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@@ -0,0 +1,1906 @@
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+/*
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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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+
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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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+/**
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+ * DOC: overview
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+ *
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+ * This helper library provides implementations of check and commit functions on
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+ * top of the CRTC modeset helper callbacks and the plane helper callbacks. It
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+ * also provides convenience implementations for the atomic state handling
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+ * callbacks for drivers which don't need to subclass the drm core structures to
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+ * add their own additional internal state.
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+ *
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+ * This library also provides default implementations for the check callback in
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+ * drm_atomic_helper_check and for the commit callback with
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+ * drm_atomic_helper_commit. But the individual stages and callbacks are expose
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+ * to allow drivers to mix and match and e.g. use the plane helpers only
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+ * together with a driver private modeset implementation.
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+ *
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+ * This library also provides implementations for all the legacy driver
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+ * interfaces on top of the atomic interface. See drm_atomic_helper_set_config,
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+ * drm_atomic_helper_disable_plane, drm_atomic_helper_disable_plane and the
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+ * various functions to implement set_property callbacks. New drivers must not
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+ * implement these functions themselves but must use the provided helpers.
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+ */
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+static void
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+drm_atomic_helper_plane_changed(struct drm_atomic_state *state,
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+ struct drm_plane_state *plane_state,
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+ struct drm_plane *plane)
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+{
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+ struct drm_crtc_state *crtc_state;
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+
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+ if (plane->state->crtc) {
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+ crtc_state = state->crtc_states[drm_crtc_index(plane->crtc)];
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+
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+ if (WARN_ON(!crtc_state))
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+ return;
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+
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+ crtc_state->planes_changed = true;
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+ }
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+
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+ if (plane_state->crtc) {
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+ crtc_state =
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+ state->crtc_states[drm_crtc_index(plane_state->crtc)];
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+
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+ if (WARN_ON(!crtc_state))
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+ return;
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+
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+ crtc_state->planes_changed = true;
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+ }
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+}
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+
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+static struct drm_crtc *
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+get_current_crtc_for_encoder(struct drm_device *dev,
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+ struct drm_encoder *encoder)
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+{
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+ struct drm_mode_config *config = &dev->mode_config;
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+ struct drm_connector *connector;
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+
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+ WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
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+
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+ list_for_each_entry(connector, &config->connector_list, head) {
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+ if (connector->state->best_encoder != encoder)
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+ continue;
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+
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+ return connector->state->crtc;
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+ }
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+
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+ return NULL;
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+}
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+
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+static int
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+steal_encoder(struct drm_atomic_state *state,
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+ struct drm_encoder *encoder,
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+ struct drm_crtc *encoder_crtc)
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+{
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+ struct drm_mode_config *config = &state->dev->mode_config;
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+ struct drm_crtc_state *crtc_state;
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+ struct drm_connector *connector;
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+ struct drm_connector_state *connector_state;
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+ int ret;
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+
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+ /*
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+ * We can only steal an encoder coming from a connector, which means we
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+ * must already hold the connection_mutex.
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+ */
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+ WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
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+
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+ DRM_DEBUG_KMS("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n",
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+ encoder->base.id, encoder->name,
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+ encoder_crtc->base.id);
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+
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+ crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc);
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+ if (IS_ERR(crtc_state))
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+ return PTR_ERR(crtc_state);
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+
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+ crtc_state->mode_changed = true;
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+
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+ list_for_each_entry(connector, &config->connector_list, head) {
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+ if (connector->state->best_encoder != encoder)
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+ continue;
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+
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+ DRM_DEBUG_KMS("Stealing encoder from [CONNECTOR:%d:%s]\n",
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+ connector->base.id,
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+ connector->name);
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+
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+ connector_state = drm_atomic_get_connector_state(state,
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+ connector);
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+ if (IS_ERR(connector_state))
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+ return PTR_ERR(connector_state);
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+
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+ ret = drm_atomic_set_crtc_for_connector(connector_state, NULL);
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+ if (ret)
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+ return ret;
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+ connector_state->best_encoder = NULL;
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+ }
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+
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+ return 0;
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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, int conn_idx)
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+{
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+ struct drm_connector_helper_funcs *funcs;
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+ struct drm_encoder *new_encoder;
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+ struct drm_crtc *encoder_crtc;
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+ struct drm_connector *connector;
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+ struct drm_connector_state *connector_state;
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+ struct drm_crtc_state *crtc_state;
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+ int idx, ret;
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+
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+ connector = state->connectors[conn_idx];
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+ connector_state = state->connector_states[conn_idx];
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+
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+ if (!connector)
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+ return 0;
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+
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+ DRM_DEBUG_KMS("Updating routing for [CONNECTOR:%d:%s]\n",
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+ connector->base.id,
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+ connector->name);
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+
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+ if (connector->state->crtc != connector_state->crtc) {
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+ if (connector->state->crtc) {
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+ idx = drm_crtc_index(connector->state->crtc);
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+
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+ crtc_state = state->crtc_states[idx];
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+ crtc_state->mode_changed = true;
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+ }
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+
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+ if (connector_state->crtc) {
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+ idx = drm_crtc_index(connector_state->crtc);
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+
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+ crtc_state = state->crtc_states[idx];
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+ crtc_state->mode_changed = true;
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+ }
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+ }
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+
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+ if (!connector_state->crtc) {
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+ DRM_DEBUG_KMS("Disabling [CONNECTOR:%d:%s]\n",
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+ connector->base.id,
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+ connector->name);
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+
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+ connector_state->best_encoder = NULL;
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+
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+ return 0;
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+ }
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+
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+ funcs = connector->helper_private;
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+ new_encoder = funcs->best_encoder(connector);
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+
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+ if (!new_encoder) {
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+ DRM_DEBUG_KMS("No suitable encoder found for [CONNECTOR:%d:%s]\n",
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+ connector->base.id,
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+ connector->name);
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+ return -EINVAL;
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+ }
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+
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+ if (new_encoder == connector_state->best_encoder) {
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+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n",
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+ connector->base.id,
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+ connector->name,
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+ new_encoder->base.id,
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+ new_encoder->name,
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+ connector_state->crtc->base.id);
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+
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+ return 0;
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+ }
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+
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+ encoder_crtc = get_current_crtc_for_encoder(state->dev,
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+ new_encoder);
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+
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+ if (encoder_crtc) {
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+ ret = steal_encoder(state, new_encoder, encoder_crtc);
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+ if (ret) {
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+ DRM_DEBUG_KMS("Encoder stealing failed for [CONNECTOR:%d:%s]\n",
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+ connector->base.id,
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+ connector->name);
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+ return ret;
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+ }
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+ }
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+
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+ connector_state->best_encoder = new_encoder;
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+ idx = drm_crtc_index(connector_state->crtc);
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+
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+ crtc_state = state->crtc_states[idx];
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+ crtc_state->mode_changed = true;
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+
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+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n",
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+ connector->base.id,
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+ connector->name,
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+ new_encoder->base.id,
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+ new_encoder->name,
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+ connector_state->crtc->base.id);
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+
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+ return 0;
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+}
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+
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+static int
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+mode_fixup(struct drm_atomic_state *state)
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+{
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+ int ncrtcs = state->dev->mode_config.num_crtc;
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+ int nconnectors = state->dev->mode_config.num_connector;
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+ struct drm_crtc_state *crtc_state;
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+ struct drm_connector_state *conn_state;
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+ int i;
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+ bool ret;
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+
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+ for (i = 0; i < ncrtcs; i++) {
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+ crtc_state = state->crtc_states[i];
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+
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+ if (!crtc_state || !crtc_state->mode_changed)
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+ continue;
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+
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+ drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode);
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+ }
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+
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+ for (i = 0; i < nconnectors; i++) {
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+ struct drm_encoder_helper_funcs *funcs;
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+ struct drm_encoder *encoder;
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+
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+ conn_state = state->connector_states[i];
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+
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+ if (!conn_state)
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+ continue;
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+
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+ WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc);
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+
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+ if (!conn_state->crtc || !conn_state->best_encoder)
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+ continue;
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+
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+ crtc_state =
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+ state->crtc_states[drm_crtc_index(conn_state->crtc)];
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+
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+ /*
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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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+
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+ if (encoder->bridge && encoder->bridge->funcs->mode_fixup) {
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+ ret = encoder->bridge->funcs->mode_fixup(
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+ encoder->bridge, &crtc_state->mode,
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+ &crtc_state->adjusted_mode);
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+ if (!ret) {
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+ DRM_DEBUG_KMS("Bridge fixup failed\n");
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+ return -EINVAL;
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+ }
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+ }
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+
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+
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+ ret = funcs->mode_fixup(encoder, &crtc_state->mode,
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+ &crtc_state->adjusted_mode);
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+ if (!ret) {
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+ DRM_DEBUG_KMS("[ENCODER:%d:%s] fixup failed\n",
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+ encoder->base.id, encoder->name);
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+ return -EINVAL;
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+ }
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+ }
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+
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+ for (i = 0; i < ncrtcs; i++) {
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+ struct drm_crtc_helper_funcs *funcs;
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+ struct drm_crtc *crtc;
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+
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+ crtc_state = state->crtc_states[i];
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+ crtc = state->crtcs[i];
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+
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+ if (!crtc_state || !crtc_state->mode_changed)
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+ continue;
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+
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+ funcs = crtc->helper_private;
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+ ret = funcs->mode_fixup(crtc, &crtc_state->mode,
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+ &crtc_state->adjusted_mode);
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+ if (!ret) {
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+ DRM_DEBUG_KMS("[CRTC:%d] fixup failed\n",
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+ crtc->base.id);
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+ return -EINVAL;
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+ }
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+ }
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+
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+ return 0;
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+}
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+
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+static int
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+drm_atomic_helper_check_prepare(struct drm_device *dev,
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+ struct drm_atomic_state *state)
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+{
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+ int ncrtcs = dev->mode_config.num_crtc;
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+ int nconnectors = dev->mode_config.num_connector;
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+ struct drm_crtc *crtc;
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+ struct drm_crtc_state *crtc_state;
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+ int i, ret;
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+
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+ for (i = 0; i < ncrtcs; i++) {
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+ crtc = state->crtcs[i];
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+ crtc_state = state->crtc_states[i];
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+
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+ if (!crtc)
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+ continue;
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+
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+ if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) {
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+ DRM_DEBUG_KMS("[CRTC:%d] mode changed\n",
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+ crtc->base.id);
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+ crtc_state->mode_changed = true;
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+ }
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+
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+ if (crtc->state->enable != crtc_state->enable) {
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+ DRM_DEBUG_KMS("[CRTC:%d] enable changed\n",
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+ crtc->base.id);
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+ crtc_state->mode_changed = true;
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+ }
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+ }
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+
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+ for (i = 0; i < nconnectors; i++) {
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+ /*
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+ * This only sets crtc->mode_changed for routing changes,
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+ * drivers must set crtc->mode_changed themselves when connector
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+ * properties need to be updated.
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+ */
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+ ret = update_connector_routing(state, i);
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+ if (ret)
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+ return ret;
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+ }
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+
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+ /*
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+ * After all the routing has been prepared we need to add in any
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+ * connector which is itself unchanged, but who's crtc changes it's
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+ * configuration. This must be done before calling mode_fixup in case a
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+ * crtc only changed its mode but has the same set of connectors.
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+ */
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+ for (i = 0; i < ncrtcs; i++) {
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+ int num_connectors;
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+
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+ crtc = state->crtcs[i];
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+ crtc_state = state->crtc_states[i];
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+
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+ if (!crtc || !crtc_state->mode_changed)
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+ continue;
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+
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+ DRM_DEBUG_KMS("[CRTC:%d] needs full modeset, enable: %c\n",
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+ crtc->base.id,
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+ crtc_state->enable ? 'y' : 'n');
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+
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+ ret = drm_atomic_add_affected_connectors(state, crtc);
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+ if (ret != 0)
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+ return ret;
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+
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+ num_connectors = drm_atomic_connectors_for_crtc(state,
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+ crtc);
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+
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+ if (crtc_state->enable != !!num_connectors) {
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+ DRM_DEBUG_KMS("[CRTC:%d] enabled/connectors mismatch\n",
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+ crtc->base.id);
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+
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+ return -EINVAL;
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+ }
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+ }
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+
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+ return mode_fixup(state);
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+}
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+
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+/**
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|
|
+ * 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.
|
|
|
+ *
|
|
|
+ * RETURNS
|
|
|
+ * Zero for success or -errno
|
|
|
+ */
|
|
|
+int drm_atomic_helper_check(struct drm_device *dev,
|
|
|
+ struct drm_atomic_state *state)
|
|
|
+{
|
|
|
+ int nplanes = dev->mode_config.num_total_plane;
|
|
|
+ int ncrtcs = dev->mode_config.num_crtc;
|
|
|
+ int i, ret = 0;
|
|
|
+
|
|
|
+ ret = drm_atomic_helper_check_prepare(dev, state);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ for (i = 0; i < nplanes; i++) {
|
|
|
+ struct drm_plane_helper_funcs *funcs;
|
|
|
+ struct drm_plane *plane = state->planes[i];
|
|
|
+ struct drm_plane_state *plane_state = state->plane_states[i];
|
|
|
+
|
|
|
+ if (!plane)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ 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_KMS("[PLANE:%d] atomic check failed\n",
|
|
|
+ plane->base.id);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < ncrtcs; i++) {
|
|
|
+ struct drm_crtc_helper_funcs *funcs;
|
|
|
+ struct drm_crtc *crtc = state->crtcs[i];
|
|
|
+
|
|
|
+ if (!crtc)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs = crtc->helper_private;
|
|
|
+
|
|
|
+ if (!funcs || !funcs->atomic_check)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ ret = funcs->atomic_check(crtc, state->crtc_states[i]);
|
|
|
+ if (ret) {
|
|
|
+ DRM_DEBUG_KMS("[CRTC:%d] atomic check failed\n",
|
|
|
+ crtc->base.id);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_check);
|
|
|
+
|
|
|
+static void
|
|
|
+disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
|
+{
|
|
|
+ int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
|
+ int nconnectors = old_state->dev->mode_config.num_connector;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ for (i = 0; i < nconnectors; i++) {
|
|
|
+ struct drm_connector_state *old_conn_state;
|
|
|
+ struct drm_connector *connector;
|
|
|
+ struct drm_encoder_helper_funcs *funcs;
|
|
|
+ struct drm_encoder *encoder;
|
|
|
+
|
|
|
+ old_conn_state = old_state->connector_states[i];
|
|
|
+ connector = old_state->connectors[i];
|
|
|
+
|
|
|
+ /* Shut down everything that's in the changeset and currently
|
|
|
+ * still on. So need to check the old, saved state. */
|
|
|
+ if (!old_conn_state || !old_conn_state->crtc)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ encoder = connector->state->best_encoder;
|
|
|
+
|
|
|
+ if (!encoder)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs = encoder->helper_private;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Each encoder has at most one connector (since we always steal
|
|
|
+ * it away), so we won't call call disable hooks twice.
|
|
|
+ */
|
|
|
+ if (encoder->bridge)
|
|
|
+ encoder->bridge->funcs->disable(encoder->bridge);
|
|
|
+
|
|
|
+ /* Right function depends upon target state. */
|
|
|
+ if (connector->state->crtc)
|
|
|
+ funcs->prepare(encoder);
|
|
|
+ else if (funcs->disable)
|
|
|
+ funcs->disable(encoder);
|
|
|
+ else
|
|
|
+ funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
|
|
|
+
|
|
|
+ if (encoder->bridge)
|
|
|
+ encoder->bridge->funcs->post_disable(encoder->bridge);
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < ncrtcs; i++) {
|
|
|
+ struct drm_crtc_helper_funcs *funcs;
|
|
|
+ struct drm_crtc *crtc;
|
|
|
+
|
|
|
+ crtc = old_state->crtcs[i];
|
|
|
+
|
|
|
+ /* Shut down everything that needs a full modeset. */
|
|
|
+ if (!crtc || !crtc->state->mode_changed)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs = crtc->helper_private;
|
|
|
+
|
|
|
+ /* Right function depends upon target state. */
|
|
|
+ if (crtc->state->enable)
|
|
|
+ funcs->prepare(crtc);
|
|
|
+ else if (funcs->disable)
|
|
|
+ funcs->disable(crtc);
|
|
|
+ else
|
|
|
+ funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void
|
|
|
+set_routing_links(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
|
+{
|
|
|
+ int nconnectors = dev->mode_config.num_connector;
|
|
|
+ int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ /* clear out existing links */
|
|
|
+ for (i = 0; i < nconnectors; i++) {
|
|
|
+ struct drm_connector *connector;
|
|
|
+
|
|
|
+ connector = old_state->connectors[i];
|
|
|
+
|
|
|
+ if (!connector || !connector->encoder)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ WARN_ON(!connector->encoder->crtc);
|
|
|
+
|
|
|
+ connector->encoder->crtc = NULL;
|
|
|
+ connector->encoder = NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* set new links */
|
|
|
+ for (i = 0; i < nconnectors; i++) {
|
|
|
+ struct drm_connector *connector;
|
|
|
+
|
|
|
+ connector = old_state->connectors[i];
|
|
|
+
|
|
|
+ if (!connector || !connector->state->crtc)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ if (WARN_ON(!connector->state->best_encoder))
|
|
|
+ continue;
|
|
|
+
|
|
|
+ connector->encoder = connector->state->best_encoder;
|
|
|
+ connector->encoder->crtc = connector->state->crtc;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* set legacy state in the crtc structure */
|
|
|
+ for (i = 0; i < ncrtcs; i++) {
|
|
|
+ struct drm_crtc *crtc;
|
|
|
+
|
|
|
+ crtc = old_state->crtcs[i];
|
|
|
+
|
|
|
+ if (!crtc)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ crtc->mode = crtc->state->mode;
|
|
|
+ crtc->enabled = crtc->state->enable;
|
|
|
+ crtc->x = crtc->primary->state->src_x >> 16;
|
|
|
+ crtc->y = crtc->primary->state->src_y >> 16;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void
|
|
|
+crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
|
+{
|
|
|
+ int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
|
+ int nconnectors = old_state->dev->mode_config.num_connector;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ for (i = 0; i < ncrtcs; i++) {
|
|
|
+ struct drm_crtc_helper_funcs *funcs;
|
|
|
+ struct drm_crtc *crtc;
|
|
|
+
|
|
|
+ crtc = old_state->crtcs[i];
|
|
|
+
|
|
|
+ if (!crtc || !crtc->state->mode_changed)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs = crtc->helper_private;
|
|
|
+
|
|
|
+ if (crtc->state->enable)
|
|
|
+ funcs->mode_set_nofb(crtc);
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < nconnectors; i++) {
|
|
|
+ struct drm_connector *connector;
|
|
|
+ struct drm_crtc_state *new_crtc_state;
|
|
|
+ struct drm_encoder_helper_funcs *funcs;
|
|
|
+ struct drm_encoder *encoder;
|
|
|
+ struct drm_display_mode *mode, *adjusted_mode;
|
|
|
+
|
|
|
+ connector = old_state->connectors[i];
|
|
|
+
|
|
|
+ if (!connector || !connector->state->best_encoder)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ encoder = connector->state->best_encoder;
|
|
|
+ funcs = encoder->helper_private;
|
|
|
+ new_crtc_state = connector->state->crtc->state;
|
|
|
+ mode = &new_crtc_state->mode;
|
|
|
+ adjusted_mode = &new_crtc_state->adjusted_mode;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Each encoder has at most one connector (since we always steal
|
|
|
+ * it away), so we won't call call mode_set hooks twice.
|
|
|
+ */
|
|
|
+ funcs->mode_set(encoder, mode, adjusted_mode);
|
|
|
+
|
|
|
+ if (encoder->bridge && encoder->bridge->funcs->mode_set)
|
|
|
+ encoder->bridge->funcs->mode_set(encoder->bridge,
|
|
|
+ mode, adjusted_mode);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_commit_pre_planes - modeset commit before plane updates
|
|
|
+ * @dev: DRM device
|
|
|
+ * @state: atomic state
|
|
|
+ *
|
|
|
+ * This function commits the modeset changes that need to be committed before
|
|
|
+ * updating planes. It shuts down all the outputs that need to be shut down and
|
|
|
+ * prepares them (if required) with the new mode.
|
|
|
+ */
|
|
|
+void drm_atomic_helper_commit_pre_planes(struct drm_device *dev,
|
|
|
+ struct drm_atomic_state *state)
|
|
|
+{
|
|
|
+ disable_outputs(dev, state);
|
|
|
+ set_routing_links(dev, state);
|
|
|
+ crtc_set_mode(dev, state);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_commit_pre_planes);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_commit_post_planes - modeset commit after plane updates
|
|
|
+ * @dev: DRM device
|
|
|
+ * @old_state: atomic state object with old state structures
|
|
|
+ *
|
|
|
+ * This function commits the modeset changes that need to be committed after
|
|
|
+ * updating planes: It enables all the outputs with the new configuration which
|
|
|
+ * had to be turned off for the update.
|
|
|
+ */
|
|
|
+void drm_atomic_helper_commit_post_planes(struct drm_device *dev,
|
|
|
+ struct drm_atomic_state *old_state)
|
|
|
+{
|
|
|
+ int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
|
+ int nconnectors = old_state->dev->mode_config.num_connector;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ for (i = 0; i < ncrtcs; i++) {
|
|
|
+ struct drm_crtc_helper_funcs *funcs;
|
|
|
+ struct drm_crtc *crtc;
|
|
|
+
|
|
|
+ crtc = old_state->crtcs[i];
|
|
|
+
|
|
|
+ /* Need to filter out CRTCs where only planes change. */
|
|
|
+ if (!crtc || !crtc->state->mode_changed)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs = crtc->helper_private;
|
|
|
+
|
|
|
+ if (crtc->state->enable)
|
|
|
+ funcs->commit(crtc);
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < nconnectors; i++) {
|
|
|
+ struct drm_connector *connector;
|
|
|
+ struct drm_encoder_helper_funcs *funcs;
|
|
|
+ struct drm_encoder *encoder;
|
|
|
+
|
|
|
+ connector = old_state->connectors[i];
|
|
|
+
|
|
|
+ if (!connector || !connector->state->best_encoder)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ encoder = connector->state->best_encoder;
|
|
|
+ funcs = encoder->helper_private;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Each encoder has at most one connector (since we always steal
|
|
|
+ * it away), so we won't call call enable hooks twice.
|
|
|
+ */
|
|
|
+ if (encoder->bridge)
|
|
|
+ encoder->bridge->funcs->pre_enable(encoder->bridge);
|
|
|
+
|
|
|
+ funcs->commit(encoder);
|
|
|
+
|
|
|
+ if (encoder->bridge)
|
|
|
+ encoder->bridge->funcs->enable(encoder->bridge);
|
|
|
+ }
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_commit_post_planes);
|
|
|
+
|
|
|
+static void wait_for_fences(struct drm_device *dev,
|
|
|
+ struct drm_atomic_state *state)
|
|
|
+{
|
|
|
+ int nplanes = dev->mode_config.num_total_plane;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ for (i = 0; i < nplanes; i++) {
|
|
|
+ struct drm_plane *plane = state->planes[i];
|
|
|
+
|
|
|
+ if (!plane || !plane->state->fence)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ WARN_ON(!plane->state->fb);
|
|
|
+
|
|
|
+ fence_wait(plane->state->fence, false);
|
|
|
+ fence_put(plane->state->fence);
|
|
|
+ plane->state->fence = NULL;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void
|
|
|
+wait_for_vblanks(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
|
+{
|
|
|
+ struct drm_crtc *crtc;
|
|
|
+ struct drm_crtc_state *old_crtc_state;
|
|
|
+ int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
|
+ int i, ret;
|
|
|
+
|
|
|
+ for (i = 0; i < ncrtcs; i++) {
|
|
|
+ crtc = old_state->crtcs[i];
|
|
|
+ old_crtc_state = old_state->crtc_states[i];
|
|
|
+
|
|
|
+ if (!crtc)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ /* No one cares about the old state, so abuse it for tracking
|
|
|
+ * and store whether we hold a vblank reference (and should do a
|
|
|
+ * vblank wait) in the ->enable boolean. */
|
|
|
+ old_crtc_state->enable = false;
|
|
|
+
|
|
|
+ if (!crtc->state->enable)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ ret = drm_crtc_vblank_get(crtc);
|
|
|
+ if (ret != 0)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ old_crtc_state->enable = true;
|
|
|
+ old_crtc_state->last_vblank_count = drm_vblank_count(dev, i);
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < ncrtcs; i++) {
|
|
|
+ crtc = old_state->crtcs[i];
|
|
|
+ old_crtc_state = old_state->crtc_states[i];
|
|
|
+
|
|
|
+ if (!crtc || !old_crtc_state->enable)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ ret = wait_event_timeout(dev->vblank[i].queue,
|
|
|
+ old_crtc_state->last_vblank_count !=
|
|
|
+ drm_vblank_count(dev, i),
|
|
|
+ msecs_to_jiffies(50));
|
|
|
+
|
|
|
+ drm_crtc_vblank_put(crtc);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_commit - commit validated state object
|
|
|
+ * @dev: DRM device
|
|
|
+ * @state: the driver state object
|
|
|
+ * @async: asynchronous commit
|
|
|
+ *
|
|
|
+ * This function commits a with drm_atomic_helper_check() pre-validated state
|
|
|
+ * object. This can still fail when e.g. the framebuffer reservation fails. For
|
|
|
+ * now this doesn't implement asynchronous commits.
|
|
|
+ *
|
|
|
+ * RETURNS
|
|
|
+ * Zero for success or -errno.
|
|
|
+ */
|
|
|
+int drm_atomic_helper_commit(struct drm_device *dev,
|
|
|
+ struct drm_atomic_state *state,
|
|
|
+ bool async)
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ if (async)
|
|
|
+ return -EBUSY;
|
|
|
+
|
|
|
+ ret = drm_atomic_helper_prepare_planes(dev, state);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * This is the point of no return - everything below never fails except
|
|
|
+ * when the hw goes bonghits. Which means we can commit the new state on
|
|
|
+ * the software side now.
|
|
|
+ */
|
|
|
+
|
|
|
+ drm_atomic_helper_swap_state(dev, state);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Everything below can be run asynchronously without the need to grab
|
|
|
+ * any modeset locks at all under one conditions: It must be guaranteed
|
|
|
+ * that the asynchronous work has either been cancelled (if the driver
|
|
|
+ * supports it, which at least requires that the framebuffers get
|
|
|
+ * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
|
|
|
+ * before the new state gets committed on the software side with
|
|
|
+ * drm_atomic_helper_swap_state().
|
|
|
+ *
|
|
|
+ * This scheme allows new atomic state updates to be prepared and
|
|
|
+ * checked in parallel to the asynchronous completion of the previous
|
|
|
+ * update. Which is important since compositors need to figure out the
|
|
|
+ * composition of the next frame right after having submitted the
|
|
|
+ * current layout.
|
|
|
+ */
|
|
|
+
|
|
|
+ wait_for_fences(dev, state);
|
|
|
+
|
|
|
+ drm_atomic_helper_commit_pre_planes(dev, state);
|
|
|
+
|
|
|
+ drm_atomic_helper_commit_planes(dev, state);
|
|
|
+
|
|
|
+ drm_atomic_helper_commit_post_planes(dev, state);
|
|
|
+
|
|
|
+ wait_for_vblanks(dev, state);
|
|
|
+
|
|
|
+ drm_atomic_helper_cleanup_planes(dev, state);
|
|
|
+
|
|
|
+ drm_atomic_state_free(state);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_commit);
|
|
|
+
|
|
|
+/**
|
|
|
+ * DOC: implementing async commit
|
|
|
+ *
|
|
|
+ * For now the atomic helpers don't support async commit directly. If there is
|
|
|
+ * real need it could be added though, using the dma-buf fence infrastructure
|
|
|
+ * for generic synchronization with outstanding rendering.
|
|
|
+ *
|
|
|
+ * For now drivers have to implement async commit themselves, with the following
|
|
|
+ * sequence being the recommended one:
|
|
|
+ *
|
|
|
+ * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function
|
|
|
+ * which commit needs to call which can fail, so we want to run it first and
|
|
|
+ * synchronously.
|
|
|
+ *
|
|
|
+ * 2. Synchronize with any outstanding asynchronous commit worker threads which
|
|
|
+ * might be affected the new state update. This can be done by either cancelling
|
|
|
+ * or flushing the work items, depending upon whether the driver can deal with
|
|
|
+ * cancelled updates. Note that it is important to ensure that the framebuffer
|
|
|
+ * cleanup is still done when cancelling.
|
|
|
+ *
|
|
|
+ * For sufficient parallelism it is recommended to have a work item per crtc
|
|
|
+ * (for updates which don't touch global state) and a global one. Then we only
|
|
|
+ * need to synchronize with the crtc work items for changed crtcs and the global
|
|
|
+ * work item, which allows nice concurrent updates on disjoint sets of crtcs.
|
|
|
+ *
|
|
|
+ * 3. The software state is updated synchronously with
|
|
|
+ * drm_atomic_helper_swap_state. Doing this under the protection of all modeset
|
|
|
+ * locks means concurrent callers never see inconsistent state. And doing this
|
|
|
+ * while it's guaranteed that no relevant async worker runs means that async
|
|
|
+ * workers do not need grab any locks. Actually they must not grab locks, for
|
|
|
+ * otherwise the work flushing will deadlock.
|
|
|
+ *
|
|
|
+ * 4. Schedule a work item to do all subsequent steps, using the split-out
|
|
|
+ * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and
|
|
|
+ * then cleaning up the framebuffers after the old framebuffer is no longer
|
|
|
+ * being displayed.
|
|
|
+ */
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_prepare_planes - prepare plane resources after commit
|
|
|
+ * @dev: DRM device
|
|
|
+ * @state: atomic state object with old state structures
|
|
|
+ *
|
|
|
+ * This function prepares plane state, specifically framebuffers, for the new
|
|
|
+ * configuration. If any failure is encountered this function will call
|
|
|
+ * ->cleanup_fb on any already successfully prepared framebuffer.
|
|
|
+ *
|
|
|
+ * Returns:
|
|
|
+ * 0 on success, negative error code on failure.
|
|
|
+ */
|
|
|
+int drm_atomic_helper_prepare_planes(struct drm_device *dev,
|
|
|
+ struct drm_atomic_state *state)
|
|
|
+{
|
|
|
+ int nplanes = dev->mode_config.num_total_plane;
|
|
|
+ int ret, i;
|
|
|
+
|
|
|
+ for (i = 0; i < nplanes; i++) {
|
|
|
+ struct drm_plane_helper_funcs *funcs;
|
|
|
+ struct drm_plane *plane = state->planes[i];
|
|
|
+ struct drm_framebuffer *fb;
|
|
|
+
|
|
|
+ if (!plane)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs = plane->helper_private;
|
|
|
+
|
|
|
+ fb = state->plane_states[i]->fb;
|
|
|
+
|
|
|
+ if (fb && funcs->prepare_fb) {
|
|
|
+ ret = funcs->prepare_fb(plane, fb);
|
|
|
+ if (ret)
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+
|
|
|
+fail:
|
|
|
+ for (i--; i >= 0; i--) {
|
|
|
+ struct drm_plane_helper_funcs *funcs;
|
|
|
+ struct drm_plane *plane = state->planes[i];
|
|
|
+ struct drm_framebuffer *fb;
|
|
|
+
|
|
|
+ if (!plane)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs = plane->helper_private;
|
|
|
+
|
|
|
+ fb = state->plane_states[i]->fb;
|
|
|
+
|
|
|
+ if (fb && funcs->cleanup_fb)
|
|
|
+ funcs->cleanup_fb(plane, fb);
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_prepare_planes);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_commit_planes - commit plane state
|
|
|
+ * @dev: DRM device
|
|
|
+ * @state: atomic state
|
|
|
+ *
|
|
|
+ * This function commits the new plane state using the plane and atomic helper
|
|
|
+ * functions for planes and crtcs. It assumes that the atomic state has already
|
|
|
+ * been pushed into the relevant object state pointers, since this step can no
|
|
|
+ * longer fail.
|
|
|
+ *
|
|
|
+ * It still requires the global state object @state to know which planes and
|
|
|
+ * crtcs need to be updated though.
|
|
|
+ */
|
|
|
+void drm_atomic_helper_commit_planes(struct drm_device *dev,
|
|
|
+ struct drm_atomic_state *state)
|
|
|
+{
|
|
|
+ int nplanes = dev->mode_config.num_total_plane;
|
|
|
+ int ncrtcs = dev->mode_config.num_crtc;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ for (i = 0; i < ncrtcs; i++) {
|
|
|
+ struct drm_crtc_helper_funcs *funcs;
|
|
|
+ struct drm_crtc *crtc = state->crtcs[i];
|
|
|
+
|
|
|
+ if (!crtc)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs = crtc->helper_private;
|
|
|
+
|
|
|
+ if (!funcs || !funcs->atomic_begin)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs->atomic_begin(crtc);
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < nplanes; i++) {
|
|
|
+ struct drm_plane_helper_funcs *funcs;
|
|
|
+ struct drm_plane *plane = state->planes[i];
|
|
|
+
|
|
|
+ if (!plane)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs = plane->helper_private;
|
|
|
+
|
|
|
+ if (!funcs || !funcs->atomic_update)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs->atomic_update(plane);
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < ncrtcs; i++) {
|
|
|
+ struct drm_crtc_helper_funcs *funcs;
|
|
|
+ struct drm_crtc *crtc = state->crtcs[i];
|
|
|
+
|
|
|
+ if (!crtc)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs = crtc->helper_private;
|
|
|
+
|
|
|
+ if (!funcs || !funcs->atomic_flush)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs->atomic_flush(crtc);
|
|
|
+ }
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_commit_planes);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit
|
|
|
+ * @dev: DRM device
|
|
|
+ * @old_state: atomic state object with old state structures
|
|
|
+ *
|
|
|
+ * This function cleans up plane state, specifically framebuffers, from the old
|
|
|
+ * configuration. Hence the old configuration must be perserved in @old_state to
|
|
|
+ * be able to call this function.
|
|
|
+ *
|
|
|
+ * This function must also be called on the new state when the atomic update
|
|
|
+ * fails at any point after calling drm_atomic_helper_prepare_planes().
|
|
|
+ */
|
|
|
+void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
|
|
|
+ struct drm_atomic_state *old_state)
|
|
|
+{
|
|
|
+ int nplanes = dev->mode_config.num_total_plane;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ for (i = 0; i < nplanes; i++) {
|
|
|
+ struct drm_plane_helper_funcs *funcs;
|
|
|
+ struct drm_plane *plane = old_state->planes[i];
|
|
|
+ struct drm_framebuffer *old_fb;
|
|
|
+
|
|
|
+ if (!plane)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ funcs = plane->helper_private;
|
|
|
+
|
|
|
+ old_fb = old_state->plane_states[i]->fb;
|
|
|
+
|
|
|
+ if (old_fb && funcs->cleanup_fb)
|
|
|
+ funcs->cleanup_fb(plane, old_fb);
|
|
|
+ }
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_swap_state - store atomic state into current sw state
|
|
|
+ * @dev: DRM device
|
|
|
+ * @state: atomic state
|
|
|
+ *
|
|
|
+ * This function stores the atomic state into the current state pointers in all
|
|
|
+ * driver objects. It should be called after all failing steps have been done
|
|
|
+ * and succeeded, but before the actual hardware state is committed.
|
|
|
+ *
|
|
|
+ * For cleanup and error recovery the current state for all changed objects will
|
|
|
+ * be swaped into @state.
|
|
|
+ *
|
|
|
+ * With that sequence it fits perfectly into the plane prepare/cleanup sequence:
|
|
|
+ *
|
|
|
+ * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state.
|
|
|
+ *
|
|
|
+ * 2. Do any other steps that might fail.
|
|
|
+ *
|
|
|
+ * 3. Put the staged state into the current state pointers with this function.
|
|
|
+ *
|
|
|
+ * 4. Actually commit the hardware state.
|
|
|
+ *
|
|
|
+ * 5. Call drm_atomic_helper_cleanup_planes with @state, which since step 3
|
|
|
+ * contains the old state. Also do any other cleanup required with that state.
|
|
|
+ */
|
|
|
+void drm_atomic_helper_swap_state(struct drm_device *dev,
|
|
|
+ struct drm_atomic_state *state)
|
|
|
+{
|
|
|
+ int i;
|
|
|
+
|
|
|
+ for (i = 0; i < dev->mode_config.num_connector; i++) {
|
|
|
+ struct drm_connector *connector = state->connectors[i];
|
|
|
+
|
|
|
+ if (!connector)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ connector->state->state = state;
|
|
|
+ swap(state->connector_states[i], connector->state);
|
|
|
+ connector->state->state = NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < dev->mode_config.num_crtc; i++) {
|
|
|
+ struct drm_crtc *crtc = state->crtcs[i];
|
|
|
+
|
|
|
+ if (!crtc)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ crtc->state->state = state;
|
|
|
+ swap(state->crtc_states[i], crtc->state);
|
|
|
+ crtc->state->state = NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < dev->mode_config.num_total_plane; i++) {
|
|
|
+ struct drm_plane *plane = state->planes[i];
|
|
|
+
|
|
|
+ if (!plane)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ plane->state->state = state;
|
|
|
+ swap(state->plane_states[i], plane->state);
|
|
|
+ plane->state->state = NULL;
|
|
|
+ }
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_swap_state);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_update_plane - Helper for primary plane update using atomic
|
|
|
+ * @plane: plane object to update
|
|
|
+ * @crtc: owning CRTC of owning plane
|
|
|
+ * @fb: framebuffer to flip onto plane
|
|
|
+ * @crtc_x: x offset of primary plane on crtc
|
|
|
+ * @crtc_y: y offset of primary plane on crtc
|
|
|
+ * @crtc_w: width of primary plane rectangle on crtc
|
|
|
+ * @crtc_h: height of primary plane rectangle on crtc
|
|
|
+ * @src_x: x offset of @fb for panning
|
|
|
+ * @src_y: y offset of @fb for panning
|
|
|
+ * @src_w: width of source rectangle in @fb
|
|
|
+ * @src_h: height of source rectangle in @fb
|
|
|
+ *
|
|
|
+ * Provides a default plane update handler using the atomic driver interface.
|
|
|
+ *
|
|
|
+ * RETURNS:
|
|
|
+ * Zero on success, error code on failure
|
|
|
+ */
|
|
|
+int drm_atomic_helper_update_plane(struct drm_plane *plane,
|
|
|
+ struct drm_crtc *crtc,
|
|
|
+ struct drm_framebuffer *fb,
|
|
|
+ int crtc_x, int crtc_y,
|
|
|
+ unsigned int crtc_w, unsigned int crtc_h,
|
|
|
+ uint32_t src_x, uint32_t src_y,
|
|
|
+ uint32_t src_w, uint32_t src_h)
|
|
|
+{
|
|
|
+ struct drm_atomic_state *state;
|
|
|
+ struct drm_plane_state *plane_state;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ state = drm_atomic_state_alloc(plane->dev);
|
|
|
+ if (!state)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
|
|
|
+retry:
|
|
|
+ plane_state = drm_atomic_get_plane_state(state, plane);
|
|
|
+ if (IS_ERR(plane_state)) {
|
|
|
+ ret = PTR_ERR(plane_state);
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
|
|
|
+ if (ret != 0)
|
|
|
+ goto fail;
|
|
|
+ drm_atomic_set_fb_for_plane(plane_state, fb);
|
|
|
+ plane_state->crtc_x = crtc_x;
|
|
|
+ plane_state->crtc_y = crtc_y;
|
|
|
+ plane_state->crtc_h = crtc_h;
|
|
|
+ plane_state->crtc_w = crtc_w;
|
|
|
+ plane_state->src_x = src_x;
|
|
|
+ plane_state->src_y = src_y;
|
|
|
+ plane_state->src_h = src_h;
|
|
|
+ plane_state->src_w = src_w;
|
|
|
+
|
|
|
+ ret = drm_atomic_commit(state);
|
|
|
+ if (ret != 0)
|
|
|
+ goto fail;
|
|
|
+
|
|
|
+ /* Driver takes ownership of state on successful commit. */
|
|
|
+ return 0;
|
|
|
+fail:
|
|
|
+ if (ret == -EDEADLK)
|
|
|
+ goto backoff;
|
|
|
+
|
|
|
+ drm_atomic_state_free(state);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+backoff:
|
|
|
+ drm_atomic_legacy_backoff(state);
|
|
|
+ drm_atomic_state_clear(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;
|
|
|
+
|
|
|
+ state = drm_atomic_state_alloc(plane->dev);
|
|
|
+ if (!state)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc);
|
|
|
+retry:
|
|
|
+ plane_state = drm_atomic_get_plane_state(state, plane);
|
|
|
+ if (IS_ERR(plane_state)) {
|
|
|
+ ret = PTR_ERR(plane_state);
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
|
|
|
+ if (ret != 0)
|
|
|
+ goto fail;
|
|
|
+ drm_atomic_set_fb_for_plane(plane_state, NULL);
|
|
|
+ plane_state->crtc_x = 0;
|
|
|
+ plane_state->crtc_y = 0;
|
|
|
+ plane_state->crtc_h = 0;
|
|
|
+ plane_state->crtc_w = 0;
|
|
|
+ plane_state->src_x = 0;
|
|
|
+ plane_state->src_y = 0;
|
|
|
+ plane_state->src_h = 0;
|
|
|
+ plane_state->src_w = 0;
|
|
|
+
|
|
|
+ ret = drm_atomic_commit(state);
|
|
|
+ if (ret != 0)
|
|
|
+ goto fail;
|
|
|
+
|
|
|
+ /* Driver takes ownership of state on successful commit. */
|
|
|
+ return 0;
|
|
|
+fail:
|
|
|
+ if (ret == -EDEADLK)
|
|
|
+ goto backoff;
|
|
|
+
|
|
|
+ drm_atomic_state_free(state);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+backoff:
|
|
|
+ drm_atomic_legacy_backoff(state);
|
|
|
+ drm_atomic_state_clear(state);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Someone might have exchanged the framebuffer while we dropped locks
|
|
|
+ * in the backoff code. We need to fix up the fb refcount tracking the
|
|
|
+ * core does for us.
|
|
|
+ */
|
|
|
+ plane->old_fb = plane->fb;
|
|
|
+
|
|
|
+ goto retry;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_disable_plane);
|
|
|
+
|
|
|
+static int update_output_state(struct drm_atomic_state *state,
|
|
|
+ struct drm_mode_set *set)
|
|
|
+{
|
|
|
+ struct drm_device *dev = set->crtc->dev;
|
|
|
+ struct drm_connector_state *conn_state;
|
|
|
+ int nconnectors = state->dev->mode_config.num_connector;
|
|
|
+ int ncrtcs = state->dev->mode_config.num_crtc;
|
|
|
+ int ret, i, j;
|
|
|
+
|
|
|
+ ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
|
|
|
+ state->acquire_ctx);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ /* First grab all affected connector/crtc states. */
|
|
|
+ for (i = 0; i < set->num_connectors; i++) {
|
|
|
+ conn_state = drm_atomic_get_connector_state(state,
|
|
|
+ set->connectors[i]);
|
|
|
+ if (IS_ERR(conn_state))
|
|
|
+ return PTR_ERR(conn_state);
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < ncrtcs; i++) {
|
|
|
+ struct drm_crtc *crtc = state->crtcs[i];
|
|
|
+
|
|
|
+ if (!crtc)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ ret = drm_atomic_add_affected_connectors(state, crtc);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Then recompute connector->crtc links and crtc enabling state. */
|
|
|
+ for (i = 0; i < nconnectors; i++) {
|
|
|
+ struct drm_connector *connector;
|
|
|
+
|
|
|
+ connector = state->connectors[i];
|
|
|
+ conn_state = state->connector_states[i];
|
|
|
+
|
|
|
+ if (!connector)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ if (conn_state->crtc == set->crtc) {
|
|
|
+ ret = drm_atomic_set_crtc_for_connector(conn_state,
|
|
|
+ NULL);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ for (j = 0; j < set->num_connectors; j++) {
|
|
|
+ if (set->connectors[j] == connector) {
|
|
|
+ ret = drm_atomic_set_crtc_for_connector(conn_state,
|
|
|
+ set->crtc);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < ncrtcs; i++) {
|
|
|
+ struct drm_crtc *crtc = state->crtcs[i];
|
|
|
+ struct drm_crtc_state *crtc_state = state->crtc_states[i];
|
|
|
+
|
|
|
+ if (!crtc)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ /* Don't update ->enable for the CRTC in the set_config request,
|
|
|
+ * since a mismatch would indicate a bug in the upper layers.
|
|
|
+ * The actual modeset code later on will catch any
|
|
|
+ * inconsistencies here. */
|
|
|
+ if (crtc == set->crtc)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ crtc_state->enable =
|
|
|
+ drm_atomic_connectors_for_crtc(state, crtc);
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_set_config - set a new config from userspace
|
|
|
+ * @set: mode set configuration
|
|
|
+ *
|
|
|
+ * Provides a default crtc set_config handler using the atomic driver interface.
|
|
|
+ *
|
|
|
+ * Returns:
|
|
|
+ * Returns 0 on success, negative errno numbers on failure.
|
|
|
+ */
|
|
|
+int drm_atomic_helper_set_config(struct drm_mode_set *set)
|
|
|
+{
|
|
|
+ struct drm_atomic_state *state;
|
|
|
+ struct drm_crtc *crtc = set->crtc;
|
|
|
+ struct drm_crtc_state *crtc_state;
|
|
|
+ struct drm_plane_state *primary_state;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ state = drm_atomic_state_alloc(crtc->dev);
|
|
|
+ if (!state)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
|
|
|
+retry:
|
|
|
+ crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
|
+ if (IS_ERR(crtc_state)) {
|
|
|
+ ret = PTR_ERR(crtc_state);
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!set->mode) {
|
|
|
+ WARN_ON(set->fb);
|
|
|
+ WARN_ON(set->num_connectors);
|
|
|
+
|
|
|
+ crtc_state->enable = false;
|
|
|
+ goto commit;
|
|
|
+ }
|
|
|
+
|
|
|
+ WARN_ON(!set->fb);
|
|
|
+ WARN_ON(!set->num_connectors);
|
|
|
+
|
|
|
+ crtc_state->enable = true;
|
|
|
+ drm_mode_copy(&crtc_state->mode, set->mode);
|
|
|
+
|
|
|
+ primary_state = drm_atomic_get_plane_state(state, crtc->primary);
|
|
|
+ if (IS_ERR(primary_state)) {
|
|
|
+ ret = PTR_ERR(primary_state);
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
|
|
|
+ if (ret != 0)
|
|
|
+ goto fail;
|
|
|
+ drm_atomic_set_fb_for_plane(primary_state, set->fb);
|
|
|
+ primary_state->crtc_x = 0;
|
|
|
+ primary_state->crtc_y = 0;
|
|
|
+ primary_state->crtc_h = set->mode->vdisplay;
|
|
|
+ primary_state->crtc_w = set->mode->hdisplay;
|
|
|
+ primary_state->src_x = set->x << 16;
|
|
|
+ primary_state->src_y = set->y << 16;
|
|
|
+ primary_state->src_h = set->mode->vdisplay << 16;
|
|
|
+ primary_state->src_w = set->mode->hdisplay << 16;
|
|
|
+
|
|
|
+commit:
|
|
|
+ ret = update_output_state(state, set);
|
|
|
+ if (ret)
|
|
|
+ goto fail;
|
|
|
+
|
|
|
+ ret = drm_atomic_commit(state);
|
|
|
+ if (ret != 0)
|
|
|
+ goto fail;
|
|
|
+
|
|
|
+ /* Driver takes ownership of state on successful commit. */
|
|
|
+ return 0;
|
|
|
+fail:
|
|
|
+ if (ret == -EDEADLK)
|
|
|
+ goto backoff;
|
|
|
+
|
|
|
+ drm_atomic_state_free(state);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+backoff:
|
|
|
+ drm_atomic_legacy_backoff(state);
|
|
|
+ drm_atomic_state_clear(state);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Someone might have exchanged the framebuffer while we dropped locks
|
|
|
+ * in the backoff code. We need to fix up the fb refcount tracking the
|
|
|
+ * core does for us.
|
|
|
+ */
|
|
|
+ crtc->primary->old_fb = crtc->primary->fb;
|
|
|
+
|
|
|
+ goto retry;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_set_config);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_crtc_set_property - helper for crtc prorties
|
|
|
+ * @crtc: DRM crtc
|
|
|
+ * @property: DRM property
|
|
|
+ * @val: value of property
|
|
|
+ *
|
|
|
+ * Provides a default plane disablle handler using the atomic driver interface.
|
|
|
+ *
|
|
|
+ * RETURNS:
|
|
|
+ * Zero on success, error code on failure
|
|
|
+ */
|
|
|
+int
|
|
|
+drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
|
|
|
+ struct drm_property *property,
|
|
|
+ uint64_t val)
|
|
|
+{
|
|
|
+ struct drm_atomic_state *state;
|
|
|
+ struct drm_crtc_state *crtc_state;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ state = drm_atomic_state_alloc(crtc->dev);
|
|
|
+ if (!state)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ /* ->set_property is always called with all locks held. */
|
|
|
+ state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
|
|
|
+retry:
|
|
|
+ crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
|
+ if (IS_ERR(crtc_state)) {
|
|
|
+ ret = PTR_ERR(crtc_state);
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = crtc->funcs->atomic_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_legacy_backoff(state);
|
|
|
+ drm_atomic_state_clear(state);
|
|
|
+
|
|
|
+ goto retry;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_plane_set_property - helper for plane prorties
|
|
|
+ * @plane: DRM plane
|
|
|
+ * @property: DRM property
|
|
|
+ * @val: value of property
|
|
|
+ *
|
|
|
+ * Provides a default plane disable handler using the atomic driver interface.
|
|
|
+ *
|
|
|
+ * RETURNS:
|
|
|
+ * Zero on success, error code on failure
|
|
|
+ */
|
|
|
+int
|
|
|
+drm_atomic_helper_plane_set_property(struct drm_plane *plane,
|
|
|
+ struct drm_property *property,
|
|
|
+ uint64_t val)
|
|
|
+{
|
|
|
+ struct drm_atomic_state *state;
|
|
|
+ struct drm_plane_state *plane_state;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ state = drm_atomic_state_alloc(plane->dev);
|
|
|
+ if (!state)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ /* ->set_property is always called with all locks held. */
|
|
|
+ state->acquire_ctx = plane->dev->mode_config.acquire_ctx;
|
|
|
+retry:
|
|
|
+ plane_state = drm_atomic_get_plane_state(state, plane);
|
|
|
+ if (IS_ERR(plane_state)) {
|
|
|
+ ret = PTR_ERR(plane_state);
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = plane->funcs->atomic_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_legacy_backoff(state);
|
|
|
+ drm_atomic_state_clear(state);
|
|
|
+
|
|
|
+ goto retry;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_plane_set_property);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_connector_set_property - helper for connector prorties
|
|
|
+ * @connector: DRM connector
|
|
|
+ * @property: DRM property
|
|
|
+ * @val: value of property
|
|
|
+ *
|
|
|
+ * Provides a default plane disablle handler using the atomic driver interface.
|
|
|
+ *
|
|
|
+ * RETURNS:
|
|
|
+ * Zero on success, error code on failure
|
|
|
+ */
|
|
|
+int
|
|
|
+drm_atomic_helper_connector_set_property(struct drm_connector *connector,
|
|
|
+ struct drm_property *property,
|
|
|
+ uint64_t val)
|
|
|
+{
|
|
|
+ struct drm_atomic_state *state;
|
|
|
+ struct drm_connector_state *connector_state;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ state = drm_atomic_state_alloc(connector->dev);
|
|
|
+ if (!state)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ /* ->set_property is always called with all locks held. */
|
|
|
+ state->acquire_ctx = connector->dev->mode_config.acquire_ctx;
|
|
|
+retry:
|
|
|
+ connector_state = drm_atomic_get_connector_state(state, connector);
|
|
|
+ if (IS_ERR(connector_state)) {
|
|
|
+ ret = PTR_ERR(connector_state);
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = connector->funcs->atomic_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_legacy_backoff(state);
|
|
|
+ drm_atomic_state_clear(state);
|
|
|
+
|
|
|
+ goto retry;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_connector_set_property);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_page_flip - execute a legacy page flip
|
|
|
+ * @crtc: DRM crtc
|
|
|
+ * @fb: DRM framebuffer
|
|
|
+ * @event: optional DRM event to signal upon completion
|
|
|
+ * @flags: flip flags for non-vblank sync'ed updates
|
|
|
+ *
|
|
|
+ * Provides a default page flip implementation using the atomic driver interface.
|
|
|
+ *
|
|
|
+ * Note that for now so called async page flips (i.e. updates which are not
|
|
|
+ * synchronized to vblank) are not supported, since the atomic interfaces have
|
|
|
+ * no provisions for this yet.
|
|
|
+ *
|
|
|
+ * Returns:
|
|
|
+ * Returns 0 on success, negative errno numbers on failure.
|
|
|
+ */
|
|
|
+int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
|
|
|
+ struct drm_framebuffer *fb,
|
|
|
+ struct drm_pending_vblank_event *event,
|
|
|
+ uint32_t flags)
|
|
|
+{
|
|
|
+ struct drm_plane *plane = crtc->primary;
|
|
|
+ struct drm_atomic_state *state;
|
|
|
+ struct drm_plane_state *plane_state;
|
|
|
+ struct drm_crtc_state *crtc_state;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ if (flags & DRM_MODE_PAGE_FLIP_ASYNC)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ state = drm_atomic_state_alloc(plane->dev);
|
|
|
+ if (!state)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
|
|
|
+retry:
|
|
|
+ crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
|
+ if (IS_ERR(crtc_state)) {
|
|
|
+ ret = PTR_ERR(crtc_state);
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+ crtc_state->event = event;
|
|
|
+
|
|
|
+ plane_state = drm_atomic_get_plane_state(state, plane);
|
|
|
+ if (IS_ERR(plane_state)) {
|
|
|
+ ret = PTR_ERR(plane_state);
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
|
|
|
+ if (ret != 0)
|
|
|
+ goto fail;
|
|
|
+ drm_atomic_set_fb_for_plane(plane_state, fb);
|
|
|
+
|
|
|
+ ret = drm_atomic_async_commit(state);
|
|
|
+ if (ret != 0)
|
|
|
+ goto fail;
|
|
|
+
|
|
|
+ /* TODO: ->page_flip is the only driver callback where the core
|
|
|
+ * doesn't update plane->fb. For now patch it up here. */
|
|
|
+ plane->fb = plane->state->fb;
|
|
|
+
|
|
|
+ /* Driver takes ownership of state on successful async commit. */
|
|
|
+ return 0;
|
|
|
+fail:
|
|
|
+ if (ret == -EDEADLK)
|
|
|
+ goto backoff;
|
|
|
+
|
|
|
+ drm_atomic_state_free(state);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+backoff:
|
|
|
+ drm_atomic_legacy_backoff(state);
|
|
|
+ drm_atomic_state_clear(state);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Someone might have exchanged the framebuffer while we dropped locks
|
|
|
+ * in the backoff code. We need to fix up the fb refcount tracking the
|
|
|
+ * core does for us.
|
|
|
+ */
|
|
|
+ plane->old_fb = plane->fb;
|
|
|
+
|
|
|
+ goto retry;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_page_flip);
|
|
|
+
|
|
|
+/**
|
|
|
+ * DOC: atomic state reset and initialization
|
|
|
+ *
|
|
|
+ * Both the drm core and the atomic helpers assume that there is always the full
|
|
|
+ * and correct atomic software state for all connectors, CRTCs and planes
|
|
|
+ * available. Which is a bit a problem on driver load and also after system
|
|
|
+ * suspend. One way to solve this is to have a hardware state read-out
|
|
|
+ * infrastructure which reconstructs the full software state (e.g. the i915
|
|
|
+ * driver).
|
|
|
+ *
|
|
|
+ * The simpler solution is to just reset the software state to everything off,
|
|
|
+ * which is easiest to do by calling drm_mode_config_reset(). To facilitate this
|
|
|
+ * the atomic helpers provide default reset implementations for all hooks.
|
|
|
+ */
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs
|
|
|
+ * @crtc: drm CRTC
|
|
|
+ *
|
|
|
+ * Resets the atomic state for @crtc by freeing the state pointer (which might
|
|
|
+ * be NULL, e.g. at driver load time) and allocating a new empty state object.
|
|
|
+ */
|
|
|
+void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc)
|
|
|
+{
|
|
|
+ kfree(crtc->state);
|
|
|
+ crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_crtc_reset);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook
|
|
|
+ * @crtc: drm CRTC
|
|
|
+ *
|
|
|
+ * Default CRTC state duplicate hook for drivers which don't have their own
|
|
|
+ * subclassed CRTC state structure.
|
|
|
+ */
|
|
|
+struct drm_crtc_state *
|
|
|
+drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc)
|
|
|
+{
|
|
|
+ struct drm_crtc_state *state;
|
|
|
+
|
|
|
+ if (WARN_ON(!crtc->state))
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ state = kmemdup(crtc->state, sizeof(*crtc->state), GFP_KERNEL);
|
|
|
+
|
|
|
+ if (state) {
|
|
|
+ state->mode_changed = false;
|
|
|
+ state->planes_changed = false;
|
|
|
+ state->event = NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ return state;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_crtc_destroy_state - default state destroy hook
|
|
|
+ * @crtc: drm CRTC
|
|
|
+ * @state: CRTC state object to release
|
|
|
+ *
|
|
|
+ * Default CRTC state destroy hook for drivers which don't have their own
|
|
|
+ * subclassed CRTC state structure.
|
|
|
+ */
|
|
|
+void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
|
|
|
+ struct drm_crtc_state *state)
|
|
|
+{
|
|
|
+ kfree(state);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_plane_reset - default ->reset hook for planes
|
|
|
+ * @plane: drm plane
|
|
|
+ *
|
|
|
+ * Resets the atomic state for @plane by freeing the state pointer (which might
|
|
|
+ * be NULL, e.g. at driver load time) and allocating a new empty state object.
|
|
|
+ */
|
|
|
+void drm_atomic_helper_plane_reset(struct drm_plane *plane)
|
|
|
+{
|
|
|
+ if (plane->state && plane->state->fb)
|
|
|
+ drm_framebuffer_unreference(plane->state->fb);
|
|
|
+
|
|
|
+ kfree(plane->state);
|
|
|
+ plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_plane_reset);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_plane_duplicate_state - default state duplicate hook
|
|
|
+ * @plane: drm plane
|
|
|
+ *
|
|
|
+ * Default plane state duplicate hook for drivers which don't have their own
|
|
|
+ * subclassed plane state structure.
|
|
|
+ */
|
|
|
+struct drm_plane_state *
|
|
|
+drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane)
|
|
|
+{
|
|
|
+ struct drm_plane_state *state;
|
|
|
+
|
|
|
+ if (WARN_ON(!plane->state))
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ state = kmemdup(plane->state, sizeof(*plane->state), GFP_KERNEL);
|
|
|
+
|
|
|
+ if (state && state->fb)
|
|
|
+ drm_framebuffer_reference(state->fb);
|
|
|
+
|
|
|
+ return state;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_plane_destroy_state - default state destroy hook
|
|
|
+ * @plane: drm plane
|
|
|
+ * @state: plane state object to release
|
|
|
+ *
|
|
|
+ * Default plane state destroy hook for drivers which don't have their own
|
|
|
+ * subclassed plane state structure.
|
|
|
+ */
|
|
|
+void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
|
|
|
+ struct drm_plane_state *state)
|
|
|
+{
|
|
|
+ if (state->fb)
|
|
|
+ drm_framebuffer_unreference(state->fb);
|
|
|
+
|
|
|
+ kfree(state);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_connector_reset - default ->reset hook for connectors
|
|
|
+ * @connector: drm connector
|
|
|
+ *
|
|
|
+ * Resets the atomic state for @connector by freeing the state pointer (which
|
|
|
+ * might be NULL, e.g. at driver load time) and allocating a new empty state
|
|
|
+ * object.
|
|
|
+ */
|
|
|
+void drm_atomic_helper_connector_reset(struct drm_connector *connector)
|
|
|
+{
|
|
|
+ kfree(connector->state);
|
|
|
+ connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_connector_reset);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_connector_duplicate_state - default state duplicate hook
|
|
|
+ * @connector: drm connector
|
|
|
+ *
|
|
|
+ * Default connector state duplicate hook for drivers which don't have their own
|
|
|
+ * subclassed connector state structure.
|
|
|
+ */
|
|
|
+struct drm_connector_state *
|
|
|
+drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector)
|
|
|
+{
|
|
|
+ if (WARN_ON(!connector->state))
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ return kmemdup(connector->state, sizeof(*connector->state), GFP_KERNEL);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state);
|
|
|
+
|
|
|
+/**
|
|
|
+ * drm_atomic_helper_connector_destroy_state - default state destroy hook
|
|
|
+ * @connector: drm connector
|
|
|
+ * @state: connector state object to release
|
|
|
+ *
|
|
|
+ * Default connector state destroy hook for drivers which don't have their own
|
|
|
+ * subclassed connector state structure.
|
|
|
+ */
|
|
|
+void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
|
|
|
+ struct drm_connector_state *state)
|
|
|
+{
|
|
|
+ kfree(state);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state);
|
Daniel Vetter