From 80f9e75b2fce22552fdf56ade990f3f98567e29e Mon Sep 17 00:00:00 2001 From: Maxime Jourdan Date: Thu, 4 Oct 2018 15:37:39 +0200 Subject: [PATCH] media: videodev2: add V4L2_FMT_FLAG_NO_SOURCE_CHANGE When a v4l2 driver exposes V4L2_EVENT_SOURCE_CHANGE, some (usually OUTPUT) formats may not be able to trigger this event. Add a enum_fmt format flag to tag those specific formats. Signed-off-by: Maxime Jourdan --- Documentation/media/uapi/v4l/vidioc-enum-fmt.rst | 5 +++++ include/uapi/linux/videodev2.h | 5 +++-- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst b/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst index 019c513..e0040b3 100644 --- a/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst +++ b/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst @@ -116,6 +116,11 @@ one until ``EINVAL`` is returned. - This format is not native to the device but emulated through software (usually libv4l2), where possible try to use a native format instead for better performance. + * - ``V4L2_FMT_FLAG_NO_SOURCE_CHANGE`` + - 0x0004 + - The event ``V4L2_EVENT_SOURCE_CHANGE`` is not supported + for this format. + Return Value diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 1aae2e4..f44bdef 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -733,8 +733,9 @@ struct v4l2_fmtdesc { __u32 reserved[4]; }; -#define V4L2_FMT_FLAG_COMPRESSED 0x0001 -#define V4L2_FMT_FLAG_EMULATED 0x0002 +#define V4L2_FMT_FLAG_COMPRESSED 0x0001 +#define V4L2_FMT_FLAG_EMULATED 0x0002 +#define V4L2_FMT_FLAG_NO_SOURCE_CHANGE 0x0004 /* Frame Size and frame rate enumeration */ /*