diff options
author | Richard Hughes <richard@hughsie.com> | 2011-01-04 18:05:09 +0000 |
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committer | Richard Hughes <richard@hughsie.com> | 2011-01-04 18:05:09 +0000 |
commit | 17b7aef701c1dfac0376149aba64fbcdde278a32 (patch) | |
tree | ede0820c06e657b0ec57253b70f5e2019a2f99a0 /src/linux/up-dock.c | |
parent | c507b516d47b5eb8b3084efb93b71aaaa92a78c1 (diff) |
linux: use the number of active DRM devices to determine the system docked status
Not ideal, but better than relying on ACPI.
Diffstat (limited to 'src/linux/up-dock.c')
-rw-r--r-- | src/linux/up-dock.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/src/linux/up-dock.c b/src/linux/up-dock.c new file mode 100644 index 0000000..59475f7 --- /dev/null +++ b/src/linux/up-dock.c @@ -0,0 +1,186 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- + * + * Copyright (C) 2010 Richard Hughes <richard@hughsie.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <glib-object.h> +#include <gudev/gudev.h> + +#include "up-daemon.h" +#include "up-dock.h" + +struct UpDockPrivate +{ + UpDaemon *daemon; + GUdevClient *gudev_client; + guint poll_id; +}; + +G_DEFINE_TYPE (UpDock, up_dock, G_TYPE_OBJECT) +#define UP_DOCK_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), UP_TYPE_DOCK, UpDockPrivate)) + +/* the kernel is pretty crap at sending a uevent when the status changes */ +#define UP_DOCK_POLL_TIMEOUT 30 + +/** + * up_dock_device_check: + **/ +static gboolean +up_dock_device_check (GUdevDevice *d) +{ + const gchar *status; + gboolean ret = FALSE; + + /* Get the boolean state from the kernel -- note that ideally + * the property value would be "1" or "true" but now it's + * set in stone as ABI. Urgh. */ + status = g_udev_device_get_sysfs_attr (d, "status"); + if (status == NULL) + goto out; + ret = (g_strcmp0 (status, "connected") == 0); + g_debug ("graphics device %s is %s", + g_udev_device_get_sysfs_path (d), + ret ? "on" : "off"); +out: + return ret; +} + +/** + * up_dock_refresh: + **/ +static gboolean +up_dock_refresh (UpDock *dock) +{ + GList *devices; + GList *l; + GUdevDevice *native; + guint count = 0; + + /* the metric we're using here is that a machine is docked when + * there is more than one active output */ + devices = g_udev_client_query_by_subsystem (dock->priv->gudev_client, + "drm"); + for (l = devices; l != NULL; l = l->next) { + native = l->data; + count += up_dock_device_check (native); + } + g_list_foreach (devices, (GFunc) g_object_unref, NULL); + g_list_free (devices); + + /* update the daemon state, which causes DBus traffic */ + up_daemon_set_is_docked (dock->priv->daemon, (count > 1)); + + return TRUE; +} + +/** + * up_dock_poll_cb: + **/ +static gboolean +up_dock_poll_cb (UpDock *dock) +{ + g_debug ("Doing the dock refresh"); + up_dock_refresh (dock); + return TRUE; +} + +/** + * up_dock_coldplug: + **/ +gboolean +up_dock_coldplug (UpDock *dock, UpDaemon *daemon) +{ + /* save daemon */ + dock->priv->daemon = g_object_ref (daemon); + dock->priv->poll_id = g_timeout_add_seconds (UP_DOCK_POLL_TIMEOUT, + (GSourceFunc) up_dock_poll_cb, + dock); + return up_dock_refresh (dock); +} + + +/** + * up_dock_uevent_signal_handler_cb: + **/ +static void +up_dock_uevent_signal_handler_cb (GUdevClient *client, const gchar *action, + GUdevDevice *device, gpointer user_data) +{ + UpDock *dock = UP_DOCK (user_data); + up_dock_refresh (dock); +} + +/** + * up_dock_init: + **/ +static void +up_dock_init (UpDock *dock) +{ + const gchar *subsystems[] = { "drm", NULL}; + dock->priv = UP_DOCK_GET_PRIVATE (dock); + dock->priv->gudev_client = g_udev_client_new (subsystems); + g_signal_connect (dock->priv->gudev_client, "uevent", + G_CALLBACK (up_dock_uevent_signal_handler_cb), dock); +} + +/** + * up_dock_finalize: + **/ +static void +up_dock_finalize (GObject *object) +{ + UpDock *dock; + + g_return_if_fail (object != NULL); + g_return_if_fail (UP_IS_DOCK (object)); + + dock = UP_DOCK (object); + g_return_if_fail (dock->priv != NULL); + + g_object_unref (dock->priv->gudev_client); + if (dock->priv->daemon != NULL) + g_object_unref (dock->priv->daemon); + if (dock->priv->poll_id != 0) + g_source_remove (dock->priv->poll_id); + G_OBJECT_CLASS (up_dock_parent_class)->finalize (object); +} + +/** + * up_dock_class_init: + **/ +static void +up_dock_class_init (UpDockClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + object_class->finalize = up_dock_finalize; + g_type_class_add_private (klass, sizeof (UpDockPrivate)); +} + +/** + * up_dock_new: + **/ +UpDock * +up_dock_new (void) +{ + return g_object_new (UP_TYPE_DOCK, NULL); +} + |