[media] uapi/media.h: Add MEDIA_IOC_G_TOPOLOGY ioctl
Add a new ioctl that will report the entire topology on
one go.
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/include/media/media-entity.h b/include/media/media-entity.h
index 5171e3c..dbc4da4 100644
--- a/include/media/media-entity.h
+++ b/include/media/media-entity.h
@@ -181,6 +181,8 @@
*/
struct media_intf_devnode {
struct media_interface intf;
+
+ /* Should match the fields at media_v2_intf_devnode */
u32 major;
u32 minor;
};
diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h
index 3c408010..72ac39d 100644
--- a/include/uapi/linux/media.h
+++ b/include/uapi/linux/media.h
@@ -206,6 +206,10 @@
#define MEDIA_LNK_FL_IMMUTABLE (1 << 1)
#define MEDIA_LNK_FL_DYNAMIC (1 << 2)
+#define MEDIA_LNK_FL_LINK_TYPE (0xf << 28)
+# define MEDIA_LNK_FL_DATA_LINK (0 << 28)
+# define MEDIA_LNK_FL_INTERFACE_LINK (1 << 28)
+
struct media_link_desc {
struct media_pad_desc source;
struct media_pad_desc sink;
@@ -241,11 +245,93 @@
#define MEDIA_INTF_T_V4L_SUBDEV (MEDIA_INTF_T_V4L_BASE + 3)
#define MEDIA_INTF_T_V4L_SWRADIO (MEDIA_INTF_T_V4L_BASE + 4)
-/* TBD: declare the structs needed for the new G_TOPOLOGY ioctl */
+/*
+ * MC next gen API definitions
+ *
+ * NOTE: The declarations below are close to the MC RFC for the Media
+ * Controller, the next generation. Yet, there are a few adjustments
+ * to do, as we want to be able to have a functional API before
+ * the MC properties change. Those will be properly marked below.
+ * Please also notice that I removed "num_pads", "num_links",
+ * from the proposal, as a proper userspace application will likely
+ * use lists for pads/links, just as we intend to do in Kernelspace.
+ * The API definition should be freed from fields that are bound to
+ * some specific data structure.
+ *
+ * FIXME: Currently, I opted to name the new types as "media_v2", as this
+ * won't cause any conflict with the Kernelspace namespace, nor with
+ * the previous kAPI media_*_desc namespace. This can be changed
+ * later, before the adding this API upstream.
+ */
+
+
+struct media_v2_entity {
+ __u32 id;
+ char name[64]; /* FIXME: move to a property? (RFC says so) */
+ __u16 reserved[14];
+};
+
+/* Should match the specific fields at media_intf_devnode */
+struct media_v2_intf_devnode {
+ __u32 major;
+ __u32 minor;
+};
+
+struct media_v2_interface {
+ __u32 id;
+ __u32 intf_type;
+ __u32 flags;
+ __u32 reserved[9];
+
+ union {
+ struct media_v2_intf_devnode devnode;
+ __u32 raw[16];
+ };
+};
+
+struct media_v2_pad {
+ __u32 id;
+ __u32 entity_id;
+ __u32 flags;
+ __u16 reserved[9];
+};
+
+struct media_v2_link {
+ __u32 id;
+ __u32 source_id;
+ __u32 sink_id;
+ __u32 flags;
+ __u32 reserved[5];
+};
+
+struct media_v2_topology {
+ __u32 topology_version;
+
+ __u32 num_entities;
+ struct media_v2_entity *entities;
+
+ __u32 num_interfaces;
+ struct media_v2_interface *interfaces;
+
+ __u32 num_pads;
+ struct media_v2_pad *pads;
+
+ __u32 num_links;
+ struct media_v2_link *links;
+
+ struct {
+ __u32 reserved_num;
+ void *reserved_ptr;
+ } reserved_types[16];
+ __u32 reserved[8];
+};
+
+/* ioctls */
#define MEDIA_IOC_DEVICE_INFO _IOWR('|', 0x00, struct media_device_info)
#define MEDIA_IOC_ENUM_ENTITIES _IOWR('|', 0x01, struct media_entity_desc)
#define MEDIA_IOC_ENUM_LINKS _IOWR('|', 0x02, struct media_links_enum)
#define MEDIA_IOC_SETUP_LINK _IOWR('|', 0x03, struct media_link_desc)
+#define MEDIA_IOC_G_TOPOLOGY _IOWR('|', 0x04, struct media_v2_topology)
#endif /* __LINUX_MEDIA_H */