| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Daniel Vetter | 4941 | 76.66% | 16 | 35.56% |
| Stanislav Lisovskiy | 240 | 3.72% | 1 | 2.22% |
| Hans de Goede | 191 | 2.96% | 1 | 2.22% |
| Maarten Lankhorst | 190 | 2.95% | 1 | 2.22% |
| Manasi D Navare | 125 | 1.94% | 1 | 2.22% |
| Nicholas Kazlauskas | 114 | 1.77% | 2 | 4.44% |
| Radhakrishna Sripada | 111 | 1.72% | 1 | 2.22% |
| Sean Paul | 111 | 1.72% | 2 | 4.44% |
| Ville Syrjälä | 95 | 1.47% | 3 | 6.67% |
| Ankit Nautiyal | 88 | 1.37% | 1 | 2.22% |
| Dave Airlie | 62 | 0.96% | 1 | 2.22% |
| Jani Nikula | 52 | 0.81% | 1 | 2.22% |
| Gerd Hoffmann | 42 | 0.65% | 1 | 2.22% |
| Haneen Mohammed | 20 | 0.31% | 1 | 2.22% |
| Keith Packard | 20 | 0.31% | 2 | 4.44% |
| Stephen Chandler Paul | 14 | 0.22% | 2 | 4.44% |
| Thierry Reding | 12 | 0.19% | 3 | 6.67% |
| Brian Starkey | 10 | 0.16% | 1 | 2.22% |
| Christophe Jaillet | 4 | 0.06% | 2 | 4.44% |
| Laurent Pinchart | 2 | 0.03% | 1 | 2.22% |
| Chris Wilson | 1 | 0.02% | 1 | 2.22% |
| Total | 6445 | 45 |
/* * Copyright (c) 2016 Intel Corporation * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ #include <drm/drm_connector.h> #include <drm/drm_edid.h> #include <drm/drm_encoder.h> #include <drm/drm_utils.h> #include <drm/drm_print.h> #include <drm/drm_drv.h> #include <drm/drm_file.h> #include <linux/uaccess.h> #include "drm_crtc_internal.h" #include "drm_internal.h" /** * DOC: overview * * In DRM connectors are the general abstraction for display sinks, and include * als fixed panels or anything else that can display pixels in some form. As * opposed to all other KMS objects representing hardware (like CRTC, encoder or * plane abstractions) connectors can be hotplugged and unplugged at runtime. * Hence they are reference-counted using drm_connector_get() and * drm_connector_put(). * * KMS driver must create, initialize, register and attach at a &struct * drm_connector for each such sink. The instance is created as other KMS * objects and initialized by setting the following fields. The connector is * initialized with a call to drm_connector_init() with a pointer to the * &struct drm_connector_funcs and a connector type, and then exposed to * userspace with a call to drm_connector_register(). * * Connectors must be attached to an encoder to be used. For devices that map * connectors to encoders 1:1, the connector should be attached at * initialization time with a call to drm_connector_attach_encoder(). The * driver must also set the &drm_connector.encoder field to point to the * attached encoder. * * For connectors which are not fixed (like built-in panels) the driver needs to * support hotplug notifications. The simplest way to do that is by using the * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have * hardware support for hotplug interrupts. Connectors with hardware hotplug * support can instead use e.g. drm_helper_hpd_irq_event(). */ struct drm_conn_prop_enum_list { int type; const char *name; struct ida ida; }; /* * Connector and encoder types. */ static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, { DRM_MODE_CONNECTOR_VGA, "VGA" }, { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, { DRM_MODE_CONNECTOR_Composite, "Composite" }, { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, { DRM_MODE_CONNECTOR_Component, "Component" }, { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, { DRM_MODE_CONNECTOR_TV, "TV" }, { DRM_MODE_CONNECTOR_eDP, "eDP" }, { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, { DRM_MODE_CONNECTOR_DSI, "DSI" }, { DRM_MODE_CONNECTOR_DPI, "DPI" }, { DRM_MODE_CONNECTOR_WRITEBACK, "Writeback" }, }; 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_connector_get_cmdline_mode - reads the user's cmdline mode * @connector: connector to quwery * * The kernel supports per-connector configuration of its consoles through * use of the video= parameter. This function parses that option and * extracts the user's specified mode (or enable/disable status) for a * particular connector. This is typically only used during the early fbdev * setup. */ static void drm_connector_get_cmdline_mode(struct drm_connector *connector) { struct drm_cmdline_mode *mode = &connector->cmdline_mode; char *option = NULL; if (fb_get_options(connector->name, &option)) return; if (!drm_mode_parse_command_line_for_connector(option, connector, mode)) return; if (mode->force) { DRM_INFO("forcing %s connector %s\n", connector->name, drm_get_connector_force_name(mode->force)); connector->force = mode->force; } DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", connector->name, mode->xres, mode->yres, mode->refresh_specified ? mode->refresh : 60, mode->rb ? " reduced blanking" : "", mode->margins ? " with margins" : "", mode->interlace ? " interlaced" : ""); } static void drm_connector_free(struct kref *kref) { struct drm_connector *connector = container_of(kref, struct drm_connector, base.refcount); struct drm_device *dev = connector->dev; drm_mode_object_unregister(dev, &connector->base); connector->funcs->destroy(connector); } void drm_connector_free_work_fn(struct work_struct *work) { struct drm_connector *connector, *n; struct drm_device *dev = container_of(work, struct drm_device, mode_config.connector_free_work); struct drm_mode_config *config = &dev->mode_config; unsigned long flags; struct llist_node *freed; spin_lock_irqsave(&config->connector_list_lock, flags); freed = llist_del_all(&config->connector_free_list); spin_unlock_irqrestore(&config->connector_list_lock, flags); llist_for_each_entry_safe(connector, n, freed, free_node) { drm_mode_object_unregister(dev, &connector->base); connector->funcs->destroy(connector); } } /** * drm_connector_init - Init a preallocated connector * @dev: DRM device * @connector: the connector to init * @funcs: callbacks for this connector * @connector_type: user visible type of the connector * * Initialises a preallocated connector. Connectors should be * subclassed as part of driver connector objects. * * Returns: * Zero on success, error code on failure. */ int drm_connector_init(struct drm_device *dev, struct drm_connector *connector, const struct drm_connector_funcs *funcs, int connector_type) { struct drm_mode_config *config = &dev->mode_config; int ret; struct ida *connector_ida = &drm_connector_enum_list[connector_type].ida; WARN_ON(drm_drv_uses_atomic_modeset(dev) && (!funcs->atomic_destroy_state || !funcs->atomic_duplicate_state)); ret = __drm_mode_object_add(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false, drm_connector_free); if (ret) return ret; connector->base.properties = &connector->properties; connector->dev = dev; connector->funcs = funcs; /* connector index is used with 32bit bitmasks */ ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL); if (ret < 0) { DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n", drm_connector_enum_list[connector_type].name, ret); goto out_put; } connector->index = ret; ret = 0; connector->connector_type = connector_type; connector->connector_type_id = ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); if (connector->connector_type_id < 0) { ret = connector->connector_type_id; goto out_put_id; } connector->name = kasprintf(GFP_KERNEL, "%s-%d", drm_connector_enum_list[connector_type].name, connector->connector_type_id); if (!connector->name) { ret = -ENOMEM; goto out_put_type_id; } INIT_LIST_HEAD(&connector->probed_modes); INIT_LIST_HEAD(&connector->modes); mutex_init(&connector->mutex); connector->edid_blob_ptr = NULL; connector->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); if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); } connector->debugfs_entry = NULL; out_put_type_id: if (ret) ida_simple_remove(connector_ida, connector->connector_type_id); out_put_id: if (ret) ida_simple_remove(&config->connector_ida, connector->index); out_put: if (ret) drm_mode_object_unregister(dev, &connector->base); return ret; } EXPORT_SYMBOL(drm_connector_init); /** * drm_connector_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) { int i; /* * 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; for (i = 0; i < ARRAY_SIZE(connector->encoder_ids); i++) { if (connector->encoder_ids[i] == 0) { connector->encoder_ids[i] = encoder->base.id; return 0; } } return -ENOMEM; } EXPORT_SYMBOL(drm_connector_attach_encoder); /** * drm_connector_has_possible_encoder - check if the connector and encoder are assosicated 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) { struct drm_encoder *enc; int i; drm_connector_for_each_possible_encoder(connector, enc, i) { if (enc == encoder) return true; } return false; } EXPORT_SYMBOL(drm_connector_has_possible_encoder); static void drm_mode_remove(struct drm_connector *connector, struct drm_display_mode *mode) { list_del(&mode->head); drm_mode_destroy(connector->dev, mode); } /** * drm_connector_cleanup - cleans up an initialised connector * @connector: connector to cleanup * * Cleans up the connector but doesn't free the object. */ void drm_connector_cleanup(struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct drm_display_mode *mode, *t; /* The connector should have been removed from userspace long before * it is finally destroyed. */ if (WARN_ON(connector->registration_state == DRM_CONNECTOR_REGISTERED)) drm_connector_unregister(connector); if (connector->tile_group) { drm_mode_put_tile_group(dev, connector->tile_group); connector->tile_group = NULL; } list_for_each_entry_safe(mode, t, &connector->probed_modes, head) drm_mode_remove(connector, mode); list_for_each_entry_safe(mode, t, &connector->modes, head) drm_mode_remove(connector, mode); ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida, connector->connector_type_id); ida_simple_remove(&dev->mode_config.connector_ida, connector->index); kfree(connector->display_info.bus_formats); drm_mode_object_unregister(dev, &connector->base); kfree(connector->name); connector->name = NULL; spin_lock_irq(&dev->mode_config.connector_list_lock); list_del(&connector->head); dev->mode_config.num_connector--; spin_unlock_irq(&dev->mode_config.connector_list_lock); WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); if (connector->state && connector->funcs->atomic_destroy_state) connector->funcs->atomic_destroy_state(connector, connector->state); mutex_destroy(&connector->mutex); memset(connector, 0, sizeof(*connector)); } EXPORT_SYMBOL(drm_connector_cleanup); /** * drm_connector_register - register a connector * @connector: the connector to register * * Register userspace interfaces for a connector * * 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; ret = drm_debugfs_connector_add(connector); if (ret) { goto err_sysfs; } if (connector->funcs->late_register) { ret = connector->funcs->late_register(connector); if (ret) goto err_debugfs; } drm_mode_object_register(connector->dev, &connector->base); connector->registration_state = DRM_CONNECTOR_REGISTERED; goto unlock; err_debugfs: drm_debugfs_connector_remove(connector); err_sysfs: 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 */ void drm_connector_unregister(struct drm_connector *connector) { mutex_lock(&connector->mutex); if (connector->registration_state != DRM_CONNECTOR_REGISTERED) { mutex_unlock(&connector->mutex); return; } if (connector->funcs->early_unregister) connector->funcs->early_unregister(connector); drm_sysfs_connector_remove(connector); drm_debugfs_connector_remove(connector); connector->registration_state = DRM_CONNECTOR_UNREGISTERED; mutex_unlock(&connector->mutex); } EXPORT_SYMBOL(drm_connector_unregister); void drm_connector_unregister_all(struct drm_device *dev) { struct drm_connector *connector; struct drm_connector_list_iter conn_iter; drm_connector_list_iter_begin(dev, &conn_iter); drm_for_each_connector_iter(connector, &conn_iter) drm_connector_unregister(connector); drm_connector_list_iter_end(&conn_iter); } int drm_connector_register_all(struct drm_device *dev) { struct drm_connector *connector; struct drm_connector_list_iter conn_iter; int ret = 0; drm_connector_list_iter_begin(dev, &conn_iter); drm_for_each_connector_iter(connector, &conn_iter) { ret = drm_connector_register(connector); if (ret) break; } drm_connector_list_iter_end(&conn_iter); if (ret) drm_connector_unregister_all(dev); return ret; } /** * drm_get_connector_status_name - return a string for connector status * @status: connector status to compute name of * * In contrast to the other drm_get_*_name functions this one here returns a * const pointer and hence is threadsafe. */ const char *drm_get_connector_status_name(enum drm_connector_status status) { if (status == connector_status_connected) return "connected"; else if (status == connector_status_disconnected) return "disconnected"; else return "unknown"; } EXPORT_SYMBOL(drm_get_connector_status_name); /** * drm_get_connector_force_name - return a string for connector force * @force: connector force to get name of * * Returns: const pointer to name. */ const char *drm_get_connector_force_name(enum drm_connector_force force) { switch (force) { case DRM_FORCE_UNSPECIFIED: return "unspecified"; case DRM_FORCE_OFF: return "off"; case DRM_FORCE_ON: return "on"; case DRM_FORCE_ON_DIGITAL: return "digital"; default: return "unknown"; } } #ifdef CONFIG_LOCKDEP static struct lockdep_map connector_list_iter_dep_map = { .name = "drm_connector_list_iter" }; #endif /** * drm_connector_list_iter_begin - initialize a connector_list iterator * @dev: DRM device * @iter: connector_list iterator * * Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter * must always be cleaned up again by calling drm_connector_list_iter_end(). * Iteration itself happens using drm_connector_list_iter_next() or * drm_for_each_connector_iter(). */ void drm_connector_list_iter_begin(struct drm_device *dev, struct drm_connector_list_iter *iter) { iter->dev = dev; iter->conn = NULL; lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_); } EXPORT_SYMBOL(drm_connector_list_iter_begin); /* * Extra-safe connector put function that works in any context. Should only be * used from the connector_iter functions, where we never really expect to * actually release the connector when dropping our final reference. */ static void __drm_connector_put_safe(struct drm_connector *conn) { struct drm_mode_config *config = &conn->dev->mode_config; lockdep_assert_held(&config->connector_list_lock); if (!refcount_dec_and_test(&conn->base.refcount.refcount)) return; llist_add(&conn->free_node, &config->connector_free_list); schedule_work(&config->connector_free_work); } /** * drm_connector_list_iter_next - return next connector * @iter: connector_list iterator * * Returns the next connector for @iter, or NULL when the list walk has * completed. */ struct drm_connector * drm_connector_list_iter_next(struct drm_connector_list_iter *iter) { struct drm_connector *old_conn = iter->conn; struct drm_mode_config *config = &iter->dev->mode_config; struct list_head *lhead; unsigned long flags; spin_lock_irqsave(&config->connector_list_lock, flags); lhead = old_conn ? &old_conn->head : &config->connector_list; do { if (lhead->next == &config->connector_list) { iter->conn = NULL; break; } lhead = lhead->next; iter->conn = list_entry(lhead, struct drm_connector, head); /* loop until it's not a zombie connector */ } while (!kref_get_unless_zero(&iter->conn->base.refcount)); if (old_conn) __drm_connector_put_safe(old_conn); spin_unlock_irqrestore(&config->connector_list_lock, flags); return iter->conn; } EXPORT_SYMBOL(drm_connector_list_iter_next); /** * drm_connector_list_iter_end - tear down a connector_list iterator * @iter: connector_list iterator * * Tears down @iter and releases any resources (like &drm_connector references) * acquired while walking the list. This must always be called, both when the * iteration completes fully or when it was aborted without walking the entire * list. */ void drm_connector_list_iter_end(struct drm_connector_list_iter *iter) { struct drm_mode_config *config = &iter->dev->mode_config; unsigned long flags; iter->dev = NULL; if (iter->conn) { spin_lock_irqsave(&config->connector_list_lock, flags); __drm_connector_put_safe(iter->conn); spin_unlock_irqrestore(&config->connector_list_lock, flags); } lock_release(&connector_list_iter_dep_map, 0, _RET_IP_); } EXPORT_SYMBOL(drm_connector_list_iter_end); static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { { SubPixelUnknown, "Unknown" }, { SubPixelHorizontalRGB, "Horizontal RGB" }, { SubPixelHorizontalBGR, "Horizontal BGR" }, { SubPixelVerticalRGB, "Vertical RGB" }, { SubPixelVerticalBGR, "Vertical BGR" }, { SubPixelNone, "None" }, }; /** * drm_get_subpixel_order_name - return a string for a given subpixel enum * @order: enum of subpixel_order * * Note you could abuse this and return something out of bounds, but that * would be a caller error. No unscrubbed user data should make it here. */ const char *drm_get_subpixel_order_name(enum subpixel_order order) { return drm_subpixel_enum_list[order].name; } EXPORT_SYMBOL(drm_get_subpixel_order_name); static const struct drm_prop_enum_list drm_dpms_enum_list[] = { { DRM_MODE_DPMS_ON, "On" }, { DRM_MODE_DPMS_STANDBY, "Standby" }, { DRM_MODE_DPMS_SUSPEND, "Suspend" }, { DRM_MODE_DPMS_OFF, "Off" } }; DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) static const struct drm_prop_enum_list drm_link_status_enum_list[] = { { DRM_MODE_LINK_STATUS_GOOD, "Good" }, { DRM_MODE_LINK_STATUS_BAD, "Bad" }, }; /** * drm_display_info_set_bus_formats - set the supported bus formats * @info: display info to store bus formats in * @formats: array containing the supported bus formats * @num_formats: the number of entries in the fmts array * * Store the supported bus formats in display info structure. * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for * a full list of available formats. */ int drm_display_info_set_bus_formats(struct drm_display_info *info, const u32 *formats, unsigned int num_formats) { u32 *fmts = NULL; if (!formats && num_formats) return -EINVAL; if (formats && num_formats) { fmts = kmemdup(formats, sizeof(*formats) * num_formats, GFP_KERNEL); if (!fmts) return -ENOMEM; } kfree(info->bus_formats); info->bus_formats = fmts; info->num_bus_formats = num_formats; return 0; } EXPORT_SYMBOL(drm_display_info_set_bus_formats); /* Optional connector properties. */ static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { { DRM_MODE_SCALE_NONE, "None" }, { DRM_MODE_SCALE_FULLSCREEN, "Full" }, { DRM_MODE_SCALE_CENTER, "Center" }, { DRM_MODE_SCALE_ASPECT, "Full aspect" }, }; static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, }; static const struct drm_prop_enum_list drm_content_type_enum_list[] = { { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" }, { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" }, { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" }, { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" }, { DRM_MODE_CONTENT_TYPE_GAME, "Game" }, }; static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = { { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" }, { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" }, { DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" }, { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" }, }; static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ }; DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I 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_subconnector_name, drm_dvi_i_subconnector_enum_list) static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ }; DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I 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_subconnector_name, drm_tv_subconnector_enum_list) static struct drm_prop_enum_list drm_cp_enum_list[] = { { DRM_MODE_CONTENT_PROTECTION_UNDESIRED, "Undesired" }, { DRM_MODE_CONTENT_PROTECTION_DESIRED, "Desired" }, { DRM_MODE_CONTENT_PROTECTION_ENABLED, "Enabled" }, }; DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list) /** * DOC: standard connector properties * * DRM connectors have a few standardized properties: * * EDID: * Blob property which contains the current EDID read from the sink. This * is useful to parse sink identification information like vendor, model * and serial. Drivers should update this property by calling * drm_connector_update_edid_property(), usually after having parsed * the EDID using drm_add_edid_modes(). Userspace cannot change this * property. * DPMS: * Legacy property for setting the power state of the connector. For atomic * drivers this is only provided for backwards compatibility with existing * drivers, it remaps to controlling the "ACTIVE" property on the CRTC the * connector is linked to. Drivers should never set this property directly, * it is handled by the DRM core by calling the &drm_connector_funcs.dpms * callback. For atomic drivers the remapping to the "ACTIVE" property is * implemented in the DRM core. This is the only standard connector * property that userspace can change. * * Note that this property cannot be set through the MODE_ATOMIC ioctl, * userspace must use "ACTIVE" on the CRTC instead. * * WARNING: * * For userspace also running on legacy drivers the "DPMS" semantics are a * lot more complicated. First, userspace cannot rely on the "DPMS" value * returned by the GETCONNECTOR actually reflecting reality, because many * drivers fail to update it. For atomic drivers this is taken care of in * drm_atomic_helper_update_legacy_modeset_state(). * * The second issue is that the DPMS state is only well-defined when the * connector is connected to a CRTC. In atomic the DRM core enforces that * "ACTIVE" is off in such a case, no such checks exists for "DPMS". * * Finally, when enabling an output using the legacy SETCONFIG ioctl then * "DPMS" is forced to ON. But see above, that might not be reflected in * the software value on legacy drivers. * * Summarizing: Only set "DPMS" when the connector is known to be enabled, * assume that a successful SETCONFIG call also sets "DPMS" to on, and * never read back the value of "DPMS" because it can be incorrect. * PATH: * Connector path property to identify how this sink is physically * connected. Used by DP MST. This should be set by calling * drm_connector_set_path_property(), in the case of DP MST with the * path property the MST manager created. Userspace cannot change this * property. * TILE: * Connector tile group property to indicate how a set of DRM connector * compose together into one logical screen. This is used by both high-res * external screens (often only using a single cable, but exposing multiple * DP MST sinks), or high-res integrated panels (like dual-link DSI) which * are not gen-locked. Note that for tiled panels which are genlocked, like * dual-link LVDS or dual-link DSI, the driver should try to not expose the * tiling and virtualize 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(). * 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.. * - Userspace is responsible for polling the property 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). * * 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_init_panel_orientation_property(). * * 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). */ 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; return 0; } /** * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties * @dev: DRM device * * Called by a driver the first time a DVI-I connector is made. */ int drm_mode_create_dvi_i_properties(struct drm_device *dev) { struct drm_property *dvi_i_selector; struct drm_property *dvi_i_subconnector; if (dev->mode_config.dvi_i_select_subconnector_property) return 0; dvi_i_selector = drm_property_create_enum(dev, 0, "select subconnector", drm_dvi_i_select_enum_list, ARRAY_SIZE(drm_dvi_i_select_enum_list)); dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, "subconnector", drm_dvi_i_subconnector_enum_list, ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; return 0; } EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); /** * 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 it's display * settings accordingly. * * The value of this property can be one of the following: * * No Data: * Content type is unknown * Graphics: * Content type is graphics * Photo: * Content type is photo * Cinema: * Content type is cinema * Game: * Content type is game * * Drivers can set up this property by calling * drm_connector_attach_content_type_property(). Decoding to * infoframe values is done through drm_hdmi_avi_infoframe_content_type(). */ /** * drm_connector_attach_content_type_property - attach content-type property * @connector: connector to attach content type property on. * * Called by a driver the first time a HDMI connector is made. */ int drm_connector_attach_content_type_property(struct drm_connector *connector) { if (!drm_mode_create_content_type_property(connector->dev)) drm_object_attach_property(&connector->base, connector->dev->mode_config.content_type_property, DRM_MODE_CONTENT_TYPE_NO_DATA); return 0; } EXPORT_SYMBOL(drm_connector_attach_content_type_property); /** * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe * content type information, based * on correspondent DRM property. * @frame: HDMI AVI infoframe * @conn_state: DRM display connector state * */ void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame, const struct drm_connector_state *conn_state) { switch (conn_state->content_type) { case DRM_MODE_CONTENT_TYPE_GRAPHICS: frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; break; case DRM_MODE_CONTENT_TYPE_CINEMA: frame->content_type = HDMI_CONTENT_TYPE_CINEMA; break; case DRM_MODE_CONTENT_TYPE_GAME: frame->content_type = HDMI_CONTENT_TYPE_GAME; break; case DRM_MODE_CONTENT_TYPE_PHOTO: frame->content_type = HDMI_CONTENT_TYPE_PHOTO; break; default: /* Graphics is the default(0) */ frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; } frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA; } EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type); /** * drm_create_tv_properties - create TV specific connector properties * @dev: DRM device * @num_modes: number of different TV formats (modes) supported * @modes: array of pointers to strings containing name of each format * * Called by a driver's TV initialization routine, this function creates * the TV specific connector properties for a given device. Caller is * responsible for allocating a list of format names and passing them to * this routine. */ int drm_mode_create_tv_properties(struct drm_device *dev, unsigned int num_modes, const char * const modes[]) { struct drm_property *tv_selector; struct drm_property *tv_subconnector; unsigned int i; if (dev->mode_config.tv_select_subconnector_property) return 0; /* * Basic connector properties */ tv_selector = drm_property_create_enum(dev, 0, "select subconnector", drm_tv_select_enum_list, ARRAY_SIZE(drm_tv_select_enum_list)); if (!tv_selector) goto nomem; dev->mode_config.tv_select_subconnector_property = tv_selector; tv_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, "subconnector", drm_tv_subconnector_enum_list, ARRAY_SIZE(drm_tv_subconnector_enum_list)); if (!tv_subconnector) goto nomem; dev->mode_config.tv_subconnector_property = tv_subconnector; /* * Other, TV specific properties: margins & TV modes. */ 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) goto nomem; 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) goto nomem; 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) goto nomem; 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) goto nomem; dev->mode_config.tv_mode_property = drm_property_create(dev, DRM_MODE_PROP_ENUM, "mode", num_modes); if (!dev->mode_config.tv_mode_property) goto nomem; for (i = 0; i < num_modes; i++) drm_property_add_enum(dev->mode_config.tv_mode_property, i, modes[i]); dev->mode_config.tv_brightness_property = drm_property_create_range(dev, 0, "brightness", 0, 100); if (!dev->mode_config.tv_brightness_property) goto nomem; dev->mode_config.tv_contrast_property = drm_property_create_range(dev, 0, "contrast", 0, 100); if (!dev->mode_config.tv_contrast_property) goto nomem; dev->mode_config.tv_flicker_reduction_property = drm_property_create_range(dev, 0, "flicker reduction", 0, 100); if (!dev->mode_config.tv_flicker_reduction_property) goto nomem; dev->mode_config.tv_overscan_property = drm_property_create_range(dev, 0, "overscan", 0, 100); if (!dev->mode_config.tv_overscan_property) goto nomem; dev->mode_config.tv_saturation_property = drm_property_create_range(dev, 0, "saturation", 0, 100); if (!dev->mode_config.tv_saturation_property) goto nomem; dev->mode_config.tv_hue_property = drm_property_create_range(dev, 0, "hue", 0, 100); if (!dev->mode_config.tv_hue_property) goto nomem; return 0; nomem: return -ENOMEM; } EXPORT_SYMBOL(drm_mode_create_tv_properties); /** * drm_mode_create_scaling_mode_property - create scaling mode property * @dev: DRM device * * Called by a driver the first time it's needed, must be attached to desired * connectors. * * Atomic drivers should use drm_connector_attach_scaling_mode_property() * instead to correctly assign &drm_connector_state.picture_aspect_ratio * in the atomic state. */ int drm_mode_create_scaling_mode_property(struct drm_device *dev) { struct drm_property *scaling_mode; if (dev->mode_config.scaling_mode_property) return 0; scaling_mode = drm_property_create_enum(dev, 0, "scaling mode", drm_scaling_mode_enum_list, ARRAY_SIZE(drm_scaling_mode_enum_list)); dev->mode_config.scaling_mode_property = scaling_mode; return 0; } EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); /** * DOC: Variable refresh properties * * Variable refresh rate capable displays can dynamically adjust their * refresh rate by extending the duration of their vertical front porch * until page flip or timeout occurs. This can reduce or remove stuttering * and latency in scenarios where the page flip does not align with the * vblank interval. * * An example scenario would be an application flipping at a constant rate * of 48Hz on a 60Hz display. The page flip will frequently miss the vblank * interval and the same contents will be displayed twice. This can be * observed as stuttering for content with motion. * * If variable refresh rate was active on a display that supported a * variable refresh range from 35Hz to 60Hz no stuttering would be observable * for the example scenario. The minimum supported variable refresh rate of * 35Hz is below the page flip frequency and the vertical front porch can * be extended until the page flip occurs. The vblank interval will be * directly aligned to the page flip rate. * * Not all userspace content is suitable for use with variable refresh rate. * Large and frequent changes in vertical front porch duration may worsen * perceived stuttering for input sensitive applications. * * Panel brightness will also vary with vertical front porch duration. Some * panels may have noticeable differences in brightness between the minimum * vertical front porch duration and the maximum vertical front porch duration. * Large and frequent changes in vertical front porch duration may produce * observable flickering for such panels. * * Userspace control for variable refresh rate is supported via properties * on the &drm_connector and &drm_crtc objects. * * "vrr_capable": * Optional &drm_connector boolean property that drivers should attach * with drm_connector_attach_vrr_capable_property() on connectors that * could support variable refresh rates. Drivers should update the * property value by calling drm_connector_set_vrr_capable_property(). * * Absence of the property should indicate absence of support. * * "vrr_enabled": * Default &drm_crtc boolean property that notifies the driver that the * content on the CRTC is suitable for variable refresh rate presentation. * The driver will take this property as a hint to enable variable * refresh rate support if the receiver supports it, ie. if the * "vrr_capable" property is true on the &drm_connector object. The * vertical front porch duration will be extended until page-flip or * timeout when enabled. * * The minimum vertical front porch duration is defined as the vertical * front porch duration for the current mode. * * The maximum vertical front porch duration is greater than or equal to * the minimum vertical front porch duration. The duration is derived * from the minimum supported variable refresh rate for the connector. * * The driver may place further restrictions within these minimum * and maximum bounds. * * The semantics for the vertical blank timestamp differ when * variable refresh rate is active. The vertical blank timestamp * is defined to be an estimate using the current mode's fixed * refresh rate timings. The semantics for the page-flip event * timestamp remain the same. */ /** * 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 errono on failure. */ int drm_connector_attach_vrr_capable_property( struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct drm_property *prop; if (!connector->vrr_capable_property) { prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "vrr_capable"); if (!prop) return -ENOMEM; connector->vrr_capable_property = prop; drm_object_attach_property(&connector->base, prop, 0); } return 0; } EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property); /** * drm_connector_attach_scaling_mode_property - attach atomic scaling mode property * @connector: connector to attach scaling mode property on. * @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*). * * This is used to add support for scaling mode to atomic drivers. * The scaling mode will be set to &drm_connector_state.picture_aspect_ratio * and can be used from &drm_connector_helper_funcs->atomic_check for validation. * * This is the atomic version of drm_mode_create_scaling_mode_property(). * * Returns: * Zero on success, negative errno on failure. */ int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, u32 scaling_mode_mask) { struct drm_device *dev = connector->dev; struct drm_property *scaling_mode_property; int i; const unsigned valid_scaling_mode_mask = (1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1; if (WARN_ON(hweight32(scaling_mode_mask) < 2 || scaling_mode_mask & ~valid_scaling_mode_mask)) return -EINVAL; scaling_mode_property = drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode", hweight32(scaling_mode_mask)); if (!scaling_mode_property) return -ENOMEM; for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) { int ret; if (!(BIT(i) & scaling_mode_mask)) continue; ret = drm_property_add_enum(scaling_mode_property, drm_scaling_mode_enum_list[i].type, drm_scaling_mode_enum_list[i].name); if (ret) { drm_property_destroy(dev, scaling_mode_property); return ret; } } drm_object_attach_property(&connector->base, scaling_mode_property, 0); connector->scaling_mode_property = scaling_mode_property; return 0; } EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property); /** * drm_connector_attach_content_protection_property - attach content protection * property * * @connector: connector to attach CP property on. * * This is used to add support for content protection on select connectors. * Content Protection is intentionally vague to allow for different underlying * technologies, however it is most implemented by HDCP. * * The content protection will be set to &drm_connector_state.content_protection * * Returns: * Zero on success, negative errno on failure. */ int drm_connector_attach_content_protection_property( struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct drm_property *prop; prop = drm_property_create_enum(dev, 0, "Content Protection", drm_cp_enum_list, ARRAY_SIZE(drm_cp_enum_list)); if (!prop) return -ENOMEM; drm_object_attach_property(&connector->base, prop, DRM_MODE_CONTENT_PROTECTION_UNDESIRED); connector->content_protection_property = prop; return 0; } EXPORT_SYMBOL(drm_connector_attach_content_protection_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); /** * 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 the suggested x/y offset property for connectors. */ int drm_mode_create_suggested_offset_properties(struct drm_device *dev) { if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) return 0; dev->mode_config.suggested_x_property = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); dev->mode_config.suggested_y_property = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); if (dev->mode_config.suggested_x_property == NULL || dev->mode_config.suggested_y_property == NULL) return -ENOMEM; return 0; } EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); /** * drm_connector_set_path_property - set tile property on connector * @connector: connector to set property on. * @path: path to use for property; must not be NULL. * * This creates a property to expose to userspace to specify a * connector path. This is mainly used for DisplayPort MST where * connectors have a topology and we want to allow userspace to give * them more meaningful names. * * Returns: * Zero on success, negative errno on failure. */ int drm_connector_set_path_property(struct drm_connector *connector, const char *path) { struct drm_device *dev = connector->dev; int ret; ret = drm_property_replace_global_blob(dev, &connector->path_blob_ptr, strlen(path) + 1, path, &connector->base, dev->mode_config.path_property); return ret; } EXPORT_SYMBOL(drm_connector_set_path_property); /** * drm_connector_set_tile_property - set tile property on connector * @connector: connector to set property on. * * This looks up the tile information for a connector, and creates a * property for userspace to parse if it exists. The property is of * the form of 8 integers using ':' as a separator. * * Returns: * Zero on success, errno on failure. */ int drm_connector_set_tile_property(struct drm_connector *connector) { struct drm_device *dev = connector->dev; char tile[256]; int ret; if (!connector->has_tile) { ret = drm_property_replace_global_blob(dev, &connector->tile_blob_ptr, 0, NULL, &connector->base, dev->mode_config.tile_property); return ret; } snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", connector->tile_group->id, connector->tile_is_single_monitor, connector->num_h_tile, connector->num_v_tile, connector->tile_h_loc, connector->tile_v_loc, connector->tile_h_size, connector->tile_v_size); ret = drm_property_replace_global_blob(dev, &connector->tile_blob_ptr, strlen(tile) + 1, tile, &connector->base, dev->mode_config.tile_property); return ret; } EXPORT_SYMBOL(drm_connector_set_tile_property); /** * drm_connector_update_edid_property - update the edid property of a connector * @connector: drm connector * @edid: new value of the edid property * * This function creates a new blob modeset object and assigns its id to the * connector's edid property. * * Returns: * Zero on success, negative errno on failure. */ int drm_connector_update_edid_property(struct drm_connector *connector, const struct edid *edid) { struct drm_device *dev = connector->dev; size_t size = 0; int ret; /* ignore requests to set edid when overridden */ if (connector->override_edid) return 0; if (edid) size = EDID_LENGTH * (1 + edid->extensions); /* Set the display info, using edid if available, otherwise * reseting the values to defaults. This duplicates the work * done in drm_add_edid_modes, but that function is not * consistently called before this one in all drivers and the * computation is cheap enough that it seems better to * duplicate it rather than attempt to ensure some arbitrary * ordering of calls. */ if (edid) drm_add_display_info(connector, edid); else drm_reset_display_info(connector); drm_object_property_set_value(&connector->base, dev->mode_config.non_desktop_property, connector->display_info.non_desktop); ret = drm_property_replace_global_blob(dev, &connector->edid_blob_ptr, size, edid, &connector->base, dev->mode_config.edid_property); return ret; } EXPORT_SYMBOL(drm_connector_update_edid_property); /** * drm_connector_set_link_status_property - Set link status property of a connector * @connector: drm connector * @link_status: new value of link status property (0: Good, 1: Bad) * * In usual working scenario, this link status property will always be set to * "GOOD". If something fails during or after a mode set, the kernel driver * may set this link status property to "BAD". The caller then needs to send a * hotplug uevent for userspace to re-check the valid modes through * GET_CONNECTOR_IOCTL and retry modeset. * * Note: Drivers cannot rely on userspace to support this property and * issue a modeset. As such, they may choose to handle issues (like * re-training a link) without userspace's intervention. * * The reason for adding this property is to handle link training failures, but * it is not limited to DP or link training. For example, if we implement * asynchronous setcrtc, this property can be used to report any failures in that. */ void drm_connector_set_link_status_property(struct drm_connector *connector, uint64_t link_status) { struct drm_device *dev = connector->dev; drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); connector->state->link_status = link_status; drm_modeset_unlock(&dev->mode_config.connection_mutex); } EXPORT_SYMBOL(drm_connector_set_link_status_property); /** * drm_connector_attach_max_bpc_property - attach "max bpc" property * @connector: connector to attach max bpc property on. * @min: The minimum bit depth supported by the connector. * @max: The maximum bit depth supported by the connector. * * This is used to add support for limiting the bit depth on a connector. * * Returns: * Zero on success, negative errno on failure. */ int drm_connector_attach_max_bpc_property(struct drm_connector *connector, int min, int max) { struct drm_device *dev = connector->dev; struct drm_property *prop; prop = connector->max_bpc_property; if (!prop) { prop = drm_property_create_range(dev, 0, "max bpc", min, max); if (!prop) return -ENOMEM; connector->max_bpc_property = prop; } drm_object_attach_property(&connector->base, prop, max); connector->state->max_requested_bpc = max; connector->state->max_bpc = max; return 0; } EXPORT_SYMBOL(drm_connector_attach_max_bpc_property); /** * drm_connector_set_vrr_capable_property - sets the variable refresh rate * capable property for a connector * @connector: drm connector * @capable: True if the connector is variable refresh rate capable * * Should be used by atomic drivers to update the indicated support for * variable refresh rate over a connector. */ void drm_connector_set_vrr_capable_property( struct drm_connector *connector, bool capable) { drm_object_property_set_value(&connector->base, connector->vrr_capable_property, capable); } EXPORT_SYMBOL(drm_connector_set_vrr_capable_property); /** * drm_connector_init_panel_orientation_property - * initialize the connecters panel_orientation property * @connector: connector for which to init the panel-orientation property. * @width: width in pixels of the panel, used for panel quirk detection * @height: height in pixels of the panel, used for panel quirk detection * * This function should only be called for built-in panels, after setting * connector->display_info.panel_orientation first (if known). * * This function will check for platform specific (e.g. DMI based) quirks * overriding display_info.panel_orientation first, then if panel_orientation * is not DRM_MODE_PANEL_ORIENTATION_UNKNOWN it will attach the * "panel orientation" property to the connector. * * Returns: * Zero on success, negative errno on failure. */ int drm_connector_init_panel_orientation_property( struct drm_connector *connector, int width, int height) { struct drm_device *dev = connector->dev; struct drm_display_info *info = &connector->display_info; struct drm_property *prop; int orientation_quirk; orientation_quirk = drm_get_panel_orientation_quirk(width, height); if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) info->panel_orientation = orientation_quirk; if (info->panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN) return 0; 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_init_panel_orientation_property); 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 *export_list, 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) { struct drm_display_mode *mode_itr; list_for_each_entry(mode_itr, export_list, export_head) if (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; int i; struct drm_mode_modeinfo u_mode; struct drm_mode_modeinfo __user *mode_ptr; uint32_t __user *encoder_ptr; LIST_HEAD(export_list); 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; drm_connector_for_each_possible_encoder(connector, encoder, i) encoders_count++; 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, i) { if (put_user(encoder->base.id, encoder_ptr + copied)) { ret = -EFAULT; goto out; } copied++; } } out_resp->count_encoders = encoders_count; out_resp->connector_id = connector->base.id; out_resp->connector_type = connector->connector_type; out_resp->connector_type_id = connector->connector_type_id; mutex_lock(&dev->mode_config.mutex); if (out_resp->count_modes == 0) { connector->funcs->fill_modes(connector, dev->mode_config.max_width, dev->mode_config.max_height); } out_resp->mm_width = connector->display_info.width_mm; out_resp->mm_height = connector->display_info.height_mm; out_resp->subpixel = connector->display_info.subpixel_order; out_resp->connection = connector->status; /* delayed so we get modes regardless of pre-fill_modes state */ list_for_each_entry(mode, &connector->modes, head) if (drm_mode_expose_to_userspace(mode, &export_list, file_priv)) { list_add_tail(&mode->export_head, &export_list); mode_count++; } /* * This ioctl is called twice, once to determine how much space is * needed, and the 2nd time to fill it. * The modes that need to be exposed to the user are maintained in the * 'export_list'. When the ioctl is called first time to determine the, * space, the export_list gets filled, to find the no.of modes. In the * 2nd time, the user modes are filled, one by one from the export_list. */ 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, &export_list, export_head) { 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; mutex_unlock(&dev->mode_config.mutex); goto out; } copied++; } } out_resp->count_modes = mode_count; mutex_unlock(&dev->mode_config.mutex); drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); encoder = drm_connector_get_encoder(connector); if (encoder) out_resp->encoder_id = encoder->base.id; else out_resp->encoder_id = 0; /* Only grab properties after probing, to make sure EDID and other * properties reflect the latest status. */ ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic, (uint32_t __user *)(unsigned long)(out_resp->props_ptr), (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), &out_resp->count_props); drm_modeset_unlock(&dev->mode_config.connection_mutex); out: drm_connector_put(connector); return ret; } /** * DOC: Tile group * * Tile groups are used to represent tiled monitors with a unique integer * identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle, * we store this in a tile group, so we have a common identifier for all tiles * in a monitor group. The property is called "TILE". Drivers can manage tile * groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and * drm_mode_get_tile_group(). But this is only needed for internal panels where * the tile group information is exposed through a non-standard way. */ static void drm_tile_group_free(struct kref *kref) { struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); struct drm_device *dev = tg->dev; mutex_lock(&dev->mode_config.idr_mutex); idr_remove(&dev->mode_config.tile_idr, tg->id); mutex_unlock(&dev->mode_config.idr_mutex); kfree(tg); } /** * drm_mode_put_tile_group - drop a reference to a tile group. * @dev: DRM device * @tg: tile group to drop reference to. * * drop reference to tile group and free if 0. */ void drm_mode_put_tile_group(struct drm_device *dev, struct drm_tile_group *tg) { kref_put(&tg->refcount, drm_tile_group_free); } EXPORT_SYMBOL(drm_mode_put_tile_group); /** * drm_mode_get_tile_group - get a reference to an existing tile group * @dev: DRM device * @topology: 8-bytes unique per monitor. * * Use the unique bytes to get a reference to an existing tile group. * * RETURNS: * tile group or NULL if not found. */ struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 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 error. */ struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, char topology[8]) { struct drm_tile_group *tg; int ret; tg = kzalloc(sizeof(*tg), GFP_KERNEL); if (!tg) return ERR_PTR(-ENOMEM); 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 = ERR_PTR(ret); } mutex_unlock(&dev->mode_config.idr_mutex); return tg; } EXPORT_SYMBOL(drm_mode_create_tile_group);
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