diff options
Diffstat (limited to 'drivers/gpu/drm/drm_connector.c')
| -rw-r--r-- | drivers/gpu/drm/drm_connector.c | 1930 |
1 files changed, 1930 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c new file mode 100644 index 000000000..7bb68ca4a --- /dev/null +++ b/drivers/gpu/drm/drm_connector.c @@ -0,0 +1,1930 @@ +/* + * 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/drmP.h> +#include <drm/drm_connector.h> +#include <drm/drm_edid.h> +#include <drm/drm_encoder.h> +#include <drm/drm_utils.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_object_attach_property(&connector->base, + config->edid_property, + 0); + + 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_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). + * + * 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); + +/** + * 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_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 -EINVAL; + + 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); |