| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Daniel Vetter | 3660 | 44.78% | 30 | 18.63% |
| Dave Airlie | 1038 | 12.70% | 14 | 8.70% |
| Hans de Goede | 688 | 8.42% | 7 | 4.35% |
| Maxime Ripard | 297 | 3.63% | 10 | 6.21% |
| Uma Shankar | 187 | 2.29% | 2 | 1.24% |
| Boris Brezillon | 172 | 2.10% | 1 | 0.62% |
| Maarten Lankhorst | 168 | 2.06% | 3 | 1.86% |
| Gwan-gyeong Mun | 159 | 1.95% | 2 | 1.24% |
| Rajat Jain | 133 | 1.63% | 1 | 0.62% |
| Stanislav Lisovskiy | 131 | 1.60% | 2 | 1.24% |
| Oleg Vasilev | 130 | 1.59% | 1 | 0.62% |
| Ville Syrjälä | 115 | 1.41% | 11 | 6.83% |
| Manasi D Navare | 108 | 1.32% | 3 | 1.86% |
| Radhakrishna Sripada | 99 | 1.21% | 1 | 0.62% |
| Rob Clark | 93 | 1.14% | 5 | 3.11% |
| Nicholas Kazlauskas | 88 | 1.08% | 1 | 0.62% |
| Ilia Mirkin | 77 | 0.94% | 1 | 0.62% |
| Ankit Nautiyal | 68 | 0.83% | 1 | 0.62% |
| Laurent Pinchart | 65 | 0.80% | 3 | 1.86% |
| Jani Nikula | 55 | 0.67% | 2 | 1.24% |
| Derek Basehore | 55 | 0.67% | 1 | 0.62% |
| Eric Anholt | 52 | 0.64% | 4 | 2.48% |
| Hsin-Yi, Wang | 51 | 0.62% | 1 | 0.62% |
| Simon Ser | 41 | 0.50% | 4 | 2.48% |
| Ma Ling | 40 | 0.49% | 1 | 0.62% |
| Chris Wilson | 36 | 0.44% | 5 | 3.11% |
| Andrzej Pietrasiewicz | 33 | 0.40% | 1 | 0.62% |
| Gerd Hoffmann | 31 | 0.38% | 1 | 0.62% |
| Thomas Hellstrom | 30 | 0.37% | 2 | 1.24% |
| Jesse Barnes | 28 | 0.34% | 3 | 1.86% |
| Vandana Kannan | 23 | 0.28% | 1 | 0.62% |
| Thierry Reding | 22 | 0.27% | 6 | 3.73% |
| Francisco Jerez | 20 | 0.24% | 2 | 1.24% |
| José Roberto de Souza | 19 | 0.23% | 1 | 0.62% |
| Haneen Mohammed | 16 | 0.20% | 1 | 0.62% |
| Stephen Chandler Paul | 13 | 0.16% | 1 | 0.62% |
| Randy Dunlap | 12 | 0.15% | 1 | 0.62% |
| Noralf Trönnes | 12 | 0.15% | 2 | 1.24% |
| Linus Torvalds (pre-git) | 12 | 0.15% | 1 | 0.62% |
| Jyri Sarha | 11 | 0.13% | 1 | 0.62% |
| Alex Deucher | 10 | 0.12% | 2 | 1.24% |
| Brian Starkey | 10 | 0.12% | 1 | 0.62% |
| Tejun Heo | 10 | 0.12% | 1 | 0.62% |
| Jeykumar Sankaran | 7 | 0.09% | 1 | 0.62% |
| Desmond Cheong Zhi Xi | 7 | 0.09% | 1 | 0.62% |
| Bo Liu | 7 | 0.09% | 1 | 0.62% |
| Shobhit Kumar | 6 | 0.07% | 1 | 0.62% |
| Antonio Borneo | 5 | 0.06% | 1 | 0.62% |
| Damien Lespiau | 5 | 0.06% | 2 | 1.24% |
| Thomas Wood | 4 | 0.05% | 1 | 0.62% |
| Dan Carpenter | 3 | 0.04% | 1 | 0.62% |
| Beatriz Martins de Carvalho | 3 | 0.04% | 1 | 0.62% |
| Matt Roper | 2 | 0.02% | 1 | 0.62% |
| Keith Packard | 2 | 0.02% | 1 | 0.62% |
| David Herrmann | 2 | 0.02% | 1 | 0.62% |
| Sean Paul | 1 | 0.01% | 1 | 0.62% |
| Mario Kleiner | 1 | 0.01% | 1 | 0.62% |
| Mauro Carvalho Chehab | 1 | 0.01% | 1 | 0.62% |
| Total | 8174 | 161 |
/* * 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_auth.h> #include <drm/drm_connector.h> #include <drm/drm_drv.h> #include <drm/drm_edid.h> #include <drm/drm_encoder.h> #include <drm/drm_file.h> #include <drm/drm_managed.h> #include <drm/drm_panel.h> #include <drm/drm_print.h> #include <drm/drm_privacy_screen_consumer.h> #include <drm/drm_sysfs.h> #include <drm/drm_utils.h> #include <linux/fb.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(). */ /* * Global connector list for drm_connector_find_by_fwnode(). * Note drm_connector_[un]register() first take connector->lock and then * take the connector_list_lock. */ static DEFINE_MUTEX(connector_list_lock); static LIST_HEAD(connector_list); 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" }, { DRM_MODE_CONNECTOR_USB, "USB" }, }; 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); } } static int __drm_connector_init(struct drm_device *dev, struct drm_connector *connector, const struct drm_connector_funcs *funcs, int connector_type, struct i2c_adapter *ddc) { 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_alloc_max(&config->connector_ida, 31, 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_alloc_min(connector_ida, 1, 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; } /* provide ddc symlink in sysfs */ connector->ddc = ddc; INIT_LIST_HEAD(&connector->global_connector_list_entry); INIT_LIST_HEAD(&connector->probed_modes); INIT_LIST_HEAD(&connector->modes); mutex_init(&connector->mutex); mutex_init(&connector->edid_override_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_free(connector_ida, connector->connector_type_id); out_put_id: if (ret) ida_free(&config->connector_ida, connector->index); out_put: if (ret) drm_mode_object_unregister(dev, &connector->base); return ret; } /** * 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. * * At driver unload time the driver's &drm_connector_funcs.destroy hook * should call drm_connector_cleanup() and free the connector structure. * The connector structure should not be allocated with devm_kzalloc(). * * Note: consider using drmm_connector_init() instead of * drm_connector_init() to let the DRM managed resource infrastructure * take care of cleanup and deallocation. * * 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) { if (drm_WARN_ON(dev, !(funcs && funcs->destroy))) return -EINVAL; return __drm_connector_init(dev, connector, funcs, connector_type, NULL); } 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. * * At driver unload time the driver's &drm_connector_funcs.destroy hook * should call drm_connector_cleanup() and free the connector structure. * The connector structure should not be allocated with devm_kzalloc(). * * Ensures that the ddc field of the connector is correctly set. * * Note: consider using drmm_connector_init() instead of * drm_connector_init_with_ddc() to let the DRM managed resource * infrastructure take care of cleanup and deallocation. * * 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) { if (drm_WARN_ON(dev, !(funcs && funcs->destroy))) return -EINVAL; return __drm_connector_init(dev, connector, funcs, connector_type, ddc); } EXPORT_SYMBOL(drm_connector_init_with_ddc); static void drm_connector_cleanup_action(struct drm_device *dev, void *ptr) { struct drm_connector *connector = ptr; drm_connector_cleanup(connector); } /** * drmm_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 * @ddc: optional pointer to the associated ddc adapter * * Initialises a preallocated connector. Connectors should be * subclassed as part of driver connector objects. * * Cleanup is automatically handled with a call to * drm_connector_cleanup() in a DRM-managed action. * * The connector structure should be allocated with drmm_kzalloc(). * * Returns: * Zero on success, error code on failure. */ int drmm_connector_init(struct drm_device *dev, struct drm_connector *connector, const struct drm_connector_funcs *funcs, int connector_type, struct i2c_adapter *ddc) { int ret; if (drm_WARN_ON(dev, funcs && funcs->destroy)) return -EINVAL; ret = __drm_connector_init(dev, connector, funcs, connector_type, ddc); if (ret) return ret; ret = drmm_add_action_or_reset(dev, drm_connector_cleanup_action, connector); if (ret) return ret; return 0; } EXPORT_SYMBOL(drmm_connector_init); /** * 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->privacy_screen) { drm_privacy_screen_put(connector->privacy_screen); connector->privacy_screen = NULL; } 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_free(&drm_connector_enum_list[connector->connector_type].ida, connector->connector_type_id); ida_free(&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; fwnode_handle_put(connector->fwnode); connector->fwnode = 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)); if (dev->registered) drm_sysfs_hotplug_event(dev); } 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(). * * When the connector is no longer available, callers must call * drm_connector_unregister(). * * 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_connector_hotplug_event(connector); if (connector->privacy_screen) drm_privacy_screen_register_notifier(connector->privacy_screen, &connector->privacy_screen_notifier); mutex_lock(&connector_list_lock); list_add_tail(&connector->global_connector_list_entry, &connector_list); mutex_unlock(&connector_list_lock); 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 been registered explicitly by calling * drm_connector_register(). */ void drm_connector_unregister(struct drm_connector *connector) { mutex_lock(&connector->mutex); if (connector->registration_state != DRM_CONNECTOR_REGISTERED) { mutex_unlock(&connector->mutex); return; } mutex_lock(&connector_list_lock); list_del_init(&connector->global_connector_list_entry); mutex_unlock(&connector_list_lock); if (connector->privacy_screen) drm_privacy_screen_unregister_notifier( connector->privacy_screen, &connector->privacy_screen_notifier); 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. * * Returns: connector status string */ 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. * * Returns: string describing an enumerated subpixel property */ 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. * * Returns: * 0 on success or a negative error code on failure. */ 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. * * User-space should not parse the EDID to obtain information exposed via * other KMS properties (because the kernel might apply limits, quirks or * fixups to the EDID). For instance, user-space should not try to parse * mode lists from the EDID. * 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. * * privacy-screen sw-state, privacy-screen hw-state: * These 2 optional properties can be used to query the state of the * electronic privacy screen that is available on some displays; and in * some cases also control the state. If a driver implements these * properties then both properties must be present. * * "privacy-screen hw-state" is read-only and reflects the actual state * of the privacy-screen, possible values: "Enabled", "Disabled, * "Enabled-locked", "Disabled-locked". The locked states indicate * that the state cannot be changed through the DRM API. E.g. there * might be devices where the firmware-setup options, or a hardware * slider-switch, offer always on / off modes. * * "privacy-screen sw-state" can be set to change the privacy-screen state * when not locked. In this case the driver must update the hw-state * property to reflect the new state on completion of the commit of the * sw-state property. Setting the sw-state property when the hw-state is * locked must be interpreted by the driver as a request to change the * state to the set state when the hw-state becomes unlocked. E.g. if * "privacy-screen hw-state" is "Enabled-locked" and the sw-state * gets set to "Disabled" followed by the user unlocking the state by * changing the slider-switch position, then the driver must set the * state to "Disabled" upon receiving the unlock event. * * In some cases the privacy-screen's actual state might change outside of * control of the DRM code. E.g. there might be a firmware handled hotkey * which toggles the actual state, or the actual state might be changed * through another userspace API such as writing /proc/acpi/ibm/lcdshadow. * In this case the driver must update both the hw-state and the sw-state * to reflect the new value, overwriting any pending state requests in the * sw-state. Any pending sw-state requests are thus discarded. * * Note that the ability for the state to change outside of control of * the DRM master process means that userspace must not cache the value * of the sw-state. Caching the sw-state value and including it in later * atomic commits may lead to overriding a state change done through e.g. * a firmware handled hotkey. Therefor userspace must not include the * privacy-screen sw-state in an atomic commit unless it wants to change * its value. */ 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. * * Returns: %0 */ 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 * * The meaning of each content type is defined in CTA-861-G table 15. * * 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. * * Returns: %0 */ 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_connector_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(). * * Returns: * 0 on success or a negative error code on failure. */ 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. * * Returns: * 0 on success or a negative error code on failure. */ 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.scaling_mode * in the atomic state. * * Returns: %0 */ 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.scaling_mode * 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. * * Returns: * 0 on success or a negative error code on failure. */ 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_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_attach_hdr_output_metadata_property - attach "HDR_OUTPUT_METADA" property * @connector: connector to attach the property on. * * This is used to allow the userspace to send HDR Metadata to the * driver. * * Returns: * Zero on success, negative errno on failure. */ int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct drm_property *prop = dev->mode_config.hdr_output_metadata_property; drm_object_attach_property(&connector->base, prop, 0); return 0; } EXPORT_SYMBOL(drm_connector_attach_hdr_output_metadata_property); /** * drm_connector_attach_colorspace_property - attach "Colorspace" property * @connector: connector to attach the property on. * * This is used to allow the userspace to signal the output colorspace * to the driver. * * Returns: * Zero on success, negative errno on failure. */ int drm_connector_attach_colorspace_property(struct drm_connector *connector) { struct drm_property *prop = connector->colorspace_property; drm_object_attach_property(&connector->base, prop, DRM_MODE_COLORIMETRY_DEFAULT); return 0; } EXPORT_SYMBOL(drm_connector_attach_colorspace_property); /** * drm_connector_atomic_hdr_metadata_equal - checks if the hdr metadata changed * @old_state: old connector state to compare * @new_state: new connector state to compare * * This is used by HDR-enabled drivers to test whether the HDR metadata * have changed between two different connector state (and thus probably * requires a full blown mode change). * * Returns: * True if the metadata are equal, False otherwise */ bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state, struct drm_connector_state *new_state) { struct drm_property_blob *old_blob = old_state->hdr_output_metadata; struct drm_property_blob *new_blob = new_state->hdr_output_metadata; if (!old_blob || !new_blob) return old_blob == new_blob; if (old_blob->length != new_blob->length) return false; return !memcmp(old_blob->data, new_blob->data, old_blob->length); } EXPORT_SYMBOL(drm_connector_atomic_hdr_metadata_equal); /** * 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. * * The function shouldn't be called in panel after drm is registered (i.e. * drm_dev_register() is called in drm). * * 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); /** * drm_connector_set_orientation_from_panel - * set the connector's panel_orientation from panel's callback. * @connector: connector for which to init the panel-orientation property. * @panel: panel that can provide orientation information. * * Drm drivers should call this function before drm_dev_register(). * Orientation is obtained from panel's .get_orientation() callback. * * Returns: * Zero on success, negative errno on failure. */ int drm_connector_set_orientation_from_panel( struct drm_connector *connector, struct drm_panel *panel) { enum drm_panel_orientation orientation; if (panel && panel->funcs && panel->funcs->get_orientation) orientation = panel->funcs->get_orientation(panel); else orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; return drm_connector_set_panel_orientation(connector, orientation); } EXPORT_SYMBOL(drm_connector_set_orientation_from_panel); static const struct drm_prop_enum_list privacy_screen_enum[] = { { PRIVACY_SCREEN_DISABLED, "Disabled" }, { PRIVACY_SCREEN_ENABLED, "Enabled" }, { PRIVACY_SCREEN_DISABLED_LOCKED, "Disabled-locked" }, { PRIVACY_SCREEN_ENABLED_LOCKED, "Enabled-locked" }, }; /** * drm_connector_create_privacy_screen_properties - create the drm connecter's * privacy-screen properties. * @connector: connector for which to create the privacy-screen properties * * This function creates the "privacy-screen sw-state" and "privacy-screen * hw-state" properties for the connector. They are not attached. */ void drm_connector_create_privacy_screen_properties(struct drm_connector *connector) { if (connector->privacy_screen_sw_state_property) return; /* Note sw-state only supports the first 2 values of the enum */ connector->privacy_screen_sw_state_property = drm_property_create_enum(connector->dev, DRM_MODE_PROP_ENUM, "privacy-screen sw-state", privacy_screen_enum, 2); connector->privacy_screen_hw_state_property = drm_property_create_enum(connector->dev, DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_ENUM, "privacy-screen hw-state", privacy_screen_enum, ARRAY_SIZE(privacy_screen_enum)); } EXPORT_SYMBOL(drm_connector_create_privacy_screen_properties); /** * drm_connector_attach_privacy_screen_properties - attach the drm connecter's * privacy-screen properties. * @connector: connector on which to attach the privacy-screen properties * * This function attaches the "privacy-screen sw-state" and "privacy-screen * hw-state" properties to the connector. The initial state of both is set * to "Disabled". */ void drm_connector_attach_privacy_screen_properties(struct drm_connector *connector) { if (!connector->privacy_screen_sw_state_property) return; drm_object_attach_property(&connector->base, connector->privacy_screen_sw_state_property, PRIVACY_SCREEN_DISABLED); drm_object_attach_property(&connector->base, connector->privacy_screen_hw_state_property, PRIVACY_SCREEN_DISABLED); } EXPORT_SYMBOL(drm_connector_attach_privacy_screen_properties); static void drm_connector_update_privacy_screen_properties( struct drm_connector *connector, bool set_sw_state) { enum drm_privacy_screen_status sw_state, hw_state; drm_privacy_screen_get_state(connector->privacy_screen, &sw_state, &hw_state); if (set_sw_state) connector->state->privacy_screen_sw_state = sw_state; drm_object_property_set_value(&connector->base, connector->privacy_screen_hw_state_property, hw_state); } static int drm_connector_privacy_screen_notifier( struct notifier_block *nb, unsigned long action, void *data) { struct drm_connector *connector = container_of(nb, struct drm_connector, privacy_screen_notifier); struct drm_device *dev = connector->dev; drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); drm_connector_update_privacy_screen_properties(connector, true); drm_modeset_unlock(&dev->mode_config.connection_mutex); drm_sysfs_connector_status_event(connector, connector->privacy_screen_sw_state_property); drm_sysfs_connector_status_event(connector, connector->privacy_screen_hw_state_property); return NOTIFY_DONE; } /** * drm_connector_attach_privacy_screen_provider - attach a privacy-screen to * the connector * @connector: connector to attach the privacy-screen to * @priv: drm_privacy_screen to attach * * Create and attach the standard privacy-screen properties and register * a generic notifier for generating sysfs-connector-status-events * on external changes to the privacy-screen status. * This function takes ownership of the passed in drm_privacy_screen and will * call drm_privacy_screen_put() on it when the connector is destroyed. */ void drm_connector_attach_privacy_screen_provider( struct drm_connector *connector, struct drm_privacy_screen *priv) { connector->privacy_screen = priv; connector->privacy_screen_notifier.notifier_call = drm_connector_privacy_screen_notifier; drm_connector_create_privacy_screen_properties(connector); drm_connector_update_privacy_screen_properties(connector, true); drm_connector_attach_privacy_screen_properties(connector); } EXPORT_SYMBOL(drm_connector_attach_privacy_screen_provider); /** * drm_connector_update_privacy_screen - update connector's privacy-screen sw-state * @connector_state: connector-state to update the privacy-screen for * * This function calls drm_privacy_screen_set_sw_state() on the connector's * privacy-screen. * * If the connector has no privacy-screen, then this is a no-op. */ void drm_connector_update_privacy_screen(const struct drm_connector_state *connector_state) { struct drm_connector *connector = connector_state->connector; int ret; if (!connector->privacy_screen) return; ret = drm_privacy_screen_set_sw_state(connector->privacy_screen, connector_state->privacy_screen_sw_state); if (ret) { drm_err(connector->dev, "Error updating privacy-screen sw_state\n"); return; } /* The hw_state property value may have changed, update it. */ drm_connector_update_privacy_screen_properties(connector, false); } EXPORT_SYMBOL(drm_connector_update_privacy_screen); 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; bool is_current_master; 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; is_current_master = drm_is_current_master(file_priv); mutex_lock(&dev->mode_config.mutex); if (out_resp->count_modes == 0) { if (is_current_master) connector->funcs->fill_modes(connector, dev->mode_config.max_width, dev->mode_config.max_height); else drm_dbg_kms(dev, "User-space requested a forced probe on [CONNECTOR:%d:%s] but is not the DRM master, demoting to read-only probe", connector->base.id, connector->name); } 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; } /** * drm_connector_find_by_fwnode - Find a connector based on the associated fwnode * @fwnode: fwnode for which to find the matching drm_connector * * This functions looks up a drm_connector based on its associated fwnode. When * a connector is found a reference to the connector is returned. The caller must * call drm_connector_put() to release this reference when it is done with the * connector. * * Returns: A reference to the found connector or an ERR_PTR(). */ struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode) { struct drm_connector *connector, *found = ERR_PTR(-ENODEV); if (!fwnode) return ERR_PTR(-ENODEV); mutex_lock(&connector_list_lock); list_for_each_entry(connector, &connector_list, global_connector_list_entry) { if (connector->fwnode == fwnode || (connector->fwnode && connector->fwnode->secondary == fwnode)) { drm_connector_get(connector); found = connector; break; } } mutex_unlock(&connector_list_lock); return found; } /** * drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector * @connector_fwnode: fwnode_handle to report the event on * * On some hardware a hotplug event notification may come from outside the display * driver / device. An example of this is some USB Type-C setups where the hardware * muxes the DisplayPort data and aux-lines but does not pass the altmode HPD * status bit to the GPU's DP HPD pin. * * This function can be used to report these out-of-band events after obtaining * a drm_connector reference through calling drm_connector_find_by_fwnode(). */ void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode) { struct drm_connector *connector; connector = drm_connector_find_by_fwnode(connector_fwnode); if (IS_ERR(connector)) return; if (connector->funcs->oob_hotplug_event) connector->funcs->oob_hotplug_event(connector); drm_connector_put(connector); } EXPORT_SYMBOL(drm_connector_oob_hotplug_event); /** * 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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