diff options
Diffstat (limited to 'drivers/gpu/drm/drm_connector.c')
| -rw-r--r-- | drivers/gpu/drm/drm_connector.c | 132 |
1 files changed, 96 insertions, 36 deletions
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 45464c8b797d..9f847615ac74 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -35,8 +35,8 @@ * 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_reference() and - * drm_connector_unreference(). + * 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 @@ -128,22 +128,8 @@ static void drm_connector_get_cmdline_mode(struct drm_connector *connector) return; if (mode->force) { - const char *s; - - switch (mode->force) { - case DRM_FORCE_OFF: - s = "OFF"; - break; - case DRM_FORCE_ON_DIGITAL: - s = "ON - dig"; - break; - default: - case DRM_FORCE_ON: - s = "ON"; - break; - } - - DRM_INFO("forcing %s connector %s\n", connector->name, s); + DRM_INFO("forcing %s connector %s\n", connector->name, + drm_get_connector_force_name(mode->force)); connector->force = mode->force; } @@ -189,9 +175,9 @@ int drm_connector_init(struct drm_device *dev, struct ida *connector_ida = &drm_connector_enum_list[connector_type].ida; - ret = drm_mode_object_get_reg(dev, &connector->base, - DRM_MODE_OBJECT_CONNECTOR, - false, drm_connector_free); + ret = __drm_mode_object_add(dev, &connector->base, + DRM_MODE_OBJECT_CONNECTOR, + false, drm_connector_free); if (ret) return ret; @@ -244,6 +230,10 @@ int drm_connector_init(struct drm_device *dev, drm_object_attach_property(&connector->base, config->dpms_property, 0); + drm_object_attach_property(&connector->base, + config->link_status_property, + 0); + if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); } @@ -445,10 +435,10 @@ void drm_connector_unregister_all(struct drm_device *dev) struct drm_connector *connector; struct drm_connector_list_iter conn_iter; - drm_connector_list_iter_get(dev, &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_put(&conn_iter); + drm_connector_list_iter_end(&conn_iter); } int drm_connector_register_all(struct drm_device *dev) @@ -457,13 +447,13 @@ int drm_connector_register_all(struct drm_device *dev) struct drm_connector_list_iter conn_iter; int ret = 0; - drm_connector_list_iter_get(dev, &conn_iter); + 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_put(&conn_iter); + drm_connector_list_iter_end(&conn_iter); if (ret) drm_connector_unregister_all(dev); @@ -488,6 +478,28 @@ const char *drm_get_connector_status_name(enum drm_connector_status status) } 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" @@ -495,23 +507,23 @@ static struct lockdep_map connector_list_iter_dep_map = { #endif /** - * drm_connector_list_iter_get - initialize a connector_list iterator + * 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_put(). + * 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_get(struct drm_device *dev, - struct drm_connector_list_iter *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_get); +EXPORT_SYMBOL(drm_connector_list_iter_begin); /** * drm_connector_list_iter_next - return next connector @@ -545,14 +557,14 @@ drm_connector_list_iter_next(struct drm_connector_list_iter *iter) spin_unlock_irqrestore(&config->connector_list_lock, flags); if (old_conn) - drm_connector_unreference(old_conn); + drm_connector_put(old_conn); return iter->conn; } EXPORT_SYMBOL(drm_connector_list_iter_next); /** - * drm_connector_list_iter_put - tear down a connector_list iterator + * 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) @@ -560,14 +572,14 @@ EXPORT_SYMBOL(drm_connector_list_iter_next); * iteration completes fully or when it was aborted without walking the entire * list. */ -void drm_connector_list_iter_put(struct drm_connector_list_iter *iter) +void drm_connector_list_iter_end(struct drm_connector_list_iter *iter) { iter->dev = NULL; if (iter->conn) - drm_connector_unreference(iter->conn); + drm_connector_put(iter->conn); lock_release(&connector_list_iter_dep_map, 0, _RET_IP_); } -EXPORT_SYMBOL(drm_connector_list_iter_put); +EXPORT_SYMBOL(drm_connector_list_iter_end); static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { { SubPixelUnknown, "Unknown" }, @@ -599,6 +611,12 @@ static const struct drm_prop_enum_list drm_dpms_enum_list[] = { }; 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_ENUM_NAME_FN(drm_get_link_status_name, drm_link_status_enum_list) + /** * drm_display_info_set_bus_formats - set the supported bus formats * @info: display info to store bus formats in @@ -718,6 +736,11 @@ DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, * tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers * should update this value using drm_mode_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_mode_connector_set_link_status_property(). * * Connectors also have one standardized atomic property: * @@ -759,6 +782,13 @@ int drm_connector_create_standard_properties(struct drm_device *dev) 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; + return 0; } @@ -1088,6 +1118,36 @@ int drm_mode_connector_update_edid_property(struct drm_connector *connector, } EXPORT_SYMBOL(drm_mode_connector_update_edid_property); +/** + * drm_mode_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_mode_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_mode_connector_set_link_status_property); + int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, struct drm_property *property, uint64_t value) @@ -1249,7 +1309,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data, out: mutex_unlock(&dev->mode_config.mutex); out_unref: - drm_connector_unreference(connector); + drm_connector_put(connector); return ret; } |