diff options
| -rw-r--r-- | drivers/gpu/drm/drm_connector.c | 79 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_crtc_internal.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_sysfs.c | 87 | ||||
| -rw-r--r-- | drivers/usb/typec/altmodes/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/usb/typec/altmodes/displayport.c | 58 | ||||
| -rw-r--r-- | include/drm/drm_connector.h | 25 |
6 files changed, 217 insertions, 35 deletions
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 2ba257b1ae20..e0a30e0ee86a 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -65,6 +65,14 @@ * support can instead use e.g. drm_helper_hpd_irq_event(). */ +/* + * Global connector list for drm_connector_find_by_fwnode(). + * Note drm_connector_[un]register() first take connector->lock and then + * take the connector_list_lock. + */ +static DEFINE_MUTEX(connector_list_lock); +static LIST_HEAD(connector_list); + struct drm_conn_prop_enum_list { int type; const char *name; @@ -267,6 +275,7 @@ int drm_connector_init(struct drm_device *dev, goto out_put_type_id; } + INIT_LIST_HEAD(&connector->global_connector_list_entry); INIT_LIST_HEAD(&connector->probed_modes); INIT_LIST_HEAD(&connector->modes); mutex_init(&connector->mutex); @@ -474,6 +483,8 @@ void drm_connector_cleanup(struct drm_connector *connector) drm_mode_object_unregister(dev, &connector->base); kfree(connector->name); connector->name = NULL; + fwnode_handle_put(connector->fwnode); + connector->fwnode = NULL; spin_lock_irq(&dev->mode_config.connector_list_lock); list_del(&connector->head); dev->mode_config.num_connector--; @@ -532,6 +543,9 @@ int drm_connector_register(struct drm_connector *connector) /* Let userspace know we have a new connector */ drm_sysfs_hotplug_event(connector->dev); + mutex_lock(&connector_list_lock); + list_add_tail(&connector->global_connector_list_entry, &connector_list); + mutex_unlock(&connector_list_lock); goto unlock; err_debugfs: @@ -560,6 +574,10 @@ void drm_connector_unregister(struct drm_connector *connector) return; } + mutex_lock(&connector_list_lock); + list_del_init(&connector->global_connector_list_entry); + mutex_unlock(&connector_list_lock); + if (connector->funcs->early_unregister) connector->funcs->early_unregister(connector); @@ -2543,6 +2561,67 @@ out: return ret; } +/** + * drm_connector_find_by_fwnode - Find a connector based on the associated fwnode + * @fwnode: fwnode for which to find the matching drm_connector + * + * This functions looks up a drm_connector based on its associated fwnode. When + * a connector is found a reference to the connector is returned. The caller must + * call drm_connector_put() to release this reference when it is done with the + * connector. + * + * Returns: A reference to the found connector or an ERR_PTR(). + */ +struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode) +{ + struct drm_connector *connector, *found = ERR_PTR(-ENODEV); + + if (!fwnode) + return ERR_PTR(-ENODEV); + + mutex_lock(&connector_list_lock); + + list_for_each_entry(connector, &connector_list, global_connector_list_entry) { + if (connector->fwnode == fwnode || + (connector->fwnode && connector->fwnode->secondary == fwnode)) { + drm_connector_get(connector); + found = connector; + break; + } + } + + mutex_unlock(&connector_list_lock); + + return found; +} + +/** + * drm_connector_oob_hotplug_event - Report out-of-band hotplug event to connector + * @connector: connector to report the event on + * + * On some hardware a hotplug event notification may come from outside the display + * driver / device. An example of this is some USB Type-C setups where the hardware + * muxes the DisplayPort data and aux-lines but does not pass the altmode HPD + * status bit to the GPU's DP HPD pin. + * + * This function can be used to report these out-of-band events after obtaining + * a drm_connector reference through calling drm_connector_find_by_fwnode(). + */ +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode) +{ + struct drm_connector *connector; + + connector = drm_connector_find_by_fwnode(connector_fwnode); + if (IS_ERR(connector)) + return; + + if (connector->funcs->oob_hotplug_event) + connector->funcs->oob_hotplug_event(connector); + + drm_connector_put(connector); +} +EXPORT_SYMBOL(drm_connector_oob_hotplug_event); + /** * DOC: Tile group diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h index edb772947cb4..63279e984342 100644 --- a/drivers/gpu/drm/drm_crtc_internal.h +++ b/drivers/gpu/drm/drm_crtc_internal.h @@ -58,6 +58,7 @@ struct drm_property; struct edid; struct kref; struct work_struct; +struct fwnode_handle; /* drm_crtc.c */ int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, @@ -186,6 +187,7 @@ int drm_connector_set_obj_prop(struct drm_mode_object *obj, int drm_connector_create_standard_properties(struct drm_device *dev); const char *drm_get_connector_force_name(enum drm_connector_force force); void drm_connector_free_work_fn(struct work_struct *work); +struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode); /* IOCTL */ int drm_connector_property_set_ioctl(struct drm_device *dev, diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index 968a9560b4aa..76ff6ec3421b 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -10,6 +10,7 @@ * Copyright (c) 2003-2004 IBM Corp. */ +#include <linux/acpi.h> #include <linux/device.h> #include <linux/err.h> #include <linux/export.h> @@ -50,8 +51,45 @@ static struct device_type drm_sysfs_device_minor = { .name = "drm_minor" }; +static struct device_type drm_sysfs_device_connector = { + .name = "drm_connector", +}; + struct class *drm_class; +#ifdef CONFIG_ACPI +static bool drm_connector_acpi_bus_match(struct device *dev) +{ + return dev->type == &drm_sysfs_device_connector; +} + +static struct acpi_device *drm_connector_acpi_find_companion(struct device *dev) +{ + struct drm_connector *connector = to_drm_connector(dev); + + return to_acpi_device_node(connector->fwnode); +} + +static struct acpi_bus_type drm_connector_acpi_bus = { + .name = "drm_connector", + .match = drm_connector_acpi_bus_match, + .find_companion = drm_connector_acpi_find_companion, +}; + +static void drm_sysfs_acpi_register(void) +{ + register_acpi_bus_type(&drm_connector_acpi_bus); +} + +static void drm_sysfs_acpi_unregister(void) +{ + unregister_acpi_bus_type(&drm_connector_acpi_bus); +} +#else +static void drm_sysfs_acpi_register(void) { } +static void drm_sysfs_acpi_unregister(void) { } +#endif + static char *drm_devnode(struct device *dev, umode_t *mode) { return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev)); @@ -85,6 +123,8 @@ int drm_sysfs_init(void) } drm_class->devnode = drm_devnode; + + drm_sysfs_acpi_register(); return 0; } @@ -97,11 +137,17 @@ void drm_sysfs_destroy(void) { if (IS_ERR_OR_NULL(drm_class)) return; + drm_sysfs_acpi_unregister(); class_remove_file(drm_class, &class_attr_version.attr); class_destroy(drm_class); drm_class = NULL; } +static void drm_sysfs_release(struct device *dev) +{ + kfree(dev); +} + /* * Connector properties */ @@ -273,27 +319,47 @@ static const struct attribute_group *connector_dev_groups[] = { int drm_sysfs_connector_add(struct drm_connector *connector) { struct drm_device *dev = connector->dev; + struct device *kdev; + int r; if (connector->kdev) return 0; - connector->kdev = - device_create_with_groups(drm_class, dev->primary->kdev, 0, - connector, connector_dev_groups, - "card%d-%s", dev->primary->index, - connector->name); + kdev = kzalloc(sizeof(*kdev), GFP_KERNEL); + if (!kdev) + return -ENOMEM; + + device_initialize(kdev); + kdev->class = drm_class; + kdev->type = &drm_sysfs_device_connector; + kdev->parent = dev->primary->kdev; + kdev->groups = connector_dev_groups; + kdev->release = drm_sysfs_release; + dev_set_drvdata(kdev, connector); + + r = dev_set_name(kdev, "card%d-%s", dev->primary->index, connector->name); + if (r) + goto err_free; + DRM_DEBUG("adding \"%s\" to sysfs\n", connector->name); - if (IS_ERR(connector->kdev)) { - DRM_ERROR("failed to register connector device: %ld\n", PTR_ERR(connector->kdev)); - return PTR_ERR(connector->kdev); + r = device_add(kdev); + if (r) { + drm_err(dev, "failed to register connector device: %d\n", r); + goto err_free; } + connector->kdev = kdev; + if (connector->ddc) return sysfs_create_link(&connector->kdev->kobj, &connector->ddc->dev.kobj, "ddc"); return 0; + +err_free: + put_device(kdev); + return r; } void drm_sysfs_connector_remove(struct drm_connector *connector) @@ -374,11 +440,6 @@ void drm_sysfs_connector_status_event(struct drm_connector *connector, } EXPORT_SYMBOL(drm_sysfs_connector_status_event); -static void drm_sysfs_release(struct device *dev) -{ - kfree(dev); -} - struct device *drm_sysfs_minor_alloc(struct drm_minor *minor) { const char *minor_str; diff --git a/drivers/usb/typec/altmodes/Kconfig b/drivers/usb/typec/altmodes/Kconfig index 60d375e9c3c7..1a6b5e872b0d 100644 --- a/drivers/usb/typec/altmodes/Kconfig +++ b/drivers/usb/typec/altmodes/Kconfig @@ -4,6 +4,7 @@ menu "USB Type-C Alternate Mode drivers" config TYPEC_DP_ALTMODE tristate "DisplayPort Alternate Mode driver" + depends on DRM help DisplayPort USB Type-C Alternate Mode allows DisplayPort displays and adapters to be attached to the USB Type-C diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c index b7f094435b00..c1d8c23baa39 100644 --- a/drivers/usb/typec/altmodes/displayport.c +++ b/drivers/usb/typec/altmodes/displayport.c @@ -11,8 +11,10 @@ #include <linux/delay.h> #include <linux/mutex.h> #include <linux/module.h> +#include <linux/property.h> #include <linux/usb/pd_vdo.h> #include <linux/usb/typec_dp.h> +#include <drm/drm_connector.h> #include "displayport.h" #define DP_HEADER(_dp, ver, cmd) (VDO((_dp)->alt->svid, 1, ver, cmd) \ @@ -57,19 +59,28 @@ struct dp_altmode { struct typec_displayport_data data; enum dp_state state; + bool hpd; struct mutex lock; /* device lock */ struct work_struct work; struct typec_altmode *alt; const struct typec_altmode *port; + struct fwnode_handle *connector_fwnode; }; static int dp_altmode_notify(struct dp_altmode *dp) { - u8 state = get_count_order(DP_CONF_GET_PIN_ASSIGN(dp->data.conf)); + unsigned long conf; + u8 state; + + if (dp->data.conf) { + state = get_count_order(DP_CONF_GET_PIN_ASSIGN(dp->data.conf)); + conf = TYPEC_MODAL_STATE(state); + } else { + conf = TYPEC_STATE_USB; + } - return typec_altmode_notify(dp->alt, TYPEC_MODAL_STATE(state), - &dp->data); + return typec_altmode_notify(dp->alt, conf, &dp->data); } static int dp_altmode_configure(struct dp_altmode *dp, u8 con) @@ -118,6 +129,7 @@ static int dp_altmode_configure(struct dp_altmode *dp, u8 con) static int dp_altmode_status_update(struct dp_altmode *dp) { bool configured = !!DP_CONF_GET_PIN_ASSIGN(dp->data.conf); + bool hpd = !!(dp->data.status & DP_STATUS_HPD_STATE); u8 con = DP_STATUS_CONNECTION(dp->data.status); int ret = 0; @@ -130,6 +142,11 @@ static int dp_altmode_status_update(struct dp_altmode *dp) ret = dp_altmode_configure(dp, con); if (!ret) dp->state = DP_STATE_CONFIGURE; + } else { + if (dp->hpd != hpd) { + drm_connector_oob_hotplug_event(dp->connector_fwnode); + dp->hpd = hpd; + } } return ret; @@ -137,21 +154,10 @@ static int dp_altmode_status_update(struct dp_altmode *dp) static int dp_altmode_configured(struct dp_altmode *dp) { - int ret; - sysfs_notify(&dp->alt->dev.kobj, "displayport", "configuration"); - - if (!dp->data.conf) - return typec_altmode_notify(dp->alt, TYPEC_STATE_USB, - &dp->data); - - ret = dp_altmode_notify(dp); - if (ret) - return ret; - sysfs_notify(&dp->alt->dev.kobj, "displayport", "pin_assignment"); - return 0; + return dp_altmode_notify(dp); } static int dp_altmode_configure_vdm(struct dp_altmode *dp, u32 conf) @@ -172,13 +178,8 @@ static int dp_altmode_configure_vdm(struct dp_altmode *dp, u32 conf) } ret = typec_altmode_vdm(dp->alt, header, &conf, 2); - if (ret) { - if (DP_CONF_GET_PIN_ASSIGN(dp->data.conf)) - dp_altmode_notify(dp); - else - typec_altmode_notify(dp->alt, TYPEC_STATE_USB, - &dp->data); - } + if (ret) + dp_altmode_notify(dp); return ret; } @@ -521,6 +522,7 @@ static const struct attribute_group dp_altmode_group = { int dp_altmode_probe(struct typec_altmode *alt) { const struct typec_altmode *port = typec_altmode_get_partner(alt); + struct fwnode_handle *fwnode; struct dp_altmode *dp; int ret; @@ -549,6 +551,11 @@ int dp_altmode_probe(struct typec_altmode *alt) alt->desc = "DisplayPort"; alt->ops = &dp_altmode_ops; + fwnode = dev_fwnode(alt->dev.parent->parent); /* typec_port fwnode */ + dp->connector_fwnode = fwnode_find_reference(fwnode, "displayport", 0); + if (IS_ERR(dp->connector_fwnode)) + dp->connector_fwnode = NULL; + typec_altmode_set_drvdata(alt, dp); dp->state = DP_STATE_ENTER; @@ -564,6 +571,13 @@ void dp_altmode_remove(struct typec_altmode *alt) sysfs_remove_group(&alt->dev.kobj, &dp_altmode_group); cancel_work_sync(&dp->work); + + if (dp->connector_fwnode) { + if (dp->hpd) + drm_connector_oob_hotplug_event(dp->connector_fwnode); + + fwnode_handle_put(dp->connector_fwnode); + } } EXPORT_SYMBOL_GPL(dp_altmode_remove); diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 1647960c9e50..79fa34e5ccdb 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1084,6 +1084,14 @@ struct drm_connector_funcs { */ void (*atomic_print_state)(struct drm_printer *p, const struct drm_connector_state *state); + + /** + * @oob_hotplug_event: + * + * This will get called when a hotplug-event for a drm-connector + * has been received from a source outside the display driver / device. + */ + void (*oob_hotplug_event)(struct drm_connector *connector); }; /** @@ -1228,6 +1236,14 @@ struct drm_connector { struct device *kdev; /** @attr: sysfs attributes */ struct device_attribute *attr; + /** + * @fwnode: associated fwnode supplied by platform firmware + * + * Drivers can set this to associate a fwnode with a connector, drivers + * are expected to get a reference on the fwnode when setting this. + * drm_connector_cleanup() will call fwnode_handle_put() on this. + */ + struct fwnode_handle *fwnode; /** * @head: @@ -1239,6 +1255,14 @@ struct drm_connector { */ struct list_head head; + /** + * @global_connector_list_entry: + * + * Connector entry in the global connector-list, used by + * drm_connector_find_by_fwnode(). + */ + struct list_head global_connector_list_entry; + /** @base: base KMS object */ struct drm_mode_object base; @@ -1650,6 +1674,7 @@ drm_connector_is_unregistered(struct drm_connector *connector) DRM_CONNECTOR_UNREGISTERED; } +void drm_connector_oob_hotplug_event(struct fwnode_handle *connector_fwnode); const char *drm_get_connector_type_name(unsigned int connector_type); const char *drm_get_connector_status_name(enum drm_connector_status status); const char *drm_get_subpixel_order_name(enum subpixel_order order); |