Add functions to deal with the registred connectors as an array: - drm_connector_get_all() - drm_connector_put_all()
And to get the enabled status of those connectors: drm_connector_get_enabled_status()
This is prep work to remove struct drm_fb_helper_connector.
Signed-off-by: Noralf Trønnes noralf@tronnes.org --- drivers/gpu/drm/drm_connector.c | 105 ++++++++++++++++++++++++++++++++++++++++ include/drm/drm_connector.h | 5 ++ 2 files changed, 110 insertions(+)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index b9eb143d70fc..25c333c05a4e 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -1854,3 +1854,108 @@ drm_connector_pick_cmdline_mode(struct drm_connector *connector) return mode; } EXPORT_SYMBOL(drm_connector_pick_cmdline_mode); + +/** + * drm_connector_get_all - Get all connectors into an array + * @dev: DRM device + * @connectors: Returned connector array + * + * This function iterates through all registered connectors and adds them to an + * array allocated by this function. A ref is taken on the connectors. + * + * Use drm_connector_put_all() to drop refs and free the array. + * + * Returns: + * Number of connectors or -ENOMEM on failure. + */ +int drm_connector_get_all(struct drm_device *dev, struct drm_connector ***connectors) +{ + struct drm_connector *connector, **temp, **conns = NULL; + struct drm_connector_list_iter conn_iter; + int connector_count = 0; + + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + temp = krealloc(conns, (connector_count + 1) * sizeof(*conns), GFP_KERNEL); + if (!temp) + goto err_put_free; + + conns = temp; + conns[connector_count++] = connector; + drm_connector_get(connector); + } + drm_connector_list_iter_end(&conn_iter); + + *connectors = conns; + + return connector_count; + +err_put_free: + drm_connector_list_iter_end(&conn_iter); + drm_connector_put_all(conns, connector_count); + + return -ENOMEM; +} +EXPORT_SYMBOL(drm_connector_get_all); + +/** + * drm_connector_put_all - Put and free connector array + * @connectors: Array of connectors + * @connector_count: Number of connectors in the array (can be negative or zero) + * + * This function drops the ref on the connectors an frees the array. + */ +void drm_connector_put_all(struct drm_connector **connectors, int connector_count) +{ + int i; + + if (connector_count < 1) + return; + + for (i = 0; i < connector_count; i++) + drm_connector_put(connectors[i]); + kfree(connectors); +} +EXPORT_SYMBOL(drm_connector_put_all); + +/** + * drm_connector_get_enabled_status - Get enabled status on connectors + * @connectors: Array of connectors + * @connector_count: Number of connectors in the array + * + * This loops over the connector array and sets enabled if connector status is + * _connected_. If no connectors are connected, a new pass is done and + * connectors that are not _disconnected_ are set enabled. + * + * The caller is responsible for freeing the array using kfree(). + * + * Returns: + * A boolean array of connector enabled statuses or NULL on allocation failure. + */ +bool *drm_connector_get_enabled_status(struct drm_connector **connectors, + unsigned int connector_count) +{ + bool *enabled, any_enabled = false; + unsigned int i; + + enabled = kcalloc(connector_count, sizeof(*enabled), GFP_KERNEL); + if (!enabled) + return NULL; + + for (i = 0; i < connector_count; i++) { + if (connectors[i]->status == connector_status_connected) { + enabled[i] = true; + any_enabled = true; + } + } + + if (any_enabled) + return enabled; + + for (i = 0; i < connector_count; i++) + if (connectors[i]->status != connector_status_disconnected) + enabled[i] = true; + + return enabled; +} +EXPORT_SYMBOL(drm_connector_get_enabled_status); diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 9cb4ca42373c..c3556a5f40c9 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1169,4 +1169,9 @@ drm_connector_has_preferred_mode(struct drm_connector *connector, struct drm_display_mode * drm_connector_pick_cmdline_mode(struct drm_connector *connector);
+int drm_connector_get_all(struct drm_device *dev, struct drm_connector ***connectors); +void drm_connector_put_all(struct drm_connector **connectors, int connector_count); +bool *drm_connector_get_enabled_status(struct drm_connector **connectors, + unsigned int connector_count); + #endif