diff options
Diffstat (limited to 'drivers/gpu/drm/drm_connector.c')
| -rw-r--r-- | drivers/gpu/drm/drm_connector.c | 181 |
1 files changed, 154 insertions, 27 deletions
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index fc35f47e2849..48b08c9611a7 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -33,6 +33,7 @@ #include <drm/drm_sysfs.h> #include <drm/drm_utils.h> +#include <linux/platform_device.h> #include <linux/property.h> #include <linux/uaccess.h> @@ -218,11 +219,11 @@ void drm_connector_free_work_fn(struct work_struct *work) } } -static int __drm_connector_init(struct drm_device *dev, - struct drm_connector *connector, - const struct drm_connector_funcs *funcs, - int connector_type, - struct i2c_adapter *ddc) +static int drm_connector_init_only(struct drm_device *dev, + struct drm_connector *connector, + const struct drm_connector_funcs *funcs, + int connector_type, + struct i2c_adapter *ddc) { struct drm_mode_config *config = &dev->mode_config; int ret; @@ -273,12 +274,15 @@ static int __drm_connector_init(struct drm_device *dev, /* provide ddc symlink in sysfs */ connector->ddc = ddc; + INIT_LIST_HEAD(&connector->head); INIT_LIST_HEAD(&connector->global_connector_list_entry); INIT_LIST_HEAD(&connector->probed_modes); INIT_LIST_HEAD(&connector->modes); mutex_init(&connector->mutex); + mutex_init(&connector->eld_mutex); mutex_init(&connector->edid_override_mutex); mutex_init(&connector->hdmi.infoframes.lock); + mutex_init(&connector->hdmi_audio.lock); connector->edid_blob_ptr = NULL; connector->epoch_counter = 0; connector->tile_blob_ptr = NULL; @@ -288,14 +292,6 @@ static int __drm_connector_init(struct drm_device *dev, 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); @@ -332,6 +328,54 @@ out_put: return ret; } +static void drm_connector_add(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_mode_config *config = &dev->mode_config; + + if (drm_WARN_ON(dev, !list_empty(&connector->head))) + return; + + 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); +} + +static void drm_connector_remove(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + + /* + * For dynamic connectors drm_connector_cleanup() can call this function + * before the connector is registered and added to the list. + */ + if (list_empty(&connector->head)) + return; + + spin_lock_irq(&dev->mode_config.connector_list_lock); + list_del_init(&connector->head); + dev->mode_config.num_connector--; + spin_unlock_irq(&dev->mode_config.connector_list_lock); +} + +static int drm_connector_init_and_add(struct drm_device *dev, + struct drm_connector *connector, + const struct drm_connector_funcs *funcs, + int connector_type, + struct i2c_adapter *ddc) +{ + int ret; + + ret = drm_connector_init_only(dev, connector, funcs, connector_type, ddc); + if (ret) + return ret; + + drm_connector_add(connector); + + return 0; +} + /** * drm_connector_init - Init a preallocated connector * @dev: DRM device @@ -361,11 +405,52 @@ int drm_connector_init(struct drm_device *dev, if (drm_WARN_ON(dev, !(funcs && funcs->destroy))) return -EINVAL; - return __drm_connector_init(dev, connector, funcs, connector_type, NULL); + return drm_connector_init_and_add(dev, connector, funcs, connector_type, NULL); } EXPORT_SYMBOL(drm_connector_init); /** + * drm_connector_dynamic_init - Init a preallocated dynamic connector + * @dev: DRM device + * @connector: the connector to init + * @funcs: callbacks for this connector + * @connector_type: user visible type of the connector + * @ddc: pointer to the associated ddc adapter + * + * Initialises a preallocated dynamic connector. Connectors should be + * subclassed as part of driver connector objects. The connector + * structure should not be allocated with devm_kzalloc(). + * + * Drivers should call this for dynamic connectors which can be hotplugged + * after drm_dev_register() has been called already, e.g. DP MST connectors. + * For all other - static - connectors, drivers should call one of the + * drm_connector_init*()/drmm_connector_init*() functions. + * + * After calling this function the drivers must call + * drm_connector_dynamic_register(). + * + * To remove the connector the driver must call drm_connector_unregister() + * followed by drm_connector_put(). Putting the last reference will call the + * driver's &drm_connector_funcs.destroy hook, which in turn must call + * drm_connector_cleanup() and free the connector structure. + * + * Returns: + * Zero on success, error code on failure. + */ +int drm_connector_dynamic_init(struct drm_device *dev, + struct drm_connector *connector, + const struct drm_connector_funcs *funcs, + int connector_type, + struct i2c_adapter *ddc) +{ + if (drm_WARN_ON(dev, !(funcs && funcs->destroy))) + return -EINVAL; + + return drm_connector_init_only(dev, connector, funcs, connector_type, ddc); +} +EXPORT_SYMBOL(drm_connector_dynamic_init); + +/** * drm_connector_init_with_ddc - Init a preallocated connector * @dev: DRM device * @connector: the connector to init @@ -398,7 +483,7 @@ int drm_connector_init_with_ddc(struct drm_device *dev, if (drm_WARN_ON(dev, !(funcs && funcs->destroy))) return -EINVAL; - return __drm_connector_init(dev, connector, funcs, connector_type, ddc); + return drm_connector_init_and_add(dev, connector, funcs, connector_type, ddc); } EXPORT_SYMBOL(drm_connector_init_with_ddc); @@ -442,7 +527,7 @@ int drmm_connector_init(struct drm_device *dev, if (drm_WARN_ON(dev, funcs && funcs->destroy)) return -EINVAL; - ret = __drm_connector_init(dev, connector, funcs, connector_type, ddc); + ret = drm_connector_init_and_add(dev, connector, funcs, connector_type, ddc); if (ret) return ret; @@ -507,6 +592,9 @@ int drmm_connector_hdmi_init(struct drm_device *dev, if (!supported_formats || !(supported_formats & BIT(HDMI_COLORSPACE_RGB))) return -EINVAL; + if (connector->ycbcr_420_allowed != !!(supported_formats & BIT(HDMI_COLORSPACE_YUV420))) + return -EINVAL; + if (!(max_bpc == 8 || max_bpc == 10 || max_bpc == 12)) return -EINVAL; @@ -631,6 +719,8 @@ void drm_connector_cleanup(struct drm_connector *connector) DRM_CONNECTOR_REGISTERED)) drm_connector_unregister(connector); + platform_device_unregister(connector->hdmi_audio.codec_pdev); + if (connector->privacy_screen) { drm_privacy_screen_put(connector->privacy_screen); connector->privacy_screen = NULL; @@ -659,16 +749,15 @@ void drm_connector_cleanup(struct drm_connector *connector) connector->name = NULL; fwnode_handle_put(connector->fwnode); connector->fwnode = NULL; - spin_lock_irq(&dev->mode_config.connector_list_lock); - list_del(&connector->head); - dev->mode_config.num_connector--; - spin_unlock_irq(&dev->mode_config.connector_list_lock); + + drm_connector_remove(connector); 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->hdmi_audio.lock); mutex_destroy(&connector->hdmi.infoframes.lock); mutex_destroy(&connector->mutex); @@ -683,14 +772,17 @@ EXPORT_SYMBOL(drm_connector_cleanup); * drm_connector_register - register a connector * @connector: the connector to register * - * Register userspace interfaces for a connector. Only call this for connectors - * which can be hotplugged after drm_dev_register() has been called already, - * e.g. DP MST connectors. All other connectors will be registered automatically - * when calling drm_dev_register(). + * Register userspace interfaces for a connector. Drivers shouldn't call this + * function. Static connectors will be registered automatically by DRM core + * from drm_dev_register(), dynamic connectors (MST) should be registered by + * drivers calling drm_connector_dynamic_register(). * * When the connector is no longer available, callers must call * drm_connector_unregister(). * + * Note: Existing uses of this function in drivers should be a nop already and + * are scheduled to be removed. + * * Returns: * Zero on success, error code on failure. */ @@ -750,12 +842,43 @@ unlock: EXPORT_SYMBOL(drm_connector_register); /** + * drm_connector_dynamic_register - register a dynamic connector + * @connector: the connector to register + * + * Register userspace interfaces for a connector. Only call this for connectors + * initialized by calling drm_connector_dynamic_init(). All other connectors + * will be registered automatically when calling drm_dev_register(). + * + * When the connector is no longer available the driver must call + * drm_connector_unregister(). + * + * Returns: + * Zero on success, error code on failure. + */ +int drm_connector_dynamic_register(struct drm_connector *connector) +{ + /* Was the connector inited already? */ + if (WARN_ON(!(connector->funcs && connector->funcs->destroy))) + return -EINVAL; + + drm_connector_add(connector); + + return drm_connector_register(connector); +} +EXPORT_SYMBOL(drm_connector_dynamic_register); + +/** * drm_connector_unregister - unregister a connector * @connector: the connector to unregister * - * Unregister userspace interfaces for a connector. Only call this for - * connectors which have been registered explicitly by calling - * drm_connector_register(). + * Unregister userspace interfaces for a connector. Drivers should call this + * for dynamic connectors (MST) only, which were registered explicitly by + * calling drm_connector_dynamic_register(). All other - static - connectors + * will be unregistered automatically by DRM core and drivers shouldn't call + * this function for those. + * + * Note: Existing uses of this function in drivers for static connectors + * should be a nop already and are scheduled to be removed. */ void drm_connector_unregister(struct drm_connector *connector) { @@ -1304,6 +1427,10 @@ EXPORT_SYMBOL(drm_hdmi_connector_get_output_format_name); * callback. For atomic drivers the remapping to the "ACTIVE" property is * implemented in the DRM core. * + * On atomic drivers any DPMS setproperty ioctl where the value does not + * change is completely skipped, otherwise a full atomic commit will occur. + * On legacy drivers the exact behavior is driver specific. + * * Note that this property cannot be set through the MODE_ATOMIC ioctl, * userspace must use "ACTIVE" on the CRTC instead. * |