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native: fail on systems with connectors spread across multiple gpus

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We don't support using more than one GPU for output yet, so we should fail
if we encounter that situation, so GDM will fall back to X.

https://bugzilla.gnome.org/show_bug.cgi?id=771442
This commit is contained in:
Ray Strode 2016-10-18 16:43:04 -04:00
parent f1e1a5ff06
commit e2bfaf0751
1 changed files with 62 additions and 1 deletions
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63
src/backends/native/meta-launcher.c
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@ -284,6 +284,53 @@ on_active_changed (Login1Session *session,
sync_active (self);
}
static guint
count_devices_with_connectors (const gchar *seat_name,
GList *devices)
{
g_autoptr (GHashTable) cards = NULL;
GList *tmp;
cards = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, g_object_unref);
for (tmp = devices; tmp != NULL; tmp = tmp->next)
{
GUdevDevice *device = tmp->data;
g_autoptr (GUdevDevice) parent_device = NULL;
const gchar *parent_device_type = NULL;
const gchar *card_seat;
/* filter out the real card devices, we only care about the connectors */
if (g_udev_device_get_device_type (device) != G_UDEV_DEVICE_TYPE_NONE)
continue;
/* only connectors have a modes attribute */
if (!g_udev_device_has_sysfs_attr (device, "modes"))
continue;
parent_device = g_udev_device_get_parent (device);
if (g_udev_device_get_device_type (parent_device) == G_UDEV_DEVICE_TYPE_CHAR)
parent_device_type = g_udev_device_get_property (parent_device, "DEVTYPE");
if (g_strcmp0 (parent_device_type, DRM_CARD_UDEV_DEVICE_TYPE) != 0)
continue;
card_seat = g_udev_device_get_property (parent_device, "ID_SEAT");
if (!card_seat)
card_seat = "seat0";
if (g_strcmp0 (seat_name, card_seat) != 0)
continue;
g_hash_table_insert (cards,
(gpointer) g_udev_device_get_name (parent_device),
g_steal_pointer (&parent_device));
}
return g_hash_table_size (cards);
}
static gchar *
get_primary_gpu_path (const gchar *seat_name)
{
@ -306,6 +353,20 @@ get_primary_gpu_path (const gchar *seat_name)
if (!devices)
goto out;
/* For now, fail on systems where some of the connectors
* are connected to secondary gpus.
*
* https://bugzilla.gnome.org/show_bug.cgi?id=771442
*/
if (g_getenv ("MUTTER_ALLOW_HYBRID_GPUS") == NULL)
{
guint num_devices;
num_devices = count_devices_with_connectors (seat_name, devices);
if (num_devices != 1)
goto out;
}
for (tmp = devices; tmp != NULL; tmp = tmp->next)
{
g_autoptr (GUdevDevice) platform_device = NULL;
@ -362,9 +423,9 @@ get_primary_gpu_path (const gchar *seat_name)
}
}
out:
g_list_free_full (devices, g_object_unref);
out:
return path;
}