On Mon, Apr 9, 2018 at 11:20 PM Hans Verkuil <hverkuil@xxxxxxxxx> wrote:
> From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
> Define the public request API.
> This adds the new MEDIA_IOC_REQUEST_ALLOC ioctl to allocate a request
> and two ioctls that operate on a request in order to queue the
> contents of the request to the driver and to re-initialize the
> request.
> Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Like it that the API stays simple, with request ioctls tied to request FDs.
Acked-by: Alexandre Courbot <acourbot@xxxxxxxxxxxx>
> ---
> include/uapi/linux/media.h | 8 ++++++++
> 1 file changed, 8 insertions(+)
> diff --git a/include/uapi/linux/media.h b/include/uapi/linux/media.h
> index c7e9a5cba24e..f8769e74f847 100644
> --- a/include/uapi/linux/media.h
> +++ b/include/uapi/linux/media.h
> @@ -342,11 +342,19 @@ struct media_v2_topology {
> /* ioctls */
> +struct __attribute__ ((packed)) media_request_alloc {
> + __s32 fd;
> +};
> +
> #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_REQUEST_ALLOC _IOWR('|', 0x05, struct
media_request_alloc)
> +
> +#define MEDIA_REQUEST_IOC_QUEUE _IO('|', 0x80)
> +#define MEDIA_REQUEST_IOC_REINIT _IO('|', 0x81)
> #if !defined(__KERNEL__) || defined(__NEED_MEDIA_LEGACY_API)
> --
> 2.16.3
