| /* |
| * 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/property.h> |
| #include <linux/uaccess.h> |
| |
| #include <video/cmdline.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; |
| const char *option; |
| |
| option = video_get_options(connector->name); |
| if (!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); |
| kfree(connector->display_info.vics); |
| 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; |
| } |
| |
| ret = drm_sysfs_connector_add_late(connector); |
| if (ret) |
| goto err_late_register; |
| |
| 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_late_register: |
| if (connector->funcs->early_unregister) |
| connector->funcs->early_unregister(connector); |
| 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); |
| |
| drm_sysfs_connector_remove_early(connector); |
| |
| if (connector->funcs->early_unregister) |
| connector->funcs->early_unregister(connector); |
| |
| drm_debugfs_connector_remove(connector); |
| drm_sysfs_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_mode_enum_list[] = { |
| { DRM_MODE_TV_MODE_NTSC, "NTSC" }, |
| { DRM_MODE_TV_MODE_NTSC_443, "NTSC-443" }, |
| { DRM_MODE_TV_MODE_NTSC_J, "NTSC-J" }, |
| { DRM_MODE_TV_MODE_PAL, "PAL" }, |
| { DRM_MODE_TV_MODE_PAL_M, "PAL-M" }, |
| { DRM_MODE_TV_MODE_PAL_N, "PAL-N" }, |
| { DRM_MODE_TV_MODE_SECAM, "SECAM" }, |
| }; |
| DRM_ENUM_NAME_FN(drm_get_tv_mode_name, drm_tv_mode_enum_list) |
| |
| /** |
| * drm_get_tv_mode_from_name - Translates a TV mode name into its enum value |
| * @name: TV Mode name we want to convert |
| * @len: Length of @name |
| * |
| * Translates @name into an enum drm_connector_tv_mode. |
| * |
| * Returns: the enum value on success, a negative errno otherwise. |
| */ |
| int drm_get_tv_mode_from_name(const char *name, size_t len) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(drm_tv_mode_enum_list); i++) { |
| const struct drm_prop_enum_list *item = &drm_tv_mode_enum_list[i]; |
| |
| if (strlen(item->name) == len && !strncmp(item->name, name, len)) |
| return item->type; |
| } |
| |
| return -EINVAL; |
| } |
| EXPORT_SYMBOL(drm_get_tv_mode_from_name); |
| |
| 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 char * const colorspace_names[] = { |
| /* 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", |
| [DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED] = "RGB_WIDE_FIXED", |
| /* Colorimetry based on scRGB (IEC 61966-2-2) */ |
| [DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT] = "RGB_WIDE_FLOAT", |
| [DRM_MODE_COLORIMETRY_BT601_YCC] = "BT601_YCC", |
| }; |
| |
| /** |
| * drm_get_colorspace_name - return a string for color encoding |
| * @colorspace: color space to compute name of |
| * |
| * In contrast to the other drm_get_*_name functions this one here returns a |
| * const pointer and hence is threadsafe. |
| */ |
| const char *drm_get_colorspace_name(enum drm_colorspace colorspace) |
| { |
| if (colorspace < ARRAY_SIZE(colorspace_names) && colorspace_names[colorspace]) |
| return colorspace_names[colorspace]; |
| else |
| return "(null)"; |
| } |
| |
| static const u32 hdmi_colorspaces = |
| BIT(DRM_MODE_COLORIMETRY_SMPTE_170M_YCC) | |
| BIT(DRM_MODE_COLORIMETRY_BT709_YCC) | |
| BIT(DRM_MODE_COLORIMETRY_XVYCC_601) | |
| BIT(DRM_MODE_COLORIMETRY_XVYCC_709) | |
| BIT(DRM_MODE_COLORIMETRY_SYCC_601) | |
| BIT(DRM_MODE_COLORIMETRY_OPYCC_601) | |
| BIT(DRM_MODE_COLORIMETRY_OPRGB) | |
| BIT(DRM_MODE_COLORIMETRY_BT2020_CYCC) | |
| BIT(DRM_MODE_COLORIMETRY_BT2020_RGB) | |
| BIT(DRM_MODE_COLORIMETRY_BT2020_YCC) | |
| BIT(DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65) | |
| BIT(DRM_MODE_COLORIMETRY_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 u32 dp_colorspaces = |
| BIT(DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED) | |
| BIT(DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT) | |
| BIT(DRM_MODE_COLORIMETRY_OPRGB) | |
| BIT(DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65) | |
| BIT(DRM_MODE_COLORIMETRY_BT2020_RGB) | |
| BIT(DRM_MODE_COLORIMETRY_BT601_YCC) | |
| BIT(DRM_MODE_COLORIMETRY_BT709_YCC) | |
| BIT(DRM_MODE_COLORIMETRY_XVYCC_601) | |
| BIT(DRM_MODE_COLORIMETRY_XVYCC_709) | |
| BIT(DRM_MODE_COLORIMETRY_SYCC_601) | |
| BIT(DRM_MODE_COLORIMETRY_OPYCC_601) | |
| BIT(DRM_MODE_COLORIMETRY_BT2020_CYCC) | |
| BIT(DRM_MODE_COLORIMETRY_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. |
| * |
| * In the case of DP MST, the property has the format |
| * ``mst:<parent>-<ports>`` where ``<parent>`` is the KMS object ID of the |
| * parent connector and ``<ports>`` is a hyphen-separated list of DP MST |
| * port numbers. Note, KMS object IDs are not guaranteed to be stable |
| * across reboots. |
| * 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. |
| * |
| * left margin, right margin, top margin, bottom margin: |
| * Add margins to the connector's viewport. This is typically used to |
| * mitigate overscan on TVs. |
| * |
| * The value is the size in pixels of the black border which will be |
| * added. The attached CRTC's content will be scaled to fill the whole |
| * area inside the margin. |
| * |
| * The margins configuration might be sent to the sink, e.g. via HDMI AVI |
| * InfoFrames. |
| * |
| * Drivers can set up these properties by calling |
| * drm_mode_create_tv_margin_properties(). |
| */ |
| |
| 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(). |
| */ |
| |
| /* |
| * TODO: Document the properties: |
| * - brightness |
| * - contrast |
| * - flicker reduction |
| * - hue |
| * - mode |
| * - overscan |
| * - saturation |
| * - select subconnector |
| */ |
| /** |
| * DOC: Analog TV Connector Properties |
| * |
| * TV Mode: |
| * Indicates the TV Mode used on an analog TV connector. The value |
| * of this property can be one of the following: |
| * |
| * NTSC: |
| * TV Mode is CCIR System M (aka 525-lines) together with |
| * the NTSC Color Encoding. |
| * |
| * NTSC-443: |
| * |
| * TV Mode is CCIR System M (aka 525-lines) together with |
| * the NTSC Color Encoding, but with a color subcarrier |
| * frequency of 4.43MHz |
| * |
| * NTSC-J: |
| * |
| * TV Mode is CCIR System M (aka 525-lines) together with |
| * the NTSC Color Encoding, but with a black level equal to |
| * the blanking level. |
| * |
| * PAL: |
| * |
| * TV Mode is CCIR System B (aka 625-lines) together with |
| * the PAL Color Encoding. |
| * |
| * PAL-M: |
| * |
| * TV Mode is CCIR System M (aka 525-lines) together with |
| * the PAL Color Encoding. |
| * |
| * PAL-N: |
| * |
| * TV Mode is CCIR System N together with the PAL Color |
| * Encoding, a color subcarrier frequency of 3.58MHz, the |
| * SECAM color space, and narrower channels than other PAL |
| * variants. |
| * |
| * SECAM: |
| * |
| * TV Mode is CCIR System B (aka 625-lines) together with |
| * the SECAM Color Encoding. |
| * |
| * Drivers can set up this property by calling |
| * drm_mode_create_tv_properties(). |
| */ |
| |
| /** |
| * 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_legacy(). |
| * |
| * 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_legacy - 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. |
| * |
| * NOTE: This functions registers the deprecated "mode" connector |
| * property to select the analog TV mode (ie, NTSC, PAL, etc.). New |
| * drivers must use drm_mode_create_tv_properties() instead. |
| * |
| * Returns: |
| * 0 on success or a negative error code on failure. |
| */ |
| int drm_mode_create_tv_properties_legacy(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; |
| |
| if (num_modes) { |
| dev->mode_config.legacy_tv_mode_property = |
| drm_property_create(dev, DRM_MODE_PROP_ENUM, |
| "mode", num_modes); |
| if (!dev->mode_config.legacy_tv_mode_property) |
| goto nomem; |
| |
| for (i = 0; i < num_modes; i++) |
| drm_property_add_enum(dev->mode_config.legacy_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_legacy); |
| |
| /** |
| * drm_mode_create_tv_properties - create TV specific connector properties |
| * @dev: DRM device |
| * @supported_tv_modes: Bitmask of TV modes supported (See DRM_MODE_TV_MODE_*) |
| * |
| * Called by a driver's TV initialization routine, this function creates |
| * the TV specific connector properties for a given device. |
| * |
| * Returns: |
| * 0 on success or a negative error code on failure. |
| */ |
| int drm_mode_create_tv_properties(struct drm_device *dev, |
| unsigned int supported_tv_modes) |
| { |
| struct drm_prop_enum_list tv_mode_list[DRM_MODE_TV_MODE_MAX]; |
| struct drm_property *tv_mode; |
| unsigned int i, len = 0; |
| |
| if (dev->mode_config.tv_mode_property) |
| return 0; |
| |
| for (i = 0; i < DRM_MODE_TV_MODE_MAX; i++) { |
| if (!(supported_tv_modes & BIT(i))) |
| continue; |
| |
| tv_mode_list[len].type = i; |
| tv_mode_list[len].name = drm_get_tv_mode_name(i); |
| len++; |
| } |
| |
| tv_mode = drm_property_create_enum(dev, 0, "TV mode", |
| tv_mode_list, len); |
| if (!tv_mode) |
| return -ENOMEM; |
| |
| dev->mode_config.tv_mode_property = tv_mode; |
| |
| return drm_mode_create_tv_properties_legacy(dev, 0, NULL); |
| } |
| 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. |
| */ |
| |
| static int drm_mode_create_colorspace_property(struct drm_connector *connector, |
| u32 supported_colorspaces) |
| { |
| struct drm_device *dev = connector->dev; |
| u32 colorspaces = supported_colorspaces | BIT(DRM_MODE_COLORIMETRY_DEFAULT); |
| struct drm_prop_enum_list enum_list[DRM_MODE_COLORIMETRY_COUNT]; |
| int i, len; |
| |
| if (connector->colorspace_property) |
| return 0; |
| |
| if (!supported_colorspaces) { |
| drm_err(dev, "No supported colorspaces provded on [CONNECTOR:%d:%s]\n", |
| connector->base.id, connector->name); |
| return -EINVAL; |
| } |
| |
| if ((supported_colorspaces & -BIT(DRM_MODE_COLORIMETRY_COUNT)) != 0) { |
| drm_err(dev, "Unknown colorspace provded on [CONNECTOR:%d:%s]\n", |
| connector->base.id, connector->name); |
| return -EINVAL; |
| } |
| |
| len = 0; |
| for (i = 0; i < DRM_MODE_COLORIMETRY_COUNT; i++) { |
| if ((colorspaces & BIT(i)) == 0) |
| continue; |
| |
| enum_list[len].type = i; |
| enum_list[len].name = colorspace_names[i]; |
| len++; |
| } |
| |
| connector->colorspace_property = |
| drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, "Colorspace", |
| enum_list, |
| len); |
| |
| if (!connector->colorspace_property) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| /** |
| * drm_mode_create_hdmi_colorspace_property - create hdmi colorspace property |
| * @connector: connector to create the Colorspace property on. |
| * @supported_colorspaces: bitmap of supported color spaces |
| * |
| * 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, |
| u32 supported_colorspaces) |
| { |
| u32 colorspaces; |
| |
| if (supported_colorspaces) |
| colorspaces = supported_colorspaces & hdmi_colorspaces; |
| else |
| colorspaces = hdmi_colorspaces; |
| |
| return drm_mode_create_colorspace_property(connector, colorspaces); |
| } |
| 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. |
| * @supported_colorspaces: bitmap of supported color spaces |
| * |
| * 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, |
| u32 supported_colorspaces) |
| { |
| u32 colorspaces; |
| |
| if (supported_colorspaces) |
| colorspaces = supported_colorspaces & dp_colorspaces; |
| else |
| colorspaces = dp_colorspaces; |
| |
| return drm_mode_create_colorspace_property(connector, colorspaces); |
| } |
| 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_property_event(connector, |
| connector->privacy_screen_sw_state_property); |
| drm_sysfs_connector_property_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 |
| * @status: hot plug detect logical state |
| * |
| * 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, |
| enum drm_connector_status status) |
| { |
| 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, status); |
| |
| 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); |