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-rw-r--r--include/uapi/linux/media.h122
1 files changed, 64 insertions, 58 deletions
diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h
index 290dd5585dc8..ff6a8010c520 100644
--- a/include/uapi/linux/media.h
+++ b/include/uapi/linux/media.h
@@ -46,87 +46,93 @@ struct media_device_info {
* Initial value to be used when a new entity is created
* Drivers should change it to something useful
*/
-#define MEDIA_ENT_T_UNKNOWN 0x00000000
+#define MEDIA_ENT_F_UNKNOWN 0x00000000
/*
- * Base numbers for entity types
+ * Base number ranges for entity functions
*
- * Please notice that the huge gap of 16 bits for each base is overkill!
- * 8 bits is more than enough to avoid starving entity types for each
- * subsystem.
- *
- * However, It is kept this way just to avoid binary breakages with the
- * namespace provided on legacy versions of this header.
+ * NOTE: those ranges and entity function number are phased just to
+ * make it easier to maintain this file. Userspace should not rely on
+ * the ranges to identify a group of function types, as newer
+ * functions can be added with any name within the full u32 range.
*/
-#define MEDIA_ENT_T_DVB_BASE 0x00000000
-#define MEDIA_ENT_T_V4L2_BASE 0x00010000
-#define MEDIA_ENT_T_V4L2_SUBDEV_BASE 0x00020000
-#define MEDIA_ENT_T_CONNECTOR_BASE 0x00030000
+#define MEDIA_ENT_F_BASE 0x00000000
+#define MEDIA_ENT_F_OLD_BASE 0x00010000
+#define MEDIA_ENT_F_OLD_SUBDEV_BASE 0x00020000
/*
- * V4L2 entities - Those are used for DMA (mmap/DMABUF) and
- * read()/write() data I/O associated with the V4L2 devnodes.
+ * DVB entities
*/
-#define MEDIA_ENT_T_V4L2_VIDEO (MEDIA_ENT_T_V4L2_BASE + 1)
- /*
- * Please notice that numbers between MEDIA_ENT_T_V4L2_BASE + 2 and
- * MEDIA_ENT_T_V4L2_BASE + 4 can't be used, as those values used
- * to be declared for FB, ALSA and DVB entities.
- * As those values were never actually used in practice, we're just
- * adding them as backward compatibility macros and keeping the
- * numberspace clean here. This way, we avoid breaking compilation,
- * in the case of having some userspace application using the old
- * symbols.
- */
-#define MEDIA_ENT_T_V4L2_VBI (MEDIA_ENT_T_V4L2_BASE + 5)
-#define MEDIA_ENT_T_V4L2_SWRADIO (MEDIA_ENT_T_V4L2_BASE + 6)
-
-/* V4L2 Sub-device entities */
+#define MEDIA_ENT_F_DTV_DEMOD (MEDIA_ENT_F_BASE + 1)
+#define MEDIA_ENT_F_TS_DEMUX (MEDIA_ENT_F_BASE + 2)
+#define MEDIA_ENT_F_DTV_CA (MEDIA_ENT_F_BASE + 3)
+#define MEDIA_ENT_F_DTV_NET_DECAP (MEDIA_ENT_F_BASE + 4)
/*
+ * Connectors
+ */
+#define MEDIA_ENT_F_CONN_RF (MEDIA_ENT_F_BASE + 21)
+#define MEDIA_ENT_F_CONN_SVIDEO (MEDIA_ENT_F_BASE + 22)
+#define MEDIA_ENT_F_CONN_COMPOSITE (MEDIA_ENT_F_BASE + 23)
+ /* For internal test signal generators and other debug connectors */
+#define MEDIA_ENT_F_CONN_TEST (MEDIA_ENT_F_BASE + 24)
+
+/*
+ * I/O entities
+ */
+#define MEDIA_ENT_F_IO_DTV (MEDIA_ENT_F_BASE + 31)
+#define MEDIA_ENT_F_IO_VBI (MEDIA_ENT_F_BASE + 32)
+#define MEDIA_ENT_F_IO_SWRADIO (MEDIA_ENT_F_BASE + 33)
+
+/*
+ * Don't touch on those. The ranges MEDIA_ENT_F_OLD_BASE and
+ * MEDIA_ENT_F_OLD_SUBDEV_BASE are kept to keep backward compatibility
+ * with the legacy v1 API.The number range is out of range by purpose:
+ * several previously reserved numbers got excluded from this range.
+ *
* Subdevs are initialized with MEDIA_ENT_T_V4L2_SUBDEV_UNKNOWN,
* in order to preserve backward compatibility.
* Drivers should change to the proper subdev type before
* registering the entity.
*/
-#define MEDIA_ENT_T_V4L2_SUBDEV_UNKNOWN MEDIA_ENT_T_V4L2_SUBDEV_BASE
-
-#define MEDIA_ENT_T_V4L2_SUBDEV_SENSOR (MEDIA_ENT_T_V4L2_SUBDEV_BASE + 1)
-#define MEDIA_ENT_T_V4L2_SUBDEV_FLASH (MEDIA_ENT_T_V4L2_SUBDEV_BASE + 2)
-#define MEDIA_ENT_T_V4L2_SUBDEV_LENS (MEDIA_ENT_T_V4L2_SUBDEV_BASE + 3)
- /* A converter of analogue video to its digital representation. */
-#define MEDIA_ENT_T_V4L2_SUBDEV_DECODER (MEDIA_ENT_T_V4L2_SUBDEV_BASE + 4)
- /* Tuner entity is actually both V4L2 and DVB subdev */
-#define MEDIA_ENT_T_V4L2_SUBDEV_TUNER (MEDIA_ENT_T_V4L2_SUBDEV_BASE + 5)
-
-/* DVB entities */
-#define MEDIA_ENT_T_DVB_DEMOD (MEDIA_ENT_T_DVB_BASE + 1)
-#define MEDIA_ENT_T_DVB_DEMUX (MEDIA_ENT_T_DVB_BASE + 2)
-#define MEDIA_ENT_T_DVB_TSOUT (MEDIA_ENT_T_DVB_BASE + 3)
-#define MEDIA_ENT_T_DVB_CA (MEDIA_ENT_T_DVB_BASE + 4)
-#define MEDIA_ENT_T_DVB_NET_DECAP (MEDIA_ENT_T_DVB_BASE + 5)
-
-/* Connectors */
-#define MEDIA_ENT_T_CONN_RF (MEDIA_ENT_T_CONNECTOR_BASE + 1)
-#define MEDIA_ENT_T_CONN_SVIDEO (MEDIA_ENT_T_CONNECTOR_BASE + 2)
-#define MEDIA_ENT_T_CONN_COMPOSITE (MEDIA_ENT_T_CONNECTOR_BASE + 3)
-/* For internal test signal generators and other debug connectors */
-#define MEDIA_ENT_T_CONN_TEST (MEDIA_ENT_T_CONNECTOR_BASE + 4)
+
+#define MEDIA_ENT_F_IO_V4L (MEDIA_ENT_F_OLD_BASE + 1)
+
+#define MEDIA_ENT_F_CAM_SENSOR (MEDIA_ENT_F_OLD_SUBDEV_BASE + 1)
+#define MEDIA_ENT_F_FLASH (MEDIA_ENT_F_OLD_SUBDEV_BASE + 2)
+#define MEDIA_ENT_F_LENS (MEDIA_ENT_F_OLD_SUBDEV_BASE + 3)
+#define MEDIA_ENT_F_ATV_DECODER (MEDIA_ENT_F_OLD_SUBDEV_BASE + 4)
+#define MEDIA_ENT_F_TUNER (MEDIA_ENT_F_OLD_SUBDEV_BASE + 5)
+
+#define MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN MEDIA_ENT_F_OLD_SUBDEV_BASE
#ifndef __KERNEL__
-/* Legacy symbols used to avoid userspace compilation breakages */
+
+/*
+ * Legacy symbols used to avoid userspace compilation breakages
+ *
+ * Those symbols map the entity function into types and should be
+ * used only on legacy programs for legacy hardware. Don't rely
+ * on those for MEDIA_IOC_G_TOPOLOGY.
+ */
#define MEDIA_ENT_TYPE_SHIFT 16
#define MEDIA_ENT_TYPE_MASK 0x00ff0000
#define MEDIA_ENT_SUBTYPE_MASK 0x0000ffff
-#define MEDIA_ENT_T_DEVNODE MEDIA_ENT_T_V4L2_BASE
-#define MEDIA_ENT_T_V4L2_SUBDEV MEDIA_ENT_T_V4L2_SUBDEV_BASE
-
-#define MEDIA_ENT_T_DEVNODE_V4L MEDIA_ENT_T_V4L2_VIDEO
-
+#define MEDIA_ENT_T_DEVNODE MEDIA_ENT_F_OLD_BASE
+#define MEDIA_ENT_T_DEVNODE_V4L MEDIA_ENT_F_IO_V4L
#define MEDIA_ENT_T_DEVNODE_FB (MEDIA_ENT_T_DEVNODE + 2)
#define MEDIA_ENT_T_DEVNODE_ALSA (MEDIA_ENT_T_DEVNODE + 3)
#define MEDIA_ENT_T_DEVNODE_DVB (MEDIA_ENT_T_DEVNODE + 4)
+
+#define MEDIA_ENT_T_UNKNOWN MEDIA_ENT_F_UNKNOWN
+#define MEDIA_ENT_T_V4L2_VIDEO MEDIA_ENT_F_IO_V4L
+#define MEDIA_ENT_T_V4L2_SUBDEV MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN
+#define MEDIA_ENT_T_V4L2_SUBDEV_SENSOR MEDIA_ENT_F_CAM_SENSOR
+#define MEDIA_ENT_T_V4L2_SUBDEV_FLASH MEDIA_ENT_F_FLASH
+#define MEDIA_ENT_T_V4L2_SUBDEV_LENS MEDIA_ENT_F_LENS
+#define MEDIA_ENT_T_V4L2_SUBDEV_DECODER MEDIA_ENT_F_ATV_DECODER
+#define MEDIA_ENT_T_V4L2_SUBDEV_TUNER MEDIA_ENT_F_TUNER
#endif
/* Entity flags */