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- /*
- * Copyright (c) 2016 Intel Corporation
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that copyright
- * notice and this permission notice appear in supporting documentation, and
- * that the name of the copyright holders not be used in advertising or
- * publicity pertaining to distribution of the software without specific,
- * written prior permission. The copyright holders make no representations
- * about the suitability of this software for any purpose. It is provided "as
- * is" without express or implied warranty.
- *
- * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
- * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
- * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
- * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- * OF THIS SOFTWARE.
- */
- #include <drm/drm_connector.h>
- #include <drm/drm_edid.h>
- #include <drm/drm_encoder.h>
- #include <drm/drm_utils.h>
- #include <drm/drm_print.h>
- #include <drm/drm_drv.h>
- #include <drm/drm_file.h>
- #include <drm/drm_sysfs.h>
- #include <linux/uaccess.h>
- #include "drm_crtc_internal.h"
- #include "drm_internal.h"
- /**
- * DOC: overview
- *
- * In DRM connectors are the general abstraction for display sinks, and include
- * also fixed panels or anything else that can display pixels in some form. As
- * opposed to all other KMS objects representing hardware (like CRTC, encoder or
- * plane abstractions) connectors can be hotplugged and unplugged at runtime.
- * Hence they are reference-counted using drm_connector_get() and
- * drm_connector_put().
- *
- * KMS driver must create, initialize, register and attach at a &struct
- * drm_connector for each such sink. The instance is created as other KMS
- * objects and initialized by setting the following fields. The connector is
- * initialized with a call to drm_connector_init() with a pointer to the
- * &struct drm_connector_funcs and a connector type, and then exposed to
- * userspace with a call to drm_connector_register().
- *
- * Connectors must be attached to an encoder to be used. For devices that map
- * connectors to encoders 1:1, the connector should be attached at
- * initialization time with a call to drm_connector_attach_encoder(). The
- * driver must also set the &drm_connector.encoder field to point to the
- * attached encoder.
- *
- * For connectors which are not fixed (like built-in panels) the driver needs to
- * support hotplug notifications. The simplest way to do that is by using the
- * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have
- * hardware support for hotplug interrupts. Connectors with hardware hotplug
- * support can instead use e.g. drm_helper_hpd_irq_event().
- */
- struct drm_conn_prop_enum_list {
- int type;
- const char *name;
- struct ida ida;
- };
- /*
- * Connector and encoder types.
- */
- static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
- { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
- { DRM_MODE_CONNECTOR_VGA, "VGA" },
- { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
- { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
- { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
- { DRM_MODE_CONNECTOR_Composite, "Composite" },
- { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
- { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
- { DRM_MODE_CONNECTOR_Component, "Component" },
- { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
- { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
- { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
- { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
- { DRM_MODE_CONNECTOR_TV, "TV" },
- { DRM_MODE_CONNECTOR_eDP, "eDP" },
- { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
- { DRM_MODE_CONNECTOR_DSI, "DSI" },
- { DRM_MODE_CONNECTOR_DPI, "DPI" },
- { DRM_MODE_CONNECTOR_WRITEBACK, "Writeback" },
- { DRM_MODE_CONNECTOR_SPI, "SPI" },
- };
- void drm_connector_ida_init(void)
- {
- int i;
- for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
- ida_init(&drm_connector_enum_list[i].ida);
- }
- void drm_connector_ida_destroy(void)
- {
- int i;
- for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
- ida_destroy(&drm_connector_enum_list[i].ida);
- }
- /**
- * drm_get_connector_type_name - return a string for connector type
- * @type: The connector type (DRM_MODE_CONNECTOR_*)
- *
- * Returns: the name of the connector type, or NULL if the type is not valid.
- */
- const char *drm_get_connector_type_name(unsigned int type)
- {
- if (type < ARRAY_SIZE(drm_connector_enum_list))
- return drm_connector_enum_list[type].name;
- return NULL;
- }
- EXPORT_SYMBOL(drm_get_connector_type_name);
- /**
- * drm_connector_get_cmdline_mode - reads the user's cmdline mode
- * @connector: connector to query
- *
- * The kernel supports per-connector configuration of its consoles through
- * use of the video= parameter. This function parses that option and
- * extracts the user's specified mode (or enable/disable status) for a
- * particular connector. This is typically only used during the early fbdev
- * setup.
- */
- static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
- {
- struct drm_cmdline_mode *mode = &connector->cmdline_mode;
- char *option = NULL;
- if (fb_get_options(connector->name, &option))
- return;
- if (!drm_mode_parse_command_line_for_connector(option,
- connector,
- mode))
- return;
- if (mode->force) {
- DRM_INFO("forcing %s connector %s\n", connector->name,
- drm_get_connector_force_name(mode->force));
- connector->force = mode->force;
- }
- if (mode->panel_orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) {
- DRM_INFO("cmdline forces connector %s panel_orientation to %d\n",
- connector->name, mode->panel_orientation);
- drm_connector_set_panel_orientation(connector,
- mode->panel_orientation);
- }
- DRM_DEBUG_KMS("cmdline mode for connector %s %s %dx%d@%dHz%s%s%s\n",
- connector->name, mode->name,
- mode->xres, mode->yres,
- mode->refresh_specified ? mode->refresh : 60,
- mode->rb ? " reduced blanking" : "",
- mode->margins ? " with margins" : "",
- mode->interlace ? " interlaced" : "");
- }
- static void drm_connector_free(struct kref *kref)
- {
- struct drm_connector *connector =
- container_of(kref, struct drm_connector, base.refcount);
- struct drm_device *dev = connector->dev;
- drm_mode_object_unregister(dev, &connector->base);
- connector->funcs->destroy(connector);
- }
- void drm_connector_free_work_fn(struct work_struct *work)
- {
- struct drm_connector *connector, *n;
- struct drm_device *dev =
- container_of(work, struct drm_device, mode_config.connector_free_work);
- struct drm_mode_config *config = &dev->mode_config;
- unsigned long flags;
- struct llist_node *freed;
- spin_lock_irqsave(&config->connector_list_lock, flags);
- freed = llist_del_all(&config->connector_free_list);
- spin_unlock_irqrestore(&config->connector_list_lock, flags);
- llist_for_each_entry_safe(connector, n, freed, free_node) {
- drm_mode_object_unregister(dev, &connector->base);
- connector->funcs->destroy(connector);
- }
- }
- /**
- * drm_connector_init - Init a preallocated connector
- * @dev: DRM device
- * @connector: the connector to init
- * @funcs: callbacks for this connector
- * @connector_type: user visible type of the connector
- *
- * Initialises a preallocated connector. Connectors should be
- * subclassed as part of driver connector objects.
- *
- * Returns:
- * Zero on success, error code on failure.
- */
- int drm_connector_init(struct drm_device *dev,
- struct drm_connector *connector,
- const struct drm_connector_funcs *funcs,
- int connector_type)
- {
- struct drm_mode_config *config = &dev->mode_config;
- int ret;
- struct ida *connector_ida =
- &drm_connector_enum_list[connector_type].ida;
- WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
- (!funcs->atomic_destroy_state ||
- !funcs->atomic_duplicate_state));
- ret = __drm_mode_object_add(dev, &connector->base,
- DRM_MODE_OBJECT_CONNECTOR,
- false, drm_connector_free);
- if (ret)
- return ret;
- connector->base.properties = &connector->properties;
- connector->dev = dev;
- connector->funcs = funcs;
- /* connector index is used with 32bit bitmasks */
- ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL);
- if (ret < 0) {
- DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n",
- drm_connector_enum_list[connector_type].name,
- ret);
- goto out_put;
- }
- connector->index = ret;
- ret = 0;
- connector->connector_type = connector_type;
- connector->connector_type_id =
- ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
- if (connector->connector_type_id < 0) {
- ret = connector->connector_type_id;
- goto out_put_id;
- }
- connector->name =
- kasprintf(GFP_KERNEL, "%s-%d",
- drm_connector_enum_list[connector_type].name,
- connector->connector_type_id);
- if (!connector->name) {
- ret = -ENOMEM;
- goto out_put_type_id;
- }
- INIT_LIST_HEAD(&connector->probed_modes);
- INIT_LIST_HEAD(&connector->modes);
- mutex_init(&connector->mutex);
- connector->edid_blob_ptr = NULL;
- connector->epoch_counter = 0;
- connector->tile_blob_ptr = NULL;
- connector->status = connector_status_unknown;
- connector->display_info.panel_orientation =
- DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
- drm_connector_get_cmdline_mode(connector);
- /* We should add connectors at the end to avoid upsetting the connector
- * index too much. */
- spin_lock_irq(&config->connector_list_lock);
- list_add_tail(&connector->head, &config->connector_list);
- config->num_connector++;
- spin_unlock_irq(&config->connector_list_lock);
- if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL &&
- connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
- drm_connector_attach_edid_property(connector);
- drm_object_attach_property(&connector->base,
- config->dpms_property, 0);
- drm_object_attach_property(&connector->base,
- config->link_status_property,
- 0);
- drm_object_attach_property(&connector->base,
- config->non_desktop_property,
- 0);
- drm_object_attach_property(&connector->base,
- config->tile_property,
- 0);
- if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
- drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
- }
- connector->debugfs_entry = NULL;
- out_put_type_id:
- if (ret)
- ida_simple_remove(connector_ida, connector->connector_type_id);
- out_put_id:
- if (ret)
- ida_simple_remove(&config->connector_ida, connector->index);
- out_put:
- if (ret)
- drm_mode_object_unregister(dev, &connector->base);
- return ret;
- }
- EXPORT_SYMBOL(drm_connector_init);
- /**
- * drm_connector_init_with_ddc - Init a preallocated connector
- * @dev: DRM device
- * @connector: the connector to init
- * @funcs: callbacks for this connector
- * @connector_type: user visible type of the connector
- * @ddc: pointer to the associated ddc adapter
- *
- * Initialises a preallocated connector. Connectors should be
- * subclassed as part of driver connector objects.
- *
- * Ensures that the ddc field of the connector is correctly set.
- *
- * Returns:
- * Zero on success, error code on failure.
- */
- int drm_connector_init_with_ddc(struct drm_device *dev,
- struct drm_connector *connector,
- const struct drm_connector_funcs *funcs,
- int connector_type,
- struct i2c_adapter *ddc)
- {
- int ret;
- ret = drm_connector_init(dev, connector, funcs, connector_type);
- if (ret)
- return ret;
- /* provide ddc symlink in sysfs */
- connector->ddc = ddc;
- return ret;
- }
- EXPORT_SYMBOL(drm_connector_init_with_ddc);
- /**
- * drm_connector_attach_edid_property - attach edid property.
- * @connector: the connector
- *
- * Some connector types like DRM_MODE_CONNECTOR_VIRTUAL do not get a
- * edid property attached by default. This function can be used to
- * explicitly enable the edid property in these cases.
- */
- void drm_connector_attach_edid_property(struct drm_connector *connector)
- {
- struct drm_mode_config *config = &connector->dev->mode_config;
- drm_object_attach_property(&connector->base,
- config->edid_property,
- 0);
- }
- EXPORT_SYMBOL(drm_connector_attach_edid_property);
- /**
- * drm_connector_attach_encoder - attach a connector to an encoder
- * @connector: connector to attach
- * @encoder: encoder to attach @connector to
- *
- * This function links up a connector to an encoder. Note that the routing
- * restrictions between encoders and crtcs are exposed to userspace through the
- * possible_clones and possible_crtcs bitmasks.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_connector_attach_encoder(struct drm_connector *connector,
- struct drm_encoder *encoder)
- {
- /*
- * In the past, drivers have attempted to model the static association
- * of connector to encoder in simple connector/encoder devices using a
- * direct assignment of connector->encoder = encoder. This connection
- * is a logical one and the responsibility of the core, so drivers are
- * expected not to mess with this.
- *
- * Note that the error return should've been enough here, but a large
- * majority of drivers ignores the return value, so add in a big WARN
- * to get people's attention.
- */
- if (WARN_ON(connector->encoder))
- return -EINVAL;
- connector->possible_encoders |= drm_encoder_mask(encoder);
- return 0;
- }
- EXPORT_SYMBOL(drm_connector_attach_encoder);
- /**
- * drm_connector_has_possible_encoder - check if the connector and encoder are
- * associated with each other
- * @connector: the connector
- * @encoder: the encoder
- *
- * Returns:
- * True if @encoder is one of the possible encoders for @connector.
- */
- bool drm_connector_has_possible_encoder(struct drm_connector *connector,
- struct drm_encoder *encoder)
- {
- return connector->possible_encoders & drm_encoder_mask(encoder);
- }
- EXPORT_SYMBOL(drm_connector_has_possible_encoder);
- static void drm_mode_remove(struct drm_connector *connector,
- struct drm_display_mode *mode)
- {
- list_del(&mode->head);
- drm_mode_destroy(connector->dev, mode);
- }
- /**
- * drm_connector_cleanup - cleans up an initialised connector
- * @connector: connector to cleanup
- *
- * Cleans up the connector but doesn't free the object.
- */
- void drm_connector_cleanup(struct drm_connector *connector)
- {
- struct drm_device *dev = connector->dev;
- struct drm_display_mode *mode, *t;
- /* The connector should have been removed from userspace long before
- * it is finally destroyed.
- */
- if (WARN_ON(connector->registration_state ==
- DRM_CONNECTOR_REGISTERED))
- drm_connector_unregister(connector);
- if (connector->tile_group) {
- drm_mode_put_tile_group(dev, connector->tile_group);
- connector->tile_group = NULL;
- }
- list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
- drm_mode_remove(connector, mode);
- list_for_each_entry_safe(mode, t, &connector->modes, head)
- drm_mode_remove(connector, mode);
- ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
- connector->connector_type_id);
- ida_simple_remove(&dev->mode_config.connector_ida,
- connector->index);
- kfree(connector->display_info.bus_formats);
- drm_mode_object_unregister(dev, &connector->base);
- kfree(connector->name);
- connector->name = NULL;
- spin_lock_irq(&dev->mode_config.connector_list_lock);
- list_del(&connector->head);
- dev->mode_config.num_connector--;
- spin_unlock_irq(&dev->mode_config.connector_list_lock);
- WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
- if (connector->state && connector->funcs->atomic_destroy_state)
- connector->funcs->atomic_destroy_state(connector,
- connector->state);
- mutex_destroy(&connector->mutex);
- memset(connector, 0, sizeof(*connector));
- }
- EXPORT_SYMBOL(drm_connector_cleanup);
- /**
- * drm_connector_register - register a connector
- * @connector: the connector to register
- *
- * Register userspace interfaces for a connector. Only call this for connectors
- * which can be hotplugged after drm_dev_register() has been called already,
- * e.g. DP MST connectors. All other connectors will be registered automatically
- * when calling drm_dev_register().
- *
- * Returns:
- * Zero on success, error code on failure.
- */
- int drm_connector_register(struct drm_connector *connector)
- {
- int ret = 0;
- if (!connector->dev->registered)
- return 0;
- mutex_lock(&connector->mutex);
- if (connector->registration_state != DRM_CONNECTOR_INITIALIZING)
- goto unlock;
- ret = drm_sysfs_connector_add(connector);
- if (ret)
- goto unlock;
- drm_debugfs_connector_add(connector);
- if (connector->funcs->late_register) {
- ret = connector->funcs->late_register(connector);
- if (ret)
- goto err_debugfs;
- }
- drm_mode_object_register(connector->dev, &connector->base);
- connector->registration_state = DRM_CONNECTOR_REGISTERED;
- /* Let userspace know we have a new connector */
- drm_sysfs_hotplug_event(connector->dev);
- goto unlock;
- err_debugfs:
- drm_debugfs_connector_remove(connector);
- drm_sysfs_connector_remove(connector);
- unlock:
- mutex_unlock(&connector->mutex);
- return ret;
- }
- EXPORT_SYMBOL(drm_connector_register);
- /**
- * drm_connector_unregister - unregister a connector
- * @connector: the connector to unregister
- *
- * Unregister userspace interfaces for a connector. Only call this for
- * connectors which have registered explicitly by calling drm_dev_register(),
- * since connectors are unregistered automatically when drm_dev_unregister() is
- * called.
- */
- void drm_connector_unregister(struct drm_connector *connector)
- {
- mutex_lock(&connector->mutex);
- if (connector->registration_state != DRM_CONNECTOR_REGISTERED) {
- mutex_unlock(&connector->mutex);
- return;
- }
- if (connector->funcs->early_unregister)
- connector->funcs->early_unregister(connector);
- drm_sysfs_connector_remove(connector);
- drm_debugfs_connector_remove(connector);
- connector->registration_state = DRM_CONNECTOR_UNREGISTERED;
- mutex_unlock(&connector->mutex);
- }
- EXPORT_SYMBOL(drm_connector_unregister);
- void drm_connector_unregister_all(struct drm_device *dev)
- {
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter)
- drm_connector_unregister(connector);
- drm_connector_list_iter_end(&conn_iter);
- }
- int drm_connector_register_all(struct drm_device *dev)
- {
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
- int ret = 0;
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
- ret = drm_connector_register(connector);
- if (ret)
- break;
- }
- drm_connector_list_iter_end(&conn_iter);
- if (ret)
- drm_connector_unregister_all(dev);
- return ret;
- }
- /**
- * drm_get_connector_status_name - return a string for connector status
- * @status: connector status to compute name of
- *
- * In contrast to the other drm_get_*_name functions this one here returns a
- * const pointer and hence is threadsafe.
- */
- const char *drm_get_connector_status_name(enum drm_connector_status status)
- {
- if (status == connector_status_connected)
- return "connected";
- else if (status == connector_status_disconnected)
- return "disconnected";
- else
- return "unknown";
- }
- EXPORT_SYMBOL(drm_get_connector_status_name);
- /**
- * drm_get_connector_force_name - return a string for connector force
- * @force: connector force to get name of
- *
- * Returns: const pointer to name.
- */
- const char *drm_get_connector_force_name(enum drm_connector_force force)
- {
- switch (force) {
- case DRM_FORCE_UNSPECIFIED:
- return "unspecified";
- case DRM_FORCE_OFF:
- return "off";
- case DRM_FORCE_ON:
- return "on";
- case DRM_FORCE_ON_DIGITAL:
- return "digital";
- default:
- return "unknown";
- }
- }
- #ifdef CONFIG_LOCKDEP
- static struct lockdep_map connector_list_iter_dep_map = {
- .name = "drm_connector_list_iter"
- };
- #endif
- /**
- * drm_connector_list_iter_begin - initialize a connector_list iterator
- * @dev: DRM device
- * @iter: connector_list iterator
- *
- * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter
- * must always be cleaned up again by calling drm_connector_list_iter_end().
- * Iteration itself happens using drm_connector_list_iter_next() or
- * drm_for_each_connector_iter().
- */
- void drm_connector_list_iter_begin(struct drm_device *dev,
- struct drm_connector_list_iter *iter)
- {
- iter->dev = dev;
- iter->conn = NULL;
- lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_);
- }
- EXPORT_SYMBOL(drm_connector_list_iter_begin);
- /*
- * Extra-safe connector put function that works in any context. Should only be
- * used from the connector_iter functions, where we never really expect to
- * actually release the connector when dropping our final reference.
- */
- static void
- __drm_connector_put_safe(struct drm_connector *conn)
- {
- struct drm_mode_config *config = &conn->dev->mode_config;
- lockdep_assert_held(&config->connector_list_lock);
- if (!refcount_dec_and_test(&conn->base.refcount.refcount))
- return;
- llist_add(&conn->free_node, &config->connector_free_list);
- schedule_work(&config->connector_free_work);
- }
- /**
- * drm_connector_list_iter_next - return next connector
- * @iter: connector_list iterator
- *
- * Returns the next connector for @iter, or NULL when the list walk has
- * completed.
- */
- struct drm_connector *
- drm_connector_list_iter_next(struct drm_connector_list_iter *iter)
- {
- struct drm_connector *old_conn = iter->conn;
- struct drm_mode_config *config = &iter->dev->mode_config;
- struct list_head *lhead;
- unsigned long flags;
- spin_lock_irqsave(&config->connector_list_lock, flags);
- lhead = old_conn ? &old_conn->head : &config->connector_list;
- do {
- if (lhead->next == &config->connector_list) {
- iter->conn = NULL;
- break;
- }
- lhead = lhead->next;
- iter->conn = list_entry(lhead, struct drm_connector, head);
- /* loop until it's not a zombie connector */
- } while (!kref_get_unless_zero(&iter->conn->base.refcount));
- if (old_conn)
- __drm_connector_put_safe(old_conn);
- spin_unlock_irqrestore(&config->connector_list_lock, flags);
- return iter->conn;
- }
- EXPORT_SYMBOL(drm_connector_list_iter_next);
- /**
- * drm_connector_list_iter_end - tear down a connector_list iterator
- * @iter: connector_list iterator
- *
- * Tears down @iter and releases any resources (like &drm_connector references)
- * acquired while walking the list. This must always be called, both when the
- * iteration completes fully or when it was aborted without walking the entire
- * list.
- */
- void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
- {
- struct drm_mode_config *config = &iter->dev->mode_config;
- unsigned long flags;
- iter->dev = NULL;
- if (iter->conn) {
- spin_lock_irqsave(&config->connector_list_lock, flags);
- __drm_connector_put_safe(iter->conn);
- spin_unlock_irqrestore(&config->connector_list_lock, flags);
- }
- lock_release(&connector_list_iter_dep_map, _RET_IP_);
- }
- EXPORT_SYMBOL(drm_connector_list_iter_end);
- static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
- { SubPixelUnknown, "Unknown" },
- { SubPixelHorizontalRGB, "Horizontal RGB" },
- { SubPixelHorizontalBGR, "Horizontal BGR" },
- { SubPixelVerticalRGB, "Vertical RGB" },
- { SubPixelVerticalBGR, "Vertical BGR" },
- { SubPixelNone, "None" },
- };
- /**
- * drm_get_subpixel_order_name - return a string for a given subpixel enum
- * @order: enum of subpixel_order
- *
- * Note you could abuse this and return something out of bounds, but that
- * would be a caller error. No unscrubbed user data should make it here.
- */
- const char *drm_get_subpixel_order_name(enum subpixel_order order)
- {
- return drm_subpixel_enum_list[order].name;
- }
- EXPORT_SYMBOL(drm_get_subpixel_order_name);
- static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
- { DRM_MODE_DPMS_ON, "On" },
- { DRM_MODE_DPMS_STANDBY, "Standby" },
- { DRM_MODE_DPMS_SUSPEND, "Suspend" },
- { DRM_MODE_DPMS_OFF, "Off" }
- };
- DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
- static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
- { DRM_MODE_LINK_STATUS_GOOD, "Good" },
- { DRM_MODE_LINK_STATUS_BAD, "Bad" },
- };
- /**
- * drm_display_info_set_bus_formats - set the supported bus formats
- * @info: display info to store bus formats in
- * @formats: array containing the supported bus formats
- * @num_formats: the number of entries in the fmts array
- *
- * Store the supported bus formats in display info structure.
- * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
- * a full list of available formats.
- */
- int drm_display_info_set_bus_formats(struct drm_display_info *info,
- const u32 *formats,
- unsigned int num_formats)
- {
- u32 *fmts = NULL;
- if (!formats && num_formats)
- return -EINVAL;
- if (formats && num_formats) {
- fmts = kmemdup(formats, sizeof(*formats) * num_formats,
- GFP_KERNEL);
- if (!fmts)
- return -ENOMEM;
- }
- kfree(info->bus_formats);
- info->bus_formats = fmts;
- info->num_bus_formats = num_formats;
- return 0;
- }
- EXPORT_SYMBOL(drm_display_info_set_bus_formats);
- /* Optional connector properties. */
- static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
- { DRM_MODE_SCALE_NONE, "None" },
- { DRM_MODE_SCALE_FULLSCREEN, "Full" },
- { DRM_MODE_SCALE_CENTER, "Center" },
- { DRM_MODE_SCALE_ASPECT, "Full aspect" },
- };
- static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
- { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
- { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
- { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
- };
- static const struct drm_prop_enum_list drm_content_type_enum_list[] = {
- { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" },
- { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" },
- { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" },
- { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" },
- { DRM_MODE_CONTENT_TYPE_GAME, "Game" },
- };
- static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = {
- { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" },
- { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" },
- { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" },
- { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" },
- };
- static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
- { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
- { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
- { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
- };
- DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
- static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
- { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I, TV-out and DP */
- { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
- { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
- };
- DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
- drm_dvi_i_subconnector_enum_list)
- static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
- { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
- { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
- { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
- { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
- { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
- };
- DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
- static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
- { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I, TV-out and DP */
- { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
- { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
- { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
- { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
- };
- DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
- drm_tv_subconnector_enum_list)
- static const struct drm_prop_enum_list drm_dp_subconnector_enum_list[] = {
- { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I, TV-out and DP */
- { DRM_MODE_SUBCONNECTOR_VGA, "VGA" }, /* DP */
- { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DP */
- { DRM_MODE_SUBCONNECTOR_HDMIA, "HDMI" }, /* DP */
- { DRM_MODE_SUBCONNECTOR_DisplayPort, "DP" }, /* DP */
- { DRM_MODE_SUBCONNECTOR_Wireless, "Wireless" }, /* DP */
- { DRM_MODE_SUBCONNECTOR_Native, "Native" }, /* DP */
- };
- DRM_ENUM_NAME_FN(drm_get_dp_subconnector_name,
- drm_dp_subconnector_enum_list)
- static const struct drm_prop_enum_list hdmi_colorspaces[] = {
- /* For Default case, driver will set the colorspace */
- { DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
- /* Standard Definition Colorimetry based on CEA 861 */
- { DRM_MODE_COLORIMETRY_SMPTE_170M_YCC, "SMPTE_170M_YCC" },
- { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" },
- /* Standard Definition Colorimetry based on IEC 61966-2-4 */
- { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" },
- /* High Definition Colorimetry based on IEC 61966-2-4 */
- { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
- /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
- { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" },
- /* Colorimetry based on IEC 61966-2-5 [33] */
- { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" },
- /* Colorimetry based on IEC 61966-2-5 */
- { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
- /* Colorimetry based on ITU-R BT.2020 */
- { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
- /* Colorimetry based on ITU-R BT.2020 */
- { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
- /* Colorimetry based on ITU-R BT.2020 */
- { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
- /* Added as part of Additional Colorimetry Extension in 861.G */
- { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
- { DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-P3_RGB_Theater" },
- };
- /*
- * As per DP 1.4a spec, 2.2.5.7.5 VSC SDP Payload for Pixel Encoding/Colorimetry
- * Format Table 2-120
- */
- static const struct drm_prop_enum_list dp_colorspaces[] = {
- /* For Default case, driver will set the colorspace */
- { DRM_MODE_COLORIMETRY_DEFAULT, "Default" },
- { DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED, "RGB_Wide_Gamut_Fixed_Point" },
- /* Colorimetry based on scRGB (IEC 61966-2-2) */
- { DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT, "RGB_Wide_Gamut_Floating_Point" },
- /* Colorimetry based on IEC 61966-2-5 */
- { DRM_MODE_COLORIMETRY_OPRGB, "opRGB" },
- /* Colorimetry based on SMPTE RP 431-2 */
- { DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" },
- /* Colorimetry based on ITU-R BT.2020 */
- { DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" },
- { DRM_MODE_COLORIMETRY_BT601_YCC, "BT601_YCC" },
- { DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" },
- /* Standard Definition Colorimetry based on IEC 61966-2-4 */
- { DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" },
- /* High Definition Colorimetry based on IEC 61966-2-4 */
- { DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" },
- /* Colorimetry based on IEC 61966-2-1/Amendment 1 */
- { DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" },
- /* Colorimetry based on IEC 61966-2-5 [33] */
- { DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" },
- /* Colorimetry based on ITU-R BT.2020 */
- { DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" },
- /* Colorimetry based on ITU-R BT.2020 */
- { DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" },
- };
- /**
- * DOC: standard connector properties
- *
- * DRM connectors have a few standardized properties:
- *
- * EDID:
- * Blob property which contains the current EDID read from the sink. This
- * is useful to parse sink identification information like vendor, model
- * and serial. Drivers should update this property by calling
- * drm_connector_update_edid_property(), usually after having parsed
- * the EDID using drm_add_edid_modes(). Userspace cannot change this
- * property.
- * DPMS:
- * Legacy property for setting the power state of the connector. For atomic
- * drivers this is only provided for backwards compatibility with existing
- * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the
- * connector is linked to. Drivers should never set this property directly,
- * it is handled by the DRM core by calling the &drm_connector_funcs.dpms
- * callback. For atomic drivers the remapping to the "ACTIVE" property is
- * implemented in the DRM core.
- *
- * Note that this property cannot be set through the MODE_ATOMIC ioctl,
- * userspace must use "ACTIVE" on the CRTC instead.
- *
- * WARNING:
- *
- * For userspace also running on legacy drivers the "DPMS" semantics are a
- * lot more complicated. First, userspace cannot rely on the "DPMS" value
- * returned by the GETCONNECTOR actually reflecting reality, because many
- * drivers fail to update it. For atomic drivers this is taken care of in
- * drm_atomic_helper_update_legacy_modeset_state().
- *
- * The second issue is that the DPMS state is only well-defined when the
- * connector is connected to a CRTC. In atomic the DRM core enforces that
- * "ACTIVE" is off in such a case, no such checks exists for "DPMS".
- *
- * Finally, when enabling an output using the legacy SETCONFIG ioctl then
- * "DPMS" is forced to ON. But see above, that might not be reflected in
- * the software value on legacy drivers.
- *
- * Summarizing: Only set "DPMS" when the connector is known to be enabled,
- * assume that a successful SETCONFIG call also sets "DPMS" to on, and
- * never read back the value of "DPMS" because it can be incorrect.
- * PATH:
- * Connector path property to identify how this sink is physically
- * connected. Used by DP MST. This should be set by calling
- * drm_connector_set_path_property(), in the case of DP MST with the
- * path property the MST manager created. Userspace cannot change this
- * property.
- * TILE:
- * Connector tile group property to indicate how a set of DRM connector
- * compose together into one logical screen. This is used by both high-res
- * external screens (often only using a single cable, but exposing multiple
- * DP MST sinks), or high-res integrated panels (like dual-link DSI) which
- * are not gen-locked. Note that for tiled panels which are genlocked, like
- * dual-link LVDS or dual-link DSI, the driver should try to not expose the
- * tiling and virtualise both &drm_crtc and &drm_plane if needed. Drivers
- * should update this value using drm_connector_set_tile_property().
- * Userspace cannot change this property.
- * link-status:
- * Connector link-status property to indicate the status of link. The
- * default value of link-status is "GOOD". If something fails during or
- * after modeset, the kernel driver may set this to "BAD" and issue a
- * hotplug uevent. Drivers should update this value using
- * drm_connector_set_link_status_property().
- *
- * When user-space receives the hotplug uevent and detects a "BAD"
- * link-status, the sink doesn't receive pixels anymore (e.g. the screen
- * becomes completely black). The list of available modes may have
- * changed. User-space is expected to pick a new mode if the current one
- * has disappeared and perform a new modeset with link-status set to
- * "GOOD" to re-enable the connector.
- *
- * If multiple connectors share the same CRTC and one of them gets a "BAD"
- * link-status, the other are unaffected (ie. the sinks still continue to
- * receive pixels).
- *
- * When user-space performs an atomic commit on a connector with a "BAD"
- * link-status without resetting the property to "GOOD", the sink may
- * still not receive pixels. When user-space performs an atomic commit
- * which resets the link-status property to "GOOD" without the
- * ALLOW_MODESET flag set, it might fail because a modeset is required.
- *
- * User-space can only change link-status to "GOOD", changing it to "BAD"
- * is a no-op.
- *
- * For backwards compatibility with non-atomic userspace the kernel
- * tries to automatically set the link-status back to "GOOD" in the
- * SETCRTC IOCTL. This might fail if the mode is no longer valid, similar
- * to how it might fail if a different screen has been connected in the
- * interim.
- * non_desktop:
- * Indicates the output should be ignored for purposes of displaying a
- * standard desktop environment or console. This is most likely because
- * the output device is not rectilinear.
- * Content Protection:
- * This property is used by userspace to request the kernel protect future
- * content communicated over the link. When requested, kernel will apply
- * the appropriate means of protection (most often HDCP), and use the
- * property to tell userspace the protection is active.
- *
- * Drivers can set this up by calling
- * drm_connector_attach_content_protection_property() on initialization.
- *
- * The value of this property can be one of the following:
- *
- * DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0
- * The link is not protected, content is transmitted in the clear.
- * DRM_MODE_CONTENT_PROTECTION_DESIRED = 1
- * Userspace has requested content protection, but the link is not
- * currently protected. When in this state, kernel should enable
- * Content Protection as soon as possible.
- * DRM_MODE_CONTENT_PROTECTION_ENABLED = 2
- * Userspace has requested content protection, and the link is
- * protected. Only the driver can set the property to this value.
- * If userspace attempts to set to ENABLED, kernel will return
- * -EINVAL.
- *
- * A few guidelines:
- *
- * - DESIRED state should be preserved until userspace de-asserts it by
- * setting the property to UNDESIRED. This means ENABLED should only
- * transition to UNDESIRED when the user explicitly requests it.
- * - If the state is DESIRED, kernel should attempt to re-authenticate the
- * link whenever possible. This includes across disable/enable, dpms,
- * hotplug, downstream device changes, link status failures, etc..
- * - Kernel sends uevent with the connector id and property id through
- * @drm_hdcp_update_content_protection, upon below kernel triggered
- * scenarios:
- *
- * - DESIRED -> ENABLED (authentication success)
- * - ENABLED -> DESIRED (termination of authentication)
- * - Please note no uevents for userspace triggered property state changes,
- * which can't fail such as
- *
- * - DESIRED/ENABLED -> UNDESIRED
- * - UNDESIRED -> DESIRED
- * - Userspace is responsible for polling the property or listen to uevents
- * to determine when the value transitions from ENABLED to DESIRED.
- * This signifies the link is no longer protected and userspace should
- * take appropriate action (whatever that might be).
- *
- * HDCP Content Type:
- * This Enum property is used by the userspace to declare the content type
- * of the display stream, to kernel. Here display stream stands for any
- * display content that userspace intended to display through HDCP
- * encryption.
- *
- * Content Type of a stream is decided by the owner of the stream, as
- * "HDCP Type0" or "HDCP Type1".
- *
- * The value of the property can be one of the below:
- * - "HDCP Type0": DRM_MODE_HDCP_CONTENT_TYPE0 = 0
- * - "HDCP Type1": DRM_MODE_HDCP_CONTENT_TYPE1 = 1
- *
- * When kernel starts the HDCP authentication (see "Content Protection"
- * for details), it uses the content type in "HDCP Content Type"
- * for performing the HDCP authentication with the display sink.
- *
- * Please note in HDCP spec versions, a link can be authenticated with
- * HDCP 2.2 for Content Type 0/Content Type 1. Where as a link can be
- * authenticated with HDCP1.4 only for Content Type 0(though it is implicit
- * in nature. As there is no reference for Content Type in HDCP1.4).
- *
- * HDCP2.2 authentication protocol itself takes the "Content Type" as a
- * parameter, which is a input for the DP HDCP2.2 encryption algo.
- *
- * In case of Type 0 content protection request, kernel driver can choose
- * either of HDCP spec versions 1.4 and 2.2. When HDCP2.2 is used for
- * "HDCP Type 0", a HDCP 2.2 capable repeater in the downstream can send
- * that content to a HDCP 1.4 authenticated HDCP sink (Type0 link).
- * But if the content is classified as "HDCP Type 1", above mentioned
- * HDCP 2.2 repeater wont send the content to the HDCP sink as it can't
- * authenticate the HDCP1.4 capable sink for "HDCP Type 1".
- *
- * Please note userspace can be ignorant of the HDCP versions used by the
- * kernel driver to achieve the "HDCP Content Type".
- *
- * At current scenario, classifying a content as Type 1 ensures that the
- * content will be displayed only through the HDCP2.2 encrypted link.
- *
- * Note that the HDCP Content Type property is introduced at HDCP 2.2, and
- * defaults to type 0. It is only exposed by drivers supporting HDCP 2.2
- * (hence supporting Type 0 and Type 1). Based on how next versions of
- * HDCP specs are defined content Type could be used for higher versions
- * too.
- *
- * If content type is changed when "Content Protection" is not UNDESIRED,
- * then kernel will disable the HDCP and re-enable with new type in the
- * same atomic commit. And when "Content Protection" is ENABLED, it means
- * that link is HDCP authenticated and encrypted, for the transmission of
- * the Type of stream mentioned at "HDCP Content Type".
- *
- * HDR_OUTPUT_METADATA:
- * Connector property to enable userspace to send HDR Metadata to
- * driver. This metadata is based on the composition and blending
- * policies decided by user, taking into account the hardware and
- * sink capabilities. The driver gets this metadata and creates a
- * Dynamic Range and Mastering Infoframe (DRM) in case of HDMI,
- * SDP packet (Non-audio INFOFRAME SDP v1.3) for DP. This is then
- * sent to sink. This notifies the sink of the upcoming frame's Color
- * Encoding and Luminance parameters.
- *
- * Userspace first need to detect the HDR capabilities of sink by
- * reading and parsing the EDID. Details of HDR metadata for HDMI
- * are added in CTA 861.G spec. For DP , its defined in VESA DP
- * Standard v1.4. It needs to then get the metadata information
- * of the video/game/app content which are encoded in HDR (basically
- * using HDR transfer functions). With this information it needs to
- * decide on a blending policy and compose the relevant
- * layers/overlays into a common format. Once this blending is done,
- * userspace will be aware of the metadata of the composed frame to
- * be send to sink. It then uses this property to communicate this
- * metadata to driver which then make a Infoframe packet and sends
- * to sink based on the type of encoder connected.
- *
- * Userspace will be responsible to do Tone mapping operation in case:
- * - Some layers are HDR and others are SDR
- * - HDR layers luminance is not same as sink
- *
- * It will even need to do colorspace conversion and get all layers
- * to one common colorspace for blending. It can use either GL, Media
- * or display engine to get this done based on the capabilities of the
- * associated hardware.
- *
- * Driver expects metadata to be put in &struct hdr_output_metadata
- * structure from userspace. This is received as blob and stored in
- * &drm_connector_state.hdr_output_metadata. It parses EDID and saves the
- * sink metadata in &struct hdr_sink_metadata, as
- * &drm_connector.hdr_sink_metadata. Driver uses
- * drm_hdmi_infoframe_set_hdr_metadata() helper to set the HDR metadata,
- * hdmi_drm_infoframe_pack() to pack the infoframe as per spec, in case of
- * HDMI encoder.
- *
- * max bpc:
- * This range property is used by userspace to limit the bit depth. When
- * used the driver would limit the bpc in accordance with the valid range
- * supported by the hardware and sink. Drivers to use the function
- * drm_connector_attach_max_bpc_property() to create and attach the
- * property to the connector during initialization.
- *
- * Connectors also have one standardized atomic property:
- *
- * CRTC_ID:
- * Mode object ID of the &drm_crtc this connector should be connected to.
- *
- * Connectors for LCD panels may also have one standardized property:
- *
- * panel orientation:
- * On some devices the LCD panel is mounted in the casing in such a way
- * that the up/top side of the panel does not match with the top side of
- * the device. Userspace can use this property to check for this.
- * Note that input coordinates from touchscreens (input devices with
- * INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel
- * coordinates, so if userspace rotates the picture to adjust for
- * the orientation it must also apply the same transformation to the
- * touchscreen input coordinates. This property is initialized by calling
- * drm_connector_set_panel_orientation() or
- * drm_connector_set_panel_orientation_with_quirk()
- *
- * scaling mode:
- * This property defines how a non-native mode is upscaled to the native
- * mode of an LCD panel:
- *
- * None:
- * No upscaling happens, scaling is left to the panel. Not all
- * drivers expose this mode.
- * Full:
- * The output is upscaled to the full resolution of the panel,
- * ignoring the aspect ratio.
- * Center:
- * No upscaling happens, the output is centered within the native
- * resolution the panel.
- * Full aspect:
- * The output is upscaled to maximize either the width or height
- * while retaining the aspect ratio.
- *
- * This property should be set up by calling
- * drm_connector_attach_scaling_mode_property(). Note that drivers
- * can also expose this property to external outputs, in which case they
- * must support "None", which should be the default (since external screens
- * have a built-in scaler).
- *
- * subconnector:
- * This property is used by DVI-I, TVout and DisplayPort to indicate different
- * connector subtypes. Enum values more or less match with those from main
- * connector types.
- * For DVI-I and TVout there is also a matching property "select subconnector"
- * allowing to switch between signal types.
- * DP subconnector corresponds to a downstream port.
- */
- int drm_connector_create_standard_properties(struct drm_device *dev)
- {
- struct drm_property *prop;
- prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
- DRM_MODE_PROP_IMMUTABLE,
- "EDID", 0);
- if (!prop)
- return -ENOMEM;
- dev->mode_config.edid_property = prop;
- prop = drm_property_create_enum(dev, 0,
- "DPMS", drm_dpms_enum_list,
- ARRAY_SIZE(drm_dpms_enum_list));
- if (!prop)
- return -ENOMEM;
- dev->mode_config.dpms_property = prop;
- prop = drm_property_create(dev,
- DRM_MODE_PROP_BLOB |
- DRM_MODE_PROP_IMMUTABLE,
- "PATH", 0);
- if (!prop)
- return -ENOMEM;
- dev->mode_config.path_property = prop;
- prop = drm_property_create(dev,
- DRM_MODE_PROP_BLOB |
- DRM_MODE_PROP_IMMUTABLE,
- "TILE", 0);
- if (!prop)
- return -ENOMEM;
- dev->mode_config.tile_property = prop;
- prop = drm_property_create_enum(dev, 0, "link-status",
- drm_link_status_enum_list,
- ARRAY_SIZE(drm_link_status_enum_list));
- if (!prop)
- return -ENOMEM;
- dev->mode_config.link_status_property = prop;
- prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop");
- if (!prop)
- return -ENOMEM;
- dev->mode_config.non_desktop_property = prop;
- prop = drm_property_create(dev, DRM_MODE_PROP_BLOB,
- "HDR_OUTPUT_METADATA", 0);
- if (!prop)
- return -ENOMEM;
- dev->mode_config.hdr_output_metadata_property = prop;
- return 0;
- }
- /**
- * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
- * @dev: DRM device
- *
- * Called by a driver the first time a DVI-I connector is made.
- */
- int drm_mode_create_dvi_i_properties(struct drm_device *dev)
- {
- struct drm_property *dvi_i_selector;
- struct drm_property *dvi_i_subconnector;
- if (dev->mode_config.dvi_i_select_subconnector_property)
- return 0;
- dvi_i_selector =
- drm_property_create_enum(dev, 0,
- "select subconnector",
- drm_dvi_i_select_enum_list,
- ARRAY_SIZE(drm_dvi_i_select_enum_list));
- dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
- dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
- "subconnector",
- drm_dvi_i_subconnector_enum_list,
- ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
- dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
- return 0;
- }
- EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
- /**
- * drm_connector_attach_dp_subconnector_property - create subconnector property for DP
- * @connector: drm_connector to attach property
- *
- * Called by a driver when DP connector is created.
- */
- void drm_connector_attach_dp_subconnector_property(struct drm_connector *connector)
- {
- struct drm_mode_config *mode_config = &connector->dev->mode_config;
- if (!mode_config->dp_subconnector_property)
- mode_config->dp_subconnector_property =
- drm_property_create_enum(connector->dev,
- DRM_MODE_PROP_IMMUTABLE,
- "subconnector",
- drm_dp_subconnector_enum_list,
- ARRAY_SIZE(drm_dp_subconnector_enum_list));
- drm_object_attach_property(&connector->base,
- mode_config->dp_subconnector_property,
- DRM_MODE_SUBCONNECTOR_Unknown);
- }
- EXPORT_SYMBOL(drm_connector_attach_dp_subconnector_property);
- /**
- * DOC: HDMI connector properties
- *
- * content type (HDMI specific):
- * Indicates content type setting to be used in HDMI infoframes to indicate
- * content type for the external device, so that it adjusts its display
- * settings accordingly.
- *
- * The value of this property can be one of the following:
- *
- * No Data:
- * Content type is unknown
- * Graphics:
- * Content type is graphics
- * Photo:
- * Content type is photo
- * Cinema:
- * Content type is cinema
- * Game:
- * Content type is game
- *
- * Drivers can set up this property by calling
- * drm_connector_attach_content_type_property(). Decoding to
- * infoframe values is done through drm_hdmi_avi_infoframe_content_type().
- */
- /**
- * drm_connector_attach_content_type_property - attach content-type property
- * @connector: connector to attach content type property on.
- *
- * Called by a driver the first time a HDMI connector is made.
- */
- int drm_connector_attach_content_type_property(struct drm_connector *connector)
- {
- if (!drm_mode_create_content_type_property(connector->dev))
- drm_object_attach_property(&connector->base,
- connector->dev->mode_config.content_type_property,
- DRM_MODE_CONTENT_TYPE_NO_DATA);
- return 0;
- }
- EXPORT_SYMBOL(drm_connector_attach_content_type_property);
- /**
- * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe
- * content type information, based
- * on correspondent DRM property.
- * @frame: HDMI AVI infoframe
- * @conn_state: DRM display connector state
- *
- */
- void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,
- const struct drm_connector_state *conn_state)
- {
- switch (conn_state->content_type) {
- case DRM_MODE_CONTENT_TYPE_GRAPHICS:
- frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;
- break;
- case DRM_MODE_CONTENT_TYPE_CINEMA:
- frame->content_type = HDMI_CONTENT_TYPE_CINEMA;
- break;
- case DRM_MODE_CONTENT_TYPE_GAME:
- frame->content_type = HDMI_CONTENT_TYPE_GAME;
- break;
- case DRM_MODE_CONTENT_TYPE_PHOTO:
- frame->content_type = HDMI_CONTENT_TYPE_PHOTO;
- break;
- default:
- /* Graphics is the default(0) */
- frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS;
- }
- frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA;
- }
- EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type);
- /**
- * drm_mode_attach_tv_margin_properties - attach TV connector margin properties
- * @connector: DRM connector
- *
- * Called by a driver when it needs to attach TV margin props to a connector.
- * Typically used on SDTV and HDMI connectors.
- */
- void drm_connector_attach_tv_margin_properties(struct drm_connector *connector)
- {
- struct drm_device *dev = connector->dev;
- drm_object_attach_property(&connector->base,
- dev->mode_config.tv_left_margin_property,
- 0);
- drm_object_attach_property(&connector->base,
- dev->mode_config.tv_right_margin_property,
- 0);
- drm_object_attach_property(&connector->base,
- dev->mode_config.tv_top_margin_property,
- 0);
- drm_object_attach_property(&connector->base,
- dev->mode_config.tv_bottom_margin_property,
- 0);
- }
- EXPORT_SYMBOL(drm_connector_attach_tv_margin_properties);
- /**
- * drm_mode_create_tv_margin_properties - create TV connector margin properties
- * @dev: DRM device
- *
- * Called by a driver's HDMI connector initialization routine, this function
- * creates the TV margin properties for a given device. No need to call this
- * function for an SDTV connector, it's already called from
- * drm_mode_create_tv_properties().
- */
- int drm_mode_create_tv_margin_properties(struct drm_device *dev)
- {
- if (dev->mode_config.tv_left_margin_property)
- return 0;
- dev->mode_config.tv_left_margin_property =
- drm_property_create_range(dev, 0, "left margin", 0, 100);
- if (!dev->mode_config.tv_left_margin_property)
- return -ENOMEM;
- dev->mode_config.tv_right_margin_property =
- drm_property_create_range(dev, 0, "right margin", 0, 100);
- if (!dev->mode_config.tv_right_margin_property)
- return -ENOMEM;
- dev->mode_config.tv_top_margin_property =
- drm_property_create_range(dev, 0, "top margin", 0, 100);
- if (!dev->mode_config.tv_top_margin_property)
- return -ENOMEM;
- dev->mode_config.tv_bottom_margin_property =
- drm_property_create_range(dev, 0, "bottom margin", 0, 100);
- if (!dev->mode_config.tv_bottom_margin_property)
- return -ENOMEM;
- return 0;
- }
- EXPORT_SYMBOL(drm_mode_create_tv_margin_properties);
- /**
- * drm_mode_create_tv_properties - create TV specific connector properties
- * @dev: DRM device
- * @num_modes: number of different TV formats (modes) supported
- * @modes: array of pointers to strings containing name of each format
- *
- * Called by a driver's TV initialization routine, this function creates
- * the TV specific connector properties for a given device. Caller is
- * responsible for allocating a list of format names and passing them to
- * this routine.
- */
- int drm_mode_create_tv_properties(struct drm_device *dev,
- unsigned int num_modes,
- const char * const modes[])
- {
- struct drm_property *tv_selector;
- struct drm_property *tv_subconnector;
- unsigned int i;
- if (dev->mode_config.tv_select_subconnector_property)
- return 0;
- /*
- * Basic connector properties
- */
- tv_selector = drm_property_create_enum(dev, 0,
- "select subconnector",
- drm_tv_select_enum_list,
- ARRAY_SIZE(drm_tv_select_enum_list));
- if (!tv_selector)
- goto nomem;
- dev->mode_config.tv_select_subconnector_property = tv_selector;
- tv_subconnector =
- drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
- "subconnector",
- drm_tv_subconnector_enum_list,
- ARRAY_SIZE(drm_tv_subconnector_enum_list));
- if (!tv_subconnector)
- goto nomem;
- dev->mode_config.tv_subconnector_property = tv_subconnector;
- /*
- * Other, TV specific properties: margins & TV modes.
- */
- if (drm_mode_create_tv_margin_properties(dev))
- goto nomem;
- dev->mode_config.tv_mode_property =
- drm_property_create(dev, DRM_MODE_PROP_ENUM,
- "mode", num_modes);
- if (!dev->mode_config.tv_mode_property)
- goto nomem;
- for (i = 0; i < num_modes; i++)
- drm_property_add_enum(dev->mode_config.tv_mode_property,
- i, modes[i]);
- dev->mode_config.tv_brightness_property =
- drm_property_create_range(dev, 0, "brightness", 0, 100);
- if (!dev->mode_config.tv_brightness_property)
- goto nomem;
- dev->mode_config.tv_contrast_property =
- drm_property_create_range(dev, 0, "contrast", 0, 100);
- if (!dev->mode_config.tv_contrast_property)
- goto nomem;
- dev->mode_config.tv_flicker_reduction_property =
- drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
- if (!dev->mode_config.tv_flicker_reduction_property)
- goto nomem;
- dev->mode_config.tv_overscan_property =
- drm_property_create_range(dev, 0, "overscan", 0, 100);
- if (!dev->mode_config.tv_overscan_property)
- goto nomem;
- dev->mode_config.tv_saturation_property =
- drm_property_create_range(dev, 0, "saturation", 0, 100);
- if (!dev->mode_config.tv_saturation_property)
- goto nomem;
- dev->mode_config.tv_hue_property =
- drm_property_create_range(dev, 0, "hue", 0, 100);
- if (!dev->mode_config.tv_hue_property)
- goto nomem;
- return 0;
- nomem:
- return -ENOMEM;
- }
- EXPORT_SYMBOL(drm_mode_create_tv_properties);
- /**
- * drm_mode_create_scaling_mode_property - create scaling mode property
- * @dev: DRM device
- *
- * Called by a driver the first time it's needed, must be attached to desired
- * connectors.
- *
- * Atomic drivers should use drm_connector_attach_scaling_mode_property()
- * instead to correctly assign &drm_connector_state.picture_aspect_ratio
- * in the atomic state.
- */
- int drm_mode_create_scaling_mode_property(struct drm_device *dev)
- {
- struct drm_property *scaling_mode;
- if (dev->mode_config.scaling_mode_property)
- return 0;
- scaling_mode =
- drm_property_create_enum(dev, 0, "scaling mode",
- drm_scaling_mode_enum_list,
- ARRAY_SIZE(drm_scaling_mode_enum_list));
- dev->mode_config.scaling_mode_property = scaling_mode;
- return 0;
- }
- EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
- /**
- * DOC: Variable refresh properties
- *
- * Variable refresh rate capable displays can dynamically adjust their
- * refresh rate by extending the duration of their vertical front porch
- * until page flip or timeout occurs. This can reduce or remove stuttering
- * and latency in scenarios where the page flip does not align with the
- * vblank interval.
- *
- * An example scenario would be an application flipping at a constant rate
- * of 48Hz on a 60Hz display. The page flip will frequently miss the vblank
- * interval and the same contents will be displayed twice. This can be
- * observed as stuttering for content with motion.
- *
- * If variable refresh rate was active on a display that supported a
- * variable refresh range from 35Hz to 60Hz no stuttering would be observable
- * for the example scenario. The minimum supported variable refresh rate of
- * 35Hz is below the page flip frequency and the vertical front porch can
- * be extended until the page flip occurs. The vblank interval will be
- * directly aligned to the page flip rate.
- *
- * Not all userspace content is suitable for use with variable refresh rate.
- * Large and frequent changes in vertical front porch duration may worsen
- * perceived stuttering for input sensitive applications.
- *
- * Panel brightness will also vary with vertical front porch duration. Some
- * panels may have noticeable differences in brightness between the minimum
- * vertical front porch duration and the maximum vertical front porch duration.
- * Large and frequent changes in vertical front porch duration may produce
- * observable flickering for such panels.
- *
- * Userspace control for variable refresh rate is supported via properties
- * on the &drm_connector and &drm_crtc objects.
- *
- * "vrr_capable":
- * Optional &drm_connector boolean property that drivers should attach
- * with drm_connector_attach_vrr_capable_property() on connectors that
- * could support variable refresh rates. Drivers should update the
- * property value by calling drm_connector_set_vrr_capable_property().
- *
- * Absence of the property should indicate absence of support.
- *
- * "VRR_ENABLED":
- * Default &drm_crtc boolean property that notifies the driver that the
- * content on the CRTC is suitable for variable refresh rate presentation.
- * The driver will take this property as a hint to enable variable
- * refresh rate support if the receiver supports it, ie. if the
- * "vrr_capable" property is true on the &drm_connector object. The
- * vertical front porch duration will be extended until page-flip or
- * timeout when enabled.
- *
- * The minimum vertical front porch duration is defined as the vertical
- * front porch duration for the current mode.
- *
- * The maximum vertical front porch duration is greater than or equal to
- * the minimum vertical front porch duration. The duration is derived
- * from the minimum supported variable refresh rate for the connector.
- *
- * The driver may place further restrictions within these minimum
- * and maximum bounds.
- */
- /**
- * drm_connector_attach_vrr_capable_property - creates the
- * vrr_capable property
- * @connector: connector to create the vrr_capable property on.
- *
- * This is used by atomic drivers to add support for querying
- * variable refresh rate capability for a connector.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_connector_attach_vrr_capable_property(
- struct drm_connector *connector)
- {
- struct drm_device *dev = connector->dev;
- struct drm_property *prop;
- if (!connector->vrr_capable_property) {
- prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE,
- "vrr_capable");
- if (!prop)
- return -ENOMEM;
- connector->vrr_capable_property = prop;
- drm_object_attach_property(&connector->base, prop, 0);
- }
- return 0;
- }
- EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property);
- /**
- * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property
- * @connector: connector to attach scaling mode property on.
- * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*).
- *
- * This is used to add support for scaling mode to atomic drivers.
- * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio
- * and can be used from &drm_connector_helper_funcs->atomic_check for validation.
- *
- * This is the atomic version of drm_mode_create_scaling_mode_property().
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,
- u32 scaling_mode_mask)
- {
- struct drm_device *dev = connector->dev;
- struct drm_property *scaling_mode_property;
- int i;
- const unsigned valid_scaling_mode_mask =
- (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1;
- if (WARN_ON(hweight32(scaling_mode_mask) < 2 ||
- scaling_mode_mask & ~valid_scaling_mode_mask))
- return -EINVAL;
- scaling_mode_property =
- drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
- hweight32(scaling_mode_mask));
- if (!scaling_mode_property)
- return -ENOMEM;
- for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) {
- int ret;
- if (!(BIT(i) & scaling_mode_mask))
- continue;
- ret = drm_property_add_enum(scaling_mode_property,
- drm_scaling_mode_enum_list[i].type,
- drm_scaling_mode_enum_list[i].name);
- if (ret) {
- drm_property_destroy(dev, scaling_mode_property);
- return ret;
- }
- }
- drm_object_attach_property(&connector->base,
- scaling_mode_property, 0);
- connector->scaling_mode_property = scaling_mode_property;
- return 0;
- }
- EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property);
- /**
- * drm_mode_create_aspect_ratio_property - create aspect ratio property
- * @dev: DRM device
- *
- * Called by a driver the first time it's needed, must be attached to desired
- * connectors.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
- {
- if (dev->mode_config.aspect_ratio_property)
- return 0;
- dev->mode_config.aspect_ratio_property =
- drm_property_create_enum(dev, 0, "aspect ratio",
- drm_aspect_ratio_enum_list,
- ARRAY_SIZE(drm_aspect_ratio_enum_list));
- if (dev->mode_config.aspect_ratio_property == NULL)
- return -ENOMEM;
- return 0;
- }
- EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
- /**
- * DOC: standard connector properties
- *
- * Colorspace:
- * This property helps select a suitable colorspace based on the sink
- * capability. Modern sink devices support wider gamut like BT2020.
- * This helps switch to BT2020 mode if the BT2020 encoded video stream
- * is being played by the user, same for any other colorspace. Thereby
- * giving a good visual experience to users.
- *
- * The expectation from userspace is that it should parse the EDID
- * and get supported colorspaces. Use this property and switch to the
- * one supported. Sink supported colorspaces should be retrieved by
- * userspace from EDID and driver will not explicitly expose them.
- *
- * Basically the expectation from userspace is:
- * - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink
- * colorspace
- * - Set this new property to let the sink know what it
- * converted the CRTC output to.
- * - This property is just to inform sink what colorspace
- * source is trying to drive.
- *
- * Because between HDMI and DP have different colorspaces,
- * drm_mode_create_hdmi_colorspace_property() is used for HDMI connector and
- * drm_mode_create_dp_colorspace_property() is used for DP connector.
- */
- /**
- * drm_mode_create_hdmi_colorspace_property - create hdmi colorspace property
- * @connector: connector to create the Colorspace property on.
- *
- * Called by a driver the first time it's needed, must be attached to desired
- * HDMI connectors.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector)
- {
- struct drm_device *dev = connector->dev;
- if (connector->colorspace_property)
- return 0;
- connector->colorspace_property =
- drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace",
- hdmi_colorspaces,
- ARRAY_SIZE(hdmi_colorspaces));
- if (!connector->colorspace_property)
- return -ENOMEM;
- return 0;
- }
- EXPORT_SYMBOL(drm_mode_create_hdmi_colorspace_property);
- /**
- * drm_mode_create_dp_colorspace_property - create dp colorspace property
- * @connector: connector to create the Colorspace property on.
- *
- * Called by a driver the first time it's needed, must be attached to desired
- * DP connectors.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_mode_create_dp_colorspace_property(struct drm_connector *connector)
- {
- struct drm_device *dev = connector->dev;
- if (connector->colorspace_property)
- return 0;
- connector->colorspace_property =
- drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace",
- dp_colorspaces,
- ARRAY_SIZE(dp_colorspaces));
- if (!connector->colorspace_property)
- return -ENOMEM;
- return 0;
- }
- EXPORT_SYMBOL(drm_mode_create_dp_colorspace_property);
- /**
- * drm_mode_create_content_type_property - create content type property
- * @dev: DRM device
- *
- * Called by a driver the first time it's needed, must be attached to desired
- * connectors.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_mode_create_content_type_property(struct drm_device *dev)
- {
- if (dev->mode_config.content_type_property)
- return 0;
- dev->mode_config.content_type_property =
- drm_property_create_enum(dev, 0, "content type",
- drm_content_type_enum_list,
- ARRAY_SIZE(drm_content_type_enum_list));
- if (dev->mode_config.content_type_property == NULL)
- return -ENOMEM;
- return 0;
- }
- EXPORT_SYMBOL(drm_mode_create_content_type_property);
- /**
- * drm_mode_create_suggested_offset_properties - create suggests offset properties
- * @dev: DRM device
- *
- * Create the suggested x/y offset property for connectors.
- */
- int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
- {
- if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
- return 0;
- dev->mode_config.suggested_x_property =
- drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
- dev->mode_config.suggested_y_property =
- drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
- if (dev->mode_config.suggested_x_property == NULL ||
- dev->mode_config.suggested_y_property == NULL)
- return -ENOMEM;
- return 0;
- }
- EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
- /**
- * drm_connector_set_path_property - set tile property on connector
- * @connector: connector to set property on.
- * @path: path to use for property; must not be NULL.
- *
- * This creates a property to expose to userspace to specify a
- * connector path. This is mainly used for DisplayPort MST where
- * connectors have a topology and we want to allow userspace to give
- * them more meaningful names.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_connector_set_path_property(struct drm_connector *connector,
- const char *path)
- {
- struct drm_device *dev = connector->dev;
- int ret;
- ret = drm_property_replace_global_blob(dev,
- &connector->path_blob_ptr,
- strlen(path) + 1,
- path,
- &connector->base,
- dev->mode_config.path_property);
- return ret;
- }
- EXPORT_SYMBOL(drm_connector_set_path_property);
- /**
- * drm_connector_set_tile_property - set tile property on connector
- * @connector: connector to set property on.
- *
- * This looks up the tile information for a connector, and creates a
- * property for userspace to parse if it exists. The property is of
- * the form of 8 integers using ':' as a separator.
- * This is used for dual port tiled displays with DisplayPort SST
- * or DisplayPort MST connectors.
- *
- * Returns:
- * Zero on success, errno on failure.
- */
- int drm_connector_set_tile_property(struct drm_connector *connector)
- {
- struct drm_device *dev = connector->dev;
- char tile[256];
- int ret;
- if (!connector->has_tile) {
- ret = drm_property_replace_global_blob(dev,
- &connector->tile_blob_ptr,
- 0,
- NULL,
- &connector->base,
- dev->mode_config.tile_property);
- return ret;
- }
- snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
- connector->tile_group->id, connector->tile_is_single_monitor,
- connector->num_h_tile, connector->num_v_tile,
- connector->tile_h_loc, connector->tile_v_loc,
- connector->tile_h_size, connector->tile_v_size);
- ret = drm_property_replace_global_blob(dev,
- &connector->tile_blob_ptr,
- strlen(tile) + 1,
- tile,
- &connector->base,
- dev->mode_config.tile_property);
- return ret;
- }
- EXPORT_SYMBOL(drm_connector_set_tile_property);
- /**
- * drm_connector_update_edid_property - update the edid property of a connector
- * @connector: drm connector
- * @edid: new value of the edid property
- *
- * This function creates a new blob modeset object and assigns its id to the
- * connector's edid property.
- * Since we also parse tile information from EDID's displayID block, we also
- * set the connector's tile property here. See drm_connector_set_tile_property()
- * for more details.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_connector_update_edid_property(struct drm_connector *connector,
- const struct edid *edid)
- {
- struct drm_device *dev = connector->dev;
- size_t size = 0;
- int ret;
- const struct edid *old_edid;
- /* ignore requests to set edid when overridden */
- if (connector->override_edid)
- return 0;
- if (edid)
- size = EDID_LENGTH * (1 + edid->extensions);
- /* Set the display info, using edid if available, otherwise
- * resetting the values to defaults. This duplicates the work
- * done in drm_add_edid_modes, but that function is not
- * consistently called before this one in all drivers and the
- * computation is cheap enough that it seems better to
- * duplicate it rather than attempt to ensure some arbitrary
- * ordering of calls.
- */
- if (edid)
- drm_add_display_info(connector, edid);
- drm_update_tile_info(connector, edid);
- if (connector->edid_blob_ptr) {
- old_edid = (const struct edid *)connector->edid_blob_ptr->data;
- if (old_edid) {
- if (!drm_edid_are_equal(edid, old_edid)) {
- DRM_DEBUG_KMS("[CONNECTOR:%d:%s] Edid was changed.\n",
- connector->base.id, connector->name);
- connector->epoch_counter += 1;
- DRM_DEBUG_KMS("Updating change counter to %llu\n",
- connector->epoch_counter);
- }
- }
- }
- drm_object_property_set_value(&connector->base,
- dev->mode_config.non_desktop_property,
- connector->display_info.non_desktop);
- ret = drm_property_replace_global_blob(dev,
- &connector->edid_blob_ptr,
- size,
- edid,
- &connector->base,
- dev->mode_config.edid_property);
- if (ret)
- return ret;
- return drm_connector_set_tile_property(connector);
- }
- EXPORT_SYMBOL(drm_connector_update_edid_property);
- /**
- * drm_connector_set_link_status_property - Set link status property of a connector
- * @connector: drm connector
- * @link_status: new value of link status property (0: Good, 1: Bad)
- *
- * In usual working scenario, this link status property will always be set to
- * "GOOD". If something fails during or after a mode set, the kernel driver
- * may set this link status property to "BAD". The caller then needs to send a
- * hotplug uevent for userspace to re-check the valid modes through
- * GET_CONNECTOR_IOCTL and retry modeset.
- *
- * Note: Drivers cannot rely on userspace to support this property and
- * issue a modeset. As such, they may choose to handle issues (like
- * re-training a link) without userspace's intervention.
- *
- * The reason for adding this property is to handle link training failures, but
- * it is not limited to DP or link training. For example, if we implement
- * asynchronous setcrtc, this property can be used to report any failures in that.
- */
- void drm_connector_set_link_status_property(struct drm_connector *connector,
- uint64_t link_status)
- {
- struct drm_device *dev = connector->dev;
- drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
- connector->state->link_status = link_status;
- drm_modeset_unlock(&dev->mode_config.connection_mutex);
- }
- EXPORT_SYMBOL(drm_connector_set_link_status_property);
- /**
- * drm_connector_attach_max_bpc_property - attach "max bpc" property
- * @connector: connector to attach max bpc property on.
- * @min: The minimum bit depth supported by the connector.
- * @max: The maximum bit depth supported by the connector.
- *
- * This is used to add support for limiting the bit depth on a connector.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
- int min, int max)
- {
- struct drm_device *dev = connector->dev;
- struct drm_property *prop;
- prop = connector->max_bpc_property;
- if (!prop) {
- prop = drm_property_create_range(dev, 0, "max bpc", min, max);
- if (!prop)
- return -ENOMEM;
- connector->max_bpc_property = prop;
- }
- drm_object_attach_property(&connector->base, prop, max);
- connector->state->max_requested_bpc = max;
- connector->state->max_bpc = max;
- return 0;
- }
- EXPORT_SYMBOL(drm_connector_attach_max_bpc_property);
- /**
- * drm_connector_set_vrr_capable_property - sets the variable refresh rate
- * capable property for a connector
- * @connector: drm connector
- * @capable: True if the connector is variable refresh rate capable
- *
- * Should be used by atomic drivers to update the indicated support for
- * variable refresh rate over a connector.
- */
- void drm_connector_set_vrr_capable_property(
- struct drm_connector *connector, bool capable)
- {
- if (!connector->vrr_capable_property)
- return;
- drm_object_property_set_value(&connector->base,
- connector->vrr_capable_property,
- capable);
- }
- EXPORT_SYMBOL(drm_connector_set_vrr_capable_property);
- /**
- * drm_connector_set_panel_orientation - sets the connector's panel_orientation
- * @connector: connector for which to set the panel-orientation property.
- * @panel_orientation: drm_panel_orientation value to set
- *
- * This function sets the connector's panel_orientation and attaches
- * a "panel orientation" property to the connector.
- *
- * Calling this function on a connector where the panel_orientation has
- * already been set is a no-op (e.g. the orientation has been overridden with
- * a kernel commandline option).
- *
- * It is allowed to call this function with a panel_orientation of
- * DRM_MODE_PANEL_ORIENTATION_UNKNOWN, in which case it is a no-op.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_connector_set_panel_orientation(
- struct drm_connector *connector,
- enum drm_panel_orientation panel_orientation)
- {
- struct drm_device *dev = connector->dev;
- struct drm_display_info *info = &connector->display_info;
- struct drm_property *prop;
- /* Already set? */
- if (info->panel_orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
- return 0;
- /* Don't attach the property if the orientation is unknown */
- if (panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
- return 0;
- info->panel_orientation = panel_orientation;
- prop = dev->mode_config.panel_orientation_property;
- if (!prop) {
- prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
- "panel orientation",
- drm_panel_orientation_enum_list,
- ARRAY_SIZE(drm_panel_orientation_enum_list));
- if (!prop)
- return -ENOMEM;
- dev->mode_config.panel_orientation_property = prop;
- }
- drm_object_attach_property(&connector->base, prop,
- info->panel_orientation);
- return 0;
- }
- EXPORT_SYMBOL(drm_connector_set_panel_orientation);
- /**
- * drm_connector_set_panel_orientation_with_quirk -
- * set the connector's panel_orientation after checking for quirks
- * @connector: connector for which to init the panel-orientation property.
- * @panel_orientation: drm_panel_orientation value to set
- * @width: width in pixels of the panel, used for panel quirk detection
- * @height: height in pixels of the panel, used for panel quirk detection
- *
- * Like drm_connector_set_panel_orientation(), but with a check for platform
- * specific (e.g. DMI based) quirks overriding the passed in panel_orientation.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
- int drm_connector_set_panel_orientation_with_quirk(
- struct drm_connector *connector,
- enum drm_panel_orientation panel_orientation,
- int width, int height)
- {
- int orientation_quirk;
- orientation_quirk = drm_get_panel_orientation_quirk(width, height);
- if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
- panel_orientation = orientation_quirk;
- return drm_connector_set_panel_orientation(connector,
- panel_orientation);
- }
- EXPORT_SYMBOL(drm_connector_set_panel_orientation_with_quirk);
- int drm_connector_set_obj_prop(struct drm_mode_object *obj,
- struct drm_property *property,
- uint64_t value)
- {
- int ret = -EINVAL;
- struct drm_connector *connector = obj_to_connector(obj);
- /* Do DPMS ourselves */
- if (property == connector->dev->mode_config.dpms_property) {
- ret = (*connector->funcs->dpms)(connector, (int)value);
- } else if (connector->funcs->set_property)
- ret = connector->funcs->set_property(connector, property, value);
- if (!ret)
- drm_object_property_set_value(&connector->base, property, value);
- return ret;
- }
- int drm_connector_property_set_ioctl(struct drm_device *dev,
- void *data, struct drm_file *file_priv)
- {
- struct drm_mode_connector_set_property *conn_set_prop = data;
- struct drm_mode_obj_set_property obj_set_prop = {
- .value = conn_set_prop->value,
- .prop_id = conn_set_prop->prop_id,
- .obj_id = conn_set_prop->connector_id,
- .obj_type = DRM_MODE_OBJECT_CONNECTOR
- };
- /* It does all the locking and checking we need */
- return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
- }
- static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
- {
- /* For atomic drivers only state objects are synchronously updated and
- * protected by modeset locks, so check those first. */
- if (connector->state)
- return connector->state->best_encoder;
- return connector->encoder;
- }
- static bool
- drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
- const struct list_head *modes,
- const struct drm_file *file_priv)
- {
- /*
- * If user-space hasn't configured the driver to expose the stereo 3D
- * modes, don't expose them.
- */
- if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
- return false;
- /*
- * If user-space hasn't configured the driver to expose the modes
- * with aspect-ratio, don't expose them. However if such a mode
- * is unique, let it be exposed, but reset the aspect-ratio flags
- * while preparing the list of user-modes.
- */
- if (!file_priv->aspect_ratio_allowed) {
- const struct drm_display_mode *mode_itr;
- list_for_each_entry(mode_itr, modes, head) {
- if (mode_itr->expose_to_userspace &&
- drm_mode_match(mode_itr, mode,
- DRM_MODE_MATCH_TIMINGS |
- DRM_MODE_MATCH_CLOCK |
- DRM_MODE_MATCH_FLAGS |
- DRM_MODE_MATCH_3D_FLAGS))
- return false;
- }
- }
- return true;
- }
- int drm_mode_getconnector(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
- {
- struct drm_mode_get_connector *out_resp = data;
- struct drm_connector *connector;
- struct drm_encoder *encoder;
- struct drm_display_mode *mode;
- int mode_count = 0;
- int encoders_count = 0;
- int ret = 0;
- int copied = 0;
- struct drm_mode_modeinfo u_mode;
- struct drm_mode_modeinfo __user *mode_ptr;
- uint32_t __user *encoder_ptr;
- if (!drm_core_check_feature(dev, DRIVER_MODESET))
- return -EOPNOTSUPP;
- memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
- connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id);
- if (!connector)
- return -ENOENT;
- encoders_count = hweight32(connector->possible_encoders);
- if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
- copied = 0;
- encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
- drm_connector_for_each_possible_encoder(connector, encoder) {
- if (put_user(encoder->base.id, encoder_ptr + copied)) {
- ret = -EFAULT;
- goto out;
- }
- copied++;
- }
- }
- out_resp->count_encoders = encoders_count;
- out_resp->connector_id = connector->base.id;
- out_resp->connector_type = connector->connector_type;
- out_resp->connector_type_id = connector->connector_type_id;
- mutex_lock(&dev->mode_config.mutex);
- if (out_resp->count_modes == 0) {
- connector->funcs->fill_modes(connector,
- dev->mode_config.max_width,
- dev->mode_config.max_height);
- }
- out_resp->mm_width = connector->display_info.width_mm;
- out_resp->mm_height = connector->display_info.height_mm;
- out_resp->subpixel = connector->display_info.subpixel_order;
- out_resp->connection = connector->status;
- /* delayed so we get modes regardless of pre-fill_modes state */
- list_for_each_entry(mode, &connector->modes, head) {
- WARN_ON(mode->expose_to_userspace);
- if (drm_mode_expose_to_userspace(mode, &connector->modes,
- file_priv)) {
- mode->expose_to_userspace = true;
- mode_count++;
- }
- }
- /*
- * This ioctl is called twice, once to determine how much space is
- * needed, and the 2nd time to fill it.
- */
- if ((out_resp->count_modes >= mode_count) && mode_count) {
- copied = 0;
- mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
- list_for_each_entry(mode, &connector->modes, head) {
- if (!mode->expose_to_userspace)
- continue;
- /* Clear the tag for the next time around */
- mode->expose_to_userspace = false;
- drm_mode_convert_to_umode(&u_mode, mode);
- /*
- * Reset aspect ratio flags of user-mode, if modes with
- * aspect-ratio are not supported.
- */
- if (!file_priv->aspect_ratio_allowed)
- u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
- if (copy_to_user(mode_ptr + copied,
- &u_mode, sizeof(u_mode))) {
- ret = -EFAULT;
- /*
- * Clear the tag for the rest of
- * the modes for the next time around.
- */
- list_for_each_entry_continue(mode, &connector->modes, head)
- mode->expose_to_userspace = false;
- mutex_unlock(&dev->mode_config.mutex);
- goto out;
- }
- copied++;
- }
- } else {
- /* Clear the tag for the next time around */
- list_for_each_entry(mode, &connector->modes, head)
- mode->expose_to_userspace = false;
- }
- out_resp->count_modes = mode_count;
- mutex_unlock(&dev->mode_config.mutex);
- drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
- encoder = drm_connector_get_encoder(connector);
- if (encoder)
- out_resp->encoder_id = encoder->base.id;
- else
- out_resp->encoder_id = 0;
- /* Only grab properties after probing, to make sure EDID and other
- * properties reflect the latest status. */
- ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic,
- (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
- (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
- &out_resp->count_props);
- drm_modeset_unlock(&dev->mode_config.connection_mutex);
- out:
- drm_connector_put(connector);
- return ret;
- }
- /**
- * DOC: Tile group
- *
- * Tile groups are used to represent tiled monitors with a unique integer
- * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle,
- * we store this in a tile group, so we have a common identifier for all tiles
- * in a monitor group. The property is called "TILE". Drivers can manage tile
- * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and
- * drm_mode_get_tile_group(). But this is only needed for internal panels where
- * the tile group information is exposed through a non-standard way.
- */
- static void drm_tile_group_free(struct kref *kref)
- {
- struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
- struct drm_device *dev = tg->dev;
- mutex_lock(&dev->mode_config.idr_mutex);
- idr_remove(&dev->mode_config.tile_idr, tg->id);
- mutex_unlock(&dev->mode_config.idr_mutex);
- kfree(tg);
- }
- /**
- * drm_mode_put_tile_group - drop a reference to a tile group.
- * @dev: DRM device
- * @tg: tile group to drop reference to.
- *
- * drop reference to tile group and free if 0.
- */
- void drm_mode_put_tile_group(struct drm_device *dev,
- struct drm_tile_group *tg)
- {
- kref_put(&tg->refcount, drm_tile_group_free);
- }
- EXPORT_SYMBOL(drm_mode_put_tile_group);
- /**
- * drm_mode_get_tile_group - get a reference to an existing tile group
- * @dev: DRM device
- * @topology: 8-bytes unique per monitor.
- *
- * Use the unique bytes to get a reference to an existing tile group.
- *
- * RETURNS:
- * tile group or NULL if not found.
- */
- struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
- const char topology[8])
- {
- struct drm_tile_group *tg;
- int id;
- mutex_lock(&dev->mode_config.idr_mutex);
- idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
- if (!memcmp(tg->group_data, topology, 8)) {
- if (!kref_get_unless_zero(&tg->refcount))
- tg = NULL;
- mutex_unlock(&dev->mode_config.idr_mutex);
- return tg;
- }
- }
- mutex_unlock(&dev->mode_config.idr_mutex);
- return NULL;
- }
- EXPORT_SYMBOL(drm_mode_get_tile_group);
- /**
- * drm_mode_create_tile_group - create a tile group from a displayid description
- * @dev: DRM device
- * @topology: 8-bytes unique per monitor.
- *
- * Create a tile group for the unique monitor, and get a unique
- * identifier for the tile group.
- *
- * RETURNS:
- * new tile group or NULL.
- */
- struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
- const char topology[8])
- {
- struct drm_tile_group *tg;
- int ret;
- tg = kzalloc(sizeof(*tg), GFP_KERNEL);
- if (!tg)
- return NULL;
- kref_init(&tg->refcount);
- memcpy(tg->group_data, topology, 8);
- tg->dev = dev;
- mutex_lock(&dev->mode_config.idr_mutex);
- ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
- if (ret >= 0) {
- tg->id = ret;
- } else {
- kfree(tg);
- tg = NULL;
- }
- mutex_unlock(&dev->mode_config.idr_mutex);
- return tg;
- }
- EXPORT_SYMBOL(drm_mode_create_tile_group);
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