Hi Hans,
On Mon, Feb 19, 2018 at 11:38:06AM +0100, Hans Verkuil wrote:
> The media.h public header is very messy. It mixes legacy and 'new' defines
> and it is not easy to figure out what should and what shouldn't be used. It
> also contains confusing comment that are either out of date or completely
> uninteresting for anyone that needs to use this header.
>
> The patch groups all entity functions together, including the 'old' defines
> based on the old range base. The reader just wants to know about the available
> functions and doesn't care about what range is used.
>
> All legacy defines are moved to the end of the header, so it is easier to
> locate them and just ignore them.
>
> The legacy structs in the struct media_entity_desc are put under
> #if !defined(__KERNEL__) to prevent the kernel from using them, and this is
> also a much more effective signal to the reader that they shouldn't be used
> compared to the old method of relying on '#if 1' followed by a comment.
>
> The unused MEDIA_INTF_T_ALSA_* defines are also moved to the end of the header
> in the legacy area. They are also dropped from intf_type() in media-entity.c.
>
> All defines are also aligned at the same tab making the header easier to read.
>
> Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
> ---
> drivers/media/media-entity.c | 16 --
> include/uapi/linux/media.h | 345
> +++++++++++++++++++++----------------------
> 2 files changed, 166 insertions(+), 195 deletions(-)
>
> diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
> index f7c6d64e6031..3498551e618e 100644
> --- a/drivers/media/media-entity.c
> +++ b/drivers/media/media-entity.c
> @@ -64,22 +64,6 @@ static inline const char *intf_type(struct media_interface
> *intf)
> return "v4l-swradio";
> case MEDIA_INTF_T_V4L_TOUCH:
> return "v4l-touch";
> - case MEDIA_INTF_T_ALSA_PCM_CAPTURE:
> - return "alsa-pcm-capture";
> - case MEDIA_INTF_T_ALSA_PCM_PLAYBACK:
> - return "alsa-pcm-playback";
> - case MEDIA_INTF_T_ALSA_CONTROL:
> - return "alsa-control";
> - case MEDIA_INTF_T_ALSA_COMPRESS:
> - return "alsa-compress";
> - case MEDIA_INTF_T_ALSA_RAWMIDI:
> - return "alsa-rawmidi";
> - case MEDIA_INTF_T_ALSA_HWDEP:
> - return "alsa-hwdep";
> - case MEDIA_INTF_T_ALSA_SEQUENCER:
> - return "alsa-sequencer";
> - case MEDIA_INTF_T_ALSA_TIMER:
> - return "alsa-timer";
> default:
> return "unknown-intf";
> }
> diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h
> index 573da38a21c3..febe28054579 100644
> --- a/include/uapi/linux/media.h
> +++ b/include/uapi/linux/media.h
> @@ -15,10 +15,6 @@
> * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> */
>
> #ifndef __LINUX_MEDIA_H
> @@ -42,108 +38,65 @@ struct media_device_info {
> __u32 reserved[31];
> };
>
> -#define MEDIA_ENT_ID_FLAG_NEXT (1 << 31)
> -
> -/*
> - * Initial value to be used when a new entity is created
> - * Drivers should change it to something useful
> - */
> -#define MEDIA_ENT_F_UNKNOWN 0x00000000
> -
> /*
> * Base number ranges for entity functions
> *
> - * 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.
> + * NOTE: Userspace should not rely on these ranges to identify a group
> + * of function types, as newer functions can be added with any name within
> + * the full u32 range.
> + *
> + * Some older functions use the MEDIA_ENT_F_OLD_*_BASE range. Do not
> + * changes this, this is for backwards compatibility. When adding new
> + * functions always use MEDIA_ENT_F_BASE.
> */
> -#define MEDIA_ENT_F_BASE 0x00000000
> -#define MEDIA_ENT_F_OLD_BASE 0x00010000
> -#define MEDIA_ENT_F_OLD_SUBDEV_BASE 0x00020000
> +#define MEDIA_ENT_F_BASE 0x00000000
> +#define MEDIA_ENT_F_OLD_BASE 0x00010000
> +#define MEDIA_ENT_F_OLD_SUBDEV_BASE 0x00020000
>
> /*
> - * DVB entities
> + * Initial value to be used when a new entity is created
> + * Drivers should change it to something useful.
> */
> -#define MEDIA_ENT_F_DTV_DEMOD (MEDIA_ENT_F_BASE + 0x00001)
> -#define MEDIA_ENT_F_TS_DEMUX (MEDIA_ENT_F_BASE + 0x00002)
> -#define MEDIA_ENT_F_DTV_CA (MEDIA_ENT_F_BASE + 0x00003)
> -#define MEDIA_ENT_F_DTV_NET_DECAP (MEDIA_ENT_F_BASE + 0x00004)
> +#define MEDIA_ENT_F_UNKNOWN MEDIA_ENT_F_BASE
>
> /*
> - * I/O entities
> + * Subdevs are initialized with MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN in order
> + * to preserve backward compatibility. Drivers must change to the proper
> + * subdev type before registering the entity.
s/type/function/
I wonder if "should" would actually be better; the current API assumes an
entity has at most one function which is somehow defined by the API. I
guess you could force everything into some kind of a group, as the current
approach seems to be. This is also what the enumeration through
MEDIA_IOC_ENUM_ENTITIES will yield to for the new functions anyway.
> */
> -#define MEDIA_ENT_F_IO_DTV (MEDIA_ENT_F_BASE + 0x01001)
> -#define MEDIA_ENT_F_IO_VBI (MEDIA_ENT_F_BASE + 0x01002)
> -#define MEDIA_ENT_F_IO_SWRADIO (MEDIA_ENT_F_BASE + 0x01003)
> +#define MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN
> MEDIA_ENT_F_OLD_SUBDEV_BASE
>
> /*
> - * Analog TV IF-PLL decoders
> - *
> - * It is a responsibility of the master/bridge drivers to create links
> - * for MEDIA_ENT_F_IF_VID_DECODER and MEDIA_ENT_F_IF_AUD_DECODER.
> + * DVB entity functions
> */
> -#define MEDIA_ENT_F_IF_VID_DECODER (MEDIA_ENT_F_BASE + 0x02001)
> -#define MEDIA_ENT_F_IF_AUD_DECODER (MEDIA_ENT_F_BASE + 0x02002)
> +#define MEDIA_ENT_F_DTV_DEMOD (MEDIA_ENT_F_BASE +
> 0x00001)
> +#define MEDIA_ENT_F_TS_DEMUX (MEDIA_ENT_F_BASE + 0x00002)
> +#define MEDIA_ENT_F_DTV_CA (MEDIA_ENT_F_BASE + 0x00003)
> +#define MEDIA_ENT_F_DTV_NET_DECAP (MEDIA_ENT_F_BASE + 0x00004)
>
> /*
> - * Audio Entity Functions
> + * I/O entity functions
> */
> -#define MEDIA_ENT_F_AUDIO_CAPTURE (MEDIA_ENT_F_BASE + 0x03001)
> -#define MEDIA_ENT_F_AUDIO_PLAYBACK (MEDIA_ENT_F_BASE + 0x03002)
> -#define MEDIA_ENT_F_AUDIO_MIXER (MEDIA_ENT_F_BASE + 0x03003)
> +#define MEDIA_ENT_F_IO_V4L (MEDIA_ENT_F_OLD_BASE + 1)
> +#define MEDIA_ENT_F_IO_DTV (MEDIA_ENT_F_BASE + 0x01001)
> +#define MEDIA_ENT_F_IO_VBI (MEDIA_ENT_F_BASE + 0x01002)
> +#define MEDIA_ENT_F_IO_SWRADIO (MEDIA_ENT_F_BASE +
> 0x01003)
>
> /*
> - * Processing entities
> + * Sensor functions
> */
> -#define MEDIA_ENT_F_PROC_VIDEO_COMPOSER (MEDIA_ENT_F_BASE +
> 0x4001)
> -#define MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER (MEDIA_ENT_F_BASE +
> 0x4002)
> -#define MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV (MEDIA_ENT_F_BASE +
> 0x4003)
> -#define MEDIA_ENT_F_PROC_VIDEO_LUT (MEDIA_ENT_F_BASE + 0x4004)
> -#define MEDIA_ENT_F_PROC_VIDEO_SCALER (MEDIA_ENT_F_BASE +
> 0x4005)
> -#define MEDIA_ENT_F_PROC_VIDEO_STATISTICS (MEDIA_ENT_F_BASE + 0x4006)
> +#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)
>
> /*
> - * Switch and bridge entitites
> + * Analog video decoder functions
> */
> -#define MEDIA_ENT_F_VID_MUX (MEDIA_ENT_F_BASE + 0x5001)
> -#define MEDIA_ENT_F_VID_IF_BRIDGE (MEDIA_ENT_F_BASE + 0x5002)
> +#define MEDIA_ENT_F_ATV_DECODER
> (MEDIA_ENT_F_OLD_SUBDEV_BASE + 4)
>
> /*
> - * Connectors
> - */
> -/* It is a responsibility of the entity drivers to add connectors and links
> */
> -#ifdef __KERNEL__
> - /*
> - * For now, it should not be used in userspace, as some
> - * definitions may change
> - */
> -
> -#define MEDIA_ENT_F_CONN_RF (MEDIA_ENT_F_BASE + 0x30001)
> -#define MEDIA_ENT_F_CONN_SVIDEO (MEDIA_ENT_F_BASE + 0x30002)
> -#define MEDIA_ENT_F_CONN_COMPOSITE (MEDIA_ENT_F_BASE + 0x30003)
> -
> -#endif
> -
> -/*
> - * 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.
> + * Digital TV, analog TV, radio and/or software defined radio tuner
> functions.
> *
> - * Subdevs are initialized with MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN,
> - * in order to preserve backward compatibility.
> - * Drivers must change to the proper subdev type before
> - * registering the entity.
> - */
> -
> -#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)
> -/*
> * It is a responsibility of the master/bridge drivers to add connectors
> * and links for MEDIA_ENT_F_TUNER. Please notice that some old tuners
> * may require the usage of separate I2C chips to decode analog TV signals,
> @@ -151,49 +104,46 @@ struct media_device_info {
> * On such cases, the IF-PLL staging is mapped via one or two entities:
> * MEDIA_ENT_F_IF_VID_DECODER and/or MEDIA_ENT_F_IF_AUD_DECODER.
> */
> -#define MEDIA_ENT_F_TUNER (MEDIA_ENT_F_OLD_SUBDEV_BASE + 5)
> +#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
> +/*
> + * Analog TV IF-PLL decoder functions
> + *
> + * It is a responsibility of the master/bridge drivers to create links
> + * for MEDIA_ENT_F_IF_VID_DECODER and MEDIA_ENT_F_IF_AUD_DECODER.
> + */
> +#define MEDIA_ENT_F_IF_VID_DECODER (MEDIA_ENT_F_BASE + 0x02001)
> +#define MEDIA_ENT_F_IF_AUD_DECODER (MEDIA_ENT_F_BASE + 0x02002)
>
> -#if !defined(__KERNEL__) || defined(__NEED_MEDIA_LEGACY_API)
> +/*
> + * Audio entity functions
> + */
> +#define MEDIA_ENT_F_AUDIO_CAPTURE (MEDIA_ENT_F_BASE + 0x03001)
> +#define MEDIA_ENT_F_AUDIO_PLAYBACK (MEDIA_ENT_F_BASE + 0x03002)
> +#define MEDIA_ENT_F_AUDIO_MIXER (MEDIA_ENT_F_BASE +
> 0x03003)
>
> /*
> - * 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.
> + * Processing entity functions
> */
> -#define MEDIA_ENT_TYPE_SHIFT 16
> -#define MEDIA_ENT_TYPE_MASK 0x00ff0000
> -#define MEDIA_ENT_SUBTYPE_MASK 0x0000ffff
> -
> -/* End of the old subdev reserved numberspace */
> -#define MEDIA_ENT_T_DEVNODE_UNKNOWN (MEDIA_ENT_T_DEVNODE | \
> - MEDIA_ENT_SUBTYPE_MASK)
> -
> -#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
> +#define MEDIA_ENT_F_PROC_VIDEO_COMPOSER (MEDIA_ENT_F_BASE +
> 0x4001)
> +#define MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER (MEDIA_ENT_F_BASE +
> 0x4002)
> +#define MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV (MEDIA_ENT_F_BASE +
> 0x4003)
> +#define MEDIA_ENT_F_PROC_VIDEO_LUT (MEDIA_ENT_F_BASE + 0x4004)
> +#define MEDIA_ENT_F_PROC_VIDEO_SCALER (MEDIA_ENT_F_BASE +
> 0x4005)
> +#define MEDIA_ENT_F_PROC_VIDEO_STATISTICS (MEDIA_ENT_F_BASE + 0x4006)
>
> -/* Obsolete symbol for media_version, no longer used in the kernel */
> -#define MEDIA_API_VERSION KERNEL_VERSION(0, 1, 0)
> -#endif
> +/*
> + * Switch and bridge entity functions
> + */
> +#define MEDIA_ENT_F_VID_MUX (MEDIA_ENT_F_BASE + 0x5001)
> +#define MEDIA_ENT_F_VID_IF_BRIDGE (MEDIA_ENT_F_BASE + 0x5002)
>
> /* Entity flags */
> -#define MEDIA_ENT_FL_DEFAULT (1 << 0)
> -#define MEDIA_ENT_FL_CONNECTOR (1 << 1)
> +#define MEDIA_ENT_FL_DEFAULT (1 << 0)
> +#define MEDIA_ENT_FL_CONNECTOR (1 << 1)
> +
> +/* OR with the entity id value to find the next entity */
This comment is confusing, I'd prefer to either drop or improve it. This is
well documented in uAPI documentation after all.
> +#define MEDIA_ENT_ID_FLAG_NEXT (1 << 31)
>
> struct media_entity_desc {
> __u32 id;
> @@ -214,7 +164,7 @@ struct media_entity_desc {
> __u32 minor;
> } dev;
>
> -#if 1
> +#if !defined(__KERNEL__)
> /*
> * TODO: this shouldn't have been added without
> * actual drivers that use this. When the first real driver
> @@ -225,24 +175,17 @@ struct media_entity_desc {
> * contain the subdevice information. In addition, struct dev
> * can only refer to a single device, and not to multiple (e.g.
> * pcm and mixer devices).
> - *
> - * So for now mark this as a to do.
> */
> struct {
> __u32 card;
> __u32 device;
> __u32 subdevice;
> } alsa;
> -#endif
>
> -#if 1
> /*
> * DEPRECATED: previous node specifications. Kept just to
> - * avoid breaking compilation, but media_entity_desc.dev
> - * should be used instead. In particular, alsa and dvb
> - * fields below are wrong: for all devnodes, there should
> - * be just major/minor inside the struct, as this is enough
> - * to represent any devnode, no matter what type.
> + * avoid breaking compilation. Use media_entity_desc.dev
> + * instead.
> */
> struct {
> __u32 major;
> @@ -261,9 +204,9 @@ struct media_entity_desc {
> };
> };
>
> -#define MEDIA_PAD_FL_SINK (1 << 0)
> -#define MEDIA_PAD_FL_SOURCE (1 << 1)
> -#define MEDIA_PAD_FL_MUST_CONNECT (1 << 2)
> +#define MEDIA_PAD_FL_SINK (1 << 0)
> +#define MEDIA_PAD_FL_SOURCE (1 << 1)
> +#define MEDIA_PAD_FL_MUST_CONNECT (1 << 2)
>
> struct media_pad_desc {
> __u32 entity; /* entity ID */
> @@ -272,13 +215,13 @@ struct media_pad_desc {
> __u32 reserved[2];
> };
>
> -#define MEDIA_LNK_FL_ENABLED (1 << 0)
> -#define MEDIA_LNK_FL_IMMUTABLE (1 << 1)
> -#define MEDIA_LNK_FL_DYNAMIC (1 << 2)
> +#define MEDIA_LNK_FL_ENABLED (1 << 0)
> +#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)
> +#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;
> @@ -298,57 +241,47 @@ struct media_links_enum {
>
> /* Interface type ranges */
>
> -#define MEDIA_INTF_T_DVB_BASE 0x00000100
> -#define MEDIA_INTF_T_V4L_BASE 0x00000200
> -#define MEDIA_INTF_T_ALSA_BASE 0x00000300
> +#define MEDIA_INTF_T_DVB_BASE 0x00000100
> +#define MEDIA_INTF_T_V4L_BASE 0x00000200
>
> /* Interface types */
>
> -#define MEDIA_INTF_T_DVB_FE (MEDIA_INTF_T_DVB_BASE)
> -#define MEDIA_INTF_T_DVB_DEMUX (MEDIA_INTF_T_DVB_BASE + 1)
> -#define MEDIA_INTF_T_DVB_DVR (MEDIA_INTF_T_DVB_BASE + 2)
> -#define MEDIA_INTF_T_DVB_CA (MEDIA_INTF_T_DVB_BASE + 3)
> -#define MEDIA_INTF_T_DVB_NET (MEDIA_INTF_T_DVB_BASE + 4)
> -
> -#define MEDIA_INTF_T_V4L_VIDEO (MEDIA_INTF_T_V4L_BASE)
> -#define MEDIA_INTF_T_V4L_VBI (MEDIA_INTF_T_V4L_BASE + 1)
> -#define MEDIA_INTF_T_V4L_RADIO (MEDIA_INTF_T_V4L_BASE + 2)
> -#define MEDIA_INTF_T_V4L_SUBDEV (MEDIA_INTF_T_V4L_BASE + 3)
> -#define MEDIA_INTF_T_V4L_SWRADIO (MEDIA_INTF_T_V4L_BASE + 4)
> -#define MEDIA_INTF_T_V4L_TOUCH (MEDIA_INTF_T_V4L_BASE + 5)
> -
> -#define MEDIA_INTF_T_ALSA_PCM_CAPTURE (MEDIA_INTF_T_ALSA_BASE)
> -#define MEDIA_INTF_T_ALSA_PCM_PLAYBACK (MEDIA_INTF_T_ALSA_BASE + 1)
> -#define MEDIA_INTF_T_ALSA_CONTROL (MEDIA_INTF_T_ALSA_BASE + 2)
> -#define MEDIA_INTF_T_ALSA_COMPRESS (MEDIA_INTF_T_ALSA_BASE + 3)
> -#define MEDIA_INTF_T_ALSA_RAWMIDI (MEDIA_INTF_T_ALSA_BASE + 4)
> -#define MEDIA_INTF_T_ALSA_HWDEP (MEDIA_INTF_T_ALSA_BASE + 5)
> -#define MEDIA_INTF_T_ALSA_SEQUENCER (MEDIA_INTF_T_ALSA_BASE + 6)
> -#define MEDIA_INTF_T_ALSA_TIMER (MEDIA_INTF_T_ALSA_BASE + 7)
> +#define MEDIA_INTF_T_DVB_FE (MEDIA_INTF_T_DVB_BASE)
> +#define MEDIA_INTF_T_DVB_DEMUX (MEDIA_INTF_T_DVB_BASE + 1)
> +#define MEDIA_INTF_T_DVB_DVR (MEDIA_INTF_T_DVB_BASE + 2)
> +#define MEDIA_INTF_T_DVB_CA (MEDIA_INTF_T_DVB_BASE + 3)
> +#define MEDIA_INTF_T_DVB_NET (MEDIA_INTF_T_DVB_BASE + 4)
> +
> +#define MEDIA_INTF_T_V4L_VIDEO (MEDIA_INTF_T_V4L_BASE)
> +#define MEDIA_INTF_T_V4L_VBI (MEDIA_INTF_T_V4L_BASE + 1)
> +#define MEDIA_INTF_T_V4L_RADIO (MEDIA_INTF_T_V4L_BASE + 2)
> +#define MEDIA_INTF_T_V4L_SUBDEV (MEDIA_INTF_T_V4L_BASE + 3)
> +#define MEDIA_INTF_T_V4L_SWRADIO (MEDIA_INTF_T_V4L_BASE + 4)
> +#define MEDIA_INTF_T_V4L_TOUCH (MEDIA_INTF_T_V4L_BASE
> + 5)
> +
> +#if defined(__KERNEL__)
>
> /*
> - * MC next gen API definitions
> + * Connector functions
> *
> - * 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.
> + * For now these should not be used in userspace, as some definitions may
> + * change.
> *
> - * 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.
> + * It is the responsibility of the entity drivers to add connectors and
> links.
> */
> +#define MEDIA_ENT_F_CONN_RF (MEDIA_ENT_F_BASE + 0x30001)
> +#define MEDIA_ENT_F_CONN_SVIDEO (MEDIA_ENT_F_BASE +
> 0x30002)
> +#define MEDIA_ENT_F_CONN_COMPOSITE (MEDIA_ENT_F_BASE + 0x30003)
>
> +#endif
> +
> +/*
> + * MC next gen API definitions
> + */
>
> struct media_v2_entity {
> __u32 id;
> - char name[64]; /* FIXME: move to a property? (RFC says so) */
> + char name[64];
> __u32 function; /* Main function of the entity */
> __u32 reserved[6];
> } __attribute__ ((packed));
> @@ -406,12 +339,66 @@ struct media_v2_topology {
> __u64 ptr_links;
> } __attribute__ ((packed));
>
> +
> /* 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)
> +#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)
> +
> +
> +#if !defined(__KERNEL__) || defined(__NEED_MEDIA_LEGACY_API)
> +
> +/*
> + * Legacy symbols used to avoid userspace compilation breakages.
> + * Do not use any of this in new applications!
> + *
> + * 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_UNKNOWN (MEDIA_ENT_F_OLD_BASE | \
> + MEDIA_ENT_SUBTYPE_MASK)
> +
> +#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_F_OLD_BASE +
> 2)
> +#define MEDIA_ENT_T_DEVNODE_ALSA (MEDIA_ENT_F_OLD_BASE + 3)
> +#define MEDIA_ENT_T_DEVNODE_DVB (MEDIA_ENT_F_OLD_BASE +
> 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
> +
> +/*
> + * There is still no ALSA support in the media controller. These
> + * defines should not have been added and we leave them here only
> + * in case some application tries to use these defines.
> + */
> +#define MEDIA_INTF_T_ALSA_BASE 0x00000300
> +#define MEDIA_INTF_T_ALSA_PCM_CAPTURE (MEDIA_INTF_T_ALSA_BASE)
> +#define MEDIA_INTF_T_ALSA_PCM_PLAYBACK (MEDIA_INTF_T_ALSA_BASE + 1)
> +#define MEDIA_INTF_T_ALSA_CONTROL (MEDIA_INTF_T_ALSA_BASE + 2)
> +#define MEDIA_INTF_T_ALSA_COMPRESS (MEDIA_INTF_T_ALSA_BASE + 3)
> +#define MEDIA_INTF_T_ALSA_RAWMIDI (MEDIA_INTF_T_ALSA_BASE + 4)
> +#define MEDIA_INTF_T_ALSA_HWDEP (MEDIA_INTF_T_ALSA_BASE + 5)
> +#define MEDIA_INTF_T_ALSA_SEQUENCER (MEDIA_INTF_T_ALSA_BASE + 6)
> +#define MEDIA_INTF_T_ALSA_TIMER (MEDIA_INTF_T_ALSA_BASE + 7)
> +
> +/* Obsolete symbol for media_version, no longer used in the kernel */
> +#define MEDIA_API_VERSION KERNEL_VERSION(0, 1, 0)
> +
> +#endif
>
> #endif /* __LINUX_MEDIA_H */
--
Regards,
Sakari Ailus
e-mail: sakari.ai...@iki.fi
