);
|
|
|
|
/**
|
|
* drm_atomic_helper_commit_hw_done - setup possible nonblocking commit
|
|
* @state: new modeset state to be committed
|
|
*
|
|
* 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 *state)
|
|
{
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *crtc_state;
|
|
struct drm_crtc_commit *commit;
|
|
int i;
|
|
|
|
for_each_crtc_in_state(state, crtc, crtc_state, i) {
|
|
commit = state->crtcs[i].commit;
|
|
if (!commit)
|
|
continue;
|
|
|
|
/* backend must have consumed any event by now */
|
|
WARN_ON(crtc->state->event);
|
|
spin_lock(&crtc->commit_lock);
|
|
complete_all(&commit->hw_done);
|
|
spin_unlock(&crtc->commit_lock);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done);
|
|
|
|
/**
|
|
* drm_atomic_helper_commit_cleanup_done - signal completion of commit
|
|
* @state: new modeset state to be committed
|
|
*
|
|
* This signals completion of the atomic update @state, including any cleanup
|
|
* work. If used, it must be called right before calling
|
|
* drm_atomic_state_free().
|
|
*
|
|
* 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 *state)
|
|
{
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *crtc_state;
|
|
struct drm_crtc_commit *commit;
|
|
int i;
|
|
long ret;
|
|
|
|
for_each_crtc_in_state(state, crtc, crtc_state, i) {
|
|
commit = state->crtcs[i].commit;
|
|
if (WARN_ON(!commit))
|
|
continue;
|
|
|
|
spin_lock(&crtc->commit_lock);
|
|
complete_all(&commit->cleanup_done);
|
|
WARN_ON(!try_wait_for_completion(&commit->hw_done));
|
|
|
|
/* commit_list borrows our reference, need to remove before we
|
|
* clean up our drm_atomic_state. But only after it actually
|
|
* completed, otherwise subsequent commits won't stall properly. */
|
|
if (try_wait_for_completion(&commit->flip_done))
|
|
goto del_commit;
|
|
|
|
spin_unlock(&crtc->commit_lock);
|
|
|
|
/* We must wait for the vblank event to signal our completion
|
|
* before releasing our reference, since the vblank work does
|
|
* not hold a reference of its own. */
|
|
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);
|
|
|
|
spin_lock(&crtc->commit_lock);
|
|
del_commit:
|
|
list_del(&commit->commit_entry);
|
|
spin_unlock(&crtc->commit_lock);
|
|
}
|
|
}
|
|
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. 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)
|
|
{
|
|
struct drm_plane *plane;
|
|
struct drm_plane_state *plane_state;
|
|
int ret, i, j;
|
|
|
|
for_each_plane_in_state(state, plane, plane_state, i) {
|
|
const struct drm_plane_helper_funcs *funcs;
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
if (funcs->prepare_fb) {
|
|
ret = funcs->prepare_fb(plane, plane_state);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
for_each_plane_in_state(state, plane, 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, plane_state);
|
|
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_prepare_planes);
|
|
|
|
bool plane_crtc_active(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
|
|
* @active_only: Only commit on active CRTC if set
|
|
*
|
|
* 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
|
|
* parameters to true 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.
|
|
*
|
|
* The drm_atomic_helper_commit() default implementation only sets @active_only
|
|
* to false 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,
|
|
bool active_only)
|
|
{
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *old_crtc_state;
|
|
struct drm_plane *plane;
|
|
struct drm_plane_state *old_plane_state;
|
|
int i;
|
|
|
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
|
|
const struct drm_crtc_helper_funcs *funcs;
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
if (!funcs || !funcs->atomic_begin)
|
|
continue;
|
|
|
|
if (active_only && !crtc->state->active)
|
|
continue;
|
|
|
|
funcs->atomic_begin(crtc, old_crtc_state);
|
|
}
|
|
|
|
for_each_plane_in_state(old_state, plane, old_plane_state, i) {
|
|
const struct drm_plane_helper_funcs *funcs;
|
|
bool disabling;
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
if (!funcs)
|
|
continue;
|
|
|
|
disabling = drm_atomic_plane_disabling(plane, old_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(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)
|
|
funcs->atomic_disable(plane, old_plane_state);
|
|
else if (plane->state->crtc || disabling)
|
|
funcs->atomic_update(plane, old_plane_state);
|
|
}
|
|
|
|
for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
|
|
const struct drm_crtc_helper_funcs *funcs;
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
if (!funcs || !funcs->atomic_flush)
|
|
continue;
|
|
|
|
if (active_only && !crtc->state->active)
|
|
continue;
|
|
|
|
funcs->atomic_flush(crtc, old_crtc_state);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit_planes);
|
|
|
|
/**
|
|
* drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc
|
|
* @old_crtc_state: atomic state object with the old crtc state
|
|
*
|
|
* This function commits the new plane state using the plane and atomic helper
|
|
* functions for planes on the specific crtc. It assumes that the atomic state
|
|
* has already been pushed into the relevant object state pointers, since this
|
|
* step can no longer fail.
|
|
*
|
|
* This function is useful when plane updates should be done crtc-by-crtc
|
|
* instead of one global step like drm_atomic_helper_commit_planes() does.
|
|
*
|
|
* This function can only be savely used when planes are not allowed to move
|
|
* between different CRTCs because this function doesn't handle inter-CRTC
|
|
* depencies. Callers need to ensure that either no such depencies exist,
|
|
* resolve them through ordering of commit calls or through some other means.
|
|
*/
|
|
void
|
|
drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state)
|
|
{
|
|
const struct drm_crtc_helper_funcs *crtc_funcs;
|
|
struct drm_crtc *crtc = old_crtc_state->crtc;
|
|
struct drm_atomic_state *old_state = old_crtc_state->state;
|
|
struct drm_plane *plane;
|
|
unsigned plane_mask;
|
|
|
|
plane_mask = old_crtc_state->plane_mask;
|
|
plane_mask |= crtc->state->plane_mask;
|
|
|
|
crtc_funcs = crtc->helper_private;
|
|
if (crtc_funcs && crtc_funcs->atomic_begin)
|
|
crtc_funcs->atomic_begin(crtc, old_crtc_state);
|
|
|
|
drm_for_each_plane_mask(plane, crtc->dev, plane_mask) {
|
|
struct drm_plane_state *old_plane_state =
|
|
drm_atomic_get_existing_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(plane->state->crtc && plane->state->crtc != crtc);
|
|
|
|
if (drm_atomic_plane_disabling(plane, old_plane_state) &&
|
|
plane_funcs->atomic_disable)
|
|
plane_funcs->atomic_disable(plane, old_plane_state);
|
|
else if (plane->state->crtc ||
|
|
drm_atomic_plane_disabling(plane, old_plane_state))
|
|
plane_funcs->atomic_update(plane, old_plane_state);
|
|
}
|
|
|
|
if (crtc_funcs && crtc_funcs->atomic_flush)
|
|
crtc_funcs->atomic_flush(crtc, old_crtc_state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc);
|
|
|
|
/**
|
|
* drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes
|
|
* @crtc: CRTC
|
|
* @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 disable callback to disable
|
|
* all planes before shutting down the display pipeline.
|
|
*
|
|
* 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
|
|
* ->atomic_disable() plane hook.
|
|
*/
|
|
void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc,
|
|
bool atomic)
|
|
{
|
|
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_for_each_plane(plane, crtc->dev) {
|
|
const struct drm_plane_helper_funcs *plane_funcs =
|
|
plane->helper_private;
|
|
|
|
if (plane->state->crtc != crtc || !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 *plane_state;
|
|
int i;
|
|
|
|
for_each_plane_in_state(old_state, plane, plane_state, i) {
|
|
const struct drm_plane_helper_funcs *funcs;
|
|
|
|
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 proceeding 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 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.
|
|
*
|
|
* @stall must be set when nonblocking commits for this driver directly access
|
|
* the ->state pointer of &drm_plane, &drm_crtc or &drm_connector. With the
|
|
* current atomic helpers this is almost always the case, since the helpers
|
|
* don't pass the right state structures to the callbacks.
|
|
*/
|
|
void drm_atomic_helper_swap_state(struct drm_atomic_state *state,
|
|
bool stall)
|
|
{
|
|
int i;
|
|
long ret;
|
|
struct drm_connector *connector;
|
|
struct drm_connector_state *conn_state;
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *crtc_state;
|
|
struct drm_plane *plane;
|
|
struct drm_plane_state *plane_state;
|
|
struct drm_crtc_commit *commit;
|
|
|
|
if (stall) {
|
|
for_each_crtc_in_state(state, crtc, crtc_state, i) {
|
|
spin_lock(&crtc->commit_lock);
|
|
commit = list_first_entry_or_null(&crtc->commit_list,
|
|
struct drm_crtc_commit, commit_entry);
|
|
if (commit)
|
|
drm_crtc_commit_get(commit);
|
|
spin_unlock(&crtc->commit_lock);
|
|
|
|
if (!commit)
|
|
continue;
|
|
|
|
ret = wait_for_completion_timeout(&commit->hw_done,
|
|
10*HZ);
|
|
if (ret == 0)
|
|
DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n",
|
|
crtc->base.id, crtc->name);
|
|
drm_crtc_commit_put(commit);
|
|
}
|
|
}
|
|
|
|
for_each_connector_in_state(state, connector, conn_state, i) {
|
|
connector->state->state = state;
|
|
swap(state->connectors[i].state, connector->state);
|
|
connector->state->state = NULL;
|
|
}
|
|
|
|
for_each_crtc_in_state(state, crtc, crtc_state, i) {
|
|
crtc->state->state = state;
|
|
swap(state->crtcs[i].state, crtc->state);
|
|
crtc->state->state = NULL;
|
|
|
|
if (state->crtcs[i].commit) {
|
|
spin_lock(&crtc->commit_lock);
|
|
list_add(&state->crtcs[i].commit->commit_entry,
|
|
&crtc->commit_list);
|
|
spin_unlock(&crtc->commit_lock);
|
|
|
|
state->crtcs[i].commit->event = NULL;
|
|
}
|
|
}
|
|
|
|
for_each_plane_in_state(state, plane, plane_state, i) {
|
|
plane->state->state = state;
|
|
swap(state->planes[i].state, 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_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);
|
|
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;
|
|
}
|
|
|
|
if (plane_state->crtc && (plane == plane->crtc->cursor))
|
|
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);
|
|
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);
|
|
|
|
/* just used from fb-helper and atomic-helper: */
|
|
int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
|
|
struct drm_plane_state *plane_state)
|
|
{
|
|
int ret;
|
|
|
|
ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
drm_atomic_set_fb_for_plane(plane_state, NULL);
|
|
plane_state->crtc_x = 0;
|
|
plane_state->crtc_y = 0;
|
|
plane_state->crtc_w = 0;
|
|
plane_state->crtc_h = 0;
|
|
plane_state->src_x = 0;
|
|
plane_state->src_y = 0;
|
|
plane_state->src_w = 0;
|
|
plane_state->src_h = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int update_output_state(struct drm_atomic_state *state,
|
|
struct drm_mode_set *set)
|
|
{
|
|
struct drm_device *dev = set->crtc->dev;
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *crtc_state;
|
|
struct drm_connector *connector;
|
|
struct drm_connector_state *conn_state;
|
|
int ret, i;
|
|
|
|
ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
|
|
state->acquire_ctx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* First disable all connectors on the target crtc. */
|
|
ret = drm_atomic_add_affected_connectors(state, set->crtc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for_each_connector_in_state(state, connector, conn_state, i) {
|
|
if (conn_state->crtc == set->crtc) {
|
|
ret = drm_atomic_set_crtc_for_connector(conn_state,
|
|
NULL);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Then set all connectors from set->connectors on the target crtc */
|
|
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);
|
|
|
|
ret = drm_atomic_set_crtc_for_connector(conn_state,
|
|
set->crtc);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
for_each_crtc_in_state(state, crtc, crtc_state, i) {
|
|
/* Don't update ->enable for the CRTC in the set_config request,
|
|
* since a mismatch would indicate a bug in the upper layers.
|
|
* The actual modeset code later on will catch any
|
|
* inconsistencies here. */
|
|
if (crtc == set->crtc)
|
|
continue;
|
|
|
|
if (!crtc_state->connector_mask) {
|
|
ret = drm_atomic_set_mode_prop_for_crtc(crtc_state,
|
|
NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
crtc_state->active = false;
|
|
}
|
|
}
|
|
|
|
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;
|
|
int ret = 0;
|
|
|
|
state = drm_atomic_state_alloc(crtc->dev);
|
|
if (!state)
|
|
return -ENOMEM;
|
|
|
|
state->legacy_set_config = true;
|
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
|
|
retry:
|
|
ret = __drm_atomic_helper_set_config(set, state);
|
|
if (ret != 0)
|
|
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);
|
|
|
|
/* just used from fb-helper and atomic-helper: */
|
|
int __drm_atomic_helper_set_config(struct drm_mode_set *set,
|
|
struct drm_atomic_state *state)
|
|
{
|
|
struct drm_crtc_state *crtc_state;
|
|
struct drm_plane_state *primary_state;
|
|
struct drm_crtc *crtc = set->crtc;
|
|
int hdisplay, vdisplay;
|
|
int ret;
|
|
|
|
crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
if (IS_ERR(crtc_state))
|
|
return PTR_ERR(crtc_state);
|
|
|
|
primary_state = drm_atomic_get_plane_state(state, crtc->primary);
|
|
if (IS_ERR(primary_state))
|
|
return PTR_ERR(primary_state);
|
|
|
|
if (!set->mode) {
|
|
WARN_ON(set->fb);
|
|
WARN_ON(set->num_connectors);
|
|
|
|
ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
crtc_state->active = false;
|
|
|
|
ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
drm_atomic_set_fb_for_plane(primary_state, NULL);
|
|
|
|
goto commit;
|
|
}
|
|
|
|
WARN_ON(!set->fb);
|
|
WARN_ON(!set->num_connectors);
|
|
|
|
ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
crtc_state->active = true;
|
|
|
|
ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay);
|
|
|
|
drm_atomic_set_fb_for_plane(primary_state, set->fb);
|
|
primary_state->crtc_x = 0;
|
|
primary_state->crtc_y = 0;
|
|
primary_state->crtc_w = hdisplay;
|
|
primary_state->crtc_h = vdisplay;
|
|
primary_state->src_x = set->x << 16;
|
|
primary_state->src_y = set->y << 16;
|
|
if (primary_state->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) {
|
|
primary_state->src_w = vdisplay << 16;
|
|
primary_state->src_h = hdisplay << 16;
|
|
} else {
|
|
primary_state->src_w = hdisplay << 16;
|
|
primary_state->src_h = vdisplay << 16;
|
|
}
|
|
|
|
commit:
|
|
ret = update_output_state(state, set);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* 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()
|
|
*/
|
|
int drm_atomic_helper_disable_all(struct drm_device *dev,
|
|
struct drm_modeset_acquire_ctx *ctx)
|
|
{
|
|
struct drm_atomic_state *state;
|
|
struct drm_connector *conn;
|
|
int err;
|
|
|
|
state = drm_atomic_state_alloc(dev);
|
|
if (!state)
|
|
return -ENOMEM;
|
|
|
|
state->acquire_ctx = ctx;
|
|
|
|
drm_for_each_connector(conn, dev) {
|
|
struct drm_crtc *crtc = conn->state->crtc;
|
|
struct drm_crtc_state *crtc_state;
|
|
|
|
if (!crtc || conn->dpms != DRM_MODE_DPMS_ON)
|
|
continue;
|
|
|
|
crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
if (IS_ERR(crtc_state)) {
|
|
err = PTR_ERR(crtc_state);
|
|
goto free;
|
|
}
|
|
|
|
crtc_state->active = false;
|
|
}
|
|
|
|
err = drm_atomic_commit(state);
|
|
|
|
free:
|
|
if (err < 0)
|
|
drm_atomic_state_free(state);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_disable_all);
|
|
|
|
/**
|
|
* 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()
|
|
*/
|
|
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;
|
|
|
|
drm_modeset_acquire_init(&ctx, 0);
|
|
|
|
retry:
|
|
err = drm_modeset_lock_all_ctx(dev, &ctx);
|
|
if (err < 0) {
|
|
state = ERR_PTR(err);
|
|
goto unlock;
|
|
}
|
|
|
|
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_free(state);
|
|
state = ERR_PTR(err);
|
|
goto unlock;
|
|
}
|
|
|
|
unlock:
|
|
if (PTR_ERR(state) == -EDEADLK) {
|
|
drm_modeset_backoff(&ctx);
|
|
goto retry;
|
|
}
|
|
|
|
drm_modeset_drop_locks(&ctx);
|
|
drm_modeset_acquire_fini(&ctx);
|
|
return state;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_suspend);
|
|
|
|
/**
|
|
* 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_mode_config *config = &dev->mode_config;
|
|
int err;
|
|
|
|
drm_mode_config_reset(dev);
|
|
drm_modeset_lock_all(dev);
|
|
state->acquire_ctx = config->acquire_ctx;
|
|
err = drm_atomic_commit(state);
|
|
drm_modeset_unlock_all(dev);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_resume);
|
|
|
|
/**
|
|
* drm_atomic_helper_crtc_set_property - helper for crtc properties
|
|
* @crtc: DRM crtc
|
|
* @property: DRM property
|
|
* @val: value of property
|
|
*
|
|
* Provides a default crtc set_property 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 properties
|
|
* @plane: DRM plane
|
|
* @property: DRM property
|
|
* @val: value of property
|
|
*
|
|
* Provides a default plane set_property 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 properties
|
|
* @connector: DRM connector
|
|
* @property: DRM property
|
|
* @val: value of property
|
|
*
|
|
* Provides a default connector set_property 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);
|
|
|
|
/* Make sure we don't accidentally do a full modeset. */
|
|
state->allow_modeset = false;
|
|
if (!crtc_state->active) {
|
|
DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n",
|
|
crtc->base.id);
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
ret = drm_atomic_nonblocking_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_page_flip);
|
|
|
|
/**
|
|
* drm_atomic_helper_connector_dpms() - connector dpms helper implementation
|
|
* @connector: affected connector
|
|
* @mode: DPMS mode
|
|
*
|
|
* This is the main helper function provided by the atomic helper framework for
|
|
* implementing the legacy DPMS connector interface. It computes the new desired
|
|
* ->active state for the corresponding CRTC (if the connector is enabled) and
|
|
* updates it.
|
|
*
|
|
* Returns:
|
|
* Returns 0 on success, negative errno numbers on failure.
|
|
*/
|
|
int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
|
|
int mode)
|
|
{
|
|
struct drm_mode_config *config = &connector->dev->mode_config;
|
|
struct drm_atomic_state *state;
|
|
struct drm_crtc_state *crtc_state;
|
|
struct drm_crtc *crtc;
|
|
struct drm_connector *tmp_connector;
|
|
int ret;
|
|
bool active = false;
|
|
int old_mode = connector->dpms;
|
|
|
|
if (mode != DRM_MODE_DPMS_ON)
|
|
mode = DRM_MODE_DPMS_OFF;
|
|
|
|
connector->dpms = mode;
|
|
crtc = connector->state->crtc;
|
|
|
|
if (!crtc)
|
|
return 0;
|
|
|
|
state = drm_atomic_state_alloc(connector->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;
|
|
}
|
|
|
|
WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
|
|
|
|
drm_for_each_connector(tmp_connector, connector->dev) {
|
|
if (tmp_connector->state->crtc != crtc)
|
|
continue;
|
|
|
|
if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
|
|
active = true;
|
|
break;
|
|
}
|
|
}
|
|
crtc_state->active = active;
|
|
|
|
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;
|
|
|
|
connector->dpms = old_mode;
|
|
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_dpms);
|
|
|
|
/**
|
|
* drm_atomic_helper_best_encoder - Helper for &drm_connector_helper_funcs
|
|
* ->best_encoder callback
|
|
* @connector: Connector control structure
|
|
*
|
|
* This is a &drm_connector_helper_funcs ->best_encoder callback helper for
|
|
* connectors that support exactly 1 encoder, statically determined at driver
|
|
* init time.
|
|
*/
|
|
struct drm_encoder *
|
|
drm_atomic_helper_best_encoder(struct drm_connector *connector)
|
|
{
|
|
WARN_ON(connector->encoder_ids[1]);
|
|
return drm_encoder_find(connector->dev, connector->encoder_ids[0]);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_best_encoder);
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* On the upside the precise state tracking of atomic simplifies system suspend
|
|
* and resume a lot. For drivers using drm_mode_config_reset() a complete recipe
|
|
* is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume().
|
|
* For other drivers the building blocks are split out, see the documentation
|
|
* for these functions.
|
|
*/
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
if (crtc->state)
|
|
__drm_atomic_helper_crtc_destroy_state(crtc->state);
|
|
|
|
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 - copy atomic CRTC state
|
|
* @crtc: CRTC object
|
|
* @state: atomic CRTC state
|
|
*
|
|
* Copies atomic state from a CRTC's current state and resets inferred values.
|
|
* This is useful for drivers that subclass the CRTC state.
|
|
*/
|
|
void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
|
|
struct drm_crtc_state *state)
|
|
{
|
|
memcpy(state, crtc->state, sizeof(*state));
|
|
|
|
if (state->mode_blob)
|
|
drm_property_reference_blob(state->mode_blob);
|
|
if (state->degamma_lut)
|
|
drm_property_reference_blob(state->degamma_lut);
|
|
if (state->ctm)
|
|
drm_property_reference_blob(state->ctm);
|
|
if (state->gamma_lut)
|
|
drm_property_reference_blob(state->gamma_lut);
|
|
state->mode_changed = false;
|
|
state->active_changed = false;
|
|
state->planes_changed = false;
|
|
state->connectors_changed = false;
|
|
state->color_mgmt_changed = false;
|
|
state->event = NULL;
|
|
}
|
|
EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state);
|
|
|
|
/**
|
|
* 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 = kmalloc(sizeof(*state), GFP_KERNEL);
|
|
if (state)
|
|
__drm_atomic_helper_crtc_duplicate_state(crtc, state);
|
|
|
|
return state;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state);
|
|
|
|
/**
|
|
* __drm_atomic_helper_crtc_destroy_state - release CRTC state
|
|
* @state: CRTC state object to release
|
|
*
|
|
* Releases all resources stored in the CRTC state without actually freeing
|
|
* the memory of the CRTC state. This is useful for drivers that subclass the
|
|
* CRTC state.
|
|
*/
|
|
void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state)
|
|
{
|
|
drm_property_unreference_blob(state->mode_blob);
|
|
drm_property_unreference_blob(state->degamma_lut);
|
|
drm_property_unreference_blob(state->ctm);
|
|
drm_property_unreference_blob(state->gamma_lut);
|
|
}
|
|
EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_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)
|
|
{
|
|
__drm_atomic_helper_crtc_destroy_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)
|
|
__drm_atomic_helper_plane_destroy_state(plane->state);
|
|
|
|
kfree(plane->state);
|
|
plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL);
|
|
|
|
if (plane->state) {
|
|
plane->state->plane = plane;
|
|
plane->state->rotation = BIT(DRM_ROTATE_0);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_plane_reset);
|
|
|
|
/**
|
|
* __drm_atomic_helper_plane_duplicate_state - copy atomic plane state
|
|
* @plane: plane object
|
|
* @state: atomic plane state
|
|
*
|
|
* Copies atomic state from a plane's current state. This is useful for
|
|
* drivers that subclass the plane state.
|
|
*/
|
|
void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
|
|
struct drm_plane_state *state)
|
|
{
|
|
memcpy(state, plane->state, sizeof(*state));
|
|
|
|
if (state->fb)
|
|
drm_framebuffer_reference(state->fb);
|
|
}
|
|
EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state);
|
|
|
|
/**
|
|
* 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 = kmalloc(sizeof(*state), GFP_KERNEL);
|
|
if (state)
|
|
__drm_atomic_helper_plane_duplicate_state(plane, state);
|
|
|
|
return state;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state);
|
|
|
|
/**
|
|
* __drm_atomic_helper_plane_destroy_state - release plane state
|
|
* @state: plane state object to release
|
|
*
|
|
* Releases all resources stored in the plane state without actually freeing
|
|
* the memory of the plane state. This is useful for drivers that subclass the
|
|
* plane state.
|
|
*/
|
|
void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state)
|
|
{
|
|
if (state->fb)
|
|
drm_framebuffer_unreference(state->fb);
|
|
}
|
|
EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_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)
|
|
{
|
|
__drm_atomic_helper_plane_destroy_state(state);
|
|
kfree(state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state);
|
|
|
|
/**
|
|
* __drm_atomic_helper_connector_reset - reset state on connector
|
|
* @connector: drm connector
|
|
* @conn_state: connector state to assign
|
|
*
|
|
* Initializes the newly allocated @conn_state and assigns it to
|
|
* #connector ->state, usually required when initializing the drivers
|
|
* or when called from the ->reset hook.
|
|
*
|
|
* This is useful for drivers that subclass the connector state.
|
|
*/
|
|
void
|
|
__drm_atomic_helper_connector_reset(struct drm_connector *connector,
|
|
struct drm_connector_state *conn_state)
|
|
{
|
|
if (conn_state)
|
|
conn_state->connector = connector;
|
|
|
|
connector->state = conn_state;
|
|
}
|
|
EXPORT_SYMBOL(__drm_atomic_helper_connector_reset);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
struct drm_connector_state *conn_state =
|
|
kzalloc(sizeof(*conn_state), GFP_KERNEL);
|
|
|
|
if (connector->state)
|
|
__drm_atomic_helper_connector_destroy_state(connector->state);
|
|
|
|
kfree(connector->state);
|
|
__drm_atomic_helper_connector_reset(connector, conn_state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_connector_reset);
|
|
|
|
/**
|
|
* __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
|
|
* @connector: connector object
|
|
* @state: atomic connector state
|
|
*
|
|
* Copies atomic state from a connector's current state. This is useful for
|
|
* drivers that subclass the connector state.
|
|
*/
|
|
void
|
|
__drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
|
|
struct drm_connector_state *state)
|
|
{
|
|
memcpy(state, connector->state, sizeof(*state));
|
|
if (state->crtc)
|
|
drm_connector_reference(connector);
|
|
}
|
|
EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
struct drm_connector_state *state;
|
|
|
|
if (WARN_ON(!connector->state))
|
|
return NULL;
|
|
|
|
state = kmalloc(sizeof(*state), GFP_KERNEL);
|
|
if (state)
|
|
__drm_atomic_helper_connector_duplicate_state(connector, state);
|
|
|
|
return state;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state);
|
|
|
|
/**
|
|
* 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_plane *plane;
|
|
struct drm_crtc *crtc;
|
|
int err = 0;
|
|
|
|
state = drm_atomic_state_alloc(dev);
|
|
if (!state)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
state->acquire_ctx = ctx;
|
|
|
|
drm_for_each_crtc(crtc, dev) {
|
|
struct drm_crtc_state *crtc_state;
|
|
|
|
crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
if (IS_ERR(crtc_state)) {
|
|
err = PTR_ERR(crtc_state);
|
|
goto free;
|
|
}
|
|
}
|
|
|
|
drm_for_each_plane(plane, dev) {
|
|
struct drm_plane_state *plane_state;
|
|
|
|
plane_state = drm_atomic_get_plane_state(state, plane);
|
|
if (IS_ERR(plane_state)) {
|
|
err = PTR_ERR(plane_state);
|
|
goto free;
|
|
}
|
|
}
|
|
|
|
drm_for_each_connector(conn, dev) {
|
|
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);
|
|
goto free;
|
|
}
|
|
}
|
|
|
|
/* clear the acquire context so that it isn't accidentally reused */
|
|
state->acquire_ctx = NULL;
|
|
|
|
free:
|
|
if (err < 0) {
|
|
drm_atomic_state_free(state);
|
|
state = ERR_PTR(err);
|
|
}
|
|
|
|
return state;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_duplicate_state);
|
|
|
|
/**
|
|
* __drm_atomic_helper_connector_destroy_state - release connector state
|
|
* @state: connector state object to release
|
|
*
|
|
* Releases all resources stored in the connector state without actually
|
|
* freeing the memory of the connector state. This is useful for drivers that
|
|
* subclass the connector state.
|
|
*/
|
|
void
|
|
__drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state)
|
|
{
|
|
/*
|
|
* This is currently a placeholder so that drivers that subclass the
|
|
* state will automatically do the right thing if code is ever added
|
|
* to this function.
|
|
*/
|
|
if (state->crtc)
|
|
drm_connector_unreference(state->connector);
|
|
}
|
|
EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_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)
|
|
{
|
|
__drm_atomic_helper_connector_destroy_state(state);
|
|
kfree(state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state);
|
|
|
|
/**
|
|
* drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table
|
|
* @crtc: CRTC object
|
|
* @red: red correction table
|
|
* @green: green correction table
|
|
* @blue: green correction table
|
|
* @size: size of the tables
|
|
*
|
|
* Implements support for legacy gamma correction table for drivers
|
|
* that support color management through the DEGAMMA_LUT/GAMMA_LUT
|
|
* properties.
|
|
*/
|
|
int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
|
|
u16 *red, u16 *green, u16 *blue,
|
|
uint32_t size)
|
|
{
|
|
struct drm_device *dev = crtc->dev;
|
|
struct drm_mode_config *config = &dev->mode_config;
|
|
struct drm_atomic_state *state;
|
|
struct drm_crtc_state *crtc_state;
|
|
struct drm_property_blob *blob = NULL;
|
|
struct drm_color_lut *blob_data;
|
|
int i, ret = 0;
|
|
|
|
state = drm_atomic_state_alloc(crtc->dev);
|
|
if (!state)
|
|
return -ENOMEM;
|
|
|
|
blob = drm_property_create_blob(dev,
|
|
sizeof(struct drm_color_lut) * size,
|
|
NULL);
|
|
if (IS_ERR(blob)) {
|
|
ret = PTR_ERR(blob);
|
|
blob = NULL;
|
|
goto fail;
|
|
}
|
|
|
|
/* Prepare GAMMA_LUT with the legacy values. */
|
|
blob_data = (struct drm_color_lut *) blob->data;
|
|
for (i = 0; i < size; i++) {
|
|
blob_data[i].red = red[i];
|
|
blob_data[i].green = green[i];
|
|
blob_data[i].blue = blue[i];
|
|
}
|
|
|
|
state->acquire_ctx = 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;
|
|
}
|
|
|
|
/* Reset DEGAMMA_LUT and CTM properties. */
|
|
ret = drm_atomic_crtc_set_property(crtc, crtc_state,
|
|
config->degamma_lut_property, 0);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = drm_atomic_crtc_set_property(crtc, crtc_state,
|
|
config->ctm_property, 0);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = drm_atomic_crtc_set_property(crtc, crtc_state,
|
|
config->gamma_lut_property, blob->base.id);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = drm_atomic_commit(state);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
|
|
drm_property_unreference_blob(blob);
|
|
|
|
return 0;
|
|
fail:
|
|
if (ret == -EDEADLK)
|
|
goto backoff;
|
|
|
|
drm_atomic_state_free(state);
|
|
drm_property_unreference_blob(blob);
|
|
|
|
return ret;
|
|
backoff:
|
|
drm_atomic_state_clear(state);
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
goto retry;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set);
|